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"
17 #include "ARMCallingConv.h"
18 #include "ARMConstantPoolValue.h"
19 #include "ARMISelLowering.h"
20 #include "ARMMachineFunctionInfo.h"
21 #include "ARMPerfectShuffle.h"
22 #include "ARMRegisterInfo.h"
23 #include "ARMSubtarget.h"
24 #include "ARMTargetMachine.h"
25 #include "ARMTargetObjectFile.h"
26 #include "MCTargetDesc/ARMAddressingModes.h"
27 #include "llvm/CallingConv.h"
28 #include "llvm/Constants.h"
29 #include "llvm/Function.h"
30 #include "llvm/GlobalValue.h"
31 #include "llvm/Instruction.h"
32 #include "llvm/Instructions.h"
33 #include "llvm/Intrinsics.h"
34 #include "llvm/Type.h"
35 #include "llvm/CodeGen/CallingConvLower.h"
36 #include "llvm/CodeGen/IntrinsicLowering.h"
37 #include "llvm/CodeGen/MachineBasicBlock.h"
38 #include "llvm/CodeGen/MachineFrameInfo.h"
39 #include "llvm/CodeGen/MachineFunction.h"
40 #include "llvm/CodeGen/MachineInstrBuilder.h"
41 #include "llvm/CodeGen/MachineModuleInfo.h"
42 #include "llvm/CodeGen/MachineRegisterInfo.h"
43 #include "llvm/CodeGen/SelectionDAG.h"
44 #include "llvm/MC/MCSectionMachO.h"
45 #include "llvm/Target/TargetOptions.h"
46 #include "llvm/ADT/StringExtras.h"
47 #include "llvm/ADT/Statistic.h"
48 #include "llvm/Support/CommandLine.h"
49 #include "llvm/Support/ErrorHandling.h"
50 #include "llvm/Support/MathExtras.h"
51 #include "llvm/Support/raw_ostream.h"
55 STATISTIC(NumTailCalls, "Number of tail calls");
56 STATISTIC(NumMovwMovt, "Number of GAs materialized with movw + movt");
58 // This option should go away when tail calls fully work.
60 EnableARMTailCalls("arm-tail-calls", cl::Hidden,
61 cl::desc("Generate tail calls (TEMPORARY OPTION)."),
65 EnableARMLongCalls("arm-long-calls", cl::Hidden,
66 cl::desc("Generate calls via indirect call instructions"),
70 ARMInterworking("arm-interworking", cl::Hidden,
71 cl::desc("Enable / disable ARM interworking (for debugging only)"),
75 class ARMCCState : public CCState {
77 ARMCCState(CallingConv::ID CC, bool isVarArg, MachineFunction &MF,
78 const TargetMachine &TM, SmallVector<CCValAssign, 16> &locs,
79 LLVMContext &C, ParmContext PC)
80 : CCState(CC, isVarArg, MF, TM, locs, C) {
81 assert(((PC == Call) || (PC == Prologue)) &&
82 "ARMCCState users must specify whether their context is call"
83 "or prologue generation.");
89 // The APCS parameter registers.
90 static const unsigned GPRArgRegs[] = {
91 ARM::R0, ARM::R1, ARM::R2, ARM::R3
94 void ARMTargetLowering::addTypeForNEON(EVT VT, EVT PromotedLdStVT,
95 EVT PromotedBitwiseVT) {
96 if (VT != PromotedLdStVT) {
97 setOperationAction(ISD::LOAD, VT.getSimpleVT(), Promote);
98 AddPromotedToType (ISD::LOAD, VT.getSimpleVT(),
99 PromotedLdStVT.getSimpleVT());
101 setOperationAction(ISD::STORE, VT.getSimpleVT(), Promote);
102 AddPromotedToType (ISD::STORE, VT.getSimpleVT(),
103 PromotedLdStVT.getSimpleVT());
106 EVT ElemTy = VT.getVectorElementType();
107 if (ElemTy != MVT::i64 && ElemTy != MVT::f64)
108 setOperationAction(ISD::SETCC, VT.getSimpleVT(), Custom);
109 setOperationAction(ISD::INSERT_VECTOR_ELT, VT.getSimpleVT(), Custom);
110 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT.getSimpleVT(), Custom);
111 if (ElemTy == MVT::i32) {
112 setOperationAction(ISD::SINT_TO_FP, VT.getSimpleVT(), Custom);
113 setOperationAction(ISD::UINT_TO_FP, VT.getSimpleVT(), Custom);
114 setOperationAction(ISD::FP_TO_SINT, VT.getSimpleVT(), Custom);
115 setOperationAction(ISD::FP_TO_UINT, VT.getSimpleVT(), Custom);
117 setOperationAction(ISD::SINT_TO_FP, VT.getSimpleVT(), Expand);
118 setOperationAction(ISD::UINT_TO_FP, VT.getSimpleVT(), Expand);
119 setOperationAction(ISD::FP_TO_SINT, VT.getSimpleVT(), Expand);
120 setOperationAction(ISD::FP_TO_UINT, VT.getSimpleVT(), Expand);
122 setOperationAction(ISD::BUILD_VECTOR, VT.getSimpleVT(), Custom);
123 setOperationAction(ISD::VECTOR_SHUFFLE, VT.getSimpleVT(), Custom);
124 setOperationAction(ISD::CONCAT_VECTORS, VT.getSimpleVT(), Legal);
125 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT.getSimpleVT(), Legal);
126 setOperationAction(ISD::SELECT, VT.getSimpleVT(), Expand);
127 setOperationAction(ISD::SELECT_CC, VT.getSimpleVT(), Expand);
128 setOperationAction(ISD::SIGN_EXTEND_INREG, VT.getSimpleVT(), Expand);
129 if (VT.isInteger()) {
130 setOperationAction(ISD::SHL, VT.getSimpleVT(), Custom);
131 setOperationAction(ISD::SRA, VT.getSimpleVT(), Custom);
132 setOperationAction(ISD::SRL, VT.getSimpleVT(), Custom);
135 // Promote all bit-wise operations.
136 if (VT.isInteger() && VT != PromotedBitwiseVT) {
137 setOperationAction(ISD::AND, VT.getSimpleVT(), Promote);
138 AddPromotedToType (ISD::AND, VT.getSimpleVT(),
139 PromotedBitwiseVT.getSimpleVT());
140 setOperationAction(ISD::OR, VT.getSimpleVT(), Promote);
141 AddPromotedToType (ISD::OR, VT.getSimpleVT(),
142 PromotedBitwiseVT.getSimpleVT());
143 setOperationAction(ISD::XOR, VT.getSimpleVT(), Promote);
144 AddPromotedToType (ISD::XOR, VT.getSimpleVT(),
145 PromotedBitwiseVT.getSimpleVT());
148 // Neon does not support vector divide/remainder operations.
149 setOperationAction(ISD::SDIV, VT.getSimpleVT(), Expand);
150 setOperationAction(ISD::UDIV, VT.getSimpleVT(), Expand);
151 setOperationAction(ISD::FDIV, VT.getSimpleVT(), Expand);
152 setOperationAction(ISD::SREM, VT.getSimpleVT(), Expand);
153 setOperationAction(ISD::UREM, VT.getSimpleVT(), Expand);
154 setOperationAction(ISD::FREM, VT.getSimpleVT(), Expand);
157 void ARMTargetLowering::addDRTypeForNEON(EVT VT) {
158 addRegisterClass(VT, ARM::DPRRegisterClass);
159 addTypeForNEON(VT, MVT::f64, MVT::v2i32);
162 void ARMTargetLowering::addQRTypeForNEON(EVT VT) {
163 addRegisterClass(VT, ARM::QPRRegisterClass);
164 addTypeForNEON(VT, MVT::v2f64, MVT::v4i32);
167 static TargetLoweringObjectFile *createTLOF(TargetMachine &TM) {
168 if (TM.getSubtarget<ARMSubtarget>().isTargetDarwin())
169 return new TargetLoweringObjectFileMachO();
171 return new ARMElfTargetObjectFile();
174 ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
175 : TargetLowering(TM, createTLOF(TM)) {
176 Subtarget = &TM.getSubtarget<ARMSubtarget>();
177 RegInfo = TM.getRegisterInfo();
178 Itins = TM.getInstrItineraryData();
180 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
182 if (Subtarget->isTargetDarwin()) {
183 // Uses VFP for Thumb libfuncs if available.
184 if (Subtarget->isThumb() && Subtarget->hasVFP2()) {
185 // Single-precision floating-point arithmetic.
186 setLibcallName(RTLIB::ADD_F32, "__addsf3vfp");
187 setLibcallName(RTLIB::SUB_F32, "__subsf3vfp");
188 setLibcallName(RTLIB::MUL_F32, "__mulsf3vfp");
189 setLibcallName(RTLIB::DIV_F32, "__divsf3vfp");
191 // Double-precision floating-point arithmetic.
192 setLibcallName(RTLIB::ADD_F64, "__adddf3vfp");
193 setLibcallName(RTLIB::SUB_F64, "__subdf3vfp");
194 setLibcallName(RTLIB::MUL_F64, "__muldf3vfp");
195 setLibcallName(RTLIB::DIV_F64, "__divdf3vfp");
197 // Single-precision comparisons.
198 setLibcallName(RTLIB::OEQ_F32, "__eqsf2vfp");
199 setLibcallName(RTLIB::UNE_F32, "__nesf2vfp");
200 setLibcallName(RTLIB::OLT_F32, "__ltsf2vfp");
201 setLibcallName(RTLIB::OLE_F32, "__lesf2vfp");
202 setLibcallName(RTLIB::OGE_F32, "__gesf2vfp");
203 setLibcallName(RTLIB::OGT_F32, "__gtsf2vfp");
204 setLibcallName(RTLIB::UO_F32, "__unordsf2vfp");
205 setLibcallName(RTLIB::O_F32, "__unordsf2vfp");
207 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
208 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETNE);
209 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
210 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
211 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
212 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
213 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
214 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
216 // Double-precision comparisons.
217 setLibcallName(RTLIB::OEQ_F64, "__eqdf2vfp");
218 setLibcallName(RTLIB::UNE_F64, "__nedf2vfp");
219 setLibcallName(RTLIB::OLT_F64, "__ltdf2vfp");
220 setLibcallName(RTLIB::OLE_F64, "__ledf2vfp");
221 setLibcallName(RTLIB::OGE_F64, "__gedf2vfp");
222 setLibcallName(RTLIB::OGT_F64, "__gtdf2vfp");
223 setLibcallName(RTLIB::UO_F64, "__unorddf2vfp");
224 setLibcallName(RTLIB::O_F64, "__unorddf2vfp");
226 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
227 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETNE);
228 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
229 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
230 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
231 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
232 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
233 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
235 // Floating-point to integer conversions.
236 // i64 conversions are done via library routines even when generating VFP
237 // instructions, so use the same ones.
238 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__fixdfsivfp");
239 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__fixunsdfsivfp");
240 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__fixsfsivfp");
241 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__fixunssfsivfp");
243 // Conversions between floating types.
244 setLibcallName(RTLIB::FPROUND_F64_F32, "__truncdfsf2vfp");
245 setLibcallName(RTLIB::FPEXT_F32_F64, "__extendsfdf2vfp");
247 // Integer to floating-point conversions.
248 // i64 conversions are done via library routines even when generating VFP
249 // instructions, so use the same ones.
250 // FIXME: There appears to be some naming inconsistency in ARM libgcc:
251 // e.g., __floatunsidf vs. __floatunssidfvfp.
252 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__floatsidfvfp");
253 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__floatunssidfvfp");
254 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__floatsisfvfp");
255 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__floatunssisfvfp");
259 // These libcalls are not available in 32-bit.
260 setLibcallName(RTLIB::SHL_I128, 0);
261 setLibcallName(RTLIB::SRL_I128, 0);
262 setLibcallName(RTLIB::SRA_I128, 0);
264 if (Subtarget->isAAPCS_ABI() && !Subtarget->isTargetDarwin()) {
265 // Double-precision floating-point arithmetic helper functions
266 // RTABI chapter 4.1.2, Table 2
267 setLibcallName(RTLIB::ADD_F64, "__aeabi_dadd");
268 setLibcallName(RTLIB::DIV_F64, "__aeabi_ddiv");
269 setLibcallName(RTLIB::MUL_F64, "__aeabi_dmul");
270 setLibcallName(RTLIB::SUB_F64, "__aeabi_dsub");
271 setLibcallCallingConv(RTLIB::ADD_F64, CallingConv::ARM_AAPCS);
272 setLibcallCallingConv(RTLIB::DIV_F64, CallingConv::ARM_AAPCS);
273 setLibcallCallingConv(RTLIB::MUL_F64, CallingConv::ARM_AAPCS);
274 setLibcallCallingConv(RTLIB::SUB_F64, CallingConv::ARM_AAPCS);
276 // Double-precision floating-point comparison helper functions
277 // RTABI chapter 4.1.2, Table 3
278 setLibcallName(RTLIB::OEQ_F64, "__aeabi_dcmpeq");
279 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
280 setLibcallName(RTLIB::UNE_F64, "__aeabi_dcmpeq");
281 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETEQ);
282 setLibcallName(RTLIB::OLT_F64, "__aeabi_dcmplt");
283 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
284 setLibcallName(RTLIB::OLE_F64, "__aeabi_dcmple");
285 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
286 setLibcallName(RTLIB::OGE_F64, "__aeabi_dcmpge");
287 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
288 setLibcallName(RTLIB::OGT_F64, "__aeabi_dcmpgt");
289 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
290 setLibcallName(RTLIB::UO_F64, "__aeabi_dcmpun");
291 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
292 setLibcallName(RTLIB::O_F64, "__aeabi_dcmpun");
293 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
294 setLibcallCallingConv(RTLIB::OEQ_F64, CallingConv::ARM_AAPCS);
295 setLibcallCallingConv(RTLIB::UNE_F64, CallingConv::ARM_AAPCS);
296 setLibcallCallingConv(RTLIB::OLT_F64, CallingConv::ARM_AAPCS);
297 setLibcallCallingConv(RTLIB::OLE_F64, CallingConv::ARM_AAPCS);
298 setLibcallCallingConv(RTLIB::OGE_F64, CallingConv::ARM_AAPCS);
299 setLibcallCallingConv(RTLIB::OGT_F64, CallingConv::ARM_AAPCS);
300 setLibcallCallingConv(RTLIB::UO_F64, CallingConv::ARM_AAPCS);
301 setLibcallCallingConv(RTLIB::O_F64, CallingConv::ARM_AAPCS);
303 // Single-precision floating-point arithmetic helper functions
304 // RTABI chapter 4.1.2, Table 4
305 setLibcallName(RTLIB::ADD_F32, "__aeabi_fadd");
306 setLibcallName(RTLIB::DIV_F32, "__aeabi_fdiv");
307 setLibcallName(RTLIB::MUL_F32, "__aeabi_fmul");
308 setLibcallName(RTLIB::SUB_F32, "__aeabi_fsub");
309 setLibcallCallingConv(RTLIB::ADD_F32, CallingConv::ARM_AAPCS);
310 setLibcallCallingConv(RTLIB::DIV_F32, CallingConv::ARM_AAPCS);
311 setLibcallCallingConv(RTLIB::MUL_F32, CallingConv::ARM_AAPCS);
312 setLibcallCallingConv(RTLIB::SUB_F32, CallingConv::ARM_AAPCS);
314 // Single-precision floating-point comparison helper functions
315 // RTABI chapter 4.1.2, Table 5
316 setLibcallName(RTLIB::OEQ_F32, "__aeabi_fcmpeq");
317 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
318 setLibcallName(RTLIB::UNE_F32, "__aeabi_fcmpeq");
319 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETEQ);
320 setLibcallName(RTLIB::OLT_F32, "__aeabi_fcmplt");
321 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
322 setLibcallName(RTLIB::OLE_F32, "__aeabi_fcmple");
323 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
324 setLibcallName(RTLIB::OGE_F32, "__aeabi_fcmpge");
325 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
326 setLibcallName(RTLIB::OGT_F32, "__aeabi_fcmpgt");
327 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
328 setLibcallName(RTLIB::UO_F32, "__aeabi_fcmpun");
329 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
330 setLibcallName(RTLIB::O_F32, "__aeabi_fcmpun");
331 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
332 setLibcallCallingConv(RTLIB::OEQ_F32, CallingConv::ARM_AAPCS);
333 setLibcallCallingConv(RTLIB::UNE_F32, CallingConv::ARM_AAPCS);
334 setLibcallCallingConv(RTLIB::OLT_F32, CallingConv::ARM_AAPCS);
335 setLibcallCallingConv(RTLIB::OLE_F32, CallingConv::ARM_AAPCS);
336 setLibcallCallingConv(RTLIB::OGE_F32, CallingConv::ARM_AAPCS);
337 setLibcallCallingConv(RTLIB::OGT_F32, CallingConv::ARM_AAPCS);
338 setLibcallCallingConv(RTLIB::UO_F32, CallingConv::ARM_AAPCS);
339 setLibcallCallingConv(RTLIB::O_F32, CallingConv::ARM_AAPCS);
341 // Floating-point to integer conversions.
342 // RTABI chapter 4.1.2, Table 6
343 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__aeabi_d2iz");
344 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__aeabi_d2uiz");
345 setLibcallName(RTLIB::FPTOSINT_F64_I64, "__aeabi_d2lz");
346 setLibcallName(RTLIB::FPTOUINT_F64_I64, "__aeabi_d2ulz");
347 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__aeabi_f2iz");
348 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__aeabi_f2uiz");
349 setLibcallName(RTLIB::FPTOSINT_F32_I64, "__aeabi_f2lz");
350 setLibcallName(RTLIB::FPTOUINT_F32_I64, "__aeabi_f2ulz");
351 setLibcallCallingConv(RTLIB::FPTOSINT_F64_I32, CallingConv::ARM_AAPCS);
352 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I32, CallingConv::ARM_AAPCS);
353 setLibcallCallingConv(RTLIB::FPTOSINT_F64_I64, CallingConv::ARM_AAPCS);
354 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I64, CallingConv::ARM_AAPCS);
355 setLibcallCallingConv(RTLIB::FPTOSINT_F32_I32, CallingConv::ARM_AAPCS);
356 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I32, CallingConv::ARM_AAPCS);
357 setLibcallCallingConv(RTLIB::FPTOSINT_F32_I64, CallingConv::ARM_AAPCS);
358 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I64, CallingConv::ARM_AAPCS);
360 // Conversions between floating types.
361 // RTABI chapter 4.1.2, Table 7
362 setLibcallName(RTLIB::FPROUND_F64_F32, "__aeabi_d2f");
363 setLibcallName(RTLIB::FPEXT_F32_F64, "__aeabi_f2d");
364 setLibcallCallingConv(RTLIB::FPROUND_F64_F32, CallingConv::ARM_AAPCS);
365 setLibcallCallingConv(RTLIB::FPEXT_F32_F64, CallingConv::ARM_AAPCS);
367 // Integer to floating-point conversions.
368 // RTABI chapter 4.1.2, Table 8
369 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__aeabi_i2d");
370 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__aeabi_ui2d");
371 setLibcallName(RTLIB::SINTTOFP_I64_F64, "__aeabi_l2d");
372 setLibcallName(RTLIB::UINTTOFP_I64_F64, "__aeabi_ul2d");
373 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__aeabi_i2f");
374 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__aeabi_ui2f");
375 setLibcallName(RTLIB::SINTTOFP_I64_F32, "__aeabi_l2f");
376 setLibcallName(RTLIB::UINTTOFP_I64_F32, "__aeabi_ul2f");
377 setLibcallCallingConv(RTLIB::SINTTOFP_I32_F64, CallingConv::ARM_AAPCS);
378 setLibcallCallingConv(RTLIB::UINTTOFP_I32_F64, CallingConv::ARM_AAPCS);
379 setLibcallCallingConv(RTLIB::SINTTOFP_I64_F64, CallingConv::ARM_AAPCS);
380 setLibcallCallingConv(RTLIB::UINTTOFP_I64_F64, CallingConv::ARM_AAPCS);
381 setLibcallCallingConv(RTLIB::SINTTOFP_I32_F32, CallingConv::ARM_AAPCS);
382 setLibcallCallingConv(RTLIB::UINTTOFP_I32_F32, CallingConv::ARM_AAPCS);
383 setLibcallCallingConv(RTLIB::SINTTOFP_I64_F32, CallingConv::ARM_AAPCS);
384 setLibcallCallingConv(RTLIB::UINTTOFP_I64_F32, CallingConv::ARM_AAPCS);
386 // Long long helper functions
387 // RTABI chapter 4.2, Table 9
388 setLibcallName(RTLIB::MUL_I64, "__aeabi_lmul");
389 setLibcallName(RTLIB::SHL_I64, "__aeabi_llsl");
390 setLibcallName(RTLIB::SRL_I64, "__aeabi_llsr");
391 setLibcallName(RTLIB::SRA_I64, "__aeabi_lasr");
392 setLibcallCallingConv(RTLIB::MUL_I64, CallingConv::ARM_AAPCS);
393 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::ARM_AAPCS);
394 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::ARM_AAPCS);
395 setLibcallCallingConv(RTLIB::SHL_I64, CallingConv::ARM_AAPCS);
396 setLibcallCallingConv(RTLIB::SRL_I64, CallingConv::ARM_AAPCS);
397 setLibcallCallingConv(RTLIB::SRA_I64, CallingConv::ARM_AAPCS);
399 // Integer division functions
400 // RTABI chapter 4.3.1
401 setLibcallName(RTLIB::SDIV_I8, "__aeabi_idiv");
402 setLibcallName(RTLIB::SDIV_I16, "__aeabi_idiv");
403 setLibcallName(RTLIB::SDIV_I32, "__aeabi_idiv");
404 setLibcallName(RTLIB::SDIV_I64, "__aeabi_ldivmod");
405 setLibcallName(RTLIB::UDIV_I8, "__aeabi_uidiv");
406 setLibcallName(RTLIB::UDIV_I16, "__aeabi_uidiv");
407 setLibcallName(RTLIB::UDIV_I32, "__aeabi_uidiv");
408 setLibcallName(RTLIB::UDIV_I64, "__aeabi_uldivmod");
409 setLibcallCallingConv(RTLIB::SDIV_I8, CallingConv::ARM_AAPCS);
410 setLibcallCallingConv(RTLIB::SDIV_I16, CallingConv::ARM_AAPCS);
411 setLibcallCallingConv(RTLIB::SDIV_I32, CallingConv::ARM_AAPCS);
412 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::ARM_AAPCS);
413 setLibcallCallingConv(RTLIB::UDIV_I8, CallingConv::ARM_AAPCS);
414 setLibcallCallingConv(RTLIB::UDIV_I16, CallingConv::ARM_AAPCS);
415 setLibcallCallingConv(RTLIB::UDIV_I32, CallingConv::ARM_AAPCS);
416 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::ARM_AAPCS);
419 // RTABI chapter 4.3.4
420 setLibcallName(RTLIB::MEMCPY, "__aeabi_memcpy");
421 setLibcallName(RTLIB::MEMMOVE, "__aeabi_memmove");
422 setLibcallName(RTLIB::MEMSET, "__aeabi_memset");
423 setLibcallCallingConv(RTLIB::MEMCPY, CallingConv::ARM_AAPCS);
424 setLibcallCallingConv(RTLIB::MEMMOVE, CallingConv::ARM_AAPCS);
425 setLibcallCallingConv(RTLIB::MEMSET, CallingConv::ARM_AAPCS);
428 // Use divmod compiler-rt calls for iOS 5.0 and later.
429 if (Subtarget->getTargetTriple().getOS() == Triple::IOS &&
430 !Subtarget->getTargetTriple().isOSVersionLT(5, 0)) {
431 setLibcallName(RTLIB::SDIVREM_I32, "__divmodsi4");
432 setLibcallName(RTLIB::UDIVREM_I32, "__udivmodsi4");
435 if (Subtarget->isThumb1Only())
436 addRegisterClass(MVT::i32, ARM::tGPRRegisterClass);
438 addRegisterClass(MVT::i32, ARM::GPRRegisterClass);
439 if (!TM.Options.UseSoftFloat && Subtarget->hasVFP2() &&
440 !Subtarget->isThumb1Only()) {
441 addRegisterClass(MVT::f32, ARM::SPRRegisterClass);
442 if (!Subtarget->isFPOnlySP())
443 addRegisterClass(MVT::f64, ARM::DPRRegisterClass);
445 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
448 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
449 VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
450 for (unsigned InnerVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
451 InnerVT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
452 setTruncStoreAction((MVT::SimpleValueType)VT,
453 (MVT::SimpleValueType)InnerVT, Expand);
454 setLoadExtAction(ISD::SEXTLOAD, (MVT::SimpleValueType)VT, Expand);
455 setLoadExtAction(ISD::ZEXTLOAD, (MVT::SimpleValueType)VT, Expand);
456 setLoadExtAction(ISD::EXTLOAD, (MVT::SimpleValueType)VT, Expand);
459 if (Subtarget->hasNEON()) {
460 addDRTypeForNEON(MVT::v2f32);
461 addDRTypeForNEON(MVT::v8i8);
462 addDRTypeForNEON(MVT::v4i16);
463 addDRTypeForNEON(MVT::v2i32);
464 addDRTypeForNEON(MVT::v1i64);
466 addQRTypeForNEON(MVT::v4f32);
467 addQRTypeForNEON(MVT::v2f64);
468 addQRTypeForNEON(MVT::v16i8);
469 addQRTypeForNEON(MVT::v8i16);
470 addQRTypeForNEON(MVT::v4i32);
471 addQRTypeForNEON(MVT::v2i64);
473 // v2f64 is legal so that QR subregs can be extracted as f64 elements, but
474 // neither Neon nor VFP support any arithmetic operations on it.
475 // The same with v4f32. But keep in mind that vadd, vsub, vmul are natively
476 // supported for v4f32.
477 setOperationAction(ISD::FADD, MVT::v2f64, Expand);
478 setOperationAction(ISD::FSUB, MVT::v2f64, Expand);
479 setOperationAction(ISD::FMUL, MVT::v2f64, Expand);
480 // FIXME: Code duplication: FDIV and FREM are expanded always, see
481 // ARMTargetLowering::addTypeForNEON method for details.
482 setOperationAction(ISD::FDIV, MVT::v2f64, Expand);
483 setOperationAction(ISD::FREM, MVT::v2f64, Expand);
484 // FIXME: Create unittest.
485 // In another words, find a way when "copysign" appears in DAG with vector
487 setOperationAction(ISD::FCOPYSIGN, MVT::v2f64, Expand);
488 // FIXME: Code duplication: SETCC has custom operation action, see
489 // ARMTargetLowering::addTypeForNEON method for details.
490 setOperationAction(ISD::SETCC, MVT::v2f64, Expand);
491 // FIXME: Create unittest for FNEG and for FABS.
492 setOperationAction(ISD::FNEG, MVT::v2f64, Expand);
493 setOperationAction(ISD::FABS, MVT::v2f64, Expand);
494 setOperationAction(ISD::FSQRT, MVT::v2f64, Expand);
495 setOperationAction(ISD::FSIN, MVT::v2f64, Expand);
496 setOperationAction(ISD::FCOS, MVT::v2f64, Expand);
497 setOperationAction(ISD::FPOWI, MVT::v2f64, Expand);
498 setOperationAction(ISD::FPOW, MVT::v2f64, Expand);
499 setOperationAction(ISD::FLOG, MVT::v2f64, Expand);
500 setOperationAction(ISD::FLOG2, MVT::v2f64, Expand);
501 setOperationAction(ISD::FLOG10, MVT::v2f64, Expand);
502 setOperationAction(ISD::FEXP, MVT::v2f64, Expand);
503 setOperationAction(ISD::FEXP2, MVT::v2f64, Expand);
504 // FIXME: Create unittest for FCEIL, FTRUNC, FRINT, FNEARBYINT, FFLOOR.
505 setOperationAction(ISD::FCEIL, MVT::v2f64, Expand);
506 setOperationAction(ISD::FTRUNC, MVT::v2f64, Expand);
507 setOperationAction(ISD::FRINT, MVT::v2f64, Expand);
508 setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Expand);
509 setOperationAction(ISD::FFLOOR, MVT::v2f64, Expand);
511 setOperationAction(ISD::FSQRT, MVT::v4f32, Expand);
512 setOperationAction(ISD::FSIN, MVT::v4f32, Expand);
513 setOperationAction(ISD::FCOS, MVT::v4f32, Expand);
514 setOperationAction(ISD::FPOWI, MVT::v4f32, Expand);
515 setOperationAction(ISD::FPOW, MVT::v4f32, Expand);
516 setOperationAction(ISD::FLOG, MVT::v4f32, Expand);
517 setOperationAction(ISD::FLOG2, MVT::v4f32, Expand);
518 setOperationAction(ISD::FLOG10, MVT::v4f32, Expand);
519 setOperationAction(ISD::FEXP, MVT::v4f32, Expand);
520 setOperationAction(ISD::FEXP2, MVT::v4f32, Expand);
522 // Neon does not support some operations on v1i64 and v2i64 types.
523 setOperationAction(ISD::MUL, MVT::v1i64, Expand);
524 // Custom handling for some quad-vector types to detect VMULL.
525 setOperationAction(ISD::MUL, MVT::v8i16, Custom);
526 setOperationAction(ISD::MUL, MVT::v4i32, Custom);
527 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
528 // Custom handling for some vector types to avoid expensive expansions
529 setOperationAction(ISD::SDIV, MVT::v4i16, Custom);
530 setOperationAction(ISD::SDIV, MVT::v8i8, Custom);
531 setOperationAction(ISD::UDIV, MVT::v4i16, Custom);
532 setOperationAction(ISD::UDIV, MVT::v8i8, Custom);
533 setOperationAction(ISD::SETCC, MVT::v1i64, Expand);
534 setOperationAction(ISD::SETCC, MVT::v2i64, Expand);
535 // Neon does not have single instruction SINT_TO_FP and UINT_TO_FP with
536 // a destination type that is wider than the source, and nor does
537 // it have a FP_TO_[SU]INT instruction with a narrower destination than
539 setOperationAction(ISD::SINT_TO_FP, MVT::v4i16, Custom);
540 setOperationAction(ISD::UINT_TO_FP, MVT::v4i16, Custom);
541 setOperationAction(ISD::FP_TO_UINT, MVT::v4i16, Custom);
542 setOperationAction(ISD::FP_TO_SINT, MVT::v4i16, Custom);
544 setTargetDAGCombine(ISD::INTRINSIC_VOID);
545 setTargetDAGCombine(ISD::INTRINSIC_W_CHAIN);
546 setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);
547 setTargetDAGCombine(ISD::SHL);
548 setTargetDAGCombine(ISD::SRL);
549 setTargetDAGCombine(ISD::SRA);
550 setTargetDAGCombine(ISD::SIGN_EXTEND);
551 setTargetDAGCombine(ISD::ZERO_EXTEND);
552 setTargetDAGCombine(ISD::ANY_EXTEND);
553 setTargetDAGCombine(ISD::SELECT_CC);
554 setTargetDAGCombine(ISD::BUILD_VECTOR);
555 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
556 setTargetDAGCombine(ISD::INSERT_VECTOR_ELT);
557 setTargetDAGCombine(ISD::STORE);
558 setTargetDAGCombine(ISD::FP_TO_SINT);
559 setTargetDAGCombine(ISD::FP_TO_UINT);
560 setTargetDAGCombine(ISD::FDIV);
562 // It is legal to extload from v4i8 to v4i16 or v4i32.
563 MVT Tys[6] = {MVT::v8i8, MVT::v4i8, MVT::v2i8,
564 MVT::v4i16, MVT::v2i16,
566 for (unsigned i = 0; i < 6; ++i) {
567 setLoadExtAction(ISD::EXTLOAD, Tys[i], Legal);
568 setLoadExtAction(ISD::ZEXTLOAD, Tys[i], Legal);
569 setLoadExtAction(ISD::SEXTLOAD, Tys[i], Legal);
573 computeRegisterProperties();
575 // ARM does not have f32 extending load.
576 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
578 // ARM does not have i1 sign extending load.
579 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
581 // ARM supports all 4 flavors of integer indexed load / store.
582 if (!Subtarget->isThumb1Only()) {
583 for (unsigned im = (unsigned)ISD::PRE_INC;
584 im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) {
585 setIndexedLoadAction(im, MVT::i1, Legal);
586 setIndexedLoadAction(im, MVT::i8, Legal);
587 setIndexedLoadAction(im, MVT::i16, Legal);
588 setIndexedLoadAction(im, MVT::i32, Legal);
589 setIndexedStoreAction(im, MVT::i1, Legal);
590 setIndexedStoreAction(im, MVT::i8, Legal);
591 setIndexedStoreAction(im, MVT::i16, Legal);
592 setIndexedStoreAction(im, MVT::i32, Legal);
596 // i64 operation support.
597 setOperationAction(ISD::MUL, MVT::i64, Expand);
598 setOperationAction(ISD::MULHU, MVT::i32, Expand);
599 if (Subtarget->isThumb1Only()) {
600 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
601 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
603 if (Subtarget->isThumb1Only() || !Subtarget->hasV6Ops()
604 || (Subtarget->isThumb2() && !Subtarget->hasThumb2DSP()))
605 setOperationAction(ISD::MULHS, MVT::i32, Expand);
607 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
608 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
609 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
610 setOperationAction(ISD::SRL, MVT::i64, Custom);
611 setOperationAction(ISD::SRA, MVT::i64, Custom);
613 if (!Subtarget->isThumb1Only()) {
614 // FIXME: We should do this for Thumb1 as well.
615 setOperationAction(ISD::ADDC, MVT::i32, Custom);
616 setOperationAction(ISD::ADDE, MVT::i32, Custom);
617 setOperationAction(ISD::SUBC, MVT::i32, Custom);
618 setOperationAction(ISD::SUBE, MVT::i32, Custom);
621 // ARM does not have ROTL.
622 setOperationAction(ISD::ROTL, MVT::i32, Expand);
623 setOperationAction(ISD::CTTZ, MVT::i32, Custom);
624 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
625 if (!Subtarget->hasV5TOps() || Subtarget->isThumb1Only())
626 setOperationAction(ISD::CTLZ, MVT::i32, Expand);
628 // These just redirect to CTTZ and CTLZ on ARM.
629 setOperationAction(ISD::CTTZ_ZERO_UNDEF , MVT::i32 , Expand);
630 setOperationAction(ISD::CTLZ_ZERO_UNDEF , MVT::i32 , Expand);
632 // Only ARMv6 has BSWAP.
633 if (!Subtarget->hasV6Ops())
634 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
636 // These are expanded into libcalls.
637 if (!Subtarget->hasDivide() || !Subtarget->isThumb2()) {
638 // v7M has a hardware divider
639 setOperationAction(ISD::SDIV, MVT::i32, Expand);
640 setOperationAction(ISD::UDIV, MVT::i32, Expand);
642 setOperationAction(ISD::SREM, MVT::i32, Expand);
643 setOperationAction(ISD::UREM, MVT::i32, Expand);
644 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
645 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
647 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
648 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
649 setOperationAction(ISD::GLOBAL_OFFSET_TABLE, MVT::i32, Custom);
650 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
651 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
653 setOperationAction(ISD::TRAP, MVT::Other, Legal);
655 // Use the default implementation.
656 setOperationAction(ISD::VASTART, MVT::Other, Custom);
657 setOperationAction(ISD::VAARG, MVT::Other, Expand);
658 setOperationAction(ISD::VACOPY, MVT::Other, Expand);
659 setOperationAction(ISD::VAEND, MVT::Other, Expand);
660 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
661 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
663 if (!Subtarget->isTargetDarwin()) {
664 // Non-Darwin platforms may return values in these registers via the
665 // personality function.
666 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
667 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
668 setExceptionPointerRegister(ARM::R0);
669 setExceptionSelectorRegister(ARM::R1);
672 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
673 // ARMv6 Thumb1 (except for CPUs that support dmb / dsb) and earlier use
674 // the default expansion.
675 // FIXME: This should be checking for v6k, not just v6.
676 if (Subtarget->hasDataBarrier() ||
677 (Subtarget->hasV6Ops() && !Subtarget->isThumb())) {
678 // membarrier needs custom lowering; the rest are legal and handled
680 setOperationAction(ISD::MEMBARRIER, MVT::Other, Custom);
681 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
682 // Custom lowering for 64-bit ops
683 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i64, Custom);
684 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
685 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i64, Custom);
686 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i64, Custom);
687 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Custom);
688 setOperationAction(ISD::ATOMIC_SWAP, MVT::i64, Custom);
689 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i64, Custom);
690 // Automatically insert fences (dmb ist) around ATOMIC_SWAP etc.
691 setInsertFencesForAtomic(true);
693 // Set them all for expansion, which will force libcalls.
694 setOperationAction(ISD::MEMBARRIER, MVT::Other, Expand);
695 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Expand);
696 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Expand);
697 setOperationAction(ISD::ATOMIC_SWAP, MVT::i32, Expand);
698 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i32, Expand);
699 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i32, Expand);
700 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i32, Expand);
701 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i32, Expand);
702 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i32, Expand);
703 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i32, Expand);
704 setOperationAction(ISD::ATOMIC_LOAD_MIN, MVT::i32, Expand);
705 setOperationAction(ISD::ATOMIC_LOAD_MAX, MVT::i32, Expand);
706 setOperationAction(ISD::ATOMIC_LOAD_UMIN, MVT::i32, Expand);
707 setOperationAction(ISD::ATOMIC_LOAD_UMAX, MVT::i32, Expand);
708 // Mark ATOMIC_LOAD and ATOMIC_STORE custom so we can handle the
709 // Unordered/Monotonic case.
710 setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Custom);
711 setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Custom);
712 // Since the libcalls include locking, fold in the fences
713 setShouldFoldAtomicFences(true);
716 setOperationAction(ISD::PREFETCH, MVT::Other, Custom);
718 // Requires SXTB/SXTH, available on v6 and up in both ARM and Thumb modes.
719 if (!Subtarget->hasV6Ops()) {
720 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
721 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand);
723 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
725 if (!TM.Options.UseSoftFloat && Subtarget->hasVFP2() &&
726 !Subtarget->isThumb1Only()) {
727 // Turn f64->i64 into VMOVRRD, i64 -> f64 to VMOVDRR
728 // iff target supports vfp2.
729 setOperationAction(ISD::BITCAST, MVT::i64, Custom);
730 setOperationAction(ISD::FLT_ROUNDS_, MVT::i32, Custom);
733 // We want to custom lower some of our intrinsics.
734 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
735 if (Subtarget->isTargetDarwin()) {
736 setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
737 setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
738 setLibcallName(RTLIB::UNWIND_RESUME, "_Unwind_SjLj_Resume");
741 setOperationAction(ISD::SETCC, MVT::i32, Expand);
742 setOperationAction(ISD::SETCC, MVT::f32, Expand);
743 setOperationAction(ISD::SETCC, MVT::f64, Expand);
744 setOperationAction(ISD::SELECT, MVT::i32, Custom);
745 setOperationAction(ISD::SELECT, MVT::f32, Custom);
746 setOperationAction(ISD::SELECT, MVT::f64, Custom);
747 setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
748 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
749 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
751 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
752 setOperationAction(ISD::BR_CC, MVT::i32, Custom);
753 setOperationAction(ISD::BR_CC, MVT::f32, Custom);
754 setOperationAction(ISD::BR_CC, MVT::f64, Custom);
755 setOperationAction(ISD::BR_JT, MVT::Other, Custom);
757 // We don't support sin/cos/fmod/copysign/pow
758 setOperationAction(ISD::FSIN, MVT::f64, Expand);
759 setOperationAction(ISD::FSIN, MVT::f32, Expand);
760 setOperationAction(ISD::FCOS, MVT::f32, Expand);
761 setOperationAction(ISD::FCOS, MVT::f64, Expand);
762 setOperationAction(ISD::FREM, MVT::f64, Expand);
763 setOperationAction(ISD::FREM, MVT::f32, Expand);
764 if (!TM.Options.UseSoftFloat && Subtarget->hasVFP2() &&
765 !Subtarget->isThumb1Only()) {
766 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
767 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
769 setOperationAction(ISD::FPOW, MVT::f64, Expand);
770 setOperationAction(ISD::FPOW, MVT::f32, Expand);
772 setOperationAction(ISD::FMA, MVT::f64, Expand);
773 setOperationAction(ISD::FMA, MVT::f32, Expand);
775 // Various VFP goodness
776 if (!TM.Options.UseSoftFloat && !Subtarget->isThumb1Only()) {
777 // int <-> fp are custom expanded into bit_convert + ARMISD ops.
778 if (Subtarget->hasVFP2()) {
779 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
780 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
781 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
782 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
784 // Special handling for half-precision FP.
785 if (!Subtarget->hasFP16()) {
786 setOperationAction(ISD::FP16_TO_FP32, MVT::f32, Expand);
787 setOperationAction(ISD::FP32_TO_FP16, MVT::i32, Expand);
791 // We have target-specific dag combine patterns for the following nodes:
792 // ARMISD::VMOVRRD - No need to call setTargetDAGCombine
793 setTargetDAGCombine(ISD::ADD);
794 setTargetDAGCombine(ISD::SUB);
795 setTargetDAGCombine(ISD::MUL);
797 if (Subtarget->hasV6T2Ops() || Subtarget->hasNEON())
798 setTargetDAGCombine(ISD::OR);
799 if (Subtarget->hasNEON())
800 setTargetDAGCombine(ISD::AND);
802 setStackPointerRegisterToSaveRestore(ARM::SP);
804 if (TM.Options.UseSoftFloat || Subtarget->isThumb1Only() ||
805 !Subtarget->hasVFP2())
806 setSchedulingPreference(Sched::RegPressure);
808 setSchedulingPreference(Sched::Hybrid);
810 //// temporary - rewrite interface to use type
811 maxStoresPerMemcpy = maxStoresPerMemcpyOptSize = 1;
812 maxStoresPerMemset = 16;
813 maxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
815 // On ARM arguments smaller than 4 bytes are extended, so all arguments
816 // are at least 4 bytes aligned.
817 setMinStackArgumentAlignment(4);
819 benefitFromCodePlacementOpt = true;
821 setMinFunctionAlignment(Subtarget->isThumb() ? 1 : 2);
824 // FIXME: It might make sense to define the representative register class as the
825 // nearest super-register that has a non-null superset. For example, DPR_VFP2 is
826 // a super-register of SPR, and DPR is a superset if DPR_VFP2. Consequently,
827 // SPR's representative would be DPR_VFP2. This should work well if register
828 // pressure tracking were modified such that a register use would increment the
829 // pressure of the register class's representative and all of it's super
830 // classes' representatives transitively. We have not implemented this because
831 // of the difficulty prior to coalescing of modeling operand register classes
832 // due to the common occurrence of cross class copies and subregister insertions
834 std::pair<const TargetRegisterClass*, uint8_t>
835 ARMTargetLowering::findRepresentativeClass(EVT VT) const{
836 const TargetRegisterClass *RRC = 0;
838 switch (VT.getSimpleVT().SimpleTy) {
840 return TargetLowering::findRepresentativeClass(VT);
841 // Use DPR as representative register class for all floating point
842 // and vector types. Since there are 32 SPR registers and 32 DPR registers so
843 // the cost is 1 for both f32 and f64.
844 case MVT::f32: case MVT::f64: case MVT::v8i8: case MVT::v4i16:
845 case MVT::v2i32: case MVT::v1i64: case MVT::v2f32:
846 RRC = ARM::DPRRegisterClass;
847 // When NEON is used for SP, only half of the register file is available
848 // because operations that define both SP and DP results will be constrained
849 // to the VFP2 class (D0-D15). We currently model this constraint prior to
850 // coalescing by double-counting the SP regs. See the FIXME above.
851 if (Subtarget->useNEONForSinglePrecisionFP())
854 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
855 case MVT::v4f32: case MVT::v2f64:
856 RRC = ARM::DPRRegisterClass;
860 RRC = ARM::DPRRegisterClass;
864 RRC = ARM::DPRRegisterClass;
868 return std::make_pair(RRC, Cost);
871 const char *ARMTargetLowering::getTargetNodeName(unsigned Opcode) const {
874 case ARMISD::Wrapper: return "ARMISD::Wrapper";
875 case ARMISD::WrapperDYN: return "ARMISD::WrapperDYN";
876 case ARMISD::WrapperPIC: return "ARMISD::WrapperPIC";
877 case ARMISD::WrapperJT: return "ARMISD::WrapperJT";
878 case ARMISD::CALL: return "ARMISD::CALL";
879 case ARMISD::CALL_PRED: return "ARMISD::CALL_PRED";
880 case ARMISD::CALL_NOLINK: return "ARMISD::CALL_NOLINK";
881 case ARMISD::tCALL: return "ARMISD::tCALL";
882 case ARMISD::BRCOND: return "ARMISD::BRCOND";
883 case ARMISD::BR_JT: return "ARMISD::BR_JT";
884 case ARMISD::BR2_JT: return "ARMISD::BR2_JT";
885 case ARMISD::RET_FLAG: return "ARMISD::RET_FLAG";
886 case ARMISD::PIC_ADD: return "ARMISD::PIC_ADD";
887 case ARMISD::CMP: return "ARMISD::CMP";
888 case ARMISD::CMPZ: return "ARMISD::CMPZ";
889 case ARMISD::CMPFP: return "ARMISD::CMPFP";
890 case ARMISD::CMPFPw0: return "ARMISD::CMPFPw0";
891 case ARMISD::BCC_i64: return "ARMISD::BCC_i64";
892 case ARMISD::FMSTAT: return "ARMISD::FMSTAT";
893 case ARMISD::CMOV: return "ARMISD::CMOV";
895 case ARMISD::RBIT: return "ARMISD::RBIT";
897 case ARMISD::FTOSI: return "ARMISD::FTOSI";
898 case ARMISD::FTOUI: return "ARMISD::FTOUI";
899 case ARMISD::SITOF: return "ARMISD::SITOF";
900 case ARMISD::UITOF: return "ARMISD::UITOF";
902 case ARMISD::SRL_FLAG: return "ARMISD::SRL_FLAG";
903 case ARMISD::SRA_FLAG: return "ARMISD::SRA_FLAG";
904 case ARMISD::RRX: return "ARMISD::RRX";
906 case ARMISD::ADDC: return "ARMISD::ADDC";
907 case ARMISD::ADDE: return "ARMISD::ADDE";
908 case ARMISD::SUBC: return "ARMISD::SUBC";
909 case ARMISD::SUBE: return "ARMISD::SUBE";
911 case ARMISD::VMOVRRD: return "ARMISD::VMOVRRD";
912 case ARMISD::VMOVDRR: return "ARMISD::VMOVDRR";
914 case ARMISD::EH_SJLJ_SETJMP: return "ARMISD::EH_SJLJ_SETJMP";
915 case ARMISD::EH_SJLJ_LONGJMP:return "ARMISD::EH_SJLJ_LONGJMP";
917 case ARMISD::TC_RETURN: return "ARMISD::TC_RETURN";
919 case ARMISD::THREAD_POINTER:return "ARMISD::THREAD_POINTER";
921 case ARMISD::DYN_ALLOC: return "ARMISD::DYN_ALLOC";
923 case ARMISD::MEMBARRIER: return "ARMISD::MEMBARRIER";
924 case ARMISD::MEMBARRIER_MCR: return "ARMISD::MEMBARRIER_MCR";
926 case ARMISD::PRELOAD: return "ARMISD::PRELOAD";
928 case ARMISD::VCEQ: return "ARMISD::VCEQ";
929 case ARMISD::VCEQZ: return "ARMISD::VCEQZ";
930 case ARMISD::VCGE: return "ARMISD::VCGE";
931 case ARMISD::VCGEZ: return "ARMISD::VCGEZ";
932 case ARMISD::VCLEZ: return "ARMISD::VCLEZ";
933 case ARMISD::VCGEU: return "ARMISD::VCGEU";
934 case ARMISD::VCGT: return "ARMISD::VCGT";
935 case ARMISD::VCGTZ: return "ARMISD::VCGTZ";
936 case ARMISD::VCLTZ: return "ARMISD::VCLTZ";
937 case ARMISD::VCGTU: return "ARMISD::VCGTU";
938 case ARMISD::VTST: return "ARMISD::VTST";
940 case ARMISD::VSHL: return "ARMISD::VSHL";
941 case ARMISD::VSHRs: return "ARMISD::VSHRs";
942 case ARMISD::VSHRu: return "ARMISD::VSHRu";
943 case ARMISD::VSHLLs: return "ARMISD::VSHLLs";
944 case ARMISD::VSHLLu: return "ARMISD::VSHLLu";
945 case ARMISD::VSHLLi: return "ARMISD::VSHLLi";
946 case ARMISD::VSHRN: return "ARMISD::VSHRN";
947 case ARMISD::VRSHRs: return "ARMISD::VRSHRs";
948 case ARMISD::VRSHRu: return "ARMISD::VRSHRu";
949 case ARMISD::VRSHRN: return "ARMISD::VRSHRN";
950 case ARMISD::VQSHLs: return "ARMISD::VQSHLs";
951 case ARMISD::VQSHLu: return "ARMISD::VQSHLu";
952 case ARMISD::VQSHLsu: return "ARMISD::VQSHLsu";
953 case ARMISD::VQSHRNs: return "ARMISD::VQSHRNs";
954 case ARMISD::VQSHRNu: return "ARMISD::VQSHRNu";
955 case ARMISD::VQSHRNsu: return "ARMISD::VQSHRNsu";
956 case ARMISD::VQRSHRNs: return "ARMISD::VQRSHRNs";
957 case ARMISD::VQRSHRNu: return "ARMISD::VQRSHRNu";
958 case ARMISD::VQRSHRNsu: return "ARMISD::VQRSHRNsu";
959 case ARMISD::VGETLANEu: return "ARMISD::VGETLANEu";
960 case ARMISD::VGETLANEs: return "ARMISD::VGETLANEs";
961 case ARMISD::VMOVIMM: return "ARMISD::VMOVIMM";
962 case ARMISD::VMVNIMM: return "ARMISD::VMVNIMM";
963 case ARMISD::VMOVFPIMM: return "ARMISD::VMOVFPIMM";
964 case ARMISD::VDUP: return "ARMISD::VDUP";
965 case ARMISD::VDUPLANE: return "ARMISD::VDUPLANE";
966 case ARMISD::VEXT: return "ARMISD::VEXT";
967 case ARMISD::VREV64: return "ARMISD::VREV64";
968 case ARMISD::VREV32: return "ARMISD::VREV32";
969 case ARMISD::VREV16: return "ARMISD::VREV16";
970 case ARMISD::VZIP: return "ARMISD::VZIP";
971 case ARMISD::VUZP: return "ARMISD::VUZP";
972 case ARMISD::VTRN: return "ARMISD::VTRN";
973 case ARMISD::VTBL1: return "ARMISD::VTBL1";
974 case ARMISD::VTBL2: return "ARMISD::VTBL2";
975 case ARMISD::VMULLs: return "ARMISD::VMULLs";
976 case ARMISD::VMULLu: return "ARMISD::VMULLu";
977 case ARMISD::BUILD_VECTOR: return "ARMISD::BUILD_VECTOR";
978 case ARMISD::FMAX: return "ARMISD::FMAX";
979 case ARMISD::FMIN: return "ARMISD::FMIN";
980 case ARMISD::BFI: return "ARMISD::BFI";
981 case ARMISD::VORRIMM: return "ARMISD::VORRIMM";
982 case ARMISD::VBICIMM: return "ARMISD::VBICIMM";
983 case ARMISD::VBSL: return "ARMISD::VBSL";
984 case ARMISD::VLD2DUP: return "ARMISD::VLD2DUP";
985 case ARMISD::VLD3DUP: return "ARMISD::VLD3DUP";
986 case ARMISD::VLD4DUP: return "ARMISD::VLD4DUP";
987 case ARMISD::VLD1_UPD: return "ARMISD::VLD1_UPD";
988 case ARMISD::VLD2_UPD: return "ARMISD::VLD2_UPD";
989 case ARMISD::VLD3_UPD: return "ARMISD::VLD3_UPD";
990 case ARMISD::VLD4_UPD: return "ARMISD::VLD4_UPD";
991 case ARMISD::VLD2LN_UPD: return "ARMISD::VLD2LN_UPD";
992 case ARMISD::VLD3LN_UPD: return "ARMISD::VLD3LN_UPD";
993 case ARMISD::VLD4LN_UPD: return "ARMISD::VLD4LN_UPD";
994 case ARMISD::VLD2DUP_UPD: return "ARMISD::VLD2DUP_UPD";
995 case ARMISD::VLD3DUP_UPD: return "ARMISD::VLD3DUP_UPD";
996 case ARMISD::VLD4DUP_UPD: return "ARMISD::VLD4DUP_UPD";
997 case ARMISD::VST1_UPD: return "ARMISD::VST1_UPD";
998 case ARMISD::VST2_UPD: return "ARMISD::VST2_UPD";
999 case ARMISD::VST3_UPD: return "ARMISD::VST3_UPD";
1000 case ARMISD::VST4_UPD: return "ARMISD::VST4_UPD";
1001 case ARMISD::VST2LN_UPD: return "ARMISD::VST2LN_UPD";
1002 case ARMISD::VST3LN_UPD: return "ARMISD::VST3LN_UPD";
1003 case ARMISD::VST4LN_UPD: return "ARMISD::VST4LN_UPD";
1007 EVT ARMTargetLowering::getSetCCResultType(EVT VT) const {
1008 if (!VT.isVector()) return getPointerTy();
1009 return VT.changeVectorElementTypeToInteger();
1012 /// getRegClassFor - Return the register class that should be used for the
1013 /// specified value type.
1014 const TargetRegisterClass *ARMTargetLowering::getRegClassFor(EVT VT) const {
1015 // Map v4i64 to QQ registers but do not make the type legal. Similarly map
1016 // v8i64 to QQQQ registers. v4i64 and v8i64 are only used for REG_SEQUENCE to
1017 // load / store 4 to 8 consecutive D registers.
1018 if (Subtarget->hasNEON()) {
1019 if (VT == MVT::v4i64)
1020 return ARM::QQPRRegisterClass;
1021 else if (VT == MVT::v8i64)
1022 return ARM::QQQQPRRegisterClass;
1024 return TargetLowering::getRegClassFor(VT);
1027 // Create a fast isel object.
1029 ARMTargetLowering::createFastISel(FunctionLoweringInfo &funcInfo) const {
1030 return ARM::createFastISel(funcInfo);
1033 /// getMaximalGlobalOffset - Returns the maximal possible offset which can
1034 /// be used for loads / stores from the global.
1035 unsigned ARMTargetLowering::getMaximalGlobalOffset() const {
1036 return (Subtarget->isThumb1Only() ? 127 : 4095);
1039 Sched::Preference ARMTargetLowering::getSchedulingPreference(SDNode *N) const {
1040 unsigned NumVals = N->getNumValues();
1042 return Sched::RegPressure;
1044 for (unsigned i = 0; i != NumVals; ++i) {
1045 EVT VT = N->getValueType(i);
1046 if (VT == MVT::Glue || VT == MVT::Other)
1048 if (VT.isFloatingPoint() || VT.isVector())
1052 if (!N->isMachineOpcode())
1053 return Sched::RegPressure;
1055 // Load are scheduled for latency even if there instruction itinerary
1056 // is not available.
1057 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1058 const MCInstrDesc &MCID = TII->get(N->getMachineOpcode());
1060 if (MCID.getNumDefs() == 0)
1061 return Sched::RegPressure;
1062 if (!Itins->isEmpty() &&
1063 Itins->getOperandCycle(MCID.getSchedClass(), 0) > 2)
1066 return Sched::RegPressure;
1069 //===----------------------------------------------------------------------===//
1071 //===----------------------------------------------------------------------===//
1073 /// IntCCToARMCC - Convert a DAG integer condition code to an ARM CC
1074 static ARMCC::CondCodes IntCCToARMCC(ISD::CondCode CC) {
1076 default: llvm_unreachable("Unknown condition code!");
1077 case ISD::SETNE: return ARMCC::NE;
1078 case ISD::SETEQ: return ARMCC::EQ;
1079 case ISD::SETGT: return ARMCC::GT;
1080 case ISD::SETGE: return ARMCC::GE;
1081 case ISD::SETLT: return ARMCC::LT;
1082 case ISD::SETLE: return ARMCC::LE;
1083 case ISD::SETUGT: return ARMCC::HI;
1084 case ISD::SETUGE: return ARMCC::HS;
1085 case ISD::SETULT: return ARMCC::LO;
1086 case ISD::SETULE: return ARMCC::LS;
1090 /// FPCCToARMCC - Convert a DAG fp condition code to an ARM CC.
1091 static void FPCCToARMCC(ISD::CondCode CC, ARMCC::CondCodes &CondCode,
1092 ARMCC::CondCodes &CondCode2) {
1093 CondCode2 = ARMCC::AL;
1095 default: llvm_unreachable("Unknown FP condition!");
1097 case ISD::SETOEQ: CondCode = ARMCC::EQ; break;
1099 case ISD::SETOGT: CondCode = ARMCC::GT; break;
1101 case ISD::SETOGE: CondCode = ARMCC::GE; break;
1102 case ISD::SETOLT: CondCode = ARMCC::MI; break;
1103 case ISD::SETOLE: CondCode = ARMCC::LS; break;
1104 case ISD::SETONE: CondCode = ARMCC::MI; CondCode2 = ARMCC::GT; break;
1105 case ISD::SETO: CondCode = ARMCC::VC; break;
1106 case ISD::SETUO: CondCode = ARMCC::VS; break;
1107 case ISD::SETUEQ: CondCode = ARMCC::EQ; CondCode2 = ARMCC::VS; break;
1108 case ISD::SETUGT: CondCode = ARMCC::HI; break;
1109 case ISD::SETUGE: CondCode = ARMCC::PL; break;
1111 case ISD::SETULT: CondCode = ARMCC::LT; break;
1113 case ISD::SETULE: CondCode = ARMCC::LE; break;
1115 case ISD::SETUNE: CondCode = ARMCC::NE; break;
1119 //===----------------------------------------------------------------------===//
1120 // Calling Convention Implementation
1121 //===----------------------------------------------------------------------===//
1123 #include "ARMGenCallingConv.inc"
1125 /// CCAssignFnForNode - Selects the correct CCAssignFn for a the
1126 /// given CallingConvention value.
1127 CCAssignFn *ARMTargetLowering::CCAssignFnForNode(CallingConv::ID CC,
1129 bool isVarArg) const {
1132 llvm_unreachable("Unsupported calling convention");
1133 case CallingConv::Fast:
1134 if (Subtarget->hasVFP2() && !isVarArg) {
1135 if (!Subtarget->isAAPCS_ABI())
1136 return (Return ? RetFastCC_ARM_APCS : FastCC_ARM_APCS);
1137 // For AAPCS ABI targets, just use VFP variant of the calling convention.
1138 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1141 case CallingConv::C: {
1142 // Use target triple & subtarget features to do actual dispatch.
1143 if (!Subtarget->isAAPCS_ABI())
1144 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
1145 else if (Subtarget->hasVFP2() &&
1146 getTargetMachine().Options.FloatABIType == FloatABI::Hard &&
1148 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1149 return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
1151 case CallingConv::ARM_AAPCS_VFP:
1153 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1155 case CallingConv::ARM_AAPCS:
1156 return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
1157 case CallingConv::ARM_APCS:
1158 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
1162 /// LowerCallResult - Lower the result values of a call into the
1163 /// appropriate copies out of appropriate physical registers.
1165 ARMTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1166 CallingConv::ID CallConv, bool isVarArg,
1167 const SmallVectorImpl<ISD::InputArg> &Ins,
1168 DebugLoc dl, SelectionDAG &DAG,
1169 SmallVectorImpl<SDValue> &InVals) const {
1171 // Assign locations to each value returned by this call.
1172 SmallVector<CCValAssign, 16> RVLocs;
1173 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1174 getTargetMachine(), RVLocs, *DAG.getContext(), Call);
1175 CCInfo.AnalyzeCallResult(Ins,
1176 CCAssignFnForNode(CallConv, /* Return*/ true,
1179 // Copy all of the result registers out of their specified physreg.
1180 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1181 CCValAssign VA = RVLocs[i];
1184 if (VA.needsCustom()) {
1185 // Handle f64 or half of a v2f64.
1186 SDValue Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1188 Chain = Lo.getValue(1);
1189 InFlag = Lo.getValue(2);
1190 VA = RVLocs[++i]; // skip ahead to next loc
1191 SDValue Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1193 Chain = Hi.getValue(1);
1194 InFlag = Hi.getValue(2);
1195 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1197 if (VA.getLocVT() == MVT::v2f64) {
1198 SDValue Vec = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
1199 Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1200 DAG.getConstant(0, MVT::i32));
1202 VA = RVLocs[++i]; // skip ahead to next loc
1203 Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1204 Chain = Lo.getValue(1);
1205 InFlag = Lo.getValue(2);
1206 VA = RVLocs[++i]; // skip ahead to next loc
1207 Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1208 Chain = Hi.getValue(1);
1209 InFlag = Hi.getValue(2);
1210 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1211 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1212 DAG.getConstant(1, MVT::i32));
1215 Val = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), VA.getLocVT(),
1217 Chain = Val.getValue(1);
1218 InFlag = Val.getValue(2);
1221 switch (VA.getLocInfo()) {
1222 default: llvm_unreachable("Unknown loc info!");
1223 case CCValAssign::Full: break;
1224 case CCValAssign::BCvt:
1225 Val = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), Val);
1229 InVals.push_back(Val);
1235 /// LowerMemOpCallTo - Store the argument to the stack.
1237 ARMTargetLowering::LowerMemOpCallTo(SDValue Chain,
1238 SDValue StackPtr, SDValue Arg,
1239 DebugLoc dl, SelectionDAG &DAG,
1240 const CCValAssign &VA,
1241 ISD::ArgFlagsTy Flags) const {
1242 unsigned LocMemOffset = VA.getLocMemOffset();
1243 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
1244 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
1245 return DAG.getStore(Chain, dl, Arg, PtrOff,
1246 MachinePointerInfo::getStack(LocMemOffset),
1250 void ARMTargetLowering::PassF64ArgInRegs(DebugLoc dl, SelectionDAG &DAG,
1251 SDValue Chain, SDValue &Arg,
1252 RegsToPassVector &RegsToPass,
1253 CCValAssign &VA, CCValAssign &NextVA,
1255 SmallVector<SDValue, 8> &MemOpChains,
1256 ISD::ArgFlagsTy Flags) const {
1258 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
1259 DAG.getVTList(MVT::i32, MVT::i32), Arg);
1260 RegsToPass.push_back(std::make_pair(VA.getLocReg(), fmrrd));
1262 if (NextVA.isRegLoc())
1263 RegsToPass.push_back(std::make_pair(NextVA.getLocReg(), fmrrd.getValue(1)));
1265 assert(NextVA.isMemLoc());
1266 if (StackPtr.getNode() == 0)
1267 StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
1269 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, fmrrd.getValue(1),
1275 /// LowerCall - Lowering a call into a callseq_start <-
1276 /// ARMISD:CALL <- callseq_end chain. Also add input and output parameter
1279 ARMTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
1280 CallingConv::ID CallConv, bool isVarArg,
1282 const SmallVectorImpl<ISD::OutputArg> &Outs,
1283 const SmallVectorImpl<SDValue> &OutVals,
1284 const SmallVectorImpl<ISD::InputArg> &Ins,
1285 DebugLoc dl, SelectionDAG &DAG,
1286 SmallVectorImpl<SDValue> &InVals) const {
1287 MachineFunction &MF = DAG.getMachineFunction();
1288 bool IsStructRet = (Outs.empty()) ? false : Outs[0].Flags.isSRet();
1289 bool IsSibCall = false;
1290 // Disable tail calls if they're not supported.
1291 if (!EnableARMTailCalls && !Subtarget->supportsTailCall())
1294 // Check if it's really possible to do a tail call.
1295 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
1296 isVarArg, IsStructRet, MF.getFunction()->hasStructRetAttr(),
1297 Outs, OutVals, Ins, DAG);
1298 // We don't support GuaranteedTailCallOpt for ARM, only automatically
1299 // detected sibcalls.
1306 // Analyze operands of the call, assigning locations to each operand.
1307 SmallVector<CCValAssign, 16> ArgLocs;
1308 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1309 getTargetMachine(), ArgLocs, *DAG.getContext(), Call);
1310 CCInfo.AnalyzeCallOperands(Outs,
1311 CCAssignFnForNode(CallConv, /* Return*/ false,
1314 // Get a count of how many bytes are to be pushed on the stack.
1315 unsigned NumBytes = CCInfo.getNextStackOffset();
1317 // For tail calls, memory operands are available in our caller's stack.
1321 // Adjust the stack pointer for the new arguments...
1322 // These operations are automatically eliminated by the prolog/epilog pass
1324 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
1326 SDValue StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
1328 RegsToPassVector RegsToPass;
1329 SmallVector<SDValue, 8> MemOpChains;
1331 // Walk the register/memloc assignments, inserting copies/loads. In the case
1332 // of tail call optimization, arguments are handled later.
1333 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
1335 ++i, ++realArgIdx) {
1336 CCValAssign &VA = ArgLocs[i];
1337 SDValue Arg = OutVals[realArgIdx];
1338 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
1339 bool isByVal = Flags.isByVal();
1341 // Promote the value if needed.
1342 switch (VA.getLocInfo()) {
1343 default: llvm_unreachable("Unknown loc info!");
1344 case CCValAssign::Full: break;
1345 case CCValAssign::SExt:
1346 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
1348 case CCValAssign::ZExt:
1349 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
1351 case CCValAssign::AExt:
1352 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
1354 case CCValAssign::BCvt:
1355 Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg);
1359 // f64 and v2f64 might be passed in i32 pairs and must be split into pieces
1360 if (VA.needsCustom()) {
1361 if (VA.getLocVT() == MVT::v2f64) {
1362 SDValue Op0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1363 DAG.getConstant(0, MVT::i32));
1364 SDValue Op1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1365 DAG.getConstant(1, MVT::i32));
1367 PassF64ArgInRegs(dl, DAG, Chain, Op0, RegsToPass,
1368 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1370 VA = ArgLocs[++i]; // skip ahead to next loc
1371 if (VA.isRegLoc()) {
1372 PassF64ArgInRegs(dl, DAG, Chain, Op1, RegsToPass,
1373 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1375 assert(VA.isMemLoc());
1377 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Op1,
1378 dl, DAG, VA, Flags));
1381 PassF64ArgInRegs(dl, DAG, Chain, Arg, RegsToPass, VA, ArgLocs[++i],
1382 StackPtr, MemOpChains, Flags);
1384 } else if (VA.isRegLoc()) {
1385 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
1386 } else if (isByVal) {
1387 assert(VA.isMemLoc());
1388 unsigned offset = 0;
1390 // True if this byval aggregate will be split between registers
1392 if (CCInfo.isFirstByValRegValid()) {
1393 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1395 for (i = 0, j = CCInfo.getFirstByValReg(); j < ARM::R4; i++, j++) {
1396 SDValue Const = DAG.getConstant(4*i, MVT::i32);
1397 SDValue AddArg = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, Const);
1398 SDValue Load = DAG.getLoad(PtrVT, dl, Chain, AddArg,
1399 MachinePointerInfo(),
1400 false, false, false, 0);
1401 MemOpChains.push_back(Load.getValue(1));
1402 RegsToPass.push_back(std::make_pair(j, Load));
1404 offset = ARM::R4 - CCInfo.getFirstByValReg();
1405 CCInfo.clearFirstByValReg();
1408 unsigned LocMemOffset = VA.getLocMemOffset();
1409 SDValue StkPtrOff = DAG.getIntPtrConstant(LocMemOffset);
1410 SDValue Dst = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr,
1412 SDValue SrcOffset = DAG.getIntPtrConstant(4*offset);
1413 SDValue Src = DAG.getNode(ISD::ADD, dl, getPointerTy(), Arg, SrcOffset);
1414 SDValue SizeNode = DAG.getConstant(Flags.getByValSize() - 4*offset,
1416 MemOpChains.push_back(DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode,
1417 Flags.getByValAlign(),
1418 /*isVolatile=*/false,
1419 /*AlwaysInline=*/false,
1420 MachinePointerInfo(0),
1421 MachinePointerInfo(0)));
1423 } else if (!IsSibCall) {
1424 assert(VA.isMemLoc());
1426 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
1427 dl, DAG, VA, Flags));
1431 if (!MemOpChains.empty())
1432 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1433 &MemOpChains[0], MemOpChains.size());
1435 // Build a sequence of copy-to-reg nodes chained together with token chain
1436 // and flag operands which copy the outgoing args into the appropriate regs.
1438 // Tail call byval lowering might overwrite argument registers so in case of
1439 // tail call optimization the copies to registers are lowered later.
1441 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1442 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1443 RegsToPass[i].second, InFlag);
1444 InFlag = Chain.getValue(1);
1447 // For tail calls lower the arguments to the 'real' stack slot.
1449 // Force all the incoming stack arguments to be loaded from the stack
1450 // before any new outgoing arguments are stored to the stack, because the
1451 // outgoing stack slots may alias the incoming argument stack slots, and
1452 // the alias isn't otherwise explicit. This is slightly more conservative
1453 // than necessary, because it means that each store effectively depends
1454 // on every argument instead of just those arguments it would clobber.
1456 // Do not flag preceding copytoreg stuff together with the following stuff.
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);
1466 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
1467 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
1468 // node so that legalize doesn't hack it.
1469 bool isDirect = false;
1470 bool isARMFunc = false;
1471 bool isLocalARMFunc = false;
1472 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1474 if (EnableARMLongCalls) {
1475 assert (getTargetMachine().getRelocationModel() == Reloc::Static
1476 && "long-calls with non-static relocation model!");
1477 // Handle a global address or an external symbol. If it's not one of
1478 // those, the target's already in a register, so we don't need to do
1480 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1481 const GlobalValue *GV = G->getGlobal();
1482 // Create a constant pool entry for the callee address
1483 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1484 ARMConstantPoolValue *CPV =
1485 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue, 0);
1487 // Get the address of the callee into a register
1488 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1489 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1490 Callee = DAG.getLoad(getPointerTy(), dl,
1491 DAG.getEntryNode(), CPAddr,
1492 MachinePointerInfo::getConstantPool(),
1493 false, false, false, 0);
1494 } else if (ExternalSymbolSDNode *S=dyn_cast<ExternalSymbolSDNode>(Callee)) {
1495 const char *Sym = S->getSymbol();
1497 // Create a constant pool entry for the callee address
1498 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1499 ARMConstantPoolValue *CPV =
1500 ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym,
1501 ARMPCLabelIndex, 0);
1502 // Get the address of the callee into a register
1503 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1504 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1505 Callee = DAG.getLoad(getPointerTy(), dl,
1506 DAG.getEntryNode(), CPAddr,
1507 MachinePointerInfo::getConstantPool(),
1508 false, false, false, 0);
1510 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1511 const GlobalValue *GV = G->getGlobal();
1513 bool isExt = GV->isDeclaration() || GV->isWeakForLinker();
1514 bool isStub = (isExt && Subtarget->isTargetDarwin()) &&
1515 getTargetMachine().getRelocationModel() != Reloc::Static;
1516 isARMFunc = !Subtarget->isThumb() || isStub;
1517 // ARM call to a local ARM function is predicable.
1518 isLocalARMFunc = !Subtarget->isThumb() && (!isExt || !ARMInterworking);
1519 // tBX takes a register source operand.
1520 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1521 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1522 ARMConstantPoolValue *CPV =
1523 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue, 4);
1524 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1525 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1526 Callee = DAG.getLoad(getPointerTy(), dl,
1527 DAG.getEntryNode(), CPAddr,
1528 MachinePointerInfo::getConstantPool(),
1529 false, false, false, 0);
1530 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1531 Callee = DAG.getNode(ARMISD::PIC_ADD, dl,
1532 getPointerTy(), Callee, PICLabel);
1534 // On ELF targets for PIC code, direct calls should go through the PLT
1535 unsigned OpFlags = 0;
1536 if (Subtarget->isTargetELF() &&
1537 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1538 OpFlags = ARMII::MO_PLT;
1539 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
1541 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
1543 bool isStub = Subtarget->isTargetDarwin() &&
1544 getTargetMachine().getRelocationModel() != Reloc::Static;
1545 isARMFunc = !Subtarget->isThumb() || isStub;
1546 // tBX takes a register source operand.
1547 const char *Sym = S->getSymbol();
1548 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1549 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1550 ARMConstantPoolValue *CPV =
1551 ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym,
1552 ARMPCLabelIndex, 4);
1553 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1554 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1555 Callee = DAG.getLoad(getPointerTy(), dl,
1556 DAG.getEntryNode(), CPAddr,
1557 MachinePointerInfo::getConstantPool(),
1558 false, false, false, 0);
1559 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1560 Callee = DAG.getNode(ARMISD::PIC_ADD, dl,
1561 getPointerTy(), Callee, PICLabel);
1563 unsigned OpFlags = 0;
1564 // On ELF targets for PIC code, direct calls should go through the PLT
1565 if (Subtarget->isTargetELF() &&
1566 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1567 OpFlags = ARMII::MO_PLT;
1568 Callee = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlags);
1572 // FIXME: handle tail calls differently.
1574 if (Subtarget->isThumb()) {
1575 if ((!isDirect || isARMFunc) && !Subtarget->hasV5TOps())
1576 CallOpc = ARMISD::CALL_NOLINK;
1578 CallOpc = isARMFunc ? ARMISD::CALL : ARMISD::tCALL;
1580 CallOpc = (isDirect || Subtarget->hasV5TOps())
1581 ? (isLocalARMFunc ? ARMISD::CALL_PRED : ARMISD::CALL)
1582 : ARMISD::CALL_NOLINK;
1585 std::vector<SDValue> Ops;
1586 Ops.push_back(Chain);
1587 Ops.push_back(Callee);
1589 // Add argument registers to the end of the list so that they are known live
1591 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
1592 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
1593 RegsToPass[i].second.getValueType()));
1595 if (InFlag.getNode())
1596 Ops.push_back(InFlag);
1598 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
1600 return DAG.getNode(ARMISD::TC_RETURN, dl, NodeTys, &Ops[0], Ops.size());
1602 // Returns a chain and a flag for retval copy to use.
1603 Chain = DAG.getNode(CallOpc, dl, NodeTys, &Ops[0], Ops.size());
1604 InFlag = Chain.getValue(1);
1606 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
1607 DAG.getIntPtrConstant(0, true), InFlag);
1609 InFlag = Chain.getValue(1);
1611 // Handle result values, copying them out of physregs into vregs that we
1613 return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins,
1617 /// HandleByVal - Every parameter *after* a byval parameter is passed
1618 /// on the stack. Remember the next parameter register to allocate,
1619 /// and then confiscate the rest of the parameter registers to insure
1622 llvm::ARMTargetLowering::HandleByVal(CCState *State, unsigned &size) const {
1623 unsigned reg = State->AllocateReg(GPRArgRegs, 4);
1624 assert((State->getCallOrPrologue() == Prologue ||
1625 State->getCallOrPrologue() == Call) &&
1626 "unhandled ParmContext");
1627 if ((!State->isFirstByValRegValid()) &&
1628 (ARM::R0 <= reg) && (reg <= ARM::R3)) {
1629 State->setFirstByValReg(reg);
1630 // At a call site, a byval parameter that is split between
1631 // registers and memory needs its size truncated here. In a
1632 // function prologue, such byval parameters are reassembled in
1633 // memory, and are not truncated.
1634 if (State->getCallOrPrologue() == Call) {
1635 unsigned excess = 4 * (ARM::R4 - reg);
1636 assert(size >= excess && "expected larger existing stack allocation");
1640 // Confiscate any remaining parameter registers to preclude their
1641 // assignment to subsequent parameters.
1642 while (State->AllocateReg(GPRArgRegs, 4))
1646 /// MatchingStackOffset - Return true if the given stack call argument is
1647 /// already available in the same position (relatively) of the caller's
1648 /// incoming argument stack.
1650 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
1651 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
1652 const ARMInstrInfo *TII) {
1653 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
1655 if (Arg.getOpcode() == ISD::CopyFromReg) {
1656 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
1657 if (!TargetRegisterInfo::isVirtualRegister(VR))
1659 MachineInstr *Def = MRI->getVRegDef(VR);
1662 if (!Flags.isByVal()) {
1663 if (!TII->isLoadFromStackSlot(Def, FI))
1668 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
1669 if (Flags.isByVal())
1670 // ByVal argument is passed in as a pointer but it's now being
1671 // dereferenced. e.g.
1672 // define @foo(%struct.X* %A) {
1673 // tail call @bar(%struct.X* byval %A)
1676 SDValue Ptr = Ld->getBasePtr();
1677 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
1680 FI = FINode->getIndex();
1684 assert(FI != INT_MAX);
1685 if (!MFI->isFixedObjectIndex(FI))
1687 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
1690 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
1691 /// for tail call optimization. Targets which want to do tail call
1692 /// optimization should implement this function.
1694 ARMTargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
1695 CallingConv::ID CalleeCC,
1697 bool isCalleeStructRet,
1698 bool isCallerStructRet,
1699 const SmallVectorImpl<ISD::OutputArg> &Outs,
1700 const SmallVectorImpl<SDValue> &OutVals,
1701 const SmallVectorImpl<ISD::InputArg> &Ins,
1702 SelectionDAG& DAG) const {
1703 const Function *CallerF = DAG.getMachineFunction().getFunction();
1704 CallingConv::ID CallerCC = CallerF->getCallingConv();
1705 bool CCMatch = CallerCC == CalleeCC;
1707 // Look for obvious safe cases to perform tail call optimization that do not
1708 // require ABI changes. This is what gcc calls sibcall.
1710 // Do not sibcall optimize vararg calls unless the call site is not passing
1712 if (isVarArg && !Outs.empty())
1715 // Also avoid sibcall optimization if either caller or callee uses struct
1716 // return semantics.
1717 if (isCalleeStructRet || isCallerStructRet)
1720 // FIXME: Completely disable sibcall for Thumb1 since Thumb1RegisterInfo::
1721 // emitEpilogue is not ready for them. Thumb tail calls also use t2B, as
1722 // the Thumb1 16-bit unconditional branch doesn't have sufficient relocation
1723 // support in the assembler and linker to be used. This would need to be
1724 // fixed to fully support tail calls in Thumb1.
1726 // Doing this is tricky, since the LDM/POP instruction on Thumb doesn't take
1727 // LR. This means if we need to reload LR, it takes an extra instructions,
1728 // which outweighs the value of the tail call; but here we don't know yet
1729 // whether LR is going to be used. Probably the right approach is to
1730 // generate the tail call here and turn it back into CALL/RET in
1731 // emitEpilogue if LR is used.
1733 // Thumb1 PIC calls to external symbols use BX, so they can be tail calls,
1734 // but we need to make sure there are enough registers; the only valid
1735 // registers are the 4 used for parameters. We don't currently do this
1737 if (Subtarget->isThumb1Only())
1740 // If the calling conventions do not match, then we'd better make sure the
1741 // results are returned in the same way as what the caller expects.
1743 SmallVector<CCValAssign, 16> RVLocs1;
1744 ARMCCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(),
1745 getTargetMachine(), RVLocs1, *DAG.getContext(), Call);
1746 CCInfo1.AnalyzeCallResult(Ins, CCAssignFnForNode(CalleeCC, true, isVarArg));
1748 SmallVector<CCValAssign, 16> RVLocs2;
1749 ARMCCState CCInfo2(CallerCC, false, DAG.getMachineFunction(),
1750 getTargetMachine(), RVLocs2, *DAG.getContext(), Call);
1751 CCInfo2.AnalyzeCallResult(Ins, CCAssignFnForNode(CallerCC, true, isVarArg));
1753 if (RVLocs1.size() != RVLocs2.size())
1755 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
1756 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
1758 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
1760 if (RVLocs1[i].isRegLoc()) {
1761 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
1764 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
1770 // If the callee takes no arguments then go on to check the results of the
1772 if (!Outs.empty()) {
1773 // Check if stack adjustment is needed. For now, do not do this if any
1774 // argument is passed on the stack.
1775 SmallVector<CCValAssign, 16> ArgLocs;
1776 ARMCCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
1777 getTargetMachine(), ArgLocs, *DAG.getContext(), Call);
1778 CCInfo.AnalyzeCallOperands(Outs,
1779 CCAssignFnForNode(CalleeCC, false, isVarArg));
1780 if (CCInfo.getNextStackOffset()) {
1781 MachineFunction &MF = DAG.getMachineFunction();
1783 // Check if the arguments are already laid out in the right way as
1784 // the caller's fixed stack objects.
1785 MachineFrameInfo *MFI = MF.getFrameInfo();
1786 const MachineRegisterInfo *MRI = &MF.getRegInfo();
1787 const ARMInstrInfo *TII =
1788 ((ARMTargetMachine&)getTargetMachine()).getInstrInfo();
1789 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
1791 ++i, ++realArgIdx) {
1792 CCValAssign &VA = ArgLocs[i];
1793 EVT RegVT = VA.getLocVT();
1794 SDValue Arg = OutVals[realArgIdx];
1795 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
1796 if (VA.getLocInfo() == CCValAssign::Indirect)
1798 if (VA.needsCustom()) {
1799 // f64 and vector types are split into multiple registers or
1800 // register/stack-slot combinations. The types will not match
1801 // the registers; give up on memory f64 refs until we figure
1802 // out what to do about this.
1805 if (!ArgLocs[++i].isRegLoc())
1807 if (RegVT == MVT::v2f64) {
1808 if (!ArgLocs[++i].isRegLoc())
1810 if (!ArgLocs[++i].isRegLoc())
1813 } else if (!VA.isRegLoc()) {
1814 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
1826 ARMTargetLowering::LowerReturn(SDValue Chain,
1827 CallingConv::ID CallConv, bool isVarArg,
1828 const SmallVectorImpl<ISD::OutputArg> &Outs,
1829 const SmallVectorImpl<SDValue> &OutVals,
1830 DebugLoc dl, SelectionDAG &DAG) const {
1832 // CCValAssign - represent the assignment of the return value to a location.
1833 SmallVector<CCValAssign, 16> RVLocs;
1835 // CCState - Info about the registers and stack slots.
1836 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1837 getTargetMachine(), RVLocs, *DAG.getContext(), Call);
1839 // Analyze outgoing return values.
1840 CCInfo.AnalyzeReturn(Outs, CCAssignFnForNode(CallConv, /* Return */ true,
1843 // If this is the first return lowered for this function, add
1844 // the regs to the liveout set for the function.
1845 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
1846 for (unsigned i = 0; i != RVLocs.size(); ++i)
1847 if (RVLocs[i].isRegLoc())
1848 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
1853 // Copy the result values into the output registers.
1854 for (unsigned i = 0, realRVLocIdx = 0;
1856 ++i, ++realRVLocIdx) {
1857 CCValAssign &VA = RVLocs[i];
1858 assert(VA.isRegLoc() && "Can only return in registers!");
1860 SDValue Arg = OutVals[realRVLocIdx];
1862 switch (VA.getLocInfo()) {
1863 default: llvm_unreachable("Unknown loc info!");
1864 case CCValAssign::Full: break;
1865 case CCValAssign::BCvt:
1866 Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg);
1870 if (VA.needsCustom()) {
1871 if (VA.getLocVT() == MVT::v2f64) {
1872 // Extract the first half and return it in two registers.
1873 SDValue Half = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1874 DAG.getConstant(0, MVT::i32));
1875 SDValue HalfGPRs = DAG.getNode(ARMISD::VMOVRRD, dl,
1876 DAG.getVTList(MVT::i32, MVT::i32), Half);
1878 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), HalfGPRs, Flag);
1879 Flag = Chain.getValue(1);
1880 VA = RVLocs[++i]; // skip ahead to next loc
1881 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
1882 HalfGPRs.getValue(1), Flag);
1883 Flag = Chain.getValue(1);
1884 VA = RVLocs[++i]; // skip ahead to next loc
1886 // Extract the 2nd half and fall through to handle it as an f64 value.
1887 Arg = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1888 DAG.getConstant(1, MVT::i32));
1890 // Legalize ret f64 -> ret 2 x i32. We always have fmrrd if f64 is
1892 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
1893 DAG.getVTList(MVT::i32, MVT::i32), &Arg, 1);
1894 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), fmrrd, Flag);
1895 Flag = Chain.getValue(1);
1896 VA = RVLocs[++i]; // skip ahead to next loc
1897 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), fmrrd.getValue(1),
1900 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), Arg, Flag);
1902 // Guarantee that all emitted copies are
1903 // stuck together, avoiding something bad.
1904 Flag = Chain.getValue(1);
1909 result = DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, Chain, Flag);
1911 result = DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, Chain);
1916 bool ARMTargetLowering::isUsedByReturnOnly(SDNode *N) const {
1917 if (N->getNumValues() != 1)
1919 if (!N->hasNUsesOfValue(1, 0))
1922 unsigned NumCopies = 0;
1923 SDNode* Copies[2] = { 0, 0 };
1924 SDNode *Use = *N->use_begin();
1925 if (Use->getOpcode() == ISD::CopyToReg) {
1926 Copies[NumCopies++] = Use;
1927 } else if (Use->getOpcode() == ARMISD::VMOVRRD) {
1928 // f64 returned in a pair of GPRs.
1929 for (SDNode::use_iterator UI = Use->use_begin(), UE = Use->use_end();
1931 if (UI->getOpcode() != ISD::CopyToReg)
1933 Copies[UI.getUse().getResNo()] = *UI;
1936 } else if (Use->getOpcode() == ISD::BITCAST) {
1937 // f32 returned in a single GPR.
1938 if (!Use->hasNUsesOfValue(1, 0))
1940 Use = *Use->use_begin();
1941 if (Use->getOpcode() != ISD::CopyToReg || !Use->hasNUsesOfValue(1, 0))
1943 Copies[NumCopies++] = Use;
1948 if (NumCopies != 1 && NumCopies != 2)
1951 bool HasRet = false;
1952 for (unsigned i = 0; i < NumCopies; ++i) {
1953 SDNode *Copy = Copies[i];
1954 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
1956 if (UI->getOpcode() == ISD::CopyToReg) {
1958 if (Use == Copies[0] || ((NumCopies == 2) && (Use == Copies[1])))
1962 if (UI->getOpcode() != ARMISD::RET_FLAG)
1971 bool ARMTargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
1972 if (!EnableARMTailCalls)
1975 if (!CI->isTailCall())
1978 return !Subtarget->isThumb1Only();
1981 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
1982 // their target counterpart wrapped in the ARMISD::Wrapper node. Suppose N is
1983 // one of the above mentioned nodes. It has to be wrapped because otherwise
1984 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
1985 // be used to form addressing mode. These wrapped nodes will be selected
1987 static SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) {
1988 EVT PtrVT = Op.getValueType();
1989 // FIXME there is no actual debug info here
1990 DebugLoc dl = Op.getDebugLoc();
1991 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
1993 if (CP->isMachineConstantPoolEntry())
1994 Res = DAG.getTargetConstantPool(CP->getMachineCPVal(), PtrVT,
1995 CP->getAlignment());
1997 Res = DAG.getTargetConstantPool(CP->getConstVal(), PtrVT,
1998 CP->getAlignment());
1999 return DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Res);
2002 unsigned ARMTargetLowering::getJumpTableEncoding() const {
2003 return MachineJumpTableInfo::EK_Inline;
2006 SDValue ARMTargetLowering::LowerBlockAddress(SDValue Op,
2007 SelectionDAG &DAG) const {
2008 MachineFunction &MF = DAG.getMachineFunction();
2009 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2010 unsigned ARMPCLabelIndex = 0;
2011 DebugLoc DL = Op.getDebugLoc();
2012 EVT PtrVT = getPointerTy();
2013 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
2014 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2016 if (RelocM == Reloc::Static) {
2017 CPAddr = DAG.getTargetConstantPool(BA, PtrVT, 4);
2019 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
2020 ARMPCLabelIndex = AFI->createPICLabelUId();
2021 ARMConstantPoolValue *CPV =
2022 ARMConstantPoolConstant::Create(BA, ARMPCLabelIndex,
2023 ARMCP::CPBlockAddress, PCAdj);
2024 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2026 CPAddr = DAG.getNode(ARMISD::Wrapper, DL, PtrVT, CPAddr);
2027 SDValue Result = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), CPAddr,
2028 MachinePointerInfo::getConstantPool(),
2029 false, false, false, 0);
2030 if (RelocM == Reloc::Static)
2032 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2033 return DAG.getNode(ARMISD::PIC_ADD, DL, PtrVT, Result, PICLabel);
2036 // Lower ISD::GlobalTLSAddress using the "general dynamic" model
2038 ARMTargetLowering::LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA,
2039 SelectionDAG &DAG) const {
2040 DebugLoc dl = GA->getDebugLoc();
2041 EVT PtrVT = getPointerTy();
2042 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
2043 MachineFunction &MF = DAG.getMachineFunction();
2044 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2045 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2046 ARMConstantPoolValue *CPV =
2047 ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex,
2048 ARMCP::CPValue, PCAdj, ARMCP::TLSGD, true);
2049 SDValue Argument = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2050 Argument = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Argument);
2051 Argument = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Argument,
2052 MachinePointerInfo::getConstantPool(),
2053 false, false, false, 0);
2054 SDValue Chain = Argument.getValue(1);
2056 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2057 Argument = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Argument, PICLabel);
2059 // call __tls_get_addr.
2062 Entry.Node = Argument;
2063 Entry.Ty = (Type *) Type::getInt32Ty(*DAG.getContext());
2064 Args.push_back(Entry);
2065 // FIXME: is there useful debug info available here?
2066 std::pair<SDValue, SDValue> CallResult =
2067 LowerCallTo(Chain, (Type *) Type::getInt32Ty(*DAG.getContext()),
2068 false, false, false, false,
2069 0, CallingConv::C, false, /*isReturnValueUsed=*/true,
2070 DAG.getExternalSymbol("__tls_get_addr", PtrVT), Args, DAG, dl);
2071 return CallResult.first;
2074 // Lower ISD::GlobalTLSAddress using the "initial exec" or
2075 // "local exec" model.
2077 ARMTargetLowering::LowerToTLSExecModels(GlobalAddressSDNode *GA,
2078 SelectionDAG &DAG) const {
2079 const GlobalValue *GV = GA->getGlobal();
2080 DebugLoc dl = GA->getDebugLoc();
2082 SDValue Chain = DAG.getEntryNode();
2083 EVT PtrVT = getPointerTy();
2084 // Get the Thread Pointer
2085 SDValue ThreadPointer = DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
2087 if (GV->isDeclaration()) {
2088 MachineFunction &MF = DAG.getMachineFunction();
2089 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2090 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2091 // Initial exec model.
2092 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
2093 ARMConstantPoolValue *CPV =
2094 ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex,
2095 ARMCP::CPValue, PCAdj, ARMCP::GOTTPOFF,
2097 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2098 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
2099 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2100 MachinePointerInfo::getConstantPool(),
2101 false, false, false, 0);
2102 Chain = Offset.getValue(1);
2104 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2105 Offset = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Offset, PICLabel);
2107 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2108 MachinePointerInfo::getConstantPool(),
2109 false, false, false, 0);
2112 ARMConstantPoolValue *CPV =
2113 ARMConstantPoolConstant::Create(GV, ARMCP::TPOFF);
2114 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2115 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
2116 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2117 MachinePointerInfo::getConstantPool(),
2118 false, false, false, 0);
2121 // The address of the thread local variable is the add of the thread
2122 // pointer with the offset of the variable.
2123 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
2127 ARMTargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
2128 // TODO: implement the "local dynamic" model
2129 assert(Subtarget->isTargetELF() &&
2130 "TLS not implemented for non-ELF targets");
2131 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
2132 // If the relocation model is PIC, use the "General Dynamic" TLS Model,
2133 // otherwise use the "Local Exec" TLS Model
2134 if (getTargetMachine().getRelocationModel() == Reloc::PIC_)
2135 return LowerToTLSGeneralDynamicModel(GA, DAG);
2137 return LowerToTLSExecModels(GA, DAG);
2140 SDValue ARMTargetLowering::LowerGlobalAddressELF(SDValue Op,
2141 SelectionDAG &DAG) const {
2142 EVT PtrVT = getPointerTy();
2143 DebugLoc dl = Op.getDebugLoc();
2144 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2145 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2146 if (RelocM == Reloc::PIC_) {
2147 bool UseGOTOFF = GV->hasLocalLinkage() || GV->hasHiddenVisibility();
2148 ARMConstantPoolValue *CPV =
2149 ARMConstantPoolConstant::Create(GV,
2150 UseGOTOFF ? ARMCP::GOTOFF : ARMCP::GOT);
2151 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2152 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2153 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
2155 MachinePointerInfo::getConstantPool(),
2156 false, false, false, 0);
2157 SDValue Chain = Result.getValue(1);
2158 SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(PtrVT);
2159 Result = DAG.getNode(ISD::ADD, dl, PtrVT, Result, GOT);
2161 Result = DAG.getLoad(PtrVT, dl, Chain, Result,
2162 MachinePointerInfo::getGOT(),
2163 false, false, false, 0);
2167 // If we have T2 ops, we can materialize the address directly via movt/movw
2168 // pair. This is always cheaper.
2169 if (Subtarget->useMovt()) {
2171 // FIXME: Once remat is capable of dealing with instructions with register
2172 // operands, expand this into two nodes.
2173 return DAG.getNode(ARMISD::Wrapper, dl, PtrVT,
2174 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2176 SDValue CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
2177 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2178 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2179 MachinePointerInfo::getConstantPool(),
2180 false, false, false, 0);
2184 SDValue ARMTargetLowering::LowerGlobalAddressDarwin(SDValue Op,
2185 SelectionDAG &DAG) const {
2186 EVT PtrVT = getPointerTy();
2187 DebugLoc dl = Op.getDebugLoc();
2188 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2189 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2190 MachineFunction &MF = DAG.getMachineFunction();
2191 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2193 // FIXME: Enable this for static codegen when tool issues are fixed. Also
2194 // update ARMFastISel::ARMMaterializeGV.
2195 if (Subtarget->useMovt() && RelocM != Reloc::Static) {
2197 // FIXME: Once remat is capable of dealing with instructions with register
2198 // operands, expand this into two nodes.
2199 if (RelocM == Reloc::Static)
2200 return DAG.getNode(ARMISD::Wrapper, dl, PtrVT,
2201 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2203 unsigned Wrapper = (RelocM == Reloc::PIC_)
2204 ? ARMISD::WrapperPIC : ARMISD::WrapperDYN;
2205 SDValue Result = DAG.getNode(Wrapper, dl, PtrVT,
2206 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2207 if (Subtarget->GVIsIndirectSymbol(GV, RelocM))
2208 Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Result,
2209 MachinePointerInfo::getGOT(),
2210 false, false, false, 0);
2214 unsigned ARMPCLabelIndex = 0;
2216 if (RelocM == Reloc::Static) {
2217 CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
2219 ARMPCLabelIndex = AFI->createPICLabelUId();
2220 unsigned PCAdj = (RelocM != Reloc::PIC_) ? 0 : (Subtarget->isThumb()?4:8);
2221 ARMConstantPoolValue *CPV =
2222 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue,
2224 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2226 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2228 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2229 MachinePointerInfo::getConstantPool(),
2230 false, false, false, 0);
2231 SDValue Chain = Result.getValue(1);
2233 if (RelocM == Reloc::PIC_) {
2234 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2235 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2238 if (Subtarget->GVIsIndirectSymbol(GV, RelocM))
2239 Result = DAG.getLoad(PtrVT, dl, Chain, Result, MachinePointerInfo::getGOT(),
2240 false, false, false, 0);
2245 SDValue ARMTargetLowering::LowerGLOBAL_OFFSET_TABLE(SDValue Op,
2246 SelectionDAG &DAG) const {
2247 assert(Subtarget->isTargetELF() &&
2248 "GLOBAL OFFSET TABLE not implemented for non-ELF targets");
2249 MachineFunction &MF = DAG.getMachineFunction();
2250 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2251 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2252 EVT PtrVT = getPointerTy();
2253 DebugLoc dl = Op.getDebugLoc();
2254 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
2255 ARMConstantPoolValue *CPV =
2256 ARMConstantPoolSymbol::Create(*DAG.getContext(), "_GLOBAL_OFFSET_TABLE_",
2257 ARMPCLabelIndex, PCAdj);
2258 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2259 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2260 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2261 MachinePointerInfo::getConstantPool(),
2262 false, false, false, 0);
2263 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2264 return DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2268 ARMTargetLowering::LowerEH_SJLJ_SETJMP(SDValue Op, SelectionDAG &DAG) const {
2269 DebugLoc dl = Op.getDebugLoc();
2270 SDValue Val = DAG.getConstant(0, MVT::i32);
2271 return DAG.getNode(ARMISD::EH_SJLJ_SETJMP, dl,
2272 DAG.getVTList(MVT::i32, MVT::Other), Op.getOperand(0),
2273 Op.getOperand(1), Val);
2277 ARMTargetLowering::LowerEH_SJLJ_LONGJMP(SDValue Op, SelectionDAG &DAG) const {
2278 DebugLoc dl = Op.getDebugLoc();
2279 return DAG.getNode(ARMISD::EH_SJLJ_LONGJMP, dl, MVT::Other, Op.getOperand(0),
2280 Op.getOperand(1), DAG.getConstant(0, MVT::i32));
2284 ARMTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG,
2285 const ARMSubtarget *Subtarget) const {
2286 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
2287 DebugLoc dl = Op.getDebugLoc();
2289 default: return SDValue(); // Don't custom lower most intrinsics.
2290 case Intrinsic::arm_thread_pointer: {
2291 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2292 return DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
2294 case Intrinsic::eh_sjlj_lsda: {
2295 MachineFunction &MF = DAG.getMachineFunction();
2296 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2297 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2298 EVT PtrVT = getPointerTy();
2299 DebugLoc dl = Op.getDebugLoc();
2300 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2302 unsigned PCAdj = (RelocM != Reloc::PIC_)
2303 ? 0 : (Subtarget->isThumb() ? 4 : 8);
2304 ARMConstantPoolValue *CPV =
2305 ARMConstantPoolConstant::Create(MF.getFunction(), ARMPCLabelIndex,
2306 ARMCP::CPLSDA, PCAdj);
2307 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2308 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2310 DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2311 MachinePointerInfo::getConstantPool(),
2312 false, false, false, 0);
2314 if (RelocM == Reloc::PIC_) {
2315 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2316 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2320 case Intrinsic::arm_neon_vmulls:
2321 case Intrinsic::arm_neon_vmullu: {
2322 unsigned NewOpc = (IntNo == Intrinsic::arm_neon_vmulls)
2323 ? ARMISD::VMULLs : ARMISD::VMULLu;
2324 return DAG.getNode(NewOpc, Op.getDebugLoc(), Op.getValueType(),
2325 Op.getOperand(1), Op.getOperand(2));
2330 static SDValue LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG,
2331 const ARMSubtarget *Subtarget) {
2332 DebugLoc dl = Op.getDebugLoc();
2333 if (!Subtarget->hasDataBarrier()) {
2334 // Some ARMv6 cpus can support data barriers with an mcr instruction.
2335 // Thumb1 and pre-v6 ARM mode use a libcall instead and should never get
2337 assert(Subtarget->hasV6Ops() && !Subtarget->isThumb() &&
2338 "Unexpected ISD::MEMBARRIER encountered. Should be libcall!");
2339 return DAG.getNode(ARMISD::MEMBARRIER_MCR, dl, MVT::Other, Op.getOperand(0),
2340 DAG.getConstant(0, MVT::i32));
2343 SDValue Op5 = Op.getOperand(5);
2344 bool isDeviceBarrier = cast<ConstantSDNode>(Op5)->getZExtValue() != 0;
2345 unsigned isLL = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
2346 unsigned isLS = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
2347 bool isOnlyStoreBarrier = (isLL == 0 && isLS == 0);
2349 ARM_MB::MemBOpt DMBOpt;
2350 if (isDeviceBarrier)
2351 DMBOpt = isOnlyStoreBarrier ? ARM_MB::ST : ARM_MB::SY;
2353 DMBOpt = isOnlyStoreBarrier ? ARM_MB::ISHST : ARM_MB::ISH;
2354 return DAG.getNode(ARMISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0),
2355 DAG.getConstant(DMBOpt, MVT::i32));
2359 static SDValue LowerATOMIC_FENCE(SDValue Op, SelectionDAG &DAG,
2360 const ARMSubtarget *Subtarget) {
2361 // FIXME: handle "fence singlethread" more efficiently.
2362 DebugLoc dl = Op.getDebugLoc();
2363 if (!Subtarget->hasDataBarrier()) {
2364 // Some ARMv6 cpus can support data barriers with an mcr instruction.
2365 // Thumb1 and pre-v6 ARM mode use a libcall instead and should never get
2367 assert(Subtarget->hasV6Ops() && !Subtarget->isThumb() &&
2368 "Unexpected ISD::MEMBARRIER encountered. Should be libcall!");
2369 return DAG.getNode(ARMISD::MEMBARRIER_MCR, dl, MVT::Other, Op.getOperand(0),
2370 DAG.getConstant(0, MVT::i32));
2373 return DAG.getNode(ARMISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0),
2374 DAG.getConstant(ARM_MB::ISH, MVT::i32));
2377 static SDValue LowerPREFETCH(SDValue Op, SelectionDAG &DAG,
2378 const ARMSubtarget *Subtarget) {
2379 // ARM pre v5TE and Thumb1 does not have preload instructions.
2380 if (!(Subtarget->isThumb2() ||
2381 (!Subtarget->isThumb1Only() && Subtarget->hasV5TEOps())))
2382 // Just preserve the chain.
2383 return Op.getOperand(0);
2385 DebugLoc dl = Op.getDebugLoc();
2386 unsigned isRead = ~cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue() & 1;
2388 (!Subtarget->hasV7Ops() || !Subtarget->hasMPExtension()))
2389 // ARMv7 with MP extension has PLDW.
2390 return Op.getOperand(0);
2392 unsigned isData = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
2393 if (Subtarget->isThumb()) {
2395 isRead = ~isRead & 1;
2396 isData = ~isData & 1;
2399 return DAG.getNode(ARMISD::PRELOAD, dl, MVT::Other, Op.getOperand(0),
2400 Op.getOperand(1), DAG.getConstant(isRead, MVT::i32),
2401 DAG.getConstant(isData, MVT::i32));
2404 static SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) {
2405 MachineFunction &MF = DAG.getMachineFunction();
2406 ARMFunctionInfo *FuncInfo = MF.getInfo<ARMFunctionInfo>();
2408 // vastart just stores the address of the VarArgsFrameIndex slot into the
2409 // memory location argument.
2410 DebugLoc dl = Op.getDebugLoc();
2411 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2412 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
2413 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
2414 return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1),
2415 MachinePointerInfo(SV), false, false, 0);
2419 ARMTargetLowering::GetF64FormalArgument(CCValAssign &VA, CCValAssign &NextVA,
2420 SDValue &Root, SelectionDAG &DAG,
2421 DebugLoc dl) const {
2422 MachineFunction &MF = DAG.getMachineFunction();
2423 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2425 const TargetRegisterClass *RC;
2426 if (AFI->isThumb1OnlyFunction())
2427 RC = ARM::tGPRRegisterClass;
2429 RC = ARM::GPRRegisterClass;
2431 // Transform the arguments stored in physical registers into virtual ones.
2432 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2433 SDValue ArgValue = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2436 if (NextVA.isMemLoc()) {
2437 MachineFrameInfo *MFI = MF.getFrameInfo();
2438 int FI = MFI->CreateFixedObject(4, NextVA.getLocMemOffset(), true);
2440 // Create load node to retrieve arguments from the stack.
2441 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2442 ArgValue2 = DAG.getLoad(MVT::i32, dl, Root, FIN,
2443 MachinePointerInfo::getFixedStack(FI),
2444 false, false, false, 0);
2446 Reg = MF.addLiveIn(NextVA.getLocReg(), RC);
2447 ArgValue2 = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2450 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, ArgValue, ArgValue2);
2454 ARMTargetLowering::computeRegArea(CCState &CCInfo, MachineFunction &MF,
2455 unsigned &VARegSize, unsigned &VARegSaveSize)
2458 if (CCInfo.isFirstByValRegValid())
2459 NumGPRs = ARM::R4 - CCInfo.getFirstByValReg();
2461 unsigned int firstUnalloced;
2462 firstUnalloced = CCInfo.getFirstUnallocated(GPRArgRegs,
2463 sizeof(GPRArgRegs) /
2464 sizeof(GPRArgRegs[0]));
2465 NumGPRs = (firstUnalloced <= 3) ? (4 - firstUnalloced) : 0;
2468 unsigned Align = MF.getTarget().getFrameLowering()->getStackAlignment();
2469 VARegSize = NumGPRs * 4;
2470 VARegSaveSize = (VARegSize + Align - 1) & ~(Align - 1);
2473 // The remaining GPRs hold either the beginning of variable-argument
2474 // data, or the beginning of an aggregate passed by value (usuall
2475 // byval). Either way, we allocate stack slots adjacent to the data
2476 // provided by our caller, and store the unallocated registers there.
2477 // If this is a variadic function, the va_list pointer will begin with
2478 // these values; otherwise, this reassembles a (byval) structure that
2479 // was split between registers and memory.
2481 ARMTargetLowering::VarArgStyleRegisters(CCState &CCInfo, SelectionDAG &DAG,
2482 DebugLoc dl, SDValue &Chain,
2483 unsigned ArgOffset) const {
2484 MachineFunction &MF = DAG.getMachineFunction();
2485 MachineFrameInfo *MFI = MF.getFrameInfo();
2486 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2487 unsigned firstRegToSaveIndex;
2488 if (CCInfo.isFirstByValRegValid())
2489 firstRegToSaveIndex = CCInfo.getFirstByValReg() - ARM::R0;
2491 firstRegToSaveIndex = CCInfo.getFirstUnallocated
2492 (GPRArgRegs, sizeof(GPRArgRegs) / sizeof(GPRArgRegs[0]));
2495 unsigned VARegSize, VARegSaveSize;
2496 computeRegArea(CCInfo, MF, VARegSize, VARegSaveSize);
2497 if (VARegSaveSize) {
2498 // If this function is vararg, store any remaining integer argument regs
2499 // to their spots on the stack so that they may be loaded by deferencing
2500 // the result of va_next.
2501 AFI->setVarArgsRegSaveSize(VARegSaveSize);
2502 AFI->setVarArgsFrameIndex(MFI->CreateFixedObject(VARegSaveSize,
2503 ArgOffset + VARegSaveSize
2506 SDValue FIN = DAG.getFrameIndex(AFI->getVarArgsFrameIndex(),
2509 SmallVector<SDValue, 4> MemOps;
2510 for (; firstRegToSaveIndex < 4; ++firstRegToSaveIndex) {
2511 const TargetRegisterClass *RC;
2512 if (AFI->isThumb1OnlyFunction())
2513 RC = ARM::tGPRRegisterClass;
2515 RC = ARM::GPRRegisterClass;
2517 unsigned VReg = MF.addLiveIn(GPRArgRegs[firstRegToSaveIndex], RC);
2518 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
2520 DAG.getStore(Val.getValue(1), dl, Val, FIN,
2521 MachinePointerInfo::getFixedStack(AFI->getVarArgsFrameIndex()),
2523 MemOps.push_back(Store);
2524 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), FIN,
2525 DAG.getConstant(4, getPointerTy()));
2527 if (!MemOps.empty())
2528 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2529 &MemOps[0], MemOps.size());
2531 // This will point to the next argument passed via stack.
2532 AFI->setVarArgsFrameIndex(MFI->CreateFixedObject(4, ArgOffset, true));
2536 ARMTargetLowering::LowerFormalArguments(SDValue Chain,
2537 CallingConv::ID CallConv, bool isVarArg,
2538 const SmallVectorImpl<ISD::InputArg>
2540 DebugLoc dl, SelectionDAG &DAG,
2541 SmallVectorImpl<SDValue> &InVals)
2543 MachineFunction &MF = DAG.getMachineFunction();
2544 MachineFrameInfo *MFI = MF.getFrameInfo();
2546 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2548 // Assign locations to all of the incoming arguments.
2549 SmallVector<CCValAssign, 16> ArgLocs;
2550 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2551 getTargetMachine(), ArgLocs, *DAG.getContext(), Prologue);
2552 CCInfo.AnalyzeFormalArguments(Ins,
2553 CCAssignFnForNode(CallConv, /* Return*/ false,
2556 SmallVector<SDValue, 16> ArgValues;
2557 int lastInsIndex = -1;
2560 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2561 CCValAssign &VA = ArgLocs[i];
2563 // Arguments stored in registers.
2564 if (VA.isRegLoc()) {
2565 EVT RegVT = VA.getLocVT();
2567 if (VA.needsCustom()) {
2568 // f64 and vector types are split up into multiple registers or
2569 // combinations of registers and stack slots.
2570 if (VA.getLocVT() == MVT::v2f64) {
2571 SDValue ArgValue1 = GetF64FormalArgument(VA, ArgLocs[++i],
2573 VA = ArgLocs[++i]; // skip ahead to next loc
2575 if (VA.isMemLoc()) {
2576 int FI = MFI->CreateFixedObject(8, VA.getLocMemOffset(), true);
2577 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2578 ArgValue2 = DAG.getLoad(MVT::f64, dl, Chain, FIN,
2579 MachinePointerInfo::getFixedStack(FI),
2580 false, false, false, 0);
2582 ArgValue2 = GetF64FormalArgument(VA, ArgLocs[++i],
2585 ArgValue = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
2586 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
2587 ArgValue, ArgValue1, DAG.getIntPtrConstant(0));
2588 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
2589 ArgValue, ArgValue2, DAG.getIntPtrConstant(1));
2591 ArgValue = GetF64FormalArgument(VA, ArgLocs[++i], Chain, DAG, dl);
2594 const TargetRegisterClass *RC;
2596 if (RegVT == MVT::f32)
2597 RC = ARM::SPRRegisterClass;
2598 else if (RegVT == MVT::f64)
2599 RC = ARM::DPRRegisterClass;
2600 else if (RegVT == MVT::v2f64)
2601 RC = ARM::QPRRegisterClass;
2602 else if (RegVT == MVT::i32)
2603 RC = (AFI->isThumb1OnlyFunction() ?
2604 ARM::tGPRRegisterClass : ARM::GPRRegisterClass);
2606 llvm_unreachable("RegVT not supported by FORMAL_ARGUMENTS Lowering");
2608 // Transform the arguments in physical registers into virtual ones.
2609 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2610 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
2613 // If this is an 8 or 16-bit value, it is really passed promoted
2614 // to 32 bits. Insert an assert[sz]ext to capture this, then
2615 // truncate to the right size.
2616 switch (VA.getLocInfo()) {
2617 default: llvm_unreachable("Unknown loc info!");
2618 case CCValAssign::Full: break;
2619 case CCValAssign::BCvt:
2620 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
2622 case CCValAssign::SExt:
2623 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
2624 DAG.getValueType(VA.getValVT()));
2625 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
2627 case CCValAssign::ZExt:
2628 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
2629 DAG.getValueType(VA.getValVT()));
2630 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
2634 InVals.push_back(ArgValue);
2636 } else { // VA.isRegLoc()
2639 assert(VA.isMemLoc());
2640 assert(VA.getValVT() != MVT::i64 && "i64 should already be lowered");
2642 int index = ArgLocs[i].getValNo();
2644 // Some Ins[] entries become multiple ArgLoc[] entries.
2645 // Process them only once.
2646 if (index != lastInsIndex)
2648 ISD::ArgFlagsTy Flags = Ins[index].Flags;
2649 // FIXME: For now, all byval parameter objects are marked mutable.
2650 // This can be changed with more analysis.
2651 // In case of tail call optimization mark all arguments mutable.
2652 // Since they could be overwritten by lowering of arguments in case of
2654 if (Flags.isByVal()) {
2655 unsigned VARegSize, VARegSaveSize;
2656 computeRegArea(CCInfo, MF, VARegSize, VARegSaveSize);
2657 VarArgStyleRegisters(CCInfo, DAG, dl, Chain, 0);
2658 unsigned Bytes = Flags.getByValSize() - VARegSize;
2659 if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
2660 int FI = MFI->CreateFixedObject(Bytes,
2661 VA.getLocMemOffset(), false);
2662 InVals.push_back(DAG.getFrameIndex(FI, getPointerTy()));
2664 int FI = MFI->CreateFixedObject(VA.getLocVT().getSizeInBits()/8,
2665 VA.getLocMemOffset(), true);
2667 // Create load nodes to retrieve arguments from the stack.
2668 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2669 InVals.push_back(DAG.getLoad(VA.getValVT(), dl, Chain, FIN,
2670 MachinePointerInfo::getFixedStack(FI),
2671 false, false, false, 0));
2673 lastInsIndex = index;
2680 VarArgStyleRegisters(CCInfo, DAG, dl, Chain, CCInfo.getNextStackOffset());
2685 /// isFloatingPointZero - Return true if this is +0.0.
2686 static bool isFloatingPointZero(SDValue Op) {
2687 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op))
2688 return CFP->getValueAPF().isPosZero();
2689 else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) {
2690 // Maybe this has already been legalized into the constant pool?
2691 if (Op.getOperand(1).getOpcode() == ARMISD::Wrapper) {
2692 SDValue WrapperOp = Op.getOperand(1).getOperand(0);
2693 if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(WrapperOp))
2694 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal()))
2695 return CFP->getValueAPF().isPosZero();
2701 /// Returns appropriate ARM CMP (cmp) and corresponding condition code for
2702 /// the given operands.
2704 ARMTargetLowering::getARMCmp(SDValue LHS, SDValue RHS, ISD::CondCode CC,
2705 SDValue &ARMcc, SelectionDAG &DAG,
2706 DebugLoc dl) const {
2707 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS.getNode())) {
2708 unsigned C = RHSC->getZExtValue();
2709 if (!isLegalICmpImmediate(C)) {
2710 // Constant does not fit, try adjusting it by one?
2715 if (C != 0x80000000 && isLegalICmpImmediate(C-1)) {
2716 CC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGT;
2717 RHS = DAG.getConstant(C-1, MVT::i32);
2722 if (C != 0 && isLegalICmpImmediate(C-1)) {
2723 CC = (CC == ISD::SETULT) ? ISD::SETULE : ISD::SETUGT;
2724 RHS = DAG.getConstant(C-1, MVT::i32);
2729 if (C != 0x7fffffff && isLegalICmpImmediate(C+1)) {
2730 CC = (CC == ISD::SETLE) ? ISD::SETLT : ISD::SETGE;
2731 RHS = DAG.getConstant(C+1, MVT::i32);
2736 if (C != 0xffffffff && isLegalICmpImmediate(C+1)) {
2737 CC = (CC == ISD::SETULE) ? ISD::SETULT : ISD::SETUGE;
2738 RHS = DAG.getConstant(C+1, MVT::i32);
2745 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
2746 ARMISD::NodeType CompareType;
2749 CompareType = ARMISD::CMP;
2754 CompareType = ARMISD::CMPZ;
2757 ARMcc = DAG.getConstant(CondCode, MVT::i32);
2758 return DAG.getNode(CompareType, dl, MVT::Glue, LHS, RHS);
2761 /// Returns a appropriate VFP CMP (fcmp{s|d}+fmstat) for the given operands.
2763 ARMTargetLowering::getVFPCmp(SDValue LHS, SDValue RHS, SelectionDAG &DAG,
2764 DebugLoc dl) const {
2766 if (!isFloatingPointZero(RHS))
2767 Cmp = DAG.getNode(ARMISD::CMPFP, dl, MVT::Glue, LHS, RHS);
2769 Cmp = DAG.getNode(ARMISD::CMPFPw0, dl, MVT::Glue, LHS);
2770 return DAG.getNode(ARMISD::FMSTAT, dl, MVT::Glue, Cmp);
2773 /// duplicateCmp - Glue values can have only one use, so this function
2774 /// duplicates a comparison node.
2776 ARMTargetLowering::duplicateCmp(SDValue Cmp, SelectionDAG &DAG) const {
2777 unsigned Opc = Cmp.getOpcode();
2778 DebugLoc DL = Cmp.getDebugLoc();
2779 if (Opc == ARMISD::CMP || Opc == ARMISD::CMPZ)
2780 return DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1));
2782 assert(Opc == ARMISD::FMSTAT && "unexpected comparison operation");
2783 Cmp = Cmp.getOperand(0);
2784 Opc = Cmp.getOpcode();
2785 if (Opc == ARMISD::CMPFP)
2786 Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1));
2788 assert(Opc == ARMISD::CMPFPw0 && "unexpected operand of FMSTAT");
2789 Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0));
2791 return DAG.getNode(ARMISD::FMSTAT, DL, MVT::Glue, Cmp);
2794 SDValue ARMTargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
2795 SDValue Cond = Op.getOperand(0);
2796 SDValue SelectTrue = Op.getOperand(1);
2797 SDValue SelectFalse = Op.getOperand(2);
2798 DebugLoc dl = Op.getDebugLoc();
2802 // (select (cmov 1, 0, cond), t, f) -> (cmov t, f, cond)
2803 // (select (cmov 0, 1, cond), t, f) -> (cmov f, t, cond)
2805 if (Cond.getOpcode() == ARMISD::CMOV && Cond.hasOneUse()) {
2806 const ConstantSDNode *CMOVTrue =
2807 dyn_cast<ConstantSDNode>(Cond.getOperand(0));
2808 const ConstantSDNode *CMOVFalse =
2809 dyn_cast<ConstantSDNode>(Cond.getOperand(1));
2811 if (CMOVTrue && CMOVFalse) {
2812 unsigned CMOVTrueVal = CMOVTrue->getZExtValue();
2813 unsigned CMOVFalseVal = CMOVFalse->getZExtValue();
2817 if (CMOVTrueVal == 1 && CMOVFalseVal == 0) {
2819 False = SelectFalse;
2820 } else if (CMOVTrueVal == 0 && CMOVFalseVal == 1) {
2825 if (True.getNode() && False.getNode()) {
2826 EVT VT = Op.getValueType();
2827 SDValue ARMcc = Cond.getOperand(2);
2828 SDValue CCR = Cond.getOperand(3);
2829 SDValue Cmp = duplicateCmp(Cond.getOperand(4), DAG);
2830 assert(True.getValueType() == VT);
2831 return DAG.getNode(ARMISD::CMOV, dl, VT, True, False, ARMcc, CCR, Cmp);
2836 return DAG.getSelectCC(dl, Cond,
2837 DAG.getConstant(0, Cond.getValueType()),
2838 SelectTrue, SelectFalse, ISD::SETNE);
2841 SDValue ARMTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
2842 EVT VT = Op.getValueType();
2843 SDValue LHS = Op.getOperand(0);
2844 SDValue RHS = Op.getOperand(1);
2845 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
2846 SDValue TrueVal = Op.getOperand(2);
2847 SDValue FalseVal = Op.getOperand(3);
2848 DebugLoc dl = Op.getDebugLoc();
2850 if (LHS.getValueType() == MVT::i32) {
2852 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2853 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
2854 return DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc, CCR,Cmp);
2857 ARMCC::CondCodes CondCode, CondCode2;
2858 FPCCToARMCC(CC, CondCode, CondCode2);
2860 SDValue ARMcc = DAG.getConstant(CondCode, MVT::i32);
2861 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
2862 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2863 SDValue Result = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal,
2865 if (CondCode2 != ARMCC::AL) {
2866 SDValue ARMcc2 = DAG.getConstant(CondCode2, MVT::i32);
2867 // FIXME: Needs another CMP because flag can have but one use.
2868 SDValue Cmp2 = getVFPCmp(LHS, RHS, DAG, dl);
2869 Result = DAG.getNode(ARMISD::CMOV, dl, VT,
2870 Result, TrueVal, ARMcc2, CCR, Cmp2);
2875 /// canChangeToInt - Given the fp compare operand, return true if it is suitable
2876 /// to morph to an integer compare sequence.
2877 static bool canChangeToInt(SDValue Op, bool &SeenZero,
2878 const ARMSubtarget *Subtarget) {
2879 SDNode *N = Op.getNode();
2880 if (!N->hasOneUse())
2881 // Otherwise it requires moving the value from fp to integer registers.
2883 if (!N->getNumValues())
2885 EVT VT = Op.getValueType();
2886 if (VT != MVT::f32 && !Subtarget->isFPBrccSlow())
2887 // f32 case is generally profitable. f64 case only makes sense when vcmpe +
2888 // vmrs are very slow, e.g. cortex-a8.
2891 if (isFloatingPointZero(Op)) {
2895 return ISD::isNormalLoad(N);
2898 static SDValue bitcastf32Toi32(SDValue Op, SelectionDAG &DAG) {
2899 if (isFloatingPointZero(Op))
2900 return DAG.getConstant(0, MVT::i32);
2902 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op))
2903 return DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2904 Ld->getChain(), Ld->getBasePtr(), Ld->getPointerInfo(),
2905 Ld->isVolatile(), Ld->isNonTemporal(),
2906 Ld->isInvariant(), Ld->getAlignment());
2908 llvm_unreachable("Unknown VFP cmp argument!");
2911 static void expandf64Toi32(SDValue Op, SelectionDAG &DAG,
2912 SDValue &RetVal1, SDValue &RetVal2) {
2913 if (isFloatingPointZero(Op)) {
2914 RetVal1 = DAG.getConstant(0, MVT::i32);
2915 RetVal2 = DAG.getConstant(0, MVT::i32);
2919 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op)) {
2920 SDValue Ptr = Ld->getBasePtr();
2921 RetVal1 = DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2922 Ld->getChain(), Ptr,
2923 Ld->getPointerInfo(),
2924 Ld->isVolatile(), Ld->isNonTemporal(),
2925 Ld->isInvariant(), Ld->getAlignment());
2927 EVT PtrType = Ptr.getValueType();
2928 unsigned NewAlign = MinAlign(Ld->getAlignment(), 4);
2929 SDValue NewPtr = DAG.getNode(ISD::ADD, Op.getDebugLoc(),
2930 PtrType, Ptr, DAG.getConstant(4, PtrType));
2931 RetVal2 = DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2932 Ld->getChain(), NewPtr,
2933 Ld->getPointerInfo().getWithOffset(4),
2934 Ld->isVolatile(), Ld->isNonTemporal(),
2935 Ld->isInvariant(), NewAlign);
2939 llvm_unreachable("Unknown VFP cmp argument!");
2942 /// OptimizeVFPBrcond - With -enable-unsafe-fp-math, it's legal to optimize some
2943 /// f32 and even f64 comparisons to integer ones.
2945 ARMTargetLowering::OptimizeVFPBrcond(SDValue Op, SelectionDAG &DAG) const {
2946 SDValue Chain = Op.getOperand(0);
2947 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
2948 SDValue LHS = Op.getOperand(2);
2949 SDValue RHS = Op.getOperand(3);
2950 SDValue Dest = Op.getOperand(4);
2951 DebugLoc dl = Op.getDebugLoc();
2953 bool SeenZero = false;
2954 if (canChangeToInt(LHS, SeenZero, Subtarget) &&
2955 canChangeToInt(RHS, SeenZero, Subtarget) &&
2956 // If one of the operand is zero, it's safe to ignore the NaN case since
2957 // we only care about equality comparisons.
2958 (SeenZero || (DAG.isKnownNeverNaN(LHS) && DAG.isKnownNeverNaN(RHS)))) {
2959 // If unsafe fp math optimization is enabled and there are no other uses of
2960 // the CMP operands, and the condition code is EQ or NE, we can optimize it
2961 // to an integer comparison.
2962 if (CC == ISD::SETOEQ)
2964 else if (CC == ISD::SETUNE)
2968 if (LHS.getValueType() == MVT::f32) {
2969 LHS = bitcastf32Toi32(LHS, DAG);
2970 RHS = bitcastf32Toi32(RHS, DAG);
2971 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
2972 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2973 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
2974 Chain, Dest, ARMcc, CCR, Cmp);
2979 expandf64Toi32(LHS, DAG, LHS1, LHS2);
2980 expandf64Toi32(RHS, DAG, RHS1, RHS2);
2981 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
2982 ARMcc = DAG.getConstant(CondCode, MVT::i32);
2983 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue);
2984 SDValue Ops[] = { Chain, ARMcc, LHS1, LHS2, RHS1, RHS2, Dest };
2985 return DAG.getNode(ARMISD::BCC_i64, dl, VTList, Ops, 7);
2991 SDValue ARMTargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) const {
2992 SDValue Chain = Op.getOperand(0);
2993 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
2994 SDValue LHS = Op.getOperand(2);
2995 SDValue RHS = Op.getOperand(3);
2996 SDValue Dest = Op.getOperand(4);
2997 DebugLoc dl = Op.getDebugLoc();
2999 if (LHS.getValueType() == MVT::i32) {
3001 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
3002 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3003 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
3004 Chain, Dest, ARMcc, CCR, Cmp);
3007 assert(LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64);
3009 if (getTargetMachine().Options.UnsafeFPMath &&
3010 (CC == ISD::SETEQ || CC == ISD::SETOEQ ||
3011 CC == ISD::SETNE || CC == ISD::SETUNE)) {
3012 SDValue Result = OptimizeVFPBrcond(Op, DAG);
3013 if (Result.getNode())
3017 ARMCC::CondCodes CondCode, CondCode2;
3018 FPCCToARMCC(CC, CondCode, CondCode2);
3020 SDValue ARMcc = DAG.getConstant(CondCode, MVT::i32);
3021 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
3022 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3023 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue);
3024 SDValue Ops[] = { Chain, Dest, ARMcc, CCR, Cmp };
3025 SDValue Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops, 5);
3026 if (CondCode2 != ARMCC::AL) {
3027 ARMcc = DAG.getConstant(CondCode2, MVT::i32);
3028 SDValue Ops[] = { Res, Dest, ARMcc, CCR, Res.getValue(1) };
3029 Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops, 5);
3034 SDValue ARMTargetLowering::LowerBR_JT(SDValue Op, SelectionDAG &DAG) const {
3035 SDValue Chain = Op.getOperand(0);
3036 SDValue Table = Op.getOperand(1);
3037 SDValue Index = Op.getOperand(2);
3038 DebugLoc dl = Op.getDebugLoc();
3040 EVT PTy = getPointerTy();
3041 JumpTableSDNode *JT = cast<JumpTableSDNode>(Table);
3042 ARMFunctionInfo *AFI = DAG.getMachineFunction().getInfo<ARMFunctionInfo>();
3043 SDValue UId = DAG.getConstant(AFI->createJumpTableUId(), PTy);
3044 SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PTy);
3045 Table = DAG.getNode(ARMISD::WrapperJT, dl, MVT::i32, JTI, UId);
3046 Index = DAG.getNode(ISD::MUL, dl, PTy, Index, DAG.getConstant(4, PTy));
3047 SDValue Addr = DAG.getNode(ISD::ADD, dl, PTy, Index, Table);
3048 if (Subtarget->isThumb2()) {
3049 // Thumb2 uses a two-level jump. That is, it jumps into the jump table
3050 // which does another jump to the destination. This also makes it easier
3051 // to translate it to TBB / TBH later.
3052 // FIXME: This might not work if the function is extremely large.
3053 return DAG.getNode(ARMISD::BR2_JT, dl, MVT::Other, Chain,
3054 Addr, Op.getOperand(2), JTI, UId);
3056 if (getTargetMachine().getRelocationModel() == Reloc::PIC_) {
3057 Addr = DAG.getLoad((EVT)MVT::i32, dl, Chain, Addr,
3058 MachinePointerInfo::getJumpTable(),
3059 false, false, false, 0);
3060 Chain = Addr.getValue(1);
3061 Addr = DAG.getNode(ISD::ADD, dl, PTy, Addr, Table);
3062 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
3064 Addr = DAG.getLoad(PTy, dl, Chain, Addr,
3065 MachinePointerInfo::getJumpTable(),
3066 false, false, false, 0);
3067 Chain = Addr.getValue(1);
3068 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
3072 static SDValue LowerVectorFP_TO_INT(SDValue Op, SelectionDAG &DAG) {
3073 EVT VT = Op.getValueType();
3074 DebugLoc dl = Op.getDebugLoc();
3076 if (Op.getValueType().getVectorElementType() == MVT::i32) {
3077 if (Op.getOperand(0).getValueType().getVectorElementType() == MVT::f32)
3079 return DAG.UnrollVectorOp(Op.getNode());
3082 assert(Op.getOperand(0).getValueType() == MVT::v4f32 &&
3083 "Invalid type for custom lowering!");
3084 if (VT != MVT::v4i16)
3085 return DAG.UnrollVectorOp(Op.getNode());
3087 Op = DAG.getNode(Op.getOpcode(), dl, MVT::v4i32, Op.getOperand(0));
3088 return DAG.getNode(ISD::TRUNCATE, dl, VT, Op);
3091 static SDValue LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG) {
3092 EVT VT = Op.getValueType();
3094 return LowerVectorFP_TO_INT(Op, DAG);
3096 DebugLoc dl = Op.getDebugLoc();
3099 switch (Op.getOpcode()) {
3100 default: llvm_unreachable("Invalid opcode!");
3101 case ISD::FP_TO_SINT:
3102 Opc = ARMISD::FTOSI;
3104 case ISD::FP_TO_UINT:
3105 Opc = ARMISD::FTOUI;
3108 Op = DAG.getNode(Opc, dl, MVT::f32, Op.getOperand(0));
3109 return DAG.getNode(ISD::BITCAST, dl, MVT::i32, Op);
3112 static SDValue LowerVectorINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
3113 EVT VT = Op.getValueType();
3114 DebugLoc dl = Op.getDebugLoc();
3116 if (Op.getOperand(0).getValueType().getVectorElementType() == MVT::i32) {
3117 if (VT.getVectorElementType() == MVT::f32)
3119 return DAG.UnrollVectorOp(Op.getNode());
3122 assert(Op.getOperand(0).getValueType() == MVT::v4i16 &&
3123 "Invalid type for custom lowering!");
3124 if (VT != MVT::v4f32)
3125 return DAG.UnrollVectorOp(Op.getNode());
3129 switch (Op.getOpcode()) {
3130 default: llvm_unreachable("Invalid opcode!");
3131 case ISD::SINT_TO_FP:
3132 CastOpc = ISD::SIGN_EXTEND;
3133 Opc = ISD::SINT_TO_FP;
3135 case ISD::UINT_TO_FP:
3136 CastOpc = ISD::ZERO_EXTEND;
3137 Opc = ISD::UINT_TO_FP;
3141 Op = DAG.getNode(CastOpc, dl, MVT::v4i32, Op.getOperand(0));
3142 return DAG.getNode(Opc, dl, VT, Op);
3145 static SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
3146 EVT VT = Op.getValueType();
3148 return LowerVectorINT_TO_FP(Op, DAG);
3150 DebugLoc dl = Op.getDebugLoc();
3153 switch (Op.getOpcode()) {
3154 default: llvm_unreachable("Invalid opcode!");
3155 case ISD::SINT_TO_FP:
3156 Opc = ARMISD::SITOF;
3158 case ISD::UINT_TO_FP:
3159 Opc = ARMISD::UITOF;
3163 Op = DAG.getNode(ISD::BITCAST, dl, MVT::f32, Op.getOperand(0));
3164 return DAG.getNode(Opc, dl, VT, Op);
3167 SDValue ARMTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
3168 // Implement fcopysign with a fabs and a conditional fneg.
3169 SDValue Tmp0 = Op.getOperand(0);
3170 SDValue Tmp1 = Op.getOperand(1);
3171 DebugLoc dl = Op.getDebugLoc();
3172 EVT VT = Op.getValueType();
3173 EVT SrcVT = Tmp1.getValueType();
3174 bool InGPR = Tmp0.getOpcode() == ISD::BITCAST ||
3175 Tmp0.getOpcode() == ARMISD::VMOVDRR;
3176 bool UseNEON = !InGPR && Subtarget->hasNEON();
3179 // Use VBSL to copy the sign bit.
3180 unsigned EncodedVal = ARM_AM::createNEONModImm(0x6, 0x80);
3181 SDValue Mask = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v2i32,
3182 DAG.getTargetConstant(EncodedVal, MVT::i32));
3183 EVT OpVT = (VT == MVT::f32) ? MVT::v2i32 : MVT::v1i64;
3185 Mask = DAG.getNode(ARMISD::VSHL, dl, OpVT,
3186 DAG.getNode(ISD::BITCAST, dl, OpVT, Mask),
3187 DAG.getConstant(32, MVT::i32));
3188 else /*if (VT == MVT::f32)*/
3189 Tmp0 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp0);
3190 if (SrcVT == MVT::f32) {
3191 Tmp1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp1);
3193 Tmp1 = DAG.getNode(ARMISD::VSHL, dl, OpVT,
3194 DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1),
3195 DAG.getConstant(32, MVT::i32));
3196 } else if (VT == MVT::f32)
3197 Tmp1 = DAG.getNode(ARMISD::VSHRu, dl, MVT::v1i64,
3198 DAG.getNode(ISD::BITCAST, dl, MVT::v1i64, Tmp1),
3199 DAG.getConstant(32, MVT::i32));
3200 Tmp0 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp0);
3201 Tmp1 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1);
3203 SDValue AllOnes = DAG.getTargetConstant(ARM_AM::createNEONModImm(0xe, 0xff),
3205 AllOnes = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v8i8, AllOnes);
3206 SDValue MaskNot = DAG.getNode(ISD::XOR, dl, OpVT, Mask,
3207 DAG.getNode(ISD::BITCAST, dl, OpVT, AllOnes));
3209 SDValue Res = DAG.getNode(ISD::OR, dl, OpVT,
3210 DAG.getNode(ISD::AND, dl, OpVT, Tmp1, Mask),
3211 DAG.getNode(ISD::AND, dl, OpVT, Tmp0, MaskNot));
3212 if (VT == MVT::f32) {
3213 Res = DAG.getNode(ISD::BITCAST, dl, MVT::v2f32, Res);
3214 Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, Res,
3215 DAG.getConstant(0, MVT::i32));
3217 Res = DAG.getNode(ISD::BITCAST, dl, MVT::f64, Res);
3223 // Bitcast operand 1 to i32.
3224 if (SrcVT == MVT::f64)
3225 Tmp1 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32),
3226 &Tmp1, 1).getValue(1);
3227 Tmp1 = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp1);
3229 // Or in the signbit with integer operations.
3230 SDValue Mask1 = DAG.getConstant(0x80000000, MVT::i32);
3231 SDValue Mask2 = DAG.getConstant(0x7fffffff, MVT::i32);
3232 Tmp1 = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp1, Mask1);
3233 if (VT == MVT::f32) {
3234 Tmp0 = DAG.getNode(ISD::AND, dl, MVT::i32,
3235 DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp0), Mask2);
3236 return DAG.getNode(ISD::BITCAST, dl, MVT::f32,
3237 DAG.getNode(ISD::OR, dl, MVT::i32, Tmp0, Tmp1));
3240 // f64: Or the high part with signbit and then combine two parts.
3241 Tmp0 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32),
3243 SDValue Lo = Tmp0.getValue(0);
3244 SDValue Hi = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp0.getValue(1), Mask2);
3245 Hi = DAG.getNode(ISD::OR, dl, MVT::i32, Hi, Tmp1);
3246 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
3249 SDValue ARMTargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const{
3250 MachineFunction &MF = DAG.getMachineFunction();
3251 MachineFrameInfo *MFI = MF.getFrameInfo();
3252 MFI->setReturnAddressIsTaken(true);
3254 EVT VT = Op.getValueType();
3255 DebugLoc dl = Op.getDebugLoc();
3256 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
3258 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
3259 SDValue Offset = DAG.getConstant(4, MVT::i32);
3260 return DAG.getLoad(VT, dl, DAG.getEntryNode(),
3261 DAG.getNode(ISD::ADD, dl, VT, FrameAddr, Offset),
3262 MachinePointerInfo(), false, false, false, 0);
3265 // Return LR, which contains the return address. Mark it an implicit live-in.
3266 unsigned Reg = MF.addLiveIn(ARM::LR, getRegClassFor(MVT::i32));
3267 return DAG.getCopyFromReg(DAG.getEntryNode(), dl, Reg, VT);
3270 SDValue ARMTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
3271 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
3272 MFI->setFrameAddressIsTaken(true);
3274 EVT VT = Op.getValueType();
3275 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
3276 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
3277 unsigned FrameReg = (Subtarget->isThumb() || Subtarget->isTargetDarwin())
3278 ? ARM::R7 : ARM::R11;
3279 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
3281 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
3282 MachinePointerInfo(),
3283 false, false, false, 0);
3287 /// ExpandBITCAST - If the target supports VFP, this function is called to
3288 /// expand a bit convert where either the source or destination type is i64 to
3289 /// use a VMOVDRR or VMOVRRD node. This should not be done when the non-i64
3290 /// operand type is illegal (e.g., v2f32 for a target that doesn't support
3291 /// vectors), since the legalizer won't know what to do with that.
3292 static SDValue ExpandBITCAST(SDNode *N, SelectionDAG &DAG) {
3293 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
3294 DebugLoc dl = N->getDebugLoc();
3295 SDValue Op = N->getOperand(0);
3297 // This function is only supposed to be called for i64 types, either as the
3298 // source or destination of the bit convert.
3299 EVT SrcVT = Op.getValueType();
3300 EVT DstVT = N->getValueType(0);
3301 assert((SrcVT == MVT::i64 || DstVT == MVT::i64) &&
3302 "ExpandBITCAST called for non-i64 type");
3304 // Turn i64->f64 into VMOVDRR.
3305 if (SrcVT == MVT::i64 && TLI.isTypeLegal(DstVT)) {
3306 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
3307 DAG.getConstant(0, MVT::i32));
3308 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
3309 DAG.getConstant(1, MVT::i32));
3310 return DAG.getNode(ISD::BITCAST, dl, DstVT,
3311 DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi));
3314 // Turn f64->i64 into VMOVRRD.
3315 if (DstVT == MVT::i64 && TLI.isTypeLegal(SrcVT)) {
3316 SDValue Cvt = DAG.getNode(ARMISD::VMOVRRD, dl,
3317 DAG.getVTList(MVT::i32, MVT::i32), &Op, 1);
3318 // Merge the pieces into a single i64 value.
3319 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Cvt, Cvt.getValue(1));
3325 /// getZeroVector - Returns a vector of specified type with all zero elements.
3326 /// Zero vectors are used to represent vector negation and in those cases
3327 /// will be implemented with the NEON VNEG instruction. However, VNEG does
3328 /// not support i64 elements, so sometimes the zero vectors will need to be
3329 /// explicitly constructed. Regardless, use a canonical VMOV to create the
3331 static SDValue getZeroVector(EVT VT, SelectionDAG &DAG, DebugLoc dl) {
3332 assert(VT.isVector() && "Expected a vector type");
3333 // The canonical modified immediate encoding of a zero vector is....0!
3334 SDValue EncodedVal = DAG.getTargetConstant(0, MVT::i32);
3335 EVT VmovVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32;
3336 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, EncodedVal);
3337 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
3340 /// LowerShiftRightParts - Lower SRA_PARTS, which returns two
3341 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
3342 SDValue ARMTargetLowering::LowerShiftRightParts(SDValue Op,
3343 SelectionDAG &DAG) const {
3344 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
3345 EVT VT = Op.getValueType();
3346 unsigned VTBits = VT.getSizeInBits();
3347 DebugLoc dl = Op.getDebugLoc();
3348 SDValue ShOpLo = Op.getOperand(0);
3349 SDValue ShOpHi = Op.getOperand(1);
3350 SDValue ShAmt = Op.getOperand(2);
3352 unsigned Opc = (Op.getOpcode() == ISD::SRA_PARTS) ? ISD::SRA : ISD::SRL;
3354 assert(Op.getOpcode() == ISD::SRA_PARTS || Op.getOpcode() == ISD::SRL_PARTS);
3356 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
3357 DAG.getConstant(VTBits, MVT::i32), ShAmt);
3358 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, ShAmt);
3359 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
3360 DAG.getConstant(VTBits, MVT::i32));
3361 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, RevShAmt);
3362 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
3363 SDValue TrueVal = DAG.getNode(Opc, dl, VT, ShOpHi, ExtraShAmt);
3365 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3366 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
3368 SDValue Hi = DAG.getNode(Opc, dl, VT, ShOpHi, ShAmt);
3369 SDValue Lo = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc,
3372 SDValue Ops[2] = { Lo, Hi };
3373 return DAG.getMergeValues(Ops, 2, dl);
3376 /// LowerShiftLeftParts - Lower SHL_PARTS, which returns two
3377 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
3378 SDValue ARMTargetLowering::LowerShiftLeftParts(SDValue Op,
3379 SelectionDAG &DAG) const {
3380 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
3381 EVT VT = Op.getValueType();
3382 unsigned VTBits = VT.getSizeInBits();
3383 DebugLoc dl = Op.getDebugLoc();
3384 SDValue ShOpLo = Op.getOperand(0);
3385 SDValue ShOpHi = Op.getOperand(1);
3386 SDValue ShAmt = Op.getOperand(2);
3389 assert(Op.getOpcode() == ISD::SHL_PARTS);
3390 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
3391 DAG.getConstant(VTBits, MVT::i32), ShAmt);
3392 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, RevShAmt);
3393 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
3394 DAG.getConstant(VTBits, MVT::i32));
3395 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, ShAmt);
3396 SDValue Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ExtraShAmt);
3398 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
3399 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3400 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
3402 SDValue Lo = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
3403 SDValue Hi = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, Tmp3, ARMcc,
3406 SDValue Ops[2] = { Lo, Hi };
3407 return DAG.getMergeValues(Ops, 2, dl);
3410 SDValue ARMTargetLowering::LowerFLT_ROUNDS_(SDValue Op,
3411 SelectionDAG &DAG) const {
3412 // The rounding mode is in bits 23:22 of the FPSCR.
3413 // The ARM rounding mode value to FLT_ROUNDS mapping is 0->1, 1->2, 2->3, 3->0
3414 // The formula we use to implement this is (((FPSCR + 1 << 22) >> 22) & 3)
3415 // so that the shift + and get folded into a bitfield extract.
3416 DebugLoc dl = Op.getDebugLoc();
3417 SDValue FPSCR = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::i32,
3418 DAG.getConstant(Intrinsic::arm_get_fpscr,
3420 SDValue FltRounds = DAG.getNode(ISD::ADD, dl, MVT::i32, FPSCR,
3421 DAG.getConstant(1U << 22, MVT::i32));
3422 SDValue RMODE = DAG.getNode(ISD::SRL, dl, MVT::i32, FltRounds,
3423 DAG.getConstant(22, MVT::i32));
3424 return DAG.getNode(ISD::AND, dl, MVT::i32, RMODE,
3425 DAG.getConstant(3, MVT::i32));
3428 static SDValue LowerCTTZ(SDNode *N, SelectionDAG &DAG,
3429 const ARMSubtarget *ST) {
3430 EVT VT = N->getValueType(0);
3431 DebugLoc dl = N->getDebugLoc();
3433 if (!ST->hasV6T2Ops())
3436 SDValue rbit = DAG.getNode(ARMISD::RBIT, dl, VT, N->getOperand(0));
3437 return DAG.getNode(ISD::CTLZ, dl, VT, rbit);
3440 static SDValue LowerShift(SDNode *N, SelectionDAG &DAG,
3441 const ARMSubtarget *ST) {
3442 EVT VT = N->getValueType(0);
3443 DebugLoc dl = N->getDebugLoc();
3448 // Lower vector shifts on NEON to use VSHL.
3449 assert(ST->hasNEON() && "unexpected vector shift");
3451 // Left shifts translate directly to the vshiftu intrinsic.
3452 if (N->getOpcode() == ISD::SHL)
3453 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
3454 DAG.getConstant(Intrinsic::arm_neon_vshiftu, MVT::i32),
3455 N->getOperand(0), N->getOperand(1));
3457 assert((N->getOpcode() == ISD::SRA ||
3458 N->getOpcode() == ISD::SRL) && "unexpected vector shift opcode");
3460 // NEON uses the same intrinsics for both left and right shifts. For
3461 // right shifts, the shift amounts are negative, so negate the vector of
3463 EVT ShiftVT = N->getOperand(1).getValueType();
3464 SDValue NegatedCount = DAG.getNode(ISD::SUB, dl, ShiftVT,
3465 getZeroVector(ShiftVT, DAG, dl),
3467 Intrinsic::ID vshiftInt = (N->getOpcode() == ISD::SRA ?
3468 Intrinsic::arm_neon_vshifts :
3469 Intrinsic::arm_neon_vshiftu);
3470 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
3471 DAG.getConstant(vshiftInt, MVT::i32),
3472 N->getOperand(0), NegatedCount);
3475 static SDValue Expand64BitShift(SDNode *N, SelectionDAG &DAG,
3476 const ARMSubtarget *ST) {
3477 EVT VT = N->getValueType(0);
3478 DebugLoc dl = N->getDebugLoc();
3480 // We can get here for a node like i32 = ISD::SHL i32, i64
3484 assert((N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA) &&
3485 "Unknown shift to lower!");
3487 // We only lower SRA, SRL of 1 here, all others use generic lowering.
3488 if (!isa<ConstantSDNode>(N->getOperand(1)) ||
3489 cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() != 1)
3492 // If we are in thumb mode, we don't have RRX.
3493 if (ST->isThumb1Only()) return SDValue();
3495 // Okay, we have a 64-bit SRA or SRL of 1. Lower this to an RRX expr.
3496 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
3497 DAG.getConstant(0, MVT::i32));
3498 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
3499 DAG.getConstant(1, MVT::i32));
3501 // First, build a SRA_FLAG/SRL_FLAG op, which shifts the top part by one and
3502 // captures the result into a carry flag.
3503 unsigned Opc = N->getOpcode() == ISD::SRL ? ARMISD::SRL_FLAG:ARMISD::SRA_FLAG;
3504 Hi = DAG.getNode(Opc, dl, DAG.getVTList(MVT::i32, MVT::Glue), &Hi, 1);
3506 // The low part is an ARMISD::RRX operand, which shifts the carry in.
3507 Lo = DAG.getNode(ARMISD::RRX, dl, MVT::i32, Lo, Hi.getValue(1));
3509 // Merge the pieces into a single i64 value.
3510 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi);
3513 static SDValue LowerVSETCC(SDValue Op, SelectionDAG &DAG) {
3514 SDValue TmpOp0, TmpOp1;
3515 bool Invert = false;
3519 SDValue Op0 = Op.getOperand(0);
3520 SDValue Op1 = Op.getOperand(1);
3521 SDValue CC = Op.getOperand(2);
3522 EVT VT = Op.getValueType();
3523 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
3524 DebugLoc dl = Op.getDebugLoc();
3526 if (Op.getOperand(1).getValueType().isFloatingPoint()) {
3527 switch (SetCCOpcode) {
3528 default: llvm_unreachable("Illegal FP comparison");
3530 case ISD::SETNE: Invert = true; // Fallthrough
3532 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
3534 case ISD::SETLT: Swap = true; // Fallthrough
3536 case ISD::SETGT: Opc = ARMISD::VCGT; break;
3538 case ISD::SETLE: Swap = true; // Fallthrough
3540 case ISD::SETGE: Opc = ARMISD::VCGE; break;
3541 case ISD::SETUGE: Swap = true; // Fallthrough
3542 case ISD::SETULE: Invert = true; Opc = ARMISD::VCGT; break;
3543 case ISD::SETUGT: Swap = true; // Fallthrough
3544 case ISD::SETULT: Invert = true; Opc = ARMISD::VCGE; break;
3545 case ISD::SETUEQ: Invert = true; // Fallthrough
3547 // Expand this to (OLT | OGT).
3551 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
3552 Op1 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp0, TmpOp1);
3554 case ISD::SETUO: Invert = true; // Fallthrough
3556 // Expand this to (OLT | OGE).
3560 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
3561 Op1 = DAG.getNode(ARMISD::VCGE, dl, VT, TmpOp0, TmpOp1);
3565 // Integer comparisons.
3566 switch (SetCCOpcode) {
3567 default: llvm_unreachable("Illegal integer comparison");
3568 case ISD::SETNE: Invert = true;
3569 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
3570 case ISD::SETLT: Swap = true;
3571 case ISD::SETGT: Opc = ARMISD::VCGT; break;
3572 case ISD::SETLE: Swap = true;
3573 case ISD::SETGE: Opc = ARMISD::VCGE; break;
3574 case ISD::SETULT: Swap = true;
3575 case ISD::SETUGT: Opc = ARMISD::VCGTU; break;
3576 case ISD::SETULE: Swap = true;
3577 case ISD::SETUGE: Opc = ARMISD::VCGEU; break;
3580 // Detect VTST (Vector Test Bits) = icmp ne (and (op0, op1), zero).
3581 if (Opc == ARMISD::VCEQ) {
3584 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
3586 else if (ISD::isBuildVectorAllZeros(Op0.getNode()))
3589 // Ignore bitconvert.
3590 if (AndOp.getNode() && AndOp.getOpcode() == ISD::BITCAST)
3591 AndOp = AndOp.getOperand(0);
3593 if (AndOp.getNode() && AndOp.getOpcode() == ISD::AND) {
3595 Op0 = DAG.getNode(ISD::BITCAST, dl, VT, AndOp.getOperand(0));
3596 Op1 = DAG.getNode(ISD::BITCAST, dl, VT, AndOp.getOperand(1));
3603 std::swap(Op0, Op1);
3605 // If one of the operands is a constant vector zero, attempt to fold the
3606 // comparison to a specialized compare-against-zero form.
3608 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
3610 else if (ISD::isBuildVectorAllZeros(Op0.getNode())) {
3611 if (Opc == ARMISD::VCGE)
3612 Opc = ARMISD::VCLEZ;
3613 else if (Opc == ARMISD::VCGT)
3614 Opc = ARMISD::VCLTZ;
3619 if (SingleOp.getNode()) {
3622 Result = DAG.getNode(ARMISD::VCEQZ, dl, VT, SingleOp); break;
3624 Result = DAG.getNode(ARMISD::VCGEZ, dl, VT, SingleOp); break;
3626 Result = DAG.getNode(ARMISD::VCLEZ, dl, VT, SingleOp); break;
3628 Result = DAG.getNode(ARMISD::VCGTZ, dl, VT, SingleOp); break;
3630 Result = DAG.getNode(ARMISD::VCLTZ, dl, VT, SingleOp); break;
3632 Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
3635 Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
3639 Result = DAG.getNOT(dl, Result, VT);
3644 /// isNEONModifiedImm - Check if the specified splat value corresponds to a
3645 /// valid vector constant for a NEON instruction with a "modified immediate"
3646 /// operand (e.g., VMOV). If so, return the encoded value.
3647 static SDValue isNEONModifiedImm(uint64_t SplatBits, uint64_t SplatUndef,
3648 unsigned SplatBitSize, SelectionDAG &DAG,
3649 EVT &VT, bool is128Bits, NEONModImmType type) {
3650 unsigned OpCmode, Imm;
3652 // SplatBitSize is set to the smallest size that splats the vector, so a
3653 // zero vector will always have SplatBitSize == 8. However, NEON modified
3654 // immediate instructions others than VMOV do not support the 8-bit encoding
3655 // of a zero vector, and the default encoding of zero is supposed to be the
3660 switch (SplatBitSize) {
3662 if (type != VMOVModImm)
3664 // Any 1-byte value is OK. Op=0, Cmode=1110.
3665 assert((SplatBits & ~0xff) == 0 && "one byte splat value is too big");
3668 VT = is128Bits ? MVT::v16i8 : MVT::v8i8;
3672 // NEON's 16-bit VMOV supports splat values where only one byte is nonzero.
3673 VT = is128Bits ? MVT::v8i16 : MVT::v4i16;
3674 if ((SplatBits & ~0xff) == 0) {
3675 // Value = 0x00nn: Op=x, Cmode=100x.
3680 if ((SplatBits & ~0xff00) == 0) {
3681 // Value = 0xnn00: Op=x, Cmode=101x.
3683 Imm = SplatBits >> 8;
3689 // NEON's 32-bit VMOV supports splat values where:
3690 // * only one byte is nonzero, or
3691 // * the least significant byte is 0xff and the second byte is nonzero, or
3692 // * the least significant 2 bytes are 0xff and the third is nonzero.
3693 VT = is128Bits ? MVT::v4i32 : MVT::v2i32;
3694 if ((SplatBits & ~0xff) == 0) {
3695 // Value = 0x000000nn: Op=x, Cmode=000x.
3700 if ((SplatBits & ~0xff00) == 0) {
3701 // Value = 0x0000nn00: Op=x, Cmode=001x.
3703 Imm = SplatBits >> 8;
3706 if ((SplatBits & ~0xff0000) == 0) {
3707 // Value = 0x00nn0000: Op=x, Cmode=010x.
3709 Imm = SplatBits >> 16;
3712 if ((SplatBits & ~0xff000000) == 0) {
3713 // Value = 0xnn000000: Op=x, Cmode=011x.
3715 Imm = SplatBits >> 24;
3719 // cmode == 0b1100 and cmode == 0b1101 are not supported for VORR or VBIC
3720 if (type == OtherModImm) return SDValue();
3722 if ((SplatBits & ~0xffff) == 0 &&
3723 ((SplatBits | SplatUndef) & 0xff) == 0xff) {
3724 // Value = 0x0000nnff: Op=x, Cmode=1100.
3726 Imm = SplatBits >> 8;
3731 if ((SplatBits & ~0xffffff) == 0 &&
3732 ((SplatBits | SplatUndef) & 0xffff) == 0xffff) {
3733 // Value = 0x00nnffff: Op=x, Cmode=1101.
3735 Imm = SplatBits >> 16;
3736 SplatBits |= 0xffff;
3740 // Note: there are a few 32-bit splat values (specifically: 00ffff00,
3741 // ff000000, ff0000ff, and ffff00ff) that are valid for VMOV.I64 but not
3742 // VMOV.I32. A (very) minor optimization would be to replicate the value
3743 // and fall through here to test for a valid 64-bit splat. But, then the
3744 // caller would also need to check and handle the change in size.
3748 if (type != VMOVModImm)
3750 // NEON has a 64-bit VMOV splat where each byte is either 0 or 0xff.
3751 uint64_t BitMask = 0xff;
3753 unsigned ImmMask = 1;
3755 for (int ByteNum = 0; ByteNum < 8; ++ByteNum) {
3756 if (((SplatBits | SplatUndef) & BitMask) == BitMask) {
3759 } else if ((SplatBits & BitMask) != 0) {
3765 // Op=1, Cmode=1110.
3768 VT = is128Bits ? MVT::v2i64 : MVT::v1i64;
3773 llvm_unreachable("unexpected size for isNEONModifiedImm");
3776 unsigned EncodedVal = ARM_AM::createNEONModImm(OpCmode, Imm);
3777 return DAG.getTargetConstant(EncodedVal, MVT::i32);
3780 static bool isVEXTMask(ArrayRef<int> M, EVT VT,
3781 bool &ReverseVEXT, unsigned &Imm) {
3782 unsigned NumElts = VT.getVectorNumElements();
3783 ReverseVEXT = false;
3785 // Assume that the first shuffle index is not UNDEF. Fail if it is.
3791 // If this is a VEXT shuffle, the immediate value is the index of the first
3792 // element. The other shuffle indices must be the successive elements after
3794 unsigned ExpectedElt = Imm;
3795 for (unsigned i = 1; i < NumElts; ++i) {
3796 // Increment the expected index. If it wraps around, it may still be
3797 // a VEXT but the source vectors must be swapped.
3799 if (ExpectedElt == NumElts * 2) {
3804 if (M[i] < 0) continue; // ignore UNDEF indices
3805 if (ExpectedElt != static_cast<unsigned>(M[i]))
3809 // Adjust the index value if the source operands will be swapped.
3816 /// isVREVMask - Check if a vector shuffle corresponds to a VREV
3817 /// instruction with the specified blocksize. (The order of the elements
3818 /// within each block of the vector is reversed.)
3819 static bool isVREVMask(ArrayRef<int> M, EVT VT, unsigned BlockSize) {
3820 assert((BlockSize==16 || BlockSize==32 || BlockSize==64) &&
3821 "Only possible block sizes for VREV are: 16, 32, 64");
3823 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3827 unsigned NumElts = VT.getVectorNumElements();
3828 unsigned BlockElts = M[0] + 1;
3829 // If the first shuffle index is UNDEF, be optimistic.
3831 BlockElts = BlockSize / EltSz;
3833 if (BlockSize <= EltSz || BlockSize != BlockElts * EltSz)
3836 for (unsigned i = 0; i < NumElts; ++i) {
3837 if (M[i] < 0) continue; // ignore UNDEF indices
3838 if ((unsigned) M[i] != (i - i%BlockElts) + (BlockElts - 1 - i%BlockElts))
3845 static bool isVTBLMask(ArrayRef<int> M, EVT VT) {
3846 // We can handle <8 x i8> vector shuffles. If the index in the mask is out of
3847 // range, then 0 is placed into the resulting vector. So pretty much any mask
3848 // of 8 elements can work here.
3849 return VT == MVT::v8i8 && M.size() == 8;
3852 static bool isVTRNMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
3853 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3857 unsigned NumElts = VT.getVectorNumElements();
3858 WhichResult = (M[0] == 0 ? 0 : 1);
3859 for (unsigned i = 0; i < NumElts; i += 2) {
3860 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
3861 (M[i+1] >= 0 && (unsigned) M[i+1] != i + NumElts + WhichResult))
3867 /// isVTRN_v_undef_Mask - Special case of isVTRNMask for canonical form of
3868 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
3869 /// Mask is e.g., <0, 0, 2, 2> instead of <0, 4, 2, 6>.
3870 static bool isVTRN_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
3871 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3875 unsigned NumElts = VT.getVectorNumElements();
3876 WhichResult = (M[0] == 0 ? 0 : 1);
3877 for (unsigned i = 0; i < NumElts; i += 2) {
3878 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
3879 (M[i+1] >= 0 && (unsigned) M[i+1] != i + WhichResult))
3885 static bool isVUZPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
3886 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3890 unsigned NumElts = VT.getVectorNumElements();
3891 WhichResult = (M[0] == 0 ? 0 : 1);
3892 for (unsigned i = 0; i != NumElts; ++i) {
3893 if (M[i] < 0) continue; // ignore UNDEF indices
3894 if ((unsigned) M[i] != 2 * i + WhichResult)
3898 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3899 if (VT.is64BitVector() && EltSz == 32)
3905 /// isVUZP_v_undef_Mask - Special case of isVUZPMask for canonical form of
3906 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
3907 /// Mask is e.g., <0, 2, 0, 2> instead of <0, 2, 4, 6>,
3908 static bool isVUZP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
3909 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3913 unsigned Half = VT.getVectorNumElements() / 2;
3914 WhichResult = (M[0] == 0 ? 0 : 1);
3915 for (unsigned j = 0; j != 2; ++j) {
3916 unsigned Idx = WhichResult;
3917 for (unsigned i = 0; i != Half; ++i) {
3918 int MIdx = M[i + j * Half];
3919 if (MIdx >= 0 && (unsigned) MIdx != Idx)
3925 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3926 if (VT.is64BitVector() && EltSz == 32)
3932 static bool isVZIPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
3933 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3937 unsigned NumElts = VT.getVectorNumElements();
3938 WhichResult = (M[0] == 0 ? 0 : 1);
3939 unsigned Idx = WhichResult * NumElts / 2;
3940 for (unsigned i = 0; i != NumElts; i += 2) {
3941 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
3942 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx + NumElts))
3947 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3948 if (VT.is64BitVector() && EltSz == 32)
3954 /// isVZIP_v_undef_Mask - Special case of isVZIPMask for canonical form of
3955 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
3956 /// Mask is e.g., <0, 0, 1, 1> instead of <0, 4, 1, 5>.
3957 static bool isVZIP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
3958 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3962 unsigned NumElts = VT.getVectorNumElements();
3963 WhichResult = (M[0] == 0 ? 0 : 1);
3964 unsigned Idx = WhichResult * NumElts / 2;
3965 for (unsigned i = 0; i != NumElts; i += 2) {
3966 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
3967 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx))
3972 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3973 if (VT.is64BitVector() && EltSz == 32)
3979 // If N is an integer constant that can be moved into a register in one
3980 // instruction, return an SDValue of such a constant (will become a MOV
3981 // instruction). Otherwise return null.
3982 static SDValue IsSingleInstrConstant(SDValue N, SelectionDAG &DAG,
3983 const ARMSubtarget *ST, DebugLoc dl) {
3985 if (!isa<ConstantSDNode>(N))
3987 Val = cast<ConstantSDNode>(N)->getZExtValue();
3989 if (ST->isThumb1Only()) {
3990 if (Val <= 255 || ~Val <= 255)
3991 return DAG.getConstant(Val, MVT::i32);
3993 if (ARM_AM::getSOImmVal(Val) != -1 || ARM_AM::getSOImmVal(~Val) != -1)
3994 return DAG.getConstant(Val, MVT::i32);
3999 // If this is a case we can't handle, return null and let the default
4000 // expansion code take care of it.
4001 SDValue ARMTargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG,
4002 const ARMSubtarget *ST) const {
4003 BuildVectorSDNode *BVN = cast<BuildVectorSDNode>(Op.getNode());
4004 DebugLoc dl = Op.getDebugLoc();
4005 EVT VT = Op.getValueType();
4007 APInt SplatBits, SplatUndef;
4008 unsigned SplatBitSize;
4010 if (BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
4011 if (SplatBitSize <= 64) {
4012 // Check if an immediate VMOV works.
4014 SDValue Val = isNEONModifiedImm(SplatBits.getZExtValue(),
4015 SplatUndef.getZExtValue(), SplatBitSize,
4016 DAG, VmovVT, VT.is128BitVector(),
4018 if (Val.getNode()) {
4019 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, Val);
4020 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
4023 // Try an immediate VMVN.
4024 uint64_t NegatedImm = (~SplatBits).getZExtValue();
4025 Val = isNEONModifiedImm(NegatedImm,
4026 SplatUndef.getZExtValue(), SplatBitSize,
4027 DAG, VmovVT, VT.is128BitVector(),
4029 if (Val.getNode()) {
4030 SDValue Vmov = DAG.getNode(ARMISD::VMVNIMM, dl, VmovVT, Val);
4031 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
4034 // Use vmov.f32 to materialize other v2f32 and v4f32 splats.
4035 if ((VT == MVT::v2f32 || VT == MVT::v4f32) && SplatBitSize == 32) {
4036 int ImmVal = ARM_AM::getFP32Imm(SplatBits);
4038 SDValue Val = DAG.getTargetConstant(ImmVal, MVT::i32);
4039 return DAG.getNode(ARMISD::VMOVFPIMM, dl, VT, Val);
4045 // Scan through the operands to see if only one value is used.
4046 unsigned NumElts = VT.getVectorNumElements();
4047 bool isOnlyLowElement = true;
4048 bool usesOnlyOneValue = true;
4049 bool isConstant = true;
4051 for (unsigned i = 0; i < NumElts; ++i) {
4052 SDValue V = Op.getOperand(i);
4053 if (V.getOpcode() == ISD::UNDEF)
4056 isOnlyLowElement = false;
4057 if (!isa<ConstantFPSDNode>(V) && !isa<ConstantSDNode>(V))
4060 if (!Value.getNode())
4062 else if (V != Value)
4063 usesOnlyOneValue = false;
4066 if (!Value.getNode())
4067 return DAG.getUNDEF(VT);
4069 if (isOnlyLowElement)
4070 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Value);
4072 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4074 // Use VDUP for non-constant splats. For f32 constant splats, reduce to
4075 // i32 and try again.
4076 if (usesOnlyOneValue && EltSize <= 32) {
4078 return DAG.getNode(ARMISD::VDUP, dl, VT, Value);
4079 if (VT.getVectorElementType().isFloatingPoint()) {
4080 SmallVector<SDValue, 8> Ops;
4081 for (unsigned i = 0; i < NumElts; ++i)
4082 Ops.push_back(DAG.getNode(ISD::BITCAST, dl, MVT::i32,
4084 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, NumElts);
4085 SDValue Val = DAG.getNode(ISD::BUILD_VECTOR, dl, VecVT, &Ops[0], NumElts);
4086 Val = LowerBUILD_VECTOR(Val, DAG, ST);
4088 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
4090 SDValue Val = IsSingleInstrConstant(Value, DAG, ST, dl);
4092 return DAG.getNode(ARMISD::VDUP, dl, VT, Val);
4095 // If all elements are constants and the case above didn't get hit, fall back
4096 // to the default expansion, which will generate a load from the constant
4101 // Empirical tests suggest this is rarely worth it for vectors of length <= 2.
4103 SDValue shuffle = ReconstructShuffle(Op, DAG);
4104 if (shuffle != SDValue())
4108 // Vectors with 32- or 64-bit elements can be built by directly assigning
4109 // the subregisters. Lower it to an ARMISD::BUILD_VECTOR so the operands
4110 // will be legalized.
4111 if (EltSize >= 32) {
4112 // Do the expansion with floating-point types, since that is what the VFP
4113 // registers are defined to use, and since i64 is not legal.
4114 EVT EltVT = EVT::getFloatingPointVT(EltSize);
4115 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
4116 SmallVector<SDValue, 8> Ops;
4117 for (unsigned i = 0; i < NumElts; ++i)
4118 Ops.push_back(DAG.getNode(ISD::BITCAST, dl, EltVT, Op.getOperand(i)));
4119 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, &Ops[0],NumElts);
4120 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
4126 // Gather data to see if the operation can be modelled as a
4127 // shuffle in combination with VEXTs.
4128 SDValue ARMTargetLowering::ReconstructShuffle(SDValue Op,
4129 SelectionDAG &DAG) const {
4130 DebugLoc dl = Op.getDebugLoc();
4131 EVT VT = Op.getValueType();
4132 unsigned NumElts = VT.getVectorNumElements();
4134 SmallVector<SDValue, 2> SourceVecs;
4135 SmallVector<unsigned, 2> MinElts;
4136 SmallVector<unsigned, 2> MaxElts;
4138 for (unsigned i = 0; i < NumElts; ++i) {
4139 SDValue V = Op.getOperand(i);
4140 if (V.getOpcode() == ISD::UNDEF)
4142 else if (V.getOpcode() != ISD::EXTRACT_VECTOR_ELT) {
4143 // A shuffle can only come from building a vector from various
4144 // elements of other vectors.
4146 } else if (V.getOperand(0).getValueType().getVectorElementType() !=
4147 VT.getVectorElementType()) {
4148 // This code doesn't know how to handle shuffles where the vector
4149 // element types do not match (this happens because type legalization
4150 // promotes the return type of EXTRACT_VECTOR_ELT).
4151 // FIXME: It might be appropriate to extend this code to handle
4152 // mismatched types.
4156 // Record this extraction against the appropriate vector if possible...
4157 SDValue SourceVec = V.getOperand(0);
4158 unsigned EltNo = cast<ConstantSDNode>(V.getOperand(1))->getZExtValue();
4159 bool FoundSource = false;
4160 for (unsigned j = 0; j < SourceVecs.size(); ++j) {
4161 if (SourceVecs[j] == SourceVec) {
4162 if (MinElts[j] > EltNo)
4164 if (MaxElts[j] < EltNo)
4171 // Or record a new source if not...
4173 SourceVecs.push_back(SourceVec);
4174 MinElts.push_back(EltNo);
4175 MaxElts.push_back(EltNo);
4179 // Currently only do something sane when at most two source vectors
4181 if (SourceVecs.size() > 2)
4184 SDValue ShuffleSrcs[2] = {DAG.getUNDEF(VT), DAG.getUNDEF(VT) };
4185 int VEXTOffsets[2] = {0, 0};
4187 // This loop extracts the usage patterns of the source vectors
4188 // and prepares appropriate SDValues for a shuffle if possible.
4189 for (unsigned i = 0; i < SourceVecs.size(); ++i) {
4190 if (SourceVecs[i].getValueType() == VT) {
4191 // No VEXT necessary
4192 ShuffleSrcs[i] = SourceVecs[i];
4195 } else if (SourceVecs[i].getValueType().getVectorNumElements() < NumElts) {
4196 // It probably isn't worth padding out a smaller vector just to
4197 // break it down again in a shuffle.
4201 // Since only 64-bit and 128-bit vectors are legal on ARM and
4202 // we've eliminated the other cases...
4203 assert(SourceVecs[i].getValueType().getVectorNumElements() == 2*NumElts &&
4204 "unexpected vector sizes in ReconstructShuffle");
4206 if (MaxElts[i] - MinElts[i] >= NumElts) {
4207 // Span too large for a VEXT to cope
4211 if (MinElts[i] >= NumElts) {
4212 // The extraction can just take the second half
4213 VEXTOffsets[i] = NumElts;
4214 ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4216 DAG.getIntPtrConstant(NumElts));
4217 } else if (MaxElts[i] < NumElts) {
4218 // The extraction can just take the first half
4220 ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4222 DAG.getIntPtrConstant(0));
4224 // An actual VEXT is needed
4225 VEXTOffsets[i] = MinElts[i];
4226 SDValue VEXTSrc1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4228 DAG.getIntPtrConstant(0));
4229 SDValue VEXTSrc2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4231 DAG.getIntPtrConstant(NumElts));
4232 ShuffleSrcs[i] = DAG.getNode(ARMISD::VEXT, dl, VT, VEXTSrc1, VEXTSrc2,
4233 DAG.getConstant(VEXTOffsets[i], MVT::i32));
4237 SmallVector<int, 8> Mask;
4239 for (unsigned i = 0; i < NumElts; ++i) {
4240 SDValue Entry = Op.getOperand(i);
4241 if (Entry.getOpcode() == ISD::UNDEF) {
4246 SDValue ExtractVec = Entry.getOperand(0);
4247 int ExtractElt = cast<ConstantSDNode>(Op.getOperand(i)
4248 .getOperand(1))->getSExtValue();
4249 if (ExtractVec == SourceVecs[0]) {
4250 Mask.push_back(ExtractElt - VEXTOffsets[0]);
4252 Mask.push_back(ExtractElt + NumElts - VEXTOffsets[1]);
4256 // Final check before we try to produce nonsense...
4257 if (isShuffleMaskLegal(Mask, VT))
4258 return DAG.getVectorShuffle(VT, dl, ShuffleSrcs[0], ShuffleSrcs[1],
4264 /// isShuffleMaskLegal - Targets can use this to indicate that they only
4265 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
4266 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
4267 /// are assumed to be legal.
4269 ARMTargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
4271 if (VT.getVectorNumElements() == 4 &&
4272 (VT.is128BitVector() || VT.is64BitVector())) {
4273 unsigned PFIndexes[4];
4274 for (unsigned i = 0; i != 4; ++i) {
4278 PFIndexes[i] = M[i];
4281 // Compute the index in the perfect shuffle table.
4282 unsigned PFTableIndex =
4283 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
4284 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
4285 unsigned Cost = (PFEntry >> 30);
4292 unsigned Imm, WhichResult;
4294 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4295 return (EltSize >= 32 ||
4296 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
4297 isVREVMask(M, VT, 64) ||
4298 isVREVMask(M, VT, 32) ||
4299 isVREVMask(M, VT, 16) ||
4300 isVEXTMask(M, VT, ReverseVEXT, Imm) ||
4301 isVTBLMask(M, VT) ||
4302 isVTRNMask(M, VT, WhichResult) ||
4303 isVUZPMask(M, VT, WhichResult) ||
4304 isVZIPMask(M, VT, WhichResult) ||
4305 isVTRN_v_undef_Mask(M, VT, WhichResult) ||
4306 isVUZP_v_undef_Mask(M, VT, WhichResult) ||
4307 isVZIP_v_undef_Mask(M, VT, WhichResult));
4310 /// GeneratePerfectShuffle - Given an entry in the perfect-shuffle table, emit
4311 /// the specified operations to build the shuffle.
4312 static SDValue GeneratePerfectShuffle(unsigned PFEntry, SDValue LHS,
4313 SDValue RHS, SelectionDAG &DAG,
4315 unsigned OpNum = (PFEntry >> 26) & 0x0F;
4316 unsigned LHSID = (PFEntry >> 13) & ((1 << 13)-1);
4317 unsigned RHSID = (PFEntry >> 0) & ((1 << 13)-1);
4320 OP_COPY = 0, // Copy, used for things like <u,u,u,3> to say it is <0,1,2,3>
4329 OP_VUZPL, // VUZP, left result
4330 OP_VUZPR, // VUZP, right result
4331 OP_VZIPL, // VZIP, left result
4332 OP_VZIPR, // VZIP, right result
4333 OP_VTRNL, // VTRN, left result
4334 OP_VTRNR // VTRN, right result
4337 if (OpNum == OP_COPY) {
4338 if (LHSID == (1*9+2)*9+3) return LHS;
4339 assert(LHSID == ((4*9+5)*9+6)*9+7 && "Illegal OP_COPY!");
4343 SDValue OpLHS, OpRHS;
4344 OpLHS = GeneratePerfectShuffle(PerfectShuffleTable[LHSID], LHS, RHS, DAG, dl);
4345 OpRHS = GeneratePerfectShuffle(PerfectShuffleTable[RHSID], LHS, RHS, DAG, dl);
4346 EVT VT = OpLHS.getValueType();
4349 default: llvm_unreachable("Unknown shuffle opcode!");
4351 // VREV divides the vector in half and swaps within the half.
4352 if (VT.getVectorElementType() == MVT::i32 ||
4353 VT.getVectorElementType() == MVT::f32)
4354 return DAG.getNode(ARMISD::VREV64, dl, VT, OpLHS);
4355 // vrev <4 x i16> -> VREV32
4356 if (VT.getVectorElementType() == MVT::i16)
4357 return DAG.getNode(ARMISD::VREV32, dl, VT, OpLHS);
4358 // vrev <4 x i8> -> VREV16
4359 assert(VT.getVectorElementType() == MVT::i8);
4360 return DAG.getNode(ARMISD::VREV16, dl, VT, OpLHS);
4365 return DAG.getNode(ARMISD::VDUPLANE, dl, VT,
4366 OpLHS, DAG.getConstant(OpNum-OP_VDUP0, MVT::i32));
4370 return DAG.getNode(ARMISD::VEXT, dl, VT,
4372 DAG.getConstant(OpNum-OP_VEXT1+1, MVT::i32));
4375 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
4376 OpLHS, OpRHS).getValue(OpNum-OP_VUZPL);
4379 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
4380 OpLHS, OpRHS).getValue(OpNum-OP_VZIPL);
4383 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
4384 OpLHS, OpRHS).getValue(OpNum-OP_VTRNL);
4388 static SDValue LowerVECTOR_SHUFFLEv8i8(SDValue Op,
4389 ArrayRef<int> ShuffleMask,
4390 SelectionDAG &DAG) {
4391 // Check to see if we can use the VTBL instruction.
4392 SDValue V1 = Op.getOperand(0);
4393 SDValue V2 = Op.getOperand(1);
4394 DebugLoc DL = Op.getDebugLoc();
4396 SmallVector<SDValue, 8> VTBLMask;
4397 for (ArrayRef<int>::iterator
4398 I = ShuffleMask.begin(), E = ShuffleMask.end(); I != E; ++I)
4399 VTBLMask.push_back(DAG.getConstant(*I, MVT::i32));
4401 if (V2.getNode()->getOpcode() == ISD::UNDEF)
4402 return DAG.getNode(ARMISD::VTBL1, DL, MVT::v8i8, V1,
4403 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8,
4406 return DAG.getNode(ARMISD::VTBL2, DL, MVT::v8i8, V1, V2,
4407 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8,
4411 static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
4412 SDValue V1 = Op.getOperand(0);
4413 SDValue V2 = Op.getOperand(1);
4414 DebugLoc dl = Op.getDebugLoc();
4415 EVT VT = Op.getValueType();
4416 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op.getNode());
4418 // Convert shuffles that are directly supported on NEON to target-specific
4419 // DAG nodes, instead of keeping them as shuffles and matching them again
4420 // during code selection. This is more efficient and avoids the possibility
4421 // of inconsistencies between legalization and selection.
4422 // FIXME: floating-point vectors should be canonicalized to integer vectors
4423 // of the same time so that they get CSEd properly.
4424 ArrayRef<int> ShuffleMask = SVN->getMask();
4426 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4427 if (EltSize <= 32) {
4428 if (ShuffleVectorSDNode::isSplatMask(&ShuffleMask[0], VT)) {
4429 int Lane = SVN->getSplatIndex();
4430 // If this is undef splat, generate it via "just" vdup, if possible.
4431 if (Lane == -1) Lane = 0;
4433 // Test if V1 is a SCALAR_TO_VECTOR.
4434 if (Lane == 0 && V1.getOpcode() == ISD::SCALAR_TO_VECTOR) {
4435 return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
4437 // Test if V1 is a BUILD_VECTOR which is equivalent to a SCALAR_TO_VECTOR
4438 // (and probably will turn into a SCALAR_TO_VECTOR once legalization
4440 if (Lane == 0 && V1.getOpcode() == ISD::BUILD_VECTOR &&
4441 !isa<ConstantSDNode>(V1.getOperand(0))) {
4442 bool IsScalarToVector = true;
4443 for (unsigned i = 1, e = V1.getNumOperands(); i != e; ++i)
4444 if (V1.getOperand(i).getOpcode() != ISD::UNDEF) {
4445 IsScalarToVector = false;
4448 if (IsScalarToVector)
4449 return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
4451 return DAG.getNode(ARMISD::VDUPLANE, dl, VT, V1,
4452 DAG.getConstant(Lane, MVT::i32));
4457 if (isVEXTMask(ShuffleMask, VT, ReverseVEXT, Imm)) {
4460 return DAG.getNode(ARMISD::VEXT, dl, VT, V1, V2,
4461 DAG.getConstant(Imm, MVT::i32));
4464 if (isVREVMask(ShuffleMask, VT, 64))
4465 return DAG.getNode(ARMISD::VREV64, dl, VT, V1);
4466 if (isVREVMask(ShuffleMask, VT, 32))
4467 return DAG.getNode(ARMISD::VREV32, dl, VT, V1);
4468 if (isVREVMask(ShuffleMask, VT, 16))
4469 return DAG.getNode(ARMISD::VREV16, dl, VT, V1);
4471 // Check for Neon shuffles that modify both input vectors in place.
4472 // If both results are used, i.e., if there are two shuffles with the same
4473 // source operands and with masks corresponding to both results of one of
4474 // these operations, DAG memoization will ensure that a single node is
4475 // used for both shuffles.
4476 unsigned WhichResult;
4477 if (isVTRNMask(ShuffleMask, VT, WhichResult))
4478 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
4479 V1, V2).getValue(WhichResult);
4480 if (isVUZPMask(ShuffleMask, VT, WhichResult))
4481 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
4482 V1, V2).getValue(WhichResult);
4483 if (isVZIPMask(ShuffleMask, VT, WhichResult))
4484 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
4485 V1, V2).getValue(WhichResult);
4487 if (isVTRN_v_undef_Mask(ShuffleMask, VT, WhichResult))
4488 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
4489 V1, V1).getValue(WhichResult);
4490 if (isVUZP_v_undef_Mask(ShuffleMask, VT, WhichResult))
4491 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
4492 V1, V1).getValue(WhichResult);
4493 if (isVZIP_v_undef_Mask(ShuffleMask, VT, WhichResult))
4494 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
4495 V1, V1).getValue(WhichResult);
4498 // If the shuffle is not directly supported and it has 4 elements, use
4499 // the PerfectShuffle-generated table to synthesize it from other shuffles.
4500 unsigned NumElts = VT.getVectorNumElements();
4502 unsigned PFIndexes[4];
4503 for (unsigned i = 0; i != 4; ++i) {
4504 if (ShuffleMask[i] < 0)
4507 PFIndexes[i] = ShuffleMask[i];
4510 // Compute the index in the perfect shuffle table.
4511 unsigned PFTableIndex =
4512 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
4513 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
4514 unsigned Cost = (PFEntry >> 30);
4517 return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl);
4520 // Implement shuffles with 32- or 64-bit elements as ARMISD::BUILD_VECTORs.
4521 if (EltSize >= 32) {
4522 // Do the expansion with floating-point types, since that is what the VFP
4523 // registers are defined to use, and since i64 is not legal.
4524 EVT EltVT = EVT::getFloatingPointVT(EltSize);
4525 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
4526 V1 = DAG.getNode(ISD::BITCAST, dl, VecVT, V1);
4527 V2 = DAG.getNode(ISD::BITCAST, dl, VecVT, V2);
4528 SmallVector<SDValue, 8> Ops;
4529 for (unsigned i = 0; i < NumElts; ++i) {
4530 if (ShuffleMask[i] < 0)
4531 Ops.push_back(DAG.getUNDEF(EltVT));
4533 Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT,
4534 ShuffleMask[i] < (int)NumElts ? V1 : V2,
4535 DAG.getConstant(ShuffleMask[i] & (NumElts-1),
4538 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, &Ops[0],NumElts);
4539 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
4542 if (VT == MVT::v8i8) {
4543 SDValue NewOp = LowerVECTOR_SHUFFLEv8i8(Op, ShuffleMask, DAG);
4544 if (NewOp.getNode())
4551 static SDValue LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
4552 // INSERT_VECTOR_ELT is legal only for immediate indexes.
4553 SDValue Lane = Op.getOperand(2);
4554 if (!isa<ConstantSDNode>(Lane))
4560 static SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
4561 // EXTRACT_VECTOR_ELT is legal only for immediate indexes.
4562 SDValue Lane = Op.getOperand(1);
4563 if (!isa<ConstantSDNode>(Lane))
4566 SDValue Vec = Op.getOperand(0);
4567 if (Op.getValueType() == MVT::i32 &&
4568 Vec.getValueType().getVectorElementType().getSizeInBits() < 32) {
4569 DebugLoc dl = Op.getDebugLoc();
4570 return DAG.getNode(ARMISD::VGETLANEu, dl, MVT::i32, Vec, Lane);
4576 static SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
4577 // The only time a CONCAT_VECTORS operation can have legal types is when
4578 // two 64-bit vectors are concatenated to a 128-bit vector.
4579 assert(Op.getValueType().is128BitVector() && Op.getNumOperands() == 2 &&
4580 "unexpected CONCAT_VECTORS");
4581 DebugLoc dl = Op.getDebugLoc();
4582 SDValue Val = DAG.getUNDEF(MVT::v2f64);
4583 SDValue Op0 = Op.getOperand(0);
4584 SDValue Op1 = Op.getOperand(1);
4585 if (Op0.getOpcode() != ISD::UNDEF)
4586 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
4587 DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op0),
4588 DAG.getIntPtrConstant(0));
4589 if (Op1.getOpcode() != ISD::UNDEF)
4590 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
4591 DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op1),
4592 DAG.getIntPtrConstant(1));
4593 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Val);
4596 /// isExtendedBUILD_VECTOR - Check if N is a constant BUILD_VECTOR where each
4597 /// element has been zero/sign-extended, depending on the isSigned parameter,
4598 /// from an integer type half its size.
4599 static bool isExtendedBUILD_VECTOR(SDNode *N, SelectionDAG &DAG,
4601 // A v2i64 BUILD_VECTOR will have been legalized to a BITCAST from v4i32.
4602 EVT VT = N->getValueType(0);
4603 if (VT == MVT::v2i64 && N->getOpcode() == ISD::BITCAST) {
4604 SDNode *BVN = N->getOperand(0).getNode();
4605 if (BVN->getValueType(0) != MVT::v4i32 ||
4606 BVN->getOpcode() != ISD::BUILD_VECTOR)
4608 unsigned LoElt = DAG.getTargetLoweringInfo().isBigEndian() ? 1 : 0;
4609 unsigned HiElt = 1 - LoElt;
4610 ConstantSDNode *Lo0 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt));
4611 ConstantSDNode *Hi0 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt));
4612 ConstantSDNode *Lo1 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt+2));
4613 ConstantSDNode *Hi1 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt+2));
4614 if (!Lo0 || !Hi0 || !Lo1 || !Hi1)
4617 if (Hi0->getSExtValue() == Lo0->getSExtValue() >> 32 &&
4618 Hi1->getSExtValue() == Lo1->getSExtValue() >> 32)
4621 if (Hi0->isNullValue() && Hi1->isNullValue())
4627 if (N->getOpcode() != ISD::BUILD_VECTOR)
4630 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
4631 SDNode *Elt = N->getOperand(i).getNode();
4632 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Elt)) {
4633 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4634 unsigned HalfSize = EltSize / 2;
4636 if (!isIntN(HalfSize, C->getSExtValue()))
4639 if (!isUIntN(HalfSize, C->getZExtValue()))
4650 /// isSignExtended - Check if a node is a vector value that is sign-extended
4651 /// or a constant BUILD_VECTOR with sign-extended elements.
4652 static bool isSignExtended(SDNode *N, SelectionDAG &DAG) {
4653 if (N->getOpcode() == ISD::SIGN_EXTEND || ISD::isSEXTLoad(N))
4655 if (isExtendedBUILD_VECTOR(N, DAG, true))
4660 /// isZeroExtended - Check if a node is a vector value that is zero-extended
4661 /// or a constant BUILD_VECTOR with zero-extended elements.
4662 static bool isZeroExtended(SDNode *N, SelectionDAG &DAG) {
4663 if (N->getOpcode() == ISD::ZERO_EXTEND || ISD::isZEXTLoad(N))
4665 if (isExtendedBUILD_VECTOR(N, DAG, false))
4670 /// SkipExtension - For a node that is a SIGN_EXTEND, ZERO_EXTEND, extending
4671 /// load, or BUILD_VECTOR with extended elements, return the unextended value.
4672 static SDValue SkipExtension(SDNode *N, SelectionDAG &DAG) {
4673 if (N->getOpcode() == ISD::SIGN_EXTEND || N->getOpcode() == ISD::ZERO_EXTEND)
4674 return N->getOperand(0);
4675 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N))
4676 return DAG.getLoad(LD->getMemoryVT(), N->getDebugLoc(), LD->getChain(),
4677 LD->getBasePtr(), LD->getPointerInfo(), LD->isVolatile(),
4678 LD->isNonTemporal(), LD->isInvariant(),
4679 LD->getAlignment());
4680 // Otherwise, the value must be a BUILD_VECTOR. For v2i64, it will
4681 // have been legalized as a BITCAST from v4i32.
4682 if (N->getOpcode() == ISD::BITCAST) {
4683 SDNode *BVN = N->getOperand(0).getNode();
4684 assert(BVN->getOpcode() == ISD::BUILD_VECTOR &&
4685 BVN->getValueType(0) == MVT::v4i32 && "expected v4i32 BUILD_VECTOR");
4686 unsigned LowElt = DAG.getTargetLoweringInfo().isBigEndian() ? 1 : 0;
4687 return DAG.getNode(ISD::BUILD_VECTOR, N->getDebugLoc(), MVT::v2i32,
4688 BVN->getOperand(LowElt), BVN->getOperand(LowElt+2));
4690 // Construct a new BUILD_VECTOR with elements truncated to half the size.
4691 assert(N->getOpcode() == ISD::BUILD_VECTOR && "expected BUILD_VECTOR");
4692 EVT VT = N->getValueType(0);
4693 unsigned EltSize = VT.getVectorElementType().getSizeInBits() / 2;
4694 unsigned NumElts = VT.getVectorNumElements();
4695 MVT TruncVT = MVT::getIntegerVT(EltSize);
4696 SmallVector<SDValue, 8> Ops;
4697 for (unsigned i = 0; i != NumElts; ++i) {
4698 ConstantSDNode *C = cast<ConstantSDNode>(N->getOperand(i));
4699 const APInt &CInt = C->getAPIntValue();
4700 Ops.push_back(DAG.getConstant(CInt.trunc(EltSize), TruncVT));
4702 return DAG.getNode(ISD::BUILD_VECTOR, N->getDebugLoc(),
4703 MVT::getVectorVT(TruncVT, NumElts), Ops.data(), NumElts);
4706 static bool isAddSubSExt(SDNode *N, SelectionDAG &DAG) {
4707 unsigned Opcode = N->getOpcode();
4708 if (Opcode == ISD::ADD || Opcode == ISD::SUB) {
4709 SDNode *N0 = N->getOperand(0).getNode();
4710 SDNode *N1 = N->getOperand(1).getNode();
4711 return N0->hasOneUse() && N1->hasOneUse() &&
4712 isSignExtended(N0, DAG) && isSignExtended(N1, DAG);
4717 static bool isAddSubZExt(SDNode *N, SelectionDAG &DAG) {
4718 unsigned Opcode = N->getOpcode();
4719 if (Opcode == ISD::ADD || Opcode == ISD::SUB) {
4720 SDNode *N0 = N->getOperand(0).getNode();
4721 SDNode *N1 = N->getOperand(1).getNode();
4722 return N0->hasOneUse() && N1->hasOneUse() &&
4723 isZeroExtended(N0, DAG) && isZeroExtended(N1, DAG);
4728 static SDValue LowerMUL(SDValue Op, SelectionDAG &DAG) {
4729 // Multiplications are only custom-lowered for 128-bit vectors so that
4730 // VMULL can be detected. Otherwise v2i64 multiplications are not legal.
4731 EVT VT = Op.getValueType();
4732 assert(VT.is128BitVector() && "unexpected type for custom-lowering ISD::MUL");
4733 SDNode *N0 = Op.getOperand(0).getNode();
4734 SDNode *N1 = Op.getOperand(1).getNode();
4735 unsigned NewOpc = 0;
4737 bool isN0SExt = isSignExtended(N0, DAG);
4738 bool isN1SExt = isSignExtended(N1, DAG);
4739 if (isN0SExt && isN1SExt)
4740 NewOpc = ARMISD::VMULLs;
4742 bool isN0ZExt = isZeroExtended(N0, DAG);
4743 bool isN1ZExt = isZeroExtended(N1, DAG);
4744 if (isN0ZExt && isN1ZExt)
4745 NewOpc = ARMISD::VMULLu;
4746 else if (isN1SExt || isN1ZExt) {
4747 // Look for (s/zext A + s/zext B) * (s/zext C). We want to turn these
4748 // into (s/zext A * s/zext C) + (s/zext B * s/zext C)
4749 if (isN1SExt && isAddSubSExt(N0, DAG)) {
4750 NewOpc = ARMISD::VMULLs;
4752 } else if (isN1ZExt && isAddSubZExt(N0, DAG)) {
4753 NewOpc = ARMISD::VMULLu;
4755 } else if (isN0ZExt && isAddSubZExt(N1, DAG)) {
4757 NewOpc = ARMISD::VMULLu;
4763 if (VT == MVT::v2i64)
4764 // Fall through to expand this. It is not legal.
4767 // Other vector multiplications are legal.
4772 // Legalize to a VMULL instruction.
4773 DebugLoc DL = Op.getDebugLoc();
4775 SDValue Op1 = SkipExtension(N1, DAG);
4777 Op0 = SkipExtension(N0, DAG);
4778 assert(Op0.getValueType().is64BitVector() &&
4779 Op1.getValueType().is64BitVector() &&
4780 "unexpected types for extended operands to VMULL");
4781 return DAG.getNode(NewOpc, DL, VT, Op0, Op1);
4784 // Optimizing (zext A + zext B) * C, to (VMULL A, C) + (VMULL B, C) during
4785 // isel lowering to take advantage of no-stall back to back vmul + vmla.
4792 SDValue N00 = SkipExtension(N0->getOperand(0).getNode(), DAG);
4793 SDValue N01 = SkipExtension(N0->getOperand(1).getNode(), DAG);
4794 EVT Op1VT = Op1.getValueType();
4795 return DAG.getNode(N0->getOpcode(), DL, VT,
4796 DAG.getNode(NewOpc, DL, VT,
4797 DAG.getNode(ISD::BITCAST, DL, Op1VT, N00), Op1),
4798 DAG.getNode(NewOpc, DL, VT,
4799 DAG.getNode(ISD::BITCAST, DL, Op1VT, N01), Op1));
4803 LowerSDIV_v4i8(SDValue X, SDValue Y, DebugLoc dl, SelectionDAG &DAG) {
4805 // float4 xf = vcvt_f32_s32(vmovl_s16(a.lo));
4806 // float4 yf = vcvt_f32_s32(vmovl_s16(b.lo));
4807 X = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, X);
4808 Y = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, Y);
4809 X = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, X);
4810 Y = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, Y);
4811 // Get reciprocal estimate.
4812 // float4 recip = vrecpeq_f32(yf);
4813 Y = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4814 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), Y);
4815 // Because char has a smaller range than uchar, we can actually get away
4816 // without any newton steps. This requires that we use a weird bias
4817 // of 0xb000, however (again, this has been exhaustively tested).
4818 // float4 result = as_float4(as_int4(xf*recip) + 0xb000);
4819 X = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, X, Y);
4820 X = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, X);
4821 Y = DAG.getConstant(0xb000, MVT::i32);
4822 Y = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Y, Y, Y, Y);
4823 X = DAG.getNode(ISD::ADD, dl, MVT::v4i32, X, Y);
4824 X = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, X);
4825 // Convert back to short.
4826 X = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, X);
4827 X = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, X);
4832 LowerSDIV_v4i16(SDValue N0, SDValue N1, DebugLoc dl, SelectionDAG &DAG) {
4834 // Convert to float.
4835 // float4 yf = vcvt_f32_s32(vmovl_s16(y));
4836 // float4 xf = vcvt_f32_s32(vmovl_s16(x));
4837 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N0);
4838 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N1);
4839 N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0);
4840 N1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1);
4842 // Use reciprocal estimate and one refinement step.
4843 // float4 recip = vrecpeq_f32(yf);
4844 // recip *= vrecpsq_f32(yf, recip);
4845 N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4846 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), N1);
4847 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4848 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
4850 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
4851 // Because short has a smaller range than ushort, we can actually get away
4852 // with only a single newton step. This requires that we use a weird bias
4853 // of 89, however (again, this has been exhaustively tested).
4854 // float4 result = as_float4(as_int4(xf*recip) + 0x89);
4855 N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2);
4856 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0);
4857 N1 = DAG.getConstant(0x89, MVT::i32);
4858 N1 = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, N1, N1, N1, N1);
4859 N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1);
4860 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0);
4861 // Convert back to integer and return.
4862 // return vmovn_s32(vcvt_s32_f32(result));
4863 N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0);
4864 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0);
4868 static SDValue LowerSDIV(SDValue Op, SelectionDAG &DAG) {
4869 EVT VT = Op.getValueType();
4870 assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&
4871 "unexpected type for custom-lowering ISD::SDIV");
4873 DebugLoc dl = Op.getDebugLoc();
4874 SDValue N0 = Op.getOperand(0);
4875 SDValue N1 = Op.getOperand(1);
4878 if (VT == MVT::v8i8) {
4879 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N0);
4880 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N1);
4882 N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
4883 DAG.getIntPtrConstant(4));
4884 N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
4885 DAG.getIntPtrConstant(4));
4886 N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
4887 DAG.getIntPtrConstant(0));
4888 N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
4889 DAG.getIntPtrConstant(0));
4891 N0 = LowerSDIV_v4i8(N0, N1, dl, DAG); // v4i16
4892 N2 = LowerSDIV_v4i8(N2, N3, dl, DAG); // v4i16
4894 N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2);
4895 N0 = LowerCONCAT_VECTORS(N0, DAG);
4897 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v8i8, N0);
4900 return LowerSDIV_v4i16(N0, N1, dl, DAG);
4903 static SDValue LowerUDIV(SDValue Op, SelectionDAG &DAG) {
4904 EVT VT = Op.getValueType();
4905 assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&
4906 "unexpected type for custom-lowering ISD::UDIV");
4908 DebugLoc dl = Op.getDebugLoc();
4909 SDValue N0 = Op.getOperand(0);
4910 SDValue N1 = Op.getOperand(1);
4913 if (VT == MVT::v8i8) {
4914 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N0);
4915 N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N1);
4917 N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
4918 DAG.getIntPtrConstant(4));
4919 N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
4920 DAG.getIntPtrConstant(4));
4921 N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
4922 DAG.getIntPtrConstant(0));
4923 N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
4924 DAG.getIntPtrConstant(0));
4926 N0 = LowerSDIV_v4i16(N0, N1, dl, DAG); // v4i16
4927 N2 = LowerSDIV_v4i16(N2, N3, dl, DAG); // v4i16
4929 N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2);
4930 N0 = LowerCONCAT_VECTORS(N0, DAG);
4932 N0 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v8i8,
4933 DAG.getConstant(Intrinsic::arm_neon_vqmovnsu, MVT::i32),
4938 // v4i16 sdiv ... Convert to float.
4939 // float4 yf = vcvt_f32_s32(vmovl_u16(y));
4940 // float4 xf = vcvt_f32_s32(vmovl_u16(x));
4941 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N0);
4942 N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N1);
4943 N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0);
4944 SDValue BN1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1);
4946 // Use reciprocal estimate and two refinement steps.
4947 // float4 recip = vrecpeq_f32(yf);
4948 // recip *= vrecpsq_f32(yf, recip);
4949 // recip *= vrecpsq_f32(yf, recip);
4950 N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4951 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), BN1);
4952 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4953 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
4955 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
4956 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4957 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
4959 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
4960 // Simply multiplying by the reciprocal estimate can leave us a few ulps
4961 // too low, so we add 2 ulps (exhaustive testing shows that this is enough,
4962 // and that it will never cause us to return an answer too large).
4963 // float4 result = as_float4(as_int4(xf*recip) + 2);
4964 N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2);
4965 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0);
4966 N1 = DAG.getConstant(2, MVT::i32);
4967 N1 = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, N1, N1, N1, N1);
4968 N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1);
4969 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0);
4970 // Convert back to integer and return.
4971 // return vmovn_u32(vcvt_s32_f32(result));
4972 N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0);
4973 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0);
4977 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
4978 EVT VT = Op.getNode()->getValueType(0);
4979 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
4982 bool ExtraOp = false;
4983 switch (Op.getOpcode()) {
4984 default: llvm_unreachable("Invalid code");
4985 case ISD::ADDC: Opc = ARMISD::ADDC; break;
4986 case ISD::ADDE: Opc = ARMISD::ADDE; ExtraOp = true; break;
4987 case ISD::SUBC: Opc = ARMISD::SUBC; break;
4988 case ISD::SUBE: Opc = ARMISD::SUBE; ExtraOp = true; break;
4992 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
4994 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
4995 Op.getOperand(1), Op.getOperand(2));
4998 static SDValue LowerAtomicLoadStore(SDValue Op, SelectionDAG &DAG) {
4999 // Monotonic load/store is legal for all targets
5000 if (cast<AtomicSDNode>(Op)->getOrdering() <= Monotonic)
5003 // Aquire/Release load/store is not legal for targets without a
5004 // dmb or equivalent available.
5010 ReplaceATOMIC_OP_64(SDNode *Node, SmallVectorImpl<SDValue>& Results,
5011 SelectionDAG &DAG, unsigned NewOp) {
5012 DebugLoc dl = Node->getDebugLoc();
5013 assert (Node->getValueType(0) == MVT::i64 &&
5014 "Only know how to expand i64 atomics");
5016 SmallVector<SDValue, 6> Ops;
5017 Ops.push_back(Node->getOperand(0)); // Chain
5018 Ops.push_back(Node->getOperand(1)); // Ptr
5020 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5021 Node->getOperand(2), DAG.getIntPtrConstant(0)));
5022 // High part of Val1
5023 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5024 Node->getOperand(2), DAG.getIntPtrConstant(1)));
5025 if (NewOp == ARMISD::ATOMCMPXCHG64_DAG) {
5026 // High part of Val1
5027 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5028 Node->getOperand(3), DAG.getIntPtrConstant(0)));
5029 // High part of Val2
5030 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5031 Node->getOperand(3), DAG.getIntPtrConstant(1)));
5033 SDVTList Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
5035 DAG.getMemIntrinsicNode(NewOp, dl, Tys, Ops.data(), Ops.size(), MVT::i64,
5036 cast<MemSDNode>(Node)->getMemOperand());
5037 SDValue OpsF[] = { Result.getValue(0), Result.getValue(1) };
5038 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
5039 Results.push_back(Result.getValue(2));
5042 SDValue ARMTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
5043 switch (Op.getOpcode()) {
5044 default: llvm_unreachable("Don't know how to custom lower this!");
5045 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
5046 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
5047 case ISD::GlobalAddress:
5048 return Subtarget->isTargetDarwin() ? LowerGlobalAddressDarwin(Op, DAG) :
5049 LowerGlobalAddressELF(Op, DAG);
5050 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
5051 case ISD::SELECT: return LowerSELECT(Op, DAG);
5052 case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
5053 case ISD::BR_CC: return LowerBR_CC(Op, DAG);
5054 case ISD::BR_JT: return LowerBR_JT(Op, DAG);
5055 case ISD::VASTART: return LowerVASTART(Op, DAG);
5056 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op, DAG, Subtarget);
5057 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG, Subtarget);
5058 case ISD::PREFETCH: return LowerPREFETCH(Op, DAG, Subtarget);
5059 case ISD::SINT_TO_FP:
5060 case ISD::UINT_TO_FP: return LowerINT_TO_FP(Op, DAG);
5061 case ISD::FP_TO_SINT:
5062 case ISD::FP_TO_UINT: return LowerFP_TO_INT(Op, DAG);
5063 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
5064 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
5065 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
5066 case ISD::GLOBAL_OFFSET_TABLE: return LowerGLOBAL_OFFSET_TABLE(Op, DAG);
5067 case ISD::EH_SJLJ_SETJMP: return LowerEH_SJLJ_SETJMP(Op, DAG);
5068 case ISD::EH_SJLJ_LONGJMP: return LowerEH_SJLJ_LONGJMP(Op, DAG);
5069 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG,
5071 case ISD::BITCAST: return ExpandBITCAST(Op.getNode(), DAG);
5074 case ISD::SRA: return LowerShift(Op.getNode(), DAG, Subtarget);
5075 case ISD::SHL_PARTS: return LowerShiftLeftParts(Op, DAG);
5076 case ISD::SRL_PARTS:
5077 case ISD::SRA_PARTS: return LowerShiftRightParts(Op, DAG);
5078 case ISD::CTTZ: return LowerCTTZ(Op.getNode(), DAG, Subtarget);
5079 case ISD::SETCC: return LowerVSETCC(Op, DAG);
5080 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG, Subtarget);
5081 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
5082 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
5083 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
5084 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
5085 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
5086 case ISD::MUL: return LowerMUL(Op, DAG);
5087 case ISD::SDIV: return LowerSDIV(Op, DAG);
5088 case ISD::UDIV: return LowerUDIV(Op, DAG);
5092 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
5093 case ISD::ATOMIC_LOAD:
5094 case ISD::ATOMIC_STORE: return LowerAtomicLoadStore(Op, DAG);
5098 /// ReplaceNodeResults - Replace the results of node with an illegal result
5099 /// type with new values built out of custom code.
5100 void ARMTargetLowering::ReplaceNodeResults(SDNode *N,
5101 SmallVectorImpl<SDValue>&Results,
5102 SelectionDAG &DAG) const {
5104 switch (N->getOpcode()) {
5106 llvm_unreachable("Don't know how to custom expand this!");
5108 Res = ExpandBITCAST(N, DAG);
5112 Res = Expand64BitShift(N, DAG, Subtarget);
5114 case ISD::ATOMIC_LOAD_ADD:
5115 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMADD64_DAG);
5117 case ISD::ATOMIC_LOAD_AND:
5118 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMAND64_DAG);
5120 case ISD::ATOMIC_LOAD_NAND:
5121 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMNAND64_DAG);
5123 case ISD::ATOMIC_LOAD_OR:
5124 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMOR64_DAG);
5126 case ISD::ATOMIC_LOAD_SUB:
5127 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMSUB64_DAG);
5129 case ISD::ATOMIC_LOAD_XOR:
5130 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMXOR64_DAG);
5132 case ISD::ATOMIC_SWAP:
5133 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMSWAP64_DAG);
5135 case ISD::ATOMIC_CMP_SWAP:
5136 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMCMPXCHG64_DAG);
5140 Results.push_back(Res);
5143 //===----------------------------------------------------------------------===//
5144 // ARM Scheduler Hooks
5145 //===----------------------------------------------------------------------===//
5148 ARMTargetLowering::EmitAtomicCmpSwap(MachineInstr *MI,
5149 MachineBasicBlock *BB,
5150 unsigned Size) const {
5151 unsigned dest = MI->getOperand(0).getReg();
5152 unsigned ptr = MI->getOperand(1).getReg();
5153 unsigned oldval = MI->getOperand(2).getReg();
5154 unsigned newval = MI->getOperand(3).getReg();
5155 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5156 DebugLoc dl = MI->getDebugLoc();
5157 bool isThumb2 = Subtarget->isThumb2();
5159 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5161 MRI.createVirtualRegister(isThumb2 ? ARM::rGPRRegisterClass
5162 : ARM::GPRRegisterClass);
5165 MRI.constrainRegClass(dest, ARM::rGPRRegisterClass);
5166 MRI.constrainRegClass(oldval, ARM::rGPRRegisterClass);
5167 MRI.constrainRegClass(newval, ARM::rGPRRegisterClass);
5170 unsigned ldrOpc, strOpc;
5172 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
5174 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
5175 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
5178 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
5179 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
5182 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
5183 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
5187 MachineFunction *MF = BB->getParent();
5188 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5189 MachineFunction::iterator It = BB;
5190 ++It; // insert the new blocks after the current block
5192 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
5193 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
5194 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5195 MF->insert(It, loop1MBB);
5196 MF->insert(It, loop2MBB);
5197 MF->insert(It, exitMBB);
5199 // Transfer the remainder of BB and its successor edges to exitMBB.
5200 exitMBB->splice(exitMBB->begin(), BB,
5201 llvm::next(MachineBasicBlock::iterator(MI)),
5203 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5207 // fallthrough --> loop1MBB
5208 BB->addSuccessor(loop1MBB);
5211 // ldrex dest, [ptr]
5215 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr);
5216 if (ldrOpc == ARM::t2LDREX)
5218 AddDefaultPred(MIB);
5219 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
5220 .addReg(dest).addReg(oldval));
5221 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5222 .addMBB(exitMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5223 BB->addSuccessor(loop2MBB);
5224 BB->addSuccessor(exitMBB);
5227 // strex scratch, newval, [ptr]
5231 MIB = BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(newval).addReg(ptr);
5232 if (strOpc == ARM::t2STREX)
5234 AddDefaultPred(MIB);
5235 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5236 .addReg(scratch).addImm(0));
5237 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5238 .addMBB(loop1MBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5239 BB->addSuccessor(loop1MBB);
5240 BB->addSuccessor(exitMBB);
5246 MI->eraseFromParent(); // The instruction is gone now.
5252 ARMTargetLowering::EmitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
5253 unsigned Size, unsigned BinOpcode) const {
5254 // This also handles ATOMIC_SWAP, indicated by BinOpcode==0.
5255 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5257 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5258 MachineFunction *MF = BB->getParent();
5259 MachineFunction::iterator It = BB;
5262 unsigned dest = MI->getOperand(0).getReg();
5263 unsigned ptr = MI->getOperand(1).getReg();
5264 unsigned incr = MI->getOperand(2).getReg();
5265 DebugLoc dl = MI->getDebugLoc();
5266 bool isThumb2 = Subtarget->isThumb2();
5268 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5270 MRI.constrainRegClass(dest, ARM::rGPRRegisterClass);
5271 MRI.constrainRegClass(ptr, ARM::rGPRRegisterClass);
5274 unsigned ldrOpc, strOpc;
5276 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
5278 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
5279 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
5282 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
5283 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
5286 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
5287 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
5291 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5292 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5293 MF->insert(It, loopMBB);
5294 MF->insert(It, exitMBB);
5296 // Transfer the remainder of BB and its successor edges to exitMBB.
5297 exitMBB->splice(exitMBB->begin(), BB,
5298 llvm::next(MachineBasicBlock::iterator(MI)),
5300 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5302 const TargetRegisterClass *TRC =
5303 isThumb2 ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
5304 unsigned scratch = MRI.createVirtualRegister(TRC);
5305 unsigned scratch2 = (!BinOpcode) ? incr : MRI.createVirtualRegister(TRC);
5309 // fallthrough --> loopMBB
5310 BB->addSuccessor(loopMBB);
5314 // <binop> scratch2, dest, incr
5315 // strex scratch, scratch2, ptr
5318 // fallthrough --> exitMBB
5320 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr);
5321 if (ldrOpc == ARM::t2LDREX)
5323 AddDefaultPred(MIB);
5325 // operand order needs to go the other way for NAND
5326 if (BinOpcode == ARM::BICrr || BinOpcode == ARM::t2BICrr)
5327 AddDefaultPred(BuildMI(BB, dl, TII->get(BinOpcode), scratch2).
5328 addReg(incr).addReg(dest)).addReg(0);
5330 AddDefaultPred(BuildMI(BB, dl, TII->get(BinOpcode), scratch2).
5331 addReg(dest).addReg(incr)).addReg(0);
5334 MIB = BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(scratch2).addReg(ptr);
5335 if (strOpc == ARM::t2STREX)
5337 AddDefaultPred(MIB);
5338 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5339 .addReg(scratch).addImm(0));
5340 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5341 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5343 BB->addSuccessor(loopMBB);
5344 BB->addSuccessor(exitMBB);
5350 MI->eraseFromParent(); // The instruction is gone now.
5356 ARMTargetLowering::EmitAtomicBinaryMinMax(MachineInstr *MI,
5357 MachineBasicBlock *BB,
5360 ARMCC::CondCodes Cond) const {
5361 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5363 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5364 MachineFunction *MF = BB->getParent();
5365 MachineFunction::iterator It = BB;
5368 unsigned dest = MI->getOperand(0).getReg();
5369 unsigned ptr = MI->getOperand(1).getReg();
5370 unsigned incr = MI->getOperand(2).getReg();
5371 unsigned oldval = dest;
5372 DebugLoc dl = MI->getDebugLoc();
5373 bool isThumb2 = Subtarget->isThumb2();
5375 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5377 MRI.constrainRegClass(dest, ARM::rGPRRegisterClass);
5378 MRI.constrainRegClass(ptr, ARM::rGPRRegisterClass);
5381 unsigned ldrOpc, strOpc, extendOpc;
5383 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
5385 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
5386 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
5387 extendOpc = isThumb2 ? ARM::t2SXTB : ARM::SXTB;
5390 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
5391 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
5392 extendOpc = isThumb2 ? ARM::t2SXTH : ARM::SXTH;
5395 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
5396 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
5401 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5402 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5403 MF->insert(It, loopMBB);
5404 MF->insert(It, exitMBB);
5406 // Transfer the remainder of BB and its successor edges to exitMBB.
5407 exitMBB->splice(exitMBB->begin(), BB,
5408 llvm::next(MachineBasicBlock::iterator(MI)),
5410 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5412 const TargetRegisterClass *TRC =
5413 isThumb2 ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
5414 unsigned scratch = MRI.createVirtualRegister(TRC);
5415 unsigned scratch2 = MRI.createVirtualRegister(TRC);
5419 // fallthrough --> loopMBB
5420 BB->addSuccessor(loopMBB);
5424 // (sign extend dest, if required)
5426 // cmov.cond scratch2, dest, incr
5427 // strex scratch, scratch2, ptr
5430 // fallthrough --> exitMBB
5432 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr);
5433 if (ldrOpc == ARM::t2LDREX)
5435 AddDefaultPred(MIB);
5437 // Sign extend the value, if necessary.
5438 if (signExtend && extendOpc) {
5439 oldval = MRI.createVirtualRegister(ARM::GPRRegisterClass);
5440 AddDefaultPred(BuildMI(BB, dl, TII->get(extendOpc), oldval)
5445 // Build compare and cmov instructions.
5446 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
5447 .addReg(oldval).addReg(incr));
5448 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2MOVCCr : ARM::MOVCCr), scratch2)
5449 .addReg(oldval).addReg(incr).addImm(Cond).addReg(ARM::CPSR);
5451 MIB = BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(scratch2).addReg(ptr);
5452 if (strOpc == ARM::t2STREX)
5454 AddDefaultPred(MIB);
5455 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5456 .addReg(scratch).addImm(0));
5457 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5458 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5460 BB->addSuccessor(loopMBB);
5461 BB->addSuccessor(exitMBB);
5467 MI->eraseFromParent(); // The instruction is gone now.
5473 ARMTargetLowering::EmitAtomicBinary64(MachineInstr *MI, MachineBasicBlock *BB,
5474 unsigned Op1, unsigned Op2,
5475 bool NeedsCarry, bool IsCmpxchg) const {
5476 // This also handles ATOMIC_SWAP, indicated by Op1==0.
5477 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5479 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5480 MachineFunction *MF = BB->getParent();
5481 MachineFunction::iterator It = BB;
5484 unsigned destlo = MI->getOperand(0).getReg();
5485 unsigned desthi = MI->getOperand(1).getReg();
5486 unsigned ptr = MI->getOperand(2).getReg();
5487 unsigned vallo = MI->getOperand(3).getReg();
5488 unsigned valhi = MI->getOperand(4).getReg();
5489 DebugLoc dl = MI->getDebugLoc();
5490 bool isThumb2 = Subtarget->isThumb2();
5492 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5494 MRI.constrainRegClass(destlo, ARM::rGPRRegisterClass);
5495 MRI.constrainRegClass(desthi, ARM::rGPRRegisterClass);
5496 MRI.constrainRegClass(ptr, ARM::rGPRRegisterClass);
5499 unsigned ldrOpc = isThumb2 ? ARM::t2LDREXD : ARM::LDREXD;
5500 unsigned strOpc = isThumb2 ? ARM::t2STREXD : ARM::STREXD;
5502 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5503 MachineBasicBlock *contBB = 0, *cont2BB = 0;
5505 contBB = MF->CreateMachineBasicBlock(LLVM_BB);
5506 cont2BB = MF->CreateMachineBasicBlock(LLVM_BB);
5508 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5509 MF->insert(It, loopMBB);
5511 MF->insert(It, contBB);
5512 MF->insert(It, cont2BB);
5514 MF->insert(It, exitMBB);
5516 // Transfer the remainder of BB and its successor edges to exitMBB.
5517 exitMBB->splice(exitMBB->begin(), BB,
5518 llvm::next(MachineBasicBlock::iterator(MI)),
5520 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5522 const TargetRegisterClass *TRC =
5523 isThumb2 ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
5524 unsigned storesuccess = MRI.createVirtualRegister(TRC);
5528 // fallthrough --> loopMBB
5529 BB->addSuccessor(loopMBB);
5532 // ldrexd r2, r3, ptr
5533 // <binopa> r0, r2, incr
5534 // <binopb> r1, r3, incr
5535 // strexd storesuccess, r0, r1, ptr
5536 // cmp storesuccess, #0
5538 // fallthrough --> exitMBB
5540 // Note that the registers are explicitly specified because there is not any
5541 // way to force the register allocator to allocate a register pair.
5543 // FIXME: The hardcoded registers are not necessary for Thumb2, but we
5544 // need to properly enforce the restriction that the two output registers
5545 // for ldrexd must be different.
5548 AddDefaultPred(BuildMI(BB, dl, TII->get(ldrOpc))
5549 .addReg(ARM::R2, RegState::Define)
5550 .addReg(ARM::R3, RegState::Define).addReg(ptr));
5551 // Copy r2/r3 into dest. (This copy will normally be coalesced.)
5552 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), destlo).addReg(ARM::R2);
5553 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), desthi).addReg(ARM::R3);
5557 for (unsigned i = 0; i < 2; i++) {
5558 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr :
5560 .addReg(i == 0 ? destlo : desthi)
5561 .addReg(i == 0 ? vallo : valhi));
5562 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5563 .addMBB(exitMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5564 BB->addSuccessor(exitMBB);
5565 BB->addSuccessor(i == 0 ? contBB : cont2BB);
5566 BB = (i == 0 ? contBB : cont2BB);
5569 // Copy to physregs for strexd
5570 unsigned setlo = MI->getOperand(5).getReg();
5571 unsigned sethi = MI->getOperand(6).getReg();
5572 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R0).addReg(setlo);
5573 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R1).addReg(sethi);
5575 // Perform binary operation
5576 AddDefaultPred(BuildMI(BB, dl, TII->get(Op1), ARM::R0)
5577 .addReg(destlo).addReg(vallo))
5578 .addReg(NeedsCarry ? ARM::CPSR : 0, getDefRegState(NeedsCarry));
5579 AddDefaultPred(BuildMI(BB, dl, TII->get(Op2), ARM::R1)
5580 .addReg(desthi).addReg(valhi)).addReg(0);
5582 // Copy to physregs for strexd
5583 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R0).addReg(vallo);
5584 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R1).addReg(valhi);
5588 AddDefaultPred(BuildMI(BB, dl, TII->get(strOpc), storesuccess)
5589 .addReg(ARM::R0).addReg(ARM::R1).addReg(ptr));
5591 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5592 .addReg(storesuccess).addImm(0));
5593 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5594 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5596 BB->addSuccessor(loopMBB);
5597 BB->addSuccessor(exitMBB);
5603 MI->eraseFromParent(); // The instruction is gone now.
5608 /// SetupEntryBlockForSjLj - Insert code into the entry block that creates and
5609 /// registers the function context.
5610 void ARMTargetLowering::
5611 SetupEntryBlockForSjLj(MachineInstr *MI, MachineBasicBlock *MBB,
5612 MachineBasicBlock *DispatchBB, int FI) const {
5613 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5614 DebugLoc dl = MI->getDebugLoc();
5615 MachineFunction *MF = MBB->getParent();
5616 MachineRegisterInfo *MRI = &MF->getRegInfo();
5617 MachineConstantPool *MCP = MF->getConstantPool();
5618 ARMFunctionInfo *AFI = MF->getInfo<ARMFunctionInfo>();
5619 const Function *F = MF->getFunction();
5621 bool isThumb = Subtarget->isThumb();
5622 bool isThumb2 = Subtarget->isThumb2();
5624 unsigned PCLabelId = AFI->createPICLabelUId();
5625 unsigned PCAdj = (isThumb || isThumb2) ? 4 : 8;
5626 ARMConstantPoolValue *CPV =
5627 ARMConstantPoolMBB::Create(F->getContext(), DispatchBB, PCLabelId, PCAdj);
5628 unsigned CPI = MCP->getConstantPoolIndex(CPV, 4);
5630 const TargetRegisterClass *TRC =
5631 isThumb ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
5633 // Grab constant pool and fixed stack memory operands.
5634 MachineMemOperand *CPMMO =
5635 MF->getMachineMemOperand(MachinePointerInfo::getConstantPool(),
5636 MachineMemOperand::MOLoad, 4, 4);
5638 MachineMemOperand *FIMMOSt =
5639 MF->getMachineMemOperand(MachinePointerInfo::getFixedStack(FI),
5640 MachineMemOperand::MOStore, 4, 4);
5642 // Load the address of the dispatch MBB into the jump buffer.
5644 // Incoming value: jbuf
5645 // ldr.n r5, LCPI1_1
5648 // str r5, [$jbuf, #+4] ; &jbuf[1]
5649 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5650 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2LDRpci), NewVReg1)
5651 .addConstantPoolIndex(CPI)
5652 .addMemOperand(CPMMO));
5653 // Set the low bit because of thumb mode.
5654 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
5656 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2ORRri), NewVReg2)
5657 .addReg(NewVReg1, RegState::Kill)
5659 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
5660 BuildMI(*MBB, MI, dl, TII->get(ARM::tPICADD), NewVReg3)
5661 .addReg(NewVReg2, RegState::Kill)
5663 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2STRi12))
5664 .addReg(NewVReg3, RegState::Kill)
5666 .addImm(36) // &jbuf[1] :: pc
5667 .addMemOperand(FIMMOSt));
5668 } else if (isThumb) {
5669 // Incoming value: jbuf
5670 // ldr.n r1, LCPI1_4
5674 // add r2, $jbuf, #+4 ; &jbuf[1]
5676 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5677 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tLDRpci), NewVReg1)
5678 .addConstantPoolIndex(CPI)
5679 .addMemOperand(CPMMO));
5680 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
5681 BuildMI(*MBB, MI, dl, TII->get(ARM::tPICADD), NewVReg2)
5682 .addReg(NewVReg1, RegState::Kill)
5684 // Set the low bit because of thumb mode.
5685 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
5686 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tMOVi8), NewVReg3)
5687 .addReg(ARM::CPSR, RegState::Define)
5689 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
5690 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tORR), NewVReg4)
5691 .addReg(ARM::CPSR, RegState::Define)
5692 .addReg(NewVReg2, RegState::Kill)
5693 .addReg(NewVReg3, RegState::Kill));
5694 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
5695 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tADDrSPi), NewVReg5)
5697 .addImm(36)); // &jbuf[1] :: pc
5698 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tSTRi))
5699 .addReg(NewVReg4, RegState::Kill)
5700 .addReg(NewVReg5, RegState::Kill)
5702 .addMemOperand(FIMMOSt));
5704 // Incoming value: jbuf
5707 // str r1, [$jbuf, #+4] ; &jbuf[1]
5708 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5709 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::LDRi12), NewVReg1)
5710 .addConstantPoolIndex(CPI)
5712 .addMemOperand(CPMMO));
5713 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
5714 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::PICADD), NewVReg2)
5715 .addReg(NewVReg1, RegState::Kill)
5716 .addImm(PCLabelId));
5717 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::STRi12))
5718 .addReg(NewVReg2, RegState::Kill)
5720 .addImm(36) // &jbuf[1] :: pc
5721 .addMemOperand(FIMMOSt));
5725 MachineBasicBlock *ARMTargetLowering::
5726 EmitSjLjDispatchBlock(MachineInstr *MI, MachineBasicBlock *MBB) const {
5727 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5728 DebugLoc dl = MI->getDebugLoc();
5729 MachineFunction *MF = MBB->getParent();
5730 MachineRegisterInfo *MRI = &MF->getRegInfo();
5731 ARMFunctionInfo *AFI = MF->getInfo<ARMFunctionInfo>();
5732 MachineFrameInfo *MFI = MF->getFrameInfo();
5733 int FI = MFI->getFunctionContextIndex();
5735 const TargetRegisterClass *TRC =
5736 Subtarget->isThumb() ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
5738 // Get a mapping of the call site numbers to all of the landing pads they're
5740 DenseMap<unsigned, SmallVector<MachineBasicBlock*, 2> > CallSiteNumToLPad;
5741 unsigned MaxCSNum = 0;
5742 MachineModuleInfo &MMI = MF->getMMI();
5743 for (MachineFunction::iterator BB = MF->begin(), E = MF->end(); BB != E; ++BB) {
5744 if (!BB->isLandingPad()) continue;
5746 // FIXME: We should assert that the EH_LABEL is the first MI in the landing
5748 for (MachineBasicBlock::iterator
5749 II = BB->begin(), IE = BB->end(); II != IE; ++II) {
5750 if (!II->isEHLabel()) continue;
5752 MCSymbol *Sym = II->getOperand(0).getMCSymbol();
5753 if (!MMI.hasCallSiteLandingPad(Sym)) continue;
5755 SmallVectorImpl<unsigned> &CallSiteIdxs = MMI.getCallSiteLandingPad(Sym);
5756 for (SmallVectorImpl<unsigned>::iterator
5757 CSI = CallSiteIdxs.begin(), CSE = CallSiteIdxs.end();
5758 CSI != CSE; ++CSI) {
5759 CallSiteNumToLPad[*CSI].push_back(BB);
5760 MaxCSNum = std::max(MaxCSNum, *CSI);
5766 // Get an ordered list of the machine basic blocks for the jump table.
5767 std::vector<MachineBasicBlock*> LPadList;
5768 SmallPtrSet<MachineBasicBlock*, 64> InvokeBBs;
5769 LPadList.reserve(CallSiteNumToLPad.size());
5770 for (unsigned I = 1; I <= MaxCSNum; ++I) {
5771 SmallVectorImpl<MachineBasicBlock*> &MBBList = CallSiteNumToLPad[I];
5772 for (SmallVectorImpl<MachineBasicBlock*>::iterator
5773 II = MBBList.begin(), IE = MBBList.end(); II != IE; ++II) {
5774 LPadList.push_back(*II);
5775 InvokeBBs.insert((*II)->pred_begin(), (*II)->pred_end());
5779 assert(!LPadList.empty() &&
5780 "No landing pad destinations for the dispatch jump table!");
5782 // Create the jump table and associated information.
5783 MachineJumpTableInfo *JTI =
5784 MF->getOrCreateJumpTableInfo(MachineJumpTableInfo::EK_Inline);
5785 unsigned MJTI = JTI->createJumpTableIndex(LPadList);
5786 unsigned UId = AFI->createJumpTableUId();
5788 // Create the MBBs for the dispatch code.
5790 // Shove the dispatch's address into the return slot in the function context.
5791 MachineBasicBlock *DispatchBB = MF->CreateMachineBasicBlock();
5792 DispatchBB->setIsLandingPad();
5794 MachineBasicBlock *TrapBB = MF->CreateMachineBasicBlock();
5795 BuildMI(TrapBB, dl, TII->get(Subtarget->isThumb() ? ARM::tTRAP : ARM::TRAP));
5796 DispatchBB->addSuccessor(TrapBB);
5798 MachineBasicBlock *DispContBB = MF->CreateMachineBasicBlock();
5799 DispatchBB->addSuccessor(DispContBB);
5802 MF->insert(MF->end(), DispatchBB);
5803 MF->insert(MF->end(), DispContBB);
5804 MF->insert(MF->end(), TrapBB);
5806 // Insert code into the entry block that creates and registers the function
5808 SetupEntryBlockForSjLj(MI, MBB, DispatchBB, FI);
5810 MachineMemOperand *FIMMOLd =
5811 MF->getMachineMemOperand(MachinePointerInfo::getFixedStack(FI),
5812 MachineMemOperand::MOLoad |
5813 MachineMemOperand::MOVolatile, 4, 4);
5815 if (AFI->isThumb1OnlyFunction())
5816 BuildMI(DispatchBB, dl, TII->get(ARM::tInt_eh_sjlj_dispatchsetup));
5817 else if (!Subtarget->hasVFP2())
5818 BuildMI(DispatchBB, dl, TII->get(ARM::Int_eh_sjlj_dispatchsetup_nofp));
5820 BuildMI(DispatchBB, dl, TII->get(ARM::Int_eh_sjlj_dispatchsetup));
5822 unsigned NumLPads = LPadList.size();
5823 if (Subtarget->isThumb2()) {
5824 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5825 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2LDRi12), NewVReg1)
5828 .addMemOperand(FIMMOLd));
5830 if (NumLPads < 256) {
5831 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPri))
5833 .addImm(LPadList.size()));
5835 unsigned VReg1 = MRI->createVirtualRegister(TRC);
5836 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2MOVi16), VReg1)
5837 .addImm(NumLPads & 0xFFFF));
5839 unsigned VReg2 = VReg1;
5840 if ((NumLPads & 0xFFFF0000) != 0) {
5841 VReg2 = MRI->createVirtualRegister(TRC);
5842 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2MOVTi16), VReg2)
5844 .addImm(NumLPads >> 16));
5847 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPrr))
5852 BuildMI(DispatchBB, dl, TII->get(ARM::t2Bcc))
5857 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
5858 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::t2LEApcrelJT),NewVReg3)
5859 .addJumpTableIndex(MJTI)
5862 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
5865 BuildMI(DispContBB, dl, TII->get(ARM::t2ADDrs), NewVReg4)
5866 .addReg(NewVReg3, RegState::Kill)
5868 .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, 2))));
5870 BuildMI(DispContBB, dl, TII->get(ARM::t2BR_JT))
5871 .addReg(NewVReg4, RegState::Kill)
5873 .addJumpTableIndex(MJTI)
5875 } else if (Subtarget->isThumb()) {
5876 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5877 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tLDRspi), NewVReg1)
5880 .addMemOperand(FIMMOLd));
5882 if (NumLPads < 256) {
5883 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tCMPi8))
5887 MachineConstantPool *ConstantPool = MF->getConstantPool();
5888 Type *Int32Ty = Type::getInt32Ty(MF->getFunction()->getContext());
5889 const Constant *C = ConstantInt::get(Int32Ty, NumLPads);
5891 // MachineConstantPool wants an explicit alignment.
5892 unsigned Align = getTargetData()->getPrefTypeAlignment(Int32Ty);
5894 Align = getTargetData()->getTypeAllocSize(C->getType());
5895 unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align);
5897 unsigned VReg1 = MRI->createVirtualRegister(TRC);
5898 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tLDRpci))
5899 .addReg(VReg1, RegState::Define)
5900 .addConstantPoolIndex(Idx));
5901 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tCMPr))
5906 BuildMI(DispatchBB, dl, TII->get(ARM::tBcc))
5911 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
5912 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLSLri), NewVReg2)
5913 .addReg(ARM::CPSR, RegState::Define)
5917 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
5918 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLEApcrelJT), NewVReg3)
5919 .addJumpTableIndex(MJTI)
5922 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
5923 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tADDrr), NewVReg4)
5924 .addReg(ARM::CPSR, RegState::Define)
5925 .addReg(NewVReg2, RegState::Kill)
5928 MachineMemOperand *JTMMOLd =
5929 MF->getMachineMemOperand(MachinePointerInfo::getJumpTable(),
5930 MachineMemOperand::MOLoad, 4, 4);
5932 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
5933 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLDRi), NewVReg5)
5934 .addReg(NewVReg4, RegState::Kill)
5936 .addMemOperand(JTMMOLd));
5938 unsigned NewVReg6 = MRI->createVirtualRegister(TRC);
5939 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tADDrr), NewVReg6)
5940 .addReg(ARM::CPSR, RegState::Define)
5941 .addReg(NewVReg5, RegState::Kill)
5944 BuildMI(DispContBB, dl, TII->get(ARM::tBR_JTr))
5945 .addReg(NewVReg6, RegState::Kill)
5946 .addJumpTableIndex(MJTI)
5949 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5950 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::LDRi12), NewVReg1)
5953 .addMemOperand(FIMMOLd));
5955 if (NumLPads < 256) {
5956 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPri))
5959 } else if (Subtarget->hasV6T2Ops() && isUInt<16>(NumLPads)) {
5960 unsigned VReg1 = MRI->createVirtualRegister(TRC);
5961 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::MOVi16), VReg1)
5962 .addImm(NumLPads & 0xFFFF));
5964 unsigned VReg2 = VReg1;
5965 if ((NumLPads & 0xFFFF0000) != 0) {
5966 VReg2 = MRI->createVirtualRegister(TRC);
5967 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::MOVTi16), VReg2)
5969 .addImm(NumLPads >> 16));
5972 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPrr))
5976 MachineConstantPool *ConstantPool = MF->getConstantPool();
5977 Type *Int32Ty = Type::getInt32Ty(MF->getFunction()->getContext());
5978 const Constant *C = ConstantInt::get(Int32Ty, NumLPads);
5980 // MachineConstantPool wants an explicit alignment.
5981 unsigned Align = getTargetData()->getPrefTypeAlignment(Int32Ty);
5983 Align = getTargetData()->getTypeAllocSize(C->getType());
5984 unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align);
5986 unsigned VReg1 = MRI->createVirtualRegister(TRC);
5987 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::LDRcp))
5988 .addReg(VReg1, RegState::Define)
5989 .addConstantPoolIndex(Idx)
5991 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPrr))
5993 .addReg(VReg1, RegState::Kill));
5996 BuildMI(DispatchBB, dl, TII->get(ARM::Bcc))
6001 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
6003 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::MOVsi), NewVReg3)
6005 .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, 2))));
6006 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
6007 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::LEApcrelJT), NewVReg4)
6008 .addJumpTableIndex(MJTI)
6011 MachineMemOperand *JTMMOLd =
6012 MF->getMachineMemOperand(MachinePointerInfo::getJumpTable(),
6013 MachineMemOperand::MOLoad, 4, 4);
6014 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
6016 BuildMI(DispContBB, dl, TII->get(ARM::LDRrs), NewVReg5)
6017 .addReg(NewVReg3, RegState::Kill)
6020 .addMemOperand(JTMMOLd));
6022 BuildMI(DispContBB, dl, TII->get(ARM::BR_JTadd))
6023 .addReg(NewVReg5, RegState::Kill)
6025 .addJumpTableIndex(MJTI)
6029 // Add the jump table entries as successors to the MBB.
6030 MachineBasicBlock *PrevMBB = 0;
6031 for (std::vector<MachineBasicBlock*>::iterator
6032 I = LPadList.begin(), E = LPadList.end(); I != E; ++I) {
6033 MachineBasicBlock *CurMBB = *I;
6034 if (PrevMBB != CurMBB)
6035 DispContBB->addSuccessor(CurMBB);
6039 // N.B. the order the invoke BBs are processed in doesn't matter here.
6040 const ARMBaseInstrInfo *AII = static_cast<const ARMBaseInstrInfo*>(TII);
6041 const ARMBaseRegisterInfo &RI = AII->getRegisterInfo();
6042 const unsigned *SavedRegs = RI.getCalleeSavedRegs(MF);
6043 SmallVector<MachineBasicBlock*, 64> MBBLPads;
6044 for (SmallPtrSet<MachineBasicBlock*, 64>::iterator
6045 I = InvokeBBs.begin(), E = InvokeBBs.end(); I != E; ++I) {
6046 MachineBasicBlock *BB = *I;
6048 // Remove the landing pad successor from the invoke block and replace it
6049 // with the new dispatch block.
6050 SmallVector<MachineBasicBlock*, 4> Successors(BB->succ_begin(),
6052 while (!Successors.empty()) {
6053 MachineBasicBlock *SMBB = Successors.pop_back_val();
6054 if (SMBB->isLandingPad()) {
6055 BB->removeSuccessor(SMBB);
6056 MBBLPads.push_back(SMBB);
6060 BB->addSuccessor(DispatchBB);
6062 // Find the invoke call and mark all of the callee-saved registers as
6063 // 'implicit defined' so that they're spilled. This prevents code from
6064 // moving instructions to before the EH block, where they will never be
6066 for (MachineBasicBlock::reverse_iterator
6067 II = BB->rbegin(), IE = BB->rend(); II != IE; ++II) {
6068 if (!II->isCall()) continue;
6070 DenseMap<unsigned, bool> DefRegs;
6071 for (MachineInstr::mop_iterator
6072 OI = II->operands_begin(), OE = II->operands_end();
6074 if (!OI->isReg()) continue;
6075 DefRegs[OI->getReg()] = true;
6078 MachineInstrBuilder MIB(&*II);
6080 for (unsigned i = 0; SavedRegs[i] != 0; ++i) {
6081 unsigned Reg = SavedRegs[i];
6082 if (Subtarget->isThumb2() &&
6083 !ARM::tGPRRegisterClass->contains(Reg) &&
6084 !ARM::hGPRRegisterClass->contains(Reg))
6086 else if (Subtarget->isThumb1Only() &&
6087 !ARM::tGPRRegisterClass->contains(Reg))
6089 else if (!Subtarget->isThumb() &&
6090 !ARM::GPRRegisterClass->contains(Reg))
6093 MIB.addReg(Reg, RegState::ImplicitDefine | RegState::Dead);
6100 // Mark all former landing pads as non-landing pads. The dispatch is the only
6102 for (SmallVectorImpl<MachineBasicBlock*>::iterator
6103 I = MBBLPads.begin(), E = MBBLPads.end(); I != E; ++I)
6104 (*I)->setIsLandingPad(false);
6106 // The instruction is gone now.
6107 MI->eraseFromParent();
6113 MachineBasicBlock *OtherSucc(MachineBasicBlock *MBB, MachineBasicBlock *Succ) {
6114 for (MachineBasicBlock::succ_iterator I = MBB->succ_begin(),
6115 E = MBB->succ_end(); I != E; ++I)
6118 llvm_unreachable("Expecting a BB with two successors!");
6122 ARMTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
6123 MachineBasicBlock *BB) const {
6124 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
6125 DebugLoc dl = MI->getDebugLoc();
6126 bool isThumb2 = Subtarget->isThumb2();
6127 switch (MI->getOpcode()) {
6130 llvm_unreachable("Unexpected instr type to insert");
6132 // The Thumb2 pre-indexed stores have the same MI operands, they just
6133 // define them differently in the .td files from the isel patterns, so
6134 // they need pseudos.
6135 case ARM::t2STR_preidx:
6136 MI->setDesc(TII->get(ARM::t2STR_PRE));
6138 case ARM::t2STRB_preidx:
6139 MI->setDesc(TII->get(ARM::t2STRB_PRE));
6141 case ARM::t2STRH_preidx:
6142 MI->setDesc(TII->get(ARM::t2STRH_PRE));
6145 case ARM::STRi_preidx:
6146 case ARM::STRBi_preidx: {
6147 unsigned NewOpc = MI->getOpcode() == ARM::STRi_preidx ?
6148 ARM::STR_PRE_IMM : ARM::STRB_PRE_IMM;
6149 // Decode the offset.
6150 unsigned Offset = MI->getOperand(4).getImm();
6151 bool isSub = ARM_AM::getAM2Op(Offset) == ARM_AM::sub;
6152 Offset = ARM_AM::getAM2Offset(Offset);
6156 MachineMemOperand *MMO = *MI->memoperands_begin();
6157 BuildMI(*BB, MI, dl, TII->get(NewOpc))
6158 .addOperand(MI->getOperand(0)) // Rn_wb
6159 .addOperand(MI->getOperand(1)) // Rt
6160 .addOperand(MI->getOperand(2)) // Rn
6161 .addImm(Offset) // offset (skip GPR==zero_reg)
6162 .addOperand(MI->getOperand(5)) // pred
6163 .addOperand(MI->getOperand(6))
6164 .addMemOperand(MMO);
6165 MI->eraseFromParent();
6168 case ARM::STRr_preidx:
6169 case ARM::STRBr_preidx:
6170 case ARM::STRH_preidx: {
6172 switch (MI->getOpcode()) {
6173 default: llvm_unreachable("unexpected opcode!");
6174 case ARM::STRr_preidx: NewOpc = ARM::STR_PRE_REG; break;
6175 case ARM::STRBr_preidx: NewOpc = ARM::STRB_PRE_REG; break;
6176 case ARM::STRH_preidx: NewOpc = ARM::STRH_PRE; break;
6178 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(NewOpc));
6179 for (unsigned i = 0; i < MI->getNumOperands(); ++i)
6180 MIB.addOperand(MI->getOperand(i));
6181 MI->eraseFromParent();
6184 case ARM::ATOMIC_LOAD_ADD_I8:
6185 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
6186 case ARM::ATOMIC_LOAD_ADD_I16:
6187 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
6188 case ARM::ATOMIC_LOAD_ADD_I32:
6189 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
6191 case ARM::ATOMIC_LOAD_AND_I8:
6192 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
6193 case ARM::ATOMIC_LOAD_AND_I16:
6194 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
6195 case ARM::ATOMIC_LOAD_AND_I32:
6196 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
6198 case ARM::ATOMIC_LOAD_OR_I8:
6199 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
6200 case ARM::ATOMIC_LOAD_OR_I16:
6201 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
6202 case ARM::ATOMIC_LOAD_OR_I32:
6203 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
6205 case ARM::ATOMIC_LOAD_XOR_I8:
6206 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
6207 case ARM::ATOMIC_LOAD_XOR_I16:
6208 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
6209 case ARM::ATOMIC_LOAD_XOR_I32:
6210 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
6212 case ARM::ATOMIC_LOAD_NAND_I8:
6213 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
6214 case ARM::ATOMIC_LOAD_NAND_I16:
6215 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
6216 case ARM::ATOMIC_LOAD_NAND_I32:
6217 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
6219 case ARM::ATOMIC_LOAD_SUB_I8:
6220 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
6221 case ARM::ATOMIC_LOAD_SUB_I16:
6222 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
6223 case ARM::ATOMIC_LOAD_SUB_I32:
6224 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
6226 case ARM::ATOMIC_LOAD_MIN_I8:
6227 return EmitAtomicBinaryMinMax(MI, BB, 1, true, ARMCC::LT);
6228 case ARM::ATOMIC_LOAD_MIN_I16:
6229 return EmitAtomicBinaryMinMax(MI, BB, 2, true, ARMCC::LT);
6230 case ARM::ATOMIC_LOAD_MIN_I32:
6231 return EmitAtomicBinaryMinMax(MI, BB, 4, true, ARMCC::LT);
6233 case ARM::ATOMIC_LOAD_MAX_I8:
6234 return EmitAtomicBinaryMinMax(MI, BB, 1, true, ARMCC::GT);
6235 case ARM::ATOMIC_LOAD_MAX_I16:
6236 return EmitAtomicBinaryMinMax(MI, BB, 2, true, ARMCC::GT);
6237 case ARM::ATOMIC_LOAD_MAX_I32:
6238 return EmitAtomicBinaryMinMax(MI, BB, 4, true, ARMCC::GT);
6240 case ARM::ATOMIC_LOAD_UMIN_I8:
6241 return EmitAtomicBinaryMinMax(MI, BB, 1, false, ARMCC::LO);
6242 case ARM::ATOMIC_LOAD_UMIN_I16:
6243 return EmitAtomicBinaryMinMax(MI, BB, 2, false, ARMCC::LO);
6244 case ARM::ATOMIC_LOAD_UMIN_I32:
6245 return EmitAtomicBinaryMinMax(MI, BB, 4, false, ARMCC::LO);
6247 case ARM::ATOMIC_LOAD_UMAX_I8:
6248 return EmitAtomicBinaryMinMax(MI, BB, 1, false, ARMCC::HI);
6249 case ARM::ATOMIC_LOAD_UMAX_I16:
6250 return EmitAtomicBinaryMinMax(MI, BB, 2, false, ARMCC::HI);
6251 case ARM::ATOMIC_LOAD_UMAX_I32:
6252 return EmitAtomicBinaryMinMax(MI, BB, 4, false, ARMCC::HI);
6254 case ARM::ATOMIC_SWAP_I8: return EmitAtomicBinary(MI, BB, 1, 0);
6255 case ARM::ATOMIC_SWAP_I16: return EmitAtomicBinary(MI, BB, 2, 0);
6256 case ARM::ATOMIC_SWAP_I32: return EmitAtomicBinary(MI, BB, 4, 0);
6258 case ARM::ATOMIC_CMP_SWAP_I8: return EmitAtomicCmpSwap(MI, BB, 1);
6259 case ARM::ATOMIC_CMP_SWAP_I16: return EmitAtomicCmpSwap(MI, BB, 2);
6260 case ARM::ATOMIC_CMP_SWAP_I32: return EmitAtomicCmpSwap(MI, BB, 4);
6263 case ARM::ATOMADD6432:
6264 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr,
6265 isThumb2 ? ARM::t2ADCrr : ARM::ADCrr,
6266 /*NeedsCarry*/ true);
6267 case ARM::ATOMSUB6432:
6268 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr,
6269 isThumb2 ? ARM::t2SBCrr : ARM::SBCrr,
6270 /*NeedsCarry*/ true);
6271 case ARM::ATOMOR6432:
6272 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr,
6273 isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
6274 case ARM::ATOMXOR6432:
6275 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2EORrr : ARM::EORrr,
6276 isThumb2 ? ARM::t2EORrr : ARM::EORrr);
6277 case ARM::ATOMAND6432:
6278 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr,
6279 isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
6280 case ARM::ATOMSWAP6432:
6281 return EmitAtomicBinary64(MI, BB, 0, 0, false);
6282 case ARM::ATOMCMPXCHG6432:
6283 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr,
6284 isThumb2 ? ARM::t2SBCrr : ARM::SBCrr,
6285 /*NeedsCarry*/ false, /*IsCmpxchg*/true);
6287 case ARM::tMOVCCr_pseudo: {
6288 // To "insert" a SELECT_CC instruction, we actually have to insert the
6289 // diamond control-flow pattern. The incoming instruction knows the
6290 // destination vreg to set, the condition code register to branch on, the
6291 // true/false values to select between, and a branch opcode to use.
6292 const BasicBlock *LLVM_BB = BB->getBasicBlock();
6293 MachineFunction::iterator It = BB;
6299 // cmpTY ccX, r1, r2
6301 // fallthrough --> copy0MBB
6302 MachineBasicBlock *thisMBB = BB;
6303 MachineFunction *F = BB->getParent();
6304 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
6305 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
6306 F->insert(It, copy0MBB);
6307 F->insert(It, sinkMBB);
6309 // Transfer the remainder of BB and its successor edges to sinkMBB.
6310 sinkMBB->splice(sinkMBB->begin(), BB,
6311 llvm::next(MachineBasicBlock::iterator(MI)),
6313 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
6315 BB->addSuccessor(copy0MBB);
6316 BB->addSuccessor(sinkMBB);
6318 BuildMI(BB, dl, TII->get(ARM::tBcc)).addMBB(sinkMBB)
6319 .addImm(MI->getOperand(3).getImm()).addReg(MI->getOperand(4).getReg());
6322 // %FalseValue = ...
6323 // # fallthrough to sinkMBB
6326 // Update machine-CFG edges
6327 BB->addSuccessor(sinkMBB);
6330 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
6333 BuildMI(*BB, BB->begin(), dl,
6334 TII->get(ARM::PHI), MI->getOperand(0).getReg())
6335 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
6336 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
6338 MI->eraseFromParent(); // The pseudo instruction is gone now.
6343 case ARM::BCCZi64: {
6344 // If there is an unconditional branch to the other successor, remove it.
6345 BB->erase(llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
6347 // Compare both parts that make up the double comparison separately for
6349 bool RHSisZero = MI->getOpcode() == ARM::BCCZi64;
6351 unsigned LHS1 = MI->getOperand(1).getReg();
6352 unsigned LHS2 = MI->getOperand(2).getReg();
6354 AddDefaultPred(BuildMI(BB, dl,
6355 TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
6356 .addReg(LHS1).addImm(0));
6357 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
6358 .addReg(LHS2).addImm(0)
6359 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
6361 unsigned RHS1 = MI->getOperand(3).getReg();
6362 unsigned RHS2 = MI->getOperand(4).getReg();
6363 AddDefaultPred(BuildMI(BB, dl,
6364 TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
6365 .addReg(LHS1).addReg(RHS1));
6366 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
6367 .addReg(LHS2).addReg(RHS2)
6368 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
6371 MachineBasicBlock *destMBB = MI->getOperand(RHSisZero ? 3 : 5).getMBB();
6372 MachineBasicBlock *exitMBB = OtherSucc(BB, destMBB);
6373 if (MI->getOperand(0).getImm() == ARMCC::NE)
6374 std::swap(destMBB, exitMBB);
6376 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
6377 .addMBB(destMBB).addImm(ARMCC::EQ).addReg(ARM::CPSR);
6379 AddDefaultPred(BuildMI(BB, dl, TII->get(ARM::t2B)).addMBB(exitMBB));
6381 BuildMI(BB, dl, TII->get(ARM::B)) .addMBB(exitMBB);
6383 MI->eraseFromParent(); // The pseudo instruction is gone now.
6387 case ARM::Int_eh_sjlj_setjmp:
6388 case ARM::Int_eh_sjlj_setjmp_nofp:
6389 case ARM::tInt_eh_sjlj_setjmp:
6390 case ARM::t2Int_eh_sjlj_setjmp:
6391 case ARM::t2Int_eh_sjlj_setjmp_nofp:
6392 EmitSjLjDispatchBlock(MI, BB);
6397 // To insert an ABS instruction, we have to insert the
6398 // diamond control-flow pattern. The incoming instruction knows the
6399 // source vreg to test against 0, the destination vreg to set,
6400 // the condition code register to branch on, the
6401 // true/false values to select between, and a branch opcode to use.
6406 // BCC (branch to SinkBB if V0 >= 0)
6407 // RSBBB: V3 = RSBri V2, 0 (compute ABS if V2 < 0)
6408 // SinkBB: V1 = PHI(V2, V3)
6409 const BasicBlock *LLVM_BB = BB->getBasicBlock();
6410 MachineFunction::iterator BBI = BB;
6412 MachineFunction *Fn = BB->getParent();
6413 MachineBasicBlock *RSBBB = Fn->CreateMachineBasicBlock(LLVM_BB);
6414 MachineBasicBlock *SinkBB = Fn->CreateMachineBasicBlock(LLVM_BB);
6415 Fn->insert(BBI, RSBBB);
6416 Fn->insert(BBI, SinkBB);
6418 unsigned int ABSSrcReg = MI->getOperand(1).getReg();
6419 unsigned int ABSDstReg = MI->getOperand(0).getReg();
6420 bool isThumb2 = Subtarget->isThumb2();
6421 MachineRegisterInfo &MRI = Fn->getRegInfo();
6422 // In Thumb mode S must not be specified if source register is the SP or
6423 // PC and if destination register is the SP, so restrict register class
6424 unsigned NewMovDstReg = MRI.createVirtualRegister(
6425 isThumb2 ? ARM::rGPRRegisterClass : ARM::GPRRegisterClass);
6426 unsigned NewRsbDstReg = MRI.createVirtualRegister(
6427 isThumb2 ? ARM::rGPRRegisterClass : ARM::GPRRegisterClass);
6429 // Transfer the remainder of BB and its successor edges to sinkMBB.
6430 SinkBB->splice(SinkBB->begin(), BB,
6431 llvm::next(MachineBasicBlock::iterator(MI)),
6433 SinkBB->transferSuccessorsAndUpdatePHIs(BB);
6435 BB->addSuccessor(RSBBB);
6436 BB->addSuccessor(SinkBB);
6438 // fall through to SinkMBB
6439 RSBBB->addSuccessor(SinkBB);
6441 // insert a movs at the end of BB
6442 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2MOVr : ARM::MOVr),
6444 .addReg(ABSSrcReg, RegState::Kill)
6445 .addImm((unsigned)ARMCC::AL).addReg(0)
6446 .addReg(ARM::CPSR, RegState::Define);
6448 // insert a bcc with opposite CC to ARMCC::MI at the end of BB
6450 TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc)).addMBB(SinkBB)
6451 .addImm(ARMCC::getOppositeCondition(ARMCC::MI)).addReg(ARM::CPSR);
6453 // insert rsbri in RSBBB
6454 // Note: BCC and rsbri will be converted into predicated rsbmi
6455 // by if-conversion pass
6456 BuildMI(*RSBBB, RSBBB->begin(), dl,
6457 TII->get(isThumb2 ? ARM::t2RSBri : ARM::RSBri), NewRsbDstReg)
6458 .addReg(NewMovDstReg, RegState::Kill)
6459 .addImm(0).addImm((unsigned)ARMCC::AL).addReg(0).addReg(0);
6461 // insert PHI in SinkBB,
6462 // reuse ABSDstReg to not change uses of ABS instruction
6463 BuildMI(*SinkBB, SinkBB->begin(), dl,
6464 TII->get(ARM::PHI), ABSDstReg)
6465 .addReg(NewRsbDstReg).addMBB(RSBBB)
6466 .addReg(NewMovDstReg).addMBB(BB);
6468 // remove ABS instruction
6469 MI->eraseFromParent();
6471 // return last added BB
6477 void ARMTargetLowering::AdjustInstrPostInstrSelection(MachineInstr *MI,
6478 SDNode *Node) const {
6479 if (!MI->hasPostISelHook()) {
6480 assert(!convertAddSubFlagsOpcode(MI->getOpcode()) &&
6481 "Pseudo flag-setting opcodes must be marked with 'hasPostISelHook'");
6485 const MCInstrDesc *MCID = &MI->getDesc();
6486 // Adjust potentially 's' setting instructions after isel, i.e. ADC, SBC, RSB,
6487 // RSC. Coming out of isel, they have an implicit CPSR def, but the optional
6488 // operand is still set to noreg. If needed, set the optional operand's
6489 // register to CPSR, and remove the redundant implicit def.
6491 // e.g. ADCS (..., CPSR<imp-def>) -> ADC (... opt:CPSR<def>).
6493 // Rename pseudo opcodes.
6494 unsigned NewOpc = convertAddSubFlagsOpcode(MI->getOpcode());
6496 const ARMBaseInstrInfo *TII =
6497 static_cast<const ARMBaseInstrInfo*>(getTargetMachine().getInstrInfo());
6498 MCID = &TII->get(NewOpc);
6500 assert(MCID->getNumOperands() == MI->getDesc().getNumOperands() + 1 &&
6501 "converted opcode should be the same except for cc_out");
6505 // Add the optional cc_out operand
6506 MI->addOperand(MachineOperand::CreateReg(0, /*isDef=*/true));
6508 unsigned ccOutIdx = MCID->getNumOperands() - 1;
6510 // Any ARM instruction that sets the 's' bit should specify an optional
6511 // "cc_out" operand in the last operand position.
6512 if (!MI->hasOptionalDef() || !MCID->OpInfo[ccOutIdx].isOptionalDef()) {
6513 assert(!NewOpc && "Optional cc_out operand required");
6516 // Look for an implicit def of CPSR added by MachineInstr ctor. Remove it
6517 // since we already have an optional CPSR def.
6518 bool definesCPSR = false;
6519 bool deadCPSR = false;
6520 for (unsigned i = MCID->getNumOperands(), e = MI->getNumOperands();
6522 const MachineOperand &MO = MI->getOperand(i);
6523 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR) {
6527 MI->RemoveOperand(i);
6532 assert(!NewOpc && "Optional cc_out operand required");
6535 assert(deadCPSR == !Node->hasAnyUseOfValue(1) && "inconsistent dead flag");
6537 assert(!MI->getOperand(ccOutIdx).getReg() &&
6538 "expect uninitialized optional cc_out operand");
6542 // If this instruction was defined with an optional CPSR def and its dag node
6543 // had a live implicit CPSR def, then activate the optional CPSR def.
6544 MachineOperand &MO = MI->getOperand(ccOutIdx);
6545 MO.setReg(ARM::CPSR);
6549 //===----------------------------------------------------------------------===//
6550 // ARM Optimization Hooks
6551 //===----------------------------------------------------------------------===//
6554 SDValue combineSelectAndUse(SDNode *N, SDValue Slct, SDValue OtherOp,
6555 TargetLowering::DAGCombinerInfo &DCI) {
6556 SelectionDAG &DAG = DCI.DAG;
6557 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
6558 EVT VT = N->getValueType(0);
6559 unsigned Opc = N->getOpcode();
6560 bool isSlctCC = Slct.getOpcode() == ISD::SELECT_CC;
6561 SDValue LHS = isSlctCC ? Slct.getOperand(2) : Slct.getOperand(1);
6562 SDValue RHS = isSlctCC ? Slct.getOperand(3) : Slct.getOperand(2);
6563 ISD::CondCode CC = ISD::SETCC_INVALID;
6566 CC = cast<CondCodeSDNode>(Slct.getOperand(4))->get();
6568 SDValue CCOp = Slct.getOperand(0);
6569 if (CCOp.getOpcode() == ISD::SETCC)
6570 CC = cast<CondCodeSDNode>(CCOp.getOperand(2))->get();
6573 bool DoXform = false;
6575 assert ((Opc == ISD::ADD || (Opc == ISD::SUB && Slct == N->getOperand(1))) &&
6578 if (LHS.getOpcode() == ISD::Constant &&
6579 cast<ConstantSDNode>(LHS)->isNullValue()) {
6581 } else if (CC != ISD::SETCC_INVALID &&
6582 RHS.getOpcode() == ISD::Constant &&
6583 cast<ConstantSDNode>(RHS)->isNullValue()) {
6584 std::swap(LHS, RHS);
6585 SDValue Op0 = Slct.getOperand(0);
6586 EVT OpVT = isSlctCC ? Op0.getValueType() :
6587 Op0.getOperand(0).getValueType();
6588 bool isInt = OpVT.isInteger();
6589 CC = ISD::getSetCCInverse(CC, isInt);
6591 if (!TLI.isCondCodeLegal(CC, OpVT))
6592 return SDValue(); // Inverse operator isn't legal.
6599 SDValue Result = DAG.getNode(Opc, RHS.getDebugLoc(), VT, OtherOp, RHS);
6601 return DAG.getSelectCC(N->getDebugLoc(), OtherOp, Result,
6602 Slct.getOperand(0), Slct.getOperand(1), CC);
6603 SDValue CCOp = Slct.getOperand(0);
6605 CCOp = DAG.getSetCC(Slct.getDebugLoc(), CCOp.getValueType(),
6606 CCOp.getOperand(0), CCOp.getOperand(1), CC);
6607 return DAG.getNode(ISD::SELECT, N->getDebugLoc(), VT,
6608 CCOp, OtherOp, Result);
6613 // AddCombineToVPADDL- For pair-wise add on neon, use the vpaddl instruction
6614 // (only after legalization).
6615 static SDValue AddCombineToVPADDL(SDNode *N, SDValue N0, SDValue N1,
6616 TargetLowering::DAGCombinerInfo &DCI,
6617 const ARMSubtarget *Subtarget) {
6619 // Only perform optimization if after legalize, and if NEON is available. We
6620 // also expected both operands to be BUILD_VECTORs.
6621 if (DCI.isBeforeLegalize() || !Subtarget->hasNEON()
6622 || N0.getOpcode() != ISD::BUILD_VECTOR
6623 || N1.getOpcode() != ISD::BUILD_VECTOR)
6626 // Check output type since VPADDL operand elements can only be 8, 16, or 32.
6627 EVT VT = N->getValueType(0);
6628 if (!VT.isInteger() || VT.getVectorElementType() == MVT::i64)
6631 // Check that the vector operands are of the right form.
6632 // N0 and N1 are BUILD_VECTOR nodes with N number of EXTRACT_VECTOR
6633 // operands, where N is the size of the formed vector.
6634 // Each EXTRACT_VECTOR should have the same input vector and odd or even
6635 // index such that we have a pair wise add pattern.
6637 // Grab the vector that all EXTRACT_VECTOR nodes should be referencing.
6638 if (N0->getOperand(0)->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
6640 SDValue Vec = N0->getOperand(0)->getOperand(0);
6641 SDNode *V = Vec.getNode();
6642 unsigned nextIndex = 0;
6644 // For each operands to the ADD which are BUILD_VECTORs,
6645 // check to see if each of their operands are an EXTRACT_VECTOR with
6646 // the same vector and appropriate index.
6647 for (unsigned i = 0, e = N0->getNumOperands(); i != e; ++i) {
6648 if (N0->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT
6649 && N1->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
6651 SDValue ExtVec0 = N0->getOperand(i);
6652 SDValue ExtVec1 = N1->getOperand(i);
6654 // First operand is the vector, verify its the same.
6655 if (V != ExtVec0->getOperand(0).getNode() ||
6656 V != ExtVec1->getOperand(0).getNode())
6659 // Second is the constant, verify its correct.
6660 ConstantSDNode *C0 = dyn_cast<ConstantSDNode>(ExtVec0->getOperand(1));
6661 ConstantSDNode *C1 = dyn_cast<ConstantSDNode>(ExtVec1->getOperand(1));
6663 // For the constant, we want to see all the even or all the odd.
6664 if (!C0 || !C1 || C0->getZExtValue() != nextIndex
6665 || C1->getZExtValue() != nextIndex+1)
6674 // Create VPADDL node.
6675 SelectionDAG &DAG = DCI.DAG;
6676 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
6678 // Build operand list.
6679 SmallVector<SDValue, 8> Ops;
6680 Ops.push_back(DAG.getConstant(Intrinsic::arm_neon_vpaddls,
6681 TLI.getPointerTy()));
6683 // Input is the vector.
6686 // Get widened type and narrowed type.
6688 unsigned numElem = VT.getVectorNumElements();
6689 switch (VT.getVectorElementType().getSimpleVT().SimpleTy) {
6690 case MVT::i8: widenType = MVT::getVectorVT(MVT::i16, numElem); break;
6691 case MVT::i16: widenType = MVT::getVectorVT(MVT::i32, numElem); break;
6692 case MVT::i32: widenType = MVT::getVectorVT(MVT::i64, numElem); break;
6694 llvm_unreachable("Invalid vector element type for padd optimization.");
6697 SDValue tmp = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, N->getDebugLoc(),
6698 widenType, &Ops[0], Ops.size());
6699 return DAG.getNode(ISD::TRUNCATE, N->getDebugLoc(), VT, tmp);
6702 /// PerformADDCombineWithOperands - Try DAG combinations for an ADD with
6703 /// operands N0 and N1. This is a helper for PerformADDCombine that is
6704 /// called with the default operands, and if that fails, with commuted
6706 static SDValue PerformADDCombineWithOperands(SDNode *N, SDValue N0, SDValue N1,
6707 TargetLowering::DAGCombinerInfo &DCI,
6708 const ARMSubtarget *Subtarget){
6710 // Attempt to create vpaddl for this add.
6711 SDValue Result = AddCombineToVPADDL(N, N0, N1, DCI, Subtarget);
6712 if (Result.getNode())
6715 // fold (add (select cc, 0, c), x) -> (select cc, x, (add, x, c))
6716 if (N0.getOpcode() == ISD::SELECT && N0.getNode()->hasOneUse()) {
6717 SDValue Result = combineSelectAndUse(N, N0, N1, DCI);
6718 if (Result.getNode()) return Result;
6723 /// PerformADDCombine - Target-specific dag combine xforms for ISD::ADD.
6725 static SDValue PerformADDCombine(SDNode *N,
6726 TargetLowering::DAGCombinerInfo &DCI,
6727 const ARMSubtarget *Subtarget) {
6728 SDValue N0 = N->getOperand(0);
6729 SDValue N1 = N->getOperand(1);
6731 // First try with the default operand order.
6732 SDValue Result = PerformADDCombineWithOperands(N, N0, N1, DCI, Subtarget);
6733 if (Result.getNode())
6736 // If that didn't work, try again with the operands commuted.
6737 return PerformADDCombineWithOperands(N, N1, N0, DCI, Subtarget);
6740 /// PerformSUBCombine - Target-specific dag combine xforms for ISD::SUB.
6742 static SDValue PerformSUBCombine(SDNode *N,
6743 TargetLowering::DAGCombinerInfo &DCI) {
6744 SDValue N0 = N->getOperand(0);
6745 SDValue N1 = N->getOperand(1);
6747 // fold (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c))
6748 if (N1.getOpcode() == ISD::SELECT && N1.getNode()->hasOneUse()) {
6749 SDValue Result = combineSelectAndUse(N, N1, N0, DCI);
6750 if (Result.getNode()) return Result;
6756 /// PerformVMULCombine
6757 /// Distribute (A + B) * C to (A * C) + (B * C) to take advantage of the
6758 /// special multiplier accumulator forwarding.
6764 static SDValue PerformVMULCombine(SDNode *N,
6765 TargetLowering::DAGCombinerInfo &DCI,
6766 const ARMSubtarget *Subtarget) {
6767 if (!Subtarget->hasVMLxForwarding())
6770 SelectionDAG &DAG = DCI.DAG;
6771 SDValue N0 = N->getOperand(0);
6772 SDValue N1 = N->getOperand(1);
6773 unsigned Opcode = N0.getOpcode();
6774 if (Opcode != ISD::ADD && Opcode != ISD::SUB &&
6775 Opcode != ISD::FADD && Opcode != ISD::FSUB) {
6776 Opcode = N1.getOpcode();
6777 if (Opcode != ISD::ADD && Opcode != ISD::SUB &&
6778 Opcode != ISD::FADD && Opcode != ISD::FSUB)
6783 EVT VT = N->getValueType(0);
6784 DebugLoc DL = N->getDebugLoc();
6785 SDValue N00 = N0->getOperand(0);
6786 SDValue N01 = N0->getOperand(1);
6787 return DAG.getNode(Opcode, DL, VT,
6788 DAG.getNode(ISD::MUL, DL, VT, N00, N1),
6789 DAG.getNode(ISD::MUL, DL, VT, N01, N1));
6792 static SDValue PerformMULCombine(SDNode *N,
6793 TargetLowering::DAGCombinerInfo &DCI,
6794 const ARMSubtarget *Subtarget) {
6795 SelectionDAG &DAG = DCI.DAG;
6797 if (Subtarget->isThumb1Only())
6800 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
6803 EVT VT = N->getValueType(0);
6804 if (VT.is64BitVector() || VT.is128BitVector())
6805 return PerformVMULCombine(N, DCI, Subtarget);
6809 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
6813 uint64_t MulAmt = C->getZExtValue();
6814 unsigned ShiftAmt = CountTrailingZeros_64(MulAmt);
6815 ShiftAmt = ShiftAmt & (32 - 1);
6816 SDValue V = N->getOperand(0);
6817 DebugLoc DL = N->getDebugLoc();
6820 MulAmt >>= ShiftAmt;
6821 if (isPowerOf2_32(MulAmt - 1)) {
6822 // (mul x, 2^N + 1) => (add (shl x, N), x)
6823 Res = DAG.getNode(ISD::ADD, DL, VT,
6824 V, DAG.getNode(ISD::SHL, DL, VT,
6825 V, DAG.getConstant(Log2_32(MulAmt-1),
6827 } else if (isPowerOf2_32(MulAmt + 1)) {
6828 // (mul x, 2^N - 1) => (sub (shl x, N), x)
6829 Res = DAG.getNode(ISD::SUB, DL, VT,
6830 DAG.getNode(ISD::SHL, DL, VT,
6831 V, DAG.getConstant(Log2_32(MulAmt+1),
6838 Res = DAG.getNode(ISD::SHL, DL, VT, Res,
6839 DAG.getConstant(ShiftAmt, MVT::i32));
6841 // Do not add new nodes to DAG combiner worklist.
6842 DCI.CombineTo(N, Res, false);
6846 static SDValue PerformANDCombine(SDNode *N,
6847 TargetLowering::DAGCombinerInfo &DCI) {
6849 // Attempt to use immediate-form VBIC
6850 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1));
6851 DebugLoc dl = N->getDebugLoc();
6852 EVT VT = N->getValueType(0);
6853 SelectionDAG &DAG = DCI.DAG;
6855 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
6858 APInt SplatBits, SplatUndef;
6859 unsigned SplatBitSize;
6862 BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
6863 if (SplatBitSize <= 64) {
6865 SDValue Val = isNEONModifiedImm((~SplatBits).getZExtValue(),
6866 SplatUndef.getZExtValue(), SplatBitSize,
6867 DAG, VbicVT, VT.is128BitVector(),
6869 if (Val.getNode()) {
6871 DAG.getNode(ISD::BITCAST, dl, VbicVT, N->getOperand(0));
6872 SDValue Vbic = DAG.getNode(ARMISD::VBICIMM, dl, VbicVT, Input, Val);
6873 return DAG.getNode(ISD::BITCAST, dl, VT, Vbic);
6881 /// PerformORCombine - Target-specific dag combine xforms for ISD::OR
6882 static SDValue PerformORCombine(SDNode *N,
6883 TargetLowering::DAGCombinerInfo &DCI,
6884 const ARMSubtarget *Subtarget) {
6885 // Attempt to use immediate-form VORR
6886 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1));
6887 DebugLoc dl = N->getDebugLoc();
6888 EVT VT = N->getValueType(0);
6889 SelectionDAG &DAG = DCI.DAG;
6891 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
6894 APInt SplatBits, SplatUndef;
6895 unsigned SplatBitSize;
6897 if (BVN && Subtarget->hasNEON() &&
6898 BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
6899 if (SplatBitSize <= 64) {
6901 SDValue Val = isNEONModifiedImm(SplatBits.getZExtValue(),
6902 SplatUndef.getZExtValue(), SplatBitSize,
6903 DAG, VorrVT, VT.is128BitVector(),
6905 if (Val.getNode()) {
6907 DAG.getNode(ISD::BITCAST, dl, VorrVT, N->getOperand(0));
6908 SDValue Vorr = DAG.getNode(ARMISD::VORRIMM, dl, VorrVT, Input, Val);
6909 return DAG.getNode(ISD::BITCAST, dl, VT, Vorr);
6914 SDValue N0 = N->getOperand(0);
6915 if (N0.getOpcode() != ISD::AND)
6917 SDValue N1 = N->getOperand(1);
6919 // (or (and B, A), (and C, ~A)) => (VBSL A, B, C) when A is a constant.
6920 if (Subtarget->hasNEON() && N1.getOpcode() == ISD::AND && VT.isVector() &&
6921 DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
6923 unsigned SplatBitSize;
6926 BuildVectorSDNode *BVN0 = dyn_cast<BuildVectorSDNode>(N0->getOperand(1));
6928 if (BVN0 && BVN0->isConstantSplat(SplatBits0, SplatUndef, SplatBitSize,
6929 HasAnyUndefs) && !HasAnyUndefs) {
6930 BuildVectorSDNode *BVN1 = dyn_cast<BuildVectorSDNode>(N1->getOperand(1));
6932 if (BVN1 && BVN1->isConstantSplat(SplatBits1, SplatUndef, SplatBitSize,
6933 HasAnyUndefs) && !HasAnyUndefs &&
6934 SplatBits0 == ~SplatBits1) {
6935 // Canonicalize the vector type to make instruction selection simpler.
6936 EVT CanonicalVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32;
6937 SDValue Result = DAG.getNode(ARMISD::VBSL, dl, CanonicalVT,
6938 N0->getOperand(1), N0->getOperand(0),
6940 return DAG.getNode(ISD::BITCAST, dl, VT, Result);
6945 // Try to use the ARM/Thumb2 BFI (bitfield insert) instruction when
6948 // BFI is only available on V6T2+
6949 if (Subtarget->isThumb1Only() || !Subtarget->hasV6T2Ops())
6952 DebugLoc DL = N->getDebugLoc();
6953 // 1) or (and A, mask), val => ARMbfi A, val, mask
6954 // iff (val & mask) == val
6956 // 2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
6957 // 2a) iff isBitFieldInvertedMask(mask) && isBitFieldInvertedMask(~mask2)
6958 // && mask == ~mask2
6959 // 2b) iff isBitFieldInvertedMask(~mask) && isBitFieldInvertedMask(mask2)
6960 // && ~mask == mask2
6961 // (i.e., copy a bitfield value into another bitfield of the same width)
6966 SDValue N00 = N0.getOperand(0);
6968 // The value and the mask need to be constants so we can verify this is
6969 // actually a bitfield set. If the mask is 0xffff, we can do better
6970 // via a movt instruction, so don't use BFI in that case.
6971 SDValue MaskOp = N0.getOperand(1);
6972 ConstantSDNode *MaskC = dyn_cast<ConstantSDNode>(MaskOp);
6975 unsigned Mask = MaskC->getZExtValue();
6979 // Case (1): or (and A, mask), val => ARMbfi A, val, mask
6980 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
6982 unsigned Val = N1C->getZExtValue();
6983 if ((Val & ~Mask) != Val)
6986 if (ARM::isBitFieldInvertedMask(Mask)) {
6987 Val >>= CountTrailingZeros_32(~Mask);
6989 Res = DAG.getNode(ARMISD::BFI, DL, VT, N00,
6990 DAG.getConstant(Val, MVT::i32),
6991 DAG.getConstant(Mask, MVT::i32));
6993 // Do not add new nodes to DAG combiner worklist.
6994 DCI.CombineTo(N, Res, false);
6997 } else if (N1.getOpcode() == ISD::AND) {
6998 // case (2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
6999 ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1));
7002 unsigned Mask2 = N11C->getZExtValue();
7004 // Mask and ~Mask2 (or reverse) must be equivalent for the BFI pattern
7006 if (ARM::isBitFieldInvertedMask(Mask) &&
7008 // The pack halfword instruction works better for masks that fit it,
7009 // so use that when it's available.
7010 if (Subtarget->hasT2ExtractPack() &&
7011 (Mask == 0xffff || Mask == 0xffff0000))
7014 unsigned amt = CountTrailingZeros_32(Mask2);
7015 Res = DAG.getNode(ISD::SRL, DL, VT, N1.getOperand(0),
7016 DAG.getConstant(amt, MVT::i32));
7017 Res = DAG.getNode(ARMISD::BFI, DL, VT, N00, Res,
7018 DAG.getConstant(Mask, MVT::i32));
7019 // Do not add new nodes to DAG combiner worklist.
7020 DCI.CombineTo(N, Res, false);
7022 } else if (ARM::isBitFieldInvertedMask(~Mask) &&
7024 // The pack halfword instruction works better for masks that fit it,
7025 // so use that when it's available.
7026 if (Subtarget->hasT2ExtractPack() &&
7027 (Mask2 == 0xffff || Mask2 == 0xffff0000))
7030 unsigned lsb = CountTrailingZeros_32(Mask);
7031 Res = DAG.getNode(ISD::SRL, DL, VT, N00,
7032 DAG.getConstant(lsb, MVT::i32));
7033 Res = DAG.getNode(ARMISD::BFI, DL, VT, N1.getOperand(0), Res,
7034 DAG.getConstant(Mask2, MVT::i32));
7035 // Do not add new nodes to DAG combiner worklist.
7036 DCI.CombineTo(N, Res, false);
7041 if (DAG.MaskedValueIsZero(N1, MaskC->getAPIntValue()) &&
7042 N00.getOpcode() == ISD::SHL && isa<ConstantSDNode>(N00.getOperand(1)) &&
7043 ARM::isBitFieldInvertedMask(~Mask)) {
7044 // Case (3): or (and (shl A, #shamt), mask), B => ARMbfi B, A, ~mask
7045 // where lsb(mask) == #shamt and masked bits of B are known zero.
7046 SDValue ShAmt = N00.getOperand(1);
7047 unsigned ShAmtC = cast<ConstantSDNode>(ShAmt)->getZExtValue();
7048 unsigned LSB = CountTrailingZeros_32(Mask);
7052 Res = DAG.getNode(ARMISD::BFI, DL, VT, N1, N00.getOperand(0),
7053 DAG.getConstant(~Mask, MVT::i32));
7055 // Do not add new nodes to DAG combiner worklist.
7056 DCI.CombineTo(N, Res, false);
7062 /// PerformBFICombine - (bfi A, (and B, Mask1), Mask2) -> (bfi A, B, Mask2) iff
7063 /// the bits being cleared by the AND are not demanded by the BFI.
7064 static SDValue PerformBFICombine(SDNode *N,
7065 TargetLowering::DAGCombinerInfo &DCI) {
7066 SDValue N1 = N->getOperand(1);
7067 if (N1.getOpcode() == ISD::AND) {
7068 ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1));
7071 unsigned InvMask = cast<ConstantSDNode>(N->getOperand(2))->getZExtValue();
7072 unsigned LSB = CountTrailingZeros_32(~InvMask);
7073 unsigned Width = (32 - CountLeadingZeros_32(~InvMask)) - LSB;
7074 unsigned Mask = (1 << Width)-1;
7075 unsigned Mask2 = N11C->getZExtValue();
7076 if ((Mask & (~Mask2)) == 0)
7077 return DCI.DAG.getNode(ARMISD::BFI, N->getDebugLoc(), N->getValueType(0),
7078 N->getOperand(0), N1.getOperand(0),
7084 /// PerformVMOVRRDCombine - Target-specific dag combine xforms for
7085 /// ARMISD::VMOVRRD.
7086 static SDValue PerformVMOVRRDCombine(SDNode *N,
7087 TargetLowering::DAGCombinerInfo &DCI) {
7088 // vmovrrd(vmovdrr x, y) -> x,y
7089 SDValue InDouble = N->getOperand(0);
7090 if (InDouble.getOpcode() == ARMISD::VMOVDRR)
7091 return DCI.CombineTo(N, InDouble.getOperand(0), InDouble.getOperand(1));
7093 // vmovrrd(load f64) -> (load i32), (load i32)
7094 SDNode *InNode = InDouble.getNode();
7095 if (ISD::isNormalLoad(InNode) && InNode->hasOneUse() &&
7096 InNode->getValueType(0) == MVT::f64 &&
7097 InNode->getOperand(1).getOpcode() == ISD::FrameIndex &&
7098 !cast<LoadSDNode>(InNode)->isVolatile()) {
7099 // TODO: Should this be done for non-FrameIndex operands?
7100 LoadSDNode *LD = cast<LoadSDNode>(InNode);
7102 SelectionDAG &DAG = DCI.DAG;
7103 DebugLoc DL = LD->getDebugLoc();
7104 SDValue BasePtr = LD->getBasePtr();
7105 SDValue NewLD1 = DAG.getLoad(MVT::i32, DL, LD->getChain(), BasePtr,
7106 LD->getPointerInfo(), LD->isVolatile(),
7107 LD->isNonTemporal(), LD->isInvariant(),
7108 LD->getAlignment());
7110 SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr,
7111 DAG.getConstant(4, MVT::i32));
7112 SDValue NewLD2 = DAG.getLoad(MVT::i32, DL, NewLD1.getValue(1), OffsetPtr,
7113 LD->getPointerInfo(), LD->isVolatile(),
7114 LD->isNonTemporal(), LD->isInvariant(),
7115 std::min(4U, LD->getAlignment() / 2));
7117 DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 1), NewLD2.getValue(1));
7118 SDValue Result = DCI.CombineTo(N, NewLD1, NewLD2);
7119 DCI.RemoveFromWorklist(LD);
7127 /// PerformVMOVDRRCombine - Target-specific dag combine xforms for
7128 /// ARMISD::VMOVDRR. This is also used for BUILD_VECTORs with 2 operands.
7129 static SDValue PerformVMOVDRRCombine(SDNode *N, SelectionDAG &DAG) {
7130 // N=vmovrrd(X); vmovdrr(N:0, N:1) -> bit_convert(X)
7131 SDValue Op0 = N->getOperand(0);
7132 SDValue Op1 = N->getOperand(1);
7133 if (Op0.getOpcode() == ISD::BITCAST)
7134 Op0 = Op0.getOperand(0);
7135 if (Op1.getOpcode() == ISD::BITCAST)
7136 Op1 = Op1.getOperand(0);
7137 if (Op0.getOpcode() == ARMISD::VMOVRRD &&
7138 Op0.getNode() == Op1.getNode() &&
7139 Op0.getResNo() == 0 && Op1.getResNo() == 1)
7140 return DAG.getNode(ISD::BITCAST, N->getDebugLoc(),
7141 N->getValueType(0), Op0.getOperand(0));
7145 /// PerformSTORECombine - Target-specific dag combine xforms for
7147 static SDValue PerformSTORECombine(SDNode *N,
7148 TargetLowering::DAGCombinerInfo &DCI) {
7149 // Bitcast an i64 store extracted from a vector to f64.
7150 // Otherwise, the i64 value will be legalized to a pair of i32 values.
7151 StoreSDNode *St = cast<StoreSDNode>(N);
7152 SDValue StVal = St->getValue();
7153 if (!ISD::isNormalStore(St) || St->isVolatile())
7156 if (StVal.getNode()->getOpcode() == ARMISD::VMOVDRR &&
7157 StVal.getNode()->hasOneUse() && !St->isVolatile()) {
7158 SelectionDAG &DAG = DCI.DAG;
7159 DebugLoc DL = St->getDebugLoc();
7160 SDValue BasePtr = St->getBasePtr();
7161 SDValue NewST1 = DAG.getStore(St->getChain(), DL,
7162 StVal.getNode()->getOperand(0), BasePtr,
7163 St->getPointerInfo(), St->isVolatile(),
7164 St->isNonTemporal(), St->getAlignment());
7166 SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr,
7167 DAG.getConstant(4, MVT::i32));
7168 return DAG.getStore(NewST1.getValue(0), DL, StVal.getNode()->getOperand(1),
7169 OffsetPtr, St->getPointerInfo(), St->isVolatile(),
7170 St->isNonTemporal(),
7171 std::min(4U, St->getAlignment() / 2));
7174 if (StVal.getValueType() != MVT::i64 ||
7175 StVal.getNode()->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
7178 SelectionDAG &DAG = DCI.DAG;
7179 DebugLoc dl = StVal.getDebugLoc();
7180 SDValue IntVec = StVal.getOperand(0);
7181 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64,
7182 IntVec.getValueType().getVectorNumElements());
7183 SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, IntVec);
7184 SDValue ExtElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
7185 Vec, StVal.getOperand(1));
7186 dl = N->getDebugLoc();
7187 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ExtElt);
7188 // Make the DAGCombiner fold the bitcasts.
7189 DCI.AddToWorklist(Vec.getNode());
7190 DCI.AddToWorklist(ExtElt.getNode());
7191 DCI.AddToWorklist(V.getNode());
7192 return DAG.getStore(St->getChain(), dl, V, St->getBasePtr(),
7193 St->getPointerInfo(), St->isVolatile(),
7194 St->isNonTemporal(), St->getAlignment(),
7198 /// hasNormalLoadOperand - Check if any of the operands of a BUILD_VECTOR node
7199 /// are normal, non-volatile loads. If so, it is profitable to bitcast an
7200 /// i64 vector to have f64 elements, since the value can then be loaded
7201 /// directly into a VFP register.
7202 static bool hasNormalLoadOperand(SDNode *N) {
7203 unsigned NumElts = N->getValueType(0).getVectorNumElements();
7204 for (unsigned i = 0; i < NumElts; ++i) {
7205 SDNode *Elt = N->getOperand(i).getNode();
7206 if (ISD::isNormalLoad(Elt) && !cast<LoadSDNode>(Elt)->isVolatile())
7212 /// PerformBUILD_VECTORCombine - Target-specific dag combine xforms for
7213 /// ISD::BUILD_VECTOR.
7214 static SDValue PerformBUILD_VECTORCombine(SDNode *N,
7215 TargetLowering::DAGCombinerInfo &DCI){
7216 // build_vector(N=ARMISD::VMOVRRD(X), N:1) -> bit_convert(X):
7217 // VMOVRRD is introduced when legalizing i64 types. It forces the i64 value
7218 // into a pair of GPRs, which is fine when the value is used as a scalar,
7219 // but if the i64 value is converted to a vector, we need to undo the VMOVRRD.
7220 SelectionDAG &DAG = DCI.DAG;
7221 if (N->getNumOperands() == 2) {
7222 SDValue RV = PerformVMOVDRRCombine(N, DAG);
7227 // Load i64 elements as f64 values so that type legalization does not split
7228 // them up into i32 values.
7229 EVT VT = N->getValueType(0);
7230 if (VT.getVectorElementType() != MVT::i64 || !hasNormalLoadOperand(N))
7232 DebugLoc dl = N->getDebugLoc();
7233 SmallVector<SDValue, 8> Ops;
7234 unsigned NumElts = VT.getVectorNumElements();
7235 for (unsigned i = 0; i < NumElts; ++i) {
7236 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(i));
7238 // Make the DAGCombiner fold the bitcast.
7239 DCI.AddToWorklist(V.getNode());
7241 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64, NumElts);
7242 SDValue BV = DAG.getNode(ISD::BUILD_VECTOR, dl, FloatVT, Ops.data(), NumElts);
7243 return DAG.getNode(ISD::BITCAST, dl, VT, BV);
7246 /// PerformInsertEltCombine - Target-specific dag combine xforms for
7247 /// ISD::INSERT_VECTOR_ELT.
7248 static SDValue PerformInsertEltCombine(SDNode *N,
7249 TargetLowering::DAGCombinerInfo &DCI) {
7250 // Bitcast an i64 load inserted into a vector to f64.
7251 // Otherwise, the i64 value will be legalized to a pair of i32 values.
7252 EVT VT = N->getValueType(0);
7253 SDNode *Elt = N->getOperand(1).getNode();
7254 if (VT.getVectorElementType() != MVT::i64 ||
7255 !ISD::isNormalLoad(Elt) || cast<LoadSDNode>(Elt)->isVolatile())
7258 SelectionDAG &DAG = DCI.DAG;
7259 DebugLoc dl = N->getDebugLoc();
7260 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64,
7261 VT.getVectorNumElements());
7262 SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, N->getOperand(0));
7263 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(1));
7264 // Make the DAGCombiner fold the bitcasts.
7265 DCI.AddToWorklist(Vec.getNode());
7266 DCI.AddToWorklist(V.getNode());
7267 SDValue InsElt = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, FloatVT,
7268 Vec, V, N->getOperand(2));
7269 return DAG.getNode(ISD::BITCAST, dl, VT, InsElt);
7272 /// PerformVECTOR_SHUFFLECombine - Target-specific dag combine xforms for
7273 /// ISD::VECTOR_SHUFFLE.
7274 static SDValue PerformVECTOR_SHUFFLECombine(SDNode *N, SelectionDAG &DAG) {
7275 // The LLVM shufflevector instruction does not require the shuffle mask
7276 // length to match the operand vector length, but ISD::VECTOR_SHUFFLE does
7277 // have that requirement. When translating to ISD::VECTOR_SHUFFLE, if the
7278 // operands do not match the mask length, they are extended by concatenating
7279 // them with undef vectors. That is probably the right thing for other
7280 // targets, but for NEON it is better to concatenate two double-register
7281 // size vector operands into a single quad-register size vector. Do that
7282 // transformation here:
7283 // shuffle(concat(v1, undef), concat(v2, undef)) ->
7284 // shuffle(concat(v1, v2), undef)
7285 SDValue Op0 = N->getOperand(0);
7286 SDValue Op1 = N->getOperand(1);
7287 if (Op0.getOpcode() != ISD::CONCAT_VECTORS ||
7288 Op1.getOpcode() != ISD::CONCAT_VECTORS ||
7289 Op0.getNumOperands() != 2 ||
7290 Op1.getNumOperands() != 2)
7292 SDValue Concat0Op1 = Op0.getOperand(1);
7293 SDValue Concat1Op1 = Op1.getOperand(1);
7294 if (Concat0Op1.getOpcode() != ISD::UNDEF ||
7295 Concat1Op1.getOpcode() != ISD::UNDEF)
7297 // Skip the transformation if any of the types are illegal.
7298 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
7299 EVT VT = N->getValueType(0);
7300 if (!TLI.isTypeLegal(VT) ||
7301 !TLI.isTypeLegal(Concat0Op1.getValueType()) ||
7302 !TLI.isTypeLegal(Concat1Op1.getValueType()))
7305 SDValue NewConcat = DAG.getNode(ISD::CONCAT_VECTORS, N->getDebugLoc(), VT,
7306 Op0.getOperand(0), Op1.getOperand(0));
7307 // Translate the shuffle mask.
7308 SmallVector<int, 16> NewMask;
7309 unsigned NumElts = VT.getVectorNumElements();
7310 unsigned HalfElts = NumElts/2;
7311 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(N);
7312 for (unsigned n = 0; n < NumElts; ++n) {
7313 int MaskElt = SVN->getMaskElt(n);
7315 if (MaskElt < (int)HalfElts)
7317 else if (MaskElt >= (int)NumElts && MaskElt < (int)(NumElts + HalfElts))
7318 NewElt = HalfElts + MaskElt - NumElts;
7319 NewMask.push_back(NewElt);
7321 return DAG.getVectorShuffle(VT, N->getDebugLoc(), NewConcat,
7322 DAG.getUNDEF(VT), NewMask.data());
7325 /// CombineBaseUpdate - Target-specific DAG combine function for VLDDUP and
7326 /// NEON load/store intrinsics to merge base address updates.
7327 static SDValue CombineBaseUpdate(SDNode *N,
7328 TargetLowering::DAGCombinerInfo &DCI) {
7329 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
7332 SelectionDAG &DAG = DCI.DAG;
7333 bool isIntrinsic = (N->getOpcode() == ISD::INTRINSIC_VOID ||
7334 N->getOpcode() == ISD::INTRINSIC_W_CHAIN);
7335 unsigned AddrOpIdx = (isIntrinsic ? 2 : 1);
7336 SDValue Addr = N->getOperand(AddrOpIdx);
7338 // Search for a use of the address operand that is an increment.
7339 for (SDNode::use_iterator UI = Addr.getNode()->use_begin(),
7340 UE = Addr.getNode()->use_end(); UI != UE; ++UI) {
7342 if (User->getOpcode() != ISD::ADD ||
7343 UI.getUse().getResNo() != Addr.getResNo())
7346 // Check that the add is independent of the load/store. Otherwise, folding
7347 // it would create a cycle.
7348 if (User->isPredecessorOf(N) || N->isPredecessorOf(User))
7351 // Find the new opcode for the updating load/store.
7353 bool isLaneOp = false;
7354 unsigned NewOpc = 0;
7355 unsigned NumVecs = 0;
7357 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue();
7359 default: llvm_unreachable("unexpected intrinsic for Neon base update");
7360 case Intrinsic::arm_neon_vld1: NewOpc = ARMISD::VLD1_UPD;
7362 case Intrinsic::arm_neon_vld2: NewOpc = ARMISD::VLD2_UPD;
7364 case Intrinsic::arm_neon_vld3: NewOpc = ARMISD::VLD3_UPD;
7366 case Intrinsic::arm_neon_vld4: NewOpc = ARMISD::VLD4_UPD;
7368 case Intrinsic::arm_neon_vld2lane: NewOpc = ARMISD::VLD2LN_UPD;
7369 NumVecs = 2; isLaneOp = true; break;
7370 case Intrinsic::arm_neon_vld3lane: NewOpc = ARMISD::VLD3LN_UPD;
7371 NumVecs = 3; isLaneOp = true; break;
7372 case Intrinsic::arm_neon_vld4lane: NewOpc = ARMISD::VLD4LN_UPD;
7373 NumVecs = 4; isLaneOp = true; break;
7374 case Intrinsic::arm_neon_vst1: NewOpc = ARMISD::VST1_UPD;
7375 NumVecs = 1; isLoad = false; break;
7376 case Intrinsic::arm_neon_vst2: NewOpc = ARMISD::VST2_UPD;
7377 NumVecs = 2; isLoad = false; break;
7378 case Intrinsic::arm_neon_vst3: NewOpc = ARMISD::VST3_UPD;
7379 NumVecs = 3; isLoad = false; break;
7380 case Intrinsic::arm_neon_vst4: NewOpc = ARMISD::VST4_UPD;
7381 NumVecs = 4; isLoad = false; break;
7382 case Intrinsic::arm_neon_vst2lane: NewOpc = ARMISD::VST2LN_UPD;
7383 NumVecs = 2; isLoad = false; isLaneOp = true; break;
7384 case Intrinsic::arm_neon_vst3lane: NewOpc = ARMISD::VST3LN_UPD;
7385 NumVecs = 3; isLoad = false; isLaneOp = true; break;
7386 case Intrinsic::arm_neon_vst4lane: NewOpc = ARMISD::VST4LN_UPD;
7387 NumVecs = 4; isLoad = false; isLaneOp = true; break;
7391 switch (N->getOpcode()) {
7392 default: llvm_unreachable("unexpected opcode for Neon base update");
7393 case ARMISD::VLD2DUP: NewOpc = ARMISD::VLD2DUP_UPD; NumVecs = 2; break;
7394 case ARMISD::VLD3DUP: NewOpc = ARMISD::VLD3DUP_UPD; NumVecs = 3; break;
7395 case ARMISD::VLD4DUP: NewOpc = ARMISD::VLD4DUP_UPD; NumVecs = 4; break;
7399 // Find the size of memory referenced by the load/store.
7402 VecTy = N->getValueType(0);
7404 VecTy = N->getOperand(AddrOpIdx+1).getValueType();
7405 unsigned NumBytes = NumVecs * VecTy.getSizeInBits() / 8;
7407 NumBytes /= VecTy.getVectorNumElements();
7409 // If the increment is a constant, it must match the memory ref size.
7410 SDValue Inc = User->getOperand(User->getOperand(0) == Addr ? 1 : 0);
7411 if (ConstantSDNode *CInc = dyn_cast<ConstantSDNode>(Inc.getNode())) {
7412 uint64_t IncVal = CInc->getZExtValue();
7413 if (IncVal != NumBytes)
7415 } else if (NumBytes >= 3 * 16) {
7416 // VLD3/4 and VST3/4 for 128-bit vectors are implemented with two
7417 // separate instructions that make it harder to use a non-constant update.
7421 // Create the new updating load/store node.
7423 unsigned NumResultVecs = (isLoad ? NumVecs : 0);
7425 for (n = 0; n < NumResultVecs; ++n)
7427 Tys[n++] = MVT::i32;
7428 Tys[n] = MVT::Other;
7429 SDVTList SDTys = DAG.getVTList(Tys, NumResultVecs+2);
7430 SmallVector<SDValue, 8> Ops;
7431 Ops.push_back(N->getOperand(0)); // incoming chain
7432 Ops.push_back(N->getOperand(AddrOpIdx));
7434 for (unsigned i = AddrOpIdx + 1; i < N->getNumOperands(); ++i) {
7435 Ops.push_back(N->getOperand(i));
7437 MemIntrinsicSDNode *MemInt = cast<MemIntrinsicSDNode>(N);
7438 SDValue UpdN = DAG.getMemIntrinsicNode(NewOpc, N->getDebugLoc(), SDTys,
7439 Ops.data(), Ops.size(),
7440 MemInt->getMemoryVT(),
7441 MemInt->getMemOperand());
7444 std::vector<SDValue> NewResults;
7445 for (unsigned i = 0; i < NumResultVecs; ++i) {
7446 NewResults.push_back(SDValue(UpdN.getNode(), i));
7448 NewResults.push_back(SDValue(UpdN.getNode(), NumResultVecs+1)); // chain
7449 DCI.CombineTo(N, NewResults);
7450 DCI.CombineTo(User, SDValue(UpdN.getNode(), NumResultVecs));
7457 /// CombineVLDDUP - For a VDUPLANE node N, check if its source operand is a
7458 /// vldN-lane (N > 1) intrinsic, and if all the other uses of that intrinsic
7459 /// are also VDUPLANEs. If so, combine them to a vldN-dup operation and
7461 static bool CombineVLDDUP(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) {
7462 SelectionDAG &DAG = DCI.DAG;
7463 EVT VT = N->getValueType(0);
7464 // vldN-dup instructions only support 64-bit vectors for N > 1.
7465 if (!VT.is64BitVector())
7468 // Check if the VDUPLANE operand is a vldN-dup intrinsic.
7469 SDNode *VLD = N->getOperand(0).getNode();
7470 if (VLD->getOpcode() != ISD::INTRINSIC_W_CHAIN)
7472 unsigned NumVecs = 0;
7473 unsigned NewOpc = 0;
7474 unsigned IntNo = cast<ConstantSDNode>(VLD->getOperand(1))->getZExtValue();
7475 if (IntNo == Intrinsic::arm_neon_vld2lane) {
7477 NewOpc = ARMISD::VLD2DUP;
7478 } else if (IntNo == Intrinsic::arm_neon_vld3lane) {
7480 NewOpc = ARMISD::VLD3DUP;
7481 } else if (IntNo == Intrinsic::arm_neon_vld4lane) {
7483 NewOpc = ARMISD::VLD4DUP;
7488 // First check that all the vldN-lane uses are VDUPLANEs and that the lane
7489 // numbers match the load.
7490 unsigned VLDLaneNo =
7491 cast<ConstantSDNode>(VLD->getOperand(NumVecs+3))->getZExtValue();
7492 for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
7494 // Ignore uses of the chain result.
7495 if (UI.getUse().getResNo() == NumVecs)
7498 if (User->getOpcode() != ARMISD::VDUPLANE ||
7499 VLDLaneNo != cast<ConstantSDNode>(User->getOperand(1))->getZExtValue())
7503 // Create the vldN-dup node.
7506 for (n = 0; n < NumVecs; ++n)
7508 Tys[n] = MVT::Other;
7509 SDVTList SDTys = DAG.getVTList(Tys, NumVecs+1);
7510 SDValue Ops[] = { VLD->getOperand(0), VLD->getOperand(2) };
7511 MemIntrinsicSDNode *VLDMemInt = cast<MemIntrinsicSDNode>(VLD);
7512 SDValue VLDDup = DAG.getMemIntrinsicNode(NewOpc, VLD->getDebugLoc(), SDTys,
7513 Ops, 2, VLDMemInt->getMemoryVT(),
7514 VLDMemInt->getMemOperand());
7517 for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
7519 unsigned ResNo = UI.getUse().getResNo();
7520 // Ignore uses of the chain result.
7521 if (ResNo == NumVecs)
7524 DCI.CombineTo(User, SDValue(VLDDup.getNode(), ResNo));
7527 // Now the vldN-lane intrinsic is dead except for its chain result.
7528 // Update uses of the chain.
7529 std::vector<SDValue> VLDDupResults;
7530 for (unsigned n = 0; n < NumVecs; ++n)
7531 VLDDupResults.push_back(SDValue(VLDDup.getNode(), n));
7532 VLDDupResults.push_back(SDValue(VLDDup.getNode(), NumVecs));
7533 DCI.CombineTo(VLD, VLDDupResults);
7538 /// PerformVDUPLANECombine - Target-specific dag combine xforms for
7539 /// ARMISD::VDUPLANE.
7540 static SDValue PerformVDUPLANECombine(SDNode *N,
7541 TargetLowering::DAGCombinerInfo &DCI) {
7542 SDValue Op = N->getOperand(0);
7544 // If the source is a vldN-lane (N > 1) intrinsic, and all the other uses
7545 // of that intrinsic are also VDUPLANEs, combine them to a vldN-dup operation.
7546 if (CombineVLDDUP(N, DCI))
7547 return SDValue(N, 0);
7549 // If the source is already a VMOVIMM or VMVNIMM splat, the VDUPLANE is
7550 // redundant. Ignore bit_converts for now; element sizes are checked below.
7551 while (Op.getOpcode() == ISD::BITCAST)
7552 Op = Op.getOperand(0);
7553 if (Op.getOpcode() != ARMISD::VMOVIMM && Op.getOpcode() != ARMISD::VMVNIMM)
7556 // Make sure the VMOV element size is not bigger than the VDUPLANE elements.
7557 unsigned EltSize = Op.getValueType().getVectorElementType().getSizeInBits();
7558 // The canonical VMOV for a zero vector uses a 32-bit element size.
7559 unsigned Imm = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
7561 if (ARM_AM::decodeNEONModImm(Imm, EltBits) == 0)
7563 EVT VT = N->getValueType(0);
7564 if (EltSize > VT.getVectorElementType().getSizeInBits())
7567 return DCI.DAG.getNode(ISD::BITCAST, N->getDebugLoc(), VT, Op);
7570 // isConstVecPow2 - Return true if each vector element is a power of 2, all
7571 // elements are the same constant, C, and Log2(C) ranges from 1 to 32.
7572 static bool isConstVecPow2(SDValue ConstVec, bool isSigned, uint64_t &C)
7576 for (unsigned I = 0, E = ConstVec.getValueType().getVectorNumElements();
7578 ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(ConstVec.getOperand(I));
7583 APFloat APF = C->getValueAPF();
7584 if (APF.convertToInteger(&cN, 64, isSigned, APFloat::rmTowardZero, &isExact)
7585 != APFloat::opOK || !isExact)
7588 c0 = (I == 0) ? cN : c0;
7589 if (!isPowerOf2_64(cN) || c0 != cN || Log2_64(c0) < 1 || Log2_64(c0) > 32)
7596 /// PerformVCVTCombine - VCVT (floating-point to fixed-point, Advanced SIMD)
7597 /// can replace combinations of VMUL and VCVT (floating-point to integer)
7598 /// when the VMUL has a constant operand that is a power of 2.
7600 /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>):
7601 /// vmul.f32 d16, d17, d16
7602 /// vcvt.s32.f32 d16, d16
7604 /// vcvt.s32.f32 d16, d16, #3
7605 static SDValue PerformVCVTCombine(SDNode *N,
7606 TargetLowering::DAGCombinerInfo &DCI,
7607 const ARMSubtarget *Subtarget) {
7608 SelectionDAG &DAG = DCI.DAG;
7609 SDValue Op = N->getOperand(0);
7611 if (!Subtarget->hasNEON() || !Op.getValueType().isVector() ||
7612 Op.getOpcode() != ISD::FMUL)
7616 SDValue N0 = Op->getOperand(0);
7617 SDValue ConstVec = Op->getOperand(1);
7618 bool isSigned = N->getOpcode() == ISD::FP_TO_SINT;
7620 if (ConstVec.getOpcode() != ISD::BUILD_VECTOR ||
7621 !isConstVecPow2(ConstVec, isSigned, C))
7624 unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfp2fxs :
7625 Intrinsic::arm_neon_vcvtfp2fxu;
7626 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, N->getDebugLoc(),
7628 DAG.getConstant(IntrinsicOpcode, MVT::i32), N0,
7629 DAG.getConstant(Log2_64(C), MVT::i32));
7632 /// PerformVDIVCombine - VCVT (fixed-point to floating-point, Advanced SIMD)
7633 /// can replace combinations of VCVT (integer to floating-point) and VDIV
7634 /// when the VDIV has a constant operand that is a power of 2.
7636 /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>):
7637 /// vcvt.f32.s32 d16, d16
7638 /// vdiv.f32 d16, d17, d16
7640 /// vcvt.f32.s32 d16, d16, #3
7641 static SDValue PerformVDIVCombine(SDNode *N,
7642 TargetLowering::DAGCombinerInfo &DCI,
7643 const ARMSubtarget *Subtarget) {
7644 SelectionDAG &DAG = DCI.DAG;
7645 SDValue Op = N->getOperand(0);
7646 unsigned OpOpcode = Op.getNode()->getOpcode();
7648 if (!Subtarget->hasNEON() || !N->getValueType(0).isVector() ||
7649 (OpOpcode != ISD::SINT_TO_FP && OpOpcode != ISD::UINT_TO_FP))
7653 SDValue ConstVec = N->getOperand(1);
7654 bool isSigned = OpOpcode == ISD::SINT_TO_FP;
7656 if (ConstVec.getOpcode() != ISD::BUILD_VECTOR ||
7657 !isConstVecPow2(ConstVec, isSigned, C))
7660 unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfxs2fp :
7661 Intrinsic::arm_neon_vcvtfxu2fp;
7662 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, N->getDebugLoc(),
7664 DAG.getConstant(IntrinsicOpcode, MVT::i32),
7665 Op.getOperand(0), DAG.getConstant(Log2_64(C), MVT::i32));
7668 /// Getvshiftimm - Check if this is a valid build_vector for the immediate
7669 /// operand of a vector shift operation, where all the elements of the
7670 /// build_vector must have the same constant integer value.
7671 static bool getVShiftImm(SDValue Op, unsigned ElementBits, int64_t &Cnt) {
7672 // Ignore bit_converts.
7673 while (Op.getOpcode() == ISD::BITCAST)
7674 Op = Op.getOperand(0);
7675 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
7676 APInt SplatBits, SplatUndef;
7677 unsigned SplatBitSize;
7679 if (! BVN || ! BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize,
7680 HasAnyUndefs, ElementBits) ||
7681 SplatBitSize > ElementBits)
7683 Cnt = SplatBits.getSExtValue();
7687 /// isVShiftLImm - Check if this is a valid build_vector for the immediate
7688 /// operand of a vector shift left operation. That value must be in the range:
7689 /// 0 <= Value < ElementBits for a left shift; or
7690 /// 0 <= Value <= ElementBits for a long left shift.
7691 static bool isVShiftLImm(SDValue Op, EVT VT, bool isLong, int64_t &Cnt) {
7692 assert(VT.isVector() && "vector shift count is not a vector type");
7693 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
7694 if (! getVShiftImm(Op, ElementBits, Cnt))
7696 return (Cnt >= 0 && (isLong ? Cnt-1 : Cnt) < ElementBits);
7699 /// isVShiftRImm - Check if this is a valid build_vector for the immediate
7700 /// operand of a vector shift right operation. For a shift opcode, the value
7701 /// is positive, but for an intrinsic the value count must be negative. The
7702 /// absolute value must be in the range:
7703 /// 1 <= |Value| <= ElementBits for a right shift; or
7704 /// 1 <= |Value| <= ElementBits/2 for a narrow right shift.
7705 static bool isVShiftRImm(SDValue Op, EVT VT, bool isNarrow, bool isIntrinsic,
7707 assert(VT.isVector() && "vector shift count is not a vector type");
7708 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
7709 if (! getVShiftImm(Op, ElementBits, Cnt))
7713 return (Cnt >= 1 && Cnt <= (isNarrow ? ElementBits/2 : ElementBits));
7716 /// PerformIntrinsicCombine - ARM-specific DAG combining for intrinsics.
7717 static SDValue PerformIntrinsicCombine(SDNode *N, SelectionDAG &DAG) {
7718 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
7721 // Don't do anything for most intrinsics.
7724 // Vector shifts: check for immediate versions and lower them.
7725 // Note: This is done during DAG combining instead of DAG legalizing because
7726 // the build_vectors for 64-bit vector element shift counts are generally
7727 // not legal, and it is hard to see their values after they get legalized to
7728 // loads from a constant pool.
7729 case Intrinsic::arm_neon_vshifts:
7730 case Intrinsic::arm_neon_vshiftu:
7731 case Intrinsic::arm_neon_vshiftls:
7732 case Intrinsic::arm_neon_vshiftlu:
7733 case Intrinsic::arm_neon_vshiftn:
7734 case Intrinsic::arm_neon_vrshifts:
7735 case Intrinsic::arm_neon_vrshiftu:
7736 case Intrinsic::arm_neon_vrshiftn:
7737 case Intrinsic::arm_neon_vqshifts:
7738 case Intrinsic::arm_neon_vqshiftu:
7739 case Intrinsic::arm_neon_vqshiftsu:
7740 case Intrinsic::arm_neon_vqshiftns:
7741 case Intrinsic::arm_neon_vqshiftnu:
7742 case Intrinsic::arm_neon_vqshiftnsu:
7743 case Intrinsic::arm_neon_vqrshiftns:
7744 case Intrinsic::arm_neon_vqrshiftnu:
7745 case Intrinsic::arm_neon_vqrshiftnsu: {
7746 EVT VT = N->getOperand(1).getValueType();
7748 unsigned VShiftOpc = 0;
7751 case Intrinsic::arm_neon_vshifts:
7752 case Intrinsic::arm_neon_vshiftu:
7753 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt)) {
7754 VShiftOpc = ARMISD::VSHL;
7757 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt)) {
7758 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshifts ?
7759 ARMISD::VSHRs : ARMISD::VSHRu);
7764 case Intrinsic::arm_neon_vshiftls:
7765 case Intrinsic::arm_neon_vshiftlu:
7766 if (isVShiftLImm(N->getOperand(2), VT, true, Cnt))
7768 llvm_unreachable("invalid shift count for vshll intrinsic");
7770 case Intrinsic::arm_neon_vrshifts:
7771 case Intrinsic::arm_neon_vrshiftu:
7772 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt))
7776 case Intrinsic::arm_neon_vqshifts:
7777 case Intrinsic::arm_neon_vqshiftu:
7778 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
7782 case Intrinsic::arm_neon_vqshiftsu:
7783 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
7785 llvm_unreachable("invalid shift count for vqshlu intrinsic");
7787 case Intrinsic::arm_neon_vshiftn:
7788 case Intrinsic::arm_neon_vrshiftn:
7789 case Intrinsic::arm_neon_vqshiftns:
7790 case Intrinsic::arm_neon_vqshiftnu:
7791 case Intrinsic::arm_neon_vqshiftnsu:
7792 case Intrinsic::arm_neon_vqrshiftns:
7793 case Intrinsic::arm_neon_vqrshiftnu:
7794 case Intrinsic::arm_neon_vqrshiftnsu:
7795 // Narrowing shifts require an immediate right shift.
7796 if (isVShiftRImm(N->getOperand(2), VT, true, true, Cnt))
7798 llvm_unreachable("invalid shift count for narrowing vector shift "
7802 llvm_unreachable("unhandled vector shift");
7806 case Intrinsic::arm_neon_vshifts:
7807 case Intrinsic::arm_neon_vshiftu:
7808 // Opcode already set above.
7810 case Intrinsic::arm_neon_vshiftls:
7811 case Intrinsic::arm_neon_vshiftlu:
7812 if (Cnt == VT.getVectorElementType().getSizeInBits())
7813 VShiftOpc = ARMISD::VSHLLi;
7815 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshiftls ?
7816 ARMISD::VSHLLs : ARMISD::VSHLLu);
7818 case Intrinsic::arm_neon_vshiftn:
7819 VShiftOpc = ARMISD::VSHRN; break;
7820 case Intrinsic::arm_neon_vrshifts:
7821 VShiftOpc = ARMISD::VRSHRs; break;
7822 case Intrinsic::arm_neon_vrshiftu:
7823 VShiftOpc = ARMISD::VRSHRu; break;
7824 case Intrinsic::arm_neon_vrshiftn:
7825 VShiftOpc = ARMISD::VRSHRN; break;
7826 case Intrinsic::arm_neon_vqshifts:
7827 VShiftOpc = ARMISD::VQSHLs; break;
7828 case Intrinsic::arm_neon_vqshiftu:
7829 VShiftOpc = ARMISD::VQSHLu; break;
7830 case Intrinsic::arm_neon_vqshiftsu:
7831 VShiftOpc = ARMISD::VQSHLsu; break;
7832 case Intrinsic::arm_neon_vqshiftns:
7833 VShiftOpc = ARMISD::VQSHRNs; break;
7834 case Intrinsic::arm_neon_vqshiftnu:
7835 VShiftOpc = ARMISD::VQSHRNu; break;
7836 case Intrinsic::arm_neon_vqshiftnsu:
7837 VShiftOpc = ARMISD::VQSHRNsu; break;
7838 case Intrinsic::arm_neon_vqrshiftns:
7839 VShiftOpc = ARMISD::VQRSHRNs; break;
7840 case Intrinsic::arm_neon_vqrshiftnu:
7841 VShiftOpc = ARMISD::VQRSHRNu; break;
7842 case Intrinsic::arm_neon_vqrshiftnsu:
7843 VShiftOpc = ARMISD::VQRSHRNsu; break;
7846 return DAG.getNode(VShiftOpc, N->getDebugLoc(), N->getValueType(0),
7847 N->getOperand(1), DAG.getConstant(Cnt, MVT::i32));
7850 case Intrinsic::arm_neon_vshiftins: {
7851 EVT VT = N->getOperand(1).getValueType();
7853 unsigned VShiftOpc = 0;
7855 if (isVShiftLImm(N->getOperand(3), VT, false, Cnt))
7856 VShiftOpc = ARMISD::VSLI;
7857 else if (isVShiftRImm(N->getOperand(3), VT, false, true, Cnt))
7858 VShiftOpc = ARMISD::VSRI;
7860 llvm_unreachable("invalid shift count for vsli/vsri intrinsic");
7863 return DAG.getNode(VShiftOpc, N->getDebugLoc(), N->getValueType(0),
7864 N->getOperand(1), N->getOperand(2),
7865 DAG.getConstant(Cnt, MVT::i32));
7868 case Intrinsic::arm_neon_vqrshifts:
7869 case Intrinsic::arm_neon_vqrshiftu:
7870 // No immediate versions of these to check for.
7877 /// PerformShiftCombine - Checks for immediate versions of vector shifts and
7878 /// lowers them. As with the vector shift intrinsics, this is done during DAG
7879 /// combining instead of DAG legalizing because the build_vectors for 64-bit
7880 /// vector element shift counts are generally not legal, and it is hard to see
7881 /// their values after they get legalized to loads from a constant pool.
7882 static SDValue PerformShiftCombine(SDNode *N, SelectionDAG &DAG,
7883 const ARMSubtarget *ST) {
7884 EVT VT = N->getValueType(0);
7886 // Nothing to be done for scalar shifts.
7887 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
7888 if (!VT.isVector() || !TLI.isTypeLegal(VT))
7891 assert(ST->hasNEON() && "unexpected vector shift");
7894 switch (N->getOpcode()) {
7895 default: llvm_unreachable("unexpected shift opcode");
7898 if (isVShiftLImm(N->getOperand(1), VT, false, Cnt))
7899 return DAG.getNode(ARMISD::VSHL, N->getDebugLoc(), VT, N->getOperand(0),
7900 DAG.getConstant(Cnt, MVT::i32));
7905 if (isVShiftRImm(N->getOperand(1), VT, false, false, Cnt)) {
7906 unsigned VShiftOpc = (N->getOpcode() == ISD::SRA ?
7907 ARMISD::VSHRs : ARMISD::VSHRu);
7908 return DAG.getNode(VShiftOpc, N->getDebugLoc(), VT, N->getOperand(0),
7909 DAG.getConstant(Cnt, MVT::i32));
7915 /// PerformExtendCombine - Target-specific DAG combining for ISD::SIGN_EXTEND,
7916 /// ISD::ZERO_EXTEND, and ISD::ANY_EXTEND.
7917 static SDValue PerformExtendCombine(SDNode *N, SelectionDAG &DAG,
7918 const ARMSubtarget *ST) {
7919 SDValue N0 = N->getOperand(0);
7921 // Check for sign- and zero-extensions of vector extract operations of 8-
7922 // and 16-bit vector elements. NEON supports these directly. They are
7923 // handled during DAG combining because type legalization will promote them
7924 // to 32-bit types and it is messy to recognize the operations after that.
7925 if (ST->hasNEON() && N0.getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
7926 SDValue Vec = N0.getOperand(0);
7927 SDValue Lane = N0.getOperand(1);
7928 EVT VT = N->getValueType(0);
7929 EVT EltVT = N0.getValueType();
7930 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
7932 if (VT == MVT::i32 &&
7933 (EltVT == MVT::i8 || EltVT == MVT::i16) &&
7934 TLI.isTypeLegal(Vec.getValueType()) &&
7935 isa<ConstantSDNode>(Lane)) {
7938 switch (N->getOpcode()) {
7939 default: llvm_unreachable("unexpected opcode");
7940 case ISD::SIGN_EXTEND:
7941 Opc = ARMISD::VGETLANEs;
7943 case ISD::ZERO_EXTEND:
7944 case ISD::ANY_EXTEND:
7945 Opc = ARMISD::VGETLANEu;
7948 return DAG.getNode(Opc, N->getDebugLoc(), VT, Vec, Lane);
7955 /// PerformSELECT_CCCombine - Target-specific DAG combining for ISD::SELECT_CC
7956 /// to match f32 max/min patterns to use NEON vmax/vmin instructions.
7957 static SDValue PerformSELECT_CCCombine(SDNode *N, SelectionDAG &DAG,
7958 const ARMSubtarget *ST) {
7959 // If the target supports NEON, try to use vmax/vmin instructions for f32
7960 // selects like "x < y ? x : y". Unless the NoNaNsFPMath option is set,
7961 // be careful about NaNs: NEON's vmax/vmin return NaN if either operand is
7962 // a NaN; only do the transformation when it matches that behavior.
7964 // For now only do this when using NEON for FP operations; if using VFP, it
7965 // is not obvious that the benefit outweighs the cost of switching to the
7967 if (!ST->hasNEON() || !ST->useNEONForSinglePrecisionFP() ||
7968 N->getValueType(0) != MVT::f32)
7971 SDValue CondLHS = N->getOperand(0);
7972 SDValue CondRHS = N->getOperand(1);
7973 SDValue LHS = N->getOperand(2);
7974 SDValue RHS = N->getOperand(3);
7975 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(4))->get();
7977 unsigned Opcode = 0;
7979 if (DAG.isEqualTo(LHS, CondLHS) && DAG.isEqualTo(RHS, CondRHS)) {
7980 IsReversed = false; // x CC y ? x : y
7981 } else if (DAG.isEqualTo(LHS, CondRHS) && DAG.isEqualTo(RHS, CondLHS)) {
7982 IsReversed = true ; // x CC y ? y : x
7996 // If LHS is NaN, an ordered comparison will be false and the result will
7997 // be the RHS, but vmin(NaN, RHS) = NaN. Avoid this by checking that LHS
7998 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
7999 IsUnordered = (CC == ISD::SETULT || CC == ISD::SETULE);
8000 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
8002 // For less-than-or-equal comparisons, "+0 <= -0" will be true but vmin
8003 // will return -0, so vmin can only be used for unsafe math or if one of
8004 // the operands is known to be nonzero.
8005 if ((CC == ISD::SETLE || CC == ISD::SETOLE || CC == ISD::SETULE) &&
8006 !DAG.getTarget().Options.UnsafeFPMath &&
8007 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
8009 Opcode = IsReversed ? ARMISD::FMAX : ARMISD::FMIN;
8018 // If LHS is NaN, an ordered comparison will be false and the result will
8019 // be the RHS, but vmax(NaN, RHS) = NaN. Avoid this by checking that LHS
8020 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
8021 IsUnordered = (CC == ISD::SETUGT || CC == ISD::SETUGE);
8022 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
8024 // For greater-than-or-equal comparisons, "-0 >= +0" will be true but vmax
8025 // will return +0, so vmax can only be used for unsafe math or if one of
8026 // the operands is known to be nonzero.
8027 if ((CC == ISD::SETGE || CC == ISD::SETOGE || CC == ISD::SETUGE) &&
8028 !DAG.getTarget().Options.UnsafeFPMath &&
8029 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
8031 Opcode = IsReversed ? ARMISD::FMIN : ARMISD::FMAX;
8037 return DAG.getNode(Opcode, N->getDebugLoc(), N->getValueType(0), LHS, RHS);
8040 /// PerformCMOVCombine - Target-specific DAG combining for ARMISD::CMOV.
8042 ARMTargetLowering::PerformCMOVCombine(SDNode *N, SelectionDAG &DAG) const {
8043 SDValue Cmp = N->getOperand(4);
8044 if (Cmp.getOpcode() != ARMISD::CMPZ)
8045 // Only looking at EQ and NE cases.
8048 EVT VT = N->getValueType(0);
8049 DebugLoc dl = N->getDebugLoc();
8050 SDValue LHS = Cmp.getOperand(0);
8051 SDValue RHS = Cmp.getOperand(1);
8052 SDValue FalseVal = N->getOperand(0);
8053 SDValue TrueVal = N->getOperand(1);
8054 SDValue ARMcc = N->getOperand(2);
8055 ARMCC::CondCodes CC =
8056 (ARMCC::CondCodes)cast<ConstantSDNode>(ARMcc)->getZExtValue();
8074 /// FIXME: Turn this into a target neutral optimization?
8076 if (CC == ARMCC::NE && FalseVal == RHS && FalseVal != LHS) {
8077 Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, TrueVal, ARMcc,
8078 N->getOperand(3), Cmp);
8079 } else if (CC == ARMCC::EQ && TrueVal == RHS) {
8081 SDValue NewCmp = getARMCmp(LHS, RHS, ISD::SETNE, ARMcc, DAG, dl);
8082 Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, FalseVal, ARMcc,
8083 N->getOperand(3), NewCmp);
8086 if (Res.getNode()) {
8087 APInt KnownZero, KnownOne;
8088 APInt Mask = APInt::getAllOnesValue(VT.getScalarType().getSizeInBits());
8089 DAG.ComputeMaskedBits(SDValue(N,0), Mask, KnownZero, KnownOne);
8090 // Capture demanded bits information that would be otherwise lost.
8091 if (KnownZero == 0xfffffffe)
8092 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
8093 DAG.getValueType(MVT::i1));
8094 else if (KnownZero == 0xffffff00)
8095 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
8096 DAG.getValueType(MVT::i8));
8097 else if (KnownZero == 0xffff0000)
8098 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
8099 DAG.getValueType(MVT::i16));
8105 SDValue ARMTargetLowering::PerformDAGCombine(SDNode *N,
8106 DAGCombinerInfo &DCI) const {
8107 switch (N->getOpcode()) {
8109 case ISD::ADD: return PerformADDCombine(N, DCI, Subtarget);
8110 case ISD::SUB: return PerformSUBCombine(N, DCI);
8111 case ISD::MUL: return PerformMULCombine(N, DCI, Subtarget);
8112 case ISD::OR: return PerformORCombine(N, DCI, Subtarget);
8113 case ISD::AND: return PerformANDCombine(N, DCI);
8114 case ARMISD::BFI: return PerformBFICombine(N, DCI);
8115 case ARMISD::VMOVRRD: return PerformVMOVRRDCombine(N, DCI);
8116 case ARMISD::VMOVDRR: return PerformVMOVDRRCombine(N, DCI.DAG);
8117 case ISD::STORE: return PerformSTORECombine(N, DCI);
8118 case ISD::BUILD_VECTOR: return PerformBUILD_VECTORCombine(N, DCI);
8119 case ISD::INSERT_VECTOR_ELT: return PerformInsertEltCombine(N, DCI);
8120 case ISD::VECTOR_SHUFFLE: return PerformVECTOR_SHUFFLECombine(N, DCI.DAG);
8121 case ARMISD::VDUPLANE: return PerformVDUPLANECombine(N, DCI);
8122 case ISD::FP_TO_SINT:
8123 case ISD::FP_TO_UINT: return PerformVCVTCombine(N, DCI, Subtarget);
8124 case ISD::FDIV: return PerformVDIVCombine(N, DCI, Subtarget);
8125 case ISD::INTRINSIC_WO_CHAIN: return PerformIntrinsicCombine(N, DCI.DAG);
8128 case ISD::SRL: return PerformShiftCombine(N, DCI.DAG, Subtarget);
8129 case ISD::SIGN_EXTEND:
8130 case ISD::ZERO_EXTEND:
8131 case ISD::ANY_EXTEND: return PerformExtendCombine(N, DCI.DAG, Subtarget);
8132 case ISD::SELECT_CC: return PerformSELECT_CCCombine(N, DCI.DAG, Subtarget);
8133 case ARMISD::CMOV: return PerformCMOVCombine(N, DCI.DAG);
8134 case ARMISD::VLD2DUP:
8135 case ARMISD::VLD3DUP:
8136 case ARMISD::VLD4DUP:
8137 return CombineBaseUpdate(N, DCI);
8138 case ISD::INTRINSIC_VOID:
8139 case ISD::INTRINSIC_W_CHAIN:
8140 switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
8141 case Intrinsic::arm_neon_vld1:
8142 case Intrinsic::arm_neon_vld2:
8143 case Intrinsic::arm_neon_vld3:
8144 case Intrinsic::arm_neon_vld4:
8145 case Intrinsic::arm_neon_vld2lane:
8146 case Intrinsic::arm_neon_vld3lane:
8147 case Intrinsic::arm_neon_vld4lane:
8148 case Intrinsic::arm_neon_vst1:
8149 case Intrinsic::arm_neon_vst2:
8150 case Intrinsic::arm_neon_vst3:
8151 case Intrinsic::arm_neon_vst4:
8152 case Intrinsic::arm_neon_vst2lane:
8153 case Intrinsic::arm_neon_vst3lane:
8154 case Intrinsic::arm_neon_vst4lane:
8155 return CombineBaseUpdate(N, DCI);
8163 bool ARMTargetLowering::isDesirableToTransformToIntegerOp(unsigned Opc,
8165 return (VT == MVT::f32) && (Opc == ISD::LOAD || Opc == ISD::STORE);
8168 bool ARMTargetLowering::allowsUnalignedMemoryAccesses(EVT VT) const {
8169 if (!Subtarget->allowsUnalignedMem())
8172 switch (VT.getSimpleVT().SimpleTy) {
8179 // FIXME: VLD1 etc with standard alignment is legal.
8183 static bool memOpAlign(unsigned DstAlign, unsigned SrcAlign,
8184 unsigned AlignCheck) {
8185 return ((SrcAlign == 0 || SrcAlign % AlignCheck == 0) &&
8186 (DstAlign == 0 || DstAlign % AlignCheck == 0));
8189 EVT ARMTargetLowering::getOptimalMemOpType(uint64_t Size,
8190 unsigned DstAlign, unsigned SrcAlign,
8193 MachineFunction &MF) const {
8194 const Function *F = MF.getFunction();
8196 // See if we can use NEON instructions for this...
8198 !F->hasFnAttr(Attribute::NoImplicitFloat) &&
8199 Subtarget->hasNEON()) {
8200 if (memOpAlign(SrcAlign, DstAlign, 16) && Size >= 16) {
8202 } else if (memOpAlign(SrcAlign, DstAlign, 8) && Size >= 8) {
8207 // Lowering to i32/i16 if the size permits.
8210 } else if (Size >= 2) {
8214 // Let the target-independent logic figure it out.
8218 static bool isLegalT1AddressImmediate(int64_t V, EVT VT) {
8223 switch (VT.getSimpleVT().SimpleTy) {
8224 default: return false;
8239 if ((V & (Scale - 1)) != 0)
8242 return V == (V & ((1LL << 5) - 1));
8245 static bool isLegalT2AddressImmediate(int64_t V, EVT VT,
8246 const ARMSubtarget *Subtarget) {
8253 switch (VT.getSimpleVT().SimpleTy) {
8254 default: return false;
8259 // + imm12 or - imm8
8261 return V == (V & ((1LL << 8) - 1));
8262 return V == (V & ((1LL << 12) - 1));
8265 // Same as ARM mode. FIXME: NEON?
8266 if (!Subtarget->hasVFP2())
8271 return V == (V & ((1LL << 8) - 1));
8275 /// isLegalAddressImmediate - Return true if the integer value can be used
8276 /// as the offset of the target addressing mode for load / store of the
8278 static bool isLegalAddressImmediate(int64_t V, EVT VT,
8279 const ARMSubtarget *Subtarget) {
8286 if (Subtarget->isThumb1Only())
8287 return isLegalT1AddressImmediate(V, VT);
8288 else if (Subtarget->isThumb2())
8289 return isLegalT2AddressImmediate(V, VT, Subtarget);
8294 switch (VT.getSimpleVT().SimpleTy) {
8295 default: return false;
8300 return V == (V & ((1LL << 12) - 1));
8303 return V == (V & ((1LL << 8) - 1));
8306 if (!Subtarget->hasVFP2()) // FIXME: NEON?
8311 return V == (V & ((1LL << 8) - 1));
8315 bool ARMTargetLowering::isLegalT2ScaledAddressingMode(const AddrMode &AM,
8317 int Scale = AM.Scale;
8321 switch (VT.getSimpleVT().SimpleTy) {
8322 default: return false;
8331 return Scale == 2 || Scale == 4 || Scale == 8;
8334 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
8338 // Note, we allow "void" uses (basically, uses that aren't loads or
8339 // stores), because arm allows folding a scale into many arithmetic
8340 // operations. This should be made more precise and revisited later.
8342 // Allow r << imm, but the imm has to be a multiple of two.
8343 if (Scale & 1) return false;
8344 return isPowerOf2_32(Scale);
8348 /// isLegalAddressingMode - Return true if the addressing mode represented
8349 /// by AM is legal for this target, for a load/store of the specified type.
8350 bool ARMTargetLowering::isLegalAddressingMode(const AddrMode &AM,
8352 EVT VT = getValueType(Ty, true);
8353 if (!isLegalAddressImmediate(AM.BaseOffs, VT, Subtarget))
8356 // Can never fold addr of global into load/store.
8361 case 0: // no scale reg, must be "r+i" or "r", or "i".
8364 if (Subtarget->isThumb1Only())
8368 // ARM doesn't support any R+R*scale+imm addr modes.
8375 if (Subtarget->isThumb2())
8376 return isLegalT2ScaledAddressingMode(AM, VT);
8378 int Scale = AM.Scale;
8379 switch (VT.getSimpleVT().SimpleTy) {
8380 default: return false;
8384 if (Scale < 0) Scale = -Scale;
8388 return isPowerOf2_32(Scale & ~1);
8392 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
8397 // Note, we allow "void" uses (basically, uses that aren't loads or
8398 // stores), because arm allows folding a scale into many arithmetic
8399 // operations. This should be made more precise and revisited later.
8401 // Allow r << imm, but the imm has to be a multiple of two.
8402 if (Scale & 1) return false;
8403 return isPowerOf2_32(Scale);
8409 /// isLegalICmpImmediate - Return true if the specified immediate is legal
8410 /// icmp immediate, that is the target has icmp instructions which can compare
8411 /// a register against the immediate without having to materialize the
8412 /// immediate into a register.
8413 bool ARMTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
8414 if (!Subtarget->isThumb())
8415 return ARM_AM::getSOImmVal(Imm) != -1;
8416 if (Subtarget->isThumb2())
8417 return ARM_AM::getT2SOImmVal(Imm) != -1;
8418 return Imm >= 0 && Imm <= 255;
8421 /// isLegalAddImmediate - Return true if the specified immediate is legal
8422 /// add immediate, that is the target has add instructions which can add
8423 /// a register with the immediate without having to materialize the
8424 /// immediate into a register.
8425 bool ARMTargetLowering::isLegalAddImmediate(int64_t Imm) const {
8426 return ARM_AM::getSOImmVal(Imm) != -1;
8429 static bool getARMIndexedAddressParts(SDNode *Ptr, EVT VT,
8430 bool isSEXTLoad, SDValue &Base,
8431 SDValue &Offset, bool &isInc,
8432 SelectionDAG &DAG) {
8433 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
8436 if (VT == MVT::i16 || ((VT == MVT::i8 || VT == MVT::i1) && isSEXTLoad)) {
8438 Base = Ptr->getOperand(0);
8439 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
8440 int RHSC = (int)RHS->getZExtValue();
8441 if (RHSC < 0 && RHSC > -256) {
8442 assert(Ptr->getOpcode() == ISD::ADD);
8444 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
8448 isInc = (Ptr->getOpcode() == ISD::ADD);
8449 Offset = Ptr->getOperand(1);
8451 } else if (VT == MVT::i32 || VT == MVT::i8 || VT == MVT::i1) {
8453 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
8454 int RHSC = (int)RHS->getZExtValue();
8455 if (RHSC < 0 && RHSC > -0x1000) {
8456 assert(Ptr->getOpcode() == ISD::ADD);
8458 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
8459 Base = Ptr->getOperand(0);
8464 if (Ptr->getOpcode() == ISD::ADD) {
8466 ARM_AM::ShiftOpc ShOpcVal=
8467 ARM_AM::getShiftOpcForNode(Ptr->getOperand(0).getOpcode());
8468 if (ShOpcVal != ARM_AM::no_shift) {
8469 Base = Ptr->getOperand(1);
8470 Offset = Ptr->getOperand(0);
8472 Base = Ptr->getOperand(0);
8473 Offset = Ptr->getOperand(1);
8478 isInc = (Ptr->getOpcode() == ISD::ADD);
8479 Base = Ptr->getOperand(0);
8480 Offset = Ptr->getOperand(1);
8484 // FIXME: Use VLDM / VSTM to emulate indexed FP load / store.
8488 static bool getT2IndexedAddressParts(SDNode *Ptr, EVT VT,
8489 bool isSEXTLoad, SDValue &Base,
8490 SDValue &Offset, bool &isInc,
8491 SelectionDAG &DAG) {
8492 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
8495 Base = Ptr->getOperand(0);
8496 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
8497 int RHSC = (int)RHS->getZExtValue();
8498 if (RHSC < 0 && RHSC > -0x100) { // 8 bits.
8499 assert(Ptr->getOpcode() == ISD::ADD);
8501 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
8503 } else if (RHSC > 0 && RHSC < 0x100) { // 8 bit, no zero.
8504 isInc = Ptr->getOpcode() == ISD::ADD;
8505 Offset = DAG.getConstant(RHSC, RHS->getValueType(0));
8513 /// getPreIndexedAddressParts - returns true by value, base pointer and
8514 /// offset pointer and addressing mode by reference if the node's address
8515 /// can be legally represented as pre-indexed load / store address.
8517 ARMTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base,
8519 ISD::MemIndexedMode &AM,
8520 SelectionDAG &DAG) const {
8521 if (Subtarget->isThumb1Only())
8526 bool isSEXTLoad = false;
8527 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
8528 Ptr = LD->getBasePtr();
8529 VT = LD->getMemoryVT();
8530 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
8531 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
8532 Ptr = ST->getBasePtr();
8533 VT = ST->getMemoryVT();
8538 bool isLegal = false;
8539 if (Subtarget->isThumb2())
8540 isLegal = getT2IndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
8541 Offset, isInc, DAG);
8543 isLegal = getARMIndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
8544 Offset, isInc, DAG);
8548 AM = isInc ? ISD::PRE_INC : ISD::PRE_DEC;
8552 /// getPostIndexedAddressParts - returns true by value, base pointer and
8553 /// offset pointer and addressing mode by reference if this node can be
8554 /// combined with a load / store to form a post-indexed load / store.
8555 bool ARMTargetLowering::getPostIndexedAddressParts(SDNode *N, SDNode *Op,
8558 ISD::MemIndexedMode &AM,
8559 SelectionDAG &DAG) const {
8560 if (Subtarget->isThumb1Only())
8565 bool isSEXTLoad = false;
8566 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
8567 VT = LD->getMemoryVT();
8568 Ptr = LD->getBasePtr();
8569 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
8570 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
8571 VT = ST->getMemoryVT();
8572 Ptr = ST->getBasePtr();
8577 bool isLegal = false;
8578 if (Subtarget->isThumb2())
8579 isLegal = getT2IndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
8582 isLegal = getARMIndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
8588 // Swap base ptr and offset to catch more post-index load / store when
8589 // it's legal. In Thumb2 mode, offset must be an immediate.
8590 if (Ptr == Offset && Op->getOpcode() == ISD::ADD &&
8591 !Subtarget->isThumb2())
8592 std::swap(Base, Offset);
8594 // Post-indexed load / store update the base pointer.
8599 AM = isInc ? ISD::POST_INC : ISD::POST_DEC;
8603 void ARMTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
8607 const SelectionDAG &DAG,
8608 unsigned Depth) const {
8609 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0);
8610 switch (Op.getOpcode()) {
8612 case ARMISD::CMOV: {
8613 // Bits are known zero/one if known on the LHS and RHS.
8614 DAG.ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero, KnownOne, Depth+1);
8615 if (KnownZero == 0 && KnownOne == 0) return;
8617 APInt KnownZeroRHS, KnownOneRHS;
8618 DAG.ComputeMaskedBits(Op.getOperand(1), Mask,
8619 KnownZeroRHS, KnownOneRHS, Depth+1);
8620 KnownZero &= KnownZeroRHS;
8621 KnownOne &= KnownOneRHS;
8627 //===----------------------------------------------------------------------===//
8628 // ARM Inline Assembly Support
8629 //===----------------------------------------------------------------------===//
8631 bool ARMTargetLowering::ExpandInlineAsm(CallInst *CI) const {
8632 // Looking for "rev" which is V6+.
8633 if (!Subtarget->hasV6Ops())
8636 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
8637 std::string AsmStr = IA->getAsmString();
8638 SmallVector<StringRef, 4> AsmPieces;
8639 SplitString(AsmStr, AsmPieces, ";\n");
8641 switch (AsmPieces.size()) {
8642 default: return false;
8644 AsmStr = AsmPieces[0];
8646 SplitString(AsmStr, AsmPieces, " \t,");
8649 if (AsmPieces.size() == 3 &&
8650 AsmPieces[0] == "rev" && AsmPieces[1] == "$0" && AsmPieces[2] == "$1" &&
8651 IA->getConstraintString().compare(0, 4, "=l,l") == 0) {
8652 IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
8653 if (Ty && Ty->getBitWidth() == 32)
8654 return IntrinsicLowering::LowerToByteSwap(CI);
8662 /// getConstraintType - Given a constraint letter, return the type of
8663 /// constraint it is for this target.
8664 ARMTargetLowering::ConstraintType
8665 ARMTargetLowering::getConstraintType(const std::string &Constraint) const {
8666 if (Constraint.size() == 1) {
8667 switch (Constraint[0]) {
8669 case 'l': return C_RegisterClass;
8670 case 'w': return C_RegisterClass;
8671 case 'h': return C_RegisterClass;
8672 case 'x': return C_RegisterClass;
8673 case 't': return C_RegisterClass;
8674 case 'j': return C_Other; // Constant for movw.
8675 // An address with a single base register. Due to the way we
8676 // currently handle addresses it is the same as an 'r' memory constraint.
8677 case 'Q': return C_Memory;
8679 } else if (Constraint.size() == 2) {
8680 switch (Constraint[0]) {
8682 // All 'U+' constraints are addresses.
8683 case 'U': return C_Memory;
8686 return TargetLowering::getConstraintType(Constraint);
8689 /// Examine constraint type and operand type and determine a weight value.
8690 /// This object must already have been set up with the operand type
8691 /// and the current alternative constraint selected.
8692 TargetLowering::ConstraintWeight
8693 ARMTargetLowering::getSingleConstraintMatchWeight(
8694 AsmOperandInfo &info, const char *constraint) const {
8695 ConstraintWeight weight = CW_Invalid;
8696 Value *CallOperandVal = info.CallOperandVal;
8697 // If we don't have a value, we can't do a match,
8698 // but allow it at the lowest weight.
8699 if (CallOperandVal == NULL)
8701 Type *type = CallOperandVal->getType();
8702 // Look at the constraint type.
8703 switch (*constraint) {
8705 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
8708 if (type->isIntegerTy()) {
8709 if (Subtarget->isThumb())
8710 weight = CW_SpecificReg;
8712 weight = CW_Register;
8716 if (type->isFloatingPointTy())
8717 weight = CW_Register;
8723 typedef std::pair<unsigned, const TargetRegisterClass*> RCPair;
8725 ARMTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
8727 if (Constraint.size() == 1) {
8728 // GCC ARM Constraint Letters
8729 switch (Constraint[0]) {
8730 case 'l': // Low regs or general regs.
8731 if (Subtarget->isThumb())
8732 return RCPair(0U, ARM::tGPRRegisterClass);
8734 return RCPair(0U, ARM::GPRRegisterClass);
8735 case 'h': // High regs or no regs.
8736 if (Subtarget->isThumb())
8737 return RCPair(0U, ARM::hGPRRegisterClass);
8740 return RCPair(0U, ARM::GPRRegisterClass);
8743 return RCPair(0U, ARM::SPRRegisterClass);
8744 if (VT.getSizeInBits() == 64)
8745 return RCPair(0U, ARM::DPRRegisterClass);
8746 if (VT.getSizeInBits() == 128)
8747 return RCPair(0U, ARM::QPRRegisterClass);
8751 return RCPair(0U, ARM::SPR_8RegisterClass);
8752 if (VT.getSizeInBits() == 64)
8753 return RCPair(0U, ARM::DPR_8RegisterClass);
8754 if (VT.getSizeInBits() == 128)
8755 return RCPair(0U, ARM::QPR_8RegisterClass);
8759 return RCPair(0U, ARM::SPRRegisterClass);
8763 if (StringRef("{cc}").equals_lower(Constraint))
8764 return std::make_pair(unsigned(ARM::CPSR), ARM::CCRRegisterClass);
8766 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
8769 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
8770 /// vector. If it is invalid, don't add anything to Ops.
8771 void ARMTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
8772 std::string &Constraint,
8773 std::vector<SDValue>&Ops,
8774 SelectionDAG &DAG) const {
8775 SDValue Result(0, 0);
8777 // Currently only support length 1 constraints.
8778 if (Constraint.length() != 1) return;
8780 char ConstraintLetter = Constraint[0];
8781 switch (ConstraintLetter) {
8784 case 'I': case 'J': case 'K': case 'L':
8785 case 'M': case 'N': case 'O':
8786 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
8790 int64_t CVal64 = C->getSExtValue();
8791 int CVal = (int) CVal64;
8792 // None of these constraints allow values larger than 32 bits. Check
8793 // that the value fits in an int.
8797 switch (ConstraintLetter) {
8799 // Constant suitable for movw, must be between 0 and
8801 if (Subtarget->hasV6T2Ops())
8802 if (CVal >= 0 && CVal <= 65535)
8806 if (Subtarget->isThumb1Only()) {
8807 // This must be a constant between 0 and 255, for ADD
8809 if (CVal >= 0 && CVal <= 255)
8811 } else if (Subtarget->isThumb2()) {
8812 // A constant that can be used as an immediate value in a
8813 // data-processing instruction.
8814 if (ARM_AM::getT2SOImmVal(CVal) != -1)
8817 // A constant that can be used as an immediate value in a
8818 // data-processing instruction.
8819 if (ARM_AM::getSOImmVal(CVal) != -1)
8825 if (Subtarget->isThumb()) { // FIXME thumb2
8826 // This must be a constant between -255 and -1, for negated ADD
8827 // immediates. This can be used in GCC with an "n" modifier that
8828 // prints the negated value, for use with SUB instructions. It is
8829 // not useful otherwise but is implemented for compatibility.
8830 if (CVal >= -255 && CVal <= -1)
8833 // This must be a constant between -4095 and 4095. It is not clear
8834 // what this constraint is intended for. Implemented for
8835 // compatibility with GCC.
8836 if (CVal >= -4095 && CVal <= 4095)
8842 if (Subtarget->isThumb1Only()) {
8843 // A 32-bit value where only one byte has a nonzero value. Exclude
8844 // zero to match GCC. This constraint is used by GCC internally for
8845 // constants that can be loaded with a move/shift combination.
8846 // It is not useful otherwise but is implemented for compatibility.
8847 if (CVal != 0 && ARM_AM::isThumbImmShiftedVal(CVal))
8849 } else if (Subtarget->isThumb2()) {
8850 // A constant whose bitwise inverse can be used as an immediate
8851 // value in a data-processing instruction. This can be used in GCC
8852 // with a "B" modifier that prints the inverted value, for use with
8853 // BIC and MVN instructions. It is not useful otherwise but is
8854 // implemented for compatibility.
8855 if (ARM_AM::getT2SOImmVal(~CVal) != -1)
8858 // A constant whose bitwise inverse can be used as an immediate
8859 // value in a data-processing instruction. This can be used in GCC
8860 // with a "B" modifier that prints the inverted value, for use with
8861 // BIC and MVN instructions. It is not useful otherwise but is
8862 // implemented for compatibility.
8863 if (ARM_AM::getSOImmVal(~CVal) != -1)
8869 if (Subtarget->isThumb1Only()) {
8870 // This must be a constant between -7 and 7,
8871 // for 3-operand ADD/SUB immediate instructions.
8872 if (CVal >= -7 && CVal < 7)
8874 } else if (Subtarget->isThumb2()) {
8875 // A constant whose negation can be used as an immediate value in a
8876 // data-processing instruction. This can be used in GCC with an "n"
8877 // modifier that prints the negated value, for use with SUB
8878 // instructions. It is not useful otherwise but is implemented for
8880 if (ARM_AM::getT2SOImmVal(-CVal) != -1)
8883 // A constant whose negation can be used as an immediate value in a
8884 // data-processing instruction. This can be used in GCC with an "n"
8885 // modifier that prints the negated value, for use with SUB
8886 // instructions. It is not useful otherwise but is implemented for
8888 if (ARM_AM::getSOImmVal(-CVal) != -1)
8894 if (Subtarget->isThumb()) { // FIXME thumb2
8895 // This must be a multiple of 4 between 0 and 1020, for
8896 // ADD sp + immediate.
8897 if ((CVal >= 0 && CVal <= 1020) && ((CVal & 3) == 0))
8900 // A power of two or a constant between 0 and 32. This is used in
8901 // GCC for the shift amount on shifted register operands, but it is
8902 // useful in general for any shift amounts.
8903 if ((CVal >= 0 && CVal <= 32) || ((CVal & (CVal - 1)) == 0))
8909 if (Subtarget->isThumb()) { // FIXME thumb2
8910 // This must be a constant between 0 and 31, for shift amounts.
8911 if (CVal >= 0 && CVal <= 31)
8917 if (Subtarget->isThumb()) { // FIXME thumb2
8918 // This must be a multiple of 4 between -508 and 508, for
8919 // ADD/SUB sp = sp + immediate.
8920 if ((CVal >= -508 && CVal <= 508) && ((CVal & 3) == 0))
8925 Result = DAG.getTargetConstant(CVal, Op.getValueType());
8929 if (Result.getNode()) {
8930 Ops.push_back(Result);
8933 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
8937 ARMTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
8938 // The ARM target isn't yet aware of offsets.
8942 bool ARM::isBitFieldInvertedMask(unsigned v) {
8943 if (v == 0xffffffff)
8945 // there can be 1's on either or both "outsides", all the "inside"
8947 unsigned int lsb = 0, msb = 31;
8948 while (v & (1 << msb)) --msb;
8949 while (v & (1 << lsb)) ++lsb;
8950 for (unsigned int i = lsb; i <= msb; ++i) {
8957 /// isFPImmLegal - Returns true if the target can instruction select the
8958 /// specified FP immediate natively. If false, the legalizer will
8959 /// materialize the FP immediate as a load from a constant pool.
8960 bool ARMTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
8961 if (!Subtarget->hasVFP3())
8964 return ARM_AM::getFP32Imm(Imm) != -1;
8966 return ARM_AM::getFP64Imm(Imm) != -1;
8970 /// getTgtMemIntrinsic - Represent NEON load and store intrinsics as
8971 /// MemIntrinsicNodes. The associated MachineMemOperands record the alignment
8972 /// specified in the intrinsic calls.
8973 bool ARMTargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info,
8975 unsigned Intrinsic) const {
8976 switch (Intrinsic) {
8977 case Intrinsic::arm_neon_vld1:
8978 case Intrinsic::arm_neon_vld2:
8979 case Intrinsic::arm_neon_vld3:
8980 case Intrinsic::arm_neon_vld4:
8981 case Intrinsic::arm_neon_vld2lane:
8982 case Intrinsic::arm_neon_vld3lane:
8983 case Intrinsic::arm_neon_vld4lane: {
8984 Info.opc = ISD::INTRINSIC_W_CHAIN;
8985 // Conservatively set memVT to the entire set of vectors loaded.
8986 uint64_t NumElts = getTargetData()->getTypeAllocSize(I.getType()) / 8;
8987 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
8988 Info.ptrVal = I.getArgOperand(0);
8990 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
8991 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
8992 Info.vol = false; // volatile loads with NEON intrinsics not supported
8993 Info.readMem = true;
8994 Info.writeMem = false;
8997 case Intrinsic::arm_neon_vst1:
8998 case Intrinsic::arm_neon_vst2:
8999 case Intrinsic::arm_neon_vst3:
9000 case Intrinsic::arm_neon_vst4:
9001 case Intrinsic::arm_neon_vst2lane:
9002 case Intrinsic::arm_neon_vst3lane:
9003 case Intrinsic::arm_neon_vst4lane: {
9004 Info.opc = ISD::INTRINSIC_VOID;
9005 // Conservatively set memVT to the entire set of vectors stored.
9006 unsigned NumElts = 0;
9007 for (unsigned ArgI = 1, ArgE = I.getNumArgOperands(); ArgI < ArgE; ++ArgI) {
9008 Type *ArgTy = I.getArgOperand(ArgI)->getType();
9009 if (!ArgTy->isVectorTy())
9011 NumElts += getTargetData()->getTypeAllocSize(ArgTy) / 8;
9013 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
9014 Info.ptrVal = I.getArgOperand(0);
9016 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
9017 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
9018 Info.vol = false; // volatile stores with NEON intrinsics not supported
9019 Info.readMem = false;
9020 Info.writeMem = true;
9023 case Intrinsic::arm_strexd: {
9024 Info.opc = ISD::INTRINSIC_W_CHAIN;
9025 Info.memVT = MVT::i64;
9026 Info.ptrVal = I.getArgOperand(2);
9030 Info.readMem = false;
9031 Info.writeMem = true;
9034 case Intrinsic::arm_ldrexd: {
9035 Info.opc = ISD::INTRINSIC_W_CHAIN;
9036 Info.memVT = MVT::i64;
9037 Info.ptrVal = I.getArgOperand(0);
9041 Info.readMem = true;
9042 Info.writeMem = false;