1 //===-- ARMISelLowering.cpp - ARM DAG Lowering Implementation -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that ARM uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #include "ARMISelLowering.h"
16 #include "ARMCallingConv.h"
17 #include "ARMConstantPoolValue.h"
18 #include "ARMMachineFunctionInfo.h"
19 #include "ARMPerfectShuffle.h"
20 #include "ARMSubtarget.h"
21 #include "ARMTargetMachine.h"
22 #include "ARMTargetObjectFile.h"
23 #include "MCTargetDesc/ARMAddressingModes.h"
24 #include "llvm/ADT/Statistic.h"
25 #include "llvm/ADT/StringExtras.h"
26 #include "llvm/CodeGen/CallingConvLower.h"
27 #include "llvm/CodeGen/IntrinsicLowering.h"
28 #include "llvm/CodeGen/MachineBasicBlock.h"
29 #include "llvm/CodeGen/MachineFrameInfo.h"
30 #include "llvm/CodeGen/MachineFunction.h"
31 #include "llvm/CodeGen/MachineInstrBuilder.h"
32 #include "llvm/CodeGen/MachineModuleInfo.h"
33 #include "llvm/CodeGen/MachineRegisterInfo.h"
34 #include "llvm/CodeGen/SelectionDAG.h"
35 #include "llvm/IR/CallingConv.h"
36 #include "llvm/IR/Constants.h"
37 #include "llvm/IR/Function.h"
38 #include "llvm/IR/GlobalValue.h"
39 #include "llvm/IR/IRBuilder.h"
40 #include "llvm/IR/Instruction.h"
41 #include "llvm/IR/Instructions.h"
42 #include "llvm/IR/Intrinsics.h"
43 #include "llvm/IR/Type.h"
44 #include "llvm/MC/MCSectionMachO.h"
45 #include "llvm/Support/CommandLine.h"
46 #include "llvm/Support/Debug.h"
47 #include "llvm/Support/ErrorHandling.h"
48 #include "llvm/Support/MathExtras.h"
49 #include "llvm/Target/TargetOptions.h"
53 #define DEBUG_TYPE "arm-isel"
55 STATISTIC(NumTailCalls, "Number of tail calls");
56 STATISTIC(NumMovwMovt, "Number of GAs materialized with movw + movt");
57 STATISTIC(NumLoopByVals, "Number of loops generated for byval arguments");
60 EnableARMLongCalls("arm-long-calls", cl::Hidden,
61 cl::desc("Generate calls via indirect call instructions"),
65 ARMInterworking("arm-interworking", cl::Hidden,
66 cl::desc("Enable / disable ARM interworking (for debugging only)"),
70 class ARMCCState : public CCState {
72 ARMCCState(CallingConv::ID CC, bool isVarArg, MachineFunction &MF,
73 const TargetMachine &TM, SmallVectorImpl<CCValAssign> &locs,
74 LLVMContext &C, ParmContext PC)
75 : CCState(CC, isVarArg, MF, TM, locs, C) {
76 assert(((PC == Call) || (PC == Prologue)) &&
77 "ARMCCState users must specify whether their context is call"
78 "or prologue generation.");
84 // The APCS parameter registers.
85 static const MCPhysReg GPRArgRegs[] = {
86 ARM::R0, ARM::R1, ARM::R2, ARM::R3
89 void ARMTargetLowering::addTypeForNEON(MVT VT, MVT PromotedLdStVT,
90 MVT PromotedBitwiseVT) {
91 if (VT != PromotedLdStVT) {
92 setOperationAction(ISD::LOAD, VT, Promote);
93 AddPromotedToType (ISD::LOAD, VT, PromotedLdStVT);
95 setOperationAction(ISD::STORE, VT, Promote);
96 AddPromotedToType (ISD::STORE, VT, PromotedLdStVT);
99 MVT ElemTy = VT.getVectorElementType();
100 if (ElemTy != MVT::i64 && ElemTy != MVT::f64)
101 setOperationAction(ISD::SETCC, VT, Custom);
102 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom);
103 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
104 if (ElemTy == MVT::i32) {
105 setOperationAction(ISD::SINT_TO_FP, VT, Custom);
106 setOperationAction(ISD::UINT_TO_FP, VT, Custom);
107 setOperationAction(ISD::FP_TO_SINT, VT, Custom);
108 setOperationAction(ISD::FP_TO_UINT, VT, Custom);
110 setOperationAction(ISD::SINT_TO_FP, VT, Expand);
111 setOperationAction(ISD::UINT_TO_FP, VT, Expand);
112 setOperationAction(ISD::FP_TO_SINT, VT, Expand);
113 setOperationAction(ISD::FP_TO_UINT, VT, Expand);
115 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
116 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
117 setOperationAction(ISD::CONCAT_VECTORS, VT, Legal);
118 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Legal);
119 setOperationAction(ISD::SELECT, VT, Expand);
120 setOperationAction(ISD::SELECT_CC, VT, Expand);
121 setOperationAction(ISD::VSELECT, VT, Expand);
122 setOperationAction(ISD::SIGN_EXTEND_INREG, VT, Expand);
123 if (VT.isInteger()) {
124 setOperationAction(ISD::SHL, VT, Custom);
125 setOperationAction(ISD::SRA, VT, Custom);
126 setOperationAction(ISD::SRL, VT, Custom);
129 // Promote all bit-wise operations.
130 if (VT.isInteger() && VT != PromotedBitwiseVT) {
131 setOperationAction(ISD::AND, VT, Promote);
132 AddPromotedToType (ISD::AND, VT, PromotedBitwiseVT);
133 setOperationAction(ISD::OR, VT, Promote);
134 AddPromotedToType (ISD::OR, VT, PromotedBitwiseVT);
135 setOperationAction(ISD::XOR, VT, Promote);
136 AddPromotedToType (ISD::XOR, VT, PromotedBitwiseVT);
139 // Neon does not support vector divide/remainder operations.
140 setOperationAction(ISD::SDIV, VT, Expand);
141 setOperationAction(ISD::UDIV, VT, Expand);
142 setOperationAction(ISD::FDIV, VT, Expand);
143 setOperationAction(ISD::SREM, VT, Expand);
144 setOperationAction(ISD::UREM, VT, Expand);
145 setOperationAction(ISD::FREM, VT, Expand);
148 void ARMTargetLowering::addDRTypeForNEON(MVT VT) {
149 addRegisterClass(VT, &ARM::DPRRegClass);
150 addTypeForNEON(VT, MVT::f64, MVT::v2i32);
153 void ARMTargetLowering::addQRTypeForNEON(MVT VT) {
154 addRegisterClass(VT, &ARM::DPairRegClass);
155 addTypeForNEON(VT, MVT::v2f64, MVT::v4i32);
158 static TargetLoweringObjectFile *createTLOF(TargetMachine &TM) {
159 if (TM.getSubtarget<ARMSubtarget>().isTargetMachO())
160 return new TargetLoweringObjectFileMachO();
162 return new ARMElfTargetObjectFile();
165 ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
166 : TargetLowering(TM, createTLOF(TM)) {
167 Subtarget = &TM.getSubtarget<ARMSubtarget>();
168 RegInfo = TM.getRegisterInfo();
169 Itins = TM.getInstrItineraryData();
171 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
173 if (Subtarget->isTargetMachO()) {
174 // Uses VFP for Thumb libfuncs if available.
175 if (Subtarget->isThumb() && Subtarget->hasVFP2() &&
176 Subtarget->hasARMOps() && !TM.Options.UseSoftFloat) {
177 // Single-precision floating-point arithmetic.
178 setLibcallName(RTLIB::ADD_F32, "__addsf3vfp");
179 setLibcallName(RTLIB::SUB_F32, "__subsf3vfp");
180 setLibcallName(RTLIB::MUL_F32, "__mulsf3vfp");
181 setLibcallName(RTLIB::DIV_F32, "__divsf3vfp");
183 // Double-precision floating-point arithmetic.
184 setLibcallName(RTLIB::ADD_F64, "__adddf3vfp");
185 setLibcallName(RTLIB::SUB_F64, "__subdf3vfp");
186 setLibcallName(RTLIB::MUL_F64, "__muldf3vfp");
187 setLibcallName(RTLIB::DIV_F64, "__divdf3vfp");
189 // Single-precision comparisons.
190 setLibcallName(RTLIB::OEQ_F32, "__eqsf2vfp");
191 setLibcallName(RTLIB::UNE_F32, "__nesf2vfp");
192 setLibcallName(RTLIB::OLT_F32, "__ltsf2vfp");
193 setLibcallName(RTLIB::OLE_F32, "__lesf2vfp");
194 setLibcallName(RTLIB::OGE_F32, "__gesf2vfp");
195 setLibcallName(RTLIB::OGT_F32, "__gtsf2vfp");
196 setLibcallName(RTLIB::UO_F32, "__unordsf2vfp");
197 setLibcallName(RTLIB::O_F32, "__unordsf2vfp");
199 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
200 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETNE);
201 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
202 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
203 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
204 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
205 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
206 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
208 // Double-precision comparisons.
209 setLibcallName(RTLIB::OEQ_F64, "__eqdf2vfp");
210 setLibcallName(RTLIB::UNE_F64, "__nedf2vfp");
211 setLibcallName(RTLIB::OLT_F64, "__ltdf2vfp");
212 setLibcallName(RTLIB::OLE_F64, "__ledf2vfp");
213 setLibcallName(RTLIB::OGE_F64, "__gedf2vfp");
214 setLibcallName(RTLIB::OGT_F64, "__gtdf2vfp");
215 setLibcallName(RTLIB::UO_F64, "__unorddf2vfp");
216 setLibcallName(RTLIB::O_F64, "__unorddf2vfp");
218 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
219 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETNE);
220 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
221 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
222 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
223 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
224 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
225 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
227 // Floating-point to integer conversions.
228 // i64 conversions are done via library routines even when generating VFP
229 // instructions, so use the same ones.
230 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__fixdfsivfp");
231 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__fixunsdfsivfp");
232 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__fixsfsivfp");
233 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__fixunssfsivfp");
235 // Conversions between floating types.
236 setLibcallName(RTLIB::FPROUND_F64_F32, "__truncdfsf2vfp");
237 setLibcallName(RTLIB::FPEXT_F32_F64, "__extendsfdf2vfp");
239 // Integer to floating-point conversions.
240 // i64 conversions are done via library routines even when generating VFP
241 // instructions, so use the same ones.
242 // FIXME: There appears to be some naming inconsistency in ARM libgcc:
243 // e.g., __floatunsidf vs. __floatunssidfvfp.
244 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__floatsidfvfp");
245 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__floatunssidfvfp");
246 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__floatsisfvfp");
247 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__floatunssisfvfp");
251 // These libcalls are not available in 32-bit.
252 setLibcallName(RTLIB::SHL_I128, nullptr);
253 setLibcallName(RTLIB::SRL_I128, nullptr);
254 setLibcallName(RTLIB::SRA_I128, nullptr);
256 if (Subtarget->isAAPCS_ABI() && !Subtarget->isTargetMachO() &&
257 !Subtarget->isTargetWindows()) {
258 // Double-precision floating-point arithmetic helper functions
259 // RTABI chapter 4.1.2, Table 2
260 setLibcallName(RTLIB::ADD_F64, "__aeabi_dadd");
261 setLibcallName(RTLIB::DIV_F64, "__aeabi_ddiv");
262 setLibcallName(RTLIB::MUL_F64, "__aeabi_dmul");
263 setLibcallName(RTLIB::SUB_F64, "__aeabi_dsub");
264 setLibcallCallingConv(RTLIB::ADD_F64, CallingConv::ARM_AAPCS);
265 setLibcallCallingConv(RTLIB::DIV_F64, CallingConv::ARM_AAPCS);
266 setLibcallCallingConv(RTLIB::MUL_F64, CallingConv::ARM_AAPCS);
267 setLibcallCallingConv(RTLIB::SUB_F64, CallingConv::ARM_AAPCS);
269 // Double-precision floating-point comparison helper functions
270 // RTABI chapter 4.1.2, Table 3
271 setLibcallName(RTLIB::OEQ_F64, "__aeabi_dcmpeq");
272 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
273 setLibcallName(RTLIB::UNE_F64, "__aeabi_dcmpeq");
274 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETEQ);
275 setLibcallName(RTLIB::OLT_F64, "__aeabi_dcmplt");
276 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
277 setLibcallName(RTLIB::OLE_F64, "__aeabi_dcmple");
278 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
279 setLibcallName(RTLIB::OGE_F64, "__aeabi_dcmpge");
280 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
281 setLibcallName(RTLIB::OGT_F64, "__aeabi_dcmpgt");
282 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
283 setLibcallName(RTLIB::UO_F64, "__aeabi_dcmpun");
284 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
285 setLibcallName(RTLIB::O_F64, "__aeabi_dcmpun");
286 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
287 setLibcallCallingConv(RTLIB::OEQ_F64, CallingConv::ARM_AAPCS);
288 setLibcallCallingConv(RTLIB::UNE_F64, CallingConv::ARM_AAPCS);
289 setLibcallCallingConv(RTLIB::OLT_F64, CallingConv::ARM_AAPCS);
290 setLibcallCallingConv(RTLIB::OLE_F64, CallingConv::ARM_AAPCS);
291 setLibcallCallingConv(RTLIB::OGE_F64, CallingConv::ARM_AAPCS);
292 setLibcallCallingConv(RTLIB::OGT_F64, CallingConv::ARM_AAPCS);
293 setLibcallCallingConv(RTLIB::UO_F64, CallingConv::ARM_AAPCS);
294 setLibcallCallingConv(RTLIB::O_F64, CallingConv::ARM_AAPCS);
296 // Single-precision floating-point arithmetic helper functions
297 // RTABI chapter 4.1.2, Table 4
298 setLibcallName(RTLIB::ADD_F32, "__aeabi_fadd");
299 setLibcallName(RTLIB::DIV_F32, "__aeabi_fdiv");
300 setLibcallName(RTLIB::MUL_F32, "__aeabi_fmul");
301 setLibcallName(RTLIB::SUB_F32, "__aeabi_fsub");
302 setLibcallCallingConv(RTLIB::ADD_F32, CallingConv::ARM_AAPCS);
303 setLibcallCallingConv(RTLIB::DIV_F32, CallingConv::ARM_AAPCS);
304 setLibcallCallingConv(RTLIB::MUL_F32, CallingConv::ARM_AAPCS);
305 setLibcallCallingConv(RTLIB::SUB_F32, CallingConv::ARM_AAPCS);
307 // Single-precision floating-point comparison helper functions
308 // RTABI chapter 4.1.2, Table 5
309 setLibcallName(RTLIB::OEQ_F32, "__aeabi_fcmpeq");
310 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
311 setLibcallName(RTLIB::UNE_F32, "__aeabi_fcmpeq");
312 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETEQ);
313 setLibcallName(RTLIB::OLT_F32, "__aeabi_fcmplt");
314 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
315 setLibcallName(RTLIB::OLE_F32, "__aeabi_fcmple");
316 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
317 setLibcallName(RTLIB::OGE_F32, "__aeabi_fcmpge");
318 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
319 setLibcallName(RTLIB::OGT_F32, "__aeabi_fcmpgt");
320 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
321 setLibcallName(RTLIB::UO_F32, "__aeabi_fcmpun");
322 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
323 setLibcallName(RTLIB::O_F32, "__aeabi_fcmpun");
324 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
325 setLibcallCallingConv(RTLIB::OEQ_F32, CallingConv::ARM_AAPCS);
326 setLibcallCallingConv(RTLIB::UNE_F32, CallingConv::ARM_AAPCS);
327 setLibcallCallingConv(RTLIB::OLT_F32, CallingConv::ARM_AAPCS);
328 setLibcallCallingConv(RTLIB::OLE_F32, CallingConv::ARM_AAPCS);
329 setLibcallCallingConv(RTLIB::OGE_F32, CallingConv::ARM_AAPCS);
330 setLibcallCallingConv(RTLIB::OGT_F32, CallingConv::ARM_AAPCS);
331 setLibcallCallingConv(RTLIB::UO_F32, CallingConv::ARM_AAPCS);
332 setLibcallCallingConv(RTLIB::O_F32, CallingConv::ARM_AAPCS);
334 // Floating-point to integer conversions.
335 // RTABI chapter 4.1.2, Table 6
336 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__aeabi_d2iz");
337 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__aeabi_d2uiz");
338 setLibcallName(RTLIB::FPTOSINT_F64_I64, "__aeabi_d2lz");
339 setLibcallName(RTLIB::FPTOUINT_F64_I64, "__aeabi_d2ulz");
340 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__aeabi_f2iz");
341 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__aeabi_f2uiz");
342 setLibcallName(RTLIB::FPTOSINT_F32_I64, "__aeabi_f2lz");
343 setLibcallName(RTLIB::FPTOUINT_F32_I64, "__aeabi_f2ulz");
344 setLibcallCallingConv(RTLIB::FPTOSINT_F64_I32, CallingConv::ARM_AAPCS);
345 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I32, CallingConv::ARM_AAPCS);
346 setLibcallCallingConv(RTLIB::FPTOSINT_F64_I64, CallingConv::ARM_AAPCS);
347 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I64, CallingConv::ARM_AAPCS);
348 setLibcallCallingConv(RTLIB::FPTOSINT_F32_I32, CallingConv::ARM_AAPCS);
349 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I32, CallingConv::ARM_AAPCS);
350 setLibcallCallingConv(RTLIB::FPTOSINT_F32_I64, CallingConv::ARM_AAPCS);
351 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I64, CallingConv::ARM_AAPCS);
353 // Conversions between floating types.
354 // RTABI chapter 4.1.2, Table 7
355 setLibcallName(RTLIB::FPROUND_F64_F32, "__aeabi_d2f");
356 setLibcallName(RTLIB::FPEXT_F32_F64, "__aeabi_f2d");
357 setLibcallCallingConv(RTLIB::FPROUND_F64_F32, CallingConv::ARM_AAPCS);
358 setLibcallCallingConv(RTLIB::FPEXT_F32_F64, CallingConv::ARM_AAPCS);
360 // Integer to floating-point conversions.
361 // RTABI chapter 4.1.2, Table 8
362 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__aeabi_i2d");
363 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__aeabi_ui2d");
364 setLibcallName(RTLIB::SINTTOFP_I64_F64, "__aeabi_l2d");
365 setLibcallName(RTLIB::UINTTOFP_I64_F64, "__aeabi_ul2d");
366 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__aeabi_i2f");
367 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__aeabi_ui2f");
368 setLibcallName(RTLIB::SINTTOFP_I64_F32, "__aeabi_l2f");
369 setLibcallName(RTLIB::UINTTOFP_I64_F32, "__aeabi_ul2f");
370 setLibcallCallingConv(RTLIB::SINTTOFP_I32_F64, CallingConv::ARM_AAPCS);
371 setLibcallCallingConv(RTLIB::UINTTOFP_I32_F64, CallingConv::ARM_AAPCS);
372 setLibcallCallingConv(RTLIB::SINTTOFP_I64_F64, CallingConv::ARM_AAPCS);
373 setLibcallCallingConv(RTLIB::UINTTOFP_I64_F64, CallingConv::ARM_AAPCS);
374 setLibcallCallingConv(RTLIB::SINTTOFP_I32_F32, CallingConv::ARM_AAPCS);
375 setLibcallCallingConv(RTLIB::UINTTOFP_I32_F32, CallingConv::ARM_AAPCS);
376 setLibcallCallingConv(RTLIB::SINTTOFP_I64_F32, CallingConv::ARM_AAPCS);
377 setLibcallCallingConv(RTLIB::UINTTOFP_I64_F32, CallingConv::ARM_AAPCS);
379 // Long long helper functions
380 // RTABI chapter 4.2, Table 9
381 setLibcallName(RTLIB::MUL_I64, "__aeabi_lmul");
382 setLibcallName(RTLIB::SHL_I64, "__aeabi_llsl");
383 setLibcallName(RTLIB::SRL_I64, "__aeabi_llsr");
384 setLibcallName(RTLIB::SRA_I64, "__aeabi_lasr");
385 setLibcallCallingConv(RTLIB::MUL_I64, CallingConv::ARM_AAPCS);
386 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::ARM_AAPCS);
387 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::ARM_AAPCS);
388 setLibcallCallingConv(RTLIB::SHL_I64, CallingConv::ARM_AAPCS);
389 setLibcallCallingConv(RTLIB::SRL_I64, CallingConv::ARM_AAPCS);
390 setLibcallCallingConv(RTLIB::SRA_I64, CallingConv::ARM_AAPCS);
392 // Integer division functions
393 // RTABI chapter 4.3.1
394 setLibcallName(RTLIB::SDIV_I8, "__aeabi_idiv");
395 setLibcallName(RTLIB::SDIV_I16, "__aeabi_idiv");
396 setLibcallName(RTLIB::SDIV_I32, "__aeabi_idiv");
397 setLibcallName(RTLIB::SDIV_I64, "__aeabi_ldivmod");
398 setLibcallName(RTLIB::UDIV_I8, "__aeabi_uidiv");
399 setLibcallName(RTLIB::UDIV_I16, "__aeabi_uidiv");
400 setLibcallName(RTLIB::UDIV_I32, "__aeabi_uidiv");
401 setLibcallName(RTLIB::UDIV_I64, "__aeabi_uldivmod");
402 setLibcallCallingConv(RTLIB::SDIV_I8, CallingConv::ARM_AAPCS);
403 setLibcallCallingConv(RTLIB::SDIV_I16, CallingConv::ARM_AAPCS);
404 setLibcallCallingConv(RTLIB::SDIV_I32, CallingConv::ARM_AAPCS);
405 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::ARM_AAPCS);
406 setLibcallCallingConv(RTLIB::UDIV_I8, CallingConv::ARM_AAPCS);
407 setLibcallCallingConv(RTLIB::UDIV_I16, CallingConv::ARM_AAPCS);
408 setLibcallCallingConv(RTLIB::UDIV_I32, CallingConv::ARM_AAPCS);
409 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::ARM_AAPCS);
412 // RTABI chapter 4.3.4
413 setLibcallName(RTLIB::MEMCPY, "__aeabi_memcpy");
414 setLibcallName(RTLIB::MEMMOVE, "__aeabi_memmove");
415 setLibcallName(RTLIB::MEMSET, "__aeabi_memset");
416 setLibcallCallingConv(RTLIB::MEMCPY, CallingConv::ARM_AAPCS);
417 setLibcallCallingConv(RTLIB::MEMMOVE, CallingConv::ARM_AAPCS);
418 setLibcallCallingConv(RTLIB::MEMSET, CallingConv::ARM_AAPCS);
421 // Use divmod compiler-rt calls for iOS 5.0 and later.
422 if (Subtarget->getTargetTriple().isiOS() &&
423 !Subtarget->getTargetTriple().isOSVersionLT(5, 0)) {
424 setLibcallName(RTLIB::SDIVREM_I32, "__divmodsi4");
425 setLibcallName(RTLIB::UDIVREM_I32, "__udivmodsi4");
428 if (Subtarget->isThumb1Only())
429 addRegisterClass(MVT::i32, &ARM::tGPRRegClass);
431 addRegisterClass(MVT::i32, &ARM::GPRRegClass);
432 if (!TM.Options.UseSoftFloat && Subtarget->hasVFP2() &&
433 !Subtarget->isThumb1Only()) {
434 addRegisterClass(MVT::f32, &ARM::SPRRegClass);
435 if (!Subtarget->isFPOnlySP())
436 addRegisterClass(MVT::f64, &ARM::DPRRegClass);
438 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
441 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
442 VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
443 for (unsigned InnerVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
444 InnerVT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
445 setTruncStoreAction((MVT::SimpleValueType)VT,
446 (MVT::SimpleValueType)InnerVT, Expand);
447 setLoadExtAction(ISD::SEXTLOAD, (MVT::SimpleValueType)VT, Expand);
448 setLoadExtAction(ISD::ZEXTLOAD, (MVT::SimpleValueType)VT, Expand);
449 setLoadExtAction(ISD::EXTLOAD, (MVT::SimpleValueType)VT, Expand);
451 setOperationAction(ISD::MULHS, (MVT::SimpleValueType)VT, Expand);
452 setOperationAction(ISD::SMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
453 setOperationAction(ISD::MULHU, (MVT::SimpleValueType)VT, Expand);
454 setOperationAction(ISD::UMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
457 setOperationAction(ISD::ConstantFP, MVT::f32, Custom);
458 setOperationAction(ISD::ConstantFP, MVT::f64, Custom);
460 if (Subtarget->hasNEON()) {
461 addDRTypeForNEON(MVT::v2f32);
462 addDRTypeForNEON(MVT::v8i8);
463 addDRTypeForNEON(MVT::v4i16);
464 addDRTypeForNEON(MVT::v2i32);
465 addDRTypeForNEON(MVT::v1i64);
467 addQRTypeForNEON(MVT::v4f32);
468 addQRTypeForNEON(MVT::v2f64);
469 addQRTypeForNEON(MVT::v16i8);
470 addQRTypeForNEON(MVT::v8i16);
471 addQRTypeForNEON(MVT::v4i32);
472 addQRTypeForNEON(MVT::v2i64);
474 // v2f64 is legal so that QR subregs can be extracted as f64 elements, but
475 // neither Neon nor VFP support any arithmetic operations on it.
476 // The same with v4f32. But keep in mind that vadd, vsub, vmul are natively
477 // supported for v4f32.
478 setOperationAction(ISD::FADD, MVT::v2f64, Expand);
479 setOperationAction(ISD::FSUB, MVT::v2f64, Expand);
480 setOperationAction(ISD::FMUL, MVT::v2f64, Expand);
481 // FIXME: Code duplication: FDIV and FREM are expanded always, see
482 // ARMTargetLowering::addTypeForNEON method for details.
483 setOperationAction(ISD::FDIV, MVT::v2f64, Expand);
484 setOperationAction(ISD::FREM, MVT::v2f64, Expand);
485 // FIXME: Create unittest.
486 // In another words, find a way when "copysign" appears in DAG with vector
488 setOperationAction(ISD::FCOPYSIGN, MVT::v2f64, Expand);
489 // FIXME: Code duplication: SETCC has custom operation action, see
490 // ARMTargetLowering::addTypeForNEON method for details.
491 setOperationAction(ISD::SETCC, MVT::v2f64, Expand);
492 // FIXME: Create unittest for FNEG and for FABS.
493 setOperationAction(ISD::FNEG, MVT::v2f64, Expand);
494 setOperationAction(ISD::FABS, MVT::v2f64, Expand);
495 setOperationAction(ISD::FSQRT, MVT::v2f64, Expand);
496 setOperationAction(ISD::FSIN, MVT::v2f64, Expand);
497 setOperationAction(ISD::FCOS, MVT::v2f64, Expand);
498 setOperationAction(ISD::FPOWI, MVT::v2f64, Expand);
499 setOperationAction(ISD::FPOW, MVT::v2f64, Expand);
500 setOperationAction(ISD::FLOG, MVT::v2f64, Expand);
501 setOperationAction(ISD::FLOG2, MVT::v2f64, Expand);
502 setOperationAction(ISD::FLOG10, MVT::v2f64, Expand);
503 setOperationAction(ISD::FEXP, MVT::v2f64, Expand);
504 setOperationAction(ISD::FEXP2, MVT::v2f64, Expand);
505 // FIXME: Create unittest for FCEIL, FTRUNC, FRINT, FNEARBYINT, FFLOOR.
506 setOperationAction(ISD::FCEIL, MVT::v2f64, Expand);
507 setOperationAction(ISD::FTRUNC, MVT::v2f64, Expand);
508 setOperationAction(ISD::FRINT, MVT::v2f64, Expand);
509 setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Expand);
510 setOperationAction(ISD::FFLOOR, MVT::v2f64, Expand);
511 setOperationAction(ISD::FMA, MVT::v2f64, Expand);
513 setOperationAction(ISD::FSQRT, MVT::v4f32, Expand);
514 setOperationAction(ISD::FSIN, MVT::v4f32, Expand);
515 setOperationAction(ISD::FCOS, MVT::v4f32, Expand);
516 setOperationAction(ISD::FPOWI, MVT::v4f32, Expand);
517 setOperationAction(ISD::FPOW, MVT::v4f32, Expand);
518 setOperationAction(ISD::FLOG, MVT::v4f32, Expand);
519 setOperationAction(ISD::FLOG2, MVT::v4f32, Expand);
520 setOperationAction(ISD::FLOG10, MVT::v4f32, Expand);
521 setOperationAction(ISD::FEXP, MVT::v4f32, Expand);
522 setOperationAction(ISD::FEXP2, MVT::v4f32, Expand);
523 setOperationAction(ISD::FCEIL, MVT::v4f32, Expand);
524 setOperationAction(ISD::FTRUNC, MVT::v4f32, Expand);
525 setOperationAction(ISD::FRINT, MVT::v4f32, Expand);
526 setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Expand);
527 setOperationAction(ISD::FFLOOR, MVT::v4f32, Expand);
529 // Mark v2f32 intrinsics.
530 setOperationAction(ISD::FSQRT, MVT::v2f32, Expand);
531 setOperationAction(ISD::FSIN, MVT::v2f32, Expand);
532 setOperationAction(ISD::FCOS, MVT::v2f32, Expand);
533 setOperationAction(ISD::FPOWI, MVT::v2f32, Expand);
534 setOperationAction(ISD::FPOW, MVT::v2f32, Expand);
535 setOperationAction(ISD::FLOG, MVT::v2f32, Expand);
536 setOperationAction(ISD::FLOG2, MVT::v2f32, Expand);
537 setOperationAction(ISD::FLOG10, MVT::v2f32, Expand);
538 setOperationAction(ISD::FEXP, MVT::v2f32, Expand);
539 setOperationAction(ISD::FEXP2, MVT::v2f32, Expand);
540 setOperationAction(ISD::FCEIL, MVT::v2f32, Expand);
541 setOperationAction(ISD::FTRUNC, MVT::v2f32, Expand);
542 setOperationAction(ISD::FRINT, MVT::v2f32, Expand);
543 setOperationAction(ISD::FNEARBYINT, MVT::v2f32, Expand);
544 setOperationAction(ISD::FFLOOR, MVT::v2f32, Expand);
546 // Neon does not support some operations on v1i64 and v2i64 types.
547 setOperationAction(ISD::MUL, MVT::v1i64, Expand);
548 // Custom handling for some quad-vector types to detect VMULL.
549 setOperationAction(ISD::MUL, MVT::v8i16, Custom);
550 setOperationAction(ISD::MUL, MVT::v4i32, Custom);
551 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
552 // Custom handling for some vector types to avoid expensive expansions
553 setOperationAction(ISD::SDIV, MVT::v4i16, Custom);
554 setOperationAction(ISD::SDIV, MVT::v8i8, Custom);
555 setOperationAction(ISD::UDIV, MVT::v4i16, Custom);
556 setOperationAction(ISD::UDIV, MVT::v8i8, Custom);
557 setOperationAction(ISD::SETCC, MVT::v1i64, Expand);
558 setOperationAction(ISD::SETCC, MVT::v2i64, Expand);
559 // Neon does not have single instruction SINT_TO_FP and UINT_TO_FP with
560 // a destination type that is wider than the source, and nor does
561 // it have a FP_TO_[SU]INT instruction with a narrower destination than
563 setOperationAction(ISD::SINT_TO_FP, MVT::v4i16, Custom);
564 setOperationAction(ISD::UINT_TO_FP, MVT::v4i16, Custom);
565 setOperationAction(ISD::FP_TO_UINT, MVT::v4i16, Custom);
566 setOperationAction(ISD::FP_TO_SINT, MVT::v4i16, Custom);
568 setOperationAction(ISD::FP_ROUND, MVT::v2f32, Expand);
569 setOperationAction(ISD::FP_EXTEND, MVT::v2f64, Expand);
571 // NEON does not have single instruction CTPOP for vectors with element
572 // types wider than 8-bits. However, custom lowering can leverage the
573 // v8i8/v16i8 vcnt instruction.
574 setOperationAction(ISD::CTPOP, MVT::v2i32, Custom);
575 setOperationAction(ISD::CTPOP, MVT::v4i32, Custom);
576 setOperationAction(ISD::CTPOP, MVT::v4i16, Custom);
577 setOperationAction(ISD::CTPOP, MVT::v8i16, Custom);
579 // NEON only has FMA instructions as of VFP4.
580 if (!Subtarget->hasVFP4()) {
581 setOperationAction(ISD::FMA, MVT::v2f32, Expand);
582 setOperationAction(ISD::FMA, MVT::v4f32, Expand);
585 setTargetDAGCombine(ISD::INTRINSIC_VOID);
586 setTargetDAGCombine(ISD::INTRINSIC_W_CHAIN);
587 setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);
588 setTargetDAGCombine(ISD::SHL);
589 setTargetDAGCombine(ISD::SRL);
590 setTargetDAGCombine(ISD::SRA);
591 setTargetDAGCombine(ISD::SIGN_EXTEND);
592 setTargetDAGCombine(ISD::ZERO_EXTEND);
593 setTargetDAGCombine(ISD::ANY_EXTEND);
594 setTargetDAGCombine(ISD::SELECT_CC);
595 setTargetDAGCombine(ISD::BUILD_VECTOR);
596 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
597 setTargetDAGCombine(ISD::INSERT_VECTOR_ELT);
598 setTargetDAGCombine(ISD::STORE);
599 setTargetDAGCombine(ISD::FP_TO_SINT);
600 setTargetDAGCombine(ISD::FP_TO_UINT);
601 setTargetDAGCombine(ISD::FDIV);
603 // It is legal to extload from v4i8 to v4i16 or v4i32.
604 MVT Tys[6] = {MVT::v8i8, MVT::v4i8, MVT::v2i8,
605 MVT::v4i16, MVT::v2i16,
607 for (unsigned i = 0; i < 6; ++i) {
608 setLoadExtAction(ISD::EXTLOAD, Tys[i], Legal);
609 setLoadExtAction(ISD::ZEXTLOAD, Tys[i], Legal);
610 setLoadExtAction(ISD::SEXTLOAD, Tys[i], Legal);
614 // ARM and Thumb2 support UMLAL/SMLAL.
615 if (!Subtarget->isThumb1Only())
616 setTargetDAGCombine(ISD::ADDC);
619 computeRegisterProperties();
621 // ARM does not have f32 extending load.
622 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
624 // ARM does not have i1 sign extending load.
625 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
627 // ARM supports all 4 flavors of integer indexed load / store.
628 if (!Subtarget->isThumb1Only()) {
629 for (unsigned im = (unsigned)ISD::PRE_INC;
630 im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) {
631 setIndexedLoadAction(im, MVT::i1, Legal);
632 setIndexedLoadAction(im, MVT::i8, Legal);
633 setIndexedLoadAction(im, MVT::i16, Legal);
634 setIndexedLoadAction(im, MVT::i32, Legal);
635 setIndexedStoreAction(im, MVT::i1, Legal);
636 setIndexedStoreAction(im, MVT::i8, Legal);
637 setIndexedStoreAction(im, MVT::i16, Legal);
638 setIndexedStoreAction(im, MVT::i32, Legal);
642 setOperationAction(ISD::SADDO, MVT::i32, Custom);
643 setOperationAction(ISD::UADDO, MVT::i32, Custom);
644 setOperationAction(ISD::SSUBO, MVT::i32, Custom);
645 setOperationAction(ISD::USUBO, MVT::i32, Custom);
647 // i64 operation support.
648 setOperationAction(ISD::MUL, MVT::i64, Expand);
649 setOperationAction(ISD::MULHU, MVT::i32, Expand);
650 if (Subtarget->isThumb1Only()) {
651 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
652 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
654 if (Subtarget->isThumb1Only() || !Subtarget->hasV6Ops()
655 || (Subtarget->isThumb2() && !Subtarget->hasThumb2DSP()))
656 setOperationAction(ISD::MULHS, MVT::i32, Expand);
658 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
659 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
660 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
661 setOperationAction(ISD::SRL, MVT::i64, Custom);
662 setOperationAction(ISD::SRA, MVT::i64, Custom);
664 if (!Subtarget->isThumb1Only()) {
665 // FIXME: We should do this for Thumb1 as well.
666 setOperationAction(ISD::ADDC, MVT::i32, Custom);
667 setOperationAction(ISD::ADDE, MVT::i32, Custom);
668 setOperationAction(ISD::SUBC, MVT::i32, Custom);
669 setOperationAction(ISD::SUBE, MVT::i32, Custom);
672 // ARM does not have ROTL.
673 setOperationAction(ISD::ROTL, MVT::i32, Expand);
674 setOperationAction(ISD::CTTZ, MVT::i32, Custom);
675 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
676 if (!Subtarget->hasV5TOps() || Subtarget->isThumb1Only())
677 setOperationAction(ISD::CTLZ, MVT::i32, Expand);
679 // These just redirect to CTTZ and CTLZ on ARM.
680 setOperationAction(ISD::CTTZ_ZERO_UNDEF , MVT::i32 , Expand);
681 setOperationAction(ISD::CTLZ_ZERO_UNDEF , MVT::i32 , Expand);
683 setOperationAction(ISD::READCYCLECOUNTER, MVT::i64, Custom);
685 // Only ARMv6 has BSWAP.
686 if (!Subtarget->hasV6Ops())
687 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
689 if (!(Subtarget->hasDivide() && Subtarget->isThumb2()) &&
690 !(Subtarget->hasDivideInARMMode() && !Subtarget->isThumb())) {
691 // These are expanded into libcalls if the cpu doesn't have HW divider.
692 setOperationAction(ISD::SDIV, MVT::i32, Expand);
693 setOperationAction(ISD::UDIV, MVT::i32, Expand);
696 // FIXME: Also set divmod for SREM on EABI
697 setOperationAction(ISD::SREM, MVT::i32, Expand);
698 setOperationAction(ISD::UREM, MVT::i32, Expand);
699 // Register based DivRem for AEABI (RTABI 4.2)
700 if (Subtarget->isTargetAEABI()) {
701 setLibcallName(RTLIB::SDIVREM_I8, "__aeabi_idivmod");
702 setLibcallName(RTLIB::SDIVREM_I16, "__aeabi_idivmod");
703 setLibcallName(RTLIB::SDIVREM_I32, "__aeabi_idivmod");
704 setLibcallName(RTLIB::SDIVREM_I64, "__aeabi_ldivmod");
705 setLibcallName(RTLIB::UDIVREM_I8, "__aeabi_uidivmod");
706 setLibcallName(RTLIB::UDIVREM_I16, "__aeabi_uidivmod");
707 setLibcallName(RTLIB::UDIVREM_I32, "__aeabi_uidivmod");
708 setLibcallName(RTLIB::UDIVREM_I64, "__aeabi_uldivmod");
710 setLibcallCallingConv(RTLIB::SDIVREM_I8, CallingConv::ARM_AAPCS);
711 setLibcallCallingConv(RTLIB::SDIVREM_I16, CallingConv::ARM_AAPCS);
712 setLibcallCallingConv(RTLIB::SDIVREM_I32, CallingConv::ARM_AAPCS);
713 setLibcallCallingConv(RTLIB::SDIVREM_I64, CallingConv::ARM_AAPCS);
714 setLibcallCallingConv(RTLIB::UDIVREM_I8, CallingConv::ARM_AAPCS);
715 setLibcallCallingConv(RTLIB::UDIVREM_I16, CallingConv::ARM_AAPCS);
716 setLibcallCallingConv(RTLIB::UDIVREM_I32, CallingConv::ARM_AAPCS);
717 setLibcallCallingConv(RTLIB::UDIVREM_I64, CallingConv::ARM_AAPCS);
719 setOperationAction(ISD::SDIVREM, MVT::i32, Custom);
720 setOperationAction(ISD::UDIVREM, MVT::i32, Custom);
722 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
723 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
726 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
727 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
728 setOperationAction(ISD::GLOBAL_OFFSET_TABLE, MVT::i32, Custom);
729 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
730 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
732 setOperationAction(ISD::TRAP, MVT::Other, Legal);
734 // Use the default implementation.
735 setOperationAction(ISD::VASTART, MVT::Other, Custom);
736 setOperationAction(ISD::VAARG, MVT::Other, Expand);
737 setOperationAction(ISD::VACOPY, MVT::Other, Expand);
738 setOperationAction(ISD::VAEND, MVT::Other, Expand);
739 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
740 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
742 if (!Subtarget->isTargetMachO()) {
743 // Non-MachO platforms may return values in these registers via the
744 // personality function.
745 setExceptionPointerRegister(ARM::R0);
746 setExceptionSelectorRegister(ARM::R1);
749 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
750 // ARMv6 Thumb1 (except for CPUs that support dmb / dsb) and earlier use
751 // the default expansion.
752 if (Subtarget->hasAnyDataBarrier() && !Subtarget->isThumb1Only()) {
753 // ATOMIC_FENCE needs custom lowering; the others should have been expanded
754 // to ldrex/strex loops already.
755 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
757 // On v8, we have particularly efficient implementations of atomic fences
758 // if they can be combined with nearby atomic loads and stores.
759 if (!Subtarget->hasV8Ops()) {
760 // Automatically insert fences (dmb ist) around ATOMIC_SWAP etc.
761 setInsertFencesForAtomic(true);
764 // If there's anything we can use as a barrier, go through custom lowering
766 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other,
767 Subtarget->hasAnyDataBarrier() ? Custom : Expand);
769 // Set them all for expansion, which will force libcalls.
770 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Expand);
771 setOperationAction(ISD::ATOMIC_SWAP, MVT::i32, Expand);
772 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i32, Expand);
773 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i32, Expand);
774 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i32, Expand);
775 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i32, Expand);
776 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i32, Expand);
777 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i32, Expand);
778 setOperationAction(ISD::ATOMIC_LOAD_MIN, MVT::i32, Expand);
779 setOperationAction(ISD::ATOMIC_LOAD_MAX, MVT::i32, Expand);
780 setOperationAction(ISD::ATOMIC_LOAD_UMIN, MVT::i32, Expand);
781 setOperationAction(ISD::ATOMIC_LOAD_UMAX, MVT::i32, Expand);
782 // Mark ATOMIC_LOAD and ATOMIC_STORE custom so we can handle the
783 // Unordered/Monotonic case.
784 setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Custom);
785 setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Custom);
788 setOperationAction(ISD::PREFETCH, MVT::Other, Custom);
790 // Requires SXTB/SXTH, available on v6 and up in both ARM and Thumb modes.
791 if (!Subtarget->hasV6Ops()) {
792 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
793 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand);
795 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
797 if (!TM.Options.UseSoftFloat && Subtarget->hasVFP2() &&
798 !Subtarget->isThumb1Only()) {
799 // Turn f64->i64 into VMOVRRD, i64 -> f64 to VMOVDRR
800 // iff target supports vfp2.
801 setOperationAction(ISD::BITCAST, MVT::i64, Custom);
802 setOperationAction(ISD::FLT_ROUNDS_, MVT::i32, Custom);
805 // We want to custom lower some of our intrinsics.
806 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
807 if (Subtarget->isTargetDarwin()) {
808 setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
809 setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
810 setLibcallName(RTLIB::UNWIND_RESUME, "_Unwind_SjLj_Resume");
813 setOperationAction(ISD::SETCC, MVT::i32, Expand);
814 setOperationAction(ISD::SETCC, MVT::f32, Expand);
815 setOperationAction(ISD::SETCC, MVT::f64, Expand);
816 setOperationAction(ISD::SELECT, MVT::i32, Custom);
817 setOperationAction(ISD::SELECT, MVT::f32, Custom);
818 setOperationAction(ISD::SELECT, MVT::f64, Custom);
819 setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
820 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
821 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
823 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
824 setOperationAction(ISD::BR_CC, MVT::i32, Custom);
825 setOperationAction(ISD::BR_CC, MVT::f32, Custom);
826 setOperationAction(ISD::BR_CC, MVT::f64, Custom);
827 setOperationAction(ISD::BR_JT, MVT::Other, Custom);
829 // We don't support sin/cos/fmod/copysign/pow
830 setOperationAction(ISD::FSIN, MVT::f64, Expand);
831 setOperationAction(ISD::FSIN, MVT::f32, Expand);
832 setOperationAction(ISD::FCOS, MVT::f32, Expand);
833 setOperationAction(ISD::FCOS, MVT::f64, Expand);
834 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
835 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
836 setOperationAction(ISD::FREM, MVT::f64, Expand);
837 setOperationAction(ISD::FREM, MVT::f32, Expand);
838 if (!TM.Options.UseSoftFloat && Subtarget->hasVFP2() &&
839 !Subtarget->isThumb1Only()) {
840 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
841 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
843 setOperationAction(ISD::FPOW, MVT::f64, Expand);
844 setOperationAction(ISD::FPOW, MVT::f32, Expand);
846 if (!Subtarget->hasVFP4()) {
847 setOperationAction(ISD::FMA, MVT::f64, Expand);
848 setOperationAction(ISD::FMA, MVT::f32, Expand);
851 // Various VFP goodness
852 if (!TM.Options.UseSoftFloat && !Subtarget->isThumb1Only()) {
853 // int <-> fp are custom expanded into bit_convert + ARMISD ops.
854 if (Subtarget->hasVFP2()) {
855 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
856 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
857 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
858 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
860 // Special handling for half-precision FP.
861 if (!Subtarget->hasFP16()) {
862 setOperationAction(ISD::FP16_TO_FP32, MVT::f32, Expand);
863 setOperationAction(ISD::FP32_TO_FP16, MVT::i32, Expand);
867 // Combine sin / cos into one node or libcall if possible.
868 if (Subtarget->hasSinCos()) {
869 setLibcallName(RTLIB::SINCOS_F32, "sincosf");
870 setLibcallName(RTLIB::SINCOS_F64, "sincos");
871 if (Subtarget->getTargetTriple().getOS() == Triple::IOS) {
872 // For iOS, we don't want to the normal expansion of a libcall to
873 // sincos. We want to issue a libcall to __sincos_stret.
874 setOperationAction(ISD::FSINCOS, MVT::f64, Custom);
875 setOperationAction(ISD::FSINCOS, MVT::f32, Custom);
879 // We have target-specific dag combine patterns for the following nodes:
880 // ARMISD::VMOVRRD - No need to call setTargetDAGCombine
881 setTargetDAGCombine(ISD::ADD);
882 setTargetDAGCombine(ISD::SUB);
883 setTargetDAGCombine(ISD::MUL);
884 setTargetDAGCombine(ISD::AND);
885 setTargetDAGCombine(ISD::OR);
886 setTargetDAGCombine(ISD::XOR);
888 if (Subtarget->hasV6Ops())
889 setTargetDAGCombine(ISD::SRL);
891 setStackPointerRegisterToSaveRestore(ARM::SP);
893 if (TM.Options.UseSoftFloat || Subtarget->isThumb1Only() ||
894 !Subtarget->hasVFP2())
895 setSchedulingPreference(Sched::RegPressure);
897 setSchedulingPreference(Sched::Hybrid);
899 //// temporary - rewrite interface to use type
900 MaxStoresPerMemset = 8;
901 MaxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
902 MaxStoresPerMemcpy = 4; // For @llvm.memcpy -> sequence of stores
903 MaxStoresPerMemcpyOptSize = Subtarget->isTargetDarwin() ? 4 : 2;
904 MaxStoresPerMemmove = 4; // For @llvm.memmove -> sequence of stores
905 MaxStoresPerMemmoveOptSize = Subtarget->isTargetDarwin() ? 4 : 2;
907 // On ARM arguments smaller than 4 bytes are extended, so all arguments
908 // are at least 4 bytes aligned.
909 setMinStackArgumentAlignment(4);
911 // Prefer likely predicted branches to selects on out-of-order cores.
912 PredictableSelectIsExpensive = Subtarget->isLikeA9();
914 setMinFunctionAlignment(Subtarget->isThumb() ? 1 : 2);
917 // FIXME: It might make sense to define the representative register class as the
918 // nearest super-register that has a non-null superset. For example, DPR_VFP2 is
919 // a super-register of SPR, and DPR is a superset if DPR_VFP2. Consequently,
920 // SPR's representative would be DPR_VFP2. This should work well if register
921 // pressure tracking were modified such that a register use would increment the
922 // pressure of the register class's representative and all of it's super
923 // classes' representatives transitively. We have not implemented this because
924 // of the difficulty prior to coalescing of modeling operand register classes
925 // due to the common occurrence of cross class copies and subregister insertions
927 std::pair<const TargetRegisterClass*, uint8_t>
928 ARMTargetLowering::findRepresentativeClass(MVT VT) const{
929 const TargetRegisterClass *RRC = nullptr;
931 switch (VT.SimpleTy) {
933 return TargetLowering::findRepresentativeClass(VT);
934 // Use DPR as representative register class for all floating point
935 // and vector types. Since there are 32 SPR registers and 32 DPR registers so
936 // the cost is 1 for both f32 and f64.
937 case MVT::f32: case MVT::f64: case MVT::v8i8: case MVT::v4i16:
938 case MVT::v2i32: case MVT::v1i64: case MVT::v2f32:
939 RRC = &ARM::DPRRegClass;
940 // When NEON is used for SP, only half of the register file is available
941 // because operations that define both SP and DP results will be constrained
942 // to the VFP2 class (D0-D15). We currently model this constraint prior to
943 // coalescing by double-counting the SP regs. See the FIXME above.
944 if (Subtarget->useNEONForSinglePrecisionFP())
947 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
948 case MVT::v4f32: case MVT::v2f64:
949 RRC = &ARM::DPRRegClass;
953 RRC = &ARM::DPRRegClass;
957 RRC = &ARM::DPRRegClass;
961 return std::make_pair(RRC, Cost);
964 const char *ARMTargetLowering::getTargetNodeName(unsigned Opcode) const {
966 default: return nullptr;
967 case ARMISD::Wrapper: return "ARMISD::Wrapper";
968 case ARMISD::WrapperPIC: return "ARMISD::WrapperPIC";
969 case ARMISD::WrapperJT: return "ARMISD::WrapperJT";
970 case ARMISD::CALL: return "ARMISD::CALL";
971 case ARMISD::CALL_PRED: return "ARMISD::CALL_PRED";
972 case ARMISD::CALL_NOLINK: return "ARMISD::CALL_NOLINK";
973 case ARMISD::tCALL: return "ARMISD::tCALL";
974 case ARMISD::BRCOND: return "ARMISD::BRCOND";
975 case ARMISD::BR_JT: return "ARMISD::BR_JT";
976 case ARMISD::BR2_JT: return "ARMISD::BR2_JT";
977 case ARMISD::RET_FLAG: return "ARMISD::RET_FLAG";
978 case ARMISD::INTRET_FLAG: return "ARMISD::INTRET_FLAG";
979 case ARMISD::PIC_ADD: return "ARMISD::PIC_ADD";
980 case ARMISD::CMP: return "ARMISD::CMP";
981 case ARMISD::CMN: return "ARMISD::CMN";
982 case ARMISD::CMPZ: return "ARMISD::CMPZ";
983 case ARMISD::CMPFP: return "ARMISD::CMPFP";
984 case ARMISD::CMPFPw0: return "ARMISD::CMPFPw0";
985 case ARMISD::BCC_i64: return "ARMISD::BCC_i64";
986 case ARMISD::FMSTAT: return "ARMISD::FMSTAT";
988 case ARMISD::CMOV: return "ARMISD::CMOV";
990 case ARMISD::RBIT: return "ARMISD::RBIT";
992 case ARMISD::FTOSI: return "ARMISD::FTOSI";
993 case ARMISD::FTOUI: return "ARMISD::FTOUI";
994 case ARMISD::SITOF: return "ARMISD::SITOF";
995 case ARMISD::UITOF: return "ARMISD::UITOF";
997 case ARMISD::SRL_FLAG: return "ARMISD::SRL_FLAG";
998 case ARMISD::SRA_FLAG: return "ARMISD::SRA_FLAG";
999 case ARMISD::RRX: return "ARMISD::RRX";
1001 case ARMISD::ADDC: return "ARMISD::ADDC";
1002 case ARMISD::ADDE: return "ARMISD::ADDE";
1003 case ARMISD::SUBC: return "ARMISD::SUBC";
1004 case ARMISD::SUBE: return "ARMISD::SUBE";
1006 case ARMISD::VMOVRRD: return "ARMISD::VMOVRRD";
1007 case ARMISD::VMOVDRR: return "ARMISD::VMOVDRR";
1009 case ARMISD::EH_SJLJ_SETJMP: return "ARMISD::EH_SJLJ_SETJMP";
1010 case ARMISD::EH_SJLJ_LONGJMP:return "ARMISD::EH_SJLJ_LONGJMP";
1012 case ARMISD::TC_RETURN: return "ARMISD::TC_RETURN";
1014 case ARMISD::THREAD_POINTER:return "ARMISD::THREAD_POINTER";
1016 case ARMISD::DYN_ALLOC: return "ARMISD::DYN_ALLOC";
1018 case ARMISD::MEMBARRIER_MCR: return "ARMISD::MEMBARRIER_MCR";
1020 case ARMISD::PRELOAD: return "ARMISD::PRELOAD";
1022 case ARMISD::VCEQ: return "ARMISD::VCEQ";
1023 case ARMISD::VCEQZ: return "ARMISD::VCEQZ";
1024 case ARMISD::VCGE: return "ARMISD::VCGE";
1025 case ARMISD::VCGEZ: return "ARMISD::VCGEZ";
1026 case ARMISD::VCLEZ: return "ARMISD::VCLEZ";
1027 case ARMISD::VCGEU: return "ARMISD::VCGEU";
1028 case ARMISD::VCGT: return "ARMISD::VCGT";
1029 case ARMISD::VCGTZ: return "ARMISD::VCGTZ";
1030 case ARMISD::VCLTZ: return "ARMISD::VCLTZ";
1031 case ARMISD::VCGTU: return "ARMISD::VCGTU";
1032 case ARMISD::VTST: return "ARMISD::VTST";
1034 case ARMISD::VSHL: return "ARMISD::VSHL";
1035 case ARMISD::VSHRs: return "ARMISD::VSHRs";
1036 case ARMISD::VSHRu: return "ARMISD::VSHRu";
1037 case ARMISD::VRSHRs: return "ARMISD::VRSHRs";
1038 case ARMISD::VRSHRu: return "ARMISD::VRSHRu";
1039 case ARMISD::VRSHRN: return "ARMISD::VRSHRN";
1040 case ARMISD::VQSHLs: return "ARMISD::VQSHLs";
1041 case ARMISD::VQSHLu: return "ARMISD::VQSHLu";
1042 case ARMISD::VQSHLsu: return "ARMISD::VQSHLsu";
1043 case ARMISD::VQSHRNs: return "ARMISD::VQSHRNs";
1044 case ARMISD::VQSHRNu: return "ARMISD::VQSHRNu";
1045 case ARMISD::VQSHRNsu: return "ARMISD::VQSHRNsu";
1046 case ARMISD::VQRSHRNs: return "ARMISD::VQRSHRNs";
1047 case ARMISD::VQRSHRNu: return "ARMISD::VQRSHRNu";
1048 case ARMISD::VQRSHRNsu: return "ARMISD::VQRSHRNsu";
1049 case ARMISD::VGETLANEu: return "ARMISD::VGETLANEu";
1050 case ARMISD::VGETLANEs: return "ARMISD::VGETLANEs";
1051 case ARMISD::VMOVIMM: return "ARMISD::VMOVIMM";
1052 case ARMISD::VMVNIMM: return "ARMISD::VMVNIMM";
1053 case ARMISD::VMOVFPIMM: return "ARMISD::VMOVFPIMM";
1054 case ARMISD::VDUP: return "ARMISD::VDUP";
1055 case ARMISD::VDUPLANE: return "ARMISD::VDUPLANE";
1056 case ARMISD::VEXT: return "ARMISD::VEXT";
1057 case ARMISD::VREV64: return "ARMISD::VREV64";
1058 case ARMISD::VREV32: return "ARMISD::VREV32";
1059 case ARMISD::VREV16: return "ARMISD::VREV16";
1060 case ARMISD::VZIP: return "ARMISD::VZIP";
1061 case ARMISD::VUZP: return "ARMISD::VUZP";
1062 case ARMISD::VTRN: return "ARMISD::VTRN";
1063 case ARMISD::VTBL1: return "ARMISD::VTBL1";
1064 case ARMISD::VTBL2: return "ARMISD::VTBL2";
1065 case ARMISD::VMULLs: return "ARMISD::VMULLs";
1066 case ARMISD::VMULLu: return "ARMISD::VMULLu";
1067 case ARMISD::UMLAL: return "ARMISD::UMLAL";
1068 case ARMISD::SMLAL: return "ARMISD::SMLAL";
1069 case ARMISD::BUILD_VECTOR: return "ARMISD::BUILD_VECTOR";
1070 case ARMISD::FMAX: return "ARMISD::FMAX";
1071 case ARMISD::FMIN: return "ARMISD::FMIN";
1072 case ARMISD::VMAXNM: return "ARMISD::VMAX";
1073 case ARMISD::VMINNM: return "ARMISD::VMIN";
1074 case ARMISD::BFI: return "ARMISD::BFI";
1075 case ARMISD::VORRIMM: return "ARMISD::VORRIMM";
1076 case ARMISD::VBICIMM: return "ARMISD::VBICIMM";
1077 case ARMISD::VBSL: return "ARMISD::VBSL";
1078 case ARMISD::VLD2DUP: return "ARMISD::VLD2DUP";
1079 case ARMISD::VLD3DUP: return "ARMISD::VLD3DUP";
1080 case ARMISD::VLD4DUP: return "ARMISD::VLD4DUP";
1081 case ARMISD::VLD1_UPD: return "ARMISD::VLD1_UPD";
1082 case ARMISD::VLD2_UPD: return "ARMISD::VLD2_UPD";
1083 case ARMISD::VLD3_UPD: return "ARMISD::VLD3_UPD";
1084 case ARMISD::VLD4_UPD: return "ARMISD::VLD4_UPD";
1085 case ARMISD::VLD2LN_UPD: return "ARMISD::VLD2LN_UPD";
1086 case ARMISD::VLD3LN_UPD: return "ARMISD::VLD3LN_UPD";
1087 case ARMISD::VLD4LN_UPD: return "ARMISD::VLD4LN_UPD";
1088 case ARMISD::VLD2DUP_UPD: return "ARMISD::VLD2DUP_UPD";
1089 case ARMISD::VLD3DUP_UPD: return "ARMISD::VLD3DUP_UPD";
1090 case ARMISD::VLD4DUP_UPD: return "ARMISD::VLD4DUP_UPD";
1091 case ARMISD::VST1_UPD: return "ARMISD::VST1_UPD";
1092 case ARMISD::VST2_UPD: return "ARMISD::VST2_UPD";
1093 case ARMISD::VST3_UPD: return "ARMISD::VST3_UPD";
1094 case ARMISD::VST4_UPD: return "ARMISD::VST4_UPD";
1095 case ARMISD::VST2LN_UPD: return "ARMISD::VST2LN_UPD";
1096 case ARMISD::VST3LN_UPD: return "ARMISD::VST3LN_UPD";
1097 case ARMISD::VST4LN_UPD: return "ARMISD::VST4LN_UPD";
1101 EVT ARMTargetLowering::getSetCCResultType(LLVMContext &, EVT VT) const {
1102 if (!VT.isVector()) return getPointerTy();
1103 return VT.changeVectorElementTypeToInteger();
1106 /// getRegClassFor - Return the register class that should be used for the
1107 /// specified value type.
1108 const TargetRegisterClass *ARMTargetLowering::getRegClassFor(MVT VT) const {
1109 // Map v4i64 to QQ registers but do not make the type legal. Similarly map
1110 // v8i64 to QQQQ registers. v4i64 and v8i64 are only used for REG_SEQUENCE to
1111 // load / store 4 to 8 consecutive D registers.
1112 if (Subtarget->hasNEON()) {
1113 if (VT == MVT::v4i64)
1114 return &ARM::QQPRRegClass;
1115 if (VT == MVT::v8i64)
1116 return &ARM::QQQQPRRegClass;
1118 return TargetLowering::getRegClassFor(VT);
1121 // Create a fast isel object.
1123 ARMTargetLowering::createFastISel(FunctionLoweringInfo &funcInfo,
1124 const TargetLibraryInfo *libInfo) const {
1125 return ARM::createFastISel(funcInfo, libInfo);
1128 /// getMaximalGlobalOffset - Returns the maximal possible offset which can
1129 /// be used for loads / stores from the global.
1130 unsigned ARMTargetLowering::getMaximalGlobalOffset() const {
1131 return (Subtarget->isThumb1Only() ? 127 : 4095);
1134 Sched::Preference ARMTargetLowering::getSchedulingPreference(SDNode *N) const {
1135 unsigned NumVals = N->getNumValues();
1137 return Sched::RegPressure;
1139 for (unsigned i = 0; i != NumVals; ++i) {
1140 EVT VT = N->getValueType(i);
1141 if (VT == MVT::Glue || VT == MVT::Other)
1143 if (VT.isFloatingPoint() || VT.isVector())
1147 if (!N->isMachineOpcode())
1148 return Sched::RegPressure;
1150 // Load are scheduled for latency even if there instruction itinerary
1151 // is not available.
1152 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1153 const MCInstrDesc &MCID = TII->get(N->getMachineOpcode());
1155 if (MCID.getNumDefs() == 0)
1156 return Sched::RegPressure;
1157 if (!Itins->isEmpty() &&
1158 Itins->getOperandCycle(MCID.getSchedClass(), 0) > 2)
1161 return Sched::RegPressure;
1164 //===----------------------------------------------------------------------===//
1166 //===----------------------------------------------------------------------===//
1168 /// IntCCToARMCC - Convert a DAG integer condition code to an ARM CC
1169 static ARMCC::CondCodes IntCCToARMCC(ISD::CondCode CC) {
1171 default: llvm_unreachable("Unknown condition code!");
1172 case ISD::SETNE: return ARMCC::NE;
1173 case ISD::SETEQ: return ARMCC::EQ;
1174 case ISD::SETGT: return ARMCC::GT;
1175 case ISD::SETGE: return ARMCC::GE;
1176 case ISD::SETLT: return ARMCC::LT;
1177 case ISD::SETLE: return ARMCC::LE;
1178 case ISD::SETUGT: return ARMCC::HI;
1179 case ISD::SETUGE: return ARMCC::HS;
1180 case ISD::SETULT: return ARMCC::LO;
1181 case ISD::SETULE: return ARMCC::LS;
1185 /// FPCCToARMCC - Convert a DAG fp condition code to an ARM CC.
1186 static void FPCCToARMCC(ISD::CondCode CC, ARMCC::CondCodes &CondCode,
1187 ARMCC::CondCodes &CondCode2) {
1188 CondCode2 = ARMCC::AL;
1190 default: llvm_unreachable("Unknown FP condition!");
1192 case ISD::SETOEQ: CondCode = ARMCC::EQ; break;
1194 case ISD::SETOGT: CondCode = ARMCC::GT; break;
1196 case ISD::SETOGE: CondCode = ARMCC::GE; break;
1197 case ISD::SETOLT: CondCode = ARMCC::MI; break;
1198 case ISD::SETOLE: CondCode = ARMCC::LS; break;
1199 case ISD::SETONE: CondCode = ARMCC::MI; CondCode2 = ARMCC::GT; break;
1200 case ISD::SETO: CondCode = ARMCC::VC; break;
1201 case ISD::SETUO: CondCode = ARMCC::VS; break;
1202 case ISD::SETUEQ: CondCode = ARMCC::EQ; CondCode2 = ARMCC::VS; break;
1203 case ISD::SETUGT: CondCode = ARMCC::HI; break;
1204 case ISD::SETUGE: CondCode = ARMCC::PL; break;
1206 case ISD::SETULT: CondCode = ARMCC::LT; break;
1208 case ISD::SETULE: CondCode = ARMCC::LE; break;
1210 case ISD::SETUNE: CondCode = ARMCC::NE; break;
1214 //===----------------------------------------------------------------------===//
1215 // Calling Convention Implementation
1216 //===----------------------------------------------------------------------===//
1218 #include "ARMGenCallingConv.inc"
1220 /// getEffectiveCallingConv - Get the effective calling convention, taking into
1221 /// account presence of floating point hardware and calling convention
1222 /// limitations, such as support for variadic functions.
1224 ARMTargetLowering::getEffectiveCallingConv(CallingConv::ID CC,
1225 bool isVarArg) const {
1228 llvm_unreachable("Unsupported calling convention");
1229 case CallingConv::ARM_AAPCS:
1230 case CallingConv::ARM_APCS:
1231 case CallingConv::GHC:
1233 case CallingConv::ARM_AAPCS_VFP:
1234 return isVarArg ? CallingConv::ARM_AAPCS : CallingConv::ARM_AAPCS_VFP;
1235 case CallingConv::C:
1236 if (!Subtarget->isAAPCS_ABI())
1237 return CallingConv::ARM_APCS;
1238 else if (Subtarget->hasVFP2() &&
1239 getTargetMachine().Options.FloatABIType == FloatABI::Hard &&
1241 return CallingConv::ARM_AAPCS_VFP;
1243 return CallingConv::ARM_AAPCS;
1244 case CallingConv::Fast:
1245 if (!Subtarget->isAAPCS_ABI()) {
1246 if (Subtarget->hasVFP2() && !isVarArg)
1247 return CallingConv::Fast;
1248 return CallingConv::ARM_APCS;
1249 } else if (Subtarget->hasVFP2() && !isVarArg)
1250 return CallingConv::ARM_AAPCS_VFP;
1252 return CallingConv::ARM_AAPCS;
1256 /// CCAssignFnForNode - Selects the correct CCAssignFn for the given
1257 /// CallingConvention.
1258 CCAssignFn *ARMTargetLowering::CCAssignFnForNode(CallingConv::ID CC,
1260 bool isVarArg) const {
1261 switch (getEffectiveCallingConv(CC, isVarArg)) {
1263 llvm_unreachable("Unsupported calling convention");
1264 case CallingConv::ARM_APCS:
1265 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
1266 case CallingConv::ARM_AAPCS:
1267 return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
1268 case CallingConv::ARM_AAPCS_VFP:
1269 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1270 case CallingConv::Fast:
1271 return (Return ? RetFastCC_ARM_APCS : FastCC_ARM_APCS);
1272 case CallingConv::GHC:
1273 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS_GHC);
1277 /// LowerCallResult - Lower the result values of a call into the
1278 /// appropriate copies out of appropriate physical registers.
1280 ARMTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1281 CallingConv::ID CallConv, bool isVarArg,
1282 const SmallVectorImpl<ISD::InputArg> &Ins,
1283 SDLoc dl, SelectionDAG &DAG,
1284 SmallVectorImpl<SDValue> &InVals,
1285 bool isThisReturn, SDValue ThisVal) const {
1287 // Assign locations to each value returned by this call.
1288 SmallVector<CCValAssign, 16> RVLocs;
1289 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1290 getTargetMachine(), RVLocs, *DAG.getContext(), Call);
1291 CCInfo.AnalyzeCallResult(Ins,
1292 CCAssignFnForNode(CallConv, /* Return*/ true,
1295 // Copy all of the result registers out of their specified physreg.
1296 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1297 CCValAssign VA = RVLocs[i];
1299 // Pass 'this' value directly from the argument to return value, to avoid
1300 // reg unit interference
1301 if (i == 0 && isThisReturn) {
1302 assert(!VA.needsCustom() && VA.getLocVT() == MVT::i32 &&
1303 "unexpected return calling convention register assignment");
1304 InVals.push_back(ThisVal);
1309 if (VA.needsCustom()) {
1310 // Handle f64 or half of a v2f64.
1311 SDValue Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1313 Chain = Lo.getValue(1);
1314 InFlag = Lo.getValue(2);
1315 VA = RVLocs[++i]; // skip ahead to next loc
1316 SDValue Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1318 Chain = Hi.getValue(1);
1319 InFlag = Hi.getValue(2);
1320 if (!Subtarget->isLittle())
1322 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1324 if (VA.getLocVT() == MVT::v2f64) {
1325 SDValue Vec = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
1326 Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1327 DAG.getConstant(0, MVT::i32));
1329 VA = RVLocs[++i]; // skip ahead to next loc
1330 Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1331 Chain = Lo.getValue(1);
1332 InFlag = Lo.getValue(2);
1333 VA = RVLocs[++i]; // skip ahead to next loc
1334 Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1335 Chain = Hi.getValue(1);
1336 InFlag = Hi.getValue(2);
1337 if (!Subtarget->isLittle())
1339 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1340 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1341 DAG.getConstant(1, MVT::i32));
1344 Val = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), VA.getLocVT(),
1346 Chain = Val.getValue(1);
1347 InFlag = Val.getValue(2);
1350 switch (VA.getLocInfo()) {
1351 default: llvm_unreachable("Unknown loc info!");
1352 case CCValAssign::Full: break;
1353 case CCValAssign::BCvt:
1354 Val = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), Val);
1358 InVals.push_back(Val);
1364 /// LowerMemOpCallTo - Store the argument to the stack.
1366 ARMTargetLowering::LowerMemOpCallTo(SDValue Chain,
1367 SDValue StackPtr, SDValue Arg,
1368 SDLoc dl, SelectionDAG &DAG,
1369 const CCValAssign &VA,
1370 ISD::ArgFlagsTy Flags) const {
1371 unsigned LocMemOffset = VA.getLocMemOffset();
1372 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
1373 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
1374 return DAG.getStore(Chain, dl, Arg, PtrOff,
1375 MachinePointerInfo::getStack(LocMemOffset),
1379 void ARMTargetLowering::PassF64ArgInRegs(SDLoc dl, SelectionDAG &DAG,
1380 SDValue Chain, SDValue &Arg,
1381 RegsToPassVector &RegsToPass,
1382 CCValAssign &VA, CCValAssign &NextVA,
1384 SmallVectorImpl<SDValue> &MemOpChains,
1385 ISD::ArgFlagsTy Flags) const {
1387 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
1388 DAG.getVTList(MVT::i32, MVT::i32), Arg);
1389 unsigned id = Subtarget->isLittle() ? 0 : 1;
1390 RegsToPass.push_back(std::make_pair(VA.getLocReg(), fmrrd.getValue(id)));
1392 if (NextVA.isRegLoc())
1393 RegsToPass.push_back(std::make_pair(NextVA.getLocReg(), fmrrd.getValue(1-id)));
1395 assert(NextVA.isMemLoc());
1396 if (!StackPtr.getNode())
1397 StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
1399 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, fmrrd.getValue(1-id),
1405 /// LowerCall - Lowering a call into a callseq_start <-
1406 /// ARMISD:CALL <- callseq_end chain. Also add input and output parameter
1409 ARMTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
1410 SmallVectorImpl<SDValue> &InVals) const {
1411 SelectionDAG &DAG = CLI.DAG;
1413 SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs;
1414 SmallVectorImpl<SDValue> &OutVals = CLI.OutVals;
1415 SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins;
1416 SDValue Chain = CLI.Chain;
1417 SDValue Callee = CLI.Callee;
1418 bool &isTailCall = CLI.IsTailCall;
1419 CallingConv::ID CallConv = CLI.CallConv;
1420 bool doesNotRet = CLI.DoesNotReturn;
1421 bool isVarArg = CLI.IsVarArg;
1423 MachineFunction &MF = DAG.getMachineFunction();
1424 bool isStructRet = (Outs.empty()) ? false : Outs[0].Flags.isSRet();
1425 bool isThisReturn = false;
1426 bool isSibCall = false;
1428 // Disable tail calls if they're not supported.
1429 if (!Subtarget->supportsTailCall() || MF.getTarget().Options.DisableTailCalls)
1433 // Check if it's really possible to do a tail call.
1434 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
1435 isVarArg, isStructRet, MF.getFunction()->hasStructRetAttr(),
1436 Outs, OutVals, Ins, DAG);
1437 if (!isTailCall && CLI.CS && CLI.CS->isMustTailCall())
1438 report_fatal_error("failed to perform tail call elimination on a call "
1439 "site marked musttail");
1440 // We don't support GuaranteedTailCallOpt for ARM, only automatically
1441 // detected sibcalls.
1448 // Analyze operands of the call, assigning locations to each operand.
1449 SmallVector<CCValAssign, 16> ArgLocs;
1450 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1451 getTargetMachine(), ArgLocs, *DAG.getContext(), Call);
1452 CCInfo.AnalyzeCallOperands(Outs,
1453 CCAssignFnForNode(CallConv, /* Return*/ false,
1456 // Get a count of how many bytes are to be pushed on the stack.
1457 unsigned NumBytes = CCInfo.getNextStackOffset();
1459 // For tail calls, memory operands are available in our caller's stack.
1463 // Adjust the stack pointer for the new arguments...
1464 // These operations are automatically eliminated by the prolog/epilog pass
1466 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true),
1469 SDValue StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
1471 RegsToPassVector RegsToPass;
1472 SmallVector<SDValue, 8> MemOpChains;
1474 // Walk the register/memloc assignments, inserting copies/loads. In the case
1475 // of tail call optimization, arguments are handled later.
1476 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
1478 ++i, ++realArgIdx) {
1479 CCValAssign &VA = ArgLocs[i];
1480 SDValue Arg = OutVals[realArgIdx];
1481 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
1482 bool isByVal = Flags.isByVal();
1484 // Promote the value if needed.
1485 switch (VA.getLocInfo()) {
1486 default: llvm_unreachable("Unknown loc info!");
1487 case CCValAssign::Full: break;
1488 case CCValAssign::SExt:
1489 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
1491 case CCValAssign::ZExt:
1492 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
1494 case CCValAssign::AExt:
1495 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
1497 case CCValAssign::BCvt:
1498 Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg);
1502 // f64 and v2f64 might be passed in i32 pairs and must be split into pieces
1503 if (VA.needsCustom()) {
1504 if (VA.getLocVT() == MVT::v2f64) {
1505 SDValue Op0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1506 DAG.getConstant(0, MVT::i32));
1507 SDValue Op1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1508 DAG.getConstant(1, MVT::i32));
1510 PassF64ArgInRegs(dl, DAG, Chain, Op0, RegsToPass,
1511 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1513 VA = ArgLocs[++i]; // skip ahead to next loc
1514 if (VA.isRegLoc()) {
1515 PassF64ArgInRegs(dl, DAG, Chain, Op1, RegsToPass,
1516 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1518 assert(VA.isMemLoc());
1520 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Op1,
1521 dl, DAG, VA, Flags));
1524 PassF64ArgInRegs(dl, DAG, Chain, Arg, RegsToPass, VA, ArgLocs[++i],
1525 StackPtr, MemOpChains, Flags);
1527 } else if (VA.isRegLoc()) {
1528 if (realArgIdx == 0 && Flags.isReturned() && Outs[0].VT == MVT::i32) {
1529 assert(VA.getLocVT() == MVT::i32 &&
1530 "unexpected calling convention register assignment");
1531 assert(!Ins.empty() && Ins[0].VT == MVT::i32 &&
1532 "unexpected use of 'returned'");
1533 isThisReturn = true;
1535 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
1536 } else if (isByVal) {
1537 assert(VA.isMemLoc());
1538 unsigned offset = 0;
1540 // True if this byval aggregate will be split between registers
1542 unsigned ByValArgsCount = CCInfo.getInRegsParamsCount();
1543 unsigned CurByValIdx = CCInfo.getInRegsParamsProceed();
1545 if (CurByValIdx < ByValArgsCount) {
1547 unsigned RegBegin, RegEnd;
1548 CCInfo.getInRegsParamInfo(CurByValIdx, RegBegin, RegEnd);
1550 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1552 for (i = 0, j = RegBegin; j < RegEnd; i++, j++) {
1553 SDValue Const = DAG.getConstant(4*i, MVT::i32);
1554 SDValue AddArg = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, Const);
1555 SDValue Load = DAG.getLoad(PtrVT, dl, Chain, AddArg,
1556 MachinePointerInfo(),
1557 false, false, false,
1558 DAG.InferPtrAlignment(AddArg));
1559 MemOpChains.push_back(Load.getValue(1));
1560 RegsToPass.push_back(std::make_pair(j, Load));
1563 // If parameter size outsides register area, "offset" value
1564 // helps us to calculate stack slot for remained part properly.
1565 offset = RegEnd - RegBegin;
1567 CCInfo.nextInRegsParam();
1570 if (Flags.getByValSize() > 4*offset) {
1571 unsigned LocMemOffset = VA.getLocMemOffset();
1572 SDValue StkPtrOff = DAG.getIntPtrConstant(LocMemOffset);
1573 SDValue Dst = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr,
1575 SDValue SrcOffset = DAG.getIntPtrConstant(4*offset);
1576 SDValue Src = DAG.getNode(ISD::ADD, dl, getPointerTy(), Arg, SrcOffset);
1577 SDValue SizeNode = DAG.getConstant(Flags.getByValSize() - 4*offset,
1579 SDValue AlignNode = DAG.getConstant(Flags.getByValAlign(), MVT::i32);
1581 SDVTList VTs = DAG.getVTList(MVT::Other, MVT::Glue);
1582 SDValue Ops[] = { Chain, Dst, Src, SizeNode, AlignNode};
1583 MemOpChains.push_back(DAG.getNode(ARMISD::COPY_STRUCT_BYVAL, dl, VTs,
1586 } else if (!isSibCall) {
1587 assert(VA.isMemLoc());
1589 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
1590 dl, DAG, VA, Flags));
1594 if (!MemOpChains.empty())
1595 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);
1597 // Build a sequence of copy-to-reg nodes chained together with token chain
1598 // and flag operands which copy the outgoing args into the appropriate regs.
1600 // Tail call byval lowering might overwrite argument registers so in case of
1601 // tail call optimization the copies to registers are lowered later.
1603 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1604 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1605 RegsToPass[i].second, InFlag);
1606 InFlag = Chain.getValue(1);
1609 // For tail calls lower the arguments to the 'real' stack slot.
1611 // Force all the incoming stack arguments to be loaded from the stack
1612 // before any new outgoing arguments are stored to the stack, because the
1613 // outgoing stack slots may alias the incoming argument stack slots, and
1614 // the alias isn't otherwise explicit. This is slightly more conservative
1615 // than necessary, because it means that each store effectively depends
1616 // on every argument instead of just those arguments it would clobber.
1618 // Do not flag preceding copytoreg stuff together with the following stuff.
1620 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1621 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1622 RegsToPass[i].second, InFlag);
1623 InFlag = Chain.getValue(1);
1628 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
1629 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
1630 // node so that legalize doesn't hack it.
1631 bool isDirect = false;
1632 bool isARMFunc = false;
1633 bool isLocalARMFunc = false;
1634 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1636 if (EnableARMLongCalls) {
1637 assert (getTargetMachine().getRelocationModel() == Reloc::Static
1638 && "long-calls with non-static relocation model!");
1639 // Handle a global address or an external symbol. If it's not one of
1640 // those, the target's already in a register, so we don't need to do
1642 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1643 const GlobalValue *GV = G->getGlobal();
1644 // Create a constant pool entry for the callee address
1645 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1646 ARMConstantPoolValue *CPV =
1647 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue, 0);
1649 // Get the address of the callee into a register
1650 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1651 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1652 Callee = DAG.getLoad(getPointerTy(), dl,
1653 DAG.getEntryNode(), CPAddr,
1654 MachinePointerInfo::getConstantPool(),
1655 false, false, false, 0);
1656 } else if (ExternalSymbolSDNode *S=dyn_cast<ExternalSymbolSDNode>(Callee)) {
1657 const char *Sym = S->getSymbol();
1659 // Create a constant pool entry for the callee address
1660 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1661 ARMConstantPoolValue *CPV =
1662 ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym,
1663 ARMPCLabelIndex, 0);
1664 // Get the address of the callee into a register
1665 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1666 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1667 Callee = DAG.getLoad(getPointerTy(), dl,
1668 DAG.getEntryNode(), CPAddr,
1669 MachinePointerInfo::getConstantPool(),
1670 false, false, false, 0);
1672 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1673 const GlobalValue *GV = G->getGlobal();
1675 bool isExt = GV->isDeclaration() || GV->isWeakForLinker();
1676 bool isStub = (isExt && Subtarget->isTargetMachO()) &&
1677 getTargetMachine().getRelocationModel() != Reloc::Static;
1678 isARMFunc = !Subtarget->isThumb() || isStub;
1679 // ARM call to a local ARM function is predicable.
1680 isLocalARMFunc = !Subtarget->isThumb() && (!isExt || !ARMInterworking);
1681 // tBX takes a register source operand.
1682 if (isStub && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1683 assert(Subtarget->isTargetMachO() && "WrapperPIC use on non-MachO?");
1684 Callee = DAG.getNode(ARMISD::WrapperPIC, dl, getPointerTy(),
1685 DAG.getTargetGlobalAddress(GV, dl, getPointerTy()));
1687 // On ELF targets for PIC code, direct calls should go through the PLT
1688 unsigned OpFlags = 0;
1689 if (Subtarget->isTargetELF() &&
1690 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1691 OpFlags = ARMII::MO_PLT;
1692 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
1694 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
1696 bool isStub = Subtarget->isTargetMachO() &&
1697 getTargetMachine().getRelocationModel() != Reloc::Static;
1698 isARMFunc = !Subtarget->isThumb() || isStub;
1699 // tBX takes a register source operand.
1700 const char *Sym = S->getSymbol();
1701 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1702 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1703 ARMConstantPoolValue *CPV =
1704 ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym,
1705 ARMPCLabelIndex, 4);
1706 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1707 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1708 Callee = DAG.getLoad(getPointerTy(), dl,
1709 DAG.getEntryNode(), CPAddr,
1710 MachinePointerInfo::getConstantPool(),
1711 false, false, false, 0);
1712 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1713 Callee = DAG.getNode(ARMISD::PIC_ADD, dl,
1714 getPointerTy(), Callee, PICLabel);
1716 unsigned OpFlags = 0;
1717 // On ELF targets for PIC code, direct calls should go through the PLT
1718 if (Subtarget->isTargetELF() &&
1719 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1720 OpFlags = ARMII::MO_PLT;
1721 Callee = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlags);
1725 // FIXME: handle tail calls differently.
1727 bool HasMinSizeAttr = Subtarget->isMinSize();
1728 if (Subtarget->isThumb()) {
1729 if ((!isDirect || isARMFunc) && !Subtarget->hasV5TOps())
1730 CallOpc = ARMISD::CALL_NOLINK;
1732 CallOpc = isARMFunc ? ARMISD::CALL : ARMISD::tCALL;
1734 if (!isDirect && !Subtarget->hasV5TOps())
1735 CallOpc = ARMISD::CALL_NOLINK;
1736 else if (doesNotRet && isDirect && Subtarget->hasRAS() &&
1737 // Emit regular call when code size is the priority
1739 // "mov lr, pc; b _foo" to avoid confusing the RSP
1740 CallOpc = ARMISD::CALL_NOLINK;
1742 CallOpc = isLocalARMFunc ? ARMISD::CALL_PRED : ARMISD::CALL;
1745 std::vector<SDValue> Ops;
1746 Ops.push_back(Chain);
1747 Ops.push_back(Callee);
1749 // Add argument registers to the end of the list so that they are known live
1751 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
1752 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
1753 RegsToPass[i].second.getValueType()));
1755 // Add a register mask operand representing the call-preserved registers.
1757 const uint32_t *Mask;
1758 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
1759 const ARMBaseRegisterInfo *ARI = static_cast<const ARMBaseRegisterInfo*>(TRI);
1761 // For 'this' returns, use the R0-preserving mask if applicable
1762 Mask = ARI->getThisReturnPreservedMask(CallConv);
1764 // Set isThisReturn to false if the calling convention is not one that
1765 // allows 'returned' to be modeled in this way, so LowerCallResult does
1766 // not try to pass 'this' straight through
1767 isThisReturn = false;
1768 Mask = ARI->getCallPreservedMask(CallConv);
1771 Mask = ARI->getCallPreservedMask(CallConv);
1773 assert(Mask && "Missing call preserved mask for calling convention");
1774 Ops.push_back(DAG.getRegisterMask(Mask));
1777 if (InFlag.getNode())
1778 Ops.push_back(InFlag);
1780 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
1782 return DAG.getNode(ARMISD::TC_RETURN, dl, NodeTys, Ops);
1784 // Returns a chain and a flag for retval copy to use.
1785 Chain = DAG.getNode(CallOpc, dl, NodeTys, Ops);
1786 InFlag = Chain.getValue(1);
1788 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
1789 DAG.getIntPtrConstant(0, true), InFlag, dl);
1791 InFlag = Chain.getValue(1);
1793 // Handle result values, copying them out of physregs into vregs that we
1795 return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins, dl, DAG,
1796 InVals, isThisReturn,
1797 isThisReturn ? OutVals[0] : SDValue());
1800 /// HandleByVal - Every parameter *after* a byval parameter is passed
1801 /// on the stack. Remember the next parameter register to allocate,
1802 /// and then confiscate the rest of the parameter registers to insure
1805 ARMTargetLowering::HandleByVal(
1806 CCState *State, unsigned &size, unsigned Align) const {
1807 unsigned reg = State->AllocateReg(GPRArgRegs, 4);
1808 assert((State->getCallOrPrologue() == Prologue ||
1809 State->getCallOrPrologue() == Call) &&
1810 "unhandled ParmContext");
1812 if ((ARM::R0 <= reg) && (reg <= ARM::R3)) {
1813 if (Subtarget->isAAPCS_ABI() && Align > 4) {
1814 unsigned AlignInRegs = Align / 4;
1815 unsigned Waste = (ARM::R4 - reg) % AlignInRegs;
1816 for (unsigned i = 0; i < Waste; ++i)
1817 reg = State->AllocateReg(GPRArgRegs, 4);
1820 unsigned excess = 4 * (ARM::R4 - reg);
1822 // Special case when NSAA != SP and parameter size greater than size of
1823 // all remained GPR regs. In that case we can't split parameter, we must
1824 // send it to stack. We also must set NCRN to R4, so waste all
1825 // remained registers.
1826 const unsigned NSAAOffset = State->getNextStackOffset();
1827 if (Subtarget->isAAPCS_ABI() && NSAAOffset != 0 && size > excess) {
1828 while (State->AllocateReg(GPRArgRegs, 4))
1833 // First register for byval parameter is the first register that wasn't
1834 // allocated before this method call, so it would be "reg".
1835 // If parameter is small enough to be saved in range [reg, r4), then
1836 // the end (first after last) register would be reg + param-size-in-regs,
1837 // else parameter would be splitted between registers and stack,
1838 // end register would be r4 in this case.
1839 unsigned ByValRegBegin = reg;
1840 unsigned ByValRegEnd = (size < excess) ? reg + size/4 : (unsigned)ARM::R4;
1841 State->addInRegsParamInfo(ByValRegBegin, ByValRegEnd);
1842 // Note, first register is allocated in the beginning of function already,
1843 // allocate remained amount of registers we need.
1844 for (unsigned i = reg+1; i != ByValRegEnd; ++i)
1845 State->AllocateReg(GPRArgRegs, 4);
1846 // A byval parameter that is split between registers and memory needs its
1847 // size truncated here.
1848 // In the case where the entire structure fits in registers, we set the
1849 // size in memory to zero.
1858 /// MatchingStackOffset - Return true if the given stack call argument is
1859 /// already available in the same position (relatively) of the caller's
1860 /// incoming argument stack.
1862 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
1863 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
1864 const TargetInstrInfo *TII) {
1865 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
1867 if (Arg.getOpcode() == ISD::CopyFromReg) {
1868 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
1869 if (!TargetRegisterInfo::isVirtualRegister(VR))
1871 MachineInstr *Def = MRI->getVRegDef(VR);
1874 if (!Flags.isByVal()) {
1875 if (!TII->isLoadFromStackSlot(Def, FI))
1880 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
1881 if (Flags.isByVal())
1882 // ByVal argument is passed in as a pointer but it's now being
1883 // dereferenced. e.g.
1884 // define @foo(%struct.X* %A) {
1885 // tail call @bar(%struct.X* byval %A)
1888 SDValue Ptr = Ld->getBasePtr();
1889 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
1892 FI = FINode->getIndex();
1896 assert(FI != INT_MAX);
1897 if (!MFI->isFixedObjectIndex(FI))
1899 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
1902 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
1903 /// for tail call optimization. Targets which want to do tail call
1904 /// optimization should implement this function.
1906 ARMTargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
1907 CallingConv::ID CalleeCC,
1909 bool isCalleeStructRet,
1910 bool isCallerStructRet,
1911 const SmallVectorImpl<ISD::OutputArg> &Outs,
1912 const SmallVectorImpl<SDValue> &OutVals,
1913 const SmallVectorImpl<ISD::InputArg> &Ins,
1914 SelectionDAG& DAG) const {
1915 const Function *CallerF = DAG.getMachineFunction().getFunction();
1916 CallingConv::ID CallerCC = CallerF->getCallingConv();
1917 bool CCMatch = CallerCC == CalleeCC;
1919 // Look for obvious safe cases to perform tail call optimization that do not
1920 // require ABI changes. This is what gcc calls sibcall.
1922 // Do not sibcall optimize vararg calls unless the call site is not passing
1924 if (isVarArg && !Outs.empty())
1927 // Exception-handling functions need a special set of instructions to indicate
1928 // a return to the hardware. Tail-calling another function would probably
1930 if (CallerF->hasFnAttribute("interrupt"))
1933 // Also avoid sibcall optimization if either caller or callee uses struct
1934 // return semantics.
1935 if (isCalleeStructRet || isCallerStructRet)
1938 // FIXME: Completely disable sibcall for Thumb1 since Thumb1RegisterInfo::
1939 // emitEpilogue is not ready for them. Thumb tail calls also use t2B, as
1940 // the Thumb1 16-bit unconditional branch doesn't have sufficient relocation
1941 // support in the assembler and linker to be used. This would need to be
1942 // fixed to fully support tail calls in Thumb1.
1944 // Doing this is tricky, since the LDM/POP instruction on Thumb doesn't take
1945 // LR. This means if we need to reload LR, it takes an extra instructions,
1946 // which outweighs the value of the tail call; but here we don't know yet
1947 // whether LR is going to be used. Probably the right approach is to
1948 // generate the tail call here and turn it back into CALL/RET in
1949 // emitEpilogue if LR is used.
1951 // Thumb1 PIC calls to external symbols use BX, so they can be tail calls,
1952 // but we need to make sure there are enough registers; the only valid
1953 // registers are the 4 used for parameters. We don't currently do this
1955 if (Subtarget->isThumb1Only())
1958 // If the calling conventions do not match, then we'd better make sure the
1959 // results are returned in the same way as what the caller expects.
1961 SmallVector<CCValAssign, 16> RVLocs1;
1962 ARMCCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(),
1963 getTargetMachine(), RVLocs1, *DAG.getContext(), Call);
1964 CCInfo1.AnalyzeCallResult(Ins, CCAssignFnForNode(CalleeCC, true, isVarArg));
1966 SmallVector<CCValAssign, 16> RVLocs2;
1967 ARMCCState CCInfo2(CallerCC, false, DAG.getMachineFunction(),
1968 getTargetMachine(), RVLocs2, *DAG.getContext(), Call);
1969 CCInfo2.AnalyzeCallResult(Ins, CCAssignFnForNode(CallerCC, true, isVarArg));
1971 if (RVLocs1.size() != RVLocs2.size())
1973 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
1974 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
1976 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
1978 if (RVLocs1[i].isRegLoc()) {
1979 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
1982 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
1988 // If Caller's vararg or byval argument has been split between registers and
1989 // stack, do not perform tail call, since part of the argument is in caller's
1991 const ARMFunctionInfo *AFI_Caller = DAG.getMachineFunction().
1992 getInfo<ARMFunctionInfo>();
1993 if (AFI_Caller->getArgRegsSaveSize())
1996 // If the callee takes no arguments then go on to check the results of the
1998 if (!Outs.empty()) {
1999 // Check if stack adjustment is needed. For now, do not do this if any
2000 // argument is passed on the stack.
2001 SmallVector<CCValAssign, 16> ArgLocs;
2002 ARMCCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
2003 getTargetMachine(), ArgLocs, *DAG.getContext(), Call);
2004 CCInfo.AnalyzeCallOperands(Outs,
2005 CCAssignFnForNode(CalleeCC, false, isVarArg));
2006 if (CCInfo.getNextStackOffset()) {
2007 MachineFunction &MF = DAG.getMachineFunction();
2009 // Check if the arguments are already laid out in the right way as
2010 // the caller's fixed stack objects.
2011 MachineFrameInfo *MFI = MF.getFrameInfo();
2012 const MachineRegisterInfo *MRI = &MF.getRegInfo();
2013 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
2014 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
2016 ++i, ++realArgIdx) {
2017 CCValAssign &VA = ArgLocs[i];
2018 EVT RegVT = VA.getLocVT();
2019 SDValue Arg = OutVals[realArgIdx];
2020 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
2021 if (VA.getLocInfo() == CCValAssign::Indirect)
2023 if (VA.needsCustom()) {
2024 // f64 and vector types are split into multiple registers or
2025 // register/stack-slot combinations. The types will not match
2026 // the registers; give up on memory f64 refs until we figure
2027 // out what to do about this.
2030 if (!ArgLocs[++i].isRegLoc())
2032 if (RegVT == MVT::v2f64) {
2033 if (!ArgLocs[++i].isRegLoc())
2035 if (!ArgLocs[++i].isRegLoc())
2038 } else if (!VA.isRegLoc()) {
2039 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
2051 ARMTargetLowering::CanLowerReturn(CallingConv::ID CallConv,
2052 MachineFunction &MF, bool isVarArg,
2053 const SmallVectorImpl<ISD::OutputArg> &Outs,
2054 LLVMContext &Context) const {
2055 SmallVector<CCValAssign, 16> RVLocs;
2056 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(), RVLocs, Context);
2057 return CCInfo.CheckReturn(Outs, CCAssignFnForNode(CallConv, /*Return=*/true,
2061 static SDValue LowerInterruptReturn(SmallVectorImpl<SDValue> &RetOps,
2062 SDLoc DL, SelectionDAG &DAG) {
2063 const MachineFunction &MF = DAG.getMachineFunction();
2064 const Function *F = MF.getFunction();
2066 StringRef IntKind = F->getFnAttribute("interrupt").getValueAsString();
2068 // See ARM ARM v7 B1.8.3. On exception entry LR is set to a possibly offset
2069 // version of the "preferred return address". These offsets affect the return
2070 // instruction if this is a return from PL1 without hypervisor extensions.
2071 // IRQ/FIQ: +4 "subs pc, lr, #4"
2072 // SWI: 0 "subs pc, lr, #0"
2073 // ABORT: +4 "subs pc, lr, #4"
2074 // UNDEF: +4/+2 "subs pc, lr, #0"
2075 // UNDEF varies depending on where the exception came from ARM or Thumb
2076 // mode. Alongside GCC, we throw our hands up in disgust and pretend it's 0.
2079 if (IntKind == "" || IntKind == "IRQ" || IntKind == "FIQ" ||
2082 else if (IntKind == "SWI" || IntKind == "UNDEF")
2085 report_fatal_error("Unsupported interrupt attribute. If present, value "
2086 "must be one of: IRQ, FIQ, SWI, ABORT or UNDEF");
2088 RetOps.insert(RetOps.begin() + 1, DAG.getConstant(LROffset, MVT::i32, false));
2090 return DAG.getNode(ARMISD::INTRET_FLAG, DL, MVT::Other, RetOps);
2094 ARMTargetLowering::LowerReturn(SDValue Chain,
2095 CallingConv::ID CallConv, bool isVarArg,
2096 const SmallVectorImpl<ISD::OutputArg> &Outs,
2097 const SmallVectorImpl<SDValue> &OutVals,
2098 SDLoc dl, SelectionDAG &DAG) const {
2100 // CCValAssign - represent the assignment of the return value to a location.
2101 SmallVector<CCValAssign, 16> RVLocs;
2103 // CCState - Info about the registers and stack slots.
2104 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2105 getTargetMachine(), RVLocs, *DAG.getContext(), Call);
2107 // Analyze outgoing return values.
2108 CCInfo.AnalyzeReturn(Outs, CCAssignFnForNode(CallConv, /* Return */ true,
2112 SmallVector<SDValue, 4> RetOps;
2113 RetOps.push_back(Chain); // Operand #0 = Chain (updated below)
2114 bool isLittleEndian = Subtarget->isLittle();
2116 // Copy the result values into the output registers.
2117 for (unsigned i = 0, realRVLocIdx = 0;
2119 ++i, ++realRVLocIdx) {
2120 CCValAssign &VA = RVLocs[i];
2121 assert(VA.isRegLoc() && "Can only return in registers!");
2123 SDValue Arg = OutVals[realRVLocIdx];
2125 switch (VA.getLocInfo()) {
2126 default: llvm_unreachable("Unknown loc info!");
2127 case CCValAssign::Full: break;
2128 case CCValAssign::BCvt:
2129 Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg);
2133 if (VA.needsCustom()) {
2134 if (VA.getLocVT() == MVT::v2f64) {
2135 // Extract the first half and return it in two registers.
2136 SDValue Half = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
2137 DAG.getConstant(0, MVT::i32));
2138 SDValue HalfGPRs = DAG.getNode(ARMISD::VMOVRRD, dl,
2139 DAG.getVTList(MVT::i32, MVT::i32), Half);
2141 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
2142 HalfGPRs.getValue(isLittleEndian ? 0 : 1),
2144 Flag = Chain.getValue(1);
2145 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
2146 VA = RVLocs[++i]; // skip ahead to next loc
2147 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
2148 HalfGPRs.getValue(isLittleEndian ? 1 : 0),
2150 Flag = Chain.getValue(1);
2151 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
2152 VA = RVLocs[++i]; // skip ahead to next loc
2154 // Extract the 2nd half and fall through to handle it as an f64 value.
2155 Arg = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
2156 DAG.getConstant(1, MVT::i32));
2158 // Legalize ret f64 -> ret 2 x i32. We always have fmrrd if f64 is
2160 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
2161 DAG.getVTList(MVT::i32, MVT::i32), Arg);
2162 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
2163 fmrrd.getValue(isLittleEndian ? 0 : 1),
2165 Flag = Chain.getValue(1);
2166 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
2167 VA = RVLocs[++i]; // skip ahead to next loc
2168 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
2169 fmrrd.getValue(isLittleEndian ? 1 : 0),
2172 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), Arg, Flag);
2174 // Guarantee that all emitted copies are
2175 // stuck together, avoiding something bad.
2176 Flag = Chain.getValue(1);
2177 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
2180 // Update chain and glue.
2183 RetOps.push_back(Flag);
2185 // CPUs which aren't M-class use a special sequence to return from
2186 // exceptions (roughly, any instruction setting pc and cpsr simultaneously,
2187 // though we use "subs pc, lr, #N").
2189 // M-class CPUs actually use a normal return sequence with a special
2190 // (hardware-provided) value in LR, so the normal code path works.
2191 if (DAG.getMachineFunction().getFunction()->hasFnAttribute("interrupt") &&
2192 !Subtarget->isMClass()) {
2193 if (Subtarget->isThumb1Only())
2194 report_fatal_error("interrupt attribute is not supported in Thumb1");
2195 return LowerInterruptReturn(RetOps, dl, DAG);
2198 return DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, RetOps);
2201 bool ARMTargetLowering::isUsedByReturnOnly(SDNode *N, SDValue &Chain) const {
2202 if (N->getNumValues() != 1)
2204 if (!N->hasNUsesOfValue(1, 0))
2207 SDValue TCChain = Chain;
2208 SDNode *Copy = *N->use_begin();
2209 if (Copy->getOpcode() == ISD::CopyToReg) {
2210 // If the copy has a glue operand, we conservatively assume it isn't safe to
2211 // perform a tail call.
2212 if (Copy->getOperand(Copy->getNumOperands()-1).getValueType() == MVT::Glue)
2214 TCChain = Copy->getOperand(0);
2215 } else if (Copy->getOpcode() == ARMISD::VMOVRRD) {
2216 SDNode *VMov = Copy;
2217 // f64 returned in a pair of GPRs.
2218 SmallPtrSet<SDNode*, 2> Copies;
2219 for (SDNode::use_iterator UI = VMov->use_begin(), UE = VMov->use_end();
2221 if (UI->getOpcode() != ISD::CopyToReg)
2225 if (Copies.size() > 2)
2228 for (SDNode::use_iterator UI = VMov->use_begin(), UE = VMov->use_end();
2230 SDValue UseChain = UI->getOperand(0);
2231 if (Copies.count(UseChain.getNode()))
2238 } else if (Copy->getOpcode() == ISD::BITCAST) {
2239 // f32 returned in a single GPR.
2240 if (!Copy->hasOneUse())
2242 Copy = *Copy->use_begin();
2243 if (Copy->getOpcode() != ISD::CopyToReg || !Copy->hasNUsesOfValue(1, 0))
2245 TCChain = Copy->getOperand(0);
2250 bool HasRet = false;
2251 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
2253 if (UI->getOpcode() != ARMISD::RET_FLAG &&
2254 UI->getOpcode() != ARMISD::INTRET_FLAG)
2266 bool ARMTargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
2267 if (!Subtarget->supportsTailCall())
2270 if (!CI->isTailCall() || getTargetMachine().Options.DisableTailCalls)
2273 return !Subtarget->isThumb1Only();
2276 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
2277 // their target counterpart wrapped in the ARMISD::Wrapper node. Suppose N is
2278 // one of the above mentioned nodes. It has to be wrapped because otherwise
2279 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
2280 // be used to form addressing mode. These wrapped nodes will be selected
2282 static SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) {
2283 EVT PtrVT = Op.getValueType();
2284 // FIXME there is no actual debug info here
2286 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
2288 if (CP->isMachineConstantPoolEntry())
2289 Res = DAG.getTargetConstantPool(CP->getMachineCPVal(), PtrVT,
2290 CP->getAlignment());
2292 Res = DAG.getTargetConstantPool(CP->getConstVal(), PtrVT,
2293 CP->getAlignment());
2294 return DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Res);
2297 unsigned ARMTargetLowering::getJumpTableEncoding() const {
2298 return MachineJumpTableInfo::EK_Inline;
2301 SDValue ARMTargetLowering::LowerBlockAddress(SDValue Op,
2302 SelectionDAG &DAG) const {
2303 MachineFunction &MF = DAG.getMachineFunction();
2304 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2305 unsigned ARMPCLabelIndex = 0;
2307 EVT PtrVT = getPointerTy();
2308 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
2309 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2311 if (RelocM == Reloc::Static) {
2312 CPAddr = DAG.getTargetConstantPool(BA, PtrVT, 4);
2314 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
2315 ARMPCLabelIndex = AFI->createPICLabelUId();
2316 ARMConstantPoolValue *CPV =
2317 ARMConstantPoolConstant::Create(BA, ARMPCLabelIndex,
2318 ARMCP::CPBlockAddress, PCAdj);
2319 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2321 CPAddr = DAG.getNode(ARMISD::Wrapper, DL, PtrVT, CPAddr);
2322 SDValue Result = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), CPAddr,
2323 MachinePointerInfo::getConstantPool(),
2324 false, false, false, 0);
2325 if (RelocM == Reloc::Static)
2327 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2328 return DAG.getNode(ARMISD::PIC_ADD, DL, PtrVT, Result, PICLabel);
2331 // Lower ISD::GlobalTLSAddress using the "general dynamic" model
2333 ARMTargetLowering::LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA,
2334 SelectionDAG &DAG) const {
2336 EVT PtrVT = getPointerTy();
2337 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
2338 MachineFunction &MF = DAG.getMachineFunction();
2339 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2340 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2341 ARMConstantPoolValue *CPV =
2342 ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex,
2343 ARMCP::CPValue, PCAdj, ARMCP::TLSGD, true);
2344 SDValue Argument = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2345 Argument = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Argument);
2346 Argument = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Argument,
2347 MachinePointerInfo::getConstantPool(),
2348 false, false, false, 0);
2349 SDValue Chain = Argument.getValue(1);
2351 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2352 Argument = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Argument, PICLabel);
2354 // call __tls_get_addr.
2357 Entry.Node = Argument;
2358 Entry.Ty = (Type *) Type::getInt32Ty(*DAG.getContext());
2359 Args.push_back(Entry);
2360 // FIXME: is there useful debug info available here?
2361 TargetLowering::CallLoweringInfo CLI(Chain,
2362 (Type *) Type::getInt32Ty(*DAG.getContext()),
2363 false, false, false, false,
2364 0, CallingConv::C, /*isTailCall=*/false,
2365 /*doesNotRet=*/false, /*isReturnValueUsed=*/true,
2366 DAG.getExternalSymbol("__tls_get_addr", PtrVT), Args, DAG, dl);
2367 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
2368 return CallResult.first;
2371 // Lower ISD::GlobalTLSAddress using the "initial exec" or
2372 // "local exec" model.
2374 ARMTargetLowering::LowerToTLSExecModels(GlobalAddressSDNode *GA,
2376 TLSModel::Model model) const {
2377 const GlobalValue *GV = GA->getGlobal();
2380 SDValue Chain = DAG.getEntryNode();
2381 EVT PtrVT = getPointerTy();
2382 // Get the Thread Pointer
2383 SDValue ThreadPointer = DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
2385 if (model == TLSModel::InitialExec) {
2386 MachineFunction &MF = DAG.getMachineFunction();
2387 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2388 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2389 // Initial exec model.
2390 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
2391 ARMConstantPoolValue *CPV =
2392 ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex,
2393 ARMCP::CPValue, PCAdj, ARMCP::GOTTPOFF,
2395 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2396 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
2397 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2398 MachinePointerInfo::getConstantPool(),
2399 false, false, false, 0);
2400 Chain = Offset.getValue(1);
2402 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2403 Offset = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Offset, PICLabel);
2405 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2406 MachinePointerInfo::getConstantPool(),
2407 false, false, false, 0);
2410 assert(model == TLSModel::LocalExec);
2411 ARMConstantPoolValue *CPV =
2412 ARMConstantPoolConstant::Create(GV, ARMCP::TPOFF);
2413 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2414 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
2415 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2416 MachinePointerInfo::getConstantPool(),
2417 false, false, false, 0);
2420 // The address of the thread local variable is the add of the thread
2421 // pointer with the offset of the variable.
2422 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
2426 ARMTargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
2427 // TODO: implement the "local dynamic" model
2428 assert(Subtarget->isTargetELF() &&
2429 "TLS not implemented for non-ELF targets");
2430 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
2432 TLSModel::Model model = getTargetMachine().getTLSModel(GA->getGlobal());
2435 case TLSModel::GeneralDynamic:
2436 case TLSModel::LocalDynamic:
2437 return LowerToTLSGeneralDynamicModel(GA, DAG);
2438 case TLSModel::InitialExec:
2439 case TLSModel::LocalExec:
2440 return LowerToTLSExecModels(GA, DAG, model);
2442 llvm_unreachable("bogus TLS model");
2445 SDValue ARMTargetLowering::LowerGlobalAddressELF(SDValue Op,
2446 SelectionDAG &DAG) const {
2447 EVT PtrVT = getPointerTy();
2449 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2450 if (getTargetMachine().getRelocationModel() == Reloc::PIC_) {
2451 bool UseGOTOFF = GV->hasLocalLinkage() || GV->hasHiddenVisibility();
2452 ARMConstantPoolValue *CPV =
2453 ARMConstantPoolConstant::Create(GV,
2454 UseGOTOFF ? ARMCP::GOTOFF : ARMCP::GOT);
2455 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2456 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2457 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
2459 MachinePointerInfo::getConstantPool(),
2460 false, false, false, 0);
2461 SDValue Chain = Result.getValue(1);
2462 SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(PtrVT);
2463 Result = DAG.getNode(ISD::ADD, dl, PtrVT, Result, GOT);
2465 Result = DAG.getLoad(PtrVT, dl, Chain, Result,
2466 MachinePointerInfo::getGOT(),
2467 false, false, false, 0);
2471 // If we have T2 ops, we can materialize the address directly via movt/movw
2472 // pair. This is always cheaper.
2473 if (Subtarget->useMovt()) {
2475 // FIXME: Once remat is capable of dealing with instructions with register
2476 // operands, expand this into two nodes.
2477 return DAG.getNode(ARMISD::Wrapper, dl, PtrVT,
2478 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2480 SDValue CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
2481 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2482 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2483 MachinePointerInfo::getConstantPool(),
2484 false, false, false, 0);
2488 SDValue ARMTargetLowering::LowerGlobalAddressDarwin(SDValue Op,
2489 SelectionDAG &DAG) const {
2490 EVT PtrVT = getPointerTy();
2492 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2493 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2495 if (Subtarget->useMovt())
2498 // FIXME: Once remat is capable of dealing with instructions with register
2499 // operands, expand this into multiple nodes
2501 RelocM == Reloc::PIC_ ? ARMISD::WrapperPIC : ARMISD::Wrapper;
2503 SDValue G = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, ARMII::MO_NONLAZY);
2504 SDValue Result = DAG.getNode(Wrapper, dl, PtrVT, G);
2506 if (Subtarget->GVIsIndirectSymbol(GV, RelocM))
2507 Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Result,
2508 MachinePointerInfo::getGOT(), false, false, false, 0);
2512 SDValue ARMTargetLowering::LowerGlobalAddressWindows(SDValue Op,
2513 SelectionDAG &DAG) const {
2514 assert(Subtarget->isTargetWindows() && "non-Windows COFF is not supported");
2515 assert(Subtarget->useMovt() && "Windows on ARM expects to use movw/movt");
2517 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2518 EVT PtrVT = getPointerTy();
2523 // FIXME: Once remat is capable of dealing with instructions with register
2524 // operands, expand this into two nodes.
2525 return DAG.getNode(ARMISD::Wrapper, DL, PtrVT,
2526 DAG.getTargetGlobalAddress(GV, DL, PtrVT));
2529 SDValue ARMTargetLowering::LowerGLOBAL_OFFSET_TABLE(SDValue Op,
2530 SelectionDAG &DAG) const {
2531 assert(Subtarget->isTargetELF() &&
2532 "GLOBAL OFFSET TABLE not implemented for non-ELF targets");
2533 MachineFunction &MF = DAG.getMachineFunction();
2534 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2535 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2536 EVT PtrVT = getPointerTy();
2538 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
2539 ARMConstantPoolValue *CPV =
2540 ARMConstantPoolSymbol::Create(*DAG.getContext(), "_GLOBAL_OFFSET_TABLE_",
2541 ARMPCLabelIndex, PCAdj);
2542 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2543 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2544 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2545 MachinePointerInfo::getConstantPool(),
2546 false, false, false, 0);
2547 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2548 return DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2552 ARMTargetLowering::LowerEH_SJLJ_SETJMP(SDValue Op, SelectionDAG &DAG) const {
2554 SDValue Val = DAG.getConstant(0, MVT::i32);
2555 return DAG.getNode(ARMISD::EH_SJLJ_SETJMP, dl,
2556 DAG.getVTList(MVT::i32, MVT::Other), Op.getOperand(0),
2557 Op.getOperand(1), Val);
2561 ARMTargetLowering::LowerEH_SJLJ_LONGJMP(SDValue Op, SelectionDAG &DAG) const {
2563 return DAG.getNode(ARMISD::EH_SJLJ_LONGJMP, dl, MVT::Other, Op.getOperand(0),
2564 Op.getOperand(1), DAG.getConstant(0, MVT::i32));
2568 ARMTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG,
2569 const ARMSubtarget *Subtarget) const {
2570 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
2573 default: return SDValue(); // Don't custom lower most intrinsics.
2574 case Intrinsic::arm_thread_pointer: {
2575 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2576 return DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
2578 case Intrinsic::eh_sjlj_lsda: {
2579 MachineFunction &MF = DAG.getMachineFunction();
2580 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2581 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2582 EVT PtrVT = getPointerTy();
2583 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2585 unsigned PCAdj = (RelocM != Reloc::PIC_)
2586 ? 0 : (Subtarget->isThumb() ? 4 : 8);
2587 ARMConstantPoolValue *CPV =
2588 ARMConstantPoolConstant::Create(MF.getFunction(), ARMPCLabelIndex,
2589 ARMCP::CPLSDA, PCAdj);
2590 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2591 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2593 DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2594 MachinePointerInfo::getConstantPool(),
2595 false, false, false, 0);
2597 if (RelocM == Reloc::PIC_) {
2598 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2599 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2603 case Intrinsic::arm_neon_vmulls:
2604 case Intrinsic::arm_neon_vmullu: {
2605 unsigned NewOpc = (IntNo == Intrinsic::arm_neon_vmulls)
2606 ? ARMISD::VMULLs : ARMISD::VMULLu;
2607 return DAG.getNode(NewOpc, SDLoc(Op), Op.getValueType(),
2608 Op.getOperand(1), Op.getOperand(2));
2613 static SDValue LowerATOMIC_FENCE(SDValue Op, SelectionDAG &DAG,
2614 const ARMSubtarget *Subtarget) {
2615 // FIXME: handle "fence singlethread" more efficiently.
2617 if (!Subtarget->hasDataBarrier()) {
2618 // Some ARMv6 cpus can support data barriers with an mcr instruction.
2619 // Thumb1 and pre-v6 ARM mode use a libcall instead and should never get
2621 assert(Subtarget->hasV6Ops() && !Subtarget->isThumb() &&
2622 "Unexpected ISD::ATOMIC_FENCE encountered. Should be libcall!");
2623 return DAG.getNode(ARMISD::MEMBARRIER_MCR, dl, MVT::Other, Op.getOperand(0),
2624 DAG.getConstant(0, MVT::i32));
2627 ConstantSDNode *OrdN = cast<ConstantSDNode>(Op.getOperand(1));
2628 AtomicOrdering Ord = static_cast<AtomicOrdering>(OrdN->getZExtValue());
2629 unsigned Domain = ARM_MB::ISH;
2630 if (Subtarget->isMClass()) {
2631 // Only a full system barrier exists in the M-class architectures.
2632 Domain = ARM_MB::SY;
2633 } else if (Subtarget->isSwift() && Ord == Release) {
2634 // Swift happens to implement ISHST barriers in a way that's compatible with
2635 // Release semantics but weaker than ISH so we'd be fools not to use
2636 // it. Beware: other processors probably don't!
2637 Domain = ARM_MB::ISHST;
2640 return DAG.getNode(ISD::INTRINSIC_VOID, dl, MVT::Other, Op.getOperand(0),
2641 DAG.getConstant(Intrinsic::arm_dmb, MVT::i32),
2642 DAG.getConstant(Domain, MVT::i32));
2645 static SDValue LowerPREFETCH(SDValue Op, SelectionDAG &DAG,
2646 const ARMSubtarget *Subtarget) {
2647 // ARM pre v5TE and Thumb1 does not have preload instructions.
2648 if (!(Subtarget->isThumb2() ||
2649 (!Subtarget->isThumb1Only() && Subtarget->hasV5TEOps())))
2650 // Just preserve the chain.
2651 return Op.getOperand(0);
2654 unsigned isRead = ~cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue() & 1;
2656 (!Subtarget->hasV7Ops() || !Subtarget->hasMPExtension()))
2657 // ARMv7 with MP extension has PLDW.
2658 return Op.getOperand(0);
2660 unsigned isData = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
2661 if (Subtarget->isThumb()) {
2663 isRead = ~isRead & 1;
2664 isData = ~isData & 1;
2667 return DAG.getNode(ARMISD::PRELOAD, dl, MVT::Other, Op.getOperand(0),
2668 Op.getOperand(1), DAG.getConstant(isRead, MVT::i32),
2669 DAG.getConstant(isData, MVT::i32));
2672 static SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) {
2673 MachineFunction &MF = DAG.getMachineFunction();
2674 ARMFunctionInfo *FuncInfo = MF.getInfo<ARMFunctionInfo>();
2676 // vastart just stores the address of the VarArgsFrameIndex slot into the
2677 // memory location argument.
2679 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2680 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
2681 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
2682 return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1),
2683 MachinePointerInfo(SV), false, false, 0);
2687 ARMTargetLowering::GetF64FormalArgument(CCValAssign &VA, CCValAssign &NextVA,
2688 SDValue &Root, SelectionDAG &DAG,
2690 MachineFunction &MF = DAG.getMachineFunction();
2691 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2693 const TargetRegisterClass *RC;
2694 if (AFI->isThumb1OnlyFunction())
2695 RC = &ARM::tGPRRegClass;
2697 RC = &ARM::GPRRegClass;
2699 // Transform the arguments stored in physical registers into virtual ones.
2700 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2701 SDValue ArgValue = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2704 if (NextVA.isMemLoc()) {
2705 MachineFrameInfo *MFI = MF.getFrameInfo();
2706 int FI = MFI->CreateFixedObject(4, NextVA.getLocMemOffset(), true);
2708 // Create load node to retrieve arguments from the stack.
2709 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2710 ArgValue2 = DAG.getLoad(MVT::i32, dl, Root, FIN,
2711 MachinePointerInfo::getFixedStack(FI),
2712 false, false, false, 0);
2714 Reg = MF.addLiveIn(NextVA.getLocReg(), RC);
2715 ArgValue2 = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2717 if (!Subtarget->isLittle())
2718 std::swap (ArgValue, ArgValue2);
2719 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, ArgValue, ArgValue2);
2723 ARMTargetLowering::computeRegArea(CCState &CCInfo, MachineFunction &MF,
2724 unsigned InRegsParamRecordIdx,
2726 unsigned &ArgRegsSize,
2727 unsigned &ArgRegsSaveSize)
2730 if (InRegsParamRecordIdx < CCInfo.getInRegsParamsCount()) {
2731 unsigned RBegin, REnd;
2732 CCInfo.getInRegsParamInfo(InRegsParamRecordIdx, RBegin, REnd);
2733 NumGPRs = REnd - RBegin;
2735 unsigned int firstUnalloced;
2736 firstUnalloced = CCInfo.getFirstUnallocated(GPRArgRegs,
2737 sizeof(GPRArgRegs) /
2738 sizeof(GPRArgRegs[0]));
2739 NumGPRs = (firstUnalloced <= 3) ? (4 - firstUnalloced) : 0;
2742 unsigned Align = MF.getTarget().getFrameLowering()->getStackAlignment();
2743 ArgRegsSize = NumGPRs * 4;
2745 // If parameter is split between stack and GPRs...
2746 if (NumGPRs && Align > 4 &&
2747 (ArgRegsSize < ArgSize ||
2748 InRegsParamRecordIdx >= CCInfo.getInRegsParamsCount())) {
2749 // Add padding for part of param recovered from GPRs. For example,
2750 // if Align == 8, its last byte must be at address K*8 - 1.
2751 // We need to do it, since remained (stack) part of parameter has
2752 // stack alignment, and we need to "attach" "GPRs head" without gaps
2755 // |---- 8 bytes block ----| |---- 8 bytes block ----| |---- 8 bytes...
2756 // [ [padding] [GPRs head] ] [ Tail passed via stack ....
2758 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2760 OffsetToAlignment(ArgRegsSize + AFI->getArgRegsSaveSize(), Align);
2761 ArgRegsSaveSize = ArgRegsSize + Padding;
2763 // We don't need to extend regs save size for byval parameters if they
2764 // are passed via GPRs only.
2765 ArgRegsSaveSize = ArgRegsSize;
2768 // The remaining GPRs hold either the beginning of variable-argument
2769 // data, or the beginning of an aggregate passed by value (usually
2770 // byval). Either way, we allocate stack slots adjacent to the data
2771 // provided by our caller, and store the unallocated registers there.
2772 // If this is a variadic function, the va_list pointer will begin with
2773 // these values; otherwise, this reassembles a (byval) structure that
2774 // was split between registers and memory.
2775 // Return: The frame index registers were stored into.
2777 ARMTargetLowering::StoreByValRegs(CCState &CCInfo, SelectionDAG &DAG,
2778 SDLoc dl, SDValue &Chain,
2779 const Value *OrigArg,
2780 unsigned InRegsParamRecordIdx,
2781 unsigned OffsetFromOrigArg,
2785 unsigned ByValStoreOffset,
2786 unsigned TotalArgRegsSaveSize) const {
2788 // Currently, two use-cases possible:
2789 // Case #1. Non-var-args function, and we meet first byval parameter.
2790 // Setup first unallocated register as first byval register;
2791 // eat all remained registers
2792 // (these two actions are performed by HandleByVal method).
2793 // Then, here, we initialize stack frame with
2794 // "store-reg" instructions.
2795 // Case #2. Var-args function, that doesn't contain byval parameters.
2796 // The same: eat all remained unallocated registers,
2797 // initialize stack frame.
2799 MachineFunction &MF = DAG.getMachineFunction();
2800 MachineFrameInfo *MFI = MF.getFrameInfo();
2801 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2802 unsigned firstRegToSaveIndex, lastRegToSaveIndex;
2803 unsigned RBegin, REnd;
2804 if (InRegsParamRecordIdx < CCInfo.getInRegsParamsCount()) {
2805 CCInfo.getInRegsParamInfo(InRegsParamRecordIdx, RBegin, REnd);
2806 firstRegToSaveIndex = RBegin - ARM::R0;
2807 lastRegToSaveIndex = REnd - ARM::R0;
2809 firstRegToSaveIndex = CCInfo.getFirstUnallocated
2810 (GPRArgRegs, array_lengthof(GPRArgRegs));
2811 lastRegToSaveIndex = 4;
2814 unsigned ArgRegsSize, ArgRegsSaveSize;
2815 computeRegArea(CCInfo, MF, InRegsParamRecordIdx, ArgSize,
2816 ArgRegsSize, ArgRegsSaveSize);
2818 // Store any by-val regs to their spots on the stack so that they may be
2819 // loaded by deferencing the result of formal parameter pointer or va_next.
2820 // Note: once stack area for byval/varargs registers
2821 // was initialized, it can't be initialized again.
2822 if (ArgRegsSaveSize) {
2823 unsigned Padding = ArgRegsSaveSize - ArgRegsSize;
2826 assert(AFI->getStoredByValParamsPadding() == 0 &&
2827 "The only parameter may be padded.");
2828 AFI->setStoredByValParamsPadding(Padding);
2831 int FrameIndex = MFI->CreateFixedObject(ArgRegsSaveSize,
2834 (int64_t)TotalArgRegsSaveSize,
2836 SDValue FIN = DAG.getFrameIndex(FrameIndex, getPointerTy());
2838 MFI->CreateFixedObject(Padding,
2839 ArgOffset + ByValStoreOffset -
2840 (int64_t)ArgRegsSaveSize,
2844 SmallVector<SDValue, 4> MemOps;
2845 for (unsigned i = 0; firstRegToSaveIndex < lastRegToSaveIndex;
2846 ++firstRegToSaveIndex, ++i) {
2847 const TargetRegisterClass *RC;
2848 if (AFI->isThumb1OnlyFunction())
2849 RC = &ARM::tGPRRegClass;
2851 RC = &ARM::GPRRegClass;
2853 unsigned VReg = MF.addLiveIn(GPRArgRegs[firstRegToSaveIndex], RC);
2854 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
2856 DAG.getStore(Val.getValue(1), dl, Val, FIN,
2857 MachinePointerInfo(OrigArg, OffsetFromOrigArg + 4*i),
2859 MemOps.push_back(Store);
2860 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), FIN,
2861 DAG.getConstant(4, getPointerTy()));
2864 AFI->setArgRegsSaveSize(ArgRegsSaveSize + AFI->getArgRegsSaveSize());
2866 if (!MemOps.empty())
2867 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps);
2871 // We cannot allocate a zero-byte object for the first variadic argument,
2872 // so just make up a size.
2875 // This will point to the next argument passed via stack.
2876 return MFI->CreateFixedObject(
2877 ArgSize, ArgOffset, !ForceMutable);
2881 // Setup stack frame, the va_list pointer will start from.
2883 ARMTargetLowering::VarArgStyleRegisters(CCState &CCInfo, SelectionDAG &DAG,
2884 SDLoc dl, SDValue &Chain,
2886 unsigned TotalArgRegsSaveSize,
2887 bool ForceMutable) const {
2888 MachineFunction &MF = DAG.getMachineFunction();
2889 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2891 // Try to store any remaining integer argument regs
2892 // to their spots on the stack so that they may be loaded by deferencing
2893 // the result of va_next.
2894 // If there is no regs to be stored, just point address after last
2895 // argument passed via stack.
2897 StoreByValRegs(CCInfo, DAG, dl, Chain, nullptr,
2898 CCInfo.getInRegsParamsCount(), 0, ArgOffset, 0, ForceMutable,
2899 0, TotalArgRegsSaveSize);
2901 AFI->setVarArgsFrameIndex(FrameIndex);
2905 ARMTargetLowering::LowerFormalArguments(SDValue Chain,
2906 CallingConv::ID CallConv, bool isVarArg,
2907 const SmallVectorImpl<ISD::InputArg>
2909 SDLoc dl, SelectionDAG &DAG,
2910 SmallVectorImpl<SDValue> &InVals)
2912 MachineFunction &MF = DAG.getMachineFunction();
2913 MachineFrameInfo *MFI = MF.getFrameInfo();
2915 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2917 // Assign locations to all of the incoming arguments.
2918 SmallVector<CCValAssign, 16> ArgLocs;
2919 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2920 getTargetMachine(), ArgLocs, *DAG.getContext(), Prologue);
2921 CCInfo.AnalyzeFormalArguments(Ins,
2922 CCAssignFnForNode(CallConv, /* Return*/ false,
2925 SmallVector<SDValue, 16> ArgValues;
2926 int lastInsIndex = -1;
2928 Function::const_arg_iterator CurOrigArg = MF.getFunction()->arg_begin();
2929 unsigned CurArgIdx = 0;
2931 // Initially ArgRegsSaveSize is zero.
2932 // Then we increase this value each time we meet byval parameter.
2933 // We also increase this value in case of varargs function.
2934 AFI->setArgRegsSaveSize(0);
2936 unsigned ByValStoreOffset = 0;
2937 unsigned TotalArgRegsSaveSize = 0;
2938 unsigned ArgRegsSaveSizeMaxAlign = 4;
2940 // Calculate the amount of stack space that we need to allocate to store
2941 // byval and variadic arguments that are passed in registers.
2942 // We need to know this before we allocate the first byval or variadic
2943 // argument, as they will be allocated a stack slot below the CFA (Canonical
2944 // Frame Address, the stack pointer at entry to the function).
2945 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2946 CCValAssign &VA = ArgLocs[i];
2947 if (VA.isMemLoc()) {
2948 int index = VA.getValNo();
2949 if (index != lastInsIndex) {
2950 ISD::ArgFlagsTy Flags = Ins[index].Flags;
2951 if (Flags.isByVal()) {
2952 unsigned ExtraArgRegsSize;
2953 unsigned ExtraArgRegsSaveSize;
2954 computeRegArea(CCInfo, MF, CCInfo.getInRegsParamsProceed(),
2955 Flags.getByValSize(),
2956 ExtraArgRegsSize, ExtraArgRegsSaveSize);
2958 TotalArgRegsSaveSize += ExtraArgRegsSaveSize;
2959 if (Flags.getByValAlign() > ArgRegsSaveSizeMaxAlign)
2960 ArgRegsSaveSizeMaxAlign = Flags.getByValAlign();
2961 CCInfo.nextInRegsParam();
2963 lastInsIndex = index;
2967 CCInfo.rewindByValRegsInfo();
2970 unsigned ExtraArgRegsSize;
2971 unsigned ExtraArgRegsSaveSize;
2972 computeRegArea(CCInfo, MF, CCInfo.getInRegsParamsCount(), 0,
2973 ExtraArgRegsSize, ExtraArgRegsSaveSize);
2974 TotalArgRegsSaveSize += ExtraArgRegsSaveSize;
2976 // If the arg regs save area contains N-byte aligned values, the
2977 // bottom of it must be at least N-byte aligned.
2978 TotalArgRegsSaveSize = RoundUpToAlignment(TotalArgRegsSaveSize, ArgRegsSaveSizeMaxAlign);
2979 TotalArgRegsSaveSize = std::min(TotalArgRegsSaveSize, 16U);
2981 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2982 CCValAssign &VA = ArgLocs[i];
2983 std::advance(CurOrigArg, Ins[VA.getValNo()].OrigArgIndex - CurArgIdx);
2984 CurArgIdx = Ins[VA.getValNo()].OrigArgIndex;
2985 // Arguments stored in registers.
2986 if (VA.isRegLoc()) {
2987 EVT RegVT = VA.getLocVT();
2989 if (VA.needsCustom()) {
2990 // f64 and vector types are split up into multiple registers or
2991 // combinations of registers and stack slots.
2992 if (VA.getLocVT() == MVT::v2f64) {
2993 SDValue ArgValue1 = GetF64FormalArgument(VA, ArgLocs[++i],
2995 VA = ArgLocs[++i]; // skip ahead to next loc
2997 if (VA.isMemLoc()) {
2998 int FI = MFI->CreateFixedObject(8, VA.getLocMemOffset(), true);
2999 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
3000 ArgValue2 = DAG.getLoad(MVT::f64, dl, Chain, FIN,
3001 MachinePointerInfo::getFixedStack(FI),
3002 false, false, false, 0);
3004 ArgValue2 = GetF64FormalArgument(VA, ArgLocs[++i],
3007 ArgValue = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
3008 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
3009 ArgValue, ArgValue1, DAG.getIntPtrConstant(0));
3010 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
3011 ArgValue, ArgValue2, DAG.getIntPtrConstant(1));
3013 ArgValue = GetF64FormalArgument(VA, ArgLocs[++i], Chain, DAG, dl);
3016 const TargetRegisterClass *RC;
3018 if (RegVT == MVT::f32)
3019 RC = &ARM::SPRRegClass;
3020 else if (RegVT == MVT::f64)
3021 RC = &ARM::DPRRegClass;
3022 else if (RegVT == MVT::v2f64)
3023 RC = &ARM::QPRRegClass;
3024 else if (RegVT == MVT::i32)
3025 RC = AFI->isThumb1OnlyFunction() ?
3026 (const TargetRegisterClass*)&ARM::tGPRRegClass :
3027 (const TargetRegisterClass*)&ARM::GPRRegClass;
3029 llvm_unreachable("RegVT not supported by FORMAL_ARGUMENTS Lowering");
3031 // Transform the arguments in physical registers into virtual ones.
3032 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
3033 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
3036 // If this is an 8 or 16-bit value, it is really passed promoted
3037 // to 32 bits. Insert an assert[sz]ext to capture this, then
3038 // truncate to the right size.
3039 switch (VA.getLocInfo()) {
3040 default: llvm_unreachable("Unknown loc info!");
3041 case CCValAssign::Full: break;
3042 case CCValAssign::BCvt:
3043 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
3045 case CCValAssign::SExt:
3046 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
3047 DAG.getValueType(VA.getValVT()));
3048 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
3050 case CCValAssign::ZExt:
3051 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
3052 DAG.getValueType(VA.getValVT()));
3053 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
3057 InVals.push_back(ArgValue);
3059 } else { // VA.isRegLoc()
3062 assert(VA.isMemLoc());
3063 assert(VA.getValVT() != MVT::i64 && "i64 should already be lowered");
3065 int index = ArgLocs[i].getValNo();
3067 // Some Ins[] entries become multiple ArgLoc[] entries.
3068 // Process them only once.
3069 if (index != lastInsIndex)
3071 ISD::ArgFlagsTy Flags = Ins[index].Flags;
3072 // FIXME: For now, all byval parameter objects are marked mutable.
3073 // This can be changed with more analysis.
3074 // In case of tail call optimization mark all arguments mutable.
3075 // Since they could be overwritten by lowering of arguments in case of
3077 if (Flags.isByVal()) {
3078 unsigned CurByValIndex = CCInfo.getInRegsParamsProceed();
3080 ByValStoreOffset = RoundUpToAlignment(ByValStoreOffset, Flags.getByValAlign());
3081 int FrameIndex = StoreByValRegs(
3082 CCInfo, DAG, dl, Chain, CurOrigArg,
3084 Ins[VA.getValNo()].PartOffset,
3085 VA.getLocMemOffset(),
3086 Flags.getByValSize(),
3087 true /*force mutable frames*/,
3089 TotalArgRegsSaveSize);
3090 ByValStoreOffset += Flags.getByValSize();
3091 ByValStoreOffset = std::min(ByValStoreOffset, 16U);
3092 InVals.push_back(DAG.getFrameIndex(FrameIndex, getPointerTy()));
3093 CCInfo.nextInRegsParam();
3095 unsigned FIOffset = VA.getLocMemOffset();
3096 int FI = MFI->CreateFixedObject(VA.getLocVT().getSizeInBits()/8,
3099 // Create load nodes to retrieve arguments from the stack.
3100 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
3101 InVals.push_back(DAG.getLoad(VA.getValVT(), dl, Chain, FIN,
3102 MachinePointerInfo::getFixedStack(FI),
3103 false, false, false, 0));
3105 lastInsIndex = index;
3112 VarArgStyleRegisters(CCInfo, DAG, dl, Chain,
3113 CCInfo.getNextStackOffset(),
3114 TotalArgRegsSaveSize);
3116 AFI->setArgumentStackSize(CCInfo.getNextStackOffset());
3121 /// isFloatingPointZero - Return true if this is +0.0.
3122 static bool isFloatingPointZero(SDValue Op) {
3123 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op))
3124 return CFP->getValueAPF().isPosZero();
3125 else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) {
3126 // Maybe this has already been legalized into the constant pool?
3127 if (Op.getOperand(1).getOpcode() == ARMISD::Wrapper) {
3128 SDValue WrapperOp = Op.getOperand(1).getOperand(0);
3129 if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(WrapperOp))
3130 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal()))
3131 return CFP->getValueAPF().isPosZero();
3137 /// Returns appropriate ARM CMP (cmp) and corresponding condition code for
3138 /// the given operands.
3140 ARMTargetLowering::getARMCmp(SDValue LHS, SDValue RHS, ISD::CondCode CC,
3141 SDValue &ARMcc, SelectionDAG &DAG,
3143 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS.getNode())) {
3144 unsigned C = RHSC->getZExtValue();
3145 if (!isLegalICmpImmediate(C)) {
3146 // Constant does not fit, try adjusting it by one?
3151 if (C != 0x80000000 && isLegalICmpImmediate(C-1)) {
3152 CC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGT;
3153 RHS = DAG.getConstant(C-1, MVT::i32);
3158 if (C != 0 && isLegalICmpImmediate(C-1)) {
3159 CC = (CC == ISD::SETULT) ? ISD::SETULE : ISD::SETUGT;
3160 RHS = DAG.getConstant(C-1, MVT::i32);
3165 if (C != 0x7fffffff && isLegalICmpImmediate(C+1)) {
3166 CC = (CC == ISD::SETLE) ? ISD::SETLT : ISD::SETGE;
3167 RHS = DAG.getConstant(C+1, MVT::i32);
3172 if (C != 0xffffffff && isLegalICmpImmediate(C+1)) {
3173 CC = (CC == ISD::SETULE) ? ISD::SETULT : ISD::SETUGE;
3174 RHS = DAG.getConstant(C+1, MVT::i32);
3181 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
3182 ARMISD::NodeType CompareType;
3185 CompareType = ARMISD::CMP;
3190 CompareType = ARMISD::CMPZ;
3193 ARMcc = DAG.getConstant(CondCode, MVT::i32);
3194 return DAG.getNode(CompareType, dl, MVT::Glue, LHS, RHS);
3197 /// Returns a appropriate VFP CMP (fcmp{s|d}+fmstat) for the given operands.
3199 ARMTargetLowering::getVFPCmp(SDValue LHS, SDValue RHS, SelectionDAG &DAG,
3202 if (!isFloatingPointZero(RHS))
3203 Cmp = DAG.getNode(ARMISD::CMPFP, dl, MVT::Glue, LHS, RHS);
3205 Cmp = DAG.getNode(ARMISD::CMPFPw0, dl, MVT::Glue, LHS);
3206 return DAG.getNode(ARMISD::FMSTAT, dl, MVT::Glue, Cmp);
3209 /// duplicateCmp - Glue values can have only one use, so this function
3210 /// duplicates a comparison node.
3212 ARMTargetLowering::duplicateCmp(SDValue Cmp, SelectionDAG &DAG) const {
3213 unsigned Opc = Cmp.getOpcode();
3215 if (Opc == ARMISD::CMP || Opc == ARMISD::CMPZ)
3216 return DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1));
3218 assert(Opc == ARMISD::FMSTAT && "unexpected comparison operation");
3219 Cmp = Cmp.getOperand(0);
3220 Opc = Cmp.getOpcode();
3221 if (Opc == ARMISD::CMPFP)
3222 Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1));
3224 assert(Opc == ARMISD::CMPFPw0 && "unexpected operand of FMSTAT");
3225 Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0));
3227 return DAG.getNode(ARMISD::FMSTAT, DL, MVT::Glue, Cmp);
3230 std::pair<SDValue, SDValue>
3231 ARMTargetLowering::getARMXALUOOp(SDValue Op, SelectionDAG &DAG,
3232 SDValue &ARMcc) const {
3233 assert(Op.getValueType() == MVT::i32 && "Unsupported value type");
3235 SDValue Value, OverflowCmp;
3236 SDValue LHS = Op.getOperand(0);
3237 SDValue RHS = Op.getOperand(1);
3240 // FIXME: We are currently always generating CMPs because we don't support
3241 // generating CMN through the backend. This is not as good as the natural
3242 // CMP case because it causes a register dependency and cannot be folded
3245 switch (Op.getOpcode()) {
3247 llvm_unreachable("Unknown overflow instruction!");
3249 ARMcc = DAG.getConstant(ARMCC::VC, MVT::i32);
3250 Value = DAG.getNode(ISD::ADD, SDLoc(Op), Op.getValueType(), LHS, RHS);
3251 OverflowCmp = DAG.getNode(ARMISD::CMP, SDLoc(Op), MVT::Glue, Value, LHS);
3254 ARMcc = DAG.getConstant(ARMCC::HS, MVT::i32);
3255 Value = DAG.getNode(ISD::ADD, SDLoc(Op), Op.getValueType(), LHS, RHS);
3256 OverflowCmp = DAG.getNode(ARMISD::CMP, SDLoc(Op), MVT::Glue, Value, LHS);
3259 ARMcc = DAG.getConstant(ARMCC::VC, MVT::i32);
3260 Value = DAG.getNode(ISD::SUB, SDLoc(Op), Op.getValueType(), LHS, RHS);
3261 OverflowCmp = DAG.getNode(ARMISD::CMP, SDLoc(Op), MVT::Glue, LHS, RHS);
3264 ARMcc = DAG.getConstant(ARMCC::HS, MVT::i32);
3265 Value = DAG.getNode(ISD::SUB, SDLoc(Op), Op.getValueType(), LHS, RHS);
3266 OverflowCmp = DAG.getNode(ARMISD::CMP, SDLoc(Op), MVT::Glue, LHS, RHS);
3270 return std::make_pair(Value, OverflowCmp);
3275 ARMTargetLowering::LowerXALUO(SDValue Op, SelectionDAG &DAG) const {
3276 // Let legalize expand this if it isn't a legal type yet.
3277 if (!DAG.getTargetLoweringInfo().isTypeLegal(Op.getValueType()))
3280 SDValue Value, OverflowCmp;
3282 std::tie(Value, OverflowCmp) = getARMXALUOOp(Op, DAG, ARMcc);
3283 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3284 // We use 0 and 1 as false and true values.
3285 SDValue TVal = DAG.getConstant(1, MVT::i32);
3286 SDValue FVal = DAG.getConstant(0, MVT::i32);
3287 EVT VT = Op.getValueType();
3289 SDValue Overflow = DAG.getNode(ARMISD::CMOV, SDLoc(Op), VT, TVal, FVal,
3290 ARMcc, CCR, OverflowCmp);
3292 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
3293 return DAG.getNode(ISD::MERGE_VALUES, SDLoc(Op), VTs, Value, Overflow);
3297 SDValue ARMTargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
3298 SDValue Cond = Op.getOperand(0);
3299 SDValue SelectTrue = Op.getOperand(1);
3300 SDValue SelectFalse = Op.getOperand(2);
3302 unsigned Opc = Cond.getOpcode();
3304 if (Cond.getResNo() == 1 &&
3305 (Opc == ISD::SADDO || Opc == ISD::UADDO || Opc == ISD::SSUBO ||
3306 Opc == ISD::USUBO)) {
3307 if (!DAG.getTargetLoweringInfo().isTypeLegal(Cond->getValueType(0)))
3310 SDValue Value, OverflowCmp;
3312 std::tie(Value, OverflowCmp) = getARMXALUOOp(Cond, DAG, ARMcc);
3313 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3314 EVT VT = Op.getValueType();
3316 return DAG.getNode(ARMISD::CMOV, SDLoc(Op), VT, SelectTrue, SelectFalse,
3317 ARMcc, CCR, OverflowCmp);
3323 // (select (cmov 1, 0, cond), t, f) -> (cmov t, f, cond)
3324 // (select (cmov 0, 1, cond), t, f) -> (cmov f, t, cond)
3326 if (Cond.getOpcode() == ARMISD::CMOV && Cond.hasOneUse()) {
3327 const ConstantSDNode *CMOVTrue =
3328 dyn_cast<ConstantSDNode>(Cond.getOperand(0));
3329 const ConstantSDNode *CMOVFalse =
3330 dyn_cast<ConstantSDNode>(Cond.getOperand(1));
3332 if (CMOVTrue && CMOVFalse) {
3333 unsigned CMOVTrueVal = CMOVTrue->getZExtValue();
3334 unsigned CMOVFalseVal = CMOVFalse->getZExtValue();
3338 if (CMOVTrueVal == 1 && CMOVFalseVal == 0) {
3340 False = SelectFalse;
3341 } else if (CMOVTrueVal == 0 && CMOVFalseVal == 1) {
3346 if (True.getNode() && False.getNode()) {
3347 EVT VT = Op.getValueType();
3348 SDValue ARMcc = Cond.getOperand(2);
3349 SDValue CCR = Cond.getOperand(3);
3350 SDValue Cmp = duplicateCmp(Cond.getOperand(4), DAG);
3351 assert(True.getValueType() == VT);
3352 return DAG.getNode(ARMISD::CMOV, dl, VT, True, False, ARMcc, CCR, Cmp);
3357 // ARM's BooleanContents value is UndefinedBooleanContent. Mask out the
3358 // undefined bits before doing a full-word comparison with zero.
3359 Cond = DAG.getNode(ISD::AND, dl, Cond.getValueType(), Cond,
3360 DAG.getConstant(1, Cond.getValueType()));
3362 return DAG.getSelectCC(dl, Cond,
3363 DAG.getConstant(0, Cond.getValueType()),
3364 SelectTrue, SelectFalse, ISD::SETNE);
3367 static ISD::CondCode getInverseCCForVSEL(ISD::CondCode CC) {
3368 if (CC == ISD::SETNE)
3370 return ISD::getSetCCInverse(CC, true);
3373 static void checkVSELConstraints(ISD::CondCode CC, ARMCC::CondCodes &CondCode,
3374 bool &swpCmpOps, bool &swpVselOps) {
3375 // Start by selecting the GE condition code for opcodes that return true for
3377 if (CC == ISD::SETUGE || CC == ISD::SETOGE || CC == ISD::SETOLE ||
3379 CondCode = ARMCC::GE;
3381 // and GT for opcodes that return false for 'equality'.
3382 else if (CC == ISD::SETUGT || CC == ISD::SETOGT || CC == ISD::SETOLT ||
3384 CondCode = ARMCC::GT;
3386 // Since we are constrained to GE/GT, if the opcode contains 'less', we need
3387 // to swap the compare operands.
3388 if (CC == ISD::SETOLE || CC == ISD::SETULE || CC == ISD::SETOLT ||
3392 // Both GT and GE are ordered comparisons, and return false for 'unordered'.
3393 // If we have an unordered opcode, we need to swap the operands to the VSEL
3394 // instruction (effectively negating the condition).
3396 // This also has the effect of swapping which one of 'less' or 'greater'
3397 // returns true, so we also swap the compare operands. It also switches
3398 // whether we return true for 'equality', so we compensate by picking the
3399 // opposite condition code to our original choice.
3400 if (CC == ISD::SETULE || CC == ISD::SETULT || CC == ISD::SETUGE ||
3401 CC == ISD::SETUGT) {
3402 swpCmpOps = !swpCmpOps;
3403 swpVselOps = !swpVselOps;
3404 CondCode = CondCode == ARMCC::GT ? ARMCC::GE : ARMCC::GT;
3407 // 'ordered' is 'anything but unordered', so use the VS condition code and
3408 // swap the VSEL operands.
3409 if (CC == ISD::SETO) {
3410 CondCode = ARMCC::VS;
3414 // 'unordered or not equal' is 'anything but equal', so use the EQ condition
3415 // code and swap the VSEL operands.
3416 if (CC == ISD::SETUNE) {
3417 CondCode = ARMCC::EQ;
3422 SDValue ARMTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
3423 EVT VT = Op.getValueType();
3424 SDValue LHS = Op.getOperand(0);
3425 SDValue RHS = Op.getOperand(1);
3426 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
3427 SDValue TrueVal = Op.getOperand(2);
3428 SDValue FalseVal = Op.getOperand(3);
3431 if (LHS.getValueType() == MVT::i32) {
3432 // Try to generate VSEL on ARMv8.
3433 // The VSEL instruction can't use all the usual ARM condition
3434 // codes: it only has two bits to select the condition code, so it's
3435 // constrained to use only GE, GT, VS and EQ.
3437 // To implement all the various ISD::SETXXX opcodes, we sometimes need to
3438 // swap the operands of the previous compare instruction (effectively
3439 // inverting the compare condition, swapping 'less' and 'greater') and
3440 // sometimes need to swap the operands to the VSEL (which inverts the
3441 // condition in the sense of firing whenever the previous condition didn't)
3442 if (getSubtarget()->hasFPARMv8() && (TrueVal.getValueType() == MVT::f32 ||
3443 TrueVal.getValueType() == MVT::f64)) {
3444 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
3445 if (CondCode == ARMCC::LT || CondCode == ARMCC::LE ||
3446 CondCode == ARMCC::VC || CondCode == ARMCC::NE) {
3447 CC = getInverseCCForVSEL(CC);
3448 std::swap(TrueVal, FalseVal);
3453 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3454 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
3455 return DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc, CCR,
3459 ARMCC::CondCodes CondCode, CondCode2;
3460 FPCCToARMCC(CC, CondCode, CondCode2);
3462 // Try to generate VSEL on ARMv8.
3463 if (getSubtarget()->hasFPARMv8() && (TrueVal.getValueType() == MVT::f32 ||
3464 TrueVal.getValueType() == MVT::f64)) {
3465 // We can select VMAXNM/VMINNM from a compare followed by a select with the
3466 // same operands, as follows:
3467 // c = fcmp [ogt, olt, ugt, ult] a, b
3469 // We only do this in unsafe-fp-math, because signed zeros and NaNs are
3470 // handled differently than the original code sequence.
3471 if (getTargetMachine().Options.UnsafeFPMath && LHS == TrueVal &&
3473 if (CC == ISD::SETOGT || CC == ISD::SETUGT)
3474 return DAG.getNode(ARMISD::VMAXNM, dl, VT, TrueVal, FalseVal);
3475 if (CC == ISD::SETOLT || CC == ISD::SETULT)
3476 return DAG.getNode(ARMISD::VMINNM, dl, VT, TrueVal, FalseVal);
3479 bool swpCmpOps = false;
3480 bool swpVselOps = false;
3481 checkVSELConstraints(CC, CondCode, swpCmpOps, swpVselOps);
3483 if (CondCode == ARMCC::GT || CondCode == ARMCC::GE ||
3484 CondCode == ARMCC::VS || CondCode == ARMCC::EQ) {
3486 std::swap(LHS, RHS);
3488 std::swap(TrueVal, FalseVal);
3492 SDValue ARMcc = DAG.getConstant(CondCode, MVT::i32);
3493 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
3494 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3495 SDValue Result = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal,
3497 if (CondCode2 != ARMCC::AL) {
3498 SDValue ARMcc2 = DAG.getConstant(CondCode2, MVT::i32);
3499 // FIXME: Needs another CMP because flag can have but one use.
3500 SDValue Cmp2 = getVFPCmp(LHS, RHS, DAG, dl);
3501 Result = DAG.getNode(ARMISD::CMOV, dl, VT,
3502 Result, TrueVal, ARMcc2, CCR, Cmp2);
3507 /// canChangeToInt - Given the fp compare operand, return true if it is suitable
3508 /// to morph to an integer compare sequence.
3509 static bool canChangeToInt(SDValue Op, bool &SeenZero,
3510 const ARMSubtarget *Subtarget) {
3511 SDNode *N = Op.getNode();
3512 if (!N->hasOneUse())
3513 // Otherwise it requires moving the value from fp to integer registers.
3515 if (!N->getNumValues())
3517 EVT VT = Op.getValueType();
3518 if (VT != MVT::f32 && !Subtarget->isFPBrccSlow())
3519 // f32 case is generally profitable. f64 case only makes sense when vcmpe +
3520 // vmrs are very slow, e.g. cortex-a8.
3523 if (isFloatingPointZero(Op)) {
3527 return ISD::isNormalLoad(N);
3530 static SDValue bitcastf32Toi32(SDValue Op, SelectionDAG &DAG) {
3531 if (isFloatingPointZero(Op))
3532 return DAG.getConstant(0, MVT::i32);
3534 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op))
3535 return DAG.getLoad(MVT::i32, SDLoc(Op),
3536 Ld->getChain(), Ld->getBasePtr(), Ld->getPointerInfo(),
3537 Ld->isVolatile(), Ld->isNonTemporal(),
3538 Ld->isInvariant(), Ld->getAlignment());
3540 llvm_unreachable("Unknown VFP cmp argument!");
3543 static void expandf64Toi32(SDValue Op, SelectionDAG &DAG,
3544 SDValue &RetVal1, SDValue &RetVal2) {
3545 if (isFloatingPointZero(Op)) {
3546 RetVal1 = DAG.getConstant(0, MVT::i32);
3547 RetVal2 = DAG.getConstant(0, MVT::i32);
3551 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op)) {
3552 SDValue Ptr = Ld->getBasePtr();
3553 RetVal1 = DAG.getLoad(MVT::i32, SDLoc(Op),
3554 Ld->getChain(), Ptr,
3555 Ld->getPointerInfo(),
3556 Ld->isVolatile(), Ld->isNonTemporal(),
3557 Ld->isInvariant(), Ld->getAlignment());
3559 EVT PtrType = Ptr.getValueType();
3560 unsigned NewAlign = MinAlign(Ld->getAlignment(), 4);
3561 SDValue NewPtr = DAG.getNode(ISD::ADD, SDLoc(Op),
3562 PtrType, Ptr, DAG.getConstant(4, PtrType));
3563 RetVal2 = DAG.getLoad(MVT::i32, SDLoc(Op),
3564 Ld->getChain(), NewPtr,
3565 Ld->getPointerInfo().getWithOffset(4),
3566 Ld->isVolatile(), Ld->isNonTemporal(),
3567 Ld->isInvariant(), NewAlign);
3571 llvm_unreachable("Unknown VFP cmp argument!");
3574 /// OptimizeVFPBrcond - With -enable-unsafe-fp-math, it's legal to optimize some
3575 /// f32 and even f64 comparisons to integer ones.
3577 ARMTargetLowering::OptimizeVFPBrcond(SDValue Op, SelectionDAG &DAG) const {
3578 SDValue Chain = Op.getOperand(0);
3579 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
3580 SDValue LHS = Op.getOperand(2);
3581 SDValue RHS = Op.getOperand(3);
3582 SDValue Dest = Op.getOperand(4);
3585 bool LHSSeenZero = false;
3586 bool LHSOk = canChangeToInt(LHS, LHSSeenZero, Subtarget);
3587 bool RHSSeenZero = false;
3588 bool RHSOk = canChangeToInt(RHS, RHSSeenZero, Subtarget);
3589 if (LHSOk && RHSOk && (LHSSeenZero || RHSSeenZero)) {
3590 // If unsafe fp math optimization is enabled and there are no other uses of
3591 // the CMP operands, and the condition code is EQ or NE, we can optimize it
3592 // to an integer comparison.
3593 if (CC == ISD::SETOEQ)
3595 else if (CC == ISD::SETUNE)
3598 SDValue Mask = DAG.getConstant(0x7fffffff, MVT::i32);
3600 if (LHS.getValueType() == MVT::f32) {
3601 LHS = DAG.getNode(ISD::AND, dl, MVT::i32,
3602 bitcastf32Toi32(LHS, DAG), Mask);
3603 RHS = DAG.getNode(ISD::AND, dl, MVT::i32,
3604 bitcastf32Toi32(RHS, DAG), Mask);
3605 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
3606 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3607 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
3608 Chain, Dest, ARMcc, CCR, Cmp);
3613 expandf64Toi32(LHS, DAG, LHS1, LHS2);
3614 expandf64Toi32(RHS, DAG, RHS1, RHS2);
3615 LHS2 = DAG.getNode(ISD::AND, dl, MVT::i32, LHS2, Mask);
3616 RHS2 = DAG.getNode(ISD::AND, dl, MVT::i32, RHS2, Mask);
3617 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
3618 ARMcc = DAG.getConstant(CondCode, MVT::i32);
3619 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue);
3620 SDValue Ops[] = { Chain, ARMcc, LHS1, LHS2, RHS1, RHS2, Dest };
3621 return DAG.getNode(ARMISD::BCC_i64, dl, VTList, Ops);
3627 SDValue ARMTargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) const {
3628 SDValue Chain = Op.getOperand(0);
3629 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
3630 SDValue LHS = Op.getOperand(2);
3631 SDValue RHS = Op.getOperand(3);
3632 SDValue Dest = Op.getOperand(4);
3635 if (LHS.getValueType() == MVT::i32) {
3637 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
3638 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3639 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
3640 Chain, Dest, ARMcc, CCR, Cmp);
3643 assert(LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64);
3645 if (getTargetMachine().Options.UnsafeFPMath &&
3646 (CC == ISD::SETEQ || CC == ISD::SETOEQ ||
3647 CC == ISD::SETNE || CC == ISD::SETUNE)) {
3648 SDValue Result = OptimizeVFPBrcond(Op, DAG);
3649 if (Result.getNode())
3653 ARMCC::CondCodes CondCode, CondCode2;
3654 FPCCToARMCC(CC, CondCode, CondCode2);
3656 SDValue ARMcc = DAG.getConstant(CondCode, MVT::i32);
3657 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
3658 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3659 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue);
3660 SDValue Ops[] = { Chain, Dest, ARMcc, CCR, Cmp };
3661 SDValue Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops);
3662 if (CondCode2 != ARMCC::AL) {
3663 ARMcc = DAG.getConstant(CondCode2, MVT::i32);
3664 SDValue Ops[] = { Res, Dest, ARMcc, CCR, Res.getValue(1) };
3665 Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops);
3670 SDValue ARMTargetLowering::LowerBR_JT(SDValue Op, SelectionDAG &DAG) const {
3671 SDValue Chain = Op.getOperand(0);
3672 SDValue Table = Op.getOperand(1);
3673 SDValue Index = Op.getOperand(2);
3676 EVT PTy = getPointerTy();
3677 JumpTableSDNode *JT = cast<JumpTableSDNode>(Table);
3678 ARMFunctionInfo *AFI = DAG.getMachineFunction().getInfo<ARMFunctionInfo>();
3679 SDValue UId = DAG.getConstant(AFI->createJumpTableUId(), PTy);
3680 SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PTy);
3681 Table = DAG.getNode(ARMISD::WrapperJT, dl, MVT::i32, JTI, UId);
3682 Index = DAG.getNode(ISD::MUL, dl, PTy, Index, DAG.getConstant(4, PTy));
3683 SDValue Addr = DAG.getNode(ISD::ADD, dl, PTy, Index, Table);
3684 if (Subtarget->isThumb2()) {
3685 // Thumb2 uses a two-level jump. That is, it jumps into the jump table
3686 // which does another jump to the destination. This also makes it easier
3687 // to translate it to TBB / TBH later.
3688 // FIXME: This might not work if the function is extremely large.
3689 return DAG.getNode(ARMISD::BR2_JT, dl, MVT::Other, Chain,
3690 Addr, Op.getOperand(2), JTI, UId);
3692 if (getTargetMachine().getRelocationModel() == Reloc::PIC_) {
3693 Addr = DAG.getLoad((EVT)MVT::i32, dl, Chain, Addr,
3694 MachinePointerInfo::getJumpTable(),
3695 false, false, false, 0);
3696 Chain = Addr.getValue(1);
3697 Addr = DAG.getNode(ISD::ADD, dl, PTy, Addr, Table);
3698 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
3700 Addr = DAG.getLoad(PTy, dl, Chain, Addr,
3701 MachinePointerInfo::getJumpTable(),
3702 false, false, false, 0);
3703 Chain = Addr.getValue(1);
3704 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
3708 static SDValue LowerVectorFP_TO_INT(SDValue Op, SelectionDAG &DAG) {
3709 EVT VT = Op.getValueType();
3712 if (Op.getValueType().getVectorElementType() == MVT::i32) {
3713 if (Op.getOperand(0).getValueType().getVectorElementType() == MVT::f32)
3715 return DAG.UnrollVectorOp(Op.getNode());
3718 assert(Op.getOperand(0).getValueType() == MVT::v4f32 &&
3719 "Invalid type for custom lowering!");
3720 if (VT != MVT::v4i16)
3721 return DAG.UnrollVectorOp(Op.getNode());
3723 Op = DAG.getNode(Op.getOpcode(), dl, MVT::v4i32, Op.getOperand(0));
3724 return DAG.getNode(ISD::TRUNCATE, dl, VT, Op);
3727 static SDValue LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG) {
3728 EVT VT = Op.getValueType();
3730 return LowerVectorFP_TO_INT(Op, DAG);
3735 switch (Op.getOpcode()) {
3736 default: llvm_unreachable("Invalid opcode!");
3737 case ISD::FP_TO_SINT:
3738 Opc = ARMISD::FTOSI;
3740 case ISD::FP_TO_UINT:
3741 Opc = ARMISD::FTOUI;
3744 Op = DAG.getNode(Opc, dl, MVT::f32, Op.getOperand(0));
3745 return DAG.getNode(ISD::BITCAST, dl, MVT::i32, Op);
3748 static SDValue LowerVectorINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
3749 EVT VT = Op.getValueType();
3752 if (Op.getOperand(0).getValueType().getVectorElementType() == MVT::i32) {
3753 if (VT.getVectorElementType() == MVT::f32)
3755 return DAG.UnrollVectorOp(Op.getNode());
3758 assert(Op.getOperand(0).getValueType() == MVT::v4i16 &&
3759 "Invalid type for custom lowering!");
3760 if (VT != MVT::v4f32)
3761 return DAG.UnrollVectorOp(Op.getNode());
3765 switch (Op.getOpcode()) {
3766 default: llvm_unreachable("Invalid opcode!");
3767 case ISD::SINT_TO_FP:
3768 CastOpc = ISD::SIGN_EXTEND;
3769 Opc = ISD::SINT_TO_FP;
3771 case ISD::UINT_TO_FP:
3772 CastOpc = ISD::ZERO_EXTEND;
3773 Opc = ISD::UINT_TO_FP;
3777 Op = DAG.getNode(CastOpc, dl, MVT::v4i32, Op.getOperand(0));
3778 return DAG.getNode(Opc, dl, VT, Op);
3781 static SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
3782 EVT VT = Op.getValueType();
3784 return LowerVectorINT_TO_FP(Op, DAG);
3789 switch (Op.getOpcode()) {
3790 default: llvm_unreachable("Invalid opcode!");
3791 case ISD::SINT_TO_FP:
3792 Opc = ARMISD::SITOF;
3794 case ISD::UINT_TO_FP:
3795 Opc = ARMISD::UITOF;
3799 Op = DAG.getNode(ISD::BITCAST, dl, MVT::f32, Op.getOperand(0));
3800 return DAG.getNode(Opc, dl, VT, Op);
3803 SDValue ARMTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
3804 // Implement fcopysign with a fabs and a conditional fneg.
3805 SDValue Tmp0 = Op.getOperand(0);
3806 SDValue Tmp1 = Op.getOperand(1);
3808 EVT VT = Op.getValueType();
3809 EVT SrcVT = Tmp1.getValueType();
3810 bool InGPR = Tmp0.getOpcode() == ISD::BITCAST ||
3811 Tmp0.getOpcode() == ARMISD::VMOVDRR;
3812 bool UseNEON = !InGPR && Subtarget->hasNEON();
3815 // Use VBSL to copy the sign bit.
3816 unsigned EncodedVal = ARM_AM::createNEONModImm(0x6, 0x80);
3817 SDValue Mask = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v2i32,
3818 DAG.getTargetConstant(EncodedVal, MVT::i32));
3819 EVT OpVT = (VT == MVT::f32) ? MVT::v2i32 : MVT::v1i64;
3821 Mask = DAG.getNode(ARMISD::VSHL, dl, OpVT,
3822 DAG.getNode(ISD::BITCAST, dl, OpVT, Mask),
3823 DAG.getConstant(32, MVT::i32));
3824 else /*if (VT == MVT::f32)*/
3825 Tmp0 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp0);
3826 if (SrcVT == MVT::f32) {
3827 Tmp1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp1);
3829 Tmp1 = DAG.getNode(ARMISD::VSHL, dl, OpVT,
3830 DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1),
3831 DAG.getConstant(32, MVT::i32));
3832 } else if (VT == MVT::f32)
3833 Tmp1 = DAG.getNode(ARMISD::VSHRu, dl, MVT::v1i64,
3834 DAG.getNode(ISD::BITCAST, dl, MVT::v1i64, Tmp1),
3835 DAG.getConstant(32, MVT::i32));
3836 Tmp0 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp0);
3837 Tmp1 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1);
3839 SDValue AllOnes = DAG.getTargetConstant(ARM_AM::createNEONModImm(0xe, 0xff),
3841 AllOnes = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v8i8, AllOnes);
3842 SDValue MaskNot = DAG.getNode(ISD::XOR, dl, OpVT, Mask,
3843 DAG.getNode(ISD::BITCAST, dl, OpVT, AllOnes));
3845 SDValue Res = DAG.getNode(ISD::OR, dl, OpVT,
3846 DAG.getNode(ISD::AND, dl, OpVT, Tmp1, Mask),
3847 DAG.getNode(ISD::AND, dl, OpVT, Tmp0, MaskNot));
3848 if (VT == MVT::f32) {
3849 Res = DAG.getNode(ISD::BITCAST, dl, MVT::v2f32, Res);
3850 Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, Res,
3851 DAG.getConstant(0, MVT::i32));
3853 Res = DAG.getNode(ISD::BITCAST, dl, MVT::f64, Res);
3859 // Bitcast operand 1 to i32.
3860 if (SrcVT == MVT::f64)
3861 Tmp1 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32),
3863 Tmp1 = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp1);
3865 // Or in the signbit with integer operations.
3866 SDValue Mask1 = DAG.getConstant(0x80000000, MVT::i32);
3867 SDValue Mask2 = DAG.getConstant(0x7fffffff, MVT::i32);
3868 Tmp1 = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp1, Mask1);
3869 if (VT == MVT::f32) {
3870 Tmp0 = DAG.getNode(ISD::AND, dl, MVT::i32,
3871 DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp0), Mask2);
3872 return DAG.getNode(ISD::BITCAST, dl, MVT::f32,
3873 DAG.getNode(ISD::OR, dl, MVT::i32, Tmp0, Tmp1));
3876 // f64: Or the high part with signbit and then combine two parts.
3877 Tmp0 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32),
3879 SDValue Lo = Tmp0.getValue(0);
3880 SDValue Hi = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp0.getValue(1), Mask2);
3881 Hi = DAG.getNode(ISD::OR, dl, MVT::i32, Hi, Tmp1);
3882 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
3885 SDValue ARMTargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const{
3886 MachineFunction &MF = DAG.getMachineFunction();
3887 MachineFrameInfo *MFI = MF.getFrameInfo();
3888 MFI->setReturnAddressIsTaken(true);
3890 if (verifyReturnAddressArgumentIsConstant(Op, DAG))
3893 EVT VT = Op.getValueType();
3895 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
3897 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
3898 SDValue Offset = DAG.getConstant(4, MVT::i32);
3899 return DAG.getLoad(VT, dl, DAG.getEntryNode(),
3900 DAG.getNode(ISD::ADD, dl, VT, FrameAddr, Offset),
3901 MachinePointerInfo(), false, false, false, 0);
3904 // Return LR, which contains the return address. Mark it an implicit live-in.
3905 unsigned Reg = MF.addLiveIn(ARM::LR, getRegClassFor(MVT::i32));
3906 return DAG.getCopyFromReg(DAG.getEntryNode(), dl, Reg, VT);
3909 SDValue ARMTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
3910 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
3911 MFI->setFrameAddressIsTaken(true);
3913 EVT VT = Op.getValueType();
3914 SDLoc dl(Op); // FIXME probably not meaningful
3915 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
3916 unsigned FrameReg = (Subtarget->isThumb() || Subtarget->isTargetMachO())
3917 ? ARM::R7 : ARM::R11;
3918 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
3920 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
3921 MachinePointerInfo(),
3922 false, false, false, 0);
3926 // FIXME? Maybe this could be a TableGen attribute on some registers and
3927 // this table could be generated automatically from RegInfo.
3928 unsigned ARMTargetLowering::getRegisterByName(const char* RegName,
3930 unsigned Reg = StringSwitch<unsigned>(RegName)
3931 .Case("sp", ARM::SP)
3935 report_fatal_error("Invalid register name global variable");
3938 /// ExpandBITCAST - If the target supports VFP, this function is called to
3939 /// expand a bit convert where either the source or destination type is i64 to
3940 /// use a VMOVDRR or VMOVRRD node. This should not be done when the non-i64
3941 /// operand type is illegal (e.g., v2f32 for a target that doesn't support
3942 /// vectors), since the legalizer won't know what to do with that.
3943 static SDValue ExpandBITCAST(SDNode *N, SelectionDAG &DAG) {
3944 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
3946 SDValue Op = N->getOperand(0);
3948 // This function is only supposed to be called for i64 types, either as the
3949 // source or destination of the bit convert.
3950 EVT SrcVT = Op.getValueType();
3951 EVT DstVT = N->getValueType(0);
3952 assert((SrcVT == MVT::i64 || DstVT == MVT::i64) &&
3953 "ExpandBITCAST called for non-i64 type");
3955 // Turn i64->f64 into VMOVDRR.
3956 if (SrcVT == MVT::i64 && TLI.isTypeLegal(DstVT)) {
3957 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
3958 DAG.getConstant(0, MVT::i32));
3959 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
3960 DAG.getConstant(1, MVT::i32));
3961 return DAG.getNode(ISD::BITCAST, dl, DstVT,
3962 DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi));
3965 // Turn f64->i64 into VMOVRRD.
3966 if (DstVT == MVT::i64 && TLI.isTypeLegal(SrcVT)) {
3968 if (TLI.isBigEndian() && SrcVT.isVector())
3969 Cvt = DAG.getNode(ARMISD::VMOVRRD, dl,
3970 DAG.getVTList(MVT::i32, MVT::i32),
3971 DAG.getNode(ARMISD::VREV64, dl, SrcVT, Op));
3973 Cvt = DAG.getNode(ARMISD::VMOVRRD, dl,
3974 DAG.getVTList(MVT::i32, MVT::i32), Op);
3975 // Merge the pieces into a single i64 value.
3976 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Cvt, Cvt.getValue(1));
3982 /// getZeroVector - Returns a vector of specified type with all zero elements.
3983 /// Zero vectors are used to represent vector negation and in those cases
3984 /// will be implemented with the NEON VNEG instruction. However, VNEG does
3985 /// not support i64 elements, so sometimes the zero vectors will need to be
3986 /// explicitly constructed. Regardless, use a canonical VMOV to create the
3988 static SDValue getZeroVector(EVT VT, SelectionDAG &DAG, SDLoc dl) {
3989 assert(VT.isVector() && "Expected a vector type");
3990 // The canonical modified immediate encoding of a zero vector is....0!
3991 SDValue EncodedVal = DAG.getTargetConstant(0, MVT::i32);
3992 EVT VmovVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32;
3993 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, EncodedVal);
3994 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
3997 /// LowerShiftRightParts - Lower SRA_PARTS, which returns two
3998 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
3999 SDValue ARMTargetLowering::LowerShiftRightParts(SDValue Op,
4000 SelectionDAG &DAG) const {
4001 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
4002 EVT VT = Op.getValueType();
4003 unsigned VTBits = VT.getSizeInBits();
4005 SDValue ShOpLo = Op.getOperand(0);
4006 SDValue ShOpHi = Op.getOperand(1);
4007 SDValue ShAmt = Op.getOperand(2);
4009 unsigned Opc = (Op.getOpcode() == ISD::SRA_PARTS) ? ISD::SRA : ISD::SRL;
4011 assert(Op.getOpcode() == ISD::SRA_PARTS || Op.getOpcode() == ISD::SRL_PARTS);
4013 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
4014 DAG.getConstant(VTBits, MVT::i32), ShAmt);
4015 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, ShAmt);
4016 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
4017 DAG.getConstant(VTBits, MVT::i32));
4018 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, RevShAmt);
4019 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
4020 SDValue TrueVal = DAG.getNode(Opc, dl, VT, ShOpHi, ExtraShAmt);
4022 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
4023 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
4025 SDValue Hi = DAG.getNode(Opc, dl, VT, ShOpHi, ShAmt);
4026 SDValue Lo = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc,
4029 SDValue Ops[2] = { Lo, Hi };
4030 return DAG.getMergeValues(Ops, dl);
4033 /// LowerShiftLeftParts - Lower SHL_PARTS, which returns two
4034 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
4035 SDValue ARMTargetLowering::LowerShiftLeftParts(SDValue Op,
4036 SelectionDAG &DAG) const {
4037 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
4038 EVT VT = Op.getValueType();
4039 unsigned VTBits = VT.getSizeInBits();
4041 SDValue ShOpLo = Op.getOperand(0);
4042 SDValue ShOpHi = Op.getOperand(1);
4043 SDValue ShAmt = Op.getOperand(2);
4046 assert(Op.getOpcode() == ISD::SHL_PARTS);
4047 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
4048 DAG.getConstant(VTBits, MVT::i32), ShAmt);
4049 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, RevShAmt);
4050 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
4051 DAG.getConstant(VTBits, MVT::i32));
4052 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, ShAmt);
4053 SDValue Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ExtraShAmt);
4055 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
4056 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
4057 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
4059 SDValue Lo = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
4060 SDValue Hi = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, Tmp3, ARMcc,
4063 SDValue Ops[2] = { Lo, Hi };
4064 return DAG.getMergeValues(Ops, dl);
4067 SDValue ARMTargetLowering::LowerFLT_ROUNDS_(SDValue Op,
4068 SelectionDAG &DAG) const {
4069 // The rounding mode is in bits 23:22 of the FPSCR.
4070 // The ARM rounding mode value to FLT_ROUNDS mapping is 0->1, 1->2, 2->3, 3->0
4071 // The formula we use to implement this is (((FPSCR + 1 << 22) >> 22) & 3)
4072 // so that the shift + and get folded into a bitfield extract.
4074 SDValue FPSCR = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::i32,
4075 DAG.getConstant(Intrinsic::arm_get_fpscr,
4077 SDValue FltRounds = DAG.getNode(ISD::ADD, dl, MVT::i32, FPSCR,
4078 DAG.getConstant(1U << 22, MVT::i32));
4079 SDValue RMODE = DAG.getNode(ISD::SRL, dl, MVT::i32, FltRounds,
4080 DAG.getConstant(22, MVT::i32));
4081 return DAG.getNode(ISD::AND, dl, MVT::i32, RMODE,
4082 DAG.getConstant(3, MVT::i32));
4085 static SDValue LowerCTTZ(SDNode *N, SelectionDAG &DAG,
4086 const ARMSubtarget *ST) {
4087 EVT VT = N->getValueType(0);
4090 if (!ST->hasV6T2Ops())
4093 SDValue rbit = DAG.getNode(ARMISD::RBIT, dl, VT, N->getOperand(0));
4094 return DAG.getNode(ISD::CTLZ, dl, VT, rbit);
4097 /// getCTPOP16BitCounts - Returns a v8i8/v16i8 vector containing the bit-count
4098 /// for each 16-bit element from operand, repeated. The basic idea is to
4099 /// leverage vcnt to get the 8-bit counts, gather and add the results.
4101 /// Trace for v4i16:
4102 /// input = [v0 v1 v2 v3 ] (vi 16-bit element)
4103 /// cast: N0 = [w0 w1 w2 w3 w4 w5 w6 w7] (v0 = [w0 w1], wi 8-bit element)
4104 /// vcnt: N1 = [b0 b1 b2 b3 b4 b5 b6 b7] (bi = bit-count of 8-bit element wi)
4105 /// vrev: N2 = [b1 b0 b3 b2 b5 b4 b7 b6]
4106 /// [b0 b1 b2 b3 b4 b5 b6 b7]
4107 /// +[b1 b0 b3 b2 b5 b4 b7 b6]
4108 /// N3=N1+N2 = [k0 k0 k1 k1 k2 k2 k3 k3] (k0 = b0+b1 = bit-count of 16-bit v0,
4109 /// vuzp: = [k0 k1 k2 k3 k0 k1 k2 k3] each ki is 8-bits)
4110 static SDValue getCTPOP16BitCounts(SDNode *N, SelectionDAG &DAG) {
4111 EVT VT = N->getValueType(0);
4114 EVT VT8Bit = VT.is64BitVector() ? MVT::v8i8 : MVT::v16i8;
4115 SDValue N0 = DAG.getNode(ISD::BITCAST, DL, VT8Bit, N->getOperand(0));
4116 SDValue N1 = DAG.getNode(ISD::CTPOP, DL, VT8Bit, N0);
4117 SDValue N2 = DAG.getNode(ARMISD::VREV16, DL, VT8Bit, N1);
4118 SDValue N3 = DAG.getNode(ISD::ADD, DL, VT8Bit, N1, N2);
4119 return DAG.getNode(ARMISD::VUZP, DL, VT8Bit, N3, N3);
4122 /// lowerCTPOP16BitElements - Returns a v4i16/v8i16 vector containing the
4123 /// bit-count for each 16-bit element from the operand. We need slightly
4124 /// different sequencing for v4i16 and v8i16 to stay within NEON's available
4125 /// 64/128-bit registers.
4127 /// Trace for v4i16:
4128 /// input = [v0 v1 v2 v3 ] (vi 16-bit element)
4129 /// v8i8: BitCounts = [k0 k1 k2 k3 k0 k1 k2 k3 ] (ki is the bit-count of vi)
4130 /// v8i16:Extended = [k0 k1 k2 k3 k0 k1 k2 k3 ]
4131 /// v4i16:Extracted = [k0 k1 k2 k3 ]
4132 static SDValue lowerCTPOP16BitElements(SDNode *N, SelectionDAG &DAG) {
4133 EVT VT = N->getValueType(0);
4136 SDValue BitCounts = getCTPOP16BitCounts(N, DAG);
4137 if (VT.is64BitVector()) {
4138 SDValue Extended = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::v8i16, BitCounts);
4139 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v4i16, Extended,
4140 DAG.getIntPtrConstant(0));
4142 SDValue Extracted = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v8i8,
4143 BitCounts, DAG.getIntPtrConstant(0));
4144 return DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::v8i16, Extracted);
4148 /// lowerCTPOP32BitElements - Returns a v2i32/v4i32 vector containing the
4149 /// bit-count for each 32-bit element from the operand. The idea here is
4150 /// to split the vector into 16-bit elements, leverage the 16-bit count
4151 /// routine, and then combine the results.
4153 /// Trace for v2i32 (v4i32 similar with Extracted/Extended exchanged):
4154 /// input = [v0 v1 ] (vi: 32-bit elements)
4155 /// Bitcast = [w0 w1 w2 w3 ] (wi: 16-bit elements, v0 = [w0 w1])
4156 /// Counts16 = [k0 k1 k2 k3 ] (ki: 16-bit elements, bit-count of wi)
4157 /// vrev: N0 = [k1 k0 k3 k2 ]
4159 /// N1 =+[k1 k0 k3 k2 ]
4161 /// N2 =+[k1 k3 k0 k2 ]
4163 /// Extended =+[k1 k3 k0 k2 ]
4165 /// Extracted=+[k1 k3 ]
4167 static SDValue lowerCTPOP32BitElements(SDNode *N, SelectionDAG &DAG) {
4168 EVT VT = N->getValueType(0);
4171 EVT VT16Bit = VT.is64BitVector() ? MVT::v4i16 : MVT::v8i16;
4173 SDValue Bitcast = DAG.getNode(ISD::BITCAST, DL, VT16Bit, N->getOperand(0));
4174 SDValue Counts16 = lowerCTPOP16BitElements(Bitcast.getNode(), DAG);
4175 SDValue N0 = DAG.getNode(ARMISD::VREV32, DL, VT16Bit, Counts16);
4176 SDValue N1 = DAG.getNode(ISD::ADD, DL, VT16Bit, Counts16, N0);
4177 SDValue N2 = DAG.getNode(ARMISD::VUZP, DL, VT16Bit, N1, N1);
4179 if (VT.is64BitVector()) {
4180 SDValue Extended = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::v4i32, N2);
4181 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v2i32, Extended,
4182 DAG.getIntPtrConstant(0));
4184 SDValue Extracted = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v4i16, N2,
4185 DAG.getIntPtrConstant(0));
4186 return DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::v4i32, Extracted);
4190 static SDValue LowerCTPOP(SDNode *N, SelectionDAG &DAG,
4191 const ARMSubtarget *ST) {
4192 EVT VT = N->getValueType(0);
4194 assert(ST->hasNEON() && "Custom ctpop lowering requires NEON.");
4195 assert((VT == MVT::v2i32 || VT == MVT::v4i32 ||
4196 VT == MVT::v4i16 || VT == MVT::v8i16) &&
4197 "Unexpected type for custom ctpop lowering");
4199 if (VT.getVectorElementType() == MVT::i32)
4200 return lowerCTPOP32BitElements(N, DAG);
4202 return lowerCTPOP16BitElements(N, DAG);
4205 static SDValue LowerShift(SDNode *N, SelectionDAG &DAG,
4206 const ARMSubtarget *ST) {
4207 EVT VT = N->getValueType(0);
4213 // Lower vector shifts on NEON to use VSHL.
4214 assert(ST->hasNEON() && "unexpected vector shift");
4216 // Left shifts translate directly to the vshiftu intrinsic.
4217 if (N->getOpcode() == ISD::SHL)
4218 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
4219 DAG.getConstant(Intrinsic::arm_neon_vshiftu, MVT::i32),
4220 N->getOperand(0), N->getOperand(1));
4222 assert((N->getOpcode() == ISD::SRA ||
4223 N->getOpcode() == ISD::SRL) && "unexpected vector shift opcode");
4225 // NEON uses the same intrinsics for both left and right shifts. For
4226 // right shifts, the shift amounts are negative, so negate the vector of
4228 EVT ShiftVT = N->getOperand(1).getValueType();
4229 SDValue NegatedCount = DAG.getNode(ISD::SUB, dl, ShiftVT,
4230 getZeroVector(ShiftVT, DAG, dl),
4232 Intrinsic::ID vshiftInt = (N->getOpcode() == ISD::SRA ?
4233 Intrinsic::arm_neon_vshifts :
4234 Intrinsic::arm_neon_vshiftu);
4235 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
4236 DAG.getConstant(vshiftInt, MVT::i32),
4237 N->getOperand(0), NegatedCount);
4240 static SDValue Expand64BitShift(SDNode *N, SelectionDAG &DAG,
4241 const ARMSubtarget *ST) {
4242 EVT VT = N->getValueType(0);
4245 // We can get here for a node like i32 = ISD::SHL i32, i64
4249 assert((N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA) &&
4250 "Unknown shift to lower!");
4252 // We only lower SRA, SRL of 1 here, all others use generic lowering.
4253 if (!isa<ConstantSDNode>(N->getOperand(1)) ||
4254 cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() != 1)
4257 // If we are in thumb mode, we don't have RRX.
4258 if (ST->isThumb1Only()) return SDValue();
4260 // Okay, we have a 64-bit SRA or SRL of 1. Lower this to an RRX expr.
4261 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
4262 DAG.getConstant(0, MVT::i32));
4263 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
4264 DAG.getConstant(1, MVT::i32));
4266 // First, build a SRA_FLAG/SRL_FLAG op, which shifts the top part by one and
4267 // captures the result into a carry flag.
4268 unsigned Opc = N->getOpcode() == ISD::SRL ? ARMISD::SRL_FLAG:ARMISD::SRA_FLAG;
4269 Hi = DAG.getNode(Opc, dl, DAG.getVTList(MVT::i32, MVT::Glue), Hi);
4271 // The low part is an ARMISD::RRX operand, which shifts the carry in.
4272 Lo = DAG.getNode(ARMISD::RRX, dl, MVT::i32, Lo, Hi.getValue(1));
4274 // Merge the pieces into a single i64 value.
4275 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi);
4278 static SDValue LowerVSETCC(SDValue Op, SelectionDAG &DAG) {
4279 SDValue TmpOp0, TmpOp1;
4280 bool Invert = false;
4284 SDValue Op0 = Op.getOperand(0);
4285 SDValue Op1 = Op.getOperand(1);
4286 SDValue CC = Op.getOperand(2);
4287 EVT VT = Op.getValueType();
4288 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
4291 if (Op.getOperand(1).getValueType().isFloatingPoint()) {
4292 switch (SetCCOpcode) {
4293 default: llvm_unreachable("Illegal FP comparison");
4295 case ISD::SETNE: Invert = true; // Fallthrough
4297 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
4299 case ISD::SETLT: Swap = true; // Fallthrough
4301 case ISD::SETGT: Opc = ARMISD::VCGT; break;
4303 case ISD::SETLE: Swap = true; // Fallthrough
4305 case ISD::SETGE: Opc = ARMISD::VCGE; break;
4306 case ISD::SETUGE: Swap = true; // Fallthrough
4307 case ISD::SETULE: Invert = true; Opc = ARMISD::VCGT; break;
4308 case ISD::SETUGT: Swap = true; // Fallthrough
4309 case ISD::SETULT: Invert = true; Opc = ARMISD::VCGE; break;
4310 case ISD::SETUEQ: Invert = true; // Fallthrough
4312 // Expand this to (OLT | OGT).
4316 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
4317 Op1 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp0, TmpOp1);
4319 case ISD::SETUO: Invert = true; // Fallthrough
4321 // Expand this to (OLT | OGE).
4325 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
4326 Op1 = DAG.getNode(ARMISD::VCGE, dl, VT, TmpOp0, TmpOp1);
4330 // Integer comparisons.
4331 switch (SetCCOpcode) {
4332 default: llvm_unreachable("Illegal integer comparison");
4333 case ISD::SETNE: Invert = true;
4334 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
4335 case ISD::SETLT: Swap = true;
4336 case ISD::SETGT: Opc = ARMISD::VCGT; break;
4337 case ISD::SETLE: Swap = true;
4338 case ISD::SETGE: Opc = ARMISD::VCGE; break;
4339 case ISD::SETULT: Swap = true;
4340 case ISD::SETUGT: Opc = ARMISD::VCGTU; break;
4341 case ISD::SETULE: Swap = true;
4342 case ISD::SETUGE: Opc = ARMISD::VCGEU; break;
4345 // Detect VTST (Vector Test Bits) = icmp ne (and (op0, op1), zero).
4346 if (Opc == ARMISD::VCEQ) {
4349 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
4351 else if (ISD::isBuildVectorAllZeros(Op0.getNode()))
4354 // Ignore bitconvert.
4355 if (AndOp.getNode() && AndOp.getOpcode() == ISD::BITCAST)
4356 AndOp = AndOp.getOperand(0);
4358 if (AndOp.getNode() && AndOp.getOpcode() == ISD::AND) {
4360 Op0 = DAG.getNode(ISD::BITCAST, dl, VT, AndOp.getOperand(0));
4361 Op1 = DAG.getNode(ISD::BITCAST, dl, VT, AndOp.getOperand(1));
4368 std::swap(Op0, Op1);
4370 // If one of the operands is a constant vector zero, attempt to fold the
4371 // comparison to a specialized compare-against-zero form.
4373 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
4375 else if (ISD::isBuildVectorAllZeros(Op0.getNode())) {
4376 if (Opc == ARMISD::VCGE)
4377 Opc = ARMISD::VCLEZ;
4378 else if (Opc == ARMISD::VCGT)
4379 Opc = ARMISD::VCLTZ;
4384 if (SingleOp.getNode()) {
4387 Result = DAG.getNode(ARMISD::VCEQZ, dl, VT, SingleOp); break;
4389 Result = DAG.getNode(ARMISD::VCGEZ, dl, VT, SingleOp); break;
4391 Result = DAG.getNode(ARMISD::VCLEZ, dl, VT, SingleOp); break;
4393 Result = DAG.getNode(ARMISD::VCGTZ, dl, VT, SingleOp); break;
4395 Result = DAG.getNode(ARMISD::VCLTZ, dl, VT, SingleOp); break;
4397 Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
4400 Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
4404 Result = DAG.getNOT(dl, Result, VT);
4409 /// isNEONModifiedImm - Check if the specified splat value corresponds to a
4410 /// valid vector constant for a NEON instruction with a "modified immediate"
4411 /// operand (e.g., VMOV). If so, return the encoded value.
4412 static SDValue isNEONModifiedImm(uint64_t SplatBits, uint64_t SplatUndef,
4413 unsigned SplatBitSize, SelectionDAG &DAG,
4414 EVT &VT, bool is128Bits, NEONModImmType type) {
4415 unsigned OpCmode, Imm;
4417 // SplatBitSize is set to the smallest size that splats the vector, so a
4418 // zero vector will always have SplatBitSize == 8. However, NEON modified
4419 // immediate instructions others than VMOV do not support the 8-bit encoding
4420 // of a zero vector, and the default encoding of zero is supposed to be the
4425 switch (SplatBitSize) {
4427 if (type != VMOVModImm)
4429 // Any 1-byte value is OK. Op=0, Cmode=1110.
4430 assert((SplatBits & ~0xff) == 0 && "one byte splat value is too big");
4433 VT = is128Bits ? MVT::v16i8 : MVT::v8i8;
4437 // NEON's 16-bit VMOV supports splat values where only one byte is nonzero.
4438 VT = is128Bits ? MVT::v8i16 : MVT::v4i16;
4439 if ((SplatBits & ~0xff) == 0) {
4440 // Value = 0x00nn: Op=x, Cmode=100x.
4445 if ((SplatBits & ~0xff00) == 0) {
4446 // Value = 0xnn00: Op=x, Cmode=101x.
4448 Imm = SplatBits >> 8;
4454 // NEON's 32-bit VMOV supports splat values where:
4455 // * only one byte is nonzero, or
4456 // * the least significant byte is 0xff and the second byte is nonzero, or
4457 // * the least significant 2 bytes are 0xff and the third is nonzero.
4458 VT = is128Bits ? MVT::v4i32 : MVT::v2i32;
4459 if ((SplatBits & ~0xff) == 0) {
4460 // Value = 0x000000nn: Op=x, Cmode=000x.
4465 if ((SplatBits & ~0xff00) == 0) {
4466 // Value = 0x0000nn00: Op=x, Cmode=001x.
4468 Imm = SplatBits >> 8;
4471 if ((SplatBits & ~0xff0000) == 0) {
4472 // Value = 0x00nn0000: Op=x, Cmode=010x.
4474 Imm = SplatBits >> 16;
4477 if ((SplatBits & ~0xff000000) == 0) {
4478 // Value = 0xnn000000: Op=x, Cmode=011x.
4480 Imm = SplatBits >> 24;
4484 // cmode == 0b1100 and cmode == 0b1101 are not supported for VORR or VBIC
4485 if (type == OtherModImm) return SDValue();
4487 if ((SplatBits & ~0xffff) == 0 &&
4488 ((SplatBits | SplatUndef) & 0xff) == 0xff) {
4489 // Value = 0x0000nnff: Op=x, Cmode=1100.
4491 Imm = SplatBits >> 8;
4495 if ((SplatBits & ~0xffffff) == 0 &&
4496 ((SplatBits | SplatUndef) & 0xffff) == 0xffff) {
4497 // Value = 0x00nnffff: Op=x, Cmode=1101.
4499 Imm = SplatBits >> 16;
4503 // Note: there are a few 32-bit splat values (specifically: 00ffff00,
4504 // ff000000, ff0000ff, and ffff00ff) that are valid for VMOV.I64 but not
4505 // VMOV.I32. A (very) minor optimization would be to replicate the value
4506 // and fall through here to test for a valid 64-bit splat. But, then the
4507 // caller would also need to check and handle the change in size.
4511 if (type != VMOVModImm)
4513 // NEON has a 64-bit VMOV splat where each byte is either 0 or 0xff.
4514 uint64_t BitMask = 0xff;
4516 unsigned ImmMask = 1;
4518 for (int ByteNum = 0; ByteNum < 8; ++ByteNum) {
4519 if (((SplatBits | SplatUndef) & BitMask) == BitMask) {
4522 } else if ((SplatBits & BitMask) != 0) {
4528 // Op=1, Cmode=1110.
4530 VT = is128Bits ? MVT::v2i64 : MVT::v1i64;
4535 llvm_unreachable("unexpected size for isNEONModifiedImm");
4538 unsigned EncodedVal = ARM_AM::createNEONModImm(OpCmode, Imm);
4539 return DAG.getTargetConstant(EncodedVal, MVT::i32);
4542 SDValue ARMTargetLowering::LowerConstantFP(SDValue Op, SelectionDAG &DAG,
4543 const ARMSubtarget *ST) const {
4547 bool IsDouble = Op.getValueType() == MVT::f64;
4548 ConstantFPSDNode *CFP = cast<ConstantFPSDNode>(Op);
4550 // Try splatting with a VMOV.f32...
4551 APFloat FPVal = CFP->getValueAPF();
4552 int ImmVal = IsDouble ? ARM_AM::getFP64Imm(FPVal) : ARM_AM::getFP32Imm(FPVal);
4555 if (IsDouble || !ST->useNEONForSinglePrecisionFP()) {
4556 // We have code in place to select a valid ConstantFP already, no need to
4561 // It's a float and we are trying to use NEON operations where
4562 // possible. Lower it to a splat followed by an extract.
4564 SDValue NewVal = DAG.getTargetConstant(ImmVal, MVT::i32);
4565 SDValue VecConstant = DAG.getNode(ARMISD::VMOVFPIMM, DL, MVT::v2f32,
4567 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, VecConstant,
4568 DAG.getConstant(0, MVT::i32));
4571 // The rest of our options are NEON only, make sure that's allowed before
4573 if (!ST->hasNEON() || (!IsDouble && !ST->useNEONForSinglePrecisionFP()))
4577 uint64_t iVal = FPVal.bitcastToAPInt().getZExtValue();
4579 // It wouldn't really be worth bothering for doubles except for one very
4580 // important value, which does happen to match: 0.0. So make sure we don't do
4582 if (IsDouble && (iVal & 0xffffffff) != (iVal >> 32))
4585 // Try a VMOV.i32 (FIXME: i8, i16, or i64 could work too).
4586 SDValue NewVal = isNEONModifiedImm(iVal & 0xffffffffU, 0, 32, DAG, VMovVT,
4588 if (NewVal != SDValue()) {
4590 SDValue VecConstant = DAG.getNode(ARMISD::VMOVIMM, DL, VMovVT,
4593 return DAG.getNode(ISD::BITCAST, DL, MVT::f64, VecConstant);
4595 // It's a float: cast and extract a vector element.
4596 SDValue VecFConstant = DAG.getNode(ISD::BITCAST, DL, MVT::v2f32,
4598 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, VecFConstant,
4599 DAG.getConstant(0, MVT::i32));
4602 // Finally, try a VMVN.i32
4603 NewVal = isNEONModifiedImm(~iVal & 0xffffffffU, 0, 32, DAG, VMovVT,
4605 if (NewVal != SDValue()) {
4607 SDValue VecConstant = DAG.getNode(ARMISD::VMVNIMM, DL, VMovVT, NewVal);
4610 return DAG.getNode(ISD::BITCAST, DL, MVT::f64, VecConstant);
4612 // It's a float: cast and extract a vector element.
4613 SDValue VecFConstant = DAG.getNode(ISD::BITCAST, DL, MVT::v2f32,
4615 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, VecFConstant,
4616 DAG.getConstant(0, MVT::i32));
4622 // check if an VEXT instruction can handle the shuffle mask when the
4623 // vector sources of the shuffle are the same.
4624 static bool isSingletonVEXTMask(ArrayRef<int> M, EVT VT, unsigned &Imm) {
4625 unsigned NumElts = VT.getVectorNumElements();
4627 // Assume that the first shuffle index is not UNDEF. Fail if it is.
4633 // If this is a VEXT shuffle, the immediate value is the index of the first
4634 // element. The other shuffle indices must be the successive elements after
4636 unsigned ExpectedElt = Imm;
4637 for (unsigned i = 1; i < NumElts; ++i) {
4638 // Increment the expected index. If it wraps around, just follow it
4639 // back to index zero and keep going.
4641 if (ExpectedElt == NumElts)
4644 if (M[i] < 0) continue; // ignore UNDEF indices
4645 if (ExpectedElt != static_cast<unsigned>(M[i]))
4653 static bool isVEXTMask(ArrayRef<int> M, EVT VT,
4654 bool &ReverseVEXT, unsigned &Imm) {
4655 unsigned NumElts = VT.getVectorNumElements();
4656 ReverseVEXT = false;
4658 // Assume that the first shuffle index is not UNDEF. Fail if it is.
4664 // If this is a VEXT shuffle, the immediate value is the index of the first
4665 // element. The other shuffle indices must be the successive elements after
4667 unsigned ExpectedElt = Imm;
4668 for (unsigned i = 1; i < NumElts; ++i) {
4669 // Increment the expected index. If it wraps around, it may still be
4670 // a VEXT but the source vectors must be swapped.
4672 if (ExpectedElt == NumElts * 2) {
4677 if (M[i] < 0) continue; // ignore UNDEF indices
4678 if (ExpectedElt != static_cast<unsigned>(M[i]))
4682 // Adjust the index value if the source operands will be swapped.
4689 /// isVREVMask - Check if a vector shuffle corresponds to a VREV
4690 /// instruction with the specified blocksize. (The order of the elements
4691 /// within each block of the vector is reversed.)
4692 static bool isVREVMask(ArrayRef<int> M, EVT VT, unsigned BlockSize) {
4693 assert((BlockSize==16 || BlockSize==32 || BlockSize==64) &&
4694 "Only possible block sizes for VREV are: 16, 32, 64");
4696 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
4700 unsigned NumElts = VT.getVectorNumElements();
4701 unsigned BlockElts = M[0] + 1;
4702 // If the first shuffle index is UNDEF, be optimistic.
4704 BlockElts = BlockSize / EltSz;
4706 if (BlockSize <= EltSz || BlockSize != BlockElts * EltSz)
4709 for (unsigned i = 0; i < NumElts; ++i) {
4710 if (M[i] < 0) continue; // ignore UNDEF indices
4711 if ((unsigned) M[i] != (i - i%BlockElts) + (BlockElts - 1 - i%BlockElts))
4718 static bool isVTBLMask(ArrayRef<int> M, EVT VT) {
4719 // We can handle <8 x i8> vector shuffles. If the index in the mask is out of
4720 // range, then 0 is placed into the resulting vector. So pretty much any mask
4721 // of 8 elements can work here.
4722 return VT == MVT::v8i8 && M.size() == 8;
4725 static bool isVTRNMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
4726 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
4730 unsigned NumElts = VT.getVectorNumElements();
4731 WhichResult = (M[0] == 0 ? 0 : 1);
4732 for (unsigned i = 0; i < NumElts; i += 2) {
4733 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
4734 (M[i+1] >= 0 && (unsigned) M[i+1] != i + NumElts + WhichResult))
4740 /// isVTRN_v_undef_Mask - Special case of isVTRNMask for canonical form of
4741 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
4742 /// Mask is e.g., <0, 0, 2, 2> instead of <0, 4, 2, 6>.
4743 static bool isVTRN_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
4744 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
4748 unsigned NumElts = VT.getVectorNumElements();
4749 WhichResult = (M[0] == 0 ? 0 : 1);
4750 for (unsigned i = 0; i < NumElts; i += 2) {
4751 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
4752 (M[i+1] >= 0 && (unsigned) M[i+1] != i + WhichResult))
4758 static bool isVUZPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
4759 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
4763 unsigned NumElts = VT.getVectorNumElements();
4764 WhichResult = (M[0] == 0 ? 0 : 1);
4765 for (unsigned i = 0; i != NumElts; ++i) {
4766 if (M[i] < 0) continue; // ignore UNDEF indices
4767 if ((unsigned) M[i] != 2 * i + WhichResult)
4771 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
4772 if (VT.is64BitVector() && EltSz == 32)
4778 /// isVUZP_v_undef_Mask - Special case of isVUZPMask for canonical form of
4779 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
4780 /// Mask is e.g., <0, 2, 0, 2> instead of <0, 2, 4, 6>,
4781 static bool isVUZP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
4782 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
4786 unsigned Half = VT.getVectorNumElements() / 2;
4787 WhichResult = (M[0] == 0 ? 0 : 1);
4788 for (unsigned j = 0; j != 2; ++j) {
4789 unsigned Idx = WhichResult;
4790 for (unsigned i = 0; i != Half; ++i) {
4791 int MIdx = M[i + j * Half];
4792 if (MIdx >= 0 && (unsigned) MIdx != Idx)
4798 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
4799 if (VT.is64BitVector() && EltSz == 32)
4805 static bool isVZIPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
4806 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
4810 unsigned NumElts = VT.getVectorNumElements();
4811 WhichResult = (M[0] == 0 ? 0 : 1);
4812 unsigned Idx = WhichResult * NumElts / 2;
4813 for (unsigned i = 0; i != NumElts; i += 2) {
4814 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
4815 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx + NumElts))
4820 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
4821 if (VT.is64BitVector() && EltSz == 32)
4827 /// isVZIP_v_undef_Mask - Special case of isVZIPMask for canonical form of
4828 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
4829 /// Mask is e.g., <0, 0, 1, 1> instead of <0, 4, 1, 5>.
4830 static bool isVZIP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
4831 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
4835 unsigned NumElts = VT.getVectorNumElements();
4836 WhichResult = (M[0] == 0 ? 0 : 1);
4837 unsigned Idx = WhichResult * NumElts / 2;
4838 for (unsigned i = 0; i != NumElts; i += 2) {
4839 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
4840 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx))
4845 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
4846 if (VT.is64BitVector() && EltSz == 32)
4852 /// \return true if this is a reverse operation on an vector.
4853 static bool isReverseMask(ArrayRef<int> M, EVT VT) {
4854 unsigned NumElts = VT.getVectorNumElements();
4855 // Make sure the mask has the right size.
4856 if (NumElts != M.size())
4859 // Look for <15, ..., 3, -1, 1, 0>.
4860 for (unsigned i = 0; i != NumElts; ++i)
4861 if (M[i] >= 0 && M[i] != (int) (NumElts - 1 - i))
4867 // If N is an integer constant that can be moved into a register in one
4868 // instruction, return an SDValue of such a constant (will become a MOV
4869 // instruction). Otherwise return null.
4870 static SDValue IsSingleInstrConstant(SDValue N, SelectionDAG &DAG,
4871 const ARMSubtarget *ST, SDLoc dl) {
4873 if (!isa<ConstantSDNode>(N))
4875 Val = cast<ConstantSDNode>(N)->getZExtValue();
4877 if (ST->isThumb1Only()) {
4878 if (Val <= 255 || ~Val <= 255)
4879 return DAG.getConstant(Val, MVT::i32);
4881 if (ARM_AM::getSOImmVal(Val) != -1 || ARM_AM::getSOImmVal(~Val) != -1)
4882 return DAG.getConstant(Val, MVT::i32);
4887 // If this is a case we can't handle, return null and let the default
4888 // expansion code take care of it.
4889 SDValue ARMTargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG,
4890 const ARMSubtarget *ST) const {
4891 BuildVectorSDNode *BVN = cast<BuildVectorSDNode>(Op.getNode());
4893 EVT VT = Op.getValueType();
4895 APInt SplatBits, SplatUndef;
4896 unsigned SplatBitSize;
4898 if (BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
4899 if (SplatBitSize <= 64) {
4900 // Check if an immediate VMOV works.
4902 SDValue Val = isNEONModifiedImm(SplatBits.getZExtValue(),
4903 SplatUndef.getZExtValue(), SplatBitSize,
4904 DAG, VmovVT, VT.is128BitVector(),
4906 if (Val.getNode()) {
4907 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, Val);
4908 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
4911 // Try an immediate VMVN.
4912 uint64_t NegatedImm = (~SplatBits).getZExtValue();
4913 Val = isNEONModifiedImm(NegatedImm,
4914 SplatUndef.getZExtValue(), SplatBitSize,
4915 DAG, VmovVT, VT.is128BitVector(),
4917 if (Val.getNode()) {
4918 SDValue Vmov = DAG.getNode(ARMISD::VMVNIMM, dl, VmovVT, Val);
4919 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
4922 // Use vmov.f32 to materialize other v2f32 and v4f32 splats.
4923 if ((VT == MVT::v2f32 || VT == MVT::v4f32) && SplatBitSize == 32) {
4924 int ImmVal = ARM_AM::getFP32Imm(SplatBits);
4926 SDValue Val = DAG.getTargetConstant(ImmVal, MVT::i32);
4927 return DAG.getNode(ARMISD::VMOVFPIMM, dl, VT, Val);
4933 // Scan through the operands to see if only one value is used.
4935 // As an optimisation, even if more than one value is used it may be more
4936 // profitable to splat with one value then change some lanes.
4938 // Heuristically we decide to do this if the vector has a "dominant" value,
4939 // defined as splatted to more than half of the lanes.
4940 unsigned NumElts = VT.getVectorNumElements();
4941 bool isOnlyLowElement = true;
4942 bool usesOnlyOneValue = true;
4943 bool hasDominantValue = false;
4944 bool isConstant = true;
4946 // Map of the number of times a particular SDValue appears in the
4948 DenseMap<SDValue, unsigned> ValueCounts;
4950 for (unsigned i = 0; i < NumElts; ++i) {
4951 SDValue V = Op.getOperand(i);
4952 if (V.getOpcode() == ISD::UNDEF)
4955 isOnlyLowElement = false;
4956 if (!isa<ConstantFPSDNode>(V) && !isa<ConstantSDNode>(V))
4959 ValueCounts.insert(std::make_pair(V, 0));
4960 unsigned &Count = ValueCounts[V];
4962 // Is this value dominant? (takes up more than half of the lanes)
4963 if (++Count > (NumElts / 2)) {
4964 hasDominantValue = true;
4968 if (ValueCounts.size() != 1)
4969 usesOnlyOneValue = false;
4970 if (!Value.getNode() && ValueCounts.size() > 0)
4971 Value = ValueCounts.begin()->first;
4973 if (ValueCounts.size() == 0)
4974 return DAG.getUNDEF(VT);
4976 // Loads are better lowered with insert_vector_elt/ARMISD::BUILD_VECTOR.
4977 // Keep going if we are hitting this case.
4978 if (isOnlyLowElement && !ISD::isNormalLoad(Value.getNode()))
4979 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Value);
4981 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4983 // Use VDUP for non-constant splats. For f32 constant splats, reduce to
4984 // i32 and try again.
4985 if (hasDominantValue && EltSize <= 32) {
4989 // If we are VDUPing a value that comes directly from a vector, that will
4990 // cause an unnecessary move to and from a GPR, where instead we could
4991 // just use VDUPLANE. We can only do this if the lane being extracted
4992 // is at a constant index, as the VDUP from lane instructions only have
4993 // constant-index forms.
4994 if (Value->getOpcode() == ISD::EXTRACT_VECTOR_ELT &&
4995 isa<ConstantSDNode>(Value->getOperand(1))) {
4996 // We need to create a new undef vector to use for the VDUPLANE if the
4997 // size of the vector from which we get the value is different than the
4998 // size of the vector that we need to create. We will insert the element
4999 // such that the register coalescer will remove unnecessary copies.
5000 if (VT != Value->getOperand(0).getValueType()) {
5001 ConstantSDNode *constIndex;
5002 constIndex = dyn_cast<ConstantSDNode>(Value->getOperand(1));
5003 assert(constIndex && "The index is not a constant!");
5004 unsigned index = constIndex->getAPIntValue().getLimitedValue() %
5005 VT.getVectorNumElements();
5006 N = DAG.getNode(ARMISD::VDUPLANE, dl, VT,
5007 DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, DAG.getUNDEF(VT),
5008 Value, DAG.getConstant(index, MVT::i32)),
5009 DAG.getConstant(index, MVT::i32));
5011 N = DAG.getNode(ARMISD::VDUPLANE, dl, VT,
5012 Value->getOperand(0), Value->getOperand(1));
5014 N = DAG.getNode(ARMISD::VDUP, dl, VT, Value);
5016 if (!usesOnlyOneValue) {
5017 // The dominant value was splatted as 'N', but we now have to insert
5018 // all differing elements.
5019 for (unsigned I = 0; I < NumElts; ++I) {
5020 if (Op.getOperand(I) == Value)
5022 SmallVector<SDValue, 3> Ops;
5024 Ops.push_back(Op.getOperand(I));
5025 Ops.push_back(DAG.getConstant(I, MVT::i32));
5026 N = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Ops);
5031 if (VT.getVectorElementType().isFloatingPoint()) {
5032 SmallVector<SDValue, 8> Ops;
5033 for (unsigned i = 0; i < NumElts; ++i)
5034 Ops.push_back(DAG.getNode(ISD::BITCAST, dl, MVT::i32,
5036 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, NumElts);
5037 SDValue Val = DAG.getNode(ISD::BUILD_VECTOR, dl, VecVT, Ops);
5038 Val = LowerBUILD_VECTOR(Val, DAG, ST);
5040 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
5042 if (usesOnlyOneValue) {
5043 SDValue Val = IsSingleInstrConstant(Value, DAG, ST, dl);
5044 if (isConstant && Val.getNode())
5045 return DAG.getNode(ARMISD::VDUP, dl, VT, Val);
5049 // If all elements are constants and the case above didn't get hit, fall back
5050 // to the default expansion, which will generate a load from the constant
5055 // Empirical tests suggest this is rarely worth it for vectors of length <= 2.
5057 SDValue shuffle = ReconstructShuffle(Op, DAG);
5058 if (shuffle != SDValue())
5062 // Vectors with 32- or 64-bit elements can be built by directly assigning
5063 // the subregisters. Lower it to an ARMISD::BUILD_VECTOR so the operands
5064 // will be legalized.
5065 if (EltSize >= 32) {
5066 // Do the expansion with floating-point types, since that is what the VFP
5067 // registers are defined to use, and since i64 is not legal.
5068 EVT EltVT = EVT::getFloatingPointVT(EltSize);
5069 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
5070 SmallVector<SDValue, 8> Ops;
5071 for (unsigned i = 0; i < NumElts; ++i)
5072 Ops.push_back(DAG.getNode(ISD::BITCAST, dl, EltVT, Op.getOperand(i)));
5073 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, Ops);
5074 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
5077 // If all else fails, just use a sequence of INSERT_VECTOR_ELT when we
5078 // know the default expansion would otherwise fall back on something even
5079 // worse. For a vector with one or two non-undef values, that's
5080 // scalar_to_vector for the elements followed by a shuffle (provided the
5081 // shuffle is valid for the target) and materialization element by element
5082 // on the stack followed by a load for everything else.
5083 if (!isConstant && !usesOnlyOneValue) {
5084 SDValue Vec = DAG.getUNDEF(VT);
5085 for (unsigned i = 0 ; i < NumElts; ++i) {
5086 SDValue V = Op.getOperand(i);
5087 if (V.getOpcode() == ISD::UNDEF)
5089 SDValue LaneIdx = DAG.getConstant(i, MVT::i32);
5090 Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Vec, V, LaneIdx);
5098 // Gather data to see if the operation can be modelled as a
5099 // shuffle in combination with VEXTs.
5100 SDValue ARMTargetLowering::ReconstructShuffle(SDValue Op,
5101 SelectionDAG &DAG) const {
5103 EVT VT = Op.getValueType();
5104 unsigned NumElts = VT.getVectorNumElements();
5106 SmallVector<SDValue, 2> SourceVecs;
5107 SmallVector<unsigned, 2> MinElts;
5108 SmallVector<unsigned, 2> MaxElts;
5110 for (unsigned i = 0; i < NumElts; ++i) {
5111 SDValue V = Op.getOperand(i);
5112 if (V.getOpcode() == ISD::UNDEF)
5114 else if (V.getOpcode() != ISD::EXTRACT_VECTOR_ELT) {
5115 // A shuffle can only come from building a vector from various
5116 // elements of other vectors.
5118 } else if (V.getOperand(0).getValueType().getVectorElementType() !=
5119 VT.getVectorElementType()) {
5120 // This code doesn't know how to handle shuffles where the vector
5121 // element types do not match (this happens because type legalization
5122 // promotes the return type of EXTRACT_VECTOR_ELT).
5123 // FIXME: It might be appropriate to extend this code to handle
5124 // mismatched types.
5128 // Record this extraction against the appropriate vector if possible...
5129 SDValue SourceVec = V.getOperand(0);
5130 // If the element number isn't a constant, we can't effectively
5131 // analyze what's going on.
5132 if (!isa<ConstantSDNode>(V.getOperand(1)))
5134 unsigned EltNo = cast<ConstantSDNode>(V.getOperand(1))->getZExtValue();
5135 bool FoundSource = false;
5136 for (unsigned j = 0; j < SourceVecs.size(); ++j) {
5137 if (SourceVecs[j] == SourceVec) {
5138 if (MinElts[j] > EltNo)
5140 if (MaxElts[j] < EltNo)
5147 // Or record a new source if not...
5149 SourceVecs.push_back(SourceVec);
5150 MinElts.push_back(EltNo);
5151 MaxElts.push_back(EltNo);
5155 // Currently only do something sane when at most two source vectors
5157 if (SourceVecs.size() > 2)
5160 SDValue ShuffleSrcs[2] = {DAG.getUNDEF(VT), DAG.getUNDEF(VT) };
5161 int VEXTOffsets[2] = {0, 0};
5163 // This loop extracts the usage patterns of the source vectors
5164 // and prepares appropriate SDValues for a shuffle if possible.
5165 for (unsigned i = 0; i < SourceVecs.size(); ++i) {
5166 if (SourceVecs[i].getValueType() == VT) {
5167 // No VEXT necessary
5168 ShuffleSrcs[i] = SourceVecs[i];
5171 } else if (SourceVecs[i].getValueType().getVectorNumElements() < NumElts) {
5172 // It probably isn't worth padding out a smaller vector just to
5173 // break it down again in a shuffle.
5177 // Since only 64-bit and 128-bit vectors are legal on ARM and
5178 // we've eliminated the other cases...
5179 assert(SourceVecs[i].getValueType().getVectorNumElements() == 2*NumElts &&
5180 "unexpected vector sizes in ReconstructShuffle");
5182 if (MaxElts[i] - MinElts[i] >= NumElts) {
5183 // Span too large for a VEXT to cope
5187 if (MinElts[i] >= NumElts) {
5188 // The extraction can just take the second half
5189 VEXTOffsets[i] = NumElts;
5190 ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
5192 DAG.getIntPtrConstant(NumElts));
5193 } else if (MaxElts[i] < NumElts) {
5194 // The extraction can just take the first half
5196 ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
5198 DAG.getIntPtrConstant(0));
5200 // An actual VEXT is needed
5201 VEXTOffsets[i] = MinElts[i];
5202 SDValue VEXTSrc1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
5204 DAG.getIntPtrConstant(0));
5205 SDValue VEXTSrc2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
5207 DAG.getIntPtrConstant(NumElts));
5208 ShuffleSrcs[i] = DAG.getNode(ARMISD::VEXT, dl, VT, VEXTSrc1, VEXTSrc2,
5209 DAG.getConstant(VEXTOffsets[i], MVT::i32));
5213 SmallVector<int, 8> Mask;
5215 for (unsigned i = 0; i < NumElts; ++i) {
5216 SDValue Entry = Op.getOperand(i);
5217 if (Entry.getOpcode() == ISD::UNDEF) {
5222 SDValue ExtractVec = Entry.getOperand(0);
5223 int ExtractElt = cast<ConstantSDNode>(Op.getOperand(i)
5224 .getOperand(1))->getSExtValue();
5225 if (ExtractVec == SourceVecs[0]) {
5226 Mask.push_back(ExtractElt - VEXTOffsets[0]);
5228 Mask.push_back(ExtractElt + NumElts - VEXTOffsets[1]);
5232 // Final check before we try to produce nonsense...
5233 if (isShuffleMaskLegal(Mask, VT))
5234 return DAG.getVectorShuffle(VT, dl, ShuffleSrcs[0], ShuffleSrcs[1],
5240 /// isShuffleMaskLegal - Targets can use this to indicate that they only
5241 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
5242 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
5243 /// are assumed to be legal.
5245 ARMTargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
5247 if (VT.getVectorNumElements() == 4 &&
5248 (VT.is128BitVector() || VT.is64BitVector())) {
5249 unsigned PFIndexes[4];
5250 for (unsigned i = 0; i != 4; ++i) {
5254 PFIndexes[i] = M[i];
5257 // Compute the index in the perfect shuffle table.
5258 unsigned PFTableIndex =
5259 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
5260 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
5261 unsigned Cost = (PFEntry >> 30);
5268 unsigned Imm, WhichResult;
5270 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
5271 return (EltSize >= 32 ||
5272 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
5273 isVREVMask(M, VT, 64) ||
5274 isVREVMask(M, VT, 32) ||
5275 isVREVMask(M, VT, 16) ||
5276 isVEXTMask(M, VT, ReverseVEXT, Imm) ||
5277 isVTBLMask(M, VT) ||
5278 isVTRNMask(M, VT, WhichResult) ||
5279 isVUZPMask(M, VT, WhichResult) ||
5280 isVZIPMask(M, VT, WhichResult) ||
5281 isVTRN_v_undef_Mask(M, VT, WhichResult) ||
5282 isVUZP_v_undef_Mask(M, VT, WhichResult) ||
5283 isVZIP_v_undef_Mask(M, VT, WhichResult) ||
5284 ((VT == MVT::v8i16 || VT == MVT::v16i8) && isReverseMask(M, VT)));
5287 /// GeneratePerfectShuffle - Given an entry in the perfect-shuffle table, emit
5288 /// the specified operations to build the shuffle.
5289 static SDValue GeneratePerfectShuffle(unsigned PFEntry, SDValue LHS,
5290 SDValue RHS, SelectionDAG &DAG,
5292 unsigned OpNum = (PFEntry >> 26) & 0x0F;
5293 unsigned LHSID = (PFEntry >> 13) & ((1 << 13)-1);
5294 unsigned RHSID = (PFEntry >> 0) & ((1 << 13)-1);
5297 OP_COPY = 0, // Copy, used for things like <u,u,u,3> to say it is <0,1,2,3>
5306 OP_VUZPL, // VUZP, left result
5307 OP_VUZPR, // VUZP, right result
5308 OP_VZIPL, // VZIP, left result
5309 OP_VZIPR, // VZIP, right result
5310 OP_VTRNL, // VTRN, left result
5311 OP_VTRNR // VTRN, right result
5314 if (OpNum == OP_COPY) {
5315 if (LHSID == (1*9+2)*9+3) return LHS;
5316 assert(LHSID == ((4*9+5)*9+6)*9+7 && "Illegal OP_COPY!");
5320 SDValue OpLHS, OpRHS;
5321 OpLHS = GeneratePerfectShuffle(PerfectShuffleTable[LHSID], LHS, RHS, DAG, dl);
5322 OpRHS = GeneratePerfectShuffle(PerfectShuffleTable[RHSID], LHS, RHS, DAG, dl);
5323 EVT VT = OpLHS.getValueType();
5326 default: llvm_unreachable("Unknown shuffle opcode!");
5328 // VREV divides the vector in half and swaps within the half.
5329 if (VT.getVectorElementType() == MVT::i32 ||
5330 VT.getVectorElementType() == MVT::f32)
5331 return DAG.getNode(ARMISD::VREV64, dl, VT, OpLHS);
5332 // vrev <4 x i16> -> VREV32
5333 if (VT.getVectorElementType() == MVT::i16)
5334 return DAG.getNode(ARMISD::VREV32, dl, VT, OpLHS);
5335 // vrev <4 x i8> -> VREV16
5336 assert(VT.getVectorElementType() == MVT::i8);
5337 return DAG.getNode(ARMISD::VREV16, dl, VT, OpLHS);
5342 return DAG.getNode(ARMISD::VDUPLANE, dl, VT,
5343 OpLHS, DAG.getConstant(OpNum-OP_VDUP0, MVT::i32));
5347 return DAG.getNode(ARMISD::VEXT, dl, VT,
5349 DAG.getConstant(OpNum-OP_VEXT1+1, MVT::i32));
5352 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
5353 OpLHS, OpRHS).getValue(OpNum-OP_VUZPL);
5356 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
5357 OpLHS, OpRHS).getValue(OpNum-OP_VZIPL);
5360 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
5361 OpLHS, OpRHS).getValue(OpNum-OP_VTRNL);
5365 static SDValue LowerVECTOR_SHUFFLEv8i8(SDValue Op,
5366 ArrayRef<int> ShuffleMask,
5367 SelectionDAG &DAG) {
5368 // Check to see if we can use the VTBL instruction.
5369 SDValue V1 = Op.getOperand(0);
5370 SDValue V2 = Op.getOperand(1);
5373 SmallVector<SDValue, 8> VTBLMask;
5374 for (ArrayRef<int>::iterator
5375 I = ShuffleMask.begin(), E = ShuffleMask.end(); I != E; ++I)
5376 VTBLMask.push_back(DAG.getConstant(*I, MVT::i32));
5378 if (V2.getNode()->getOpcode() == ISD::UNDEF)
5379 return DAG.getNode(ARMISD::VTBL1, DL, MVT::v8i8, V1,
5380 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8, VTBLMask));
5382 return DAG.getNode(ARMISD::VTBL2, DL, MVT::v8i8, V1, V2,
5383 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8, VTBLMask));
5386 static SDValue LowerReverse_VECTOR_SHUFFLEv16i8_v8i16(SDValue Op,
5387 SelectionDAG &DAG) {
5389 SDValue OpLHS = Op.getOperand(0);
5390 EVT VT = OpLHS.getValueType();
5392 assert((VT == MVT::v8i16 || VT == MVT::v16i8) &&
5393 "Expect an v8i16/v16i8 type");
5394 OpLHS = DAG.getNode(ARMISD::VREV64, DL, VT, OpLHS);
5395 // For a v16i8 type: After the VREV, we have got <8, ...15, 8, ..., 0>. Now,
5396 // extract the first 8 bytes into the top double word and the last 8 bytes
5397 // into the bottom double word. The v8i16 case is similar.
5398 unsigned ExtractNum = (VT == MVT::v16i8) ? 8 : 4;
5399 return DAG.getNode(ARMISD::VEXT, DL, VT, OpLHS, OpLHS,
5400 DAG.getConstant(ExtractNum, MVT::i32));
5403 static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
5404 SDValue V1 = Op.getOperand(0);
5405 SDValue V2 = Op.getOperand(1);
5407 EVT VT = Op.getValueType();
5408 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op.getNode());
5410 // Convert shuffles that are directly supported on NEON to target-specific
5411 // DAG nodes, instead of keeping them as shuffles and matching them again
5412 // during code selection. This is more efficient and avoids the possibility
5413 // of inconsistencies between legalization and selection.
5414 // FIXME: floating-point vectors should be canonicalized to integer vectors
5415 // of the same time so that they get CSEd properly.
5416 ArrayRef<int> ShuffleMask = SVN->getMask();
5418 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
5419 if (EltSize <= 32) {
5420 if (ShuffleVectorSDNode::isSplatMask(&ShuffleMask[0], VT)) {
5421 int Lane = SVN->getSplatIndex();
5422 // If this is undef splat, generate it via "just" vdup, if possible.
5423 if (Lane == -1) Lane = 0;
5425 // Test if V1 is a SCALAR_TO_VECTOR.
5426 if (Lane == 0 && V1.getOpcode() == ISD::SCALAR_TO_VECTOR) {
5427 return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
5429 // Test if V1 is a BUILD_VECTOR which is equivalent to a SCALAR_TO_VECTOR
5430 // (and probably will turn into a SCALAR_TO_VECTOR once legalization
5432 if (Lane == 0 && V1.getOpcode() == ISD::BUILD_VECTOR &&
5433 !isa<ConstantSDNode>(V1.getOperand(0))) {
5434 bool IsScalarToVector = true;
5435 for (unsigned i = 1, e = V1.getNumOperands(); i != e; ++i)
5436 if (V1.getOperand(i).getOpcode() != ISD::UNDEF) {
5437 IsScalarToVector = false;
5440 if (IsScalarToVector)
5441 return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
5443 return DAG.getNode(ARMISD::VDUPLANE, dl, VT, V1,
5444 DAG.getConstant(Lane, MVT::i32));
5449 if (isVEXTMask(ShuffleMask, VT, ReverseVEXT, Imm)) {
5452 return DAG.getNode(ARMISD::VEXT, dl, VT, V1, V2,
5453 DAG.getConstant(Imm, MVT::i32));
5456 if (isVREVMask(ShuffleMask, VT, 64))
5457 return DAG.getNode(ARMISD::VREV64, dl, VT, V1);
5458 if (isVREVMask(ShuffleMask, VT, 32))
5459 return DAG.getNode(ARMISD::VREV32, dl, VT, V1);
5460 if (isVREVMask(ShuffleMask, VT, 16))
5461 return DAG.getNode(ARMISD::VREV16, dl, VT, V1);
5463 if (V2->getOpcode() == ISD::UNDEF &&
5464 isSingletonVEXTMask(ShuffleMask, VT, Imm)) {
5465 return DAG.getNode(ARMISD::VEXT, dl, VT, V1, V1,
5466 DAG.getConstant(Imm, MVT::i32));
5469 // Check for Neon shuffles that modify both input vectors in place.
5470 // If both results are used, i.e., if there are two shuffles with the same
5471 // source operands and with masks corresponding to both results of one of
5472 // these operations, DAG memoization will ensure that a single node is
5473 // used for both shuffles.
5474 unsigned WhichResult;
5475 if (isVTRNMask(ShuffleMask, VT, WhichResult))
5476 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
5477 V1, V2).getValue(WhichResult);
5478 if (isVUZPMask(ShuffleMask, VT, WhichResult))
5479 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
5480 V1, V2).getValue(WhichResult);
5481 if (isVZIPMask(ShuffleMask, VT, WhichResult))
5482 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
5483 V1, V2).getValue(WhichResult);
5485 if (isVTRN_v_undef_Mask(ShuffleMask, VT, WhichResult))
5486 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
5487 V1, V1).getValue(WhichResult);
5488 if (isVUZP_v_undef_Mask(ShuffleMask, VT, WhichResult))
5489 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
5490 V1, V1).getValue(WhichResult);
5491 if (isVZIP_v_undef_Mask(ShuffleMask, VT, WhichResult))
5492 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
5493 V1, V1).getValue(WhichResult);
5496 // If the shuffle is not directly supported and it has 4 elements, use
5497 // the PerfectShuffle-generated table to synthesize it from other shuffles.
5498 unsigned NumElts = VT.getVectorNumElements();
5500 unsigned PFIndexes[4];
5501 for (unsigned i = 0; i != 4; ++i) {
5502 if (ShuffleMask[i] < 0)
5505 PFIndexes[i] = ShuffleMask[i];
5508 // Compute the index in the perfect shuffle table.
5509 unsigned PFTableIndex =
5510 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
5511 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
5512 unsigned Cost = (PFEntry >> 30);
5515 return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl);
5518 // Implement shuffles with 32- or 64-bit elements as ARMISD::BUILD_VECTORs.
5519 if (EltSize >= 32) {
5520 // Do the expansion with floating-point types, since that is what the VFP
5521 // registers are defined to use, and since i64 is not legal.
5522 EVT EltVT = EVT::getFloatingPointVT(EltSize);
5523 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
5524 V1 = DAG.getNode(ISD::BITCAST, dl, VecVT, V1);
5525 V2 = DAG.getNode(ISD::BITCAST, dl, VecVT, V2);
5526 SmallVector<SDValue, 8> Ops;
5527 for (unsigned i = 0; i < NumElts; ++i) {
5528 if (ShuffleMask[i] < 0)
5529 Ops.push_back(DAG.getUNDEF(EltVT));
5531 Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT,
5532 ShuffleMask[i] < (int)NumElts ? V1 : V2,
5533 DAG.getConstant(ShuffleMask[i] & (NumElts-1),
5536 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, Ops);
5537 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
5540 if ((VT == MVT::v8i16 || VT == MVT::v16i8) && isReverseMask(ShuffleMask, VT))
5541 return LowerReverse_VECTOR_SHUFFLEv16i8_v8i16(Op, DAG);
5543 if (VT == MVT::v8i8) {
5544 SDValue NewOp = LowerVECTOR_SHUFFLEv8i8(Op, ShuffleMask, DAG);
5545 if (NewOp.getNode())
5552 static SDValue LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
5553 // INSERT_VECTOR_ELT is legal only for immediate indexes.
5554 SDValue Lane = Op.getOperand(2);
5555 if (!isa<ConstantSDNode>(Lane))
5561 static SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
5562 // EXTRACT_VECTOR_ELT is legal only for immediate indexes.
5563 SDValue Lane = Op.getOperand(1);
5564 if (!isa<ConstantSDNode>(Lane))
5567 SDValue Vec = Op.getOperand(0);
5568 if (Op.getValueType() == MVT::i32 &&
5569 Vec.getValueType().getVectorElementType().getSizeInBits() < 32) {
5571 return DAG.getNode(ARMISD::VGETLANEu, dl, MVT::i32, Vec, Lane);
5577 static SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
5578 // The only time a CONCAT_VECTORS operation can have legal types is when
5579 // two 64-bit vectors are concatenated to a 128-bit vector.
5580 assert(Op.getValueType().is128BitVector() && Op.getNumOperands() == 2 &&
5581 "unexpected CONCAT_VECTORS");
5583 SDValue Val = DAG.getUNDEF(MVT::v2f64);
5584 SDValue Op0 = Op.getOperand(0);
5585 SDValue Op1 = Op.getOperand(1);
5586 if (Op0.getOpcode() != ISD::UNDEF)
5587 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
5588 DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op0),
5589 DAG.getIntPtrConstant(0));
5590 if (Op1.getOpcode() != ISD::UNDEF)
5591 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
5592 DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op1),
5593 DAG.getIntPtrConstant(1));
5594 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Val);
5597 /// isExtendedBUILD_VECTOR - Check if N is a constant BUILD_VECTOR where each
5598 /// element has been zero/sign-extended, depending on the isSigned parameter,
5599 /// from an integer type half its size.
5600 static bool isExtendedBUILD_VECTOR(SDNode *N, SelectionDAG &DAG,
5602 // A v2i64 BUILD_VECTOR will have been legalized to a BITCAST from v4i32.
5603 EVT VT = N->getValueType(0);
5604 if (VT == MVT::v2i64 && N->getOpcode() == ISD::BITCAST) {
5605 SDNode *BVN = N->getOperand(0).getNode();
5606 if (BVN->getValueType(0) != MVT::v4i32 ||
5607 BVN->getOpcode() != ISD::BUILD_VECTOR)
5609 unsigned LoElt = DAG.getTargetLoweringInfo().isBigEndian() ? 1 : 0;
5610 unsigned HiElt = 1 - LoElt;
5611 ConstantSDNode *Lo0 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt));
5612 ConstantSDNode *Hi0 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt));
5613 ConstantSDNode *Lo1 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt+2));
5614 ConstantSDNode *Hi1 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt+2));
5615 if (!Lo0 || !Hi0 || !Lo1 || !Hi1)
5618 if (Hi0->getSExtValue() == Lo0->getSExtValue() >> 32 &&
5619 Hi1->getSExtValue() == Lo1->getSExtValue() >> 32)
5622 if (Hi0->isNullValue() && Hi1->isNullValue())
5628 if (N->getOpcode() != ISD::BUILD_VECTOR)
5631 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
5632 SDNode *Elt = N->getOperand(i).getNode();
5633 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Elt)) {
5634 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
5635 unsigned HalfSize = EltSize / 2;
5637 if (!isIntN(HalfSize, C->getSExtValue()))
5640 if (!isUIntN(HalfSize, C->getZExtValue()))
5651 /// isSignExtended - Check if a node is a vector value that is sign-extended
5652 /// or a constant BUILD_VECTOR with sign-extended elements.
5653 static bool isSignExtended(SDNode *N, SelectionDAG &DAG) {
5654 if (N->getOpcode() == ISD::SIGN_EXTEND || ISD::isSEXTLoad(N))
5656 if (isExtendedBUILD_VECTOR(N, DAG, true))
5661 /// isZeroExtended - Check if a node is a vector value that is zero-extended
5662 /// or a constant BUILD_VECTOR with zero-extended elements.
5663 static bool isZeroExtended(SDNode *N, SelectionDAG &DAG) {
5664 if (N->getOpcode() == ISD::ZERO_EXTEND || ISD::isZEXTLoad(N))
5666 if (isExtendedBUILD_VECTOR(N, DAG, false))
5671 static EVT getExtensionTo64Bits(const EVT &OrigVT) {
5672 if (OrigVT.getSizeInBits() >= 64)
5675 assert(OrigVT.isSimple() && "Expecting a simple value type");
5677 MVT::SimpleValueType OrigSimpleTy = OrigVT.getSimpleVT().SimpleTy;
5678 switch (OrigSimpleTy) {
5679 default: llvm_unreachable("Unexpected Vector Type");
5688 /// AddRequiredExtensionForVMULL - Add a sign/zero extension to extend the total
5689 /// value size to 64 bits. We need a 64-bit D register as an operand to VMULL.
5690 /// We insert the required extension here to get the vector to fill a D register.
5691 static SDValue AddRequiredExtensionForVMULL(SDValue N, SelectionDAG &DAG,
5694 unsigned ExtOpcode) {
5695 // The vector originally had a size of OrigTy. It was then extended to ExtTy.
5696 // We expect the ExtTy to be 128-bits total. If the OrigTy is less than
5697 // 64-bits we need to insert a new extension so that it will be 64-bits.
5698 assert(ExtTy.is128BitVector() && "Unexpected extension size");
5699 if (OrigTy.getSizeInBits() >= 64)
5702 // Must extend size to at least 64 bits to be used as an operand for VMULL.
5703 EVT NewVT = getExtensionTo64Bits(OrigTy);
5705 return DAG.getNode(ExtOpcode, SDLoc(N), NewVT, N);
5708 /// SkipLoadExtensionForVMULL - return a load of the original vector size that
5709 /// does not do any sign/zero extension. If the original vector is less
5710 /// than 64 bits, an appropriate extension will be added after the load to
5711 /// reach a total size of 64 bits. We have to add the extension separately
5712 /// because ARM does not have a sign/zero extending load for vectors.
5713 static SDValue SkipLoadExtensionForVMULL(LoadSDNode *LD, SelectionDAG& DAG) {
5714 EVT ExtendedTy = getExtensionTo64Bits(LD->getMemoryVT());
5716 // The load already has the right type.
5717 if (ExtendedTy == LD->getMemoryVT())
5718 return DAG.getLoad(LD->getMemoryVT(), SDLoc(LD), LD->getChain(),
5719 LD->getBasePtr(), LD->getPointerInfo(), LD->isVolatile(),
5720 LD->isNonTemporal(), LD->isInvariant(),
5721 LD->getAlignment());
5723 // We need to create a zextload/sextload. We cannot just create a load
5724 // followed by a zext/zext node because LowerMUL is also run during normal
5725 // operation legalization where we can't create illegal types.
5726 return DAG.getExtLoad(LD->getExtensionType(), SDLoc(LD), ExtendedTy,
5727 LD->getChain(), LD->getBasePtr(), LD->getPointerInfo(),
5728 LD->getMemoryVT(), LD->isVolatile(),
5729 LD->isNonTemporal(), LD->getAlignment());
5732 /// SkipExtensionForVMULL - For a node that is a SIGN_EXTEND, ZERO_EXTEND,
5733 /// extending load, or BUILD_VECTOR with extended elements, return the
5734 /// unextended value. The unextended vector should be 64 bits so that it can
5735 /// be used as an operand to a VMULL instruction. If the original vector size
5736 /// before extension is less than 64 bits we add a an extension to resize
5737 /// the vector to 64 bits.
5738 static SDValue SkipExtensionForVMULL(SDNode *N, SelectionDAG &DAG) {
5739 if (N->getOpcode() == ISD::SIGN_EXTEND || N->getOpcode() == ISD::ZERO_EXTEND)
5740 return AddRequiredExtensionForVMULL(N->getOperand(0), DAG,
5741 N->getOperand(0)->getValueType(0),
5745 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N))
5746 return SkipLoadExtensionForVMULL(LD, DAG);
5748 // Otherwise, the value must be a BUILD_VECTOR. For v2i64, it will
5749 // have been legalized as a BITCAST from v4i32.
5750 if (N->getOpcode() == ISD::BITCAST) {
5751 SDNode *BVN = N->getOperand(0).getNode();
5752 assert(BVN->getOpcode() == ISD::BUILD_VECTOR &&
5753 BVN->getValueType(0) == MVT::v4i32 && "expected v4i32 BUILD_VECTOR");
5754 unsigned LowElt = DAG.getTargetLoweringInfo().isBigEndian() ? 1 : 0;
5755 return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(N), MVT::v2i32,
5756 BVN->getOperand(LowElt), BVN->getOperand(LowElt+2));
5758 // Construct a new BUILD_VECTOR with elements truncated to half the size.
5759 assert(N->getOpcode() == ISD::BUILD_VECTOR && "expected BUILD_VECTOR");
5760 EVT VT = N->getValueType(0);
5761 unsigned EltSize = VT.getVectorElementType().getSizeInBits() / 2;
5762 unsigned NumElts = VT.getVectorNumElements();
5763 MVT TruncVT = MVT::getIntegerVT(EltSize);
5764 SmallVector<SDValue, 8> Ops;
5765 for (unsigned i = 0; i != NumElts; ++i) {
5766 ConstantSDNode *C = cast<ConstantSDNode>(N->getOperand(i));
5767 const APInt &CInt = C->getAPIntValue();
5768 // Element types smaller than 32 bits are not legal, so use i32 elements.
5769 // The values are implicitly truncated so sext vs. zext doesn't matter.
5770 Ops.push_back(DAG.getConstant(CInt.zextOrTrunc(32), MVT::i32));
5772 return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(N),
5773 MVT::getVectorVT(TruncVT, NumElts), Ops);
5776 static bool isAddSubSExt(SDNode *N, SelectionDAG &DAG) {
5777 unsigned Opcode = N->getOpcode();
5778 if (Opcode == ISD::ADD || Opcode == ISD::SUB) {
5779 SDNode *N0 = N->getOperand(0).getNode();
5780 SDNode *N1 = N->getOperand(1).getNode();
5781 return N0->hasOneUse() && N1->hasOneUse() &&
5782 isSignExtended(N0, DAG) && isSignExtended(N1, DAG);
5787 static bool isAddSubZExt(SDNode *N, SelectionDAG &DAG) {
5788 unsigned Opcode = N->getOpcode();
5789 if (Opcode == ISD::ADD || Opcode == ISD::SUB) {
5790 SDNode *N0 = N->getOperand(0).getNode();
5791 SDNode *N1 = N->getOperand(1).getNode();
5792 return N0->hasOneUse() && N1->hasOneUse() &&
5793 isZeroExtended(N0, DAG) && isZeroExtended(N1, DAG);
5798 static SDValue LowerMUL(SDValue Op, SelectionDAG &DAG) {
5799 // Multiplications are only custom-lowered for 128-bit vectors so that
5800 // VMULL can be detected. Otherwise v2i64 multiplications are not legal.
5801 EVT VT = Op.getValueType();
5802 assert(VT.is128BitVector() && VT.isInteger() &&
5803 "unexpected type for custom-lowering ISD::MUL");
5804 SDNode *N0 = Op.getOperand(0).getNode();
5805 SDNode *N1 = Op.getOperand(1).getNode();
5806 unsigned NewOpc = 0;
5808 bool isN0SExt = isSignExtended(N0, DAG);
5809 bool isN1SExt = isSignExtended(N1, DAG);
5810 if (isN0SExt && isN1SExt)
5811 NewOpc = ARMISD::VMULLs;
5813 bool isN0ZExt = isZeroExtended(N0, DAG);
5814 bool isN1ZExt = isZeroExtended(N1, DAG);
5815 if (isN0ZExt && isN1ZExt)
5816 NewOpc = ARMISD::VMULLu;
5817 else if (isN1SExt || isN1ZExt) {
5818 // Look for (s/zext A + s/zext B) * (s/zext C). We want to turn these
5819 // into (s/zext A * s/zext C) + (s/zext B * s/zext C)
5820 if (isN1SExt && isAddSubSExt(N0, DAG)) {
5821 NewOpc = ARMISD::VMULLs;
5823 } else if (isN1ZExt && isAddSubZExt(N0, DAG)) {
5824 NewOpc = ARMISD::VMULLu;
5826 } else if (isN0ZExt && isAddSubZExt(N1, DAG)) {
5828 NewOpc = ARMISD::VMULLu;
5834 if (VT == MVT::v2i64)
5835 // Fall through to expand this. It is not legal.
5838 // Other vector multiplications are legal.
5843 // Legalize to a VMULL instruction.
5846 SDValue Op1 = SkipExtensionForVMULL(N1, DAG);
5848 Op0 = SkipExtensionForVMULL(N0, DAG);
5849 assert(Op0.getValueType().is64BitVector() &&
5850 Op1.getValueType().is64BitVector() &&
5851 "unexpected types for extended operands to VMULL");
5852 return DAG.getNode(NewOpc, DL, VT, Op0, Op1);
5855 // Optimizing (zext A + zext B) * C, to (VMULL A, C) + (VMULL B, C) during
5856 // isel lowering to take advantage of no-stall back to back vmul + vmla.
5863 SDValue N00 = SkipExtensionForVMULL(N0->getOperand(0).getNode(), DAG);
5864 SDValue N01 = SkipExtensionForVMULL(N0->getOperand(1).getNode(), DAG);
5865 EVT Op1VT = Op1.getValueType();
5866 return DAG.getNode(N0->getOpcode(), DL, VT,
5867 DAG.getNode(NewOpc, DL, VT,
5868 DAG.getNode(ISD::BITCAST, DL, Op1VT, N00), Op1),
5869 DAG.getNode(NewOpc, DL, VT,
5870 DAG.getNode(ISD::BITCAST, DL, Op1VT, N01), Op1));
5874 LowerSDIV_v4i8(SDValue X, SDValue Y, SDLoc dl, SelectionDAG &DAG) {
5876 // float4 xf = vcvt_f32_s32(vmovl_s16(a.lo));
5877 // float4 yf = vcvt_f32_s32(vmovl_s16(b.lo));
5878 X = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, X);
5879 Y = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, Y);
5880 X = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, X);
5881 Y = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, Y);
5882 // Get reciprocal estimate.
5883 // float4 recip = vrecpeq_f32(yf);
5884 Y = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
5885 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), Y);
5886 // Because char has a smaller range than uchar, we can actually get away
5887 // without any newton steps. This requires that we use a weird bias
5888 // of 0xb000, however (again, this has been exhaustively tested).
5889 // float4 result = as_float4(as_int4(xf*recip) + 0xb000);
5890 X = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, X, Y);
5891 X = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, X);
5892 Y = DAG.getConstant(0xb000, MVT::i32);
5893 Y = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Y, Y, Y, Y);
5894 X = DAG.getNode(ISD::ADD, dl, MVT::v4i32, X, Y);
5895 X = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, X);
5896 // Convert back to short.
5897 X = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, X);
5898 X = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, X);
5903 LowerSDIV_v4i16(SDValue N0, SDValue N1, SDLoc dl, SelectionDAG &DAG) {
5905 // Convert to float.
5906 // float4 yf = vcvt_f32_s32(vmovl_s16(y));
5907 // float4 xf = vcvt_f32_s32(vmovl_s16(x));
5908 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N0);
5909 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N1);
5910 N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0);
5911 N1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1);
5913 // Use reciprocal estimate and one refinement step.
5914 // float4 recip = vrecpeq_f32(yf);
5915 // recip *= vrecpsq_f32(yf, recip);
5916 N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
5917 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), N1);
5918 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
5919 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
5921 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
5922 // Because short has a smaller range than ushort, we can actually get away
5923 // with only a single newton step. This requires that we use a weird bias
5924 // of 89, however (again, this has been exhaustively tested).
5925 // float4 result = as_float4(as_int4(xf*recip) + 0x89);
5926 N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2);
5927 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0);
5928 N1 = DAG.getConstant(0x89, MVT::i32);
5929 N1 = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, N1, N1, N1, N1);
5930 N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1);
5931 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0);
5932 // Convert back to integer and return.
5933 // return vmovn_s32(vcvt_s32_f32(result));
5934 N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0);
5935 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0);
5939 static SDValue LowerSDIV(SDValue Op, SelectionDAG &DAG) {
5940 EVT VT = Op.getValueType();
5941 assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&
5942 "unexpected type for custom-lowering ISD::SDIV");
5945 SDValue N0 = Op.getOperand(0);
5946 SDValue N1 = Op.getOperand(1);
5949 if (VT == MVT::v8i8) {
5950 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N0);
5951 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N1);
5953 N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
5954 DAG.getIntPtrConstant(4));
5955 N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
5956 DAG.getIntPtrConstant(4));
5957 N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
5958 DAG.getIntPtrConstant(0));
5959 N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
5960 DAG.getIntPtrConstant(0));
5962 N0 = LowerSDIV_v4i8(N0, N1, dl, DAG); // v4i16
5963 N2 = LowerSDIV_v4i8(N2, N3, dl, DAG); // v4i16
5965 N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2);
5966 N0 = LowerCONCAT_VECTORS(N0, DAG);
5968 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v8i8, N0);
5971 return LowerSDIV_v4i16(N0, N1, dl, DAG);
5974 static SDValue LowerUDIV(SDValue Op, SelectionDAG &DAG) {
5975 EVT VT = Op.getValueType();
5976 assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&
5977 "unexpected type for custom-lowering ISD::UDIV");
5980 SDValue N0 = Op.getOperand(0);
5981 SDValue N1 = Op.getOperand(1);
5984 if (VT == MVT::v8i8) {
5985 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N0);
5986 N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N1);
5988 N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
5989 DAG.getIntPtrConstant(4));
5990 N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
5991 DAG.getIntPtrConstant(4));
5992 N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
5993 DAG.getIntPtrConstant(0));
5994 N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
5995 DAG.getIntPtrConstant(0));
5997 N0 = LowerSDIV_v4i16(N0, N1, dl, DAG); // v4i16
5998 N2 = LowerSDIV_v4i16(N2, N3, dl, DAG); // v4i16
6000 N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2);
6001 N0 = LowerCONCAT_VECTORS(N0, DAG);
6003 N0 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v8i8,
6004 DAG.getConstant(Intrinsic::arm_neon_vqmovnsu, MVT::i32),
6009 // v4i16 sdiv ... Convert to float.
6010 // float4 yf = vcvt_f32_s32(vmovl_u16(y));
6011 // float4 xf = vcvt_f32_s32(vmovl_u16(x));
6012 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N0);
6013 N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N1);
6014 N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0);
6015 SDValue BN1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1);
6017 // Use reciprocal estimate and two refinement steps.
6018 // float4 recip = vrecpeq_f32(yf);
6019 // recip *= vrecpsq_f32(yf, recip);
6020 // recip *= vrecpsq_f32(yf, recip);
6021 N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
6022 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), BN1);
6023 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
6024 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
6026 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
6027 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
6028 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
6030 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
6031 // Simply multiplying by the reciprocal estimate can leave us a few ulps
6032 // too low, so we add 2 ulps (exhaustive testing shows that this is enough,
6033 // and that it will never cause us to return an answer too large).
6034 // float4 result = as_float4(as_int4(xf*recip) + 2);
6035 N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2);
6036 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0);
6037 N1 = DAG.getConstant(2, MVT::i32);
6038 N1 = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, N1, N1, N1, N1);
6039 N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1);
6040 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0);
6041 // Convert back to integer and return.
6042 // return vmovn_u32(vcvt_s32_f32(result));
6043 N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0);
6044 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0);
6048 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
6049 EVT VT = Op.getNode()->getValueType(0);
6050 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
6053 bool ExtraOp = false;
6054 switch (Op.getOpcode()) {
6055 default: llvm_unreachable("Invalid code");
6056 case ISD::ADDC: Opc = ARMISD::ADDC; break;
6057 case ISD::ADDE: Opc = ARMISD::ADDE; ExtraOp = true; break;
6058 case ISD::SUBC: Opc = ARMISD::SUBC; break;
6059 case ISD::SUBE: Opc = ARMISD::SUBE; ExtraOp = true; break;
6063 return DAG.getNode(Opc, SDLoc(Op), VTs, Op.getOperand(0),
6065 return DAG.getNode(Opc, SDLoc(Op), VTs, Op.getOperand(0),
6066 Op.getOperand(1), Op.getOperand(2));
6069 SDValue ARMTargetLowering::LowerFSINCOS(SDValue Op, SelectionDAG &DAG) const {
6070 assert(Subtarget->isTargetDarwin());
6072 // For iOS, we want to call an alternative entry point: __sincos_stret,
6073 // return values are passed via sret.
6075 SDValue Arg = Op.getOperand(0);
6076 EVT ArgVT = Arg.getValueType();
6077 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
6079 MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo();
6080 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
6082 // Pair of floats / doubles used to pass the result.
6083 StructType *RetTy = StructType::get(ArgTy, ArgTy, NULL);
6085 // Create stack object for sret.
6086 const uint64_t ByteSize = TLI.getDataLayout()->getTypeAllocSize(RetTy);
6087 const unsigned StackAlign = TLI.getDataLayout()->getPrefTypeAlignment(RetTy);
6088 int FrameIdx = FrameInfo->CreateStackObject(ByteSize, StackAlign, false);
6089 SDValue SRet = DAG.getFrameIndex(FrameIdx, TLI.getPointerTy());
6095 Entry.Ty = RetTy->getPointerTo();
6096 Entry.isSExt = false;
6097 Entry.isZExt = false;
6098 Entry.isSRet = true;
6099 Args.push_back(Entry);
6103 Entry.isSExt = false;
6104 Entry.isZExt = false;
6105 Args.push_back(Entry);
6107 const char *LibcallName = (ArgVT == MVT::f64)
6108 ? "__sincos_stret" : "__sincosf_stret";
6109 SDValue Callee = DAG.getExternalSymbol(LibcallName, getPointerTy());
6112 CallLoweringInfo CLI(DAG.getEntryNode(), Type::getVoidTy(*DAG.getContext()),
6113 false, false, false, false, 0,
6114 CallingConv::C, /*isTaillCall=*/false,
6115 /*doesNotRet=*/false, /*isReturnValueUsed*/false,
6116 Callee, Args, DAG, dl);
6117 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
6119 SDValue LoadSin = DAG.getLoad(ArgVT, dl, CallResult.second, SRet,
6120 MachinePointerInfo(), false, false, false, 0);
6122 // Address of cos field.
6123 SDValue Add = DAG.getNode(ISD::ADD, dl, getPointerTy(), SRet,
6124 DAG.getIntPtrConstant(ArgVT.getStoreSize()));
6125 SDValue LoadCos = DAG.getLoad(ArgVT, dl, LoadSin.getValue(1), Add,
6126 MachinePointerInfo(), false, false, false, 0);
6128 SDVTList Tys = DAG.getVTList(ArgVT, ArgVT);
6129 return DAG.getNode(ISD::MERGE_VALUES, dl, Tys,
6130 LoadSin.getValue(0), LoadCos.getValue(0));
6133 static SDValue LowerAtomicLoadStore(SDValue Op, SelectionDAG &DAG) {
6134 // Monotonic load/store is legal for all targets
6135 if (cast<AtomicSDNode>(Op)->getOrdering() <= Monotonic)
6138 // Acquire/Release load/store is not legal for targets without a
6139 // dmb or equivalent available.
6143 static void ReplaceREADCYCLECOUNTER(SDNode *N,
6144 SmallVectorImpl<SDValue> &Results,
6146 const ARMSubtarget *Subtarget) {
6148 SDValue Cycles32, OutChain;
6150 if (Subtarget->hasPerfMon()) {
6151 // Under Power Management extensions, the cycle-count is:
6152 // mrc p15, #0, <Rt>, c9, c13, #0
6153 SDValue Ops[] = { N->getOperand(0), // Chain
6154 DAG.getConstant(Intrinsic::arm_mrc, MVT::i32),
6155 DAG.getConstant(15, MVT::i32),
6156 DAG.getConstant(0, MVT::i32),
6157 DAG.getConstant(9, MVT::i32),
6158 DAG.getConstant(13, MVT::i32),
6159 DAG.getConstant(0, MVT::i32)
6162 Cycles32 = DAG.getNode(ISD::INTRINSIC_W_CHAIN, DL,
6163 DAG.getVTList(MVT::i32, MVT::Other), Ops);
6164 OutChain = Cycles32.getValue(1);
6166 // Intrinsic is defined to return 0 on unsupported platforms. Technically
6167 // there are older ARM CPUs that have implementation-specific ways of
6168 // obtaining this information (FIXME!).
6169 Cycles32 = DAG.getConstant(0, MVT::i32);
6170 OutChain = DAG.getEntryNode();
6174 SDValue Cycles64 = DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64,
6175 Cycles32, DAG.getConstant(0, MVT::i32));
6176 Results.push_back(Cycles64);
6177 Results.push_back(OutChain);
6180 SDValue ARMTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
6181 switch (Op.getOpcode()) {
6182 default: llvm_unreachable("Don't know how to custom lower this!");
6183 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
6184 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
6185 case ISD::GlobalAddress:
6186 switch (Subtarget->getTargetTriple().getObjectFormat()) {
6187 default: llvm_unreachable("unknown object format");
6189 return LowerGlobalAddressWindows(Op, DAG);
6191 return LowerGlobalAddressELF(Op, DAG);
6193 return LowerGlobalAddressDarwin(Op, DAG);
6195 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
6196 case ISD::SELECT: return LowerSELECT(Op, DAG);
6197 case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
6198 case ISD::BR_CC: return LowerBR_CC(Op, DAG);
6199 case ISD::BR_JT: return LowerBR_JT(Op, DAG);
6200 case ISD::VASTART: return LowerVASTART(Op, DAG);
6201 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG, Subtarget);
6202 case ISD::PREFETCH: return LowerPREFETCH(Op, DAG, Subtarget);
6203 case ISD::SINT_TO_FP:
6204 case ISD::UINT_TO_FP: return LowerINT_TO_FP(Op, DAG);
6205 case ISD::FP_TO_SINT:
6206 case ISD::FP_TO_UINT: return LowerFP_TO_INT(Op, DAG);
6207 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
6208 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
6209 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
6210 case ISD::GLOBAL_OFFSET_TABLE: return LowerGLOBAL_OFFSET_TABLE(Op, DAG);
6211 case ISD::EH_SJLJ_SETJMP: return LowerEH_SJLJ_SETJMP(Op, DAG);
6212 case ISD::EH_SJLJ_LONGJMP: return LowerEH_SJLJ_LONGJMP(Op, DAG);
6213 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG,
6215 case ISD::BITCAST: return ExpandBITCAST(Op.getNode(), DAG);
6218 case ISD::SRA: return LowerShift(Op.getNode(), DAG, Subtarget);
6219 case ISD::SHL_PARTS: return LowerShiftLeftParts(Op, DAG);
6220 case ISD::SRL_PARTS:
6221 case ISD::SRA_PARTS: return LowerShiftRightParts(Op, DAG);
6222 case ISD::CTTZ: return LowerCTTZ(Op.getNode(), DAG, Subtarget);
6223 case ISD::CTPOP: return LowerCTPOP(Op.getNode(), DAG, Subtarget);
6224 case ISD::SETCC: return LowerVSETCC(Op, DAG);
6225 case ISD::ConstantFP: return LowerConstantFP(Op, DAG, Subtarget);
6226 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG, Subtarget);
6227 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
6228 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
6229 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
6230 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
6231 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
6232 case ISD::MUL: return LowerMUL(Op, DAG);
6233 case ISD::SDIV: return LowerSDIV(Op, DAG);
6234 case ISD::UDIV: return LowerUDIV(Op, DAG);
6238 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
6243 return LowerXALUO(Op, DAG);
6244 case ISD::ATOMIC_LOAD:
6245 case ISD::ATOMIC_STORE: return LowerAtomicLoadStore(Op, DAG);
6246 case ISD::FSINCOS: return LowerFSINCOS(Op, DAG);
6248 case ISD::UDIVREM: return LowerDivRem(Op, DAG);
6252 /// ReplaceNodeResults - Replace the results of node with an illegal result
6253 /// type with new values built out of custom code.
6254 void ARMTargetLowering::ReplaceNodeResults(SDNode *N,
6255 SmallVectorImpl<SDValue>&Results,
6256 SelectionDAG &DAG) const {
6258 switch (N->getOpcode()) {
6260 llvm_unreachable("Don't know how to custom expand this!");
6262 Res = ExpandBITCAST(N, DAG);
6266 Res = Expand64BitShift(N, DAG, Subtarget);
6268 case ISD::READCYCLECOUNTER:
6269 ReplaceREADCYCLECOUNTER(N, Results, DAG, Subtarget);
6273 Results.push_back(Res);
6276 //===----------------------------------------------------------------------===//
6277 // ARM Scheduler Hooks
6278 //===----------------------------------------------------------------------===//
6280 /// SetupEntryBlockForSjLj - Insert code into the entry block that creates and
6281 /// registers the function context.
6282 void ARMTargetLowering::
6283 SetupEntryBlockForSjLj(MachineInstr *MI, MachineBasicBlock *MBB,
6284 MachineBasicBlock *DispatchBB, int FI) const {
6285 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
6286 DebugLoc dl = MI->getDebugLoc();
6287 MachineFunction *MF = MBB->getParent();
6288 MachineRegisterInfo *MRI = &MF->getRegInfo();
6289 MachineConstantPool *MCP = MF->getConstantPool();
6290 ARMFunctionInfo *AFI = MF->getInfo<ARMFunctionInfo>();
6291 const Function *F = MF->getFunction();
6293 bool isThumb = Subtarget->isThumb();
6294 bool isThumb2 = Subtarget->isThumb2();
6296 unsigned PCLabelId = AFI->createPICLabelUId();
6297 unsigned PCAdj = (isThumb || isThumb2) ? 4 : 8;
6298 ARMConstantPoolValue *CPV =
6299 ARMConstantPoolMBB::Create(F->getContext(), DispatchBB, PCLabelId, PCAdj);
6300 unsigned CPI = MCP->getConstantPoolIndex(CPV, 4);
6302 const TargetRegisterClass *TRC = isThumb ?
6303 (const TargetRegisterClass*)&ARM::tGPRRegClass :
6304 (const TargetRegisterClass*)&ARM::GPRRegClass;
6306 // Grab constant pool and fixed stack memory operands.
6307 MachineMemOperand *CPMMO =
6308 MF->getMachineMemOperand(MachinePointerInfo::getConstantPool(),
6309 MachineMemOperand::MOLoad, 4, 4);
6311 MachineMemOperand *FIMMOSt =
6312 MF->getMachineMemOperand(MachinePointerInfo::getFixedStack(FI),
6313 MachineMemOperand::MOStore, 4, 4);
6315 // Load the address of the dispatch MBB into the jump buffer.
6317 // Incoming value: jbuf
6318 // ldr.n r5, LCPI1_1
6321 // str r5, [$jbuf, #+4] ; &jbuf[1]
6322 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
6323 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2LDRpci), NewVReg1)
6324 .addConstantPoolIndex(CPI)
6325 .addMemOperand(CPMMO));
6326 // Set the low bit because of thumb mode.
6327 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
6329 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2ORRri), NewVReg2)
6330 .addReg(NewVReg1, RegState::Kill)
6332 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
6333 BuildMI(*MBB, MI, dl, TII->get(ARM::tPICADD), NewVReg3)
6334 .addReg(NewVReg2, RegState::Kill)
6336 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2STRi12))
6337 .addReg(NewVReg3, RegState::Kill)
6339 .addImm(36) // &jbuf[1] :: pc
6340 .addMemOperand(FIMMOSt));
6341 } else if (isThumb) {
6342 // Incoming value: jbuf
6343 // ldr.n r1, LCPI1_4
6347 // add r2, $jbuf, #+4 ; &jbuf[1]
6349 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
6350 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tLDRpci), NewVReg1)
6351 .addConstantPoolIndex(CPI)
6352 .addMemOperand(CPMMO));
6353 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
6354 BuildMI(*MBB, MI, dl, TII->get(ARM::tPICADD), NewVReg2)
6355 .addReg(NewVReg1, RegState::Kill)
6357 // Set the low bit because of thumb mode.
6358 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
6359 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tMOVi8), NewVReg3)
6360 .addReg(ARM::CPSR, RegState::Define)
6362 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
6363 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tORR), NewVReg4)
6364 .addReg(ARM::CPSR, RegState::Define)
6365 .addReg(NewVReg2, RegState::Kill)
6366 .addReg(NewVReg3, RegState::Kill));
6367 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
6368 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tADDrSPi), NewVReg5)
6370 .addImm(36)); // &jbuf[1] :: pc
6371 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tSTRi))
6372 .addReg(NewVReg4, RegState::Kill)
6373 .addReg(NewVReg5, RegState::Kill)
6375 .addMemOperand(FIMMOSt));
6377 // Incoming value: jbuf
6380 // str r1, [$jbuf, #+4] ; &jbuf[1]
6381 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
6382 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::LDRi12), NewVReg1)
6383 .addConstantPoolIndex(CPI)
6385 .addMemOperand(CPMMO));
6386 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
6387 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::PICADD), NewVReg2)
6388 .addReg(NewVReg1, RegState::Kill)
6389 .addImm(PCLabelId));
6390 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::STRi12))
6391 .addReg(NewVReg2, RegState::Kill)
6393 .addImm(36) // &jbuf[1] :: pc
6394 .addMemOperand(FIMMOSt));
6398 MachineBasicBlock *ARMTargetLowering::
6399 EmitSjLjDispatchBlock(MachineInstr *MI, MachineBasicBlock *MBB) const {
6400 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
6401 DebugLoc dl = MI->getDebugLoc();
6402 MachineFunction *MF = MBB->getParent();
6403 MachineRegisterInfo *MRI = &MF->getRegInfo();
6404 ARMFunctionInfo *AFI = MF->getInfo<ARMFunctionInfo>();
6405 MachineFrameInfo *MFI = MF->getFrameInfo();
6406 int FI = MFI->getFunctionContextIndex();
6408 const TargetRegisterClass *TRC = Subtarget->isThumb() ?
6409 (const TargetRegisterClass*)&ARM::tGPRRegClass :
6410 (const TargetRegisterClass*)&ARM::GPRnopcRegClass;
6412 // Get a mapping of the call site numbers to all of the landing pads they're
6414 DenseMap<unsigned, SmallVector<MachineBasicBlock*, 2> > CallSiteNumToLPad;
6415 unsigned MaxCSNum = 0;
6416 MachineModuleInfo &MMI = MF->getMMI();
6417 for (MachineFunction::iterator BB = MF->begin(), E = MF->end(); BB != E;
6419 if (!BB->isLandingPad()) continue;
6421 // FIXME: We should assert that the EH_LABEL is the first MI in the landing
6423 for (MachineBasicBlock::iterator
6424 II = BB->begin(), IE = BB->end(); II != IE; ++II) {
6425 if (!II->isEHLabel()) continue;
6427 MCSymbol *Sym = II->getOperand(0).getMCSymbol();
6428 if (!MMI.hasCallSiteLandingPad(Sym)) continue;
6430 SmallVectorImpl<unsigned> &CallSiteIdxs = MMI.getCallSiteLandingPad(Sym);
6431 for (SmallVectorImpl<unsigned>::iterator
6432 CSI = CallSiteIdxs.begin(), CSE = CallSiteIdxs.end();
6433 CSI != CSE; ++CSI) {
6434 CallSiteNumToLPad[*CSI].push_back(BB);
6435 MaxCSNum = std::max(MaxCSNum, *CSI);
6441 // Get an ordered list of the machine basic blocks for the jump table.
6442 std::vector<MachineBasicBlock*> LPadList;
6443 SmallPtrSet<MachineBasicBlock*, 64> InvokeBBs;
6444 LPadList.reserve(CallSiteNumToLPad.size());
6445 for (unsigned I = 1; I <= MaxCSNum; ++I) {
6446 SmallVectorImpl<MachineBasicBlock*> &MBBList = CallSiteNumToLPad[I];
6447 for (SmallVectorImpl<MachineBasicBlock*>::iterator
6448 II = MBBList.begin(), IE = MBBList.end(); II != IE; ++II) {
6449 LPadList.push_back(*II);
6450 InvokeBBs.insert((*II)->pred_begin(), (*II)->pred_end());
6454 assert(!LPadList.empty() &&
6455 "No landing pad destinations for the dispatch jump table!");
6457 // Create the jump table and associated information.
6458 MachineJumpTableInfo *JTI =
6459 MF->getOrCreateJumpTableInfo(MachineJumpTableInfo::EK_Inline);
6460 unsigned MJTI = JTI->createJumpTableIndex(LPadList);
6461 unsigned UId = AFI->createJumpTableUId();
6462 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
6464 // Create the MBBs for the dispatch code.
6466 // Shove the dispatch's address into the return slot in the function context.
6467 MachineBasicBlock *DispatchBB = MF->CreateMachineBasicBlock();
6468 DispatchBB->setIsLandingPad();
6470 MachineBasicBlock *TrapBB = MF->CreateMachineBasicBlock();
6471 unsigned trap_opcode;
6472 if (Subtarget->isThumb())
6473 trap_opcode = ARM::tTRAP;
6475 trap_opcode = Subtarget->useNaClTrap() ? ARM::TRAPNaCl : ARM::TRAP;
6477 BuildMI(TrapBB, dl, TII->get(trap_opcode));
6478 DispatchBB->addSuccessor(TrapBB);
6480 MachineBasicBlock *DispContBB = MF->CreateMachineBasicBlock();
6481 DispatchBB->addSuccessor(DispContBB);
6484 MF->insert(MF->end(), DispatchBB);
6485 MF->insert(MF->end(), DispContBB);
6486 MF->insert(MF->end(), TrapBB);
6488 // Insert code into the entry block that creates and registers the function
6490 SetupEntryBlockForSjLj(MI, MBB, DispatchBB, FI);
6492 MachineMemOperand *FIMMOLd =
6493 MF->getMachineMemOperand(MachinePointerInfo::getFixedStack(FI),
6494 MachineMemOperand::MOLoad |
6495 MachineMemOperand::MOVolatile, 4, 4);
6497 MachineInstrBuilder MIB;
6498 MIB = BuildMI(DispatchBB, dl, TII->get(ARM::Int_eh_sjlj_dispatchsetup));
6500 const ARMBaseInstrInfo *AII = static_cast<const ARMBaseInstrInfo*>(TII);
6501 const ARMBaseRegisterInfo &RI = AII->getRegisterInfo();
6503 // Add a register mask with no preserved registers. This results in all
6504 // registers being marked as clobbered.
6505 MIB.addRegMask(RI.getNoPreservedMask());
6507 unsigned NumLPads = LPadList.size();
6508 if (Subtarget->isThumb2()) {
6509 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
6510 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2LDRi12), NewVReg1)
6513 .addMemOperand(FIMMOLd));
6515 if (NumLPads < 256) {
6516 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPri))
6518 .addImm(LPadList.size()));
6520 unsigned VReg1 = MRI->createVirtualRegister(TRC);
6521 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2MOVi16), VReg1)
6522 .addImm(NumLPads & 0xFFFF));
6524 unsigned VReg2 = VReg1;
6525 if ((NumLPads & 0xFFFF0000) != 0) {
6526 VReg2 = MRI->createVirtualRegister(TRC);
6527 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2MOVTi16), VReg2)
6529 .addImm(NumLPads >> 16));
6532 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPrr))
6537 BuildMI(DispatchBB, dl, TII->get(ARM::t2Bcc))
6542 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
6543 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::t2LEApcrelJT),NewVReg3)
6544 .addJumpTableIndex(MJTI)
6547 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
6550 BuildMI(DispContBB, dl, TII->get(ARM::t2ADDrs), NewVReg4)
6551 .addReg(NewVReg3, RegState::Kill)
6553 .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, 2))));
6555 BuildMI(DispContBB, dl, TII->get(ARM::t2BR_JT))
6556 .addReg(NewVReg4, RegState::Kill)
6558 .addJumpTableIndex(MJTI)
6560 } else if (Subtarget->isThumb()) {
6561 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
6562 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tLDRspi), NewVReg1)
6565 .addMemOperand(FIMMOLd));
6567 if (NumLPads < 256) {
6568 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tCMPi8))
6572 MachineConstantPool *ConstantPool = MF->getConstantPool();
6573 Type *Int32Ty = Type::getInt32Ty(MF->getFunction()->getContext());
6574 const Constant *C = ConstantInt::get(Int32Ty, NumLPads);
6576 // MachineConstantPool wants an explicit alignment.
6577 unsigned Align = getDataLayout()->getPrefTypeAlignment(Int32Ty);
6579 Align = getDataLayout()->getTypeAllocSize(C->getType());
6580 unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align);
6582 unsigned VReg1 = MRI->createVirtualRegister(TRC);
6583 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tLDRpci))
6584 .addReg(VReg1, RegState::Define)
6585 .addConstantPoolIndex(Idx));
6586 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tCMPr))
6591 BuildMI(DispatchBB, dl, TII->get(ARM::tBcc))
6596 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
6597 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLSLri), NewVReg2)
6598 .addReg(ARM::CPSR, RegState::Define)
6602 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
6603 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLEApcrelJT), NewVReg3)
6604 .addJumpTableIndex(MJTI)
6607 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
6608 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tADDrr), NewVReg4)
6609 .addReg(ARM::CPSR, RegState::Define)
6610 .addReg(NewVReg2, RegState::Kill)
6613 MachineMemOperand *JTMMOLd =
6614 MF->getMachineMemOperand(MachinePointerInfo::getJumpTable(),
6615 MachineMemOperand::MOLoad, 4, 4);
6617 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
6618 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLDRi), NewVReg5)
6619 .addReg(NewVReg4, RegState::Kill)
6621 .addMemOperand(JTMMOLd));
6623 unsigned NewVReg6 = NewVReg5;
6624 if (RelocM == Reloc::PIC_) {
6625 NewVReg6 = MRI->createVirtualRegister(TRC);
6626 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tADDrr), NewVReg6)
6627 .addReg(ARM::CPSR, RegState::Define)
6628 .addReg(NewVReg5, RegState::Kill)
6632 BuildMI(DispContBB, dl, TII->get(ARM::tBR_JTr))
6633 .addReg(NewVReg6, RegState::Kill)
6634 .addJumpTableIndex(MJTI)
6637 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
6638 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::LDRi12), NewVReg1)
6641 .addMemOperand(FIMMOLd));
6643 if (NumLPads < 256) {
6644 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPri))
6647 } else if (Subtarget->hasV6T2Ops() && isUInt<16>(NumLPads)) {
6648 unsigned VReg1 = MRI->createVirtualRegister(TRC);
6649 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::MOVi16), VReg1)
6650 .addImm(NumLPads & 0xFFFF));
6652 unsigned VReg2 = VReg1;
6653 if ((NumLPads & 0xFFFF0000) != 0) {
6654 VReg2 = MRI->createVirtualRegister(TRC);
6655 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::MOVTi16), VReg2)
6657 .addImm(NumLPads >> 16));
6660 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPrr))
6664 MachineConstantPool *ConstantPool = MF->getConstantPool();
6665 Type *Int32Ty = Type::getInt32Ty(MF->getFunction()->getContext());
6666 const Constant *C = ConstantInt::get(Int32Ty, NumLPads);
6668 // MachineConstantPool wants an explicit alignment.
6669 unsigned Align = getDataLayout()->getPrefTypeAlignment(Int32Ty);
6671 Align = getDataLayout()->getTypeAllocSize(C->getType());
6672 unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align);
6674 unsigned VReg1 = MRI->createVirtualRegister(TRC);
6675 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::LDRcp))
6676 .addReg(VReg1, RegState::Define)
6677 .addConstantPoolIndex(Idx)
6679 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPrr))
6681 .addReg(VReg1, RegState::Kill));
6684 BuildMI(DispatchBB, dl, TII->get(ARM::Bcc))
6689 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
6691 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::MOVsi), NewVReg3)
6693 .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, 2))));
6694 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
6695 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::LEApcrelJT), NewVReg4)
6696 .addJumpTableIndex(MJTI)
6699 MachineMemOperand *JTMMOLd =
6700 MF->getMachineMemOperand(MachinePointerInfo::getJumpTable(),
6701 MachineMemOperand::MOLoad, 4, 4);
6702 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
6704 BuildMI(DispContBB, dl, TII->get(ARM::LDRrs), NewVReg5)
6705 .addReg(NewVReg3, RegState::Kill)
6708 .addMemOperand(JTMMOLd));
6710 if (RelocM == Reloc::PIC_) {
6711 BuildMI(DispContBB, dl, TII->get(ARM::BR_JTadd))
6712 .addReg(NewVReg5, RegState::Kill)
6714 .addJumpTableIndex(MJTI)
6717 BuildMI(DispContBB, dl, TII->get(ARM::BR_JTr))
6718 .addReg(NewVReg5, RegState::Kill)
6719 .addJumpTableIndex(MJTI)
6724 // Add the jump table entries as successors to the MBB.
6725 SmallPtrSet<MachineBasicBlock*, 8> SeenMBBs;
6726 for (std::vector<MachineBasicBlock*>::iterator
6727 I = LPadList.begin(), E = LPadList.end(); I != E; ++I) {
6728 MachineBasicBlock *CurMBB = *I;
6729 if (SeenMBBs.insert(CurMBB))
6730 DispContBB->addSuccessor(CurMBB);
6733 // N.B. the order the invoke BBs are processed in doesn't matter here.
6734 const MCPhysReg *SavedRegs = RI.getCalleeSavedRegs(MF);
6735 SmallVector<MachineBasicBlock*, 64> MBBLPads;
6736 for (SmallPtrSet<MachineBasicBlock*, 64>::iterator
6737 I = InvokeBBs.begin(), E = InvokeBBs.end(); I != E; ++I) {
6738 MachineBasicBlock *BB = *I;
6740 // Remove the landing pad successor from the invoke block and replace it
6741 // with the new dispatch block.
6742 SmallVector<MachineBasicBlock*, 4> Successors(BB->succ_begin(),
6744 while (!Successors.empty()) {
6745 MachineBasicBlock *SMBB = Successors.pop_back_val();
6746 if (SMBB->isLandingPad()) {
6747 BB->removeSuccessor(SMBB);
6748 MBBLPads.push_back(SMBB);
6752 BB->addSuccessor(DispatchBB);
6754 // Find the invoke call and mark all of the callee-saved registers as
6755 // 'implicit defined' so that they're spilled. This prevents code from
6756 // moving instructions to before the EH block, where they will never be
6758 for (MachineBasicBlock::reverse_iterator
6759 II = BB->rbegin(), IE = BB->rend(); II != IE; ++II) {
6760 if (!II->isCall()) continue;
6762 DenseMap<unsigned, bool> DefRegs;
6763 for (MachineInstr::mop_iterator
6764 OI = II->operands_begin(), OE = II->operands_end();
6766 if (!OI->isReg()) continue;
6767 DefRegs[OI->getReg()] = true;
6770 MachineInstrBuilder MIB(*MF, &*II);
6772 for (unsigned i = 0; SavedRegs[i] != 0; ++i) {
6773 unsigned Reg = SavedRegs[i];
6774 if (Subtarget->isThumb2() &&
6775 !ARM::tGPRRegClass.contains(Reg) &&
6776 !ARM::hGPRRegClass.contains(Reg))
6778 if (Subtarget->isThumb1Only() && !ARM::tGPRRegClass.contains(Reg))
6780 if (!Subtarget->isThumb() && !ARM::GPRRegClass.contains(Reg))
6783 MIB.addReg(Reg, RegState::ImplicitDefine | RegState::Dead);
6790 // Mark all former landing pads as non-landing pads. The dispatch is the only
6792 for (SmallVectorImpl<MachineBasicBlock*>::iterator
6793 I = MBBLPads.begin(), E = MBBLPads.end(); I != E; ++I)
6794 (*I)->setIsLandingPad(false);
6796 // The instruction is gone now.
6797 MI->eraseFromParent();
6803 MachineBasicBlock *OtherSucc(MachineBasicBlock *MBB, MachineBasicBlock *Succ) {
6804 for (MachineBasicBlock::succ_iterator I = MBB->succ_begin(),
6805 E = MBB->succ_end(); I != E; ++I)
6808 llvm_unreachable("Expecting a BB with two successors!");
6811 /// Return the load opcode for a given load size. If load size >= 8,
6812 /// neon opcode will be returned.
6813 static unsigned getLdOpcode(unsigned LdSize, bool IsThumb1, bool IsThumb2) {
6815 return LdSize == 16 ? ARM::VLD1q32wb_fixed
6816 : LdSize == 8 ? ARM::VLD1d32wb_fixed : 0;
6818 return LdSize == 4 ? ARM::tLDRi
6819 : LdSize == 2 ? ARM::tLDRHi
6820 : LdSize == 1 ? ARM::tLDRBi : 0;
6822 return LdSize == 4 ? ARM::t2LDR_POST
6823 : LdSize == 2 ? ARM::t2LDRH_POST
6824 : LdSize == 1 ? ARM::t2LDRB_POST : 0;
6825 return LdSize == 4 ? ARM::LDR_POST_IMM
6826 : LdSize == 2 ? ARM::LDRH_POST
6827 : LdSize == 1 ? ARM::LDRB_POST_IMM : 0;
6830 /// Return the store opcode for a given store size. If store size >= 8,
6831 /// neon opcode will be returned.
6832 static unsigned getStOpcode(unsigned StSize, bool IsThumb1, bool IsThumb2) {
6834 return StSize == 16 ? ARM::VST1q32wb_fixed
6835 : StSize == 8 ? ARM::VST1d32wb_fixed : 0;
6837 return StSize == 4 ? ARM::tSTRi
6838 : StSize == 2 ? ARM::tSTRHi
6839 : StSize == 1 ? ARM::tSTRBi : 0;
6841 return StSize == 4 ? ARM::t2STR_POST
6842 : StSize == 2 ? ARM::t2STRH_POST
6843 : StSize == 1 ? ARM::t2STRB_POST : 0;
6844 return StSize == 4 ? ARM::STR_POST_IMM
6845 : StSize == 2 ? ARM::STRH_POST
6846 : StSize == 1 ? ARM::STRB_POST_IMM : 0;
6849 /// Emit a post-increment load operation with given size. The instructions
6850 /// will be added to BB at Pos.
6851 static void emitPostLd(MachineBasicBlock *BB, MachineInstr *Pos,
6852 const TargetInstrInfo *TII, DebugLoc dl,
6853 unsigned LdSize, unsigned Data, unsigned AddrIn,
6854 unsigned AddrOut, bool IsThumb1, bool IsThumb2) {
6855 unsigned LdOpc = getLdOpcode(LdSize, IsThumb1, IsThumb2);
6856 assert(LdOpc != 0 && "Should have a load opcode");
6858 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(LdOpc), Data)
6859 .addReg(AddrOut, RegState::Define).addReg(AddrIn)
6861 } else if (IsThumb1) {
6862 // load + update AddrIn
6863 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(LdOpc), Data)
6864 .addReg(AddrIn).addImm(0));
6865 MachineInstrBuilder MIB =
6866 BuildMI(*BB, Pos, dl, TII->get(ARM::tADDi8), AddrOut);
6867 MIB = AddDefaultT1CC(MIB);
6868 MIB.addReg(AddrIn).addImm(LdSize);
6869 AddDefaultPred(MIB);
6870 } else if (IsThumb2) {
6871 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(LdOpc), Data)
6872 .addReg(AddrOut, RegState::Define).addReg(AddrIn)
6875 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(LdOpc), Data)
6876 .addReg(AddrOut, RegState::Define).addReg(AddrIn)
6877 .addReg(0).addImm(LdSize));
6881 /// Emit a post-increment store operation with given size. The instructions
6882 /// will be added to BB at Pos.
6883 static void emitPostSt(MachineBasicBlock *BB, MachineInstr *Pos,
6884 const TargetInstrInfo *TII, DebugLoc dl,
6885 unsigned StSize, unsigned Data, unsigned AddrIn,
6886 unsigned AddrOut, bool IsThumb1, bool IsThumb2) {
6887 unsigned StOpc = getStOpcode(StSize, IsThumb1, IsThumb2);
6888 assert(StOpc != 0 && "Should have a store opcode");
6890 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(StOpc), AddrOut)
6891 .addReg(AddrIn).addImm(0).addReg(Data));
6892 } else if (IsThumb1) {
6893 // store + update AddrIn
6894 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(StOpc)).addReg(Data)
6895 .addReg(AddrIn).addImm(0));
6896 MachineInstrBuilder MIB =
6897 BuildMI(*BB, Pos, dl, TII->get(ARM::tADDi8), AddrOut);
6898 MIB = AddDefaultT1CC(MIB);
6899 MIB.addReg(AddrIn).addImm(StSize);
6900 AddDefaultPred(MIB);
6901 } else if (IsThumb2) {
6902 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(StOpc), AddrOut)
6903 .addReg(Data).addReg(AddrIn).addImm(StSize));
6905 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(StOpc), AddrOut)
6906 .addReg(Data).addReg(AddrIn).addReg(0)
6912 ARMTargetLowering::EmitStructByval(MachineInstr *MI,
6913 MachineBasicBlock *BB) const {
6914 // This pseudo instruction has 3 operands: dst, src, size
6915 // We expand it to a loop if size > Subtarget->getMaxInlineSizeThreshold().
6916 // Otherwise, we will generate unrolled scalar copies.
6917 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
6918 const BasicBlock *LLVM_BB = BB->getBasicBlock();
6919 MachineFunction::iterator It = BB;
6922 unsigned dest = MI->getOperand(0).getReg();
6923 unsigned src = MI->getOperand(1).getReg();
6924 unsigned SizeVal = MI->getOperand(2).getImm();
6925 unsigned Align = MI->getOperand(3).getImm();
6926 DebugLoc dl = MI->getDebugLoc();
6928 MachineFunction *MF = BB->getParent();
6929 MachineRegisterInfo &MRI = MF->getRegInfo();
6930 unsigned UnitSize = 0;
6931 const TargetRegisterClass *TRC = nullptr;
6932 const TargetRegisterClass *VecTRC = nullptr;
6934 bool IsThumb1 = Subtarget->isThumb1Only();
6935 bool IsThumb2 = Subtarget->isThumb2();
6939 } else if (Align & 2) {
6942 // Check whether we can use NEON instructions.
6943 if (!MF->getFunction()->getAttributes().
6944 hasAttribute(AttributeSet::FunctionIndex,
6945 Attribute::NoImplicitFloat) &&
6946 Subtarget->hasNEON()) {
6947 if ((Align % 16 == 0) && SizeVal >= 16)
6949 else if ((Align % 8 == 0) && SizeVal >= 8)
6952 // Can't use NEON instructions.
6957 // Select the correct opcode and register class for unit size load/store
6958 bool IsNeon = UnitSize >= 8;
6959 TRC = (IsThumb1 || IsThumb2) ? (const TargetRegisterClass *)&ARM::tGPRRegClass
6960 : (const TargetRegisterClass *)&ARM::GPRRegClass;
6962 VecTRC = UnitSize == 16
6963 ? (const TargetRegisterClass *)&ARM::DPairRegClass
6965 ? (const TargetRegisterClass *)&ARM::DPRRegClass
6968 unsigned BytesLeft = SizeVal % UnitSize;
6969 unsigned LoopSize = SizeVal - BytesLeft;
6971 if (SizeVal <= Subtarget->getMaxInlineSizeThreshold()) {
6972 // Use LDR and STR to copy.
6973 // [scratch, srcOut] = LDR_POST(srcIn, UnitSize)
6974 // [destOut] = STR_POST(scratch, destIn, UnitSize)
6975 unsigned srcIn = src;
6976 unsigned destIn = dest;
6977 for (unsigned i = 0; i < LoopSize; i+=UnitSize) {
6978 unsigned srcOut = MRI.createVirtualRegister(TRC);
6979 unsigned destOut = MRI.createVirtualRegister(TRC);
6980 unsigned scratch = MRI.createVirtualRegister(IsNeon ? VecTRC : TRC);
6981 emitPostLd(BB, MI, TII, dl, UnitSize, scratch, srcIn, srcOut,
6982 IsThumb1, IsThumb2);
6983 emitPostSt(BB, MI, TII, dl, UnitSize, scratch, destIn, destOut,
6984 IsThumb1, IsThumb2);
6989 // Handle the leftover bytes with LDRB and STRB.
6990 // [scratch, srcOut] = LDRB_POST(srcIn, 1)
6991 // [destOut] = STRB_POST(scratch, destIn, 1)
6992 for (unsigned i = 0; i < BytesLeft; i++) {
6993 unsigned srcOut = MRI.createVirtualRegister(TRC);
6994 unsigned destOut = MRI.createVirtualRegister(TRC);
6995 unsigned scratch = MRI.createVirtualRegister(TRC);
6996 emitPostLd(BB, MI, TII, dl, 1, scratch, srcIn, srcOut,
6997 IsThumb1, IsThumb2);
6998 emitPostSt(BB, MI, TII, dl, 1, scratch, destIn, destOut,
6999 IsThumb1, IsThumb2);
7003 MI->eraseFromParent(); // The instruction is gone now.
7007 // Expand the pseudo op to a loop.
7010 // movw varEnd, # --> with thumb2
7012 // ldrcp varEnd, idx --> without thumb2
7013 // fallthrough --> loopMBB
7015 // PHI varPhi, varEnd, varLoop
7016 // PHI srcPhi, src, srcLoop
7017 // PHI destPhi, dst, destLoop
7018 // [scratch, srcLoop] = LDR_POST(srcPhi, UnitSize)
7019 // [destLoop] = STR_POST(scratch, destPhi, UnitSize)
7020 // subs varLoop, varPhi, #UnitSize
7022 // fallthrough --> exitMBB
7024 // epilogue to handle left-over bytes
7025 // [scratch, srcOut] = LDRB_POST(srcLoop, 1)
7026 // [destOut] = STRB_POST(scratch, destLoop, 1)
7027 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
7028 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
7029 MF->insert(It, loopMBB);
7030 MF->insert(It, exitMBB);
7032 // Transfer the remainder of BB and its successor edges to exitMBB.
7033 exitMBB->splice(exitMBB->begin(), BB,
7034 std::next(MachineBasicBlock::iterator(MI)), BB->end());
7035 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
7037 // Load an immediate to varEnd.
7038 unsigned varEnd = MRI.createVirtualRegister(TRC);
7040 unsigned Vtmp = varEnd;
7041 if ((LoopSize & 0xFFFF0000) != 0)
7042 Vtmp = MRI.createVirtualRegister(TRC);
7043 AddDefaultPred(BuildMI(BB, dl, TII->get(ARM::t2MOVi16), Vtmp)
7044 .addImm(LoopSize & 0xFFFF));
7046 if ((LoopSize & 0xFFFF0000) != 0)
7047 AddDefaultPred(BuildMI(BB, dl, TII->get(ARM::t2MOVTi16), varEnd)
7048 .addReg(Vtmp).addImm(LoopSize >> 16));
7050 MachineConstantPool *ConstantPool = MF->getConstantPool();
7051 Type *Int32Ty = Type::getInt32Ty(MF->getFunction()->getContext());
7052 const Constant *C = ConstantInt::get(Int32Ty, LoopSize);
7054 // MachineConstantPool wants an explicit alignment.
7055 unsigned Align = getDataLayout()->getPrefTypeAlignment(Int32Ty);
7057 Align = getDataLayout()->getTypeAllocSize(C->getType());
7058 unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align);
7061 AddDefaultPred(BuildMI(*BB, MI, dl, TII->get(ARM::tLDRpci)).addReg(
7062 varEnd, RegState::Define).addConstantPoolIndex(Idx));
7064 AddDefaultPred(BuildMI(*BB, MI, dl, TII->get(ARM::LDRcp)).addReg(
7065 varEnd, RegState::Define).addConstantPoolIndex(Idx).addImm(0));
7067 BB->addSuccessor(loopMBB);
7069 // Generate the loop body:
7070 // varPhi = PHI(varLoop, varEnd)
7071 // srcPhi = PHI(srcLoop, src)
7072 // destPhi = PHI(destLoop, dst)
7073 MachineBasicBlock *entryBB = BB;
7075 unsigned varLoop = MRI.createVirtualRegister(TRC);
7076 unsigned varPhi = MRI.createVirtualRegister(TRC);
7077 unsigned srcLoop = MRI.createVirtualRegister(TRC);
7078 unsigned srcPhi = MRI.createVirtualRegister(TRC);
7079 unsigned destLoop = MRI.createVirtualRegister(TRC);
7080 unsigned destPhi = MRI.createVirtualRegister(TRC);
7082 BuildMI(*BB, BB->begin(), dl, TII->get(ARM::PHI), varPhi)
7083 .addReg(varLoop).addMBB(loopMBB)
7084 .addReg(varEnd).addMBB(entryBB);
7085 BuildMI(BB, dl, TII->get(ARM::PHI), srcPhi)
7086 .addReg(srcLoop).addMBB(loopMBB)
7087 .addReg(src).addMBB(entryBB);
7088 BuildMI(BB, dl, TII->get(ARM::PHI), destPhi)
7089 .addReg(destLoop).addMBB(loopMBB)
7090 .addReg(dest).addMBB(entryBB);
7092 // [scratch, srcLoop] = LDR_POST(srcPhi, UnitSize)
7093 // [destLoop] = STR_POST(scratch, destPhi, UnitSiz)
7094 unsigned scratch = MRI.createVirtualRegister(IsNeon ? VecTRC : TRC);
7095 emitPostLd(BB, BB->end(), TII, dl, UnitSize, scratch, srcPhi, srcLoop,
7096 IsThumb1, IsThumb2);
7097 emitPostSt(BB, BB->end(), TII, dl, UnitSize, scratch, destPhi, destLoop,
7098 IsThumb1, IsThumb2);
7100 // Decrement loop variable by UnitSize.
7102 MachineInstrBuilder MIB =
7103 BuildMI(*BB, BB->end(), dl, TII->get(ARM::tSUBi8), varLoop);
7104 MIB = AddDefaultT1CC(MIB);
7105 MIB.addReg(varPhi).addImm(UnitSize);
7106 AddDefaultPred(MIB);
7108 MachineInstrBuilder MIB =
7109 BuildMI(*BB, BB->end(), dl,
7110 TII->get(IsThumb2 ? ARM::t2SUBri : ARM::SUBri), varLoop);
7111 AddDefaultCC(AddDefaultPred(MIB.addReg(varPhi).addImm(UnitSize)));
7112 MIB->getOperand(5).setReg(ARM::CPSR);
7113 MIB->getOperand(5).setIsDef(true);
7115 BuildMI(*BB, BB->end(), dl,
7116 TII->get(IsThumb1 ? ARM::tBcc : IsThumb2 ? ARM::t2Bcc : ARM::Bcc))
7117 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
7119 // loopMBB can loop back to loopMBB or fall through to exitMBB.
7120 BB->addSuccessor(loopMBB);
7121 BB->addSuccessor(exitMBB);
7123 // Add epilogue to handle BytesLeft.
7125 MachineInstr *StartOfExit = exitMBB->begin();
7127 // [scratch, srcOut] = LDRB_POST(srcLoop, 1)
7128 // [destOut] = STRB_POST(scratch, destLoop, 1)
7129 unsigned srcIn = srcLoop;
7130 unsigned destIn = destLoop;
7131 for (unsigned i = 0; i < BytesLeft; i++) {
7132 unsigned srcOut = MRI.createVirtualRegister(TRC);
7133 unsigned destOut = MRI.createVirtualRegister(TRC);
7134 unsigned scratch = MRI.createVirtualRegister(TRC);
7135 emitPostLd(BB, StartOfExit, TII, dl, 1, scratch, srcIn, srcOut,
7136 IsThumb1, IsThumb2);
7137 emitPostSt(BB, StartOfExit, TII, dl, 1, scratch, destIn, destOut,
7138 IsThumb1, IsThumb2);
7143 MI->eraseFromParent(); // The instruction is gone now.
7148 ARMTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
7149 MachineBasicBlock *BB) const {
7150 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
7151 DebugLoc dl = MI->getDebugLoc();
7152 bool isThumb2 = Subtarget->isThumb2();
7153 switch (MI->getOpcode()) {
7156 llvm_unreachable("Unexpected instr type to insert");
7158 // The Thumb2 pre-indexed stores have the same MI operands, they just
7159 // define them differently in the .td files from the isel patterns, so
7160 // they need pseudos.
7161 case ARM::t2STR_preidx:
7162 MI->setDesc(TII->get(ARM::t2STR_PRE));
7164 case ARM::t2STRB_preidx:
7165 MI->setDesc(TII->get(ARM::t2STRB_PRE));
7167 case ARM::t2STRH_preidx:
7168 MI->setDesc(TII->get(ARM::t2STRH_PRE));
7171 case ARM::STRi_preidx:
7172 case ARM::STRBi_preidx: {
7173 unsigned NewOpc = MI->getOpcode() == ARM::STRi_preidx ?
7174 ARM::STR_PRE_IMM : ARM::STRB_PRE_IMM;
7175 // Decode the offset.
7176 unsigned Offset = MI->getOperand(4).getImm();
7177 bool isSub = ARM_AM::getAM2Op(Offset) == ARM_AM::sub;
7178 Offset = ARM_AM::getAM2Offset(Offset);
7182 MachineMemOperand *MMO = *MI->memoperands_begin();
7183 BuildMI(*BB, MI, dl, TII->get(NewOpc))
7184 .addOperand(MI->getOperand(0)) // Rn_wb
7185 .addOperand(MI->getOperand(1)) // Rt
7186 .addOperand(MI->getOperand(2)) // Rn
7187 .addImm(Offset) // offset (skip GPR==zero_reg)
7188 .addOperand(MI->getOperand(5)) // pred
7189 .addOperand(MI->getOperand(6))
7190 .addMemOperand(MMO);
7191 MI->eraseFromParent();
7194 case ARM::STRr_preidx:
7195 case ARM::STRBr_preidx:
7196 case ARM::STRH_preidx: {
7198 switch (MI->getOpcode()) {
7199 default: llvm_unreachable("unexpected opcode!");
7200 case ARM::STRr_preidx: NewOpc = ARM::STR_PRE_REG; break;
7201 case ARM::STRBr_preidx: NewOpc = ARM::STRB_PRE_REG; break;
7202 case ARM::STRH_preidx: NewOpc = ARM::STRH_PRE; break;
7204 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(NewOpc));
7205 for (unsigned i = 0; i < MI->getNumOperands(); ++i)
7206 MIB.addOperand(MI->getOperand(i));
7207 MI->eraseFromParent();
7211 case ARM::tMOVCCr_pseudo: {
7212 // To "insert" a SELECT_CC instruction, we actually have to insert the
7213 // diamond control-flow pattern. The incoming instruction knows the
7214 // destination vreg to set, the condition code register to branch on, the
7215 // true/false values to select between, and a branch opcode to use.
7216 const BasicBlock *LLVM_BB = BB->getBasicBlock();
7217 MachineFunction::iterator It = BB;
7223 // cmpTY ccX, r1, r2
7225 // fallthrough --> copy0MBB
7226 MachineBasicBlock *thisMBB = BB;
7227 MachineFunction *F = BB->getParent();
7228 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
7229 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
7230 F->insert(It, copy0MBB);
7231 F->insert(It, sinkMBB);
7233 // Transfer the remainder of BB and its successor edges to sinkMBB.
7234 sinkMBB->splice(sinkMBB->begin(), BB,
7235 std::next(MachineBasicBlock::iterator(MI)), BB->end());
7236 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
7238 BB->addSuccessor(copy0MBB);
7239 BB->addSuccessor(sinkMBB);
7241 BuildMI(BB, dl, TII->get(ARM::tBcc)).addMBB(sinkMBB)
7242 .addImm(MI->getOperand(3).getImm()).addReg(MI->getOperand(4).getReg());
7245 // %FalseValue = ...
7246 // # fallthrough to sinkMBB
7249 // Update machine-CFG edges
7250 BB->addSuccessor(sinkMBB);
7253 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
7256 BuildMI(*BB, BB->begin(), dl,
7257 TII->get(ARM::PHI), MI->getOperand(0).getReg())
7258 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
7259 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
7261 MI->eraseFromParent(); // The pseudo instruction is gone now.
7266 case ARM::BCCZi64: {
7267 // If there is an unconditional branch to the other successor, remove it.
7268 BB->erase(std::next(MachineBasicBlock::iterator(MI)), BB->end());
7270 // Compare both parts that make up the double comparison separately for
7272 bool RHSisZero = MI->getOpcode() == ARM::BCCZi64;
7274 unsigned LHS1 = MI->getOperand(1).getReg();
7275 unsigned LHS2 = MI->getOperand(2).getReg();
7277 AddDefaultPred(BuildMI(BB, dl,
7278 TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
7279 .addReg(LHS1).addImm(0));
7280 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
7281 .addReg(LHS2).addImm(0)
7282 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
7284 unsigned RHS1 = MI->getOperand(3).getReg();
7285 unsigned RHS2 = MI->getOperand(4).getReg();
7286 AddDefaultPred(BuildMI(BB, dl,
7287 TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
7288 .addReg(LHS1).addReg(RHS1));
7289 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
7290 .addReg(LHS2).addReg(RHS2)
7291 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
7294 MachineBasicBlock *destMBB = MI->getOperand(RHSisZero ? 3 : 5).getMBB();
7295 MachineBasicBlock *exitMBB = OtherSucc(BB, destMBB);
7296 if (MI->getOperand(0).getImm() == ARMCC::NE)
7297 std::swap(destMBB, exitMBB);
7299 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
7300 .addMBB(destMBB).addImm(ARMCC::EQ).addReg(ARM::CPSR);
7302 AddDefaultPred(BuildMI(BB, dl, TII->get(ARM::t2B)).addMBB(exitMBB));
7304 BuildMI(BB, dl, TII->get(ARM::B)) .addMBB(exitMBB);
7306 MI->eraseFromParent(); // The pseudo instruction is gone now.
7310 case ARM::Int_eh_sjlj_setjmp:
7311 case ARM::Int_eh_sjlj_setjmp_nofp:
7312 case ARM::tInt_eh_sjlj_setjmp:
7313 case ARM::t2Int_eh_sjlj_setjmp:
7314 case ARM::t2Int_eh_sjlj_setjmp_nofp:
7315 EmitSjLjDispatchBlock(MI, BB);
7320 // To insert an ABS instruction, we have to insert the
7321 // diamond control-flow pattern. The incoming instruction knows the
7322 // source vreg to test against 0, the destination vreg to set,
7323 // the condition code register to branch on, the
7324 // true/false values to select between, and a branch opcode to use.
7329 // BCC (branch to SinkBB if V0 >= 0)
7330 // RSBBB: V3 = RSBri V2, 0 (compute ABS if V2 < 0)
7331 // SinkBB: V1 = PHI(V2, V3)
7332 const BasicBlock *LLVM_BB = BB->getBasicBlock();
7333 MachineFunction::iterator BBI = BB;
7335 MachineFunction *Fn = BB->getParent();
7336 MachineBasicBlock *RSBBB = Fn->CreateMachineBasicBlock(LLVM_BB);
7337 MachineBasicBlock *SinkBB = Fn->CreateMachineBasicBlock(LLVM_BB);
7338 Fn->insert(BBI, RSBBB);
7339 Fn->insert(BBI, SinkBB);
7341 unsigned int ABSSrcReg = MI->getOperand(1).getReg();
7342 unsigned int ABSDstReg = MI->getOperand(0).getReg();
7343 bool isThumb2 = Subtarget->isThumb2();
7344 MachineRegisterInfo &MRI = Fn->getRegInfo();
7345 // In Thumb mode S must not be specified if source register is the SP or
7346 // PC and if destination register is the SP, so restrict register class
7347 unsigned NewRsbDstReg = MRI.createVirtualRegister(isThumb2 ?
7348 (const TargetRegisterClass*)&ARM::rGPRRegClass :
7349 (const TargetRegisterClass*)&ARM::GPRRegClass);
7351 // Transfer the remainder of BB and its successor edges to sinkMBB.
7352 SinkBB->splice(SinkBB->begin(), BB,
7353 std::next(MachineBasicBlock::iterator(MI)), BB->end());
7354 SinkBB->transferSuccessorsAndUpdatePHIs(BB);
7356 BB->addSuccessor(RSBBB);
7357 BB->addSuccessor(SinkBB);
7359 // fall through to SinkMBB
7360 RSBBB->addSuccessor(SinkBB);
7362 // insert a cmp at the end of BB
7363 AddDefaultPred(BuildMI(BB, dl,
7364 TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
7365 .addReg(ABSSrcReg).addImm(0));
7367 // insert a bcc with opposite CC to ARMCC::MI at the end of BB
7369 TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc)).addMBB(SinkBB)
7370 .addImm(ARMCC::getOppositeCondition(ARMCC::MI)).addReg(ARM::CPSR);
7372 // insert rsbri in RSBBB
7373 // Note: BCC and rsbri will be converted into predicated rsbmi
7374 // by if-conversion pass
7375 BuildMI(*RSBBB, RSBBB->begin(), dl,
7376 TII->get(isThumb2 ? ARM::t2RSBri : ARM::RSBri), NewRsbDstReg)
7377 .addReg(ABSSrcReg, RegState::Kill)
7378 .addImm(0).addImm((unsigned)ARMCC::AL).addReg(0).addReg(0);
7380 // insert PHI in SinkBB,
7381 // reuse ABSDstReg to not change uses of ABS instruction
7382 BuildMI(*SinkBB, SinkBB->begin(), dl,
7383 TII->get(ARM::PHI), ABSDstReg)
7384 .addReg(NewRsbDstReg).addMBB(RSBBB)
7385 .addReg(ABSSrcReg).addMBB(BB);
7387 // remove ABS instruction
7388 MI->eraseFromParent();
7390 // return last added BB
7393 case ARM::COPY_STRUCT_BYVAL_I32:
7395 return EmitStructByval(MI, BB);
7399 void ARMTargetLowering::AdjustInstrPostInstrSelection(MachineInstr *MI,
7400 SDNode *Node) const {
7401 if (!MI->hasPostISelHook()) {
7402 assert(!convertAddSubFlagsOpcode(MI->getOpcode()) &&
7403 "Pseudo flag-setting opcodes must be marked with 'hasPostISelHook'");
7407 const MCInstrDesc *MCID = &MI->getDesc();
7408 // Adjust potentially 's' setting instructions after isel, i.e. ADC, SBC, RSB,
7409 // RSC. Coming out of isel, they have an implicit CPSR def, but the optional
7410 // operand is still set to noreg. If needed, set the optional operand's
7411 // register to CPSR, and remove the redundant implicit def.
7413 // e.g. ADCS (..., CPSR<imp-def>) -> ADC (... opt:CPSR<def>).
7415 // Rename pseudo opcodes.
7416 unsigned NewOpc = convertAddSubFlagsOpcode(MI->getOpcode());
7418 const ARMBaseInstrInfo *TII =
7419 static_cast<const ARMBaseInstrInfo*>(getTargetMachine().getInstrInfo());
7420 MCID = &TII->get(NewOpc);
7422 assert(MCID->getNumOperands() == MI->getDesc().getNumOperands() + 1 &&
7423 "converted opcode should be the same except for cc_out");
7427 // Add the optional cc_out operand
7428 MI->addOperand(MachineOperand::CreateReg(0, /*isDef=*/true));
7430 unsigned ccOutIdx = MCID->getNumOperands() - 1;
7432 // Any ARM instruction that sets the 's' bit should specify an optional
7433 // "cc_out" operand in the last operand position.
7434 if (!MI->hasOptionalDef() || !MCID->OpInfo[ccOutIdx].isOptionalDef()) {
7435 assert(!NewOpc && "Optional cc_out operand required");
7438 // Look for an implicit def of CPSR added by MachineInstr ctor. Remove it
7439 // since we already have an optional CPSR def.
7440 bool definesCPSR = false;
7441 bool deadCPSR = false;
7442 for (unsigned i = MCID->getNumOperands(), e = MI->getNumOperands();
7444 const MachineOperand &MO = MI->getOperand(i);
7445 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR) {
7449 MI->RemoveOperand(i);
7454 assert(!NewOpc && "Optional cc_out operand required");
7457 assert(deadCPSR == !Node->hasAnyUseOfValue(1) && "inconsistent dead flag");
7459 assert(!MI->getOperand(ccOutIdx).getReg() &&
7460 "expect uninitialized optional cc_out operand");
7464 // If this instruction was defined with an optional CPSR def and its dag node
7465 // had a live implicit CPSR def, then activate the optional CPSR def.
7466 MachineOperand &MO = MI->getOperand(ccOutIdx);
7467 MO.setReg(ARM::CPSR);
7471 //===----------------------------------------------------------------------===//
7472 // ARM Optimization Hooks
7473 //===----------------------------------------------------------------------===//
7475 // Helper function that checks if N is a null or all ones constant.
7476 static inline bool isZeroOrAllOnes(SDValue N, bool AllOnes) {
7477 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N);
7480 return AllOnes ? C->isAllOnesValue() : C->isNullValue();
7483 // Return true if N is conditionally 0 or all ones.
7484 // Detects these expressions where cc is an i1 value:
7486 // (select cc 0, y) [AllOnes=0]
7487 // (select cc y, 0) [AllOnes=0]
7488 // (zext cc) [AllOnes=0]
7489 // (sext cc) [AllOnes=0/1]
7490 // (select cc -1, y) [AllOnes=1]
7491 // (select cc y, -1) [AllOnes=1]
7493 // Invert is set when N is the null/all ones constant when CC is false.
7494 // OtherOp is set to the alternative value of N.
7495 static bool isConditionalZeroOrAllOnes(SDNode *N, bool AllOnes,
7496 SDValue &CC, bool &Invert,
7498 SelectionDAG &DAG) {
7499 switch (N->getOpcode()) {
7500 default: return false;
7502 CC = N->getOperand(0);
7503 SDValue N1 = N->getOperand(1);
7504 SDValue N2 = N->getOperand(2);
7505 if (isZeroOrAllOnes(N1, AllOnes)) {
7510 if (isZeroOrAllOnes(N2, AllOnes)) {
7517 case ISD::ZERO_EXTEND:
7518 // (zext cc) can never be the all ones value.
7522 case ISD::SIGN_EXTEND: {
7523 EVT VT = N->getValueType(0);
7524 CC = N->getOperand(0);
7525 if (CC.getValueType() != MVT::i1)
7529 // When looking for an AllOnes constant, N is an sext, and the 'other'
7531 OtherOp = DAG.getConstant(0, VT);
7532 else if (N->getOpcode() == ISD::ZERO_EXTEND)
7533 // When looking for a 0 constant, N can be zext or sext.
7534 OtherOp = DAG.getConstant(1, VT);
7536 OtherOp = DAG.getConstant(APInt::getAllOnesValue(VT.getSizeInBits()), VT);
7542 // Combine a constant select operand into its use:
7544 // (add (select cc, 0, c), x) -> (select cc, x, (add, x, c))
7545 // (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c))
7546 // (and (select cc, -1, c), x) -> (select cc, x, (and, x, c)) [AllOnes=1]
7547 // (or (select cc, 0, c), x) -> (select cc, x, (or, x, c))
7548 // (xor (select cc, 0, c), x) -> (select cc, x, (xor, x, c))
7550 // The transform is rejected if the select doesn't have a constant operand that
7551 // is null, or all ones when AllOnes is set.
7553 // Also recognize sext/zext from i1:
7555 // (add (zext cc), x) -> (select cc (add x, 1), x)
7556 // (add (sext cc), x) -> (select cc (add x, -1), x)
7558 // These transformations eventually create predicated instructions.
7560 // @param N The node to transform.
7561 // @param Slct The N operand that is a select.
7562 // @param OtherOp The other N operand (x above).
7563 // @param DCI Context.
7564 // @param AllOnes Require the select constant to be all ones instead of null.
7565 // @returns The new node, or SDValue() on failure.
7567 SDValue combineSelectAndUse(SDNode *N, SDValue Slct, SDValue OtherOp,
7568 TargetLowering::DAGCombinerInfo &DCI,
7569 bool AllOnes = false) {
7570 SelectionDAG &DAG = DCI.DAG;
7571 EVT VT = N->getValueType(0);
7572 SDValue NonConstantVal;
7575 if (!isConditionalZeroOrAllOnes(Slct.getNode(), AllOnes, CCOp, SwapSelectOps,
7576 NonConstantVal, DAG))
7579 // Slct is now know to be the desired identity constant when CC is true.
7580 SDValue TrueVal = OtherOp;
7581 SDValue FalseVal = DAG.getNode(N->getOpcode(), SDLoc(N), VT,
7582 OtherOp, NonConstantVal);
7583 // Unless SwapSelectOps says CC should be false.
7585 std::swap(TrueVal, FalseVal);
7587 return DAG.getNode(ISD::SELECT, SDLoc(N), VT,
7588 CCOp, TrueVal, FalseVal);
7591 // Attempt combineSelectAndUse on each operand of a commutative operator N.
7593 SDValue combineSelectAndUseCommutative(SDNode *N, bool AllOnes,
7594 TargetLowering::DAGCombinerInfo &DCI) {
7595 SDValue N0 = N->getOperand(0);
7596 SDValue N1 = N->getOperand(1);
7597 if (N0.getNode()->hasOneUse()) {
7598 SDValue Result = combineSelectAndUse(N, N0, N1, DCI, AllOnes);
7599 if (Result.getNode())
7602 if (N1.getNode()->hasOneUse()) {
7603 SDValue Result = combineSelectAndUse(N, N1, N0, DCI, AllOnes);
7604 if (Result.getNode())
7610 // AddCombineToVPADDL- For pair-wise add on neon, use the vpaddl instruction
7611 // (only after legalization).
7612 static SDValue AddCombineToVPADDL(SDNode *N, SDValue N0, SDValue N1,
7613 TargetLowering::DAGCombinerInfo &DCI,
7614 const ARMSubtarget *Subtarget) {
7616 // Only perform optimization if after legalize, and if NEON is available. We
7617 // also expected both operands to be BUILD_VECTORs.
7618 if (DCI.isBeforeLegalize() || !Subtarget->hasNEON()
7619 || N0.getOpcode() != ISD::BUILD_VECTOR
7620 || N1.getOpcode() != ISD::BUILD_VECTOR)
7623 // Check output type since VPADDL operand elements can only be 8, 16, or 32.
7624 EVT VT = N->getValueType(0);
7625 if (!VT.isInteger() || VT.getVectorElementType() == MVT::i64)
7628 // Check that the vector operands are of the right form.
7629 // N0 and N1 are BUILD_VECTOR nodes with N number of EXTRACT_VECTOR
7630 // operands, where N is the size of the formed vector.
7631 // Each EXTRACT_VECTOR should have the same input vector and odd or even
7632 // index such that we have a pair wise add pattern.
7634 // Grab the vector that all EXTRACT_VECTOR nodes should be referencing.
7635 if (N0->getOperand(0)->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
7637 SDValue Vec = N0->getOperand(0)->getOperand(0);
7638 SDNode *V = Vec.getNode();
7639 unsigned nextIndex = 0;
7641 // For each operands to the ADD which are BUILD_VECTORs,
7642 // check to see if each of their operands are an EXTRACT_VECTOR with
7643 // the same vector and appropriate index.
7644 for (unsigned i = 0, e = N0->getNumOperands(); i != e; ++i) {
7645 if (N0->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT
7646 && N1->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
7648 SDValue ExtVec0 = N0->getOperand(i);
7649 SDValue ExtVec1 = N1->getOperand(i);
7651 // First operand is the vector, verify its the same.
7652 if (V != ExtVec0->getOperand(0).getNode() ||
7653 V != ExtVec1->getOperand(0).getNode())
7656 // Second is the constant, verify its correct.
7657 ConstantSDNode *C0 = dyn_cast<ConstantSDNode>(ExtVec0->getOperand(1));
7658 ConstantSDNode *C1 = dyn_cast<ConstantSDNode>(ExtVec1->getOperand(1));
7660 // For the constant, we want to see all the even or all the odd.
7661 if (!C0 || !C1 || C0->getZExtValue() != nextIndex
7662 || C1->getZExtValue() != nextIndex+1)
7671 // Create VPADDL node.
7672 SelectionDAG &DAG = DCI.DAG;
7673 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
7675 // Build operand list.
7676 SmallVector<SDValue, 8> Ops;
7677 Ops.push_back(DAG.getConstant(Intrinsic::arm_neon_vpaddls,
7678 TLI.getPointerTy()));
7680 // Input is the vector.
7683 // Get widened type and narrowed type.
7685 unsigned numElem = VT.getVectorNumElements();
7687 EVT inputLaneType = Vec.getValueType().getVectorElementType();
7688 switch (inputLaneType.getSimpleVT().SimpleTy) {
7689 case MVT::i8: widenType = MVT::getVectorVT(MVT::i16, numElem); break;
7690 case MVT::i16: widenType = MVT::getVectorVT(MVT::i32, numElem); break;
7691 case MVT::i32: widenType = MVT::getVectorVT(MVT::i64, numElem); break;
7693 llvm_unreachable("Invalid vector element type for padd optimization.");
7696 SDValue tmp = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, SDLoc(N), widenType, Ops);
7697 unsigned ExtOp = VT.bitsGT(tmp.getValueType()) ? ISD::ANY_EXTEND : ISD::TRUNCATE;
7698 return DAG.getNode(ExtOp, SDLoc(N), VT, tmp);
7701 static SDValue findMUL_LOHI(SDValue V) {
7702 if (V->getOpcode() == ISD::UMUL_LOHI ||
7703 V->getOpcode() == ISD::SMUL_LOHI)
7708 static SDValue AddCombineTo64bitMLAL(SDNode *AddcNode,
7709 TargetLowering::DAGCombinerInfo &DCI,
7710 const ARMSubtarget *Subtarget) {
7712 if (Subtarget->isThumb1Only()) return SDValue();
7714 // Only perform the checks after legalize when the pattern is available.
7715 if (DCI.isBeforeLegalize()) return SDValue();
7717 // Look for multiply add opportunities.
7718 // The pattern is a ISD::UMUL_LOHI followed by two add nodes, where
7719 // each add nodes consumes a value from ISD::UMUL_LOHI and there is
7720 // a glue link from the first add to the second add.
7721 // If we find this pattern, we can replace the U/SMUL_LOHI, ADDC, and ADDE by
7722 // a S/UMLAL instruction.
7725 // \ / \ [no multiline comment]
7731 assert(AddcNode->getOpcode() == ISD::ADDC && "Expect an ADDC");
7732 SDValue AddcOp0 = AddcNode->getOperand(0);
7733 SDValue AddcOp1 = AddcNode->getOperand(1);
7735 // Check if the two operands are from the same mul_lohi node.
7736 if (AddcOp0.getNode() == AddcOp1.getNode())
7739 assert(AddcNode->getNumValues() == 2 &&
7740 AddcNode->getValueType(0) == MVT::i32 &&
7741 "Expect ADDC with two result values. First: i32");
7743 // Check that we have a glued ADDC node.
7744 if (AddcNode->getValueType(1) != MVT::Glue)
7747 // Check that the ADDC adds the low result of the S/UMUL_LOHI.
7748 if (AddcOp0->getOpcode() != ISD::UMUL_LOHI &&
7749 AddcOp0->getOpcode() != ISD::SMUL_LOHI &&
7750 AddcOp1->getOpcode() != ISD::UMUL_LOHI &&
7751 AddcOp1->getOpcode() != ISD::SMUL_LOHI)
7754 // Look for the glued ADDE.
7755 SDNode* AddeNode = AddcNode->getGluedUser();
7759 // Make sure it is really an ADDE.
7760 if (AddeNode->getOpcode() != ISD::ADDE)
7763 assert(AddeNode->getNumOperands() == 3 &&
7764 AddeNode->getOperand(2).getValueType() == MVT::Glue &&
7765 "ADDE node has the wrong inputs");
7767 // Check for the triangle shape.
7768 SDValue AddeOp0 = AddeNode->getOperand(0);
7769 SDValue AddeOp1 = AddeNode->getOperand(1);
7771 // Make sure that the ADDE operands are not coming from the same node.
7772 if (AddeOp0.getNode() == AddeOp1.getNode())
7775 // Find the MUL_LOHI node walking up ADDE's operands.
7776 bool IsLeftOperandMUL = false;
7777 SDValue MULOp = findMUL_LOHI(AddeOp0);
7778 if (MULOp == SDValue())
7779 MULOp = findMUL_LOHI(AddeOp1);
7781 IsLeftOperandMUL = true;
7782 if (MULOp == SDValue())
7785 // Figure out the right opcode.
7786 unsigned Opc = MULOp->getOpcode();
7787 unsigned FinalOpc = (Opc == ISD::SMUL_LOHI) ? ARMISD::SMLAL : ARMISD::UMLAL;
7789 // Figure out the high and low input values to the MLAL node.
7790 SDValue* HiMul = &MULOp;
7791 SDValue* HiAdd = nullptr;
7792 SDValue* LoMul = nullptr;
7793 SDValue* LowAdd = nullptr;
7795 if (IsLeftOperandMUL)
7801 if (AddcOp0->getOpcode() == Opc) {
7805 if (AddcOp1->getOpcode() == Opc) {
7813 if (LoMul->getNode() != HiMul->getNode())
7816 // Create the merged node.
7817 SelectionDAG &DAG = DCI.DAG;
7819 // Build operand list.
7820 SmallVector<SDValue, 8> Ops;
7821 Ops.push_back(LoMul->getOperand(0));
7822 Ops.push_back(LoMul->getOperand(1));
7823 Ops.push_back(*LowAdd);
7824 Ops.push_back(*HiAdd);
7826 SDValue MLALNode = DAG.getNode(FinalOpc, SDLoc(AddcNode),
7827 DAG.getVTList(MVT::i32, MVT::i32), Ops);
7829 // Replace the ADDs' nodes uses by the MLA node's values.
7830 SDValue HiMLALResult(MLALNode.getNode(), 1);
7831 DAG.ReplaceAllUsesOfValueWith(SDValue(AddeNode, 0), HiMLALResult);
7833 SDValue LoMLALResult(MLALNode.getNode(), 0);
7834 DAG.ReplaceAllUsesOfValueWith(SDValue(AddcNode, 0), LoMLALResult);
7836 // Return original node to notify the driver to stop replacing.
7837 SDValue resNode(AddcNode, 0);
7841 /// PerformADDCCombine - Target-specific dag combine transform from
7842 /// ISD::ADDC, ISD::ADDE, and ISD::MUL_LOHI to MLAL.
7843 static SDValue PerformADDCCombine(SDNode *N,
7844 TargetLowering::DAGCombinerInfo &DCI,
7845 const ARMSubtarget *Subtarget) {
7847 return AddCombineTo64bitMLAL(N, DCI, Subtarget);
7851 /// PerformADDCombineWithOperands - Try DAG combinations for an ADD with
7852 /// operands N0 and N1. This is a helper for PerformADDCombine that is
7853 /// called with the default operands, and if that fails, with commuted
7855 static SDValue PerformADDCombineWithOperands(SDNode *N, SDValue N0, SDValue N1,
7856 TargetLowering::DAGCombinerInfo &DCI,
7857 const ARMSubtarget *Subtarget){
7859 // Attempt to create vpaddl for this add.
7860 SDValue Result = AddCombineToVPADDL(N, N0, N1, DCI, Subtarget);
7861 if (Result.getNode())
7864 // fold (add (select cc, 0, c), x) -> (select cc, x, (add, x, c))
7865 if (N0.getNode()->hasOneUse()) {
7866 SDValue Result = combineSelectAndUse(N, N0, N1, DCI);
7867 if (Result.getNode()) return Result;
7872 /// PerformADDCombine - Target-specific dag combine xforms for ISD::ADD.
7874 static SDValue PerformADDCombine(SDNode *N,
7875 TargetLowering::DAGCombinerInfo &DCI,
7876 const ARMSubtarget *Subtarget) {
7877 SDValue N0 = N->getOperand(0);
7878 SDValue N1 = N->getOperand(1);
7880 // First try with the default operand order.
7881 SDValue Result = PerformADDCombineWithOperands(N, N0, N1, DCI, Subtarget);
7882 if (Result.getNode())
7885 // If that didn't work, try again with the operands commuted.
7886 return PerformADDCombineWithOperands(N, N1, N0, DCI, Subtarget);
7889 /// PerformSUBCombine - Target-specific dag combine xforms for ISD::SUB.
7891 static SDValue PerformSUBCombine(SDNode *N,
7892 TargetLowering::DAGCombinerInfo &DCI) {
7893 SDValue N0 = N->getOperand(0);
7894 SDValue N1 = N->getOperand(1);
7896 // fold (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c))
7897 if (N1.getNode()->hasOneUse()) {
7898 SDValue Result = combineSelectAndUse(N, N1, N0, DCI);
7899 if (Result.getNode()) return Result;
7905 /// PerformVMULCombine
7906 /// Distribute (A + B) * C to (A * C) + (B * C) to take advantage of the
7907 /// special multiplier accumulator forwarding.
7913 // However, for (A + B) * (A + B),
7920 static SDValue PerformVMULCombine(SDNode *N,
7921 TargetLowering::DAGCombinerInfo &DCI,
7922 const ARMSubtarget *Subtarget) {
7923 if (!Subtarget->hasVMLxForwarding())
7926 SelectionDAG &DAG = DCI.DAG;
7927 SDValue N0 = N->getOperand(0);
7928 SDValue N1 = N->getOperand(1);
7929 unsigned Opcode = N0.getOpcode();
7930 if (Opcode != ISD::ADD && Opcode != ISD::SUB &&
7931 Opcode != ISD::FADD && Opcode != ISD::FSUB) {
7932 Opcode = N1.getOpcode();
7933 if (Opcode != ISD::ADD && Opcode != ISD::SUB &&
7934 Opcode != ISD::FADD && Opcode != ISD::FSUB)
7942 EVT VT = N->getValueType(0);
7944 SDValue N00 = N0->getOperand(0);
7945 SDValue N01 = N0->getOperand(1);
7946 return DAG.getNode(Opcode, DL, VT,
7947 DAG.getNode(ISD::MUL, DL, VT, N00, N1),
7948 DAG.getNode(ISD::MUL, DL, VT, N01, N1));
7951 static SDValue PerformMULCombine(SDNode *N,
7952 TargetLowering::DAGCombinerInfo &DCI,
7953 const ARMSubtarget *Subtarget) {
7954 SelectionDAG &DAG = DCI.DAG;
7956 if (Subtarget->isThumb1Only())
7959 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
7962 EVT VT = N->getValueType(0);
7963 if (VT.is64BitVector() || VT.is128BitVector())
7964 return PerformVMULCombine(N, DCI, Subtarget);
7968 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
7972 int64_t MulAmt = C->getSExtValue();
7973 unsigned ShiftAmt = countTrailingZeros<uint64_t>(MulAmt);
7975 ShiftAmt = ShiftAmt & (32 - 1);
7976 SDValue V = N->getOperand(0);
7980 MulAmt >>= ShiftAmt;
7983 if (isPowerOf2_32(MulAmt - 1)) {
7984 // (mul x, 2^N + 1) => (add (shl x, N), x)
7985 Res = DAG.getNode(ISD::ADD, DL, VT,
7987 DAG.getNode(ISD::SHL, DL, VT,
7989 DAG.getConstant(Log2_32(MulAmt - 1),
7991 } else if (isPowerOf2_32(MulAmt + 1)) {
7992 // (mul x, 2^N - 1) => (sub (shl x, N), x)
7993 Res = DAG.getNode(ISD::SUB, DL, VT,
7994 DAG.getNode(ISD::SHL, DL, VT,
7996 DAG.getConstant(Log2_32(MulAmt + 1),
8002 uint64_t MulAmtAbs = -MulAmt;
8003 if (isPowerOf2_32(MulAmtAbs + 1)) {
8004 // (mul x, -(2^N - 1)) => (sub x, (shl x, N))
8005 Res = DAG.getNode(ISD::SUB, DL, VT,
8007 DAG.getNode(ISD::SHL, DL, VT,
8009 DAG.getConstant(Log2_32(MulAmtAbs + 1),
8011 } else if (isPowerOf2_32(MulAmtAbs - 1)) {
8012 // (mul x, -(2^N + 1)) => - (add (shl x, N), x)
8013 Res = DAG.getNode(ISD::ADD, DL, VT,
8015 DAG.getNode(ISD::SHL, DL, VT,
8017 DAG.getConstant(Log2_32(MulAmtAbs-1),
8019 Res = DAG.getNode(ISD::SUB, DL, VT,
8020 DAG.getConstant(0, MVT::i32),Res);
8027 Res = DAG.getNode(ISD::SHL, DL, VT,
8028 Res, DAG.getConstant(ShiftAmt, MVT::i32));
8030 // Do not add new nodes to DAG combiner worklist.
8031 DCI.CombineTo(N, Res, false);
8035 static SDValue PerformANDCombine(SDNode *N,
8036 TargetLowering::DAGCombinerInfo &DCI,
8037 const ARMSubtarget *Subtarget) {
8039 // Attempt to use immediate-form VBIC
8040 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1));
8042 EVT VT = N->getValueType(0);
8043 SelectionDAG &DAG = DCI.DAG;
8045 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
8048 APInt SplatBits, SplatUndef;
8049 unsigned SplatBitSize;
8052 BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
8053 if (SplatBitSize <= 64) {
8055 SDValue Val = isNEONModifiedImm((~SplatBits).getZExtValue(),
8056 SplatUndef.getZExtValue(), SplatBitSize,
8057 DAG, VbicVT, VT.is128BitVector(),
8059 if (Val.getNode()) {
8061 DAG.getNode(ISD::BITCAST, dl, VbicVT, N->getOperand(0));
8062 SDValue Vbic = DAG.getNode(ARMISD::VBICIMM, dl, VbicVT, Input, Val);
8063 return DAG.getNode(ISD::BITCAST, dl, VT, Vbic);
8068 if (!Subtarget->isThumb1Only()) {
8069 // fold (and (select cc, -1, c), x) -> (select cc, x, (and, x, c))
8070 SDValue Result = combineSelectAndUseCommutative(N, true, DCI);
8071 if (Result.getNode())
8078 /// PerformORCombine - Target-specific dag combine xforms for ISD::OR
8079 static SDValue PerformORCombine(SDNode *N,
8080 TargetLowering::DAGCombinerInfo &DCI,
8081 const ARMSubtarget *Subtarget) {
8082 // Attempt to use immediate-form VORR
8083 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1));
8085 EVT VT = N->getValueType(0);
8086 SelectionDAG &DAG = DCI.DAG;
8088 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
8091 APInt SplatBits, SplatUndef;
8092 unsigned SplatBitSize;
8094 if (BVN && Subtarget->hasNEON() &&
8095 BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
8096 if (SplatBitSize <= 64) {
8098 SDValue Val = isNEONModifiedImm(SplatBits.getZExtValue(),
8099 SplatUndef.getZExtValue(), SplatBitSize,
8100 DAG, VorrVT, VT.is128BitVector(),
8102 if (Val.getNode()) {
8104 DAG.getNode(ISD::BITCAST, dl, VorrVT, N->getOperand(0));
8105 SDValue Vorr = DAG.getNode(ARMISD::VORRIMM, dl, VorrVT, Input, Val);
8106 return DAG.getNode(ISD::BITCAST, dl, VT, Vorr);
8111 if (!Subtarget->isThumb1Only()) {
8112 // fold (or (select cc, 0, c), x) -> (select cc, x, (or, x, c))
8113 SDValue Result = combineSelectAndUseCommutative(N, false, DCI);
8114 if (Result.getNode())
8118 // The code below optimizes (or (and X, Y), Z).
8119 // The AND operand needs to have a single user to make these optimizations
8121 SDValue N0 = N->getOperand(0);
8122 if (N0.getOpcode() != ISD::AND || !N0.hasOneUse())
8124 SDValue N1 = N->getOperand(1);
8126 // (or (and B, A), (and C, ~A)) => (VBSL A, B, C) when A is a constant.
8127 if (Subtarget->hasNEON() && N1.getOpcode() == ISD::AND && VT.isVector() &&
8128 DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
8130 unsigned SplatBitSize;
8133 APInt SplatBits0, SplatBits1;
8134 BuildVectorSDNode *BVN0 = dyn_cast<BuildVectorSDNode>(N0->getOperand(1));
8135 BuildVectorSDNode *BVN1 = dyn_cast<BuildVectorSDNode>(N1->getOperand(1));
8136 // Ensure that the second operand of both ands are constants
8137 if (BVN0 && BVN0->isConstantSplat(SplatBits0, SplatUndef, SplatBitSize,
8138 HasAnyUndefs) && !HasAnyUndefs) {
8139 if (BVN1 && BVN1->isConstantSplat(SplatBits1, SplatUndef, SplatBitSize,
8140 HasAnyUndefs) && !HasAnyUndefs) {
8141 // Ensure that the bit width of the constants are the same and that
8142 // the splat arguments are logical inverses as per the pattern we
8143 // are trying to simplify.
8144 if (SplatBits0.getBitWidth() == SplatBits1.getBitWidth() &&
8145 SplatBits0 == ~SplatBits1) {
8146 // Canonicalize the vector type to make instruction selection
8148 EVT CanonicalVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32;
8149 SDValue Result = DAG.getNode(ARMISD::VBSL, dl, CanonicalVT,
8153 return DAG.getNode(ISD::BITCAST, dl, VT, Result);
8159 // Try to use the ARM/Thumb2 BFI (bitfield insert) instruction when
8162 // BFI is only available on V6T2+
8163 if (Subtarget->isThumb1Only() || !Subtarget->hasV6T2Ops())
8167 // 1) or (and A, mask), val => ARMbfi A, val, mask
8168 // iff (val & mask) == val
8170 // 2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
8171 // 2a) iff isBitFieldInvertedMask(mask) && isBitFieldInvertedMask(~mask2)
8172 // && mask == ~mask2
8173 // 2b) iff isBitFieldInvertedMask(~mask) && isBitFieldInvertedMask(mask2)
8174 // && ~mask == mask2
8175 // (i.e., copy a bitfield value into another bitfield of the same width)
8180 SDValue N00 = N0.getOperand(0);
8182 // The value and the mask need to be constants so we can verify this is
8183 // actually a bitfield set. If the mask is 0xffff, we can do better
8184 // via a movt instruction, so don't use BFI in that case.
8185 SDValue MaskOp = N0.getOperand(1);
8186 ConstantSDNode *MaskC = dyn_cast<ConstantSDNode>(MaskOp);
8189 unsigned Mask = MaskC->getZExtValue();
8193 // Case (1): or (and A, mask), val => ARMbfi A, val, mask
8194 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
8196 unsigned Val = N1C->getZExtValue();
8197 if ((Val & ~Mask) != Val)
8200 if (ARM::isBitFieldInvertedMask(Mask)) {
8201 Val >>= countTrailingZeros(~Mask);
8203 Res = DAG.getNode(ARMISD::BFI, DL, VT, N00,
8204 DAG.getConstant(Val, MVT::i32),
8205 DAG.getConstant(Mask, MVT::i32));
8207 // Do not add new nodes to DAG combiner worklist.
8208 DCI.CombineTo(N, Res, false);
8211 } else if (N1.getOpcode() == ISD::AND) {
8212 // case (2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
8213 ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1));
8216 unsigned Mask2 = N11C->getZExtValue();
8218 // Mask and ~Mask2 (or reverse) must be equivalent for the BFI pattern
8220 if (ARM::isBitFieldInvertedMask(Mask) &&
8222 // The pack halfword instruction works better for masks that fit it,
8223 // so use that when it's available.
8224 if (Subtarget->hasT2ExtractPack() &&
8225 (Mask == 0xffff || Mask == 0xffff0000))
8228 unsigned amt = countTrailingZeros(Mask2);
8229 Res = DAG.getNode(ISD::SRL, DL, VT, N1.getOperand(0),
8230 DAG.getConstant(amt, MVT::i32));
8231 Res = DAG.getNode(ARMISD::BFI, DL, VT, N00, Res,
8232 DAG.getConstant(Mask, MVT::i32));
8233 // Do not add new nodes to DAG combiner worklist.
8234 DCI.CombineTo(N, Res, false);
8236 } else if (ARM::isBitFieldInvertedMask(~Mask) &&
8238 // The pack halfword instruction works better for masks that fit it,
8239 // so use that when it's available.
8240 if (Subtarget->hasT2ExtractPack() &&
8241 (Mask2 == 0xffff || Mask2 == 0xffff0000))
8244 unsigned lsb = countTrailingZeros(Mask);
8245 Res = DAG.getNode(ISD::SRL, DL, VT, N00,
8246 DAG.getConstant(lsb, MVT::i32));
8247 Res = DAG.getNode(ARMISD::BFI, DL, VT, N1.getOperand(0), Res,
8248 DAG.getConstant(Mask2, MVT::i32));
8249 // Do not add new nodes to DAG combiner worklist.
8250 DCI.CombineTo(N, Res, false);
8255 if (DAG.MaskedValueIsZero(N1, MaskC->getAPIntValue()) &&
8256 N00.getOpcode() == ISD::SHL && isa<ConstantSDNode>(N00.getOperand(1)) &&
8257 ARM::isBitFieldInvertedMask(~Mask)) {
8258 // Case (3): or (and (shl A, #shamt), mask), B => ARMbfi B, A, ~mask
8259 // where lsb(mask) == #shamt and masked bits of B are known zero.
8260 SDValue ShAmt = N00.getOperand(1);
8261 unsigned ShAmtC = cast<ConstantSDNode>(ShAmt)->getZExtValue();
8262 unsigned LSB = countTrailingZeros(Mask);
8266 Res = DAG.getNode(ARMISD::BFI, DL, VT, N1, N00.getOperand(0),
8267 DAG.getConstant(~Mask, MVT::i32));
8269 // Do not add new nodes to DAG combiner worklist.
8270 DCI.CombineTo(N, Res, false);
8276 static SDValue PerformXORCombine(SDNode *N,
8277 TargetLowering::DAGCombinerInfo &DCI,
8278 const ARMSubtarget *Subtarget) {
8279 EVT VT = N->getValueType(0);
8280 SelectionDAG &DAG = DCI.DAG;
8282 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
8285 if (!Subtarget->isThumb1Only()) {
8286 // fold (xor (select cc, 0, c), x) -> (select cc, x, (xor, x, c))
8287 SDValue Result = combineSelectAndUseCommutative(N, false, DCI);
8288 if (Result.getNode())
8295 /// PerformBFICombine - (bfi A, (and B, Mask1), Mask2) -> (bfi A, B, Mask2) iff
8296 /// the bits being cleared by the AND are not demanded by the BFI.
8297 static SDValue PerformBFICombine(SDNode *N,
8298 TargetLowering::DAGCombinerInfo &DCI) {
8299 SDValue N1 = N->getOperand(1);
8300 if (N1.getOpcode() == ISD::AND) {
8301 ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1));
8304 unsigned InvMask = cast<ConstantSDNode>(N->getOperand(2))->getZExtValue();
8305 unsigned LSB = countTrailingZeros(~InvMask);
8306 unsigned Width = (32 - countLeadingZeros(~InvMask)) - LSB;
8307 unsigned Mask = (1 << Width)-1;
8308 unsigned Mask2 = N11C->getZExtValue();
8309 if ((Mask & (~Mask2)) == 0)
8310 return DCI.DAG.getNode(ARMISD::BFI, SDLoc(N), N->getValueType(0),
8311 N->getOperand(0), N1.getOperand(0),
8317 /// PerformVMOVRRDCombine - Target-specific dag combine xforms for
8318 /// ARMISD::VMOVRRD.
8319 static SDValue PerformVMOVRRDCombine(SDNode *N,
8320 TargetLowering::DAGCombinerInfo &DCI) {
8321 // vmovrrd(vmovdrr x, y) -> x,y
8322 SDValue InDouble = N->getOperand(0);
8323 if (InDouble.getOpcode() == ARMISD::VMOVDRR)
8324 return DCI.CombineTo(N, InDouble.getOperand(0), InDouble.getOperand(1));
8326 // vmovrrd(load f64) -> (load i32), (load i32)
8327 SDNode *InNode = InDouble.getNode();
8328 if (ISD::isNormalLoad(InNode) && InNode->hasOneUse() &&
8329 InNode->getValueType(0) == MVT::f64 &&
8330 InNode->getOperand(1).getOpcode() == ISD::FrameIndex &&
8331 !cast<LoadSDNode>(InNode)->isVolatile()) {
8332 // TODO: Should this be done for non-FrameIndex operands?
8333 LoadSDNode *LD = cast<LoadSDNode>(InNode);
8335 SelectionDAG &DAG = DCI.DAG;
8337 SDValue BasePtr = LD->getBasePtr();
8338 SDValue NewLD1 = DAG.getLoad(MVT::i32, DL, LD->getChain(), BasePtr,
8339 LD->getPointerInfo(), LD->isVolatile(),
8340 LD->isNonTemporal(), LD->isInvariant(),
8341 LD->getAlignment());
8343 SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr,
8344 DAG.getConstant(4, MVT::i32));
8345 SDValue NewLD2 = DAG.getLoad(MVT::i32, DL, NewLD1.getValue(1), OffsetPtr,
8346 LD->getPointerInfo(), LD->isVolatile(),
8347 LD->isNonTemporal(), LD->isInvariant(),
8348 std::min(4U, LD->getAlignment() / 2));
8350 DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 1), NewLD2.getValue(1));
8351 SDValue Result = DCI.CombineTo(N, NewLD1, NewLD2);
8352 DCI.RemoveFromWorklist(LD);
8360 /// PerformVMOVDRRCombine - Target-specific dag combine xforms for
8361 /// ARMISD::VMOVDRR. This is also used for BUILD_VECTORs with 2 operands.
8362 static SDValue PerformVMOVDRRCombine(SDNode *N, SelectionDAG &DAG) {
8363 // N=vmovrrd(X); vmovdrr(N:0, N:1) -> bit_convert(X)
8364 SDValue Op0 = N->getOperand(0);
8365 SDValue Op1 = N->getOperand(1);
8366 if (Op0.getOpcode() == ISD::BITCAST)
8367 Op0 = Op0.getOperand(0);
8368 if (Op1.getOpcode() == ISD::BITCAST)
8369 Op1 = Op1.getOperand(0);
8370 if (Op0.getOpcode() == ARMISD::VMOVRRD &&
8371 Op0.getNode() == Op1.getNode() &&
8372 Op0.getResNo() == 0 && Op1.getResNo() == 1)
8373 return DAG.getNode(ISD::BITCAST, SDLoc(N),
8374 N->getValueType(0), Op0.getOperand(0));
8378 /// PerformSTORECombine - Target-specific dag combine xforms for
8380 static SDValue PerformSTORECombine(SDNode *N,
8381 TargetLowering::DAGCombinerInfo &DCI) {
8382 StoreSDNode *St = cast<StoreSDNode>(N);
8383 if (St->isVolatile())
8386 // Optimize trunc store (of multiple scalars) to shuffle and store. First,
8387 // pack all of the elements in one place. Next, store to memory in fewer
8389 SDValue StVal = St->getValue();
8390 EVT VT = StVal.getValueType();
8391 if (St->isTruncatingStore() && VT.isVector()) {
8392 SelectionDAG &DAG = DCI.DAG;
8393 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
8394 EVT StVT = St->getMemoryVT();
8395 unsigned NumElems = VT.getVectorNumElements();
8396 assert(StVT != VT && "Cannot truncate to the same type");
8397 unsigned FromEltSz = VT.getVectorElementType().getSizeInBits();
8398 unsigned ToEltSz = StVT.getVectorElementType().getSizeInBits();
8400 // From, To sizes and ElemCount must be pow of two
8401 if (!isPowerOf2_32(NumElems * FromEltSz * ToEltSz)) return SDValue();
8403 // We are going to use the original vector elt for storing.
8404 // Accumulated smaller vector elements must be a multiple of the store size.
8405 if (0 != (NumElems * FromEltSz) % ToEltSz) return SDValue();
8407 unsigned SizeRatio = FromEltSz / ToEltSz;
8408 assert(SizeRatio * NumElems * ToEltSz == VT.getSizeInBits());
8410 // Create a type on which we perform the shuffle.
8411 EVT WideVecVT = EVT::getVectorVT(*DAG.getContext(), StVT.getScalarType(),
8412 NumElems*SizeRatio);
8413 assert(WideVecVT.getSizeInBits() == VT.getSizeInBits());
8416 SDValue WideVec = DAG.getNode(ISD::BITCAST, DL, WideVecVT, StVal);
8417 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
8418 for (unsigned i = 0; i < NumElems; ++i) ShuffleVec[i] = i * SizeRatio;
8420 // Can't shuffle using an illegal type.
8421 if (!TLI.isTypeLegal(WideVecVT)) return SDValue();
8423 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, DL, WideVec,
8424 DAG.getUNDEF(WideVec.getValueType()),
8426 // At this point all of the data is stored at the bottom of the
8427 // register. We now need to save it to mem.
8429 // Find the largest store unit
8430 MVT StoreType = MVT::i8;
8431 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
8432 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
8433 MVT Tp = (MVT::SimpleValueType)tp;
8434 if (TLI.isTypeLegal(Tp) && Tp.getSizeInBits() <= NumElems * ToEltSz)
8437 // Didn't find a legal store type.
8438 if (!TLI.isTypeLegal(StoreType))
8441 // Bitcast the original vector into a vector of store-size units
8442 EVT StoreVecVT = EVT::getVectorVT(*DAG.getContext(),
8443 StoreType, VT.getSizeInBits()/EVT(StoreType).getSizeInBits());
8444 assert(StoreVecVT.getSizeInBits() == VT.getSizeInBits());
8445 SDValue ShuffWide = DAG.getNode(ISD::BITCAST, DL, StoreVecVT, Shuff);
8446 SmallVector<SDValue, 8> Chains;
8447 SDValue Increment = DAG.getConstant(StoreType.getSizeInBits()/8,
8448 TLI.getPointerTy());
8449 SDValue BasePtr = St->getBasePtr();
8451 // Perform one or more big stores into memory.
8452 unsigned E = (ToEltSz*NumElems)/StoreType.getSizeInBits();
8453 for (unsigned I = 0; I < E; I++) {
8454 SDValue SubVec = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL,
8455 StoreType, ShuffWide,
8456 DAG.getIntPtrConstant(I));
8457 SDValue Ch = DAG.getStore(St->getChain(), DL, SubVec, BasePtr,
8458 St->getPointerInfo(), St->isVolatile(),
8459 St->isNonTemporal(), St->getAlignment());
8460 BasePtr = DAG.getNode(ISD::ADD, DL, BasePtr.getValueType(), BasePtr,
8462 Chains.push_back(Ch);
8464 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Chains);
8467 if (!ISD::isNormalStore(St))
8470 // Split a store of a VMOVDRR into two integer stores to avoid mixing NEON and
8471 // ARM stores of arguments in the same cache line.
8472 if (StVal.getNode()->getOpcode() == ARMISD::VMOVDRR &&
8473 StVal.getNode()->hasOneUse()) {
8474 SelectionDAG &DAG = DCI.DAG;
8475 bool isBigEndian = DAG.getTargetLoweringInfo().isBigEndian();
8477 SDValue BasePtr = St->getBasePtr();
8478 SDValue NewST1 = DAG.getStore(St->getChain(), DL,
8479 StVal.getNode()->getOperand(isBigEndian ? 1 : 0 ),
8480 BasePtr, St->getPointerInfo(), St->isVolatile(),
8481 St->isNonTemporal(), St->getAlignment());
8483 SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr,
8484 DAG.getConstant(4, MVT::i32));
8485 return DAG.getStore(NewST1.getValue(0), DL,
8486 StVal.getNode()->getOperand(isBigEndian ? 0 : 1),
8487 OffsetPtr, St->getPointerInfo(), St->isVolatile(),
8488 St->isNonTemporal(),
8489 std::min(4U, St->getAlignment() / 2));
8492 if (StVal.getValueType() != MVT::i64 ||
8493 StVal.getNode()->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
8496 // Bitcast an i64 store extracted from a vector to f64.
8497 // Otherwise, the i64 value will be legalized to a pair of i32 values.
8498 SelectionDAG &DAG = DCI.DAG;
8500 SDValue IntVec = StVal.getOperand(0);
8501 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64,
8502 IntVec.getValueType().getVectorNumElements());
8503 SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, IntVec);
8504 SDValue ExtElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
8505 Vec, StVal.getOperand(1));
8507 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ExtElt);
8508 // Make the DAGCombiner fold the bitcasts.
8509 DCI.AddToWorklist(Vec.getNode());
8510 DCI.AddToWorklist(ExtElt.getNode());
8511 DCI.AddToWorklist(V.getNode());
8512 return DAG.getStore(St->getChain(), dl, V, St->getBasePtr(),
8513 St->getPointerInfo(), St->isVolatile(),
8514 St->isNonTemporal(), St->getAlignment(),
8518 /// hasNormalLoadOperand - Check if any of the operands of a BUILD_VECTOR node
8519 /// are normal, non-volatile loads. If so, it is profitable to bitcast an
8520 /// i64 vector to have f64 elements, since the value can then be loaded
8521 /// directly into a VFP register.
8522 static bool hasNormalLoadOperand(SDNode *N) {
8523 unsigned NumElts = N->getValueType(0).getVectorNumElements();
8524 for (unsigned i = 0; i < NumElts; ++i) {
8525 SDNode *Elt = N->getOperand(i).getNode();
8526 if (ISD::isNormalLoad(Elt) && !cast<LoadSDNode>(Elt)->isVolatile())
8532 /// PerformBUILD_VECTORCombine - Target-specific dag combine xforms for
8533 /// ISD::BUILD_VECTOR.
8534 static SDValue PerformBUILD_VECTORCombine(SDNode *N,
8535 TargetLowering::DAGCombinerInfo &DCI){
8536 // build_vector(N=ARMISD::VMOVRRD(X), N:1) -> bit_convert(X):
8537 // VMOVRRD is introduced when legalizing i64 types. It forces the i64 value
8538 // into a pair of GPRs, which is fine when the value is used as a scalar,
8539 // but if the i64 value is converted to a vector, we need to undo the VMOVRRD.
8540 SelectionDAG &DAG = DCI.DAG;
8541 if (N->getNumOperands() == 2) {
8542 SDValue RV = PerformVMOVDRRCombine(N, DAG);
8547 // Load i64 elements as f64 values so that type legalization does not split
8548 // them up into i32 values.
8549 EVT VT = N->getValueType(0);
8550 if (VT.getVectorElementType() != MVT::i64 || !hasNormalLoadOperand(N))
8553 SmallVector<SDValue, 8> Ops;
8554 unsigned NumElts = VT.getVectorNumElements();
8555 for (unsigned i = 0; i < NumElts; ++i) {
8556 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(i));
8558 // Make the DAGCombiner fold the bitcast.
8559 DCI.AddToWorklist(V.getNode());
8561 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64, NumElts);
8562 SDValue BV = DAG.getNode(ISD::BUILD_VECTOR, dl, FloatVT, Ops);
8563 return DAG.getNode(ISD::BITCAST, dl, VT, BV);
8566 /// \brief Target-specific dag combine xforms for ARMISD::BUILD_VECTOR.
8568 PerformARMBUILD_VECTORCombine(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) {
8569 // ARMISD::BUILD_VECTOR is introduced when legalizing ISD::BUILD_VECTOR.
8570 // At that time, we may have inserted bitcasts from integer to float.
8571 // If these bitcasts have survived DAGCombine, change the lowering of this
8572 // BUILD_VECTOR in something more vector friendly, i.e., that does not
8573 // force to use floating point types.
8575 // Make sure we can change the type of the vector.
8576 // This is possible iff:
8577 // 1. The vector is only used in a bitcast to a integer type. I.e.,
8578 // 1.1. Vector is used only once.
8579 // 1.2. Use is a bit convert to an integer type.
8580 // 2. The size of its operands are 32-bits (64-bits are not legal).
8581 EVT VT = N->getValueType(0);
8582 EVT EltVT = VT.getVectorElementType();
8584 // Check 1.1. and 2.
8585 if (EltVT.getSizeInBits() != 32 || !N->hasOneUse())
8588 // By construction, the input type must be float.
8589 assert(EltVT == MVT::f32 && "Unexpected type!");
8592 SDNode *Use = *N->use_begin();
8593 if (Use->getOpcode() != ISD::BITCAST ||
8594 Use->getValueType(0).isFloatingPoint())
8597 // Check profitability.
8598 // Model is, if more than half of the relevant operands are bitcast from
8599 // i32, turn the build_vector into a sequence of insert_vector_elt.
8600 // Relevant operands are everything that is not statically
8601 // (i.e., at compile time) bitcasted.
8602 unsigned NumOfBitCastedElts = 0;
8603 unsigned NumElts = VT.getVectorNumElements();
8604 unsigned NumOfRelevantElts = NumElts;
8605 for (unsigned Idx = 0; Idx < NumElts; ++Idx) {
8606 SDValue Elt = N->getOperand(Idx);
8607 if (Elt->getOpcode() == ISD::BITCAST) {
8608 // Assume only bit cast to i32 will go away.
8609 if (Elt->getOperand(0).getValueType() == MVT::i32)
8610 ++NumOfBitCastedElts;
8611 } else if (Elt.getOpcode() == ISD::UNDEF || isa<ConstantSDNode>(Elt))
8612 // Constants are statically casted, thus do not count them as
8613 // relevant operands.
8614 --NumOfRelevantElts;
8617 // Check if more than half of the elements require a non-free bitcast.
8618 if (NumOfBitCastedElts <= NumOfRelevantElts / 2)
8621 SelectionDAG &DAG = DCI.DAG;
8622 // Create the new vector type.
8623 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, NumElts);
8624 // Check if the type is legal.
8625 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
8626 if (!TLI.isTypeLegal(VecVT))
8630 // ARMISD::BUILD_VECTOR E1, E2, ..., EN.
8631 // => BITCAST INSERT_VECTOR_ELT
8632 // (INSERT_VECTOR_ELT (...), (BITCAST EN-1), N-1),
8634 SDValue Vec = DAG.getUNDEF(VecVT);
8636 for (unsigned Idx = 0 ; Idx < NumElts; ++Idx) {
8637 SDValue V = N->getOperand(Idx);
8638 if (V.getOpcode() == ISD::UNDEF)
8640 if (V.getOpcode() == ISD::BITCAST &&
8641 V->getOperand(0).getValueType() == MVT::i32)
8642 // Fold obvious case.
8643 V = V.getOperand(0);
8645 V = DAG.getNode(ISD::BITCAST, SDLoc(V), MVT::i32, V);
8646 // Make the DAGCombiner fold the bitcasts.
8647 DCI.AddToWorklist(V.getNode());
8649 SDValue LaneIdx = DAG.getConstant(Idx, MVT::i32);
8650 Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VecVT, Vec, V, LaneIdx);
8652 Vec = DAG.getNode(ISD::BITCAST, dl, VT, Vec);
8653 // Make the DAGCombiner fold the bitcasts.
8654 DCI.AddToWorklist(Vec.getNode());
8658 /// PerformInsertEltCombine - Target-specific dag combine xforms for
8659 /// ISD::INSERT_VECTOR_ELT.
8660 static SDValue PerformInsertEltCombine(SDNode *N,
8661 TargetLowering::DAGCombinerInfo &DCI) {
8662 // Bitcast an i64 load inserted into a vector to f64.
8663 // Otherwise, the i64 value will be legalized to a pair of i32 values.
8664 EVT VT = N->getValueType(0);
8665 SDNode *Elt = N->getOperand(1).getNode();
8666 if (VT.getVectorElementType() != MVT::i64 ||
8667 !ISD::isNormalLoad(Elt) || cast<LoadSDNode>(Elt)->isVolatile())
8670 SelectionDAG &DAG = DCI.DAG;
8672 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64,
8673 VT.getVectorNumElements());
8674 SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, N->getOperand(0));
8675 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(1));
8676 // Make the DAGCombiner fold the bitcasts.
8677 DCI.AddToWorklist(Vec.getNode());
8678 DCI.AddToWorklist(V.getNode());
8679 SDValue InsElt = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, FloatVT,
8680 Vec, V, N->getOperand(2));
8681 return DAG.getNode(ISD::BITCAST, dl, VT, InsElt);
8684 /// PerformVECTOR_SHUFFLECombine - Target-specific dag combine xforms for
8685 /// ISD::VECTOR_SHUFFLE.
8686 static SDValue PerformVECTOR_SHUFFLECombine(SDNode *N, SelectionDAG &DAG) {
8687 // The LLVM shufflevector instruction does not require the shuffle mask
8688 // length to match the operand vector length, but ISD::VECTOR_SHUFFLE does
8689 // have that requirement. When translating to ISD::VECTOR_SHUFFLE, if the
8690 // operands do not match the mask length, they are extended by concatenating
8691 // them with undef vectors. That is probably the right thing for other
8692 // targets, but for NEON it is better to concatenate two double-register
8693 // size vector operands into a single quad-register size vector. Do that
8694 // transformation here:
8695 // shuffle(concat(v1, undef), concat(v2, undef)) ->
8696 // shuffle(concat(v1, v2), undef)
8697 SDValue Op0 = N->getOperand(0);
8698 SDValue Op1 = N->getOperand(1);
8699 if (Op0.getOpcode() != ISD::CONCAT_VECTORS ||
8700 Op1.getOpcode() != ISD::CONCAT_VECTORS ||
8701 Op0.getNumOperands() != 2 ||
8702 Op1.getNumOperands() != 2)
8704 SDValue Concat0Op1 = Op0.getOperand(1);
8705 SDValue Concat1Op1 = Op1.getOperand(1);
8706 if (Concat0Op1.getOpcode() != ISD::UNDEF ||
8707 Concat1Op1.getOpcode() != ISD::UNDEF)
8709 // Skip the transformation if any of the types are illegal.
8710 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
8711 EVT VT = N->getValueType(0);
8712 if (!TLI.isTypeLegal(VT) ||
8713 !TLI.isTypeLegal(Concat0Op1.getValueType()) ||
8714 !TLI.isTypeLegal(Concat1Op1.getValueType()))
8717 SDValue NewConcat = DAG.getNode(ISD::CONCAT_VECTORS, SDLoc(N), VT,
8718 Op0.getOperand(0), Op1.getOperand(0));
8719 // Translate the shuffle mask.
8720 SmallVector<int, 16> NewMask;
8721 unsigned NumElts = VT.getVectorNumElements();
8722 unsigned HalfElts = NumElts/2;
8723 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(N);
8724 for (unsigned n = 0; n < NumElts; ++n) {
8725 int MaskElt = SVN->getMaskElt(n);
8727 if (MaskElt < (int)HalfElts)
8729 else if (MaskElt >= (int)NumElts && MaskElt < (int)(NumElts + HalfElts))
8730 NewElt = HalfElts + MaskElt - NumElts;
8731 NewMask.push_back(NewElt);
8733 return DAG.getVectorShuffle(VT, SDLoc(N), NewConcat,
8734 DAG.getUNDEF(VT), NewMask.data());
8737 /// CombineBaseUpdate - Target-specific DAG combine function for VLDDUP and
8738 /// NEON load/store intrinsics to merge base address updates.
8739 static SDValue CombineBaseUpdate(SDNode *N,
8740 TargetLowering::DAGCombinerInfo &DCI) {
8741 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
8744 SelectionDAG &DAG = DCI.DAG;
8745 bool isIntrinsic = (N->getOpcode() == ISD::INTRINSIC_VOID ||
8746 N->getOpcode() == ISD::INTRINSIC_W_CHAIN);
8747 unsigned AddrOpIdx = (isIntrinsic ? 2 : 1);
8748 SDValue Addr = N->getOperand(AddrOpIdx);
8750 // Search for a use of the address operand that is an increment.
8751 for (SDNode::use_iterator UI = Addr.getNode()->use_begin(),
8752 UE = Addr.getNode()->use_end(); UI != UE; ++UI) {
8754 if (User->getOpcode() != ISD::ADD ||
8755 UI.getUse().getResNo() != Addr.getResNo())
8758 // Check that the add is independent of the load/store. Otherwise, folding
8759 // it would create a cycle.
8760 if (User->isPredecessorOf(N) || N->isPredecessorOf(User))
8763 // Find the new opcode for the updating load/store.
8765 bool isLaneOp = false;
8766 unsigned NewOpc = 0;
8767 unsigned NumVecs = 0;
8769 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue();
8771 default: llvm_unreachable("unexpected intrinsic for Neon base update");
8772 case Intrinsic::arm_neon_vld1: NewOpc = ARMISD::VLD1_UPD;
8774 case Intrinsic::arm_neon_vld2: NewOpc = ARMISD::VLD2_UPD;
8776 case Intrinsic::arm_neon_vld3: NewOpc = ARMISD::VLD3_UPD;
8778 case Intrinsic::arm_neon_vld4: NewOpc = ARMISD::VLD4_UPD;
8780 case Intrinsic::arm_neon_vld2lane: NewOpc = ARMISD::VLD2LN_UPD;
8781 NumVecs = 2; isLaneOp = true; break;
8782 case Intrinsic::arm_neon_vld3lane: NewOpc = ARMISD::VLD3LN_UPD;
8783 NumVecs = 3; isLaneOp = true; break;
8784 case Intrinsic::arm_neon_vld4lane: NewOpc = ARMISD::VLD4LN_UPD;
8785 NumVecs = 4; isLaneOp = true; break;
8786 case Intrinsic::arm_neon_vst1: NewOpc = ARMISD::VST1_UPD;
8787 NumVecs = 1; isLoad = false; break;
8788 case Intrinsic::arm_neon_vst2: NewOpc = ARMISD::VST2_UPD;
8789 NumVecs = 2; isLoad = false; break;
8790 case Intrinsic::arm_neon_vst3: NewOpc = ARMISD::VST3_UPD;
8791 NumVecs = 3; isLoad = false; break;
8792 case Intrinsic::arm_neon_vst4: NewOpc = ARMISD::VST4_UPD;
8793 NumVecs = 4; isLoad = false; break;
8794 case Intrinsic::arm_neon_vst2lane: NewOpc = ARMISD::VST2LN_UPD;
8795 NumVecs = 2; isLoad = false; isLaneOp = true; break;
8796 case Intrinsic::arm_neon_vst3lane: NewOpc = ARMISD::VST3LN_UPD;
8797 NumVecs = 3; isLoad = false; isLaneOp = true; break;
8798 case Intrinsic::arm_neon_vst4lane: NewOpc = ARMISD::VST4LN_UPD;
8799 NumVecs = 4; isLoad = false; isLaneOp = true; break;
8803 switch (N->getOpcode()) {
8804 default: llvm_unreachable("unexpected opcode for Neon base update");
8805 case ARMISD::VLD2DUP: NewOpc = ARMISD::VLD2DUP_UPD; NumVecs = 2; break;
8806 case ARMISD::VLD3DUP: NewOpc = ARMISD::VLD3DUP_UPD; NumVecs = 3; break;
8807 case ARMISD::VLD4DUP: NewOpc = ARMISD::VLD4DUP_UPD; NumVecs = 4; break;
8811 // Find the size of memory referenced by the load/store.
8814 VecTy = N->getValueType(0);
8816 VecTy = N->getOperand(AddrOpIdx+1).getValueType();
8817 unsigned NumBytes = NumVecs * VecTy.getSizeInBits() / 8;
8819 NumBytes /= VecTy.getVectorNumElements();
8821 // If the increment is a constant, it must match the memory ref size.
8822 SDValue Inc = User->getOperand(User->getOperand(0) == Addr ? 1 : 0);
8823 if (ConstantSDNode *CInc = dyn_cast<ConstantSDNode>(Inc.getNode())) {
8824 uint64_t IncVal = CInc->getZExtValue();
8825 if (IncVal != NumBytes)
8827 } else if (NumBytes >= 3 * 16) {
8828 // VLD3/4 and VST3/4 for 128-bit vectors are implemented with two
8829 // separate instructions that make it harder to use a non-constant update.
8833 // Create the new updating load/store node.
8835 unsigned NumResultVecs = (isLoad ? NumVecs : 0);
8837 for (n = 0; n < NumResultVecs; ++n)
8839 Tys[n++] = MVT::i32;
8840 Tys[n] = MVT::Other;
8841 SDVTList SDTys = DAG.getVTList(ArrayRef<EVT>(Tys, NumResultVecs+2));
8842 SmallVector<SDValue, 8> Ops;
8843 Ops.push_back(N->getOperand(0)); // incoming chain
8844 Ops.push_back(N->getOperand(AddrOpIdx));
8846 for (unsigned i = AddrOpIdx + 1; i < N->getNumOperands(); ++i) {
8847 Ops.push_back(N->getOperand(i));
8849 MemIntrinsicSDNode *MemInt = cast<MemIntrinsicSDNode>(N);
8850 SDValue UpdN = DAG.getMemIntrinsicNode(NewOpc, SDLoc(N), SDTys,
8851 Ops, MemInt->getMemoryVT(),
8852 MemInt->getMemOperand());
8855 std::vector<SDValue> NewResults;
8856 for (unsigned i = 0; i < NumResultVecs; ++i) {
8857 NewResults.push_back(SDValue(UpdN.getNode(), i));
8859 NewResults.push_back(SDValue(UpdN.getNode(), NumResultVecs+1)); // chain
8860 DCI.CombineTo(N, NewResults);
8861 DCI.CombineTo(User, SDValue(UpdN.getNode(), NumResultVecs));
8868 /// CombineVLDDUP - For a VDUPLANE node N, check if its source operand is a
8869 /// vldN-lane (N > 1) intrinsic, and if all the other uses of that intrinsic
8870 /// are also VDUPLANEs. If so, combine them to a vldN-dup operation and
8872 static bool CombineVLDDUP(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) {
8873 SelectionDAG &DAG = DCI.DAG;
8874 EVT VT = N->getValueType(0);
8875 // vldN-dup instructions only support 64-bit vectors for N > 1.
8876 if (!VT.is64BitVector())
8879 // Check if the VDUPLANE operand is a vldN-dup intrinsic.
8880 SDNode *VLD = N->getOperand(0).getNode();
8881 if (VLD->getOpcode() != ISD::INTRINSIC_W_CHAIN)
8883 unsigned NumVecs = 0;
8884 unsigned NewOpc = 0;
8885 unsigned IntNo = cast<ConstantSDNode>(VLD->getOperand(1))->getZExtValue();
8886 if (IntNo == Intrinsic::arm_neon_vld2lane) {
8888 NewOpc = ARMISD::VLD2DUP;
8889 } else if (IntNo == Intrinsic::arm_neon_vld3lane) {
8891 NewOpc = ARMISD::VLD3DUP;
8892 } else if (IntNo == Intrinsic::arm_neon_vld4lane) {
8894 NewOpc = ARMISD::VLD4DUP;
8899 // First check that all the vldN-lane uses are VDUPLANEs and that the lane
8900 // numbers match the load.
8901 unsigned VLDLaneNo =
8902 cast<ConstantSDNode>(VLD->getOperand(NumVecs+3))->getZExtValue();
8903 for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
8905 // Ignore uses of the chain result.
8906 if (UI.getUse().getResNo() == NumVecs)
8909 if (User->getOpcode() != ARMISD::VDUPLANE ||
8910 VLDLaneNo != cast<ConstantSDNode>(User->getOperand(1))->getZExtValue())
8914 // Create the vldN-dup node.
8917 for (n = 0; n < NumVecs; ++n)
8919 Tys[n] = MVT::Other;
8920 SDVTList SDTys = DAG.getVTList(ArrayRef<EVT>(Tys, NumVecs+1));
8921 SDValue Ops[] = { VLD->getOperand(0), VLD->getOperand(2) };
8922 MemIntrinsicSDNode *VLDMemInt = cast<MemIntrinsicSDNode>(VLD);
8923 SDValue VLDDup = DAG.getMemIntrinsicNode(NewOpc, SDLoc(VLD), SDTys,
8924 Ops, VLDMemInt->getMemoryVT(),
8925 VLDMemInt->getMemOperand());
8928 for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
8930 unsigned ResNo = UI.getUse().getResNo();
8931 // Ignore uses of the chain result.
8932 if (ResNo == NumVecs)
8935 DCI.CombineTo(User, SDValue(VLDDup.getNode(), ResNo));
8938 // Now the vldN-lane intrinsic is dead except for its chain result.
8939 // Update uses of the chain.
8940 std::vector<SDValue> VLDDupResults;
8941 for (unsigned n = 0; n < NumVecs; ++n)
8942 VLDDupResults.push_back(SDValue(VLDDup.getNode(), n));
8943 VLDDupResults.push_back(SDValue(VLDDup.getNode(), NumVecs));
8944 DCI.CombineTo(VLD, VLDDupResults);
8949 /// PerformVDUPLANECombine - Target-specific dag combine xforms for
8950 /// ARMISD::VDUPLANE.
8951 static SDValue PerformVDUPLANECombine(SDNode *N,
8952 TargetLowering::DAGCombinerInfo &DCI) {
8953 SDValue Op = N->getOperand(0);
8955 // If the source is a vldN-lane (N > 1) intrinsic, and all the other uses
8956 // of that intrinsic are also VDUPLANEs, combine them to a vldN-dup operation.
8957 if (CombineVLDDUP(N, DCI))
8958 return SDValue(N, 0);
8960 // If the source is already a VMOVIMM or VMVNIMM splat, the VDUPLANE is
8961 // redundant. Ignore bit_converts for now; element sizes are checked below.
8962 while (Op.getOpcode() == ISD::BITCAST)
8963 Op = Op.getOperand(0);
8964 if (Op.getOpcode() != ARMISD::VMOVIMM && Op.getOpcode() != ARMISD::VMVNIMM)
8967 // Make sure the VMOV element size is not bigger than the VDUPLANE elements.
8968 unsigned EltSize = Op.getValueType().getVectorElementType().getSizeInBits();
8969 // The canonical VMOV for a zero vector uses a 32-bit element size.
8970 unsigned Imm = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
8972 if (ARM_AM::decodeNEONModImm(Imm, EltBits) == 0)
8974 EVT VT = N->getValueType(0);
8975 if (EltSize > VT.getVectorElementType().getSizeInBits())
8978 return DCI.DAG.getNode(ISD::BITCAST, SDLoc(N), VT, Op);
8981 // isConstVecPow2 - Return true if each vector element is a power of 2, all
8982 // elements are the same constant, C, and Log2(C) ranges from 1 to 32.
8983 static bool isConstVecPow2(SDValue ConstVec, bool isSigned, uint64_t &C)
8987 for (unsigned I = 0, E = ConstVec.getValueType().getVectorNumElements();
8989 ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(ConstVec.getOperand(I));
8994 APFloat APF = C->getValueAPF();
8995 if (APF.convertToInteger(&cN, 64, isSigned, APFloat::rmTowardZero, &isExact)
8996 != APFloat::opOK || !isExact)
8999 c0 = (I == 0) ? cN : c0;
9000 if (!isPowerOf2_64(cN) || c0 != cN || Log2_64(c0) < 1 || Log2_64(c0) > 32)
9007 /// PerformVCVTCombine - VCVT (floating-point to fixed-point, Advanced SIMD)
9008 /// can replace combinations of VMUL and VCVT (floating-point to integer)
9009 /// when the VMUL has a constant operand that is a power of 2.
9011 /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>):
9012 /// vmul.f32 d16, d17, d16
9013 /// vcvt.s32.f32 d16, d16
9015 /// vcvt.s32.f32 d16, d16, #3
9016 static SDValue PerformVCVTCombine(SDNode *N,
9017 TargetLowering::DAGCombinerInfo &DCI,
9018 const ARMSubtarget *Subtarget) {
9019 SelectionDAG &DAG = DCI.DAG;
9020 SDValue Op = N->getOperand(0);
9022 if (!Subtarget->hasNEON() || !Op.getValueType().isVector() ||
9023 Op.getOpcode() != ISD::FMUL)
9027 SDValue N0 = Op->getOperand(0);
9028 SDValue ConstVec = Op->getOperand(1);
9029 bool isSigned = N->getOpcode() == ISD::FP_TO_SINT;
9031 if (ConstVec.getOpcode() != ISD::BUILD_VECTOR ||
9032 !isConstVecPow2(ConstVec, isSigned, C))
9035 MVT FloatTy = Op.getSimpleValueType().getVectorElementType();
9036 MVT IntTy = N->getSimpleValueType(0).getVectorElementType();
9037 if (FloatTy.getSizeInBits() != 32 || IntTy.getSizeInBits() > 32) {
9038 // These instructions only exist converting from f32 to i32. We can handle
9039 // smaller integers by generating an extra truncate, but larger ones would
9044 unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfp2fxs :
9045 Intrinsic::arm_neon_vcvtfp2fxu;
9046 unsigned NumLanes = Op.getValueType().getVectorNumElements();
9047 SDValue FixConv = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, SDLoc(N),
9048 NumLanes == 2 ? MVT::v2i32 : MVT::v4i32,
9049 DAG.getConstant(IntrinsicOpcode, MVT::i32), N0,
9050 DAG.getConstant(Log2_64(C), MVT::i32));
9052 if (IntTy.getSizeInBits() < FloatTy.getSizeInBits())
9053 FixConv = DAG.getNode(ISD::TRUNCATE, SDLoc(N), N->getValueType(0), FixConv);
9058 /// PerformVDIVCombine - VCVT (fixed-point to floating-point, Advanced SIMD)
9059 /// can replace combinations of VCVT (integer to floating-point) and VDIV
9060 /// when the VDIV has a constant operand that is a power of 2.
9062 /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>):
9063 /// vcvt.f32.s32 d16, d16
9064 /// vdiv.f32 d16, d17, d16
9066 /// vcvt.f32.s32 d16, d16, #3
9067 static SDValue PerformVDIVCombine(SDNode *N,
9068 TargetLowering::DAGCombinerInfo &DCI,
9069 const ARMSubtarget *Subtarget) {
9070 SelectionDAG &DAG = DCI.DAG;
9071 SDValue Op = N->getOperand(0);
9072 unsigned OpOpcode = Op.getNode()->getOpcode();
9074 if (!Subtarget->hasNEON() || !N->getValueType(0).isVector() ||
9075 (OpOpcode != ISD::SINT_TO_FP && OpOpcode != ISD::UINT_TO_FP))
9079 SDValue ConstVec = N->getOperand(1);
9080 bool isSigned = OpOpcode == ISD::SINT_TO_FP;
9082 if (ConstVec.getOpcode() != ISD::BUILD_VECTOR ||
9083 !isConstVecPow2(ConstVec, isSigned, C))
9086 MVT FloatTy = N->getSimpleValueType(0).getVectorElementType();
9087 MVT IntTy = Op.getOperand(0).getSimpleValueType().getVectorElementType();
9088 if (FloatTy.getSizeInBits() != 32 || IntTy.getSizeInBits() > 32) {
9089 // These instructions only exist converting from i32 to f32. We can handle
9090 // smaller integers by generating an extra extend, but larger ones would
9095 SDValue ConvInput = Op.getOperand(0);
9096 unsigned NumLanes = Op.getValueType().getVectorNumElements();
9097 if (IntTy.getSizeInBits() < FloatTy.getSizeInBits())
9098 ConvInput = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
9099 SDLoc(N), NumLanes == 2 ? MVT::v2i32 : MVT::v4i32,
9102 unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfxs2fp :
9103 Intrinsic::arm_neon_vcvtfxu2fp;
9104 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, SDLoc(N),
9106 DAG.getConstant(IntrinsicOpcode, MVT::i32),
9107 ConvInput, DAG.getConstant(Log2_64(C), MVT::i32));
9110 /// Getvshiftimm - Check if this is a valid build_vector for the immediate
9111 /// operand of a vector shift operation, where all the elements of the
9112 /// build_vector must have the same constant integer value.
9113 static bool getVShiftImm(SDValue Op, unsigned ElementBits, int64_t &Cnt) {
9114 // Ignore bit_converts.
9115 while (Op.getOpcode() == ISD::BITCAST)
9116 Op = Op.getOperand(0);
9117 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
9118 APInt SplatBits, SplatUndef;
9119 unsigned SplatBitSize;
9121 if (! BVN || ! BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize,
9122 HasAnyUndefs, ElementBits) ||
9123 SplatBitSize > ElementBits)
9125 Cnt = SplatBits.getSExtValue();
9129 /// isVShiftLImm - Check if this is a valid build_vector for the immediate
9130 /// operand of a vector shift left operation. That value must be in the range:
9131 /// 0 <= Value < ElementBits for a left shift; or
9132 /// 0 <= Value <= ElementBits for a long left shift.
9133 static bool isVShiftLImm(SDValue Op, EVT VT, bool isLong, int64_t &Cnt) {
9134 assert(VT.isVector() && "vector shift count is not a vector type");
9135 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
9136 if (! getVShiftImm(Op, ElementBits, Cnt))
9138 return (Cnt >= 0 && (isLong ? Cnt-1 : Cnt) < ElementBits);
9141 /// isVShiftRImm - Check if this is a valid build_vector for the immediate
9142 /// operand of a vector shift right operation. For a shift opcode, the value
9143 /// is positive, but for an intrinsic the value count must be negative. The
9144 /// absolute value must be in the range:
9145 /// 1 <= |Value| <= ElementBits for a right shift; or
9146 /// 1 <= |Value| <= ElementBits/2 for a narrow right shift.
9147 static bool isVShiftRImm(SDValue Op, EVT VT, bool isNarrow, bool isIntrinsic,
9149 assert(VT.isVector() && "vector shift count is not a vector type");
9150 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
9151 if (! getVShiftImm(Op, ElementBits, Cnt))
9155 return (Cnt >= 1 && Cnt <= (isNarrow ? ElementBits/2 : ElementBits));
9158 /// PerformIntrinsicCombine - ARM-specific DAG combining for intrinsics.
9159 static SDValue PerformIntrinsicCombine(SDNode *N, SelectionDAG &DAG) {
9160 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
9163 // Don't do anything for most intrinsics.
9166 // Vector shifts: check for immediate versions and lower them.
9167 // Note: This is done during DAG combining instead of DAG legalizing because
9168 // the build_vectors for 64-bit vector element shift counts are generally
9169 // not legal, and it is hard to see their values after they get legalized to
9170 // loads from a constant pool.
9171 case Intrinsic::arm_neon_vshifts:
9172 case Intrinsic::arm_neon_vshiftu:
9173 case Intrinsic::arm_neon_vrshifts:
9174 case Intrinsic::arm_neon_vrshiftu:
9175 case Intrinsic::arm_neon_vrshiftn:
9176 case Intrinsic::arm_neon_vqshifts:
9177 case Intrinsic::arm_neon_vqshiftu:
9178 case Intrinsic::arm_neon_vqshiftsu:
9179 case Intrinsic::arm_neon_vqshiftns:
9180 case Intrinsic::arm_neon_vqshiftnu:
9181 case Intrinsic::arm_neon_vqshiftnsu:
9182 case Intrinsic::arm_neon_vqrshiftns:
9183 case Intrinsic::arm_neon_vqrshiftnu:
9184 case Intrinsic::arm_neon_vqrshiftnsu: {
9185 EVT VT = N->getOperand(1).getValueType();
9187 unsigned VShiftOpc = 0;
9190 case Intrinsic::arm_neon_vshifts:
9191 case Intrinsic::arm_neon_vshiftu:
9192 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt)) {
9193 VShiftOpc = ARMISD::VSHL;
9196 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt)) {
9197 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshifts ?
9198 ARMISD::VSHRs : ARMISD::VSHRu);
9203 case Intrinsic::arm_neon_vrshifts:
9204 case Intrinsic::arm_neon_vrshiftu:
9205 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt))
9209 case Intrinsic::arm_neon_vqshifts:
9210 case Intrinsic::arm_neon_vqshiftu:
9211 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
9215 case Intrinsic::arm_neon_vqshiftsu:
9216 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
9218 llvm_unreachable("invalid shift count for vqshlu intrinsic");
9220 case Intrinsic::arm_neon_vrshiftn:
9221 case Intrinsic::arm_neon_vqshiftns:
9222 case Intrinsic::arm_neon_vqshiftnu:
9223 case Intrinsic::arm_neon_vqshiftnsu:
9224 case Intrinsic::arm_neon_vqrshiftns:
9225 case Intrinsic::arm_neon_vqrshiftnu:
9226 case Intrinsic::arm_neon_vqrshiftnsu:
9227 // Narrowing shifts require an immediate right shift.
9228 if (isVShiftRImm(N->getOperand(2), VT, true, true, Cnt))
9230 llvm_unreachable("invalid shift count for narrowing vector shift "
9234 llvm_unreachable("unhandled vector shift");
9238 case Intrinsic::arm_neon_vshifts:
9239 case Intrinsic::arm_neon_vshiftu:
9240 // Opcode already set above.
9242 case Intrinsic::arm_neon_vrshifts:
9243 VShiftOpc = ARMISD::VRSHRs; break;
9244 case Intrinsic::arm_neon_vrshiftu:
9245 VShiftOpc = ARMISD::VRSHRu; break;
9246 case Intrinsic::arm_neon_vrshiftn:
9247 VShiftOpc = ARMISD::VRSHRN; break;
9248 case Intrinsic::arm_neon_vqshifts:
9249 VShiftOpc = ARMISD::VQSHLs; break;
9250 case Intrinsic::arm_neon_vqshiftu:
9251 VShiftOpc = ARMISD::VQSHLu; break;
9252 case Intrinsic::arm_neon_vqshiftsu:
9253 VShiftOpc = ARMISD::VQSHLsu; break;
9254 case Intrinsic::arm_neon_vqshiftns:
9255 VShiftOpc = ARMISD::VQSHRNs; break;
9256 case Intrinsic::arm_neon_vqshiftnu:
9257 VShiftOpc = ARMISD::VQSHRNu; break;
9258 case Intrinsic::arm_neon_vqshiftnsu:
9259 VShiftOpc = ARMISD::VQSHRNsu; break;
9260 case Intrinsic::arm_neon_vqrshiftns:
9261 VShiftOpc = ARMISD::VQRSHRNs; break;
9262 case Intrinsic::arm_neon_vqrshiftnu:
9263 VShiftOpc = ARMISD::VQRSHRNu; break;
9264 case Intrinsic::arm_neon_vqrshiftnsu:
9265 VShiftOpc = ARMISD::VQRSHRNsu; break;
9268 return DAG.getNode(VShiftOpc, SDLoc(N), N->getValueType(0),
9269 N->getOperand(1), DAG.getConstant(Cnt, MVT::i32));
9272 case Intrinsic::arm_neon_vshiftins: {
9273 EVT VT = N->getOperand(1).getValueType();
9275 unsigned VShiftOpc = 0;
9277 if (isVShiftLImm(N->getOperand(3), VT, false, Cnt))
9278 VShiftOpc = ARMISD::VSLI;
9279 else if (isVShiftRImm(N->getOperand(3), VT, false, true, Cnt))
9280 VShiftOpc = ARMISD::VSRI;
9282 llvm_unreachable("invalid shift count for vsli/vsri intrinsic");
9285 return DAG.getNode(VShiftOpc, SDLoc(N), N->getValueType(0),
9286 N->getOperand(1), N->getOperand(2),
9287 DAG.getConstant(Cnt, MVT::i32));
9290 case Intrinsic::arm_neon_vqrshifts:
9291 case Intrinsic::arm_neon_vqrshiftu:
9292 // No immediate versions of these to check for.
9299 /// PerformShiftCombine - Checks for immediate versions of vector shifts and
9300 /// lowers them. As with the vector shift intrinsics, this is done during DAG
9301 /// combining instead of DAG legalizing because the build_vectors for 64-bit
9302 /// vector element shift counts are generally not legal, and it is hard to see
9303 /// their values after they get legalized to loads from a constant pool.
9304 static SDValue PerformShiftCombine(SDNode *N, SelectionDAG &DAG,
9305 const ARMSubtarget *ST) {
9306 EVT VT = N->getValueType(0);
9307 if (N->getOpcode() == ISD::SRL && VT == MVT::i32 && ST->hasV6Ops()) {
9308 // Canonicalize (srl (bswap x), 16) to (rotr (bswap x), 16) if the high
9309 // 16-bits of x is zero. This optimizes rev + lsr 16 to rev16.
9310 SDValue N1 = N->getOperand(1);
9311 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N1)) {
9312 SDValue N0 = N->getOperand(0);
9313 if (C->getZExtValue() == 16 && N0.getOpcode() == ISD::BSWAP &&
9314 DAG.MaskedValueIsZero(N0.getOperand(0),
9315 APInt::getHighBitsSet(32, 16)))
9316 return DAG.getNode(ISD::ROTR, SDLoc(N), VT, N0, N1);
9320 // Nothing to be done for scalar shifts.
9321 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
9322 if (!VT.isVector() || !TLI.isTypeLegal(VT))
9325 assert(ST->hasNEON() && "unexpected vector shift");
9328 switch (N->getOpcode()) {
9329 default: llvm_unreachable("unexpected shift opcode");
9332 if (isVShiftLImm(N->getOperand(1), VT, false, Cnt))
9333 return DAG.getNode(ARMISD::VSHL, SDLoc(N), VT, N->getOperand(0),
9334 DAG.getConstant(Cnt, MVT::i32));
9339 if (isVShiftRImm(N->getOperand(1), VT, false, false, Cnt)) {
9340 unsigned VShiftOpc = (N->getOpcode() == ISD::SRA ?
9341 ARMISD::VSHRs : ARMISD::VSHRu);
9342 return DAG.getNode(VShiftOpc, SDLoc(N), VT, N->getOperand(0),
9343 DAG.getConstant(Cnt, MVT::i32));
9349 /// PerformExtendCombine - Target-specific DAG combining for ISD::SIGN_EXTEND,
9350 /// ISD::ZERO_EXTEND, and ISD::ANY_EXTEND.
9351 static SDValue PerformExtendCombine(SDNode *N, SelectionDAG &DAG,
9352 const ARMSubtarget *ST) {
9353 SDValue N0 = N->getOperand(0);
9355 // Check for sign- and zero-extensions of vector extract operations of 8-
9356 // and 16-bit vector elements. NEON supports these directly. They are
9357 // handled during DAG combining because type legalization will promote them
9358 // to 32-bit types and it is messy to recognize the operations after that.
9359 if (ST->hasNEON() && N0.getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
9360 SDValue Vec = N0.getOperand(0);
9361 SDValue Lane = N0.getOperand(1);
9362 EVT VT = N->getValueType(0);
9363 EVT EltVT = N0.getValueType();
9364 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
9366 if (VT == MVT::i32 &&
9367 (EltVT == MVT::i8 || EltVT == MVT::i16) &&
9368 TLI.isTypeLegal(Vec.getValueType()) &&
9369 isa<ConstantSDNode>(Lane)) {
9372 switch (N->getOpcode()) {
9373 default: llvm_unreachable("unexpected opcode");
9374 case ISD::SIGN_EXTEND:
9375 Opc = ARMISD::VGETLANEs;
9377 case ISD::ZERO_EXTEND:
9378 case ISD::ANY_EXTEND:
9379 Opc = ARMISD::VGETLANEu;
9382 return DAG.getNode(Opc, SDLoc(N), VT, Vec, Lane);
9389 /// PerformSELECT_CCCombine - Target-specific DAG combining for ISD::SELECT_CC
9390 /// to match f32 max/min patterns to use NEON vmax/vmin instructions.
9391 static SDValue PerformSELECT_CCCombine(SDNode *N, SelectionDAG &DAG,
9392 const ARMSubtarget *ST) {
9393 // If the target supports NEON, try to use vmax/vmin instructions for f32
9394 // selects like "x < y ? x : y". Unless the NoNaNsFPMath option is set,
9395 // be careful about NaNs: NEON's vmax/vmin return NaN if either operand is
9396 // a NaN; only do the transformation when it matches that behavior.
9398 // For now only do this when using NEON for FP operations; if using VFP, it
9399 // is not obvious that the benefit outweighs the cost of switching to the
9401 if (!ST->hasNEON() || !ST->useNEONForSinglePrecisionFP() ||
9402 N->getValueType(0) != MVT::f32)
9405 SDValue CondLHS = N->getOperand(0);
9406 SDValue CondRHS = N->getOperand(1);
9407 SDValue LHS = N->getOperand(2);
9408 SDValue RHS = N->getOperand(3);
9409 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(4))->get();
9411 unsigned Opcode = 0;
9413 if (DAG.isEqualTo(LHS, CondLHS) && DAG.isEqualTo(RHS, CondRHS)) {
9414 IsReversed = false; // x CC y ? x : y
9415 } else if (DAG.isEqualTo(LHS, CondRHS) && DAG.isEqualTo(RHS, CondLHS)) {
9416 IsReversed = true ; // x CC y ? y : x
9430 // If LHS is NaN, an ordered comparison will be false and the result will
9431 // be the RHS, but vmin(NaN, RHS) = NaN. Avoid this by checking that LHS
9432 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
9433 IsUnordered = (CC == ISD::SETULT || CC == ISD::SETULE);
9434 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
9436 // For less-than-or-equal comparisons, "+0 <= -0" will be true but vmin
9437 // will return -0, so vmin can only be used for unsafe math or if one of
9438 // the operands is known to be nonzero.
9439 if ((CC == ISD::SETLE || CC == ISD::SETOLE || CC == ISD::SETULE) &&
9440 !DAG.getTarget().Options.UnsafeFPMath &&
9441 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
9443 Opcode = IsReversed ? ARMISD::FMAX : ARMISD::FMIN;
9452 // If LHS is NaN, an ordered comparison will be false and the result will
9453 // be the RHS, but vmax(NaN, RHS) = NaN. Avoid this by checking that LHS
9454 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
9455 IsUnordered = (CC == ISD::SETUGT || CC == ISD::SETUGE);
9456 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
9458 // For greater-than-or-equal comparisons, "-0 >= +0" will be true but vmax
9459 // will return +0, so vmax can only be used for unsafe math or if one of
9460 // the operands is known to be nonzero.
9461 if ((CC == ISD::SETGE || CC == ISD::SETOGE || CC == ISD::SETUGE) &&
9462 !DAG.getTarget().Options.UnsafeFPMath &&
9463 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
9465 Opcode = IsReversed ? ARMISD::FMIN : ARMISD::FMAX;
9471 return DAG.getNode(Opcode, SDLoc(N), N->getValueType(0), LHS, RHS);
9474 /// PerformCMOVCombine - Target-specific DAG combining for ARMISD::CMOV.
9476 ARMTargetLowering::PerformCMOVCombine(SDNode *N, SelectionDAG &DAG) const {
9477 SDValue Cmp = N->getOperand(4);
9478 if (Cmp.getOpcode() != ARMISD::CMPZ)
9479 // Only looking at EQ and NE cases.
9482 EVT VT = N->getValueType(0);
9484 SDValue LHS = Cmp.getOperand(0);
9485 SDValue RHS = Cmp.getOperand(1);
9486 SDValue FalseVal = N->getOperand(0);
9487 SDValue TrueVal = N->getOperand(1);
9488 SDValue ARMcc = N->getOperand(2);
9489 ARMCC::CondCodes CC =
9490 (ARMCC::CondCodes)cast<ConstantSDNode>(ARMcc)->getZExtValue();
9508 /// FIXME: Turn this into a target neutral optimization?
9510 if (CC == ARMCC::NE && FalseVal == RHS && FalseVal != LHS) {
9511 Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, TrueVal, ARMcc,
9512 N->getOperand(3), Cmp);
9513 } else if (CC == ARMCC::EQ && TrueVal == RHS) {
9515 SDValue NewCmp = getARMCmp(LHS, RHS, ISD::SETNE, ARMcc, DAG, dl);
9516 Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, FalseVal, ARMcc,
9517 N->getOperand(3), NewCmp);
9520 if (Res.getNode()) {
9521 APInt KnownZero, KnownOne;
9522 DAG.ComputeMaskedBits(SDValue(N,0), KnownZero, KnownOne);
9523 // Capture demanded bits information that would be otherwise lost.
9524 if (KnownZero == 0xfffffffe)
9525 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
9526 DAG.getValueType(MVT::i1));
9527 else if (KnownZero == 0xffffff00)
9528 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
9529 DAG.getValueType(MVT::i8));
9530 else if (KnownZero == 0xffff0000)
9531 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
9532 DAG.getValueType(MVT::i16));
9538 SDValue ARMTargetLowering::PerformDAGCombine(SDNode *N,
9539 DAGCombinerInfo &DCI) const {
9540 switch (N->getOpcode()) {
9542 case ISD::ADDC: return PerformADDCCombine(N, DCI, Subtarget);
9543 case ISD::ADD: return PerformADDCombine(N, DCI, Subtarget);
9544 case ISD::SUB: return PerformSUBCombine(N, DCI);
9545 case ISD::MUL: return PerformMULCombine(N, DCI, Subtarget);
9546 case ISD::OR: return PerformORCombine(N, DCI, Subtarget);
9547 case ISD::XOR: return PerformXORCombine(N, DCI, Subtarget);
9548 case ISD::AND: return PerformANDCombine(N, DCI, Subtarget);
9549 case ARMISD::BFI: return PerformBFICombine(N, DCI);
9550 case ARMISD::VMOVRRD: return PerformVMOVRRDCombine(N, DCI);
9551 case ARMISD::VMOVDRR: return PerformVMOVDRRCombine(N, DCI.DAG);
9552 case ISD::STORE: return PerformSTORECombine(N, DCI);
9553 case ISD::BUILD_VECTOR: return PerformBUILD_VECTORCombine(N, DCI);
9554 case ISD::INSERT_VECTOR_ELT: return PerformInsertEltCombine(N, DCI);
9555 case ISD::VECTOR_SHUFFLE: return PerformVECTOR_SHUFFLECombine(N, DCI.DAG);
9556 case ARMISD::VDUPLANE: return PerformVDUPLANECombine(N, DCI);
9557 case ISD::FP_TO_SINT:
9558 case ISD::FP_TO_UINT: return PerformVCVTCombine(N, DCI, Subtarget);
9559 case ISD::FDIV: return PerformVDIVCombine(N, DCI, Subtarget);
9560 case ISD::INTRINSIC_WO_CHAIN: return PerformIntrinsicCombine(N, DCI.DAG);
9563 case ISD::SRL: return PerformShiftCombine(N, DCI.DAG, Subtarget);
9564 case ISD::SIGN_EXTEND:
9565 case ISD::ZERO_EXTEND:
9566 case ISD::ANY_EXTEND: return PerformExtendCombine(N, DCI.DAG, Subtarget);
9567 case ISD::SELECT_CC: return PerformSELECT_CCCombine(N, DCI.DAG, Subtarget);
9568 case ARMISD::CMOV: return PerformCMOVCombine(N, DCI.DAG);
9569 case ARMISD::VLD2DUP:
9570 case ARMISD::VLD3DUP:
9571 case ARMISD::VLD4DUP:
9572 return CombineBaseUpdate(N, DCI);
9573 case ARMISD::BUILD_VECTOR:
9574 return PerformARMBUILD_VECTORCombine(N, DCI);
9575 case ISD::INTRINSIC_VOID:
9576 case ISD::INTRINSIC_W_CHAIN:
9577 switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
9578 case Intrinsic::arm_neon_vld1:
9579 case Intrinsic::arm_neon_vld2:
9580 case Intrinsic::arm_neon_vld3:
9581 case Intrinsic::arm_neon_vld4:
9582 case Intrinsic::arm_neon_vld2lane:
9583 case Intrinsic::arm_neon_vld3lane:
9584 case Intrinsic::arm_neon_vld4lane:
9585 case Intrinsic::arm_neon_vst1:
9586 case Intrinsic::arm_neon_vst2:
9587 case Intrinsic::arm_neon_vst3:
9588 case Intrinsic::arm_neon_vst4:
9589 case Intrinsic::arm_neon_vst2lane:
9590 case Intrinsic::arm_neon_vst3lane:
9591 case Intrinsic::arm_neon_vst4lane:
9592 return CombineBaseUpdate(N, DCI);
9600 bool ARMTargetLowering::isDesirableToTransformToIntegerOp(unsigned Opc,
9602 return (VT == MVT::f32) && (Opc == ISD::LOAD || Opc == ISD::STORE);
9605 bool ARMTargetLowering::allowsUnalignedMemoryAccesses(EVT VT, unsigned,
9607 // The AllowsUnaliged flag models the SCTLR.A setting in ARM cpus
9608 bool AllowsUnaligned = Subtarget->allowsUnalignedMem();
9610 switch (VT.getSimpleVT().SimpleTy) {
9616 // Unaligned access can use (for example) LRDB, LRDH, LDR
9617 if (AllowsUnaligned) {
9619 *Fast = Subtarget->hasV7Ops();
9626 // For any little-endian targets with neon, we can support unaligned ld/st
9627 // of D and Q (e.g. {D0,D1}) registers by using vld1.i8/vst1.i8.
9628 // A big-endian target may also explicitly support unaligned accesses
9629 if (Subtarget->hasNEON() && (AllowsUnaligned || isLittleEndian())) {
9639 static bool memOpAlign(unsigned DstAlign, unsigned SrcAlign,
9640 unsigned AlignCheck) {
9641 return ((SrcAlign == 0 || SrcAlign % AlignCheck == 0) &&
9642 (DstAlign == 0 || DstAlign % AlignCheck == 0));
9645 EVT ARMTargetLowering::getOptimalMemOpType(uint64_t Size,
9646 unsigned DstAlign, unsigned SrcAlign,
9647 bool IsMemset, bool ZeroMemset,
9649 MachineFunction &MF) const {
9650 const Function *F = MF.getFunction();
9652 // See if we can use NEON instructions for this...
9653 if ((!IsMemset || ZeroMemset) &&
9654 Subtarget->hasNEON() &&
9655 !F->getAttributes().hasAttribute(AttributeSet::FunctionIndex,
9656 Attribute::NoImplicitFloat)) {
9659 (memOpAlign(SrcAlign, DstAlign, 16) ||
9660 (allowsUnalignedMemoryAccesses(MVT::v2f64, 0, &Fast) && Fast))) {
9662 } else if (Size >= 8 &&
9663 (memOpAlign(SrcAlign, DstAlign, 8) ||
9664 (allowsUnalignedMemoryAccesses(MVT::f64, 0, &Fast) && Fast))) {
9669 // Lowering to i32/i16 if the size permits.
9675 // Let the target-independent logic figure it out.
9679 bool ARMTargetLowering::isZExtFree(SDValue Val, EVT VT2) const {
9680 if (Val.getOpcode() != ISD::LOAD)
9683 EVT VT1 = Val.getValueType();
9684 if (!VT1.isSimple() || !VT1.isInteger() ||
9685 !VT2.isSimple() || !VT2.isInteger())
9688 switch (VT1.getSimpleVT().SimpleTy) {
9693 // 8-bit and 16-bit loads implicitly zero-extend to 32-bits.
9700 bool ARMTargetLowering::allowTruncateForTailCall(Type *Ty1, Type *Ty2) const {
9701 if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
9704 if (!isTypeLegal(EVT::getEVT(Ty1)))
9707 assert(Ty1->getPrimitiveSizeInBits() <= 64 && "i128 is probably not a noop");
9709 // Assuming the caller doesn't have a zeroext or signext return parameter,
9710 // truncation all the way down to i1 is valid.
9715 static bool isLegalT1AddressImmediate(int64_t V, EVT VT) {
9720 switch (VT.getSimpleVT().SimpleTy) {
9721 default: return false;
9736 if ((V & (Scale - 1)) != 0)
9739 return V == (V & ((1LL << 5) - 1));
9742 static bool isLegalT2AddressImmediate(int64_t V, EVT VT,
9743 const ARMSubtarget *Subtarget) {
9750 switch (VT.getSimpleVT().SimpleTy) {
9751 default: return false;
9756 // + imm12 or - imm8
9758 return V == (V & ((1LL << 8) - 1));
9759 return V == (V & ((1LL << 12) - 1));
9762 // Same as ARM mode. FIXME: NEON?
9763 if (!Subtarget->hasVFP2())
9768 return V == (V & ((1LL << 8) - 1));
9772 /// isLegalAddressImmediate - Return true if the integer value can be used
9773 /// as the offset of the target addressing mode for load / store of the
9775 static bool isLegalAddressImmediate(int64_t V, EVT VT,
9776 const ARMSubtarget *Subtarget) {
9783 if (Subtarget->isThumb1Only())
9784 return isLegalT1AddressImmediate(V, VT);
9785 else if (Subtarget->isThumb2())
9786 return isLegalT2AddressImmediate(V, VT, Subtarget);
9791 switch (VT.getSimpleVT().SimpleTy) {
9792 default: return false;
9797 return V == (V & ((1LL << 12) - 1));
9800 return V == (V & ((1LL << 8) - 1));
9803 if (!Subtarget->hasVFP2()) // FIXME: NEON?
9808 return V == (V & ((1LL << 8) - 1));
9812 bool ARMTargetLowering::isLegalT2ScaledAddressingMode(const AddrMode &AM,
9814 int Scale = AM.Scale;
9818 switch (VT.getSimpleVT().SimpleTy) {
9819 default: return false;
9828 return Scale == 2 || Scale == 4 || Scale == 8;
9831 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
9835 // Note, we allow "void" uses (basically, uses that aren't loads or
9836 // stores), because arm allows folding a scale into many arithmetic
9837 // operations. This should be made more precise and revisited later.
9839 // Allow r << imm, but the imm has to be a multiple of two.
9840 if (Scale & 1) return false;
9841 return isPowerOf2_32(Scale);
9845 /// isLegalAddressingMode - Return true if the addressing mode represented
9846 /// by AM is legal for this target, for a load/store of the specified type.
9847 bool ARMTargetLowering::isLegalAddressingMode(const AddrMode &AM,
9849 EVT VT = getValueType(Ty, true);
9850 if (!isLegalAddressImmediate(AM.BaseOffs, VT, Subtarget))
9853 // Can never fold addr of global into load/store.
9858 case 0: // no scale reg, must be "r+i" or "r", or "i".
9861 if (Subtarget->isThumb1Only())
9865 // ARM doesn't support any R+R*scale+imm addr modes.
9872 if (Subtarget->isThumb2())
9873 return isLegalT2ScaledAddressingMode(AM, VT);
9875 int Scale = AM.Scale;
9876 switch (VT.getSimpleVT().SimpleTy) {
9877 default: return false;
9881 if (Scale < 0) Scale = -Scale;
9885 return isPowerOf2_32(Scale & ~1);
9889 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
9894 // Note, we allow "void" uses (basically, uses that aren't loads or
9895 // stores), because arm allows folding a scale into many arithmetic
9896 // operations. This should be made more precise and revisited later.
9898 // Allow r << imm, but the imm has to be a multiple of two.
9899 if (Scale & 1) return false;
9900 return isPowerOf2_32(Scale);
9906 /// isLegalICmpImmediate - Return true if the specified immediate is legal
9907 /// icmp immediate, that is the target has icmp instructions which can compare
9908 /// a register against the immediate without having to materialize the
9909 /// immediate into a register.
9910 bool ARMTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
9911 // Thumb2 and ARM modes can use cmn for negative immediates.
9912 if (!Subtarget->isThumb())
9913 return ARM_AM::getSOImmVal(llvm::abs64(Imm)) != -1;
9914 if (Subtarget->isThumb2())
9915 return ARM_AM::getT2SOImmVal(llvm::abs64(Imm)) != -1;
9916 // Thumb1 doesn't have cmn, and only 8-bit immediates.
9917 return Imm >= 0 && Imm <= 255;
9920 /// isLegalAddImmediate - Return true if the specified immediate is a legal add
9921 /// *or sub* immediate, that is the target has add or sub instructions which can
9922 /// add a register with the immediate without having to materialize the
9923 /// immediate into a register.
9924 bool ARMTargetLowering::isLegalAddImmediate(int64_t Imm) const {
9925 // Same encoding for add/sub, just flip the sign.
9926 int64_t AbsImm = llvm::abs64(Imm);
9927 if (!Subtarget->isThumb())
9928 return ARM_AM::getSOImmVal(AbsImm) != -1;
9929 if (Subtarget->isThumb2())
9930 return ARM_AM::getT2SOImmVal(AbsImm) != -1;
9931 // Thumb1 only has 8-bit unsigned immediate.
9932 return AbsImm >= 0 && AbsImm <= 255;
9935 static bool getARMIndexedAddressParts(SDNode *Ptr, EVT VT,
9936 bool isSEXTLoad, SDValue &Base,
9937 SDValue &Offset, bool &isInc,
9938 SelectionDAG &DAG) {
9939 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
9942 if (VT == MVT::i16 || ((VT == MVT::i8 || VT == MVT::i1) && isSEXTLoad)) {
9944 Base = Ptr->getOperand(0);
9945 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
9946 int RHSC = (int)RHS->getZExtValue();
9947 if (RHSC < 0 && RHSC > -256) {
9948 assert(Ptr->getOpcode() == ISD::ADD);
9950 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
9954 isInc = (Ptr->getOpcode() == ISD::ADD);
9955 Offset = Ptr->getOperand(1);
9957 } else if (VT == MVT::i32 || VT == MVT::i8 || VT == MVT::i1) {
9959 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
9960 int RHSC = (int)RHS->getZExtValue();
9961 if (RHSC < 0 && RHSC > -0x1000) {
9962 assert(Ptr->getOpcode() == ISD::ADD);
9964 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
9965 Base = Ptr->getOperand(0);
9970 if (Ptr->getOpcode() == ISD::ADD) {
9972 ARM_AM::ShiftOpc ShOpcVal=
9973 ARM_AM::getShiftOpcForNode(Ptr->getOperand(0).getOpcode());
9974 if (ShOpcVal != ARM_AM::no_shift) {
9975 Base = Ptr->getOperand(1);
9976 Offset = Ptr->getOperand(0);
9978 Base = Ptr->getOperand(0);
9979 Offset = Ptr->getOperand(1);
9984 isInc = (Ptr->getOpcode() == ISD::ADD);
9985 Base = Ptr->getOperand(0);
9986 Offset = Ptr->getOperand(1);
9990 // FIXME: Use VLDM / VSTM to emulate indexed FP load / store.
9994 static bool getT2IndexedAddressParts(SDNode *Ptr, EVT VT,
9995 bool isSEXTLoad, SDValue &Base,
9996 SDValue &Offset, bool &isInc,
9997 SelectionDAG &DAG) {
9998 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
10001 Base = Ptr->getOperand(0);
10002 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
10003 int RHSC = (int)RHS->getZExtValue();
10004 if (RHSC < 0 && RHSC > -0x100) { // 8 bits.
10005 assert(Ptr->getOpcode() == ISD::ADD);
10007 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
10009 } else if (RHSC > 0 && RHSC < 0x100) { // 8 bit, no zero.
10010 isInc = Ptr->getOpcode() == ISD::ADD;
10011 Offset = DAG.getConstant(RHSC, RHS->getValueType(0));
10019 /// getPreIndexedAddressParts - returns true by value, base pointer and
10020 /// offset pointer and addressing mode by reference if the node's address
10021 /// can be legally represented as pre-indexed load / store address.
10023 ARMTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base,
10025 ISD::MemIndexedMode &AM,
10026 SelectionDAG &DAG) const {
10027 if (Subtarget->isThumb1Only())
10032 bool isSEXTLoad = false;
10033 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
10034 Ptr = LD->getBasePtr();
10035 VT = LD->getMemoryVT();
10036 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
10037 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
10038 Ptr = ST->getBasePtr();
10039 VT = ST->getMemoryVT();
10044 bool isLegal = false;
10045 if (Subtarget->isThumb2())
10046 isLegal = getT2IndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
10047 Offset, isInc, DAG);
10049 isLegal = getARMIndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
10050 Offset, isInc, DAG);
10054 AM = isInc ? ISD::PRE_INC : ISD::PRE_DEC;
10058 /// getPostIndexedAddressParts - returns true by value, base pointer and
10059 /// offset pointer and addressing mode by reference if this node can be
10060 /// combined with a load / store to form a post-indexed load / store.
10061 bool ARMTargetLowering::getPostIndexedAddressParts(SDNode *N, SDNode *Op,
10064 ISD::MemIndexedMode &AM,
10065 SelectionDAG &DAG) const {
10066 if (Subtarget->isThumb1Only())
10071 bool isSEXTLoad = false;
10072 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
10073 VT = LD->getMemoryVT();
10074 Ptr = LD->getBasePtr();
10075 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
10076 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
10077 VT = ST->getMemoryVT();
10078 Ptr = ST->getBasePtr();
10083 bool isLegal = false;
10084 if (Subtarget->isThumb2())
10085 isLegal = getT2IndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
10088 isLegal = getARMIndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
10094 // Swap base ptr and offset to catch more post-index load / store when
10095 // it's legal. In Thumb2 mode, offset must be an immediate.
10096 if (Ptr == Offset && Op->getOpcode() == ISD::ADD &&
10097 !Subtarget->isThumb2())
10098 std::swap(Base, Offset);
10100 // Post-indexed load / store update the base pointer.
10105 AM = isInc ? ISD::POST_INC : ISD::POST_DEC;
10109 void ARMTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
10112 const SelectionDAG &DAG,
10113 unsigned Depth) const {
10114 unsigned BitWidth = KnownOne.getBitWidth();
10115 KnownZero = KnownOne = APInt(BitWidth, 0);
10116 switch (Op.getOpcode()) {
10122 // These nodes' second result is a boolean
10123 if (Op.getResNo() == 0)
10125 KnownZero |= APInt::getHighBitsSet(BitWidth, BitWidth - 1);
10127 case ARMISD::CMOV: {
10128 // Bits are known zero/one if known on the LHS and RHS.
10129 DAG.ComputeMaskedBits(Op.getOperand(0), KnownZero, KnownOne, Depth+1);
10130 if (KnownZero == 0 && KnownOne == 0) return;
10132 APInt KnownZeroRHS, KnownOneRHS;
10133 DAG.ComputeMaskedBits(Op.getOperand(1), KnownZeroRHS, KnownOneRHS, Depth+1);
10134 KnownZero &= KnownZeroRHS;
10135 KnownOne &= KnownOneRHS;
10138 case ISD::INTRINSIC_W_CHAIN: {
10139 ConstantSDNode *CN = cast<ConstantSDNode>(Op->getOperand(1));
10140 Intrinsic::ID IntID = static_cast<Intrinsic::ID>(CN->getZExtValue());
10143 case Intrinsic::arm_ldaex:
10144 case Intrinsic::arm_ldrex: {
10145 EVT VT = cast<MemIntrinsicSDNode>(Op)->getMemoryVT();
10146 unsigned MemBits = VT.getScalarType().getSizeInBits();
10147 KnownZero |= APInt::getHighBitsSet(BitWidth, BitWidth - MemBits);
10155 //===----------------------------------------------------------------------===//
10156 // ARM Inline Assembly Support
10157 //===----------------------------------------------------------------------===//
10159 bool ARMTargetLowering::ExpandInlineAsm(CallInst *CI) const {
10160 // Looking for "rev" which is V6+.
10161 if (!Subtarget->hasV6Ops())
10164 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
10165 std::string AsmStr = IA->getAsmString();
10166 SmallVector<StringRef, 4> AsmPieces;
10167 SplitString(AsmStr, AsmPieces, ";\n");
10169 switch (AsmPieces.size()) {
10170 default: return false;
10172 AsmStr = AsmPieces[0];
10174 SplitString(AsmStr, AsmPieces, " \t,");
10177 if (AsmPieces.size() == 3 &&
10178 AsmPieces[0] == "rev" && AsmPieces[1] == "$0" && AsmPieces[2] == "$1" &&
10179 IA->getConstraintString().compare(0, 4, "=l,l") == 0) {
10180 IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
10181 if (Ty && Ty->getBitWidth() == 32)
10182 return IntrinsicLowering::LowerToByteSwap(CI);
10190 /// getConstraintType - Given a constraint letter, return the type of
10191 /// constraint it is for this target.
10192 ARMTargetLowering::ConstraintType
10193 ARMTargetLowering::getConstraintType(const std::string &Constraint) const {
10194 if (Constraint.size() == 1) {
10195 switch (Constraint[0]) {
10197 case 'l': return C_RegisterClass;
10198 case 'w': return C_RegisterClass;
10199 case 'h': return C_RegisterClass;
10200 case 'x': return C_RegisterClass;
10201 case 't': return C_RegisterClass;
10202 case 'j': return C_Other; // Constant for movw.
10203 // An address with a single base register. Due to the way we
10204 // currently handle addresses it is the same as an 'r' memory constraint.
10205 case 'Q': return C_Memory;
10207 } else if (Constraint.size() == 2) {
10208 switch (Constraint[0]) {
10210 // All 'U+' constraints are addresses.
10211 case 'U': return C_Memory;
10214 return TargetLowering::getConstraintType(Constraint);
10217 /// Examine constraint type and operand type and determine a weight value.
10218 /// This object must already have been set up with the operand type
10219 /// and the current alternative constraint selected.
10220 TargetLowering::ConstraintWeight
10221 ARMTargetLowering::getSingleConstraintMatchWeight(
10222 AsmOperandInfo &info, const char *constraint) const {
10223 ConstraintWeight weight = CW_Invalid;
10224 Value *CallOperandVal = info.CallOperandVal;
10225 // If we don't have a value, we can't do a match,
10226 // but allow it at the lowest weight.
10227 if (!CallOperandVal)
10229 Type *type = CallOperandVal->getType();
10230 // Look at the constraint type.
10231 switch (*constraint) {
10233 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
10236 if (type->isIntegerTy()) {
10237 if (Subtarget->isThumb())
10238 weight = CW_SpecificReg;
10240 weight = CW_Register;
10244 if (type->isFloatingPointTy())
10245 weight = CW_Register;
10251 typedef std::pair<unsigned, const TargetRegisterClass*> RCPair;
10253 ARMTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
10255 if (Constraint.size() == 1) {
10256 // GCC ARM Constraint Letters
10257 switch (Constraint[0]) {
10258 case 'l': // Low regs or general regs.
10259 if (Subtarget->isThumb())
10260 return RCPair(0U, &ARM::tGPRRegClass);
10261 return RCPair(0U, &ARM::GPRRegClass);
10262 case 'h': // High regs or no regs.
10263 if (Subtarget->isThumb())
10264 return RCPair(0U, &ARM::hGPRRegClass);
10267 return RCPair(0U, &ARM::GPRRegClass);
10269 if (VT == MVT::Other)
10271 if (VT == MVT::f32)
10272 return RCPair(0U, &ARM::SPRRegClass);
10273 if (VT.getSizeInBits() == 64)
10274 return RCPair(0U, &ARM::DPRRegClass);
10275 if (VT.getSizeInBits() == 128)
10276 return RCPair(0U, &ARM::QPRRegClass);
10279 if (VT == MVT::Other)
10281 if (VT == MVT::f32)
10282 return RCPair(0U, &ARM::SPR_8RegClass);
10283 if (VT.getSizeInBits() == 64)
10284 return RCPair(0U, &ARM::DPR_8RegClass);
10285 if (VT.getSizeInBits() == 128)
10286 return RCPair(0U, &ARM::QPR_8RegClass);
10289 if (VT == MVT::f32)
10290 return RCPair(0U, &ARM::SPRRegClass);
10294 if (StringRef("{cc}").equals_lower(Constraint))
10295 return std::make_pair(unsigned(ARM::CPSR), &ARM::CCRRegClass);
10297 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
10300 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
10301 /// vector. If it is invalid, don't add anything to Ops.
10302 void ARMTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
10303 std::string &Constraint,
10304 std::vector<SDValue>&Ops,
10305 SelectionDAG &DAG) const {
10308 // Currently only support length 1 constraints.
10309 if (Constraint.length() != 1) return;
10311 char ConstraintLetter = Constraint[0];
10312 switch (ConstraintLetter) {
10315 case 'I': case 'J': case 'K': case 'L':
10316 case 'M': case 'N': case 'O':
10317 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
10321 int64_t CVal64 = C->getSExtValue();
10322 int CVal = (int) CVal64;
10323 // None of these constraints allow values larger than 32 bits. Check
10324 // that the value fits in an int.
10325 if (CVal != CVal64)
10328 switch (ConstraintLetter) {
10330 // Constant suitable for movw, must be between 0 and
10332 if (Subtarget->hasV6T2Ops())
10333 if (CVal >= 0 && CVal <= 65535)
10337 if (Subtarget->isThumb1Only()) {
10338 // This must be a constant between 0 and 255, for ADD
10340 if (CVal >= 0 && CVal <= 255)
10342 } else if (Subtarget->isThumb2()) {
10343 // A constant that can be used as an immediate value in a
10344 // data-processing instruction.
10345 if (ARM_AM::getT2SOImmVal(CVal) != -1)
10348 // A constant that can be used as an immediate value in a
10349 // data-processing instruction.
10350 if (ARM_AM::getSOImmVal(CVal) != -1)
10356 if (Subtarget->isThumb()) { // FIXME thumb2
10357 // This must be a constant between -255 and -1, for negated ADD
10358 // immediates. This can be used in GCC with an "n" modifier that
10359 // prints the negated value, for use with SUB instructions. It is
10360 // not useful otherwise but is implemented for compatibility.
10361 if (CVal >= -255 && CVal <= -1)
10364 // This must be a constant between -4095 and 4095. It is not clear
10365 // what this constraint is intended for. Implemented for
10366 // compatibility with GCC.
10367 if (CVal >= -4095 && CVal <= 4095)
10373 if (Subtarget->isThumb1Only()) {
10374 // A 32-bit value where only one byte has a nonzero value. Exclude
10375 // zero to match GCC. This constraint is used by GCC internally for
10376 // constants that can be loaded with a move/shift combination.
10377 // It is not useful otherwise but is implemented for compatibility.
10378 if (CVal != 0 && ARM_AM::isThumbImmShiftedVal(CVal))
10380 } else if (Subtarget->isThumb2()) {
10381 // A constant whose bitwise inverse can be used as an immediate
10382 // value in a data-processing instruction. This can be used in GCC
10383 // with a "B" modifier that prints the inverted value, for use with
10384 // BIC and MVN instructions. It is not useful otherwise but is
10385 // implemented for compatibility.
10386 if (ARM_AM::getT2SOImmVal(~CVal) != -1)
10389 // A constant whose bitwise inverse can be used as an immediate
10390 // value in a data-processing instruction. This can be used in GCC
10391 // with a "B" modifier that prints the inverted value, for use with
10392 // BIC and MVN instructions. It is not useful otherwise but is
10393 // implemented for compatibility.
10394 if (ARM_AM::getSOImmVal(~CVal) != -1)
10400 if (Subtarget->isThumb1Only()) {
10401 // This must be a constant between -7 and 7,
10402 // for 3-operand ADD/SUB immediate instructions.
10403 if (CVal >= -7 && CVal < 7)
10405 } else if (Subtarget->isThumb2()) {
10406 // A constant whose negation can be used as an immediate value in a
10407 // data-processing instruction. This can be used in GCC with an "n"
10408 // modifier that prints the negated value, for use with SUB
10409 // instructions. It is not useful otherwise but is implemented for
10411 if (ARM_AM::getT2SOImmVal(-CVal) != -1)
10414 // A constant whose negation can be used as an immediate value in a
10415 // data-processing instruction. This can be used in GCC with an "n"
10416 // modifier that prints the negated value, for use with SUB
10417 // instructions. It is not useful otherwise but is implemented for
10419 if (ARM_AM::getSOImmVal(-CVal) != -1)
10425 if (Subtarget->isThumb()) { // FIXME thumb2
10426 // This must be a multiple of 4 between 0 and 1020, for
10427 // ADD sp + immediate.
10428 if ((CVal >= 0 && CVal <= 1020) && ((CVal & 3) == 0))
10431 // A power of two or a constant between 0 and 32. This is used in
10432 // GCC for the shift amount on shifted register operands, but it is
10433 // useful in general for any shift amounts.
10434 if ((CVal >= 0 && CVal <= 32) || ((CVal & (CVal - 1)) == 0))
10440 if (Subtarget->isThumb()) { // FIXME thumb2
10441 // This must be a constant between 0 and 31, for shift amounts.
10442 if (CVal >= 0 && CVal <= 31)
10448 if (Subtarget->isThumb()) { // FIXME thumb2
10449 // This must be a multiple of 4 between -508 and 508, for
10450 // ADD/SUB sp = sp + immediate.
10451 if ((CVal >= -508 && CVal <= 508) && ((CVal & 3) == 0))
10456 Result = DAG.getTargetConstant(CVal, Op.getValueType());
10460 if (Result.getNode()) {
10461 Ops.push_back(Result);
10464 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
10467 SDValue ARMTargetLowering::LowerDivRem(SDValue Op, SelectionDAG &DAG) const {
10468 assert(Subtarget->isTargetAEABI() && "Register-based DivRem lowering only");
10469 unsigned Opcode = Op->getOpcode();
10470 assert((Opcode == ISD::SDIVREM || Opcode == ISD::UDIVREM) &&
10471 "Invalid opcode for Div/Rem lowering");
10472 bool isSigned = (Opcode == ISD::SDIVREM);
10473 EVT VT = Op->getValueType(0);
10474 Type *Ty = VT.getTypeForEVT(*DAG.getContext());
10477 switch (VT.getSimpleVT().SimpleTy) {
10478 default: llvm_unreachable("Unexpected request for libcall!");
10479 case MVT::i8: LC= isSigned ? RTLIB::SDIVREM_I8 : RTLIB::UDIVREM_I8; break;
10480 case MVT::i16: LC= isSigned ? RTLIB::SDIVREM_I16 : RTLIB::UDIVREM_I16; break;
10481 case MVT::i32: LC= isSigned ? RTLIB::SDIVREM_I32 : RTLIB::UDIVREM_I32; break;
10482 case MVT::i64: LC= isSigned ? RTLIB::SDIVREM_I64 : RTLIB::UDIVREM_I64; break;
10485 SDValue InChain = DAG.getEntryNode();
10487 TargetLowering::ArgListTy Args;
10488 TargetLowering::ArgListEntry Entry;
10489 for (unsigned i = 0, e = Op->getNumOperands(); i != e; ++i) {
10490 EVT ArgVT = Op->getOperand(i).getValueType();
10491 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
10492 Entry.Node = Op->getOperand(i);
10494 Entry.isSExt = isSigned;
10495 Entry.isZExt = !isSigned;
10496 Args.push_back(Entry);
10499 SDValue Callee = DAG.getExternalSymbol(getLibcallName(LC),
10502 Type *RetTy = (Type*)StructType::get(Ty, Ty, NULL);
10506 CallLoweringInfo CLI(InChain, RetTy, isSigned, !isSigned, false, true,
10507 0, getLibcallCallingConv(LC), /*isTailCall=*/false,
10508 /*doesNotReturn=*/false, /*isReturnValueUsed=*/true,
10509 Callee, Args, DAG, dl);
10510 std::pair<SDValue, SDValue> CallInfo = LowerCallTo(CLI);
10512 return CallInfo.first;
10516 ARMTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
10517 // The ARM target isn't yet aware of offsets.
10521 bool ARM::isBitFieldInvertedMask(unsigned v) {
10522 if (v == 0xffffffff)
10525 // there can be 1's on either or both "outsides", all the "inside"
10526 // bits must be 0's
10527 unsigned TO = CountTrailingOnes_32(v);
10528 unsigned LO = CountLeadingOnes_32(v);
10529 v = (v >> TO) << TO;
10530 v = (v << LO) >> LO;
10534 /// isFPImmLegal - Returns true if the target can instruction select the
10535 /// specified FP immediate natively. If false, the legalizer will
10536 /// materialize the FP immediate as a load from a constant pool.
10537 bool ARMTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
10538 if (!Subtarget->hasVFP3())
10540 if (VT == MVT::f32)
10541 return ARM_AM::getFP32Imm(Imm) != -1;
10542 if (VT == MVT::f64)
10543 return ARM_AM::getFP64Imm(Imm) != -1;
10547 /// getTgtMemIntrinsic - Represent NEON load and store intrinsics as
10548 /// MemIntrinsicNodes. The associated MachineMemOperands record the alignment
10549 /// specified in the intrinsic calls.
10550 bool ARMTargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info,
10552 unsigned Intrinsic) const {
10553 switch (Intrinsic) {
10554 case Intrinsic::arm_neon_vld1:
10555 case Intrinsic::arm_neon_vld2:
10556 case Intrinsic::arm_neon_vld3:
10557 case Intrinsic::arm_neon_vld4:
10558 case Intrinsic::arm_neon_vld2lane:
10559 case Intrinsic::arm_neon_vld3lane:
10560 case Intrinsic::arm_neon_vld4lane: {
10561 Info.opc = ISD::INTRINSIC_W_CHAIN;
10562 // Conservatively set memVT to the entire set of vectors loaded.
10563 uint64_t NumElts = getDataLayout()->getTypeAllocSize(I.getType()) / 8;
10564 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
10565 Info.ptrVal = I.getArgOperand(0);
10567 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
10568 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
10569 Info.vol = false; // volatile loads with NEON intrinsics not supported
10570 Info.readMem = true;
10571 Info.writeMem = false;
10574 case Intrinsic::arm_neon_vst1:
10575 case Intrinsic::arm_neon_vst2:
10576 case Intrinsic::arm_neon_vst3:
10577 case Intrinsic::arm_neon_vst4:
10578 case Intrinsic::arm_neon_vst2lane:
10579 case Intrinsic::arm_neon_vst3lane:
10580 case Intrinsic::arm_neon_vst4lane: {
10581 Info.opc = ISD::INTRINSIC_VOID;
10582 // Conservatively set memVT to the entire set of vectors stored.
10583 unsigned NumElts = 0;
10584 for (unsigned ArgI = 1, ArgE = I.getNumArgOperands(); ArgI < ArgE; ++ArgI) {
10585 Type *ArgTy = I.getArgOperand(ArgI)->getType();
10586 if (!ArgTy->isVectorTy())
10588 NumElts += getDataLayout()->getTypeAllocSize(ArgTy) / 8;
10590 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
10591 Info.ptrVal = I.getArgOperand(0);
10593 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
10594 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
10595 Info.vol = false; // volatile stores with NEON intrinsics not supported
10596 Info.readMem = false;
10597 Info.writeMem = true;
10600 case Intrinsic::arm_ldaex:
10601 case Intrinsic::arm_ldrex: {
10602 PointerType *PtrTy = cast<PointerType>(I.getArgOperand(0)->getType());
10603 Info.opc = ISD::INTRINSIC_W_CHAIN;
10604 Info.memVT = MVT::getVT(PtrTy->getElementType());
10605 Info.ptrVal = I.getArgOperand(0);
10607 Info.align = getDataLayout()->getABITypeAlignment(PtrTy->getElementType());
10609 Info.readMem = true;
10610 Info.writeMem = false;
10613 case Intrinsic::arm_stlex:
10614 case Intrinsic::arm_strex: {
10615 PointerType *PtrTy = cast<PointerType>(I.getArgOperand(1)->getType());
10616 Info.opc = ISD::INTRINSIC_W_CHAIN;
10617 Info.memVT = MVT::getVT(PtrTy->getElementType());
10618 Info.ptrVal = I.getArgOperand(1);
10620 Info.align = getDataLayout()->getABITypeAlignment(PtrTy->getElementType());
10622 Info.readMem = false;
10623 Info.writeMem = true;
10626 case Intrinsic::arm_stlexd:
10627 case Intrinsic::arm_strexd: {
10628 Info.opc = ISD::INTRINSIC_W_CHAIN;
10629 Info.memVT = MVT::i64;
10630 Info.ptrVal = I.getArgOperand(2);
10634 Info.readMem = false;
10635 Info.writeMem = true;
10638 case Intrinsic::arm_ldaexd:
10639 case Intrinsic::arm_ldrexd: {
10640 Info.opc = ISD::INTRINSIC_W_CHAIN;
10641 Info.memVT = MVT::i64;
10642 Info.ptrVal = I.getArgOperand(0);
10646 Info.readMem = true;
10647 Info.writeMem = false;
10657 /// \brief Returns true if it is beneficial to convert a load of a constant
10658 /// to just the constant itself.
10659 bool ARMTargetLowering::shouldConvertConstantLoadToIntImm(const APInt &Imm,
10661 assert(Ty->isIntegerTy());
10663 unsigned Bits = Ty->getPrimitiveSizeInBits();
10664 if (Bits == 0 || Bits > 32)
10669 bool ARMTargetLowering::shouldExpandAtomicInIR(Instruction *Inst) const {
10670 // Loads and stores less than 64-bits are already atomic; ones above that
10671 // are doomed anyway, so defer to the default libcall and blame the OS when
10672 // things go wrong:
10673 if (StoreInst *SI = dyn_cast<StoreInst>(Inst))
10674 return SI->getValueOperand()->getType()->getPrimitiveSizeInBits() == 64;
10675 else if (LoadInst *LI = dyn_cast<LoadInst>(Inst))
10676 return LI->getType()->getPrimitiveSizeInBits() == 64;
10678 // For the real atomic operations, we have ldrex/strex up to 64 bits.
10679 return Inst->getType()->getPrimitiveSizeInBits() <= 64;
10682 Value *ARMTargetLowering::emitLoadLinked(IRBuilder<> &Builder, Value *Addr,
10683 AtomicOrdering Ord) const {
10684 Module *M = Builder.GetInsertBlock()->getParent()->getParent();
10685 Type *ValTy = cast<PointerType>(Addr->getType())->getElementType();
10687 Ord == Acquire || Ord == AcquireRelease || Ord == SequentiallyConsistent;
10689 // Since i64 isn't legal and intrinsics don't get type-lowered, the ldrexd
10690 // intrinsic must return {i32, i32} and we have to recombine them into a
10691 // single i64 here.
10692 if (ValTy->getPrimitiveSizeInBits() == 64) {
10693 Intrinsic::ID Int =
10694 IsAcquire ? Intrinsic::arm_ldaexd : Intrinsic::arm_ldrexd;
10695 Function *Ldrex = llvm::Intrinsic::getDeclaration(M, Int);
10697 Addr = Builder.CreateBitCast(Addr, Type::getInt8PtrTy(M->getContext()));
10698 Value *LoHi = Builder.CreateCall(Ldrex, Addr, "lohi");
10700 Value *Lo = Builder.CreateExtractValue(LoHi, 0, "lo");
10701 Value *Hi = Builder.CreateExtractValue(LoHi, 1, "hi");
10702 if (!Subtarget->isLittle())
10703 std::swap (Lo, Hi);
10704 Lo = Builder.CreateZExt(Lo, ValTy, "lo64");
10705 Hi = Builder.CreateZExt(Hi, ValTy, "hi64");
10706 return Builder.CreateOr(
10707 Lo, Builder.CreateShl(Hi, ConstantInt::get(ValTy, 32)), "val64");
10710 Type *Tys[] = { Addr->getType() };
10711 Intrinsic::ID Int = IsAcquire ? Intrinsic::arm_ldaex : Intrinsic::arm_ldrex;
10712 Function *Ldrex = llvm::Intrinsic::getDeclaration(M, Int, Tys);
10714 return Builder.CreateTruncOrBitCast(
10715 Builder.CreateCall(Ldrex, Addr),
10716 cast<PointerType>(Addr->getType())->getElementType());
10719 Value *ARMTargetLowering::emitStoreConditional(IRBuilder<> &Builder, Value *Val,
10721 AtomicOrdering Ord) const {
10722 Module *M = Builder.GetInsertBlock()->getParent()->getParent();
10724 Ord == Release || Ord == AcquireRelease || Ord == SequentiallyConsistent;
10726 // Since the intrinsics must have legal type, the i64 intrinsics take two
10727 // parameters: "i32, i32". We must marshal Val into the appropriate form
10728 // before the call.
10729 if (Val->getType()->getPrimitiveSizeInBits() == 64) {
10730 Intrinsic::ID Int =
10731 IsRelease ? Intrinsic::arm_stlexd : Intrinsic::arm_strexd;
10732 Function *Strex = Intrinsic::getDeclaration(M, Int);
10733 Type *Int32Ty = Type::getInt32Ty(M->getContext());
10735 Value *Lo = Builder.CreateTrunc(Val, Int32Ty, "lo");
10736 Value *Hi = Builder.CreateTrunc(Builder.CreateLShr(Val, 32), Int32Ty, "hi");
10737 if (!Subtarget->isLittle())
10738 std::swap (Lo, Hi);
10739 Addr = Builder.CreateBitCast(Addr, Type::getInt8PtrTy(M->getContext()));
10740 return Builder.CreateCall3(Strex, Lo, Hi, Addr);
10743 Intrinsic::ID Int = IsRelease ? Intrinsic::arm_stlex : Intrinsic::arm_strex;
10744 Type *Tys[] = { Addr->getType() };
10745 Function *Strex = Intrinsic::getDeclaration(M, Int, Tys);
10747 return Builder.CreateCall2(
10748 Strex, Builder.CreateZExtOrBitCast(
10749 Val, Strex->getFunctionType()->getParamType(0)),
10761 static bool isHomogeneousAggregate(Type *Ty, HABaseType &Base,
10762 uint64_t &Members) {
10763 if (const StructType *ST = dyn_cast<StructType>(Ty)) {
10764 for (unsigned i = 0; i < ST->getNumElements(); ++i) {
10765 uint64_t SubMembers = 0;
10766 if (!isHomogeneousAggregate(ST->getElementType(i), Base, SubMembers))
10768 Members += SubMembers;
10770 } else if (const ArrayType *AT = dyn_cast<ArrayType>(Ty)) {
10771 uint64_t SubMembers = 0;
10772 if (!isHomogeneousAggregate(AT->getElementType(), Base, SubMembers))
10774 Members += SubMembers * AT->getNumElements();
10775 } else if (Ty->isFloatTy()) {
10776 if (Base != HA_UNKNOWN && Base != HA_FLOAT)
10780 } else if (Ty->isDoubleTy()) {
10781 if (Base != HA_UNKNOWN && Base != HA_DOUBLE)
10785 } else if (const VectorType *VT = dyn_cast<VectorType>(Ty)) {
10792 return VT->getBitWidth() == 64;
10794 return VT->getBitWidth() == 128;
10796 switch (VT->getBitWidth()) {
10809 return (Members > 0 && Members <= 4);
10812 /// \brief Return true if a type is an AAPCS-VFP homogeneous aggregate.
10813 bool ARMTargetLowering::functionArgumentNeedsConsecutiveRegisters(
10814 Type *Ty, CallingConv::ID CallConv, bool isVarArg) const {
10815 if (getEffectiveCallingConv(CallConv, isVarArg) ==
10816 CallingConv::ARM_AAPCS_VFP) {
10817 HABaseType Base = HA_UNKNOWN;
10818 uint64_t Members = 0;
10819 bool result = isHomogeneousAggregate(Ty, Base, Members);
10820 DEBUG(dbgs() << "isHA: " << result << " "; Ty->dump(); dbgs() << "\n");