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 #define DEBUG_TYPE "arm-isel"
16 #include "ARMISelLowering.h"
18 #include "ARMCallingConv.h"
19 #include "ARMConstantPoolValue.h"
20 #include "ARMMachineFunctionInfo.h"
21 #include "ARMPerfectShuffle.h"
22 #include "ARMSubtarget.h"
23 #include "ARMTargetMachine.h"
24 #include "ARMTargetObjectFile.h"
25 #include "MCTargetDesc/ARMAddressingModes.h"
26 #include "llvm/CallingConv.h"
27 #include "llvm/Constants.h"
28 #include "llvm/Function.h"
29 #include "llvm/GlobalValue.h"
30 #include "llvm/Instruction.h"
31 #include "llvm/Instructions.h"
32 #include "llvm/Intrinsics.h"
33 #include "llvm/Type.h"
34 #include "llvm/CodeGen/CallingConvLower.h"
35 #include "llvm/CodeGen/IntrinsicLowering.h"
36 #include "llvm/CodeGen/MachineBasicBlock.h"
37 #include "llvm/CodeGen/MachineFrameInfo.h"
38 #include "llvm/CodeGen/MachineFunction.h"
39 #include "llvm/CodeGen/MachineInstrBuilder.h"
40 #include "llvm/CodeGen/MachineModuleInfo.h"
41 #include "llvm/CodeGen/MachineRegisterInfo.h"
42 #include "llvm/CodeGen/SelectionDAG.h"
43 #include "llvm/MC/MCSectionMachO.h"
44 #include "llvm/Target/TargetOptions.h"
45 #include "llvm/ADT/StringExtras.h"
46 #include "llvm/ADT/Statistic.h"
47 #include "llvm/Support/CommandLine.h"
48 #include "llvm/Support/ErrorHandling.h"
49 #include "llvm/Support/MathExtras.h"
50 #include "llvm/Support/raw_ostream.h"
53 STATISTIC(NumTailCalls, "Number of tail calls");
54 STATISTIC(NumMovwMovt, "Number of GAs materialized with movw + movt");
55 STATISTIC(NumLoopByVals, "Number of loops generated for byval arguments");
57 // This option should go away when tail calls fully work.
59 EnableARMTailCalls("arm-tail-calls", cl::Hidden,
60 cl::desc("Generate tail calls (TEMPORARY OPTION)."),
64 EnableARMLongCalls("arm-long-calls", cl::Hidden,
65 cl::desc("Generate calls via indirect call instructions"),
69 ARMInterworking("arm-interworking", cl::Hidden,
70 cl::desc("Enable / disable ARM interworking (for debugging only)"),
74 class ARMCCState : public CCState {
76 ARMCCState(CallingConv::ID CC, bool isVarArg, MachineFunction &MF,
77 const TargetMachine &TM, SmallVector<CCValAssign, 16> &locs,
78 LLVMContext &C, ParmContext PC)
79 : CCState(CC, isVarArg, MF, TM, locs, C) {
80 assert(((PC == Call) || (PC == Prologue)) &&
81 "ARMCCState users must specify whether their context is call"
82 "or prologue generation.");
88 // The APCS parameter registers.
89 static const uint16_t GPRArgRegs[] = {
90 ARM::R0, ARM::R1, ARM::R2, ARM::R3
93 void ARMTargetLowering::addTypeForNEON(MVT VT, MVT PromotedLdStVT,
94 MVT PromotedBitwiseVT) {
95 if (VT != PromotedLdStVT) {
96 setOperationAction(ISD::LOAD, VT, Promote);
97 AddPromotedToType (ISD::LOAD, VT, PromotedLdStVT);
99 setOperationAction(ISD::STORE, VT, Promote);
100 AddPromotedToType (ISD::STORE, VT, PromotedLdStVT);
103 MVT ElemTy = VT.getVectorElementType();
104 if (ElemTy != MVT::i64 && ElemTy != MVT::f64)
105 setOperationAction(ISD::SETCC, VT, Custom);
106 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom);
107 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
108 if (ElemTy == MVT::i32) {
109 setOperationAction(ISD::SINT_TO_FP, VT, Custom);
110 setOperationAction(ISD::UINT_TO_FP, VT, Custom);
111 setOperationAction(ISD::FP_TO_SINT, VT, Custom);
112 setOperationAction(ISD::FP_TO_UINT, VT, Custom);
114 setOperationAction(ISD::SINT_TO_FP, VT, Expand);
115 setOperationAction(ISD::UINT_TO_FP, VT, Expand);
116 setOperationAction(ISD::FP_TO_SINT, VT, Expand);
117 setOperationAction(ISD::FP_TO_UINT, VT, Expand);
119 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
120 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
121 setOperationAction(ISD::CONCAT_VECTORS, VT, Legal);
122 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Legal);
123 setOperationAction(ISD::SELECT, VT, Expand);
124 setOperationAction(ISD::SELECT_CC, VT, Expand);
125 setOperationAction(ISD::SIGN_EXTEND_INREG, VT, Expand);
126 if (VT.isInteger()) {
127 setOperationAction(ISD::SHL, VT, Custom);
128 setOperationAction(ISD::SRA, VT, Custom);
129 setOperationAction(ISD::SRL, VT, Custom);
132 // Promote all bit-wise operations.
133 if (VT.isInteger() && VT != PromotedBitwiseVT) {
134 setOperationAction(ISD::AND, VT, Promote);
135 AddPromotedToType (ISD::AND, VT, PromotedBitwiseVT);
136 setOperationAction(ISD::OR, VT, Promote);
137 AddPromotedToType (ISD::OR, VT, PromotedBitwiseVT);
138 setOperationAction(ISD::XOR, VT, Promote);
139 AddPromotedToType (ISD::XOR, VT, PromotedBitwiseVT);
142 // Neon does not support vector divide/remainder operations.
143 setOperationAction(ISD::SDIV, VT, Expand);
144 setOperationAction(ISD::UDIV, VT, Expand);
145 setOperationAction(ISD::FDIV, VT, Expand);
146 setOperationAction(ISD::SREM, VT, Expand);
147 setOperationAction(ISD::UREM, VT, Expand);
148 setOperationAction(ISD::FREM, VT, Expand);
151 void ARMTargetLowering::addDRTypeForNEON(MVT VT) {
152 addRegisterClass(VT, &ARM::DPRRegClass);
153 addTypeForNEON(VT, MVT::f64, MVT::v2i32);
156 void ARMTargetLowering::addQRTypeForNEON(MVT VT) {
157 addRegisterClass(VT, &ARM::QPRRegClass);
158 addTypeForNEON(VT, MVT::v2f64, MVT::v4i32);
161 static TargetLoweringObjectFile *createTLOF(TargetMachine &TM) {
162 if (TM.getSubtarget<ARMSubtarget>().isTargetDarwin())
163 return new TargetLoweringObjectFileMachO();
165 return new ARMElfTargetObjectFile();
168 ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
169 : TargetLowering(TM, createTLOF(TM)) {
170 Subtarget = &TM.getSubtarget<ARMSubtarget>();
171 RegInfo = TM.getRegisterInfo();
172 Itins = TM.getInstrItineraryData();
174 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
176 if (Subtarget->isTargetDarwin()) {
177 // Uses VFP for Thumb libfuncs if available.
178 if (Subtarget->isThumb() && Subtarget->hasVFP2()) {
179 // Single-precision floating-point arithmetic.
180 setLibcallName(RTLIB::ADD_F32, "__addsf3vfp");
181 setLibcallName(RTLIB::SUB_F32, "__subsf3vfp");
182 setLibcallName(RTLIB::MUL_F32, "__mulsf3vfp");
183 setLibcallName(RTLIB::DIV_F32, "__divsf3vfp");
185 // Double-precision floating-point arithmetic.
186 setLibcallName(RTLIB::ADD_F64, "__adddf3vfp");
187 setLibcallName(RTLIB::SUB_F64, "__subdf3vfp");
188 setLibcallName(RTLIB::MUL_F64, "__muldf3vfp");
189 setLibcallName(RTLIB::DIV_F64, "__divdf3vfp");
191 // Single-precision comparisons.
192 setLibcallName(RTLIB::OEQ_F32, "__eqsf2vfp");
193 setLibcallName(RTLIB::UNE_F32, "__nesf2vfp");
194 setLibcallName(RTLIB::OLT_F32, "__ltsf2vfp");
195 setLibcallName(RTLIB::OLE_F32, "__lesf2vfp");
196 setLibcallName(RTLIB::OGE_F32, "__gesf2vfp");
197 setLibcallName(RTLIB::OGT_F32, "__gtsf2vfp");
198 setLibcallName(RTLIB::UO_F32, "__unordsf2vfp");
199 setLibcallName(RTLIB::O_F32, "__unordsf2vfp");
201 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
202 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETNE);
203 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
204 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
205 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
206 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
207 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
208 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
210 // Double-precision comparisons.
211 setLibcallName(RTLIB::OEQ_F64, "__eqdf2vfp");
212 setLibcallName(RTLIB::UNE_F64, "__nedf2vfp");
213 setLibcallName(RTLIB::OLT_F64, "__ltdf2vfp");
214 setLibcallName(RTLIB::OLE_F64, "__ledf2vfp");
215 setLibcallName(RTLIB::OGE_F64, "__gedf2vfp");
216 setLibcallName(RTLIB::OGT_F64, "__gtdf2vfp");
217 setLibcallName(RTLIB::UO_F64, "__unorddf2vfp");
218 setLibcallName(RTLIB::O_F64, "__unorddf2vfp");
220 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
221 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETNE);
222 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
223 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
224 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
225 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
226 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
227 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
229 // Floating-point to integer conversions.
230 // i64 conversions are done via library routines even when generating VFP
231 // instructions, so use the same ones.
232 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__fixdfsivfp");
233 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__fixunsdfsivfp");
234 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__fixsfsivfp");
235 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__fixunssfsivfp");
237 // Conversions between floating types.
238 setLibcallName(RTLIB::FPROUND_F64_F32, "__truncdfsf2vfp");
239 setLibcallName(RTLIB::FPEXT_F32_F64, "__extendsfdf2vfp");
241 // Integer to floating-point conversions.
242 // i64 conversions are done via library routines even when generating VFP
243 // instructions, so use the same ones.
244 // FIXME: There appears to be some naming inconsistency in ARM libgcc:
245 // e.g., __floatunsidf vs. __floatunssidfvfp.
246 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__floatsidfvfp");
247 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__floatunssidfvfp");
248 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__floatsisfvfp");
249 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__floatunssisfvfp");
253 // These libcalls are not available in 32-bit.
254 setLibcallName(RTLIB::SHL_I128, 0);
255 setLibcallName(RTLIB::SRL_I128, 0);
256 setLibcallName(RTLIB::SRA_I128, 0);
258 if (Subtarget->isAAPCS_ABI() && !Subtarget->isTargetDarwin()) {
259 // Double-precision floating-point arithmetic helper functions
260 // RTABI chapter 4.1.2, Table 2
261 setLibcallName(RTLIB::ADD_F64, "__aeabi_dadd");
262 setLibcallName(RTLIB::DIV_F64, "__aeabi_ddiv");
263 setLibcallName(RTLIB::MUL_F64, "__aeabi_dmul");
264 setLibcallName(RTLIB::SUB_F64, "__aeabi_dsub");
265 setLibcallCallingConv(RTLIB::ADD_F64, CallingConv::ARM_AAPCS);
266 setLibcallCallingConv(RTLIB::DIV_F64, CallingConv::ARM_AAPCS);
267 setLibcallCallingConv(RTLIB::MUL_F64, CallingConv::ARM_AAPCS);
268 setLibcallCallingConv(RTLIB::SUB_F64, CallingConv::ARM_AAPCS);
270 // Double-precision floating-point comparison helper functions
271 // RTABI chapter 4.1.2, Table 3
272 setLibcallName(RTLIB::OEQ_F64, "__aeabi_dcmpeq");
273 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
274 setLibcallName(RTLIB::UNE_F64, "__aeabi_dcmpeq");
275 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETEQ);
276 setLibcallName(RTLIB::OLT_F64, "__aeabi_dcmplt");
277 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
278 setLibcallName(RTLIB::OLE_F64, "__aeabi_dcmple");
279 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
280 setLibcallName(RTLIB::OGE_F64, "__aeabi_dcmpge");
281 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
282 setLibcallName(RTLIB::OGT_F64, "__aeabi_dcmpgt");
283 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
284 setLibcallName(RTLIB::UO_F64, "__aeabi_dcmpun");
285 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
286 setLibcallName(RTLIB::O_F64, "__aeabi_dcmpun");
287 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
288 setLibcallCallingConv(RTLIB::OEQ_F64, CallingConv::ARM_AAPCS);
289 setLibcallCallingConv(RTLIB::UNE_F64, CallingConv::ARM_AAPCS);
290 setLibcallCallingConv(RTLIB::OLT_F64, CallingConv::ARM_AAPCS);
291 setLibcallCallingConv(RTLIB::OLE_F64, CallingConv::ARM_AAPCS);
292 setLibcallCallingConv(RTLIB::OGE_F64, CallingConv::ARM_AAPCS);
293 setLibcallCallingConv(RTLIB::OGT_F64, CallingConv::ARM_AAPCS);
294 setLibcallCallingConv(RTLIB::UO_F64, CallingConv::ARM_AAPCS);
295 setLibcallCallingConv(RTLIB::O_F64, CallingConv::ARM_AAPCS);
297 // Single-precision floating-point arithmetic helper functions
298 // RTABI chapter 4.1.2, Table 4
299 setLibcallName(RTLIB::ADD_F32, "__aeabi_fadd");
300 setLibcallName(RTLIB::DIV_F32, "__aeabi_fdiv");
301 setLibcallName(RTLIB::MUL_F32, "__aeabi_fmul");
302 setLibcallName(RTLIB::SUB_F32, "__aeabi_fsub");
303 setLibcallCallingConv(RTLIB::ADD_F32, CallingConv::ARM_AAPCS);
304 setLibcallCallingConv(RTLIB::DIV_F32, CallingConv::ARM_AAPCS);
305 setLibcallCallingConv(RTLIB::MUL_F32, CallingConv::ARM_AAPCS);
306 setLibcallCallingConv(RTLIB::SUB_F32, CallingConv::ARM_AAPCS);
308 // Single-precision floating-point comparison helper functions
309 // RTABI chapter 4.1.2, Table 5
310 setLibcallName(RTLIB::OEQ_F32, "__aeabi_fcmpeq");
311 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
312 setLibcallName(RTLIB::UNE_F32, "__aeabi_fcmpeq");
313 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETEQ);
314 setLibcallName(RTLIB::OLT_F32, "__aeabi_fcmplt");
315 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
316 setLibcallName(RTLIB::OLE_F32, "__aeabi_fcmple");
317 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
318 setLibcallName(RTLIB::OGE_F32, "__aeabi_fcmpge");
319 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
320 setLibcallName(RTLIB::OGT_F32, "__aeabi_fcmpgt");
321 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
322 setLibcallName(RTLIB::UO_F32, "__aeabi_fcmpun");
323 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
324 setLibcallName(RTLIB::O_F32, "__aeabi_fcmpun");
325 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
326 setLibcallCallingConv(RTLIB::OEQ_F32, CallingConv::ARM_AAPCS);
327 setLibcallCallingConv(RTLIB::UNE_F32, CallingConv::ARM_AAPCS);
328 setLibcallCallingConv(RTLIB::OLT_F32, CallingConv::ARM_AAPCS);
329 setLibcallCallingConv(RTLIB::OLE_F32, CallingConv::ARM_AAPCS);
330 setLibcallCallingConv(RTLIB::OGE_F32, CallingConv::ARM_AAPCS);
331 setLibcallCallingConv(RTLIB::OGT_F32, CallingConv::ARM_AAPCS);
332 setLibcallCallingConv(RTLIB::UO_F32, CallingConv::ARM_AAPCS);
333 setLibcallCallingConv(RTLIB::O_F32, CallingConv::ARM_AAPCS);
335 // Floating-point to integer conversions.
336 // RTABI chapter 4.1.2, Table 6
337 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__aeabi_d2iz");
338 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__aeabi_d2uiz");
339 setLibcallName(RTLIB::FPTOSINT_F64_I64, "__aeabi_d2lz");
340 setLibcallName(RTLIB::FPTOUINT_F64_I64, "__aeabi_d2ulz");
341 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__aeabi_f2iz");
342 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__aeabi_f2uiz");
343 setLibcallName(RTLIB::FPTOSINT_F32_I64, "__aeabi_f2lz");
344 setLibcallName(RTLIB::FPTOUINT_F32_I64, "__aeabi_f2ulz");
345 setLibcallCallingConv(RTLIB::FPTOSINT_F64_I32, CallingConv::ARM_AAPCS);
346 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I32, CallingConv::ARM_AAPCS);
347 setLibcallCallingConv(RTLIB::FPTOSINT_F64_I64, CallingConv::ARM_AAPCS);
348 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I64, CallingConv::ARM_AAPCS);
349 setLibcallCallingConv(RTLIB::FPTOSINT_F32_I32, CallingConv::ARM_AAPCS);
350 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I32, CallingConv::ARM_AAPCS);
351 setLibcallCallingConv(RTLIB::FPTOSINT_F32_I64, CallingConv::ARM_AAPCS);
352 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I64, CallingConv::ARM_AAPCS);
354 // Conversions between floating types.
355 // RTABI chapter 4.1.2, Table 7
356 setLibcallName(RTLIB::FPROUND_F64_F32, "__aeabi_d2f");
357 setLibcallName(RTLIB::FPEXT_F32_F64, "__aeabi_f2d");
358 setLibcallCallingConv(RTLIB::FPROUND_F64_F32, CallingConv::ARM_AAPCS);
359 setLibcallCallingConv(RTLIB::FPEXT_F32_F64, CallingConv::ARM_AAPCS);
361 // Integer to floating-point conversions.
362 // RTABI chapter 4.1.2, Table 8
363 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__aeabi_i2d");
364 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__aeabi_ui2d");
365 setLibcallName(RTLIB::SINTTOFP_I64_F64, "__aeabi_l2d");
366 setLibcallName(RTLIB::UINTTOFP_I64_F64, "__aeabi_ul2d");
367 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__aeabi_i2f");
368 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__aeabi_ui2f");
369 setLibcallName(RTLIB::SINTTOFP_I64_F32, "__aeabi_l2f");
370 setLibcallName(RTLIB::UINTTOFP_I64_F32, "__aeabi_ul2f");
371 setLibcallCallingConv(RTLIB::SINTTOFP_I32_F64, CallingConv::ARM_AAPCS);
372 setLibcallCallingConv(RTLIB::UINTTOFP_I32_F64, CallingConv::ARM_AAPCS);
373 setLibcallCallingConv(RTLIB::SINTTOFP_I64_F64, CallingConv::ARM_AAPCS);
374 setLibcallCallingConv(RTLIB::UINTTOFP_I64_F64, CallingConv::ARM_AAPCS);
375 setLibcallCallingConv(RTLIB::SINTTOFP_I32_F32, CallingConv::ARM_AAPCS);
376 setLibcallCallingConv(RTLIB::UINTTOFP_I32_F32, CallingConv::ARM_AAPCS);
377 setLibcallCallingConv(RTLIB::SINTTOFP_I64_F32, CallingConv::ARM_AAPCS);
378 setLibcallCallingConv(RTLIB::UINTTOFP_I64_F32, CallingConv::ARM_AAPCS);
380 // Long long helper functions
381 // RTABI chapter 4.2, Table 9
382 setLibcallName(RTLIB::MUL_I64, "__aeabi_lmul");
383 setLibcallName(RTLIB::SHL_I64, "__aeabi_llsl");
384 setLibcallName(RTLIB::SRL_I64, "__aeabi_llsr");
385 setLibcallName(RTLIB::SRA_I64, "__aeabi_lasr");
386 setLibcallCallingConv(RTLIB::MUL_I64, CallingConv::ARM_AAPCS);
387 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::ARM_AAPCS);
388 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::ARM_AAPCS);
389 setLibcallCallingConv(RTLIB::SHL_I64, CallingConv::ARM_AAPCS);
390 setLibcallCallingConv(RTLIB::SRL_I64, CallingConv::ARM_AAPCS);
391 setLibcallCallingConv(RTLIB::SRA_I64, CallingConv::ARM_AAPCS);
393 // Integer division functions
394 // RTABI chapter 4.3.1
395 setLibcallName(RTLIB::SDIV_I8, "__aeabi_idiv");
396 setLibcallName(RTLIB::SDIV_I16, "__aeabi_idiv");
397 setLibcallName(RTLIB::SDIV_I32, "__aeabi_idiv");
398 setLibcallName(RTLIB::SDIV_I64, "__aeabi_ldivmod");
399 setLibcallName(RTLIB::UDIV_I8, "__aeabi_uidiv");
400 setLibcallName(RTLIB::UDIV_I16, "__aeabi_uidiv");
401 setLibcallName(RTLIB::UDIV_I32, "__aeabi_uidiv");
402 setLibcallName(RTLIB::UDIV_I64, "__aeabi_uldivmod");
403 setLibcallCallingConv(RTLIB::SDIV_I8, CallingConv::ARM_AAPCS);
404 setLibcallCallingConv(RTLIB::SDIV_I16, CallingConv::ARM_AAPCS);
405 setLibcallCallingConv(RTLIB::SDIV_I32, CallingConv::ARM_AAPCS);
406 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::ARM_AAPCS);
407 setLibcallCallingConv(RTLIB::UDIV_I8, CallingConv::ARM_AAPCS);
408 setLibcallCallingConv(RTLIB::UDIV_I16, CallingConv::ARM_AAPCS);
409 setLibcallCallingConv(RTLIB::UDIV_I32, CallingConv::ARM_AAPCS);
410 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::ARM_AAPCS);
413 // RTABI chapter 4.3.4
414 setLibcallName(RTLIB::MEMCPY, "__aeabi_memcpy");
415 setLibcallName(RTLIB::MEMMOVE, "__aeabi_memmove");
416 setLibcallName(RTLIB::MEMSET, "__aeabi_memset");
417 setLibcallCallingConv(RTLIB::MEMCPY, CallingConv::ARM_AAPCS);
418 setLibcallCallingConv(RTLIB::MEMMOVE, CallingConv::ARM_AAPCS);
419 setLibcallCallingConv(RTLIB::MEMSET, CallingConv::ARM_AAPCS);
422 // Use divmod compiler-rt calls for iOS 5.0 and later.
423 if (Subtarget->getTargetTriple().getOS() == Triple::IOS &&
424 !Subtarget->getTargetTriple().isOSVersionLT(5, 0)) {
425 setLibcallName(RTLIB::SDIVREM_I32, "__divmodsi4");
426 setLibcallName(RTLIB::UDIVREM_I32, "__udivmodsi4");
429 if (Subtarget->isThumb1Only())
430 addRegisterClass(MVT::i32, &ARM::tGPRRegClass);
432 addRegisterClass(MVT::i32, &ARM::GPRRegClass);
433 if (!TM.Options.UseSoftFloat && Subtarget->hasVFP2() &&
434 !Subtarget->isThumb1Only()) {
435 addRegisterClass(MVT::f32, &ARM::SPRRegClass);
436 if (!Subtarget->isFPOnlySP())
437 addRegisterClass(MVT::f64, &ARM::DPRRegClass);
439 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
442 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
443 VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
444 for (unsigned InnerVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
445 InnerVT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
446 setTruncStoreAction((MVT::SimpleValueType)VT,
447 (MVT::SimpleValueType)InnerVT, Expand);
448 setLoadExtAction(ISD::SEXTLOAD, (MVT::SimpleValueType)VT, Expand);
449 setLoadExtAction(ISD::ZEXTLOAD, (MVT::SimpleValueType)VT, Expand);
450 setLoadExtAction(ISD::EXTLOAD, (MVT::SimpleValueType)VT, Expand);
453 setOperationAction(ISD::ConstantFP, MVT::f32, Custom);
455 if (Subtarget->hasNEON()) {
456 addDRTypeForNEON(MVT::v2f32);
457 addDRTypeForNEON(MVT::v8i8);
458 addDRTypeForNEON(MVT::v4i16);
459 addDRTypeForNEON(MVT::v2i32);
460 addDRTypeForNEON(MVT::v1i64);
462 addQRTypeForNEON(MVT::v4f32);
463 addQRTypeForNEON(MVT::v2f64);
464 addQRTypeForNEON(MVT::v16i8);
465 addQRTypeForNEON(MVT::v8i16);
466 addQRTypeForNEON(MVT::v4i32);
467 addQRTypeForNEON(MVT::v2i64);
469 // v2f64 is legal so that QR subregs can be extracted as f64 elements, but
470 // neither Neon nor VFP support any arithmetic operations on it.
471 // The same with v4f32. But keep in mind that vadd, vsub, vmul are natively
472 // supported for v4f32.
473 setOperationAction(ISD::FADD, MVT::v2f64, Expand);
474 setOperationAction(ISD::FSUB, MVT::v2f64, Expand);
475 setOperationAction(ISD::FMUL, MVT::v2f64, Expand);
476 // FIXME: Code duplication: FDIV and FREM are expanded always, see
477 // ARMTargetLowering::addTypeForNEON method for details.
478 setOperationAction(ISD::FDIV, MVT::v2f64, Expand);
479 setOperationAction(ISD::FREM, MVT::v2f64, Expand);
480 // FIXME: Create unittest.
481 // In another words, find a way when "copysign" appears in DAG with vector
483 setOperationAction(ISD::FCOPYSIGN, MVT::v2f64, Expand);
484 // FIXME: Code duplication: SETCC has custom operation action, see
485 // ARMTargetLowering::addTypeForNEON method for details.
486 setOperationAction(ISD::SETCC, MVT::v2f64, Expand);
487 // FIXME: Create unittest for FNEG and for FABS.
488 setOperationAction(ISD::FNEG, MVT::v2f64, Expand);
489 setOperationAction(ISD::FABS, MVT::v2f64, Expand);
490 setOperationAction(ISD::FSQRT, MVT::v2f64, Expand);
491 setOperationAction(ISD::FSIN, MVT::v2f64, Expand);
492 setOperationAction(ISD::FCOS, MVT::v2f64, Expand);
493 setOperationAction(ISD::FPOWI, MVT::v2f64, Expand);
494 setOperationAction(ISD::FPOW, MVT::v2f64, Expand);
495 setOperationAction(ISD::FLOG, MVT::v2f64, Expand);
496 setOperationAction(ISD::FLOG2, MVT::v2f64, Expand);
497 setOperationAction(ISD::FLOG10, MVT::v2f64, Expand);
498 setOperationAction(ISD::FEXP, MVT::v2f64, Expand);
499 setOperationAction(ISD::FEXP2, MVT::v2f64, Expand);
500 // FIXME: Create unittest for FCEIL, FTRUNC, FRINT, FNEARBYINT, FFLOOR.
501 setOperationAction(ISD::FCEIL, MVT::v2f64, Expand);
502 setOperationAction(ISD::FTRUNC, MVT::v2f64, Expand);
503 setOperationAction(ISD::FRINT, MVT::v2f64, Expand);
504 setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Expand);
505 setOperationAction(ISD::FFLOOR, MVT::v2f64, Expand);
507 setOperationAction(ISD::FSQRT, MVT::v4f32, Expand);
508 setOperationAction(ISD::FSIN, MVT::v4f32, Expand);
509 setOperationAction(ISD::FCOS, MVT::v4f32, Expand);
510 setOperationAction(ISD::FPOWI, MVT::v4f32, Expand);
511 setOperationAction(ISD::FPOW, MVT::v4f32, Expand);
512 setOperationAction(ISD::FLOG, MVT::v4f32, Expand);
513 setOperationAction(ISD::FLOG2, MVT::v4f32, Expand);
514 setOperationAction(ISD::FLOG10, MVT::v4f32, Expand);
515 setOperationAction(ISD::FEXP, MVT::v4f32, Expand);
516 setOperationAction(ISD::FEXP2, MVT::v4f32, Expand);
518 // Neon does not support some operations on v1i64 and v2i64 types.
519 setOperationAction(ISD::MUL, MVT::v1i64, Expand);
520 // Custom handling for some quad-vector types to detect VMULL.
521 setOperationAction(ISD::MUL, MVT::v8i16, Custom);
522 setOperationAction(ISD::MUL, MVT::v4i32, Custom);
523 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
524 // Custom handling for some vector types to avoid expensive expansions
525 setOperationAction(ISD::SDIV, MVT::v4i16, Custom);
526 setOperationAction(ISD::SDIV, MVT::v8i8, Custom);
527 setOperationAction(ISD::UDIV, MVT::v4i16, Custom);
528 setOperationAction(ISD::UDIV, MVT::v8i8, Custom);
529 setOperationAction(ISD::SETCC, MVT::v1i64, Expand);
530 setOperationAction(ISD::SETCC, MVT::v2i64, Expand);
531 // Neon does not have single instruction SINT_TO_FP and UINT_TO_FP with
532 // a destination type that is wider than the source, and nor does
533 // it have a FP_TO_[SU]INT instruction with a narrower destination than
535 setOperationAction(ISD::SINT_TO_FP, MVT::v4i16, Custom);
536 setOperationAction(ISD::UINT_TO_FP, MVT::v4i16, Custom);
537 setOperationAction(ISD::FP_TO_UINT, MVT::v4i16, Custom);
538 setOperationAction(ISD::FP_TO_SINT, MVT::v4i16, Custom);
540 setTargetDAGCombine(ISD::INTRINSIC_VOID);
541 setTargetDAGCombine(ISD::INTRINSIC_W_CHAIN);
542 setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);
543 setTargetDAGCombine(ISD::SHL);
544 setTargetDAGCombine(ISD::SRL);
545 setTargetDAGCombine(ISD::SRA);
546 setTargetDAGCombine(ISD::SIGN_EXTEND);
547 setTargetDAGCombine(ISD::ZERO_EXTEND);
548 setTargetDAGCombine(ISD::ANY_EXTEND);
549 setTargetDAGCombine(ISD::SELECT_CC);
550 setTargetDAGCombine(ISD::BUILD_VECTOR);
551 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
552 setTargetDAGCombine(ISD::INSERT_VECTOR_ELT);
553 setTargetDAGCombine(ISD::STORE);
554 setTargetDAGCombine(ISD::FP_TO_SINT);
555 setTargetDAGCombine(ISD::FP_TO_UINT);
556 setTargetDAGCombine(ISD::FDIV);
558 // It is legal to extload from v4i8 to v4i16 or v4i32.
559 MVT Tys[6] = {MVT::v8i8, MVT::v4i8, MVT::v2i8,
560 MVT::v4i16, MVT::v2i16,
562 for (unsigned i = 0; i < 6; ++i) {
563 setLoadExtAction(ISD::EXTLOAD, Tys[i], Legal);
564 setLoadExtAction(ISD::ZEXTLOAD, Tys[i], Legal);
565 setLoadExtAction(ISD::SEXTLOAD, Tys[i], Legal);
569 computeRegisterProperties();
571 // ARM does not have f32 extending load.
572 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
574 // ARM does not have i1 sign extending load.
575 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
577 // ARM supports all 4 flavors of integer indexed load / store.
578 if (!Subtarget->isThumb1Only()) {
579 for (unsigned im = (unsigned)ISD::PRE_INC;
580 im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) {
581 setIndexedLoadAction(im, MVT::i1, Legal);
582 setIndexedLoadAction(im, MVT::i8, Legal);
583 setIndexedLoadAction(im, MVT::i16, Legal);
584 setIndexedLoadAction(im, MVT::i32, Legal);
585 setIndexedStoreAction(im, MVT::i1, Legal);
586 setIndexedStoreAction(im, MVT::i8, Legal);
587 setIndexedStoreAction(im, MVT::i16, Legal);
588 setIndexedStoreAction(im, MVT::i32, Legal);
592 // i64 operation support.
593 setOperationAction(ISD::MUL, MVT::i64, Expand);
594 setOperationAction(ISD::MULHU, MVT::i32, Expand);
595 if (Subtarget->isThumb1Only()) {
596 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
597 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
599 if (Subtarget->isThumb1Only() || !Subtarget->hasV6Ops()
600 || (Subtarget->isThumb2() && !Subtarget->hasThumb2DSP()))
601 setOperationAction(ISD::MULHS, MVT::i32, Expand);
603 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
604 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
605 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
606 setOperationAction(ISD::SRL, MVT::i64, Custom);
607 setOperationAction(ISD::SRA, MVT::i64, Custom);
609 if (!Subtarget->isThumb1Only()) {
610 // FIXME: We should do this for Thumb1 as well.
611 setOperationAction(ISD::ADDC, MVT::i32, Custom);
612 setOperationAction(ISD::ADDE, MVT::i32, Custom);
613 setOperationAction(ISD::SUBC, MVT::i32, Custom);
614 setOperationAction(ISD::SUBE, MVT::i32, Custom);
617 // ARM does not have ROTL.
618 setOperationAction(ISD::ROTL, MVT::i32, Expand);
619 setOperationAction(ISD::CTTZ, MVT::i32, Custom);
620 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
621 if (!Subtarget->hasV5TOps() || Subtarget->isThumb1Only())
622 setOperationAction(ISD::CTLZ, MVT::i32, Expand);
624 // These just redirect to CTTZ and CTLZ on ARM.
625 setOperationAction(ISD::CTTZ_ZERO_UNDEF , MVT::i32 , Expand);
626 setOperationAction(ISD::CTLZ_ZERO_UNDEF , MVT::i32 , Expand);
628 // Only ARMv6 has BSWAP.
629 if (!Subtarget->hasV6Ops())
630 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
632 // These are expanded into libcalls.
633 if (!Subtarget->hasDivide() || !Subtarget->isThumb2()) {
634 // v7M has a hardware divider
635 setOperationAction(ISD::SDIV, MVT::i32, Expand);
636 setOperationAction(ISD::UDIV, MVT::i32, Expand);
638 setOperationAction(ISD::SREM, MVT::i32, Expand);
639 setOperationAction(ISD::UREM, MVT::i32, Expand);
640 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
641 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
643 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
644 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
645 setOperationAction(ISD::GLOBAL_OFFSET_TABLE, MVT::i32, Custom);
646 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
647 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
649 setOperationAction(ISD::TRAP, MVT::Other, Legal);
651 // Use the default implementation.
652 setOperationAction(ISD::VASTART, MVT::Other, Custom);
653 setOperationAction(ISD::VAARG, MVT::Other, Expand);
654 setOperationAction(ISD::VACOPY, MVT::Other, Expand);
655 setOperationAction(ISD::VAEND, MVT::Other, Expand);
656 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
657 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
659 if (!Subtarget->isTargetDarwin()) {
660 // Non-Darwin platforms may return values in these registers via the
661 // personality function.
662 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
663 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
664 setExceptionPointerRegister(ARM::R0);
665 setExceptionSelectorRegister(ARM::R1);
668 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
669 // ARMv6 Thumb1 (except for CPUs that support dmb / dsb) and earlier use
670 // the default expansion.
671 // FIXME: This should be checking for v6k, not just v6.
672 if (Subtarget->hasDataBarrier() ||
673 (Subtarget->hasV6Ops() && !Subtarget->isThumb())) {
674 // membarrier needs custom lowering; the rest are legal and handled
676 setOperationAction(ISD::MEMBARRIER, MVT::Other, Custom);
677 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
678 // Custom lowering for 64-bit ops
679 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i64, Custom);
680 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
681 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i64, Custom);
682 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i64, Custom);
683 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Custom);
684 setOperationAction(ISD::ATOMIC_SWAP, MVT::i64, Custom);
685 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i64, Custom);
686 // Automatically insert fences (dmb ist) around ATOMIC_SWAP etc.
687 setInsertFencesForAtomic(true);
689 // Set them all for expansion, which will force libcalls.
690 setOperationAction(ISD::MEMBARRIER, MVT::Other, Expand);
691 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Expand);
692 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Expand);
693 setOperationAction(ISD::ATOMIC_SWAP, MVT::i32, Expand);
694 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i32, Expand);
695 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i32, Expand);
696 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i32, Expand);
697 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i32, Expand);
698 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i32, Expand);
699 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i32, Expand);
700 setOperationAction(ISD::ATOMIC_LOAD_MIN, MVT::i32, Expand);
701 setOperationAction(ISD::ATOMIC_LOAD_MAX, MVT::i32, Expand);
702 setOperationAction(ISD::ATOMIC_LOAD_UMIN, MVT::i32, Expand);
703 setOperationAction(ISD::ATOMIC_LOAD_UMAX, MVT::i32, Expand);
704 // Mark ATOMIC_LOAD and ATOMIC_STORE custom so we can handle the
705 // Unordered/Monotonic case.
706 setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Custom);
707 setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Custom);
708 // Since the libcalls include locking, fold in the fences
709 setShouldFoldAtomicFences(true);
712 setOperationAction(ISD::PREFETCH, MVT::Other, Custom);
714 // Requires SXTB/SXTH, available on v6 and up in both ARM and Thumb modes.
715 if (!Subtarget->hasV6Ops()) {
716 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
717 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand);
719 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
721 if (!TM.Options.UseSoftFloat && Subtarget->hasVFP2() &&
722 !Subtarget->isThumb1Only()) {
723 // Turn f64->i64 into VMOVRRD, i64 -> f64 to VMOVDRR
724 // iff target supports vfp2.
725 setOperationAction(ISD::BITCAST, MVT::i64, Custom);
726 setOperationAction(ISD::FLT_ROUNDS_, MVT::i32, Custom);
729 // We want to custom lower some of our intrinsics.
730 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
731 if (Subtarget->isTargetDarwin()) {
732 setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
733 setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
734 setLibcallName(RTLIB::UNWIND_RESUME, "_Unwind_SjLj_Resume");
737 setOperationAction(ISD::SETCC, MVT::i32, Expand);
738 setOperationAction(ISD::SETCC, MVT::f32, Expand);
739 setOperationAction(ISD::SETCC, MVT::f64, Expand);
740 setOperationAction(ISD::SELECT, MVT::i32, Custom);
741 setOperationAction(ISD::SELECT, MVT::f32, Custom);
742 setOperationAction(ISD::SELECT, MVT::f64, Custom);
743 setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
744 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
745 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
747 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
748 setOperationAction(ISD::BR_CC, MVT::i32, Custom);
749 setOperationAction(ISD::BR_CC, MVT::f32, Custom);
750 setOperationAction(ISD::BR_CC, MVT::f64, Custom);
751 setOperationAction(ISD::BR_JT, MVT::Other, Custom);
753 // We don't support sin/cos/fmod/copysign/pow
754 setOperationAction(ISD::FSIN, MVT::f64, Expand);
755 setOperationAction(ISD::FSIN, MVT::f32, Expand);
756 setOperationAction(ISD::FCOS, MVT::f32, Expand);
757 setOperationAction(ISD::FCOS, MVT::f64, Expand);
758 setOperationAction(ISD::FREM, MVT::f64, Expand);
759 setOperationAction(ISD::FREM, MVT::f32, Expand);
760 if (!TM.Options.UseSoftFloat && Subtarget->hasVFP2() &&
761 !Subtarget->isThumb1Only()) {
762 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
763 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
765 setOperationAction(ISD::FPOW, MVT::f64, Expand);
766 setOperationAction(ISD::FPOW, MVT::f32, Expand);
768 if (!Subtarget->hasVFP4()) {
769 setOperationAction(ISD::FMA, MVT::f64, Expand);
770 setOperationAction(ISD::FMA, MVT::f32, Expand);
773 // Various VFP goodness
774 if (!TM.Options.UseSoftFloat && !Subtarget->isThumb1Only()) {
775 // int <-> fp are custom expanded into bit_convert + ARMISD ops.
776 if (Subtarget->hasVFP2()) {
777 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
778 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
779 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
780 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
782 // Special handling for half-precision FP.
783 if (!Subtarget->hasFP16()) {
784 setOperationAction(ISD::FP16_TO_FP32, MVT::f32, Expand);
785 setOperationAction(ISD::FP32_TO_FP16, MVT::i32, Expand);
789 // We have target-specific dag combine patterns for the following nodes:
790 // ARMISD::VMOVRRD - No need to call setTargetDAGCombine
791 setTargetDAGCombine(ISD::ADD);
792 setTargetDAGCombine(ISD::SUB);
793 setTargetDAGCombine(ISD::MUL);
795 if (Subtarget->hasV6T2Ops() || Subtarget->hasNEON()) {
796 setTargetDAGCombine(ISD::AND);
797 setTargetDAGCombine(ISD::OR);
798 setTargetDAGCombine(ISD::XOR);
801 if (Subtarget->hasV6Ops())
802 setTargetDAGCombine(ISD::SRL);
804 setStackPointerRegisterToSaveRestore(ARM::SP);
806 if (TM.Options.UseSoftFloat || Subtarget->isThumb1Only() ||
807 !Subtarget->hasVFP2())
808 setSchedulingPreference(Sched::RegPressure);
810 setSchedulingPreference(Sched::Hybrid);
812 //// temporary - rewrite interface to use type
813 maxStoresPerMemcpy = maxStoresPerMemcpyOptSize = 1;
814 maxStoresPerMemset = 16;
815 maxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
817 // On ARM arguments smaller than 4 bytes are extended, so all arguments
818 // are at least 4 bytes aligned.
819 setMinStackArgumentAlignment(4);
821 benefitFromCodePlacementOpt = true;
823 // Prefer likely predicted branches to selects on out-of-order cores.
824 predictableSelectIsExpensive = Subtarget->isCortexA9();
826 setMinFunctionAlignment(Subtarget->isThumb() ? 1 : 2);
829 // FIXME: It might make sense to define the representative register class as the
830 // nearest super-register that has a non-null superset. For example, DPR_VFP2 is
831 // a super-register of SPR, and DPR is a superset if DPR_VFP2. Consequently,
832 // SPR's representative would be DPR_VFP2. This should work well if register
833 // pressure tracking were modified such that a register use would increment the
834 // pressure of the register class's representative and all of it's super
835 // classes' representatives transitively. We have not implemented this because
836 // of the difficulty prior to coalescing of modeling operand register classes
837 // due to the common occurrence of cross class copies and subregister insertions
839 std::pair<const TargetRegisterClass*, uint8_t>
840 ARMTargetLowering::findRepresentativeClass(EVT VT) const{
841 const TargetRegisterClass *RRC = 0;
843 switch (VT.getSimpleVT().SimpleTy) {
845 return TargetLowering::findRepresentativeClass(VT);
846 // Use DPR as representative register class for all floating point
847 // and vector types. Since there are 32 SPR registers and 32 DPR registers so
848 // the cost is 1 for both f32 and f64.
849 case MVT::f32: case MVT::f64: case MVT::v8i8: case MVT::v4i16:
850 case MVT::v2i32: case MVT::v1i64: case MVT::v2f32:
851 RRC = &ARM::DPRRegClass;
852 // When NEON is used for SP, only half of the register file is available
853 // because operations that define both SP and DP results will be constrained
854 // to the VFP2 class (D0-D15). We currently model this constraint prior to
855 // coalescing by double-counting the SP regs. See the FIXME above.
856 if (Subtarget->useNEONForSinglePrecisionFP())
859 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
860 case MVT::v4f32: case MVT::v2f64:
861 RRC = &ARM::DPRRegClass;
865 RRC = &ARM::DPRRegClass;
869 RRC = &ARM::DPRRegClass;
873 return std::make_pair(RRC, Cost);
876 const char *ARMTargetLowering::getTargetNodeName(unsigned Opcode) const {
879 case ARMISD::Wrapper: return "ARMISD::Wrapper";
880 case ARMISD::WrapperDYN: return "ARMISD::WrapperDYN";
881 case ARMISD::WrapperPIC: return "ARMISD::WrapperPIC";
882 case ARMISD::WrapperJT: return "ARMISD::WrapperJT";
883 case ARMISD::CALL: return "ARMISD::CALL";
884 case ARMISD::CALL_PRED: return "ARMISD::CALL_PRED";
885 case ARMISD::CALL_NOLINK: return "ARMISD::CALL_NOLINK";
886 case ARMISD::tCALL: return "ARMISD::tCALL";
887 case ARMISD::BRCOND: return "ARMISD::BRCOND";
888 case ARMISD::BR_JT: return "ARMISD::BR_JT";
889 case ARMISD::BR2_JT: return "ARMISD::BR2_JT";
890 case ARMISD::RET_FLAG: return "ARMISD::RET_FLAG";
891 case ARMISD::PIC_ADD: return "ARMISD::PIC_ADD";
892 case ARMISD::CMP: return "ARMISD::CMP";
893 case ARMISD::CMN: return "ARMISD::CMN";
894 case ARMISD::CMPZ: return "ARMISD::CMPZ";
895 case ARMISD::CMPFP: return "ARMISD::CMPFP";
896 case ARMISD::CMPFPw0: return "ARMISD::CMPFPw0";
897 case ARMISD::BCC_i64: return "ARMISD::BCC_i64";
898 case ARMISD::FMSTAT: return "ARMISD::FMSTAT";
900 case ARMISD::CMOV: return "ARMISD::CMOV";
902 case ARMISD::RBIT: return "ARMISD::RBIT";
904 case ARMISD::FTOSI: return "ARMISD::FTOSI";
905 case ARMISD::FTOUI: return "ARMISD::FTOUI";
906 case ARMISD::SITOF: return "ARMISD::SITOF";
907 case ARMISD::UITOF: return "ARMISD::UITOF";
909 case ARMISD::SRL_FLAG: return "ARMISD::SRL_FLAG";
910 case ARMISD::SRA_FLAG: return "ARMISD::SRA_FLAG";
911 case ARMISD::RRX: return "ARMISD::RRX";
913 case ARMISD::ADDC: return "ARMISD::ADDC";
914 case ARMISD::ADDE: return "ARMISD::ADDE";
915 case ARMISD::SUBC: return "ARMISD::SUBC";
916 case ARMISD::SUBE: return "ARMISD::SUBE";
918 case ARMISD::VMOVRRD: return "ARMISD::VMOVRRD";
919 case ARMISD::VMOVDRR: return "ARMISD::VMOVDRR";
921 case ARMISD::EH_SJLJ_SETJMP: return "ARMISD::EH_SJLJ_SETJMP";
922 case ARMISD::EH_SJLJ_LONGJMP:return "ARMISD::EH_SJLJ_LONGJMP";
924 case ARMISD::TC_RETURN: return "ARMISD::TC_RETURN";
926 case ARMISD::THREAD_POINTER:return "ARMISD::THREAD_POINTER";
928 case ARMISD::DYN_ALLOC: return "ARMISD::DYN_ALLOC";
930 case ARMISD::MEMBARRIER: return "ARMISD::MEMBARRIER";
931 case ARMISD::MEMBARRIER_MCR: return "ARMISD::MEMBARRIER_MCR";
933 case ARMISD::PRELOAD: return "ARMISD::PRELOAD";
935 case ARMISD::VCEQ: return "ARMISD::VCEQ";
936 case ARMISD::VCEQZ: return "ARMISD::VCEQZ";
937 case ARMISD::VCGE: return "ARMISD::VCGE";
938 case ARMISD::VCGEZ: return "ARMISD::VCGEZ";
939 case ARMISD::VCLEZ: return "ARMISD::VCLEZ";
940 case ARMISD::VCGEU: return "ARMISD::VCGEU";
941 case ARMISD::VCGT: return "ARMISD::VCGT";
942 case ARMISD::VCGTZ: return "ARMISD::VCGTZ";
943 case ARMISD::VCLTZ: return "ARMISD::VCLTZ";
944 case ARMISD::VCGTU: return "ARMISD::VCGTU";
945 case ARMISD::VTST: return "ARMISD::VTST";
947 case ARMISD::VSHL: return "ARMISD::VSHL";
948 case ARMISD::VSHRs: return "ARMISD::VSHRs";
949 case ARMISD::VSHRu: return "ARMISD::VSHRu";
950 case ARMISD::VSHLLs: return "ARMISD::VSHLLs";
951 case ARMISD::VSHLLu: return "ARMISD::VSHLLu";
952 case ARMISD::VSHLLi: return "ARMISD::VSHLLi";
953 case ARMISD::VSHRN: return "ARMISD::VSHRN";
954 case ARMISD::VRSHRs: return "ARMISD::VRSHRs";
955 case ARMISD::VRSHRu: return "ARMISD::VRSHRu";
956 case ARMISD::VRSHRN: return "ARMISD::VRSHRN";
957 case ARMISD::VQSHLs: return "ARMISD::VQSHLs";
958 case ARMISD::VQSHLu: return "ARMISD::VQSHLu";
959 case ARMISD::VQSHLsu: return "ARMISD::VQSHLsu";
960 case ARMISD::VQSHRNs: return "ARMISD::VQSHRNs";
961 case ARMISD::VQSHRNu: return "ARMISD::VQSHRNu";
962 case ARMISD::VQSHRNsu: return "ARMISD::VQSHRNsu";
963 case ARMISD::VQRSHRNs: return "ARMISD::VQRSHRNs";
964 case ARMISD::VQRSHRNu: return "ARMISD::VQRSHRNu";
965 case ARMISD::VQRSHRNsu: return "ARMISD::VQRSHRNsu";
966 case ARMISD::VGETLANEu: return "ARMISD::VGETLANEu";
967 case ARMISD::VGETLANEs: return "ARMISD::VGETLANEs";
968 case ARMISD::VMOVIMM: return "ARMISD::VMOVIMM";
969 case ARMISD::VMVNIMM: return "ARMISD::VMVNIMM";
970 case ARMISD::VMOVFPIMM: return "ARMISD::VMOVFPIMM";
971 case ARMISD::VDUP: return "ARMISD::VDUP";
972 case ARMISD::VDUPLANE: return "ARMISD::VDUPLANE";
973 case ARMISD::VEXT: return "ARMISD::VEXT";
974 case ARMISD::VREV64: return "ARMISD::VREV64";
975 case ARMISD::VREV32: return "ARMISD::VREV32";
976 case ARMISD::VREV16: return "ARMISD::VREV16";
977 case ARMISD::VZIP: return "ARMISD::VZIP";
978 case ARMISD::VUZP: return "ARMISD::VUZP";
979 case ARMISD::VTRN: return "ARMISD::VTRN";
980 case ARMISD::VTBL1: return "ARMISD::VTBL1";
981 case ARMISD::VTBL2: return "ARMISD::VTBL2";
982 case ARMISD::VMULLs: return "ARMISD::VMULLs";
983 case ARMISD::VMULLu: return "ARMISD::VMULLu";
984 case ARMISD::BUILD_VECTOR: return "ARMISD::BUILD_VECTOR";
985 case ARMISD::FMAX: return "ARMISD::FMAX";
986 case ARMISD::FMIN: return "ARMISD::FMIN";
987 case ARMISD::BFI: return "ARMISD::BFI";
988 case ARMISD::VORRIMM: return "ARMISD::VORRIMM";
989 case ARMISD::VBICIMM: return "ARMISD::VBICIMM";
990 case ARMISD::VBSL: return "ARMISD::VBSL";
991 case ARMISD::VLD2DUP: return "ARMISD::VLD2DUP";
992 case ARMISD::VLD3DUP: return "ARMISD::VLD3DUP";
993 case ARMISD::VLD4DUP: return "ARMISD::VLD4DUP";
994 case ARMISD::VLD1_UPD: return "ARMISD::VLD1_UPD";
995 case ARMISD::VLD2_UPD: return "ARMISD::VLD2_UPD";
996 case ARMISD::VLD3_UPD: return "ARMISD::VLD3_UPD";
997 case ARMISD::VLD4_UPD: return "ARMISD::VLD4_UPD";
998 case ARMISD::VLD2LN_UPD: return "ARMISD::VLD2LN_UPD";
999 case ARMISD::VLD3LN_UPD: return "ARMISD::VLD3LN_UPD";
1000 case ARMISD::VLD4LN_UPD: return "ARMISD::VLD4LN_UPD";
1001 case ARMISD::VLD2DUP_UPD: return "ARMISD::VLD2DUP_UPD";
1002 case ARMISD::VLD3DUP_UPD: return "ARMISD::VLD3DUP_UPD";
1003 case ARMISD::VLD4DUP_UPD: return "ARMISD::VLD4DUP_UPD";
1004 case ARMISD::VST1_UPD: return "ARMISD::VST1_UPD";
1005 case ARMISD::VST2_UPD: return "ARMISD::VST2_UPD";
1006 case ARMISD::VST3_UPD: return "ARMISD::VST3_UPD";
1007 case ARMISD::VST4_UPD: return "ARMISD::VST4_UPD";
1008 case ARMISD::VST2LN_UPD: return "ARMISD::VST2LN_UPD";
1009 case ARMISD::VST3LN_UPD: return "ARMISD::VST3LN_UPD";
1010 case ARMISD::VST4LN_UPD: return "ARMISD::VST4LN_UPD";
1014 EVT ARMTargetLowering::getSetCCResultType(EVT VT) const {
1015 if (!VT.isVector()) return getPointerTy();
1016 return VT.changeVectorElementTypeToInteger();
1019 /// getRegClassFor - Return the register class that should be used for the
1020 /// specified value type.
1021 const TargetRegisterClass *ARMTargetLowering::getRegClassFor(EVT VT) const {
1022 // Map v4i64 to QQ registers but do not make the type legal. Similarly map
1023 // v8i64 to QQQQ registers. v4i64 and v8i64 are only used for REG_SEQUENCE to
1024 // load / store 4 to 8 consecutive D registers.
1025 if (Subtarget->hasNEON()) {
1026 if (VT == MVT::v4i64)
1027 return &ARM::QQPRRegClass;
1028 if (VT == MVT::v8i64)
1029 return &ARM::QQQQPRRegClass;
1031 return TargetLowering::getRegClassFor(VT);
1034 // Create a fast isel object.
1036 ARMTargetLowering::createFastISel(FunctionLoweringInfo &funcInfo,
1037 const TargetLibraryInfo *libInfo) const {
1038 return ARM::createFastISel(funcInfo, libInfo);
1041 /// getMaximalGlobalOffset - Returns the maximal possible offset which can
1042 /// be used for loads / stores from the global.
1043 unsigned ARMTargetLowering::getMaximalGlobalOffset() const {
1044 return (Subtarget->isThumb1Only() ? 127 : 4095);
1047 Sched::Preference ARMTargetLowering::getSchedulingPreference(SDNode *N) const {
1048 unsigned NumVals = N->getNumValues();
1050 return Sched::RegPressure;
1052 for (unsigned i = 0; i != NumVals; ++i) {
1053 EVT VT = N->getValueType(i);
1054 if (VT == MVT::Glue || VT == MVT::Other)
1056 if (VT.isFloatingPoint() || VT.isVector())
1060 if (!N->isMachineOpcode())
1061 return Sched::RegPressure;
1063 // Load are scheduled for latency even if there instruction itinerary
1064 // is not available.
1065 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1066 const MCInstrDesc &MCID = TII->get(N->getMachineOpcode());
1068 if (MCID.getNumDefs() == 0)
1069 return Sched::RegPressure;
1070 if (!Itins->isEmpty() &&
1071 Itins->getOperandCycle(MCID.getSchedClass(), 0) > 2)
1074 return Sched::RegPressure;
1077 //===----------------------------------------------------------------------===//
1079 //===----------------------------------------------------------------------===//
1081 /// IntCCToARMCC - Convert a DAG integer condition code to an ARM CC
1082 static ARMCC::CondCodes IntCCToARMCC(ISD::CondCode CC) {
1084 default: llvm_unreachable("Unknown condition code!");
1085 case ISD::SETNE: return ARMCC::NE;
1086 case ISD::SETEQ: return ARMCC::EQ;
1087 case ISD::SETGT: return ARMCC::GT;
1088 case ISD::SETGE: return ARMCC::GE;
1089 case ISD::SETLT: return ARMCC::LT;
1090 case ISD::SETLE: return ARMCC::LE;
1091 case ISD::SETUGT: return ARMCC::HI;
1092 case ISD::SETUGE: return ARMCC::HS;
1093 case ISD::SETULT: return ARMCC::LO;
1094 case ISD::SETULE: return ARMCC::LS;
1098 /// FPCCToARMCC - Convert a DAG fp condition code to an ARM CC.
1099 static void FPCCToARMCC(ISD::CondCode CC, ARMCC::CondCodes &CondCode,
1100 ARMCC::CondCodes &CondCode2) {
1101 CondCode2 = ARMCC::AL;
1103 default: llvm_unreachable("Unknown FP condition!");
1105 case ISD::SETOEQ: CondCode = ARMCC::EQ; break;
1107 case ISD::SETOGT: CondCode = ARMCC::GT; break;
1109 case ISD::SETOGE: CondCode = ARMCC::GE; break;
1110 case ISD::SETOLT: CondCode = ARMCC::MI; break;
1111 case ISD::SETOLE: CondCode = ARMCC::LS; break;
1112 case ISD::SETONE: CondCode = ARMCC::MI; CondCode2 = ARMCC::GT; break;
1113 case ISD::SETO: CondCode = ARMCC::VC; break;
1114 case ISD::SETUO: CondCode = ARMCC::VS; break;
1115 case ISD::SETUEQ: CondCode = ARMCC::EQ; CondCode2 = ARMCC::VS; break;
1116 case ISD::SETUGT: CondCode = ARMCC::HI; break;
1117 case ISD::SETUGE: CondCode = ARMCC::PL; break;
1119 case ISD::SETULT: CondCode = ARMCC::LT; break;
1121 case ISD::SETULE: CondCode = ARMCC::LE; break;
1123 case ISD::SETUNE: CondCode = ARMCC::NE; break;
1127 //===----------------------------------------------------------------------===//
1128 // Calling Convention Implementation
1129 //===----------------------------------------------------------------------===//
1131 #include "ARMGenCallingConv.inc"
1133 /// CCAssignFnForNode - Selects the correct CCAssignFn for a the
1134 /// given CallingConvention value.
1135 CCAssignFn *ARMTargetLowering::CCAssignFnForNode(CallingConv::ID CC,
1137 bool isVarArg) const {
1140 llvm_unreachable("Unsupported calling convention");
1141 case CallingConv::Fast:
1142 if (Subtarget->hasVFP2() && !isVarArg) {
1143 if (!Subtarget->isAAPCS_ABI())
1144 return (Return ? RetFastCC_ARM_APCS : FastCC_ARM_APCS);
1145 // For AAPCS ABI targets, just use VFP variant of the calling convention.
1146 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1149 case CallingConv::C: {
1150 // Use target triple & subtarget features to do actual dispatch.
1151 if (!Subtarget->isAAPCS_ABI())
1152 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
1153 else if (Subtarget->hasVFP2() &&
1154 getTargetMachine().Options.FloatABIType == FloatABI::Hard &&
1156 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1157 return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
1159 case CallingConv::ARM_AAPCS_VFP:
1161 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1163 case CallingConv::ARM_AAPCS:
1164 return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
1165 case CallingConv::ARM_APCS:
1166 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
1167 case CallingConv::GHC:
1168 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS_GHC);
1172 /// LowerCallResult - Lower the result values of a call into the
1173 /// appropriate copies out of appropriate physical registers.
1175 ARMTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1176 CallingConv::ID CallConv, bool isVarArg,
1177 const SmallVectorImpl<ISD::InputArg> &Ins,
1178 DebugLoc dl, SelectionDAG &DAG,
1179 SmallVectorImpl<SDValue> &InVals) const {
1181 // Assign locations to each value returned by this call.
1182 SmallVector<CCValAssign, 16> RVLocs;
1183 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1184 getTargetMachine(), RVLocs, *DAG.getContext(), Call);
1185 CCInfo.AnalyzeCallResult(Ins,
1186 CCAssignFnForNode(CallConv, /* Return*/ true,
1189 // Copy all of the result registers out of their specified physreg.
1190 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1191 CCValAssign VA = RVLocs[i];
1194 if (VA.needsCustom()) {
1195 // Handle f64 or half of a v2f64.
1196 SDValue Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1198 Chain = Lo.getValue(1);
1199 InFlag = Lo.getValue(2);
1200 VA = RVLocs[++i]; // skip ahead to next loc
1201 SDValue Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1203 Chain = Hi.getValue(1);
1204 InFlag = Hi.getValue(2);
1205 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1207 if (VA.getLocVT() == MVT::v2f64) {
1208 SDValue Vec = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
1209 Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1210 DAG.getConstant(0, MVT::i32));
1212 VA = RVLocs[++i]; // skip ahead to next loc
1213 Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1214 Chain = Lo.getValue(1);
1215 InFlag = Lo.getValue(2);
1216 VA = RVLocs[++i]; // skip ahead to next loc
1217 Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1218 Chain = Hi.getValue(1);
1219 InFlag = Hi.getValue(2);
1220 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1221 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1222 DAG.getConstant(1, MVT::i32));
1225 Val = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), VA.getLocVT(),
1227 Chain = Val.getValue(1);
1228 InFlag = Val.getValue(2);
1231 switch (VA.getLocInfo()) {
1232 default: llvm_unreachable("Unknown loc info!");
1233 case CCValAssign::Full: break;
1234 case CCValAssign::BCvt:
1235 Val = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), Val);
1239 InVals.push_back(Val);
1245 /// LowerMemOpCallTo - Store the argument to the stack.
1247 ARMTargetLowering::LowerMemOpCallTo(SDValue Chain,
1248 SDValue StackPtr, SDValue Arg,
1249 DebugLoc dl, SelectionDAG &DAG,
1250 const CCValAssign &VA,
1251 ISD::ArgFlagsTy Flags) const {
1252 unsigned LocMemOffset = VA.getLocMemOffset();
1253 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
1254 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
1255 return DAG.getStore(Chain, dl, Arg, PtrOff,
1256 MachinePointerInfo::getStack(LocMemOffset),
1260 void ARMTargetLowering::PassF64ArgInRegs(DebugLoc dl, SelectionDAG &DAG,
1261 SDValue Chain, SDValue &Arg,
1262 RegsToPassVector &RegsToPass,
1263 CCValAssign &VA, CCValAssign &NextVA,
1265 SmallVector<SDValue, 8> &MemOpChains,
1266 ISD::ArgFlagsTy Flags) const {
1268 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
1269 DAG.getVTList(MVT::i32, MVT::i32), Arg);
1270 RegsToPass.push_back(std::make_pair(VA.getLocReg(), fmrrd));
1272 if (NextVA.isRegLoc())
1273 RegsToPass.push_back(std::make_pair(NextVA.getLocReg(), fmrrd.getValue(1)));
1275 assert(NextVA.isMemLoc());
1276 if (StackPtr.getNode() == 0)
1277 StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
1279 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, fmrrd.getValue(1),
1285 /// LowerCall - Lowering a call into a callseq_start <-
1286 /// ARMISD:CALL <- callseq_end chain. Also add input and output parameter
1289 ARMTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
1290 SmallVectorImpl<SDValue> &InVals) const {
1291 SelectionDAG &DAG = CLI.DAG;
1292 DebugLoc &dl = CLI.DL;
1293 SmallVector<ISD::OutputArg, 32> &Outs = CLI.Outs;
1294 SmallVector<SDValue, 32> &OutVals = CLI.OutVals;
1295 SmallVector<ISD::InputArg, 32> &Ins = CLI.Ins;
1296 SDValue Chain = CLI.Chain;
1297 SDValue Callee = CLI.Callee;
1298 bool &isTailCall = CLI.IsTailCall;
1299 CallingConv::ID CallConv = CLI.CallConv;
1300 bool doesNotRet = CLI.DoesNotReturn;
1301 bool isVarArg = CLI.IsVarArg;
1303 MachineFunction &MF = DAG.getMachineFunction();
1304 bool IsStructRet = (Outs.empty()) ? false : Outs[0].Flags.isSRet();
1305 bool IsSibCall = false;
1306 // Disable tail calls if they're not supported.
1307 if (!EnableARMTailCalls && !Subtarget->supportsTailCall())
1310 // Check if it's really possible to do a tail call.
1311 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
1312 isVarArg, IsStructRet, MF.getFunction()->hasStructRetAttr(),
1313 Outs, OutVals, Ins, DAG);
1314 // We don't support GuaranteedTailCallOpt for ARM, only automatically
1315 // detected sibcalls.
1322 // Analyze operands of the call, assigning locations to each operand.
1323 SmallVector<CCValAssign, 16> ArgLocs;
1324 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1325 getTargetMachine(), ArgLocs, *DAG.getContext(), Call);
1326 CCInfo.AnalyzeCallOperands(Outs,
1327 CCAssignFnForNode(CallConv, /* Return*/ false,
1330 // Get a count of how many bytes are to be pushed on the stack.
1331 unsigned NumBytes = CCInfo.getNextStackOffset();
1333 // For tail calls, memory operands are available in our caller's stack.
1337 // Adjust the stack pointer for the new arguments...
1338 // These operations are automatically eliminated by the prolog/epilog pass
1340 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
1342 SDValue StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
1344 RegsToPassVector RegsToPass;
1345 SmallVector<SDValue, 8> MemOpChains;
1347 // Walk the register/memloc assignments, inserting copies/loads. In the case
1348 // of tail call optimization, arguments are handled later.
1349 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
1351 ++i, ++realArgIdx) {
1352 CCValAssign &VA = ArgLocs[i];
1353 SDValue Arg = OutVals[realArgIdx];
1354 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
1355 bool isByVal = Flags.isByVal();
1357 // Promote the value if needed.
1358 switch (VA.getLocInfo()) {
1359 default: llvm_unreachable("Unknown loc info!");
1360 case CCValAssign::Full: break;
1361 case CCValAssign::SExt:
1362 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
1364 case CCValAssign::ZExt:
1365 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
1367 case CCValAssign::AExt:
1368 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
1370 case CCValAssign::BCvt:
1371 Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg);
1375 // f64 and v2f64 might be passed in i32 pairs and must be split into pieces
1376 if (VA.needsCustom()) {
1377 if (VA.getLocVT() == MVT::v2f64) {
1378 SDValue Op0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1379 DAG.getConstant(0, MVT::i32));
1380 SDValue Op1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1381 DAG.getConstant(1, MVT::i32));
1383 PassF64ArgInRegs(dl, DAG, Chain, Op0, RegsToPass,
1384 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1386 VA = ArgLocs[++i]; // skip ahead to next loc
1387 if (VA.isRegLoc()) {
1388 PassF64ArgInRegs(dl, DAG, Chain, Op1, RegsToPass,
1389 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1391 assert(VA.isMemLoc());
1393 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Op1,
1394 dl, DAG, VA, Flags));
1397 PassF64ArgInRegs(dl, DAG, Chain, Arg, RegsToPass, VA, ArgLocs[++i],
1398 StackPtr, MemOpChains, Flags);
1400 } else if (VA.isRegLoc()) {
1401 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
1402 } else if (isByVal) {
1403 assert(VA.isMemLoc());
1404 unsigned offset = 0;
1406 // True if this byval aggregate will be split between registers
1408 if (CCInfo.isFirstByValRegValid()) {
1409 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1411 for (i = 0, j = CCInfo.getFirstByValReg(); j < ARM::R4; i++, j++) {
1412 SDValue Const = DAG.getConstant(4*i, MVT::i32);
1413 SDValue AddArg = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, Const);
1414 SDValue Load = DAG.getLoad(PtrVT, dl, Chain, AddArg,
1415 MachinePointerInfo(),
1416 false, false, false, 0);
1417 MemOpChains.push_back(Load.getValue(1));
1418 RegsToPass.push_back(std::make_pair(j, Load));
1420 offset = ARM::R4 - CCInfo.getFirstByValReg();
1421 CCInfo.clearFirstByValReg();
1424 if (Flags.getByValSize() - 4*offset > 0) {
1425 unsigned LocMemOffset = VA.getLocMemOffset();
1426 SDValue StkPtrOff = DAG.getIntPtrConstant(LocMemOffset);
1427 SDValue Dst = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr,
1429 SDValue SrcOffset = DAG.getIntPtrConstant(4*offset);
1430 SDValue Src = DAG.getNode(ISD::ADD, dl, getPointerTy(), Arg, SrcOffset);
1431 SDValue SizeNode = DAG.getConstant(Flags.getByValSize() - 4*offset,
1433 SDValue AlignNode = DAG.getConstant(Flags.getByValAlign(), MVT::i32);
1435 SDVTList VTs = DAG.getVTList(MVT::Other, MVT::Glue);
1436 SDValue Ops[] = { Chain, Dst, Src, SizeNode, AlignNode};
1437 MemOpChains.push_back(DAG.getNode(ARMISD::COPY_STRUCT_BYVAL, dl, VTs,
1438 Ops, array_lengthof(Ops)));
1440 } else if (!IsSibCall) {
1441 assert(VA.isMemLoc());
1443 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
1444 dl, DAG, VA, Flags));
1448 if (!MemOpChains.empty())
1449 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1450 &MemOpChains[0], MemOpChains.size());
1452 // Build a sequence of copy-to-reg nodes chained together with token chain
1453 // and flag operands which copy the outgoing args into the appropriate regs.
1455 // Tail call byval lowering might overwrite argument registers so in case of
1456 // tail call optimization the copies to registers are lowered later.
1458 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1459 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1460 RegsToPass[i].second, InFlag);
1461 InFlag = Chain.getValue(1);
1464 // For tail calls lower the arguments to the 'real' stack slot.
1466 // Force all the incoming stack arguments to be loaded from the stack
1467 // before any new outgoing arguments are stored to the stack, because the
1468 // outgoing stack slots may alias the incoming argument stack slots, and
1469 // the alias isn't otherwise explicit. This is slightly more conservative
1470 // than necessary, because it means that each store effectively depends
1471 // on every argument instead of just those arguments it would clobber.
1473 // Do not flag preceding copytoreg stuff together with the following stuff.
1475 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1476 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1477 RegsToPass[i].second, InFlag);
1478 InFlag = Chain.getValue(1);
1483 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
1484 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
1485 // node so that legalize doesn't hack it.
1486 bool isDirect = false;
1487 bool isARMFunc = false;
1488 bool isLocalARMFunc = false;
1489 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1491 if (EnableARMLongCalls) {
1492 assert (getTargetMachine().getRelocationModel() == Reloc::Static
1493 && "long-calls with non-static relocation model!");
1494 // Handle a global address or an external symbol. If it's not one of
1495 // those, the target's already in a register, so we don't need to do
1497 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1498 const GlobalValue *GV = G->getGlobal();
1499 // Create a constant pool entry for the callee address
1500 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1501 ARMConstantPoolValue *CPV =
1502 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue, 0);
1504 // Get the address of the callee into a register
1505 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1506 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1507 Callee = DAG.getLoad(getPointerTy(), dl,
1508 DAG.getEntryNode(), CPAddr,
1509 MachinePointerInfo::getConstantPool(),
1510 false, false, false, 0);
1511 } else if (ExternalSymbolSDNode *S=dyn_cast<ExternalSymbolSDNode>(Callee)) {
1512 const char *Sym = S->getSymbol();
1514 // Create a constant pool entry for the callee address
1515 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1516 ARMConstantPoolValue *CPV =
1517 ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym,
1518 ARMPCLabelIndex, 0);
1519 // Get the address of the callee into a register
1520 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1521 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1522 Callee = DAG.getLoad(getPointerTy(), dl,
1523 DAG.getEntryNode(), CPAddr,
1524 MachinePointerInfo::getConstantPool(),
1525 false, false, false, 0);
1527 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1528 const GlobalValue *GV = G->getGlobal();
1530 bool isExt = GV->isDeclaration() || GV->isWeakForLinker();
1531 bool isStub = (isExt && Subtarget->isTargetDarwin()) &&
1532 getTargetMachine().getRelocationModel() != Reloc::Static;
1533 isARMFunc = !Subtarget->isThumb() || isStub;
1534 // ARM call to a local ARM function is predicable.
1535 isLocalARMFunc = !Subtarget->isThumb() && (!isExt || !ARMInterworking);
1536 // tBX takes a register source operand.
1537 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1538 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1539 ARMConstantPoolValue *CPV =
1540 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue, 4);
1541 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1542 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1543 Callee = DAG.getLoad(getPointerTy(), dl,
1544 DAG.getEntryNode(), CPAddr,
1545 MachinePointerInfo::getConstantPool(),
1546 false, false, false, 0);
1547 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1548 Callee = DAG.getNode(ARMISD::PIC_ADD, dl,
1549 getPointerTy(), Callee, PICLabel);
1551 // On ELF targets for PIC code, direct calls should go through the PLT
1552 unsigned OpFlags = 0;
1553 if (Subtarget->isTargetELF() &&
1554 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1555 OpFlags = ARMII::MO_PLT;
1556 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
1558 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
1560 bool isStub = Subtarget->isTargetDarwin() &&
1561 getTargetMachine().getRelocationModel() != Reloc::Static;
1562 isARMFunc = !Subtarget->isThumb() || isStub;
1563 // tBX takes a register source operand.
1564 const char *Sym = S->getSymbol();
1565 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1566 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1567 ARMConstantPoolValue *CPV =
1568 ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym,
1569 ARMPCLabelIndex, 4);
1570 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1571 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1572 Callee = DAG.getLoad(getPointerTy(), dl,
1573 DAG.getEntryNode(), CPAddr,
1574 MachinePointerInfo::getConstantPool(),
1575 false, false, false, 0);
1576 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1577 Callee = DAG.getNode(ARMISD::PIC_ADD, dl,
1578 getPointerTy(), Callee, PICLabel);
1580 unsigned OpFlags = 0;
1581 // On ELF targets for PIC code, direct calls should go through the PLT
1582 if (Subtarget->isTargetELF() &&
1583 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1584 OpFlags = ARMII::MO_PLT;
1585 Callee = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlags);
1589 // FIXME: handle tail calls differently.
1591 if (Subtarget->isThumb()) {
1592 if ((!isDirect || isARMFunc) && !Subtarget->hasV5TOps())
1593 CallOpc = ARMISD::CALL_NOLINK;
1594 else if (doesNotRet && isDirect && !isARMFunc &&
1595 Subtarget->hasRAS() && !Subtarget->isThumb1Only())
1596 // "mov lr, pc; b _foo" to avoid confusing the RSP
1597 CallOpc = ARMISD::CALL_NOLINK;
1599 CallOpc = isARMFunc ? ARMISD::CALL : ARMISD::tCALL;
1601 if (!isDirect && !Subtarget->hasV5TOps()) {
1602 CallOpc = ARMISD::CALL_NOLINK;
1603 } else if (doesNotRet && isDirect && Subtarget->hasRAS())
1604 // "mov lr, pc; b _foo" to avoid confusing the RSP
1605 CallOpc = ARMISD::CALL_NOLINK;
1607 CallOpc = isLocalARMFunc ? ARMISD::CALL_PRED : ARMISD::CALL;
1610 std::vector<SDValue> Ops;
1611 Ops.push_back(Chain);
1612 Ops.push_back(Callee);
1614 // Add argument registers to the end of the list so that they are known live
1616 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
1617 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
1618 RegsToPass[i].second.getValueType()));
1620 // Add a register mask operand representing the call-preserved registers.
1621 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
1622 const uint32_t *Mask = TRI->getCallPreservedMask(CallConv);
1623 assert(Mask && "Missing call preserved mask for calling convention");
1624 Ops.push_back(DAG.getRegisterMask(Mask));
1626 if (InFlag.getNode())
1627 Ops.push_back(InFlag);
1629 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
1631 return DAG.getNode(ARMISD::TC_RETURN, dl, NodeTys, &Ops[0], Ops.size());
1633 // Returns a chain and a flag for retval copy to use.
1634 Chain = DAG.getNode(CallOpc, dl, NodeTys, &Ops[0], Ops.size());
1635 InFlag = Chain.getValue(1);
1637 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
1638 DAG.getIntPtrConstant(0, true), InFlag);
1640 InFlag = Chain.getValue(1);
1642 // Handle result values, copying them out of physregs into vregs that we
1644 return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins,
1648 /// HandleByVal - Every parameter *after* a byval parameter is passed
1649 /// on the stack. Remember the next parameter register to allocate,
1650 /// and then confiscate the rest of the parameter registers to insure
1653 ARMTargetLowering::HandleByVal(CCState *State, unsigned &size) const {
1654 unsigned reg = State->AllocateReg(GPRArgRegs, 4);
1655 assert((State->getCallOrPrologue() == Prologue ||
1656 State->getCallOrPrologue() == Call) &&
1657 "unhandled ParmContext");
1658 if ((!State->isFirstByValRegValid()) &&
1659 (ARM::R0 <= reg) && (reg <= ARM::R3)) {
1660 State->setFirstByValReg(reg);
1661 // At a call site, a byval parameter that is split between
1662 // registers and memory needs its size truncated here. In a
1663 // function prologue, such byval parameters are reassembled in
1664 // memory, and are not truncated.
1665 if (State->getCallOrPrologue() == Call) {
1666 unsigned excess = 4 * (ARM::R4 - reg);
1667 assert(size >= excess && "expected larger existing stack allocation");
1671 // Confiscate any remaining parameter registers to preclude their
1672 // assignment to subsequent parameters.
1673 while (State->AllocateReg(GPRArgRegs, 4))
1677 /// MatchingStackOffset - Return true if the given stack call argument is
1678 /// already available in the same position (relatively) of the caller's
1679 /// incoming argument stack.
1681 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
1682 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
1683 const TargetInstrInfo *TII) {
1684 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
1686 if (Arg.getOpcode() == ISD::CopyFromReg) {
1687 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
1688 if (!TargetRegisterInfo::isVirtualRegister(VR))
1690 MachineInstr *Def = MRI->getVRegDef(VR);
1693 if (!Flags.isByVal()) {
1694 if (!TII->isLoadFromStackSlot(Def, FI))
1699 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
1700 if (Flags.isByVal())
1701 // ByVal argument is passed in as a pointer but it's now being
1702 // dereferenced. e.g.
1703 // define @foo(%struct.X* %A) {
1704 // tail call @bar(%struct.X* byval %A)
1707 SDValue Ptr = Ld->getBasePtr();
1708 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
1711 FI = FINode->getIndex();
1715 assert(FI != INT_MAX);
1716 if (!MFI->isFixedObjectIndex(FI))
1718 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
1721 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
1722 /// for tail call optimization. Targets which want to do tail call
1723 /// optimization should implement this function.
1725 ARMTargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
1726 CallingConv::ID CalleeCC,
1728 bool isCalleeStructRet,
1729 bool isCallerStructRet,
1730 const SmallVectorImpl<ISD::OutputArg> &Outs,
1731 const SmallVectorImpl<SDValue> &OutVals,
1732 const SmallVectorImpl<ISD::InputArg> &Ins,
1733 SelectionDAG& DAG) const {
1734 const Function *CallerF = DAG.getMachineFunction().getFunction();
1735 CallingConv::ID CallerCC = CallerF->getCallingConv();
1736 bool CCMatch = CallerCC == CalleeCC;
1738 // Look for obvious safe cases to perform tail call optimization that do not
1739 // require ABI changes. This is what gcc calls sibcall.
1741 // Do not sibcall optimize vararg calls unless the call site is not passing
1743 if (isVarArg && !Outs.empty())
1746 // Also avoid sibcall optimization if either caller or callee uses struct
1747 // return semantics.
1748 if (isCalleeStructRet || isCallerStructRet)
1751 // FIXME: Completely disable sibcall for Thumb1 since Thumb1RegisterInfo::
1752 // emitEpilogue is not ready for them. Thumb tail calls also use t2B, as
1753 // the Thumb1 16-bit unconditional branch doesn't have sufficient relocation
1754 // support in the assembler and linker to be used. This would need to be
1755 // fixed to fully support tail calls in Thumb1.
1757 // Doing this is tricky, since the LDM/POP instruction on Thumb doesn't take
1758 // LR. This means if we need to reload LR, it takes an extra instructions,
1759 // which outweighs the value of the tail call; but here we don't know yet
1760 // whether LR is going to be used. Probably the right approach is to
1761 // generate the tail call here and turn it back into CALL/RET in
1762 // emitEpilogue if LR is used.
1764 // Thumb1 PIC calls to external symbols use BX, so they can be tail calls,
1765 // but we need to make sure there are enough registers; the only valid
1766 // registers are the 4 used for parameters. We don't currently do this
1768 if (Subtarget->isThumb1Only())
1771 // If the calling conventions do not match, then we'd better make sure the
1772 // results are returned in the same way as what the caller expects.
1774 SmallVector<CCValAssign, 16> RVLocs1;
1775 ARMCCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(),
1776 getTargetMachine(), RVLocs1, *DAG.getContext(), Call);
1777 CCInfo1.AnalyzeCallResult(Ins, CCAssignFnForNode(CalleeCC, true, isVarArg));
1779 SmallVector<CCValAssign, 16> RVLocs2;
1780 ARMCCState CCInfo2(CallerCC, false, DAG.getMachineFunction(),
1781 getTargetMachine(), RVLocs2, *DAG.getContext(), Call);
1782 CCInfo2.AnalyzeCallResult(Ins, CCAssignFnForNode(CallerCC, true, isVarArg));
1784 if (RVLocs1.size() != RVLocs2.size())
1786 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
1787 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
1789 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
1791 if (RVLocs1[i].isRegLoc()) {
1792 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
1795 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
1801 // If the callee takes no arguments then go on to check the results of the
1803 if (!Outs.empty()) {
1804 // Check if stack adjustment is needed. For now, do not do this if any
1805 // argument is passed on the stack.
1806 SmallVector<CCValAssign, 16> ArgLocs;
1807 ARMCCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
1808 getTargetMachine(), ArgLocs, *DAG.getContext(), Call);
1809 CCInfo.AnalyzeCallOperands(Outs,
1810 CCAssignFnForNode(CalleeCC, false, isVarArg));
1811 if (CCInfo.getNextStackOffset()) {
1812 MachineFunction &MF = DAG.getMachineFunction();
1814 // Check if the arguments are already laid out in the right way as
1815 // the caller's fixed stack objects.
1816 MachineFrameInfo *MFI = MF.getFrameInfo();
1817 const MachineRegisterInfo *MRI = &MF.getRegInfo();
1818 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1819 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
1821 ++i, ++realArgIdx) {
1822 CCValAssign &VA = ArgLocs[i];
1823 EVT RegVT = VA.getLocVT();
1824 SDValue Arg = OutVals[realArgIdx];
1825 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
1826 if (VA.getLocInfo() == CCValAssign::Indirect)
1828 if (VA.needsCustom()) {
1829 // f64 and vector types are split into multiple registers or
1830 // register/stack-slot combinations. The types will not match
1831 // the registers; give up on memory f64 refs until we figure
1832 // out what to do about this.
1835 if (!ArgLocs[++i].isRegLoc())
1837 if (RegVT == MVT::v2f64) {
1838 if (!ArgLocs[++i].isRegLoc())
1840 if (!ArgLocs[++i].isRegLoc())
1843 } else if (!VA.isRegLoc()) {
1844 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
1856 ARMTargetLowering::LowerReturn(SDValue Chain,
1857 CallingConv::ID CallConv, bool isVarArg,
1858 const SmallVectorImpl<ISD::OutputArg> &Outs,
1859 const SmallVectorImpl<SDValue> &OutVals,
1860 DebugLoc dl, SelectionDAG &DAG) const {
1862 // CCValAssign - represent the assignment of the return value to a location.
1863 SmallVector<CCValAssign, 16> RVLocs;
1865 // CCState - Info about the registers and stack slots.
1866 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1867 getTargetMachine(), RVLocs, *DAG.getContext(), Call);
1869 // Analyze outgoing return values.
1870 CCInfo.AnalyzeReturn(Outs, CCAssignFnForNode(CallConv, /* Return */ true,
1873 // If this is the first return lowered for this function, add
1874 // the regs to the liveout set for the function.
1875 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
1876 for (unsigned i = 0; i != RVLocs.size(); ++i)
1877 if (RVLocs[i].isRegLoc())
1878 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
1883 // Copy the result values into the output registers.
1884 for (unsigned i = 0, realRVLocIdx = 0;
1886 ++i, ++realRVLocIdx) {
1887 CCValAssign &VA = RVLocs[i];
1888 assert(VA.isRegLoc() && "Can only return in registers!");
1890 SDValue Arg = OutVals[realRVLocIdx];
1892 switch (VA.getLocInfo()) {
1893 default: llvm_unreachable("Unknown loc info!");
1894 case CCValAssign::Full: break;
1895 case CCValAssign::BCvt:
1896 Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg);
1900 if (VA.needsCustom()) {
1901 if (VA.getLocVT() == MVT::v2f64) {
1902 // Extract the first half and return it in two registers.
1903 SDValue Half = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1904 DAG.getConstant(0, MVT::i32));
1905 SDValue HalfGPRs = DAG.getNode(ARMISD::VMOVRRD, dl,
1906 DAG.getVTList(MVT::i32, MVT::i32), Half);
1908 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), HalfGPRs, Flag);
1909 Flag = Chain.getValue(1);
1910 VA = RVLocs[++i]; // skip ahead to next loc
1911 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
1912 HalfGPRs.getValue(1), Flag);
1913 Flag = Chain.getValue(1);
1914 VA = RVLocs[++i]; // skip ahead to next loc
1916 // Extract the 2nd half and fall through to handle it as an f64 value.
1917 Arg = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1918 DAG.getConstant(1, MVT::i32));
1920 // Legalize ret f64 -> ret 2 x i32. We always have fmrrd if f64 is
1922 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
1923 DAG.getVTList(MVT::i32, MVT::i32), &Arg, 1);
1924 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), fmrrd, Flag);
1925 Flag = Chain.getValue(1);
1926 VA = RVLocs[++i]; // skip ahead to next loc
1927 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), fmrrd.getValue(1),
1930 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), Arg, Flag);
1932 // Guarantee that all emitted copies are
1933 // stuck together, avoiding something bad.
1934 Flag = Chain.getValue(1);
1939 result = DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, Chain, Flag);
1941 result = DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, Chain);
1946 bool ARMTargetLowering::isUsedByReturnOnly(SDNode *N, SDValue &Chain) const {
1947 if (N->getNumValues() != 1)
1949 if (!N->hasNUsesOfValue(1, 0))
1952 SDValue TCChain = Chain;
1953 SDNode *Copy = *N->use_begin();
1954 if (Copy->getOpcode() == ISD::CopyToReg) {
1955 // If the copy has a glue operand, we conservatively assume it isn't safe to
1956 // perform a tail call.
1957 if (Copy->getOperand(Copy->getNumOperands()-1).getValueType() == MVT::Glue)
1959 TCChain = Copy->getOperand(0);
1960 } else if (Copy->getOpcode() == ARMISD::VMOVRRD) {
1961 SDNode *VMov = Copy;
1962 // f64 returned in a pair of GPRs.
1963 SmallPtrSet<SDNode*, 2> Copies;
1964 for (SDNode::use_iterator UI = VMov->use_begin(), UE = VMov->use_end();
1966 if (UI->getOpcode() != ISD::CopyToReg)
1970 if (Copies.size() > 2)
1973 for (SDNode::use_iterator UI = VMov->use_begin(), UE = VMov->use_end();
1975 SDValue UseChain = UI->getOperand(0);
1976 if (Copies.count(UseChain.getNode()))
1983 } else if (Copy->getOpcode() == ISD::BITCAST) {
1984 // f32 returned in a single GPR.
1985 if (!Copy->hasOneUse())
1987 Copy = *Copy->use_begin();
1988 if (Copy->getOpcode() != ISD::CopyToReg || !Copy->hasNUsesOfValue(1, 0))
1990 Chain = Copy->getOperand(0);
1995 bool HasRet = false;
1996 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
1998 if (UI->getOpcode() != ARMISD::RET_FLAG)
2010 bool ARMTargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
2011 if (!EnableARMTailCalls && !Subtarget->supportsTailCall())
2014 if (!CI->isTailCall())
2017 return !Subtarget->isThumb1Only();
2020 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
2021 // their target counterpart wrapped in the ARMISD::Wrapper node. Suppose N is
2022 // one of the above mentioned nodes. It has to be wrapped because otherwise
2023 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
2024 // be used to form addressing mode. These wrapped nodes will be selected
2026 static SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) {
2027 EVT PtrVT = Op.getValueType();
2028 // FIXME there is no actual debug info here
2029 DebugLoc dl = Op.getDebugLoc();
2030 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
2032 if (CP->isMachineConstantPoolEntry())
2033 Res = DAG.getTargetConstantPool(CP->getMachineCPVal(), PtrVT,
2034 CP->getAlignment());
2036 Res = DAG.getTargetConstantPool(CP->getConstVal(), PtrVT,
2037 CP->getAlignment());
2038 return DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Res);
2041 unsigned ARMTargetLowering::getJumpTableEncoding() const {
2042 return MachineJumpTableInfo::EK_Inline;
2045 SDValue ARMTargetLowering::LowerBlockAddress(SDValue Op,
2046 SelectionDAG &DAG) const {
2047 MachineFunction &MF = DAG.getMachineFunction();
2048 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2049 unsigned ARMPCLabelIndex = 0;
2050 DebugLoc DL = Op.getDebugLoc();
2051 EVT PtrVT = getPointerTy();
2052 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
2053 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2055 if (RelocM == Reloc::Static) {
2056 CPAddr = DAG.getTargetConstantPool(BA, PtrVT, 4);
2058 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
2059 ARMPCLabelIndex = AFI->createPICLabelUId();
2060 ARMConstantPoolValue *CPV =
2061 ARMConstantPoolConstant::Create(BA, ARMPCLabelIndex,
2062 ARMCP::CPBlockAddress, PCAdj);
2063 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2065 CPAddr = DAG.getNode(ARMISD::Wrapper, DL, PtrVT, CPAddr);
2066 SDValue Result = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), CPAddr,
2067 MachinePointerInfo::getConstantPool(),
2068 false, false, false, 0);
2069 if (RelocM == Reloc::Static)
2071 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2072 return DAG.getNode(ARMISD::PIC_ADD, DL, PtrVT, Result, PICLabel);
2075 // Lower ISD::GlobalTLSAddress using the "general dynamic" model
2077 ARMTargetLowering::LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA,
2078 SelectionDAG &DAG) const {
2079 DebugLoc dl = GA->getDebugLoc();
2080 EVT PtrVT = getPointerTy();
2081 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
2082 MachineFunction &MF = DAG.getMachineFunction();
2083 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2084 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2085 ARMConstantPoolValue *CPV =
2086 ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex,
2087 ARMCP::CPValue, PCAdj, ARMCP::TLSGD, true);
2088 SDValue Argument = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2089 Argument = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Argument);
2090 Argument = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Argument,
2091 MachinePointerInfo::getConstantPool(),
2092 false, false, false, 0);
2093 SDValue Chain = Argument.getValue(1);
2095 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2096 Argument = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Argument, PICLabel);
2098 // call __tls_get_addr.
2101 Entry.Node = Argument;
2102 Entry.Ty = (Type *) Type::getInt32Ty(*DAG.getContext());
2103 Args.push_back(Entry);
2104 // FIXME: is there useful debug info available here?
2105 TargetLowering::CallLoweringInfo CLI(Chain,
2106 (Type *) Type::getInt32Ty(*DAG.getContext()),
2107 false, false, false, false,
2108 0, CallingConv::C, /*isTailCall=*/false,
2109 /*doesNotRet=*/false, /*isReturnValueUsed=*/true,
2110 DAG.getExternalSymbol("__tls_get_addr", PtrVT), Args, DAG, dl);
2111 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
2112 return CallResult.first;
2115 // Lower ISD::GlobalTLSAddress using the "initial exec" or
2116 // "local exec" model.
2118 ARMTargetLowering::LowerToTLSExecModels(GlobalAddressSDNode *GA,
2120 TLSModel::Model model) const {
2121 const GlobalValue *GV = GA->getGlobal();
2122 DebugLoc dl = GA->getDebugLoc();
2124 SDValue Chain = DAG.getEntryNode();
2125 EVT PtrVT = getPointerTy();
2126 // Get the Thread Pointer
2127 SDValue ThreadPointer = DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
2129 if (model == TLSModel::InitialExec) {
2130 MachineFunction &MF = DAG.getMachineFunction();
2131 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2132 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2133 // Initial exec model.
2134 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
2135 ARMConstantPoolValue *CPV =
2136 ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex,
2137 ARMCP::CPValue, PCAdj, ARMCP::GOTTPOFF,
2139 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2140 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
2141 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2142 MachinePointerInfo::getConstantPool(),
2143 false, false, false, 0);
2144 Chain = Offset.getValue(1);
2146 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2147 Offset = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Offset, PICLabel);
2149 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2150 MachinePointerInfo::getConstantPool(),
2151 false, false, false, 0);
2154 assert(model == TLSModel::LocalExec);
2155 ARMConstantPoolValue *CPV =
2156 ARMConstantPoolConstant::Create(GV, ARMCP::TPOFF);
2157 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2158 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
2159 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2160 MachinePointerInfo::getConstantPool(),
2161 false, false, false, 0);
2164 // The address of the thread local variable is the add of the thread
2165 // pointer with the offset of the variable.
2166 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
2170 ARMTargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
2171 // TODO: implement the "local dynamic" model
2172 assert(Subtarget->isTargetELF() &&
2173 "TLS not implemented for non-ELF targets");
2174 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
2176 TLSModel::Model model = getTargetMachine().getTLSModel(GA->getGlobal());
2179 case TLSModel::GeneralDynamic:
2180 case TLSModel::LocalDynamic:
2181 return LowerToTLSGeneralDynamicModel(GA, DAG);
2182 case TLSModel::InitialExec:
2183 case TLSModel::LocalExec:
2184 return LowerToTLSExecModels(GA, DAG, model);
2186 llvm_unreachable("bogus TLS model");
2189 SDValue ARMTargetLowering::LowerGlobalAddressELF(SDValue Op,
2190 SelectionDAG &DAG) const {
2191 EVT PtrVT = getPointerTy();
2192 DebugLoc dl = Op.getDebugLoc();
2193 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2194 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2195 if (RelocM == Reloc::PIC_) {
2196 bool UseGOTOFF = GV->hasLocalLinkage() || GV->hasHiddenVisibility();
2197 ARMConstantPoolValue *CPV =
2198 ARMConstantPoolConstant::Create(GV,
2199 UseGOTOFF ? ARMCP::GOTOFF : ARMCP::GOT);
2200 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2201 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2202 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
2204 MachinePointerInfo::getConstantPool(),
2205 false, false, false, 0);
2206 SDValue Chain = Result.getValue(1);
2207 SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(PtrVT);
2208 Result = DAG.getNode(ISD::ADD, dl, PtrVT, Result, GOT);
2210 Result = DAG.getLoad(PtrVT, dl, Chain, Result,
2211 MachinePointerInfo::getGOT(),
2212 false, false, false, 0);
2216 // If we have T2 ops, we can materialize the address directly via movt/movw
2217 // pair. This is always cheaper.
2218 if (Subtarget->useMovt()) {
2220 // FIXME: Once remat is capable of dealing with instructions with register
2221 // operands, expand this into two nodes.
2222 return DAG.getNode(ARMISD::Wrapper, dl, PtrVT,
2223 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2225 SDValue CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
2226 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2227 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2228 MachinePointerInfo::getConstantPool(),
2229 false, false, false, 0);
2233 SDValue ARMTargetLowering::LowerGlobalAddressDarwin(SDValue Op,
2234 SelectionDAG &DAG) const {
2235 EVT PtrVT = getPointerTy();
2236 DebugLoc dl = Op.getDebugLoc();
2237 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2238 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2239 MachineFunction &MF = DAG.getMachineFunction();
2240 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2242 // FIXME: Enable this for static codegen when tool issues are fixed. Also
2243 // update ARMFastISel::ARMMaterializeGV.
2244 if (Subtarget->useMovt() && RelocM != Reloc::Static) {
2246 // FIXME: Once remat is capable of dealing with instructions with register
2247 // operands, expand this into two nodes.
2248 if (RelocM == Reloc::Static)
2249 return DAG.getNode(ARMISD::Wrapper, dl, PtrVT,
2250 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2252 unsigned Wrapper = (RelocM == Reloc::PIC_)
2253 ? ARMISD::WrapperPIC : ARMISD::WrapperDYN;
2254 SDValue Result = DAG.getNode(Wrapper, dl, PtrVT,
2255 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2256 if (Subtarget->GVIsIndirectSymbol(GV, RelocM))
2257 Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Result,
2258 MachinePointerInfo::getGOT(),
2259 false, false, false, 0);
2263 unsigned ARMPCLabelIndex = 0;
2265 if (RelocM == Reloc::Static) {
2266 CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
2268 ARMPCLabelIndex = AFI->createPICLabelUId();
2269 unsigned PCAdj = (RelocM != Reloc::PIC_) ? 0 : (Subtarget->isThumb()?4:8);
2270 ARMConstantPoolValue *CPV =
2271 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue,
2273 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2275 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2277 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2278 MachinePointerInfo::getConstantPool(),
2279 false, false, false, 0);
2280 SDValue Chain = Result.getValue(1);
2282 if (RelocM == Reloc::PIC_) {
2283 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2284 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2287 if (Subtarget->GVIsIndirectSymbol(GV, RelocM))
2288 Result = DAG.getLoad(PtrVT, dl, Chain, Result, MachinePointerInfo::getGOT(),
2289 false, false, false, 0);
2294 SDValue ARMTargetLowering::LowerGLOBAL_OFFSET_TABLE(SDValue Op,
2295 SelectionDAG &DAG) const {
2296 assert(Subtarget->isTargetELF() &&
2297 "GLOBAL OFFSET TABLE not implemented for non-ELF targets");
2298 MachineFunction &MF = DAG.getMachineFunction();
2299 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2300 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2301 EVT PtrVT = getPointerTy();
2302 DebugLoc dl = Op.getDebugLoc();
2303 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
2304 ARMConstantPoolValue *CPV =
2305 ARMConstantPoolSymbol::Create(*DAG.getContext(), "_GLOBAL_OFFSET_TABLE_",
2306 ARMPCLabelIndex, PCAdj);
2307 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2308 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2309 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2310 MachinePointerInfo::getConstantPool(),
2311 false, false, false, 0);
2312 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2313 return DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2317 ARMTargetLowering::LowerEH_SJLJ_SETJMP(SDValue Op, SelectionDAG &DAG) const {
2318 DebugLoc dl = Op.getDebugLoc();
2319 SDValue Val = DAG.getConstant(0, MVT::i32);
2320 return DAG.getNode(ARMISD::EH_SJLJ_SETJMP, dl,
2321 DAG.getVTList(MVT::i32, MVT::Other), Op.getOperand(0),
2322 Op.getOperand(1), Val);
2326 ARMTargetLowering::LowerEH_SJLJ_LONGJMP(SDValue Op, SelectionDAG &DAG) const {
2327 DebugLoc dl = Op.getDebugLoc();
2328 return DAG.getNode(ARMISD::EH_SJLJ_LONGJMP, dl, MVT::Other, Op.getOperand(0),
2329 Op.getOperand(1), DAG.getConstant(0, MVT::i32));
2333 ARMTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG,
2334 const ARMSubtarget *Subtarget) const {
2335 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
2336 DebugLoc dl = Op.getDebugLoc();
2338 default: return SDValue(); // Don't custom lower most intrinsics.
2339 case Intrinsic::arm_thread_pointer: {
2340 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2341 return DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
2343 case Intrinsic::eh_sjlj_lsda: {
2344 MachineFunction &MF = DAG.getMachineFunction();
2345 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2346 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2347 EVT PtrVT = getPointerTy();
2348 DebugLoc dl = Op.getDebugLoc();
2349 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2351 unsigned PCAdj = (RelocM != Reloc::PIC_)
2352 ? 0 : (Subtarget->isThumb() ? 4 : 8);
2353 ARMConstantPoolValue *CPV =
2354 ARMConstantPoolConstant::Create(MF.getFunction(), ARMPCLabelIndex,
2355 ARMCP::CPLSDA, PCAdj);
2356 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2357 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2359 DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2360 MachinePointerInfo::getConstantPool(),
2361 false, false, false, 0);
2363 if (RelocM == Reloc::PIC_) {
2364 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2365 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2369 case Intrinsic::arm_neon_vmulls:
2370 case Intrinsic::arm_neon_vmullu: {
2371 unsigned NewOpc = (IntNo == Intrinsic::arm_neon_vmulls)
2372 ? ARMISD::VMULLs : ARMISD::VMULLu;
2373 return DAG.getNode(NewOpc, Op.getDebugLoc(), Op.getValueType(),
2374 Op.getOperand(1), Op.getOperand(2));
2379 static SDValue LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG,
2380 const ARMSubtarget *Subtarget) {
2381 DebugLoc dl = Op.getDebugLoc();
2382 if (!Subtarget->hasDataBarrier()) {
2383 // Some ARMv6 cpus can support data barriers with an mcr instruction.
2384 // Thumb1 and pre-v6 ARM mode use a libcall instead and should never get
2386 assert(Subtarget->hasV6Ops() && !Subtarget->isThumb() &&
2387 "Unexpected ISD::MEMBARRIER encountered. Should be libcall!");
2388 return DAG.getNode(ARMISD::MEMBARRIER_MCR, dl, MVT::Other, Op.getOperand(0),
2389 DAG.getConstant(0, MVT::i32));
2392 SDValue Op5 = Op.getOperand(5);
2393 bool isDeviceBarrier = cast<ConstantSDNode>(Op5)->getZExtValue() != 0;
2394 unsigned isLL = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
2395 unsigned isLS = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
2396 bool isOnlyStoreBarrier = (isLL == 0 && isLS == 0);
2398 ARM_MB::MemBOpt DMBOpt;
2399 if (isDeviceBarrier)
2400 DMBOpt = isOnlyStoreBarrier ? ARM_MB::ST : ARM_MB::SY;
2402 DMBOpt = isOnlyStoreBarrier ? ARM_MB::ISHST : ARM_MB::ISH;
2403 return DAG.getNode(ARMISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0),
2404 DAG.getConstant(DMBOpt, MVT::i32));
2408 static SDValue LowerATOMIC_FENCE(SDValue Op, SelectionDAG &DAG,
2409 const ARMSubtarget *Subtarget) {
2410 // FIXME: handle "fence singlethread" more efficiently.
2411 DebugLoc dl = Op.getDebugLoc();
2412 if (!Subtarget->hasDataBarrier()) {
2413 // Some ARMv6 cpus can support data barriers with an mcr instruction.
2414 // Thumb1 and pre-v6 ARM mode use a libcall instead and should never get
2416 assert(Subtarget->hasV6Ops() && !Subtarget->isThumb() &&
2417 "Unexpected ISD::MEMBARRIER encountered. Should be libcall!");
2418 return DAG.getNode(ARMISD::MEMBARRIER_MCR, dl, MVT::Other, Op.getOperand(0),
2419 DAG.getConstant(0, MVT::i32));
2422 return DAG.getNode(ARMISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0),
2423 DAG.getConstant(ARM_MB::ISH, MVT::i32));
2426 static SDValue LowerPREFETCH(SDValue Op, SelectionDAG &DAG,
2427 const ARMSubtarget *Subtarget) {
2428 // ARM pre v5TE and Thumb1 does not have preload instructions.
2429 if (!(Subtarget->isThumb2() ||
2430 (!Subtarget->isThumb1Only() && Subtarget->hasV5TEOps())))
2431 // Just preserve the chain.
2432 return Op.getOperand(0);
2434 DebugLoc dl = Op.getDebugLoc();
2435 unsigned isRead = ~cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue() & 1;
2437 (!Subtarget->hasV7Ops() || !Subtarget->hasMPExtension()))
2438 // ARMv7 with MP extension has PLDW.
2439 return Op.getOperand(0);
2441 unsigned isData = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
2442 if (Subtarget->isThumb()) {
2444 isRead = ~isRead & 1;
2445 isData = ~isData & 1;
2448 return DAG.getNode(ARMISD::PRELOAD, dl, MVT::Other, Op.getOperand(0),
2449 Op.getOperand(1), DAG.getConstant(isRead, MVT::i32),
2450 DAG.getConstant(isData, MVT::i32));
2453 static SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) {
2454 MachineFunction &MF = DAG.getMachineFunction();
2455 ARMFunctionInfo *FuncInfo = MF.getInfo<ARMFunctionInfo>();
2457 // vastart just stores the address of the VarArgsFrameIndex slot into the
2458 // memory location argument.
2459 DebugLoc dl = Op.getDebugLoc();
2460 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2461 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
2462 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
2463 return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1),
2464 MachinePointerInfo(SV), false, false, 0);
2468 ARMTargetLowering::GetF64FormalArgument(CCValAssign &VA, CCValAssign &NextVA,
2469 SDValue &Root, SelectionDAG &DAG,
2470 DebugLoc dl) const {
2471 MachineFunction &MF = DAG.getMachineFunction();
2472 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2474 const TargetRegisterClass *RC;
2475 if (AFI->isThumb1OnlyFunction())
2476 RC = &ARM::tGPRRegClass;
2478 RC = &ARM::GPRRegClass;
2480 // Transform the arguments stored in physical registers into virtual ones.
2481 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2482 SDValue ArgValue = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2485 if (NextVA.isMemLoc()) {
2486 MachineFrameInfo *MFI = MF.getFrameInfo();
2487 int FI = MFI->CreateFixedObject(4, NextVA.getLocMemOffset(), true);
2489 // Create load node to retrieve arguments from the stack.
2490 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2491 ArgValue2 = DAG.getLoad(MVT::i32, dl, Root, FIN,
2492 MachinePointerInfo::getFixedStack(FI),
2493 false, false, false, 0);
2495 Reg = MF.addLiveIn(NextVA.getLocReg(), RC);
2496 ArgValue2 = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2499 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, ArgValue, ArgValue2);
2503 ARMTargetLowering::computeRegArea(CCState &CCInfo, MachineFunction &MF,
2504 unsigned &VARegSize, unsigned &VARegSaveSize)
2507 if (CCInfo.isFirstByValRegValid())
2508 NumGPRs = ARM::R4 - CCInfo.getFirstByValReg();
2510 unsigned int firstUnalloced;
2511 firstUnalloced = CCInfo.getFirstUnallocated(GPRArgRegs,
2512 sizeof(GPRArgRegs) /
2513 sizeof(GPRArgRegs[0]));
2514 NumGPRs = (firstUnalloced <= 3) ? (4 - firstUnalloced) : 0;
2517 unsigned Align = MF.getTarget().getFrameLowering()->getStackAlignment();
2518 VARegSize = NumGPRs * 4;
2519 VARegSaveSize = (VARegSize + Align - 1) & ~(Align - 1);
2522 // The remaining GPRs hold either the beginning of variable-argument
2523 // data, or the beginning of an aggregate passed by value (usuall
2524 // byval). Either way, we allocate stack slots adjacent to the data
2525 // provided by our caller, and store the unallocated registers there.
2526 // If this is a variadic function, the va_list pointer will begin with
2527 // these values; otherwise, this reassembles a (byval) structure that
2528 // was split between registers and memory.
2530 ARMTargetLowering::VarArgStyleRegisters(CCState &CCInfo, SelectionDAG &DAG,
2531 DebugLoc dl, SDValue &Chain,
2532 unsigned ArgOffset) const {
2533 MachineFunction &MF = DAG.getMachineFunction();
2534 MachineFrameInfo *MFI = MF.getFrameInfo();
2535 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2536 unsigned firstRegToSaveIndex;
2537 if (CCInfo.isFirstByValRegValid())
2538 firstRegToSaveIndex = CCInfo.getFirstByValReg() - ARM::R0;
2540 firstRegToSaveIndex = CCInfo.getFirstUnallocated
2541 (GPRArgRegs, sizeof(GPRArgRegs) / sizeof(GPRArgRegs[0]));
2544 unsigned VARegSize, VARegSaveSize;
2545 computeRegArea(CCInfo, MF, VARegSize, VARegSaveSize);
2546 if (VARegSaveSize) {
2547 // If this function is vararg, store any remaining integer argument regs
2548 // to their spots on the stack so that they may be loaded by deferencing
2549 // the result of va_next.
2550 AFI->setVarArgsRegSaveSize(VARegSaveSize);
2551 AFI->setVarArgsFrameIndex(MFI->CreateFixedObject(VARegSaveSize,
2552 ArgOffset + VARegSaveSize
2555 SDValue FIN = DAG.getFrameIndex(AFI->getVarArgsFrameIndex(),
2558 SmallVector<SDValue, 4> MemOps;
2559 for (; firstRegToSaveIndex < 4; ++firstRegToSaveIndex) {
2560 const TargetRegisterClass *RC;
2561 if (AFI->isThumb1OnlyFunction())
2562 RC = &ARM::tGPRRegClass;
2564 RC = &ARM::GPRRegClass;
2566 unsigned VReg = MF.addLiveIn(GPRArgRegs[firstRegToSaveIndex], RC);
2567 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
2569 DAG.getStore(Val.getValue(1), dl, Val, FIN,
2570 MachinePointerInfo::getFixedStack(AFI->getVarArgsFrameIndex()),
2572 MemOps.push_back(Store);
2573 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), FIN,
2574 DAG.getConstant(4, getPointerTy()));
2576 if (!MemOps.empty())
2577 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2578 &MemOps[0], MemOps.size());
2580 // This will point to the next argument passed via stack.
2581 AFI->setVarArgsFrameIndex(MFI->CreateFixedObject(4, ArgOffset, true));
2585 ARMTargetLowering::LowerFormalArguments(SDValue Chain,
2586 CallingConv::ID CallConv, bool isVarArg,
2587 const SmallVectorImpl<ISD::InputArg>
2589 DebugLoc dl, SelectionDAG &DAG,
2590 SmallVectorImpl<SDValue> &InVals)
2592 MachineFunction &MF = DAG.getMachineFunction();
2593 MachineFrameInfo *MFI = MF.getFrameInfo();
2595 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2597 // Assign locations to all of the incoming arguments.
2598 SmallVector<CCValAssign, 16> ArgLocs;
2599 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2600 getTargetMachine(), ArgLocs, *DAG.getContext(), Prologue);
2601 CCInfo.AnalyzeFormalArguments(Ins,
2602 CCAssignFnForNode(CallConv, /* Return*/ false,
2605 SmallVector<SDValue, 16> ArgValues;
2606 int lastInsIndex = -1;
2609 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2610 CCValAssign &VA = ArgLocs[i];
2612 // Arguments stored in registers.
2613 if (VA.isRegLoc()) {
2614 EVT RegVT = VA.getLocVT();
2616 if (VA.needsCustom()) {
2617 // f64 and vector types are split up into multiple registers or
2618 // combinations of registers and stack slots.
2619 if (VA.getLocVT() == MVT::v2f64) {
2620 SDValue ArgValue1 = GetF64FormalArgument(VA, ArgLocs[++i],
2622 VA = ArgLocs[++i]; // skip ahead to next loc
2624 if (VA.isMemLoc()) {
2625 int FI = MFI->CreateFixedObject(8, VA.getLocMemOffset(), true);
2626 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2627 ArgValue2 = DAG.getLoad(MVT::f64, dl, Chain, FIN,
2628 MachinePointerInfo::getFixedStack(FI),
2629 false, false, false, 0);
2631 ArgValue2 = GetF64FormalArgument(VA, ArgLocs[++i],
2634 ArgValue = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
2635 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
2636 ArgValue, ArgValue1, DAG.getIntPtrConstant(0));
2637 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
2638 ArgValue, ArgValue2, DAG.getIntPtrConstant(1));
2640 ArgValue = GetF64FormalArgument(VA, ArgLocs[++i], Chain, DAG, dl);
2643 const TargetRegisterClass *RC;
2645 if (RegVT == MVT::f32)
2646 RC = &ARM::SPRRegClass;
2647 else if (RegVT == MVT::f64)
2648 RC = &ARM::DPRRegClass;
2649 else if (RegVT == MVT::v2f64)
2650 RC = &ARM::QPRRegClass;
2651 else if (RegVT == MVT::i32)
2652 RC = AFI->isThumb1OnlyFunction() ?
2653 (const TargetRegisterClass*)&ARM::tGPRRegClass :
2654 (const TargetRegisterClass*)&ARM::GPRRegClass;
2656 llvm_unreachable("RegVT not supported by FORMAL_ARGUMENTS Lowering");
2658 // Transform the arguments in physical registers into virtual ones.
2659 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2660 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
2663 // If this is an 8 or 16-bit value, it is really passed promoted
2664 // to 32 bits. Insert an assert[sz]ext to capture this, then
2665 // truncate to the right size.
2666 switch (VA.getLocInfo()) {
2667 default: llvm_unreachable("Unknown loc info!");
2668 case CCValAssign::Full: break;
2669 case CCValAssign::BCvt:
2670 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
2672 case CCValAssign::SExt:
2673 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
2674 DAG.getValueType(VA.getValVT()));
2675 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
2677 case CCValAssign::ZExt:
2678 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
2679 DAG.getValueType(VA.getValVT()));
2680 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
2684 InVals.push_back(ArgValue);
2686 } else { // VA.isRegLoc()
2689 assert(VA.isMemLoc());
2690 assert(VA.getValVT() != MVT::i64 && "i64 should already be lowered");
2692 int index = ArgLocs[i].getValNo();
2694 // Some Ins[] entries become multiple ArgLoc[] entries.
2695 // Process them only once.
2696 if (index != lastInsIndex)
2698 ISD::ArgFlagsTy Flags = Ins[index].Flags;
2699 // FIXME: For now, all byval parameter objects are marked mutable.
2700 // This can be changed with more analysis.
2701 // In case of tail call optimization mark all arguments mutable.
2702 // Since they could be overwritten by lowering of arguments in case of
2704 if (Flags.isByVal()) {
2705 unsigned VARegSize, VARegSaveSize;
2706 computeRegArea(CCInfo, MF, VARegSize, VARegSaveSize);
2707 VarArgStyleRegisters(CCInfo, DAG, dl, Chain, 0);
2708 unsigned Bytes = Flags.getByValSize() - VARegSize;
2709 if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
2710 int FI = MFI->CreateFixedObject(Bytes,
2711 VA.getLocMemOffset(), false);
2712 InVals.push_back(DAG.getFrameIndex(FI, getPointerTy()));
2714 int FI = MFI->CreateFixedObject(VA.getLocVT().getSizeInBits()/8,
2715 VA.getLocMemOffset(), true);
2717 // Create load nodes to retrieve arguments from the stack.
2718 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2719 InVals.push_back(DAG.getLoad(VA.getValVT(), dl, Chain, FIN,
2720 MachinePointerInfo::getFixedStack(FI),
2721 false, false, false, 0));
2723 lastInsIndex = index;
2730 VarArgStyleRegisters(CCInfo, DAG, dl, Chain, CCInfo.getNextStackOffset());
2735 /// isFloatingPointZero - Return true if this is +0.0.
2736 static bool isFloatingPointZero(SDValue Op) {
2737 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op))
2738 return CFP->getValueAPF().isPosZero();
2739 else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) {
2740 // Maybe this has already been legalized into the constant pool?
2741 if (Op.getOperand(1).getOpcode() == ARMISD::Wrapper) {
2742 SDValue WrapperOp = Op.getOperand(1).getOperand(0);
2743 if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(WrapperOp))
2744 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal()))
2745 return CFP->getValueAPF().isPosZero();
2751 /// Returns appropriate ARM CMP (cmp) and corresponding condition code for
2752 /// the given operands.
2754 ARMTargetLowering::getARMCmp(SDValue LHS, SDValue RHS, ISD::CondCode CC,
2755 SDValue &ARMcc, SelectionDAG &DAG,
2756 DebugLoc dl) const {
2757 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS.getNode())) {
2758 unsigned C = RHSC->getZExtValue();
2759 if (!isLegalICmpImmediate(C)) {
2760 // Constant does not fit, try adjusting it by one?
2765 if (C != 0x80000000 && isLegalICmpImmediate(C-1)) {
2766 CC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGT;
2767 RHS = DAG.getConstant(C-1, MVT::i32);
2772 if (C != 0 && isLegalICmpImmediate(C-1)) {
2773 CC = (CC == ISD::SETULT) ? ISD::SETULE : ISD::SETUGT;
2774 RHS = DAG.getConstant(C-1, MVT::i32);
2779 if (C != 0x7fffffff && isLegalICmpImmediate(C+1)) {
2780 CC = (CC == ISD::SETLE) ? ISD::SETLT : ISD::SETGE;
2781 RHS = DAG.getConstant(C+1, MVT::i32);
2786 if (C != 0xffffffff && isLegalICmpImmediate(C+1)) {
2787 CC = (CC == ISD::SETULE) ? ISD::SETULT : ISD::SETUGE;
2788 RHS = DAG.getConstant(C+1, MVT::i32);
2795 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
2796 ARMISD::NodeType CompareType;
2799 CompareType = ARMISD::CMP;
2804 CompareType = ARMISD::CMPZ;
2807 ARMcc = DAG.getConstant(CondCode, MVT::i32);
2808 return DAG.getNode(CompareType, dl, MVT::Glue, LHS, RHS);
2811 /// Returns a appropriate VFP CMP (fcmp{s|d}+fmstat) for the given operands.
2813 ARMTargetLowering::getVFPCmp(SDValue LHS, SDValue RHS, SelectionDAG &DAG,
2814 DebugLoc dl) const {
2816 if (!isFloatingPointZero(RHS))
2817 Cmp = DAG.getNode(ARMISD::CMPFP, dl, MVT::Glue, LHS, RHS);
2819 Cmp = DAG.getNode(ARMISD::CMPFPw0, dl, MVT::Glue, LHS);
2820 return DAG.getNode(ARMISD::FMSTAT, dl, MVT::Glue, Cmp);
2823 /// duplicateCmp - Glue values can have only one use, so this function
2824 /// duplicates a comparison node.
2826 ARMTargetLowering::duplicateCmp(SDValue Cmp, SelectionDAG &DAG) const {
2827 unsigned Opc = Cmp.getOpcode();
2828 DebugLoc DL = Cmp.getDebugLoc();
2829 if (Opc == ARMISD::CMP || Opc == ARMISD::CMPZ)
2830 return DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1));
2832 assert(Opc == ARMISD::FMSTAT && "unexpected comparison operation");
2833 Cmp = Cmp.getOperand(0);
2834 Opc = Cmp.getOpcode();
2835 if (Opc == ARMISD::CMPFP)
2836 Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1));
2838 assert(Opc == ARMISD::CMPFPw0 && "unexpected operand of FMSTAT");
2839 Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0));
2841 return DAG.getNode(ARMISD::FMSTAT, DL, MVT::Glue, Cmp);
2844 SDValue ARMTargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
2845 SDValue Cond = Op.getOperand(0);
2846 SDValue SelectTrue = Op.getOperand(1);
2847 SDValue SelectFalse = Op.getOperand(2);
2848 DebugLoc dl = Op.getDebugLoc();
2852 // (select (cmov 1, 0, cond), t, f) -> (cmov t, f, cond)
2853 // (select (cmov 0, 1, cond), t, f) -> (cmov f, t, cond)
2855 if (Cond.getOpcode() == ARMISD::CMOV && Cond.hasOneUse()) {
2856 const ConstantSDNode *CMOVTrue =
2857 dyn_cast<ConstantSDNode>(Cond.getOperand(0));
2858 const ConstantSDNode *CMOVFalse =
2859 dyn_cast<ConstantSDNode>(Cond.getOperand(1));
2861 if (CMOVTrue && CMOVFalse) {
2862 unsigned CMOVTrueVal = CMOVTrue->getZExtValue();
2863 unsigned CMOVFalseVal = CMOVFalse->getZExtValue();
2867 if (CMOVTrueVal == 1 && CMOVFalseVal == 0) {
2869 False = SelectFalse;
2870 } else if (CMOVTrueVal == 0 && CMOVFalseVal == 1) {
2875 if (True.getNode() && False.getNode()) {
2876 EVT VT = Op.getValueType();
2877 SDValue ARMcc = Cond.getOperand(2);
2878 SDValue CCR = Cond.getOperand(3);
2879 SDValue Cmp = duplicateCmp(Cond.getOperand(4), DAG);
2880 assert(True.getValueType() == VT);
2881 return DAG.getNode(ARMISD::CMOV, dl, VT, True, False, ARMcc, CCR, Cmp);
2886 // ARM's BooleanContents value is UndefinedBooleanContent. Mask out the
2887 // undefined bits before doing a full-word comparison with zero.
2888 Cond = DAG.getNode(ISD::AND, dl, Cond.getValueType(), Cond,
2889 DAG.getConstant(1, Cond.getValueType()));
2891 return DAG.getSelectCC(dl, Cond,
2892 DAG.getConstant(0, Cond.getValueType()),
2893 SelectTrue, SelectFalse, ISD::SETNE);
2896 SDValue ARMTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
2897 EVT VT = Op.getValueType();
2898 SDValue LHS = Op.getOperand(0);
2899 SDValue RHS = Op.getOperand(1);
2900 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
2901 SDValue TrueVal = Op.getOperand(2);
2902 SDValue FalseVal = Op.getOperand(3);
2903 DebugLoc dl = Op.getDebugLoc();
2905 if (LHS.getValueType() == MVT::i32) {
2907 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2908 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
2909 return DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc, CCR,Cmp);
2912 ARMCC::CondCodes CondCode, CondCode2;
2913 FPCCToARMCC(CC, CondCode, CondCode2);
2915 SDValue ARMcc = DAG.getConstant(CondCode, MVT::i32);
2916 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
2917 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2918 SDValue Result = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal,
2920 if (CondCode2 != ARMCC::AL) {
2921 SDValue ARMcc2 = DAG.getConstant(CondCode2, MVT::i32);
2922 // FIXME: Needs another CMP because flag can have but one use.
2923 SDValue Cmp2 = getVFPCmp(LHS, RHS, DAG, dl);
2924 Result = DAG.getNode(ARMISD::CMOV, dl, VT,
2925 Result, TrueVal, ARMcc2, CCR, Cmp2);
2930 /// canChangeToInt - Given the fp compare operand, return true if it is suitable
2931 /// to morph to an integer compare sequence.
2932 static bool canChangeToInt(SDValue Op, bool &SeenZero,
2933 const ARMSubtarget *Subtarget) {
2934 SDNode *N = Op.getNode();
2935 if (!N->hasOneUse())
2936 // Otherwise it requires moving the value from fp to integer registers.
2938 if (!N->getNumValues())
2940 EVT VT = Op.getValueType();
2941 if (VT != MVT::f32 && !Subtarget->isFPBrccSlow())
2942 // f32 case is generally profitable. f64 case only makes sense when vcmpe +
2943 // vmrs are very slow, e.g. cortex-a8.
2946 if (isFloatingPointZero(Op)) {
2950 return ISD::isNormalLoad(N);
2953 static SDValue bitcastf32Toi32(SDValue Op, SelectionDAG &DAG) {
2954 if (isFloatingPointZero(Op))
2955 return DAG.getConstant(0, MVT::i32);
2957 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op))
2958 return DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2959 Ld->getChain(), Ld->getBasePtr(), Ld->getPointerInfo(),
2960 Ld->isVolatile(), Ld->isNonTemporal(),
2961 Ld->isInvariant(), Ld->getAlignment());
2963 llvm_unreachable("Unknown VFP cmp argument!");
2966 static void expandf64Toi32(SDValue Op, SelectionDAG &DAG,
2967 SDValue &RetVal1, SDValue &RetVal2) {
2968 if (isFloatingPointZero(Op)) {
2969 RetVal1 = DAG.getConstant(0, MVT::i32);
2970 RetVal2 = DAG.getConstant(0, MVT::i32);
2974 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op)) {
2975 SDValue Ptr = Ld->getBasePtr();
2976 RetVal1 = DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2977 Ld->getChain(), Ptr,
2978 Ld->getPointerInfo(),
2979 Ld->isVolatile(), Ld->isNonTemporal(),
2980 Ld->isInvariant(), Ld->getAlignment());
2982 EVT PtrType = Ptr.getValueType();
2983 unsigned NewAlign = MinAlign(Ld->getAlignment(), 4);
2984 SDValue NewPtr = DAG.getNode(ISD::ADD, Op.getDebugLoc(),
2985 PtrType, Ptr, DAG.getConstant(4, PtrType));
2986 RetVal2 = DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2987 Ld->getChain(), NewPtr,
2988 Ld->getPointerInfo().getWithOffset(4),
2989 Ld->isVolatile(), Ld->isNonTemporal(),
2990 Ld->isInvariant(), NewAlign);
2994 llvm_unreachable("Unknown VFP cmp argument!");
2997 /// OptimizeVFPBrcond - With -enable-unsafe-fp-math, it's legal to optimize some
2998 /// f32 and even f64 comparisons to integer ones.
3000 ARMTargetLowering::OptimizeVFPBrcond(SDValue Op, SelectionDAG &DAG) const {
3001 SDValue Chain = Op.getOperand(0);
3002 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
3003 SDValue LHS = Op.getOperand(2);
3004 SDValue RHS = Op.getOperand(3);
3005 SDValue Dest = Op.getOperand(4);
3006 DebugLoc dl = Op.getDebugLoc();
3008 bool LHSSeenZero = false;
3009 bool LHSOk = canChangeToInt(LHS, LHSSeenZero, Subtarget);
3010 bool RHSSeenZero = false;
3011 bool RHSOk = canChangeToInt(RHS, RHSSeenZero, Subtarget);
3012 if (LHSOk && RHSOk && (LHSSeenZero || RHSSeenZero)) {
3013 // If unsafe fp math optimization is enabled and there are no other uses of
3014 // the CMP operands, and the condition code is EQ or NE, we can optimize it
3015 // to an integer comparison.
3016 if (CC == ISD::SETOEQ)
3018 else if (CC == ISD::SETUNE)
3021 SDValue Mask = DAG.getConstant(0x7fffffff, MVT::i32);
3023 if (LHS.getValueType() == MVT::f32) {
3024 LHS = DAG.getNode(ISD::AND, dl, MVT::i32,
3025 bitcastf32Toi32(LHS, DAG), Mask);
3026 RHS = DAG.getNode(ISD::AND, dl, MVT::i32,
3027 bitcastf32Toi32(RHS, DAG), Mask);
3028 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
3029 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3030 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
3031 Chain, Dest, ARMcc, CCR, Cmp);
3036 expandf64Toi32(LHS, DAG, LHS1, LHS2);
3037 expandf64Toi32(RHS, DAG, RHS1, RHS2);
3038 LHS2 = DAG.getNode(ISD::AND, dl, MVT::i32, LHS2, Mask);
3039 RHS2 = DAG.getNode(ISD::AND, dl, MVT::i32, RHS2, Mask);
3040 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
3041 ARMcc = DAG.getConstant(CondCode, MVT::i32);
3042 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue);
3043 SDValue Ops[] = { Chain, ARMcc, LHS1, LHS2, RHS1, RHS2, Dest };
3044 return DAG.getNode(ARMISD::BCC_i64, dl, VTList, Ops, 7);
3050 SDValue ARMTargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) const {
3051 SDValue Chain = Op.getOperand(0);
3052 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
3053 SDValue LHS = Op.getOperand(2);
3054 SDValue RHS = Op.getOperand(3);
3055 SDValue Dest = Op.getOperand(4);
3056 DebugLoc dl = Op.getDebugLoc();
3058 if (LHS.getValueType() == MVT::i32) {
3060 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
3061 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3062 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
3063 Chain, Dest, ARMcc, CCR, Cmp);
3066 assert(LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64);
3068 if (getTargetMachine().Options.UnsafeFPMath &&
3069 (CC == ISD::SETEQ || CC == ISD::SETOEQ ||
3070 CC == ISD::SETNE || CC == ISD::SETUNE)) {
3071 SDValue Result = OptimizeVFPBrcond(Op, DAG);
3072 if (Result.getNode())
3076 ARMCC::CondCodes CondCode, CondCode2;
3077 FPCCToARMCC(CC, CondCode, CondCode2);
3079 SDValue ARMcc = DAG.getConstant(CondCode, MVT::i32);
3080 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
3081 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3082 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue);
3083 SDValue Ops[] = { Chain, Dest, ARMcc, CCR, Cmp };
3084 SDValue Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops, 5);
3085 if (CondCode2 != ARMCC::AL) {
3086 ARMcc = DAG.getConstant(CondCode2, MVT::i32);
3087 SDValue Ops[] = { Res, Dest, ARMcc, CCR, Res.getValue(1) };
3088 Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops, 5);
3093 SDValue ARMTargetLowering::LowerBR_JT(SDValue Op, SelectionDAG &DAG) const {
3094 SDValue Chain = Op.getOperand(0);
3095 SDValue Table = Op.getOperand(1);
3096 SDValue Index = Op.getOperand(2);
3097 DebugLoc dl = Op.getDebugLoc();
3099 EVT PTy = getPointerTy();
3100 JumpTableSDNode *JT = cast<JumpTableSDNode>(Table);
3101 ARMFunctionInfo *AFI = DAG.getMachineFunction().getInfo<ARMFunctionInfo>();
3102 SDValue UId = DAG.getConstant(AFI->createJumpTableUId(), PTy);
3103 SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PTy);
3104 Table = DAG.getNode(ARMISD::WrapperJT, dl, MVT::i32, JTI, UId);
3105 Index = DAG.getNode(ISD::MUL, dl, PTy, Index, DAG.getConstant(4, PTy));
3106 SDValue Addr = DAG.getNode(ISD::ADD, dl, PTy, Index, Table);
3107 if (Subtarget->isThumb2()) {
3108 // Thumb2 uses a two-level jump. That is, it jumps into the jump table
3109 // which does another jump to the destination. This also makes it easier
3110 // to translate it to TBB / TBH later.
3111 // FIXME: This might not work if the function is extremely large.
3112 return DAG.getNode(ARMISD::BR2_JT, dl, MVT::Other, Chain,
3113 Addr, Op.getOperand(2), JTI, UId);
3115 if (getTargetMachine().getRelocationModel() == Reloc::PIC_) {
3116 Addr = DAG.getLoad((EVT)MVT::i32, dl, Chain, Addr,
3117 MachinePointerInfo::getJumpTable(),
3118 false, false, false, 0);
3119 Chain = Addr.getValue(1);
3120 Addr = DAG.getNode(ISD::ADD, dl, PTy, Addr, Table);
3121 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
3123 Addr = DAG.getLoad(PTy, dl, Chain, Addr,
3124 MachinePointerInfo::getJumpTable(),
3125 false, false, false, 0);
3126 Chain = Addr.getValue(1);
3127 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
3131 static SDValue LowerVectorFP_TO_INT(SDValue Op, SelectionDAG &DAG) {
3132 EVT VT = Op.getValueType();
3133 DebugLoc dl = Op.getDebugLoc();
3135 if (Op.getValueType().getVectorElementType() == MVT::i32) {
3136 if (Op.getOperand(0).getValueType().getVectorElementType() == MVT::f32)
3138 return DAG.UnrollVectorOp(Op.getNode());
3141 assert(Op.getOperand(0).getValueType() == MVT::v4f32 &&
3142 "Invalid type for custom lowering!");
3143 if (VT != MVT::v4i16)
3144 return DAG.UnrollVectorOp(Op.getNode());
3146 Op = DAG.getNode(Op.getOpcode(), dl, MVT::v4i32, Op.getOperand(0));
3147 return DAG.getNode(ISD::TRUNCATE, dl, VT, Op);
3150 static SDValue LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG) {
3151 EVT VT = Op.getValueType();
3153 return LowerVectorFP_TO_INT(Op, DAG);
3155 DebugLoc dl = Op.getDebugLoc();
3158 switch (Op.getOpcode()) {
3159 default: llvm_unreachable("Invalid opcode!");
3160 case ISD::FP_TO_SINT:
3161 Opc = ARMISD::FTOSI;
3163 case ISD::FP_TO_UINT:
3164 Opc = ARMISD::FTOUI;
3167 Op = DAG.getNode(Opc, dl, MVT::f32, Op.getOperand(0));
3168 return DAG.getNode(ISD::BITCAST, dl, MVT::i32, Op);
3171 static SDValue LowerVectorINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
3172 EVT VT = Op.getValueType();
3173 DebugLoc dl = Op.getDebugLoc();
3175 if (Op.getOperand(0).getValueType().getVectorElementType() == MVT::i32) {
3176 if (VT.getVectorElementType() == MVT::f32)
3178 return DAG.UnrollVectorOp(Op.getNode());
3181 assert(Op.getOperand(0).getValueType() == MVT::v4i16 &&
3182 "Invalid type for custom lowering!");
3183 if (VT != MVT::v4f32)
3184 return DAG.UnrollVectorOp(Op.getNode());
3188 switch (Op.getOpcode()) {
3189 default: llvm_unreachable("Invalid opcode!");
3190 case ISD::SINT_TO_FP:
3191 CastOpc = ISD::SIGN_EXTEND;
3192 Opc = ISD::SINT_TO_FP;
3194 case ISD::UINT_TO_FP:
3195 CastOpc = ISD::ZERO_EXTEND;
3196 Opc = ISD::UINT_TO_FP;
3200 Op = DAG.getNode(CastOpc, dl, MVT::v4i32, Op.getOperand(0));
3201 return DAG.getNode(Opc, dl, VT, Op);
3204 static SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
3205 EVT VT = Op.getValueType();
3207 return LowerVectorINT_TO_FP(Op, DAG);
3209 DebugLoc dl = Op.getDebugLoc();
3212 switch (Op.getOpcode()) {
3213 default: llvm_unreachable("Invalid opcode!");
3214 case ISD::SINT_TO_FP:
3215 Opc = ARMISD::SITOF;
3217 case ISD::UINT_TO_FP:
3218 Opc = ARMISD::UITOF;
3222 Op = DAG.getNode(ISD::BITCAST, dl, MVT::f32, Op.getOperand(0));
3223 return DAG.getNode(Opc, dl, VT, Op);
3226 SDValue ARMTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
3227 // Implement fcopysign with a fabs and a conditional fneg.
3228 SDValue Tmp0 = Op.getOperand(0);
3229 SDValue Tmp1 = Op.getOperand(1);
3230 DebugLoc dl = Op.getDebugLoc();
3231 EVT VT = Op.getValueType();
3232 EVT SrcVT = Tmp1.getValueType();
3233 bool InGPR = Tmp0.getOpcode() == ISD::BITCAST ||
3234 Tmp0.getOpcode() == ARMISD::VMOVDRR;
3235 bool UseNEON = !InGPR && Subtarget->hasNEON();
3238 // Use VBSL to copy the sign bit.
3239 unsigned EncodedVal = ARM_AM::createNEONModImm(0x6, 0x80);
3240 SDValue Mask = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v2i32,
3241 DAG.getTargetConstant(EncodedVal, MVT::i32));
3242 EVT OpVT = (VT == MVT::f32) ? MVT::v2i32 : MVT::v1i64;
3244 Mask = DAG.getNode(ARMISD::VSHL, dl, OpVT,
3245 DAG.getNode(ISD::BITCAST, dl, OpVT, Mask),
3246 DAG.getConstant(32, MVT::i32));
3247 else /*if (VT == MVT::f32)*/
3248 Tmp0 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp0);
3249 if (SrcVT == MVT::f32) {
3250 Tmp1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp1);
3252 Tmp1 = DAG.getNode(ARMISD::VSHL, dl, OpVT,
3253 DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1),
3254 DAG.getConstant(32, MVT::i32));
3255 } else if (VT == MVT::f32)
3256 Tmp1 = DAG.getNode(ARMISD::VSHRu, dl, MVT::v1i64,
3257 DAG.getNode(ISD::BITCAST, dl, MVT::v1i64, Tmp1),
3258 DAG.getConstant(32, MVT::i32));
3259 Tmp0 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp0);
3260 Tmp1 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1);
3262 SDValue AllOnes = DAG.getTargetConstant(ARM_AM::createNEONModImm(0xe, 0xff),
3264 AllOnes = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v8i8, AllOnes);
3265 SDValue MaskNot = DAG.getNode(ISD::XOR, dl, OpVT, Mask,
3266 DAG.getNode(ISD::BITCAST, dl, OpVT, AllOnes));
3268 SDValue Res = DAG.getNode(ISD::OR, dl, OpVT,
3269 DAG.getNode(ISD::AND, dl, OpVT, Tmp1, Mask),
3270 DAG.getNode(ISD::AND, dl, OpVT, Tmp0, MaskNot));
3271 if (VT == MVT::f32) {
3272 Res = DAG.getNode(ISD::BITCAST, dl, MVT::v2f32, Res);
3273 Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, Res,
3274 DAG.getConstant(0, MVT::i32));
3276 Res = DAG.getNode(ISD::BITCAST, dl, MVT::f64, Res);
3282 // Bitcast operand 1 to i32.
3283 if (SrcVT == MVT::f64)
3284 Tmp1 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32),
3285 &Tmp1, 1).getValue(1);
3286 Tmp1 = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp1);
3288 // Or in the signbit with integer operations.
3289 SDValue Mask1 = DAG.getConstant(0x80000000, MVT::i32);
3290 SDValue Mask2 = DAG.getConstant(0x7fffffff, MVT::i32);
3291 Tmp1 = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp1, Mask1);
3292 if (VT == MVT::f32) {
3293 Tmp0 = DAG.getNode(ISD::AND, dl, MVT::i32,
3294 DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp0), Mask2);
3295 return DAG.getNode(ISD::BITCAST, dl, MVT::f32,
3296 DAG.getNode(ISD::OR, dl, MVT::i32, Tmp0, Tmp1));
3299 // f64: Or the high part with signbit and then combine two parts.
3300 Tmp0 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32),
3302 SDValue Lo = Tmp0.getValue(0);
3303 SDValue Hi = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp0.getValue(1), Mask2);
3304 Hi = DAG.getNode(ISD::OR, dl, MVT::i32, Hi, Tmp1);
3305 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
3308 SDValue ARMTargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const{
3309 MachineFunction &MF = DAG.getMachineFunction();
3310 MachineFrameInfo *MFI = MF.getFrameInfo();
3311 MFI->setReturnAddressIsTaken(true);
3313 EVT VT = Op.getValueType();
3314 DebugLoc dl = Op.getDebugLoc();
3315 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
3317 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
3318 SDValue Offset = DAG.getConstant(4, MVT::i32);
3319 return DAG.getLoad(VT, dl, DAG.getEntryNode(),
3320 DAG.getNode(ISD::ADD, dl, VT, FrameAddr, Offset),
3321 MachinePointerInfo(), false, false, false, 0);
3324 // Return LR, which contains the return address. Mark it an implicit live-in.
3325 unsigned Reg = MF.addLiveIn(ARM::LR, getRegClassFor(MVT::i32));
3326 return DAG.getCopyFromReg(DAG.getEntryNode(), dl, Reg, VT);
3329 SDValue ARMTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
3330 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
3331 MFI->setFrameAddressIsTaken(true);
3333 EVT VT = Op.getValueType();
3334 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
3335 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
3336 unsigned FrameReg = (Subtarget->isThumb() || Subtarget->isTargetDarwin())
3337 ? ARM::R7 : ARM::R11;
3338 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
3340 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
3341 MachinePointerInfo(),
3342 false, false, false, 0);
3346 /// ExpandBITCAST - If the target supports VFP, this function is called to
3347 /// expand a bit convert where either the source or destination type is i64 to
3348 /// use a VMOVDRR or VMOVRRD node. This should not be done when the non-i64
3349 /// operand type is illegal (e.g., v2f32 for a target that doesn't support
3350 /// vectors), since the legalizer won't know what to do with that.
3351 static SDValue ExpandBITCAST(SDNode *N, SelectionDAG &DAG) {
3352 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
3353 DebugLoc dl = N->getDebugLoc();
3354 SDValue Op = N->getOperand(0);
3356 // This function is only supposed to be called for i64 types, either as the
3357 // source or destination of the bit convert.
3358 EVT SrcVT = Op.getValueType();
3359 EVT DstVT = N->getValueType(0);
3360 assert((SrcVT == MVT::i64 || DstVT == MVT::i64) &&
3361 "ExpandBITCAST called for non-i64 type");
3363 // Turn i64->f64 into VMOVDRR.
3364 if (SrcVT == MVT::i64 && TLI.isTypeLegal(DstVT)) {
3365 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
3366 DAG.getConstant(0, MVT::i32));
3367 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
3368 DAG.getConstant(1, MVT::i32));
3369 return DAG.getNode(ISD::BITCAST, dl, DstVT,
3370 DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi));
3373 // Turn f64->i64 into VMOVRRD.
3374 if (DstVT == MVT::i64 && TLI.isTypeLegal(SrcVT)) {
3375 SDValue Cvt = DAG.getNode(ARMISD::VMOVRRD, dl,
3376 DAG.getVTList(MVT::i32, MVT::i32), &Op, 1);
3377 // Merge the pieces into a single i64 value.
3378 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Cvt, Cvt.getValue(1));
3384 /// getZeroVector - Returns a vector of specified type with all zero elements.
3385 /// Zero vectors are used to represent vector negation and in those cases
3386 /// will be implemented with the NEON VNEG instruction. However, VNEG does
3387 /// not support i64 elements, so sometimes the zero vectors will need to be
3388 /// explicitly constructed. Regardless, use a canonical VMOV to create the
3390 static SDValue getZeroVector(EVT VT, SelectionDAG &DAG, DebugLoc dl) {
3391 assert(VT.isVector() && "Expected a vector type");
3392 // The canonical modified immediate encoding of a zero vector is....0!
3393 SDValue EncodedVal = DAG.getTargetConstant(0, MVT::i32);
3394 EVT VmovVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32;
3395 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, EncodedVal);
3396 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
3399 /// LowerShiftRightParts - Lower SRA_PARTS, which returns two
3400 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
3401 SDValue ARMTargetLowering::LowerShiftRightParts(SDValue Op,
3402 SelectionDAG &DAG) const {
3403 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
3404 EVT VT = Op.getValueType();
3405 unsigned VTBits = VT.getSizeInBits();
3406 DebugLoc dl = Op.getDebugLoc();
3407 SDValue ShOpLo = Op.getOperand(0);
3408 SDValue ShOpHi = Op.getOperand(1);
3409 SDValue ShAmt = Op.getOperand(2);
3411 unsigned Opc = (Op.getOpcode() == ISD::SRA_PARTS) ? ISD::SRA : ISD::SRL;
3413 assert(Op.getOpcode() == ISD::SRA_PARTS || Op.getOpcode() == ISD::SRL_PARTS);
3415 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
3416 DAG.getConstant(VTBits, MVT::i32), ShAmt);
3417 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, ShAmt);
3418 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
3419 DAG.getConstant(VTBits, MVT::i32));
3420 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, RevShAmt);
3421 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
3422 SDValue TrueVal = DAG.getNode(Opc, dl, VT, ShOpHi, ExtraShAmt);
3424 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3425 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
3427 SDValue Hi = DAG.getNode(Opc, dl, VT, ShOpHi, ShAmt);
3428 SDValue Lo = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc,
3431 SDValue Ops[2] = { Lo, Hi };
3432 return DAG.getMergeValues(Ops, 2, dl);
3435 /// LowerShiftLeftParts - Lower SHL_PARTS, which returns two
3436 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
3437 SDValue ARMTargetLowering::LowerShiftLeftParts(SDValue Op,
3438 SelectionDAG &DAG) const {
3439 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
3440 EVT VT = Op.getValueType();
3441 unsigned VTBits = VT.getSizeInBits();
3442 DebugLoc dl = Op.getDebugLoc();
3443 SDValue ShOpLo = Op.getOperand(0);
3444 SDValue ShOpHi = Op.getOperand(1);
3445 SDValue ShAmt = Op.getOperand(2);
3448 assert(Op.getOpcode() == ISD::SHL_PARTS);
3449 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
3450 DAG.getConstant(VTBits, MVT::i32), ShAmt);
3451 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, RevShAmt);
3452 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
3453 DAG.getConstant(VTBits, MVT::i32));
3454 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, ShAmt);
3455 SDValue Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ExtraShAmt);
3457 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
3458 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3459 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
3461 SDValue Lo = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
3462 SDValue Hi = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, Tmp3, ARMcc,
3465 SDValue Ops[2] = { Lo, Hi };
3466 return DAG.getMergeValues(Ops, 2, dl);
3469 SDValue ARMTargetLowering::LowerFLT_ROUNDS_(SDValue Op,
3470 SelectionDAG &DAG) const {
3471 // The rounding mode is in bits 23:22 of the FPSCR.
3472 // The ARM rounding mode value to FLT_ROUNDS mapping is 0->1, 1->2, 2->3, 3->0
3473 // The formula we use to implement this is (((FPSCR + 1 << 22) >> 22) & 3)
3474 // so that the shift + and get folded into a bitfield extract.
3475 DebugLoc dl = Op.getDebugLoc();
3476 SDValue FPSCR = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::i32,
3477 DAG.getConstant(Intrinsic::arm_get_fpscr,
3479 SDValue FltRounds = DAG.getNode(ISD::ADD, dl, MVT::i32, FPSCR,
3480 DAG.getConstant(1U << 22, MVT::i32));
3481 SDValue RMODE = DAG.getNode(ISD::SRL, dl, MVT::i32, FltRounds,
3482 DAG.getConstant(22, MVT::i32));
3483 return DAG.getNode(ISD::AND, dl, MVT::i32, RMODE,
3484 DAG.getConstant(3, MVT::i32));
3487 static SDValue LowerCTTZ(SDNode *N, SelectionDAG &DAG,
3488 const ARMSubtarget *ST) {
3489 EVT VT = N->getValueType(0);
3490 DebugLoc dl = N->getDebugLoc();
3492 if (!ST->hasV6T2Ops())
3495 SDValue rbit = DAG.getNode(ARMISD::RBIT, dl, VT, N->getOperand(0));
3496 return DAG.getNode(ISD::CTLZ, dl, VT, rbit);
3499 static SDValue LowerShift(SDNode *N, SelectionDAG &DAG,
3500 const ARMSubtarget *ST) {
3501 EVT VT = N->getValueType(0);
3502 DebugLoc dl = N->getDebugLoc();
3507 // Lower vector shifts on NEON to use VSHL.
3508 assert(ST->hasNEON() && "unexpected vector shift");
3510 // Left shifts translate directly to the vshiftu intrinsic.
3511 if (N->getOpcode() == ISD::SHL)
3512 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
3513 DAG.getConstant(Intrinsic::arm_neon_vshiftu, MVT::i32),
3514 N->getOperand(0), N->getOperand(1));
3516 assert((N->getOpcode() == ISD::SRA ||
3517 N->getOpcode() == ISD::SRL) && "unexpected vector shift opcode");
3519 // NEON uses the same intrinsics for both left and right shifts. For
3520 // right shifts, the shift amounts are negative, so negate the vector of
3522 EVT ShiftVT = N->getOperand(1).getValueType();
3523 SDValue NegatedCount = DAG.getNode(ISD::SUB, dl, ShiftVT,
3524 getZeroVector(ShiftVT, DAG, dl),
3526 Intrinsic::ID vshiftInt = (N->getOpcode() == ISD::SRA ?
3527 Intrinsic::arm_neon_vshifts :
3528 Intrinsic::arm_neon_vshiftu);
3529 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
3530 DAG.getConstant(vshiftInt, MVT::i32),
3531 N->getOperand(0), NegatedCount);
3534 static SDValue Expand64BitShift(SDNode *N, SelectionDAG &DAG,
3535 const ARMSubtarget *ST) {
3536 EVT VT = N->getValueType(0);
3537 DebugLoc dl = N->getDebugLoc();
3539 // We can get here for a node like i32 = ISD::SHL i32, i64
3543 assert((N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA) &&
3544 "Unknown shift to lower!");
3546 // We only lower SRA, SRL of 1 here, all others use generic lowering.
3547 if (!isa<ConstantSDNode>(N->getOperand(1)) ||
3548 cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() != 1)
3551 // If we are in thumb mode, we don't have RRX.
3552 if (ST->isThumb1Only()) return SDValue();
3554 // Okay, we have a 64-bit SRA or SRL of 1. Lower this to an RRX expr.
3555 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
3556 DAG.getConstant(0, MVT::i32));
3557 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
3558 DAG.getConstant(1, MVT::i32));
3560 // First, build a SRA_FLAG/SRL_FLAG op, which shifts the top part by one and
3561 // captures the result into a carry flag.
3562 unsigned Opc = N->getOpcode() == ISD::SRL ? ARMISD::SRL_FLAG:ARMISD::SRA_FLAG;
3563 Hi = DAG.getNode(Opc, dl, DAG.getVTList(MVT::i32, MVT::Glue), &Hi, 1);
3565 // The low part is an ARMISD::RRX operand, which shifts the carry in.
3566 Lo = DAG.getNode(ARMISD::RRX, dl, MVT::i32, Lo, Hi.getValue(1));
3568 // Merge the pieces into a single i64 value.
3569 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi);
3572 static SDValue LowerVSETCC(SDValue Op, SelectionDAG &DAG) {
3573 SDValue TmpOp0, TmpOp1;
3574 bool Invert = false;
3578 SDValue Op0 = Op.getOperand(0);
3579 SDValue Op1 = Op.getOperand(1);
3580 SDValue CC = Op.getOperand(2);
3581 EVT VT = Op.getValueType();
3582 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
3583 DebugLoc dl = Op.getDebugLoc();
3585 if (Op.getOperand(1).getValueType().isFloatingPoint()) {
3586 switch (SetCCOpcode) {
3587 default: llvm_unreachable("Illegal FP comparison");
3589 case ISD::SETNE: Invert = true; // Fallthrough
3591 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
3593 case ISD::SETLT: Swap = true; // Fallthrough
3595 case ISD::SETGT: Opc = ARMISD::VCGT; break;
3597 case ISD::SETLE: Swap = true; // Fallthrough
3599 case ISD::SETGE: Opc = ARMISD::VCGE; break;
3600 case ISD::SETUGE: Swap = true; // Fallthrough
3601 case ISD::SETULE: Invert = true; Opc = ARMISD::VCGT; break;
3602 case ISD::SETUGT: Swap = true; // Fallthrough
3603 case ISD::SETULT: Invert = true; Opc = ARMISD::VCGE; break;
3604 case ISD::SETUEQ: Invert = true; // Fallthrough
3606 // Expand this to (OLT | OGT).
3610 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
3611 Op1 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp0, TmpOp1);
3613 case ISD::SETUO: Invert = true; // Fallthrough
3615 // Expand this to (OLT | OGE).
3619 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
3620 Op1 = DAG.getNode(ARMISD::VCGE, dl, VT, TmpOp0, TmpOp1);
3624 // Integer comparisons.
3625 switch (SetCCOpcode) {
3626 default: llvm_unreachable("Illegal integer comparison");
3627 case ISD::SETNE: Invert = true;
3628 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
3629 case ISD::SETLT: Swap = true;
3630 case ISD::SETGT: Opc = ARMISD::VCGT; break;
3631 case ISD::SETLE: Swap = true;
3632 case ISD::SETGE: Opc = ARMISD::VCGE; break;
3633 case ISD::SETULT: Swap = true;
3634 case ISD::SETUGT: Opc = ARMISD::VCGTU; break;
3635 case ISD::SETULE: Swap = true;
3636 case ISD::SETUGE: Opc = ARMISD::VCGEU; break;
3639 // Detect VTST (Vector Test Bits) = icmp ne (and (op0, op1), zero).
3640 if (Opc == ARMISD::VCEQ) {
3643 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
3645 else if (ISD::isBuildVectorAllZeros(Op0.getNode()))
3648 // Ignore bitconvert.
3649 if (AndOp.getNode() && AndOp.getOpcode() == ISD::BITCAST)
3650 AndOp = AndOp.getOperand(0);
3652 if (AndOp.getNode() && AndOp.getOpcode() == ISD::AND) {
3654 Op0 = DAG.getNode(ISD::BITCAST, dl, VT, AndOp.getOperand(0));
3655 Op1 = DAG.getNode(ISD::BITCAST, dl, VT, AndOp.getOperand(1));
3662 std::swap(Op0, Op1);
3664 // If one of the operands is a constant vector zero, attempt to fold the
3665 // comparison to a specialized compare-against-zero form.
3667 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
3669 else if (ISD::isBuildVectorAllZeros(Op0.getNode())) {
3670 if (Opc == ARMISD::VCGE)
3671 Opc = ARMISD::VCLEZ;
3672 else if (Opc == ARMISD::VCGT)
3673 Opc = ARMISD::VCLTZ;
3678 if (SingleOp.getNode()) {
3681 Result = DAG.getNode(ARMISD::VCEQZ, dl, VT, SingleOp); break;
3683 Result = DAG.getNode(ARMISD::VCGEZ, dl, VT, SingleOp); break;
3685 Result = DAG.getNode(ARMISD::VCLEZ, dl, VT, SingleOp); break;
3687 Result = DAG.getNode(ARMISD::VCGTZ, dl, VT, SingleOp); break;
3689 Result = DAG.getNode(ARMISD::VCLTZ, dl, VT, SingleOp); break;
3691 Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
3694 Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
3698 Result = DAG.getNOT(dl, Result, VT);
3703 /// isNEONModifiedImm - Check if the specified splat value corresponds to a
3704 /// valid vector constant for a NEON instruction with a "modified immediate"
3705 /// operand (e.g., VMOV). If so, return the encoded value.
3706 static SDValue isNEONModifiedImm(uint64_t SplatBits, uint64_t SplatUndef,
3707 unsigned SplatBitSize, SelectionDAG &DAG,
3708 EVT &VT, bool is128Bits, NEONModImmType type) {
3709 unsigned OpCmode, Imm;
3711 // SplatBitSize is set to the smallest size that splats the vector, so a
3712 // zero vector will always have SplatBitSize == 8. However, NEON modified
3713 // immediate instructions others than VMOV do not support the 8-bit encoding
3714 // of a zero vector, and the default encoding of zero is supposed to be the
3719 switch (SplatBitSize) {
3721 if (type != VMOVModImm)
3723 // Any 1-byte value is OK. Op=0, Cmode=1110.
3724 assert((SplatBits & ~0xff) == 0 && "one byte splat value is too big");
3727 VT = is128Bits ? MVT::v16i8 : MVT::v8i8;
3731 // NEON's 16-bit VMOV supports splat values where only one byte is nonzero.
3732 VT = is128Bits ? MVT::v8i16 : MVT::v4i16;
3733 if ((SplatBits & ~0xff) == 0) {
3734 // Value = 0x00nn: Op=x, Cmode=100x.
3739 if ((SplatBits & ~0xff00) == 0) {
3740 // Value = 0xnn00: Op=x, Cmode=101x.
3742 Imm = SplatBits >> 8;
3748 // NEON's 32-bit VMOV supports splat values where:
3749 // * only one byte is nonzero, or
3750 // * the least significant byte is 0xff and the second byte is nonzero, or
3751 // * the least significant 2 bytes are 0xff and the third is nonzero.
3752 VT = is128Bits ? MVT::v4i32 : MVT::v2i32;
3753 if ((SplatBits & ~0xff) == 0) {
3754 // Value = 0x000000nn: Op=x, Cmode=000x.
3759 if ((SplatBits & ~0xff00) == 0) {
3760 // Value = 0x0000nn00: Op=x, Cmode=001x.
3762 Imm = SplatBits >> 8;
3765 if ((SplatBits & ~0xff0000) == 0) {
3766 // Value = 0x00nn0000: Op=x, Cmode=010x.
3768 Imm = SplatBits >> 16;
3771 if ((SplatBits & ~0xff000000) == 0) {
3772 // Value = 0xnn000000: Op=x, Cmode=011x.
3774 Imm = SplatBits >> 24;
3778 // cmode == 0b1100 and cmode == 0b1101 are not supported for VORR or VBIC
3779 if (type == OtherModImm) return SDValue();
3781 if ((SplatBits & ~0xffff) == 0 &&
3782 ((SplatBits | SplatUndef) & 0xff) == 0xff) {
3783 // Value = 0x0000nnff: Op=x, Cmode=1100.
3785 Imm = SplatBits >> 8;
3790 if ((SplatBits & ~0xffffff) == 0 &&
3791 ((SplatBits | SplatUndef) & 0xffff) == 0xffff) {
3792 // Value = 0x00nnffff: Op=x, Cmode=1101.
3794 Imm = SplatBits >> 16;
3795 SplatBits |= 0xffff;
3799 // Note: there are a few 32-bit splat values (specifically: 00ffff00,
3800 // ff000000, ff0000ff, and ffff00ff) that are valid for VMOV.I64 but not
3801 // VMOV.I32. A (very) minor optimization would be to replicate the value
3802 // and fall through here to test for a valid 64-bit splat. But, then the
3803 // caller would also need to check and handle the change in size.
3807 if (type != VMOVModImm)
3809 // NEON has a 64-bit VMOV splat where each byte is either 0 or 0xff.
3810 uint64_t BitMask = 0xff;
3812 unsigned ImmMask = 1;
3814 for (int ByteNum = 0; ByteNum < 8; ++ByteNum) {
3815 if (((SplatBits | SplatUndef) & BitMask) == BitMask) {
3818 } else if ((SplatBits & BitMask) != 0) {
3824 // Op=1, Cmode=1110.
3827 VT = is128Bits ? MVT::v2i64 : MVT::v1i64;
3832 llvm_unreachable("unexpected size for isNEONModifiedImm");
3835 unsigned EncodedVal = ARM_AM::createNEONModImm(OpCmode, Imm);
3836 return DAG.getTargetConstant(EncodedVal, MVT::i32);
3839 SDValue ARMTargetLowering::LowerConstantFP(SDValue Op, SelectionDAG &DAG,
3840 const ARMSubtarget *ST) const {
3841 if (!ST->useNEONForSinglePrecisionFP() || !ST->hasVFP3() || ST->hasD16())
3844 ConstantFPSDNode *CFP = cast<ConstantFPSDNode>(Op);
3845 assert(Op.getValueType() == MVT::f32 &&
3846 "ConstantFP custom lowering should only occur for f32.");
3848 // Try splatting with a VMOV.f32...
3849 APFloat FPVal = CFP->getValueAPF();
3850 int ImmVal = ARM_AM::getFP32Imm(FPVal);
3852 DebugLoc DL = Op.getDebugLoc();
3853 SDValue NewVal = DAG.getTargetConstant(ImmVal, MVT::i32);
3854 SDValue VecConstant = DAG.getNode(ARMISD::VMOVFPIMM, DL, MVT::v2f32,
3856 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, VecConstant,
3857 DAG.getConstant(0, MVT::i32));
3860 // If that fails, try a VMOV.i32
3862 unsigned iVal = FPVal.bitcastToAPInt().getZExtValue();
3863 SDValue NewVal = isNEONModifiedImm(iVal, 0, 32, DAG, VMovVT, false,
3865 if (NewVal != SDValue()) {
3866 DebugLoc DL = Op.getDebugLoc();
3867 SDValue VecConstant = DAG.getNode(ARMISD::VMOVIMM, DL, VMovVT,
3869 SDValue VecFConstant = DAG.getNode(ISD::BITCAST, DL, MVT::v2f32,
3871 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, VecFConstant,
3872 DAG.getConstant(0, MVT::i32));
3875 // Finally, try a VMVN.i32
3876 NewVal = isNEONModifiedImm(~iVal & 0xffffffff, 0, 32, DAG, VMovVT, false,
3878 if (NewVal != SDValue()) {
3879 DebugLoc DL = Op.getDebugLoc();
3880 SDValue VecConstant = DAG.getNode(ARMISD::VMVNIMM, DL, VMovVT, NewVal);
3881 SDValue VecFConstant = DAG.getNode(ISD::BITCAST, DL, MVT::v2f32,
3883 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, VecFConstant,
3884 DAG.getConstant(0, MVT::i32));
3891 static bool isVEXTMask(ArrayRef<int> M, EVT VT,
3892 bool &ReverseVEXT, unsigned &Imm) {
3893 unsigned NumElts = VT.getVectorNumElements();
3894 ReverseVEXT = false;
3896 // Assume that the first shuffle index is not UNDEF. Fail if it is.
3902 // If this is a VEXT shuffle, the immediate value is the index of the first
3903 // element. The other shuffle indices must be the successive elements after
3905 unsigned ExpectedElt = Imm;
3906 for (unsigned i = 1; i < NumElts; ++i) {
3907 // Increment the expected index. If it wraps around, it may still be
3908 // a VEXT but the source vectors must be swapped.
3910 if (ExpectedElt == NumElts * 2) {
3915 if (M[i] < 0) continue; // ignore UNDEF indices
3916 if (ExpectedElt != static_cast<unsigned>(M[i]))
3920 // Adjust the index value if the source operands will be swapped.
3927 /// isVREVMask - Check if a vector shuffle corresponds to a VREV
3928 /// instruction with the specified blocksize. (The order of the elements
3929 /// within each block of the vector is reversed.)
3930 static bool isVREVMask(ArrayRef<int> M, EVT VT, unsigned BlockSize) {
3931 assert((BlockSize==16 || BlockSize==32 || BlockSize==64) &&
3932 "Only possible block sizes for VREV are: 16, 32, 64");
3934 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3938 unsigned NumElts = VT.getVectorNumElements();
3939 unsigned BlockElts = M[0] + 1;
3940 // If the first shuffle index is UNDEF, be optimistic.
3942 BlockElts = BlockSize / EltSz;
3944 if (BlockSize <= EltSz || BlockSize != BlockElts * EltSz)
3947 for (unsigned i = 0; i < NumElts; ++i) {
3948 if (M[i] < 0) continue; // ignore UNDEF indices
3949 if ((unsigned) M[i] != (i - i%BlockElts) + (BlockElts - 1 - i%BlockElts))
3956 static bool isVTBLMask(ArrayRef<int> M, EVT VT) {
3957 // We can handle <8 x i8> vector shuffles. If the index in the mask is out of
3958 // range, then 0 is placed into the resulting vector. So pretty much any mask
3959 // of 8 elements can work here.
3960 return VT == MVT::v8i8 && M.size() == 8;
3963 static bool isVTRNMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
3964 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3968 unsigned NumElts = VT.getVectorNumElements();
3969 WhichResult = (M[0] == 0 ? 0 : 1);
3970 for (unsigned i = 0; i < NumElts; i += 2) {
3971 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
3972 (M[i+1] >= 0 && (unsigned) M[i+1] != i + NumElts + WhichResult))
3978 /// isVTRN_v_undef_Mask - Special case of isVTRNMask for canonical form of
3979 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
3980 /// Mask is e.g., <0, 0, 2, 2> instead of <0, 4, 2, 6>.
3981 static bool isVTRN_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
3982 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3986 unsigned NumElts = VT.getVectorNumElements();
3987 WhichResult = (M[0] == 0 ? 0 : 1);
3988 for (unsigned i = 0; i < NumElts; i += 2) {
3989 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
3990 (M[i+1] >= 0 && (unsigned) M[i+1] != i + WhichResult))
3996 static bool isVUZPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
3997 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
4001 unsigned NumElts = VT.getVectorNumElements();
4002 WhichResult = (M[0] == 0 ? 0 : 1);
4003 for (unsigned i = 0; i != NumElts; ++i) {
4004 if (M[i] < 0) continue; // ignore UNDEF indices
4005 if ((unsigned) M[i] != 2 * i + WhichResult)
4009 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
4010 if (VT.is64BitVector() && EltSz == 32)
4016 /// isVUZP_v_undef_Mask - Special case of isVUZPMask for canonical form of
4017 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
4018 /// Mask is e.g., <0, 2, 0, 2> instead of <0, 2, 4, 6>,
4019 static bool isVUZP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
4020 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
4024 unsigned Half = VT.getVectorNumElements() / 2;
4025 WhichResult = (M[0] == 0 ? 0 : 1);
4026 for (unsigned j = 0; j != 2; ++j) {
4027 unsigned Idx = WhichResult;
4028 for (unsigned i = 0; i != Half; ++i) {
4029 int MIdx = M[i + j * Half];
4030 if (MIdx >= 0 && (unsigned) MIdx != Idx)
4036 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
4037 if (VT.is64BitVector() && EltSz == 32)
4043 static bool isVZIPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
4044 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
4048 unsigned NumElts = VT.getVectorNumElements();
4049 WhichResult = (M[0] == 0 ? 0 : 1);
4050 unsigned Idx = WhichResult * NumElts / 2;
4051 for (unsigned i = 0; i != NumElts; i += 2) {
4052 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
4053 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx + NumElts))
4058 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
4059 if (VT.is64BitVector() && EltSz == 32)
4065 /// isVZIP_v_undef_Mask - Special case of isVZIPMask for canonical form of
4066 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
4067 /// Mask is e.g., <0, 0, 1, 1> instead of <0, 4, 1, 5>.
4068 static bool isVZIP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
4069 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
4073 unsigned NumElts = VT.getVectorNumElements();
4074 WhichResult = (M[0] == 0 ? 0 : 1);
4075 unsigned Idx = WhichResult * NumElts / 2;
4076 for (unsigned i = 0; i != NumElts; i += 2) {
4077 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
4078 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx))
4083 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
4084 if (VT.is64BitVector() && EltSz == 32)
4090 // If N is an integer constant that can be moved into a register in one
4091 // instruction, return an SDValue of such a constant (will become a MOV
4092 // instruction). Otherwise return null.
4093 static SDValue IsSingleInstrConstant(SDValue N, SelectionDAG &DAG,
4094 const ARMSubtarget *ST, DebugLoc dl) {
4096 if (!isa<ConstantSDNode>(N))
4098 Val = cast<ConstantSDNode>(N)->getZExtValue();
4100 if (ST->isThumb1Only()) {
4101 if (Val <= 255 || ~Val <= 255)
4102 return DAG.getConstant(Val, MVT::i32);
4104 if (ARM_AM::getSOImmVal(Val) != -1 || ARM_AM::getSOImmVal(~Val) != -1)
4105 return DAG.getConstant(Val, MVT::i32);
4110 // If this is a case we can't handle, return null and let the default
4111 // expansion code take care of it.
4112 SDValue ARMTargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG,
4113 const ARMSubtarget *ST) const {
4114 BuildVectorSDNode *BVN = cast<BuildVectorSDNode>(Op.getNode());
4115 DebugLoc dl = Op.getDebugLoc();
4116 EVT VT = Op.getValueType();
4118 APInt SplatBits, SplatUndef;
4119 unsigned SplatBitSize;
4121 if (BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
4122 if (SplatBitSize <= 64) {
4123 // Check if an immediate VMOV works.
4125 SDValue Val = isNEONModifiedImm(SplatBits.getZExtValue(),
4126 SplatUndef.getZExtValue(), SplatBitSize,
4127 DAG, VmovVT, VT.is128BitVector(),
4129 if (Val.getNode()) {
4130 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, Val);
4131 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
4134 // Try an immediate VMVN.
4135 uint64_t NegatedImm = (~SplatBits).getZExtValue();
4136 Val = isNEONModifiedImm(NegatedImm,
4137 SplatUndef.getZExtValue(), SplatBitSize,
4138 DAG, VmovVT, VT.is128BitVector(),
4140 if (Val.getNode()) {
4141 SDValue Vmov = DAG.getNode(ARMISD::VMVNIMM, dl, VmovVT, Val);
4142 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
4145 // Use vmov.f32 to materialize other v2f32 and v4f32 splats.
4146 if ((VT == MVT::v2f32 || VT == MVT::v4f32) && SplatBitSize == 32) {
4147 int ImmVal = ARM_AM::getFP32Imm(SplatBits);
4149 SDValue Val = DAG.getTargetConstant(ImmVal, MVT::i32);
4150 return DAG.getNode(ARMISD::VMOVFPIMM, dl, VT, Val);
4156 // Scan through the operands to see if only one value is used.
4157 unsigned NumElts = VT.getVectorNumElements();
4158 bool isOnlyLowElement = true;
4159 bool usesOnlyOneValue = true;
4160 bool isConstant = true;
4162 for (unsigned i = 0; i < NumElts; ++i) {
4163 SDValue V = Op.getOperand(i);
4164 if (V.getOpcode() == ISD::UNDEF)
4167 isOnlyLowElement = false;
4168 if (!isa<ConstantFPSDNode>(V) && !isa<ConstantSDNode>(V))
4171 if (!Value.getNode())
4173 else if (V != Value)
4174 usesOnlyOneValue = false;
4177 if (!Value.getNode())
4178 return DAG.getUNDEF(VT);
4180 if (isOnlyLowElement)
4181 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Value);
4183 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4185 // Use VDUP for non-constant splats. For f32 constant splats, reduce to
4186 // i32 and try again.
4187 if (usesOnlyOneValue && EltSize <= 32) {
4189 return DAG.getNode(ARMISD::VDUP, dl, VT, Value);
4190 if (VT.getVectorElementType().isFloatingPoint()) {
4191 SmallVector<SDValue, 8> Ops;
4192 for (unsigned i = 0; i < NumElts; ++i)
4193 Ops.push_back(DAG.getNode(ISD::BITCAST, dl, MVT::i32,
4195 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, NumElts);
4196 SDValue Val = DAG.getNode(ISD::BUILD_VECTOR, dl, VecVT, &Ops[0], NumElts);
4197 Val = LowerBUILD_VECTOR(Val, DAG, ST);
4199 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
4201 SDValue Val = IsSingleInstrConstant(Value, DAG, ST, dl);
4203 return DAG.getNode(ARMISD::VDUP, dl, VT, Val);
4206 // If all elements are constants and the case above didn't get hit, fall back
4207 // to the default expansion, which will generate a load from the constant
4212 // Empirical tests suggest this is rarely worth it for vectors of length <= 2.
4214 SDValue shuffle = ReconstructShuffle(Op, DAG);
4215 if (shuffle != SDValue())
4219 // Vectors with 32- or 64-bit elements can be built by directly assigning
4220 // the subregisters. Lower it to an ARMISD::BUILD_VECTOR so the operands
4221 // will be legalized.
4222 if (EltSize >= 32) {
4223 // Do the expansion with floating-point types, since that is what the VFP
4224 // registers are defined to use, and since i64 is not legal.
4225 EVT EltVT = EVT::getFloatingPointVT(EltSize);
4226 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
4227 SmallVector<SDValue, 8> Ops;
4228 for (unsigned i = 0; i < NumElts; ++i)
4229 Ops.push_back(DAG.getNode(ISD::BITCAST, dl, EltVT, Op.getOperand(i)));
4230 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, &Ops[0],NumElts);
4231 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
4237 // Gather data to see if the operation can be modelled as a
4238 // shuffle in combination with VEXTs.
4239 SDValue ARMTargetLowering::ReconstructShuffle(SDValue Op,
4240 SelectionDAG &DAG) const {
4241 DebugLoc dl = Op.getDebugLoc();
4242 EVT VT = Op.getValueType();
4243 unsigned NumElts = VT.getVectorNumElements();
4245 SmallVector<SDValue, 2> SourceVecs;
4246 SmallVector<unsigned, 2> MinElts;
4247 SmallVector<unsigned, 2> MaxElts;
4249 for (unsigned i = 0; i < NumElts; ++i) {
4250 SDValue V = Op.getOperand(i);
4251 if (V.getOpcode() == ISD::UNDEF)
4253 else if (V.getOpcode() != ISD::EXTRACT_VECTOR_ELT) {
4254 // A shuffle can only come from building a vector from various
4255 // elements of other vectors.
4257 } else if (V.getOperand(0).getValueType().getVectorElementType() !=
4258 VT.getVectorElementType()) {
4259 // This code doesn't know how to handle shuffles where the vector
4260 // element types do not match (this happens because type legalization
4261 // promotes the return type of EXTRACT_VECTOR_ELT).
4262 // FIXME: It might be appropriate to extend this code to handle
4263 // mismatched types.
4267 // Record this extraction against the appropriate vector if possible...
4268 SDValue SourceVec = V.getOperand(0);
4269 // If the element number isn't a constant, we can't effectively
4270 // analyze what's going on.
4271 if (!isa<ConstantSDNode>(V.getOperand(1)))
4273 unsigned EltNo = cast<ConstantSDNode>(V.getOperand(1))->getZExtValue();
4274 bool FoundSource = false;
4275 for (unsigned j = 0; j < SourceVecs.size(); ++j) {
4276 if (SourceVecs[j] == SourceVec) {
4277 if (MinElts[j] > EltNo)
4279 if (MaxElts[j] < EltNo)
4286 // Or record a new source if not...
4288 SourceVecs.push_back(SourceVec);
4289 MinElts.push_back(EltNo);
4290 MaxElts.push_back(EltNo);
4294 // Currently only do something sane when at most two source vectors
4296 if (SourceVecs.size() > 2)
4299 SDValue ShuffleSrcs[2] = {DAG.getUNDEF(VT), DAG.getUNDEF(VT) };
4300 int VEXTOffsets[2] = {0, 0};
4302 // This loop extracts the usage patterns of the source vectors
4303 // and prepares appropriate SDValues for a shuffle if possible.
4304 for (unsigned i = 0; i < SourceVecs.size(); ++i) {
4305 if (SourceVecs[i].getValueType() == VT) {
4306 // No VEXT necessary
4307 ShuffleSrcs[i] = SourceVecs[i];
4310 } else if (SourceVecs[i].getValueType().getVectorNumElements() < NumElts) {
4311 // It probably isn't worth padding out a smaller vector just to
4312 // break it down again in a shuffle.
4316 // Since only 64-bit and 128-bit vectors are legal on ARM and
4317 // we've eliminated the other cases...
4318 assert(SourceVecs[i].getValueType().getVectorNumElements() == 2*NumElts &&
4319 "unexpected vector sizes in ReconstructShuffle");
4321 if (MaxElts[i] - MinElts[i] >= NumElts) {
4322 // Span too large for a VEXT to cope
4326 if (MinElts[i] >= NumElts) {
4327 // The extraction can just take the second half
4328 VEXTOffsets[i] = NumElts;
4329 ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4331 DAG.getIntPtrConstant(NumElts));
4332 } else if (MaxElts[i] < NumElts) {
4333 // The extraction can just take the first half
4335 ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4337 DAG.getIntPtrConstant(0));
4339 // An actual VEXT is needed
4340 VEXTOffsets[i] = MinElts[i];
4341 SDValue VEXTSrc1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4343 DAG.getIntPtrConstant(0));
4344 SDValue VEXTSrc2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4346 DAG.getIntPtrConstant(NumElts));
4347 ShuffleSrcs[i] = DAG.getNode(ARMISD::VEXT, dl, VT, VEXTSrc1, VEXTSrc2,
4348 DAG.getConstant(VEXTOffsets[i], MVT::i32));
4352 SmallVector<int, 8> Mask;
4354 for (unsigned i = 0; i < NumElts; ++i) {
4355 SDValue Entry = Op.getOperand(i);
4356 if (Entry.getOpcode() == ISD::UNDEF) {
4361 SDValue ExtractVec = Entry.getOperand(0);
4362 int ExtractElt = cast<ConstantSDNode>(Op.getOperand(i)
4363 .getOperand(1))->getSExtValue();
4364 if (ExtractVec == SourceVecs[0]) {
4365 Mask.push_back(ExtractElt - VEXTOffsets[0]);
4367 Mask.push_back(ExtractElt + NumElts - VEXTOffsets[1]);
4371 // Final check before we try to produce nonsense...
4372 if (isShuffleMaskLegal(Mask, VT))
4373 return DAG.getVectorShuffle(VT, dl, ShuffleSrcs[0], ShuffleSrcs[1],
4379 /// isShuffleMaskLegal - Targets can use this to indicate that they only
4380 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
4381 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
4382 /// are assumed to be legal.
4384 ARMTargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
4386 if (VT.getVectorNumElements() == 4 &&
4387 (VT.is128BitVector() || VT.is64BitVector())) {
4388 unsigned PFIndexes[4];
4389 for (unsigned i = 0; i != 4; ++i) {
4393 PFIndexes[i] = M[i];
4396 // Compute the index in the perfect shuffle table.
4397 unsigned PFTableIndex =
4398 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
4399 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
4400 unsigned Cost = (PFEntry >> 30);
4407 unsigned Imm, WhichResult;
4409 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4410 return (EltSize >= 32 ||
4411 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
4412 isVREVMask(M, VT, 64) ||
4413 isVREVMask(M, VT, 32) ||
4414 isVREVMask(M, VT, 16) ||
4415 isVEXTMask(M, VT, ReverseVEXT, Imm) ||
4416 isVTBLMask(M, VT) ||
4417 isVTRNMask(M, VT, WhichResult) ||
4418 isVUZPMask(M, VT, WhichResult) ||
4419 isVZIPMask(M, VT, WhichResult) ||
4420 isVTRN_v_undef_Mask(M, VT, WhichResult) ||
4421 isVUZP_v_undef_Mask(M, VT, WhichResult) ||
4422 isVZIP_v_undef_Mask(M, VT, WhichResult));
4425 /// GeneratePerfectShuffle - Given an entry in the perfect-shuffle table, emit
4426 /// the specified operations to build the shuffle.
4427 static SDValue GeneratePerfectShuffle(unsigned PFEntry, SDValue LHS,
4428 SDValue RHS, SelectionDAG &DAG,
4430 unsigned OpNum = (PFEntry >> 26) & 0x0F;
4431 unsigned LHSID = (PFEntry >> 13) & ((1 << 13)-1);
4432 unsigned RHSID = (PFEntry >> 0) & ((1 << 13)-1);
4435 OP_COPY = 0, // Copy, used for things like <u,u,u,3> to say it is <0,1,2,3>
4444 OP_VUZPL, // VUZP, left result
4445 OP_VUZPR, // VUZP, right result
4446 OP_VZIPL, // VZIP, left result
4447 OP_VZIPR, // VZIP, right result
4448 OP_VTRNL, // VTRN, left result
4449 OP_VTRNR // VTRN, right result
4452 if (OpNum == OP_COPY) {
4453 if (LHSID == (1*9+2)*9+3) return LHS;
4454 assert(LHSID == ((4*9+5)*9+6)*9+7 && "Illegal OP_COPY!");
4458 SDValue OpLHS, OpRHS;
4459 OpLHS = GeneratePerfectShuffle(PerfectShuffleTable[LHSID], LHS, RHS, DAG, dl);
4460 OpRHS = GeneratePerfectShuffle(PerfectShuffleTable[RHSID], LHS, RHS, DAG, dl);
4461 EVT VT = OpLHS.getValueType();
4464 default: llvm_unreachable("Unknown shuffle opcode!");
4466 // VREV divides the vector in half and swaps within the half.
4467 if (VT.getVectorElementType() == MVT::i32 ||
4468 VT.getVectorElementType() == MVT::f32)
4469 return DAG.getNode(ARMISD::VREV64, dl, VT, OpLHS);
4470 // vrev <4 x i16> -> VREV32
4471 if (VT.getVectorElementType() == MVT::i16)
4472 return DAG.getNode(ARMISD::VREV32, dl, VT, OpLHS);
4473 // vrev <4 x i8> -> VREV16
4474 assert(VT.getVectorElementType() == MVT::i8);
4475 return DAG.getNode(ARMISD::VREV16, dl, VT, OpLHS);
4480 return DAG.getNode(ARMISD::VDUPLANE, dl, VT,
4481 OpLHS, DAG.getConstant(OpNum-OP_VDUP0, MVT::i32));
4485 return DAG.getNode(ARMISD::VEXT, dl, VT,
4487 DAG.getConstant(OpNum-OP_VEXT1+1, MVT::i32));
4490 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
4491 OpLHS, OpRHS).getValue(OpNum-OP_VUZPL);
4494 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
4495 OpLHS, OpRHS).getValue(OpNum-OP_VZIPL);
4498 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
4499 OpLHS, OpRHS).getValue(OpNum-OP_VTRNL);
4503 static SDValue LowerVECTOR_SHUFFLEv8i8(SDValue Op,
4504 ArrayRef<int> ShuffleMask,
4505 SelectionDAG &DAG) {
4506 // Check to see if we can use the VTBL instruction.
4507 SDValue V1 = Op.getOperand(0);
4508 SDValue V2 = Op.getOperand(1);
4509 DebugLoc DL = Op.getDebugLoc();
4511 SmallVector<SDValue, 8> VTBLMask;
4512 for (ArrayRef<int>::iterator
4513 I = ShuffleMask.begin(), E = ShuffleMask.end(); I != E; ++I)
4514 VTBLMask.push_back(DAG.getConstant(*I, MVT::i32));
4516 if (V2.getNode()->getOpcode() == ISD::UNDEF)
4517 return DAG.getNode(ARMISD::VTBL1, DL, MVT::v8i8, V1,
4518 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8,
4521 return DAG.getNode(ARMISD::VTBL2, DL, MVT::v8i8, V1, V2,
4522 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8,
4526 static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
4527 SDValue V1 = Op.getOperand(0);
4528 SDValue V2 = Op.getOperand(1);
4529 DebugLoc dl = Op.getDebugLoc();
4530 EVT VT = Op.getValueType();
4531 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op.getNode());
4533 // Convert shuffles that are directly supported on NEON to target-specific
4534 // DAG nodes, instead of keeping them as shuffles and matching them again
4535 // during code selection. This is more efficient and avoids the possibility
4536 // of inconsistencies between legalization and selection.
4537 // FIXME: floating-point vectors should be canonicalized to integer vectors
4538 // of the same time so that they get CSEd properly.
4539 ArrayRef<int> ShuffleMask = SVN->getMask();
4541 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4542 if (EltSize <= 32) {
4543 if (ShuffleVectorSDNode::isSplatMask(&ShuffleMask[0], VT)) {
4544 int Lane = SVN->getSplatIndex();
4545 // If this is undef splat, generate it via "just" vdup, if possible.
4546 if (Lane == -1) Lane = 0;
4548 // Test if V1 is a SCALAR_TO_VECTOR.
4549 if (Lane == 0 && V1.getOpcode() == ISD::SCALAR_TO_VECTOR) {
4550 return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
4552 // Test if V1 is a BUILD_VECTOR which is equivalent to a SCALAR_TO_VECTOR
4553 // (and probably will turn into a SCALAR_TO_VECTOR once legalization
4555 if (Lane == 0 && V1.getOpcode() == ISD::BUILD_VECTOR &&
4556 !isa<ConstantSDNode>(V1.getOperand(0))) {
4557 bool IsScalarToVector = true;
4558 for (unsigned i = 1, e = V1.getNumOperands(); i != e; ++i)
4559 if (V1.getOperand(i).getOpcode() != ISD::UNDEF) {
4560 IsScalarToVector = false;
4563 if (IsScalarToVector)
4564 return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
4566 return DAG.getNode(ARMISD::VDUPLANE, dl, VT, V1,
4567 DAG.getConstant(Lane, MVT::i32));
4572 if (isVEXTMask(ShuffleMask, VT, ReverseVEXT, Imm)) {
4575 return DAG.getNode(ARMISD::VEXT, dl, VT, V1, V2,
4576 DAG.getConstant(Imm, MVT::i32));
4579 if (isVREVMask(ShuffleMask, VT, 64))
4580 return DAG.getNode(ARMISD::VREV64, dl, VT, V1);
4581 if (isVREVMask(ShuffleMask, VT, 32))
4582 return DAG.getNode(ARMISD::VREV32, dl, VT, V1);
4583 if (isVREVMask(ShuffleMask, VT, 16))
4584 return DAG.getNode(ARMISD::VREV16, dl, VT, V1);
4586 // Check for Neon shuffles that modify both input vectors in place.
4587 // If both results are used, i.e., if there are two shuffles with the same
4588 // source operands and with masks corresponding to both results of one of
4589 // these operations, DAG memoization will ensure that a single node is
4590 // used for both shuffles.
4591 unsigned WhichResult;
4592 if (isVTRNMask(ShuffleMask, VT, WhichResult))
4593 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
4594 V1, V2).getValue(WhichResult);
4595 if (isVUZPMask(ShuffleMask, VT, WhichResult))
4596 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
4597 V1, V2).getValue(WhichResult);
4598 if (isVZIPMask(ShuffleMask, VT, WhichResult))
4599 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
4600 V1, V2).getValue(WhichResult);
4602 if (isVTRN_v_undef_Mask(ShuffleMask, VT, WhichResult))
4603 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
4604 V1, V1).getValue(WhichResult);
4605 if (isVUZP_v_undef_Mask(ShuffleMask, VT, WhichResult))
4606 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
4607 V1, V1).getValue(WhichResult);
4608 if (isVZIP_v_undef_Mask(ShuffleMask, VT, WhichResult))
4609 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
4610 V1, V1).getValue(WhichResult);
4613 // If the shuffle is not directly supported and it has 4 elements, use
4614 // the PerfectShuffle-generated table to synthesize it from other shuffles.
4615 unsigned NumElts = VT.getVectorNumElements();
4617 unsigned PFIndexes[4];
4618 for (unsigned i = 0; i != 4; ++i) {
4619 if (ShuffleMask[i] < 0)
4622 PFIndexes[i] = ShuffleMask[i];
4625 // Compute the index in the perfect shuffle table.
4626 unsigned PFTableIndex =
4627 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
4628 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
4629 unsigned Cost = (PFEntry >> 30);
4632 return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl);
4635 // Implement shuffles with 32- or 64-bit elements as ARMISD::BUILD_VECTORs.
4636 if (EltSize >= 32) {
4637 // Do the expansion with floating-point types, since that is what the VFP
4638 // registers are defined to use, and since i64 is not legal.
4639 EVT EltVT = EVT::getFloatingPointVT(EltSize);
4640 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
4641 V1 = DAG.getNode(ISD::BITCAST, dl, VecVT, V1);
4642 V2 = DAG.getNode(ISD::BITCAST, dl, VecVT, V2);
4643 SmallVector<SDValue, 8> Ops;
4644 for (unsigned i = 0; i < NumElts; ++i) {
4645 if (ShuffleMask[i] < 0)
4646 Ops.push_back(DAG.getUNDEF(EltVT));
4648 Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT,
4649 ShuffleMask[i] < (int)NumElts ? V1 : V2,
4650 DAG.getConstant(ShuffleMask[i] & (NumElts-1),
4653 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, &Ops[0],NumElts);
4654 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
4657 if (VT == MVT::v8i8) {
4658 SDValue NewOp = LowerVECTOR_SHUFFLEv8i8(Op, ShuffleMask, DAG);
4659 if (NewOp.getNode())
4666 static SDValue LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
4667 // INSERT_VECTOR_ELT is legal only for immediate indexes.
4668 SDValue Lane = Op.getOperand(2);
4669 if (!isa<ConstantSDNode>(Lane))
4675 static SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
4676 // EXTRACT_VECTOR_ELT is legal only for immediate indexes.
4677 SDValue Lane = Op.getOperand(1);
4678 if (!isa<ConstantSDNode>(Lane))
4681 SDValue Vec = Op.getOperand(0);
4682 if (Op.getValueType() == MVT::i32 &&
4683 Vec.getValueType().getVectorElementType().getSizeInBits() < 32) {
4684 DebugLoc dl = Op.getDebugLoc();
4685 return DAG.getNode(ARMISD::VGETLANEu, dl, MVT::i32, Vec, Lane);
4691 static SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
4692 // The only time a CONCAT_VECTORS operation can have legal types is when
4693 // two 64-bit vectors are concatenated to a 128-bit vector.
4694 assert(Op.getValueType().is128BitVector() && Op.getNumOperands() == 2 &&
4695 "unexpected CONCAT_VECTORS");
4696 DebugLoc dl = Op.getDebugLoc();
4697 SDValue Val = DAG.getUNDEF(MVT::v2f64);
4698 SDValue Op0 = Op.getOperand(0);
4699 SDValue Op1 = Op.getOperand(1);
4700 if (Op0.getOpcode() != ISD::UNDEF)
4701 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
4702 DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op0),
4703 DAG.getIntPtrConstant(0));
4704 if (Op1.getOpcode() != ISD::UNDEF)
4705 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
4706 DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op1),
4707 DAG.getIntPtrConstant(1));
4708 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Val);
4711 /// isExtendedBUILD_VECTOR - Check if N is a constant BUILD_VECTOR where each
4712 /// element has been zero/sign-extended, depending on the isSigned parameter,
4713 /// from an integer type half its size.
4714 static bool isExtendedBUILD_VECTOR(SDNode *N, SelectionDAG &DAG,
4716 // A v2i64 BUILD_VECTOR will have been legalized to a BITCAST from v4i32.
4717 EVT VT = N->getValueType(0);
4718 if (VT == MVT::v2i64 && N->getOpcode() == ISD::BITCAST) {
4719 SDNode *BVN = N->getOperand(0).getNode();
4720 if (BVN->getValueType(0) != MVT::v4i32 ||
4721 BVN->getOpcode() != ISD::BUILD_VECTOR)
4723 unsigned LoElt = DAG.getTargetLoweringInfo().isBigEndian() ? 1 : 0;
4724 unsigned HiElt = 1 - LoElt;
4725 ConstantSDNode *Lo0 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt));
4726 ConstantSDNode *Hi0 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt));
4727 ConstantSDNode *Lo1 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt+2));
4728 ConstantSDNode *Hi1 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt+2));
4729 if (!Lo0 || !Hi0 || !Lo1 || !Hi1)
4732 if (Hi0->getSExtValue() == Lo0->getSExtValue() >> 32 &&
4733 Hi1->getSExtValue() == Lo1->getSExtValue() >> 32)
4736 if (Hi0->isNullValue() && Hi1->isNullValue())
4742 if (N->getOpcode() != ISD::BUILD_VECTOR)
4745 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
4746 SDNode *Elt = N->getOperand(i).getNode();
4747 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Elt)) {
4748 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4749 unsigned HalfSize = EltSize / 2;
4751 if (!isIntN(HalfSize, C->getSExtValue()))
4754 if (!isUIntN(HalfSize, C->getZExtValue()))
4765 /// isSignExtended - Check if a node is a vector value that is sign-extended
4766 /// or a constant BUILD_VECTOR with sign-extended elements.
4767 static bool isSignExtended(SDNode *N, SelectionDAG &DAG) {
4768 if (N->getOpcode() == ISD::SIGN_EXTEND || ISD::isSEXTLoad(N))
4770 if (isExtendedBUILD_VECTOR(N, DAG, true))
4775 /// isZeroExtended - Check if a node is a vector value that is zero-extended
4776 /// or a constant BUILD_VECTOR with zero-extended elements.
4777 static bool isZeroExtended(SDNode *N, SelectionDAG &DAG) {
4778 if (N->getOpcode() == ISD::ZERO_EXTEND || ISD::isZEXTLoad(N))
4780 if (isExtendedBUILD_VECTOR(N, DAG, false))
4785 /// SkipExtension - For a node that is a SIGN_EXTEND, ZERO_EXTEND, extending
4786 /// load, or BUILD_VECTOR with extended elements, return the unextended value.
4787 static SDValue SkipExtension(SDNode *N, SelectionDAG &DAG) {
4788 if (N->getOpcode() == ISD::SIGN_EXTEND || N->getOpcode() == ISD::ZERO_EXTEND)
4789 return N->getOperand(0);
4790 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N))
4791 return DAG.getLoad(LD->getMemoryVT(), N->getDebugLoc(), LD->getChain(),
4792 LD->getBasePtr(), LD->getPointerInfo(), LD->isVolatile(),
4793 LD->isNonTemporal(), LD->isInvariant(),
4794 LD->getAlignment());
4795 // Otherwise, the value must be a BUILD_VECTOR. For v2i64, it will
4796 // have been legalized as a BITCAST from v4i32.
4797 if (N->getOpcode() == ISD::BITCAST) {
4798 SDNode *BVN = N->getOperand(0).getNode();
4799 assert(BVN->getOpcode() == ISD::BUILD_VECTOR &&
4800 BVN->getValueType(0) == MVT::v4i32 && "expected v4i32 BUILD_VECTOR");
4801 unsigned LowElt = DAG.getTargetLoweringInfo().isBigEndian() ? 1 : 0;
4802 return DAG.getNode(ISD::BUILD_VECTOR, N->getDebugLoc(), MVT::v2i32,
4803 BVN->getOperand(LowElt), BVN->getOperand(LowElt+2));
4805 // Construct a new BUILD_VECTOR with elements truncated to half the size.
4806 assert(N->getOpcode() == ISD::BUILD_VECTOR && "expected BUILD_VECTOR");
4807 EVT VT = N->getValueType(0);
4808 unsigned EltSize = VT.getVectorElementType().getSizeInBits() / 2;
4809 unsigned NumElts = VT.getVectorNumElements();
4810 MVT TruncVT = MVT::getIntegerVT(EltSize);
4811 SmallVector<SDValue, 8> Ops;
4812 for (unsigned i = 0; i != NumElts; ++i) {
4813 ConstantSDNode *C = cast<ConstantSDNode>(N->getOperand(i));
4814 const APInt &CInt = C->getAPIntValue();
4815 // Element types smaller than 32 bits are not legal, so use i32 elements.
4816 // The values are implicitly truncated so sext vs. zext doesn't matter.
4817 Ops.push_back(DAG.getConstant(CInt.zextOrTrunc(32), MVT::i32));
4819 return DAG.getNode(ISD::BUILD_VECTOR, N->getDebugLoc(),
4820 MVT::getVectorVT(TruncVT, NumElts), Ops.data(), NumElts);
4823 static bool isAddSubSExt(SDNode *N, SelectionDAG &DAG) {
4824 unsigned Opcode = N->getOpcode();
4825 if (Opcode == ISD::ADD || Opcode == ISD::SUB) {
4826 SDNode *N0 = N->getOperand(0).getNode();
4827 SDNode *N1 = N->getOperand(1).getNode();
4828 return N0->hasOneUse() && N1->hasOneUse() &&
4829 isSignExtended(N0, DAG) && isSignExtended(N1, DAG);
4834 static bool isAddSubZExt(SDNode *N, SelectionDAG &DAG) {
4835 unsigned Opcode = N->getOpcode();
4836 if (Opcode == ISD::ADD || Opcode == ISD::SUB) {
4837 SDNode *N0 = N->getOperand(0).getNode();
4838 SDNode *N1 = N->getOperand(1).getNode();
4839 return N0->hasOneUse() && N1->hasOneUse() &&
4840 isZeroExtended(N0, DAG) && isZeroExtended(N1, DAG);
4845 static SDValue LowerMUL(SDValue Op, SelectionDAG &DAG) {
4846 // Multiplications are only custom-lowered for 128-bit vectors so that
4847 // VMULL can be detected. Otherwise v2i64 multiplications are not legal.
4848 EVT VT = Op.getValueType();
4849 assert(VT.is128BitVector() && "unexpected type for custom-lowering ISD::MUL");
4850 SDNode *N0 = Op.getOperand(0).getNode();
4851 SDNode *N1 = Op.getOperand(1).getNode();
4852 unsigned NewOpc = 0;
4854 bool isN0SExt = isSignExtended(N0, DAG);
4855 bool isN1SExt = isSignExtended(N1, DAG);
4856 if (isN0SExt && isN1SExt)
4857 NewOpc = ARMISD::VMULLs;
4859 bool isN0ZExt = isZeroExtended(N0, DAG);
4860 bool isN1ZExt = isZeroExtended(N1, DAG);
4861 if (isN0ZExt && isN1ZExt)
4862 NewOpc = ARMISD::VMULLu;
4863 else if (isN1SExt || isN1ZExt) {
4864 // Look for (s/zext A + s/zext B) * (s/zext C). We want to turn these
4865 // into (s/zext A * s/zext C) + (s/zext B * s/zext C)
4866 if (isN1SExt && isAddSubSExt(N0, DAG)) {
4867 NewOpc = ARMISD::VMULLs;
4869 } else if (isN1ZExt && isAddSubZExt(N0, DAG)) {
4870 NewOpc = ARMISD::VMULLu;
4872 } else if (isN0ZExt && isAddSubZExt(N1, DAG)) {
4874 NewOpc = ARMISD::VMULLu;
4880 if (VT == MVT::v2i64)
4881 // Fall through to expand this. It is not legal.
4884 // Other vector multiplications are legal.
4889 // Legalize to a VMULL instruction.
4890 DebugLoc DL = Op.getDebugLoc();
4892 SDValue Op1 = SkipExtension(N1, DAG);
4894 Op0 = SkipExtension(N0, DAG);
4895 assert(Op0.getValueType().is64BitVector() &&
4896 Op1.getValueType().is64BitVector() &&
4897 "unexpected types for extended operands to VMULL");
4898 return DAG.getNode(NewOpc, DL, VT, Op0, Op1);
4901 // Optimizing (zext A + zext B) * C, to (VMULL A, C) + (VMULL B, C) during
4902 // isel lowering to take advantage of no-stall back to back vmul + vmla.
4909 SDValue N00 = SkipExtension(N0->getOperand(0).getNode(), DAG);
4910 SDValue N01 = SkipExtension(N0->getOperand(1).getNode(), DAG);
4911 EVT Op1VT = Op1.getValueType();
4912 return DAG.getNode(N0->getOpcode(), DL, VT,
4913 DAG.getNode(NewOpc, DL, VT,
4914 DAG.getNode(ISD::BITCAST, DL, Op1VT, N00), Op1),
4915 DAG.getNode(NewOpc, DL, VT,
4916 DAG.getNode(ISD::BITCAST, DL, Op1VT, N01), Op1));
4920 LowerSDIV_v4i8(SDValue X, SDValue Y, DebugLoc dl, SelectionDAG &DAG) {
4922 // float4 xf = vcvt_f32_s32(vmovl_s16(a.lo));
4923 // float4 yf = vcvt_f32_s32(vmovl_s16(b.lo));
4924 X = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, X);
4925 Y = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, Y);
4926 X = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, X);
4927 Y = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, Y);
4928 // Get reciprocal estimate.
4929 // float4 recip = vrecpeq_f32(yf);
4930 Y = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4931 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), Y);
4932 // Because char has a smaller range than uchar, we can actually get away
4933 // without any newton steps. This requires that we use a weird bias
4934 // of 0xb000, however (again, this has been exhaustively tested).
4935 // float4 result = as_float4(as_int4(xf*recip) + 0xb000);
4936 X = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, X, Y);
4937 X = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, X);
4938 Y = DAG.getConstant(0xb000, MVT::i32);
4939 Y = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Y, Y, Y, Y);
4940 X = DAG.getNode(ISD::ADD, dl, MVT::v4i32, X, Y);
4941 X = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, X);
4942 // Convert back to short.
4943 X = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, X);
4944 X = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, X);
4949 LowerSDIV_v4i16(SDValue N0, SDValue N1, DebugLoc dl, SelectionDAG &DAG) {
4951 // Convert to float.
4952 // float4 yf = vcvt_f32_s32(vmovl_s16(y));
4953 // float4 xf = vcvt_f32_s32(vmovl_s16(x));
4954 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N0);
4955 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N1);
4956 N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0);
4957 N1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1);
4959 // Use reciprocal estimate and one refinement step.
4960 // float4 recip = vrecpeq_f32(yf);
4961 // recip *= vrecpsq_f32(yf, recip);
4962 N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4963 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), N1);
4964 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4965 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
4967 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
4968 // Because short has a smaller range than ushort, we can actually get away
4969 // with only a single newton step. This requires that we use a weird bias
4970 // of 89, however (again, this has been exhaustively tested).
4971 // float4 result = as_float4(as_int4(xf*recip) + 0x89);
4972 N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2);
4973 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0);
4974 N1 = DAG.getConstant(0x89, MVT::i32);
4975 N1 = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, N1, N1, N1, N1);
4976 N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1);
4977 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0);
4978 // Convert back to integer and return.
4979 // return vmovn_s32(vcvt_s32_f32(result));
4980 N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0);
4981 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0);
4985 static SDValue LowerSDIV(SDValue Op, SelectionDAG &DAG) {
4986 EVT VT = Op.getValueType();
4987 assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&
4988 "unexpected type for custom-lowering ISD::SDIV");
4990 DebugLoc dl = Op.getDebugLoc();
4991 SDValue N0 = Op.getOperand(0);
4992 SDValue N1 = Op.getOperand(1);
4995 if (VT == MVT::v8i8) {
4996 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N0);
4997 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N1);
4999 N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
5000 DAG.getIntPtrConstant(4));
5001 N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
5002 DAG.getIntPtrConstant(4));
5003 N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
5004 DAG.getIntPtrConstant(0));
5005 N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
5006 DAG.getIntPtrConstant(0));
5008 N0 = LowerSDIV_v4i8(N0, N1, dl, DAG); // v4i16
5009 N2 = LowerSDIV_v4i8(N2, N3, dl, DAG); // v4i16
5011 N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2);
5012 N0 = LowerCONCAT_VECTORS(N0, DAG);
5014 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v8i8, N0);
5017 return LowerSDIV_v4i16(N0, N1, dl, DAG);
5020 static SDValue LowerUDIV(SDValue Op, SelectionDAG &DAG) {
5021 EVT VT = Op.getValueType();
5022 assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&
5023 "unexpected type for custom-lowering ISD::UDIV");
5025 DebugLoc dl = Op.getDebugLoc();
5026 SDValue N0 = Op.getOperand(0);
5027 SDValue N1 = Op.getOperand(1);
5030 if (VT == MVT::v8i8) {
5031 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N0);
5032 N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N1);
5034 N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
5035 DAG.getIntPtrConstant(4));
5036 N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
5037 DAG.getIntPtrConstant(4));
5038 N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
5039 DAG.getIntPtrConstant(0));
5040 N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
5041 DAG.getIntPtrConstant(0));
5043 N0 = LowerSDIV_v4i16(N0, N1, dl, DAG); // v4i16
5044 N2 = LowerSDIV_v4i16(N2, N3, dl, DAG); // v4i16
5046 N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2);
5047 N0 = LowerCONCAT_VECTORS(N0, DAG);
5049 N0 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v8i8,
5050 DAG.getConstant(Intrinsic::arm_neon_vqmovnsu, MVT::i32),
5055 // v4i16 sdiv ... Convert to float.
5056 // float4 yf = vcvt_f32_s32(vmovl_u16(y));
5057 // float4 xf = vcvt_f32_s32(vmovl_u16(x));
5058 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N0);
5059 N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N1);
5060 N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0);
5061 SDValue BN1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1);
5063 // Use reciprocal estimate and two refinement steps.
5064 // float4 recip = vrecpeq_f32(yf);
5065 // recip *= vrecpsq_f32(yf, recip);
5066 // recip *= vrecpsq_f32(yf, recip);
5067 N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
5068 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), BN1);
5069 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
5070 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
5072 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
5073 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
5074 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
5076 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
5077 // Simply multiplying by the reciprocal estimate can leave us a few ulps
5078 // too low, so we add 2 ulps (exhaustive testing shows that this is enough,
5079 // and that it will never cause us to return an answer too large).
5080 // float4 result = as_float4(as_int4(xf*recip) + 2);
5081 N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2);
5082 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0);
5083 N1 = DAG.getConstant(2, MVT::i32);
5084 N1 = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, N1, N1, N1, N1);
5085 N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1);
5086 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0);
5087 // Convert back to integer and return.
5088 // return vmovn_u32(vcvt_s32_f32(result));
5089 N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0);
5090 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0);
5094 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
5095 EVT VT = Op.getNode()->getValueType(0);
5096 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
5099 bool ExtraOp = false;
5100 switch (Op.getOpcode()) {
5101 default: llvm_unreachable("Invalid code");
5102 case ISD::ADDC: Opc = ARMISD::ADDC; break;
5103 case ISD::ADDE: Opc = ARMISD::ADDE; ExtraOp = true; break;
5104 case ISD::SUBC: Opc = ARMISD::SUBC; break;
5105 case ISD::SUBE: Opc = ARMISD::SUBE; ExtraOp = true; break;
5109 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
5111 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
5112 Op.getOperand(1), Op.getOperand(2));
5115 static SDValue LowerAtomicLoadStore(SDValue Op, SelectionDAG &DAG) {
5116 // Monotonic load/store is legal for all targets
5117 if (cast<AtomicSDNode>(Op)->getOrdering() <= Monotonic)
5120 // Aquire/Release load/store is not legal for targets without a
5121 // dmb or equivalent available.
5127 ReplaceATOMIC_OP_64(SDNode *Node, SmallVectorImpl<SDValue>& Results,
5128 SelectionDAG &DAG, unsigned NewOp) {
5129 DebugLoc dl = Node->getDebugLoc();
5130 assert (Node->getValueType(0) == MVT::i64 &&
5131 "Only know how to expand i64 atomics");
5133 SmallVector<SDValue, 6> Ops;
5134 Ops.push_back(Node->getOperand(0)); // Chain
5135 Ops.push_back(Node->getOperand(1)); // Ptr
5137 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5138 Node->getOperand(2), DAG.getIntPtrConstant(0)));
5139 // High part of Val1
5140 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5141 Node->getOperand(2), DAG.getIntPtrConstant(1)));
5142 if (NewOp == ARMISD::ATOMCMPXCHG64_DAG) {
5143 // High part of Val1
5144 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5145 Node->getOperand(3), DAG.getIntPtrConstant(0)));
5146 // High part of Val2
5147 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5148 Node->getOperand(3), DAG.getIntPtrConstant(1)));
5150 SDVTList Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
5152 DAG.getMemIntrinsicNode(NewOp, dl, Tys, Ops.data(), Ops.size(), MVT::i64,
5153 cast<MemSDNode>(Node)->getMemOperand());
5154 SDValue OpsF[] = { Result.getValue(0), Result.getValue(1) };
5155 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
5156 Results.push_back(Result.getValue(2));
5159 SDValue ARMTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
5160 switch (Op.getOpcode()) {
5161 default: llvm_unreachable("Don't know how to custom lower this!");
5162 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
5163 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
5164 case ISD::GlobalAddress:
5165 return Subtarget->isTargetDarwin() ? LowerGlobalAddressDarwin(Op, DAG) :
5166 LowerGlobalAddressELF(Op, DAG);
5167 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
5168 case ISD::SELECT: return LowerSELECT(Op, DAG);
5169 case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
5170 case ISD::BR_CC: return LowerBR_CC(Op, DAG);
5171 case ISD::BR_JT: return LowerBR_JT(Op, DAG);
5172 case ISD::VASTART: return LowerVASTART(Op, DAG);
5173 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op, DAG, Subtarget);
5174 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG, Subtarget);
5175 case ISD::PREFETCH: return LowerPREFETCH(Op, DAG, Subtarget);
5176 case ISD::SINT_TO_FP:
5177 case ISD::UINT_TO_FP: return LowerINT_TO_FP(Op, DAG);
5178 case ISD::FP_TO_SINT:
5179 case ISD::FP_TO_UINT: return LowerFP_TO_INT(Op, DAG);
5180 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
5181 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
5182 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
5183 case ISD::GLOBAL_OFFSET_TABLE: return LowerGLOBAL_OFFSET_TABLE(Op, DAG);
5184 case ISD::EH_SJLJ_SETJMP: return LowerEH_SJLJ_SETJMP(Op, DAG);
5185 case ISD::EH_SJLJ_LONGJMP: return LowerEH_SJLJ_LONGJMP(Op, DAG);
5186 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG,
5188 case ISD::BITCAST: return ExpandBITCAST(Op.getNode(), DAG);
5191 case ISD::SRA: return LowerShift(Op.getNode(), DAG, Subtarget);
5192 case ISD::SHL_PARTS: return LowerShiftLeftParts(Op, DAG);
5193 case ISD::SRL_PARTS:
5194 case ISD::SRA_PARTS: return LowerShiftRightParts(Op, DAG);
5195 case ISD::CTTZ: return LowerCTTZ(Op.getNode(), DAG, Subtarget);
5196 case ISD::SETCC: return LowerVSETCC(Op, DAG);
5197 case ISD::ConstantFP: return LowerConstantFP(Op, DAG, Subtarget);
5198 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG, Subtarget);
5199 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
5200 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
5201 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
5202 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
5203 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
5204 case ISD::MUL: return LowerMUL(Op, DAG);
5205 case ISD::SDIV: return LowerSDIV(Op, DAG);
5206 case ISD::UDIV: return LowerUDIV(Op, DAG);
5210 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
5211 case ISD::ATOMIC_LOAD:
5212 case ISD::ATOMIC_STORE: return LowerAtomicLoadStore(Op, DAG);
5216 /// ReplaceNodeResults - Replace the results of node with an illegal result
5217 /// type with new values built out of custom code.
5218 void ARMTargetLowering::ReplaceNodeResults(SDNode *N,
5219 SmallVectorImpl<SDValue>&Results,
5220 SelectionDAG &DAG) const {
5222 switch (N->getOpcode()) {
5224 llvm_unreachable("Don't know how to custom expand this!");
5226 Res = ExpandBITCAST(N, DAG);
5230 Res = Expand64BitShift(N, DAG, Subtarget);
5232 case ISD::ATOMIC_LOAD_ADD:
5233 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMADD64_DAG);
5235 case ISD::ATOMIC_LOAD_AND:
5236 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMAND64_DAG);
5238 case ISD::ATOMIC_LOAD_NAND:
5239 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMNAND64_DAG);
5241 case ISD::ATOMIC_LOAD_OR:
5242 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMOR64_DAG);
5244 case ISD::ATOMIC_LOAD_SUB:
5245 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMSUB64_DAG);
5247 case ISD::ATOMIC_LOAD_XOR:
5248 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMXOR64_DAG);
5250 case ISD::ATOMIC_SWAP:
5251 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMSWAP64_DAG);
5253 case ISD::ATOMIC_CMP_SWAP:
5254 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMCMPXCHG64_DAG);
5258 Results.push_back(Res);
5261 //===----------------------------------------------------------------------===//
5262 // ARM Scheduler Hooks
5263 //===----------------------------------------------------------------------===//
5266 ARMTargetLowering::EmitAtomicCmpSwap(MachineInstr *MI,
5267 MachineBasicBlock *BB,
5268 unsigned Size) const {
5269 unsigned dest = MI->getOperand(0).getReg();
5270 unsigned ptr = MI->getOperand(1).getReg();
5271 unsigned oldval = MI->getOperand(2).getReg();
5272 unsigned newval = MI->getOperand(3).getReg();
5273 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5274 DebugLoc dl = MI->getDebugLoc();
5275 bool isThumb2 = Subtarget->isThumb2();
5277 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5278 unsigned scratch = MRI.createVirtualRegister(isThumb2 ?
5279 (const TargetRegisterClass*)&ARM::rGPRRegClass :
5280 (const TargetRegisterClass*)&ARM::GPRRegClass);
5283 MRI.constrainRegClass(dest, &ARM::rGPRRegClass);
5284 MRI.constrainRegClass(oldval, &ARM::rGPRRegClass);
5285 MRI.constrainRegClass(newval, &ARM::rGPRRegClass);
5288 unsigned ldrOpc, strOpc;
5290 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
5292 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
5293 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
5296 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
5297 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
5300 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
5301 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
5305 MachineFunction *MF = BB->getParent();
5306 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5307 MachineFunction::iterator It = BB;
5308 ++It; // insert the new blocks after the current block
5310 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
5311 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
5312 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5313 MF->insert(It, loop1MBB);
5314 MF->insert(It, loop2MBB);
5315 MF->insert(It, exitMBB);
5317 // Transfer the remainder of BB and its successor edges to exitMBB.
5318 exitMBB->splice(exitMBB->begin(), BB,
5319 llvm::next(MachineBasicBlock::iterator(MI)),
5321 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5325 // fallthrough --> loop1MBB
5326 BB->addSuccessor(loop1MBB);
5329 // ldrex dest, [ptr]
5333 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr);
5334 if (ldrOpc == ARM::t2LDREX)
5336 AddDefaultPred(MIB);
5337 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
5338 .addReg(dest).addReg(oldval));
5339 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5340 .addMBB(exitMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5341 BB->addSuccessor(loop2MBB);
5342 BB->addSuccessor(exitMBB);
5345 // strex scratch, newval, [ptr]
5349 MIB = BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(newval).addReg(ptr);
5350 if (strOpc == ARM::t2STREX)
5352 AddDefaultPred(MIB);
5353 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5354 .addReg(scratch).addImm(0));
5355 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5356 .addMBB(loop1MBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5357 BB->addSuccessor(loop1MBB);
5358 BB->addSuccessor(exitMBB);
5364 MI->eraseFromParent(); // The instruction is gone now.
5370 ARMTargetLowering::EmitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
5371 unsigned Size, unsigned BinOpcode) const {
5372 // This also handles ATOMIC_SWAP, indicated by BinOpcode==0.
5373 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5375 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5376 MachineFunction *MF = BB->getParent();
5377 MachineFunction::iterator It = BB;
5380 unsigned dest = MI->getOperand(0).getReg();
5381 unsigned ptr = MI->getOperand(1).getReg();
5382 unsigned incr = MI->getOperand(2).getReg();
5383 DebugLoc dl = MI->getDebugLoc();
5384 bool isThumb2 = Subtarget->isThumb2();
5386 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5388 MRI.constrainRegClass(dest, &ARM::rGPRRegClass);
5389 MRI.constrainRegClass(ptr, &ARM::rGPRRegClass);
5392 unsigned ldrOpc, strOpc;
5394 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
5396 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
5397 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
5400 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
5401 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
5404 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
5405 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
5409 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5410 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5411 MF->insert(It, loopMBB);
5412 MF->insert(It, exitMBB);
5414 // Transfer the remainder of BB and its successor edges to exitMBB.
5415 exitMBB->splice(exitMBB->begin(), BB,
5416 llvm::next(MachineBasicBlock::iterator(MI)),
5418 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5420 const TargetRegisterClass *TRC = isThumb2 ?
5421 (const TargetRegisterClass*)&ARM::tGPRRegClass :
5422 (const TargetRegisterClass*)&ARM::GPRRegClass;
5423 unsigned scratch = MRI.createVirtualRegister(TRC);
5424 unsigned scratch2 = (!BinOpcode) ? incr : MRI.createVirtualRegister(TRC);
5428 // fallthrough --> loopMBB
5429 BB->addSuccessor(loopMBB);
5433 // <binop> scratch2, dest, incr
5434 // strex scratch, scratch2, ptr
5437 // fallthrough --> exitMBB
5439 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr);
5440 if (ldrOpc == ARM::t2LDREX)
5442 AddDefaultPred(MIB);
5444 // operand order needs to go the other way for NAND
5445 if (BinOpcode == ARM::BICrr || BinOpcode == ARM::t2BICrr)
5446 AddDefaultPred(BuildMI(BB, dl, TII->get(BinOpcode), scratch2).
5447 addReg(incr).addReg(dest)).addReg(0);
5449 AddDefaultPred(BuildMI(BB, dl, TII->get(BinOpcode), scratch2).
5450 addReg(dest).addReg(incr)).addReg(0);
5453 MIB = BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(scratch2).addReg(ptr);
5454 if (strOpc == ARM::t2STREX)
5456 AddDefaultPred(MIB);
5457 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5458 .addReg(scratch).addImm(0));
5459 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5460 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5462 BB->addSuccessor(loopMBB);
5463 BB->addSuccessor(exitMBB);
5469 MI->eraseFromParent(); // The instruction is gone now.
5475 ARMTargetLowering::EmitAtomicBinaryMinMax(MachineInstr *MI,
5476 MachineBasicBlock *BB,
5479 ARMCC::CondCodes Cond) const {
5480 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5482 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5483 MachineFunction *MF = BB->getParent();
5484 MachineFunction::iterator It = BB;
5487 unsigned dest = MI->getOperand(0).getReg();
5488 unsigned ptr = MI->getOperand(1).getReg();
5489 unsigned incr = MI->getOperand(2).getReg();
5490 unsigned oldval = dest;
5491 DebugLoc dl = MI->getDebugLoc();
5492 bool isThumb2 = Subtarget->isThumb2();
5494 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5496 MRI.constrainRegClass(dest, &ARM::rGPRRegClass);
5497 MRI.constrainRegClass(ptr, &ARM::rGPRRegClass);
5500 unsigned ldrOpc, strOpc, extendOpc;
5502 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
5504 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
5505 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
5506 extendOpc = isThumb2 ? ARM::t2SXTB : ARM::SXTB;
5509 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
5510 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
5511 extendOpc = isThumb2 ? ARM::t2SXTH : ARM::SXTH;
5514 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
5515 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
5520 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5521 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5522 MF->insert(It, loopMBB);
5523 MF->insert(It, exitMBB);
5525 // Transfer the remainder of BB and its successor edges to exitMBB.
5526 exitMBB->splice(exitMBB->begin(), BB,
5527 llvm::next(MachineBasicBlock::iterator(MI)),
5529 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5531 const TargetRegisterClass *TRC = isThumb2 ?
5532 (const TargetRegisterClass*)&ARM::tGPRRegClass :
5533 (const TargetRegisterClass*)&ARM::GPRRegClass;
5534 unsigned scratch = MRI.createVirtualRegister(TRC);
5535 unsigned scratch2 = MRI.createVirtualRegister(TRC);
5539 // fallthrough --> loopMBB
5540 BB->addSuccessor(loopMBB);
5544 // (sign extend dest, if required)
5546 // cmov.cond scratch2, dest, incr
5547 // strex scratch, scratch2, ptr
5550 // fallthrough --> exitMBB
5552 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr);
5553 if (ldrOpc == ARM::t2LDREX)
5555 AddDefaultPred(MIB);
5557 // Sign extend the value, if necessary.
5558 if (signExtend && extendOpc) {
5559 oldval = MRI.createVirtualRegister(&ARM::GPRRegClass);
5560 AddDefaultPred(BuildMI(BB, dl, TII->get(extendOpc), oldval)
5565 // Build compare and cmov instructions.
5566 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
5567 .addReg(oldval).addReg(incr));
5568 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2MOVCCr : ARM::MOVCCr), scratch2)
5569 .addReg(oldval).addReg(incr).addImm(Cond).addReg(ARM::CPSR);
5571 MIB = BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(scratch2).addReg(ptr);
5572 if (strOpc == ARM::t2STREX)
5574 AddDefaultPred(MIB);
5575 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5576 .addReg(scratch).addImm(0));
5577 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5578 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5580 BB->addSuccessor(loopMBB);
5581 BB->addSuccessor(exitMBB);
5587 MI->eraseFromParent(); // The instruction is gone now.
5593 ARMTargetLowering::EmitAtomicBinary64(MachineInstr *MI, MachineBasicBlock *BB,
5594 unsigned Op1, unsigned Op2,
5595 bool NeedsCarry, bool IsCmpxchg) const {
5596 // This also handles ATOMIC_SWAP, indicated by Op1==0.
5597 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5599 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5600 MachineFunction *MF = BB->getParent();
5601 MachineFunction::iterator It = BB;
5604 unsigned destlo = MI->getOperand(0).getReg();
5605 unsigned desthi = MI->getOperand(1).getReg();
5606 unsigned ptr = MI->getOperand(2).getReg();
5607 unsigned vallo = MI->getOperand(3).getReg();
5608 unsigned valhi = MI->getOperand(4).getReg();
5609 DebugLoc dl = MI->getDebugLoc();
5610 bool isThumb2 = Subtarget->isThumb2();
5612 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5614 MRI.constrainRegClass(destlo, &ARM::rGPRRegClass);
5615 MRI.constrainRegClass(desthi, &ARM::rGPRRegClass);
5616 MRI.constrainRegClass(ptr, &ARM::rGPRRegClass);
5619 unsigned ldrOpc = isThumb2 ? ARM::t2LDREXD : ARM::LDREXD;
5620 unsigned strOpc = isThumb2 ? ARM::t2STREXD : ARM::STREXD;
5622 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5623 MachineBasicBlock *contBB = 0, *cont2BB = 0;
5625 contBB = MF->CreateMachineBasicBlock(LLVM_BB);
5626 cont2BB = MF->CreateMachineBasicBlock(LLVM_BB);
5628 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5629 MF->insert(It, loopMBB);
5631 MF->insert(It, contBB);
5632 MF->insert(It, cont2BB);
5634 MF->insert(It, exitMBB);
5636 // Transfer the remainder of BB and its successor edges to exitMBB.
5637 exitMBB->splice(exitMBB->begin(), BB,
5638 llvm::next(MachineBasicBlock::iterator(MI)),
5640 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5642 const TargetRegisterClass *TRC = isThumb2 ?
5643 (const TargetRegisterClass*)&ARM::tGPRRegClass :
5644 (const TargetRegisterClass*)&ARM::GPRRegClass;
5645 unsigned storesuccess = MRI.createVirtualRegister(TRC);
5649 // fallthrough --> loopMBB
5650 BB->addSuccessor(loopMBB);
5653 // ldrexd r2, r3, ptr
5654 // <binopa> r0, r2, incr
5655 // <binopb> r1, r3, incr
5656 // strexd storesuccess, r0, r1, ptr
5657 // cmp storesuccess, #0
5659 // fallthrough --> exitMBB
5661 // Note that the registers are explicitly specified because there is not any
5662 // way to force the register allocator to allocate a register pair.
5664 // FIXME: The hardcoded registers are not necessary for Thumb2, but we
5665 // need to properly enforce the restriction that the two output registers
5666 // for ldrexd must be different.
5669 AddDefaultPred(BuildMI(BB, dl, TII->get(ldrOpc))
5670 .addReg(ARM::R2, RegState::Define)
5671 .addReg(ARM::R3, RegState::Define).addReg(ptr));
5672 // Copy r2/r3 into dest. (This copy will normally be coalesced.)
5673 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), destlo).addReg(ARM::R2);
5674 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), desthi).addReg(ARM::R3);
5678 for (unsigned i = 0; i < 2; i++) {
5679 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr :
5681 .addReg(i == 0 ? destlo : desthi)
5682 .addReg(i == 0 ? vallo : valhi));
5683 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5684 .addMBB(exitMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5685 BB->addSuccessor(exitMBB);
5686 BB->addSuccessor(i == 0 ? contBB : cont2BB);
5687 BB = (i == 0 ? contBB : cont2BB);
5690 // Copy to physregs for strexd
5691 unsigned setlo = MI->getOperand(5).getReg();
5692 unsigned sethi = MI->getOperand(6).getReg();
5693 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R0).addReg(setlo);
5694 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R1).addReg(sethi);
5696 // Perform binary operation
5697 AddDefaultPred(BuildMI(BB, dl, TII->get(Op1), ARM::R0)
5698 .addReg(destlo).addReg(vallo))
5699 .addReg(NeedsCarry ? ARM::CPSR : 0, getDefRegState(NeedsCarry));
5700 AddDefaultPred(BuildMI(BB, dl, TII->get(Op2), ARM::R1)
5701 .addReg(desthi).addReg(valhi)).addReg(0);
5703 // Copy to physregs for strexd
5704 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R0).addReg(vallo);
5705 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R1).addReg(valhi);
5709 AddDefaultPred(BuildMI(BB, dl, TII->get(strOpc), storesuccess)
5710 .addReg(ARM::R0).addReg(ARM::R1).addReg(ptr));
5712 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5713 .addReg(storesuccess).addImm(0));
5714 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5715 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5717 BB->addSuccessor(loopMBB);
5718 BB->addSuccessor(exitMBB);
5724 MI->eraseFromParent(); // The instruction is gone now.
5729 /// SetupEntryBlockForSjLj - Insert code into the entry block that creates and
5730 /// registers the function context.
5731 void ARMTargetLowering::
5732 SetupEntryBlockForSjLj(MachineInstr *MI, MachineBasicBlock *MBB,
5733 MachineBasicBlock *DispatchBB, int FI) const {
5734 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5735 DebugLoc dl = MI->getDebugLoc();
5736 MachineFunction *MF = MBB->getParent();
5737 MachineRegisterInfo *MRI = &MF->getRegInfo();
5738 MachineConstantPool *MCP = MF->getConstantPool();
5739 ARMFunctionInfo *AFI = MF->getInfo<ARMFunctionInfo>();
5740 const Function *F = MF->getFunction();
5742 bool isThumb = Subtarget->isThumb();
5743 bool isThumb2 = Subtarget->isThumb2();
5745 unsigned PCLabelId = AFI->createPICLabelUId();
5746 unsigned PCAdj = (isThumb || isThumb2) ? 4 : 8;
5747 ARMConstantPoolValue *CPV =
5748 ARMConstantPoolMBB::Create(F->getContext(), DispatchBB, PCLabelId, PCAdj);
5749 unsigned CPI = MCP->getConstantPoolIndex(CPV, 4);
5751 const TargetRegisterClass *TRC = isThumb ?
5752 (const TargetRegisterClass*)&ARM::tGPRRegClass :
5753 (const TargetRegisterClass*)&ARM::GPRRegClass;
5755 // Grab constant pool and fixed stack memory operands.
5756 MachineMemOperand *CPMMO =
5757 MF->getMachineMemOperand(MachinePointerInfo::getConstantPool(),
5758 MachineMemOperand::MOLoad, 4, 4);
5760 MachineMemOperand *FIMMOSt =
5761 MF->getMachineMemOperand(MachinePointerInfo::getFixedStack(FI),
5762 MachineMemOperand::MOStore, 4, 4);
5764 // Load the address of the dispatch MBB into the jump buffer.
5766 // Incoming value: jbuf
5767 // ldr.n r5, LCPI1_1
5770 // str r5, [$jbuf, #+4] ; &jbuf[1]
5771 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5772 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2LDRpci), NewVReg1)
5773 .addConstantPoolIndex(CPI)
5774 .addMemOperand(CPMMO));
5775 // Set the low bit because of thumb mode.
5776 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
5778 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2ORRri), NewVReg2)
5779 .addReg(NewVReg1, RegState::Kill)
5781 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
5782 BuildMI(*MBB, MI, dl, TII->get(ARM::tPICADD), NewVReg3)
5783 .addReg(NewVReg2, RegState::Kill)
5785 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2STRi12))
5786 .addReg(NewVReg3, RegState::Kill)
5788 .addImm(36) // &jbuf[1] :: pc
5789 .addMemOperand(FIMMOSt));
5790 } else if (isThumb) {
5791 // Incoming value: jbuf
5792 // ldr.n r1, LCPI1_4
5796 // add r2, $jbuf, #+4 ; &jbuf[1]
5798 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5799 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tLDRpci), NewVReg1)
5800 .addConstantPoolIndex(CPI)
5801 .addMemOperand(CPMMO));
5802 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
5803 BuildMI(*MBB, MI, dl, TII->get(ARM::tPICADD), NewVReg2)
5804 .addReg(NewVReg1, RegState::Kill)
5806 // Set the low bit because of thumb mode.
5807 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
5808 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tMOVi8), NewVReg3)
5809 .addReg(ARM::CPSR, RegState::Define)
5811 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
5812 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tORR), NewVReg4)
5813 .addReg(ARM::CPSR, RegState::Define)
5814 .addReg(NewVReg2, RegState::Kill)
5815 .addReg(NewVReg3, RegState::Kill));
5816 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
5817 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tADDrSPi), NewVReg5)
5819 .addImm(36)); // &jbuf[1] :: pc
5820 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tSTRi))
5821 .addReg(NewVReg4, RegState::Kill)
5822 .addReg(NewVReg5, RegState::Kill)
5824 .addMemOperand(FIMMOSt));
5826 // Incoming value: jbuf
5829 // str r1, [$jbuf, #+4] ; &jbuf[1]
5830 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5831 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::LDRi12), NewVReg1)
5832 .addConstantPoolIndex(CPI)
5834 .addMemOperand(CPMMO));
5835 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
5836 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::PICADD), NewVReg2)
5837 .addReg(NewVReg1, RegState::Kill)
5838 .addImm(PCLabelId));
5839 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::STRi12))
5840 .addReg(NewVReg2, RegState::Kill)
5842 .addImm(36) // &jbuf[1] :: pc
5843 .addMemOperand(FIMMOSt));
5847 MachineBasicBlock *ARMTargetLowering::
5848 EmitSjLjDispatchBlock(MachineInstr *MI, MachineBasicBlock *MBB) const {
5849 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5850 DebugLoc dl = MI->getDebugLoc();
5851 MachineFunction *MF = MBB->getParent();
5852 MachineRegisterInfo *MRI = &MF->getRegInfo();
5853 ARMFunctionInfo *AFI = MF->getInfo<ARMFunctionInfo>();
5854 MachineFrameInfo *MFI = MF->getFrameInfo();
5855 int FI = MFI->getFunctionContextIndex();
5857 const TargetRegisterClass *TRC = Subtarget->isThumb() ?
5858 (const TargetRegisterClass*)&ARM::tGPRRegClass :
5859 (const TargetRegisterClass*)&ARM::GPRnopcRegClass;
5861 // Get a mapping of the call site numbers to all of the landing pads they're
5863 DenseMap<unsigned, SmallVector<MachineBasicBlock*, 2> > CallSiteNumToLPad;
5864 unsigned MaxCSNum = 0;
5865 MachineModuleInfo &MMI = MF->getMMI();
5866 for (MachineFunction::iterator BB = MF->begin(), E = MF->end(); BB != E;
5868 if (!BB->isLandingPad()) continue;
5870 // FIXME: We should assert that the EH_LABEL is the first MI in the landing
5872 for (MachineBasicBlock::iterator
5873 II = BB->begin(), IE = BB->end(); II != IE; ++II) {
5874 if (!II->isEHLabel()) continue;
5876 MCSymbol *Sym = II->getOperand(0).getMCSymbol();
5877 if (!MMI.hasCallSiteLandingPad(Sym)) continue;
5879 SmallVectorImpl<unsigned> &CallSiteIdxs = MMI.getCallSiteLandingPad(Sym);
5880 for (SmallVectorImpl<unsigned>::iterator
5881 CSI = CallSiteIdxs.begin(), CSE = CallSiteIdxs.end();
5882 CSI != CSE; ++CSI) {
5883 CallSiteNumToLPad[*CSI].push_back(BB);
5884 MaxCSNum = std::max(MaxCSNum, *CSI);
5890 // Get an ordered list of the machine basic blocks for the jump table.
5891 std::vector<MachineBasicBlock*> LPadList;
5892 SmallPtrSet<MachineBasicBlock*, 64> InvokeBBs;
5893 LPadList.reserve(CallSiteNumToLPad.size());
5894 for (unsigned I = 1; I <= MaxCSNum; ++I) {
5895 SmallVectorImpl<MachineBasicBlock*> &MBBList = CallSiteNumToLPad[I];
5896 for (SmallVectorImpl<MachineBasicBlock*>::iterator
5897 II = MBBList.begin(), IE = MBBList.end(); II != IE; ++II) {
5898 LPadList.push_back(*II);
5899 InvokeBBs.insert((*II)->pred_begin(), (*II)->pred_end());
5903 assert(!LPadList.empty() &&
5904 "No landing pad destinations for the dispatch jump table!");
5906 // Create the jump table and associated information.
5907 MachineJumpTableInfo *JTI =
5908 MF->getOrCreateJumpTableInfo(MachineJumpTableInfo::EK_Inline);
5909 unsigned MJTI = JTI->createJumpTableIndex(LPadList);
5910 unsigned UId = AFI->createJumpTableUId();
5912 // Create the MBBs for the dispatch code.
5914 // Shove the dispatch's address into the return slot in the function context.
5915 MachineBasicBlock *DispatchBB = MF->CreateMachineBasicBlock();
5916 DispatchBB->setIsLandingPad();
5918 MachineBasicBlock *TrapBB = MF->CreateMachineBasicBlock();
5919 BuildMI(TrapBB, dl, TII->get(Subtarget->isThumb() ? ARM::tTRAP : ARM::TRAP));
5920 DispatchBB->addSuccessor(TrapBB);
5922 MachineBasicBlock *DispContBB = MF->CreateMachineBasicBlock();
5923 DispatchBB->addSuccessor(DispContBB);
5926 MF->insert(MF->end(), DispatchBB);
5927 MF->insert(MF->end(), DispContBB);
5928 MF->insert(MF->end(), TrapBB);
5930 // Insert code into the entry block that creates and registers the function
5932 SetupEntryBlockForSjLj(MI, MBB, DispatchBB, FI);
5934 MachineMemOperand *FIMMOLd =
5935 MF->getMachineMemOperand(MachinePointerInfo::getFixedStack(FI),
5936 MachineMemOperand::MOLoad |
5937 MachineMemOperand::MOVolatile, 4, 4);
5939 if (AFI->isThumb1OnlyFunction())
5940 BuildMI(DispatchBB, dl, TII->get(ARM::tInt_eh_sjlj_dispatchsetup));
5941 else if (!Subtarget->hasVFP2())
5942 BuildMI(DispatchBB, dl, TII->get(ARM::Int_eh_sjlj_dispatchsetup_nofp));
5944 BuildMI(DispatchBB, dl, TII->get(ARM::Int_eh_sjlj_dispatchsetup));
5946 unsigned NumLPads = LPadList.size();
5947 if (Subtarget->isThumb2()) {
5948 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5949 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2LDRi12), NewVReg1)
5952 .addMemOperand(FIMMOLd));
5954 if (NumLPads < 256) {
5955 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPri))
5957 .addImm(LPadList.size()));
5959 unsigned VReg1 = MRI->createVirtualRegister(TRC);
5960 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2MOVi16), VReg1)
5961 .addImm(NumLPads & 0xFFFF));
5963 unsigned VReg2 = VReg1;
5964 if ((NumLPads & 0xFFFF0000) != 0) {
5965 VReg2 = MRI->createVirtualRegister(TRC);
5966 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2MOVTi16), VReg2)
5968 .addImm(NumLPads >> 16));
5971 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPrr))
5976 BuildMI(DispatchBB, dl, TII->get(ARM::t2Bcc))
5981 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
5982 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::t2LEApcrelJT),NewVReg3)
5983 .addJumpTableIndex(MJTI)
5986 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
5989 BuildMI(DispContBB, dl, TII->get(ARM::t2ADDrs), NewVReg4)
5990 .addReg(NewVReg3, RegState::Kill)
5992 .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, 2))));
5994 BuildMI(DispContBB, dl, TII->get(ARM::t2BR_JT))
5995 .addReg(NewVReg4, RegState::Kill)
5997 .addJumpTableIndex(MJTI)
5999 } else if (Subtarget->isThumb()) {
6000 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
6001 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tLDRspi), NewVReg1)
6004 .addMemOperand(FIMMOLd));
6006 if (NumLPads < 256) {
6007 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tCMPi8))
6011 MachineConstantPool *ConstantPool = MF->getConstantPool();
6012 Type *Int32Ty = Type::getInt32Ty(MF->getFunction()->getContext());
6013 const Constant *C = ConstantInt::get(Int32Ty, NumLPads);
6015 // MachineConstantPool wants an explicit alignment.
6016 unsigned Align = getTargetData()->getPrefTypeAlignment(Int32Ty);
6018 Align = getTargetData()->getTypeAllocSize(C->getType());
6019 unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align);
6021 unsigned VReg1 = MRI->createVirtualRegister(TRC);
6022 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tLDRpci))
6023 .addReg(VReg1, RegState::Define)
6024 .addConstantPoolIndex(Idx));
6025 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tCMPr))
6030 BuildMI(DispatchBB, dl, TII->get(ARM::tBcc))
6035 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
6036 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLSLri), NewVReg2)
6037 .addReg(ARM::CPSR, RegState::Define)
6041 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
6042 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLEApcrelJT), NewVReg3)
6043 .addJumpTableIndex(MJTI)
6046 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
6047 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tADDrr), NewVReg4)
6048 .addReg(ARM::CPSR, RegState::Define)
6049 .addReg(NewVReg2, RegState::Kill)
6052 MachineMemOperand *JTMMOLd =
6053 MF->getMachineMemOperand(MachinePointerInfo::getJumpTable(),
6054 MachineMemOperand::MOLoad, 4, 4);
6056 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
6057 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLDRi), NewVReg5)
6058 .addReg(NewVReg4, RegState::Kill)
6060 .addMemOperand(JTMMOLd));
6062 unsigned NewVReg6 = MRI->createVirtualRegister(TRC);
6063 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tADDrr), NewVReg6)
6064 .addReg(ARM::CPSR, RegState::Define)
6065 .addReg(NewVReg5, RegState::Kill)
6068 BuildMI(DispContBB, dl, TII->get(ARM::tBR_JTr))
6069 .addReg(NewVReg6, RegState::Kill)
6070 .addJumpTableIndex(MJTI)
6073 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
6074 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::LDRi12), NewVReg1)
6077 .addMemOperand(FIMMOLd));
6079 if (NumLPads < 256) {
6080 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPri))
6083 } else if (Subtarget->hasV6T2Ops() && isUInt<16>(NumLPads)) {
6084 unsigned VReg1 = MRI->createVirtualRegister(TRC);
6085 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::MOVi16), VReg1)
6086 .addImm(NumLPads & 0xFFFF));
6088 unsigned VReg2 = VReg1;
6089 if ((NumLPads & 0xFFFF0000) != 0) {
6090 VReg2 = MRI->createVirtualRegister(TRC);
6091 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::MOVTi16), VReg2)
6093 .addImm(NumLPads >> 16));
6096 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPrr))
6100 MachineConstantPool *ConstantPool = MF->getConstantPool();
6101 Type *Int32Ty = Type::getInt32Ty(MF->getFunction()->getContext());
6102 const Constant *C = ConstantInt::get(Int32Ty, NumLPads);
6104 // MachineConstantPool wants an explicit alignment.
6105 unsigned Align = getTargetData()->getPrefTypeAlignment(Int32Ty);
6107 Align = getTargetData()->getTypeAllocSize(C->getType());
6108 unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align);
6110 unsigned VReg1 = MRI->createVirtualRegister(TRC);
6111 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::LDRcp))
6112 .addReg(VReg1, RegState::Define)
6113 .addConstantPoolIndex(Idx)
6115 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPrr))
6117 .addReg(VReg1, RegState::Kill));
6120 BuildMI(DispatchBB, dl, TII->get(ARM::Bcc))
6125 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
6127 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::MOVsi), NewVReg3)
6129 .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, 2))));
6130 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
6131 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::LEApcrelJT), NewVReg4)
6132 .addJumpTableIndex(MJTI)
6135 MachineMemOperand *JTMMOLd =
6136 MF->getMachineMemOperand(MachinePointerInfo::getJumpTable(),
6137 MachineMemOperand::MOLoad, 4, 4);
6138 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
6140 BuildMI(DispContBB, dl, TII->get(ARM::LDRrs), NewVReg5)
6141 .addReg(NewVReg3, RegState::Kill)
6144 .addMemOperand(JTMMOLd));
6146 BuildMI(DispContBB, dl, TII->get(ARM::BR_JTadd))
6147 .addReg(NewVReg5, RegState::Kill)
6149 .addJumpTableIndex(MJTI)
6153 // Add the jump table entries as successors to the MBB.
6154 SmallPtrSet<MachineBasicBlock*, 8> SeenMBBs;
6155 for (std::vector<MachineBasicBlock*>::iterator
6156 I = LPadList.begin(), E = LPadList.end(); I != E; ++I) {
6157 MachineBasicBlock *CurMBB = *I;
6158 if (SeenMBBs.insert(CurMBB))
6159 DispContBB->addSuccessor(CurMBB);
6162 // N.B. the order the invoke BBs are processed in doesn't matter here.
6163 const ARMBaseInstrInfo *AII = static_cast<const ARMBaseInstrInfo*>(TII);
6164 const ARMBaseRegisterInfo &RI = AII->getRegisterInfo();
6165 const uint16_t *SavedRegs = RI.getCalleeSavedRegs(MF);
6166 SmallVector<MachineBasicBlock*, 64> MBBLPads;
6167 for (SmallPtrSet<MachineBasicBlock*, 64>::iterator
6168 I = InvokeBBs.begin(), E = InvokeBBs.end(); I != E; ++I) {
6169 MachineBasicBlock *BB = *I;
6171 // Remove the landing pad successor from the invoke block and replace it
6172 // with the new dispatch block.
6173 SmallVector<MachineBasicBlock*, 4> Successors(BB->succ_begin(),
6175 while (!Successors.empty()) {
6176 MachineBasicBlock *SMBB = Successors.pop_back_val();
6177 if (SMBB->isLandingPad()) {
6178 BB->removeSuccessor(SMBB);
6179 MBBLPads.push_back(SMBB);
6183 BB->addSuccessor(DispatchBB);
6185 // Find the invoke call and mark all of the callee-saved registers as
6186 // 'implicit defined' so that they're spilled. This prevents code from
6187 // moving instructions to before the EH block, where they will never be
6189 for (MachineBasicBlock::reverse_iterator
6190 II = BB->rbegin(), IE = BB->rend(); II != IE; ++II) {
6191 if (!II->isCall()) continue;
6193 DenseMap<unsigned, bool> DefRegs;
6194 for (MachineInstr::mop_iterator
6195 OI = II->operands_begin(), OE = II->operands_end();
6197 if (!OI->isReg()) continue;
6198 DefRegs[OI->getReg()] = true;
6201 MachineInstrBuilder MIB(&*II);
6203 for (unsigned i = 0; SavedRegs[i] != 0; ++i) {
6204 unsigned Reg = SavedRegs[i];
6205 if (Subtarget->isThumb2() &&
6206 !ARM::tGPRRegClass.contains(Reg) &&
6207 !ARM::hGPRRegClass.contains(Reg))
6209 if (Subtarget->isThumb1Only() && !ARM::tGPRRegClass.contains(Reg))
6211 if (!Subtarget->isThumb() && !ARM::GPRRegClass.contains(Reg))
6214 MIB.addReg(Reg, RegState::ImplicitDefine | RegState::Dead);
6221 // Mark all former landing pads as non-landing pads. The dispatch is the only
6223 for (SmallVectorImpl<MachineBasicBlock*>::iterator
6224 I = MBBLPads.begin(), E = MBBLPads.end(); I != E; ++I)
6225 (*I)->setIsLandingPad(false);
6227 // The instruction is gone now.
6228 MI->eraseFromParent();
6234 MachineBasicBlock *OtherSucc(MachineBasicBlock *MBB, MachineBasicBlock *Succ) {
6235 for (MachineBasicBlock::succ_iterator I = MBB->succ_begin(),
6236 E = MBB->succ_end(); I != E; ++I)
6239 llvm_unreachable("Expecting a BB with two successors!");
6242 MachineBasicBlock *ARMTargetLowering::
6243 EmitStructByval(MachineInstr *MI, MachineBasicBlock *BB) const {
6244 // This pseudo instruction has 3 operands: dst, src, size
6245 // We expand it to a loop if size > Subtarget->getMaxInlineSizeThreshold().
6246 // Otherwise, we will generate unrolled scalar copies.
6247 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
6248 const BasicBlock *LLVM_BB = BB->getBasicBlock();
6249 MachineFunction::iterator It = BB;
6252 unsigned dest = MI->getOperand(0).getReg();
6253 unsigned src = MI->getOperand(1).getReg();
6254 unsigned SizeVal = MI->getOperand(2).getImm();
6255 unsigned Align = MI->getOperand(3).getImm();
6256 DebugLoc dl = MI->getDebugLoc();
6258 bool isThumb2 = Subtarget->isThumb2();
6259 MachineFunction *MF = BB->getParent();
6260 MachineRegisterInfo &MRI = MF->getRegInfo();
6261 unsigned ldrOpc, strOpc, UnitSize = 0;
6263 const TargetRegisterClass *TRC = isThumb2 ?
6264 (const TargetRegisterClass*)&ARM::tGPRRegClass :
6265 (const TargetRegisterClass*)&ARM::GPRRegClass;
6266 const TargetRegisterClass *TRC_Vec = 0;
6269 ldrOpc = isThumb2 ? ARM::t2LDRB_POST : ARM::LDRB_POST_IMM;
6270 strOpc = isThumb2 ? ARM::t2STRB_POST : ARM::STRB_POST_IMM;
6272 } else if (Align & 2) {
6273 ldrOpc = isThumb2 ? ARM::t2LDRH_POST : ARM::LDRH_POST;
6274 strOpc = isThumb2 ? ARM::t2STRH_POST : ARM::STRH_POST;
6277 // Check whether we can use NEON instructions.
6278 if (!MF->getFunction()->hasFnAttr(Attribute::NoImplicitFloat) &&
6279 Subtarget->hasNEON()) {
6280 if ((Align % 16 == 0) && SizeVal >= 16) {
6281 ldrOpc = ARM::VLD1q32wb_fixed;
6282 strOpc = ARM::VST1q32wb_fixed;
6284 TRC_Vec = (const TargetRegisterClass*)&ARM::DPairRegClass;
6286 else if ((Align % 8 == 0) && SizeVal >= 8) {
6287 ldrOpc = ARM::VLD1d32wb_fixed;
6288 strOpc = ARM::VST1d32wb_fixed;
6290 TRC_Vec = (const TargetRegisterClass*)&ARM::DPRRegClass;
6293 // Can't use NEON instructions.
6294 if (UnitSize == 0) {
6295 ldrOpc = isThumb2 ? ARM::t2LDR_POST : ARM::LDR_POST_IMM;
6296 strOpc = isThumb2 ? ARM::t2STR_POST : ARM::STR_POST_IMM;
6301 unsigned BytesLeft = SizeVal % UnitSize;
6302 unsigned LoopSize = SizeVal - BytesLeft;
6304 if (SizeVal <= Subtarget->getMaxInlineSizeThreshold()) {
6305 // Use LDR and STR to copy.
6306 // [scratch, srcOut] = LDR_POST(srcIn, UnitSize)
6307 // [destOut] = STR_POST(scratch, destIn, UnitSize)
6308 unsigned srcIn = src;
6309 unsigned destIn = dest;
6310 for (unsigned i = 0; i < LoopSize; i+=UnitSize) {
6311 unsigned scratch = MRI.createVirtualRegister(UnitSize >= 8 ? TRC_Vec:TRC);
6312 unsigned srcOut = MRI.createVirtualRegister(TRC);
6313 unsigned destOut = MRI.createVirtualRegister(TRC);
6314 if (UnitSize >= 8) {
6315 AddDefaultPred(BuildMI(*BB, MI, dl,
6316 TII->get(ldrOpc), scratch)
6317 .addReg(srcOut, RegState::Define).addReg(srcIn).addImm(0));
6319 AddDefaultPred(BuildMI(*BB, MI, dl, TII->get(strOpc), destOut)
6320 .addReg(destIn).addImm(0).addReg(scratch));
6321 } else if (isThumb2) {
6322 AddDefaultPred(BuildMI(*BB, MI, dl,
6323 TII->get(ldrOpc), scratch)
6324 .addReg(srcOut, RegState::Define).addReg(srcIn).addImm(UnitSize));
6326 AddDefaultPred(BuildMI(*BB, MI, dl, TII->get(strOpc), destOut)
6327 .addReg(scratch).addReg(destIn)
6330 AddDefaultPred(BuildMI(*BB, MI, dl,
6331 TII->get(ldrOpc), scratch)
6332 .addReg(srcOut, RegState::Define).addReg(srcIn).addReg(0)
6335 AddDefaultPred(BuildMI(*BB, MI, dl, TII->get(strOpc), destOut)
6336 .addReg(scratch).addReg(destIn)
6337 .addReg(0).addImm(UnitSize));
6343 // Handle the leftover bytes with LDRB and STRB.
6344 // [scratch, srcOut] = LDRB_POST(srcIn, 1)
6345 // [destOut] = STRB_POST(scratch, destIn, 1)
6346 ldrOpc = isThumb2 ? ARM::t2LDRB_POST : ARM::LDRB_POST_IMM;
6347 strOpc = isThumb2 ? ARM::t2STRB_POST : ARM::STRB_POST_IMM;
6348 for (unsigned i = 0; i < BytesLeft; i++) {
6349 unsigned scratch = MRI.createVirtualRegister(TRC);
6350 unsigned srcOut = MRI.createVirtualRegister(TRC);
6351 unsigned destOut = MRI.createVirtualRegister(TRC);
6353 AddDefaultPred(BuildMI(*BB, MI, dl,
6354 TII->get(ldrOpc),scratch)
6355 .addReg(srcOut, RegState::Define).addReg(srcIn).addImm(1));
6357 AddDefaultPred(BuildMI(*BB, MI, dl, TII->get(strOpc), destOut)
6358 .addReg(scratch).addReg(destIn)
6359 .addReg(0).addImm(1));
6361 AddDefaultPred(BuildMI(*BB, MI, dl,
6362 TII->get(ldrOpc),scratch)
6363 .addReg(srcOut, RegState::Define).addReg(srcIn).addImm(1));
6365 AddDefaultPred(BuildMI(*BB, MI, dl, TII->get(strOpc), destOut)
6366 .addReg(scratch).addReg(destIn)
6367 .addReg(0).addImm(1));
6372 MI->eraseFromParent(); // The instruction is gone now.
6376 // Expand the pseudo op to a loop.
6379 // movw varEnd, # --> with thumb2
6381 // ldrcp varEnd, idx --> without thumb2
6382 // fallthrough --> loopMBB
6384 // PHI varPhi, varEnd, varLoop
6385 // PHI srcPhi, src, srcLoop
6386 // PHI destPhi, dst, destLoop
6387 // [scratch, srcLoop] = LDR_POST(srcPhi, UnitSize)
6388 // [destLoop] = STR_POST(scratch, destPhi, UnitSize)
6389 // subs varLoop, varPhi, #UnitSize
6391 // fallthrough --> exitMBB
6393 // epilogue to handle left-over bytes
6394 // [scratch, srcOut] = LDRB_POST(srcLoop, 1)
6395 // [destOut] = STRB_POST(scratch, destLoop, 1)
6396 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
6397 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
6398 MF->insert(It, loopMBB);
6399 MF->insert(It, exitMBB);
6401 // Transfer the remainder of BB and its successor edges to exitMBB.
6402 exitMBB->splice(exitMBB->begin(), BB,
6403 llvm::next(MachineBasicBlock::iterator(MI)),
6405 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
6407 // Load an immediate to varEnd.
6408 unsigned varEnd = MRI.createVirtualRegister(TRC);
6410 unsigned VReg1 = varEnd;
6411 if ((LoopSize & 0xFFFF0000) != 0)
6412 VReg1 = MRI.createVirtualRegister(TRC);
6413 AddDefaultPred(BuildMI(BB, dl, TII->get(ARM::t2MOVi16), VReg1)
6414 .addImm(LoopSize & 0xFFFF));
6416 if ((LoopSize & 0xFFFF0000) != 0)
6417 AddDefaultPred(BuildMI(BB, dl, TII->get(ARM::t2MOVTi16), varEnd)
6419 .addImm(LoopSize >> 16));
6421 MachineConstantPool *ConstantPool = MF->getConstantPool();
6422 Type *Int32Ty = Type::getInt32Ty(MF->getFunction()->getContext());
6423 const Constant *C = ConstantInt::get(Int32Ty, LoopSize);
6425 // MachineConstantPool wants an explicit alignment.
6426 unsigned Align = getTargetData()->getPrefTypeAlignment(Int32Ty);
6428 Align = getTargetData()->getTypeAllocSize(C->getType());
6429 unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align);
6431 AddDefaultPred(BuildMI(BB, dl, TII->get(ARM::LDRcp))
6432 .addReg(varEnd, RegState::Define)
6433 .addConstantPoolIndex(Idx)
6436 BB->addSuccessor(loopMBB);
6438 // Generate the loop body:
6439 // varPhi = PHI(varLoop, varEnd)
6440 // srcPhi = PHI(srcLoop, src)
6441 // destPhi = PHI(destLoop, dst)
6442 MachineBasicBlock *entryBB = BB;
6444 unsigned varLoop = MRI.createVirtualRegister(TRC);
6445 unsigned varPhi = MRI.createVirtualRegister(TRC);
6446 unsigned srcLoop = MRI.createVirtualRegister(TRC);
6447 unsigned srcPhi = MRI.createVirtualRegister(TRC);
6448 unsigned destLoop = MRI.createVirtualRegister(TRC);
6449 unsigned destPhi = MRI.createVirtualRegister(TRC);
6451 BuildMI(*BB, BB->begin(), dl, TII->get(ARM::PHI), varPhi)
6452 .addReg(varLoop).addMBB(loopMBB)
6453 .addReg(varEnd).addMBB(entryBB);
6454 BuildMI(BB, dl, TII->get(ARM::PHI), srcPhi)
6455 .addReg(srcLoop).addMBB(loopMBB)
6456 .addReg(src).addMBB(entryBB);
6457 BuildMI(BB, dl, TII->get(ARM::PHI), destPhi)
6458 .addReg(destLoop).addMBB(loopMBB)
6459 .addReg(dest).addMBB(entryBB);
6461 // [scratch, srcLoop] = LDR_POST(srcPhi, UnitSize)
6462 // [destLoop] = STR_POST(scratch, destPhi, UnitSiz)
6463 unsigned scratch = MRI.createVirtualRegister(UnitSize >= 8 ? TRC_Vec:TRC);
6464 if (UnitSize >= 8) {
6465 AddDefaultPred(BuildMI(BB, dl, TII->get(ldrOpc), scratch)
6466 .addReg(srcLoop, RegState::Define).addReg(srcPhi).addImm(0));
6468 AddDefaultPred(BuildMI(BB, dl, TII->get(strOpc), destLoop)
6469 .addReg(destPhi).addImm(0).addReg(scratch));
6470 } else if (isThumb2) {
6471 AddDefaultPred(BuildMI(BB, dl, TII->get(ldrOpc), scratch)
6472 .addReg(srcLoop, RegState::Define).addReg(srcPhi).addImm(UnitSize));
6474 AddDefaultPred(BuildMI(BB, dl, TII->get(strOpc), destLoop)
6475 .addReg(scratch).addReg(destPhi)
6478 AddDefaultPred(BuildMI(BB, dl, TII->get(ldrOpc), scratch)
6479 .addReg(srcLoop, RegState::Define).addReg(srcPhi).addReg(0)
6482 AddDefaultPred(BuildMI(BB, dl, TII->get(strOpc), destLoop)
6483 .addReg(scratch).addReg(destPhi)
6484 .addReg(0).addImm(UnitSize));
6487 // Decrement loop variable by UnitSize.
6488 MachineInstrBuilder MIB = BuildMI(BB, dl,
6489 TII->get(isThumb2 ? ARM::t2SUBri : ARM::SUBri), varLoop);
6490 AddDefaultCC(AddDefaultPred(MIB.addReg(varPhi).addImm(UnitSize)));
6491 MIB->getOperand(5).setReg(ARM::CPSR);
6492 MIB->getOperand(5).setIsDef(true);
6494 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
6495 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
6497 // loopMBB can loop back to loopMBB or fall through to exitMBB.
6498 BB->addSuccessor(loopMBB);
6499 BB->addSuccessor(exitMBB);
6501 // Add epilogue to handle BytesLeft.
6503 MachineInstr *StartOfExit = exitMBB->begin();
6504 ldrOpc = isThumb2 ? ARM::t2LDRB_POST : ARM::LDRB_POST_IMM;
6505 strOpc = isThumb2 ? ARM::t2STRB_POST : ARM::STRB_POST_IMM;
6507 // [scratch, srcOut] = LDRB_POST(srcLoop, 1)
6508 // [destOut] = STRB_POST(scratch, destLoop, 1)
6509 unsigned srcIn = srcLoop;
6510 unsigned destIn = destLoop;
6511 for (unsigned i = 0; i < BytesLeft; i++) {
6512 unsigned scratch = MRI.createVirtualRegister(TRC);
6513 unsigned srcOut = MRI.createVirtualRegister(TRC);
6514 unsigned destOut = MRI.createVirtualRegister(TRC);
6516 AddDefaultPred(BuildMI(*BB, StartOfExit, dl,
6517 TII->get(ldrOpc),scratch)
6518 .addReg(srcOut, RegState::Define).addReg(srcIn).addImm(1));
6520 AddDefaultPred(BuildMI(*BB, StartOfExit, dl, TII->get(strOpc), destOut)
6521 .addReg(scratch).addReg(destIn)
6524 AddDefaultPred(BuildMI(*BB, StartOfExit, dl,
6525 TII->get(ldrOpc),scratch)
6526 .addReg(srcOut, RegState::Define).addReg(srcIn).addReg(0).addImm(1));
6528 AddDefaultPred(BuildMI(*BB, StartOfExit, dl, TII->get(strOpc), destOut)
6529 .addReg(scratch).addReg(destIn)
6530 .addReg(0).addImm(1));
6536 MI->eraseFromParent(); // The instruction is gone now.
6541 ARMTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
6542 MachineBasicBlock *BB) const {
6543 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
6544 DebugLoc dl = MI->getDebugLoc();
6545 bool isThumb2 = Subtarget->isThumb2();
6546 switch (MI->getOpcode()) {
6549 llvm_unreachable("Unexpected instr type to insert");
6551 // The Thumb2 pre-indexed stores have the same MI operands, they just
6552 // define them differently in the .td files from the isel patterns, so
6553 // they need pseudos.
6554 case ARM::t2STR_preidx:
6555 MI->setDesc(TII->get(ARM::t2STR_PRE));
6557 case ARM::t2STRB_preidx:
6558 MI->setDesc(TII->get(ARM::t2STRB_PRE));
6560 case ARM::t2STRH_preidx:
6561 MI->setDesc(TII->get(ARM::t2STRH_PRE));
6564 case ARM::STRi_preidx:
6565 case ARM::STRBi_preidx: {
6566 unsigned NewOpc = MI->getOpcode() == ARM::STRi_preidx ?
6567 ARM::STR_PRE_IMM : ARM::STRB_PRE_IMM;
6568 // Decode the offset.
6569 unsigned Offset = MI->getOperand(4).getImm();
6570 bool isSub = ARM_AM::getAM2Op(Offset) == ARM_AM::sub;
6571 Offset = ARM_AM::getAM2Offset(Offset);
6575 MachineMemOperand *MMO = *MI->memoperands_begin();
6576 BuildMI(*BB, MI, dl, TII->get(NewOpc))
6577 .addOperand(MI->getOperand(0)) // Rn_wb
6578 .addOperand(MI->getOperand(1)) // Rt
6579 .addOperand(MI->getOperand(2)) // Rn
6580 .addImm(Offset) // offset (skip GPR==zero_reg)
6581 .addOperand(MI->getOperand(5)) // pred
6582 .addOperand(MI->getOperand(6))
6583 .addMemOperand(MMO);
6584 MI->eraseFromParent();
6587 case ARM::STRr_preidx:
6588 case ARM::STRBr_preidx:
6589 case ARM::STRH_preidx: {
6591 switch (MI->getOpcode()) {
6592 default: llvm_unreachable("unexpected opcode!");
6593 case ARM::STRr_preidx: NewOpc = ARM::STR_PRE_REG; break;
6594 case ARM::STRBr_preidx: NewOpc = ARM::STRB_PRE_REG; break;
6595 case ARM::STRH_preidx: NewOpc = ARM::STRH_PRE; break;
6597 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(NewOpc));
6598 for (unsigned i = 0; i < MI->getNumOperands(); ++i)
6599 MIB.addOperand(MI->getOperand(i));
6600 MI->eraseFromParent();
6603 case ARM::ATOMIC_LOAD_ADD_I8:
6604 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
6605 case ARM::ATOMIC_LOAD_ADD_I16:
6606 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
6607 case ARM::ATOMIC_LOAD_ADD_I32:
6608 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
6610 case ARM::ATOMIC_LOAD_AND_I8:
6611 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
6612 case ARM::ATOMIC_LOAD_AND_I16:
6613 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
6614 case ARM::ATOMIC_LOAD_AND_I32:
6615 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
6617 case ARM::ATOMIC_LOAD_OR_I8:
6618 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
6619 case ARM::ATOMIC_LOAD_OR_I16:
6620 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
6621 case ARM::ATOMIC_LOAD_OR_I32:
6622 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
6624 case ARM::ATOMIC_LOAD_XOR_I8:
6625 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
6626 case ARM::ATOMIC_LOAD_XOR_I16:
6627 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
6628 case ARM::ATOMIC_LOAD_XOR_I32:
6629 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
6631 case ARM::ATOMIC_LOAD_NAND_I8:
6632 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
6633 case ARM::ATOMIC_LOAD_NAND_I16:
6634 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
6635 case ARM::ATOMIC_LOAD_NAND_I32:
6636 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
6638 case ARM::ATOMIC_LOAD_SUB_I8:
6639 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
6640 case ARM::ATOMIC_LOAD_SUB_I16:
6641 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
6642 case ARM::ATOMIC_LOAD_SUB_I32:
6643 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
6645 case ARM::ATOMIC_LOAD_MIN_I8:
6646 return EmitAtomicBinaryMinMax(MI, BB, 1, true, ARMCC::LT);
6647 case ARM::ATOMIC_LOAD_MIN_I16:
6648 return EmitAtomicBinaryMinMax(MI, BB, 2, true, ARMCC::LT);
6649 case ARM::ATOMIC_LOAD_MIN_I32:
6650 return EmitAtomicBinaryMinMax(MI, BB, 4, true, ARMCC::LT);
6652 case ARM::ATOMIC_LOAD_MAX_I8:
6653 return EmitAtomicBinaryMinMax(MI, BB, 1, true, ARMCC::GT);
6654 case ARM::ATOMIC_LOAD_MAX_I16:
6655 return EmitAtomicBinaryMinMax(MI, BB, 2, true, ARMCC::GT);
6656 case ARM::ATOMIC_LOAD_MAX_I32:
6657 return EmitAtomicBinaryMinMax(MI, BB, 4, true, ARMCC::GT);
6659 case ARM::ATOMIC_LOAD_UMIN_I8:
6660 return EmitAtomicBinaryMinMax(MI, BB, 1, false, ARMCC::LO);
6661 case ARM::ATOMIC_LOAD_UMIN_I16:
6662 return EmitAtomicBinaryMinMax(MI, BB, 2, false, ARMCC::LO);
6663 case ARM::ATOMIC_LOAD_UMIN_I32:
6664 return EmitAtomicBinaryMinMax(MI, BB, 4, false, ARMCC::LO);
6666 case ARM::ATOMIC_LOAD_UMAX_I8:
6667 return EmitAtomicBinaryMinMax(MI, BB, 1, false, ARMCC::HI);
6668 case ARM::ATOMIC_LOAD_UMAX_I16:
6669 return EmitAtomicBinaryMinMax(MI, BB, 2, false, ARMCC::HI);
6670 case ARM::ATOMIC_LOAD_UMAX_I32:
6671 return EmitAtomicBinaryMinMax(MI, BB, 4, false, ARMCC::HI);
6673 case ARM::ATOMIC_SWAP_I8: return EmitAtomicBinary(MI, BB, 1, 0);
6674 case ARM::ATOMIC_SWAP_I16: return EmitAtomicBinary(MI, BB, 2, 0);
6675 case ARM::ATOMIC_SWAP_I32: return EmitAtomicBinary(MI, BB, 4, 0);
6677 case ARM::ATOMIC_CMP_SWAP_I8: return EmitAtomicCmpSwap(MI, BB, 1);
6678 case ARM::ATOMIC_CMP_SWAP_I16: return EmitAtomicCmpSwap(MI, BB, 2);
6679 case ARM::ATOMIC_CMP_SWAP_I32: return EmitAtomicCmpSwap(MI, BB, 4);
6682 case ARM::ATOMADD6432:
6683 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr,
6684 isThumb2 ? ARM::t2ADCrr : ARM::ADCrr,
6685 /*NeedsCarry*/ true);
6686 case ARM::ATOMSUB6432:
6687 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr,
6688 isThumb2 ? ARM::t2SBCrr : ARM::SBCrr,
6689 /*NeedsCarry*/ true);
6690 case ARM::ATOMOR6432:
6691 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr,
6692 isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
6693 case ARM::ATOMXOR6432:
6694 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2EORrr : ARM::EORrr,
6695 isThumb2 ? ARM::t2EORrr : ARM::EORrr);
6696 case ARM::ATOMAND6432:
6697 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr,
6698 isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
6699 case ARM::ATOMSWAP6432:
6700 return EmitAtomicBinary64(MI, BB, 0, 0, false);
6701 case ARM::ATOMCMPXCHG6432:
6702 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr,
6703 isThumb2 ? ARM::t2SBCrr : ARM::SBCrr,
6704 /*NeedsCarry*/ false, /*IsCmpxchg*/true);
6706 case ARM::tMOVCCr_pseudo: {
6707 // To "insert" a SELECT_CC instruction, we actually have to insert the
6708 // diamond control-flow pattern. The incoming instruction knows the
6709 // destination vreg to set, the condition code register to branch on, the
6710 // true/false values to select between, and a branch opcode to use.
6711 const BasicBlock *LLVM_BB = BB->getBasicBlock();
6712 MachineFunction::iterator It = BB;
6718 // cmpTY ccX, r1, r2
6720 // fallthrough --> copy0MBB
6721 MachineBasicBlock *thisMBB = BB;
6722 MachineFunction *F = BB->getParent();
6723 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
6724 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
6725 F->insert(It, copy0MBB);
6726 F->insert(It, sinkMBB);
6728 // Transfer the remainder of BB and its successor edges to sinkMBB.
6729 sinkMBB->splice(sinkMBB->begin(), BB,
6730 llvm::next(MachineBasicBlock::iterator(MI)),
6732 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
6734 BB->addSuccessor(copy0MBB);
6735 BB->addSuccessor(sinkMBB);
6737 BuildMI(BB, dl, TII->get(ARM::tBcc)).addMBB(sinkMBB)
6738 .addImm(MI->getOperand(3).getImm()).addReg(MI->getOperand(4).getReg());
6741 // %FalseValue = ...
6742 // # fallthrough to sinkMBB
6745 // Update machine-CFG edges
6746 BB->addSuccessor(sinkMBB);
6749 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
6752 BuildMI(*BB, BB->begin(), dl,
6753 TII->get(ARM::PHI), MI->getOperand(0).getReg())
6754 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
6755 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
6757 MI->eraseFromParent(); // The pseudo instruction is gone now.
6762 case ARM::BCCZi64: {
6763 // If there is an unconditional branch to the other successor, remove it.
6764 BB->erase(llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
6766 // Compare both parts that make up the double comparison separately for
6768 bool RHSisZero = MI->getOpcode() == ARM::BCCZi64;
6770 unsigned LHS1 = MI->getOperand(1).getReg();
6771 unsigned LHS2 = MI->getOperand(2).getReg();
6773 AddDefaultPred(BuildMI(BB, dl,
6774 TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
6775 .addReg(LHS1).addImm(0));
6776 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
6777 .addReg(LHS2).addImm(0)
6778 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
6780 unsigned RHS1 = MI->getOperand(3).getReg();
6781 unsigned RHS2 = MI->getOperand(4).getReg();
6782 AddDefaultPred(BuildMI(BB, dl,
6783 TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
6784 .addReg(LHS1).addReg(RHS1));
6785 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
6786 .addReg(LHS2).addReg(RHS2)
6787 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
6790 MachineBasicBlock *destMBB = MI->getOperand(RHSisZero ? 3 : 5).getMBB();
6791 MachineBasicBlock *exitMBB = OtherSucc(BB, destMBB);
6792 if (MI->getOperand(0).getImm() == ARMCC::NE)
6793 std::swap(destMBB, exitMBB);
6795 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
6796 .addMBB(destMBB).addImm(ARMCC::EQ).addReg(ARM::CPSR);
6798 AddDefaultPred(BuildMI(BB, dl, TII->get(ARM::t2B)).addMBB(exitMBB));
6800 BuildMI(BB, dl, TII->get(ARM::B)) .addMBB(exitMBB);
6802 MI->eraseFromParent(); // The pseudo instruction is gone now.
6806 case ARM::Int_eh_sjlj_setjmp:
6807 case ARM::Int_eh_sjlj_setjmp_nofp:
6808 case ARM::tInt_eh_sjlj_setjmp:
6809 case ARM::t2Int_eh_sjlj_setjmp:
6810 case ARM::t2Int_eh_sjlj_setjmp_nofp:
6811 EmitSjLjDispatchBlock(MI, BB);
6816 // To insert an ABS instruction, we have to insert the
6817 // diamond control-flow pattern. The incoming instruction knows the
6818 // source vreg to test against 0, the destination vreg to set,
6819 // the condition code register to branch on, the
6820 // true/false values to select between, and a branch opcode to use.
6825 // BCC (branch to SinkBB if V0 >= 0)
6826 // RSBBB: V3 = RSBri V2, 0 (compute ABS if V2 < 0)
6827 // SinkBB: V1 = PHI(V2, V3)
6828 const BasicBlock *LLVM_BB = BB->getBasicBlock();
6829 MachineFunction::iterator BBI = BB;
6831 MachineFunction *Fn = BB->getParent();
6832 MachineBasicBlock *RSBBB = Fn->CreateMachineBasicBlock(LLVM_BB);
6833 MachineBasicBlock *SinkBB = Fn->CreateMachineBasicBlock(LLVM_BB);
6834 Fn->insert(BBI, RSBBB);
6835 Fn->insert(BBI, SinkBB);
6837 unsigned int ABSSrcReg = MI->getOperand(1).getReg();
6838 unsigned int ABSDstReg = MI->getOperand(0).getReg();
6839 bool isThumb2 = Subtarget->isThumb2();
6840 MachineRegisterInfo &MRI = Fn->getRegInfo();
6841 // In Thumb mode S must not be specified if source register is the SP or
6842 // PC and if destination register is the SP, so restrict register class
6843 unsigned NewRsbDstReg = MRI.createVirtualRegister(isThumb2 ?
6844 (const TargetRegisterClass*)&ARM::rGPRRegClass :
6845 (const TargetRegisterClass*)&ARM::GPRRegClass);
6847 // Transfer the remainder of BB and its successor edges to sinkMBB.
6848 SinkBB->splice(SinkBB->begin(), BB,
6849 llvm::next(MachineBasicBlock::iterator(MI)),
6851 SinkBB->transferSuccessorsAndUpdatePHIs(BB);
6853 BB->addSuccessor(RSBBB);
6854 BB->addSuccessor(SinkBB);
6856 // fall through to SinkMBB
6857 RSBBB->addSuccessor(SinkBB);
6859 // insert a cmp at the end of BB
6860 AddDefaultPred(BuildMI(BB, dl,
6861 TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
6862 .addReg(ABSSrcReg).addImm(0));
6864 // insert a bcc with opposite CC to ARMCC::MI at the end of BB
6866 TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc)).addMBB(SinkBB)
6867 .addImm(ARMCC::getOppositeCondition(ARMCC::MI)).addReg(ARM::CPSR);
6869 // insert rsbri in RSBBB
6870 // Note: BCC and rsbri will be converted into predicated rsbmi
6871 // by if-conversion pass
6872 BuildMI(*RSBBB, RSBBB->begin(), dl,
6873 TII->get(isThumb2 ? ARM::t2RSBri : ARM::RSBri), NewRsbDstReg)
6874 .addReg(ABSSrcReg, RegState::Kill)
6875 .addImm(0).addImm((unsigned)ARMCC::AL).addReg(0).addReg(0);
6877 // insert PHI in SinkBB,
6878 // reuse ABSDstReg to not change uses of ABS instruction
6879 BuildMI(*SinkBB, SinkBB->begin(), dl,
6880 TII->get(ARM::PHI), ABSDstReg)
6881 .addReg(NewRsbDstReg).addMBB(RSBBB)
6882 .addReg(ABSSrcReg).addMBB(BB);
6884 // remove ABS instruction
6885 MI->eraseFromParent();
6887 // return last added BB
6890 case ARM::COPY_STRUCT_BYVAL_I32:
6892 return EmitStructByval(MI, BB);
6896 void ARMTargetLowering::AdjustInstrPostInstrSelection(MachineInstr *MI,
6897 SDNode *Node) const {
6898 if (!MI->hasPostISelHook()) {
6899 assert(!convertAddSubFlagsOpcode(MI->getOpcode()) &&
6900 "Pseudo flag-setting opcodes must be marked with 'hasPostISelHook'");
6904 const MCInstrDesc *MCID = &MI->getDesc();
6905 // Adjust potentially 's' setting instructions after isel, i.e. ADC, SBC, RSB,
6906 // RSC. Coming out of isel, they have an implicit CPSR def, but the optional
6907 // operand is still set to noreg. If needed, set the optional operand's
6908 // register to CPSR, and remove the redundant implicit def.
6910 // e.g. ADCS (..., CPSR<imp-def>) -> ADC (... opt:CPSR<def>).
6912 // Rename pseudo opcodes.
6913 unsigned NewOpc = convertAddSubFlagsOpcode(MI->getOpcode());
6915 const ARMBaseInstrInfo *TII =
6916 static_cast<const ARMBaseInstrInfo*>(getTargetMachine().getInstrInfo());
6917 MCID = &TII->get(NewOpc);
6919 assert(MCID->getNumOperands() == MI->getDesc().getNumOperands() + 1 &&
6920 "converted opcode should be the same except for cc_out");
6924 // Add the optional cc_out operand
6925 MI->addOperand(MachineOperand::CreateReg(0, /*isDef=*/true));
6927 unsigned ccOutIdx = MCID->getNumOperands() - 1;
6929 // Any ARM instruction that sets the 's' bit should specify an optional
6930 // "cc_out" operand in the last operand position.
6931 if (!MI->hasOptionalDef() || !MCID->OpInfo[ccOutIdx].isOptionalDef()) {
6932 assert(!NewOpc && "Optional cc_out operand required");
6935 // Look for an implicit def of CPSR added by MachineInstr ctor. Remove it
6936 // since we already have an optional CPSR def.
6937 bool definesCPSR = false;
6938 bool deadCPSR = false;
6939 for (unsigned i = MCID->getNumOperands(), e = MI->getNumOperands();
6941 const MachineOperand &MO = MI->getOperand(i);
6942 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR) {
6946 MI->RemoveOperand(i);
6951 assert(!NewOpc && "Optional cc_out operand required");
6954 assert(deadCPSR == !Node->hasAnyUseOfValue(1) && "inconsistent dead flag");
6956 assert(!MI->getOperand(ccOutIdx).getReg() &&
6957 "expect uninitialized optional cc_out operand");
6961 // If this instruction was defined with an optional CPSR def and its dag node
6962 // had a live implicit CPSR def, then activate the optional CPSR def.
6963 MachineOperand &MO = MI->getOperand(ccOutIdx);
6964 MO.setReg(ARM::CPSR);
6968 //===----------------------------------------------------------------------===//
6969 // ARM Optimization Hooks
6970 //===----------------------------------------------------------------------===//
6972 // Helper function that checks if N is a null or all ones constant.
6973 static inline bool isZeroOrAllOnes(SDValue N, bool AllOnes) {
6974 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N);
6977 return AllOnes ? C->isAllOnesValue() : C->isNullValue();
6980 // Return true if N is conditionally 0 or all ones.
6981 // Detects these expressions where cc is an i1 value:
6983 // (select cc 0, y) [AllOnes=0]
6984 // (select cc y, 0) [AllOnes=0]
6985 // (zext cc) [AllOnes=0]
6986 // (sext cc) [AllOnes=0/1]
6987 // (select cc -1, y) [AllOnes=1]
6988 // (select cc y, -1) [AllOnes=1]
6990 // Invert is set when N is the null/all ones constant when CC is false.
6991 // OtherOp is set to the alternative value of N.
6992 static bool isConditionalZeroOrAllOnes(SDNode *N, bool AllOnes,
6993 SDValue &CC, bool &Invert,
6995 SelectionDAG &DAG) {
6996 switch (N->getOpcode()) {
6997 default: return false;
6999 CC = N->getOperand(0);
7000 SDValue N1 = N->getOperand(1);
7001 SDValue N2 = N->getOperand(2);
7002 if (isZeroOrAllOnes(N1, AllOnes)) {
7007 if (isZeroOrAllOnes(N2, AllOnes)) {
7014 case ISD::ZERO_EXTEND:
7015 // (zext cc) can never be the all ones value.
7019 case ISD::SIGN_EXTEND: {
7020 EVT VT = N->getValueType(0);
7021 CC = N->getOperand(0);
7022 if (CC.getValueType() != MVT::i1)
7026 // When looking for an AllOnes constant, N is an sext, and the 'other'
7028 OtherOp = DAG.getConstant(0, VT);
7029 else if (N->getOpcode() == ISD::ZERO_EXTEND)
7030 // When looking for a 0 constant, N can be zext or sext.
7031 OtherOp = DAG.getConstant(1, VT);
7033 OtherOp = DAG.getConstant(APInt::getAllOnesValue(VT.getSizeInBits()), VT);
7039 // Combine a constant select operand into its use:
7041 // (add (select cc, 0, c), x) -> (select cc, x, (add, x, c))
7042 // (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c))
7043 // (and (select cc, -1, c), x) -> (select cc, x, (and, x, c)) [AllOnes=1]
7044 // (or (select cc, 0, c), x) -> (select cc, x, (or, x, c))
7045 // (xor (select cc, 0, c), x) -> (select cc, x, (xor, x, c))
7047 // The transform is rejected if the select doesn't have a constant operand that
7048 // is null, or all ones when AllOnes is set.
7050 // Also recognize sext/zext from i1:
7052 // (add (zext cc), x) -> (select cc (add x, 1), x)
7053 // (add (sext cc), x) -> (select cc (add x, -1), x)
7055 // These transformations eventually create predicated instructions.
7057 // @param N The node to transform.
7058 // @param Slct The N operand that is a select.
7059 // @param OtherOp The other N operand (x above).
7060 // @param DCI Context.
7061 // @param AllOnes Require the select constant to be all ones instead of null.
7062 // @returns The new node, or SDValue() on failure.
7064 SDValue combineSelectAndUse(SDNode *N, SDValue Slct, SDValue OtherOp,
7065 TargetLowering::DAGCombinerInfo &DCI,
7066 bool AllOnes = false) {
7067 SelectionDAG &DAG = DCI.DAG;
7068 EVT VT = N->getValueType(0);
7069 SDValue NonConstantVal;
7072 if (!isConditionalZeroOrAllOnes(Slct.getNode(), AllOnes, CCOp, SwapSelectOps,
7073 NonConstantVal, DAG))
7076 // Slct is now know to be the desired identity constant when CC is true.
7077 SDValue TrueVal = OtherOp;
7078 SDValue FalseVal = DAG.getNode(N->getOpcode(), N->getDebugLoc(), VT,
7079 OtherOp, NonConstantVal);
7080 // Unless SwapSelectOps says CC should be false.
7082 std::swap(TrueVal, FalseVal);
7084 return DAG.getNode(ISD::SELECT, N->getDebugLoc(), VT,
7085 CCOp, TrueVal, FalseVal);
7088 // Attempt combineSelectAndUse on each operand of a commutative operator N.
7090 SDValue combineSelectAndUseCommutative(SDNode *N, bool AllOnes,
7091 TargetLowering::DAGCombinerInfo &DCI) {
7092 SDValue N0 = N->getOperand(0);
7093 SDValue N1 = N->getOperand(1);
7094 if (N0.getNode()->hasOneUse()) {
7095 SDValue Result = combineSelectAndUse(N, N0, N1, DCI, AllOnes);
7096 if (Result.getNode())
7099 if (N1.getNode()->hasOneUse()) {
7100 SDValue Result = combineSelectAndUse(N, N1, N0, DCI, AllOnes);
7101 if (Result.getNode())
7107 // AddCombineToVPADDL- For pair-wise add on neon, use the vpaddl instruction
7108 // (only after legalization).
7109 static SDValue AddCombineToVPADDL(SDNode *N, SDValue N0, SDValue N1,
7110 TargetLowering::DAGCombinerInfo &DCI,
7111 const ARMSubtarget *Subtarget) {
7113 // Only perform optimization if after legalize, and if NEON is available. We
7114 // also expected both operands to be BUILD_VECTORs.
7115 if (DCI.isBeforeLegalize() || !Subtarget->hasNEON()
7116 || N0.getOpcode() != ISD::BUILD_VECTOR
7117 || N1.getOpcode() != ISD::BUILD_VECTOR)
7120 // Check output type since VPADDL operand elements can only be 8, 16, or 32.
7121 EVT VT = N->getValueType(0);
7122 if (!VT.isInteger() || VT.getVectorElementType() == MVT::i64)
7125 // Check that the vector operands are of the right form.
7126 // N0 and N1 are BUILD_VECTOR nodes with N number of EXTRACT_VECTOR
7127 // operands, where N is the size of the formed vector.
7128 // Each EXTRACT_VECTOR should have the same input vector and odd or even
7129 // index such that we have a pair wise add pattern.
7131 // Grab the vector that all EXTRACT_VECTOR nodes should be referencing.
7132 if (N0->getOperand(0)->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
7134 SDValue Vec = N0->getOperand(0)->getOperand(0);
7135 SDNode *V = Vec.getNode();
7136 unsigned nextIndex = 0;
7138 // For each operands to the ADD which are BUILD_VECTORs,
7139 // check to see if each of their operands are an EXTRACT_VECTOR with
7140 // the same vector and appropriate index.
7141 for (unsigned i = 0, e = N0->getNumOperands(); i != e; ++i) {
7142 if (N0->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT
7143 && N1->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
7145 SDValue ExtVec0 = N0->getOperand(i);
7146 SDValue ExtVec1 = N1->getOperand(i);
7148 // First operand is the vector, verify its the same.
7149 if (V != ExtVec0->getOperand(0).getNode() ||
7150 V != ExtVec1->getOperand(0).getNode())
7153 // Second is the constant, verify its correct.
7154 ConstantSDNode *C0 = dyn_cast<ConstantSDNode>(ExtVec0->getOperand(1));
7155 ConstantSDNode *C1 = dyn_cast<ConstantSDNode>(ExtVec1->getOperand(1));
7157 // For the constant, we want to see all the even or all the odd.
7158 if (!C0 || !C1 || C0->getZExtValue() != nextIndex
7159 || C1->getZExtValue() != nextIndex+1)
7168 // Create VPADDL node.
7169 SelectionDAG &DAG = DCI.DAG;
7170 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
7172 // Build operand list.
7173 SmallVector<SDValue, 8> Ops;
7174 Ops.push_back(DAG.getConstant(Intrinsic::arm_neon_vpaddls,
7175 TLI.getPointerTy()));
7177 // Input is the vector.
7180 // Get widened type and narrowed type.
7182 unsigned numElem = VT.getVectorNumElements();
7183 switch (VT.getVectorElementType().getSimpleVT().SimpleTy) {
7184 case MVT::i8: widenType = MVT::getVectorVT(MVT::i16, numElem); break;
7185 case MVT::i16: widenType = MVT::getVectorVT(MVT::i32, numElem); break;
7186 case MVT::i32: widenType = MVT::getVectorVT(MVT::i64, numElem); break;
7188 llvm_unreachable("Invalid vector element type for padd optimization.");
7191 SDValue tmp = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, N->getDebugLoc(),
7192 widenType, &Ops[0], Ops.size());
7193 return DAG.getNode(ISD::TRUNCATE, N->getDebugLoc(), VT, tmp);
7196 /// PerformADDCombineWithOperands - Try DAG combinations for an ADD with
7197 /// operands N0 and N1. This is a helper for PerformADDCombine that is
7198 /// called with the default operands, and if that fails, with commuted
7200 static SDValue PerformADDCombineWithOperands(SDNode *N, SDValue N0, SDValue N1,
7201 TargetLowering::DAGCombinerInfo &DCI,
7202 const ARMSubtarget *Subtarget){
7204 // Attempt to create vpaddl for this add.
7205 SDValue Result = AddCombineToVPADDL(N, N0, N1, DCI, Subtarget);
7206 if (Result.getNode())
7209 // fold (add (select cc, 0, c), x) -> (select cc, x, (add, x, c))
7210 if (N0.getNode()->hasOneUse()) {
7211 SDValue Result = combineSelectAndUse(N, N0, N1, DCI);
7212 if (Result.getNode()) return Result;
7217 /// PerformADDCombine - Target-specific dag combine xforms for ISD::ADD.
7219 static SDValue PerformADDCombine(SDNode *N,
7220 TargetLowering::DAGCombinerInfo &DCI,
7221 const ARMSubtarget *Subtarget) {
7222 SDValue N0 = N->getOperand(0);
7223 SDValue N1 = N->getOperand(1);
7225 // First try with the default operand order.
7226 SDValue Result = PerformADDCombineWithOperands(N, N0, N1, DCI, Subtarget);
7227 if (Result.getNode())
7230 // If that didn't work, try again with the operands commuted.
7231 return PerformADDCombineWithOperands(N, N1, N0, DCI, Subtarget);
7234 /// PerformSUBCombine - Target-specific dag combine xforms for ISD::SUB.
7236 static SDValue PerformSUBCombine(SDNode *N,
7237 TargetLowering::DAGCombinerInfo &DCI) {
7238 SDValue N0 = N->getOperand(0);
7239 SDValue N1 = N->getOperand(1);
7241 // fold (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c))
7242 if (N1.getNode()->hasOneUse()) {
7243 SDValue Result = combineSelectAndUse(N, N1, N0, DCI);
7244 if (Result.getNode()) return Result;
7250 /// PerformVMULCombine
7251 /// Distribute (A + B) * C to (A * C) + (B * C) to take advantage of the
7252 /// special multiplier accumulator forwarding.
7258 static SDValue PerformVMULCombine(SDNode *N,
7259 TargetLowering::DAGCombinerInfo &DCI,
7260 const ARMSubtarget *Subtarget) {
7261 if (!Subtarget->hasVMLxForwarding())
7264 SelectionDAG &DAG = DCI.DAG;
7265 SDValue N0 = N->getOperand(0);
7266 SDValue N1 = N->getOperand(1);
7267 unsigned Opcode = N0.getOpcode();
7268 if (Opcode != ISD::ADD && Opcode != ISD::SUB &&
7269 Opcode != ISD::FADD && Opcode != ISD::FSUB) {
7270 Opcode = N1.getOpcode();
7271 if (Opcode != ISD::ADD && Opcode != ISD::SUB &&
7272 Opcode != ISD::FADD && Opcode != ISD::FSUB)
7277 EVT VT = N->getValueType(0);
7278 DebugLoc DL = N->getDebugLoc();
7279 SDValue N00 = N0->getOperand(0);
7280 SDValue N01 = N0->getOperand(1);
7281 return DAG.getNode(Opcode, DL, VT,
7282 DAG.getNode(ISD::MUL, DL, VT, N00, N1),
7283 DAG.getNode(ISD::MUL, DL, VT, N01, N1));
7286 static SDValue PerformMULCombine(SDNode *N,
7287 TargetLowering::DAGCombinerInfo &DCI,
7288 const ARMSubtarget *Subtarget) {
7289 SelectionDAG &DAG = DCI.DAG;
7291 if (Subtarget->isThumb1Only())
7294 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
7297 EVT VT = N->getValueType(0);
7298 if (VT.is64BitVector() || VT.is128BitVector())
7299 return PerformVMULCombine(N, DCI, Subtarget);
7303 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
7307 int64_t MulAmt = C->getSExtValue();
7308 unsigned ShiftAmt = CountTrailingZeros_64(MulAmt);
7310 ShiftAmt = ShiftAmt & (32 - 1);
7311 SDValue V = N->getOperand(0);
7312 DebugLoc DL = N->getDebugLoc();
7315 MulAmt >>= ShiftAmt;
7318 if (isPowerOf2_32(MulAmt - 1)) {
7319 // (mul x, 2^N + 1) => (add (shl x, N), x)
7320 Res = DAG.getNode(ISD::ADD, DL, VT,
7322 DAG.getNode(ISD::SHL, DL, VT,
7324 DAG.getConstant(Log2_32(MulAmt - 1),
7326 } else if (isPowerOf2_32(MulAmt + 1)) {
7327 // (mul x, 2^N - 1) => (sub (shl x, N), x)
7328 Res = DAG.getNode(ISD::SUB, DL, VT,
7329 DAG.getNode(ISD::SHL, DL, VT,
7331 DAG.getConstant(Log2_32(MulAmt + 1),
7337 uint64_t MulAmtAbs = -MulAmt;
7338 if (isPowerOf2_32(MulAmtAbs + 1)) {
7339 // (mul x, -(2^N - 1)) => (sub x, (shl x, N))
7340 Res = DAG.getNode(ISD::SUB, DL, VT,
7342 DAG.getNode(ISD::SHL, DL, VT,
7344 DAG.getConstant(Log2_32(MulAmtAbs + 1),
7346 } else if (isPowerOf2_32(MulAmtAbs - 1)) {
7347 // (mul x, -(2^N + 1)) => - (add (shl x, N), x)
7348 Res = DAG.getNode(ISD::ADD, DL, VT,
7350 DAG.getNode(ISD::SHL, DL, VT,
7352 DAG.getConstant(Log2_32(MulAmtAbs-1),
7354 Res = DAG.getNode(ISD::SUB, DL, VT,
7355 DAG.getConstant(0, MVT::i32),Res);
7362 Res = DAG.getNode(ISD::SHL, DL, VT,
7363 Res, DAG.getConstant(ShiftAmt, MVT::i32));
7365 // Do not add new nodes to DAG combiner worklist.
7366 DCI.CombineTo(N, Res, false);
7370 static SDValue PerformANDCombine(SDNode *N,
7371 TargetLowering::DAGCombinerInfo &DCI,
7372 const ARMSubtarget *Subtarget) {
7374 // Attempt to use immediate-form VBIC
7375 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1));
7376 DebugLoc dl = N->getDebugLoc();
7377 EVT VT = N->getValueType(0);
7378 SelectionDAG &DAG = DCI.DAG;
7380 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
7383 APInt SplatBits, SplatUndef;
7384 unsigned SplatBitSize;
7387 BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
7388 if (SplatBitSize <= 64) {
7390 SDValue Val = isNEONModifiedImm((~SplatBits).getZExtValue(),
7391 SplatUndef.getZExtValue(), SplatBitSize,
7392 DAG, VbicVT, VT.is128BitVector(),
7394 if (Val.getNode()) {
7396 DAG.getNode(ISD::BITCAST, dl, VbicVT, N->getOperand(0));
7397 SDValue Vbic = DAG.getNode(ARMISD::VBICIMM, dl, VbicVT, Input, Val);
7398 return DAG.getNode(ISD::BITCAST, dl, VT, Vbic);
7403 if (!Subtarget->isThumb1Only()) {
7404 // fold (and (select cc, -1, c), x) -> (select cc, x, (and, x, c))
7405 SDValue Result = combineSelectAndUseCommutative(N, true, DCI);
7406 if (Result.getNode())
7413 /// PerformORCombine - Target-specific dag combine xforms for ISD::OR
7414 static SDValue PerformORCombine(SDNode *N,
7415 TargetLowering::DAGCombinerInfo &DCI,
7416 const ARMSubtarget *Subtarget) {
7417 // Attempt to use immediate-form VORR
7418 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1));
7419 DebugLoc dl = N->getDebugLoc();
7420 EVT VT = N->getValueType(0);
7421 SelectionDAG &DAG = DCI.DAG;
7423 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
7426 APInt SplatBits, SplatUndef;
7427 unsigned SplatBitSize;
7429 if (BVN && Subtarget->hasNEON() &&
7430 BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
7431 if (SplatBitSize <= 64) {
7433 SDValue Val = isNEONModifiedImm(SplatBits.getZExtValue(),
7434 SplatUndef.getZExtValue(), SplatBitSize,
7435 DAG, VorrVT, VT.is128BitVector(),
7437 if (Val.getNode()) {
7439 DAG.getNode(ISD::BITCAST, dl, VorrVT, N->getOperand(0));
7440 SDValue Vorr = DAG.getNode(ARMISD::VORRIMM, dl, VorrVT, Input, Val);
7441 return DAG.getNode(ISD::BITCAST, dl, VT, Vorr);
7446 if (!Subtarget->isThumb1Only()) {
7447 // fold (or (select cc, 0, c), x) -> (select cc, x, (or, x, c))
7448 SDValue Result = combineSelectAndUseCommutative(N, false, DCI);
7449 if (Result.getNode())
7453 // The code below optimizes (or (and X, Y), Z).
7454 // The AND operand needs to have a single user to make these optimizations
7456 SDValue N0 = N->getOperand(0);
7457 if (N0.getOpcode() != ISD::AND || !N0.hasOneUse())
7459 SDValue N1 = N->getOperand(1);
7461 // (or (and B, A), (and C, ~A)) => (VBSL A, B, C) when A is a constant.
7462 if (Subtarget->hasNEON() && N1.getOpcode() == ISD::AND && VT.isVector() &&
7463 DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
7465 unsigned SplatBitSize;
7468 BuildVectorSDNode *BVN0 = dyn_cast<BuildVectorSDNode>(N0->getOperand(1));
7470 if (BVN0 && BVN0->isConstantSplat(SplatBits0, SplatUndef, SplatBitSize,
7471 HasAnyUndefs) && !HasAnyUndefs) {
7472 BuildVectorSDNode *BVN1 = dyn_cast<BuildVectorSDNode>(N1->getOperand(1));
7474 if (BVN1 && BVN1->isConstantSplat(SplatBits1, SplatUndef, SplatBitSize,
7475 HasAnyUndefs) && !HasAnyUndefs &&
7476 SplatBits0 == ~SplatBits1) {
7477 // Canonicalize the vector type to make instruction selection simpler.
7478 EVT CanonicalVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32;
7479 SDValue Result = DAG.getNode(ARMISD::VBSL, dl, CanonicalVT,
7480 N0->getOperand(1), N0->getOperand(0),
7482 return DAG.getNode(ISD::BITCAST, dl, VT, Result);
7487 // Try to use the ARM/Thumb2 BFI (bitfield insert) instruction when
7490 // BFI is only available on V6T2+
7491 if (Subtarget->isThumb1Only() || !Subtarget->hasV6T2Ops())
7494 DebugLoc DL = N->getDebugLoc();
7495 // 1) or (and A, mask), val => ARMbfi A, val, mask
7496 // iff (val & mask) == val
7498 // 2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
7499 // 2a) iff isBitFieldInvertedMask(mask) && isBitFieldInvertedMask(~mask2)
7500 // && mask == ~mask2
7501 // 2b) iff isBitFieldInvertedMask(~mask) && isBitFieldInvertedMask(mask2)
7502 // && ~mask == mask2
7503 // (i.e., copy a bitfield value into another bitfield of the same width)
7508 SDValue N00 = N0.getOperand(0);
7510 // The value and the mask need to be constants so we can verify this is
7511 // actually a bitfield set. If the mask is 0xffff, we can do better
7512 // via a movt instruction, so don't use BFI in that case.
7513 SDValue MaskOp = N0.getOperand(1);
7514 ConstantSDNode *MaskC = dyn_cast<ConstantSDNode>(MaskOp);
7517 unsigned Mask = MaskC->getZExtValue();
7521 // Case (1): or (and A, mask), val => ARMbfi A, val, mask
7522 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
7524 unsigned Val = N1C->getZExtValue();
7525 if ((Val & ~Mask) != Val)
7528 if (ARM::isBitFieldInvertedMask(Mask)) {
7529 Val >>= CountTrailingZeros_32(~Mask);
7531 Res = DAG.getNode(ARMISD::BFI, DL, VT, N00,
7532 DAG.getConstant(Val, MVT::i32),
7533 DAG.getConstant(Mask, MVT::i32));
7535 // Do not add new nodes to DAG combiner worklist.
7536 DCI.CombineTo(N, Res, false);
7539 } else if (N1.getOpcode() == ISD::AND) {
7540 // case (2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
7541 ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1));
7544 unsigned Mask2 = N11C->getZExtValue();
7546 // Mask and ~Mask2 (or reverse) must be equivalent for the BFI pattern
7548 if (ARM::isBitFieldInvertedMask(Mask) &&
7550 // The pack halfword instruction works better for masks that fit it,
7551 // so use that when it's available.
7552 if (Subtarget->hasT2ExtractPack() &&
7553 (Mask == 0xffff || Mask == 0xffff0000))
7556 unsigned amt = CountTrailingZeros_32(Mask2);
7557 Res = DAG.getNode(ISD::SRL, DL, VT, N1.getOperand(0),
7558 DAG.getConstant(amt, MVT::i32));
7559 Res = DAG.getNode(ARMISD::BFI, DL, VT, N00, Res,
7560 DAG.getConstant(Mask, MVT::i32));
7561 // Do not add new nodes to DAG combiner worklist.
7562 DCI.CombineTo(N, Res, false);
7564 } else if (ARM::isBitFieldInvertedMask(~Mask) &&
7566 // The pack halfword instruction works better for masks that fit it,
7567 // so use that when it's available.
7568 if (Subtarget->hasT2ExtractPack() &&
7569 (Mask2 == 0xffff || Mask2 == 0xffff0000))
7572 unsigned lsb = CountTrailingZeros_32(Mask);
7573 Res = DAG.getNode(ISD::SRL, DL, VT, N00,
7574 DAG.getConstant(lsb, MVT::i32));
7575 Res = DAG.getNode(ARMISD::BFI, DL, VT, N1.getOperand(0), Res,
7576 DAG.getConstant(Mask2, MVT::i32));
7577 // Do not add new nodes to DAG combiner worklist.
7578 DCI.CombineTo(N, Res, false);
7583 if (DAG.MaskedValueIsZero(N1, MaskC->getAPIntValue()) &&
7584 N00.getOpcode() == ISD::SHL && isa<ConstantSDNode>(N00.getOperand(1)) &&
7585 ARM::isBitFieldInvertedMask(~Mask)) {
7586 // Case (3): or (and (shl A, #shamt), mask), B => ARMbfi B, A, ~mask
7587 // where lsb(mask) == #shamt and masked bits of B are known zero.
7588 SDValue ShAmt = N00.getOperand(1);
7589 unsigned ShAmtC = cast<ConstantSDNode>(ShAmt)->getZExtValue();
7590 unsigned LSB = CountTrailingZeros_32(Mask);
7594 Res = DAG.getNode(ARMISD::BFI, DL, VT, N1, N00.getOperand(0),
7595 DAG.getConstant(~Mask, MVT::i32));
7597 // Do not add new nodes to DAG combiner worklist.
7598 DCI.CombineTo(N, Res, false);
7604 static SDValue PerformXORCombine(SDNode *N,
7605 TargetLowering::DAGCombinerInfo &DCI,
7606 const ARMSubtarget *Subtarget) {
7607 EVT VT = N->getValueType(0);
7608 SelectionDAG &DAG = DCI.DAG;
7610 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
7613 if (!Subtarget->isThumb1Only()) {
7614 // fold (xor (select cc, 0, c), x) -> (select cc, x, (xor, x, c))
7615 SDValue Result = combineSelectAndUseCommutative(N, false, DCI);
7616 if (Result.getNode())
7623 /// PerformBFICombine - (bfi A, (and B, Mask1), Mask2) -> (bfi A, B, Mask2) iff
7624 /// the bits being cleared by the AND are not demanded by the BFI.
7625 static SDValue PerformBFICombine(SDNode *N,
7626 TargetLowering::DAGCombinerInfo &DCI) {
7627 SDValue N1 = N->getOperand(1);
7628 if (N1.getOpcode() == ISD::AND) {
7629 ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1));
7632 unsigned InvMask = cast<ConstantSDNode>(N->getOperand(2))->getZExtValue();
7633 unsigned LSB = CountTrailingZeros_32(~InvMask);
7634 unsigned Width = (32 - CountLeadingZeros_32(~InvMask)) - LSB;
7635 unsigned Mask = (1 << Width)-1;
7636 unsigned Mask2 = N11C->getZExtValue();
7637 if ((Mask & (~Mask2)) == 0)
7638 return DCI.DAG.getNode(ARMISD::BFI, N->getDebugLoc(), N->getValueType(0),
7639 N->getOperand(0), N1.getOperand(0),
7645 /// PerformVMOVRRDCombine - Target-specific dag combine xforms for
7646 /// ARMISD::VMOVRRD.
7647 static SDValue PerformVMOVRRDCombine(SDNode *N,
7648 TargetLowering::DAGCombinerInfo &DCI) {
7649 // vmovrrd(vmovdrr x, y) -> x,y
7650 SDValue InDouble = N->getOperand(0);
7651 if (InDouble.getOpcode() == ARMISD::VMOVDRR)
7652 return DCI.CombineTo(N, InDouble.getOperand(0), InDouble.getOperand(1));
7654 // vmovrrd(load f64) -> (load i32), (load i32)
7655 SDNode *InNode = InDouble.getNode();
7656 if (ISD::isNormalLoad(InNode) && InNode->hasOneUse() &&
7657 InNode->getValueType(0) == MVT::f64 &&
7658 InNode->getOperand(1).getOpcode() == ISD::FrameIndex &&
7659 !cast<LoadSDNode>(InNode)->isVolatile()) {
7660 // TODO: Should this be done for non-FrameIndex operands?
7661 LoadSDNode *LD = cast<LoadSDNode>(InNode);
7663 SelectionDAG &DAG = DCI.DAG;
7664 DebugLoc DL = LD->getDebugLoc();
7665 SDValue BasePtr = LD->getBasePtr();
7666 SDValue NewLD1 = DAG.getLoad(MVT::i32, DL, LD->getChain(), BasePtr,
7667 LD->getPointerInfo(), LD->isVolatile(),
7668 LD->isNonTemporal(), LD->isInvariant(),
7669 LD->getAlignment());
7671 SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr,
7672 DAG.getConstant(4, MVT::i32));
7673 SDValue NewLD2 = DAG.getLoad(MVT::i32, DL, NewLD1.getValue(1), OffsetPtr,
7674 LD->getPointerInfo(), LD->isVolatile(),
7675 LD->isNonTemporal(), LD->isInvariant(),
7676 std::min(4U, LD->getAlignment() / 2));
7678 DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 1), NewLD2.getValue(1));
7679 SDValue Result = DCI.CombineTo(N, NewLD1, NewLD2);
7680 DCI.RemoveFromWorklist(LD);
7688 /// PerformVMOVDRRCombine - Target-specific dag combine xforms for
7689 /// ARMISD::VMOVDRR. This is also used for BUILD_VECTORs with 2 operands.
7690 static SDValue PerformVMOVDRRCombine(SDNode *N, SelectionDAG &DAG) {
7691 // N=vmovrrd(X); vmovdrr(N:0, N:1) -> bit_convert(X)
7692 SDValue Op0 = N->getOperand(0);
7693 SDValue Op1 = N->getOperand(1);
7694 if (Op0.getOpcode() == ISD::BITCAST)
7695 Op0 = Op0.getOperand(0);
7696 if (Op1.getOpcode() == ISD::BITCAST)
7697 Op1 = Op1.getOperand(0);
7698 if (Op0.getOpcode() == ARMISD::VMOVRRD &&
7699 Op0.getNode() == Op1.getNode() &&
7700 Op0.getResNo() == 0 && Op1.getResNo() == 1)
7701 return DAG.getNode(ISD::BITCAST, N->getDebugLoc(),
7702 N->getValueType(0), Op0.getOperand(0));
7706 /// PerformSTORECombine - Target-specific dag combine xforms for
7708 static SDValue PerformSTORECombine(SDNode *N,
7709 TargetLowering::DAGCombinerInfo &DCI) {
7710 StoreSDNode *St = cast<StoreSDNode>(N);
7711 if (St->isVolatile())
7714 // Optimize trunc store (of multiple scalars) to shuffle and store. First,
7715 // pack all of the elements in one place. Next, store to memory in fewer
7717 SDValue StVal = St->getValue();
7718 EVT VT = StVal.getValueType();
7719 if (St->isTruncatingStore() && VT.isVector()) {
7720 SelectionDAG &DAG = DCI.DAG;
7721 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
7722 EVT StVT = St->getMemoryVT();
7723 unsigned NumElems = VT.getVectorNumElements();
7724 assert(StVT != VT && "Cannot truncate to the same type");
7725 unsigned FromEltSz = VT.getVectorElementType().getSizeInBits();
7726 unsigned ToEltSz = StVT.getVectorElementType().getSizeInBits();
7728 // From, To sizes and ElemCount must be pow of two
7729 if (!isPowerOf2_32(NumElems * FromEltSz * ToEltSz)) return SDValue();
7731 // We are going to use the original vector elt for storing.
7732 // Accumulated smaller vector elements must be a multiple of the store size.
7733 if (0 != (NumElems * FromEltSz) % ToEltSz) return SDValue();
7735 unsigned SizeRatio = FromEltSz / ToEltSz;
7736 assert(SizeRatio * NumElems * ToEltSz == VT.getSizeInBits());
7738 // Create a type on which we perform the shuffle.
7739 EVT WideVecVT = EVT::getVectorVT(*DAG.getContext(), StVT.getScalarType(),
7740 NumElems*SizeRatio);
7741 assert(WideVecVT.getSizeInBits() == VT.getSizeInBits());
7743 DebugLoc DL = St->getDebugLoc();
7744 SDValue WideVec = DAG.getNode(ISD::BITCAST, DL, WideVecVT, StVal);
7745 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
7746 for (unsigned i = 0; i < NumElems; ++i) ShuffleVec[i] = i * SizeRatio;
7748 // Can't shuffle using an illegal type.
7749 if (!TLI.isTypeLegal(WideVecVT)) return SDValue();
7751 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, DL, WideVec,
7752 DAG.getUNDEF(WideVec.getValueType()),
7754 // At this point all of the data is stored at the bottom of the
7755 // register. We now need to save it to mem.
7757 // Find the largest store unit
7758 MVT StoreType = MVT::i8;
7759 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
7760 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
7761 MVT Tp = (MVT::SimpleValueType)tp;
7762 if (TLI.isTypeLegal(Tp) && Tp.getSizeInBits() <= NumElems * ToEltSz)
7765 // Didn't find a legal store type.
7766 if (!TLI.isTypeLegal(StoreType))
7769 // Bitcast the original vector into a vector of store-size units
7770 EVT StoreVecVT = EVT::getVectorVT(*DAG.getContext(),
7771 StoreType, VT.getSizeInBits()/EVT(StoreType).getSizeInBits());
7772 assert(StoreVecVT.getSizeInBits() == VT.getSizeInBits());
7773 SDValue ShuffWide = DAG.getNode(ISD::BITCAST, DL, StoreVecVT, Shuff);
7774 SmallVector<SDValue, 8> Chains;
7775 SDValue Increment = DAG.getConstant(StoreType.getSizeInBits()/8,
7776 TLI.getPointerTy());
7777 SDValue BasePtr = St->getBasePtr();
7779 // Perform one or more big stores into memory.
7780 unsigned E = (ToEltSz*NumElems)/StoreType.getSizeInBits();
7781 for (unsigned I = 0; I < E; I++) {
7782 SDValue SubVec = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL,
7783 StoreType, ShuffWide,
7784 DAG.getIntPtrConstant(I));
7785 SDValue Ch = DAG.getStore(St->getChain(), DL, SubVec, BasePtr,
7786 St->getPointerInfo(), St->isVolatile(),
7787 St->isNonTemporal(), St->getAlignment());
7788 BasePtr = DAG.getNode(ISD::ADD, DL, BasePtr.getValueType(), BasePtr,
7790 Chains.push_back(Ch);
7792 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, &Chains[0],
7796 if (!ISD::isNormalStore(St))
7799 // Split a store of a VMOVDRR into two integer stores to avoid mixing NEON and
7800 // ARM stores of arguments in the same cache line.
7801 if (StVal.getNode()->getOpcode() == ARMISD::VMOVDRR &&
7802 StVal.getNode()->hasOneUse()) {
7803 SelectionDAG &DAG = DCI.DAG;
7804 DebugLoc DL = St->getDebugLoc();
7805 SDValue BasePtr = St->getBasePtr();
7806 SDValue NewST1 = DAG.getStore(St->getChain(), DL,
7807 StVal.getNode()->getOperand(0), BasePtr,
7808 St->getPointerInfo(), St->isVolatile(),
7809 St->isNonTemporal(), St->getAlignment());
7811 SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr,
7812 DAG.getConstant(4, MVT::i32));
7813 return DAG.getStore(NewST1.getValue(0), DL, StVal.getNode()->getOperand(1),
7814 OffsetPtr, St->getPointerInfo(), St->isVolatile(),
7815 St->isNonTemporal(),
7816 std::min(4U, St->getAlignment() / 2));
7819 if (StVal.getValueType() != MVT::i64 ||
7820 StVal.getNode()->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
7823 // Bitcast an i64 store extracted from a vector to f64.
7824 // Otherwise, the i64 value will be legalized to a pair of i32 values.
7825 SelectionDAG &DAG = DCI.DAG;
7826 DebugLoc dl = StVal.getDebugLoc();
7827 SDValue IntVec = StVal.getOperand(0);
7828 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64,
7829 IntVec.getValueType().getVectorNumElements());
7830 SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, IntVec);
7831 SDValue ExtElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
7832 Vec, StVal.getOperand(1));
7833 dl = N->getDebugLoc();
7834 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ExtElt);
7835 // Make the DAGCombiner fold the bitcasts.
7836 DCI.AddToWorklist(Vec.getNode());
7837 DCI.AddToWorklist(ExtElt.getNode());
7838 DCI.AddToWorklist(V.getNode());
7839 return DAG.getStore(St->getChain(), dl, V, St->getBasePtr(),
7840 St->getPointerInfo(), St->isVolatile(),
7841 St->isNonTemporal(), St->getAlignment(),
7845 /// hasNormalLoadOperand - Check if any of the operands of a BUILD_VECTOR node
7846 /// are normal, non-volatile loads. If so, it is profitable to bitcast an
7847 /// i64 vector to have f64 elements, since the value can then be loaded
7848 /// directly into a VFP register.
7849 static bool hasNormalLoadOperand(SDNode *N) {
7850 unsigned NumElts = N->getValueType(0).getVectorNumElements();
7851 for (unsigned i = 0; i < NumElts; ++i) {
7852 SDNode *Elt = N->getOperand(i).getNode();
7853 if (ISD::isNormalLoad(Elt) && !cast<LoadSDNode>(Elt)->isVolatile())
7859 /// PerformBUILD_VECTORCombine - Target-specific dag combine xforms for
7860 /// ISD::BUILD_VECTOR.
7861 static SDValue PerformBUILD_VECTORCombine(SDNode *N,
7862 TargetLowering::DAGCombinerInfo &DCI){
7863 // build_vector(N=ARMISD::VMOVRRD(X), N:1) -> bit_convert(X):
7864 // VMOVRRD is introduced when legalizing i64 types. It forces the i64 value
7865 // into a pair of GPRs, which is fine when the value is used as a scalar,
7866 // but if the i64 value is converted to a vector, we need to undo the VMOVRRD.
7867 SelectionDAG &DAG = DCI.DAG;
7868 if (N->getNumOperands() == 2) {
7869 SDValue RV = PerformVMOVDRRCombine(N, DAG);
7874 // Load i64 elements as f64 values so that type legalization does not split
7875 // them up into i32 values.
7876 EVT VT = N->getValueType(0);
7877 if (VT.getVectorElementType() != MVT::i64 || !hasNormalLoadOperand(N))
7879 DebugLoc dl = N->getDebugLoc();
7880 SmallVector<SDValue, 8> Ops;
7881 unsigned NumElts = VT.getVectorNumElements();
7882 for (unsigned i = 0; i < NumElts; ++i) {
7883 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(i));
7885 // Make the DAGCombiner fold the bitcast.
7886 DCI.AddToWorklist(V.getNode());
7888 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64, NumElts);
7889 SDValue BV = DAG.getNode(ISD::BUILD_VECTOR, dl, FloatVT, Ops.data(), NumElts);
7890 return DAG.getNode(ISD::BITCAST, dl, VT, BV);
7893 /// PerformInsertEltCombine - Target-specific dag combine xforms for
7894 /// ISD::INSERT_VECTOR_ELT.
7895 static SDValue PerformInsertEltCombine(SDNode *N,
7896 TargetLowering::DAGCombinerInfo &DCI) {
7897 // Bitcast an i64 load inserted into a vector to f64.
7898 // Otherwise, the i64 value will be legalized to a pair of i32 values.
7899 EVT VT = N->getValueType(0);
7900 SDNode *Elt = N->getOperand(1).getNode();
7901 if (VT.getVectorElementType() != MVT::i64 ||
7902 !ISD::isNormalLoad(Elt) || cast<LoadSDNode>(Elt)->isVolatile())
7905 SelectionDAG &DAG = DCI.DAG;
7906 DebugLoc dl = N->getDebugLoc();
7907 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64,
7908 VT.getVectorNumElements());
7909 SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, N->getOperand(0));
7910 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(1));
7911 // Make the DAGCombiner fold the bitcasts.
7912 DCI.AddToWorklist(Vec.getNode());
7913 DCI.AddToWorklist(V.getNode());
7914 SDValue InsElt = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, FloatVT,
7915 Vec, V, N->getOperand(2));
7916 return DAG.getNode(ISD::BITCAST, dl, VT, InsElt);
7919 /// PerformVECTOR_SHUFFLECombine - Target-specific dag combine xforms for
7920 /// ISD::VECTOR_SHUFFLE.
7921 static SDValue PerformVECTOR_SHUFFLECombine(SDNode *N, SelectionDAG &DAG) {
7922 // The LLVM shufflevector instruction does not require the shuffle mask
7923 // length to match the operand vector length, but ISD::VECTOR_SHUFFLE does
7924 // have that requirement. When translating to ISD::VECTOR_SHUFFLE, if the
7925 // operands do not match the mask length, they are extended by concatenating
7926 // them with undef vectors. That is probably the right thing for other
7927 // targets, but for NEON it is better to concatenate two double-register
7928 // size vector operands into a single quad-register size vector. Do that
7929 // transformation here:
7930 // shuffle(concat(v1, undef), concat(v2, undef)) ->
7931 // shuffle(concat(v1, v2), undef)
7932 SDValue Op0 = N->getOperand(0);
7933 SDValue Op1 = N->getOperand(1);
7934 if (Op0.getOpcode() != ISD::CONCAT_VECTORS ||
7935 Op1.getOpcode() != ISD::CONCAT_VECTORS ||
7936 Op0.getNumOperands() != 2 ||
7937 Op1.getNumOperands() != 2)
7939 SDValue Concat0Op1 = Op0.getOperand(1);
7940 SDValue Concat1Op1 = Op1.getOperand(1);
7941 if (Concat0Op1.getOpcode() != ISD::UNDEF ||
7942 Concat1Op1.getOpcode() != ISD::UNDEF)
7944 // Skip the transformation if any of the types are illegal.
7945 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
7946 EVT VT = N->getValueType(0);
7947 if (!TLI.isTypeLegal(VT) ||
7948 !TLI.isTypeLegal(Concat0Op1.getValueType()) ||
7949 !TLI.isTypeLegal(Concat1Op1.getValueType()))
7952 SDValue NewConcat = DAG.getNode(ISD::CONCAT_VECTORS, N->getDebugLoc(), VT,
7953 Op0.getOperand(0), Op1.getOperand(0));
7954 // Translate the shuffle mask.
7955 SmallVector<int, 16> NewMask;
7956 unsigned NumElts = VT.getVectorNumElements();
7957 unsigned HalfElts = NumElts/2;
7958 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(N);
7959 for (unsigned n = 0; n < NumElts; ++n) {
7960 int MaskElt = SVN->getMaskElt(n);
7962 if (MaskElt < (int)HalfElts)
7964 else if (MaskElt >= (int)NumElts && MaskElt < (int)(NumElts + HalfElts))
7965 NewElt = HalfElts + MaskElt - NumElts;
7966 NewMask.push_back(NewElt);
7968 return DAG.getVectorShuffle(VT, N->getDebugLoc(), NewConcat,
7969 DAG.getUNDEF(VT), NewMask.data());
7972 /// CombineBaseUpdate - Target-specific DAG combine function for VLDDUP and
7973 /// NEON load/store intrinsics to merge base address updates.
7974 static SDValue CombineBaseUpdate(SDNode *N,
7975 TargetLowering::DAGCombinerInfo &DCI) {
7976 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
7979 SelectionDAG &DAG = DCI.DAG;
7980 bool isIntrinsic = (N->getOpcode() == ISD::INTRINSIC_VOID ||
7981 N->getOpcode() == ISD::INTRINSIC_W_CHAIN);
7982 unsigned AddrOpIdx = (isIntrinsic ? 2 : 1);
7983 SDValue Addr = N->getOperand(AddrOpIdx);
7985 // Search for a use of the address operand that is an increment.
7986 for (SDNode::use_iterator UI = Addr.getNode()->use_begin(),
7987 UE = Addr.getNode()->use_end(); UI != UE; ++UI) {
7989 if (User->getOpcode() != ISD::ADD ||
7990 UI.getUse().getResNo() != Addr.getResNo())
7993 // Check that the add is independent of the load/store. Otherwise, folding
7994 // it would create a cycle.
7995 if (User->isPredecessorOf(N) || N->isPredecessorOf(User))
7998 // Find the new opcode for the updating load/store.
8000 bool isLaneOp = false;
8001 unsigned NewOpc = 0;
8002 unsigned NumVecs = 0;
8004 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue();
8006 default: llvm_unreachable("unexpected intrinsic for Neon base update");
8007 case Intrinsic::arm_neon_vld1: NewOpc = ARMISD::VLD1_UPD;
8009 case Intrinsic::arm_neon_vld2: NewOpc = ARMISD::VLD2_UPD;
8011 case Intrinsic::arm_neon_vld3: NewOpc = ARMISD::VLD3_UPD;
8013 case Intrinsic::arm_neon_vld4: NewOpc = ARMISD::VLD4_UPD;
8015 case Intrinsic::arm_neon_vld2lane: NewOpc = ARMISD::VLD2LN_UPD;
8016 NumVecs = 2; isLaneOp = true; break;
8017 case Intrinsic::arm_neon_vld3lane: NewOpc = ARMISD::VLD3LN_UPD;
8018 NumVecs = 3; isLaneOp = true; break;
8019 case Intrinsic::arm_neon_vld4lane: NewOpc = ARMISD::VLD4LN_UPD;
8020 NumVecs = 4; isLaneOp = true; break;
8021 case Intrinsic::arm_neon_vst1: NewOpc = ARMISD::VST1_UPD;
8022 NumVecs = 1; isLoad = false; break;
8023 case Intrinsic::arm_neon_vst2: NewOpc = ARMISD::VST2_UPD;
8024 NumVecs = 2; isLoad = false; break;
8025 case Intrinsic::arm_neon_vst3: NewOpc = ARMISD::VST3_UPD;
8026 NumVecs = 3; isLoad = false; break;
8027 case Intrinsic::arm_neon_vst4: NewOpc = ARMISD::VST4_UPD;
8028 NumVecs = 4; isLoad = false; break;
8029 case Intrinsic::arm_neon_vst2lane: NewOpc = ARMISD::VST2LN_UPD;
8030 NumVecs = 2; isLoad = false; isLaneOp = true; break;
8031 case Intrinsic::arm_neon_vst3lane: NewOpc = ARMISD::VST3LN_UPD;
8032 NumVecs = 3; isLoad = false; isLaneOp = true; break;
8033 case Intrinsic::arm_neon_vst4lane: NewOpc = ARMISD::VST4LN_UPD;
8034 NumVecs = 4; isLoad = false; isLaneOp = true; break;
8038 switch (N->getOpcode()) {
8039 default: llvm_unreachable("unexpected opcode for Neon base update");
8040 case ARMISD::VLD2DUP: NewOpc = ARMISD::VLD2DUP_UPD; NumVecs = 2; break;
8041 case ARMISD::VLD3DUP: NewOpc = ARMISD::VLD3DUP_UPD; NumVecs = 3; break;
8042 case ARMISD::VLD4DUP: NewOpc = ARMISD::VLD4DUP_UPD; NumVecs = 4; break;
8046 // Find the size of memory referenced by the load/store.
8049 VecTy = N->getValueType(0);
8051 VecTy = N->getOperand(AddrOpIdx+1).getValueType();
8052 unsigned NumBytes = NumVecs * VecTy.getSizeInBits() / 8;
8054 NumBytes /= VecTy.getVectorNumElements();
8056 // If the increment is a constant, it must match the memory ref size.
8057 SDValue Inc = User->getOperand(User->getOperand(0) == Addr ? 1 : 0);
8058 if (ConstantSDNode *CInc = dyn_cast<ConstantSDNode>(Inc.getNode())) {
8059 uint64_t IncVal = CInc->getZExtValue();
8060 if (IncVal != NumBytes)
8062 } else if (NumBytes >= 3 * 16) {
8063 // VLD3/4 and VST3/4 for 128-bit vectors are implemented with two
8064 // separate instructions that make it harder to use a non-constant update.
8068 // Create the new updating load/store node.
8070 unsigned NumResultVecs = (isLoad ? NumVecs : 0);
8072 for (n = 0; n < NumResultVecs; ++n)
8074 Tys[n++] = MVT::i32;
8075 Tys[n] = MVT::Other;
8076 SDVTList SDTys = DAG.getVTList(Tys, NumResultVecs+2);
8077 SmallVector<SDValue, 8> Ops;
8078 Ops.push_back(N->getOperand(0)); // incoming chain
8079 Ops.push_back(N->getOperand(AddrOpIdx));
8081 for (unsigned i = AddrOpIdx + 1; i < N->getNumOperands(); ++i) {
8082 Ops.push_back(N->getOperand(i));
8084 MemIntrinsicSDNode *MemInt = cast<MemIntrinsicSDNode>(N);
8085 SDValue UpdN = DAG.getMemIntrinsicNode(NewOpc, N->getDebugLoc(), SDTys,
8086 Ops.data(), Ops.size(),
8087 MemInt->getMemoryVT(),
8088 MemInt->getMemOperand());
8091 std::vector<SDValue> NewResults;
8092 for (unsigned i = 0; i < NumResultVecs; ++i) {
8093 NewResults.push_back(SDValue(UpdN.getNode(), i));
8095 NewResults.push_back(SDValue(UpdN.getNode(), NumResultVecs+1)); // chain
8096 DCI.CombineTo(N, NewResults);
8097 DCI.CombineTo(User, SDValue(UpdN.getNode(), NumResultVecs));
8104 /// CombineVLDDUP - For a VDUPLANE node N, check if its source operand is a
8105 /// vldN-lane (N > 1) intrinsic, and if all the other uses of that intrinsic
8106 /// are also VDUPLANEs. If so, combine them to a vldN-dup operation and
8108 static bool CombineVLDDUP(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) {
8109 SelectionDAG &DAG = DCI.DAG;
8110 EVT VT = N->getValueType(0);
8111 // vldN-dup instructions only support 64-bit vectors for N > 1.
8112 if (!VT.is64BitVector())
8115 // Check if the VDUPLANE operand is a vldN-dup intrinsic.
8116 SDNode *VLD = N->getOperand(0).getNode();
8117 if (VLD->getOpcode() != ISD::INTRINSIC_W_CHAIN)
8119 unsigned NumVecs = 0;
8120 unsigned NewOpc = 0;
8121 unsigned IntNo = cast<ConstantSDNode>(VLD->getOperand(1))->getZExtValue();
8122 if (IntNo == Intrinsic::arm_neon_vld2lane) {
8124 NewOpc = ARMISD::VLD2DUP;
8125 } else if (IntNo == Intrinsic::arm_neon_vld3lane) {
8127 NewOpc = ARMISD::VLD3DUP;
8128 } else if (IntNo == Intrinsic::arm_neon_vld4lane) {
8130 NewOpc = ARMISD::VLD4DUP;
8135 // First check that all the vldN-lane uses are VDUPLANEs and that the lane
8136 // numbers match the load.
8137 unsigned VLDLaneNo =
8138 cast<ConstantSDNode>(VLD->getOperand(NumVecs+3))->getZExtValue();
8139 for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
8141 // Ignore uses of the chain result.
8142 if (UI.getUse().getResNo() == NumVecs)
8145 if (User->getOpcode() != ARMISD::VDUPLANE ||
8146 VLDLaneNo != cast<ConstantSDNode>(User->getOperand(1))->getZExtValue())
8150 // Create the vldN-dup node.
8153 for (n = 0; n < NumVecs; ++n)
8155 Tys[n] = MVT::Other;
8156 SDVTList SDTys = DAG.getVTList(Tys, NumVecs+1);
8157 SDValue Ops[] = { VLD->getOperand(0), VLD->getOperand(2) };
8158 MemIntrinsicSDNode *VLDMemInt = cast<MemIntrinsicSDNode>(VLD);
8159 SDValue VLDDup = DAG.getMemIntrinsicNode(NewOpc, VLD->getDebugLoc(), SDTys,
8160 Ops, 2, VLDMemInt->getMemoryVT(),
8161 VLDMemInt->getMemOperand());
8164 for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
8166 unsigned ResNo = UI.getUse().getResNo();
8167 // Ignore uses of the chain result.
8168 if (ResNo == NumVecs)
8171 DCI.CombineTo(User, SDValue(VLDDup.getNode(), ResNo));
8174 // Now the vldN-lane intrinsic is dead except for its chain result.
8175 // Update uses of the chain.
8176 std::vector<SDValue> VLDDupResults;
8177 for (unsigned n = 0; n < NumVecs; ++n)
8178 VLDDupResults.push_back(SDValue(VLDDup.getNode(), n));
8179 VLDDupResults.push_back(SDValue(VLDDup.getNode(), NumVecs));
8180 DCI.CombineTo(VLD, VLDDupResults);
8185 /// PerformVDUPLANECombine - Target-specific dag combine xforms for
8186 /// ARMISD::VDUPLANE.
8187 static SDValue PerformVDUPLANECombine(SDNode *N,
8188 TargetLowering::DAGCombinerInfo &DCI) {
8189 SDValue Op = N->getOperand(0);
8191 // If the source is a vldN-lane (N > 1) intrinsic, and all the other uses
8192 // of that intrinsic are also VDUPLANEs, combine them to a vldN-dup operation.
8193 if (CombineVLDDUP(N, DCI))
8194 return SDValue(N, 0);
8196 // If the source is already a VMOVIMM or VMVNIMM splat, the VDUPLANE is
8197 // redundant. Ignore bit_converts for now; element sizes are checked below.
8198 while (Op.getOpcode() == ISD::BITCAST)
8199 Op = Op.getOperand(0);
8200 if (Op.getOpcode() != ARMISD::VMOVIMM && Op.getOpcode() != ARMISD::VMVNIMM)
8203 // Make sure the VMOV element size is not bigger than the VDUPLANE elements.
8204 unsigned EltSize = Op.getValueType().getVectorElementType().getSizeInBits();
8205 // The canonical VMOV for a zero vector uses a 32-bit element size.
8206 unsigned Imm = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
8208 if (ARM_AM::decodeNEONModImm(Imm, EltBits) == 0)
8210 EVT VT = N->getValueType(0);
8211 if (EltSize > VT.getVectorElementType().getSizeInBits())
8214 return DCI.DAG.getNode(ISD::BITCAST, N->getDebugLoc(), VT, Op);
8217 // isConstVecPow2 - Return true if each vector element is a power of 2, all
8218 // elements are the same constant, C, and Log2(C) ranges from 1 to 32.
8219 static bool isConstVecPow2(SDValue ConstVec, bool isSigned, uint64_t &C)
8223 for (unsigned I = 0, E = ConstVec.getValueType().getVectorNumElements();
8225 ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(ConstVec.getOperand(I));
8230 APFloat APF = C->getValueAPF();
8231 if (APF.convertToInteger(&cN, 64, isSigned, APFloat::rmTowardZero, &isExact)
8232 != APFloat::opOK || !isExact)
8235 c0 = (I == 0) ? cN : c0;
8236 if (!isPowerOf2_64(cN) || c0 != cN || Log2_64(c0) < 1 || Log2_64(c0) > 32)
8243 /// PerformVCVTCombine - VCVT (floating-point to fixed-point, Advanced SIMD)
8244 /// can replace combinations of VMUL and VCVT (floating-point to integer)
8245 /// when the VMUL has a constant operand that is a power of 2.
8247 /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>):
8248 /// vmul.f32 d16, d17, d16
8249 /// vcvt.s32.f32 d16, d16
8251 /// vcvt.s32.f32 d16, d16, #3
8252 static SDValue PerformVCVTCombine(SDNode *N,
8253 TargetLowering::DAGCombinerInfo &DCI,
8254 const ARMSubtarget *Subtarget) {
8255 SelectionDAG &DAG = DCI.DAG;
8256 SDValue Op = N->getOperand(0);
8258 if (!Subtarget->hasNEON() || !Op.getValueType().isVector() ||
8259 Op.getOpcode() != ISD::FMUL)
8263 SDValue N0 = Op->getOperand(0);
8264 SDValue ConstVec = Op->getOperand(1);
8265 bool isSigned = N->getOpcode() == ISD::FP_TO_SINT;
8267 if (ConstVec.getOpcode() != ISD::BUILD_VECTOR ||
8268 !isConstVecPow2(ConstVec, isSigned, C))
8271 unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfp2fxs :
8272 Intrinsic::arm_neon_vcvtfp2fxu;
8273 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, N->getDebugLoc(),
8275 DAG.getConstant(IntrinsicOpcode, MVT::i32), N0,
8276 DAG.getConstant(Log2_64(C), MVT::i32));
8279 /// PerformVDIVCombine - VCVT (fixed-point to floating-point, Advanced SIMD)
8280 /// can replace combinations of VCVT (integer to floating-point) and VDIV
8281 /// when the VDIV has a constant operand that is a power of 2.
8283 /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>):
8284 /// vcvt.f32.s32 d16, d16
8285 /// vdiv.f32 d16, d17, d16
8287 /// vcvt.f32.s32 d16, d16, #3
8288 static SDValue PerformVDIVCombine(SDNode *N,
8289 TargetLowering::DAGCombinerInfo &DCI,
8290 const ARMSubtarget *Subtarget) {
8291 SelectionDAG &DAG = DCI.DAG;
8292 SDValue Op = N->getOperand(0);
8293 unsigned OpOpcode = Op.getNode()->getOpcode();
8295 if (!Subtarget->hasNEON() || !N->getValueType(0).isVector() ||
8296 (OpOpcode != ISD::SINT_TO_FP && OpOpcode != ISD::UINT_TO_FP))
8300 SDValue ConstVec = N->getOperand(1);
8301 bool isSigned = OpOpcode == ISD::SINT_TO_FP;
8303 if (ConstVec.getOpcode() != ISD::BUILD_VECTOR ||
8304 !isConstVecPow2(ConstVec, isSigned, C))
8307 unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfxs2fp :
8308 Intrinsic::arm_neon_vcvtfxu2fp;
8309 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, N->getDebugLoc(),
8311 DAG.getConstant(IntrinsicOpcode, MVT::i32),
8312 Op.getOperand(0), DAG.getConstant(Log2_64(C), MVT::i32));
8315 /// Getvshiftimm - Check if this is a valid build_vector for the immediate
8316 /// operand of a vector shift operation, where all the elements of the
8317 /// build_vector must have the same constant integer value.
8318 static bool getVShiftImm(SDValue Op, unsigned ElementBits, int64_t &Cnt) {
8319 // Ignore bit_converts.
8320 while (Op.getOpcode() == ISD::BITCAST)
8321 Op = Op.getOperand(0);
8322 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
8323 APInt SplatBits, SplatUndef;
8324 unsigned SplatBitSize;
8326 if (! BVN || ! BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize,
8327 HasAnyUndefs, ElementBits) ||
8328 SplatBitSize > ElementBits)
8330 Cnt = SplatBits.getSExtValue();
8334 /// isVShiftLImm - Check if this is a valid build_vector for the immediate
8335 /// operand of a vector shift left operation. That value must be in the range:
8336 /// 0 <= Value < ElementBits for a left shift; or
8337 /// 0 <= Value <= ElementBits for a long left shift.
8338 static bool isVShiftLImm(SDValue Op, EVT VT, bool isLong, int64_t &Cnt) {
8339 assert(VT.isVector() && "vector shift count is not a vector type");
8340 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
8341 if (! getVShiftImm(Op, ElementBits, Cnt))
8343 return (Cnt >= 0 && (isLong ? Cnt-1 : Cnt) < ElementBits);
8346 /// isVShiftRImm - Check if this is a valid build_vector for the immediate
8347 /// operand of a vector shift right operation. For a shift opcode, the value
8348 /// is positive, but for an intrinsic the value count must be negative. The
8349 /// absolute value must be in the range:
8350 /// 1 <= |Value| <= ElementBits for a right shift; or
8351 /// 1 <= |Value| <= ElementBits/2 for a narrow right shift.
8352 static bool isVShiftRImm(SDValue Op, EVT VT, bool isNarrow, bool isIntrinsic,
8354 assert(VT.isVector() && "vector shift count is not a vector type");
8355 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
8356 if (! getVShiftImm(Op, ElementBits, Cnt))
8360 return (Cnt >= 1 && Cnt <= (isNarrow ? ElementBits/2 : ElementBits));
8363 /// PerformIntrinsicCombine - ARM-specific DAG combining for intrinsics.
8364 static SDValue PerformIntrinsicCombine(SDNode *N, SelectionDAG &DAG) {
8365 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
8368 // Don't do anything for most intrinsics.
8371 // Vector shifts: check for immediate versions and lower them.
8372 // Note: This is done during DAG combining instead of DAG legalizing because
8373 // the build_vectors for 64-bit vector element shift counts are generally
8374 // not legal, and it is hard to see their values after they get legalized to
8375 // loads from a constant pool.
8376 case Intrinsic::arm_neon_vshifts:
8377 case Intrinsic::arm_neon_vshiftu:
8378 case Intrinsic::arm_neon_vshiftls:
8379 case Intrinsic::arm_neon_vshiftlu:
8380 case Intrinsic::arm_neon_vshiftn:
8381 case Intrinsic::arm_neon_vrshifts:
8382 case Intrinsic::arm_neon_vrshiftu:
8383 case Intrinsic::arm_neon_vrshiftn:
8384 case Intrinsic::arm_neon_vqshifts:
8385 case Intrinsic::arm_neon_vqshiftu:
8386 case Intrinsic::arm_neon_vqshiftsu:
8387 case Intrinsic::arm_neon_vqshiftns:
8388 case Intrinsic::arm_neon_vqshiftnu:
8389 case Intrinsic::arm_neon_vqshiftnsu:
8390 case Intrinsic::arm_neon_vqrshiftns:
8391 case Intrinsic::arm_neon_vqrshiftnu:
8392 case Intrinsic::arm_neon_vqrshiftnsu: {
8393 EVT VT = N->getOperand(1).getValueType();
8395 unsigned VShiftOpc = 0;
8398 case Intrinsic::arm_neon_vshifts:
8399 case Intrinsic::arm_neon_vshiftu:
8400 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt)) {
8401 VShiftOpc = ARMISD::VSHL;
8404 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt)) {
8405 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshifts ?
8406 ARMISD::VSHRs : ARMISD::VSHRu);
8411 case Intrinsic::arm_neon_vshiftls:
8412 case Intrinsic::arm_neon_vshiftlu:
8413 if (isVShiftLImm(N->getOperand(2), VT, true, Cnt))
8415 llvm_unreachable("invalid shift count for vshll intrinsic");
8417 case Intrinsic::arm_neon_vrshifts:
8418 case Intrinsic::arm_neon_vrshiftu:
8419 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt))
8423 case Intrinsic::arm_neon_vqshifts:
8424 case Intrinsic::arm_neon_vqshiftu:
8425 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
8429 case Intrinsic::arm_neon_vqshiftsu:
8430 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
8432 llvm_unreachable("invalid shift count for vqshlu intrinsic");
8434 case Intrinsic::arm_neon_vshiftn:
8435 case Intrinsic::arm_neon_vrshiftn:
8436 case Intrinsic::arm_neon_vqshiftns:
8437 case Intrinsic::arm_neon_vqshiftnu:
8438 case Intrinsic::arm_neon_vqshiftnsu:
8439 case Intrinsic::arm_neon_vqrshiftns:
8440 case Intrinsic::arm_neon_vqrshiftnu:
8441 case Intrinsic::arm_neon_vqrshiftnsu:
8442 // Narrowing shifts require an immediate right shift.
8443 if (isVShiftRImm(N->getOperand(2), VT, true, true, Cnt))
8445 llvm_unreachable("invalid shift count for narrowing vector shift "
8449 llvm_unreachable("unhandled vector shift");
8453 case Intrinsic::arm_neon_vshifts:
8454 case Intrinsic::arm_neon_vshiftu:
8455 // Opcode already set above.
8457 case Intrinsic::arm_neon_vshiftls:
8458 case Intrinsic::arm_neon_vshiftlu:
8459 if (Cnt == VT.getVectorElementType().getSizeInBits())
8460 VShiftOpc = ARMISD::VSHLLi;
8462 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshiftls ?
8463 ARMISD::VSHLLs : ARMISD::VSHLLu);
8465 case Intrinsic::arm_neon_vshiftn:
8466 VShiftOpc = ARMISD::VSHRN; break;
8467 case Intrinsic::arm_neon_vrshifts:
8468 VShiftOpc = ARMISD::VRSHRs; break;
8469 case Intrinsic::arm_neon_vrshiftu:
8470 VShiftOpc = ARMISD::VRSHRu; break;
8471 case Intrinsic::arm_neon_vrshiftn:
8472 VShiftOpc = ARMISD::VRSHRN; break;
8473 case Intrinsic::arm_neon_vqshifts:
8474 VShiftOpc = ARMISD::VQSHLs; break;
8475 case Intrinsic::arm_neon_vqshiftu:
8476 VShiftOpc = ARMISD::VQSHLu; break;
8477 case Intrinsic::arm_neon_vqshiftsu:
8478 VShiftOpc = ARMISD::VQSHLsu; break;
8479 case Intrinsic::arm_neon_vqshiftns:
8480 VShiftOpc = ARMISD::VQSHRNs; break;
8481 case Intrinsic::arm_neon_vqshiftnu:
8482 VShiftOpc = ARMISD::VQSHRNu; break;
8483 case Intrinsic::arm_neon_vqshiftnsu:
8484 VShiftOpc = ARMISD::VQSHRNsu; break;
8485 case Intrinsic::arm_neon_vqrshiftns:
8486 VShiftOpc = ARMISD::VQRSHRNs; break;
8487 case Intrinsic::arm_neon_vqrshiftnu:
8488 VShiftOpc = ARMISD::VQRSHRNu; break;
8489 case Intrinsic::arm_neon_vqrshiftnsu:
8490 VShiftOpc = ARMISD::VQRSHRNsu; break;
8493 return DAG.getNode(VShiftOpc, N->getDebugLoc(), N->getValueType(0),
8494 N->getOperand(1), DAG.getConstant(Cnt, MVT::i32));
8497 case Intrinsic::arm_neon_vshiftins: {
8498 EVT VT = N->getOperand(1).getValueType();
8500 unsigned VShiftOpc = 0;
8502 if (isVShiftLImm(N->getOperand(3), VT, false, Cnt))
8503 VShiftOpc = ARMISD::VSLI;
8504 else if (isVShiftRImm(N->getOperand(3), VT, false, true, Cnt))
8505 VShiftOpc = ARMISD::VSRI;
8507 llvm_unreachable("invalid shift count for vsli/vsri intrinsic");
8510 return DAG.getNode(VShiftOpc, N->getDebugLoc(), N->getValueType(0),
8511 N->getOperand(1), N->getOperand(2),
8512 DAG.getConstant(Cnt, MVT::i32));
8515 case Intrinsic::arm_neon_vqrshifts:
8516 case Intrinsic::arm_neon_vqrshiftu:
8517 // No immediate versions of these to check for.
8524 /// PerformShiftCombine - Checks for immediate versions of vector shifts and
8525 /// lowers them. As with the vector shift intrinsics, this is done during DAG
8526 /// combining instead of DAG legalizing because the build_vectors for 64-bit
8527 /// vector element shift counts are generally not legal, and it is hard to see
8528 /// their values after they get legalized to loads from a constant pool.
8529 static SDValue PerformShiftCombine(SDNode *N, SelectionDAG &DAG,
8530 const ARMSubtarget *ST) {
8531 EVT VT = N->getValueType(0);
8532 if (N->getOpcode() == ISD::SRL && VT == MVT::i32 && ST->hasV6Ops()) {
8533 // Canonicalize (srl (bswap x), 16) to (rotr (bswap x), 16) if the high
8534 // 16-bits of x is zero. This optimizes rev + lsr 16 to rev16.
8535 SDValue N1 = N->getOperand(1);
8536 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N1)) {
8537 SDValue N0 = N->getOperand(0);
8538 if (C->getZExtValue() == 16 && N0.getOpcode() == ISD::BSWAP &&
8539 DAG.MaskedValueIsZero(N0.getOperand(0),
8540 APInt::getHighBitsSet(32, 16)))
8541 return DAG.getNode(ISD::ROTR, N->getDebugLoc(), VT, N0, N1);
8545 // Nothing to be done for scalar shifts.
8546 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
8547 if (!VT.isVector() || !TLI.isTypeLegal(VT))
8550 assert(ST->hasNEON() && "unexpected vector shift");
8553 switch (N->getOpcode()) {
8554 default: llvm_unreachable("unexpected shift opcode");
8557 if (isVShiftLImm(N->getOperand(1), VT, false, Cnt))
8558 return DAG.getNode(ARMISD::VSHL, N->getDebugLoc(), VT, N->getOperand(0),
8559 DAG.getConstant(Cnt, MVT::i32));
8564 if (isVShiftRImm(N->getOperand(1), VT, false, false, Cnt)) {
8565 unsigned VShiftOpc = (N->getOpcode() == ISD::SRA ?
8566 ARMISD::VSHRs : ARMISD::VSHRu);
8567 return DAG.getNode(VShiftOpc, N->getDebugLoc(), VT, N->getOperand(0),
8568 DAG.getConstant(Cnt, MVT::i32));
8574 /// PerformExtendCombine - Target-specific DAG combining for ISD::SIGN_EXTEND,
8575 /// ISD::ZERO_EXTEND, and ISD::ANY_EXTEND.
8576 static SDValue PerformExtendCombine(SDNode *N, SelectionDAG &DAG,
8577 const ARMSubtarget *ST) {
8578 SDValue N0 = N->getOperand(0);
8580 // Check for sign- and zero-extensions of vector extract operations of 8-
8581 // and 16-bit vector elements. NEON supports these directly. They are
8582 // handled during DAG combining because type legalization will promote them
8583 // to 32-bit types and it is messy to recognize the operations after that.
8584 if (ST->hasNEON() && N0.getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
8585 SDValue Vec = N0.getOperand(0);
8586 SDValue Lane = N0.getOperand(1);
8587 EVT VT = N->getValueType(0);
8588 EVT EltVT = N0.getValueType();
8589 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
8591 if (VT == MVT::i32 &&
8592 (EltVT == MVT::i8 || EltVT == MVT::i16) &&
8593 TLI.isTypeLegal(Vec.getValueType()) &&
8594 isa<ConstantSDNode>(Lane)) {
8597 switch (N->getOpcode()) {
8598 default: llvm_unreachable("unexpected opcode");
8599 case ISD::SIGN_EXTEND:
8600 Opc = ARMISD::VGETLANEs;
8602 case ISD::ZERO_EXTEND:
8603 case ISD::ANY_EXTEND:
8604 Opc = ARMISD::VGETLANEu;
8607 return DAG.getNode(Opc, N->getDebugLoc(), VT, Vec, Lane);
8614 /// PerformSELECT_CCCombine - Target-specific DAG combining for ISD::SELECT_CC
8615 /// to match f32 max/min patterns to use NEON vmax/vmin instructions.
8616 static SDValue PerformSELECT_CCCombine(SDNode *N, SelectionDAG &DAG,
8617 const ARMSubtarget *ST) {
8618 // If the target supports NEON, try to use vmax/vmin instructions for f32
8619 // selects like "x < y ? x : y". Unless the NoNaNsFPMath option is set,
8620 // be careful about NaNs: NEON's vmax/vmin return NaN if either operand is
8621 // a NaN; only do the transformation when it matches that behavior.
8623 // For now only do this when using NEON for FP operations; if using VFP, it
8624 // is not obvious that the benefit outweighs the cost of switching to the
8626 if (!ST->hasNEON() || !ST->useNEONForSinglePrecisionFP() ||
8627 N->getValueType(0) != MVT::f32)
8630 SDValue CondLHS = N->getOperand(0);
8631 SDValue CondRHS = N->getOperand(1);
8632 SDValue LHS = N->getOperand(2);
8633 SDValue RHS = N->getOperand(3);
8634 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(4))->get();
8636 unsigned Opcode = 0;
8638 if (DAG.isEqualTo(LHS, CondLHS) && DAG.isEqualTo(RHS, CondRHS)) {
8639 IsReversed = false; // x CC y ? x : y
8640 } else if (DAG.isEqualTo(LHS, CondRHS) && DAG.isEqualTo(RHS, CondLHS)) {
8641 IsReversed = true ; // x CC y ? y : x
8655 // If LHS is NaN, an ordered comparison will be false and the result will
8656 // be the RHS, but vmin(NaN, RHS) = NaN. Avoid this by checking that LHS
8657 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
8658 IsUnordered = (CC == ISD::SETULT || CC == ISD::SETULE);
8659 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
8661 // For less-than-or-equal comparisons, "+0 <= -0" will be true but vmin
8662 // will return -0, so vmin can only be used for unsafe math or if one of
8663 // the operands is known to be nonzero.
8664 if ((CC == ISD::SETLE || CC == ISD::SETOLE || CC == ISD::SETULE) &&
8665 !DAG.getTarget().Options.UnsafeFPMath &&
8666 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
8668 Opcode = IsReversed ? ARMISD::FMAX : ARMISD::FMIN;
8677 // If LHS is NaN, an ordered comparison will be false and the result will
8678 // be the RHS, but vmax(NaN, RHS) = NaN. Avoid this by checking that LHS
8679 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
8680 IsUnordered = (CC == ISD::SETUGT || CC == ISD::SETUGE);
8681 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
8683 // For greater-than-or-equal comparisons, "-0 >= +0" will be true but vmax
8684 // will return +0, so vmax can only be used for unsafe math or if one of
8685 // the operands is known to be nonzero.
8686 if ((CC == ISD::SETGE || CC == ISD::SETOGE || CC == ISD::SETUGE) &&
8687 !DAG.getTarget().Options.UnsafeFPMath &&
8688 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
8690 Opcode = IsReversed ? ARMISD::FMIN : ARMISD::FMAX;
8696 return DAG.getNode(Opcode, N->getDebugLoc(), N->getValueType(0), LHS, RHS);
8699 /// PerformCMOVCombine - Target-specific DAG combining for ARMISD::CMOV.
8701 ARMTargetLowering::PerformCMOVCombine(SDNode *N, SelectionDAG &DAG) const {
8702 SDValue Cmp = N->getOperand(4);
8703 if (Cmp.getOpcode() != ARMISD::CMPZ)
8704 // Only looking at EQ and NE cases.
8707 EVT VT = N->getValueType(0);
8708 DebugLoc dl = N->getDebugLoc();
8709 SDValue LHS = Cmp.getOperand(0);
8710 SDValue RHS = Cmp.getOperand(1);
8711 SDValue FalseVal = N->getOperand(0);
8712 SDValue TrueVal = N->getOperand(1);
8713 SDValue ARMcc = N->getOperand(2);
8714 ARMCC::CondCodes CC =
8715 (ARMCC::CondCodes)cast<ConstantSDNode>(ARMcc)->getZExtValue();
8733 /// FIXME: Turn this into a target neutral optimization?
8735 if (CC == ARMCC::NE && FalseVal == RHS && FalseVal != LHS) {
8736 Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, TrueVal, ARMcc,
8737 N->getOperand(3), Cmp);
8738 } else if (CC == ARMCC::EQ && TrueVal == RHS) {
8740 SDValue NewCmp = getARMCmp(LHS, RHS, ISD::SETNE, ARMcc, DAG, dl);
8741 Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, FalseVal, ARMcc,
8742 N->getOperand(3), NewCmp);
8745 if (Res.getNode()) {
8746 APInt KnownZero, KnownOne;
8747 DAG.ComputeMaskedBits(SDValue(N,0), KnownZero, KnownOne);
8748 // Capture demanded bits information that would be otherwise lost.
8749 if (KnownZero == 0xfffffffe)
8750 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
8751 DAG.getValueType(MVT::i1));
8752 else if (KnownZero == 0xffffff00)
8753 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
8754 DAG.getValueType(MVT::i8));
8755 else if (KnownZero == 0xffff0000)
8756 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
8757 DAG.getValueType(MVT::i16));
8763 SDValue ARMTargetLowering::PerformDAGCombine(SDNode *N,
8764 DAGCombinerInfo &DCI) const {
8765 switch (N->getOpcode()) {
8767 case ISD::ADD: return PerformADDCombine(N, DCI, Subtarget);
8768 case ISD::SUB: return PerformSUBCombine(N, DCI);
8769 case ISD::MUL: return PerformMULCombine(N, DCI, Subtarget);
8770 case ISD::OR: return PerformORCombine(N, DCI, Subtarget);
8771 case ISD::XOR: return PerformXORCombine(N, DCI, Subtarget);
8772 case ISD::AND: return PerformANDCombine(N, DCI, Subtarget);
8773 case ARMISD::BFI: return PerformBFICombine(N, DCI);
8774 case ARMISD::VMOVRRD: return PerformVMOVRRDCombine(N, DCI);
8775 case ARMISD::VMOVDRR: return PerformVMOVDRRCombine(N, DCI.DAG);
8776 case ISD::STORE: return PerformSTORECombine(N, DCI);
8777 case ISD::BUILD_VECTOR: return PerformBUILD_VECTORCombine(N, DCI);
8778 case ISD::INSERT_VECTOR_ELT: return PerformInsertEltCombine(N, DCI);
8779 case ISD::VECTOR_SHUFFLE: return PerformVECTOR_SHUFFLECombine(N, DCI.DAG);
8780 case ARMISD::VDUPLANE: return PerformVDUPLANECombine(N, DCI);
8781 case ISD::FP_TO_SINT:
8782 case ISD::FP_TO_UINT: return PerformVCVTCombine(N, DCI, Subtarget);
8783 case ISD::FDIV: return PerformVDIVCombine(N, DCI, Subtarget);
8784 case ISD::INTRINSIC_WO_CHAIN: return PerformIntrinsicCombine(N, DCI.DAG);
8787 case ISD::SRL: return PerformShiftCombine(N, DCI.DAG, Subtarget);
8788 case ISD::SIGN_EXTEND:
8789 case ISD::ZERO_EXTEND:
8790 case ISD::ANY_EXTEND: return PerformExtendCombine(N, DCI.DAG, Subtarget);
8791 case ISD::SELECT_CC: return PerformSELECT_CCCombine(N, DCI.DAG, Subtarget);
8792 case ARMISD::CMOV: return PerformCMOVCombine(N, DCI.DAG);
8793 case ARMISD::VLD2DUP:
8794 case ARMISD::VLD3DUP:
8795 case ARMISD::VLD4DUP:
8796 return CombineBaseUpdate(N, DCI);
8797 case ISD::INTRINSIC_VOID:
8798 case ISD::INTRINSIC_W_CHAIN:
8799 switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
8800 case Intrinsic::arm_neon_vld1:
8801 case Intrinsic::arm_neon_vld2:
8802 case Intrinsic::arm_neon_vld3:
8803 case Intrinsic::arm_neon_vld4:
8804 case Intrinsic::arm_neon_vld2lane:
8805 case Intrinsic::arm_neon_vld3lane:
8806 case Intrinsic::arm_neon_vld4lane:
8807 case Intrinsic::arm_neon_vst1:
8808 case Intrinsic::arm_neon_vst2:
8809 case Intrinsic::arm_neon_vst3:
8810 case Intrinsic::arm_neon_vst4:
8811 case Intrinsic::arm_neon_vst2lane:
8812 case Intrinsic::arm_neon_vst3lane:
8813 case Intrinsic::arm_neon_vst4lane:
8814 return CombineBaseUpdate(N, DCI);
8822 bool ARMTargetLowering::isDesirableToTransformToIntegerOp(unsigned Opc,
8824 return (VT == MVT::f32) && (Opc == ISD::LOAD || Opc == ISD::STORE);
8827 bool ARMTargetLowering::allowsUnalignedMemoryAccesses(EVT VT) const {
8828 if (!Subtarget->allowsUnalignedMem())
8831 switch (VT.getSimpleVT().SimpleTy) {
8839 return Subtarget->hasNEON();
8840 // FIXME: VLD1 etc with standard alignment is legal.
8844 static bool memOpAlign(unsigned DstAlign, unsigned SrcAlign,
8845 unsigned AlignCheck) {
8846 return ((SrcAlign == 0 || SrcAlign % AlignCheck == 0) &&
8847 (DstAlign == 0 || DstAlign % AlignCheck == 0));
8850 EVT ARMTargetLowering::getOptimalMemOpType(uint64_t Size,
8851 unsigned DstAlign, unsigned SrcAlign,
8854 MachineFunction &MF) const {
8855 const Function *F = MF.getFunction();
8857 // See if we can use NEON instructions for this...
8859 !F->hasFnAttr(Attribute::NoImplicitFloat) &&
8860 Subtarget->hasNEON()) {
8861 if (memOpAlign(SrcAlign, DstAlign, 16) && Size >= 16) {
8863 } else if (memOpAlign(SrcAlign, DstAlign, 8) && Size >= 8) {
8868 // Lowering to i32/i16 if the size permits.
8871 } else if (Size >= 2) {
8875 // Let the target-independent logic figure it out.
8879 static bool isLegalT1AddressImmediate(int64_t V, EVT VT) {
8884 switch (VT.getSimpleVT().SimpleTy) {
8885 default: return false;
8900 if ((V & (Scale - 1)) != 0)
8903 return V == (V & ((1LL << 5) - 1));
8906 static bool isLegalT2AddressImmediate(int64_t V, EVT VT,
8907 const ARMSubtarget *Subtarget) {
8914 switch (VT.getSimpleVT().SimpleTy) {
8915 default: return false;
8920 // + imm12 or - imm8
8922 return V == (V & ((1LL << 8) - 1));
8923 return V == (V & ((1LL << 12) - 1));
8926 // Same as ARM mode. FIXME: NEON?
8927 if (!Subtarget->hasVFP2())
8932 return V == (V & ((1LL << 8) - 1));
8936 /// isLegalAddressImmediate - Return true if the integer value can be used
8937 /// as the offset of the target addressing mode for load / store of the
8939 static bool isLegalAddressImmediate(int64_t V, EVT VT,
8940 const ARMSubtarget *Subtarget) {
8947 if (Subtarget->isThumb1Only())
8948 return isLegalT1AddressImmediate(V, VT);
8949 else if (Subtarget->isThumb2())
8950 return isLegalT2AddressImmediate(V, VT, Subtarget);
8955 switch (VT.getSimpleVT().SimpleTy) {
8956 default: return false;
8961 return V == (V & ((1LL << 12) - 1));
8964 return V == (V & ((1LL << 8) - 1));
8967 if (!Subtarget->hasVFP2()) // FIXME: NEON?
8972 return V == (V & ((1LL << 8) - 1));
8976 bool ARMTargetLowering::isLegalT2ScaledAddressingMode(const AddrMode &AM,
8978 int Scale = AM.Scale;
8982 switch (VT.getSimpleVT().SimpleTy) {
8983 default: return false;
8992 return Scale == 2 || Scale == 4 || Scale == 8;
8995 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
8999 // Note, we allow "void" uses (basically, uses that aren't loads or
9000 // stores), because arm allows folding a scale into many arithmetic
9001 // operations. This should be made more precise and revisited later.
9003 // Allow r << imm, but the imm has to be a multiple of two.
9004 if (Scale & 1) return false;
9005 return isPowerOf2_32(Scale);
9009 /// isLegalAddressingMode - Return true if the addressing mode represented
9010 /// by AM is legal for this target, for a load/store of the specified type.
9011 bool ARMTargetLowering::isLegalAddressingMode(const AddrMode &AM,
9013 EVT VT = getValueType(Ty, true);
9014 if (!isLegalAddressImmediate(AM.BaseOffs, VT, Subtarget))
9017 // Can never fold addr of global into load/store.
9022 case 0: // no scale reg, must be "r+i" or "r", or "i".
9025 if (Subtarget->isThumb1Only())
9029 // ARM doesn't support any R+R*scale+imm addr modes.
9036 if (Subtarget->isThumb2())
9037 return isLegalT2ScaledAddressingMode(AM, VT);
9039 int Scale = AM.Scale;
9040 switch (VT.getSimpleVT().SimpleTy) {
9041 default: return false;
9045 if (Scale < 0) Scale = -Scale;
9049 return isPowerOf2_32(Scale & ~1);
9053 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
9058 // Note, we allow "void" uses (basically, uses that aren't loads or
9059 // stores), because arm allows folding a scale into many arithmetic
9060 // operations. This should be made more precise and revisited later.
9062 // Allow r << imm, but the imm has to be a multiple of two.
9063 if (Scale & 1) return false;
9064 return isPowerOf2_32(Scale);
9070 /// isLegalICmpImmediate - Return true if the specified immediate is legal
9071 /// icmp immediate, that is the target has icmp instructions which can compare
9072 /// a register against the immediate without having to materialize the
9073 /// immediate into a register.
9074 bool ARMTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
9075 // Thumb2 and ARM modes can use cmn for negative immediates.
9076 if (!Subtarget->isThumb())
9077 return ARM_AM::getSOImmVal(llvm::abs64(Imm)) != -1;
9078 if (Subtarget->isThumb2())
9079 return ARM_AM::getT2SOImmVal(llvm::abs64(Imm)) != -1;
9080 // Thumb1 doesn't have cmn, and only 8-bit immediates.
9081 return Imm >= 0 && Imm <= 255;
9084 /// isLegalAddImmediate - Return true if the specified immediate is a legal add
9085 /// *or sub* immediate, that is the target has add or sub instructions which can
9086 /// add a register with the immediate without having to materialize the
9087 /// immediate into a register.
9088 bool ARMTargetLowering::isLegalAddImmediate(int64_t Imm) const {
9089 // Same encoding for add/sub, just flip the sign.
9090 int64_t AbsImm = llvm::abs64(Imm);
9091 if (!Subtarget->isThumb())
9092 return ARM_AM::getSOImmVal(AbsImm) != -1;
9093 if (Subtarget->isThumb2())
9094 return ARM_AM::getT2SOImmVal(AbsImm) != -1;
9095 // Thumb1 only has 8-bit unsigned immediate.
9096 return AbsImm >= 0 && AbsImm <= 255;
9099 static bool getARMIndexedAddressParts(SDNode *Ptr, EVT VT,
9100 bool isSEXTLoad, SDValue &Base,
9101 SDValue &Offset, bool &isInc,
9102 SelectionDAG &DAG) {
9103 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
9106 if (VT == MVT::i16 || ((VT == MVT::i8 || VT == MVT::i1) && isSEXTLoad)) {
9108 Base = Ptr->getOperand(0);
9109 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
9110 int RHSC = (int)RHS->getZExtValue();
9111 if (RHSC < 0 && RHSC > -256) {
9112 assert(Ptr->getOpcode() == ISD::ADD);
9114 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
9118 isInc = (Ptr->getOpcode() == ISD::ADD);
9119 Offset = Ptr->getOperand(1);
9121 } else if (VT == MVT::i32 || VT == MVT::i8 || VT == MVT::i1) {
9123 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
9124 int RHSC = (int)RHS->getZExtValue();
9125 if (RHSC < 0 && RHSC > -0x1000) {
9126 assert(Ptr->getOpcode() == ISD::ADD);
9128 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
9129 Base = Ptr->getOperand(0);
9134 if (Ptr->getOpcode() == ISD::ADD) {
9136 ARM_AM::ShiftOpc ShOpcVal=
9137 ARM_AM::getShiftOpcForNode(Ptr->getOperand(0).getOpcode());
9138 if (ShOpcVal != ARM_AM::no_shift) {
9139 Base = Ptr->getOperand(1);
9140 Offset = Ptr->getOperand(0);
9142 Base = Ptr->getOperand(0);
9143 Offset = Ptr->getOperand(1);
9148 isInc = (Ptr->getOpcode() == ISD::ADD);
9149 Base = Ptr->getOperand(0);
9150 Offset = Ptr->getOperand(1);
9154 // FIXME: Use VLDM / VSTM to emulate indexed FP load / store.
9158 static bool getT2IndexedAddressParts(SDNode *Ptr, EVT VT,
9159 bool isSEXTLoad, SDValue &Base,
9160 SDValue &Offset, bool &isInc,
9161 SelectionDAG &DAG) {
9162 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
9165 Base = Ptr->getOperand(0);
9166 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
9167 int RHSC = (int)RHS->getZExtValue();
9168 if (RHSC < 0 && RHSC > -0x100) { // 8 bits.
9169 assert(Ptr->getOpcode() == ISD::ADD);
9171 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
9173 } else if (RHSC > 0 && RHSC < 0x100) { // 8 bit, no zero.
9174 isInc = Ptr->getOpcode() == ISD::ADD;
9175 Offset = DAG.getConstant(RHSC, RHS->getValueType(0));
9183 /// getPreIndexedAddressParts - returns true by value, base pointer and
9184 /// offset pointer and addressing mode by reference if the node's address
9185 /// can be legally represented as pre-indexed load / store address.
9187 ARMTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base,
9189 ISD::MemIndexedMode &AM,
9190 SelectionDAG &DAG) const {
9191 if (Subtarget->isThumb1Only())
9196 bool isSEXTLoad = false;
9197 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
9198 Ptr = LD->getBasePtr();
9199 VT = LD->getMemoryVT();
9200 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
9201 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
9202 Ptr = ST->getBasePtr();
9203 VT = ST->getMemoryVT();
9208 bool isLegal = false;
9209 if (Subtarget->isThumb2())
9210 isLegal = getT2IndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
9211 Offset, isInc, DAG);
9213 isLegal = getARMIndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
9214 Offset, isInc, DAG);
9218 AM = isInc ? ISD::PRE_INC : ISD::PRE_DEC;
9222 /// getPostIndexedAddressParts - returns true by value, base pointer and
9223 /// offset pointer and addressing mode by reference if this node can be
9224 /// combined with a load / store to form a post-indexed load / store.
9225 bool ARMTargetLowering::getPostIndexedAddressParts(SDNode *N, SDNode *Op,
9228 ISD::MemIndexedMode &AM,
9229 SelectionDAG &DAG) const {
9230 if (Subtarget->isThumb1Only())
9235 bool isSEXTLoad = false;
9236 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
9237 VT = LD->getMemoryVT();
9238 Ptr = LD->getBasePtr();
9239 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
9240 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
9241 VT = ST->getMemoryVT();
9242 Ptr = ST->getBasePtr();
9247 bool isLegal = false;
9248 if (Subtarget->isThumb2())
9249 isLegal = getT2IndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
9252 isLegal = getARMIndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
9258 // Swap base ptr and offset to catch more post-index load / store when
9259 // it's legal. In Thumb2 mode, offset must be an immediate.
9260 if (Ptr == Offset && Op->getOpcode() == ISD::ADD &&
9261 !Subtarget->isThumb2())
9262 std::swap(Base, Offset);
9264 // Post-indexed load / store update the base pointer.
9269 AM = isInc ? ISD::POST_INC : ISD::POST_DEC;
9273 void ARMTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
9276 const SelectionDAG &DAG,
9277 unsigned Depth) const {
9278 KnownZero = KnownOne = APInt(KnownOne.getBitWidth(), 0);
9279 switch (Op.getOpcode()) {
9281 case ARMISD::CMOV: {
9282 // Bits are known zero/one if known on the LHS and RHS.
9283 DAG.ComputeMaskedBits(Op.getOperand(0), KnownZero, KnownOne, Depth+1);
9284 if (KnownZero == 0 && KnownOne == 0) return;
9286 APInt KnownZeroRHS, KnownOneRHS;
9287 DAG.ComputeMaskedBits(Op.getOperand(1), KnownZeroRHS, KnownOneRHS, Depth+1);
9288 KnownZero &= KnownZeroRHS;
9289 KnownOne &= KnownOneRHS;
9295 //===----------------------------------------------------------------------===//
9296 // ARM Inline Assembly Support
9297 //===----------------------------------------------------------------------===//
9299 bool ARMTargetLowering::ExpandInlineAsm(CallInst *CI) const {
9300 // Looking for "rev" which is V6+.
9301 if (!Subtarget->hasV6Ops())
9304 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
9305 std::string AsmStr = IA->getAsmString();
9306 SmallVector<StringRef, 4> AsmPieces;
9307 SplitString(AsmStr, AsmPieces, ";\n");
9309 switch (AsmPieces.size()) {
9310 default: return false;
9312 AsmStr = AsmPieces[0];
9314 SplitString(AsmStr, AsmPieces, " \t,");
9317 if (AsmPieces.size() == 3 &&
9318 AsmPieces[0] == "rev" && AsmPieces[1] == "$0" && AsmPieces[2] == "$1" &&
9319 IA->getConstraintString().compare(0, 4, "=l,l") == 0) {
9320 IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
9321 if (Ty && Ty->getBitWidth() == 32)
9322 return IntrinsicLowering::LowerToByteSwap(CI);
9330 /// getConstraintType - Given a constraint letter, return the type of
9331 /// constraint it is for this target.
9332 ARMTargetLowering::ConstraintType
9333 ARMTargetLowering::getConstraintType(const std::string &Constraint) const {
9334 if (Constraint.size() == 1) {
9335 switch (Constraint[0]) {
9337 case 'l': return C_RegisterClass;
9338 case 'w': return C_RegisterClass;
9339 case 'h': return C_RegisterClass;
9340 case 'x': return C_RegisterClass;
9341 case 't': return C_RegisterClass;
9342 case 'j': return C_Other; // Constant for movw.
9343 // An address with a single base register. Due to the way we
9344 // currently handle addresses it is the same as an 'r' memory constraint.
9345 case 'Q': return C_Memory;
9347 } else if (Constraint.size() == 2) {
9348 switch (Constraint[0]) {
9350 // All 'U+' constraints are addresses.
9351 case 'U': return C_Memory;
9354 return TargetLowering::getConstraintType(Constraint);
9357 /// Examine constraint type and operand type and determine a weight value.
9358 /// This object must already have been set up with the operand type
9359 /// and the current alternative constraint selected.
9360 TargetLowering::ConstraintWeight
9361 ARMTargetLowering::getSingleConstraintMatchWeight(
9362 AsmOperandInfo &info, const char *constraint) const {
9363 ConstraintWeight weight = CW_Invalid;
9364 Value *CallOperandVal = info.CallOperandVal;
9365 // If we don't have a value, we can't do a match,
9366 // but allow it at the lowest weight.
9367 if (CallOperandVal == NULL)
9369 Type *type = CallOperandVal->getType();
9370 // Look at the constraint type.
9371 switch (*constraint) {
9373 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
9376 if (type->isIntegerTy()) {
9377 if (Subtarget->isThumb())
9378 weight = CW_SpecificReg;
9380 weight = CW_Register;
9384 if (type->isFloatingPointTy())
9385 weight = CW_Register;
9391 typedef std::pair<unsigned, const TargetRegisterClass*> RCPair;
9393 ARMTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
9395 if (Constraint.size() == 1) {
9396 // GCC ARM Constraint Letters
9397 switch (Constraint[0]) {
9398 case 'l': // Low regs or general regs.
9399 if (Subtarget->isThumb())
9400 return RCPair(0U, &ARM::tGPRRegClass);
9401 return RCPair(0U, &ARM::GPRRegClass);
9402 case 'h': // High regs or no regs.
9403 if (Subtarget->isThumb())
9404 return RCPair(0U, &ARM::hGPRRegClass);
9407 return RCPair(0U, &ARM::GPRRegClass);
9410 return RCPair(0U, &ARM::SPRRegClass);
9411 if (VT.getSizeInBits() == 64)
9412 return RCPair(0U, &ARM::DPRRegClass);
9413 if (VT.getSizeInBits() == 128)
9414 return RCPair(0U, &ARM::QPRRegClass);
9418 return RCPair(0U, &ARM::SPR_8RegClass);
9419 if (VT.getSizeInBits() == 64)
9420 return RCPair(0U, &ARM::DPR_8RegClass);
9421 if (VT.getSizeInBits() == 128)
9422 return RCPair(0U, &ARM::QPR_8RegClass);
9426 return RCPair(0U, &ARM::SPRRegClass);
9430 if (StringRef("{cc}").equals_lower(Constraint))
9431 return std::make_pair(unsigned(ARM::CPSR), &ARM::CCRRegClass);
9433 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
9436 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
9437 /// vector. If it is invalid, don't add anything to Ops.
9438 void ARMTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
9439 std::string &Constraint,
9440 std::vector<SDValue>&Ops,
9441 SelectionDAG &DAG) const {
9442 SDValue Result(0, 0);
9444 // Currently only support length 1 constraints.
9445 if (Constraint.length() != 1) return;
9447 char ConstraintLetter = Constraint[0];
9448 switch (ConstraintLetter) {
9451 case 'I': case 'J': case 'K': case 'L':
9452 case 'M': case 'N': case 'O':
9453 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
9457 int64_t CVal64 = C->getSExtValue();
9458 int CVal = (int) CVal64;
9459 // None of these constraints allow values larger than 32 bits. Check
9460 // that the value fits in an int.
9464 switch (ConstraintLetter) {
9466 // Constant suitable for movw, must be between 0 and
9468 if (Subtarget->hasV6T2Ops())
9469 if (CVal >= 0 && CVal <= 65535)
9473 if (Subtarget->isThumb1Only()) {
9474 // This must be a constant between 0 and 255, for ADD
9476 if (CVal >= 0 && CVal <= 255)
9478 } else if (Subtarget->isThumb2()) {
9479 // A constant that can be used as an immediate value in a
9480 // data-processing instruction.
9481 if (ARM_AM::getT2SOImmVal(CVal) != -1)
9484 // A constant that can be used as an immediate value in a
9485 // data-processing instruction.
9486 if (ARM_AM::getSOImmVal(CVal) != -1)
9492 if (Subtarget->isThumb()) { // FIXME thumb2
9493 // This must be a constant between -255 and -1, for negated ADD
9494 // immediates. This can be used in GCC with an "n" modifier that
9495 // prints the negated value, for use with SUB instructions. It is
9496 // not useful otherwise but is implemented for compatibility.
9497 if (CVal >= -255 && CVal <= -1)
9500 // This must be a constant between -4095 and 4095. It is not clear
9501 // what this constraint is intended for. Implemented for
9502 // compatibility with GCC.
9503 if (CVal >= -4095 && CVal <= 4095)
9509 if (Subtarget->isThumb1Only()) {
9510 // A 32-bit value where only one byte has a nonzero value. Exclude
9511 // zero to match GCC. This constraint is used by GCC internally for
9512 // constants that can be loaded with a move/shift combination.
9513 // It is not useful otherwise but is implemented for compatibility.
9514 if (CVal != 0 && ARM_AM::isThumbImmShiftedVal(CVal))
9516 } else if (Subtarget->isThumb2()) {
9517 // A constant whose bitwise inverse can be used as an immediate
9518 // value in a data-processing instruction. This can be used in GCC
9519 // with a "B" modifier that prints the inverted value, for use with
9520 // BIC and MVN instructions. It is not useful otherwise but is
9521 // implemented for compatibility.
9522 if (ARM_AM::getT2SOImmVal(~CVal) != -1)
9525 // A constant whose bitwise inverse can be used as an immediate
9526 // value in a data-processing instruction. This can be used in GCC
9527 // with a "B" modifier that prints the inverted value, for use with
9528 // BIC and MVN instructions. It is not useful otherwise but is
9529 // implemented for compatibility.
9530 if (ARM_AM::getSOImmVal(~CVal) != -1)
9536 if (Subtarget->isThumb1Only()) {
9537 // This must be a constant between -7 and 7,
9538 // for 3-operand ADD/SUB immediate instructions.
9539 if (CVal >= -7 && CVal < 7)
9541 } else if (Subtarget->isThumb2()) {
9542 // A constant whose negation can be used as an immediate value in a
9543 // data-processing instruction. This can be used in GCC with an "n"
9544 // modifier that prints the negated value, for use with SUB
9545 // instructions. It is not useful otherwise but is implemented for
9547 if (ARM_AM::getT2SOImmVal(-CVal) != -1)
9550 // A constant whose negation can be used as an immediate value in a
9551 // data-processing instruction. This can be used in GCC with an "n"
9552 // modifier that prints the negated value, for use with SUB
9553 // instructions. It is not useful otherwise but is implemented for
9555 if (ARM_AM::getSOImmVal(-CVal) != -1)
9561 if (Subtarget->isThumb()) { // FIXME thumb2
9562 // This must be a multiple of 4 between 0 and 1020, for
9563 // ADD sp + immediate.
9564 if ((CVal >= 0 && CVal <= 1020) && ((CVal & 3) == 0))
9567 // A power of two or a constant between 0 and 32. This is used in
9568 // GCC for the shift amount on shifted register operands, but it is
9569 // useful in general for any shift amounts.
9570 if ((CVal >= 0 && CVal <= 32) || ((CVal & (CVal - 1)) == 0))
9576 if (Subtarget->isThumb()) { // FIXME thumb2
9577 // This must be a constant between 0 and 31, for shift amounts.
9578 if (CVal >= 0 && CVal <= 31)
9584 if (Subtarget->isThumb()) { // FIXME thumb2
9585 // This must be a multiple of 4 between -508 and 508, for
9586 // ADD/SUB sp = sp + immediate.
9587 if ((CVal >= -508 && CVal <= 508) && ((CVal & 3) == 0))
9592 Result = DAG.getTargetConstant(CVal, Op.getValueType());
9596 if (Result.getNode()) {
9597 Ops.push_back(Result);
9600 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
9604 ARMTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
9605 // The ARM target isn't yet aware of offsets.
9609 bool ARM::isBitFieldInvertedMask(unsigned v) {
9610 if (v == 0xffffffff)
9612 // there can be 1's on either or both "outsides", all the "inside"
9614 unsigned int lsb = 0, msb = 31;
9615 while (v & (1 << msb)) --msb;
9616 while (v & (1 << lsb)) ++lsb;
9617 for (unsigned int i = lsb; i <= msb; ++i) {
9624 /// isFPImmLegal - Returns true if the target can instruction select the
9625 /// specified FP immediate natively. If false, the legalizer will
9626 /// materialize the FP immediate as a load from a constant pool.
9627 bool ARMTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
9628 if (!Subtarget->hasVFP3())
9631 return ARM_AM::getFP32Imm(Imm) != -1;
9633 return ARM_AM::getFP64Imm(Imm) != -1;
9637 /// getTgtMemIntrinsic - Represent NEON load and store intrinsics as
9638 /// MemIntrinsicNodes. The associated MachineMemOperands record the alignment
9639 /// specified in the intrinsic calls.
9640 bool ARMTargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info,
9642 unsigned Intrinsic) const {
9643 switch (Intrinsic) {
9644 case Intrinsic::arm_neon_vld1:
9645 case Intrinsic::arm_neon_vld2:
9646 case Intrinsic::arm_neon_vld3:
9647 case Intrinsic::arm_neon_vld4:
9648 case Intrinsic::arm_neon_vld2lane:
9649 case Intrinsic::arm_neon_vld3lane:
9650 case Intrinsic::arm_neon_vld4lane: {
9651 Info.opc = ISD::INTRINSIC_W_CHAIN;
9652 // Conservatively set memVT to the entire set of vectors loaded.
9653 uint64_t NumElts = getTargetData()->getTypeAllocSize(I.getType()) / 8;
9654 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
9655 Info.ptrVal = I.getArgOperand(0);
9657 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
9658 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
9659 Info.vol = false; // volatile loads with NEON intrinsics not supported
9660 Info.readMem = true;
9661 Info.writeMem = false;
9664 case Intrinsic::arm_neon_vst1:
9665 case Intrinsic::arm_neon_vst2:
9666 case Intrinsic::arm_neon_vst3:
9667 case Intrinsic::arm_neon_vst4:
9668 case Intrinsic::arm_neon_vst2lane:
9669 case Intrinsic::arm_neon_vst3lane:
9670 case Intrinsic::arm_neon_vst4lane: {
9671 Info.opc = ISD::INTRINSIC_VOID;
9672 // Conservatively set memVT to the entire set of vectors stored.
9673 unsigned NumElts = 0;
9674 for (unsigned ArgI = 1, ArgE = I.getNumArgOperands(); ArgI < ArgE; ++ArgI) {
9675 Type *ArgTy = I.getArgOperand(ArgI)->getType();
9676 if (!ArgTy->isVectorTy())
9678 NumElts += getTargetData()->getTypeAllocSize(ArgTy) / 8;
9680 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
9681 Info.ptrVal = I.getArgOperand(0);
9683 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
9684 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
9685 Info.vol = false; // volatile stores with NEON intrinsics not supported
9686 Info.readMem = false;
9687 Info.writeMem = true;
9690 case Intrinsic::arm_strexd: {
9691 Info.opc = ISD::INTRINSIC_W_CHAIN;
9692 Info.memVT = MVT::i64;
9693 Info.ptrVal = I.getArgOperand(2);
9697 Info.readMem = false;
9698 Info.writeMem = true;
9701 case Intrinsic::arm_ldrexd: {
9702 Info.opc = ISD::INTRINSIC_W_CHAIN;
9703 Info.memVT = MVT::i64;
9704 Info.ptrVal = I.getArgOperand(0);
9708 Info.readMem = true;
9709 Info.writeMem = false;