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/MachineRegisterInfo.h"
42 #include "llvm/CodeGen/PseudoSourceValue.h"
43 #include "llvm/CodeGen/SelectionDAG.h"
44 #include "llvm/MC/MCSectionMachO.h"
45 #include "llvm/Target/TargetOptions.h"
46 #include "llvm/ADT/VectorExtras.h"
47 #include "llvm/ADT/StringExtras.h"
48 #include "llvm/ADT/Statistic.h"
49 #include "llvm/Support/CommandLine.h"
50 #include "llvm/Support/ErrorHandling.h"
51 #include "llvm/Support/MathExtras.h"
52 #include "llvm/Support/raw_ostream.h"
56 STATISTIC(NumTailCalls, "Number of tail calls");
57 STATISTIC(NumMovwMovt, "Number of GAs materialized with movw + movt");
59 // This option should go away when tail calls fully work.
61 EnableARMTailCalls("arm-tail-calls", cl::Hidden,
62 cl::desc("Generate tail calls (TEMPORARY OPTION)."),
66 EnableARMLongCalls("arm-long-calls", cl::Hidden,
67 cl::desc("Generate calls via indirect call instructions"),
71 ARMInterworking("arm-interworking", cl::Hidden,
72 cl::desc("Enable / disable ARM interworking (for debugging only)"),
76 class ARMCCState : public CCState {
78 ARMCCState(CallingConv::ID CC, bool isVarArg, MachineFunction &MF,
79 const TargetMachine &TM, SmallVector<CCValAssign, 16> &locs,
80 LLVMContext &C, ParmContext PC)
81 : CCState(CC, isVarArg, MF, TM, locs, C) {
82 assert(((PC == Call) || (PC == Prologue)) &&
83 "ARMCCState users must specify whether their context is call"
84 "or prologue generation.");
90 // The APCS parameter registers.
91 static const unsigned GPRArgRegs[] = {
92 ARM::R0, ARM::R1, ARM::R2, ARM::R3
95 void ARMTargetLowering::addTypeForNEON(EVT VT, EVT PromotedLdStVT,
96 EVT PromotedBitwiseVT) {
97 if (VT != PromotedLdStVT) {
98 setOperationAction(ISD::LOAD, VT.getSimpleVT(), Promote);
99 AddPromotedToType (ISD::LOAD, VT.getSimpleVT(),
100 PromotedLdStVT.getSimpleVT());
102 setOperationAction(ISD::STORE, VT.getSimpleVT(), Promote);
103 AddPromotedToType (ISD::STORE, VT.getSimpleVT(),
104 PromotedLdStVT.getSimpleVT());
107 EVT ElemTy = VT.getVectorElementType();
108 if (ElemTy != MVT::i64 && ElemTy != MVT::f64)
109 setOperationAction(ISD::SETCC, 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(), Expand);
113 setOperationAction(ISD::UINT_TO_FP, VT.getSimpleVT(), Expand);
114 setOperationAction(ISD::FP_TO_SINT, VT.getSimpleVT(), Expand);
115 setOperationAction(ISD::FP_TO_UINT, VT.getSimpleVT(), Expand);
117 setOperationAction(ISD::BUILD_VECTOR, VT.getSimpleVT(), Custom);
118 setOperationAction(ISD::VECTOR_SHUFFLE, VT.getSimpleVT(), Custom);
119 setOperationAction(ISD::CONCAT_VECTORS, VT.getSimpleVT(), Legal);
120 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT.getSimpleVT(), Legal);
121 setOperationAction(ISD::SELECT, VT.getSimpleVT(), Expand);
122 setOperationAction(ISD::SELECT_CC, VT.getSimpleVT(), Expand);
123 if (VT.isInteger()) {
124 setOperationAction(ISD::SHL, VT.getSimpleVT(), Custom);
125 setOperationAction(ISD::SRA, VT.getSimpleVT(), Custom);
126 setOperationAction(ISD::SRL, VT.getSimpleVT(), Custom);
127 setLoadExtAction(ISD::SEXTLOAD, VT.getSimpleVT(), Expand);
128 setLoadExtAction(ISD::ZEXTLOAD, VT.getSimpleVT(), Expand);
129 for (unsigned InnerVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
130 InnerVT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
131 setTruncStoreAction(VT.getSimpleVT(),
132 (MVT::SimpleValueType)InnerVT, Expand);
134 setLoadExtAction(ISD::EXTLOAD, VT.getSimpleVT(), Expand);
136 // Promote all bit-wise operations.
137 if (VT.isInteger() && VT != PromotedBitwiseVT) {
138 setOperationAction(ISD::AND, VT.getSimpleVT(), Promote);
139 AddPromotedToType (ISD::AND, VT.getSimpleVT(),
140 PromotedBitwiseVT.getSimpleVT());
141 setOperationAction(ISD::OR, VT.getSimpleVT(), Promote);
142 AddPromotedToType (ISD::OR, VT.getSimpleVT(),
143 PromotedBitwiseVT.getSimpleVT());
144 setOperationAction(ISD::XOR, VT.getSimpleVT(), Promote);
145 AddPromotedToType (ISD::XOR, VT.getSimpleVT(),
146 PromotedBitwiseVT.getSimpleVT());
149 // Neon does not support vector divide/remainder operations.
150 setOperationAction(ISD::SDIV, VT.getSimpleVT(), Expand);
151 setOperationAction(ISD::UDIV, VT.getSimpleVT(), Expand);
152 setOperationAction(ISD::FDIV, VT.getSimpleVT(), Expand);
153 setOperationAction(ISD::SREM, VT.getSimpleVT(), Expand);
154 setOperationAction(ISD::UREM, VT.getSimpleVT(), Expand);
155 setOperationAction(ISD::FREM, VT.getSimpleVT(), Expand);
158 void ARMTargetLowering::addDRTypeForNEON(EVT VT) {
159 addRegisterClass(VT, ARM::DPRRegisterClass);
160 addTypeForNEON(VT, MVT::f64, MVT::v2i32);
163 void ARMTargetLowering::addQRTypeForNEON(EVT VT) {
164 addRegisterClass(VT, ARM::QPRRegisterClass);
165 addTypeForNEON(VT, MVT::v2f64, MVT::v4i32);
168 static TargetLoweringObjectFile *createTLOF(TargetMachine &TM) {
169 if (TM.getSubtarget<ARMSubtarget>().isTargetDarwin())
170 return new TargetLoweringObjectFileMachO();
172 return new ARMElfTargetObjectFile();
175 ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
176 : TargetLowering(TM, createTLOF(TM)) {
177 Subtarget = &TM.getSubtarget<ARMSubtarget>();
178 RegInfo = TM.getRegisterInfo();
179 Itins = TM.getInstrItineraryData();
181 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
183 if (Subtarget->isTargetDarwin()) {
184 // Uses VFP for Thumb libfuncs if available.
185 if (Subtarget->isThumb() && Subtarget->hasVFP2()) {
186 // Single-precision floating-point arithmetic.
187 setLibcallName(RTLIB::ADD_F32, "__addsf3vfp");
188 setLibcallName(RTLIB::SUB_F32, "__subsf3vfp");
189 setLibcallName(RTLIB::MUL_F32, "__mulsf3vfp");
190 setLibcallName(RTLIB::DIV_F32, "__divsf3vfp");
192 // Double-precision floating-point arithmetic.
193 setLibcallName(RTLIB::ADD_F64, "__adddf3vfp");
194 setLibcallName(RTLIB::SUB_F64, "__subdf3vfp");
195 setLibcallName(RTLIB::MUL_F64, "__muldf3vfp");
196 setLibcallName(RTLIB::DIV_F64, "__divdf3vfp");
198 // Single-precision comparisons.
199 setLibcallName(RTLIB::OEQ_F32, "__eqsf2vfp");
200 setLibcallName(RTLIB::UNE_F32, "__nesf2vfp");
201 setLibcallName(RTLIB::OLT_F32, "__ltsf2vfp");
202 setLibcallName(RTLIB::OLE_F32, "__lesf2vfp");
203 setLibcallName(RTLIB::OGE_F32, "__gesf2vfp");
204 setLibcallName(RTLIB::OGT_F32, "__gtsf2vfp");
205 setLibcallName(RTLIB::UO_F32, "__unordsf2vfp");
206 setLibcallName(RTLIB::O_F32, "__unordsf2vfp");
208 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
209 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETNE);
210 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
211 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
212 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
213 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
214 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
215 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
217 // Double-precision comparisons.
218 setLibcallName(RTLIB::OEQ_F64, "__eqdf2vfp");
219 setLibcallName(RTLIB::UNE_F64, "__nedf2vfp");
220 setLibcallName(RTLIB::OLT_F64, "__ltdf2vfp");
221 setLibcallName(RTLIB::OLE_F64, "__ledf2vfp");
222 setLibcallName(RTLIB::OGE_F64, "__gedf2vfp");
223 setLibcallName(RTLIB::OGT_F64, "__gtdf2vfp");
224 setLibcallName(RTLIB::UO_F64, "__unorddf2vfp");
225 setLibcallName(RTLIB::O_F64, "__unorddf2vfp");
227 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
228 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETNE);
229 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
230 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
231 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
232 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
233 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
234 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
236 // Floating-point to integer conversions.
237 // i64 conversions are done via library routines even when generating VFP
238 // instructions, so use the same ones.
239 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__fixdfsivfp");
240 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__fixunsdfsivfp");
241 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__fixsfsivfp");
242 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__fixunssfsivfp");
244 // Conversions between floating types.
245 setLibcallName(RTLIB::FPROUND_F64_F32, "__truncdfsf2vfp");
246 setLibcallName(RTLIB::FPEXT_F32_F64, "__extendsfdf2vfp");
248 // Integer to floating-point conversions.
249 // i64 conversions are done via library routines even when generating VFP
250 // instructions, so use the same ones.
251 // FIXME: There appears to be some naming inconsistency in ARM libgcc:
252 // e.g., __floatunsidf vs. __floatunssidfvfp.
253 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__floatsidfvfp");
254 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__floatunssidfvfp");
255 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__floatsisfvfp");
256 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__floatunssisfvfp");
260 // These libcalls are not available in 32-bit.
261 setLibcallName(RTLIB::SHL_I128, 0);
262 setLibcallName(RTLIB::SRL_I128, 0);
263 setLibcallName(RTLIB::SRA_I128, 0);
265 if (Subtarget->isAAPCS_ABI()) {
266 // Double-precision floating-point arithmetic helper functions
267 // RTABI chapter 4.1.2, Table 2
268 setLibcallName(RTLIB::ADD_F64, "__aeabi_dadd");
269 setLibcallName(RTLIB::DIV_F64, "__aeabi_ddiv");
270 setLibcallName(RTLIB::MUL_F64, "__aeabi_dmul");
271 setLibcallName(RTLIB::SUB_F64, "__aeabi_dsub");
272 setLibcallCallingConv(RTLIB::ADD_F64, CallingConv::ARM_AAPCS);
273 setLibcallCallingConv(RTLIB::DIV_F64, CallingConv::ARM_AAPCS);
274 setLibcallCallingConv(RTLIB::MUL_F64, CallingConv::ARM_AAPCS);
275 setLibcallCallingConv(RTLIB::SUB_F64, CallingConv::ARM_AAPCS);
277 // Double-precision floating-point comparison helper functions
278 // RTABI chapter 4.1.2, Table 3
279 setLibcallName(RTLIB::OEQ_F64, "__aeabi_dcmpeq");
280 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
281 setLibcallName(RTLIB::UNE_F64, "__aeabi_dcmpeq");
282 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETEQ);
283 setLibcallName(RTLIB::OLT_F64, "__aeabi_dcmplt");
284 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
285 setLibcallName(RTLIB::OLE_F64, "__aeabi_dcmple");
286 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
287 setLibcallName(RTLIB::OGE_F64, "__aeabi_dcmpge");
288 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
289 setLibcallName(RTLIB::OGT_F64, "__aeabi_dcmpgt");
290 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
291 setLibcallName(RTLIB::UO_F64, "__aeabi_dcmpun");
292 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
293 setLibcallName(RTLIB::O_F64, "__aeabi_dcmpun");
294 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
295 setLibcallCallingConv(RTLIB::OEQ_F64, CallingConv::ARM_AAPCS);
296 setLibcallCallingConv(RTLIB::UNE_F64, CallingConv::ARM_AAPCS);
297 setLibcallCallingConv(RTLIB::OLT_F64, CallingConv::ARM_AAPCS);
298 setLibcallCallingConv(RTLIB::OLE_F64, CallingConv::ARM_AAPCS);
299 setLibcallCallingConv(RTLIB::OGE_F64, CallingConv::ARM_AAPCS);
300 setLibcallCallingConv(RTLIB::OGT_F64, CallingConv::ARM_AAPCS);
301 setLibcallCallingConv(RTLIB::UO_F64, CallingConv::ARM_AAPCS);
302 setLibcallCallingConv(RTLIB::O_F64, CallingConv::ARM_AAPCS);
304 // Single-precision floating-point arithmetic helper functions
305 // RTABI chapter 4.1.2, Table 4
306 setLibcallName(RTLIB::ADD_F32, "__aeabi_fadd");
307 setLibcallName(RTLIB::DIV_F32, "__aeabi_fdiv");
308 setLibcallName(RTLIB::MUL_F32, "__aeabi_fmul");
309 setLibcallName(RTLIB::SUB_F32, "__aeabi_fsub");
310 setLibcallCallingConv(RTLIB::ADD_F32, CallingConv::ARM_AAPCS);
311 setLibcallCallingConv(RTLIB::DIV_F32, CallingConv::ARM_AAPCS);
312 setLibcallCallingConv(RTLIB::MUL_F32, CallingConv::ARM_AAPCS);
313 setLibcallCallingConv(RTLIB::SUB_F32, CallingConv::ARM_AAPCS);
315 // Single-precision floating-point comparison helper functions
316 // RTABI chapter 4.1.2, Table 5
317 setLibcallName(RTLIB::OEQ_F32, "__aeabi_fcmpeq");
318 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
319 setLibcallName(RTLIB::UNE_F32, "__aeabi_fcmpeq");
320 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETEQ);
321 setLibcallName(RTLIB::OLT_F32, "__aeabi_fcmplt");
322 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
323 setLibcallName(RTLIB::OLE_F32, "__aeabi_fcmple");
324 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
325 setLibcallName(RTLIB::OGE_F32, "__aeabi_fcmpge");
326 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
327 setLibcallName(RTLIB::OGT_F32, "__aeabi_fcmpgt");
328 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
329 setLibcallName(RTLIB::UO_F32, "__aeabi_fcmpun");
330 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
331 setLibcallName(RTLIB::O_F32, "__aeabi_fcmpun");
332 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
333 setLibcallCallingConv(RTLIB::OEQ_F32, CallingConv::ARM_AAPCS);
334 setLibcallCallingConv(RTLIB::UNE_F32, CallingConv::ARM_AAPCS);
335 setLibcallCallingConv(RTLIB::OLT_F32, CallingConv::ARM_AAPCS);
336 setLibcallCallingConv(RTLIB::OLE_F32, CallingConv::ARM_AAPCS);
337 setLibcallCallingConv(RTLIB::OGE_F32, CallingConv::ARM_AAPCS);
338 setLibcallCallingConv(RTLIB::OGT_F32, CallingConv::ARM_AAPCS);
339 setLibcallCallingConv(RTLIB::UO_F32, CallingConv::ARM_AAPCS);
340 setLibcallCallingConv(RTLIB::O_F32, CallingConv::ARM_AAPCS);
342 // Floating-point to integer conversions.
343 // RTABI chapter 4.1.2, Table 6
344 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__aeabi_d2iz");
345 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__aeabi_d2uiz");
346 setLibcallName(RTLIB::FPTOSINT_F64_I64, "__aeabi_d2lz");
347 setLibcallName(RTLIB::FPTOUINT_F64_I64, "__aeabi_d2ulz");
348 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__aeabi_f2iz");
349 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__aeabi_f2uiz");
350 setLibcallName(RTLIB::FPTOSINT_F32_I64, "__aeabi_f2lz");
351 setLibcallName(RTLIB::FPTOUINT_F32_I64, "__aeabi_f2ulz");
352 setLibcallCallingConv(RTLIB::FPTOSINT_F64_I32, CallingConv::ARM_AAPCS);
353 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I32, CallingConv::ARM_AAPCS);
354 setLibcallCallingConv(RTLIB::FPTOSINT_F64_I64, CallingConv::ARM_AAPCS);
355 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I64, CallingConv::ARM_AAPCS);
356 setLibcallCallingConv(RTLIB::FPTOSINT_F32_I32, CallingConv::ARM_AAPCS);
357 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I32, CallingConv::ARM_AAPCS);
358 setLibcallCallingConv(RTLIB::FPTOSINT_F32_I64, CallingConv::ARM_AAPCS);
359 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I64, CallingConv::ARM_AAPCS);
361 // Conversions between floating types.
362 // RTABI chapter 4.1.2, Table 7
363 setLibcallName(RTLIB::FPROUND_F64_F32, "__aeabi_d2f");
364 setLibcallName(RTLIB::FPEXT_F32_F64, "__aeabi_f2d");
365 setLibcallCallingConv(RTLIB::FPROUND_F64_F32, CallingConv::ARM_AAPCS);
366 setLibcallCallingConv(RTLIB::FPEXT_F32_F64, CallingConv::ARM_AAPCS);
368 // Integer to floating-point conversions.
369 // RTABI chapter 4.1.2, Table 8
370 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__aeabi_i2d");
371 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__aeabi_ui2d");
372 setLibcallName(RTLIB::SINTTOFP_I64_F64, "__aeabi_l2d");
373 setLibcallName(RTLIB::UINTTOFP_I64_F64, "__aeabi_ul2d");
374 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__aeabi_i2f");
375 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__aeabi_ui2f");
376 setLibcallName(RTLIB::SINTTOFP_I64_F32, "__aeabi_l2f");
377 setLibcallName(RTLIB::UINTTOFP_I64_F32, "__aeabi_ul2f");
378 setLibcallCallingConv(RTLIB::SINTTOFP_I32_F64, CallingConv::ARM_AAPCS);
379 setLibcallCallingConv(RTLIB::UINTTOFP_I32_F64, CallingConv::ARM_AAPCS);
380 setLibcallCallingConv(RTLIB::SINTTOFP_I64_F64, CallingConv::ARM_AAPCS);
381 setLibcallCallingConv(RTLIB::UINTTOFP_I64_F64, CallingConv::ARM_AAPCS);
382 setLibcallCallingConv(RTLIB::SINTTOFP_I32_F32, CallingConv::ARM_AAPCS);
383 setLibcallCallingConv(RTLIB::UINTTOFP_I32_F32, CallingConv::ARM_AAPCS);
384 setLibcallCallingConv(RTLIB::SINTTOFP_I64_F32, CallingConv::ARM_AAPCS);
385 setLibcallCallingConv(RTLIB::UINTTOFP_I64_F32, CallingConv::ARM_AAPCS);
387 // Long long helper functions
388 // RTABI chapter 4.2, Table 9
389 setLibcallName(RTLIB::MUL_I64, "__aeabi_lmul");
390 setLibcallName(RTLIB::SDIV_I64, "__aeabi_ldivmod");
391 setLibcallName(RTLIB::UDIV_I64, "__aeabi_uldivmod");
392 setLibcallName(RTLIB::SHL_I64, "__aeabi_llsl");
393 setLibcallName(RTLIB::SRL_I64, "__aeabi_llsr");
394 setLibcallName(RTLIB::SRA_I64, "__aeabi_lasr");
395 setLibcallCallingConv(RTLIB::MUL_I64, CallingConv::ARM_AAPCS);
396 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::ARM_AAPCS);
397 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::ARM_AAPCS);
398 setLibcallCallingConv(RTLIB::SHL_I64, CallingConv::ARM_AAPCS);
399 setLibcallCallingConv(RTLIB::SRL_I64, CallingConv::ARM_AAPCS);
400 setLibcallCallingConv(RTLIB::SRA_I64, CallingConv::ARM_AAPCS);
402 // Integer division functions
403 // RTABI chapter 4.3.1
404 setLibcallName(RTLIB::SDIV_I8, "__aeabi_idiv");
405 setLibcallName(RTLIB::SDIV_I16, "__aeabi_idiv");
406 setLibcallName(RTLIB::SDIV_I32, "__aeabi_idiv");
407 setLibcallName(RTLIB::UDIV_I8, "__aeabi_uidiv");
408 setLibcallName(RTLIB::UDIV_I16, "__aeabi_uidiv");
409 setLibcallName(RTLIB::UDIV_I32, "__aeabi_uidiv");
410 setLibcallCallingConv(RTLIB::SDIV_I8, CallingConv::ARM_AAPCS);
411 setLibcallCallingConv(RTLIB::SDIV_I16, CallingConv::ARM_AAPCS);
412 setLibcallCallingConv(RTLIB::SDIV_I32, 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);
418 // RTABI chapter 4.3.4
419 setLibcallName(RTLIB::MEMCPY, "__aeabi_memcpy");
420 setLibcallName(RTLIB::MEMMOVE, "__aeabi_memmove");
421 setLibcallName(RTLIB::MEMSET, "__aeabi_memset");
424 if (Subtarget->isThumb1Only())
425 addRegisterClass(MVT::i32, ARM::tGPRRegisterClass);
427 addRegisterClass(MVT::i32, ARM::GPRRegisterClass);
428 if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only()) {
429 addRegisterClass(MVT::f32, ARM::SPRRegisterClass);
430 if (!Subtarget->isFPOnlySP())
431 addRegisterClass(MVT::f64, ARM::DPRRegisterClass);
433 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
436 if (Subtarget->hasNEON()) {
437 addDRTypeForNEON(MVT::v2f32);
438 addDRTypeForNEON(MVT::v8i8);
439 addDRTypeForNEON(MVT::v4i16);
440 addDRTypeForNEON(MVT::v2i32);
441 addDRTypeForNEON(MVT::v1i64);
443 addQRTypeForNEON(MVT::v4f32);
444 addQRTypeForNEON(MVT::v2f64);
445 addQRTypeForNEON(MVT::v16i8);
446 addQRTypeForNEON(MVT::v8i16);
447 addQRTypeForNEON(MVT::v4i32);
448 addQRTypeForNEON(MVT::v2i64);
450 // v2f64 is legal so that QR subregs can be extracted as f64 elements, but
451 // neither Neon nor VFP support any arithmetic operations on it.
452 setOperationAction(ISD::FADD, MVT::v2f64, Expand);
453 setOperationAction(ISD::FSUB, MVT::v2f64, Expand);
454 setOperationAction(ISD::FMUL, MVT::v2f64, Expand);
455 setOperationAction(ISD::FDIV, MVT::v2f64, Expand);
456 setOperationAction(ISD::FREM, MVT::v2f64, Expand);
457 setOperationAction(ISD::FCOPYSIGN, MVT::v2f64, Expand);
458 setOperationAction(ISD::SETCC, MVT::v2f64, Expand);
459 setOperationAction(ISD::FNEG, MVT::v2f64, Expand);
460 setOperationAction(ISD::FABS, MVT::v2f64, Expand);
461 setOperationAction(ISD::FSQRT, MVT::v2f64, Expand);
462 setOperationAction(ISD::FSIN, MVT::v2f64, Expand);
463 setOperationAction(ISD::FCOS, MVT::v2f64, Expand);
464 setOperationAction(ISD::FPOWI, MVT::v2f64, Expand);
465 setOperationAction(ISD::FPOW, MVT::v2f64, Expand);
466 setOperationAction(ISD::FLOG, MVT::v2f64, Expand);
467 setOperationAction(ISD::FLOG2, MVT::v2f64, Expand);
468 setOperationAction(ISD::FLOG10, MVT::v2f64, Expand);
469 setOperationAction(ISD::FEXP, MVT::v2f64, Expand);
470 setOperationAction(ISD::FEXP2, MVT::v2f64, Expand);
471 setOperationAction(ISD::FCEIL, MVT::v2f64, Expand);
472 setOperationAction(ISD::FTRUNC, MVT::v2f64, Expand);
473 setOperationAction(ISD::FRINT, MVT::v2f64, Expand);
474 setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Expand);
475 setOperationAction(ISD::FFLOOR, MVT::v2f64, Expand);
477 setTruncStoreAction(MVT::v2f64, MVT::v2f32, Expand);
479 // Neon does not support some operations on v1i64 and v2i64 types.
480 setOperationAction(ISD::MUL, MVT::v1i64, Expand);
481 // Custom handling for some quad-vector types to detect VMULL.
482 setOperationAction(ISD::MUL, MVT::v8i16, Custom);
483 setOperationAction(ISD::MUL, MVT::v4i32, Custom);
484 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
485 // Custom handling for some vector types to avoid expensive expansions
486 setOperationAction(ISD::SDIV, MVT::v4i16, Custom);
487 setOperationAction(ISD::SDIV, MVT::v8i8, Custom);
488 setOperationAction(ISD::UDIV, MVT::v4i16, Custom);
489 setOperationAction(ISD::UDIV, MVT::v8i8, Custom);
490 setOperationAction(ISD::SETCC, MVT::v1i64, Expand);
491 setOperationAction(ISD::SETCC, MVT::v2i64, Expand);
492 // Neon does not have single instruction SINT_TO_FP and UINT_TO_FP with
493 // a destination type that is wider than the source.
494 setOperationAction(ISD::SINT_TO_FP, MVT::v4i16, Custom);
495 setOperationAction(ISD::UINT_TO_FP, MVT::v4i16, Custom);
497 setTargetDAGCombine(ISD::INTRINSIC_VOID);
498 setTargetDAGCombine(ISD::INTRINSIC_W_CHAIN);
499 setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);
500 setTargetDAGCombine(ISD::SHL);
501 setTargetDAGCombine(ISD::SRL);
502 setTargetDAGCombine(ISD::SRA);
503 setTargetDAGCombine(ISD::SIGN_EXTEND);
504 setTargetDAGCombine(ISD::ZERO_EXTEND);
505 setTargetDAGCombine(ISD::ANY_EXTEND);
506 setTargetDAGCombine(ISD::SELECT_CC);
507 setTargetDAGCombine(ISD::BUILD_VECTOR);
508 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
509 setTargetDAGCombine(ISD::INSERT_VECTOR_ELT);
510 setTargetDAGCombine(ISD::STORE);
511 setTargetDAGCombine(ISD::FP_TO_SINT);
512 setTargetDAGCombine(ISD::FP_TO_UINT);
513 setTargetDAGCombine(ISD::FDIV);
516 computeRegisterProperties();
518 // ARM does not have f32 extending load.
519 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
521 // ARM does not have i1 sign extending load.
522 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
524 // ARM supports all 4 flavors of integer indexed load / store.
525 if (!Subtarget->isThumb1Only()) {
526 for (unsigned im = (unsigned)ISD::PRE_INC;
527 im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) {
528 setIndexedLoadAction(im, MVT::i1, Legal);
529 setIndexedLoadAction(im, MVT::i8, Legal);
530 setIndexedLoadAction(im, MVT::i16, Legal);
531 setIndexedLoadAction(im, MVT::i32, Legal);
532 setIndexedStoreAction(im, MVT::i1, Legal);
533 setIndexedStoreAction(im, MVT::i8, Legal);
534 setIndexedStoreAction(im, MVT::i16, Legal);
535 setIndexedStoreAction(im, MVT::i32, Legal);
539 // i64 operation support.
540 setOperationAction(ISD::MUL, MVT::i64, Expand);
541 setOperationAction(ISD::MULHU, MVT::i32, Expand);
542 if (Subtarget->isThumb1Only()) {
543 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
544 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
546 if (Subtarget->isThumb1Only() || !Subtarget->hasV6Ops()
547 || (Subtarget->isThumb2() && !Subtarget->hasThumb2DSP()))
548 setOperationAction(ISD::MULHS, MVT::i32, Expand);
550 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
551 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
552 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
553 setOperationAction(ISD::SRL, MVT::i64, Custom);
554 setOperationAction(ISD::SRA, MVT::i64, Custom);
556 if (!Subtarget->isThumb1Only()) {
557 // FIXME: We should do this for Thumb1 as well.
558 setOperationAction(ISD::ADDC, MVT::i32, Custom);
559 setOperationAction(ISD::ADDE, MVT::i32, Custom);
560 setOperationAction(ISD::SUBC, MVT::i32, Custom);
561 setOperationAction(ISD::SUBE, MVT::i32, Custom);
564 // ARM does not have ROTL.
565 setOperationAction(ISD::ROTL, MVT::i32, Expand);
566 setOperationAction(ISD::CTTZ, MVT::i32, Custom);
567 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
568 if (!Subtarget->hasV5TOps() || Subtarget->isThumb1Only())
569 setOperationAction(ISD::CTLZ, MVT::i32, Expand);
571 // Only ARMv6 has BSWAP.
572 if (!Subtarget->hasV6Ops())
573 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
575 // These are expanded into libcalls.
576 if (!Subtarget->hasDivide() || !Subtarget->isThumb2()) {
577 // v7M has a hardware divider
578 setOperationAction(ISD::SDIV, MVT::i32, Expand);
579 setOperationAction(ISD::UDIV, MVT::i32, Expand);
581 setOperationAction(ISD::SREM, MVT::i32, Expand);
582 setOperationAction(ISD::UREM, MVT::i32, Expand);
583 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
584 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
586 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
587 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
588 setOperationAction(ISD::GLOBAL_OFFSET_TABLE, MVT::i32, Custom);
589 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
590 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
592 setOperationAction(ISD::TRAP, MVT::Other, Legal);
594 // Use the default implementation.
595 setOperationAction(ISD::VASTART, MVT::Other, Custom);
596 setOperationAction(ISD::VAARG, MVT::Other, Expand);
597 setOperationAction(ISD::VACOPY, MVT::Other, Expand);
598 setOperationAction(ISD::VAEND, MVT::Other, Expand);
599 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
600 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
601 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
602 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
603 setExceptionPointerRegister(ARM::R0);
604 setExceptionSelectorRegister(ARM::R1);
606 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
607 // ARMv6 Thumb1 (except for CPUs that support dmb / dsb) and earlier use
608 // the default expansion.
609 // FIXME: This should be checking for v6k, not just v6.
610 if (Subtarget->hasDataBarrier() ||
611 (Subtarget->hasV6Ops() && !Subtarget->isThumb())) {
612 // membarrier needs custom lowering; the rest are legal and handled
614 setOperationAction(ISD::MEMBARRIER, MVT::Other, Custom);
615 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
616 // Custom lowering for 64-bit ops
617 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i64, Custom);
618 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
619 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i64, Custom);
620 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i64, Custom);
621 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Custom);
622 setOperationAction(ISD::ATOMIC_SWAP, MVT::i64, Custom);
623 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i64, Custom);
624 // Automatically insert fences (dmb ist) around ATOMIC_SWAP etc.
625 setInsertFencesForAtomic(true);
627 // Set them all for expansion, which will force libcalls.
628 setOperationAction(ISD::MEMBARRIER, MVT::Other, Expand);
629 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Expand);
630 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Expand);
631 setOperationAction(ISD::ATOMIC_SWAP, MVT::i32, Expand);
632 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i32, Expand);
633 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i32, Expand);
634 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i32, Expand);
635 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i32, Expand);
636 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i32, Expand);
637 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i32, Expand);
638 setOperationAction(ISD::ATOMIC_LOAD_MIN, MVT::i32, Expand);
639 setOperationAction(ISD::ATOMIC_LOAD_MAX, MVT::i32, Expand);
640 setOperationAction(ISD::ATOMIC_LOAD_UMIN, MVT::i32, Expand);
641 setOperationAction(ISD::ATOMIC_LOAD_UMAX, MVT::i32, Expand);
642 // Mark ATOMIC_LOAD and ATOMIC_STORE custom so we can handle the
643 // Unordered/Monotonic case.
644 setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Custom);
645 setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Custom);
646 // Since the libcalls include locking, fold in the fences
647 setShouldFoldAtomicFences(true);
650 setOperationAction(ISD::PREFETCH, MVT::Other, Custom);
652 // Requires SXTB/SXTH, available on v6 and up in both ARM and Thumb modes.
653 if (!Subtarget->hasV6Ops()) {
654 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
655 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand);
657 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
659 if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only()) {
660 // Turn f64->i64 into VMOVRRD, i64 -> f64 to VMOVDRR
661 // iff target supports vfp2.
662 setOperationAction(ISD::BITCAST, MVT::i64, Custom);
663 setOperationAction(ISD::FLT_ROUNDS_, MVT::i32, Custom);
666 // We want to custom lower some of our intrinsics.
667 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
668 if (Subtarget->isTargetDarwin()) {
669 setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
670 setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
671 setOperationAction(ISD::EH_SJLJ_DISPATCHSETUP, MVT::Other, Custom);
672 setLibcallName(RTLIB::UNWIND_RESUME, "_Unwind_SjLj_Resume");
675 setOperationAction(ISD::SETCC, MVT::i32, Expand);
676 setOperationAction(ISD::SETCC, MVT::f32, Expand);
677 setOperationAction(ISD::SETCC, MVT::f64, Expand);
678 setOperationAction(ISD::SELECT, MVT::i32, Custom);
679 setOperationAction(ISD::SELECT, MVT::f32, Custom);
680 setOperationAction(ISD::SELECT, MVT::f64, Custom);
681 setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
682 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
683 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
685 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
686 setOperationAction(ISD::BR_CC, MVT::i32, Custom);
687 setOperationAction(ISD::BR_CC, MVT::f32, Custom);
688 setOperationAction(ISD::BR_CC, MVT::f64, Custom);
689 setOperationAction(ISD::BR_JT, MVT::Other, Custom);
691 // We don't support sin/cos/fmod/copysign/pow
692 setOperationAction(ISD::FSIN, MVT::f64, Expand);
693 setOperationAction(ISD::FSIN, MVT::f32, Expand);
694 setOperationAction(ISD::FCOS, MVT::f32, Expand);
695 setOperationAction(ISD::FCOS, MVT::f64, Expand);
696 setOperationAction(ISD::FREM, MVT::f64, Expand);
697 setOperationAction(ISD::FREM, MVT::f32, Expand);
698 if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only()) {
699 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
700 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
702 setOperationAction(ISD::FPOW, MVT::f64, Expand);
703 setOperationAction(ISD::FPOW, MVT::f32, Expand);
705 setOperationAction(ISD::FMA, MVT::f64, Expand);
706 setOperationAction(ISD::FMA, MVT::f32, Expand);
708 // Various VFP goodness
709 if (!UseSoftFloat && !Subtarget->isThumb1Only()) {
710 // int <-> fp are custom expanded into bit_convert + ARMISD ops.
711 if (Subtarget->hasVFP2()) {
712 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
713 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
714 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
715 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
717 // Special handling for half-precision FP.
718 if (!Subtarget->hasFP16()) {
719 setOperationAction(ISD::FP16_TO_FP32, MVT::f32, Expand);
720 setOperationAction(ISD::FP32_TO_FP16, MVT::i32, Expand);
724 // We have target-specific dag combine patterns for the following nodes:
725 // ARMISD::VMOVRRD - No need to call setTargetDAGCombine
726 setTargetDAGCombine(ISD::ADD);
727 setTargetDAGCombine(ISD::SUB);
728 setTargetDAGCombine(ISD::MUL);
730 if (Subtarget->hasV6T2Ops() || Subtarget->hasNEON())
731 setTargetDAGCombine(ISD::OR);
732 if (Subtarget->hasNEON())
733 setTargetDAGCombine(ISD::AND);
735 setStackPointerRegisterToSaveRestore(ARM::SP);
737 if (UseSoftFloat || Subtarget->isThumb1Only() || !Subtarget->hasVFP2())
738 setSchedulingPreference(Sched::RegPressure);
740 setSchedulingPreference(Sched::Hybrid);
742 //// temporary - rewrite interface to use type
743 maxStoresPerMemcpy = maxStoresPerMemcpyOptSize = 1;
745 // On ARM arguments smaller than 4 bytes are extended, so all arguments
746 // are at least 4 bytes aligned.
747 setMinStackArgumentAlignment(4);
749 benefitFromCodePlacementOpt = true;
751 setMinFunctionAlignment(Subtarget->isThumb() ? 1 : 2);
754 // FIXME: It might make sense to define the representative register class as the
755 // nearest super-register that has a non-null superset. For example, DPR_VFP2 is
756 // a super-register of SPR, and DPR is a superset if DPR_VFP2. Consequently,
757 // SPR's representative would be DPR_VFP2. This should work well if register
758 // pressure tracking were modified such that a register use would increment the
759 // pressure of the register class's representative and all of it's super
760 // classes' representatives transitively. We have not implemented this because
761 // of the difficulty prior to coalescing of modeling operand register classes
762 // due to the common occurrence of cross class copies and subregister insertions
764 std::pair<const TargetRegisterClass*, uint8_t>
765 ARMTargetLowering::findRepresentativeClass(EVT VT) const{
766 const TargetRegisterClass *RRC = 0;
768 switch (VT.getSimpleVT().SimpleTy) {
770 return TargetLowering::findRepresentativeClass(VT);
771 // Use DPR as representative register class for all floating point
772 // and vector types. Since there are 32 SPR registers and 32 DPR registers so
773 // the cost is 1 for both f32 and f64.
774 case MVT::f32: case MVT::f64: case MVT::v8i8: case MVT::v4i16:
775 case MVT::v2i32: case MVT::v1i64: case MVT::v2f32:
776 RRC = ARM::DPRRegisterClass;
777 // When NEON is used for SP, only half of the register file is available
778 // because operations that define both SP and DP results will be constrained
779 // to the VFP2 class (D0-D15). We currently model this constraint prior to
780 // coalescing by double-counting the SP regs. See the FIXME above.
781 if (Subtarget->useNEONForSinglePrecisionFP())
784 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
785 case MVT::v4f32: case MVT::v2f64:
786 RRC = ARM::DPRRegisterClass;
790 RRC = ARM::DPRRegisterClass;
794 RRC = ARM::DPRRegisterClass;
798 return std::make_pair(RRC, Cost);
801 const char *ARMTargetLowering::getTargetNodeName(unsigned Opcode) const {
804 case ARMISD::Wrapper: return "ARMISD::Wrapper";
805 case ARMISD::WrapperDYN: return "ARMISD::WrapperDYN";
806 case ARMISD::WrapperPIC: return "ARMISD::WrapperPIC";
807 case ARMISD::WrapperJT: return "ARMISD::WrapperJT";
808 case ARMISD::CALL: return "ARMISD::CALL";
809 case ARMISD::CALL_PRED: return "ARMISD::CALL_PRED";
810 case ARMISD::CALL_NOLINK: return "ARMISD::CALL_NOLINK";
811 case ARMISD::tCALL: return "ARMISD::tCALL";
812 case ARMISD::BRCOND: return "ARMISD::BRCOND";
813 case ARMISD::BR_JT: return "ARMISD::BR_JT";
814 case ARMISD::BR2_JT: return "ARMISD::BR2_JT";
815 case ARMISD::RET_FLAG: return "ARMISD::RET_FLAG";
816 case ARMISD::PIC_ADD: return "ARMISD::PIC_ADD";
817 case ARMISD::CMP: return "ARMISD::CMP";
818 case ARMISD::CMPZ: return "ARMISD::CMPZ";
819 case ARMISD::CMPFP: return "ARMISD::CMPFP";
820 case ARMISD::CMPFPw0: return "ARMISD::CMPFPw0";
821 case ARMISD::BCC_i64: return "ARMISD::BCC_i64";
822 case ARMISD::FMSTAT: return "ARMISD::FMSTAT";
823 case ARMISD::CMOV: return "ARMISD::CMOV";
825 case ARMISD::RBIT: return "ARMISD::RBIT";
827 case ARMISD::FTOSI: return "ARMISD::FTOSI";
828 case ARMISD::FTOUI: return "ARMISD::FTOUI";
829 case ARMISD::SITOF: return "ARMISD::SITOF";
830 case ARMISD::UITOF: return "ARMISD::UITOF";
832 case ARMISD::SRL_FLAG: return "ARMISD::SRL_FLAG";
833 case ARMISD::SRA_FLAG: return "ARMISD::SRA_FLAG";
834 case ARMISD::RRX: return "ARMISD::RRX";
836 case ARMISD::ADDC: return "ARMISD::ADDC";
837 case ARMISD::ADDE: return "ARMISD::ADDE";
838 case ARMISD::SUBC: return "ARMISD::SUBC";
839 case ARMISD::SUBE: return "ARMISD::SUBE";
841 case ARMISD::VMOVRRD: return "ARMISD::VMOVRRD";
842 case ARMISD::VMOVDRR: return "ARMISD::VMOVDRR";
844 case ARMISD::EH_SJLJ_SETJMP: return "ARMISD::EH_SJLJ_SETJMP";
845 case ARMISD::EH_SJLJ_LONGJMP:return "ARMISD::EH_SJLJ_LONGJMP";
846 case ARMISD::EH_SJLJ_DISPATCHSETUP:return "ARMISD::EH_SJLJ_DISPATCHSETUP";
848 case ARMISD::TC_RETURN: return "ARMISD::TC_RETURN";
850 case ARMISD::THREAD_POINTER:return "ARMISD::THREAD_POINTER";
852 case ARMISD::DYN_ALLOC: return "ARMISD::DYN_ALLOC";
854 case ARMISD::MEMBARRIER: return "ARMISD::MEMBARRIER";
855 case ARMISD::MEMBARRIER_MCR: return "ARMISD::MEMBARRIER_MCR";
857 case ARMISD::PRELOAD: return "ARMISD::PRELOAD";
859 case ARMISD::VCEQ: return "ARMISD::VCEQ";
860 case ARMISD::VCEQZ: return "ARMISD::VCEQZ";
861 case ARMISD::VCGE: return "ARMISD::VCGE";
862 case ARMISD::VCGEZ: return "ARMISD::VCGEZ";
863 case ARMISD::VCLEZ: return "ARMISD::VCLEZ";
864 case ARMISD::VCGEU: return "ARMISD::VCGEU";
865 case ARMISD::VCGT: return "ARMISD::VCGT";
866 case ARMISD::VCGTZ: return "ARMISD::VCGTZ";
867 case ARMISD::VCLTZ: return "ARMISD::VCLTZ";
868 case ARMISD::VCGTU: return "ARMISD::VCGTU";
869 case ARMISD::VTST: return "ARMISD::VTST";
871 case ARMISD::VSHL: return "ARMISD::VSHL";
872 case ARMISD::VSHRs: return "ARMISD::VSHRs";
873 case ARMISD::VSHRu: return "ARMISD::VSHRu";
874 case ARMISD::VSHLLs: return "ARMISD::VSHLLs";
875 case ARMISD::VSHLLu: return "ARMISD::VSHLLu";
876 case ARMISD::VSHLLi: return "ARMISD::VSHLLi";
877 case ARMISD::VSHRN: return "ARMISD::VSHRN";
878 case ARMISD::VRSHRs: return "ARMISD::VRSHRs";
879 case ARMISD::VRSHRu: return "ARMISD::VRSHRu";
880 case ARMISD::VRSHRN: return "ARMISD::VRSHRN";
881 case ARMISD::VQSHLs: return "ARMISD::VQSHLs";
882 case ARMISD::VQSHLu: return "ARMISD::VQSHLu";
883 case ARMISD::VQSHLsu: return "ARMISD::VQSHLsu";
884 case ARMISD::VQSHRNs: return "ARMISD::VQSHRNs";
885 case ARMISD::VQSHRNu: return "ARMISD::VQSHRNu";
886 case ARMISD::VQSHRNsu: return "ARMISD::VQSHRNsu";
887 case ARMISD::VQRSHRNs: return "ARMISD::VQRSHRNs";
888 case ARMISD::VQRSHRNu: return "ARMISD::VQRSHRNu";
889 case ARMISD::VQRSHRNsu: return "ARMISD::VQRSHRNsu";
890 case ARMISD::VGETLANEu: return "ARMISD::VGETLANEu";
891 case ARMISD::VGETLANEs: return "ARMISD::VGETLANEs";
892 case ARMISD::VMOVIMM: return "ARMISD::VMOVIMM";
893 case ARMISD::VMVNIMM: return "ARMISD::VMVNIMM";
894 case ARMISD::VDUP: return "ARMISD::VDUP";
895 case ARMISD::VDUPLANE: return "ARMISD::VDUPLANE";
896 case ARMISD::VEXT: return "ARMISD::VEXT";
897 case ARMISD::VREV64: return "ARMISD::VREV64";
898 case ARMISD::VREV32: return "ARMISD::VREV32";
899 case ARMISD::VREV16: return "ARMISD::VREV16";
900 case ARMISD::VZIP: return "ARMISD::VZIP";
901 case ARMISD::VUZP: return "ARMISD::VUZP";
902 case ARMISD::VTRN: return "ARMISD::VTRN";
903 case ARMISD::VTBL1: return "ARMISD::VTBL1";
904 case ARMISD::VTBL2: return "ARMISD::VTBL2";
905 case ARMISD::VMULLs: return "ARMISD::VMULLs";
906 case ARMISD::VMULLu: return "ARMISD::VMULLu";
907 case ARMISD::BUILD_VECTOR: return "ARMISD::BUILD_VECTOR";
908 case ARMISD::FMAX: return "ARMISD::FMAX";
909 case ARMISD::FMIN: return "ARMISD::FMIN";
910 case ARMISD::BFI: return "ARMISD::BFI";
911 case ARMISD::VORRIMM: return "ARMISD::VORRIMM";
912 case ARMISD::VBICIMM: return "ARMISD::VBICIMM";
913 case ARMISD::VBSL: return "ARMISD::VBSL";
914 case ARMISD::VLD2DUP: return "ARMISD::VLD2DUP";
915 case ARMISD::VLD3DUP: return "ARMISD::VLD3DUP";
916 case ARMISD::VLD4DUP: return "ARMISD::VLD4DUP";
917 case ARMISD::VLD1_UPD: return "ARMISD::VLD1_UPD";
918 case ARMISD::VLD2_UPD: return "ARMISD::VLD2_UPD";
919 case ARMISD::VLD3_UPD: return "ARMISD::VLD3_UPD";
920 case ARMISD::VLD4_UPD: return "ARMISD::VLD4_UPD";
921 case ARMISD::VLD2LN_UPD: return "ARMISD::VLD2LN_UPD";
922 case ARMISD::VLD3LN_UPD: return "ARMISD::VLD3LN_UPD";
923 case ARMISD::VLD4LN_UPD: return "ARMISD::VLD4LN_UPD";
924 case ARMISD::VLD2DUP_UPD: return "ARMISD::VLD2DUP_UPD";
925 case ARMISD::VLD3DUP_UPD: return "ARMISD::VLD3DUP_UPD";
926 case ARMISD::VLD4DUP_UPD: return "ARMISD::VLD4DUP_UPD";
927 case ARMISD::VST1_UPD: return "ARMISD::VST1_UPD";
928 case ARMISD::VST2_UPD: return "ARMISD::VST2_UPD";
929 case ARMISD::VST3_UPD: return "ARMISD::VST3_UPD";
930 case ARMISD::VST4_UPD: return "ARMISD::VST4_UPD";
931 case ARMISD::VST2LN_UPD: return "ARMISD::VST2LN_UPD";
932 case ARMISD::VST3LN_UPD: return "ARMISD::VST3LN_UPD";
933 case ARMISD::VST4LN_UPD: return "ARMISD::VST4LN_UPD";
937 EVT ARMTargetLowering::getSetCCResultType(EVT VT) const {
938 if (!VT.isVector()) return getPointerTy();
939 return VT.changeVectorElementTypeToInteger();
942 /// getRegClassFor - Return the register class that should be used for the
943 /// specified value type.
944 TargetRegisterClass *ARMTargetLowering::getRegClassFor(EVT VT) const {
945 // Map v4i64 to QQ registers but do not make the type legal. Similarly map
946 // v8i64 to QQQQ registers. v4i64 and v8i64 are only used for REG_SEQUENCE to
947 // load / store 4 to 8 consecutive D registers.
948 if (Subtarget->hasNEON()) {
949 if (VT == MVT::v4i64)
950 return ARM::QQPRRegisterClass;
951 else if (VT == MVT::v8i64)
952 return ARM::QQQQPRRegisterClass;
954 return TargetLowering::getRegClassFor(VT);
957 // Create a fast isel object.
959 ARMTargetLowering::createFastISel(FunctionLoweringInfo &funcInfo) const {
960 return ARM::createFastISel(funcInfo);
963 /// getMaximalGlobalOffset - Returns the maximal possible offset which can
964 /// be used for loads / stores from the global.
965 unsigned ARMTargetLowering::getMaximalGlobalOffset() const {
966 return (Subtarget->isThumb1Only() ? 127 : 4095);
969 Sched::Preference ARMTargetLowering::getSchedulingPreference(SDNode *N) const {
970 unsigned NumVals = N->getNumValues();
972 return Sched::RegPressure;
974 for (unsigned i = 0; i != NumVals; ++i) {
975 EVT VT = N->getValueType(i);
976 if (VT == MVT::Glue || VT == MVT::Other)
978 if (VT.isFloatingPoint() || VT.isVector())
979 return Sched::Latency;
982 if (!N->isMachineOpcode())
983 return Sched::RegPressure;
985 // Load are scheduled for latency even if there instruction itinerary
987 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
988 const MCInstrDesc &MCID = TII->get(N->getMachineOpcode());
990 if (MCID.getNumDefs() == 0)
991 return Sched::RegPressure;
992 if (!Itins->isEmpty() &&
993 Itins->getOperandCycle(MCID.getSchedClass(), 0) > 2)
994 return Sched::Latency;
996 return Sched::RegPressure;
999 //===----------------------------------------------------------------------===//
1001 //===----------------------------------------------------------------------===//
1003 /// IntCCToARMCC - Convert a DAG integer condition code to an ARM CC
1004 static ARMCC::CondCodes IntCCToARMCC(ISD::CondCode CC) {
1006 default: llvm_unreachable("Unknown condition code!");
1007 case ISD::SETNE: return ARMCC::NE;
1008 case ISD::SETEQ: return ARMCC::EQ;
1009 case ISD::SETGT: return ARMCC::GT;
1010 case ISD::SETGE: return ARMCC::GE;
1011 case ISD::SETLT: return ARMCC::LT;
1012 case ISD::SETLE: return ARMCC::LE;
1013 case ISD::SETUGT: return ARMCC::HI;
1014 case ISD::SETUGE: return ARMCC::HS;
1015 case ISD::SETULT: return ARMCC::LO;
1016 case ISD::SETULE: return ARMCC::LS;
1020 /// FPCCToARMCC - Convert a DAG fp condition code to an ARM CC.
1021 static void FPCCToARMCC(ISD::CondCode CC, ARMCC::CondCodes &CondCode,
1022 ARMCC::CondCodes &CondCode2) {
1023 CondCode2 = ARMCC::AL;
1025 default: llvm_unreachable("Unknown FP condition!");
1027 case ISD::SETOEQ: CondCode = ARMCC::EQ; break;
1029 case ISD::SETOGT: CondCode = ARMCC::GT; break;
1031 case ISD::SETOGE: CondCode = ARMCC::GE; break;
1032 case ISD::SETOLT: CondCode = ARMCC::MI; break;
1033 case ISD::SETOLE: CondCode = ARMCC::LS; break;
1034 case ISD::SETONE: CondCode = ARMCC::MI; CondCode2 = ARMCC::GT; break;
1035 case ISD::SETO: CondCode = ARMCC::VC; break;
1036 case ISD::SETUO: CondCode = ARMCC::VS; break;
1037 case ISD::SETUEQ: CondCode = ARMCC::EQ; CondCode2 = ARMCC::VS; break;
1038 case ISD::SETUGT: CondCode = ARMCC::HI; break;
1039 case ISD::SETUGE: CondCode = ARMCC::PL; break;
1041 case ISD::SETULT: CondCode = ARMCC::LT; break;
1043 case ISD::SETULE: CondCode = ARMCC::LE; break;
1045 case ISD::SETUNE: CondCode = ARMCC::NE; break;
1049 //===----------------------------------------------------------------------===//
1050 // Calling Convention Implementation
1051 //===----------------------------------------------------------------------===//
1053 #include "ARMGenCallingConv.inc"
1055 /// CCAssignFnForNode - Selects the correct CCAssignFn for a the
1056 /// given CallingConvention value.
1057 CCAssignFn *ARMTargetLowering::CCAssignFnForNode(CallingConv::ID CC,
1059 bool isVarArg) const {
1062 llvm_unreachable("Unsupported calling convention");
1063 case CallingConv::Fast:
1064 if (Subtarget->hasVFP2() && !isVarArg) {
1065 if (!Subtarget->isAAPCS_ABI())
1066 return (Return ? RetFastCC_ARM_APCS : FastCC_ARM_APCS);
1067 // For AAPCS ABI targets, just use VFP variant of the calling convention.
1068 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1071 case CallingConv::C: {
1072 // Use target triple & subtarget features to do actual dispatch.
1073 if (!Subtarget->isAAPCS_ABI())
1074 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
1075 else if (Subtarget->hasVFP2() &&
1076 FloatABIType == FloatABI::Hard && !isVarArg)
1077 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1078 return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
1080 case CallingConv::ARM_AAPCS_VFP:
1081 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1082 case CallingConv::ARM_AAPCS:
1083 return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
1084 case CallingConv::ARM_APCS:
1085 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
1089 /// LowerCallResult - Lower the result values of a call into the
1090 /// appropriate copies out of appropriate physical registers.
1092 ARMTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1093 CallingConv::ID CallConv, bool isVarArg,
1094 const SmallVectorImpl<ISD::InputArg> &Ins,
1095 DebugLoc dl, SelectionDAG &DAG,
1096 SmallVectorImpl<SDValue> &InVals) const {
1098 // Assign locations to each value returned by this call.
1099 SmallVector<CCValAssign, 16> RVLocs;
1100 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1101 getTargetMachine(), RVLocs, *DAG.getContext(), Call);
1102 CCInfo.AnalyzeCallResult(Ins,
1103 CCAssignFnForNode(CallConv, /* Return*/ true,
1106 // Copy all of the result registers out of their specified physreg.
1107 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1108 CCValAssign VA = RVLocs[i];
1111 if (VA.needsCustom()) {
1112 // Handle f64 or half of a v2f64.
1113 SDValue Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1115 Chain = Lo.getValue(1);
1116 InFlag = Lo.getValue(2);
1117 VA = RVLocs[++i]; // skip ahead to next loc
1118 SDValue Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1120 Chain = Hi.getValue(1);
1121 InFlag = Hi.getValue(2);
1122 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1124 if (VA.getLocVT() == MVT::v2f64) {
1125 SDValue Vec = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
1126 Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1127 DAG.getConstant(0, MVT::i32));
1129 VA = RVLocs[++i]; // skip ahead to next loc
1130 Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1131 Chain = Lo.getValue(1);
1132 InFlag = Lo.getValue(2);
1133 VA = RVLocs[++i]; // skip ahead to next loc
1134 Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1135 Chain = Hi.getValue(1);
1136 InFlag = Hi.getValue(2);
1137 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1138 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1139 DAG.getConstant(1, MVT::i32));
1142 Val = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), VA.getLocVT(),
1144 Chain = Val.getValue(1);
1145 InFlag = Val.getValue(2);
1148 switch (VA.getLocInfo()) {
1149 default: llvm_unreachable("Unknown loc info!");
1150 case CCValAssign::Full: break;
1151 case CCValAssign::BCvt:
1152 Val = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), Val);
1156 InVals.push_back(Val);
1162 /// LowerMemOpCallTo - Store the argument to the stack.
1164 ARMTargetLowering::LowerMemOpCallTo(SDValue Chain,
1165 SDValue StackPtr, SDValue Arg,
1166 DebugLoc dl, SelectionDAG &DAG,
1167 const CCValAssign &VA,
1168 ISD::ArgFlagsTy Flags) const {
1169 unsigned LocMemOffset = VA.getLocMemOffset();
1170 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
1171 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
1172 return DAG.getStore(Chain, dl, Arg, PtrOff,
1173 MachinePointerInfo::getStack(LocMemOffset),
1177 void ARMTargetLowering::PassF64ArgInRegs(DebugLoc dl, SelectionDAG &DAG,
1178 SDValue Chain, SDValue &Arg,
1179 RegsToPassVector &RegsToPass,
1180 CCValAssign &VA, CCValAssign &NextVA,
1182 SmallVector<SDValue, 8> &MemOpChains,
1183 ISD::ArgFlagsTy Flags) const {
1185 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
1186 DAG.getVTList(MVT::i32, MVT::i32), Arg);
1187 RegsToPass.push_back(std::make_pair(VA.getLocReg(), fmrrd));
1189 if (NextVA.isRegLoc())
1190 RegsToPass.push_back(std::make_pair(NextVA.getLocReg(), fmrrd.getValue(1)));
1192 assert(NextVA.isMemLoc());
1193 if (StackPtr.getNode() == 0)
1194 StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
1196 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, fmrrd.getValue(1),
1202 /// LowerCall - Lowering a call into a callseq_start <-
1203 /// ARMISD:CALL <- callseq_end chain. Also add input and output parameter
1206 ARMTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
1207 CallingConv::ID CallConv, bool isVarArg,
1209 const SmallVectorImpl<ISD::OutputArg> &Outs,
1210 const SmallVectorImpl<SDValue> &OutVals,
1211 const SmallVectorImpl<ISD::InputArg> &Ins,
1212 DebugLoc dl, SelectionDAG &DAG,
1213 SmallVectorImpl<SDValue> &InVals) const {
1214 MachineFunction &MF = DAG.getMachineFunction();
1215 bool IsStructRet = (Outs.empty()) ? false : Outs[0].Flags.isSRet();
1216 bool IsSibCall = false;
1217 // Temporarily disable tail calls so things don't break.
1218 if (!EnableARMTailCalls)
1221 // Check if it's really possible to do a tail call.
1222 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
1223 isVarArg, IsStructRet, MF.getFunction()->hasStructRetAttr(),
1224 Outs, OutVals, Ins, DAG);
1225 // We don't support GuaranteedTailCallOpt for ARM, only automatically
1226 // detected sibcalls.
1233 // Analyze operands of the call, assigning locations to each operand.
1234 SmallVector<CCValAssign, 16> ArgLocs;
1235 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1236 getTargetMachine(), ArgLocs, *DAG.getContext(), Call);
1237 CCInfo.AnalyzeCallOperands(Outs,
1238 CCAssignFnForNode(CallConv, /* Return*/ false,
1241 // Get a count of how many bytes are to be pushed on the stack.
1242 unsigned NumBytes = CCInfo.getNextStackOffset();
1244 // For tail calls, memory operands are available in our caller's stack.
1248 // Adjust the stack pointer for the new arguments...
1249 // These operations are automatically eliminated by the prolog/epilog pass
1251 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
1253 SDValue StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
1255 RegsToPassVector RegsToPass;
1256 SmallVector<SDValue, 8> MemOpChains;
1258 // Walk the register/memloc assignments, inserting copies/loads. In the case
1259 // of tail call optimization, arguments are handled later.
1260 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
1262 ++i, ++realArgIdx) {
1263 CCValAssign &VA = ArgLocs[i];
1264 SDValue Arg = OutVals[realArgIdx];
1265 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
1266 bool isByVal = Flags.isByVal();
1268 // Promote the value if needed.
1269 switch (VA.getLocInfo()) {
1270 default: llvm_unreachable("Unknown loc info!");
1271 case CCValAssign::Full: break;
1272 case CCValAssign::SExt:
1273 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
1275 case CCValAssign::ZExt:
1276 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
1278 case CCValAssign::AExt:
1279 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
1281 case CCValAssign::BCvt:
1282 Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg);
1286 // f64 and v2f64 might be passed in i32 pairs and must be split into pieces
1287 if (VA.needsCustom()) {
1288 if (VA.getLocVT() == MVT::v2f64) {
1289 SDValue Op0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1290 DAG.getConstant(0, MVT::i32));
1291 SDValue Op1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1292 DAG.getConstant(1, MVT::i32));
1294 PassF64ArgInRegs(dl, DAG, Chain, Op0, RegsToPass,
1295 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1297 VA = ArgLocs[++i]; // skip ahead to next loc
1298 if (VA.isRegLoc()) {
1299 PassF64ArgInRegs(dl, DAG, Chain, Op1, RegsToPass,
1300 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1302 assert(VA.isMemLoc());
1304 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Op1,
1305 dl, DAG, VA, Flags));
1308 PassF64ArgInRegs(dl, DAG, Chain, Arg, RegsToPass, VA, ArgLocs[++i],
1309 StackPtr, MemOpChains, Flags);
1311 } else if (VA.isRegLoc()) {
1312 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
1313 } else if (isByVal) {
1314 assert(VA.isMemLoc());
1315 unsigned offset = 0;
1317 // True if this byval aggregate will be split between registers
1319 if (CCInfo.isFirstByValRegValid()) {
1320 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1322 for (i = 0, j = CCInfo.getFirstByValReg(); j < ARM::R4; i++, j++) {
1323 SDValue Const = DAG.getConstant(4*i, MVT::i32);
1324 SDValue AddArg = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, Const);
1325 SDValue Load = DAG.getLoad(PtrVT, dl, Chain, AddArg,
1326 MachinePointerInfo(),
1328 MemOpChains.push_back(Load.getValue(1));
1329 RegsToPass.push_back(std::make_pair(j, Load));
1331 offset = ARM::R4 - CCInfo.getFirstByValReg();
1332 CCInfo.clearFirstByValReg();
1335 unsigned LocMemOffset = VA.getLocMemOffset();
1336 SDValue StkPtrOff = DAG.getIntPtrConstant(LocMemOffset);
1337 SDValue Dst = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr,
1339 SDValue SrcOffset = DAG.getIntPtrConstant(4*offset);
1340 SDValue Src = DAG.getNode(ISD::ADD, dl, getPointerTy(), Arg, SrcOffset);
1341 SDValue SizeNode = DAG.getConstant(Flags.getByValSize() - 4*offset,
1343 // TODO: Disable AlwaysInline when it becomes possible
1344 // to emit a nested call sequence.
1345 MemOpChains.push_back(DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode,
1346 Flags.getByValAlign(),
1347 /*isVolatile=*/false,
1348 /*AlwaysInline=*/true,
1349 MachinePointerInfo(0),
1350 MachinePointerInfo(0)));
1352 } else if (!IsSibCall) {
1353 assert(VA.isMemLoc());
1355 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
1356 dl, DAG, VA, Flags));
1360 if (!MemOpChains.empty())
1361 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1362 &MemOpChains[0], MemOpChains.size());
1364 // Build a sequence of copy-to-reg nodes chained together with token chain
1365 // and flag operands which copy the outgoing args into the appropriate regs.
1367 // Tail call byval lowering might overwrite argument registers so in case of
1368 // tail call optimization the copies to registers are lowered later.
1370 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1371 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1372 RegsToPass[i].second, InFlag);
1373 InFlag = Chain.getValue(1);
1376 // For tail calls lower the arguments to the 'real' stack slot.
1378 // Force all the incoming stack arguments to be loaded from the stack
1379 // before any new outgoing arguments are stored to the stack, because the
1380 // outgoing stack slots may alias the incoming argument stack slots, and
1381 // the alias isn't otherwise explicit. This is slightly more conservative
1382 // than necessary, because it means that each store effectively depends
1383 // on every argument instead of just those arguments it would clobber.
1385 // Do not flag preceding copytoreg stuff together with the following stuff.
1387 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1388 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1389 RegsToPass[i].second, InFlag);
1390 InFlag = Chain.getValue(1);
1395 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
1396 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
1397 // node so that legalize doesn't hack it.
1398 bool isDirect = false;
1399 bool isARMFunc = false;
1400 bool isLocalARMFunc = false;
1401 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1403 if (EnableARMLongCalls) {
1404 assert (getTargetMachine().getRelocationModel() == Reloc::Static
1405 && "long-calls with non-static relocation model!");
1406 // Handle a global address or an external symbol. If it's not one of
1407 // those, the target's already in a register, so we don't need to do
1409 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1410 const GlobalValue *GV = G->getGlobal();
1411 // Create a constant pool entry for the callee address
1412 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1413 ARMConstantPoolValue *CPV =
1414 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue, 0);
1416 // Get the address of the callee into a register
1417 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1418 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1419 Callee = DAG.getLoad(getPointerTy(), dl,
1420 DAG.getEntryNode(), CPAddr,
1421 MachinePointerInfo::getConstantPool(),
1423 } else if (ExternalSymbolSDNode *S=dyn_cast<ExternalSymbolSDNode>(Callee)) {
1424 const char *Sym = S->getSymbol();
1426 // Create a constant pool entry for the callee address
1427 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1428 ARMConstantPoolValue *CPV =
1429 ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym,
1430 ARMPCLabelIndex, 0);
1431 // Get the address of the callee into a register
1432 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1433 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1434 Callee = DAG.getLoad(getPointerTy(), dl,
1435 DAG.getEntryNode(), CPAddr,
1436 MachinePointerInfo::getConstantPool(),
1439 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1440 const GlobalValue *GV = G->getGlobal();
1442 bool isExt = GV->isDeclaration() || GV->isWeakForLinker();
1443 bool isStub = (isExt && Subtarget->isTargetDarwin()) &&
1444 getTargetMachine().getRelocationModel() != Reloc::Static;
1445 isARMFunc = !Subtarget->isThumb() || isStub;
1446 // ARM call to a local ARM function is predicable.
1447 isLocalARMFunc = !Subtarget->isThumb() && (!isExt || !ARMInterworking);
1448 // tBX takes a register source operand.
1449 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1450 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1451 ARMConstantPoolValue *CPV =
1452 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue, 4);
1453 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1454 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1455 Callee = DAG.getLoad(getPointerTy(), dl,
1456 DAG.getEntryNode(), CPAddr,
1457 MachinePointerInfo::getConstantPool(),
1459 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1460 Callee = DAG.getNode(ARMISD::PIC_ADD, dl,
1461 getPointerTy(), Callee, PICLabel);
1463 // On ELF targets for PIC code, direct calls should go through the PLT
1464 unsigned OpFlags = 0;
1465 if (Subtarget->isTargetELF() &&
1466 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1467 OpFlags = ARMII::MO_PLT;
1468 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
1470 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
1472 bool isStub = Subtarget->isTargetDarwin() &&
1473 getTargetMachine().getRelocationModel() != Reloc::Static;
1474 isARMFunc = !Subtarget->isThumb() || isStub;
1475 // tBX takes a register source operand.
1476 const char *Sym = S->getSymbol();
1477 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1478 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1479 ARMConstantPoolValue *CPV =
1480 ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym,
1481 ARMPCLabelIndex, 4);
1482 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1483 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1484 Callee = DAG.getLoad(getPointerTy(), dl,
1485 DAG.getEntryNode(), CPAddr,
1486 MachinePointerInfo::getConstantPool(),
1488 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1489 Callee = DAG.getNode(ARMISD::PIC_ADD, dl,
1490 getPointerTy(), Callee, PICLabel);
1492 unsigned OpFlags = 0;
1493 // On ELF targets for PIC code, direct calls should go through the PLT
1494 if (Subtarget->isTargetELF() &&
1495 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1496 OpFlags = ARMII::MO_PLT;
1497 Callee = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlags);
1501 // FIXME: handle tail calls differently.
1503 if (Subtarget->isThumb()) {
1504 if ((!isDirect || isARMFunc) && !Subtarget->hasV5TOps())
1505 CallOpc = ARMISD::CALL_NOLINK;
1507 CallOpc = isARMFunc ? ARMISD::CALL : ARMISD::tCALL;
1509 CallOpc = (isDirect || Subtarget->hasV5TOps())
1510 ? (isLocalARMFunc ? ARMISD::CALL_PRED : ARMISD::CALL)
1511 : ARMISD::CALL_NOLINK;
1514 std::vector<SDValue> Ops;
1515 Ops.push_back(Chain);
1516 Ops.push_back(Callee);
1518 // Add argument registers to the end of the list so that they are known live
1520 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
1521 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
1522 RegsToPass[i].second.getValueType()));
1524 if (InFlag.getNode())
1525 Ops.push_back(InFlag);
1527 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
1529 return DAG.getNode(ARMISD::TC_RETURN, dl, NodeTys, &Ops[0], Ops.size());
1531 // Returns a chain and a flag for retval copy to use.
1532 Chain = DAG.getNode(CallOpc, dl, NodeTys, &Ops[0], Ops.size());
1533 InFlag = Chain.getValue(1);
1535 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
1536 DAG.getIntPtrConstant(0, true), InFlag);
1538 InFlag = Chain.getValue(1);
1540 // Handle result values, copying them out of physregs into vregs that we
1542 return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins,
1546 /// HandleByVal - Every parameter *after* a byval parameter is passed
1547 /// on the stack. Remember the next parameter register to allocate,
1548 /// and then confiscate the rest of the parameter registers to insure
1551 llvm::ARMTargetLowering::HandleByVal(CCState *State, unsigned &size) const {
1552 unsigned reg = State->AllocateReg(GPRArgRegs, 4);
1553 assert((State->getCallOrPrologue() == Prologue ||
1554 State->getCallOrPrologue() == Call) &&
1555 "unhandled ParmContext");
1556 if ((!State->isFirstByValRegValid()) &&
1557 (ARM::R0 <= reg) && (reg <= ARM::R3)) {
1558 State->setFirstByValReg(reg);
1559 // At a call site, a byval parameter that is split between
1560 // registers and memory needs its size truncated here. In a
1561 // function prologue, such byval parameters are reassembled in
1562 // memory, and are not truncated.
1563 if (State->getCallOrPrologue() == Call) {
1564 unsigned excess = 4 * (ARM::R4 - reg);
1565 assert(size >= excess && "expected larger existing stack allocation");
1569 // Confiscate any remaining parameter registers to preclude their
1570 // assignment to subsequent parameters.
1571 while (State->AllocateReg(GPRArgRegs, 4))
1575 /// MatchingStackOffset - Return true if the given stack call argument is
1576 /// already available in the same position (relatively) of the caller's
1577 /// incoming argument stack.
1579 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
1580 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
1581 const ARMInstrInfo *TII) {
1582 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
1584 if (Arg.getOpcode() == ISD::CopyFromReg) {
1585 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
1586 if (!TargetRegisterInfo::isVirtualRegister(VR))
1588 MachineInstr *Def = MRI->getVRegDef(VR);
1591 if (!Flags.isByVal()) {
1592 if (!TII->isLoadFromStackSlot(Def, FI))
1597 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
1598 if (Flags.isByVal())
1599 // ByVal argument is passed in as a pointer but it's now being
1600 // dereferenced. e.g.
1601 // define @foo(%struct.X* %A) {
1602 // tail call @bar(%struct.X* byval %A)
1605 SDValue Ptr = Ld->getBasePtr();
1606 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
1609 FI = FINode->getIndex();
1613 assert(FI != INT_MAX);
1614 if (!MFI->isFixedObjectIndex(FI))
1616 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
1619 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
1620 /// for tail call optimization. Targets which want to do tail call
1621 /// optimization should implement this function.
1623 ARMTargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
1624 CallingConv::ID CalleeCC,
1626 bool isCalleeStructRet,
1627 bool isCallerStructRet,
1628 const SmallVectorImpl<ISD::OutputArg> &Outs,
1629 const SmallVectorImpl<SDValue> &OutVals,
1630 const SmallVectorImpl<ISD::InputArg> &Ins,
1631 SelectionDAG& DAG) const {
1632 const Function *CallerF = DAG.getMachineFunction().getFunction();
1633 CallingConv::ID CallerCC = CallerF->getCallingConv();
1634 bool CCMatch = CallerCC == CalleeCC;
1636 // Look for obvious safe cases to perform tail call optimization that do not
1637 // require ABI changes. This is what gcc calls sibcall.
1639 // Do not sibcall optimize vararg calls unless the call site is not passing
1641 if (isVarArg && !Outs.empty())
1644 // Also avoid sibcall optimization if either caller or callee uses struct
1645 // return semantics.
1646 if (isCalleeStructRet || isCallerStructRet)
1649 // FIXME: Completely disable sibcall for Thumb1 since Thumb1RegisterInfo::
1650 // emitEpilogue is not ready for them. Thumb tail calls also use t2B, as
1651 // the Thumb1 16-bit unconditional branch doesn't have sufficient relocation
1652 // support in the assembler and linker to be used. This would need to be
1653 // fixed to fully support tail calls in Thumb1.
1655 // Doing this is tricky, since the LDM/POP instruction on Thumb doesn't take
1656 // LR. This means if we need to reload LR, it takes an extra instructions,
1657 // which outweighs the value of the tail call; but here we don't know yet
1658 // whether LR is going to be used. Probably the right approach is to
1659 // generate the tail call here and turn it back into CALL/RET in
1660 // emitEpilogue if LR is used.
1662 // Thumb1 PIC calls to external symbols use BX, so they can be tail calls,
1663 // but we need to make sure there are enough registers; the only valid
1664 // registers are the 4 used for parameters. We don't currently do this
1666 if (Subtarget->isThumb1Only())
1669 // If the calling conventions do not match, then we'd better make sure the
1670 // results are returned in the same way as what the caller expects.
1672 SmallVector<CCValAssign, 16> RVLocs1;
1673 ARMCCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(),
1674 getTargetMachine(), RVLocs1, *DAG.getContext(), Call);
1675 CCInfo1.AnalyzeCallResult(Ins, CCAssignFnForNode(CalleeCC, true, isVarArg));
1677 SmallVector<CCValAssign, 16> RVLocs2;
1678 ARMCCState CCInfo2(CallerCC, false, DAG.getMachineFunction(),
1679 getTargetMachine(), RVLocs2, *DAG.getContext(), Call);
1680 CCInfo2.AnalyzeCallResult(Ins, CCAssignFnForNode(CallerCC, true, isVarArg));
1682 if (RVLocs1.size() != RVLocs2.size())
1684 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
1685 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
1687 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
1689 if (RVLocs1[i].isRegLoc()) {
1690 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
1693 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
1699 // If the callee takes no arguments then go on to check the results of the
1701 if (!Outs.empty()) {
1702 // Check if stack adjustment is needed. For now, do not do this if any
1703 // argument is passed on the stack.
1704 SmallVector<CCValAssign, 16> ArgLocs;
1705 ARMCCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
1706 getTargetMachine(), ArgLocs, *DAG.getContext(), Call);
1707 CCInfo.AnalyzeCallOperands(Outs,
1708 CCAssignFnForNode(CalleeCC, false, isVarArg));
1709 if (CCInfo.getNextStackOffset()) {
1710 MachineFunction &MF = DAG.getMachineFunction();
1712 // Check if the arguments are already laid out in the right way as
1713 // the caller's fixed stack objects.
1714 MachineFrameInfo *MFI = MF.getFrameInfo();
1715 const MachineRegisterInfo *MRI = &MF.getRegInfo();
1716 const ARMInstrInfo *TII =
1717 ((ARMTargetMachine&)getTargetMachine()).getInstrInfo();
1718 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
1720 ++i, ++realArgIdx) {
1721 CCValAssign &VA = ArgLocs[i];
1722 EVT RegVT = VA.getLocVT();
1723 SDValue Arg = OutVals[realArgIdx];
1724 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
1725 if (VA.getLocInfo() == CCValAssign::Indirect)
1727 if (VA.needsCustom()) {
1728 // f64 and vector types are split into multiple registers or
1729 // register/stack-slot combinations. The types will not match
1730 // the registers; give up on memory f64 refs until we figure
1731 // out what to do about this.
1734 if (!ArgLocs[++i].isRegLoc())
1736 if (RegVT == MVT::v2f64) {
1737 if (!ArgLocs[++i].isRegLoc())
1739 if (!ArgLocs[++i].isRegLoc())
1742 } else if (!VA.isRegLoc()) {
1743 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
1755 ARMTargetLowering::LowerReturn(SDValue Chain,
1756 CallingConv::ID CallConv, bool isVarArg,
1757 const SmallVectorImpl<ISD::OutputArg> &Outs,
1758 const SmallVectorImpl<SDValue> &OutVals,
1759 DebugLoc dl, SelectionDAG &DAG) const {
1761 // CCValAssign - represent the assignment of the return value to a location.
1762 SmallVector<CCValAssign, 16> RVLocs;
1764 // CCState - Info about the registers and stack slots.
1765 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1766 getTargetMachine(), RVLocs, *DAG.getContext(), Call);
1768 // Analyze outgoing return values.
1769 CCInfo.AnalyzeReturn(Outs, CCAssignFnForNode(CallConv, /* Return */ true,
1772 // If this is the first return lowered for this function, add
1773 // the regs to the liveout set for the function.
1774 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
1775 for (unsigned i = 0; i != RVLocs.size(); ++i)
1776 if (RVLocs[i].isRegLoc())
1777 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
1782 // Copy the result values into the output registers.
1783 for (unsigned i = 0, realRVLocIdx = 0;
1785 ++i, ++realRVLocIdx) {
1786 CCValAssign &VA = RVLocs[i];
1787 assert(VA.isRegLoc() && "Can only return in registers!");
1789 SDValue Arg = OutVals[realRVLocIdx];
1791 switch (VA.getLocInfo()) {
1792 default: llvm_unreachable("Unknown loc info!");
1793 case CCValAssign::Full: break;
1794 case CCValAssign::BCvt:
1795 Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg);
1799 if (VA.needsCustom()) {
1800 if (VA.getLocVT() == MVT::v2f64) {
1801 // Extract the first half and return it in two registers.
1802 SDValue Half = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1803 DAG.getConstant(0, MVT::i32));
1804 SDValue HalfGPRs = DAG.getNode(ARMISD::VMOVRRD, dl,
1805 DAG.getVTList(MVT::i32, MVT::i32), Half);
1807 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), HalfGPRs, Flag);
1808 Flag = Chain.getValue(1);
1809 VA = RVLocs[++i]; // skip ahead to next loc
1810 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
1811 HalfGPRs.getValue(1), Flag);
1812 Flag = Chain.getValue(1);
1813 VA = RVLocs[++i]; // skip ahead to next loc
1815 // Extract the 2nd half and fall through to handle it as an f64 value.
1816 Arg = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1817 DAG.getConstant(1, MVT::i32));
1819 // Legalize ret f64 -> ret 2 x i32. We always have fmrrd if f64 is
1821 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
1822 DAG.getVTList(MVT::i32, MVT::i32), &Arg, 1);
1823 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), fmrrd, Flag);
1824 Flag = Chain.getValue(1);
1825 VA = RVLocs[++i]; // skip ahead to next loc
1826 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), fmrrd.getValue(1),
1829 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), Arg, Flag);
1831 // Guarantee that all emitted copies are
1832 // stuck together, avoiding something bad.
1833 Flag = Chain.getValue(1);
1838 result = DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, Chain, Flag);
1840 result = DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, Chain);
1845 bool ARMTargetLowering::isUsedByReturnOnly(SDNode *N) const {
1846 if (N->getNumValues() != 1)
1848 if (!N->hasNUsesOfValue(1, 0))
1851 unsigned NumCopies = 0;
1853 SDNode *Use = *N->use_begin();
1854 if (Use->getOpcode() == ISD::CopyToReg) {
1855 Copies[NumCopies++] = Use;
1856 } else if (Use->getOpcode() == ARMISD::VMOVRRD) {
1857 // f64 returned in a pair of GPRs.
1858 for (SDNode::use_iterator UI = Use->use_begin(), UE = Use->use_end();
1860 if (UI->getOpcode() != ISD::CopyToReg)
1862 Copies[UI.getUse().getResNo()] = *UI;
1865 } else if (Use->getOpcode() == ISD::BITCAST) {
1866 // f32 returned in a single GPR.
1867 if (!Use->hasNUsesOfValue(1, 0))
1869 Use = *Use->use_begin();
1870 if (Use->getOpcode() != ISD::CopyToReg || !Use->hasNUsesOfValue(1, 0))
1872 Copies[NumCopies++] = Use;
1877 if (NumCopies != 1 && NumCopies != 2)
1880 bool HasRet = false;
1881 for (unsigned i = 0; i < NumCopies; ++i) {
1882 SDNode *Copy = Copies[i];
1883 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
1885 if (UI->getOpcode() == ISD::CopyToReg) {
1887 if (Use == Copies[0] || Use == Copies[1])
1891 if (UI->getOpcode() != ARMISD::RET_FLAG)
1900 bool ARMTargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
1901 if (!EnableARMTailCalls)
1904 if (!CI->isTailCall())
1907 return !Subtarget->isThumb1Only();
1910 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
1911 // their target counterpart wrapped in the ARMISD::Wrapper node. Suppose N is
1912 // one of the above mentioned nodes. It has to be wrapped because otherwise
1913 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
1914 // be used to form addressing mode. These wrapped nodes will be selected
1916 static SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) {
1917 EVT PtrVT = Op.getValueType();
1918 // FIXME there is no actual debug info here
1919 DebugLoc dl = Op.getDebugLoc();
1920 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
1922 if (CP->isMachineConstantPoolEntry())
1923 Res = DAG.getTargetConstantPool(CP->getMachineCPVal(), PtrVT,
1924 CP->getAlignment());
1926 Res = DAG.getTargetConstantPool(CP->getConstVal(), PtrVT,
1927 CP->getAlignment());
1928 return DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Res);
1931 unsigned ARMTargetLowering::getJumpTableEncoding() const {
1932 return MachineJumpTableInfo::EK_Inline;
1935 SDValue ARMTargetLowering::LowerBlockAddress(SDValue Op,
1936 SelectionDAG &DAG) const {
1937 MachineFunction &MF = DAG.getMachineFunction();
1938 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1939 unsigned ARMPCLabelIndex = 0;
1940 DebugLoc DL = Op.getDebugLoc();
1941 EVT PtrVT = getPointerTy();
1942 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
1943 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
1945 if (RelocM == Reloc::Static) {
1946 CPAddr = DAG.getTargetConstantPool(BA, PtrVT, 4);
1948 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
1949 ARMPCLabelIndex = AFI->createPICLabelUId();
1950 ARMConstantPoolValue *CPV =
1951 ARMConstantPoolConstant::Create(BA, ARMPCLabelIndex,
1952 ARMCP::CPBlockAddress, PCAdj);
1953 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1955 CPAddr = DAG.getNode(ARMISD::Wrapper, DL, PtrVT, CPAddr);
1956 SDValue Result = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), CPAddr,
1957 MachinePointerInfo::getConstantPool(),
1959 if (RelocM == Reloc::Static)
1961 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1962 return DAG.getNode(ARMISD::PIC_ADD, DL, PtrVT, Result, PICLabel);
1965 // Lower ISD::GlobalTLSAddress using the "general dynamic" model
1967 ARMTargetLowering::LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA,
1968 SelectionDAG &DAG) const {
1969 DebugLoc dl = GA->getDebugLoc();
1970 EVT PtrVT = getPointerTy();
1971 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
1972 MachineFunction &MF = DAG.getMachineFunction();
1973 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1974 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1975 ARMConstantPoolValue *CPV =
1976 ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex,
1977 ARMCP::CPValue, PCAdj, ARMCP::TLSGD, true);
1978 SDValue Argument = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1979 Argument = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Argument);
1980 Argument = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Argument,
1981 MachinePointerInfo::getConstantPool(),
1983 SDValue Chain = Argument.getValue(1);
1985 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1986 Argument = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Argument, PICLabel);
1988 // call __tls_get_addr.
1991 Entry.Node = Argument;
1992 Entry.Ty = (Type *) Type::getInt32Ty(*DAG.getContext());
1993 Args.push_back(Entry);
1994 // FIXME: is there useful debug info available here?
1995 std::pair<SDValue, SDValue> CallResult =
1996 LowerCallTo(Chain, (Type *) Type::getInt32Ty(*DAG.getContext()),
1997 false, false, false, false,
1998 0, CallingConv::C, false, /*isReturnValueUsed=*/true,
1999 DAG.getExternalSymbol("__tls_get_addr", PtrVT), Args, DAG, dl);
2000 return CallResult.first;
2003 // Lower ISD::GlobalTLSAddress using the "initial exec" or
2004 // "local exec" model.
2006 ARMTargetLowering::LowerToTLSExecModels(GlobalAddressSDNode *GA,
2007 SelectionDAG &DAG) const {
2008 const GlobalValue *GV = GA->getGlobal();
2009 DebugLoc dl = GA->getDebugLoc();
2011 SDValue Chain = DAG.getEntryNode();
2012 EVT PtrVT = getPointerTy();
2013 // Get the Thread Pointer
2014 SDValue ThreadPointer = DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
2016 if (GV->isDeclaration()) {
2017 MachineFunction &MF = DAG.getMachineFunction();
2018 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2019 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2020 // Initial exec model.
2021 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
2022 ARMConstantPoolValue *CPV =
2023 ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex,
2024 ARMCP::CPValue, PCAdj, ARMCP::GOTTPOFF,
2026 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2027 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
2028 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2029 MachinePointerInfo::getConstantPool(),
2031 Chain = Offset.getValue(1);
2033 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2034 Offset = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Offset, PICLabel);
2036 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2037 MachinePointerInfo::getConstantPool(),
2041 ARMConstantPoolValue *CPV =
2042 ARMConstantPoolConstant::Create(GV, ARMCP::TPOFF);
2043 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2044 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
2045 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2046 MachinePointerInfo::getConstantPool(),
2050 // The address of the thread local variable is the add of the thread
2051 // pointer with the offset of the variable.
2052 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
2056 ARMTargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
2057 // TODO: implement the "local dynamic" model
2058 assert(Subtarget->isTargetELF() &&
2059 "TLS not implemented for non-ELF targets");
2060 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
2061 // If the relocation model is PIC, use the "General Dynamic" TLS Model,
2062 // otherwise use the "Local Exec" TLS Model
2063 if (getTargetMachine().getRelocationModel() == Reloc::PIC_)
2064 return LowerToTLSGeneralDynamicModel(GA, DAG);
2066 return LowerToTLSExecModels(GA, DAG);
2069 SDValue ARMTargetLowering::LowerGlobalAddressELF(SDValue Op,
2070 SelectionDAG &DAG) const {
2071 EVT PtrVT = getPointerTy();
2072 DebugLoc dl = Op.getDebugLoc();
2073 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2074 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2075 if (RelocM == Reloc::PIC_) {
2076 bool UseGOTOFF = GV->hasLocalLinkage() || GV->hasHiddenVisibility();
2077 ARMConstantPoolValue *CPV =
2078 ARMConstantPoolConstant::Create(GV,
2079 UseGOTOFF ? ARMCP::GOTOFF : ARMCP::GOT);
2080 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2081 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2082 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
2084 MachinePointerInfo::getConstantPool(),
2086 SDValue Chain = Result.getValue(1);
2087 SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(PtrVT);
2088 Result = DAG.getNode(ISD::ADD, dl, PtrVT, Result, GOT);
2090 Result = DAG.getLoad(PtrVT, dl, Chain, Result,
2091 MachinePointerInfo::getGOT(), false, false, 0);
2095 // If we have T2 ops, we can materialize the address directly via movt/movw
2096 // pair. This is always cheaper.
2097 if (Subtarget->useMovt()) {
2099 // FIXME: Once remat is capable of dealing with instructions with register
2100 // operands, expand this into two nodes.
2101 return DAG.getNode(ARMISD::Wrapper, dl, PtrVT,
2102 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2104 SDValue CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
2105 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2106 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2107 MachinePointerInfo::getConstantPool(),
2112 SDValue ARMTargetLowering::LowerGlobalAddressDarwin(SDValue Op,
2113 SelectionDAG &DAG) const {
2114 EVT PtrVT = getPointerTy();
2115 DebugLoc dl = Op.getDebugLoc();
2116 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2117 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2118 MachineFunction &MF = DAG.getMachineFunction();
2119 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2121 // FIXME: Enable this for static codegen when tool issues are fixed.
2122 if (Subtarget->useMovt() && RelocM != Reloc::Static) {
2124 // FIXME: Once remat is capable of dealing with instructions with register
2125 // operands, expand this into two nodes.
2126 if (RelocM == Reloc::Static)
2127 return DAG.getNode(ARMISD::Wrapper, dl, PtrVT,
2128 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2130 unsigned Wrapper = (RelocM == Reloc::PIC_)
2131 ? ARMISD::WrapperPIC : ARMISD::WrapperDYN;
2132 SDValue Result = DAG.getNode(Wrapper, dl, PtrVT,
2133 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2134 if (Subtarget->GVIsIndirectSymbol(GV, RelocM))
2135 Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Result,
2136 MachinePointerInfo::getGOT(), false, false, 0);
2140 unsigned ARMPCLabelIndex = 0;
2142 if (RelocM == Reloc::Static) {
2143 CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
2145 ARMPCLabelIndex = AFI->createPICLabelUId();
2146 unsigned PCAdj = (RelocM != Reloc::PIC_) ? 0 : (Subtarget->isThumb()?4:8);
2147 ARMConstantPoolValue *CPV =
2148 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue,
2150 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2152 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2154 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2155 MachinePointerInfo::getConstantPool(),
2157 SDValue Chain = Result.getValue(1);
2159 if (RelocM == Reloc::PIC_) {
2160 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2161 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2164 if (Subtarget->GVIsIndirectSymbol(GV, RelocM))
2165 Result = DAG.getLoad(PtrVT, dl, Chain, Result, MachinePointerInfo::getGOT(),
2171 SDValue ARMTargetLowering::LowerGLOBAL_OFFSET_TABLE(SDValue Op,
2172 SelectionDAG &DAG) const {
2173 assert(Subtarget->isTargetELF() &&
2174 "GLOBAL OFFSET TABLE not implemented for non-ELF targets");
2175 MachineFunction &MF = DAG.getMachineFunction();
2176 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2177 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2178 EVT PtrVT = getPointerTy();
2179 DebugLoc dl = Op.getDebugLoc();
2180 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
2181 ARMConstantPoolValue *CPV =
2182 ARMConstantPoolSymbol::Create(*DAG.getContext(), "_GLOBAL_OFFSET_TABLE_",
2183 ARMPCLabelIndex, PCAdj);
2184 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2185 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2186 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2187 MachinePointerInfo::getConstantPool(),
2189 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2190 return DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2194 ARMTargetLowering::LowerEH_SJLJ_DISPATCHSETUP(SDValue Op, SelectionDAG &DAG)
2196 DebugLoc dl = Op.getDebugLoc();
2197 return DAG.getNode(ARMISD::EH_SJLJ_DISPATCHSETUP, dl, MVT::Other,
2198 Op.getOperand(0), Op.getOperand(1));
2202 ARMTargetLowering::LowerEH_SJLJ_SETJMP(SDValue Op, SelectionDAG &DAG) const {
2203 DebugLoc dl = Op.getDebugLoc();
2204 SDValue Val = DAG.getConstant(0, MVT::i32);
2205 return DAG.getNode(ARMISD::EH_SJLJ_SETJMP, dl, MVT::i32, Op.getOperand(0),
2206 Op.getOperand(1), Val);
2210 ARMTargetLowering::LowerEH_SJLJ_LONGJMP(SDValue Op, SelectionDAG &DAG) const {
2211 DebugLoc dl = Op.getDebugLoc();
2212 return DAG.getNode(ARMISD::EH_SJLJ_LONGJMP, dl, MVT::Other, Op.getOperand(0),
2213 Op.getOperand(1), DAG.getConstant(0, MVT::i32));
2217 ARMTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG,
2218 const ARMSubtarget *Subtarget) const {
2219 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
2220 DebugLoc dl = Op.getDebugLoc();
2222 default: return SDValue(); // Don't custom lower most intrinsics.
2223 case Intrinsic::arm_thread_pointer: {
2224 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2225 return DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
2227 case Intrinsic::eh_sjlj_lsda: {
2228 MachineFunction &MF = DAG.getMachineFunction();
2229 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2230 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2231 EVT PtrVT = getPointerTy();
2232 DebugLoc dl = Op.getDebugLoc();
2233 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2235 unsigned PCAdj = (RelocM != Reloc::PIC_)
2236 ? 0 : (Subtarget->isThumb() ? 4 : 8);
2237 ARMConstantPoolValue *CPV =
2238 ARMConstantPoolConstant::Create(MF.getFunction(), ARMPCLabelIndex,
2239 ARMCP::CPLSDA, PCAdj);
2240 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2241 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2243 DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2244 MachinePointerInfo::getConstantPool(),
2247 if (RelocM == Reloc::PIC_) {
2248 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2249 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2253 case Intrinsic::arm_neon_vmulls:
2254 case Intrinsic::arm_neon_vmullu: {
2255 unsigned NewOpc = (IntNo == Intrinsic::arm_neon_vmulls)
2256 ? ARMISD::VMULLs : ARMISD::VMULLu;
2257 return DAG.getNode(NewOpc, Op.getDebugLoc(), Op.getValueType(),
2258 Op.getOperand(1), Op.getOperand(2));
2263 static SDValue LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG,
2264 const ARMSubtarget *Subtarget) {
2265 DebugLoc dl = Op.getDebugLoc();
2266 if (!Subtarget->hasDataBarrier()) {
2267 // Some ARMv6 cpus can support data barriers with an mcr instruction.
2268 // Thumb1 and pre-v6 ARM mode use a libcall instead and should never get
2270 assert(Subtarget->hasV6Ops() && !Subtarget->isThumb() &&
2271 "Unexpected ISD::MEMBARRIER encountered. Should be libcall!");
2272 return DAG.getNode(ARMISD::MEMBARRIER_MCR, dl, MVT::Other, Op.getOperand(0),
2273 DAG.getConstant(0, MVT::i32));
2276 SDValue Op5 = Op.getOperand(5);
2277 bool isDeviceBarrier = cast<ConstantSDNode>(Op5)->getZExtValue() != 0;
2278 unsigned isLL = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
2279 unsigned isLS = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
2280 bool isOnlyStoreBarrier = (isLL == 0 && isLS == 0);
2282 ARM_MB::MemBOpt DMBOpt;
2283 if (isDeviceBarrier)
2284 DMBOpt = isOnlyStoreBarrier ? ARM_MB::ST : ARM_MB::SY;
2286 DMBOpt = isOnlyStoreBarrier ? ARM_MB::ISHST : ARM_MB::ISH;
2287 return DAG.getNode(ARMISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0),
2288 DAG.getConstant(DMBOpt, MVT::i32));
2292 static SDValue LowerATOMIC_FENCE(SDValue Op, SelectionDAG &DAG,
2293 const ARMSubtarget *Subtarget) {
2294 // FIXME: handle "fence singlethread" more efficiently.
2295 DebugLoc dl = Op.getDebugLoc();
2296 if (!Subtarget->hasDataBarrier()) {
2297 // Some ARMv6 cpus can support data barriers with an mcr instruction.
2298 // Thumb1 and pre-v6 ARM mode use a libcall instead and should never get
2300 assert(Subtarget->hasV6Ops() && !Subtarget->isThumb() &&
2301 "Unexpected ISD::MEMBARRIER encountered. Should be libcall!");
2302 return DAG.getNode(ARMISD::MEMBARRIER_MCR, dl, MVT::Other, Op.getOperand(0),
2303 DAG.getConstant(0, MVT::i32));
2306 return DAG.getNode(ARMISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0),
2307 DAG.getConstant(ARM_MB::ISH, MVT::i32));
2310 static SDValue LowerPREFETCH(SDValue Op, SelectionDAG &DAG,
2311 const ARMSubtarget *Subtarget) {
2312 // ARM pre v5TE and Thumb1 does not have preload instructions.
2313 if (!(Subtarget->isThumb2() ||
2314 (!Subtarget->isThumb1Only() && Subtarget->hasV5TEOps())))
2315 // Just preserve the chain.
2316 return Op.getOperand(0);
2318 DebugLoc dl = Op.getDebugLoc();
2319 unsigned isRead = ~cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue() & 1;
2321 (!Subtarget->hasV7Ops() || !Subtarget->hasMPExtension()))
2322 // ARMv7 with MP extension has PLDW.
2323 return Op.getOperand(0);
2325 unsigned isData = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
2326 if (Subtarget->isThumb()) {
2328 isRead = ~isRead & 1;
2329 isData = ~isData & 1;
2332 return DAG.getNode(ARMISD::PRELOAD, dl, MVT::Other, Op.getOperand(0),
2333 Op.getOperand(1), DAG.getConstant(isRead, MVT::i32),
2334 DAG.getConstant(isData, MVT::i32));
2337 static SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) {
2338 MachineFunction &MF = DAG.getMachineFunction();
2339 ARMFunctionInfo *FuncInfo = MF.getInfo<ARMFunctionInfo>();
2341 // vastart just stores the address of the VarArgsFrameIndex slot into the
2342 // memory location argument.
2343 DebugLoc dl = Op.getDebugLoc();
2344 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2345 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
2346 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
2347 return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1),
2348 MachinePointerInfo(SV), false, false, 0);
2352 ARMTargetLowering::GetF64FormalArgument(CCValAssign &VA, CCValAssign &NextVA,
2353 SDValue &Root, SelectionDAG &DAG,
2354 DebugLoc dl) const {
2355 MachineFunction &MF = DAG.getMachineFunction();
2356 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2358 TargetRegisterClass *RC;
2359 if (AFI->isThumb1OnlyFunction())
2360 RC = ARM::tGPRRegisterClass;
2362 RC = ARM::GPRRegisterClass;
2364 // Transform the arguments stored in physical registers into virtual ones.
2365 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2366 SDValue ArgValue = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2369 if (NextVA.isMemLoc()) {
2370 MachineFrameInfo *MFI = MF.getFrameInfo();
2371 int FI = MFI->CreateFixedObject(4, NextVA.getLocMemOffset(), true);
2373 // Create load node to retrieve arguments from the stack.
2374 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2375 ArgValue2 = DAG.getLoad(MVT::i32, dl, Root, FIN,
2376 MachinePointerInfo::getFixedStack(FI),
2379 Reg = MF.addLiveIn(NextVA.getLocReg(), RC);
2380 ArgValue2 = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2383 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, ArgValue, ArgValue2);
2387 ARMTargetLowering::computeRegArea(CCState &CCInfo, MachineFunction &MF,
2388 unsigned &VARegSize, unsigned &VARegSaveSize)
2391 if (CCInfo.isFirstByValRegValid())
2392 NumGPRs = ARM::R4 - CCInfo.getFirstByValReg();
2394 unsigned int firstUnalloced;
2395 firstUnalloced = CCInfo.getFirstUnallocated(GPRArgRegs,
2396 sizeof(GPRArgRegs) /
2397 sizeof(GPRArgRegs[0]));
2398 NumGPRs = (firstUnalloced <= 3) ? (4 - firstUnalloced) : 0;
2401 unsigned Align = MF.getTarget().getFrameLowering()->getStackAlignment();
2402 VARegSize = NumGPRs * 4;
2403 VARegSaveSize = (VARegSize + Align - 1) & ~(Align - 1);
2406 // The remaining GPRs hold either the beginning of variable-argument
2407 // data, or the beginning of an aggregate passed by value (usuall
2408 // byval). Either way, we allocate stack slots adjacent to the data
2409 // provided by our caller, and store the unallocated registers there.
2410 // If this is a variadic function, the va_list pointer will begin with
2411 // these values; otherwise, this reassembles a (byval) structure that
2412 // was split between registers and memory.
2414 ARMTargetLowering::VarArgStyleRegisters(CCState &CCInfo, SelectionDAG &DAG,
2415 DebugLoc dl, SDValue &Chain,
2416 unsigned ArgOffset) const {
2417 MachineFunction &MF = DAG.getMachineFunction();
2418 MachineFrameInfo *MFI = MF.getFrameInfo();
2419 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2420 unsigned firstRegToSaveIndex;
2421 if (CCInfo.isFirstByValRegValid())
2422 firstRegToSaveIndex = CCInfo.getFirstByValReg() - ARM::R0;
2424 firstRegToSaveIndex = CCInfo.getFirstUnallocated
2425 (GPRArgRegs, sizeof(GPRArgRegs) / sizeof(GPRArgRegs[0]));
2428 unsigned VARegSize, VARegSaveSize;
2429 computeRegArea(CCInfo, MF, VARegSize, VARegSaveSize);
2430 if (VARegSaveSize) {
2431 // If this function is vararg, store any remaining integer argument regs
2432 // to their spots on the stack so that they may be loaded by deferencing
2433 // the result of va_next.
2434 AFI->setVarArgsRegSaveSize(VARegSaveSize);
2435 AFI->setVarArgsFrameIndex(MFI->CreateFixedObject(VARegSaveSize,
2436 ArgOffset + VARegSaveSize
2439 SDValue FIN = DAG.getFrameIndex(AFI->getVarArgsFrameIndex(),
2442 SmallVector<SDValue, 4> MemOps;
2443 for (; firstRegToSaveIndex < 4; ++firstRegToSaveIndex) {
2444 TargetRegisterClass *RC;
2445 if (AFI->isThumb1OnlyFunction())
2446 RC = ARM::tGPRRegisterClass;
2448 RC = ARM::GPRRegisterClass;
2450 unsigned VReg = MF.addLiveIn(GPRArgRegs[firstRegToSaveIndex], RC);
2451 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
2453 DAG.getStore(Val.getValue(1), dl, Val, FIN,
2454 MachinePointerInfo::getFixedStack(AFI->getVarArgsFrameIndex()),
2456 MemOps.push_back(Store);
2457 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), FIN,
2458 DAG.getConstant(4, getPointerTy()));
2460 if (!MemOps.empty())
2461 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2462 &MemOps[0], MemOps.size());
2464 // This will point to the next argument passed via stack.
2465 AFI->setVarArgsFrameIndex(MFI->CreateFixedObject(4, ArgOffset, true));
2469 ARMTargetLowering::LowerFormalArguments(SDValue Chain,
2470 CallingConv::ID CallConv, bool isVarArg,
2471 const SmallVectorImpl<ISD::InputArg>
2473 DebugLoc dl, SelectionDAG &DAG,
2474 SmallVectorImpl<SDValue> &InVals)
2476 MachineFunction &MF = DAG.getMachineFunction();
2477 MachineFrameInfo *MFI = MF.getFrameInfo();
2479 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2481 // Assign locations to all of the incoming arguments.
2482 SmallVector<CCValAssign, 16> ArgLocs;
2483 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2484 getTargetMachine(), ArgLocs, *DAG.getContext(), Prologue);
2485 CCInfo.AnalyzeFormalArguments(Ins,
2486 CCAssignFnForNode(CallConv, /* Return*/ false,
2489 SmallVector<SDValue, 16> ArgValues;
2490 int lastInsIndex = -1;
2493 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2494 CCValAssign &VA = ArgLocs[i];
2496 // Arguments stored in registers.
2497 if (VA.isRegLoc()) {
2498 EVT RegVT = VA.getLocVT();
2500 if (VA.needsCustom()) {
2501 // f64 and vector types are split up into multiple registers or
2502 // combinations of registers and stack slots.
2503 if (VA.getLocVT() == MVT::v2f64) {
2504 SDValue ArgValue1 = GetF64FormalArgument(VA, ArgLocs[++i],
2506 VA = ArgLocs[++i]; // skip ahead to next loc
2508 if (VA.isMemLoc()) {
2509 int FI = MFI->CreateFixedObject(8, VA.getLocMemOffset(), true);
2510 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2511 ArgValue2 = DAG.getLoad(MVT::f64, dl, Chain, FIN,
2512 MachinePointerInfo::getFixedStack(FI),
2515 ArgValue2 = GetF64FormalArgument(VA, ArgLocs[++i],
2518 ArgValue = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
2519 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
2520 ArgValue, ArgValue1, DAG.getIntPtrConstant(0));
2521 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
2522 ArgValue, ArgValue2, DAG.getIntPtrConstant(1));
2524 ArgValue = GetF64FormalArgument(VA, ArgLocs[++i], Chain, DAG, dl);
2527 TargetRegisterClass *RC;
2529 if (RegVT == MVT::f32)
2530 RC = ARM::SPRRegisterClass;
2531 else if (RegVT == MVT::f64)
2532 RC = ARM::DPRRegisterClass;
2533 else if (RegVT == MVT::v2f64)
2534 RC = ARM::QPRRegisterClass;
2535 else if (RegVT == MVT::i32)
2536 RC = (AFI->isThumb1OnlyFunction() ?
2537 ARM::tGPRRegisterClass : ARM::GPRRegisterClass);
2539 llvm_unreachable("RegVT not supported by FORMAL_ARGUMENTS Lowering");
2541 // Transform the arguments in physical registers into virtual ones.
2542 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2543 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
2546 // If this is an 8 or 16-bit value, it is really passed promoted
2547 // to 32 bits. Insert an assert[sz]ext to capture this, then
2548 // truncate to the right size.
2549 switch (VA.getLocInfo()) {
2550 default: llvm_unreachable("Unknown loc info!");
2551 case CCValAssign::Full: break;
2552 case CCValAssign::BCvt:
2553 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
2555 case CCValAssign::SExt:
2556 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
2557 DAG.getValueType(VA.getValVT()));
2558 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
2560 case CCValAssign::ZExt:
2561 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
2562 DAG.getValueType(VA.getValVT()));
2563 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
2567 InVals.push_back(ArgValue);
2569 } else { // VA.isRegLoc()
2572 assert(VA.isMemLoc());
2573 assert(VA.getValVT() != MVT::i64 && "i64 should already be lowered");
2575 int index = ArgLocs[i].getValNo();
2577 // Some Ins[] entries become multiple ArgLoc[] entries.
2578 // Process them only once.
2579 if (index != lastInsIndex)
2581 ISD::ArgFlagsTy Flags = Ins[index].Flags;
2582 // FIXME: For now, all byval parameter objects are marked mutable.
2583 // This can be changed with more analysis.
2584 // In case of tail call optimization mark all arguments mutable.
2585 // Since they could be overwritten by lowering of arguments in case of
2587 if (Flags.isByVal()) {
2588 unsigned VARegSize, VARegSaveSize;
2589 computeRegArea(CCInfo, MF, VARegSize, VARegSaveSize);
2590 VarArgStyleRegisters(CCInfo, DAG, dl, Chain, 0);
2591 unsigned Bytes = Flags.getByValSize() - VARegSize;
2592 if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
2593 int FI = MFI->CreateFixedObject(Bytes,
2594 VA.getLocMemOffset(), false);
2595 InVals.push_back(DAG.getFrameIndex(FI, getPointerTy()));
2597 int FI = MFI->CreateFixedObject(VA.getLocVT().getSizeInBits()/8,
2598 VA.getLocMemOffset(), true);
2600 // Create load nodes to retrieve arguments from the stack.
2601 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2602 InVals.push_back(DAG.getLoad(VA.getValVT(), dl, Chain, FIN,
2603 MachinePointerInfo::getFixedStack(FI),
2606 lastInsIndex = index;
2613 VarArgStyleRegisters(CCInfo, DAG, dl, Chain, CCInfo.getNextStackOffset());
2618 /// isFloatingPointZero - Return true if this is +0.0.
2619 static bool isFloatingPointZero(SDValue Op) {
2620 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op))
2621 return CFP->getValueAPF().isPosZero();
2622 else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) {
2623 // Maybe this has already been legalized into the constant pool?
2624 if (Op.getOperand(1).getOpcode() == ARMISD::Wrapper) {
2625 SDValue WrapperOp = Op.getOperand(1).getOperand(0);
2626 if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(WrapperOp))
2627 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal()))
2628 return CFP->getValueAPF().isPosZero();
2634 /// Returns appropriate ARM CMP (cmp) and corresponding condition code for
2635 /// the given operands.
2637 ARMTargetLowering::getARMCmp(SDValue LHS, SDValue RHS, ISD::CondCode CC,
2638 SDValue &ARMcc, SelectionDAG &DAG,
2639 DebugLoc dl) const {
2640 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS.getNode())) {
2641 unsigned C = RHSC->getZExtValue();
2642 if (!isLegalICmpImmediate(C)) {
2643 // Constant does not fit, try adjusting it by one?
2648 if (C != 0x80000000 && isLegalICmpImmediate(C-1)) {
2649 CC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGT;
2650 RHS = DAG.getConstant(C-1, MVT::i32);
2655 if (C != 0 && isLegalICmpImmediate(C-1)) {
2656 CC = (CC == ISD::SETULT) ? ISD::SETULE : ISD::SETUGT;
2657 RHS = DAG.getConstant(C-1, MVT::i32);
2662 if (C != 0x7fffffff && isLegalICmpImmediate(C+1)) {
2663 CC = (CC == ISD::SETLE) ? ISD::SETLT : ISD::SETGE;
2664 RHS = DAG.getConstant(C+1, MVT::i32);
2669 if (C != 0xffffffff && isLegalICmpImmediate(C+1)) {
2670 CC = (CC == ISD::SETULE) ? ISD::SETULT : ISD::SETUGE;
2671 RHS = DAG.getConstant(C+1, MVT::i32);
2678 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
2679 ARMISD::NodeType CompareType;
2682 CompareType = ARMISD::CMP;
2687 CompareType = ARMISD::CMPZ;
2690 ARMcc = DAG.getConstant(CondCode, MVT::i32);
2691 return DAG.getNode(CompareType, dl, MVT::Glue, LHS, RHS);
2694 /// Returns a appropriate VFP CMP (fcmp{s|d}+fmstat) for the given operands.
2696 ARMTargetLowering::getVFPCmp(SDValue LHS, SDValue RHS, SelectionDAG &DAG,
2697 DebugLoc dl) const {
2699 if (!isFloatingPointZero(RHS))
2700 Cmp = DAG.getNode(ARMISD::CMPFP, dl, MVT::Glue, LHS, RHS);
2702 Cmp = DAG.getNode(ARMISD::CMPFPw0, dl, MVT::Glue, LHS);
2703 return DAG.getNode(ARMISD::FMSTAT, dl, MVT::Glue, Cmp);
2706 /// duplicateCmp - Glue values can have only one use, so this function
2707 /// duplicates a comparison node.
2709 ARMTargetLowering::duplicateCmp(SDValue Cmp, SelectionDAG &DAG) const {
2710 unsigned Opc = Cmp.getOpcode();
2711 DebugLoc DL = Cmp.getDebugLoc();
2712 if (Opc == ARMISD::CMP || Opc == ARMISD::CMPZ)
2713 return DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1));
2715 assert(Opc == ARMISD::FMSTAT && "unexpected comparison operation");
2716 Cmp = Cmp.getOperand(0);
2717 Opc = Cmp.getOpcode();
2718 if (Opc == ARMISD::CMPFP)
2719 Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1));
2721 assert(Opc == ARMISD::CMPFPw0 && "unexpected operand of FMSTAT");
2722 Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0));
2724 return DAG.getNode(ARMISD::FMSTAT, DL, MVT::Glue, Cmp);
2727 SDValue ARMTargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
2728 SDValue Cond = Op.getOperand(0);
2729 SDValue SelectTrue = Op.getOperand(1);
2730 SDValue SelectFalse = Op.getOperand(2);
2731 DebugLoc dl = Op.getDebugLoc();
2735 // (select (cmov 1, 0, cond), t, f) -> (cmov t, f, cond)
2736 // (select (cmov 0, 1, cond), t, f) -> (cmov f, t, cond)
2738 if (Cond.getOpcode() == ARMISD::CMOV && Cond.hasOneUse()) {
2739 const ConstantSDNode *CMOVTrue =
2740 dyn_cast<ConstantSDNode>(Cond.getOperand(0));
2741 const ConstantSDNode *CMOVFalse =
2742 dyn_cast<ConstantSDNode>(Cond.getOperand(1));
2744 if (CMOVTrue && CMOVFalse) {
2745 unsigned CMOVTrueVal = CMOVTrue->getZExtValue();
2746 unsigned CMOVFalseVal = CMOVFalse->getZExtValue();
2750 if (CMOVTrueVal == 1 && CMOVFalseVal == 0) {
2752 False = SelectFalse;
2753 } else if (CMOVTrueVal == 0 && CMOVFalseVal == 1) {
2758 if (True.getNode() && False.getNode()) {
2759 EVT VT = Op.getValueType();
2760 SDValue ARMcc = Cond.getOperand(2);
2761 SDValue CCR = Cond.getOperand(3);
2762 SDValue Cmp = duplicateCmp(Cond.getOperand(4), DAG);
2763 assert(True.getValueType() == VT);
2764 return DAG.getNode(ARMISD::CMOV, dl, VT, True, False, ARMcc, CCR, Cmp);
2769 return DAG.getSelectCC(dl, Cond,
2770 DAG.getConstant(0, Cond.getValueType()),
2771 SelectTrue, SelectFalse, ISD::SETNE);
2774 SDValue ARMTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
2775 EVT VT = Op.getValueType();
2776 SDValue LHS = Op.getOperand(0);
2777 SDValue RHS = Op.getOperand(1);
2778 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
2779 SDValue TrueVal = Op.getOperand(2);
2780 SDValue FalseVal = Op.getOperand(3);
2781 DebugLoc dl = Op.getDebugLoc();
2783 if (LHS.getValueType() == MVT::i32) {
2785 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2786 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
2787 return DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc, CCR,Cmp);
2790 ARMCC::CondCodes CondCode, CondCode2;
2791 FPCCToARMCC(CC, CondCode, CondCode2);
2793 SDValue ARMcc = DAG.getConstant(CondCode, MVT::i32);
2794 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
2795 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2796 SDValue Result = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal,
2798 if (CondCode2 != ARMCC::AL) {
2799 SDValue ARMcc2 = DAG.getConstant(CondCode2, MVT::i32);
2800 // FIXME: Needs another CMP because flag can have but one use.
2801 SDValue Cmp2 = getVFPCmp(LHS, RHS, DAG, dl);
2802 Result = DAG.getNode(ARMISD::CMOV, dl, VT,
2803 Result, TrueVal, ARMcc2, CCR, Cmp2);
2808 /// canChangeToInt - Given the fp compare operand, return true if it is suitable
2809 /// to morph to an integer compare sequence.
2810 static bool canChangeToInt(SDValue Op, bool &SeenZero,
2811 const ARMSubtarget *Subtarget) {
2812 SDNode *N = Op.getNode();
2813 if (!N->hasOneUse())
2814 // Otherwise it requires moving the value from fp to integer registers.
2816 if (!N->getNumValues())
2818 EVT VT = Op.getValueType();
2819 if (VT != MVT::f32 && !Subtarget->isFPBrccSlow())
2820 // f32 case is generally profitable. f64 case only makes sense when vcmpe +
2821 // vmrs are very slow, e.g. cortex-a8.
2824 if (isFloatingPointZero(Op)) {
2828 return ISD::isNormalLoad(N);
2831 static SDValue bitcastf32Toi32(SDValue Op, SelectionDAG &DAG) {
2832 if (isFloatingPointZero(Op))
2833 return DAG.getConstant(0, MVT::i32);
2835 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op))
2836 return DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2837 Ld->getChain(), Ld->getBasePtr(), Ld->getPointerInfo(),
2838 Ld->isVolatile(), Ld->isNonTemporal(),
2839 Ld->getAlignment());
2841 llvm_unreachable("Unknown VFP cmp argument!");
2844 static void expandf64Toi32(SDValue Op, SelectionDAG &DAG,
2845 SDValue &RetVal1, SDValue &RetVal2) {
2846 if (isFloatingPointZero(Op)) {
2847 RetVal1 = DAG.getConstant(0, MVT::i32);
2848 RetVal2 = DAG.getConstant(0, MVT::i32);
2852 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op)) {
2853 SDValue Ptr = Ld->getBasePtr();
2854 RetVal1 = DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2855 Ld->getChain(), Ptr,
2856 Ld->getPointerInfo(),
2857 Ld->isVolatile(), Ld->isNonTemporal(),
2858 Ld->getAlignment());
2860 EVT PtrType = Ptr.getValueType();
2861 unsigned NewAlign = MinAlign(Ld->getAlignment(), 4);
2862 SDValue NewPtr = DAG.getNode(ISD::ADD, Op.getDebugLoc(),
2863 PtrType, Ptr, DAG.getConstant(4, PtrType));
2864 RetVal2 = DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2865 Ld->getChain(), NewPtr,
2866 Ld->getPointerInfo().getWithOffset(4),
2867 Ld->isVolatile(), Ld->isNonTemporal(),
2872 llvm_unreachable("Unknown VFP cmp argument!");
2875 /// OptimizeVFPBrcond - With -enable-unsafe-fp-math, it's legal to optimize some
2876 /// f32 and even f64 comparisons to integer ones.
2878 ARMTargetLowering::OptimizeVFPBrcond(SDValue Op, SelectionDAG &DAG) const {
2879 SDValue Chain = Op.getOperand(0);
2880 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
2881 SDValue LHS = Op.getOperand(2);
2882 SDValue RHS = Op.getOperand(3);
2883 SDValue Dest = Op.getOperand(4);
2884 DebugLoc dl = Op.getDebugLoc();
2886 bool SeenZero = false;
2887 if (canChangeToInt(LHS, SeenZero, Subtarget) &&
2888 canChangeToInt(RHS, SeenZero, Subtarget) &&
2889 // If one of the operand is zero, it's safe to ignore the NaN case since
2890 // we only care about equality comparisons.
2891 (SeenZero || (DAG.isKnownNeverNaN(LHS) && DAG.isKnownNeverNaN(RHS)))) {
2892 // If unsafe fp math optimization is enabled and there are no other uses of
2893 // the CMP operands, and the condition code is EQ or NE, we can optimize it
2894 // to an integer comparison.
2895 if (CC == ISD::SETOEQ)
2897 else if (CC == ISD::SETUNE)
2901 if (LHS.getValueType() == MVT::f32) {
2902 LHS = bitcastf32Toi32(LHS, DAG);
2903 RHS = bitcastf32Toi32(RHS, DAG);
2904 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
2905 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2906 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
2907 Chain, Dest, ARMcc, CCR, Cmp);
2912 expandf64Toi32(LHS, DAG, LHS1, LHS2);
2913 expandf64Toi32(RHS, DAG, RHS1, RHS2);
2914 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
2915 ARMcc = DAG.getConstant(CondCode, MVT::i32);
2916 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue);
2917 SDValue Ops[] = { Chain, ARMcc, LHS1, LHS2, RHS1, RHS2, Dest };
2918 return DAG.getNode(ARMISD::BCC_i64, dl, VTList, Ops, 7);
2924 SDValue ARMTargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) const {
2925 SDValue Chain = Op.getOperand(0);
2926 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
2927 SDValue LHS = Op.getOperand(2);
2928 SDValue RHS = Op.getOperand(3);
2929 SDValue Dest = Op.getOperand(4);
2930 DebugLoc dl = Op.getDebugLoc();
2932 if (LHS.getValueType() == MVT::i32) {
2934 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
2935 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2936 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
2937 Chain, Dest, ARMcc, CCR, Cmp);
2940 assert(LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64);
2943 (CC == ISD::SETEQ || CC == ISD::SETOEQ ||
2944 CC == ISD::SETNE || CC == ISD::SETUNE)) {
2945 SDValue Result = OptimizeVFPBrcond(Op, DAG);
2946 if (Result.getNode())
2950 ARMCC::CondCodes CondCode, CondCode2;
2951 FPCCToARMCC(CC, CondCode, CondCode2);
2953 SDValue ARMcc = DAG.getConstant(CondCode, MVT::i32);
2954 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
2955 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2956 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue);
2957 SDValue Ops[] = { Chain, Dest, ARMcc, CCR, Cmp };
2958 SDValue Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops, 5);
2959 if (CondCode2 != ARMCC::AL) {
2960 ARMcc = DAG.getConstant(CondCode2, MVT::i32);
2961 SDValue Ops[] = { Res, Dest, ARMcc, CCR, Res.getValue(1) };
2962 Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops, 5);
2967 SDValue ARMTargetLowering::LowerBR_JT(SDValue Op, SelectionDAG &DAG) const {
2968 SDValue Chain = Op.getOperand(0);
2969 SDValue Table = Op.getOperand(1);
2970 SDValue Index = Op.getOperand(2);
2971 DebugLoc dl = Op.getDebugLoc();
2973 EVT PTy = getPointerTy();
2974 JumpTableSDNode *JT = cast<JumpTableSDNode>(Table);
2975 ARMFunctionInfo *AFI = DAG.getMachineFunction().getInfo<ARMFunctionInfo>();
2976 SDValue UId = DAG.getConstant(AFI->createJumpTableUId(), PTy);
2977 SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PTy);
2978 Table = DAG.getNode(ARMISD::WrapperJT, dl, MVT::i32, JTI, UId);
2979 Index = DAG.getNode(ISD::MUL, dl, PTy, Index, DAG.getConstant(4, PTy));
2980 SDValue Addr = DAG.getNode(ISD::ADD, dl, PTy, Index, Table);
2981 if (Subtarget->isThumb2()) {
2982 // Thumb2 uses a two-level jump. That is, it jumps into the jump table
2983 // which does another jump to the destination. This also makes it easier
2984 // to translate it to TBB / TBH later.
2985 // FIXME: This might not work if the function is extremely large.
2986 return DAG.getNode(ARMISD::BR2_JT, dl, MVT::Other, Chain,
2987 Addr, Op.getOperand(2), JTI, UId);
2989 if (getTargetMachine().getRelocationModel() == Reloc::PIC_) {
2990 Addr = DAG.getLoad((EVT)MVT::i32, dl, Chain, Addr,
2991 MachinePointerInfo::getJumpTable(),
2993 Chain = Addr.getValue(1);
2994 Addr = DAG.getNode(ISD::ADD, dl, PTy, Addr, Table);
2995 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
2997 Addr = DAG.getLoad(PTy, dl, Chain, Addr,
2998 MachinePointerInfo::getJumpTable(), false, false, 0);
2999 Chain = Addr.getValue(1);
3000 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
3004 static SDValue LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG) {
3005 DebugLoc dl = Op.getDebugLoc();
3008 switch (Op.getOpcode()) {
3010 assert(0 && "Invalid opcode!");
3011 case ISD::FP_TO_SINT:
3012 Opc = ARMISD::FTOSI;
3014 case ISD::FP_TO_UINT:
3015 Opc = ARMISD::FTOUI;
3018 Op = DAG.getNode(Opc, dl, MVT::f32, Op.getOperand(0));
3019 return DAG.getNode(ISD::BITCAST, dl, MVT::i32, Op);
3022 static SDValue LowerVectorINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
3023 EVT VT = Op.getValueType();
3024 DebugLoc dl = Op.getDebugLoc();
3026 assert(Op.getOperand(0).getValueType() == MVT::v4i16 &&
3027 "Invalid type for custom lowering!");
3028 if (VT != MVT::v4f32)
3029 return DAG.UnrollVectorOp(Op.getNode());
3033 switch (Op.getOpcode()) {
3035 assert(0 && "Invalid opcode!");
3036 case ISD::SINT_TO_FP:
3037 CastOpc = ISD::SIGN_EXTEND;
3038 Opc = ISD::SINT_TO_FP;
3040 case ISD::UINT_TO_FP:
3041 CastOpc = ISD::ZERO_EXTEND;
3042 Opc = ISD::UINT_TO_FP;
3046 Op = DAG.getNode(CastOpc, dl, MVT::v4i32, Op.getOperand(0));
3047 return DAG.getNode(Opc, dl, VT, Op);
3050 static SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
3051 EVT VT = Op.getValueType();
3053 return LowerVectorINT_TO_FP(Op, DAG);
3055 DebugLoc dl = Op.getDebugLoc();
3058 switch (Op.getOpcode()) {
3060 assert(0 && "Invalid opcode!");
3061 case ISD::SINT_TO_FP:
3062 Opc = ARMISD::SITOF;
3064 case ISD::UINT_TO_FP:
3065 Opc = ARMISD::UITOF;
3069 Op = DAG.getNode(ISD::BITCAST, dl, MVT::f32, Op.getOperand(0));
3070 return DAG.getNode(Opc, dl, VT, Op);
3073 SDValue ARMTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
3074 // Implement fcopysign with a fabs and a conditional fneg.
3075 SDValue Tmp0 = Op.getOperand(0);
3076 SDValue Tmp1 = Op.getOperand(1);
3077 DebugLoc dl = Op.getDebugLoc();
3078 EVT VT = Op.getValueType();
3079 EVT SrcVT = Tmp1.getValueType();
3080 bool InGPR = Tmp0.getOpcode() == ISD::BITCAST ||
3081 Tmp0.getOpcode() == ARMISD::VMOVDRR;
3082 bool UseNEON = !InGPR && Subtarget->hasNEON();
3085 // Use VBSL to copy the sign bit.
3086 unsigned EncodedVal = ARM_AM::createNEONModImm(0x6, 0x80);
3087 SDValue Mask = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v2i32,
3088 DAG.getTargetConstant(EncodedVal, MVT::i32));
3089 EVT OpVT = (VT == MVT::f32) ? MVT::v2i32 : MVT::v1i64;
3091 Mask = DAG.getNode(ARMISD::VSHL, dl, OpVT,
3092 DAG.getNode(ISD::BITCAST, dl, OpVT, Mask),
3093 DAG.getConstant(32, MVT::i32));
3094 else /*if (VT == MVT::f32)*/
3095 Tmp0 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp0);
3096 if (SrcVT == MVT::f32) {
3097 Tmp1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp1);
3099 Tmp1 = DAG.getNode(ARMISD::VSHL, dl, OpVT,
3100 DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1),
3101 DAG.getConstant(32, MVT::i32));
3102 } else if (VT == MVT::f32)
3103 Tmp1 = DAG.getNode(ARMISD::VSHRu, dl, MVT::v1i64,
3104 DAG.getNode(ISD::BITCAST, dl, MVT::v1i64, Tmp1),
3105 DAG.getConstant(32, MVT::i32));
3106 Tmp0 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp0);
3107 Tmp1 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1);
3109 SDValue AllOnes = DAG.getTargetConstant(ARM_AM::createNEONModImm(0xe, 0xff),
3111 AllOnes = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v8i8, AllOnes);
3112 SDValue MaskNot = DAG.getNode(ISD::XOR, dl, OpVT, Mask,
3113 DAG.getNode(ISD::BITCAST, dl, OpVT, AllOnes));
3115 SDValue Res = DAG.getNode(ISD::OR, dl, OpVT,
3116 DAG.getNode(ISD::AND, dl, OpVT, Tmp1, Mask),
3117 DAG.getNode(ISD::AND, dl, OpVT, Tmp0, MaskNot));
3118 if (VT == MVT::f32) {
3119 Res = DAG.getNode(ISD::BITCAST, dl, MVT::v2f32, Res);
3120 Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, Res,
3121 DAG.getConstant(0, MVT::i32));
3123 Res = DAG.getNode(ISD::BITCAST, dl, MVT::f64, Res);
3129 // Bitcast operand 1 to i32.
3130 if (SrcVT == MVT::f64)
3131 Tmp1 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32),
3132 &Tmp1, 1).getValue(1);
3133 Tmp1 = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp1);
3135 // Or in the signbit with integer operations.
3136 SDValue Mask1 = DAG.getConstant(0x80000000, MVT::i32);
3137 SDValue Mask2 = DAG.getConstant(0x7fffffff, MVT::i32);
3138 Tmp1 = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp1, Mask1);
3139 if (VT == MVT::f32) {
3140 Tmp0 = DAG.getNode(ISD::AND, dl, MVT::i32,
3141 DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp0), Mask2);
3142 return DAG.getNode(ISD::BITCAST, dl, MVT::f32,
3143 DAG.getNode(ISD::OR, dl, MVT::i32, Tmp0, Tmp1));
3146 // f64: Or the high part with signbit and then combine two parts.
3147 Tmp0 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32),
3149 SDValue Lo = Tmp0.getValue(0);
3150 SDValue Hi = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp0.getValue(1), Mask2);
3151 Hi = DAG.getNode(ISD::OR, dl, MVT::i32, Hi, Tmp1);
3152 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
3155 SDValue ARMTargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const{
3156 MachineFunction &MF = DAG.getMachineFunction();
3157 MachineFrameInfo *MFI = MF.getFrameInfo();
3158 MFI->setReturnAddressIsTaken(true);
3160 EVT VT = Op.getValueType();
3161 DebugLoc dl = Op.getDebugLoc();
3162 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
3164 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
3165 SDValue Offset = DAG.getConstant(4, MVT::i32);
3166 return DAG.getLoad(VT, dl, DAG.getEntryNode(),
3167 DAG.getNode(ISD::ADD, dl, VT, FrameAddr, Offset),
3168 MachinePointerInfo(), false, false, 0);
3171 // Return LR, which contains the return address. Mark it an implicit live-in.
3172 unsigned Reg = MF.addLiveIn(ARM::LR, getRegClassFor(MVT::i32));
3173 return DAG.getCopyFromReg(DAG.getEntryNode(), dl, Reg, VT);
3176 SDValue ARMTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
3177 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
3178 MFI->setFrameAddressIsTaken(true);
3180 EVT VT = Op.getValueType();
3181 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
3182 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
3183 unsigned FrameReg = (Subtarget->isThumb() || Subtarget->isTargetDarwin())
3184 ? ARM::R7 : ARM::R11;
3185 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
3187 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
3188 MachinePointerInfo(),
3193 /// ExpandBITCAST - If the target supports VFP, this function is called to
3194 /// expand a bit convert where either the source or destination type is i64 to
3195 /// use a VMOVDRR or VMOVRRD node. This should not be done when the non-i64
3196 /// operand type is illegal (e.g., v2f32 for a target that doesn't support
3197 /// vectors), since the legalizer won't know what to do with that.
3198 static SDValue ExpandBITCAST(SDNode *N, SelectionDAG &DAG) {
3199 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
3200 DebugLoc dl = N->getDebugLoc();
3201 SDValue Op = N->getOperand(0);
3203 // This function is only supposed to be called for i64 types, either as the
3204 // source or destination of the bit convert.
3205 EVT SrcVT = Op.getValueType();
3206 EVT DstVT = N->getValueType(0);
3207 assert((SrcVT == MVT::i64 || DstVT == MVT::i64) &&
3208 "ExpandBITCAST called for non-i64 type");
3210 // Turn i64->f64 into VMOVDRR.
3211 if (SrcVT == MVT::i64 && TLI.isTypeLegal(DstVT)) {
3212 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
3213 DAG.getConstant(0, MVT::i32));
3214 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
3215 DAG.getConstant(1, MVT::i32));
3216 return DAG.getNode(ISD::BITCAST, dl, DstVT,
3217 DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi));
3220 // Turn f64->i64 into VMOVRRD.
3221 if (DstVT == MVT::i64 && TLI.isTypeLegal(SrcVT)) {
3222 SDValue Cvt = DAG.getNode(ARMISD::VMOVRRD, dl,
3223 DAG.getVTList(MVT::i32, MVT::i32), &Op, 1);
3224 // Merge the pieces into a single i64 value.
3225 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Cvt, Cvt.getValue(1));
3231 /// getZeroVector - Returns a vector of specified type with all zero elements.
3232 /// Zero vectors are used to represent vector negation and in those cases
3233 /// will be implemented with the NEON VNEG instruction. However, VNEG does
3234 /// not support i64 elements, so sometimes the zero vectors will need to be
3235 /// explicitly constructed. Regardless, use a canonical VMOV to create the
3237 static SDValue getZeroVector(EVT VT, SelectionDAG &DAG, DebugLoc dl) {
3238 assert(VT.isVector() && "Expected a vector type");
3239 // The canonical modified immediate encoding of a zero vector is....0!
3240 SDValue EncodedVal = DAG.getTargetConstant(0, MVT::i32);
3241 EVT VmovVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32;
3242 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, EncodedVal);
3243 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
3246 /// LowerShiftRightParts - Lower SRA_PARTS, which returns two
3247 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
3248 SDValue ARMTargetLowering::LowerShiftRightParts(SDValue Op,
3249 SelectionDAG &DAG) const {
3250 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
3251 EVT VT = Op.getValueType();
3252 unsigned VTBits = VT.getSizeInBits();
3253 DebugLoc dl = Op.getDebugLoc();
3254 SDValue ShOpLo = Op.getOperand(0);
3255 SDValue ShOpHi = Op.getOperand(1);
3256 SDValue ShAmt = Op.getOperand(2);
3258 unsigned Opc = (Op.getOpcode() == ISD::SRA_PARTS) ? ISD::SRA : ISD::SRL;
3260 assert(Op.getOpcode() == ISD::SRA_PARTS || Op.getOpcode() == ISD::SRL_PARTS);
3262 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
3263 DAG.getConstant(VTBits, MVT::i32), ShAmt);
3264 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, ShAmt);
3265 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
3266 DAG.getConstant(VTBits, MVT::i32));
3267 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, RevShAmt);
3268 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
3269 SDValue TrueVal = DAG.getNode(Opc, dl, VT, ShOpHi, ExtraShAmt);
3271 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3272 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
3274 SDValue Hi = DAG.getNode(Opc, dl, VT, ShOpHi, ShAmt);
3275 SDValue Lo = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc,
3278 SDValue Ops[2] = { Lo, Hi };
3279 return DAG.getMergeValues(Ops, 2, dl);
3282 /// LowerShiftLeftParts - Lower SHL_PARTS, which returns two
3283 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
3284 SDValue ARMTargetLowering::LowerShiftLeftParts(SDValue Op,
3285 SelectionDAG &DAG) const {
3286 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
3287 EVT VT = Op.getValueType();
3288 unsigned VTBits = VT.getSizeInBits();
3289 DebugLoc dl = Op.getDebugLoc();
3290 SDValue ShOpLo = Op.getOperand(0);
3291 SDValue ShOpHi = Op.getOperand(1);
3292 SDValue ShAmt = Op.getOperand(2);
3295 assert(Op.getOpcode() == ISD::SHL_PARTS);
3296 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
3297 DAG.getConstant(VTBits, MVT::i32), ShAmt);
3298 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, RevShAmt);
3299 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
3300 DAG.getConstant(VTBits, MVT::i32));
3301 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, ShAmt);
3302 SDValue Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ExtraShAmt);
3304 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
3305 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3306 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
3308 SDValue Lo = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
3309 SDValue Hi = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, Tmp3, ARMcc,
3312 SDValue Ops[2] = { Lo, Hi };
3313 return DAG.getMergeValues(Ops, 2, dl);
3316 SDValue ARMTargetLowering::LowerFLT_ROUNDS_(SDValue Op,
3317 SelectionDAG &DAG) const {
3318 // The rounding mode is in bits 23:22 of the FPSCR.
3319 // The ARM rounding mode value to FLT_ROUNDS mapping is 0->1, 1->2, 2->3, 3->0
3320 // The formula we use to implement this is (((FPSCR + 1 << 22) >> 22) & 3)
3321 // so that the shift + and get folded into a bitfield extract.
3322 DebugLoc dl = Op.getDebugLoc();
3323 SDValue FPSCR = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::i32,
3324 DAG.getConstant(Intrinsic::arm_get_fpscr,
3326 SDValue FltRounds = DAG.getNode(ISD::ADD, dl, MVT::i32, FPSCR,
3327 DAG.getConstant(1U << 22, MVT::i32));
3328 SDValue RMODE = DAG.getNode(ISD::SRL, dl, MVT::i32, FltRounds,
3329 DAG.getConstant(22, MVT::i32));
3330 return DAG.getNode(ISD::AND, dl, MVT::i32, RMODE,
3331 DAG.getConstant(3, MVT::i32));
3334 static SDValue LowerCTTZ(SDNode *N, SelectionDAG &DAG,
3335 const ARMSubtarget *ST) {
3336 EVT VT = N->getValueType(0);
3337 DebugLoc dl = N->getDebugLoc();
3339 if (!ST->hasV6T2Ops())
3342 SDValue rbit = DAG.getNode(ARMISD::RBIT, dl, VT, N->getOperand(0));
3343 return DAG.getNode(ISD::CTLZ, dl, VT, rbit);
3346 static SDValue LowerShift(SDNode *N, SelectionDAG &DAG,
3347 const ARMSubtarget *ST) {
3348 EVT VT = N->getValueType(0);
3349 DebugLoc dl = N->getDebugLoc();
3354 // Lower vector shifts on NEON to use VSHL.
3355 assert(ST->hasNEON() && "unexpected vector shift");
3357 // Left shifts translate directly to the vshiftu intrinsic.
3358 if (N->getOpcode() == ISD::SHL)
3359 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
3360 DAG.getConstant(Intrinsic::arm_neon_vshiftu, MVT::i32),
3361 N->getOperand(0), N->getOperand(1));
3363 assert((N->getOpcode() == ISD::SRA ||
3364 N->getOpcode() == ISD::SRL) && "unexpected vector shift opcode");
3366 // NEON uses the same intrinsics for both left and right shifts. For
3367 // right shifts, the shift amounts are negative, so negate the vector of
3369 EVT ShiftVT = N->getOperand(1).getValueType();
3370 SDValue NegatedCount = DAG.getNode(ISD::SUB, dl, ShiftVT,
3371 getZeroVector(ShiftVT, DAG, dl),
3373 Intrinsic::ID vshiftInt = (N->getOpcode() == ISD::SRA ?
3374 Intrinsic::arm_neon_vshifts :
3375 Intrinsic::arm_neon_vshiftu);
3376 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
3377 DAG.getConstant(vshiftInt, MVT::i32),
3378 N->getOperand(0), NegatedCount);
3381 static SDValue Expand64BitShift(SDNode *N, SelectionDAG &DAG,
3382 const ARMSubtarget *ST) {
3383 EVT VT = N->getValueType(0);
3384 DebugLoc dl = N->getDebugLoc();
3386 // We can get here for a node like i32 = ISD::SHL i32, i64
3390 assert((N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA) &&
3391 "Unknown shift to lower!");
3393 // We only lower SRA, SRL of 1 here, all others use generic lowering.
3394 if (!isa<ConstantSDNode>(N->getOperand(1)) ||
3395 cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() != 1)
3398 // If we are in thumb mode, we don't have RRX.
3399 if (ST->isThumb1Only()) return SDValue();
3401 // Okay, we have a 64-bit SRA or SRL of 1. Lower this to an RRX expr.
3402 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
3403 DAG.getConstant(0, MVT::i32));
3404 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
3405 DAG.getConstant(1, MVT::i32));
3407 // First, build a SRA_FLAG/SRL_FLAG op, which shifts the top part by one and
3408 // captures the result into a carry flag.
3409 unsigned Opc = N->getOpcode() == ISD::SRL ? ARMISD::SRL_FLAG:ARMISD::SRA_FLAG;
3410 Hi = DAG.getNode(Opc, dl, DAG.getVTList(MVT::i32, MVT::Glue), &Hi, 1);
3412 // The low part is an ARMISD::RRX operand, which shifts the carry in.
3413 Lo = DAG.getNode(ARMISD::RRX, dl, MVT::i32, Lo, Hi.getValue(1));
3415 // Merge the pieces into a single i64 value.
3416 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi);
3419 static SDValue LowerVSETCC(SDValue Op, SelectionDAG &DAG) {
3420 SDValue TmpOp0, TmpOp1;
3421 bool Invert = false;
3425 SDValue Op0 = Op.getOperand(0);
3426 SDValue Op1 = Op.getOperand(1);
3427 SDValue CC = Op.getOperand(2);
3428 EVT VT = Op.getValueType();
3429 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
3430 DebugLoc dl = Op.getDebugLoc();
3432 if (Op.getOperand(1).getValueType().isFloatingPoint()) {
3433 switch (SetCCOpcode) {
3434 default: llvm_unreachable("Illegal FP comparison"); break;
3436 case ISD::SETNE: Invert = true; // Fallthrough
3438 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
3440 case ISD::SETLT: Swap = true; // Fallthrough
3442 case ISD::SETGT: Opc = ARMISD::VCGT; break;
3444 case ISD::SETLE: Swap = true; // Fallthrough
3446 case ISD::SETGE: Opc = ARMISD::VCGE; break;
3447 case ISD::SETUGE: Swap = true; // Fallthrough
3448 case ISD::SETULE: Invert = true; Opc = ARMISD::VCGT; break;
3449 case ISD::SETUGT: Swap = true; // Fallthrough
3450 case ISD::SETULT: Invert = true; Opc = ARMISD::VCGE; break;
3451 case ISD::SETUEQ: Invert = true; // Fallthrough
3453 // Expand this to (OLT | OGT).
3457 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
3458 Op1 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp0, TmpOp1);
3460 case ISD::SETUO: Invert = true; // Fallthrough
3462 // Expand this to (OLT | OGE).
3466 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
3467 Op1 = DAG.getNode(ARMISD::VCGE, dl, VT, TmpOp0, TmpOp1);
3471 // Integer comparisons.
3472 switch (SetCCOpcode) {
3473 default: llvm_unreachable("Illegal integer comparison"); break;
3474 case ISD::SETNE: Invert = true;
3475 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
3476 case ISD::SETLT: Swap = true;
3477 case ISD::SETGT: Opc = ARMISD::VCGT; break;
3478 case ISD::SETLE: Swap = true;
3479 case ISD::SETGE: Opc = ARMISD::VCGE; break;
3480 case ISD::SETULT: Swap = true;
3481 case ISD::SETUGT: Opc = ARMISD::VCGTU; break;
3482 case ISD::SETULE: Swap = true;
3483 case ISD::SETUGE: Opc = ARMISD::VCGEU; break;
3486 // Detect VTST (Vector Test Bits) = icmp ne (and (op0, op1), zero).
3487 if (Opc == ARMISD::VCEQ) {
3490 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
3492 else if (ISD::isBuildVectorAllZeros(Op0.getNode()))
3495 // Ignore bitconvert.
3496 if (AndOp.getNode() && AndOp.getOpcode() == ISD::BITCAST)
3497 AndOp = AndOp.getOperand(0);
3499 if (AndOp.getNode() && AndOp.getOpcode() == ISD::AND) {
3501 Op0 = DAG.getNode(ISD::BITCAST, dl, VT, AndOp.getOperand(0));
3502 Op1 = DAG.getNode(ISD::BITCAST, dl, VT, AndOp.getOperand(1));
3509 std::swap(Op0, Op1);
3511 // If one of the operands is a constant vector zero, attempt to fold the
3512 // comparison to a specialized compare-against-zero form.
3514 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
3516 else if (ISD::isBuildVectorAllZeros(Op0.getNode())) {
3517 if (Opc == ARMISD::VCGE)
3518 Opc = ARMISD::VCLEZ;
3519 else if (Opc == ARMISD::VCGT)
3520 Opc = ARMISD::VCLTZ;
3525 if (SingleOp.getNode()) {
3528 Result = DAG.getNode(ARMISD::VCEQZ, dl, VT, SingleOp); break;
3530 Result = DAG.getNode(ARMISD::VCGEZ, dl, VT, SingleOp); break;
3532 Result = DAG.getNode(ARMISD::VCLEZ, dl, VT, SingleOp); break;
3534 Result = DAG.getNode(ARMISD::VCGTZ, dl, VT, SingleOp); break;
3536 Result = DAG.getNode(ARMISD::VCLTZ, dl, VT, SingleOp); break;
3538 Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
3541 Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
3545 Result = DAG.getNOT(dl, Result, VT);
3550 /// isNEONModifiedImm - Check if the specified splat value corresponds to a
3551 /// valid vector constant for a NEON instruction with a "modified immediate"
3552 /// operand (e.g., VMOV). If so, return the encoded value.
3553 static SDValue isNEONModifiedImm(uint64_t SplatBits, uint64_t SplatUndef,
3554 unsigned SplatBitSize, SelectionDAG &DAG,
3555 EVT &VT, bool is128Bits, NEONModImmType type) {
3556 unsigned OpCmode, Imm;
3558 // SplatBitSize is set to the smallest size that splats the vector, so a
3559 // zero vector will always have SplatBitSize == 8. However, NEON modified
3560 // immediate instructions others than VMOV do not support the 8-bit encoding
3561 // of a zero vector, and the default encoding of zero is supposed to be the
3566 switch (SplatBitSize) {
3568 if (type != VMOVModImm)
3570 // Any 1-byte value is OK. Op=0, Cmode=1110.
3571 assert((SplatBits & ~0xff) == 0 && "one byte splat value is too big");
3574 VT = is128Bits ? MVT::v16i8 : MVT::v8i8;
3578 // NEON's 16-bit VMOV supports splat values where only one byte is nonzero.
3579 VT = is128Bits ? MVT::v8i16 : MVT::v4i16;
3580 if ((SplatBits & ~0xff) == 0) {
3581 // Value = 0x00nn: Op=x, Cmode=100x.
3586 if ((SplatBits & ~0xff00) == 0) {
3587 // Value = 0xnn00: Op=x, Cmode=101x.
3589 Imm = SplatBits >> 8;
3595 // NEON's 32-bit VMOV supports splat values where:
3596 // * only one byte is nonzero, or
3597 // * the least significant byte is 0xff and the second byte is nonzero, or
3598 // * the least significant 2 bytes are 0xff and the third is nonzero.
3599 VT = is128Bits ? MVT::v4i32 : MVT::v2i32;
3600 if ((SplatBits & ~0xff) == 0) {
3601 // Value = 0x000000nn: Op=x, Cmode=000x.
3606 if ((SplatBits & ~0xff00) == 0) {
3607 // Value = 0x0000nn00: Op=x, Cmode=001x.
3609 Imm = SplatBits >> 8;
3612 if ((SplatBits & ~0xff0000) == 0) {
3613 // Value = 0x00nn0000: Op=x, Cmode=010x.
3615 Imm = SplatBits >> 16;
3618 if ((SplatBits & ~0xff000000) == 0) {
3619 // Value = 0xnn000000: Op=x, Cmode=011x.
3621 Imm = SplatBits >> 24;
3625 // cmode == 0b1100 and cmode == 0b1101 are not supported for VORR or VBIC
3626 if (type == OtherModImm) return SDValue();
3628 if ((SplatBits & ~0xffff) == 0 &&
3629 ((SplatBits | SplatUndef) & 0xff) == 0xff) {
3630 // Value = 0x0000nnff: Op=x, Cmode=1100.
3632 Imm = SplatBits >> 8;
3637 if ((SplatBits & ~0xffffff) == 0 &&
3638 ((SplatBits | SplatUndef) & 0xffff) == 0xffff) {
3639 // Value = 0x00nnffff: Op=x, Cmode=1101.
3641 Imm = SplatBits >> 16;
3642 SplatBits |= 0xffff;
3646 // Note: there are a few 32-bit splat values (specifically: 00ffff00,
3647 // ff000000, ff0000ff, and ffff00ff) that are valid for VMOV.I64 but not
3648 // VMOV.I32. A (very) minor optimization would be to replicate the value
3649 // and fall through here to test for a valid 64-bit splat. But, then the
3650 // caller would also need to check and handle the change in size.
3654 if (type != VMOVModImm)
3656 // NEON has a 64-bit VMOV splat where each byte is either 0 or 0xff.
3657 uint64_t BitMask = 0xff;
3659 unsigned ImmMask = 1;
3661 for (int ByteNum = 0; ByteNum < 8; ++ByteNum) {
3662 if (((SplatBits | SplatUndef) & BitMask) == BitMask) {
3665 } else if ((SplatBits & BitMask) != 0) {
3671 // Op=1, Cmode=1110.
3674 VT = is128Bits ? MVT::v2i64 : MVT::v1i64;
3679 llvm_unreachable("unexpected size for isNEONModifiedImm");
3683 unsigned EncodedVal = ARM_AM::createNEONModImm(OpCmode, Imm);
3684 return DAG.getTargetConstant(EncodedVal, MVT::i32);
3687 static bool isVEXTMask(const SmallVectorImpl<int> &M, EVT VT,
3688 bool &ReverseVEXT, unsigned &Imm) {
3689 unsigned NumElts = VT.getVectorNumElements();
3690 ReverseVEXT = false;
3692 // Assume that the first shuffle index is not UNDEF. Fail if it is.
3698 // If this is a VEXT shuffle, the immediate value is the index of the first
3699 // element. The other shuffle indices must be the successive elements after
3701 unsigned ExpectedElt = Imm;
3702 for (unsigned i = 1; i < NumElts; ++i) {
3703 // Increment the expected index. If it wraps around, it may still be
3704 // a VEXT but the source vectors must be swapped.
3706 if (ExpectedElt == NumElts * 2) {
3711 if (M[i] < 0) continue; // ignore UNDEF indices
3712 if (ExpectedElt != static_cast<unsigned>(M[i]))
3716 // Adjust the index value if the source operands will be swapped.
3723 /// isVREVMask - Check if a vector shuffle corresponds to a VREV
3724 /// instruction with the specified blocksize. (The order of the elements
3725 /// within each block of the vector is reversed.)
3726 static bool isVREVMask(const SmallVectorImpl<int> &M, EVT VT,
3727 unsigned BlockSize) {
3728 assert((BlockSize==16 || BlockSize==32 || BlockSize==64) &&
3729 "Only possible block sizes for VREV are: 16, 32, 64");
3731 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3735 unsigned NumElts = VT.getVectorNumElements();
3736 unsigned BlockElts = M[0] + 1;
3737 // If the first shuffle index is UNDEF, be optimistic.
3739 BlockElts = BlockSize / EltSz;
3741 if (BlockSize <= EltSz || BlockSize != BlockElts * EltSz)
3744 for (unsigned i = 0; i < NumElts; ++i) {
3745 if (M[i] < 0) continue; // ignore UNDEF indices
3746 if ((unsigned) M[i] != (i - i%BlockElts) + (BlockElts - 1 - i%BlockElts))
3753 static bool isVTBLMask(const SmallVectorImpl<int> &M, EVT VT) {
3754 // We can handle <8 x i8> vector shuffles. If the index in the mask is out of
3755 // range, then 0 is placed into the resulting vector. So pretty much any mask
3756 // of 8 elements can work here.
3757 return VT == MVT::v8i8 && M.size() == 8;
3760 static bool isVTRNMask(const SmallVectorImpl<int> &M, EVT VT,
3761 unsigned &WhichResult) {
3762 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3766 unsigned NumElts = VT.getVectorNumElements();
3767 WhichResult = (M[0] == 0 ? 0 : 1);
3768 for (unsigned i = 0; i < NumElts; i += 2) {
3769 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
3770 (M[i+1] >= 0 && (unsigned) M[i+1] != i + NumElts + WhichResult))
3776 /// isVTRN_v_undef_Mask - Special case of isVTRNMask for canonical form of
3777 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
3778 /// Mask is e.g., <0, 0, 2, 2> instead of <0, 4, 2, 6>.
3779 static bool isVTRN_v_undef_Mask(const SmallVectorImpl<int> &M, EVT VT,
3780 unsigned &WhichResult) {
3781 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3785 unsigned NumElts = VT.getVectorNumElements();
3786 WhichResult = (M[0] == 0 ? 0 : 1);
3787 for (unsigned i = 0; i < NumElts; i += 2) {
3788 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
3789 (M[i+1] >= 0 && (unsigned) M[i+1] != i + WhichResult))
3795 static bool isVUZPMask(const SmallVectorImpl<int> &M, EVT VT,
3796 unsigned &WhichResult) {
3797 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3801 unsigned NumElts = VT.getVectorNumElements();
3802 WhichResult = (M[0] == 0 ? 0 : 1);
3803 for (unsigned i = 0; i != NumElts; ++i) {
3804 if (M[i] < 0) continue; // ignore UNDEF indices
3805 if ((unsigned) M[i] != 2 * i + WhichResult)
3809 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3810 if (VT.is64BitVector() && EltSz == 32)
3816 /// isVUZP_v_undef_Mask - Special case of isVUZPMask for canonical form of
3817 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
3818 /// Mask is e.g., <0, 2, 0, 2> instead of <0, 2, 4, 6>,
3819 static bool isVUZP_v_undef_Mask(const SmallVectorImpl<int> &M, EVT VT,
3820 unsigned &WhichResult) {
3821 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3825 unsigned Half = VT.getVectorNumElements() / 2;
3826 WhichResult = (M[0] == 0 ? 0 : 1);
3827 for (unsigned j = 0; j != 2; ++j) {
3828 unsigned Idx = WhichResult;
3829 for (unsigned i = 0; i != Half; ++i) {
3830 int MIdx = M[i + j * Half];
3831 if (MIdx >= 0 && (unsigned) MIdx != Idx)
3837 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3838 if (VT.is64BitVector() && EltSz == 32)
3844 static bool isVZIPMask(const SmallVectorImpl<int> &M, EVT VT,
3845 unsigned &WhichResult) {
3846 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3850 unsigned NumElts = VT.getVectorNumElements();
3851 WhichResult = (M[0] == 0 ? 0 : 1);
3852 unsigned Idx = WhichResult * NumElts / 2;
3853 for (unsigned i = 0; i != NumElts; i += 2) {
3854 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
3855 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx + NumElts))
3860 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3861 if (VT.is64BitVector() && EltSz == 32)
3867 /// isVZIP_v_undef_Mask - Special case of isVZIPMask for canonical form of
3868 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
3869 /// Mask is e.g., <0, 0, 1, 1> instead of <0, 4, 1, 5>.
3870 static bool isVZIP_v_undef_Mask(const SmallVectorImpl<int> &M, EVT VT,
3871 unsigned &WhichResult) {
3872 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3876 unsigned NumElts = VT.getVectorNumElements();
3877 WhichResult = (M[0] == 0 ? 0 : 1);
3878 unsigned Idx = WhichResult * NumElts / 2;
3879 for (unsigned i = 0; i != NumElts; i += 2) {
3880 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
3881 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx))
3886 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3887 if (VT.is64BitVector() && EltSz == 32)
3893 // If N is an integer constant that can be moved into a register in one
3894 // instruction, return an SDValue of such a constant (will become a MOV
3895 // instruction). Otherwise return null.
3896 static SDValue IsSingleInstrConstant(SDValue N, SelectionDAG &DAG,
3897 const ARMSubtarget *ST, DebugLoc dl) {
3899 if (!isa<ConstantSDNode>(N))
3901 Val = cast<ConstantSDNode>(N)->getZExtValue();
3903 if (ST->isThumb1Only()) {
3904 if (Val <= 255 || ~Val <= 255)
3905 return DAG.getConstant(Val, MVT::i32);
3907 if (ARM_AM::getSOImmVal(Val) != -1 || ARM_AM::getSOImmVal(~Val) != -1)
3908 return DAG.getConstant(Val, MVT::i32);
3913 // If this is a case we can't handle, return null and let the default
3914 // expansion code take care of it.
3915 SDValue ARMTargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG,
3916 const ARMSubtarget *ST) const {
3917 BuildVectorSDNode *BVN = cast<BuildVectorSDNode>(Op.getNode());
3918 DebugLoc dl = Op.getDebugLoc();
3919 EVT VT = Op.getValueType();
3921 APInt SplatBits, SplatUndef;
3922 unsigned SplatBitSize;
3924 if (BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
3925 if (SplatBitSize <= 64) {
3926 // Check if an immediate VMOV works.
3928 SDValue Val = isNEONModifiedImm(SplatBits.getZExtValue(),
3929 SplatUndef.getZExtValue(), SplatBitSize,
3930 DAG, VmovVT, VT.is128BitVector(),
3932 if (Val.getNode()) {
3933 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, Val);
3934 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
3937 // Try an immediate VMVN.
3938 uint64_t NegatedImm = (SplatBits.getZExtValue() ^
3939 ((1LL << SplatBitSize) - 1));
3940 Val = isNEONModifiedImm(NegatedImm,
3941 SplatUndef.getZExtValue(), SplatBitSize,
3942 DAG, VmovVT, VT.is128BitVector(),
3944 if (Val.getNode()) {
3945 SDValue Vmov = DAG.getNode(ARMISD::VMVNIMM, dl, VmovVT, Val);
3946 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
3951 // Scan through the operands to see if only one value is used.
3952 unsigned NumElts = VT.getVectorNumElements();
3953 bool isOnlyLowElement = true;
3954 bool usesOnlyOneValue = true;
3955 bool isConstant = true;
3957 for (unsigned i = 0; i < NumElts; ++i) {
3958 SDValue V = Op.getOperand(i);
3959 if (V.getOpcode() == ISD::UNDEF)
3962 isOnlyLowElement = false;
3963 if (!isa<ConstantFPSDNode>(V) && !isa<ConstantSDNode>(V))
3966 if (!Value.getNode())
3968 else if (V != Value)
3969 usesOnlyOneValue = false;
3972 if (!Value.getNode())
3973 return DAG.getUNDEF(VT);
3975 if (isOnlyLowElement)
3976 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Value);
3978 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
3980 // Use VDUP for non-constant splats. For f32 constant splats, reduce to
3981 // i32 and try again.
3982 if (usesOnlyOneValue && EltSize <= 32) {
3984 return DAG.getNode(ARMISD::VDUP, dl, VT, Value);
3985 if (VT.getVectorElementType().isFloatingPoint()) {
3986 SmallVector<SDValue, 8> Ops;
3987 for (unsigned i = 0; i < NumElts; ++i)
3988 Ops.push_back(DAG.getNode(ISD::BITCAST, dl, MVT::i32,
3990 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, NumElts);
3991 SDValue Val = DAG.getNode(ISD::BUILD_VECTOR, dl, VecVT, &Ops[0], NumElts);
3992 Val = LowerBUILD_VECTOR(Val, DAG, ST);
3994 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
3996 SDValue Val = IsSingleInstrConstant(Value, DAG, ST, dl);
3998 return DAG.getNode(ARMISD::VDUP, dl, VT, Val);
4001 // If all elements are constants and the case above didn't get hit, fall back
4002 // to the default expansion, which will generate a load from the constant
4007 // Empirical tests suggest this is rarely worth it for vectors of length <= 2.
4009 SDValue shuffle = ReconstructShuffle(Op, DAG);
4010 if (shuffle != SDValue())
4014 // Vectors with 32- or 64-bit elements can be built by directly assigning
4015 // the subregisters. Lower it to an ARMISD::BUILD_VECTOR so the operands
4016 // will be legalized.
4017 if (EltSize >= 32) {
4018 // Do the expansion with floating-point types, since that is what the VFP
4019 // registers are defined to use, and since i64 is not legal.
4020 EVT EltVT = EVT::getFloatingPointVT(EltSize);
4021 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
4022 SmallVector<SDValue, 8> Ops;
4023 for (unsigned i = 0; i < NumElts; ++i)
4024 Ops.push_back(DAG.getNode(ISD::BITCAST, dl, EltVT, Op.getOperand(i)));
4025 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, &Ops[0],NumElts);
4026 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
4032 // Gather data to see if the operation can be modelled as a
4033 // shuffle in combination with VEXTs.
4034 SDValue ARMTargetLowering::ReconstructShuffle(SDValue Op,
4035 SelectionDAG &DAG) const {
4036 DebugLoc dl = Op.getDebugLoc();
4037 EVT VT = Op.getValueType();
4038 unsigned NumElts = VT.getVectorNumElements();
4040 SmallVector<SDValue, 2> SourceVecs;
4041 SmallVector<unsigned, 2> MinElts;
4042 SmallVector<unsigned, 2> MaxElts;
4044 for (unsigned i = 0; i < NumElts; ++i) {
4045 SDValue V = Op.getOperand(i);
4046 if (V.getOpcode() == ISD::UNDEF)
4048 else if (V.getOpcode() != ISD::EXTRACT_VECTOR_ELT) {
4049 // A shuffle can only come from building a vector from various
4050 // elements of other vectors.
4054 // Record this extraction against the appropriate vector if possible...
4055 SDValue SourceVec = V.getOperand(0);
4056 unsigned EltNo = cast<ConstantSDNode>(V.getOperand(1))->getZExtValue();
4057 bool FoundSource = false;
4058 for (unsigned j = 0; j < SourceVecs.size(); ++j) {
4059 if (SourceVecs[j] == SourceVec) {
4060 if (MinElts[j] > EltNo)
4062 if (MaxElts[j] < EltNo)
4069 // Or record a new source if not...
4071 SourceVecs.push_back(SourceVec);
4072 MinElts.push_back(EltNo);
4073 MaxElts.push_back(EltNo);
4077 // Currently only do something sane when at most two source vectors
4079 if (SourceVecs.size() > 2)
4082 SDValue ShuffleSrcs[2] = {DAG.getUNDEF(VT), DAG.getUNDEF(VT) };
4083 int VEXTOffsets[2] = {0, 0};
4085 // This loop extracts the usage patterns of the source vectors
4086 // and prepares appropriate SDValues for a shuffle if possible.
4087 for (unsigned i = 0; i < SourceVecs.size(); ++i) {
4088 if (SourceVecs[i].getValueType() == VT) {
4089 // No VEXT necessary
4090 ShuffleSrcs[i] = SourceVecs[i];
4093 } else if (SourceVecs[i].getValueType().getVectorNumElements() < NumElts) {
4094 // It probably isn't worth padding out a smaller vector just to
4095 // break it down again in a shuffle.
4099 // Since only 64-bit and 128-bit vectors are legal on ARM and
4100 // we've eliminated the other cases...
4101 assert(SourceVecs[i].getValueType().getVectorNumElements() == 2*NumElts &&
4102 "unexpected vector sizes in ReconstructShuffle");
4104 if (MaxElts[i] - MinElts[i] >= NumElts) {
4105 // Span too large for a VEXT to cope
4109 if (MinElts[i] >= NumElts) {
4110 // The extraction can just take the second half
4111 VEXTOffsets[i] = NumElts;
4112 ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4114 DAG.getIntPtrConstant(NumElts));
4115 } else if (MaxElts[i] < NumElts) {
4116 // The extraction can just take the first half
4118 ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4120 DAG.getIntPtrConstant(0));
4122 // An actual VEXT is needed
4123 VEXTOffsets[i] = MinElts[i];
4124 SDValue VEXTSrc1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4126 DAG.getIntPtrConstant(0));
4127 SDValue VEXTSrc2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4129 DAG.getIntPtrConstant(NumElts));
4130 ShuffleSrcs[i] = DAG.getNode(ARMISD::VEXT, dl, VT, VEXTSrc1, VEXTSrc2,
4131 DAG.getConstant(VEXTOffsets[i], MVT::i32));
4135 SmallVector<int, 8> Mask;
4137 for (unsigned i = 0; i < NumElts; ++i) {
4138 SDValue Entry = Op.getOperand(i);
4139 if (Entry.getOpcode() == ISD::UNDEF) {
4144 SDValue ExtractVec = Entry.getOperand(0);
4145 int ExtractElt = cast<ConstantSDNode>(Op.getOperand(i)
4146 .getOperand(1))->getSExtValue();
4147 if (ExtractVec == SourceVecs[0]) {
4148 Mask.push_back(ExtractElt - VEXTOffsets[0]);
4150 Mask.push_back(ExtractElt + NumElts - VEXTOffsets[1]);
4154 // Final check before we try to produce nonsense...
4155 if (isShuffleMaskLegal(Mask, VT))
4156 return DAG.getVectorShuffle(VT, dl, ShuffleSrcs[0], ShuffleSrcs[1],
4162 /// isShuffleMaskLegal - Targets can use this to indicate that they only
4163 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
4164 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
4165 /// are assumed to be legal.
4167 ARMTargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
4169 if (VT.getVectorNumElements() == 4 &&
4170 (VT.is128BitVector() || VT.is64BitVector())) {
4171 unsigned PFIndexes[4];
4172 for (unsigned i = 0; i != 4; ++i) {
4176 PFIndexes[i] = M[i];
4179 // Compute the index in the perfect shuffle table.
4180 unsigned PFTableIndex =
4181 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
4182 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
4183 unsigned Cost = (PFEntry >> 30);
4190 unsigned Imm, WhichResult;
4192 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4193 return (EltSize >= 32 ||
4194 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
4195 isVREVMask(M, VT, 64) ||
4196 isVREVMask(M, VT, 32) ||
4197 isVREVMask(M, VT, 16) ||
4198 isVEXTMask(M, VT, ReverseVEXT, Imm) ||
4199 isVTBLMask(M, VT) ||
4200 isVTRNMask(M, VT, WhichResult) ||
4201 isVUZPMask(M, VT, WhichResult) ||
4202 isVZIPMask(M, VT, WhichResult) ||
4203 isVTRN_v_undef_Mask(M, VT, WhichResult) ||
4204 isVUZP_v_undef_Mask(M, VT, WhichResult) ||
4205 isVZIP_v_undef_Mask(M, VT, WhichResult));
4208 /// GeneratePerfectShuffle - Given an entry in the perfect-shuffle table, emit
4209 /// the specified operations to build the shuffle.
4210 static SDValue GeneratePerfectShuffle(unsigned PFEntry, SDValue LHS,
4211 SDValue RHS, SelectionDAG &DAG,
4213 unsigned OpNum = (PFEntry >> 26) & 0x0F;
4214 unsigned LHSID = (PFEntry >> 13) & ((1 << 13)-1);
4215 unsigned RHSID = (PFEntry >> 0) & ((1 << 13)-1);
4218 OP_COPY = 0, // Copy, used for things like <u,u,u,3> to say it is <0,1,2,3>
4227 OP_VUZPL, // VUZP, left result
4228 OP_VUZPR, // VUZP, right result
4229 OP_VZIPL, // VZIP, left result
4230 OP_VZIPR, // VZIP, right result
4231 OP_VTRNL, // VTRN, left result
4232 OP_VTRNR // VTRN, right result
4235 if (OpNum == OP_COPY) {
4236 if (LHSID == (1*9+2)*9+3) return LHS;
4237 assert(LHSID == ((4*9+5)*9+6)*9+7 && "Illegal OP_COPY!");
4241 SDValue OpLHS, OpRHS;
4242 OpLHS = GeneratePerfectShuffle(PerfectShuffleTable[LHSID], LHS, RHS, DAG, dl);
4243 OpRHS = GeneratePerfectShuffle(PerfectShuffleTable[RHSID], LHS, RHS, DAG, dl);
4244 EVT VT = OpLHS.getValueType();
4247 default: llvm_unreachable("Unknown shuffle opcode!");
4249 // VREV divides the vector in half and swaps within the half.
4250 if (VT.getVectorElementType() == MVT::i32 ||
4251 VT.getVectorElementType() == MVT::f32)
4252 return DAG.getNode(ARMISD::VREV64, dl, VT, OpLHS);
4253 // vrev <4 x i16> -> VREV32
4254 if (VT.getVectorElementType() == MVT::i16)
4255 return DAG.getNode(ARMISD::VREV32, dl, VT, OpLHS);
4256 // vrev <4 x i8> -> VREV16
4257 assert(VT.getVectorElementType() == MVT::i8);
4258 return DAG.getNode(ARMISD::VREV16, dl, VT, OpLHS);
4263 return DAG.getNode(ARMISD::VDUPLANE, dl, VT,
4264 OpLHS, DAG.getConstant(OpNum-OP_VDUP0, MVT::i32));
4268 return DAG.getNode(ARMISD::VEXT, dl, VT,
4270 DAG.getConstant(OpNum-OP_VEXT1+1, MVT::i32));
4273 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
4274 OpLHS, OpRHS).getValue(OpNum-OP_VUZPL);
4277 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
4278 OpLHS, OpRHS).getValue(OpNum-OP_VZIPL);
4281 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
4282 OpLHS, OpRHS).getValue(OpNum-OP_VTRNL);
4286 static SDValue LowerVECTOR_SHUFFLEv8i8(SDValue Op,
4287 SmallVectorImpl<int> &ShuffleMask,
4288 SelectionDAG &DAG) {
4289 // Check to see if we can use the VTBL instruction.
4290 SDValue V1 = Op.getOperand(0);
4291 SDValue V2 = Op.getOperand(1);
4292 DebugLoc DL = Op.getDebugLoc();
4294 SmallVector<SDValue, 8> VTBLMask;
4295 for (SmallVectorImpl<int>::iterator
4296 I = ShuffleMask.begin(), E = ShuffleMask.end(); I != E; ++I)
4297 VTBLMask.push_back(DAG.getConstant(*I, MVT::i32));
4299 if (V2.getNode()->getOpcode() == ISD::UNDEF)
4300 return DAG.getNode(ARMISD::VTBL1, DL, MVT::v8i8, V1,
4301 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8,
4304 return DAG.getNode(ARMISD::VTBL2, DL, MVT::v8i8, V1, V2,
4305 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8,
4309 static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
4310 SDValue V1 = Op.getOperand(0);
4311 SDValue V2 = Op.getOperand(1);
4312 DebugLoc dl = Op.getDebugLoc();
4313 EVT VT = Op.getValueType();
4314 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op.getNode());
4315 SmallVector<int, 8> ShuffleMask;
4317 // Convert shuffles that are directly supported on NEON to target-specific
4318 // DAG nodes, instead of keeping them as shuffles and matching them again
4319 // during code selection. This is more efficient and avoids the possibility
4320 // of inconsistencies between legalization and selection.
4321 // FIXME: floating-point vectors should be canonicalized to integer vectors
4322 // of the same time so that they get CSEd properly.
4323 SVN->getMask(ShuffleMask);
4325 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4326 if (EltSize <= 32) {
4327 if (ShuffleVectorSDNode::isSplatMask(&ShuffleMask[0], VT)) {
4328 int Lane = SVN->getSplatIndex();
4329 // If this is undef splat, generate it via "just" vdup, if possible.
4330 if (Lane == -1) Lane = 0;
4332 if (Lane == 0 && V1.getOpcode() == ISD::SCALAR_TO_VECTOR) {
4333 return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
4335 return DAG.getNode(ARMISD::VDUPLANE, dl, VT, V1,
4336 DAG.getConstant(Lane, MVT::i32));
4341 if (isVEXTMask(ShuffleMask, VT, ReverseVEXT, Imm)) {
4344 return DAG.getNode(ARMISD::VEXT, dl, VT, V1, V2,
4345 DAG.getConstant(Imm, MVT::i32));
4348 if (isVREVMask(ShuffleMask, VT, 64))
4349 return DAG.getNode(ARMISD::VREV64, dl, VT, V1);
4350 if (isVREVMask(ShuffleMask, VT, 32))
4351 return DAG.getNode(ARMISD::VREV32, dl, VT, V1);
4352 if (isVREVMask(ShuffleMask, VT, 16))
4353 return DAG.getNode(ARMISD::VREV16, dl, VT, V1);
4355 // Check for Neon shuffles that modify both input vectors in place.
4356 // If both results are used, i.e., if there are two shuffles with the same
4357 // source operands and with masks corresponding to both results of one of
4358 // these operations, DAG memoization will ensure that a single node is
4359 // used for both shuffles.
4360 unsigned WhichResult;
4361 if (isVTRNMask(ShuffleMask, VT, WhichResult))
4362 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
4363 V1, V2).getValue(WhichResult);
4364 if (isVUZPMask(ShuffleMask, VT, WhichResult))
4365 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
4366 V1, V2).getValue(WhichResult);
4367 if (isVZIPMask(ShuffleMask, VT, WhichResult))
4368 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
4369 V1, V2).getValue(WhichResult);
4371 if (isVTRN_v_undef_Mask(ShuffleMask, VT, WhichResult))
4372 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
4373 V1, V1).getValue(WhichResult);
4374 if (isVUZP_v_undef_Mask(ShuffleMask, VT, WhichResult))
4375 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
4376 V1, V1).getValue(WhichResult);
4377 if (isVZIP_v_undef_Mask(ShuffleMask, VT, WhichResult))
4378 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
4379 V1, V1).getValue(WhichResult);
4382 // If the shuffle is not directly supported and it has 4 elements, use
4383 // the PerfectShuffle-generated table to synthesize it from other shuffles.
4384 unsigned NumElts = VT.getVectorNumElements();
4386 unsigned PFIndexes[4];
4387 for (unsigned i = 0; i != 4; ++i) {
4388 if (ShuffleMask[i] < 0)
4391 PFIndexes[i] = ShuffleMask[i];
4394 // Compute the index in the perfect shuffle table.
4395 unsigned PFTableIndex =
4396 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
4397 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
4398 unsigned Cost = (PFEntry >> 30);
4401 return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl);
4404 // Implement shuffles with 32- or 64-bit elements as ARMISD::BUILD_VECTORs.
4405 if (EltSize >= 32) {
4406 // Do the expansion with floating-point types, since that is what the VFP
4407 // registers are defined to use, and since i64 is not legal.
4408 EVT EltVT = EVT::getFloatingPointVT(EltSize);
4409 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
4410 V1 = DAG.getNode(ISD::BITCAST, dl, VecVT, V1);
4411 V2 = DAG.getNode(ISD::BITCAST, dl, VecVT, V2);
4412 SmallVector<SDValue, 8> Ops;
4413 for (unsigned i = 0; i < NumElts; ++i) {
4414 if (ShuffleMask[i] < 0)
4415 Ops.push_back(DAG.getUNDEF(EltVT));
4417 Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT,
4418 ShuffleMask[i] < (int)NumElts ? V1 : V2,
4419 DAG.getConstant(ShuffleMask[i] & (NumElts-1),
4422 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, &Ops[0],NumElts);
4423 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
4426 if (VT == MVT::v8i8) {
4427 SDValue NewOp = LowerVECTOR_SHUFFLEv8i8(Op, ShuffleMask, DAG);
4428 if (NewOp.getNode())
4435 static SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
4436 // EXTRACT_VECTOR_ELT is legal only for immediate indexes.
4437 SDValue Lane = Op.getOperand(1);
4438 if (!isa<ConstantSDNode>(Lane))
4441 SDValue Vec = Op.getOperand(0);
4442 if (Op.getValueType() == MVT::i32 &&
4443 Vec.getValueType().getVectorElementType().getSizeInBits() < 32) {
4444 DebugLoc dl = Op.getDebugLoc();
4445 return DAG.getNode(ARMISD::VGETLANEu, dl, MVT::i32, Vec, Lane);
4451 static SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
4452 // The only time a CONCAT_VECTORS operation can have legal types is when
4453 // two 64-bit vectors are concatenated to a 128-bit vector.
4454 assert(Op.getValueType().is128BitVector() && Op.getNumOperands() == 2 &&
4455 "unexpected CONCAT_VECTORS");
4456 DebugLoc dl = Op.getDebugLoc();
4457 SDValue Val = DAG.getUNDEF(MVT::v2f64);
4458 SDValue Op0 = Op.getOperand(0);
4459 SDValue Op1 = Op.getOperand(1);
4460 if (Op0.getOpcode() != ISD::UNDEF)
4461 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
4462 DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op0),
4463 DAG.getIntPtrConstant(0));
4464 if (Op1.getOpcode() != ISD::UNDEF)
4465 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
4466 DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op1),
4467 DAG.getIntPtrConstant(1));
4468 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Val);
4471 /// isExtendedBUILD_VECTOR - Check if N is a constant BUILD_VECTOR where each
4472 /// element has been zero/sign-extended, depending on the isSigned parameter,
4473 /// from an integer type half its size.
4474 static bool isExtendedBUILD_VECTOR(SDNode *N, SelectionDAG &DAG,
4476 // A v2i64 BUILD_VECTOR will have been legalized to a BITCAST from v4i32.
4477 EVT VT = N->getValueType(0);
4478 if (VT == MVT::v2i64 && N->getOpcode() == ISD::BITCAST) {
4479 SDNode *BVN = N->getOperand(0).getNode();
4480 if (BVN->getValueType(0) != MVT::v4i32 ||
4481 BVN->getOpcode() != ISD::BUILD_VECTOR)
4483 unsigned LoElt = DAG.getTargetLoweringInfo().isBigEndian() ? 1 : 0;
4484 unsigned HiElt = 1 - LoElt;
4485 ConstantSDNode *Lo0 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt));
4486 ConstantSDNode *Hi0 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt));
4487 ConstantSDNode *Lo1 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt+2));
4488 ConstantSDNode *Hi1 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt+2));
4489 if (!Lo0 || !Hi0 || !Lo1 || !Hi1)
4492 if (Hi0->getSExtValue() == Lo0->getSExtValue() >> 32 &&
4493 Hi1->getSExtValue() == Lo1->getSExtValue() >> 32)
4496 if (Hi0->isNullValue() && Hi1->isNullValue())
4502 if (N->getOpcode() != ISD::BUILD_VECTOR)
4505 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
4506 SDNode *Elt = N->getOperand(i).getNode();
4507 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Elt)) {
4508 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4509 unsigned HalfSize = EltSize / 2;
4511 int64_t SExtVal = C->getSExtValue();
4512 if ((SExtVal >> HalfSize) != (SExtVal >> EltSize))
4515 if ((C->getZExtValue() >> HalfSize) != 0)
4526 /// isSignExtended - Check if a node is a vector value that is sign-extended
4527 /// or a constant BUILD_VECTOR with sign-extended elements.
4528 static bool isSignExtended(SDNode *N, SelectionDAG &DAG) {
4529 if (N->getOpcode() == ISD::SIGN_EXTEND || ISD::isSEXTLoad(N))
4531 if (isExtendedBUILD_VECTOR(N, DAG, true))
4536 /// isZeroExtended - Check if a node is a vector value that is zero-extended
4537 /// or a constant BUILD_VECTOR with zero-extended elements.
4538 static bool isZeroExtended(SDNode *N, SelectionDAG &DAG) {
4539 if (N->getOpcode() == ISD::ZERO_EXTEND || ISD::isZEXTLoad(N))
4541 if (isExtendedBUILD_VECTOR(N, DAG, false))
4546 /// SkipExtension - For a node that is a SIGN_EXTEND, ZERO_EXTEND, extending
4547 /// load, or BUILD_VECTOR with extended elements, return the unextended value.
4548 static SDValue SkipExtension(SDNode *N, SelectionDAG &DAG) {
4549 if (N->getOpcode() == ISD::SIGN_EXTEND || N->getOpcode() == ISD::ZERO_EXTEND)
4550 return N->getOperand(0);
4551 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N))
4552 return DAG.getLoad(LD->getMemoryVT(), N->getDebugLoc(), LD->getChain(),
4553 LD->getBasePtr(), LD->getPointerInfo(), LD->isVolatile(),
4554 LD->isNonTemporal(), LD->getAlignment());
4555 // Otherwise, the value must be a BUILD_VECTOR. For v2i64, it will
4556 // have been legalized as a BITCAST from v4i32.
4557 if (N->getOpcode() == ISD::BITCAST) {
4558 SDNode *BVN = N->getOperand(0).getNode();
4559 assert(BVN->getOpcode() == ISD::BUILD_VECTOR &&
4560 BVN->getValueType(0) == MVT::v4i32 && "expected v4i32 BUILD_VECTOR");
4561 unsigned LowElt = DAG.getTargetLoweringInfo().isBigEndian() ? 1 : 0;
4562 return DAG.getNode(ISD::BUILD_VECTOR, N->getDebugLoc(), MVT::v2i32,
4563 BVN->getOperand(LowElt), BVN->getOperand(LowElt+2));
4565 // Construct a new BUILD_VECTOR with elements truncated to half the size.
4566 assert(N->getOpcode() == ISD::BUILD_VECTOR && "expected BUILD_VECTOR");
4567 EVT VT = N->getValueType(0);
4568 unsigned EltSize = VT.getVectorElementType().getSizeInBits() / 2;
4569 unsigned NumElts = VT.getVectorNumElements();
4570 MVT TruncVT = MVT::getIntegerVT(EltSize);
4571 SmallVector<SDValue, 8> Ops;
4572 for (unsigned i = 0; i != NumElts; ++i) {
4573 ConstantSDNode *C = cast<ConstantSDNode>(N->getOperand(i));
4574 const APInt &CInt = C->getAPIntValue();
4575 Ops.push_back(DAG.getConstant(CInt.trunc(EltSize), TruncVT));
4577 return DAG.getNode(ISD::BUILD_VECTOR, N->getDebugLoc(),
4578 MVT::getVectorVT(TruncVT, NumElts), Ops.data(), NumElts);
4581 static bool isAddSubSExt(SDNode *N, SelectionDAG &DAG) {
4582 unsigned Opcode = N->getOpcode();
4583 if (Opcode == ISD::ADD || Opcode == ISD::SUB) {
4584 SDNode *N0 = N->getOperand(0).getNode();
4585 SDNode *N1 = N->getOperand(1).getNode();
4586 return N0->hasOneUse() && N1->hasOneUse() &&
4587 isSignExtended(N0, DAG) && isSignExtended(N1, DAG);
4592 static bool isAddSubZExt(SDNode *N, SelectionDAG &DAG) {
4593 unsigned Opcode = N->getOpcode();
4594 if (Opcode == ISD::ADD || Opcode == ISD::SUB) {
4595 SDNode *N0 = N->getOperand(0).getNode();
4596 SDNode *N1 = N->getOperand(1).getNode();
4597 return N0->hasOneUse() && N1->hasOneUse() &&
4598 isZeroExtended(N0, DAG) && isZeroExtended(N1, DAG);
4603 static SDValue LowerMUL(SDValue Op, SelectionDAG &DAG) {
4604 // Multiplications are only custom-lowered for 128-bit vectors so that
4605 // VMULL can be detected. Otherwise v2i64 multiplications are not legal.
4606 EVT VT = Op.getValueType();
4607 assert(VT.is128BitVector() && "unexpected type for custom-lowering ISD::MUL");
4608 SDNode *N0 = Op.getOperand(0).getNode();
4609 SDNode *N1 = Op.getOperand(1).getNode();
4610 unsigned NewOpc = 0;
4612 bool isN0SExt = isSignExtended(N0, DAG);
4613 bool isN1SExt = isSignExtended(N1, DAG);
4614 if (isN0SExt && isN1SExt)
4615 NewOpc = ARMISD::VMULLs;
4617 bool isN0ZExt = isZeroExtended(N0, DAG);
4618 bool isN1ZExt = isZeroExtended(N1, DAG);
4619 if (isN0ZExt && isN1ZExt)
4620 NewOpc = ARMISD::VMULLu;
4621 else if (isN1SExt || isN1ZExt) {
4622 // Look for (s/zext A + s/zext B) * (s/zext C). We want to turn these
4623 // into (s/zext A * s/zext C) + (s/zext B * s/zext C)
4624 if (isN1SExt && isAddSubSExt(N0, DAG)) {
4625 NewOpc = ARMISD::VMULLs;
4627 } else if (isN1ZExt && isAddSubZExt(N0, DAG)) {
4628 NewOpc = ARMISD::VMULLu;
4630 } else if (isN0ZExt && isAddSubZExt(N1, DAG)) {
4632 NewOpc = ARMISD::VMULLu;
4638 if (VT == MVT::v2i64)
4639 // Fall through to expand this. It is not legal.
4642 // Other vector multiplications are legal.
4647 // Legalize to a VMULL instruction.
4648 DebugLoc DL = Op.getDebugLoc();
4650 SDValue Op1 = SkipExtension(N1, DAG);
4652 Op0 = SkipExtension(N0, DAG);
4653 assert(Op0.getValueType().is64BitVector() &&
4654 Op1.getValueType().is64BitVector() &&
4655 "unexpected types for extended operands to VMULL");
4656 return DAG.getNode(NewOpc, DL, VT, Op0, Op1);
4659 // Optimizing (zext A + zext B) * C, to (VMULL A, C) + (VMULL B, C) during
4660 // isel lowering to take advantage of no-stall back to back vmul + vmla.
4667 SDValue N00 = SkipExtension(N0->getOperand(0).getNode(), DAG);
4668 SDValue N01 = SkipExtension(N0->getOperand(1).getNode(), DAG);
4669 EVT Op1VT = Op1.getValueType();
4670 return DAG.getNode(N0->getOpcode(), DL, VT,
4671 DAG.getNode(NewOpc, DL, VT,
4672 DAG.getNode(ISD::BITCAST, DL, Op1VT, N00), Op1),
4673 DAG.getNode(NewOpc, DL, VT,
4674 DAG.getNode(ISD::BITCAST, DL, Op1VT, N01), Op1));
4678 LowerSDIV_v4i8(SDValue X, SDValue Y, DebugLoc dl, SelectionDAG &DAG) {
4680 // float4 xf = vcvt_f32_s32(vmovl_s16(a.lo));
4681 // float4 yf = vcvt_f32_s32(vmovl_s16(b.lo));
4682 X = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, X);
4683 Y = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, Y);
4684 X = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, X);
4685 Y = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, Y);
4686 // Get reciprocal estimate.
4687 // float4 recip = vrecpeq_f32(yf);
4688 Y = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4689 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), Y);
4690 // Because char has a smaller range than uchar, we can actually get away
4691 // without any newton steps. This requires that we use a weird bias
4692 // of 0xb000, however (again, this has been exhaustively tested).
4693 // float4 result = as_float4(as_int4(xf*recip) + 0xb000);
4694 X = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, X, Y);
4695 X = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, X);
4696 Y = DAG.getConstant(0xb000, MVT::i32);
4697 Y = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Y, Y, Y, Y);
4698 X = DAG.getNode(ISD::ADD, dl, MVT::v4i32, X, Y);
4699 X = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, X);
4700 // Convert back to short.
4701 X = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, X);
4702 X = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, X);
4707 LowerSDIV_v4i16(SDValue N0, SDValue N1, DebugLoc dl, SelectionDAG &DAG) {
4709 // Convert to float.
4710 // float4 yf = vcvt_f32_s32(vmovl_s16(y));
4711 // float4 xf = vcvt_f32_s32(vmovl_s16(x));
4712 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N0);
4713 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N1);
4714 N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0);
4715 N1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1);
4717 // Use reciprocal estimate and one refinement step.
4718 // float4 recip = vrecpeq_f32(yf);
4719 // recip *= vrecpsq_f32(yf, recip);
4720 N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4721 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), N1);
4722 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4723 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
4725 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
4726 // Because short has a smaller range than ushort, we can actually get away
4727 // with only a single newton step. This requires that we use a weird bias
4728 // of 89, however (again, this has been exhaustively tested).
4729 // float4 result = as_float4(as_int4(xf*recip) + 0x89);
4730 N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2);
4731 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0);
4732 N1 = DAG.getConstant(0x89, MVT::i32);
4733 N1 = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, N1, N1, N1, N1);
4734 N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1);
4735 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0);
4736 // Convert back to integer and return.
4737 // return vmovn_s32(vcvt_s32_f32(result));
4738 N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0);
4739 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0);
4743 static SDValue LowerSDIV(SDValue Op, SelectionDAG &DAG) {
4744 EVT VT = Op.getValueType();
4745 assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&
4746 "unexpected type for custom-lowering ISD::SDIV");
4748 DebugLoc dl = Op.getDebugLoc();
4749 SDValue N0 = Op.getOperand(0);
4750 SDValue N1 = Op.getOperand(1);
4753 if (VT == MVT::v8i8) {
4754 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N0);
4755 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N1);
4757 N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
4758 DAG.getIntPtrConstant(4));
4759 N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
4760 DAG.getIntPtrConstant(4));
4761 N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
4762 DAG.getIntPtrConstant(0));
4763 N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
4764 DAG.getIntPtrConstant(0));
4766 N0 = LowerSDIV_v4i8(N0, N1, dl, DAG); // v4i16
4767 N2 = LowerSDIV_v4i8(N2, N3, dl, DAG); // v4i16
4769 N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2);
4770 N0 = LowerCONCAT_VECTORS(N0, DAG);
4772 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v8i8, N0);
4775 return LowerSDIV_v4i16(N0, N1, dl, DAG);
4778 static SDValue LowerUDIV(SDValue Op, SelectionDAG &DAG) {
4779 EVT VT = Op.getValueType();
4780 assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&
4781 "unexpected type for custom-lowering ISD::UDIV");
4783 DebugLoc dl = Op.getDebugLoc();
4784 SDValue N0 = Op.getOperand(0);
4785 SDValue N1 = Op.getOperand(1);
4788 if (VT == MVT::v8i8) {
4789 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N0);
4790 N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N1);
4792 N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
4793 DAG.getIntPtrConstant(4));
4794 N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
4795 DAG.getIntPtrConstant(4));
4796 N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
4797 DAG.getIntPtrConstant(0));
4798 N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
4799 DAG.getIntPtrConstant(0));
4801 N0 = LowerSDIV_v4i16(N0, N1, dl, DAG); // v4i16
4802 N2 = LowerSDIV_v4i16(N2, N3, dl, DAG); // v4i16
4804 N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2);
4805 N0 = LowerCONCAT_VECTORS(N0, DAG);
4807 N0 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v8i8,
4808 DAG.getConstant(Intrinsic::arm_neon_vqmovnsu, MVT::i32),
4813 // v4i16 sdiv ... Convert to float.
4814 // float4 yf = vcvt_f32_s32(vmovl_u16(y));
4815 // float4 xf = vcvt_f32_s32(vmovl_u16(x));
4816 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N0);
4817 N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N1);
4818 N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0);
4819 SDValue BN1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1);
4821 // Use reciprocal estimate and two refinement steps.
4822 // float4 recip = vrecpeq_f32(yf);
4823 // recip *= vrecpsq_f32(yf, recip);
4824 // recip *= vrecpsq_f32(yf, recip);
4825 N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4826 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), BN1);
4827 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4828 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
4830 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
4831 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4832 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
4834 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
4835 // Simply multiplying by the reciprocal estimate can leave us a few ulps
4836 // too low, so we add 2 ulps (exhaustive testing shows that this is enough,
4837 // and that it will never cause us to return an answer too large).
4838 // float4 result = as_float4(as_int4(xf*recip) + 2);
4839 N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2);
4840 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0);
4841 N1 = DAG.getConstant(2, MVT::i32);
4842 N1 = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, N1, N1, N1, N1);
4843 N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1);
4844 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0);
4845 // Convert back to integer and return.
4846 // return vmovn_u32(vcvt_s32_f32(result));
4847 N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0);
4848 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0);
4852 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
4853 EVT VT = Op.getNode()->getValueType(0);
4854 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
4857 bool ExtraOp = false;
4858 switch (Op.getOpcode()) {
4859 default: assert(0 && "Invalid code");
4860 case ISD::ADDC: Opc = ARMISD::ADDC; break;
4861 case ISD::ADDE: Opc = ARMISD::ADDE; ExtraOp = true; break;
4862 case ISD::SUBC: Opc = ARMISD::SUBC; break;
4863 case ISD::SUBE: Opc = ARMISD::SUBE; ExtraOp = true; break;
4867 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
4869 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
4870 Op.getOperand(1), Op.getOperand(2));
4873 static SDValue LowerAtomicLoadStore(SDValue Op, SelectionDAG &DAG) {
4874 // Monotonic load/store is legal for all targets
4875 if (cast<AtomicSDNode>(Op)->getOrdering() <= Monotonic)
4878 // Aquire/Release load/store is not legal for targets without a
4879 // dmb or equivalent available.
4885 ReplaceATOMIC_OP_64(SDNode *Node, SmallVectorImpl<SDValue>& Results,
4886 SelectionDAG &DAG, unsigned NewOp) {
4887 EVT T = Node->getValueType(0);
4888 DebugLoc dl = Node->getDebugLoc();
4889 assert (T == MVT::i64 && "Only know how to expand i64 atomics");
4891 SmallVector<SDValue, 6> Ops;
4892 Ops.push_back(Node->getOperand(0)); // Chain
4893 Ops.push_back(Node->getOperand(1)); // Ptr
4895 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
4896 Node->getOperand(2), DAG.getIntPtrConstant(0)));
4897 // High part of Val1
4898 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
4899 Node->getOperand(2), DAG.getIntPtrConstant(1)));
4900 if (NewOp == ARMISD::ATOMCMPXCHG64_DAG) {
4901 // High part of Val1
4902 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
4903 Node->getOperand(3), DAG.getIntPtrConstant(0)));
4904 // High part of Val2
4905 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
4906 Node->getOperand(3), DAG.getIntPtrConstant(1)));
4908 SDVTList Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
4910 DAG.getMemIntrinsicNode(NewOp, dl, Tys, Ops.data(), Ops.size(), MVT::i64,
4911 cast<MemSDNode>(Node)->getMemOperand());
4912 SDValue OpsF[] = { Result.getValue(0), Result.getValue(1) };
4913 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
4914 Results.push_back(Result.getValue(2));
4917 SDValue ARMTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
4918 switch (Op.getOpcode()) {
4919 default: llvm_unreachable("Don't know how to custom lower this!");
4920 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
4921 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
4922 case ISD::GlobalAddress:
4923 return Subtarget->isTargetDarwin() ? LowerGlobalAddressDarwin(Op, DAG) :
4924 LowerGlobalAddressELF(Op, DAG);
4925 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
4926 case ISD::SELECT: return LowerSELECT(Op, DAG);
4927 case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
4928 case ISD::BR_CC: return LowerBR_CC(Op, DAG);
4929 case ISD::BR_JT: return LowerBR_JT(Op, DAG);
4930 case ISD::VASTART: return LowerVASTART(Op, DAG);
4931 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op, DAG, Subtarget);
4932 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG, Subtarget);
4933 case ISD::PREFETCH: return LowerPREFETCH(Op, DAG, Subtarget);
4934 case ISD::SINT_TO_FP:
4935 case ISD::UINT_TO_FP: return LowerINT_TO_FP(Op, DAG);
4936 case ISD::FP_TO_SINT:
4937 case ISD::FP_TO_UINT: return LowerFP_TO_INT(Op, DAG);
4938 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
4939 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
4940 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
4941 case ISD::GLOBAL_OFFSET_TABLE: return LowerGLOBAL_OFFSET_TABLE(Op, DAG);
4942 case ISD::EH_SJLJ_SETJMP: return LowerEH_SJLJ_SETJMP(Op, DAG);
4943 case ISD::EH_SJLJ_LONGJMP: return LowerEH_SJLJ_LONGJMP(Op, DAG);
4944 case ISD::EH_SJLJ_DISPATCHSETUP: return LowerEH_SJLJ_DISPATCHSETUP(Op, DAG);
4945 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG,
4947 case ISD::BITCAST: return ExpandBITCAST(Op.getNode(), DAG);
4950 case ISD::SRA: return LowerShift(Op.getNode(), DAG, Subtarget);
4951 case ISD::SHL_PARTS: return LowerShiftLeftParts(Op, DAG);
4952 case ISD::SRL_PARTS:
4953 case ISD::SRA_PARTS: return LowerShiftRightParts(Op, DAG);
4954 case ISD::CTTZ: return LowerCTTZ(Op.getNode(), DAG, Subtarget);
4955 case ISD::SETCC: return LowerVSETCC(Op, DAG);
4956 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG, Subtarget);
4957 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
4958 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
4959 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
4960 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
4961 case ISD::MUL: return LowerMUL(Op, DAG);
4962 case ISD::SDIV: return LowerSDIV(Op, DAG);
4963 case ISD::UDIV: return LowerUDIV(Op, DAG);
4967 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
4968 case ISD::ATOMIC_LOAD:
4969 case ISD::ATOMIC_STORE: return LowerAtomicLoadStore(Op, DAG);
4974 /// ReplaceNodeResults - Replace the results of node with an illegal result
4975 /// type with new values built out of custom code.
4976 void ARMTargetLowering::ReplaceNodeResults(SDNode *N,
4977 SmallVectorImpl<SDValue>&Results,
4978 SelectionDAG &DAG) const {
4980 switch (N->getOpcode()) {
4982 llvm_unreachable("Don't know how to custom expand this!");
4985 Res = ExpandBITCAST(N, DAG);
4989 Res = Expand64BitShift(N, DAG, Subtarget);
4991 case ISD::ATOMIC_LOAD_ADD:
4992 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMADD64_DAG);
4994 case ISD::ATOMIC_LOAD_AND:
4995 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMAND64_DAG);
4997 case ISD::ATOMIC_LOAD_NAND:
4998 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMNAND64_DAG);
5000 case ISD::ATOMIC_LOAD_OR:
5001 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMOR64_DAG);
5003 case ISD::ATOMIC_LOAD_SUB:
5004 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMSUB64_DAG);
5006 case ISD::ATOMIC_LOAD_XOR:
5007 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMXOR64_DAG);
5009 case ISD::ATOMIC_SWAP:
5010 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMSWAP64_DAG);
5012 case ISD::ATOMIC_CMP_SWAP:
5013 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMCMPXCHG64_DAG);
5017 Results.push_back(Res);
5020 //===----------------------------------------------------------------------===//
5021 // ARM Scheduler Hooks
5022 //===----------------------------------------------------------------------===//
5025 ARMTargetLowering::EmitAtomicCmpSwap(MachineInstr *MI,
5026 MachineBasicBlock *BB,
5027 unsigned Size) const {
5028 unsigned dest = MI->getOperand(0).getReg();
5029 unsigned ptr = MI->getOperand(1).getReg();
5030 unsigned oldval = MI->getOperand(2).getReg();
5031 unsigned newval = MI->getOperand(3).getReg();
5032 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5033 DebugLoc dl = MI->getDebugLoc();
5034 bool isThumb2 = Subtarget->isThumb2();
5036 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5038 MRI.createVirtualRegister(isThumb2 ? ARM::rGPRRegisterClass
5039 : ARM::GPRRegisterClass);
5042 MRI.constrainRegClass(dest, ARM::rGPRRegisterClass);
5043 MRI.constrainRegClass(oldval, ARM::rGPRRegisterClass);
5044 MRI.constrainRegClass(newval, ARM::rGPRRegisterClass);
5047 unsigned ldrOpc, strOpc;
5049 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
5051 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
5052 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
5055 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
5056 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
5059 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
5060 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
5064 MachineFunction *MF = BB->getParent();
5065 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5066 MachineFunction::iterator It = BB;
5067 ++It; // insert the new blocks after the current block
5069 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
5070 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
5071 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5072 MF->insert(It, loop1MBB);
5073 MF->insert(It, loop2MBB);
5074 MF->insert(It, exitMBB);
5076 // Transfer the remainder of BB and its successor edges to exitMBB.
5077 exitMBB->splice(exitMBB->begin(), BB,
5078 llvm::next(MachineBasicBlock::iterator(MI)),
5080 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5084 // fallthrough --> loop1MBB
5085 BB->addSuccessor(loop1MBB);
5088 // ldrex dest, [ptr]
5092 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr);
5093 if (ldrOpc == ARM::t2LDREX)
5095 AddDefaultPred(MIB);
5096 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
5097 .addReg(dest).addReg(oldval));
5098 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5099 .addMBB(exitMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5100 BB->addSuccessor(loop2MBB);
5101 BB->addSuccessor(exitMBB);
5104 // strex scratch, newval, [ptr]
5108 MIB = BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(newval).addReg(ptr);
5109 if (strOpc == ARM::t2STREX)
5111 AddDefaultPred(MIB);
5112 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5113 .addReg(scratch).addImm(0));
5114 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5115 .addMBB(loop1MBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5116 BB->addSuccessor(loop1MBB);
5117 BB->addSuccessor(exitMBB);
5123 MI->eraseFromParent(); // The instruction is gone now.
5129 ARMTargetLowering::EmitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
5130 unsigned Size, unsigned BinOpcode) const {
5131 // This also handles ATOMIC_SWAP, indicated by BinOpcode==0.
5132 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5134 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5135 MachineFunction *MF = BB->getParent();
5136 MachineFunction::iterator It = BB;
5139 unsigned dest = MI->getOperand(0).getReg();
5140 unsigned ptr = MI->getOperand(1).getReg();
5141 unsigned incr = MI->getOperand(2).getReg();
5142 DebugLoc dl = MI->getDebugLoc();
5143 bool isThumb2 = Subtarget->isThumb2();
5145 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5147 MRI.constrainRegClass(dest, ARM::rGPRRegisterClass);
5148 MRI.constrainRegClass(ptr, ARM::rGPRRegisterClass);
5151 unsigned ldrOpc, strOpc;
5153 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
5155 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
5156 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
5159 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
5160 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
5163 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
5164 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
5168 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5169 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5170 MF->insert(It, loopMBB);
5171 MF->insert(It, exitMBB);
5173 // Transfer the remainder of BB and its successor edges to exitMBB.
5174 exitMBB->splice(exitMBB->begin(), BB,
5175 llvm::next(MachineBasicBlock::iterator(MI)),
5177 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5179 TargetRegisterClass *TRC =
5180 isThumb2 ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
5181 unsigned scratch = MRI.createVirtualRegister(TRC);
5182 unsigned scratch2 = (!BinOpcode) ? incr : MRI.createVirtualRegister(TRC);
5186 // fallthrough --> loopMBB
5187 BB->addSuccessor(loopMBB);
5191 // <binop> scratch2, dest, incr
5192 // strex scratch, scratch2, ptr
5195 // fallthrough --> exitMBB
5197 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr);
5198 if (ldrOpc == ARM::t2LDREX)
5200 AddDefaultPred(MIB);
5202 // operand order needs to go the other way for NAND
5203 if (BinOpcode == ARM::BICrr || BinOpcode == ARM::t2BICrr)
5204 AddDefaultPred(BuildMI(BB, dl, TII->get(BinOpcode), scratch2).
5205 addReg(incr).addReg(dest)).addReg(0);
5207 AddDefaultPred(BuildMI(BB, dl, TII->get(BinOpcode), scratch2).
5208 addReg(dest).addReg(incr)).addReg(0);
5211 MIB = BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(scratch2).addReg(ptr);
5212 if (strOpc == ARM::t2STREX)
5214 AddDefaultPred(MIB);
5215 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5216 .addReg(scratch).addImm(0));
5217 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5218 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5220 BB->addSuccessor(loopMBB);
5221 BB->addSuccessor(exitMBB);
5227 MI->eraseFromParent(); // The instruction is gone now.
5233 ARMTargetLowering::EmitAtomicBinaryMinMax(MachineInstr *MI,
5234 MachineBasicBlock *BB,
5237 ARMCC::CondCodes Cond) const {
5238 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5240 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5241 MachineFunction *MF = BB->getParent();
5242 MachineFunction::iterator It = BB;
5245 unsigned dest = MI->getOperand(0).getReg();
5246 unsigned ptr = MI->getOperand(1).getReg();
5247 unsigned incr = MI->getOperand(2).getReg();
5248 unsigned oldval = dest;
5249 DebugLoc dl = MI->getDebugLoc();
5250 bool isThumb2 = Subtarget->isThumb2();
5252 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5254 MRI.constrainRegClass(dest, ARM::rGPRRegisterClass);
5255 MRI.constrainRegClass(ptr, ARM::rGPRRegisterClass);
5258 unsigned ldrOpc, strOpc, extendOpc;
5260 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
5262 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
5263 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
5264 extendOpc = isThumb2 ? ARM::t2SXTB : ARM::SXTB;
5267 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
5268 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
5269 extendOpc = isThumb2 ? ARM::t2SXTH : ARM::SXTH;
5272 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
5273 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
5278 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5279 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5280 MF->insert(It, loopMBB);
5281 MF->insert(It, exitMBB);
5283 // Transfer the remainder of BB and its successor edges to exitMBB.
5284 exitMBB->splice(exitMBB->begin(), BB,
5285 llvm::next(MachineBasicBlock::iterator(MI)),
5287 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5289 TargetRegisterClass *TRC =
5290 isThumb2 ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
5291 unsigned scratch = MRI.createVirtualRegister(TRC);
5292 unsigned scratch2 = MRI.createVirtualRegister(TRC);
5296 // fallthrough --> loopMBB
5297 BB->addSuccessor(loopMBB);
5301 // (sign extend dest, if required)
5303 // cmov.cond scratch2, dest, incr
5304 // strex scratch, scratch2, ptr
5307 // fallthrough --> exitMBB
5309 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr);
5310 if (ldrOpc == ARM::t2LDREX)
5312 AddDefaultPred(MIB);
5314 // Sign extend the value, if necessary.
5315 if (signExtend && extendOpc) {
5316 oldval = MRI.createVirtualRegister(ARM::GPRRegisterClass);
5317 AddDefaultPred(BuildMI(BB, dl, TII->get(extendOpc), oldval)
5322 // Build compare and cmov instructions.
5323 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
5324 .addReg(oldval).addReg(incr));
5325 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2MOVCCr : ARM::MOVCCr), scratch2)
5326 .addReg(oldval).addReg(incr).addImm(Cond).addReg(ARM::CPSR);
5328 MIB = BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(scratch2).addReg(ptr);
5329 if (strOpc == ARM::t2STREX)
5331 AddDefaultPred(MIB);
5332 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5333 .addReg(scratch).addImm(0));
5334 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5335 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5337 BB->addSuccessor(loopMBB);
5338 BB->addSuccessor(exitMBB);
5344 MI->eraseFromParent(); // The instruction is gone now.
5350 ARMTargetLowering::EmitAtomicBinary64(MachineInstr *MI, MachineBasicBlock *BB,
5351 unsigned Op1, unsigned Op2,
5352 bool NeedsCarry, bool IsCmpxchg) const {
5353 // This also handles ATOMIC_SWAP, indicated by Op1==0.
5354 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5356 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5357 MachineFunction *MF = BB->getParent();
5358 MachineFunction::iterator It = BB;
5361 unsigned destlo = MI->getOperand(0).getReg();
5362 unsigned desthi = MI->getOperand(1).getReg();
5363 unsigned ptr = MI->getOperand(2).getReg();
5364 unsigned vallo = MI->getOperand(3).getReg();
5365 unsigned valhi = MI->getOperand(4).getReg();
5366 DebugLoc dl = MI->getDebugLoc();
5367 bool isThumb2 = Subtarget->isThumb2();
5369 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5371 MRI.constrainRegClass(destlo, ARM::rGPRRegisterClass);
5372 MRI.constrainRegClass(desthi, ARM::rGPRRegisterClass);
5373 MRI.constrainRegClass(ptr, ARM::rGPRRegisterClass);
5376 unsigned ldrOpc = isThumb2 ? ARM::t2LDREXD : ARM::LDREXD;
5377 unsigned strOpc = isThumb2 ? ARM::t2STREXD : ARM::STREXD;
5379 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5380 MachineBasicBlock *contBB = 0, *cont2BB = 0;
5382 contBB = MF->CreateMachineBasicBlock(LLVM_BB);
5383 cont2BB = MF->CreateMachineBasicBlock(LLVM_BB);
5385 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5386 MF->insert(It, loopMBB);
5388 MF->insert(It, contBB);
5389 MF->insert(It, cont2BB);
5391 MF->insert(It, exitMBB);
5393 // Transfer the remainder of BB and its successor edges to exitMBB.
5394 exitMBB->splice(exitMBB->begin(), BB,
5395 llvm::next(MachineBasicBlock::iterator(MI)),
5397 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5399 TargetRegisterClass *TRC =
5400 isThumb2 ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
5401 unsigned storesuccess = MRI.createVirtualRegister(TRC);
5405 // fallthrough --> loopMBB
5406 BB->addSuccessor(loopMBB);
5409 // ldrexd r2, r3, ptr
5410 // <binopa> r0, r2, incr
5411 // <binopb> r1, r3, incr
5412 // strexd storesuccess, r0, r1, ptr
5413 // cmp storesuccess, #0
5415 // fallthrough --> exitMBB
5417 // Note that the registers are explicitly specified because there is not any
5418 // way to force the register allocator to allocate a register pair.
5420 // FIXME: The hardcoded registers are not necessary for Thumb2, but we
5421 // need to properly enforce the restriction that the two output registers
5422 // for ldrexd must be different.
5425 AddDefaultPred(BuildMI(BB, dl, TII->get(ldrOpc))
5426 .addReg(ARM::R2, RegState::Define)
5427 .addReg(ARM::R3, RegState::Define).addReg(ptr));
5428 // Copy r2/r3 into dest. (This copy will normally be coalesced.)
5429 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), destlo).addReg(ARM::R2);
5430 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), desthi).addReg(ARM::R3);
5434 for (unsigned i = 0; i < 2; i++) {
5435 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr :
5437 .addReg(i == 0 ? destlo : desthi)
5438 .addReg(i == 0 ? vallo : valhi));
5439 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5440 .addMBB(exitMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5441 BB->addSuccessor(exitMBB);
5442 BB->addSuccessor(i == 0 ? contBB : cont2BB);
5443 BB = (i == 0 ? contBB : cont2BB);
5446 // Copy to physregs for strexd
5447 unsigned setlo = MI->getOperand(5).getReg();
5448 unsigned sethi = MI->getOperand(6).getReg();
5449 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R0).addReg(setlo);
5450 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R1).addReg(sethi);
5452 // Perform binary operation
5453 AddDefaultPred(BuildMI(BB, dl, TII->get(Op1), ARM::R0)
5454 .addReg(destlo).addReg(vallo))
5455 .addReg(NeedsCarry ? ARM::CPSR : 0, getDefRegState(NeedsCarry));
5456 AddDefaultPred(BuildMI(BB, dl, TII->get(Op2), ARM::R1)
5457 .addReg(desthi).addReg(valhi)).addReg(0);
5459 // Copy to physregs for strexd
5460 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R0).addReg(vallo);
5461 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R1).addReg(valhi);
5465 AddDefaultPred(BuildMI(BB, dl, TII->get(strOpc), storesuccess)
5466 .addReg(ARM::R0).addReg(ARM::R1).addReg(ptr));
5468 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5469 .addReg(storesuccess).addImm(0));
5470 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5471 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5473 BB->addSuccessor(loopMBB);
5474 BB->addSuccessor(exitMBB);
5480 MI->eraseFromParent(); // The instruction is gone now.
5486 MachineBasicBlock *OtherSucc(MachineBasicBlock *MBB, MachineBasicBlock *Succ) {
5487 for (MachineBasicBlock::succ_iterator I = MBB->succ_begin(),
5488 E = MBB->succ_end(); I != E; ++I)
5491 llvm_unreachable("Expecting a BB with two successors!");
5495 ARMTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
5496 MachineBasicBlock *BB) const {
5497 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5498 DebugLoc dl = MI->getDebugLoc();
5499 bool isThumb2 = Subtarget->isThumb2();
5500 switch (MI->getOpcode()) {
5503 llvm_unreachable("Unexpected instr type to insert");
5505 // The Thumb2 pre-indexed stores have the same MI operands, they just
5506 // define them differently in the .td files from the isel patterns, so
5507 // they need pseudos.
5508 case ARM::t2STR_preidx:
5509 MI->setDesc(TII->get(ARM::t2STR_PRE));
5511 case ARM::t2STRB_preidx:
5512 MI->setDesc(TII->get(ARM::t2STRB_PRE));
5514 case ARM::t2STRH_preidx:
5515 MI->setDesc(TII->get(ARM::t2STRH_PRE));
5518 case ARM::STRi_preidx:
5519 case ARM::STRBi_preidx: {
5520 unsigned NewOpc = MI->getOpcode() == ARM::STRi_preidx ?
5521 ARM::STR_PRE_IMM : ARM::STRB_PRE_IMM;
5522 // Decode the offset.
5523 unsigned Offset = MI->getOperand(4).getImm();
5524 bool isSub = ARM_AM::getAM2Op(Offset) == ARM_AM::sub;
5525 Offset = ARM_AM::getAM2Offset(Offset);
5529 MachineMemOperand *MMO = *MI->memoperands_begin();
5530 BuildMI(*BB, MI, dl, TII->get(NewOpc))
5531 .addOperand(MI->getOperand(0)) // Rn_wb
5532 .addOperand(MI->getOperand(1)) // Rt
5533 .addOperand(MI->getOperand(2)) // Rn
5534 .addImm(Offset) // offset (skip GPR==zero_reg)
5535 .addOperand(MI->getOperand(5)) // pred
5536 .addOperand(MI->getOperand(6))
5537 .addMemOperand(MMO);
5538 MI->eraseFromParent();
5541 case ARM::STRr_preidx:
5542 case ARM::STRBr_preidx:
5543 case ARM::STRH_preidx: {
5545 switch (MI->getOpcode()) {
5546 default: llvm_unreachable("unexpected opcode!");
5547 case ARM::STRr_preidx: NewOpc = ARM::STR_PRE_REG; break;
5548 case ARM::STRBr_preidx: NewOpc = ARM::STRB_PRE_REG; break;
5549 case ARM::STRH_preidx: NewOpc = ARM::STRH_PRE; break;
5551 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(NewOpc));
5552 for (unsigned i = 0; i < MI->getNumOperands(); ++i)
5553 MIB.addOperand(MI->getOperand(i));
5554 MI->eraseFromParent();
5557 case ARM::ATOMIC_LOAD_ADD_I8:
5558 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
5559 case ARM::ATOMIC_LOAD_ADD_I16:
5560 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
5561 case ARM::ATOMIC_LOAD_ADD_I32:
5562 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
5564 case ARM::ATOMIC_LOAD_AND_I8:
5565 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
5566 case ARM::ATOMIC_LOAD_AND_I16:
5567 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
5568 case ARM::ATOMIC_LOAD_AND_I32:
5569 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
5571 case ARM::ATOMIC_LOAD_OR_I8:
5572 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
5573 case ARM::ATOMIC_LOAD_OR_I16:
5574 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
5575 case ARM::ATOMIC_LOAD_OR_I32:
5576 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
5578 case ARM::ATOMIC_LOAD_XOR_I8:
5579 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
5580 case ARM::ATOMIC_LOAD_XOR_I16:
5581 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
5582 case ARM::ATOMIC_LOAD_XOR_I32:
5583 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
5585 case ARM::ATOMIC_LOAD_NAND_I8:
5586 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
5587 case ARM::ATOMIC_LOAD_NAND_I16:
5588 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
5589 case ARM::ATOMIC_LOAD_NAND_I32:
5590 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
5592 case ARM::ATOMIC_LOAD_SUB_I8:
5593 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
5594 case ARM::ATOMIC_LOAD_SUB_I16:
5595 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
5596 case ARM::ATOMIC_LOAD_SUB_I32:
5597 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
5599 case ARM::ATOMIC_LOAD_MIN_I8:
5600 return EmitAtomicBinaryMinMax(MI, BB, 1, true, ARMCC::LT);
5601 case ARM::ATOMIC_LOAD_MIN_I16:
5602 return EmitAtomicBinaryMinMax(MI, BB, 2, true, ARMCC::LT);
5603 case ARM::ATOMIC_LOAD_MIN_I32:
5604 return EmitAtomicBinaryMinMax(MI, BB, 4, true, ARMCC::LT);
5606 case ARM::ATOMIC_LOAD_MAX_I8:
5607 return EmitAtomicBinaryMinMax(MI, BB, 1, true, ARMCC::GT);
5608 case ARM::ATOMIC_LOAD_MAX_I16:
5609 return EmitAtomicBinaryMinMax(MI, BB, 2, true, ARMCC::GT);
5610 case ARM::ATOMIC_LOAD_MAX_I32:
5611 return EmitAtomicBinaryMinMax(MI, BB, 4, true, ARMCC::GT);
5613 case ARM::ATOMIC_LOAD_UMIN_I8:
5614 return EmitAtomicBinaryMinMax(MI, BB, 1, false, ARMCC::LO);
5615 case ARM::ATOMIC_LOAD_UMIN_I16:
5616 return EmitAtomicBinaryMinMax(MI, BB, 2, false, ARMCC::LO);
5617 case ARM::ATOMIC_LOAD_UMIN_I32:
5618 return EmitAtomicBinaryMinMax(MI, BB, 4, false, ARMCC::LO);
5620 case ARM::ATOMIC_LOAD_UMAX_I8:
5621 return EmitAtomicBinaryMinMax(MI, BB, 1, false, ARMCC::HI);
5622 case ARM::ATOMIC_LOAD_UMAX_I16:
5623 return EmitAtomicBinaryMinMax(MI, BB, 2, false, ARMCC::HI);
5624 case ARM::ATOMIC_LOAD_UMAX_I32:
5625 return EmitAtomicBinaryMinMax(MI, BB, 4, false, ARMCC::HI);
5627 case ARM::ATOMIC_SWAP_I8: return EmitAtomicBinary(MI, BB, 1, 0);
5628 case ARM::ATOMIC_SWAP_I16: return EmitAtomicBinary(MI, BB, 2, 0);
5629 case ARM::ATOMIC_SWAP_I32: return EmitAtomicBinary(MI, BB, 4, 0);
5631 case ARM::ATOMIC_CMP_SWAP_I8: return EmitAtomicCmpSwap(MI, BB, 1);
5632 case ARM::ATOMIC_CMP_SWAP_I16: return EmitAtomicCmpSwap(MI, BB, 2);
5633 case ARM::ATOMIC_CMP_SWAP_I32: return EmitAtomicCmpSwap(MI, BB, 4);
5636 case ARM::ATOMADD6432:
5637 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr,
5638 isThumb2 ? ARM::t2ADCrr : ARM::ADCrr,
5639 /*NeedsCarry*/ true);
5640 case ARM::ATOMSUB6432:
5641 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr,
5642 isThumb2 ? ARM::t2SBCrr : ARM::SBCrr,
5643 /*NeedsCarry*/ true);
5644 case ARM::ATOMOR6432:
5645 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr,
5646 isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
5647 case ARM::ATOMXOR6432:
5648 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2EORrr : ARM::EORrr,
5649 isThumb2 ? ARM::t2EORrr : ARM::EORrr);
5650 case ARM::ATOMAND6432:
5651 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr,
5652 isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
5653 case ARM::ATOMSWAP6432:
5654 return EmitAtomicBinary64(MI, BB, 0, 0, false);
5655 case ARM::ATOMCMPXCHG6432:
5656 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr,
5657 isThumb2 ? ARM::t2SBCrr : ARM::SBCrr,
5658 /*NeedsCarry*/ false, /*IsCmpxchg*/true);
5660 case ARM::tMOVCCr_pseudo: {
5661 // To "insert" a SELECT_CC instruction, we actually have to insert the
5662 // diamond control-flow pattern. The incoming instruction knows the
5663 // destination vreg to set, the condition code register to branch on, the
5664 // true/false values to select between, and a branch opcode to use.
5665 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5666 MachineFunction::iterator It = BB;
5672 // cmpTY ccX, r1, r2
5674 // fallthrough --> copy0MBB
5675 MachineBasicBlock *thisMBB = BB;
5676 MachineFunction *F = BB->getParent();
5677 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
5678 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
5679 F->insert(It, copy0MBB);
5680 F->insert(It, sinkMBB);
5682 // Transfer the remainder of BB and its successor edges to sinkMBB.
5683 sinkMBB->splice(sinkMBB->begin(), BB,
5684 llvm::next(MachineBasicBlock::iterator(MI)),
5686 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
5688 BB->addSuccessor(copy0MBB);
5689 BB->addSuccessor(sinkMBB);
5691 BuildMI(BB, dl, TII->get(ARM::tBcc)).addMBB(sinkMBB)
5692 .addImm(MI->getOperand(3).getImm()).addReg(MI->getOperand(4).getReg());
5695 // %FalseValue = ...
5696 // # fallthrough to sinkMBB
5699 // Update machine-CFG edges
5700 BB->addSuccessor(sinkMBB);
5703 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
5706 BuildMI(*BB, BB->begin(), dl,
5707 TII->get(ARM::PHI), MI->getOperand(0).getReg())
5708 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
5709 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
5711 MI->eraseFromParent(); // The pseudo instruction is gone now.
5716 case ARM::BCCZi64: {
5717 // If there is an unconditional branch to the other successor, remove it.
5718 BB->erase(llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
5720 // Compare both parts that make up the double comparison separately for
5722 bool RHSisZero = MI->getOpcode() == ARM::BCCZi64;
5724 unsigned LHS1 = MI->getOperand(1).getReg();
5725 unsigned LHS2 = MI->getOperand(2).getReg();
5727 AddDefaultPred(BuildMI(BB, dl,
5728 TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5729 .addReg(LHS1).addImm(0));
5730 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5731 .addReg(LHS2).addImm(0)
5732 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
5734 unsigned RHS1 = MI->getOperand(3).getReg();
5735 unsigned RHS2 = MI->getOperand(4).getReg();
5736 AddDefaultPred(BuildMI(BB, dl,
5737 TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
5738 .addReg(LHS1).addReg(RHS1));
5739 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
5740 .addReg(LHS2).addReg(RHS2)
5741 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
5744 MachineBasicBlock *destMBB = MI->getOperand(RHSisZero ? 3 : 5).getMBB();
5745 MachineBasicBlock *exitMBB = OtherSucc(BB, destMBB);
5746 if (MI->getOperand(0).getImm() == ARMCC::NE)
5747 std::swap(destMBB, exitMBB);
5749 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5750 .addMBB(destMBB).addImm(ARMCC::EQ).addReg(ARM::CPSR);
5752 AddDefaultPred(BuildMI(BB, dl, TII->get(ARM::t2B)).addMBB(exitMBB));
5754 BuildMI(BB, dl, TII->get(ARM::B)) .addMBB(exitMBB);
5756 MI->eraseFromParent(); // The pseudo instruction is gone now.
5762 void ARMTargetLowering::AdjustInstrPostInstrSelection(MachineInstr *MI,
5763 SDNode *Node) const {
5764 const MCInstrDesc &MCID = MI->getDesc();
5765 if (!MCID.hasPostISelHook()) {
5766 assert(!convertAddSubFlagsOpcode(MI->getOpcode()) &&
5767 "Pseudo flag-setting opcodes must be marked with 'hasPostISelHook'");
5771 // Adjust potentially 's' setting instructions after isel, i.e. ADC, SBC, RSB,
5772 // RSC. Coming out of isel, they have an implicit CPSR def, but the optional
5773 // operand is still set to noreg. If needed, set the optional operand's
5774 // register to CPSR, and remove the redundant implicit def.
5776 // e.g. ADCS (...opt:%noreg, CPSR<imp-def>) -> ADC (... opt:CPSR<def>).
5778 // Rename pseudo opcodes.
5779 unsigned NewOpc = convertAddSubFlagsOpcode(MI->getOpcode());
5781 const ARMBaseInstrInfo *TII =
5782 static_cast<const ARMBaseInstrInfo*>(getTargetMachine().getInstrInfo());
5783 MI->setDesc(TII->get(NewOpc));
5785 unsigned ccOutIdx = MCID.getNumOperands() - 1;
5787 // Any ARM instruction that sets the 's' bit should specify an optional
5788 // "cc_out" operand in the last operand position.
5789 if (!MCID.hasOptionalDef() || !MCID.OpInfo[ccOutIdx].isOptionalDef()) {
5790 assert(!NewOpc && "Optional cc_out operand required");
5793 // Look for an implicit def of CPSR added by MachineInstr ctor. Remove it
5794 // since we already have an optional CPSR def.
5795 bool definesCPSR = false;
5796 bool deadCPSR = false;
5797 for (unsigned i = MCID.getNumOperands(), e = MI->getNumOperands();
5799 const MachineOperand &MO = MI->getOperand(i);
5800 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR) {
5804 MI->RemoveOperand(i);
5809 assert(!NewOpc && "Optional cc_out operand required");
5812 assert(deadCPSR == !Node->hasAnyUseOfValue(1) && "inconsistent dead flag");
5814 assert(!MI->getOperand(ccOutIdx).getReg() &&
5815 "expect uninitialized optional cc_out operand");
5819 // If this instruction was defined with an optional CPSR def and its dag node
5820 // had a live implicit CPSR def, then activate the optional CPSR def.
5821 MachineOperand &MO = MI->getOperand(ccOutIdx);
5822 MO.setReg(ARM::CPSR);
5826 //===----------------------------------------------------------------------===//
5827 // ARM Optimization Hooks
5828 //===----------------------------------------------------------------------===//
5831 SDValue combineSelectAndUse(SDNode *N, SDValue Slct, SDValue OtherOp,
5832 TargetLowering::DAGCombinerInfo &DCI) {
5833 SelectionDAG &DAG = DCI.DAG;
5834 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
5835 EVT VT = N->getValueType(0);
5836 unsigned Opc = N->getOpcode();
5837 bool isSlctCC = Slct.getOpcode() == ISD::SELECT_CC;
5838 SDValue LHS = isSlctCC ? Slct.getOperand(2) : Slct.getOperand(1);
5839 SDValue RHS = isSlctCC ? Slct.getOperand(3) : Slct.getOperand(2);
5840 ISD::CondCode CC = ISD::SETCC_INVALID;
5843 CC = cast<CondCodeSDNode>(Slct.getOperand(4))->get();
5845 SDValue CCOp = Slct.getOperand(0);
5846 if (CCOp.getOpcode() == ISD::SETCC)
5847 CC = cast<CondCodeSDNode>(CCOp.getOperand(2))->get();
5850 bool DoXform = false;
5852 assert ((Opc == ISD::ADD || (Opc == ISD::SUB && Slct == N->getOperand(1))) &&
5855 if (LHS.getOpcode() == ISD::Constant &&
5856 cast<ConstantSDNode>(LHS)->isNullValue()) {
5858 } else if (CC != ISD::SETCC_INVALID &&
5859 RHS.getOpcode() == ISD::Constant &&
5860 cast<ConstantSDNode>(RHS)->isNullValue()) {
5861 std::swap(LHS, RHS);
5862 SDValue Op0 = Slct.getOperand(0);
5863 EVT OpVT = isSlctCC ? Op0.getValueType() :
5864 Op0.getOperand(0).getValueType();
5865 bool isInt = OpVT.isInteger();
5866 CC = ISD::getSetCCInverse(CC, isInt);
5868 if (!TLI.isCondCodeLegal(CC, OpVT))
5869 return SDValue(); // Inverse operator isn't legal.
5876 SDValue Result = DAG.getNode(Opc, RHS.getDebugLoc(), VT, OtherOp, RHS);
5878 return DAG.getSelectCC(N->getDebugLoc(), OtherOp, Result,
5879 Slct.getOperand(0), Slct.getOperand(1), CC);
5880 SDValue CCOp = Slct.getOperand(0);
5882 CCOp = DAG.getSetCC(Slct.getDebugLoc(), CCOp.getValueType(),
5883 CCOp.getOperand(0), CCOp.getOperand(1), CC);
5884 return DAG.getNode(ISD::SELECT, N->getDebugLoc(), VT,
5885 CCOp, OtherOp, Result);
5890 // AddCombineToVPADDL- For pair-wise add on neon, use the vpaddl instruction
5891 // (only after legalization).
5892 static SDValue AddCombineToVPADDL(SDNode *N, SDValue N0, SDValue N1,
5893 TargetLowering::DAGCombinerInfo &DCI,
5894 const ARMSubtarget *Subtarget) {
5896 // Only perform optimization if after legalize, and if NEON is available. We
5897 // also expected both operands to be BUILD_VECTORs.
5898 if (DCI.isBeforeLegalize() || !Subtarget->hasNEON()
5899 || N0.getOpcode() != ISD::BUILD_VECTOR
5900 || N1.getOpcode() != ISD::BUILD_VECTOR)
5903 // Check output type since VPADDL operand elements can only be 8, 16, or 32.
5904 EVT VT = N->getValueType(0);
5905 if (!VT.isInteger() || VT.getVectorElementType() == MVT::i64)
5908 // Check that the vector operands are of the right form.
5909 // N0 and N1 are BUILD_VECTOR nodes with N number of EXTRACT_VECTOR
5910 // operands, where N is the size of the formed vector.
5911 // Each EXTRACT_VECTOR should have the same input vector and odd or even
5912 // index such that we have a pair wise add pattern.
5914 // Grab the vector that all EXTRACT_VECTOR nodes should be referencing.
5915 if (N0->getOperand(0)->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
5917 SDValue Vec = N0->getOperand(0)->getOperand(0);
5918 SDNode *V = Vec.getNode();
5919 unsigned nextIndex = 0;
5921 // For each operands to the ADD which are BUILD_VECTORs,
5922 // check to see if each of their operands are an EXTRACT_VECTOR with
5923 // the same vector and appropriate index.
5924 for (unsigned i = 0, e = N0->getNumOperands(); i != e; ++i) {
5925 if (N0->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT
5926 && N1->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
5928 SDValue ExtVec0 = N0->getOperand(i);
5929 SDValue ExtVec1 = N1->getOperand(i);
5931 // First operand is the vector, verify its the same.
5932 if (V != ExtVec0->getOperand(0).getNode() ||
5933 V != ExtVec1->getOperand(0).getNode())
5936 // Second is the constant, verify its correct.
5937 ConstantSDNode *C0 = dyn_cast<ConstantSDNode>(ExtVec0->getOperand(1));
5938 ConstantSDNode *C1 = dyn_cast<ConstantSDNode>(ExtVec1->getOperand(1));
5940 // For the constant, we want to see all the even or all the odd.
5941 if (!C0 || !C1 || C0->getZExtValue() != nextIndex
5942 || C1->getZExtValue() != nextIndex+1)
5951 // Create VPADDL node.
5952 SelectionDAG &DAG = DCI.DAG;
5953 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
5955 // Build operand list.
5956 SmallVector<SDValue, 8> Ops;
5957 Ops.push_back(DAG.getConstant(Intrinsic::arm_neon_vpaddls,
5958 TLI.getPointerTy()));
5960 // Input is the vector.
5963 // Get widened type and narrowed type.
5965 unsigned numElem = VT.getVectorNumElements();
5966 switch (VT.getVectorElementType().getSimpleVT().SimpleTy) {
5967 case MVT::i8: widenType = MVT::getVectorVT(MVT::i16, numElem); break;
5968 case MVT::i16: widenType = MVT::getVectorVT(MVT::i32, numElem); break;
5969 case MVT::i32: widenType = MVT::getVectorVT(MVT::i64, numElem); break;
5971 assert(0 && "Invalid vector element type for padd optimization.");
5974 SDValue tmp = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, N->getDebugLoc(),
5975 widenType, &Ops[0], Ops.size());
5976 return DAG.getNode(ISD::TRUNCATE, N->getDebugLoc(), VT, tmp);
5979 /// PerformADDCombineWithOperands - Try DAG combinations for an ADD with
5980 /// operands N0 and N1. This is a helper for PerformADDCombine that is
5981 /// called with the default operands, and if that fails, with commuted
5983 static SDValue PerformADDCombineWithOperands(SDNode *N, SDValue N0, SDValue N1,
5984 TargetLowering::DAGCombinerInfo &DCI,
5985 const ARMSubtarget *Subtarget){
5987 // Attempt to create vpaddl for this add.
5988 SDValue Result = AddCombineToVPADDL(N, N0, N1, DCI, Subtarget);
5989 if (Result.getNode())
5992 // fold (add (select cc, 0, c), x) -> (select cc, x, (add, x, c))
5993 if (N0.getOpcode() == ISD::SELECT && N0.getNode()->hasOneUse()) {
5994 SDValue Result = combineSelectAndUse(N, N0, N1, DCI);
5995 if (Result.getNode()) return Result;
6000 /// PerformADDCombine - Target-specific dag combine xforms for ISD::ADD.
6002 static SDValue PerformADDCombine(SDNode *N,
6003 TargetLowering::DAGCombinerInfo &DCI,
6004 const ARMSubtarget *Subtarget) {
6005 SDValue N0 = N->getOperand(0);
6006 SDValue N1 = N->getOperand(1);
6008 // First try with the default operand order.
6009 SDValue Result = PerformADDCombineWithOperands(N, N0, N1, DCI, Subtarget);
6010 if (Result.getNode())
6013 // If that didn't work, try again with the operands commuted.
6014 return PerformADDCombineWithOperands(N, N1, N0, DCI, Subtarget);
6017 /// PerformSUBCombine - Target-specific dag combine xforms for ISD::SUB.
6019 static SDValue PerformSUBCombine(SDNode *N,
6020 TargetLowering::DAGCombinerInfo &DCI) {
6021 SDValue N0 = N->getOperand(0);
6022 SDValue N1 = N->getOperand(1);
6024 // fold (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c))
6025 if (N1.getOpcode() == ISD::SELECT && N1.getNode()->hasOneUse()) {
6026 SDValue Result = combineSelectAndUse(N, N1, N0, DCI);
6027 if (Result.getNode()) return Result;
6033 /// PerformVMULCombine
6034 /// Distribute (A + B) * C to (A * C) + (B * C) to take advantage of the
6035 /// special multiplier accumulator forwarding.
6041 static SDValue PerformVMULCombine(SDNode *N,
6042 TargetLowering::DAGCombinerInfo &DCI,
6043 const ARMSubtarget *Subtarget) {
6044 if (!Subtarget->hasVMLxForwarding())
6047 SelectionDAG &DAG = DCI.DAG;
6048 SDValue N0 = N->getOperand(0);
6049 SDValue N1 = N->getOperand(1);
6050 unsigned Opcode = N0.getOpcode();
6051 if (Opcode != ISD::ADD && Opcode != ISD::SUB &&
6052 Opcode != ISD::FADD && Opcode != ISD::FSUB) {
6053 Opcode = N1.getOpcode();
6054 if (Opcode != ISD::ADD && Opcode != ISD::SUB &&
6055 Opcode != ISD::FADD && Opcode != ISD::FSUB)
6060 EVT VT = N->getValueType(0);
6061 DebugLoc DL = N->getDebugLoc();
6062 SDValue N00 = N0->getOperand(0);
6063 SDValue N01 = N0->getOperand(1);
6064 return DAG.getNode(Opcode, DL, VT,
6065 DAG.getNode(ISD::MUL, DL, VT, N00, N1),
6066 DAG.getNode(ISD::MUL, DL, VT, N01, N1));
6069 static SDValue PerformMULCombine(SDNode *N,
6070 TargetLowering::DAGCombinerInfo &DCI,
6071 const ARMSubtarget *Subtarget) {
6072 SelectionDAG &DAG = DCI.DAG;
6074 if (Subtarget->isThumb1Only())
6077 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
6080 EVT VT = N->getValueType(0);
6081 if (VT.is64BitVector() || VT.is128BitVector())
6082 return PerformVMULCombine(N, DCI, Subtarget);
6086 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
6090 uint64_t MulAmt = C->getZExtValue();
6091 unsigned ShiftAmt = CountTrailingZeros_64(MulAmt);
6092 ShiftAmt = ShiftAmt & (32 - 1);
6093 SDValue V = N->getOperand(0);
6094 DebugLoc DL = N->getDebugLoc();
6097 MulAmt >>= ShiftAmt;
6098 if (isPowerOf2_32(MulAmt - 1)) {
6099 // (mul x, 2^N + 1) => (add (shl x, N), x)
6100 Res = DAG.getNode(ISD::ADD, DL, VT,
6101 V, DAG.getNode(ISD::SHL, DL, VT,
6102 V, DAG.getConstant(Log2_32(MulAmt-1),
6104 } else if (isPowerOf2_32(MulAmt + 1)) {
6105 // (mul x, 2^N - 1) => (sub (shl x, N), x)
6106 Res = DAG.getNode(ISD::SUB, DL, VT,
6107 DAG.getNode(ISD::SHL, DL, VT,
6108 V, DAG.getConstant(Log2_32(MulAmt+1),
6115 Res = DAG.getNode(ISD::SHL, DL, VT, Res,
6116 DAG.getConstant(ShiftAmt, MVT::i32));
6118 // Do not add new nodes to DAG combiner worklist.
6119 DCI.CombineTo(N, Res, false);
6123 static SDValue PerformANDCombine(SDNode *N,
6124 TargetLowering::DAGCombinerInfo &DCI) {
6126 // Attempt to use immediate-form VBIC
6127 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1));
6128 DebugLoc dl = N->getDebugLoc();
6129 EVT VT = N->getValueType(0);
6130 SelectionDAG &DAG = DCI.DAG;
6132 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
6135 APInt SplatBits, SplatUndef;
6136 unsigned SplatBitSize;
6139 BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
6140 if (SplatBitSize <= 64) {
6142 SDValue Val = isNEONModifiedImm((~SplatBits).getZExtValue(),
6143 SplatUndef.getZExtValue(), SplatBitSize,
6144 DAG, VbicVT, VT.is128BitVector(),
6146 if (Val.getNode()) {
6148 DAG.getNode(ISD::BITCAST, dl, VbicVT, N->getOperand(0));
6149 SDValue Vbic = DAG.getNode(ARMISD::VBICIMM, dl, VbicVT, Input, Val);
6150 return DAG.getNode(ISD::BITCAST, dl, VT, Vbic);
6158 /// PerformORCombine - Target-specific dag combine xforms for ISD::OR
6159 static SDValue PerformORCombine(SDNode *N,
6160 TargetLowering::DAGCombinerInfo &DCI,
6161 const ARMSubtarget *Subtarget) {
6162 // Attempt to use immediate-form VORR
6163 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1));
6164 DebugLoc dl = N->getDebugLoc();
6165 EVT VT = N->getValueType(0);
6166 SelectionDAG &DAG = DCI.DAG;
6168 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
6171 APInt SplatBits, SplatUndef;
6172 unsigned SplatBitSize;
6174 if (BVN && Subtarget->hasNEON() &&
6175 BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
6176 if (SplatBitSize <= 64) {
6178 SDValue Val = isNEONModifiedImm(SplatBits.getZExtValue(),
6179 SplatUndef.getZExtValue(), SplatBitSize,
6180 DAG, VorrVT, VT.is128BitVector(),
6182 if (Val.getNode()) {
6184 DAG.getNode(ISD::BITCAST, dl, VorrVT, N->getOperand(0));
6185 SDValue Vorr = DAG.getNode(ARMISD::VORRIMM, dl, VorrVT, Input, Val);
6186 return DAG.getNode(ISD::BITCAST, dl, VT, Vorr);
6191 SDValue N0 = N->getOperand(0);
6192 if (N0.getOpcode() != ISD::AND)
6194 SDValue N1 = N->getOperand(1);
6196 // (or (and B, A), (and C, ~A)) => (VBSL A, B, C) when A is a constant.
6197 if (Subtarget->hasNEON() && N1.getOpcode() == ISD::AND && VT.isVector() &&
6198 DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
6200 unsigned SplatBitSize;
6203 BuildVectorSDNode *BVN0 = dyn_cast<BuildVectorSDNode>(N0->getOperand(1));
6205 if (BVN0 && BVN0->isConstantSplat(SplatBits0, SplatUndef, SplatBitSize,
6206 HasAnyUndefs) && !HasAnyUndefs) {
6207 BuildVectorSDNode *BVN1 = dyn_cast<BuildVectorSDNode>(N1->getOperand(1));
6209 if (BVN1 && BVN1->isConstantSplat(SplatBits1, SplatUndef, SplatBitSize,
6210 HasAnyUndefs) && !HasAnyUndefs &&
6211 SplatBits0 == ~SplatBits1) {
6212 // Canonicalize the vector type to make instruction selection simpler.
6213 EVT CanonicalVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32;
6214 SDValue Result = DAG.getNode(ARMISD::VBSL, dl, CanonicalVT,
6215 N0->getOperand(1), N0->getOperand(0),
6217 return DAG.getNode(ISD::BITCAST, dl, VT, Result);
6222 // Try to use the ARM/Thumb2 BFI (bitfield insert) instruction when
6225 // BFI is only available on V6T2+
6226 if (Subtarget->isThumb1Only() || !Subtarget->hasV6T2Ops())
6229 DebugLoc DL = N->getDebugLoc();
6230 // 1) or (and A, mask), val => ARMbfi A, val, mask
6231 // iff (val & mask) == val
6233 // 2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
6234 // 2a) iff isBitFieldInvertedMask(mask) && isBitFieldInvertedMask(~mask2)
6235 // && mask == ~mask2
6236 // 2b) iff isBitFieldInvertedMask(~mask) && isBitFieldInvertedMask(mask2)
6237 // && ~mask == mask2
6238 // (i.e., copy a bitfield value into another bitfield of the same width)
6243 SDValue N00 = N0.getOperand(0);
6245 // The value and the mask need to be constants so we can verify this is
6246 // actually a bitfield set. If the mask is 0xffff, we can do better
6247 // via a movt instruction, so don't use BFI in that case.
6248 SDValue MaskOp = N0.getOperand(1);
6249 ConstantSDNode *MaskC = dyn_cast<ConstantSDNode>(MaskOp);
6252 unsigned Mask = MaskC->getZExtValue();
6256 // Case (1): or (and A, mask), val => ARMbfi A, val, mask
6257 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
6259 unsigned Val = N1C->getZExtValue();
6260 if ((Val & ~Mask) != Val)
6263 if (ARM::isBitFieldInvertedMask(Mask)) {
6264 Val >>= CountTrailingZeros_32(~Mask);
6266 Res = DAG.getNode(ARMISD::BFI, DL, VT, N00,
6267 DAG.getConstant(Val, MVT::i32),
6268 DAG.getConstant(Mask, MVT::i32));
6270 // Do not add new nodes to DAG combiner worklist.
6271 DCI.CombineTo(N, Res, false);
6274 } else if (N1.getOpcode() == ISD::AND) {
6275 // case (2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
6276 ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1));
6279 unsigned Mask2 = N11C->getZExtValue();
6281 // Mask and ~Mask2 (or reverse) must be equivalent for the BFI pattern
6283 if (ARM::isBitFieldInvertedMask(Mask) &&
6285 // The pack halfword instruction works better for masks that fit it,
6286 // so use that when it's available.
6287 if (Subtarget->hasT2ExtractPack() &&
6288 (Mask == 0xffff || Mask == 0xffff0000))
6291 unsigned amt = CountTrailingZeros_32(Mask2);
6292 Res = DAG.getNode(ISD::SRL, DL, VT, N1.getOperand(0),
6293 DAG.getConstant(amt, MVT::i32));
6294 Res = DAG.getNode(ARMISD::BFI, DL, VT, N00, Res,
6295 DAG.getConstant(Mask, MVT::i32));
6296 // Do not add new nodes to DAG combiner worklist.
6297 DCI.CombineTo(N, Res, false);
6299 } else if (ARM::isBitFieldInvertedMask(~Mask) &&
6301 // The pack halfword instruction works better for masks that fit it,
6302 // so use that when it's available.
6303 if (Subtarget->hasT2ExtractPack() &&
6304 (Mask2 == 0xffff || Mask2 == 0xffff0000))
6307 unsigned lsb = CountTrailingZeros_32(Mask);
6308 Res = DAG.getNode(ISD::SRL, DL, VT, N00,
6309 DAG.getConstant(lsb, MVT::i32));
6310 Res = DAG.getNode(ARMISD::BFI, DL, VT, N1.getOperand(0), Res,
6311 DAG.getConstant(Mask2, MVT::i32));
6312 // Do not add new nodes to DAG combiner worklist.
6313 DCI.CombineTo(N, Res, false);
6318 if (DAG.MaskedValueIsZero(N1, MaskC->getAPIntValue()) &&
6319 N00.getOpcode() == ISD::SHL && isa<ConstantSDNode>(N00.getOperand(1)) &&
6320 ARM::isBitFieldInvertedMask(~Mask)) {
6321 // Case (3): or (and (shl A, #shamt), mask), B => ARMbfi B, A, ~mask
6322 // where lsb(mask) == #shamt and masked bits of B are known zero.
6323 SDValue ShAmt = N00.getOperand(1);
6324 unsigned ShAmtC = cast<ConstantSDNode>(ShAmt)->getZExtValue();
6325 unsigned LSB = CountTrailingZeros_32(Mask);
6329 Res = DAG.getNode(ARMISD::BFI, DL, VT, N1, N00.getOperand(0),
6330 DAG.getConstant(~Mask, MVT::i32));
6332 // Do not add new nodes to DAG combiner worklist.
6333 DCI.CombineTo(N, Res, false);
6339 /// PerformBFICombine - (bfi A, (and B, Mask1), Mask2) -> (bfi A, B, Mask2) iff
6340 /// the bits being cleared by the AND are not demanded by the BFI.
6341 static SDValue PerformBFICombine(SDNode *N,
6342 TargetLowering::DAGCombinerInfo &DCI) {
6343 SDValue N1 = N->getOperand(1);
6344 if (N1.getOpcode() == ISD::AND) {
6345 ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1));
6348 unsigned InvMask = cast<ConstantSDNode>(N->getOperand(2))->getZExtValue();
6349 unsigned LSB = CountTrailingZeros_32(~InvMask);
6350 unsigned Width = (32 - CountLeadingZeros_32(~InvMask)) - LSB;
6351 unsigned Mask = (1 << Width)-1;
6352 unsigned Mask2 = N11C->getZExtValue();
6353 if ((Mask & (~Mask2)) == 0)
6354 return DCI.DAG.getNode(ARMISD::BFI, N->getDebugLoc(), N->getValueType(0),
6355 N->getOperand(0), N1.getOperand(0),
6361 /// PerformVMOVRRDCombine - Target-specific dag combine xforms for
6362 /// ARMISD::VMOVRRD.
6363 static SDValue PerformVMOVRRDCombine(SDNode *N,
6364 TargetLowering::DAGCombinerInfo &DCI) {
6365 // vmovrrd(vmovdrr x, y) -> x,y
6366 SDValue InDouble = N->getOperand(0);
6367 if (InDouble.getOpcode() == ARMISD::VMOVDRR)
6368 return DCI.CombineTo(N, InDouble.getOperand(0), InDouble.getOperand(1));
6370 // vmovrrd(load f64) -> (load i32), (load i32)
6371 SDNode *InNode = InDouble.getNode();
6372 if (ISD::isNormalLoad(InNode) && InNode->hasOneUse() &&
6373 InNode->getValueType(0) == MVT::f64 &&
6374 InNode->getOperand(1).getOpcode() == ISD::FrameIndex &&
6375 !cast<LoadSDNode>(InNode)->isVolatile()) {
6376 // TODO: Should this be done for non-FrameIndex operands?
6377 LoadSDNode *LD = cast<LoadSDNode>(InNode);
6379 SelectionDAG &DAG = DCI.DAG;
6380 DebugLoc DL = LD->getDebugLoc();
6381 SDValue BasePtr = LD->getBasePtr();
6382 SDValue NewLD1 = DAG.getLoad(MVT::i32, DL, LD->getChain(), BasePtr,
6383 LD->getPointerInfo(), LD->isVolatile(),
6384 LD->isNonTemporal(), LD->getAlignment());
6386 SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr,
6387 DAG.getConstant(4, MVT::i32));
6388 SDValue NewLD2 = DAG.getLoad(MVT::i32, DL, NewLD1.getValue(1), OffsetPtr,
6389 LD->getPointerInfo(), LD->isVolatile(),
6390 LD->isNonTemporal(),
6391 std::min(4U, LD->getAlignment() / 2));
6393 DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 1), NewLD2.getValue(1));
6394 SDValue Result = DCI.CombineTo(N, NewLD1, NewLD2);
6395 DCI.RemoveFromWorklist(LD);
6403 /// PerformVMOVDRRCombine - Target-specific dag combine xforms for
6404 /// ARMISD::VMOVDRR. This is also used for BUILD_VECTORs with 2 operands.
6405 static SDValue PerformVMOVDRRCombine(SDNode *N, SelectionDAG &DAG) {
6406 // N=vmovrrd(X); vmovdrr(N:0, N:1) -> bit_convert(X)
6407 SDValue Op0 = N->getOperand(0);
6408 SDValue Op1 = N->getOperand(1);
6409 if (Op0.getOpcode() == ISD::BITCAST)
6410 Op0 = Op0.getOperand(0);
6411 if (Op1.getOpcode() == ISD::BITCAST)
6412 Op1 = Op1.getOperand(0);
6413 if (Op0.getOpcode() == ARMISD::VMOVRRD &&
6414 Op0.getNode() == Op1.getNode() &&
6415 Op0.getResNo() == 0 && Op1.getResNo() == 1)
6416 return DAG.getNode(ISD::BITCAST, N->getDebugLoc(),
6417 N->getValueType(0), Op0.getOperand(0));
6421 /// PerformSTORECombine - Target-specific dag combine xforms for
6423 static SDValue PerformSTORECombine(SDNode *N,
6424 TargetLowering::DAGCombinerInfo &DCI) {
6425 // Bitcast an i64 store extracted from a vector to f64.
6426 // Otherwise, the i64 value will be legalized to a pair of i32 values.
6427 StoreSDNode *St = cast<StoreSDNode>(N);
6428 SDValue StVal = St->getValue();
6429 if (!ISD::isNormalStore(St) || St->isVolatile())
6432 if (StVal.getNode()->getOpcode() == ARMISD::VMOVDRR &&
6433 StVal.getNode()->hasOneUse() && !St->isVolatile()) {
6434 SelectionDAG &DAG = DCI.DAG;
6435 DebugLoc DL = St->getDebugLoc();
6436 SDValue BasePtr = St->getBasePtr();
6437 SDValue NewST1 = DAG.getStore(St->getChain(), DL,
6438 StVal.getNode()->getOperand(0), BasePtr,
6439 St->getPointerInfo(), St->isVolatile(),
6440 St->isNonTemporal(), St->getAlignment());
6442 SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr,
6443 DAG.getConstant(4, MVT::i32));
6444 return DAG.getStore(NewST1.getValue(0), DL, StVal.getNode()->getOperand(1),
6445 OffsetPtr, St->getPointerInfo(), St->isVolatile(),
6446 St->isNonTemporal(),
6447 std::min(4U, St->getAlignment() / 2));
6450 if (StVal.getValueType() != MVT::i64 ||
6451 StVal.getNode()->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
6454 SelectionDAG &DAG = DCI.DAG;
6455 DebugLoc dl = StVal.getDebugLoc();
6456 SDValue IntVec = StVal.getOperand(0);
6457 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64,
6458 IntVec.getValueType().getVectorNumElements());
6459 SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, IntVec);
6460 SDValue ExtElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
6461 Vec, StVal.getOperand(1));
6462 dl = N->getDebugLoc();
6463 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ExtElt);
6464 // Make the DAGCombiner fold the bitcasts.
6465 DCI.AddToWorklist(Vec.getNode());
6466 DCI.AddToWorklist(ExtElt.getNode());
6467 DCI.AddToWorklist(V.getNode());
6468 return DAG.getStore(St->getChain(), dl, V, St->getBasePtr(),
6469 St->getPointerInfo(), St->isVolatile(),
6470 St->isNonTemporal(), St->getAlignment(),
6474 /// hasNormalLoadOperand - Check if any of the operands of a BUILD_VECTOR node
6475 /// are normal, non-volatile loads. If so, it is profitable to bitcast an
6476 /// i64 vector to have f64 elements, since the value can then be loaded
6477 /// directly into a VFP register.
6478 static bool hasNormalLoadOperand(SDNode *N) {
6479 unsigned NumElts = N->getValueType(0).getVectorNumElements();
6480 for (unsigned i = 0; i < NumElts; ++i) {
6481 SDNode *Elt = N->getOperand(i).getNode();
6482 if (ISD::isNormalLoad(Elt) && !cast<LoadSDNode>(Elt)->isVolatile())
6488 /// PerformBUILD_VECTORCombine - Target-specific dag combine xforms for
6489 /// ISD::BUILD_VECTOR.
6490 static SDValue PerformBUILD_VECTORCombine(SDNode *N,
6491 TargetLowering::DAGCombinerInfo &DCI){
6492 // build_vector(N=ARMISD::VMOVRRD(X), N:1) -> bit_convert(X):
6493 // VMOVRRD is introduced when legalizing i64 types. It forces the i64 value
6494 // into a pair of GPRs, which is fine when the value is used as a scalar,
6495 // but if the i64 value is converted to a vector, we need to undo the VMOVRRD.
6496 SelectionDAG &DAG = DCI.DAG;
6497 if (N->getNumOperands() == 2) {
6498 SDValue RV = PerformVMOVDRRCombine(N, DAG);
6503 // Load i64 elements as f64 values so that type legalization does not split
6504 // them up into i32 values.
6505 EVT VT = N->getValueType(0);
6506 if (VT.getVectorElementType() != MVT::i64 || !hasNormalLoadOperand(N))
6508 DebugLoc dl = N->getDebugLoc();
6509 SmallVector<SDValue, 8> Ops;
6510 unsigned NumElts = VT.getVectorNumElements();
6511 for (unsigned i = 0; i < NumElts; ++i) {
6512 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(i));
6514 // Make the DAGCombiner fold the bitcast.
6515 DCI.AddToWorklist(V.getNode());
6517 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64, NumElts);
6518 SDValue BV = DAG.getNode(ISD::BUILD_VECTOR, dl, FloatVT, Ops.data(), NumElts);
6519 return DAG.getNode(ISD::BITCAST, dl, VT, BV);
6522 /// PerformInsertEltCombine - Target-specific dag combine xforms for
6523 /// ISD::INSERT_VECTOR_ELT.
6524 static SDValue PerformInsertEltCombine(SDNode *N,
6525 TargetLowering::DAGCombinerInfo &DCI) {
6526 // Bitcast an i64 load inserted into a vector to f64.
6527 // Otherwise, the i64 value will be legalized to a pair of i32 values.
6528 EVT VT = N->getValueType(0);
6529 SDNode *Elt = N->getOperand(1).getNode();
6530 if (VT.getVectorElementType() != MVT::i64 ||
6531 !ISD::isNormalLoad(Elt) || cast<LoadSDNode>(Elt)->isVolatile())
6534 SelectionDAG &DAG = DCI.DAG;
6535 DebugLoc dl = N->getDebugLoc();
6536 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64,
6537 VT.getVectorNumElements());
6538 SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, N->getOperand(0));
6539 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(1));
6540 // Make the DAGCombiner fold the bitcasts.
6541 DCI.AddToWorklist(Vec.getNode());
6542 DCI.AddToWorklist(V.getNode());
6543 SDValue InsElt = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, FloatVT,
6544 Vec, V, N->getOperand(2));
6545 return DAG.getNode(ISD::BITCAST, dl, VT, InsElt);
6548 /// PerformVECTOR_SHUFFLECombine - Target-specific dag combine xforms for
6549 /// ISD::VECTOR_SHUFFLE.
6550 static SDValue PerformVECTOR_SHUFFLECombine(SDNode *N, SelectionDAG &DAG) {
6551 // The LLVM shufflevector instruction does not require the shuffle mask
6552 // length to match the operand vector length, but ISD::VECTOR_SHUFFLE does
6553 // have that requirement. When translating to ISD::VECTOR_SHUFFLE, if the
6554 // operands do not match the mask length, they are extended by concatenating
6555 // them with undef vectors. That is probably the right thing for other
6556 // targets, but for NEON it is better to concatenate two double-register
6557 // size vector operands into a single quad-register size vector. Do that
6558 // transformation here:
6559 // shuffle(concat(v1, undef), concat(v2, undef)) ->
6560 // shuffle(concat(v1, v2), undef)
6561 SDValue Op0 = N->getOperand(0);
6562 SDValue Op1 = N->getOperand(1);
6563 if (Op0.getOpcode() != ISD::CONCAT_VECTORS ||
6564 Op1.getOpcode() != ISD::CONCAT_VECTORS ||
6565 Op0.getNumOperands() != 2 ||
6566 Op1.getNumOperands() != 2)
6568 SDValue Concat0Op1 = Op0.getOperand(1);
6569 SDValue Concat1Op1 = Op1.getOperand(1);
6570 if (Concat0Op1.getOpcode() != ISD::UNDEF ||
6571 Concat1Op1.getOpcode() != ISD::UNDEF)
6573 // Skip the transformation if any of the types are illegal.
6574 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
6575 EVT VT = N->getValueType(0);
6576 if (!TLI.isTypeLegal(VT) ||
6577 !TLI.isTypeLegal(Concat0Op1.getValueType()) ||
6578 !TLI.isTypeLegal(Concat1Op1.getValueType()))
6581 SDValue NewConcat = DAG.getNode(ISD::CONCAT_VECTORS, N->getDebugLoc(), VT,
6582 Op0.getOperand(0), Op1.getOperand(0));
6583 // Translate the shuffle mask.
6584 SmallVector<int, 16> NewMask;
6585 unsigned NumElts = VT.getVectorNumElements();
6586 unsigned HalfElts = NumElts/2;
6587 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(N);
6588 for (unsigned n = 0; n < NumElts; ++n) {
6589 int MaskElt = SVN->getMaskElt(n);
6591 if (MaskElt < (int)HalfElts)
6593 else if (MaskElt >= (int)NumElts && MaskElt < (int)(NumElts + HalfElts))
6594 NewElt = HalfElts + MaskElt - NumElts;
6595 NewMask.push_back(NewElt);
6597 return DAG.getVectorShuffle(VT, N->getDebugLoc(), NewConcat,
6598 DAG.getUNDEF(VT), NewMask.data());
6601 /// CombineBaseUpdate - Target-specific DAG combine function for VLDDUP and
6602 /// NEON load/store intrinsics to merge base address updates.
6603 static SDValue CombineBaseUpdate(SDNode *N,
6604 TargetLowering::DAGCombinerInfo &DCI) {
6605 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
6608 SelectionDAG &DAG = DCI.DAG;
6609 bool isIntrinsic = (N->getOpcode() == ISD::INTRINSIC_VOID ||
6610 N->getOpcode() == ISD::INTRINSIC_W_CHAIN);
6611 unsigned AddrOpIdx = (isIntrinsic ? 2 : 1);
6612 SDValue Addr = N->getOperand(AddrOpIdx);
6614 // Search for a use of the address operand that is an increment.
6615 for (SDNode::use_iterator UI = Addr.getNode()->use_begin(),
6616 UE = Addr.getNode()->use_end(); UI != UE; ++UI) {
6618 if (User->getOpcode() != ISD::ADD ||
6619 UI.getUse().getResNo() != Addr.getResNo())
6622 // Check that the add is independent of the load/store. Otherwise, folding
6623 // it would create a cycle.
6624 if (User->isPredecessorOf(N) || N->isPredecessorOf(User))
6627 // Find the new opcode for the updating load/store.
6629 bool isLaneOp = false;
6630 unsigned NewOpc = 0;
6631 unsigned NumVecs = 0;
6633 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue();
6635 default: assert(0 && "unexpected intrinsic for Neon base update");
6636 case Intrinsic::arm_neon_vld1: NewOpc = ARMISD::VLD1_UPD;
6638 case Intrinsic::arm_neon_vld2: NewOpc = ARMISD::VLD2_UPD;
6640 case Intrinsic::arm_neon_vld3: NewOpc = ARMISD::VLD3_UPD;
6642 case Intrinsic::arm_neon_vld4: NewOpc = ARMISD::VLD4_UPD;
6644 case Intrinsic::arm_neon_vld2lane: NewOpc = ARMISD::VLD2LN_UPD;
6645 NumVecs = 2; isLaneOp = true; break;
6646 case Intrinsic::arm_neon_vld3lane: NewOpc = ARMISD::VLD3LN_UPD;
6647 NumVecs = 3; isLaneOp = true; break;
6648 case Intrinsic::arm_neon_vld4lane: NewOpc = ARMISD::VLD4LN_UPD;
6649 NumVecs = 4; isLaneOp = true; break;
6650 case Intrinsic::arm_neon_vst1: NewOpc = ARMISD::VST1_UPD;
6651 NumVecs = 1; isLoad = false; break;
6652 case Intrinsic::arm_neon_vst2: NewOpc = ARMISD::VST2_UPD;
6653 NumVecs = 2; isLoad = false; break;
6654 case Intrinsic::arm_neon_vst3: NewOpc = ARMISD::VST3_UPD;
6655 NumVecs = 3; isLoad = false; break;
6656 case Intrinsic::arm_neon_vst4: NewOpc = ARMISD::VST4_UPD;
6657 NumVecs = 4; isLoad = false; break;
6658 case Intrinsic::arm_neon_vst2lane: NewOpc = ARMISD::VST2LN_UPD;
6659 NumVecs = 2; isLoad = false; isLaneOp = true; break;
6660 case Intrinsic::arm_neon_vst3lane: NewOpc = ARMISD::VST3LN_UPD;
6661 NumVecs = 3; isLoad = false; isLaneOp = true; break;
6662 case Intrinsic::arm_neon_vst4lane: NewOpc = ARMISD::VST4LN_UPD;
6663 NumVecs = 4; isLoad = false; isLaneOp = true; break;
6667 switch (N->getOpcode()) {
6668 default: assert(0 && "unexpected opcode for Neon base update");
6669 case ARMISD::VLD2DUP: NewOpc = ARMISD::VLD2DUP_UPD; NumVecs = 2; break;
6670 case ARMISD::VLD3DUP: NewOpc = ARMISD::VLD3DUP_UPD; NumVecs = 3; break;
6671 case ARMISD::VLD4DUP: NewOpc = ARMISD::VLD4DUP_UPD; NumVecs = 4; break;
6675 // Find the size of memory referenced by the load/store.
6678 VecTy = N->getValueType(0);
6680 VecTy = N->getOperand(AddrOpIdx+1).getValueType();
6681 unsigned NumBytes = NumVecs * VecTy.getSizeInBits() / 8;
6683 NumBytes /= VecTy.getVectorNumElements();
6685 // If the increment is a constant, it must match the memory ref size.
6686 SDValue Inc = User->getOperand(User->getOperand(0) == Addr ? 1 : 0);
6687 if (ConstantSDNode *CInc = dyn_cast<ConstantSDNode>(Inc.getNode())) {
6688 uint64_t IncVal = CInc->getZExtValue();
6689 if (IncVal != NumBytes)
6691 } else if (NumBytes >= 3 * 16) {
6692 // VLD3/4 and VST3/4 for 128-bit vectors are implemented with two
6693 // separate instructions that make it harder to use a non-constant update.
6697 // Create the new updating load/store node.
6699 unsigned NumResultVecs = (isLoad ? NumVecs : 0);
6701 for (n = 0; n < NumResultVecs; ++n)
6703 Tys[n++] = MVT::i32;
6704 Tys[n] = MVT::Other;
6705 SDVTList SDTys = DAG.getVTList(Tys, NumResultVecs+2);
6706 SmallVector<SDValue, 8> Ops;
6707 Ops.push_back(N->getOperand(0)); // incoming chain
6708 Ops.push_back(N->getOperand(AddrOpIdx));
6710 for (unsigned i = AddrOpIdx + 1; i < N->getNumOperands(); ++i) {
6711 Ops.push_back(N->getOperand(i));
6713 MemIntrinsicSDNode *MemInt = cast<MemIntrinsicSDNode>(N);
6714 SDValue UpdN = DAG.getMemIntrinsicNode(NewOpc, N->getDebugLoc(), SDTys,
6715 Ops.data(), Ops.size(),
6716 MemInt->getMemoryVT(),
6717 MemInt->getMemOperand());
6720 std::vector<SDValue> NewResults;
6721 for (unsigned i = 0; i < NumResultVecs; ++i) {
6722 NewResults.push_back(SDValue(UpdN.getNode(), i));
6724 NewResults.push_back(SDValue(UpdN.getNode(), NumResultVecs+1)); // chain
6725 DCI.CombineTo(N, NewResults);
6726 DCI.CombineTo(User, SDValue(UpdN.getNode(), NumResultVecs));
6733 /// CombineVLDDUP - For a VDUPLANE node N, check if its source operand is a
6734 /// vldN-lane (N > 1) intrinsic, and if all the other uses of that intrinsic
6735 /// are also VDUPLANEs. If so, combine them to a vldN-dup operation and
6737 static bool CombineVLDDUP(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) {
6738 SelectionDAG &DAG = DCI.DAG;
6739 EVT VT = N->getValueType(0);
6740 // vldN-dup instructions only support 64-bit vectors for N > 1.
6741 if (!VT.is64BitVector())
6744 // Check if the VDUPLANE operand is a vldN-dup intrinsic.
6745 SDNode *VLD = N->getOperand(0).getNode();
6746 if (VLD->getOpcode() != ISD::INTRINSIC_W_CHAIN)
6748 unsigned NumVecs = 0;
6749 unsigned NewOpc = 0;
6750 unsigned IntNo = cast<ConstantSDNode>(VLD->getOperand(1))->getZExtValue();
6751 if (IntNo == Intrinsic::arm_neon_vld2lane) {
6753 NewOpc = ARMISD::VLD2DUP;
6754 } else if (IntNo == Intrinsic::arm_neon_vld3lane) {
6756 NewOpc = ARMISD::VLD3DUP;
6757 } else if (IntNo == Intrinsic::arm_neon_vld4lane) {
6759 NewOpc = ARMISD::VLD4DUP;
6764 // First check that all the vldN-lane uses are VDUPLANEs and that the lane
6765 // numbers match the load.
6766 unsigned VLDLaneNo =
6767 cast<ConstantSDNode>(VLD->getOperand(NumVecs+3))->getZExtValue();
6768 for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
6770 // Ignore uses of the chain result.
6771 if (UI.getUse().getResNo() == NumVecs)
6774 if (User->getOpcode() != ARMISD::VDUPLANE ||
6775 VLDLaneNo != cast<ConstantSDNode>(User->getOperand(1))->getZExtValue())
6779 // Create the vldN-dup node.
6782 for (n = 0; n < NumVecs; ++n)
6784 Tys[n] = MVT::Other;
6785 SDVTList SDTys = DAG.getVTList(Tys, NumVecs+1);
6786 SDValue Ops[] = { VLD->getOperand(0), VLD->getOperand(2) };
6787 MemIntrinsicSDNode *VLDMemInt = cast<MemIntrinsicSDNode>(VLD);
6788 SDValue VLDDup = DAG.getMemIntrinsicNode(NewOpc, VLD->getDebugLoc(), SDTys,
6789 Ops, 2, VLDMemInt->getMemoryVT(),
6790 VLDMemInt->getMemOperand());
6793 for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
6795 unsigned ResNo = UI.getUse().getResNo();
6796 // Ignore uses of the chain result.
6797 if (ResNo == NumVecs)
6800 DCI.CombineTo(User, SDValue(VLDDup.getNode(), ResNo));
6803 // Now the vldN-lane intrinsic is dead except for its chain result.
6804 // Update uses of the chain.
6805 std::vector<SDValue> VLDDupResults;
6806 for (unsigned n = 0; n < NumVecs; ++n)
6807 VLDDupResults.push_back(SDValue(VLDDup.getNode(), n));
6808 VLDDupResults.push_back(SDValue(VLDDup.getNode(), NumVecs));
6809 DCI.CombineTo(VLD, VLDDupResults);
6814 /// PerformVDUPLANECombine - Target-specific dag combine xforms for
6815 /// ARMISD::VDUPLANE.
6816 static SDValue PerformVDUPLANECombine(SDNode *N,
6817 TargetLowering::DAGCombinerInfo &DCI) {
6818 SDValue Op = N->getOperand(0);
6820 // If the source is a vldN-lane (N > 1) intrinsic, and all the other uses
6821 // of that intrinsic are also VDUPLANEs, combine them to a vldN-dup operation.
6822 if (CombineVLDDUP(N, DCI))
6823 return SDValue(N, 0);
6825 // If the source is already a VMOVIMM or VMVNIMM splat, the VDUPLANE is
6826 // redundant. Ignore bit_converts for now; element sizes are checked below.
6827 while (Op.getOpcode() == ISD::BITCAST)
6828 Op = Op.getOperand(0);
6829 if (Op.getOpcode() != ARMISD::VMOVIMM && Op.getOpcode() != ARMISD::VMVNIMM)
6832 // Make sure the VMOV element size is not bigger than the VDUPLANE elements.
6833 unsigned EltSize = Op.getValueType().getVectorElementType().getSizeInBits();
6834 // The canonical VMOV for a zero vector uses a 32-bit element size.
6835 unsigned Imm = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
6837 if (ARM_AM::decodeNEONModImm(Imm, EltBits) == 0)
6839 EVT VT = N->getValueType(0);
6840 if (EltSize > VT.getVectorElementType().getSizeInBits())
6843 return DCI.DAG.getNode(ISD::BITCAST, N->getDebugLoc(), VT, Op);
6846 // isConstVecPow2 - Return true if each vector element is a power of 2, all
6847 // elements are the same constant, C, and Log2(C) ranges from 1 to 32.
6848 static bool isConstVecPow2(SDValue ConstVec, bool isSigned, uint64_t &C)
6852 for (unsigned I = 0, E = ConstVec.getValueType().getVectorNumElements();
6854 ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(ConstVec.getOperand(I));
6859 APFloat APF = C->getValueAPF();
6860 if (APF.convertToInteger(&cN, 64, isSigned, APFloat::rmTowardZero, &isExact)
6861 != APFloat::opOK || !isExact)
6864 c0 = (I == 0) ? cN : c0;
6865 if (!isPowerOf2_64(cN) || c0 != cN || Log2_64(c0) < 1 || Log2_64(c0) > 32)
6872 /// PerformVCVTCombine - VCVT (floating-point to fixed-point, Advanced SIMD)
6873 /// can replace combinations of VMUL and VCVT (floating-point to integer)
6874 /// when the VMUL has a constant operand that is a power of 2.
6876 /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>):
6877 /// vmul.f32 d16, d17, d16
6878 /// vcvt.s32.f32 d16, d16
6880 /// vcvt.s32.f32 d16, d16, #3
6881 static SDValue PerformVCVTCombine(SDNode *N,
6882 TargetLowering::DAGCombinerInfo &DCI,
6883 const ARMSubtarget *Subtarget) {
6884 SelectionDAG &DAG = DCI.DAG;
6885 SDValue Op = N->getOperand(0);
6887 if (!Subtarget->hasNEON() || !Op.getValueType().isVector() ||
6888 Op.getOpcode() != ISD::FMUL)
6892 SDValue N0 = Op->getOperand(0);
6893 SDValue ConstVec = Op->getOperand(1);
6894 bool isSigned = N->getOpcode() == ISD::FP_TO_SINT;
6896 if (ConstVec.getOpcode() != ISD::BUILD_VECTOR ||
6897 !isConstVecPow2(ConstVec, isSigned, C))
6900 unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfp2fxs :
6901 Intrinsic::arm_neon_vcvtfp2fxu;
6902 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, N->getDebugLoc(),
6904 DAG.getConstant(IntrinsicOpcode, MVT::i32), N0,
6905 DAG.getConstant(Log2_64(C), MVT::i32));
6908 /// PerformVDIVCombine - VCVT (fixed-point to floating-point, Advanced SIMD)
6909 /// can replace combinations of VCVT (integer to floating-point) and VDIV
6910 /// when the VDIV has a constant operand that is a power of 2.
6912 /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>):
6913 /// vcvt.f32.s32 d16, d16
6914 /// vdiv.f32 d16, d17, d16
6916 /// vcvt.f32.s32 d16, d16, #3
6917 static SDValue PerformVDIVCombine(SDNode *N,
6918 TargetLowering::DAGCombinerInfo &DCI,
6919 const ARMSubtarget *Subtarget) {
6920 SelectionDAG &DAG = DCI.DAG;
6921 SDValue Op = N->getOperand(0);
6922 unsigned OpOpcode = Op.getNode()->getOpcode();
6924 if (!Subtarget->hasNEON() || !N->getValueType(0).isVector() ||
6925 (OpOpcode != ISD::SINT_TO_FP && OpOpcode != ISD::UINT_TO_FP))
6929 SDValue ConstVec = N->getOperand(1);
6930 bool isSigned = OpOpcode == ISD::SINT_TO_FP;
6932 if (ConstVec.getOpcode() != ISD::BUILD_VECTOR ||
6933 !isConstVecPow2(ConstVec, isSigned, C))
6936 unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfxs2fp :
6937 Intrinsic::arm_neon_vcvtfxu2fp;
6938 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, N->getDebugLoc(),
6940 DAG.getConstant(IntrinsicOpcode, MVT::i32),
6941 Op.getOperand(0), DAG.getConstant(Log2_64(C), MVT::i32));
6944 /// Getvshiftimm - Check if this is a valid build_vector for the immediate
6945 /// operand of a vector shift operation, where all the elements of the
6946 /// build_vector must have the same constant integer value.
6947 static bool getVShiftImm(SDValue Op, unsigned ElementBits, int64_t &Cnt) {
6948 // Ignore bit_converts.
6949 while (Op.getOpcode() == ISD::BITCAST)
6950 Op = Op.getOperand(0);
6951 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
6952 APInt SplatBits, SplatUndef;
6953 unsigned SplatBitSize;
6955 if (! BVN || ! BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize,
6956 HasAnyUndefs, ElementBits) ||
6957 SplatBitSize > ElementBits)
6959 Cnt = SplatBits.getSExtValue();
6963 /// isVShiftLImm - Check if this is a valid build_vector for the immediate
6964 /// operand of a vector shift left operation. That value must be in the range:
6965 /// 0 <= Value < ElementBits for a left shift; or
6966 /// 0 <= Value <= ElementBits for a long left shift.
6967 static bool isVShiftLImm(SDValue Op, EVT VT, bool isLong, int64_t &Cnt) {
6968 assert(VT.isVector() && "vector shift count is not a vector type");
6969 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
6970 if (! getVShiftImm(Op, ElementBits, Cnt))
6972 return (Cnt >= 0 && (isLong ? Cnt-1 : Cnt) < ElementBits);
6975 /// isVShiftRImm - Check if this is a valid build_vector for the immediate
6976 /// operand of a vector shift right operation. For a shift opcode, the value
6977 /// is positive, but for an intrinsic the value count must be negative. The
6978 /// absolute value must be in the range:
6979 /// 1 <= |Value| <= ElementBits for a right shift; or
6980 /// 1 <= |Value| <= ElementBits/2 for a narrow right shift.
6981 static bool isVShiftRImm(SDValue Op, EVT VT, bool isNarrow, bool isIntrinsic,
6983 assert(VT.isVector() && "vector shift count is not a vector type");
6984 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
6985 if (! getVShiftImm(Op, ElementBits, Cnt))
6989 return (Cnt >= 1 && Cnt <= (isNarrow ? ElementBits/2 : ElementBits));
6992 /// PerformIntrinsicCombine - ARM-specific DAG combining for intrinsics.
6993 static SDValue PerformIntrinsicCombine(SDNode *N, SelectionDAG &DAG) {
6994 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
6997 // Don't do anything for most intrinsics.
7000 // Vector shifts: check for immediate versions and lower them.
7001 // Note: This is done during DAG combining instead of DAG legalizing because
7002 // the build_vectors for 64-bit vector element shift counts are generally
7003 // not legal, and it is hard to see their values after they get legalized to
7004 // loads from a constant pool.
7005 case Intrinsic::arm_neon_vshifts:
7006 case Intrinsic::arm_neon_vshiftu:
7007 case Intrinsic::arm_neon_vshiftls:
7008 case Intrinsic::arm_neon_vshiftlu:
7009 case Intrinsic::arm_neon_vshiftn:
7010 case Intrinsic::arm_neon_vrshifts:
7011 case Intrinsic::arm_neon_vrshiftu:
7012 case Intrinsic::arm_neon_vrshiftn:
7013 case Intrinsic::arm_neon_vqshifts:
7014 case Intrinsic::arm_neon_vqshiftu:
7015 case Intrinsic::arm_neon_vqshiftsu:
7016 case Intrinsic::arm_neon_vqshiftns:
7017 case Intrinsic::arm_neon_vqshiftnu:
7018 case Intrinsic::arm_neon_vqshiftnsu:
7019 case Intrinsic::arm_neon_vqrshiftns:
7020 case Intrinsic::arm_neon_vqrshiftnu:
7021 case Intrinsic::arm_neon_vqrshiftnsu: {
7022 EVT VT = N->getOperand(1).getValueType();
7024 unsigned VShiftOpc = 0;
7027 case Intrinsic::arm_neon_vshifts:
7028 case Intrinsic::arm_neon_vshiftu:
7029 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt)) {
7030 VShiftOpc = ARMISD::VSHL;
7033 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt)) {
7034 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshifts ?
7035 ARMISD::VSHRs : ARMISD::VSHRu);
7040 case Intrinsic::arm_neon_vshiftls:
7041 case Intrinsic::arm_neon_vshiftlu:
7042 if (isVShiftLImm(N->getOperand(2), VT, true, Cnt))
7044 llvm_unreachable("invalid shift count for vshll intrinsic");
7046 case Intrinsic::arm_neon_vrshifts:
7047 case Intrinsic::arm_neon_vrshiftu:
7048 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt))
7052 case Intrinsic::arm_neon_vqshifts:
7053 case Intrinsic::arm_neon_vqshiftu:
7054 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
7058 case Intrinsic::arm_neon_vqshiftsu:
7059 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
7061 llvm_unreachable("invalid shift count for vqshlu intrinsic");
7063 case Intrinsic::arm_neon_vshiftn:
7064 case Intrinsic::arm_neon_vrshiftn:
7065 case Intrinsic::arm_neon_vqshiftns:
7066 case Intrinsic::arm_neon_vqshiftnu:
7067 case Intrinsic::arm_neon_vqshiftnsu:
7068 case Intrinsic::arm_neon_vqrshiftns:
7069 case Intrinsic::arm_neon_vqrshiftnu:
7070 case Intrinsic::arm_neon_vqrshiftnsu:
7071 // Narrowing shifts require an immediate right shift.
7072 if (isVShiftRImm(N->getOperand(2), VT, true, true, Cnt))
7074 llvm_unreachable("invalid shift count for narrowing vector shift "
7078 llvm_unreachable("unhandled vector shift");
7082 case Intrinsic::arm_neon_vshifts:
7083 case Intrinsic::arm_neon_vshiftu:
7084 // Opcode already set above.
7086 case Intrinsic::arm_neon_vshiftls:
7087 case Intrinsic::arm_neon_vshiftlu:
7088 if (Cnt == VT.getVectorElementType().getSizeInBits())
7089 VShiftOpc = ARMISD::VSHLLi;
7091 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshiftls ?
7092 ARMISD::VSHLLs : ARMISD::VSHLLu);
7094 case Intrinsic::arm_neon_vshiftn:
7095 VShiftOpc = ARMISD::VSHRN; break;
7096 case Intrinsic::arm_neon_vrshifts:
7097 VShiftOpc = ARMISD::VRSHRs; break;
7098 case Intrinsic::arm_neon_vrshiftu:
7099 VShiftOpc = ARMISD::VRSHRu; break;
7100 case Intrinsic::arm_neon_vrshiftn:
7101 VShiftOpc = ARMISD::VRSHRN; break;
7102 case Intrinsic::arm_neon_vqshifts:
7103 VShiftOpc = ARMISD::VQSHLs; break;
7104 case Intrinsic::arm_neon_vqshiftu:
7105 VShiftOpc = ARMISD::VQSHLu; break;
7106 case Intrinsic::arm_neon_vqshiftsu:
7107 VShiftOpc = ARMISD::VQSHLsu; break;
7108 case Intrinsic::arm_neon_vqshiftns:
7109 VShiftOpc = ARMISD::VQSHRNs; break;
7110 case Intrinsic::arm_neon_vqshiftnu:
7111 VShiftOpc = ARMISD::VQSHRNu; break;
7112 case Intrinsic::arm_neon_vqshiftnsu:
7113 VShiftOpc = ARMISD::VQSHRNsu; break;
7114 case Intrinsic::arm_neon_vqrshiftns:
7115 VShiftOpc = ARMISD::VQRSHRNs; break;
7116 case Intrinsic::arm_neon_vqrshiftnu:
7117 VShiftOpc = ARMISD::VQRSHRNu; break;
7118 case Intrinsic::arm_neon_vqrshiftnsu:
7119 VShiftOpc = ARMISD::VQRSHRNsu; break;
7122 return DAG.getNode(VShiftOpc, N->getDebugLoc(), N->getValueType(0),
7123 N->getOperand(1), DAG.getConstant(Cnt, MVT::i32));
7126 case Intrinsic::arm_neon_vshiftins: {
7127 EVT VT = N->getOperand(1).getValueType();
7129 unsigned VShiftOpc = 0;
7131 if (isVShiftLImm(N->getOperand(3), VT, false, Cnt))
7132 VShiftOpc = ARMISD::VSLI;
7133 else if (isVShiftRImm(N->getOperand(3), VT, false, true, Cnt))
7134 VShiftOpc = ARMISD::VSRI;
7136 llvm_unreachable("invalid shift count for vsli/vsri intrinsic");
7139 return DAG.getNode(VShiftOpc, N->getDebugLoc(), N->getValueType(0),
7140 N->getOperand(1), N->getOperand(2),
7141 DAG.getConstant(Cnt, MVT::i32));
7144 case Intrinsic::arm_neon_vqrshifts:
7145 case Intrinsic::arm_neon_vqrshiftu:
7146 // No immediate versions of these to check for.
7153 /// PerformShiftCombine - Checks for immediate versions of vector shifts and
7154 /// lowers them. As with the vector shift intrinsics, this is done during DAG
7155 /// combining instead of DAG legalizing because the build_vectors for 64-bit
7156 /// vector element shift counts are generally not legal, and it is hard to see
7157 /// their values after they get legalized to loads from a constant pool.
7158 static SDValue PerformShiftCombine(SDNode *N, SelectionDAG &DAG,
7159 const ARMSubtarget *ST) {
7160 EVT VT = N->getValueType(0);
7162 // Nothing to be done for scalar shifts.
7163 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
7164 if (!VT.isVector() || !TLI.isTypeLegal(VT))
7167 assert(ST->hasNEON() && "unexpected vector shift");
7170 switch (N->getOpcode()) {
7171 default: llvm_unreachable("unexpected shift opcode");
7174 if (isVShiftLImm(N->getOperand(1), VT, false, Cnt))
7175 return DAG.getNode(ARMISD::VSHL, N->getDebugLoc(), VT, N->getOperand(0),
7176 DAG.getConstant(Cnt, MVT::i32));
7181 if (isVShiftRImm(N->getOperand(1), VT, false, false, Cnt)) {
7182 unsigned VShiftOpc = (N->getOpcode() == ISD::SRA ?
7183 ARMISD::VSHRs : ARMISD::VSHRu);
7184 return DAG.getNode(VShiftOpc, N->getDebugLoc(), VT, N->getOperand(0),
7185 DAG.getConstant(Cnt, MVT::i32));
7191 /// PerformExtendCombine - Target-specific DAG combining for ISD::SIGN_EXTEND,
7192 /// ISD::ZERO_EXTEND, and ISD::ANY_EXTEND.
7193 static SDValue PerformExtendCombine(SDNode *N, SelectionDAG &DAG,
7194 const ARMSubtarget *ST) {
7195 SDValue N0 = N->getOperand(0);
7197 // Check for sign- and zero-extensions of vector extract operations of 8-
7198 // and 16-bit vector elements. NEON supports these directly. They are
7199 // handled during DAG combining because type legalization will promote them
7200 // to 32-bit types and it is messy to recognize the operations after that.
7201 if (ST->hasNEON() && N0.getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
7202 SDValue Vec = N0.getOperand(0);
7203 SDValue Lane = N0.getOperand(1);
7204 EVT VT = N->getValueType(0);
7205 EVT EltVT = N0.getValueType();
7206 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
7208 if (VT == MVT::i32 &&
7209 (EltVT == MVT::i8 || EltVT == MVT::i16) &&
7210 TLI.isTypeLegal(Vec.getValueType()) &&
7211 isa<ConstantSDNode>(Lane)) {
7214 switch (N->getOpcode()) {
7215 default: llvm_unreachable("unexpected opcode");
7216 case ISD::SIGN_EXTEND:
7217 Opc = ARMISD::VGETLANEs;
7219 case ISD::ZERO_EXTEND:
7220 case ISD::ANY_EXTEND:
7221 Opc = ARMISD::VGETLANEu;
7224 return DAG.getNode(Opc, N->getDebugLoc(), VT, Vec, Lane);
7231 /// PerformSELECT_CCCombine - Target-specific DAG combining for ISD::SELECT_CC
7232 /// to match f32 max/min patterns to use NEON vmax/vmin instructions.
7233 static SDValue PerformSELECT_CCCombine(SDNode *N, SelectionDAG &DAG,
7234 const ARMSubtarget *ST) {
7235 // If the target supports NEON, try to use vmax/vmin instructions for f32
7236 // selects like "x < y ? x : y". Unless the NoNaNsFPMath option is set,
7237 // be careful about NaNs: NEON's vmax/vmin return NaN if either operand is
7238 // a NaN; only do the transformation when it matches that behavior.
7240 // For now only do this when using NEON for FP operations; if using VFP, it
7241 // is not obvious that the benefit outweighs the cost of switching to the
7243 if (!ST->hasNEON() || !ST->useNEONForSinglePrecisionFP() ||
7244 N->getValueType(0) != MVT::f32)
7247 SDValue CondLHS = N->getOperand(0);
7248 SDValue CondRHS = N->getOperand(1);
7249 SDValue LHS = N->getOperand(2);
7250 SDValue RHS = N->getOperand(3);
7251 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(4))->get();
7253 unsigned Opcode = 0;
7255 if (DAG.isEqualTo(LHS, CondLHS) && DAG.isEqualTo(RHS, CondRHS)) {
7256 IsReversed = false; // x CC y ? x : y
7257 } else if (DAG.isEqualTo(LHS, CondRHS) && DAG.isEqualTo(RHS, CondLHS)) {
7258 IsReversed = true ; // x CC y ? y : x
7272 // If LHS is NaN, an ordered comparison will be false and the result will
7273 // be the RHS, but vmin(NaN, RHS) = NaN. Avoid this by checking that LHS
7274 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
7275 IsUnordered = (CC == ISD::SETULT || CC == ISD::SETULE);
7276 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
7278 // For less-than-or-equal comparisons, "+0 <= -0" will be true but vmin
7279 // will return -0, so vmin can only be used for unsafe math or if one of
7280 // the operands is known to be nonzero.
7281 if ((CC == ISD::SETLE || CC == ISD::SETOLE || CC == ISD::SETULE) &&
7283 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
7285 Opcode = IsReversed ? ARMISD::FMAX : ARMISD::FMIN;
7294 // If LHS is NaN, an ordered comparison will be false and the result will
7295 // be the RHS, but vmax(NaN, RHS) = NaN. Avoid this by checking that LHS
7296 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
7297 IsUnordered = (CC == ISD::SETUGT || CC == ISD::SETUGE);
7298 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
7300 // For greater-than-or-equal comparisons, "-0 >= +0" will be true but vmax
7301 // will return +0, so vmax can only be used for unsafe math or if one of
7302 // the operands is known to be nonzero.
7303 if ((CC == ISD::SETGE || CC == ISD::SETOGE || CC == ISD::SETUGE) &&
7305 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
7307 Opcode = IsReversed ? ARMISD::FMIN : ARMISD::FMAX;
7313 return DAG.getNode(Opcode, N->getDebugLoc(), N->getValueType(0), LHS, RHS);
7316 /// PerformCMOVCombine - Target-specific DAG combining for ARMISD::CMOV.
7318 ARMTargetLowering::PerformCMOVCombine(SDNode *N, SelectionDAG &DAG) const {
7319 SDValue Cmp = N->getOperand(4);
7320 if (Cmp.getOpcode() != ARMISD::CMPZ)
7321 // Only looking at EQ and NE cases.
7324 EVT VT = N->getValueType(0);
7325 DebugLoc dl = N->getDebugLoc();
7326 SDValue LHS = Cmp.getOperand(0);
7327 SDValue RHS = Cmp.getOperand(1);
7328 SDValue FalseVal = N->getOperand(0);
7329 SDValue TrueVal = N->getOperand(1);
7330 SDValue ARMcc = N->getOperand(2);
7331 ARMCC::CondCodes CC =
7332 (ARMCC::CondCodes)cast<ConstantSDNode>(ARMcc)->getZExtValue();
7350 /// FIXME: Turn this into a target neutral optimization?
7352 if (CC == ARMCC::NE && FalseVal == RHS && FalseVal != LHS) {
7353 Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, TrueVal, ARMcc,
7354 N->getOperand(3), Cmp);
7355 } else if (CC == ARMCC::EQ && TrueVal == RHS) {
7357 SDValue NewCmp = getARMCmp(LHS, RHS, ISD::SETNE, ARMcc, DAG, dl);
7358 Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, FalseVal, ARMcc,
7359 N->getOperand(3), NewCmp);
7362 if (Res.getNode()) {
7363 APInt KnownZero, KnownOne;
7364 APInt Mask = APInt::getAllOnesValue(VT.getScalarType().getSizeInBits());
7365 DAG.ComputeMaskedBits(SDValue(N,0), Mask, KnownZero, KnownOne);
7366 // Capture demanded bits information that would be otherwise lost.
7367 if (KnownZero == 0xfffffffe)
7368 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
7369 DAG.getValueType(MVT::i1));
7370 else if (KnownZero == 0xffffff00)
7371 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
7372 DAG.getValueType(MVT::i8));
7373 else if (KnownZero == 0xffff0000)
7374 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
7375 DAG.getValueType(MVT::i16));
7381 SDValue ARMTargetLowering::PerformDAGCombine(SDNode *N,
7382 DAGCombinerInfo &DCI) const {
7383 switch (N->getOpcode()) {
7385 case ISD::ADD: return PerformADDCombine(N, DCI, Subtarget);
7386 case ISD::SUB: return PerformSUBCombine(N, DCI);
7387 case ISD::MUL: return PerformMULCombine(N, DCI, Subtarget);
7388 case ISD::OR: return PerformORCombine(N, DCI, Subtarget);
7389 case ISD::AND: return PerformANDCombine(N, DCI);
7390 case ARMISD::BFI: return PerformBFICombine(N, DCI);
7391 case ARMISD::VMOVRRD: return PerformVMOVRRDCombine(N, DCI);
7392 case ARMISD::VMOVDRR: return PerformVMOVDRRCombine(N, DCI.DAG);
7393 case ISD::STORE: return PerformSTORECombine(N, DCI);
7394 case ISD::BUILD_VECTOR: return PerformBUILD_VECTORCombine(N, DCI);
7395 case ISD::INSERT_VECTOR_ELT: return PerformInsertEltCombine(N, DCI);
7396 case ISD::VECTOR_SHUFFLE: return PerformVECTOR_SHUFFLECombine(N, DCI.DAG);
7397 case ARMISD::VDUPLANE: return PerformVDUPLANECombine(N, DCI);
7398 case ISD::FP_TO_SINT:
7399 case ISD::FP_TO_UINT: return PerformVCVTCombine(N, DCI, Subtarget);
7400 case ISD::FDIV: return PerformVDIVCombine(N, DCI, Subtarget);
7401 case ISD::INTRINSIC_WO_CHAIN: return PerformIntrinsicCombine(N, DCI.DAG);
7404 case ISD::SRL: return PerformShiftCombine(N, DCI.DAG, Subtarget);
7405 case ISD::SIGN_EXTEND:
7406 case ISD::ZERO_EXTEND:
7407 case ISD::ANY_EXTEND: return PerformExtendCombine(N, DCI.DAG, Subtarget);
7408 case ISD::SELECT_CC: return PerformSELECT_CCCombine(N, DCI.DAG, Subtarget);
7409 case ARMISD::CMOV: return PerformCMOVCombine(N, DCI.DAG);
7410 case ARMISD::VLD2DUP:
7411 case ARMISD::VLD3DUP:
7412 case ARMISD::VLD4DUP:
7413 return CombineBaseUpdate(N, DCI);
7414 case ISD::INTRINSIC_VOID:
7415 case ISD::INTRINSIC_W_CHAIN:
7416 switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
7417 case Intrinsic::arm_neon_vld1:
7418 case Intrinsic::arm_neon_vld2:
7419 case Intrinsic::arm_neon_vld3:
7420 case Intrinsic::arm_neon_vld4:
7421 case Intrinsic::arm_neon_vld2lane:
7422 case Intrinsic::arm_neon_vld3lane:
7423 case Intrinsic::arm_neon_vld4lane:
7424 case Intrinsic::arm_neon_vst1:
7425 case Intrinsic::arm_neon_vst2:
7426 case Intrinsic::arm_neon_vst3:
7427 case Intrinsic::arm_neon_vst4:
7428 case Intrinsic::arm_neon_vst2lane:
7429 case Intrinsic::arm_neon_vst3lane:
7430 case Intrinsic::arm_neon_vst4lane:
7431 return CombineBaseUpdate(N, DCI);
7439 bool ARMTargetLowering::isDesirableToTransformToIntegerOp(unsigned Opc,
7441 return (VT == MVT::f32) && (Opc == ISD::LOAD || Opc == ISD::STORE);
7444 bool ARMTargetLowering::allowsUnalignedMemoryAccesses(EVT VT) const {
7445 if (!Subtarget->allowsUnalignedMem())
7448 switch (VT.getSimpleVT().SimpleTy) {
7455 // FIXME: VLD1 etc with standard alignment is legal.
7459 static bool isLegalT1AddressImmediate(int64_t V, EVT VT) {
7464 switch (VT.getSimpleVT().SimpleTy) {
7465 default: return false;
7480 if ((V & (Scale - 1)) != 0)
7483 return V == (V & ((1LL << 5) - 1));
7486 static bool isLegalT2AddressImmediate(int64_t V, EVT VT,
7487 const ARMSubtarget *Subtarget) {
7494 switch (VT.getSimpleVT().SimpleTy) {
7495 default: return false;
7500 // + imm12 or - imm8
7502 return V == (V & ((1LL << 8) - 1));
7503 return V == (V & ((1LL << 12) - 1));
7506 // Same as ARM mode. FIXME: NEON?
7507 if (!Subtarget->hasVFP2())
7512 return V == (V & ((1LL << 8) - 1));
7516 /// isLegalAddressImmediate - Return true if the integer value can be used
7517 /// as the offset of the target addressing mode for load / store of the
7519 static bool isLegalAddressImmediate(int64_t V, EVT VT,
7520 const ARMSubtarget *Subtarget) {
7527 if (Subtarget->isThumb1Only())
7528 return isLegalT1AddressImmediate(V, VT);
7529 else if (Subtarget->isThumb2())
7530 return isLegalT2AddressImmediate(V, VT, Subtarget);
7535 switch (VT.getSimpleVT().SimpleTy) {
7536 default: return false;
7541 return V == (V & ((1LL << 12) - 1));
7544 return V == (V & ((1LL << 8) - 1));
7547 if (!Subtarget->hasVFP2()) // FIXME: NEON?
7552 return V == (V & ((1LL << 8) - 1));
7556 bool ARMTargetLowering::isLegalT2ScaledAddressingMode(const AddrMode &AM,
7558 int Scale = AM.Scale;
7562 switch (VT.getSimpleVT().SimpleTy) {
7563 default: return false;
7572 return Scale == 2 || Scale == 4 || Scale == 8;
7575 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
7579 // Note, we allow "void" uses (basically, uses that aren't loads or
7580 // stores), because arm allows folding a scale into many arithmetic
7581 // operations. This should be made more precise and revisited later.
7583 // Allow r << imm, but the imm has to be a multiple of two.
7584 if (Scale & 1) return false;
7585 return isPowerOf2_32(Scale);
7589 /// isLegalAddressingMode - Return true if the addressing mode represented
7590 /// by AM is legal for this target, for a load/store of the specified type.
7591 bool ARMTargetLowering::isLegalAddressingMode(const AddrMode &AM,
7593 EVT VT = getValueType(Ty, true);
7594 if (!isLegalAddressImmediate(AM.BaseOffs, VT, Subtarget))
7597 // Can never fold addr of global into load/store.
7602 case 0: // no scale reg, must be "r+i" or "r", or "i".
7605 if (Subtarget->isThumb1Only())
7609 // ARM doesn't support any R+R*scale+imm addr modes.
7616 if (Subtarget->isThumb2())
7617 return isLegalT2ScaledAddressingMode(AM, VT);
7619 int Scale = AM.Scale;
7620 switch (VT.getSimpleVT().SimpleTy) {
7621 default: return false;
7625 if (Scale < 0) Scale = -Scale;
7629 return isPowerOf2_32(Scale & ~1);
7633 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
7638 // Note, we allow "void" uses (basically, uses that aren't loads or
7639 // stores), because arm allows folding a scale into many arithmetic
7640 // operations. This should be made more precise and revisited later.
7642 // Allow r << imm, but the imm has to be a multiple of two.
7643 if (Scale & 1) return false;
7644 return isPowerOf2_32(Scale);
7651 /// isLegalICmpImmediate - Return true if the specified immediate is legal
7652 /// icmp immediate, that is the target has icmp instructions which can compare
7653 /// a register against the immediate without having to materialize the
7654 /// immediate into a register.
7655 bool ARMTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
7656 if (!Subtarget->isThumb())
7657 return ARM_AM::getSOImmVal(Imm) != -1;
7658 if (Subtarget->isThumb2())
7659 return ARM_AM::getT2SOImmVal(Imm) != -1;
7660 return Imm >= 0 && Imm <= 255;
7663 /// isLegalAddImmediate - Return true if the specified immediate is legal
7664 /// add immediate, that is the target has add instructions which can add
7665 /// a register with the immediate without having to materialize the
7666 /// immediate into a register.
7667 bool ARMTargetLowering::isLegalAddImmediate(int64_t Imm) const {
7668 return ARM_AM::getSOImmVal(Imm) != -1;
7671 static bool getARMIndexedAddressParts(SDNode *Ptr, EVT VT,
7672 bool isSEXTLoad, SDValue &Base,
7673 SDValue &Offset, bool &isInc,
7674 SelectionDAG &DAG) {
7675 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
7678 if (VT == MVT::i16 || ((VT == MVT::i8 || VT == MVT::i1) && isSEXTLoad)) {
7680 Base = Ptr->getOperand(0);
7681 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
7682 int RHSC = (int)RHS->getZExtValue();
7683 if (RHSC < 0 && RHSC > -256) {
7684 assert(Ptr->getOpcode() == ISD::ADD);
7686 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
7690 isInc = (Ptr->getOpcode() == ISD::ADD);
7691 Offset = Ptr->getOperand(1);
7693 } else if (VT == MVT::i32 || VT == MVT::i8 || VT == MVT::i1) {
7695 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
7696 int RHSC = (int)RHS->getZExtValue();
7697 if (RHSC < 0 && RHSC > -0x1000) {
7698 assert(Ptr->getOpcode() == ISD::ADD);
7700 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
7701 Base = Ptr->getOperand(0);
7706 if (Ptr->getOpcode() == ISD::ADD) {
7708 ARM_AM::ShiftOpc ShOpcVal=
7709 ARM_AM::getShiftOpcForNode(Ptr->getOperand(0).getOpcode());
7710 if (ShOpcVal != ARM_AM::no_shift) {
7711 Base = Ptr->getOperand(1);
7712 Offset = Ptr->getOperand(0);
7714 Base = Ptr->getOperand(0);
7715 Offset = Ptr->getOperand(1);
7720 isInc = (Ptr->getOpcode() == ISD::ADD);
7721 Base = Ptr->getOperand(0);
7722 Offset = Ptr->getOperand(1);
7726 // FIXME: Use VLDM / VSTM to emulate indexed FP load / store.
7730 static bool getT2IndexedAddressParts(SDNode *Ptr, EVT VT,
7731 bool isSEXTLoad, SDValue &Base,
7732 SDValue &Offset, bool &isInc,
7733 SelectionDAG &DAG) {
7734 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
7737 Base = Ptr->getOperand(0);
7738 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
7739 int RHSC = (int)RHS->getZExtValue();
7740 if (RHSC < 0 && RHSC > -0x100) { // 8 bits.
7741 assert(Ptr->getOpcode() == ISD::ADD);
7743 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
7745 } else if (RHSC > 0 && RHSC < 0x100) { // 8 bit, no zero.
7746 isInc = Ptr->getOpcode() == ISD::ADD;
7747 Offset = DAG.getConstant(RHSC, RHS->getValueType(0));
7755 /// getPreIndexedAddressParts - returns true by value, base pointer and
7756 /// offset pointer and addressing mode by reference if the node's address
7757 /// can be legally represented as pre-indexed load / store address.
7759 ARMTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base,
7761 ISD::MemIndexedMode &AM,
7762 SelectionDAG &DAG) const {
7763 if (Subtarget->isThumb1Only())
7768 bool isSEXTLoad = false;
7769 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
7770 Ptr = LD->getBasePtr();
7771 VT = LD->getMemoryVT();
7772 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
7773 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
7774 Ptr = ST->getBasePtr();
7775 VT = ST->getMemoryVT();
7780 bool isLegal = false;
7781 if (Subtarget->isThumb2())
7782 isLegal = getT2IndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
7783 Offset, isInc, DAG);
7785 isLegal = getARMIndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
7786 Offset, isInc, DAG);
7790 AM = isInc ? ISD::PRE_INC : ISD::PRE_DEC;
7794 /// getPostIndexedAddressParts - returns true by value, base pointer and
7795 /// offset pointer and addressing mode by reference if this node can be
7796 /// combined with a load / store to form a post-indexed load / store.
7797 bool ARMTargetLowering::getPostIndexedAddressParts(SDNode *N, SDNode *Op,
7800 ISD::MemIndexedMode &AM,
7801 SelectionDAG &DAG) const {
7802 if (Subtarget->isThumb1Only())
7807 bool isSEXTLoad = false;
7808 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
7809 VT = LD->getMemoryVT();
7810 Ptr = LD->getBasePtr();
7811 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
7812 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
7813 VT = ST->getMemoryVT();
7814 Ptr = ST->getBasePtr();
7819 bool isLegal = false;
7820 if (Subtarget->isThumb2())
7821 isLegal = getT2IndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
7824 isLegal = getARMIndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
7830 // Swap base ptr and offset to catch more post-index load / store when
7831 // it's legal. In Thumb2 mode, offset must be an immediate.
7832 if (Ptr == Offset && Op->getOpcode() == ISD::ADD &&
7833 !Subtarget->isThumb2())
7834 std::swap(Base, Offset);
7836 // Post-indexed load / store update the base pointer.
7841 AM = isInc ? ISD::POST_INC : ISD::POST_DEC;
7845 void ARMTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
7849 const SelectionDAG &DAG,
7850 unsigned Depth) const {
7851 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0);
7852 switch (Op.getOpcode()) {
7854 case ARMISD::CMOV: {
7855 // Bits are known zero/one if known on the LHS and RHS.
7856 DAG.ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero, KnownOne, Depth+1);
7857 if (KnownZero == 0 && KnownOne == 0) return;
7859 APInt KnownZeroRHS, KnownOneRHS;
7860 DAG.ComputeMaskedBits(Op.getOperand(1), Mask,
7861 KnownZeroRHS, KnownOneRHS, Depth+1);
7862 KnownZero &= KnownZeroRHS;
7863 KnownOne &= KnownOneRHS;
7869 //===----------------------------------------------------------------------===//
7870 // ARM Inline Assembly Support
7871 //===----------------------------------------------------------------------===//
7873 bool ARMTargetLowering::ExpandInlineAsm(CallInst *CI) const {
7874 // Looking for "rev" which is V6+.
7875 if (!Subtarget->hasV6Ops())
7878 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
7879 std::string AsmStr = IA->getAsmString();
7880 SmallVector<StringRef, 4> AsmPieces;
7881 SplitString(AsmStr, AsmPieces, ";\n");
7883 switch (AsmPieces.size()) {
7884 default: return false;
7886 AsmStr = AsmPieces[0];
7888 SplitString(AsmStr, AsmPieces, " \t,");
7891 if (AsmPieces.size() == 3 &&
7892 AsmPieces[0] == "rev" && AsmPieces[1] == "$0" && AsmPieces[2] == "$1" &&
7893 IA->getConstraintString().compare(0, 4, "=l,l") == 0) {
7894 IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
7895 if (Ty && Ty->getBitWidth() == 32)
7896 return IntrinsicLowering::LowerToByteSwap(CI);
7904 /// getConstraintType - Given a constraint letter, return the type of
7905 /// constraint it is for this target.
7906 ARMTargetLowering::ConstraintType
7907 ARMTargetLowering::getConstraintType(const std::string &Constraint) const {
7908 if (Constraint.size() == 1) {
7909 switch (Constraint[0]) {
7911 case 'l': return C_RegisterClass;
7912 case 'w': return C_RegisterClass;
7913 case 'h': return C_RegisterClass;
7914 case 'x': return C_RegisterClass;
7915 case 't': return C_RegisterClass;
7916 case 'j': return C_Other; // Constant for movw.
7917 // An address with a single base register. Due to the way we
7918 // currently handle addresses it is the same as an 'r' memory constraint.
7919 case 'Q': return C_Memory;
7921 } else if (Constraint.size() == 2) {
7922 switch (Constraint[0]) {
7924 // All 'U+' constraints are addresses.
7925 case 'U': return C_Memory;
7928 return TargetLowering::getConstraintType(Constraint);
7931 /// Examine constraint type and operand type and determine a weight value.
7932 /// This object must already have been set up with the operand type
7933 /// and the current alternative constraint selected.
7934 TargetLowering::ConstraintWeight
7935 ARMTargetLowering::getSingleConstraintMatchWeight(
7936 AsmOperandInfo &info, const char *constraint) const {
7937 ConstraintWeight weight = CW_Invalid;
7938 Value *CallOperandVal = info.CallOperandVal;
7939 // If we don't have a value, we can't do a match,
7940 // but allow it at the lowest weight.
7941 if (CallOperandVal == NULL)
7943 Type *type = CallOperandVal->getType();
7944 // Look at the constraint type.
7945 switch (*constraint) {
7947 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
7950 if (type->isIntegerTy()) {
7951 if (Subtarget->isThumb())
7952 weight = CW_SpecificReg;
7954 weight = CW_Register;
7958 if (type->isFloatingPointTy())
7959 weight = CW_Register;
7965 typedef std::pair<unsigned, const TargetRegisterClass*> RCPair;
7967 ARMTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
7969 if (Constraint.size() == 1) {
7970 // GCC ARM Constraint Letters
7971 switch (Constraint[0]) {
7972 case 'l': // Low regs or general regs.
7973 if (Subtarget->isThumb())
7974 return RCPair(0U, ARM::tGPRRegisterClass);
7976 return RCPair(0U, ARM::GPRRegisterClass);
7977 case 'h': // High regs or no regs.
7978 if (Subtarget->isThumb())
7979 return RCPair(0U, ARM::hGPRRegisterClass);
7982 return RCPair(0U, ARM::GPRRegisterClass);
7985 return RCPair(0U, ARM::SPRRegisterClass);
7986 if (VT.getSizeInBits() == 64)
7987 return RCPair(0U, ARM::DPRRegisterClass);
7988 if (VT.getSizeInBits() == 128)
7989 return RCPair(0U, ARM::QPRRegisterClass);
7993 return RCPair(0U, ARM::SPR_8RegisterClass);
7994 if (VT.getSizeInBits() == 64)
7995 return RCPair(0U, ARM::DPR_8RegisterClass);
7996 if (VT.getSizeInBits() == 128)
7997 return RCPair(0U, ARM::QPR_8RegisterClass);
8001 return RCPair(0U, ARM::SPRRegisterClass);
8005 if (StringRef("{cc}").equals_lower(Constraint))
8006 return std::make_pair(unsigned(ARM::CPSR), ARM::CCRRegisterClass);
8008 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
8011 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
8012 /// vector. If it is invalid, don't add anything to Ops.
8013 void ARMTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
8014 std::string &Constraint,
8015 std::vector<SDValue>&Ops,
8016 SelectionDAG &DAG) const {
8017 SDValue Result(0, 0);
8019 // Currently only support length 1 constraints.
8020 if (Constraint.length() != 1) return;
8022 char ConstraintLetter = Constraint[0];
8023 switch (ConstraintLetter) {
8026 case 'I': case 'J': case 'K': case 'L':
8027 case 'M': case 'N': case 'O':
8028 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
8032 int64_t CVal64 = C->getSExtValue();
8033 int CVal = (int) CVal64;
8034 // None of these constraints allow values larger than 32 bits. Check
8035 // that the value fits in an int.
8039 switch (ConstraintLetter) {
8041 // Constant suitable for movw, must be between 0 and
8043 if (Subtarget->hasV6T2Ops())
8044 if (CVal >= 0 && CVal <= 65535)
8048 if (Subtarget->isThumb1Only()) {
8049 // This must be a constant between 0 and 255, for ADD
8051 if (CVal >= 0 && CVal <= 255)
8053 } else if (Subtarget->isThumb2()) {
8054 // A constant that can be used as an immediate value in a
8055 // data-processing instruction.
8056 if (ARM_AM::getT2SOImmVal(CVal) != -1)
8059 // A constant that can be used as an immediate value in a
8060 // data-processing instruction.
8061 if (ARM_AM::getSOImmVal(CVal) != -1)
8067 if (Subtarget->isThumb()) { // FIXME thumb2
8068 // This must be a constant between -255 and -1, for negated ADD
8069 // immediates. This can be used in GCC with an "n" modifier that
8070 // prints the negated value, for use with SUB instructions. It is
8071 // not useful otherwise but is implemented for compatibility.
8072 if (CVal >= -255 && CVal <= -1)
8075 // This must be a constant between -4095 and 4095. It is not clear
8076 // what this constraint is intended for. Implemented for
8077 // compatibility with GCC.
8078 if (CVal >= -4095 && CVal <= 4095)
8084 if (Subtarget->isThumb1Only()) {
8085 // A 32-bit value where only one byte has a nonzero value. Exclude
8086 // zero to match GCC. This constraint is used by GCC internally for
8087 // constants that can be loaded with a move/shift combination.
8088 // It is not useful otherwise but is implemented for compatibility.
8089 if (CVal != 0 && ARM_AM::isThumbImmShiftedVal(CVal))
8091 } else if (Subtarget->isThumb2()) {
8092 // A constant whose bitwise inverse can be used as an immediate
8093 // value in a data-processing instruction. This can be used in GCC
8094 // with a "B" modifier that prints the inverted value, for use with
8095 // BIC and MVN instructions. It is not useful otherwise but is
8096 // implemented for compatibility.
8097 if (ARM_AM::getT2SOImmVal(~CVal) != -1)
8100 // A constant whose bitwise inverse can be used as an immediate
8101 // value in a data-processing instruction. This can be used in GCC
8102 // with a "B" modifier that prints the inverted value, for use with
8103 // BIC and MVN instructions. It is not useful otherwise but is
8104 // implemented for compatibility.
8105 if (ARM_AM::getSOImmVal(~CVal) != -1)
8111 if (Subtarget->isThumb1Only()) {
8112 // This must be a constant between -7 and 7,
8113 // for 3-operand ADD/SUB immediate instructions.
8114 if (CVal >= -7 && CVal < 7)
8116 } else if (Subtarget->isThumb2()) {
8117 // A constant whose negation can be used as an immediate value in a
8118 // data-processing instruction. This can be used in GCC with an "n"
8119 // modifier that prints the negated value, for use with SUB
8120 // instructions. It is not useful otherwise but is implemented for
8122 if (ARM_AM::getT2SOImmVal(-CVal) != -1)
8125 // A constant whose negation can be used as an immediate value in a
8126 // data-processing instruction. This can be used in GCC with an "n"
8127 // modifier that prints the negated value, for use with SUB
8128 // instructions. It is not useful otherwise but is implemented for
8130 if (ARM_AM::getSOImmVal(-CVal) != -1)
8136 if (Subtarget->isThumb()) { // FIXME thumb2
8137 // This must be a multiple of 4 between 0 and 1020, for
8138 // ADD sp + immediate.
8139 if ((CVal >= 0 && CVal <= 1020) && ((CVal & 3) == 0))
8142 // A power of two or a constant between 0 and 32. This is used in
8143 // GCC for the shift amount on shifted register operands, but it is
8144 // useful in general for any shift amounts.
8145 if ((CVal >= 0 && CVal <= 32) || ((CVal & (CVal - 1)) == 0))
8151 if (Subtarget->isThumb()) { // FIXME thumb2
8152 // This must be a constant between 0 and 31, for shift amounts.
8153 if (CVal >= 0 && CVal <= 31)
8159 if (Subtarget->isThumb()) { // FIXME thumb2
8160 // This must be a multiple of 4 between -508 and 508, for
8161 // ADD/SUB sp = sp + immediate.
8162 if ((CVal >= -508 && CVal <= 508) && ((CVal & 3) == 0))
8167 Result = DAG.getTargetConstant(CVal, Op.getValueType());
8171 if (Result.getNode()) {
8172 Ops.push_back(Result);
8175 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
8179 ARMTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
8180 // The ARM target isn't yet aware of offsets.
8184 bool ARM::isBitFieldInvertedMask(unsigned v) {
8185 if (v == 0xffffffff)
8187 // there can be 1's on either or both "outsides", all the "inside"
8189 unsigned int lsb = 0, msb = 31;
8190 while (v & (1 << msb)) --msb;
8191 while (v & (1 << lsb)) ++lsb;
8192 for (unsigned int i = lsb; i <= msb; ++i) {
8199 /// isFPImmLegal - Returns true if the target can instruction select the
8200 /// specified FP immediate natively. If false, the legalizer will
8201 /// materialize the FP immediate as a load from a constant pool.
8202 bool ARMTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
8203 if (!Subtarget->hasVFP3())
8206 return ARM_AM::getFP32Imm(Imm) != -1;
8208 return ARM_AM::getFP64Imm(Imm) != -1;
8212 /// getTgtMemIntrinsic - Represent NEON load and store intrinsics as
8213 /// MemIntrinsicNodes. The associated MachineMemOperands record the alignment
8214 /// specified in the intrinsic calls.
8215 bool ARMTargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info,
8217 unsigned Intrinsic) const {
8218 switch (Intrinsic) {
8219 case Intrinsic::arm_neon_vld1:
8220 case Intrinsic::arm_neon_vld2:
8221 case Intrinsic::arm_neon_vld3:
8222 case Intrinsic::arm_neon_vld4:
8223 case Intrinsic::arm_neon_vld2lane:
8224 case Intrinsic::arm_neon_vld3lane:
8225 case Intrinsic::arm_neon_vld4lane: {
8226 Info.opc = ISD::INTRINSIC_W_CHAIN;
8227 // Conservatively set memVT to the entire set of vectors loaded.
8228 uint64_t NumElts = getTargetData()->getTypeAllocSize(I.getType()) / 8;
8229 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
8230 Info.ptrVal = I.getArgOperand(0);
8232 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
8233 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
8234 Info.vol = false; // volatile loads with NEON intrinsics not supported
8235 Info.readMem = true;
8236 Info.writeMem = false;
8239 case Intrinsic::arm_neon_vst1:
8240 case Intrinsic::arm_neon_vst2:
8241 case Intrinsic::arm_neon_vst3:
8242 case Intrinsic::arm_neon_vst4:
8243 case Intrinsic::arm_neon_vst2lane:
8244 case Intrinsic::arm_neon_vst3lane:
8245 case Intrinsic::arm_neon_vst4lane: {
8246 Info.opc = ISD::INTRINSIC_VOID;
8247 // Conservatively set memVT to the entire set of vectors stored.
8248 unsigned NumElts = 0;
8249 for (unsigned ArgI = 1, ArgE = I.getNumArgOperands(); ArgI < ArgE; ++ArgI) {
8250 Type *ArgTy = I.getArgOperand(ArgI)->getType();
8251 if (!ArgTy->isVectorTy())
8253 NumElts += getTargetData()->getTypeAllocSize(ArgTy) / 8;
8255 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
8256 Info.ptrVal = I.getArgOperand(0);
8258 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
8259 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
8260 Info.vol = false; // volatile stores with NEON intrinsics not supported
8261 Info.readMem = false;
8262 Info.writeMem = true;
8265 case Intrinsic::arm_strexd: {
8266 Info.opc = ISD::INTRINSIC_W_CHAIN;
8267 Info.memVT = MVT::i64;
8268 Info.ptrVal = I.getArgOperand(2);
8272 Info.readMem = false;
8273 Info.writeMem = true;
8276 case Intrinsic::arm_ldrexd: {
8277 Info.opc = ISD::INTRINSIC_W_CHAIN;
8278 Info.memVT = MVT::i64;
8279 Info.ptrVal = I.getArgOperand(0);
8283 Info.readMem = true;
8284 Info.writeMem = false;