Bug Summary

File:build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp
Warning:line 3305, column 20
1st function call argument is an uninitialized value

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name ARMISelDAGToDAG.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins -resource-dir /usr/lib/llvm-15/lib/clang/15.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I lib/Target/ARM -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/Target/ARM -I include -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/include -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-15/lib/clang/15.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -O3 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -ferror-limit 19 -fvisibility hidden -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2022-04-20-140412-16051-1 -x c++ /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp
1//===-- ARMISelDAGToDAG.cpp - A dag to dag inst selector for ARM ----------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file defines an instruction selector for the ARM target.
10//
11//===----------------------------------------------------------------------===//
12
13#include "ARM.h"
14#include "ARMBaseInstrInfo.h"
15#include "ARMTargetMachine.h"
16#include "MCTargetDesc/ARMAddressingModes.h"
17#include "Utils/ARMBaseInfo.h"
18#include "llvm/ADT/APSInt.h"
19#include "llvm/ADT/StringSwitch.h"
20#include "llvm/CodeGen/MachineFrameInfo.h"
21#include "llvm/CodeGen/MachineFunction.h"
22#include "llvm/CodeGen/MachineInstrBuilder.h"
23#include "llvm/CodeGen/MachineRegisterInfo.h"
24#include "llvm/CodeGen/SelectionDAG.h"
25#include "llvm/CodeGen/SelectionDAGISel.h"
26#include "llvm/CodeGen/TargetLowering.h"
27#include "llvm/IR/CallingConv.h"
28#include "llvm/IR/Constants.h"
29#include "llvm/IR/DerivedTypes.h"
30#include "llvm/IR/Function.h"
31#include "llvm/IR/Intrinsics.h"
32#include "llvm/IR/IntrinsicsARM.h"
33#include "llvm/IR/LLVMContext.h"
34#include "llvm/Support/CommandLine.h"
35#include "llvm/Support/Debug.h"
36#include "llvm/Support/ErrorHandling.h"
37#include "llvm/Target/TargetOptions.h"
38
39using namespace llvm;
40
41#define DEBUG_TYPE"arm-isel" "arm-isel"
42
43static cl::opt<bool>
44DisableShifterOp("disable-shifter-op", cl::Hidden,
45 cl::desc("Disable isel of shifter-op"),
46 cl::init(false));
47
48//===--------------------------------------------------------------------===//
49/// ARMDAGToDAGISel - ARM specific code to select ARM machine
50/// instructions for SelectionDAG operations.
51///
52namespace {
53
54class ARMDAGToDAGISel : public SelectionDAGISel {
55 /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can
56 /// make the right decision when generating code for different targets.
57 const ARMSubtarget *Subtarget;
58
59public:
60 explicit ARMDAGToDAGISel(ARMBaseTargetMachine &tm, CodeGenOpt::Level OptLevel)
61 : SelectionDAGISel(tm, OptLevel) {}
62
63 bool runOnMachineFunction(MachineFunction &MF) override {
64 // Reset the subtarget each time through.
65 Subtarget = &MF.getSubtarget<ARMSubtarget>();
66 SelectionDAGISel::runOnMachineFunction(MF);
67 return true;
68 }
69
70 StringRef getPassName() const override { return "ARM Instruction Selection"; }
71
72 void PreprocessISelDAG() override;
73
74 /// getI32Imm - Return a target constant of type i32 with the specified
75 /// value.
76 inline SDValue getI32Imm(unsigned Imm, const SDLoc &dl) {
77 return CurDAG->getTargetConstant(Imm, dl, MVT::i32);
78 }
79
80 void Select(SDNode *N) override;
81
82 /// Return true as some complex patterns, like those that call
83 /// canExtractShiftFromMul can modify the DAG inplace.
84 bool ComplexPatternFuncMutatesDAG() const override { return true; }
85
86 bool hasNoVMLxHazardUse(SDNode *N) const;
87 bool isShifterOpProfitable(const SDValue &Shift,
88 ARM_AM::ShiftOpc ShOpcVal, unsigned ShAmt);
89 bool SelectRegShifterOperand(SDValue N, SDValue &A,
90 SDValue &B, SDValue &C,
91 bool CheckProfitability = true);
92 bool SelectImmShifterOperand(SDValue N, SDValue &A,
93 SDValue &B, bool CheckProfitability = true);
94 bool SelectShiftRegShifterOperand(SDValue N, SDValue &A, SDValue &B,
95 SDValue &C) {
96 // Don't apply the profitability check
97 return SelectRegShifterOperand(N, A, B, C, false);
98 }
99 bool SelectShiftImmShifterOperand(SDValue N, SDValue &A, SDValue &B) {
100 // Don't apply the profitability check
101 return SelectImmShifterOperand(N, A, B, false);
102 }
103 bool SelectShiftImmShifterOperandOneUse(SDValue N, SDValue &A, SDValue &B) {
104 if (!N.hasOneUse())
105 return false;
106 return SelectImmShifterOperand(N, A, B, false);
107 }
108
109 bool SelectAddLikeOr(SDNode *Parent, SDValue N, SDValue &Out);
110
111 bool SelectAddrModeImm12(SDValue N, SDValue &Base, SDValue &OffImm);
112 bool SelectLdStSOReg(SDValue N, SDValue &Base, SDValue &Offset, SDValue &Opc);
113
114 bool SelectCMOVPred(SDValue N, SDValue &Pred, SDValue &Reg) {
115 const ConstantSDNode *CN = cast<ConstantSDNode>(N);
116 Pred = CurDAG->getTargetConstant(CN->getZExtValue(), SDLoc(N), MVT::i32);
117 Reg = CurDAG->getRegister(ARM::CPSR, MVT::i32);
118 return true;
119 }
120
121 bool SelectAddrMode2OffsetReg(SDNode *Op, SDValue N,
122 SDValue &Offset, SDValue &Opc);
123 bool SelectAddrMode2OffsetImm(SDNode *Op, SDValue N,
124 SDValue &Offset, SDValue &Opc);
125 bool SelectAddrMode2OffsetImmPre(SDNode *Op, SDValue N,
126 SDValue &Offset, SDValue &Opc);
127 bool SelectAddrOffsetNone(SDValue N, SDValue &Base);
128 bool SelectAddrMode3(SDValue N, SDValue &Base,
129 SDValue &Offset, SDValue &Opc);
130 bool SelectAddrMode3Offset(SDNode *Op, SDValue N,
131 SDValue &Offset, SDValue &Opc);
132 bool IsAddressingMode5(SDValue N, SDValue &Base, SDValue &Offset, bool FP16);
133 bool SelectAddrMode5(SDValue N, SDValue &Base, SDValue &Offset);
134 bool SelectAddrMode5FP16(SDValue N, SDValue &Base, SDValue &Offset);
135 bool SelectAddrMode6(SDNode *Parent, SDValue N, SDValue &Addr,SDValue &Align);
136 bool SelectAddrMode6Offset(SDNode *Op, SDValue N, SDValue &Offset);
137
138 bool SelectAddrModePC(SDValue N, SDValue &Offset, SDValue &Label);
139
140 // Thumb Addressing Modes:
141 bool SelectThumbAddrModeRR(SDValue N, SDValue &Base, SDValue &Offset);
142 bool SelectThumbAddrModeRRSext(SDValue N, SDValue &Base, SDValue &Offset);
143 bool SelectThumbAddrModeImm5S(SDValue N, unsigned Scale, SDValue &Base,
144 SDValue &OffImm);
145 bool SelectThumbAddrModeImm5S1(SDValue N, SDValue &Base,
146 SDValue &OffImm);
147 bool SelectThumbAddrModeImm5S2(SDValue N, SDValue &Base,
148 SDValue &OffImm);
149 bool SelectThumbAddrModeImm5S4(SDValue N, SDValue &Base,
150 SDValue &OffImm);
151 bool SelectThumbAddrModeSP(SDValue N, SDValue &Base, SDValue &OffImm);
152 template <unsigned Shift>
153 bool SelectTAddrModeImm7(SDValue N, SDValue &Base, SDValue &OffImm);
154
155 // Thumb 2 Addressing Modes:
156 bool SelectT2AddrModeImm12(SDValue N, SDValue &Base, SDValue &OffImm);
157 template <unsigned Shift>
158 bool SelectT2AddrModeImm8(SDValue N, SDValue &Base, SDValue &OffImm);
159 bool SelectT2AddrModeImm8(SDValue N, SDValue &Base,
160 SDValue &OffImm);
161 bool SelectT2AddrModeImm8Offset(SDNode *Op, SDValue N,
162 SDValue &OffImm);
163 template <unsigned Shift>
164 bool SelectT2AddrModeImm7Offset(SDNode *Op, SDValue N, SDValue &OffImm);
165 bool SelectT2AddrModeImm7Offset(SDNode *Op, SDValue N, SDValue &OffImm,
166 unsigned Shift);
167 template <unsigned Shift>
168 bool SelectT2AddrModeImm7(SDValue N, SDValue &Base, SDValue &OffImm);
169 bool SelectT2AddrModeSoReg(SDValue N, SDValue &Base,
170 SDValue &OffReg, SDValue &ShImm);
171 bool SelectT2AddrModeExclusive(SDValue N, SDValue &Base, SDValue &OffImm);
172
173 template<int Min, int Max>
174 bool SelectImmediateInRange(SDValue N, SDValue &OffImm);
175
176 inline bool is_so_imm(unsigned Imm) const {
177 return ARM_AM::getSOImmVal(Imm) != -1;
178 }
179
180 inline bool is_so_imm_not(unsigned Imm) const {
181 return ARM_AM::getSOImmVal(~Imm) != -1;
182 }
183
184 inline bool is_t2_so_imm(unsigned Imm) const {
185 return ARM_AM::getT2SOImmVal(Imm) != -1;
186 }
187
188 inline bool is_t2_so_imm_not(unsigned Imm) const {
189 return ARM_AM::getT2SOImmVal(~Imm) != -1;
190 }
191
192 // Include the pieces autogenerated from the target description.
193#include "ARMGenDAGISel.inc"
194
195private:
196 void transferMemOperands(SDNode *Src, SDNode *Dst);
197
198 /// Indexed (pre/post inc/dec) load matching code for ARM.
199 bool tryARMIndexedLoad(SDNode *N);
200 bool tryT1IndexedLoad(SDNode *N);
201 bool tryT2IndexedLoad(SDNode *N);
202 bool tryMVEIndexedLoad(SDNode *N);
203 bool tryFMULFixed(SDNode *N, SDLoc dl);
204 bool tryFP_TO_INT(SDNode *N, SDLoc dl);
205 bool transformFixedFloatingPointConversion(SDNode *N, SDNode *FMul,
206 bool IsUnsigned,
207 bool FixedToFloat);
208
209 /// SelectVLD - Select NEON load intrinsics. NumVecs should be
210 /// 1, 2, 3 or 4. The opcode arrays specify the instructions used for
211 /// loads of D registers and even subregs and odd subregs of Q registers.
212 /// For NumVecs <= 2, QOpcodes1 is not used.
213 void SelectVLD(SDNode *N, bool isUpdating, unsigned NumVecs,
214 const uint16_t *DOpcodes, const uint16_t *QOpcodes0,
215 const uint16_t *QOpcodes1);
216
217 /// SelectVST - Select NEON store intrinsics. NumVecs should
218 /// be 1, 2, 3 or 4. The opcode arrays specify the instructions used for
219 /// stores of D registers and even subregs and odd subregs of Q registers.
220 /// For NumVecs <= 2, QOpcodes1 is not used.
221 void SelectVST(SDNode *N, bool isUpdating, unsigned NumVecs,
222 const uint16_t *DOpcodes, const uint16_t *QOpcodes0,
223 const uint16_t *QOpcodes1);
224
225 /// SelectVLDSTLane - Select NEON load/store lane intrinsics. NumVecs should
226 /// be 2, 3 or 4. The opcode arrays specify the instructions used for
227 /// load/store of D registers and Q registers.
228 void SelectVLDSTLane(SDNode *N, bool IsLoad, bool isUpdating,
229 unsigned NumVecs, const uint16_t *DOpcodes,
230 const uint16_t *QOpcodes);
231
232 /// Helper functions for setting up clusters of MVE predication operands.
233 template <typename SDValueVector>
234 void AddMVEPredicateToOps(SDValueVector &Ops, SDLoc Loc,
235 SDValue PredicateMask);
236 template <typename SDValueVector>
237 void AddMVEPredicateToOps(SDValueVector &Ops, SDLoc Loc,
238 SDValue PredicateMask, SDValue Inactive);
239
240 template <typename SDValueVector>
241 void AddEmptyMVEPredicateToOps(SDValueVector &Ops, SDLoc Loc);
242 template <typename SDValueVector>
243 void AddEmptyMVEPredicateToOps(SDValueVector &Ops, SDLoc Loc, EVT InactiveTy);
244
245 /// SelectMVE_WB - Select MVE writeback load/store intrinsics.
246 void SelectMVE_WB(SDNode *N, const uint16_t *Opcodes, bool Predicated);
247
248 /// SelectMVE_LongShift - Select MVE 64-bit scalar shift intrinsics.
249 void SelectMVE_LongShift(SDNode *N, uint16_t Opcode, bool Immediate,
250 bool HasSaturationOperand);
251
252 /// SelectMVE_VADCSBC - Select MVE vector add/sub-with-carry intrinsics.
253 void SelectMVE_VADCSBC(SDNode *N, uint16_t OpcodeWithCarry,
254 uint16_t OpcodeWithNoCarry, bool Add, bool Predicated);
255
256 /// SelectMVE_VSHLC - Select MVE intrinsics for a shift that carries between
257 /// vector lanes.
258 void SelectMVE_VSHLC(SDNode *N, bool Predicated);
259
260 /// Select long MVE vector reductions with two vector operands
261 /// Stride is the number of vector element widths the instruction can operate
262 /// on:
263 /// 2 for long non-rounding variants, vml{a,s}ldav[a][x]: [i16, i32]
264 /// 1 for long rounding variants: vrml{a,s}ldavh[a][x]: [i32]
265 /// Stride is used when addressing the OpcodesS array which contains multiple
266 /// opcodes for each element width.
267 /// TySize is the index into the list of element types listed above
268 void SelectBaseMVE_VMLLDAV(SDNode *N, bool Predicated,
269 const uint16_t *OpcodesS, const uint16_t *OpcodesU,
270 size_t Stride, size_t TySize);
271
272 /// Select a 64-bit MVE vector reduction with two vector operands
273 /// arm_mve_vmlldava_[predicated]
274 void SelectMVE_VMLLDAV(SDNode *N, bool Predicated, const uint16_t *OpcodesS,
275 const uint16_t *OpcodesU);
276 /// Select a 72-bit MVE vector rounding reduction with two vector operands
277 /// int_arm_mve_vrmlldavha[_predicated]
278 void SelectMVE_VRMLLDAVH(SDNode *N, bool Predicated, const uint16_t *OpcodesS,
279 const uint16_t *OpcodesU);
280
281 /// SelectMVE_VLD - Select MVE interleaving load intrinsics. NumVecs
282 /// should be 2 or 4. The opcode array specifies the instructions
283 /// used for 8, 16 and 32-bit lane sizes respectively, and each
284 /// pointer points to a set of NumVecs sub-opcodes used for the
285 /// different stages (e.g. VLD20 versus VLD21) of each load family.
286 void SelectMVE_VLD(SDNode *N, unsigned NumVecs,
287 const uint16_t *const *Opcodes, bool HasWriteback);
288
289 /// SelectMVE_VxDUP - Select MVE incrementing-dup instructions. Opcodes is an
290 /// array of 3 elements for the 8, 16 and 32-bit lane sizes.
291 void SelectMVE_VxDUP(SDNode *N, const uint16_t *Opcodes,
292 bool Wrapping, bool Predicated);
293
294 /// Select SelectCDE_CXxD - Select CDE dual-GPR instruction (one of CX1D,
295 /// CX1DA, CX2D, CX2DA, CX3, CX3DA).
296 /// \arg \c NumExtraOps number of extra operands besides the coprocossor,
297 /// the accumulator and the immediate operand, i.e. 0
298 /// for CX1*, 1 for CX2*, 2 for CX3*
299 /// \arg \c HasAccum whether the instruction has an accumulator operand
300 void SelectCDE_CXxD(SDNode *N, uint16_t Opcode, size_t NumExtraOps,
301 bool HasAccum);
302
303 /// SelectVLDDup - Select NEON load-duplicate intrinsics. NumVecs
304 /// should be 1, 2, 3 or 4. The opcode array specifies the instructions used
305 /// for loading D registers.
306 void SelectVLDDup(SDNode *N, bool IsIntrinsic, bool isUpdating,
307 unsigned NumVecs, const uint16_t *DOpcodes,
308 const uint16_t *QOpcodes0 = nullptr,
309 const uint16_t *QOpcodes1 = nullptr);
310
311 /// Try to select SBFX/UBFX instructions for ARM.
312 bool tryV6T2BitfieldExtractOp(SDNode *N, bool isSigned);
313
314 bool tryInsertVectorElt(SDNode *N);
315
316 // Select special operations if node forms integer ABS pattern
317 bool tryABSOp(SDNode *N);
318
319 bool tryReadRegister(SDNode *N);
320 bool tryWriteRegister(SDNode *N);
321
322 bool tryInlineAsm(SDNode *N);
323
324 void SelectCMPZ(SDNode *N, bool &SwitchEQNEToPLMI);
325
326 void SelectCMP_SWAP(SDNode *N);
327
328 /// SelectInlineAsmMemoryOperand - Implement addressing mode selection for
329 /// inline asm expressions.
330 bool SelectInlineAsmMemoryOperand(const SDValue &Op, unsigned ConstraintID,
331 std::vector<SDValue> &OutOps) override;
332
333 // Form pairs of consecutive R, S, D, or Q registers.
334 SDNode *createGPRPairNode(EVT VT, SDValue V0, SDValue V1);
335 SDNode *createSRegPairNode(EVT VT, SDValue V0, SDValue V1);
336 SDNode *createDRegPairNode(EVT VT, SDValue V0, SDValue V1);
337 SDNode *createQRegPairNode(EVT VT, SDValue V0, SDValue V1);
338
339 // Form sequences of 4 consecutive S, D, or Q registers.
340 SDNode *createQuadSRegsNode(EVT VT, SDValue V0, SDValue V1, SDValue V2, SDValue V3);
341 SDNode *createQuadDRegsNode(EVT VT, SDValue V0, SDValue V1, SDValue V2, SDValue V3);
342 SDNode *createQuadQRegsNode(EVT VT, SDValue V0, SDValue V1, SDValue V2, SDValue V3);
343
344 // Get the alignment operand for a NEON VLD or VST instruction.
345 SDValue GetVLDSTAlign(SDValue Align, const SDLoc &dl, unsigned NumVecs,
346 bool is64BitVector);
347
348 /// Checks if N is a multiplication by a constant where we can extract out a
349 /// power of two from the constant so that it can be used in a shift, but only
350 /// if it simplifies the materialization of the constant. Returns true if it
351 /// is, and assigns to PowerOfTwo the power of two that should be extracted
352 /// out and to NewMulConst the new constant to be multiplied by.
353 bool canExtractShiftFromMul(const SDValue &N, unsigned MaxShift,
354 unsigned &PowerOfTwo, SDValue &NewMulConst) const;
355
356 /// Replace N with M in CurDAG, in a way that also ensures that M gets
357 /// selected when N would have been selected.
358 void replaceDAGValue(const SDValue &N, SDValue M);
359};
360}
361
362/// isInt32Immediate - This method tests to see if the node is a 32-bit constant
363/// operand. If so Imm will receive the 32-bit value.
364static bool isInt32Immediate(SDNode *N, unsigned &Imm) {
365 if (N->getOpcode() == ISD::Constant && N->getValueType(0) == MVT::i32) {
366 Imm = cast<ConstantSDNode>(N)->getZExtValue();
367 return true;
368 }
369 return false;
370}
371
372// isInt32Immediate - This method tests to see if a constant operand.
373// If so Imm will receive the 32 bit value.
374static bool isInt32Immediate(SDValue N, unsigned &Imm) {
375 return isInt32Immediate(N.getNode(), Imm);
376}
377
378// isOpcWithIntImmediate - This method tests to see if the node is a specific
379// opcode and that it has a immediate integer right operand.
380// If so Imm will receive the 32 bit value.
381static bool isOpcWithIntImmediate(SDNode *N, unsigned Opc, unsigned& Imm) {
382 return N->getOpcode() == Opc &&
383 isInt32Immediate(N->getOperand(1).getNode(), Imm);
384}
385
386/// Check whether a particular node is a constant value representable as
387/// (N * Scale) where (N in [\p RangeMin, \p RangeMax).
388///
389/// \param ScaledConstant [out] - On success, the pre-scaled constant value.
390static bool isScaledConstantInRange(SDValue Node, int Scale,
391 int RangeMin, int RangeMax,
392 int &ScaledConstant) {
393 assert(Scale > 0 && "Invalid scale!")(static_cast <bool> (Scale > 0 && "Invalid scale!"
) ? void (0) : __assert_fail ("Scale > 0 && \"Invalid scale!\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 393, __extension__
__PRETTY_FUNCTION__));
394
395 // Check that this is a constant.
396 const ConstantSDNode *C = dyn_cast<ConstantSDNode>(Node);
397 if (!C)
398 return false;
399
400 ScaledConstant = (int) C->getZExtValue();
401 if ((ScaledConstant % Scale) != 0)
402 return false;
403
404 ScaledConstant /= Scale;
405 return ScaledConstant >= RangeMin && ScaledConstant < RangeMax;
406}
407
408void ARMDAGToDAGISel::PreprocessISelDAG() {
409 if (!Subtarget->hasV6T2Ops())
410 return;
411
412 bool isThumb2 = Subtarget->isThumb();
413 // We use make_early_inc_range to avoid invalidation issues.
414 for (SDNode &N : llvm::make_early_inc_range(CurDAG->allnodes())) {
415 if (N.getOpcode() != ISD::ADD)
416 continue;
417
418 // Look for (add X1, (and (srl X2, c1), c2)) where c2 is constant with
419 // leading zeros, followed by consecutive set bits, followed by 1 or 2
420 // trailing zeros, e.g. 1020.
421 // Transform the expression to
422 // (add X1, (shl (and (srl X2, c1), (c2>>tz)), tz)) where tz is the number
423 // of trailing zeros of c2. The left shift would be folded as an shifter
424 // operand of 'add' and the 'and' and 'srl' would become a bits extraction
425 // node (UBFX).
426
427 SDValue N0 = N.getOperand(0);
428 SDValue N1 = N.getOperand(1);
429 unsigned And_imm = 0;
430 if (!isOpcWithIntImmediate(N1.getNode(), ISD::AND, And_imm)) {
431 if (isOpcWithIntImmediate(N0.getNode(), ISD::AND, And_imm))
432 std::swap(N0, N1);
433 }
434 if (!And_imm)
435 continue;
436
437 // Check if the AND mask is an immediate of the form: 000.....1111111100
438 unsigned TZ = countTrailingZeros(And_imm);
439 if (TZ != 1 && TZ != 2)
440 // Be conservative here. Shifter operands aren't always free. e.g. On
441 // Swift, left shifter operand of 1 / 2 for free but others are not.
442 // e.g.
443 // ubfx r3, r1, #16, #8
444 // ldr.w r3, [r0, r3, lsl #2]
445 // vs.
446 // mov.w r9, #1020
447 // and.w r2, r9, r1, lsr #14
448 // ldr r2, [r0, r2]
449 continue;
450 And_imm >>= TZ;
451 if (And_imm & (And_imm + 1))
452 continue;
453
454 // Look for (and (srl X, c1), c2).
455 SDValue Srl = N1.getOperand(0);
456 unsigned Srl_imm = 0;
457 if (!isOpcWithIntImmediate(Srl.getNode(), ISD::SRL, Srl_imm) ||
458 (Srl_imm <= 2))
459 continue;
460
461 // Make sure first operand is not a shifter operand which would prevent
462 // folding of the left shift.
463 SDValue CPTmp0;
464 SDValue CPTmp1;
465 SDValue CPTmp2;
466 if (isThumb2) {
467 if (SelectImmShifterOperand(N0, CPTmp0, CPTmp1))
468 continue;
469 } else {
470 if (SelectImmShifterOperand(N0, CPTmp0, CPTmp1) ||
471 SelectRegShifterOperand(N0, CPTmp0, CPTmp1, CPTmp2))
472 continue;
473 }
474
475 // Now make the transformation.
476 Srl = CurDAG->getNode(ISD::SRL, SDLoc(Srl), MVT::i32,
477 Srl.getOperand(0),
478 CurDAG->getConstant(Srl_imm + TZ, SDLoc(Srl),
479 MVT::i32));
480 N1 = CurDAG->getNode(ISD::AND, SDLoc(N1), MVT::i32,
481 Srl,
482 CurDAG->getConstant(And_imm, SDLoc(Srl), MVT::i32));
483 N1 = CurDAG->getNode(ISD::SHL, SDLoc(N1), MVT::i32,
484 N1, CurDAG->getConstant(TZ, SDLoc(Srl), MVT::i32));
485 CurDAG->UpdateNodeOperands(&N, N0, N1);
486 }
487}
488
489/// hasNoVMLxHazardUse - Return true if it's desirable to select a FP MLA / MLS
490/// node. VFP / NEON fp VMLA / VMLS instructions have special RAW hazards (at
491/// least on current ARM implementations) which should be avoidded.
492bool ARMDAGToDAGISel::hasNoVMLxHazardUse(SDNode *N) const {
493 if (OptLevel == CodeGenOpt::None)
494 return true;
495
496 if (!Subtarget->hasVMLxHazards())
497 return true;
498
499 if (!N->hasOneUse())
500 return false;
501
502 SDNode *Use = *N->use_begin();
503 if (Use->getOpcode() == ISD::CopyToReg)
504 return true;
505 if (Use->isMachineOpcode()) {
506 const ARMBaseInstrInfo *TII = static_cast<const ARMBaseInstrInfo *>(
507 CurDAG->getSubtarget().getInstrInfo());
508
509 const MCInstrDesc &MCID = TII->get(Use->getMachineOpcode());
510 if (MCID.mayStore())
511 return true;
512 unsigned Opcode = MCID.getOpcode();
513 if (Opcode == ARM::VMOVRS || Opcode == ARM::VMOVRRD)
514 return true;
515 // vmlx feeding into another vmlx. We actually want to unfold
516 // the use later in the MLxExpansion pass. e.g.
517 // vmla
518 // vmla (stall 8 cycles)
519 //
520 // vmul (5 cycles)
521 // vadd (5 cycles)
522 // vmla
523 // This adds up to about 18 - 19 cycles.
524 //
525 // vmla
526 // vmul (stall 4 cycles)
527 // vadd adds up to about 14 cycles.
528 return TII->isFpMLxInstruction(Opcode);
529 }
530
531 return false;
532}
533
534bool ARMDAGToDAGISel::isShifterOpProfitable(const SDValue &Shift,
535 ARM_AM::ShiftOpc ShOpcVal,
536 unsigned ShAmt) {
537 if (!Subtarget->isLikeA9() && !Subtarget->isSwift())
538 return true;
539 if (Shift.hasOneUse())
540 return true;
541 // R << 2 is free.
542 return ShOpcVal == ARM_AM::lsl &&
543 (ShAmt == 2 || (Subtarget->isSwift() && ShAmt == 1));
544}
545
546bool ARMDAGToDAGISel::canExtractShiftFromMul(const SDValue &N,
547 unsigned MaxShift,
548 unsigned &PowerOfTwo,
549 SDValue &NewMulConst) const {
550 assert(N.getOpcode() == ISD::MUL)(static_cast <bool> (N.getOpcode() == ISD::MUL) ? void (
0) : __assert_fail ("N.getOpcode() == ISD::MUL", "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp"
, 550, __extension__ __PRETTY_FUNCTION__));
551 assert(MaxShift > 0)(static_cast <bool> (MaxShift > 0) ? void (0) : __assert_fail
("MaxShift > 0", "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp"
, 551, __extension__ __PRETTY_FUNCTION__));
552
553 // If the multiply is used in more than one place then changing the constant
554 // will make other uses incorrect, so don't.
555 if (!N.hasOneUse()) return false;
556 // Check if the multiply is by a constant
557 ConstantSDNode *MulConst = dyn_cast<ConstantSDNode>(N.getOperand(1));
558 if (!MulConst) return false;
559 // If the constant is used in more than one place then modifying it will mean
560 // we need to materialize two constants instead of one, which is a bad idea.
561 if (!MulConst->hasOneUse()) return false;
562 unsigned MulConstVal = MulConst->getZExtValue();
563 if (MulConstVal == 0) return false;
564
565 // Find the largest power of 2 that MulConstVal is a multiple of
566 PowerOfTwo = MaxShift;
567 while ((MulConstVal % (1 << PowerOfTwo)) != 0) {
568 --PowerOfTwo;
569 if (PowerOfTwo == 0) return false;
570 }
571
572 // Only optimise if the new cost is better
573 unsigned NewMulConstVal = MulConstVal / (1 << PowerOfTwo);
574 NewMulConst = CurDAG->getConstant(NewMulConstVal, SDLoc(N), MVT::i32);
575 unsigned OldCost = ConstantMaterializationCost(MulConstVal, Subtarget);
576 unsigned NewCost = ConstantMaterializationCost(NewMulConstVal, Subtarget);
577 return NewCost < OldCost;
578}
579
580void ARMDAGToDAGISel::replaceDAGValue(const SDValue &N, SDValue M) {
581 CurDAG->RepositionNode(N.getNode()->getIterator(), M.getNode());
582 ReplaceUses(N, M);
583}
584
585bool ARMDAGToDAGISel::SelectImmShifterOperand(SDValue N,
586 SDValue &BaseReg,
587 SDValue &Opc,
588 bool CheckProfitability) {
589 if (DisableShifterOp)
590 return false;
591
592 // If N is a multiply-by-constant and it's profitable to extract a shift and
593 // use it in a shifted operand do so.
594 if (N.getOpcode() == ISD::MUL) {
595 unsigned PowerOfTwo = 0;
596 SDValue NewMulConst;
597 if (canExtractShiftFromMul(N, 31, PowerOfTwo, NewMulConst)) {
598 HandleSDNode Handle(N);
599 SDLoc Loc(N);
600 replaceDAGValue(N.getOperand(1), NewMulConst);
601 BaseReg = Handle.getValue();
602 Opc = CurDAG->getTargetConstant(
603 ARM_AM::getSORegOpc(ARM_AM::lsl, PowerOfTwo), Loc, MVT::i32);
604 return true;
605 }
606 }
607
608 ARM_AM::ShiftOpc ShOpcVal = ARM_AM::getShiftOpcForNode(N.getOpcode());
609
610 // Don't match base register only case. That is matched to a separate
611 // lower complexity pattern with explicit register operand.
612 if (ShOpcVal == ARM_AM::no_shift) return false;
613
614 BaseReg = N.getOperand(0);
615 unsigned ShImmVal = 0;
616 ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1));
617 if (!RHS) return false;
618 ShImmVal = RHS->getZExtValue() & 31;
619 Opc = CurDAG->getTargetConstant(ARM_AM::getSORegOpc(ShOpcVal, ShImmVal),
620 SDLoc(N), MVT::i32);
621 return true;
622}
623
624bool ARMDAGToDAGISel::SelectRegShifterOperand(SDValue N,
625 SDValue &BaseReg,
626 SDValue &ShReg,
627 SDValue &Opc,
628 bool CheckProfitability) {
629 if (DisableShifterOp)
630 return false;
631
632 ARM_AM::ShiftOpc ShOpcVal = ARM_AM::getShiftOpcForNode(N.getOpcode());
633
634 // Don't match base register only case. That is matched to a separate
635 // lower complexity pattern with explicit register operand.
636 if (ShOpcVal == ARM_AM::no_shift) return false;
637
638 BaseReg = N.getOperand(0);
639 unsigned ShImmVal = 0;
640 ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1));
641 if (RHS) return false;
642
643 ShReg = N.getOperand(1);
644 if (CheckProfitability && !isShifterOpProfitable(N, ShOpcVal, ShImmVal))
645 return false;
646 Opc = CurDAG->getTargetConstant(ARM_AM::getSORegOpc(ShOpcVal, ShImmVal),
647 SDLoc(N), MVT::i32);
648 return true;
649}
650
651// Determine whether an ISD::OR's operands are suitable to turn the operation
652// into an addition, which often has more compact encodings.
653bool ARMDAGToDAGISel::SelectAddLikeOr(SDNode *Parent, SDValue N, SDValue &Out) {
654 assert(Parent->getOpcode() == ISD::OR && "unexpected parent")(static_cast <bool> (Parent->getOpcode() == ISD::OR &&
"unexpected parent") ? void (0) : __assert_fail ("Parent->getOpcode() == ISD::OR && \"unexpected parent\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 654, __extension__
__PRETTY_FUNCTION__));
655 Out = N;
656 return CurDAG->haveNoCommonBitsSet(N, Parent->getOperand(1));
657}
658
659
660bool ARMDAGToDAGISel::SelectAddrModeImm12(SDValue N,
661 SDValue &Base,
662 SDValue &OffImm) {
663 // Match simple R + imm12 operands.
664
665 // Base only.
666 if (N.getOpcode() != ISD::ADD && N.getOpcode() != ISD::SUB &&
667 !CurDAG->isBaseWithConstantOffset(N)) {
668 if (N.getOpcode() == ISD::FrameIndex) {
669 // Match frame index.
670 int FI = cast<FrameIndexSDNode>(N)->getIndex();
671 Base = CurDAG->getTargetFrameIndex(
672 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
673 OffImm = CurDAG->getTargetConstant(0, SDLoc(N), MVT::i32);
674 return true;
675 }
676
677 if (N.getOpcode() == ARMISD::Wrapper &&
678 N.getOperand(0).getOpcode() != ISD::TargetGlobalAddress &&
679 N.getOperand(0).getOpcode() != ISD::TargetExternalSymbol &&
680 N.getOperand(0).getOpcode() != ISD::TargetGlobalTLSAddress) {
681 Base = N.getOperand(0);
682 } else
683 Base = N;
684 OffImm = CurDAG->getTargetConstant(0, SDLoc(N), MVT::i32);
685 return true;
686 }
687
688 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) {
689 int RHSC = (int)RHS->getSExtValue();
690 if (N.getOpcode() == ISD::SUB)
691 RHSC = -RHSC;
692
693 if (RHSC > -0x1000 && RHSC < 0x1000) { // 12 bits
694 Base = N.getOperand(0);
695 if (Base.getOpcode() == ISD::FrameIndex) {
696 int FI = cast<FrameIndexSDNode>(Base)->getIndex();
697 Base = CurDAG->getTargetFrameIndex(
698 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
699 }
700 OffImm = CurDAG->getTargetConstant(RHSC, SDLoc(N), MVT::i32);
701 return true;
702 }
703 }
704
705 // Base only.
706 Base = N;
707 OffImm = CurDAG->getTargetConstant(0, SDLoc(N), MVT::i32);
708 return true;
709}
710
711
712
713bool ARMDAGToDAGISel::SelectLdStSOReg(SDValue N, SDValue &Base, SDValue &Offset,
714 SDValue &Opc) {
715 if (N.getOpcode() == ISD::MUL &&
716 ((!Subtarget->isLikeA9() && !Subtarget->isSwift()) || N.hasOneUse())) {
717 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) {
718 // X * [3,5,9] -> X + X * [2,4,8] etc.
719 int RHSC = (int)RHS->getZExtValue();
720 if (RHSC & 1) {
721 RHSC = RHSC & ~1;
722 ARM_AM::AddrOpc AddSub = ARM_AM::add;
723 if (RHSC < 0) {
724 AddSub = ARM_AM::sub;
725 RHSC = - RHSC;
726 }
727 if (isPowerOf2_32(RHSC)) {
728 unsigned ShAmt = Log2_32(RHSC);
729 Base = Offset = N.getOperand(0);
730 Opc = CurDAG->getTargetConstant(ARM_AM::getAM2Opc(AddSub, ShAmt,
731 ARM_AM::lsl),
732 SDLoc(N), MVT::i32);
733 return true;
734 }
735 }
736 }
737 }
738
739 if (N.getOpcode() != ISD::ADD && N.getOpcode() != ISD::SUB &&
740 // ISD::OR that is equivalent to an ISD::ADD.
741 !CurDAG->isBaseWithConstantOffset(N))
742 return false;
743
744 // Leave simple R +/- imm12 operands for LDRi12
745 if (N.getOpcode() == ISD::ADD || N.getOpcode() == ISD::OR) {
746 int RHSC;
747 if (isScaledConstantInRange(N.getOperand(1), /*Scale=*/1,
748 -0x1000+1, 0x1000, RHSC)) // 12 bits.
749 return false;
750 }
751
752 // Otherwise this is R +/- [possibly shifted] R.
753 ARM_AM::AddrOpc AddSub = N.getOpcode() == ISD::SUB ? ARM_AM::sub:ARM_AM::add;
754 ARM_AM::ShiftOpc ShOpcVal =
755 ARM_AM::getShiftOpcForNode(N.getOperand(1).getOpcode());
756 unsigned ShAmt = 0;
757
758 Base = N.getOperand(0);
759 Offset = N.getOperand(1);
760
761 if (ShOpcVal != ARM_AM::no_shift) {
762 // Check to see if the RHS of the shift is a constant, if not, we can't fold
763 // it.
764 if (ConstantSDNode *Sh =
765 dyn_cast<ConstantSDNode>(N.getOperand(1).getOperand(1))) {
766 ShAmt = Sh->getZExtValue();
767 if (isShifterOpProfitable(Offset, ShOpcVal, ShAmt))
768 Offset = N.getOperand(1).getOperand(0);
769 else {
770 ShAmt = 0;
771 ShOpcVal = ARM_AM::no_shift;
772 }
773 } else {
774 ShOpcVal = ARM_AM::no_shift;
775 }
776 }
777
778 // Try matching (R shl C) + (R).
779 if (N.getOpcode() != ISD::SUB && ShOpcVal == ARM_AM::no_shift &&
780 !(Subtarget->isLikeA9() || Subtarget->isSwift() ||
781 N.getOperand(0).hasOneUse())) {
782 ShOpcVal = ARM_AM::getShiftOpcForNode(N.getOperand(0).getOpcode());
783 if (ShOpcVal != ARM_AM::no_shift) {
784 // Check to see if the RHS of the shift is a constant, if not, we can't
785 // fold it.
786 if (ConstantSDNode *Sh =
787 dyn_cast<ConstantSDNode>(N.getOperand(0).getOperand(1))) {
788 ShAmt = Sh->getZExtValue();
789 if (isShifterOpProfitable(N.getOperand(0), ShOpcVal, ShAmt)) {
790 Offset = N.getOperand(0).getOperand(0);
791 Base = N.getOperand(1);
792 } else {
793 ShAmt = 0;
794 ShOpcVal = ARM_AM::no_shift;
795 }
796 } else {
797 ShOpcVal = ARM_AM::no_shift;
798 }
799 }
800 }
801
802 // If Offset is a multiply-by-constant and it's profitable to extract a shift
803 // and use it in a shifted operand do so.
804 if (Offset.getOpcode() == ISD::MUL && N.hasOneUse()) {
805 unsigned PowerOfTwo = 0;
806 SDValue NewMulConst;
807 if (canExtractShiftFromMul(Offset, 31, PowerOfTwo, NewMulConst)) {
808 HandleSDNode Handle(Offset);
809 replaceDAGValue(Offset.getOperand(1), NewMulConst);
810 Offset = Handle.getValue();
811 ShAmt = PowerOfTwo;
812 ShOpcVal = ARM_AM::lsl;
813 }
814 }
815
816 Opc = CurDAG->getTargetConstant(ARM_AM::getAM2Opc(AddSub, ShAmt, ShOpcVal),
817 SDLoc(N), MVT::i32);
818 return true;
819}
820
821bool ARMDAGToDAGISel::SelectAddrMode2OffsetReg(SDNode *Op, SDValue N,
822 SDValue &Offset, SDValue &Opc) {
823 unsigned Opcode = Op->getOpcode();
824 ISD::MemIndexedMode AM = (Opcode == ISD::LOAD)
825 ? cast<LoadSDNode>(Op)->getAddressingMode()
826 : cast<StoreSDNode>(Op)->getAddressingMode();
827 ARM_AM::AddrOpc AddSub = (AM == ISD::PRE_INC || AM == ISD::POST_INC)
828 ? ARM_AM::add : ARM_AM::sub;
829 int Val;
830 if (isScaledConstantInRange(N, /*Scale=*/1, 0, 0x1000, Val))
831 return false;
832
833 Offset = N;
834 ARM_AM::ShiftOpc ShOpcVal = ARM_AM::getShiftOpcForNode(N.getOpcode());
835 unsigned ShAmt = 0;
836 if (ShOpcVal != ARM_AM::no_shift) {
837 // Check to see if the RHS of the shift is a constant, if not, we can't fold
838 // it.
839 if (ConstantSDNode *Sh = dyn_cast<ConstantSDNode>(N.getOperand(1))) {
840 ShAmt = Sh->getZExtValue();
841 if (isShifterOpProfitable(N, ShOpcVal, ShAmt))
842 Offset = N.getOperand(0);
843 else {
844 ShAmt = 0;
845 ShOpcVal = ARM_AM::no_shift;
846 }
847 } else {
848 ShOpcVal = ARM_AM::no_shift;
849 }
850 }
851
852 Opc = CurDAG->getTargetConstant(ARM_AM::getAM2Opc(AddSub, ShAmt, ShOpcVal),
853 SDLoc(N), MVT::i32);
854 return true;
855}
856
857bool ARMDAGToDAGISel::SelectAddrMode2OffsetImmPre(SDNode *Op, SDValue N,
858 SDValue &Offset, SDValue &Opc) {
859 unsigned Opcode = Op->getOpcode();
860 ISD::MemIndexedMode AM = (Opcode == ISD::LOAD)
861 ? cast<LoadSDNode>(Op)->getAddressingMode()
862 : cast<StoreSDNode>(Op)->getAddressingMode();
863 ARM_AM::AddrOpc AddSub = (AM == ISD::PRE_INC || AM == ISD::POST_INC)
864 ? ARM_AM::add : ARM_AM::sub;
865 int Val;
866 if (isScaledConstantInRange(N, /*Scale=*/1, 0, 0x1000, Val)) { // 12 bits.
867 if (AddSub == ARM_AM::sub) Val *= -1;
868 Offset = CurDAG->getRegister(0, MVT::i32);
869 Opc = CurDAG->getTargetConstant(Val, SDLoc(Op), MVT::i32);
870 return true;
871 }
872
873 return false;
874}
875
876
877bool ARMDAGToDAGISel::SelectAddrMode2OffsetImm(SDNode *Op, SDValue N,
878 SDValue &Offset, SDValue &Opc) {
879 unsigned Opcode = Op->getOpcode();
880 ISD::MemIndexedMode AM = (Opcode == ISD::LOAD)
881 ? cast<LoadSDNode>(Op)->getAddressingMode()
882 : cast<StoreSDNode>(Op)->getAddressingMode();
883 ARM_AM::AddrOpc AddSub = (AM == ISD::PRE_INC || AM == ISD::POST_INC)
884 ? ARM_AM::add : ARM_AM::sub;
885 int Val;
886 if (isScaledConstantInRange(N, /*Scale=*/1, 0, 0x1000, Val)) { // 12 bits.
887 Offset = CurDAG->getRegister(0, MVT::i32);
888 Opc = CurDAG->getTargetConstant(ARM_AM::getAM2Opc(AddSub, Val,
889 ARM_AM::no_shift),
890 SDLoc(Op), MVT::i32);
891 return true;
892 }
893
894 return false;
895}
896
897bool ARMDAGToDAGISel::SelectAddrOffsetNone(SDValue N, SDValue &Base) {
898 Base = N;
899 return true;
900}
901
902bool ARMDAGToDAGISel::SelectAddrMode3(SDValue N,
903 SDValue &Base, SDValue &Offset,
904 SDValue &Opc) {
905 if (N.getOpcode() == ISD::SUB) {
906 // X - C is canonicalize to X + -C, no need to handle it here.
907 Base = N.getOperand(0);
908 Offset = N.getOperand(1);
909 Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(ARM_AM::sub, 0), SDLoc(N),
910 MVT::i32);
911 return true;
912 }
913
914 if (!CurDAG->isBaseWithConstantOffset(N)) {
915 Base = N;
916 if (N.getOpcode() == ISD::FrameIndex) {
917 int FI = cast<FrameIndexSDNode>(N)->getIndex();
918 Base = CurDAG->getTargetFrameIndex(
919 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
920 }
921 Offset = CurDAG->getRegister(0, MVT::i32);
922 Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(ARM_AM::add, 0), SDLoc(N),
923 MVT::i32);
924 return true;
925 }
926
927 // If the RHS is +/- imm8, fold into addr mode.
928 int RHSC;
929 if (isScaledConstantInRange(N.getOperand(1), /*Scale=*/1,
930 -256 + 1, 256, RHSC)) { // 8 bits.
931 Base = N.getOperand(0);
932 if (Base.getOpcode() == ISD::FrameIndex) {
933 int FI = cast<FrameIndexSDNode>(Base)->getIndex();
934 Base = CurDAG->getTargetFrameIndex(
935 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
936 }
937 Offset = CurDAG->getRegister(0, MVT::i32);
938
939 ARM_AM::AddrOpc AddSub = ARM_AM::add;
940 if (RHSC < 0) {
941 AddSub = ARM_AM::sub;
942 RHSC = -RHSC;
943 }
944 Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(AddSub, RHSC), SDLoc(N),
945 MVT::i32);
946 return true;
947 }
948
949 Base = N.getOperand(0);
950 Offset = N.getOperand(1);
951 Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(ARM_AM::add, 0), SDLoc(N),
952 MVT::i32);
953 return true;
954}
955
956bool ARMDAGToDAGISel::SelectAddrMode3Offset(SDNode *Op, SDValue N,
957 SDValue &Offset, SDValue &Opc) {
958 unsigned Opcode = Op->getOpcode();
959 ISD::MemIndexedMode AM = (Opcode == ISD::LOAD)
960 ? cast<LoadSDNode>(Op)->getAddressingMode()
961 : cast<StoreSDNode>(Op)->getAddressingMode();
962 ARM_AM::AddrOpc AddSub = (AM == ISD::PRE_INC || AM == ISD::POST_INC)
963 ? ARM_AM::add : ARM_AM::sub;
964 int Val;
965 if (isScaledConstantInRange(N, /*Scale=*/1, 0, 256, Val)) { // 12 bits.
966 Offset = CurDAG->getRegister(0, MVT::i32);
967 Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(AddSub, Val), SDLoc(Op),
968 MVT::i32);
969 return true;
970 }
971
972 Offset = N;
973 Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(AddSub, 0), SDLoc(Op),
974 MVT::i32);
975 return true;
976}
977
978bool ARMDAGToDAGISel::IsAddressingMode5(SDValue N, SDValue &Base, SDValue &Offset,
979 bool FP16) {
980 if (!CurDAG->isBaseWithConstantOffset(N)) {
981 Base = N;
982 if (N.getOpcode() == ISD::FrameIndex) {
983 int FI = cast<FrameIndexSDNode>(N)->getIndex();
984 Base = CurDAG->getTargetFrameIndex(
985 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
986 } else if (N.getOpcode() == ARMISD::Wrapper &&
987 N.getOperand(0).getOpcode() != ISD::TargetGlobalAddress &&
988 N.getOperand(0).getOpcode() != ISD::TargetExternalSymbol &&
989 N.getOperand(0).getOpcode() != ISD::TargetGlobalTLSAddress) {
990 Base = N.getOperand(0);
991 }
992 Offset = CurDAG->getTargetConstant(ARM_AM::getAM5Opc(ARM_AM::add, 0),
993 SDLoc(N), MVT::i32);
994 return true;
995 }
996
997 // If the RHS is +/- imm8, fold into addr mode.
998 int RHSC;
999 const int Scale = FP16 ? 2 : 4;
1000
1001 if (isScaledConstantInRange(N.getOperand(1), Scale, -255, 256, RHSC)) {
1002 Base = N.getOperand(0);
1003 if (Base.getOpcode() == ISD::FrameIndex) {
1004 int FI = cast<FrameIndexSDNode>(Base)->getIndex();
1005 Base = CurDAG->getTargetFrameIndex(
1006 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
1007 }
1008
1009 ARM_AM::AddrOpc AddSub = ARM_AM::add;
1010 if (RHSC < 0) {
1011 AddSub = ARM_AM::sub;
1012 RHSC = -RHSC;
1013 }
1014
1015 if (FP16)
1016 Offset = CurDAG->getTargetConstant(ARM_AM::getAM5FP16Opc(AddSub, RHSC),
1017 SDLoc(N), MVT::i32);
1018 else
1019 Offset = CurDAG->getTargetConstant(ARM_AM::getAM5Opc(AddSub, RHSC),
1020 SDLoc(N), MVT::i32);
1021
1022 return true;
1023 }
1024
1025 Base = N;
1026
1027 if (FP16)
1028 Offset = CurDAG->getTargetConstant(ARM_AM::getAM5FP16Opc(ARM_AM::add, 0),
1029 SDLoc(N), MVT::i32);
1030 else
1031 Offset = CurDAG->getTargetConstant(ARM_AM::getAM5Opc(ARM_AM::add, 0),
1032 SDLoc(N), MVT::i32);
1033
1034 return true;
1035}
1036
1037bool ARMDAGToDAGISel::SelectAddrMode5(SDValue N,
1038 SDValue &Base, SDValue &Offset) {
1039 return IsAddressingMode5(N, Base, Offset, /*FP16=*/ false);
1040}
1041
1042bool ARMDAGToDAGISel::SelectAddrMode5FP16(SDValue N,
1043 SDValue &Base, SDValue &Offset) {
1044 return IsAddressingMode5(N, Base, Offset, /*FP16=*/ true);
1045}
1046
1047bool ARMDAGToDAGISel::SelectAddrMode6(SDNode *Parent, SDValue N, SDValue &Addr,
1048 SDValue &Align) {
1049 Addr = N;
1050
1051 unsigned Alignment = 0;
1052
1053 MemSDNode *MemN = cast<MemSDNode>(Parent);
1054
1055 if (isa<LSBaseSDNode>(MemN) ||
1056 ((MemN->getOpcode() == ARMISD::VST1_UPD ||
1057 MemN->getOpcode() == ARMISD::VLD1_UPD) &&
1058 MemN->getConstantOperandVal(MemN->getNumOperands() - 1) == 1)) {
1059 // This case occurs only for VLD1-lane/dup and VST1-lane instructions.
1060 // The maximum alignment is equal to the memory size being referenced.
1061 unsigned MMOAlign = MemN->getAlignment();
1062 unsigned MemSize = MemN->getMemoryVT().getSizeInBits() / 8;
1063 if (MMOAlign >= MemSize && MemSize > 1)
1064 Alignment = MemSize;
1065 } else {
1066 // All other uses of addrmode6 are for intrinsics. For now just record
1067 // the raw alignment value; it will be refined later based on the legal
1068 // alignment operands for the intrinsic.
1069 Alignment = MemN->getAlignment();
1070 }
1071
1072 Align = CurDAG->getTargetConstant(Alignment, SDLoc(N), MVT::i32);
1073 return true;
1074}
1075
1076bool ARMDAGToDAGISel::SelectAddrMode6Offset(SDNode *Op, SDValue N,
1077 SDValue &Offset) {
1078 LSBaseSDNode *LdSt = cast<LSBaseSDNode>(Op);
1079 ISD::MemIndexedMode AM = LdSt->getAddressingMode();
1080 if (AM != ISD::POST_INC)
1081 return false;
1082 Offset = N;
1083 if (ConstantSDNode *NC = dyn_cast<ConstantSDNode>(N)) {
1084 if (NC->getZExtValue() * 8 == LdSt->getMemoryVT().getSizeInBits())
1085 Offset = CurDAG->getRegister(0, MVT::i32);
1086 }
1087 return true;
1088}
1089
1090bool ARMDAGToDAGISel::SelectAddrModePC(SDValue N,
1091 SDValue &Offset, SDValue &Label) {
1092 if (N.getOpcode() == ARMISD::PIC_ADD && N.hasOneUse()) {
1093 Offset = N.getOperand(0);
1094 SDValue N1 = N.getOperand(1);
1095 Label = CurDAG->getTargetConstant(cast<ConstantSDNode>(N1)->getZExtValue(),
1096 SDLoc(N), MVT::i32);
1097 return true;
1098 }
1099
1100 return false;
1101}
1102
1103
1104//===----------------------------------------------------------------------===//
1105// Thumb Addressing Modes
1106//===----------------------------------------------------------------------===//
1107
1108static bool shouldUseZeroOffsetLdSt(SDValue N) {
1109 // Negative numbers are difficult to materialise in thumb1. If we are
1110 // selecting the add of a negative, instead try to select ri with a zero
1111 // offset, so create the add node directly which will become a sub.
1112 if (N.getOpcode() != ISD::ADD)
1113 return false;
1114
1115 // Look for an imm which is not legal for ld/st, but is legal for sub.
1116 if (auto C = dyn_cast<ConstantSDNode>(N.getOperand(1)))
1117 return C->getSExtValue() < 0 && C->getSExtValue() >= -255;
1118
1119 return false;
1120}
1121
1122bool ARMDAGToDAGISel::SelectThumbAddrModeRRSext(SDValue N, SDValue &Base,
1123 SDValue &Offset) {
1124 if (N.getOpcode() != ISD::ADD && !CurDAG->isBaseWithConstantOffset(N)) {
1125 ConstantSDNode *NC = dyn_cast<ConstantSDNode>(N);
1126 if (!NC || !NC->isZero())
1127 return false;
1128
1129 Base = Offset = N;
1130 return true;
1131 }
1132
1133 Base = N.getOperand(0);
1134 Offset = N.getOperand(1);
1135 return true;
1136}
1137
1138bool ARMDAGToDAGISel::SelectThumbAddrModeRR(SDValue N, SDValue &Base,
1139 SDValue &Offset) {
1140 if (shouldUseZeroOffsetLdSt(N))
1141 return false; // Select ri instead
1142 return SelectThumbAddrModeRRSext(N, Base, Offset);
1143}
1144
1145bool
1146ARMDAGToDAGISel::SelectThumbAddrModeImm5S(SDValue N, unsigned Scale,
1147 SDValue &Base, SDValue &OffImm) {
1148 if (shouldUseZeroOffsetLdSt(N)) {
1149 Base = N;
1150 OffImm = CurDAG->getTargetConstant(0, SDLoc(N), MVT::i32);
1151 return true;
1152 }
1153
1154 if (!CurDAG->isBaseWithConstantOffset(N)) {
1155 if (N.getOpcode() == ISD::ADD) {
1156 return false; // We want to select register offset instead
1157 } else if (N.getOpcode() == ARMISD::Wrapper &&
1158 N.getOperand(0).getOpcode() != ISD::TargetGlobalAddress &&
1159 N.getOperand(0).getOpcode() != ISD::TargetExternalSymbol &&
1160 N.getOperand(0).getOpcode() != ISD::TargetConstantPool &&
1161 N.getOperand(0).getOpcode() != ISD::TargetGlobalTLSAddress) {
1162 Base = N.getOperand(0);
1163 } else {
1164 Base = N;
1165 }
1166
1167 OffImm = CurDAG->getTargetConstant(0, SDLoc(N), MVT::i32);
1168 return true;
1169 }
1170
1171 // If the RHS is + imm5 * scale, fold into addr mode.
1172 int RHSC;
1173 if (isScaledConstantInRange(N.getOperand(1), Scale, 0, 32, RHSC)) {
1174 Base = N.getOperand(0);
1175 OffImm = CurDAG->getTargetConstant(RHSC, SDLoc(N), MVT::i32);
1176 return true;
1177 }
1178
1179 // Offset is too large, so use register offset instead.
1180 return false;
1181}
1182
1183bool
1184ARMDAGToDAGISel::SelectThumbAddrModeImm5S4(SDValue N, SDValue &Base,
1185 SDValue &OffImm) {
1186 return SelectThumbAddrModeImm5S(N, 4, Base, OffImm);
1187}
1188
1189bool
1190ARMDAGToDAGISel::SelectThumbAddrModeImm5S2(SDValue N, SDValue &Base,
1191 SDValue &OffImm) {
1192 return SelectThumbAddrModeImm5S(N, 2, Base, OffImm);
1193}
1194
1195bool
1196ARMDAGToDAGISel::SelectThumbAddrModeImm5S1(SDValue N, SDValue &Base,
1197 SDValue &OffImm) {
1198 return SelectThumbAddrModeImm5S(N, 1, Base, OffImm);
1199}
1200
1201bool ARMDAGToDAGISel::SelectThumbAddrModeSP(SDValue N,
1202 SDValue &Base, SDValue &OffImm) {
1203 if (N.getOpcode() == ISD::FrameIndex) {
1204 int FI = cast<FrameIndexSDNode>(N)->getIndex();
1205 // Only multiples of 4 are allowed for the offset, so the frame object
1206 // alignment must be at least 4.
1207 MachineFrameInfo &MFI = MF->getFrameInfo();
1208 if (MFI.getObjectAlign(FI) < Align(4))
1209 MFI.setObjectAlignment(FI, Align(4));
1210 Base = CurDAG->getTargetFrameIndex(
1211 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
1212 OffImm = CurDAG->getTargetConstant(0, SDLoc(N), MVT::i32);
1213 return true;
1214 }
1215
1216 if (!CurDAG->isBaseWithConstantOffset(N))
1217 return false;
1218
1219 if (N.getOperand(0).getOpcode() == ISD::FrameIndex) {
1220 // If the RHS is + imm8 * scale, fold into addr mode.
1221 int RHSC;
1222 if (isScaledConstantInRange(N.getOperand(1), /*Scale=*/4, 0, 256, RHSC)) {
1223 Base = N.getOperand(0);
1224 int FI = cast<FrameIndexSDNode>(Base)->getIndex();
1225 // Make sure the offset is inside the object, or we might fail to
1226 // allocate an emergency spill slot. (An out-of-range access is UB, but
1227 // it could show up anyway.)
1228 MachineFrameInfo &MFI = MF->getFrameInfo();
1229 if (RHSC * 4 < MFI.getObjectSize(FI)) {
1230 // For LHS+RHS to result in an offset that's a multiple of 4 the object
1231 // indexed by the LHS must be 4-byte aligned.
1232 if (!MFI.isFixedObjectIndex(FI) && MFI.getObjectAlign(FI) < Align(4))
1233 MFI.setObjectAlignment(FI, Align(4));
1234 if (MFI.getObjectAlign(FI) >= Align(4)) {
1235 Base = CurDAG->getTargetFrameIndex(
1236 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
1237 OffImm = CurDAG->getTargetConstant(RHSC, SDLoc(N), MVT::i32);
1238 return true;
1239 }
1240 }
1241 }
1242 }
1243
1244 return false;
1245}
1246
1247template <unsigned Shift>
1248bool ARMDAGToDAGISel::SelectTAddrModeImm7(SDValue N, SDValue &Base,
1249 SDValue &OffImm) {
1250 if (N.getOpcode() == ISD::SUB || CurDAG->isBaseWithConstantOffset(N)) {
1251 int RHSC;
1252 if (isScaledConstantInRange(N.getOperand(1), 1 << Shift, -0x7f, 0x80,
1253 RHSC)) {
1254 Base = N.getOperand(0);
1255 if (N.getOpcode() == ISD::SUB)
1256 RHSC = -RHSC;
1257 OffImm =
1258 CurDAG->getTargetConstant(RHSC * (1 << Shift), SDLoc(N), MVT::i32);
1259 return true;
1260 }
1261 }
1262
1263 // Base only.
1264 Base = N;
1265 OffImm = CurDAG->getTargetConstant(0, SDLoc(N), MVT::i32);
1266 return true;
1267}
1268
1269
1270//===----------------------------------------------------------------------===//
1271// Thumb 2 Addressing Modes
1272//===----------------------------------------------------------------------===//
1273
1274
1275bool ARMDAGToDAGISel::SelectT2AddrModeImm12(SDValue N,
1276 SDValue &Base, SDValue &OffImm) {
1277 // Match simple R + imm12 operands.
1278
1279 // Base only.
1280 if (N.getOpcode() != ISD::ADD && N.getOpcode() != ISD::SUB &&
1281 !CurDAG->isBaseWithConstantOffset(N)) {
1282 if (N.getOpcode() == ISD::FrameIndex) {
1283 // Match frame index.
1284 int FI = cast<FrameIndexSDNode>(N)->getIndex();
1285 Base = CurDAG->getTargetFrameIndex(
1286 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
1287 OffImm = CurDAG->getTargetConstant(0, SDLoc(N), MVT::i32);
1288 return true;
1289 }
1290
1291 if (N.getOpcode() == ARMISD::Wrapper &&
1292 N.getOperand(0).getOpcode() != ISD::TargetGlobalAddress &&
1293 N.getOperand(0).getOpcode() != ISD::TargetExternalSymbol &&
1294 N.getOperand(0).getOpcode() != ISD::TargetGlobalTLSAddress) {
1295 Base = N.getOperand(0);
1296 if (Base.getOpcode() == ISD::TargetConstantPool)
1297 return false; // We want to select t2LDRpci instead.
1298 } else
1299 Base = N;
1300 OffImm = CurDAG->getTargetConstant(0, SDLoc(N), MVT::i32);
1301 return true;
1302 }
1303
1304 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) {
1305 if (SelectT2AddrModeImm8(N, Base, OffImm))
1306 // Let t2LDRi8 handle (R - imm8).
1307 return false;
1308
1309 int RHSC = (int)RHS->getZExtValue();
1310 if (N.getOpcode() == ISD::SUB)
1311 RHSC = -RHSC;
1312
1313 if (RHSC >= 0 && RHSC < 0x1000) { // 12 bits (unsigned)
1314 Base = N.getOperand(0);
1315 if (Base.getOpcode() == ISD::FrameIndex) {
1316 int FI = cast<FrameIndexSDNode>(Base)->getIndex();
1317 Base = CurDAG->getTargetFrameIndex(
1318 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
1319 }
1320 OffImm = CurDAG->getTargetConstant(RHSC, SDLoc(N), MVT::i32);
1321 return true;
1322 }
1323 }
1324
1325 // Base only.
1326 Base = N;
1327 OffImm = CurDAG->getTargetConstant(0, SDLoc(N), MVT::i32);
1328 return true;
1329}
1330
1331template <unsigned Shift>
1332bool ARMDAGToDAGISel::SelectT2AddrModeImm8(SDValue N, SDValue &Base,
1333 SDValue &OffImm) {
1334 if (N.getOpcode() == ISD::SUB || CurDAG->isBaseWithConstantOffset(N)) {
1335 int RHSC;
1336 if (isScaledConstantInRange(N.getOperand(1), 1 << Shift, -255, 256, RHSC)) {
1337 Base = N.getOperand(0);
1338 if (Base.getOpcode() == ISD::FrameIndex) {
1339 int FI = cast<FrameIndexSDNode>(Base)->getIndex();
1340 Base = CurDAG->getTargetFrameIndex(
1341 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
1342 }
1343
1344 if (N.getOpcode() == ISD::SUB)
1345 RHSC = -RHSC;
1346 OffImm =
1347 CurDAG->getTargetConstant(RHSC * (1 << Shift), SDLoc(N), MVT::i32);
1348 return true;
1349 }
1350 }
1351
1352 // Base only.
1353 Base = N;
1354 OffImm = CurDAG->getTargetConstant(0, SDLoc(N), MVT::i32);
1355 return true;
1356}
1357
1358bool ARMDAGToDAGISel::SelectT2AddrModeImm8(SDValue N,
1359 SDValue &Base, SDValue &OffImm) {
1360 // Match simple R - imm8 operands.
1361 if (N.getOpcode() != ISD::ADD && N.getOpcode() != ISD::SUB &&
1362 !CurDAG->isBaseWithConstantOffset(N))
1363 return false;
1364
1365 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) {
1366 int RHSC = (int)RHS->getSExtValue();
1367 if (N.getOpcode() == ISD::SUB)
1368 RHSC = -RHSC;
1369
1370 if ((RHSC >= -255) && (RHSC < 0)) { // 8 bits (always negative)
1371 Base = N.getOperand(0);
1372 if (Base.getOpcode() == ISD::FrameIndex) {
1373 int FI = cast<FrameIndexSDNode>(Base)->getIndex();
1374 Base = CurDAG->getTargetFrameIndex(
1375 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
1376 }
1377 OffImm = CurDAG->getTargetConstant(RHSC, SDLoc(N), MVT::i32);
1378 return true;
1379 }
1380 }
1381
1382 return false;
1383}
1384
1385bool ARMDAGToDAGISel::SelectT2AddrModeImm8Offset(SDNode *Op, SDValue N,
1386 SDValue &OffImm){
1387 unsigned Opcode = Op->getOpcode();
1388 ISD::MemIndexedMode AM = (Opcode == ISD::LOAD)
1389 ? cast<LoadSDNode>(Op)->getAddressingMode()
1390 : cast<StoreSDNode>(Op)->getAddressingMode();
1391 int RHSC;
1392 if (isScaledConstantInRange(N, /*Scale=*/1, 0, 0x100, RHSC)) { // 8 bits.
1393 OffImm = ((AM == ISD::PRE_INC) || (AM == ISD::POST_INC))
1394 ? CurDAG->getTargetConstant(RHSC, SDLoc(N), MVT::i32)
1395 : CurDAG->getTargetConstant(-RHSC, SDLoc(N), MVT::i32);
1396 return true;
1397 }
1398
1399 return false;
1400}
1401
1402template <unsigned Shift>
1403bool ARMDAGToDAGISel::SelectT2AddrModeImm7(SDValue N, SDValue &Base,
1404 SDValue &OffImm) {
1405 if (N.getOpcode() == ISD::SUB || CurDAG->isBaseWithConstantOffset(N)) {
1406 int RHSC;
1407 if (isScaledConstantInRange(N.getOperand(1), 1 << Shift, -0x7f, 0x80,
1408 RHSC)) {
1409 Base = N.getOperand(0);
1410 if (Base.getOpcode() == ISD::FrameIndex) {
1411 int FI = cast<FrameIndexSDNode>(Base)->getIndex();
1412 Base = CurDAG->getTargetFrameIndex(
1413 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
1414 }
1415
1416 if (N.getOpcode() == ISD::SUB)
1417 RHSC = -RHSC;
1418 OffImm =
1419 CurDAG->getTargetConstant(RHSC * (1 << Shift), SDLoc(N), MVT::i32);
1420 return true;
1421 }
1422 }
1423
1424 // Base only.
1425 Base = N;
1426 OffImm = CurDAG->getTargetConstant(0, SDLoc(N), MVT::i32);
1427 return true;
1428}
1429
1430template <unsigned Shift>
1431bool ARMDAGToDAGISel::SelectT2AddrModeImm7Offset(SDNode *Op, SDValue N,
1432 SDValue &OffImm) {
1433 return SelectT2AddrModeImm7Offset(Op, N, OffImm, Shift);
1434}
1435
1436bool ARMDAGToDAGISel::SelectT2AddrModeImm7Offset(SDNode *Op, SDValue N,
1437 SDValue &OffImm,
1438 unsigned Shift) {
1439 unsigned Opcode = Op->getOpcode();
1440 ISD::MemIndexedMode AM;
1441 switch (Opcode) {
1442 case ISD::LOAD:
1443 AM = cast<LoadSDNode>(Op)->getAddressingMode();
1444 break;
1445 case ISD::STORE:
1446 AM = cast<StoreSDNode>(Op)->getAddressingMode();
1447 break;
1448 case ISD::MLOAD:
1449 AM = cast<MaskedLoadSDNode>(Op)->getAddressingMode();
1450 break;
1451 case ISD::MSTORE:
1452 AM = cast<MaskedStoreSDNode>(Op)->getAddressingMode();
1453 break;
1454 default:
1455 llvm_unreachable("Unexpected Opcode for Imm7Offset")::llvm::llvm_unreachable_internal("Unexpected Opcode for Imm7Offset"
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 1455);
1456 }
1457
1458 int RHSC;
1459 // 7 bit constant, shifted by Shift.
1460 if (isScaledConstantInRange(N, 1 << Shift, 0, 0x80, RHSC)) {
1461 OffImm =
1462 ((AM == ISD::PRE_INC) || (AM == ISD::POST_INC))
1463 ? CurDAG->getTargetConstant(RHSC * (1 << Shift), SDLoc(N), MVT::i32)
1464 : CurDAG->getTargetConstant(-RHSC * (1 << Shift), SDLoc(N),
1465 MVT::i32);
1466 return true;
1467 }
1468 return false;
1469}
1470
1471template <int Min, int Max>
1472bool ARMDAGToDAGISel::SelectImmediateInRange(SDValue N, SDValue &OffImm) {
1473 int Val;
1474 if (isScaledConstantInRange(N, 1, Min, Max, Val)) {
1475 OffImm = CurDAG->getTargetConstant(Val, SDLoc(N), MVT::i32);
1476 return true;
1477 }
1478 return false;
1479}
1480
1481bool ARMDAGToDAGISel::SelectT2AddrModeSoReg(SDValue N,
1482 SDValue &Base,
1483 SDValue &OffReg, SDValue &ShImm) {
1484 // (R - imm8) should be handled by t2LDRi8. The rest are handled by t2LDRi12.
1485 if (N.getOpcode() != ISD::ADD && !CurDAG->isBaseWithConstantOffset(N))
1486 return false;
1487
1488 // Leave (R + imm12) for t2LDRi12, (R - imm8) for t2LDRi8.
1489 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) {
1490 int RHSC = (int)RHS->getZExtValue();
1491 if (RHSC >= 0 && RHSC < 0x1000) // 12 bits (unsigned)
1492 return false;
1493 else if (RHSC < 0 && RHSC >= -255) // 8 bits
1494 return false;
1495 }
1496
1497 // Look for (R + R) or (R + (R << [1,2,3])).
1498 unsigned ShAmt = 0;
1499 Base = N.getOperand(0);
1500 OffReg = N.getOperand(1);
1501
1502 // Swap if it is ((R << c) + R).
1503 ARM_AM::ShiftOpc ShOpcVal = ARM_AM::getShiftOpcForNode(OffReg.getOpcode());
1504 if (ShOpcVal != ARM_AM::lsl) {
1505 ShOpcVal = ARM_AM::getShiftOpcForNode(Base.getOpcode());
1506 if (ShOpcVal == ARM_AM::lsl)
1507 std::swap(Base, OffReg);
1508 }
1509
1510 if (ShOpcVal == ARM_AM::lsl) {
1511 // Check to see if the RHS of the shift is a constant, if not, we can't fold
1512 // it.
1513 if (ConstantSDNode *Sh = dyn_cast<ConstantSDNode>(OffReg.getOperand(1))) {
1514 ShAmt = Sh->getZExtValue();
1515 if (ShAmt < 4 && isShifterOpProfitable(OffReg, ShOpcVal, ShAmt))
1516 OffReg = OffReg.getOperand(0);
1517 else {
1518 ShAmt = 0;
1519 }
1520 }
1521 }
1522
1523 // If OffReg is a multiply-by-constant and it's profitable to extract a shift
1524 // and use it in a shifted operand do so.
1525 if (OffReg.getOpcode() == ISD::MUL && N.hasOneUse()) {
1526 unsigned PowerOfTwo = 0;
1527 SDValue NewMulConst;
1528 if (canExtractShiftFromMul(OffReg, 3, PowerOfTwo, NewMulConst)) {
1529 HandleSDNode Handle(OffReg);
1530 replaceDAGValue(OffReg.getOperand(1), NewMulConst);
1531 OffReg = Handle.getValue();
1532 ShAmt = PowerOfTwo;
1533 }
1534 }
1535
1536 ShImm = CurDAG->getTargetConstant(ShAmt, SDLoc(N), MVT::i32);
1537
1538 return true;
1539}
1540
1541bool ARMDAGToDAGISel::SelectT2AddrModeExclusive(SDValue N, SDValue &Base,
1542 SDValue &OffImm) {
1543 // This *must* succeed since it's used for the irreplaceable ldrex and strex
1544 // instructions.
1545 Base = N;
1546 OffImm = CurDAG->getTargetConstant(0, SDLoc(N), MVT::i32);
1547
1548 if (N.getOpcode() != ISD::ADD || !CurDAG->isBaseWithConstantOffset(N))
1549 return true;
1550
1551 ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1));
1552 if (!RHS)
1553 return true;
1554
1555 uint32_t RHSC = (int)RHS->getZExtValue();
1556 if (RHSC > 1020 || RHSC % 4 != 0)
1557 return true;
1558
1559 Base = N.getOperand(0);
1560 if (Base.getOpcode() == ISD::FrameIndex) {
1561 int FI = cast<FrameIndexSDNode>(Base)->getIndex();
1562 Base = CurDAG->getTargetFrameIndex(
1563 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
1564 }
1565
1566 OffImm = CurDAG->getTargetConstant(RHSC/4, SDLoc(N), MVT::i32);
1567 return true;
1568}
1569
1570//===--------------------------------------------------------------------===//
1571
1572/// getAL - Returns a ARMCC::AL immediate node.
1573static inline SDValue getAL(SelectionDAG *CurDAG, const SDLoc &dl) {
1574 return CurDAG->getTargetConstant((uint64_t)ARMCC::AL, dl, MVT::i32);
1575}
1576
1577void ARMDAGToDAGISel::transferMemOperands(SDNode *N, SDNode *Result) {
1578 MachineMemOperand *MemOp = cast<MemSDNode>(N)->getMemOperand();
1579 CurDAG->setNodeMemRefs(cast<MachineSDNode>(Result), {MemOp});
1580}
1581
1582bool ARMDAGToDAGISel::tryARMIndexedLoad(SDNode *N) {
1583 LoadSDNode *LD = cast<LoadSDNode>(N);
1584 ISD::MemIndexedMode AM = LD->getAddressingMode();
1585 if (AM == ISD::UNINDEXED)
1586 return false;
1587
1588 EVT LoadedVT = LD->getMemoryVT();
1589 SDValue Offset, AMOpc;
1590 bool isPre = (AM == ISD::PRE_INC) || (AM == ISD::PRE_DEC);
1591 unsigned Opcode = 0;
1592 bool Match = false;
1593 if (LoadedVT == MVT::i32 && isPre &&
1594 SelectAddrMode2OffsetImmPre(N, LD->getOffset(), Offset, AMOpc)) {
1595 Opcode = ARM::LDR_PRE_IMM;
1596 Match = true;
1597 } else if (LoadedVT == MVT::i32 && !isPre &&
1598 SelectAddrMode2OffsetImm(N, LD->getOffset(), Offset, AMOpc)) {
1599 Opcode = ARM::LDR_POST_IMM;
1600 Match = true;
1601 } else if (LoadedVT == MVT::i32 &&
1602 SelectAddrMode2OffsetReg(N, LD->getOffset(), Offset, AMOpc)) {
1603 Opcode = isPre ? ARM::LDR_PRE_REG : ARM::LDR_POST_REG;
1604 Match = true;
1605
1606 } else if (LoadedVT == MVT::i16 &&
1607 SelectAddrMode3Offset(N, LD->getOffset(), Offset, AMOpc)) {
1608 Match = true;
1609 Opcode = (LD->getExtensionType() == ISD::SEXTLOAD)
1610 ? (isPre ? ARM::LDRSH_PRE : ARM::LDRSH_POST)
1611 : (isPre ? ARM::LDRH_PRE : ARM::LDRH_POST);
1612 } else if (LoadedVT == MVT::i8 || LoadedVT == MVT::i1) {
1613 if (LD->getExtensionType() == ISD::SEXTLOAD) {
1614 if (SelectAddrMode3Offset(N, LD->getOffset(), Offset, AMOpc)) {
1615 Match = true;
1616 Opcode = isPre ? ARM::LDRSB_PRE : ARM::LDRSB_POST;
1617 }
1618 } else {
1619 if (isPre &&
1620 SelectAddrMode2OffsetImmPre(N, LD->getOffset(), Offset, AMOpc)) {
1621 Match = true;
1622 Opcode = ARM::LDRB_PRE_IMM;
1623 } else if (!isPre &&
1624 SelectAddrMode2OffsetImm(N, LD->getOffset(), Offset, AMOpc)) {
1625 Match = true;
1626 Opcode = ARM::LDRB_POST_IMM;
1627 } else if (SelectAddrMode2OffsetReg(N, LD->getOffset(), Offset, AMOpc)) {
1628 Match = true;
1629 Opcode = isPre ? ARM::LDRB_PRE_REG : ARM::LDRB_POST_REG;
1630 }
1631 }
1632 }
1633
1634 if (Match) {
1635 if (Opcode == ARM::LDR_PRE_IMM || Opcode == ARM::LDRB_PRE_IMM) {
1636 SDValue Chain = LD->getChain();
1637 SDValue Base = LD->getBasePtr();
1638 SDValue Ops[]= { Base, AMOpc, getAL(CurDAG, SDLoc(N)),
1639 CurDAG->getRegister(0, MVT::i32), Chain };
1640 SDNode *New = CurDAG->getMachineNode(Opcode, SDLoc(N), MVT::i32, MVT::i32,
1641 MVT::Other, Ops);
1642 transferMemOperands(N, New);
1643 ReplaceNode(N, New);
1644 return true;
1645 } else {
1646 SDValue Chain = LD->getChain();
1647 SDValue Base = LD->getBasePtr();
1648 SDValue Ops[]= { Base, Offset, AMOpc, getAL(CurDAG, SDLoc(N)),
1649 CurDAG->getRegister(0, MVT::i32), Chain };
1650 SDNode *New = CurDAG->getMachineNode(Opcode, SDLoc(N), MVT::i32, MVT::i32,
1651 MVT::Other, Ops);
1652 transferMemOperands(N, New);
1653 ReplaceNode(N, New);
1654 return true;
1655 }
1656 }
1657
1658 return false;
1659}
1660
1661bool ARMDAGToDAGISel::tryT1IndexedLoad(SDNode *N) {
1662 LoadSDNode *LD = cast<LoadSDNode>(N);
1663 EVT LoadedVT = LD->getMemoryVT();
1664 ISD::MemIndexedMode AM = LD->getAddressingMode();
1665 if (AM != ISD::POST_INC || LD->getExtensionType() != ISD::NON_EXTLOAD ||
1666 LoadedVT.getSimpleVT().SimpleTy != MVT::i32)
1667 return false;
1668
1669 auto *COffs = dyn_cast<ConstantSDNode>(LD->getOffset());
1670 if (!COffs || COffs->getZExtValue() != 4)
1671 return false;
1672
1673 // A T1 post-indexed load is just a single register LDM: LDM r0!, {r1}.
1674 // The encoding of LDM is not how the rest of ISel expects a post-inc load to
1675 // look however, so we use a pseudo here and switch it for a tLDMIA_UPD after
1676 // ISel.
1677 SDValue Chain = LD->getChain();
1678 SDValue Base = LD->getBasePtr();
1679 SDValue Ops[]= { Base, getAL(CurDAG, SDLoc(N)),
1680 CurDAG->getRegister(0, MVT::i32), Chain };
1681 SDNode *New = CurDAG->getMachineNode(ARM::tLDR_postidx, SDLoc(N), MVT::i32,
1682 MVT::i32, MVT::Other, Ops);
1683 transferMemOperands(N, New);
1684 ReplaceNode(N, New);
1685 return true;
1686}
1687
1688bool ARMDAGToDAGISel::tryT2IndexedLoad(SDNode *N) {
1689 LoadSDNode *LD = cast<LoadSDNode>(N);
1690 ISD::MemIndexedMode AM = LD->getAddressingMode();
1691 if (AM == ISD::UNINDEXED)
1692 return false;
1693
1694 EVT LoadedVT = LD->getMemoryVT();
1695 bool isSExtLd = LD->getExtensionType() == ISD::SEXTLOAD;
1696 SDValue Offset;
1697 bool isPre = (AM == ISD::PRE_INC) || (AM == ISD::PRE_DEC);
1698 unsigned Opcode = 0;
1699 bool Match = false;
1700 if (SelectT2AddrModeImm8Offset(N, LD->getOffset(), Offset)) {
1701 switch (LoadedVT.getSimpleVT().SimpleTy) {
1702 case MVT::i32:
1703 Opcode = isPre ? ARM::t2LDR_PRE : ARM::t2LDR_POST;
1704 break;
1705 case MVT::i16:
1706 if (isSExtLd)
1707 Opcode = isPre ? ARM::t2LDRSH_PRE : ARM::t2LDRSH_POST;
1708 else
1709 Opcode = isPre ? ARM::t2LDRH_PRE : ARM::t2LDRH_POST;
1710 break;
1711 case MVT::i8:
1712 case MVT::i1:
1713 if (isSExtLd)
1714 Opcode = isPre ? ARM::t2LDRSB_PRE : ARM::t2LDRSB_POST;
1715 else
1716 Opcode = isPre ? ARM::t2LDRB_PRE : ARM::t2LDRB_POST;
1717 break;
1718 default:
1719 return false;
1720 }
1721 Match = true;
1722 }
1723
1724 if (Match) {
1725 SDValue Chain = LD->getChain();
1726 SDValue Base = LD->getBasePtr();
1727 SDValue Ops[]= { Base, Offset, getAL(CurDAG, SDLoc(N)),
1728 CurDAG->getRegister(0, MVT::i32), Chain };
1729 SDNode *New = CurDAG->getMachineNode(Opcode, SDLoc(N), MVT::i32, MVT::i32,
1730 MVT::Other, Ops);
1731 transferMemOperands(N, New);
1732 ReplaceNode(N, New);
1733 return true;
1734 }
1735
1736 return false;
1737}
1738
1739bool ARMDAGToDAGISel::tryMVEIndexedLoad(SDNode *N) {
1740 EVT LoadedVT;
1741 unsigned Opcode = 0;
1742 bool isSExtLd, isPre;
1743 Align Alignment;
1744 ARMVCC::VPTCodes Pred;
1745 SDValue PredReg;
1746 SDValue Chain, Base, Offset;
1747
1748 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
1749 ISD::MemIndexedMode AM = LD->getAddressingMode();
1750 if (AM == ISD::UNINDEXED)
1751 return false;
1752 LoadedVT = LD->getMemoryVT();
1753 if (!LoadedVT.isVector())
1754 return false;
1755
1756 Chain = LD->getChain();
1757 Base = LD->getBasePtr();
1758 Offset = LD->getOffset();
1759 Alignment = LD->getAlign();
1760 isSExtLd = LD->getExtensionType() == ISD::SEXTLOAD;
1761 isPre = (AM == ISD::PRE_INC) || (AM == ISD::PRE_DEC);
1762 Pred = ARMVCC::None;
1763 PredReg = CurDAG->getRegister(0, MVT::i32);
1764 } else if (MaskedLoadSDNode *LD = dyn_cast<MaskedLoadSDNode>(N)) {
1765 ISD::MemIndexedMode AM = LD->getAddressingMode();
1766 if (AM == ISD::UNINDEXED)
1767 return false;
1768 LoadedVT = LD->getMemoryVT();
1769 if (!LoadedVT.isVector())
1770 return false;
1771
1772 Chain = LD->getChain();
1773 Base = LD->getBasePtr();
1774 Offset = LD->getOffset();
1775 Alignment = LD->getAlign();
1776 isSExtLd = LD->getExtensionType() == ISD::SEXTLOAD;
1777 isPre = (AM == ISD::PRE_INC) || (AM == ISD::PRE_DEC);
1778 Pred = ARMVCC::Then;
1779 PredReg = LD->getMask();
1780 } else
1781 llvm_unreachable("Expected a Load or a Masked Load!")::llvm::llvm_unreachable_internal("Expected a Load or a Masked Load!"
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 1781);
1782
1783 // We allow LE non-masked loads to change the type (for example use a vldrb.8
1784 // as opposed to a vldrw.32). This can allow extra addressing modes or
1785 // alignments for what is otherwise an equivalent instruction.
1786 bool CanChangeType = Subtarget->isLittle() && !isa<MaskedLoadSDNode>(N);
1787
1788 SDValue NewOffset;
1789 if (Alignment >= Align(2) && LoadedVT == MVT::v4i16 &&
1790 SelectT2AddrModeImm7Offset(N, Offset, NewOffset, 1)) {
1791 if (isSExtLd)
1792 Opcode = isPre ? ARM::MVE_VLDRHS32_pre : ARM::MVE_VLDRHS32_post;
1793 else
1794 Opcode = isPre ? ARM::MVE_VLDRHU32_pre : ARM::MVE_VLDRHU32_post;
1795 } else if (LoadedVT == MVT::v8i8 &&
1796 SelectT2AddrModeImm7Offset(N, Offset, NewOffset, 0)) {
1797 if (isSExtLd)
1798 Opcode = isPre ? ARM::MVE_VLDRBS16_pre : ARM::MVE_VLDRBS16_post;
1799 else
1800 Opcode = isPre ? ARM::MVE_VLDRBU16_pre : ARM::MVE_VLDRBU16_post;
1801 } else if (LoadedVT == MVT::v4i8 &&
1802 SelectT2AddrModeImm7Offset(N, Offset, NewOffset, 0)) {
1803 if (isSExtLd)
1804 Opcode = isPre ? ARM::MVE_VLDRBS32_pre : ARM::MVE_VLDRBS32_post;
1805 else
1806 Opcode = isPre ? ARM::MVE_VLDRBU32_pre : ARM::MVE_VLDRBU32_post;
1807 } else if (Alignment >= Align(4) &&
1808 (CanChangeType || LoadedVT == MVT::v4i32 ||
1809 LoadedVT == MVT::v4f32) &&
1810 SelectT2AddrModeImm7Offset(N, Offset, NewOffset, 2))
1811 Opcode = isPre ? ARM::MVE_VLDRWU32_pre : ARM::MVE_VLDRWU32_post;
1812 else if (Alignment >= Align(2) &&
1813 (CanChangeType || LoadedVT == MVT::v8i16 ||
1814 LoadedVT == MVT::v8f16) &&
1815 SelectT2AddrModeImm7Offset(N, Offset, NewOffset, 1))
1816 Opcode = isPre ? ARM::MVE_VLDRHU16_pre : ARM::MVE_VLDRHU16_post;
1817 else if ((CanChangeType || LoadedVT == MVT::v16i8) &&
1818 SelectT2AddrModeImm7Offset(N, Offset, NewOffset, 0))
1819 Opcode = isPre ? ARM::MVE_VLDRBU8_pre : ARM::MVE_VLDRBU8_post;
1820 else
1821 return false;
1822
1823 SDValue Ops[] = {Base,
1824 NewOffset,
1825 CurDAG->getTargetConstant(Pred, SDLoc(N), MVT::i32),
1826 PredReg,
1827 CurDAG->getRegister(0, MVT::i32), // tp_reg
1828 Chain};
1829 SDNode *New = CurDAG->getMachineNode(Opcode, SDLoc(N), MVT::i32,
1830 N->getValueType(0), MVT::Other, Ops);
1831 transferMemOperands(N, New);
1832 ReplaceUses(SDValue(N, 0), SDValue(New, 1));
1833 ReplaceUses(SDValue(N, 1), SDValue(New, 0));
1834 ReplaceUses(SDValue(N, 2), SDValue(New, 2));
1835 CurDAG->RemoveDeadNode(N);
1836 return true;
1837}
1838
1839/// Form a GPRPair pseudo register from a pair of GPR regs.
1840SDNode *ARMDAGToDAGISel::createGPRPairNode(EVT VT, SDValue V0, SDValue V1) {
1841 SDLoc dl(V0.getNode());
1842 SDValue RegClass =
1843 CurDAG->getTargetConstant(ARM::GPRPairRegClassID, dl, MVT::i32);
1844 SDValue SubReg0 = CurDAG->getTargetConstant(ARM::gsub_0, dl, MVT::i32);
1845 SDValue SubReg1 = CurDAG->getTargetConstant(ARM::gsub_1, dl, MVT::i32);
1846 const SDValue Ops[] = { RegClass, V0, SubReg0, V1, SubReg1 };
1847 return CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, dl, VT, Ops);
1848}
1849
1850/// Form a D register from a pair of S registers.
1851SDNode *ARMDAGToDAGISel::createSRegPairNode(EVT VT, SDValue V0, SDValue V1) {
1852 SDLoc dl(V0.getNode());
1853 SDValue RegClass =
1854 CurDAG->getTargetConstant(ARM::DPR_VFP2RegClassID, dl, MVT::i32);
1855 SDValue SubReg0 = CurDAG->getTargetConstant(ARM::ssub_0, dl, MVT::i32);
1856 SDValue SubReg1 = CurDAG->getTargetConstant(ARM::ssub_1, dl, MVT::i32);
1857 const SDValue Ops[] = { RegClass, V0, SubReg0, V1, SubReg1 };
1858 return CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, dl, VT, Ops);
1859}
1860
1861/// Form a quad register from a pair of D registers.
1862SDNode *ARMDAGToDAGISel::createDRegPairNode(EVT VT, SDValue V0, SDValue V1) {
1863 SDLoc dl(V0.getNode());
1864 SDValue RegClass = CurDAG->getTargetConstant(ARM::QPRRegClassID, dl,
1865 MVT::i32);
1866 SDValue SubReg0 = CurDAG->getTargetConstant(ARM::dsub_0, dl, MVT::i32);
1867 SDValue SubReg1 = CurDAG->getTargetConstant(ARM::dsub_1, dl, MVT::i32);
1868 const SDValue Ops[] = { RegClass, V0, SubReg0, V1, SubReg1 };
1869 return CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, dl, VT, Ops);
1870}
1871
1872/// Form 4 consecutive D registers from a pair of Q registers.
1873SDNode *ARMDAGToDAGISel::createQRegPairNode(EVT VT, SDValue V0, SDValue V1) {
1874 SDLoc dl(V0.getNode());
1875 SDValue RegClass = CurDAG->getTargetConstant(ARM::QQPRRegClassID, dl,
1876 MVT::i32);
1877 SDValue SubReg0 = CurDAG->getTargetConstant(ARM::qsub_0, dl, MVT::i32);
1878 SDValue SubReg1 = CurDAG->getTargetConstant(ARM::qsub_1, dl, MVT::i32);
1879 const SDValue Ops[] = { RegClass, V0, SubReg0, V1, SubReg1 };
1880 return CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, dl, VT, Ops);
1881}
1882
1883/// Form 4 consecutive S registers.
1884SDNode *ARMDAGToDAGISel::createQuadSRegsNode(EVT VT, SDValue V0, SDValue V1,
1885 SDValue V2, SDValue V3) {
1886 SDLoc dl(V0.getNode());
1887 SDValue RegClass =
1888 CurDAG->getTargetConstant(ARM::QPR_VFP2RegClassID, dl, MVT::i32);
1889 SDValue SubReg0 = CurDAG->getTargetConstant(ARM::ssub_0, dl, MVT::i32);
1890 SDValue SubReg1 = CurDAG->getTargetConstant(ARM::ssub_1, dl, MVT::i32);
1891 SDValue SubReg2 = CurDAG->getTargetConstant(ARM::ssub_2, dl, MVT::i32);
1892 SDValue SubReg3 = CurDAG->getTargetConstant(ARM::ssub_3, dl, MVT::i32);
1893 const SDValue Ops[] = { RegClass, V0, SubReg0, V1, SubReg1,
1894 V2, SubReg2, V3, SubReg3 };
1895 return CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, dl, VT, Ops);
1896}
1897
1898/// Form 4 consecutive D registers.
1899SDNode *ARMDAGToDAGISel::createQuadDRegsNode(EVT VT, SDValue V0, SDValue V1,
1900 SDValue V2, SDValue V3) {
1901 SDLoc dl(V0.getNode());
1902 SDValue RegClass = CurDAG->getTargetConstant(ARM::QQPRRegClassID, dl,
1903 MVT::i32);
1904 SDValue SubReg0 = CurDAG->getTargetConstant(ARM::dsub_0, dl, MVT::i32);
1905 SDValue SubReg1 = CurDAG->getTargetConstant(ARM::dsub_1, dl, MVT::i32);
1906 SDValue SubReg2 = CurDAG->getTargetConstant(ARM::dsub_2, dl, MVT::i32);
1907 SDValue SubReg3 = CurDAG->getTargetConstant(ARM::dsub_3, dl, MVT::i32);
1908 const SDValue Ops[] = { RegClass, V0, SubReg0, V1, SubReg1,
1909 V2, SubReg2, V3, SubReg3 };
1910 return CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, dl, VT, Ops);
1911}
1912
1913/// Form 4 consecutive Q registers.
1914SDNode *ARMDAGToDAGISel::createQuadQRegsNode(EVT VT, SDValue V0, SDValue V1,
1915 SDValue V2, SDValue V3) {
1916 SDLoc dl(V0.getNode());
1917 SDValue RegClass = CurDAG->getTargetConstant(ARM::QQQQPRRegClassID, dl,
1918 MVT::i32);
1919 SDValue SubReg0 = CurDAG->getTargetConstant(ARM::qsub_0, dl, MVT::i32);
1920 SDValue SubReg1 = CurDAG->getTargetConstant(ARM::qsub_1, dl, MVT::i32);
1921 SDValue SubReg2 = CurDAG->getTargetConstant(ARM::qsub_2, dl, MVT::i32);
1922 SDValue SubReg3 = CurDAG->getTargetConstant(ARM::qsub_3, dl, MVT::i32);
1923 const SDValue Ops[] = { RegClass, V0, SubReg0, V1, SubReg1,
1924 V2, SubReg2, V3, SubReg3 };
1925 return CurDAG->getMachineNode(TargetOpcode::REG_SEQUENCE, dl, VT, Ops);
1926}
1927
1928/// GetVLDSTAlign - Get the alignment (in bytes) for the alignment operand
1929/// of a NEON VLD or VST instruction. The supported values depend on the
1930/// number of registers being loaded.
1931SDValue ARMDAGToDAGISel::GetVLDSTAlign(SDValue Align, const SDLoc &dl,
1932 unsigned NumVecs, bool is64BitVector) {
1933 unsigned NumRegs = NumVecs;
1934 if (!is64BitVector && NumVecs < 3)
1935 NumRegs *= 2;
1936
1937 unsigned Alignment = cast<ConstantSDNode>(Align)->getZExtValue();
1938 if (Alignment >= 32 && NumRegs == 4)
1939 Alignment = 32;
1940 else if (Alignment >= 16 && (NumRegs == 2 || NumRegs == 4))
1941 Alignment = 16;
1942 else if (Alignment >= 8)
1943 Alignment = 8;
1944 else
1945 Alignment = 0;
1946
1947 return CurDAG->getTargetConstant(Alignment, dl, MVT::i32);
1948}
1949
1950static bool isVLDfixed(unsigned Opc)
1951{
1952 switch (Opc) {
1953 default: return false;
1954 case ARM::VLD1d8wb_fixed : return true;
1955 case ARM::VLD1d16wb_fixed : return true;
1956 case ARM::VLD1d64Qwb_fixed : return true;
1957 case ARM::VLD1d32wb_fixed : return true;
1958 case ARM::VLD1d64wb_fixed : return true;
1959 case ARM::VLD1d8TPseudoWB_fixed : return true;
1960 case ARM::VLD1d16TPseudoWB_fixed : return true;
1961 case ARM::VLD1d32TPseudoWB_fixed : return true;
1962 case ARM::VLD1d64TPseudoWB_fixed : return true;
1963 case ARM::VLD1d8QPseudoWB_fixed : return true;
1964 case ARM::VLD1d16QPseudoWB_fixed : return true;
1965 case ARM::VLD1d32QPseudoWB_fixed : return true;
1966 case ARM::VLD1d64QPseudoWB_fixed : return true;
1967 case ARM::VLD1q8wb_fixed : return true;
1968 case ARM::VLD1q16wb_fixed : return true;
1969 case ARM::VLD1q32wb_fixed : return true;
1970 case ARM::VLD1q64wb_fixed : return true;
1971 case ARM::VLD1DUPd8wb_fixed : return true;
1972 case ARM::VLD1DUPd16wb_fixed : return true;
1973 case ARM::VLD1DUPd32wb_fixed : return true;
1974 case ARM::VLD1DUPq8wb_fixed : return true;
1975 case ARM::VLD1DUPq16wb_fixed : return true;
1976 case ARM::VLD1DUPq32wb_fixed : return true;
1977 case ARM::VLD2d8wb_fixed : return true;
1978 case ARM::VLD2d16wb_fixed : return true;
1979 case ARM::VLD2d32wb_fixed : return true;
1980 case ARM::VLD2q8PseudoWB_fixed : return true;
1981 case ARM::VLD2q16PseudoWB_fixed : return true;
1982 case ARM::VLD2q32PseudoWB_fixed : return true;
1983 case ARM::VLD2DUPd8wb_fixed : return true;
1984 case ARM::VLD2DUPd16wb_fixed : return true;
1985 case ARM::VLD2DUPd32wb_fixed : return true;
1986 case ARM::VLD2DUPq8OddPseudoWB_fixed: return true;
1987 case ARM::VLD2DUPq16OddPseudoWB_fixed: return true;
1988 case ARM::VLD2DUPq32OddPseudoWB_fixed: return true;
1989 }
1990}
1991
1992static bool isVSTfixed(unsigned Opc)
1993{
1994 switch (Opc) {
1995 default: return false;
1996 case ARM::VST1d8wb_fixed : return true;
1997 case ARM::VST1d16wb_fixed : return true;
1998 case ARM::VST1d32wb_fixed : return true;
1999 case ARM::VST1d64wb_fixed : return true;
2000 case ARM::VST1q8wb_fixed : return true;
2001 case ARM::VST1q16wb_fixed : return true;
2002 case ARM::VST1q32wb_fixed : return true;
2003 case ARM::VST1q64wb_fixed : return true;
2004 case ARM::VST1d8TPseudoWB_fixed : return true;
2005 case ARM::VST1d16TPseudoWB_fixed : return true;
2006 case ARM::VST1d32TPseudoWB_fixed : return true;
2007 case ARM::VST1d64TPseudoWB_fixed : return true;
2008 case ARM::VST1d8QPseudoWB_fixed : return true;
2009 case ARM::VST1d16QPseudoWB_fixed : return true;
2010 case ARM::VST1d32QPseudoWB_fixed : return true;
2011 case ARM::VST1d64QPseudoWB_fixed : return true;
2012 case ARM::VST2d8wb_fixed : return true;
2013 case ARM::VST2d16wb_fixed : return true;
2014 case ARM::VST2d32wb_fixed : return true;
2015 case ARM::VST2q8PseudoWB_fixed : return true;
2016 case ARM::VST2q16PseudoWB_fixed : return true;
2017 case ARM::VST2q32PseudoWB_fixed : return true;
2018 }
2019}
2020
2021// Get the register stride update opcode of a VLD/VST instruction that
2022// is otherwise equivalent to the given fixed stride updating instruction.
2023static unsigned getVLDSTRegisterUpdateOpcode(unsigned Opc) {
2024 assert((isVLDfixed(Opc) || isVSTfixed(Opc))(static_cast <bool> ((isVLDfixed(Opc) || isVSTfixed(Opc
)) && "Incorrect fixed stride updating instruction.")
? void (0) : __assert_fail ("(isVLDfixed(Opc) || isVSTfixed(Opc)) && \"Incorrect fixed stride updating instruction.\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2025, __extension__
__PRETTY_FUNCTION__))
2025 && "Incorrect fixed stride updating instruction.")(static_cast <bool> ((isVLDfixed(Opc) || isVSTfixed(Opc
)) && "Incorrect fixed stride updating instruction.")
? void (0) : __assert_fail ("(isVLDfixed(Opc) || isVSTfixed(Opc)) && \"Incorrect fixed stride updating instruction.\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2025, __extension__
__PRETTY_FUNCTION__));
2026 switch (Opc) {
2027 default: break;
2028 case ARM::VLD1d8wb_fixed: return ARM::VLD1d8wb_register;
2029 case ARM::VLD1d16wb_fixed: return ARM::VLD1d16wb_register;
2030 case ARM::VLD1d32wb_fixed: return ARM::VLD1d32wb_register;
2031 case ARM::VLD1d64wb_fixed: return ARM::VLD1d64wb_register;
2032 case ARM::VLD1q8wb_fixed: return ARM::VLD1q8wb_register;
2033 case ARM::VLD1q16wb_fixed: return ARM::VLD1q16wb_register;
2034 case ARM::VLD1q32wb_fixed: return ARM::VLD1q32wb_register;
2035 case ARM::VLD1q64wb_fixed: return ARM::VLD1q64wb_register;
2036 case ARM::VLD1d64Twb_fixed: return ARM::VLD1d64Twb_register;
2037 case ARM::VLD1d64Qwb_fixed: return ARM::VLD1d64Qwb_register;
2038 case ARM::VLD1d8TPseudoWB_fixed: return ARM::VLD1d8TPseudoWB_register;
2039 case ARM::VLD1d16TPseudoWB_fixed: return ARM::VLD1d16TPseudoWB_register;
2040 case ARM::VLD1d32TPseudoWB_fixed: return ARM::VLD1d32TPseudoWB_register;
2041 case ARM::VLD1d64TPseudoWB_fixed: return ARM::VLD1d64TPseudoWB_register;
2042 case ARM::VLD1d8QPseudoWB_fixed: return ARM::VLD1d8QPseudoWB_register;
2043 case ARM::VLD1d16QPseudoWB_fixed: return ARM::VLD1d16QPseudoWB_register;
2044 case ARM::VLD1d32QPseudoWB_fixed: return ARM::VLD1d32QPseudoWB_register;
2045 case ARM::VLD1d64QPseudoWB_fixed: return ARM::VLD1d64QPseudoWB_register;
2046 case ARM::VLD1DUPd8wb_fixed : return ARM::VLD1DUPd8wb_register;
2047 case ARM::VLD1DUPd16wb_fixed : return ARM::VLD1DUPd16wb_register;
2048 case ARM::VLD1DUPd32wb_fixed : return ARM::VLD1DUPd32wb_register;
2049 case ARM::VLD1DUPq8wb_fixed : return ARM::VLD1DUPq8wb_register;
2050 case ARM::VLD1DUPq16wb_fixed : return ARM::VLD1DUPq16wb_register;
2051 case ARM::VLD1DUPq32wb_fixed : return ARM::VLD1DUPq32wb_register;
2052 case ARM::VLD2DUPq8OddPseudoWB_fixed: return ARM::VLD2DUPq8OddPseudoWB_register;
2053 case ARM::VLD2DUPq16OddPseudoWB_fixed: return ARM::VLD2DUPq16OddPseudoWB_register;
2054 case ARM::VLD2DUPq32OddPseudoWB_fixed: return ARM::VLD2DUPq32OddPseudoWB_register;
2055
2056 case ARM::VST1d8wb_fixed: return ARM::VST1d8wb_register;
2057 case ARM::VST1d16wb_fixed: return ARM::VST1d16wb_register;
2058 case ARM::VST1d32wb_fixed: return ARM::VST1d32wb_register;
2059 case ARM::VST1d64wb_fixed: return ARM::VST1d64wb_register;
2060 case ARM::VST1q8wb_fixed: return ARM::VST1q8wb_register;
2061 case ARM::VST1q16wb_fixed: return ARM::VST1q16wb_register;
2062 case ARM::VST1q32wb_fixed: return ARM::VST1q32wb_register;
2063 case ARM::VST1q64wb_fixed: return ARM::VST1q64wb_register;
2064 case ARM::VST1d8TPseudoWB_fixed: return ARM::VST1d8TPseudoWB_register;
2065 case ARM::VST1d16TPseudoWB_fixed: return ARM::VST1d16TPseudoWB_register;
2066 case ARM::VST1d32TPseudoWB_fixed: return ARM::VST1d32TPseudoWB_register;
2067 case ARM::VST1d64TPseudoWB_fixed: return ARM::VST1d64TPseudoWB_register;
2068 case ARM::VST1d8QPseudoWB_fixed: return ARM::VST1d8QPseudoWB_register;
2069 case ARM::VST1d16QPseudoWB_fixed: return ARM::VST1d16QPseudoWB_register;
2070 case ARM::VST1d32QPseudoWB_fixed: return ARM::VST1d32QPseudoWB_register;
2071 case ARM::VST1d64QPseudoWB_fixed: return ARM::VST1d64QPseudoWB_register;
2072
2073 case ARM::VLD2d8wb_fixed: return ARM::VLD2d8wb_register;
2074 case ARM::VLD2d16wb_fixed: return ARM::VLD2d16wb_register;
2075 case ARM::VLD2d32wb_fixed: return ARM::VLD2d32wb_register;
2076 case ARM::VLD2q8PseudoWB_fixed: return ARM::VLD2q8PseudoWB_register;
2077 case ARM::VLD2q16PseudoWB_fixed: return ARM::VLD2q16PseudoWB_register;
2078 case ARM::VLD2q32PseudoWB_fixed: return ARM::VLD2q32PseudoWB_register;
2079
2080 case ARM::VST2d8wb_fixed: return ARM::VST2d8wb_register;
2081 case ARM::VST2d16wb_fixed: return ARM::VST2d16wb_register;
2082 case ARM::VST2d32wb_fixed: return ARM::VST2d32wb_register;
2083 case ARM::VST2q8PseudoWB_fixed: return ARM::VST2q8PseudoWB_register;
2084 case ARM::VST2q16PseudoWB_fixed: return ARM::VST2q16PseudoWB_register;
2085 case ARM::VST2q32PseudoWB_fixed: return ARM::VST2q32PseudoWB_register;
2086
2087 case ARM::VLD2DUPd8wb_fixed: return ARM::VLD2DUPd8wb_register;
2088 case ARM::VLD2DUPd16wb_fixed: return ARM::VLD2DUPd16wb_register;
2089 case ARM::VLD2DUPd32wb_fixed: return ARM::VLD2DUPd32wb_register;
2090 }
2091 return Opc; // If not one we handle, return it unchanged.
2092}
2093
2094/// Returns true if the given increment is a Constant known to be equal to the
2095/// access size performed by a NEON load/store. This means the "[rN]!" form can
2096/// be used.
2097static bool isPerfectIncrement(SDValue Inc, EVT VecTy, unsigned NumVecs) {
2098 auto C = dyn_cast<ConstantSDNode>(Inc);
2099 return C && C->getZExtValue() == VecTy.getSizeInBits() / 8 * NumVecs;
2100}
2101
2102void ARMDAGToDAGISel::SelectVLD(SDNode *N, bool isUpdating, unsigned NumVecs,
2103 const uint16_t *DOpcodes,
2104 const uint16_t *QOpcodes0,
2105 const uint16_t *QOpcodes1) {
2106 assert(Subtarget->hasNEON())(static_cast <bool> (Subtarget->hasNEON()) ? void (0
) : __assert_fail ("Subtarget->hasNEON()", "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp"
, 2106, __extension__ __PRETTY_FUNCTION__));
2107 assert(NumVecs >= 1 && NumVecs <= 4 && "VLD NumVecs out-of-range")(static_cast <bool> (NumVecs >= 1 && NumVecs
<= 4 && "VLD NumVecs out-of-range") ? void (0) : __assert_fail
("NumVecs >= 1 && NumVecs <= 4 && \"VLD NumVecs out-of-range\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2107, __extension__
__PRETTY_FUNCTION__));
2108 SDLoc dl(N);
2109
2110 SDValue MemAddr, Align;
2111 bool IsIntrinsic = !isUpdating; // By coincidence, all supported updating
2112 // nodes are not intrinsics.
2113 unsigned AddrOpIdx = IsIntrinsic ? 2 : 1;
2114 if (!SelectAddrMode6(N, N->getOperand(AddrOpIdx), MemAddr, Align))
2115 return;
2116
2117 SDValue Chain = N->getOperand(0);
2118 EVT VT = N->getValueType(0);
2119 bool is64BitVector = VT.is64BitVector();
2120 Align = GetVLDSTAlign(Align, dl, NumVecs, is64BitVector);
2121
2122 unsigned OpcodeIndex;
2123 switch (VT.getSimpleVT().SimpleTy) {
2124 default: llvm_unreachable("unhandled vld type")::llvm::llvm_unreachable_internal("unhandled vld type", "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp"
, 2124);
2125 // Double-register operations:
2126 case MVT::v8i8: OpcodeIndex = 0; break;
2127 case MVT::v4f16:
2128 case MVT::v4bf16:
2129 case MVT::v4i16: OpcodeIndex = 1; break;
2130 case MVT::v2f32:
2131 case MVT::v2i32: OpcodeIndex = 2; break;
2132 case MVT::v1i64: OpcodeIndex = 3; break;
2133 // Quad-register operations:
2134 case MVT::v16i8: OpcodeIndex = 0; break;
2135 case MVT::v8f16:
2136 case MVT::v8bf16:
2137 case MVT::v8i16: OpcodeIndex = 1; break;
2138 case MVT::v4f32:
2139 case MVT::v4i32: OpcodeIndex = 2; break;
2140 case MVT::v2f64:
2141 case MVT::v2i64: OpcodeIndex = 3; break;
2142 }
2143
2144 EVT ResTy;
2145 if (NumVecs == 1)
2146 ResTy = VT;
2147 else {
2148 unsigned ResTyElts = (NumVecs == 3) ? 4 : NumVecs;
2149 if (!is64BitVector)
2150 ResTyElts *= 2;
2151 ResTy = EVT::getVectorVT(*CurDAG->getContext(), MVT::i64, ResTyElts);
2152 }
2153 std::vector<EVT> ResTys;
2154 ResTys.push_back(ResTy);
2155 if (isUpdating)
2156 ResTys.push_back(MVT::i32);
2157 ResTys.push_back(MVT::Other);
2158
2159 SDValue Pred = getAL(CurDAG, dl);
2160 SDValue Reg0 = CurDAG->getRegister(0, MVT::i32);
2161 SDNode *VLd;
2162 SmallVector<SDValue, 7> Ops;
2163
2164 // Double registers and VLD1/VLD2 quad registers are directly supported.
2165 if (is64BitVector || NumVecs <= 2) {
2166 unsigned Opc = (is64BitVector ? DOpcodes[OpcodeIndex] :
2167 QOpcodes0[OpcodeIndex]);
2168 Ops.push_back(MemAddr);
2169 Ops.push_back(Align);
2170 if (isUpdating) {
2171 SDValue Inc = N->getOperand(AddrOpIdx + 1);
2172 bool IsImmUpdate = isPerfectIncrement(Inc, VT, NumVecs);
2173 if (!IsImmUpdate) {
2174 // We use a VLD1 for v1i64 even if the pseudo says vld2/3/4, so
2175 // check for the opcode rather than the number of vector elements.
2176 if (isVLDfixed(Opc))
2177 Opc = getVLDSTRegisterUpdateOpcode(Opc);
2178 Ops.push_back(Inc);
2179 // VLD1/VLD2 fixed increment does not need Reg0 so only include it in
2180 // the operands if not such an opcode.
2181 } else if (!isVLDfixed(Opc))
2182 Ops.push_back(Reg0);
2183 }
2184 Ops.push_back(Pred);
2185 Ops.push_back(Reg0);
2186 Ops.push_back(Chain);
2187 VLd = CurDAG->getMachineNode(Opc, dl, ResTys, Ops);
2188
2189 } else {
2190 // Otherwise, quad registers are loaded with two separate instructions,
2191 // where one loads the even registers and the other loads the odd registers.
2192 EVT AddrTy = MemAddr.getValueType();
2193
2194 // Load the even subregs. This is always an updating load, so that it
2195 // provides the address to the second load for the odd subregs.
2196 SDValue ImplDef =
2197 SDValue(CurDAG->getMachineNode(TargetOpcode::IMPLICIT_DEF, dl, ResTy), 0);
2198 const SDValue OpsA[] = { MemAddr, Align, Reg0, ImplDef, Pred, Reg0, Chain };
2199 SDNode *VLdA = CurDAG->getMachineNode(QOpcodes0[OpcodeIndex], dl,
2200 ResTy, AddrTy, MVT::Other, OpsA);
2201 Chain = SDValue(VLdA, 2);
2202
2203 // Load the odd subregs.
2204 Ops.push_back(SDValue(VLdA, 1));
2205 Ops.push_back(Align);
2206 if (isUpdating) {
2207 SDValue Inc = N->getOperand(AddrOpIdx + 1);
2208 assert(isa<ConstantSDNode>(Inc.getNode()) &&(static_cast <bool> (isa<ConstantSDNode>(Inc.getNode
()) && "only constant post-increment update allowed for VLD3/4"
) ? void (0) : __assert_fail ("isa<ConstantSDNode>(Inc.getNode()) && \"only constant post-increment update allowed for VLD3/4\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2209, __extension__
__PRETTY_FUNCTION__))
2209 "only constant post-increment update allowed for VLD3/4")(static_cast <bool> (isa<ConstantSDNode>(Inc.getNode
()) && "only constant post-increment update allowed for VLD3/4"
) ? void (0) : __assert_fail ("isa<ConstantSDNode>(Inc.getNode()) && \"only constant post-increment update allowed for VLD3/4\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2209, __extension__
__PRETTY_FUNCTION__));
2210 (void)Inc;
2211 Ops.push_back(Reg0);
2212 }
2213 Ops.push_back(SDValue(VLdA, 0));
2214 Ops.push_back(Pred);
2215 Ops.push_back(Reg0);
2216 Ops.push_back(Chain);
2217 VLd = CurDAG->getMachineNode(QOpcodes1[OpcodeIndex], dl, ResTys, Ops);
2218 }
2219
2220 // Transfer memoperands.
2221 MachineMemOperand *MemOp = cast<MemIntrinsicSDNode>(N)->getMemOperand();
2222 CurDAG->setNodeMemRefs(cast<MachineSDNode>(VLd), {MemOp});
2223
2224 if (NumVecs == 1) {
2225 ReplaceNode(N, VLd);
2226 return;
2227 }
2228
2229 // Extract out the subregisters.
2230 SDValue SuperReg = SDValue(VLd, 0);
2231 static_assert(ARM::dsub_7 == ARM::dsub_0 + 7 &&
2232 ARM::qsub_3 == ARM::qsub_0 + 3,
2233 "Unexpected subreg numbering");
2234 unsigned Sub0 = (is64BitVector ? ARM::dsub_0 : ARM::qsub_0);
2235 for (unsigned Vec = 0; Vec < NumVecs; ++Vec)
2236 ReplaceUses(SDValue(N, Vec),
2237 CurDAG->getTargetExtractSubreg(Sub0 + Vec, dl, VT, SuperReg));
2238 ReplaceUses(SDValue(N, NumVecs), SDValue(VLd, 1));
2239 if (isUpdating)
2240 ReplaceUses(SDValue(N, NumVecs + 1), SDValue(VLd, 2));
2241 CurDAG->RemoveDeadNode(N);
2242}
2243
2244void ARMDAGToDAGISel::SelectVST(SDNode *N, bool isUpdating, unsigned NumVecs,
2245 const uint16_t *DOpcodes,
2246 const uint16_t *QOpcodes0,
2247 const uint16_t *QOpcodes1) {
2248 assert(Subtarget->hasNEON())(static_cast <bool> (Subtarget->hasNEON()) ? void (0
) : __assert_fail ("Subtarget->hasNEON()", "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp"
, 2248, __extension__ __PRETTY_FUNCTION__));
2249 assert(NumVecs >= 1 && NumVecs <= 4 && "VST NumVecs out-of-range")(static_cast <bool> (NumVecs >= 1 && NumVecs
<= 4 && "VST NumVecs out-of-range") ? void (0) : __assert_fail
("NumVecs >= 1 && NumVecs <= 4 && \"VST NumVecs out-of-range\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2249, __extension__
__PRETTY_FUNCTION__));
2250 SDLoc dl(N);
2251
2252 SDValue MemAddr, Align;
2253 bool IsIntrinsic = !isUpdating; // By coincidence, all supported updating
2254 // nodes are not intrinsics.
2255 unsigned AddrOpIdx = IsIntrinsic ? 2 : 1;
2256 unsigned Vec0Idx = 3; // AddrOpIdx + (isUpdating ? 2 : 1)
2257 if (!SelectAddrMode6(N, N->getOperand(AddrOpIdx), MemAddr, Align))
2258 return;
2259
2260 MachineMemOperand *MemOp = cast<MemIntrinsicSDNode>(N)->getMemOperand();
2261
2262 SDValue Chain = N->getOperand(0);
2263 EVT VT = N->getOperand(Vec0Idx).getValueType();
2264 bool is64BitVector = VT.is64BitVector();
2265 Align = GetVLDSTAlign(Align, dl, NumVecs, is64BitVector);
2266
2267 unsigned OpcodeIndex;
2268 switch (VT.getSimpleVT().SimpleTy) {
2269 default: llvm_unreachable("unhandled vst type")::llvm::llvm_unreachable_internal("unhandled vst type", "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp"
, 2269);
2270 // Double-register operations:
2271 case MVT::v8i8: OpcodeIndex = 0; break;
2272 case MVT::v4f16:
2273 case MVT::v4bf16:
2274 case MVT::v4i16: OpcodeIndex = 1; break;
2275 case MVT::v2f32:
2276 case MVT::v2i32: OpcodeIndex = 2; break;
2277 case MVT::v1i64: OpcodeIndex = 3; break;
2278 // Quad-register operations:
2279 case MVT::v16i8: OpcodeIndex = 0; break;
2280 case MVT::v8f16:
2281 case MVT::v8bf16:
2282 case MVT::v8i16: OpcodeIndex = 1; break;
2283 case MVT::v4f32:
2284 case MVT::v4i32: OpcodeIndex = 2; break;
2285 case MVT::v2f64:
2286 case MVT::v2i64: OpcodeIndex = 3; break;
2287 }
2288
2289 std::vector<EVT> ResTys;
2290 if (isUpdating)
2291 ResTys.push_back(MVT::i32);
2292 ResTys.push_back(MVT::Other);
2293
2294 SDValue Pred = getAL(CurDAG, dl);
2295 SDValue Reg0 = CurDAG->getRegister(0, MVT::i32);
2296 SmallVector<SDValue, 7> Ops;
2297
2298 // Double registers and VST1/VST2 quad registers are directly supported.
2299 if (is64BitVector || NumVecs <= 2) {
2300 SDValue SrcReg;
2301 if (NumVecs == 1) {
2302 SrcReg = N->getOperand(Vec0Idx);
2303 } else if (is64BitVector) {
2304 // Form a REG_SEQUENCE to force register allocation.
2305 SDValue V0 = N->getOperand(Vec0Idx + 0);
2306 SDValue V1 = N->getOperand(Vec0Idx + 1);
2307 if (NumVecs == 2)
2308 SrcReg = SDValue(createDRegPairNode(MVT::v2i64, V0, V1), 0);
2309 else {
2310 SDValue V2 = N->getOperand(Vec0Idx + 2);
2311 // If it's a vst3, form a quad D-register and leave the last part as
2312 // an undef.
2313 SDValue V3 = (NumVecs == 3)
2314 ? SDValue(CurDAG->getMachineNode(TargetOpcode::IMPLICIT_DEF,dl,VT), 0)
2315 : N->getOperand(Vec0Idx + 3);
2316 SrcReg = SDValue(createQuadDRegsNode(MVT::v4i64, V0, V1, V2, V3), 0);
2317 }
2318 } else {
2319 // Form a QQ register.
2320 SDValue Q0 = N->getOperand(Vec0Idx);
2321 SDValue Q1 = N->getOperand(Vec0Idx + 1);
2322 SrcReg = SDValue(createQRegPairNode(MVT::v4i64, Q0, Q1), 0);
2323 }
2324
2325 unsigned Opc = (is64BitVector ? DOpcodes[OpcodeIndex] :
2326 QOpcodes0[OpcodeIndex]);
2327 Ops.push_back(MemAddr);
2328 Ops.push_back(Align);
2329 if (isUpdating) {
2330 SDValue Inc = N->getOperand(AddrOpIdx + 1);
2331 bool IsImmUpdate = isPerfectIncrement(Inc, VT, NumVecs);
2332 if (!IsImmUpdate) {
2333 // We use a VST1 for v1i64 even if the pseudo says VST2/3/4, so
2334 // check for the opcode rather than the number of vector elements.
2335 if (isVSTfixed(Opc))
2336 Opc = getVLDSTRegisterUpdateOpcode(Opc);
2337 Ops.push_back(Inc);
2338 }
2339 // VST1/VST2 fixed increment does not need Reg0 so only include it in
2340 // the operands if not such an opcode.
2341 else if (!isVSTfixed(Opc))
2342 Ops.push_back(Reg0);
2343 }
2344 Ops.push_back(SrcReg);
2345 Ops.push_back(Pred);
2346 Ops.push_back(Reg0);
2347 Ops.push_back(Chain);
2348 SDNode *VSt = CurDAG->getMachineNode(Opc, dl, ResTys, Ops);
2349
2350 // Transfer memoperands.
2351 CurDAG->setNodeMemRefs(cast<MachineSDNode>(VSt), {MemOp});
2352
2353 ReplaceNode(N, VSt);
2354 return;
2355 }
2356
2357 // Otherwise, quad registers are stored with two separate instructions,
2358 // where one stores the even registers and the other stores the odd registers.
2359
2360 // Form the QQQQ REG_SEQUENCE.
2361 SDValue V0 = N->getOperand(Vec0Idx + 0);
2362 SDValue V1 = N->getOperand(Vec0Idx + 1);
2363 SDValue V2 = N->getOperand(Vec0Idx + 2);
2364 SDValue V3 = (NumVecs == 3)
2365 ? SDValue(CurDAG->getMachineNode(TargetOpcode::IMPLICIT_DEF, dl, VT), 0)
2366 : N->getOperand(Vec0Idx + 3);
2367 SDValue RegSeq = SDValue(createQuadQRegsNode(MVT::v8i64, V0, V1, V2, V3), 0);
2368
2369 // Store the even D registers. This is always an updating store, so that it
2370 // provides the address to the second store for the odd subregs.
2371 const SDValue OpsA[] = { MemAddr, Align, Reg0, RegSeq, Pred, Reg0, Chain };
2372 SDNode *VStA = CurDAG->getMachineNode(QOpcodes0[OpcodeIndex], dl,
2373 MemAddr.getValueType(),
2374 MVT::Other, OpsA);
2375 CurDAG->setNodeMemRefs(cast<MachineSDNode>(VStA), {MemOp});
2376 Chain = SDValue(VStA, 1);
2377
2378 // Store the odd D registers.
2379 Ops.push_back(SDValue(VStA, 0));
2380 Ops.push_back(Align);
2381 if (isUpdating) {
2382 SDValue Inc = N->getOperand(AddrOpIdx + 1);
2383 assert(isa<ConstantSDNode>(Inc.getNode()) &&(static_cast <bool> (isa<ConstantSDNode>(Inc.getNode
()) && "only constant post-increment update allowed for VST3/4"
) ? void (0) : __assert_fail ("isa<ConstantSDNode>(Inc.getNode()) && \"only constant post-increment update allowed for VST3/4\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2384, __extension__
__PRETTY_FUNCTION__))
2384 "only constant post-increment update allowed for VST3/4")(static_cast <bool> (isa<ConstantSDNode>(Inc.getNode
()) && "only constant post-increment update allowed for VST3/4"
) ? void (0) : __assert_fail ("isa<ConstantSDNode>(Inc.getNode()) && \"only constant post-increment update allowed for VST3/4\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2384, __extension__
__PRETTY_FUNCTION__));
2385 (void)Inc;
2386 Ops.push_back(Reg0);
2387 }
2388 Ops.push_back(RegSeq);
2389 Ops.push_back(Pred);
2390 Ops.push_back(Reg0);
2391 Ops.push_back(Chain);
2392 SDNode *VStB = CurDAG->getMachineNode(QOpcodes1[OpcodeIndex], dl, ResTys,
2393 Ops);
2394 CurDAG->setNodeMemRefs(cast<MachineSDNode>(VStB), {MemOp});
2395 ReplaceNode(N, VStB);
2396}
2397
2398void ARMDAGToDAGISel::SelectVLDSTLane(SDNode *N, bool IsLoad, bool isUpdating,
2399 unsigned NumVecs,
2400 const uint16_t *DOpcodes,
2401 const uint16_t *QOpcodes) {
2402 assert(Subtarget->hasNEON())(static_cast <bool> (Subtarget->hasNEON()) ? void (0
) : __assert_fail ("Subtarget->hasNEON()", "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp"
, 2402, __extension__ __PRETTY_FUNCTION__));
2403 assert(NumVecs >=2 && NumVecs <= 4 && "VLDSTLane NumVecs out-of-range")(static_cast <bool> (NumVecs >=2 && NumVecs <=
4 && "VLDSTLane NumVecs out-of-range") ? void (0) : __assert_fail
("NumVecs >=2 && NumVecs <= 4 && \"VLDSTLane NumVecs out-of-range\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2403, __extension__
__PRETTY_FUNCTION__));
2404 SDLoc dl(N);
2405
2406 SDValue MemAddr, Align;
2407 bool IsIntrinsic = !isUpdating; // By coincidence, all supported updating
2408 // nodes are not intrinsics.
2409 unsigned AddrOpIdx = IsIntrinsic ? 2 : 1;
2410 unsigned Vec0Idx = 3; // AddrOpIdx + (isUpdating ? 2 : 1)
2411 if (!SelectAddrMode6(N, N->getOperand(AddrOpIdx), MemAddr, Align))
2412 return;
2413
2414 MachineMemOperand *MemOp = cast<MemIntrinsicSDNode>(N)->getMemOperand();
2415
2416 SDValue Chain = N->getOperand(0);
2417 unsigned Lane =
2418 cast<ConstantSDNode>(N->getOperand(Vec0Idx + NumVecs))->getZExtValue();
2419 EVT VT = N->getOperand(Vec0Idx).getValueType();
2420 bool is64BitVector = VT.is64BitVector();
2421
2422 unsigned Alignment = 0;
2423 if (NumVecs != 3) {
2424 Alignment = cast<ConstantSDNode>(Align)->getZExtValue();
2425 unsigned NumBytes = NumVecs * VT.getScalarSizeInBits() / 8;
2426 if (Alignment > NumBytes)
2427 Alignment = NumBytes;
2428 if (Alignment < 8 && Alignment < NumBytes)
2429 Alignment = 0;
2430 // Alignment must be a power of two; make sure of that.
2431 Alignment = (Alignment & -Alignment);
2432 if (Alignment == 1)
2433 Alignment = 0;
2434 }
2435 Align = CurDAG->getTargetConstant(Alignment, dl, MVT::i32);
2436
2437 unsigned OpcodeIndex;
2438 switch (VT.getSimpleVT().SimpleTy) {
2439 default: llvm_unreachable("unhandled vld/vst lane type")::llvm::llvm_unreachable_internal("unhandled vld/vst lane type"
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2439);
2440 // Double-register operations:
2441 case MVT::v8i8: OpcodeIndex = 0; break;
2442 case MVT::v4f16:
2443 case MVT::v4bf16:
2444 case MVT::v4i16: OpcodeIndex = 1; break;
2445 case MVT::v2f32:
2446 case MVT::v2i32: OpcodeIndex = 2; break;
2447 // Quad-register operations:
2448 case MVT::v8f16:
2449 case MVT::v8bf16:
2450 case MVT::v8i16: OpcodeIndex = 0; break;
2451 case MVT::v4f32:
2452 case MVT::v4i32: OpcodeIndex = 1; break;
2453 }
2454
2455 std::vector<EVT> ResTys;
2456 if (IsLoad) {
2457 unsigned ResTyElts = (NumVecs == 3) ? 4 : NumVecs;
2458 if (!is64BitVector)
2459 ResTyElts *= 2;
2460 ResTys.push_back(EVT::getVectorVT(*CurDAG->getContext(),
2461 MVT::i64, ResTyElts));
2462 }
2463 if (isUpdating)
2464 ResTys.push_back(MVT::i32);
2465 ResTys.push_back(MVT::Other);
2466
2467 SDValue Pred = getAL(CurDAG, dl);
2468 SDValue Reg0 = CurDAG->getRegister(0, MVT::i32);
2469
2470 SmallVector<SDValue, 8> Ops;
2471 Ops.push_back(MemAddr);
2472 Ops.push_back(Align);
2473 if (isUpdating) {
2474 SDValue Inc = N->getOperand(AddrOpIdx + 1);
2475 bool IsImmUpdate =
2476 isPerfectIncrement(Inc, VT.getVectorElementType(), NumVecs);
2477 Ops.push_back(IsImmUpdate ? Reg0 : Inc);
2478 }
2479
2480 SDValue SuperReg;
2481 SDValue V0 = N->getOperand(Vec0Idx + 0);
2482 SDValue V1 = N->getOperand(Vec0Idx + 1);
2483 if (NumVecs == 2) {
2484 if (is64BitVector)
2485 SuperReg = SDValue(createDRegPairNode(MVT::v2i64, V0, V1), 0);
2486 else
2487 SuperReg = SDValue(createQRegPairNode(MVT::v4i64, V0, V1), 0);
2488 } else {
2489 SDValue V2 = N->getOperand(Vec0Idx + 2);
2490 SDValue V3 = (NumVecs == 3)
2491 ? SDValue(CurDAG->getMachineNode(TargetOpcode::IMPLICIT_DEF, dl, VT), 0)
2492 : N->getOperand(Vec0Idx + 3);
2493 if (is64BitVector)
2494 SuperReg = SDValue(createQuadDRegsNode(MVT::v4i64, V0, V1, V2, V3), 0);
2495 else
2496 SuperReg = SDValue(createQuadQRegsNode(MVT::v8i64, V0, V1, V2, V3), 0);
2497 }
2498 Ops.push_back(SuperReg);
2499 Ops.push_back(getI32Imm(Lane, dl));
2500 Ops.push_back(Pred);
2501 Ops.push_back(Reg0);
2502 Ops.push_back(Chain);
2503
2504 unsigned Opc = (is64BitVector ? DOpcodes[OpcodeIndex] :
2505 QOpcodes[OpcodeIndex]);
2506 SDNode *VLdLn = CurDAG->getMachineNode(Opc, dl, ResTys, Ops);
2507 CurDAG->setNodeMemRefs(cast<MachineSDNode>(VLdLn), {MemOp});
2508 if (!IsLoad) {
2509 ReplaceNode(N, VLdLn);
2510 return;
2511 }
2512
2513 // Extract the subregisters.
2514 SuperReg = SDValue(VLdLn, 0);
2515 static_assert(ARM::dsub_7 == ARM::dsub_0 + 7 &&
2516 ARM::qsub_3 == ARM::qsub_0 + 3,
2517 "Unexpected subreg numbering");
2518 unsigned Sub0 = is64BitVector ? ARM::dsub_0 : ARM::qsub_0;
2519 for (unsigned Vec = 0; Vec < NumVecs; ++Vec)
2520 ReplaceUses(SDValue(N, Vec),
2521 CurDAG->getTargetExtractSubreg(Sub0 + Vec, dl, VT, SuperReg));
2522 ReplaceUses(SDValue(N, NumVecs), SDValue(VLdLn, 1));
2523 if (isUpdating)
2524 ReplaceUses(SDValue(N, NumVecs + 1), SDValue(VLdLn, 2));
2525 CurDAG->RemoveDeadNode(N);
2526}
2527
2528template <typename SDValueVector>
2529void ARMDAGToDAGISel::AddMVEPredicateToOps(SDValueVector &Ops, SDLoc Loc,
2530 SDValue PredicateMask) {
2531 Ops.push_back(CurDAG->getTargetConstant(ARMVCC::Then, Loc, MVT::i32));
2532 Ops.push_back(PredicateMask);
2533 Ops.push_back(CurDAG->getRegister(0, MVT::i32)); // tp_reg
2534}
2535
2536template <typename SDValueVector>
2537void ARMDAGToDAGISel::AddMVEPredicateToOps(SDValueVector &Ops, SDLoc Loc,
2538 SDValue PredicateMask,
2539 SDValue Inactive) {
2540 Ops.push_back(CurDAG->getTargetConstant(ARMVCC::Then, Loc, MVT::i32));
2541 Ops.push_back(PredicateMask);
2542 Ops.push_back(CurDAG->getRegister(0, MVT::i32)); // tp_reg
2543 Ops.push_back(Inactive);
2544}
2545
2546template <typename SDValueVector>
2547void ARMDAGToDAGISel::AddEmptyMVEPredicateToOps(SDValueVector &Ops, SDLoc Loc) {
2548 Ops.push_back(CurDAG->getTargetConstant(ARMVCC::None, Loc, MVT::i32));
2549 Ops.push_back(CurDAG->getRegister(0, MVT::i32));
2550 Ops.push_back(CurDAG->getRegister(0, MVT::i32)); // tp_reg
2551}
2552
2553template <typename SDValueVector>
2554void ARMDAGToDAGISel::AddEmptyMVEPredicateToOps(SDValueVector &Ops, SDLoc Loc,
2555 EVT InactiveTy) {
2556 Ops.push_back(CurDAG->getTargetConstant(ARMVCC::None, Loc, MVT::i32));
2557 Ops.push_back(CurDAG->getRegister(0, MVT::i32));
2558 Ops.push_back(CurDAG->getRegister(0, MVT::i32)); // tp_reg
2559 Ops.push_back(SDValue(
2560 CurDAG->getMachineNode(TargetOpcode::IMPLICIT_DEF, Loc, InactiveTy), 0));
2561}
2562
2563void ARMDAGToDAGISel::SelectMVE_WB(SDNode *N, const uint16_t *Opcodes,
2564 bool Predicated) {
2565 SDLoc Loc(N);
2566 SmallVector<SDValue, 8> Ops;
2567
2568 uint16_t Opcode;
2569 switch (N->getValueType(1).getVectorElementType().getSizeInBits()) {
2570 case 32:
2571 Opcode = Opcodes[0];
2572 break;
2573 case 64:
2574 Opcode = Opcodes[1];
2575 break;
2576 default:
2577 llvm_unreachable("bad vector element size in SelectMVE_WB")::llvm::llvm_unreachable_internal("bad vector element size in SelectMVE_WB"
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2577);
2578 }
2579
2580 Ops.push_back(N->getOperand(2)); // vector of base addresses
2581
2582 int32_t ImmValue = cast<ConstantSDNode>(N->getOperand(3))->getZExtValue();
2583 Ops.push_back(getI32Imm(ImmValue, Loc)); // immediate offset
2584
2585 if (Predicated)
2586 AddMVEPredicateToOps(Ops, Loc, N->getOperand(4));
2587 else
2588 AddEmptyMVEPredicateToOps(Ops, Loc);
2589
2590 Ops.push_back(N->getOperand(0)); // chain
2591
2592 SmallVector<EVT, 8> VTs;
2593 VTs.push_back(N->getValueType(1));
2594 VTs.push_back(N->getValueType(0));
2595 VTs.push_back(N->getValueType(2));
2596
2597 SDNode *New = CurDAG->getMachineNode(Opcode, SDLoc(N), VTs, Ops);
2598 ReplaceUses(SDValue(N, 0), SDValue(New, 1));
2599 ReplaceUses(SDValue(N, 1), SDValue(New, 0));
2600 ReplaceUses(SDValue(N, 2), SDValue(New, 2));
2601 transferMemOperands(N, New);
2602 CurDAG->RemoveDeadNode(N);
2603}
2604
2605void ARMDAGToDAGISel::SelectMVE_LongShift(SDNode *N, uint16_t Opcode,
2606 bool Immediate,
2607 bool HasSaturationOperand) {
2608 SDLoc Loc(N);
2609 SmallVector<SDValue, 8> Ops;
2610
2611 // Two 32-bit halves of the value to be shifted
2612 Ops.push_back(N->getOperand(1));
2613 Ops.push_back(N->getOperand(2));
2614
2615 // The shift count
2616 if (Immediate) {
2617 int32_t ImmValue = cast<ConstantSDNode>(N->getOperand(3))->getZExtValue();
2618 Ops.push_back(getI32Imm(ImmValue, Loc)); // immediate shift count
2619 } else {
2620 Ops.push_back(N->getOperand(3));
2621 }
2622
2623 // The immediate saturation operand, if any
2624 if (HasSaturationOperand) {
2625 int32_t SatOp = cast<ConstantSDNode>(N->getOperand(4))->getZExtValue();
2626 int SatBit = (SatOp == 64 ? 0 : 1);
2627 Ops.push_back(getI32Imm(SatBit, Loc));
2628 }
2629
2630 // MVE scalar shifts are IT-predicable, so include the standard
2631 // predicate arguments.
2632 Ops.push_back(getAL(CurDAG, Loc));
2633 Ops.push_back(CurDAG->getRegister(0, MVT::i32));
2634
2635 CurDAG->SelectNodeTo(N, Opcode, N->getVTList(), makeArrayRef(Ops));
2636}
2637
2638void ARMDAGToDAGISel::SelectMVE_VADCSBC(SDNode *N, uint16_t OpcodeWithCarry,
2639 uint16_t OpcodeWithNoCarry,
2640 bool Add, bool Predicated) {
2641 SDLoc Loc(N);
2642 SmallVector<SDValue, 8> Ops;
2643 uint16_t Opcode;
2644
2645 unsigned FirstInputOp = Predicated ? 2 : 1;
2646
2647 // Two input vectors and the input carry flag
2648 Ops.push_back(N->getOperand(FirstInputOp));
2649 Ops.push_back(N->getOperand(FirstInputOp + 1));
2650 SDValue CarryIn = N->getOperand(FirstInputOp + 2);
2651 ConstantSDNode *CarryInConstant = dyn_cast<ConstantSDNode>(CarryIn);
2652 uint32_t CarryMask = 1 << 29;
2653 uint32_t CarryExpected = Add ? 0 : CarryMask;
2654 if (CarryInConstant &&
2655 (CarryInConstant->getZExtValue() & CarryMask) == CarryExpected) {
2656 Opcode = OpcodeWithNoCarry;
2657 } else {
2658 Ops.push_back(CarryIn);
2659 Opcode = OpcodeWithCarry;
2660 }
2661
2662 if (Predicated)
2663 AddMVEPredicateToOps(Ops, Loc,
2664 N->getOperand(FirstInputOp + 3), // predicate
2665 N->getOperand(FirstInputOp - 1)); // inactive
2666 else
2667 AddEmptyMVEPredicateToOps(Ops, Loc, N->getValueType(0));
2668
2669 CurDAG->SelectNodeTo(N, Opcode, N->getVTList(), makeArrayRef(Ops));
2670}
2671
2672void ARMDAGToDAGISel::SelectMVE_VSHLC(SDNode *N, bool Predicated) {
2673 SDLoc Loc(N);
2674 SmallVector<SDValue, 8> Ops;
2675
2676 // One vector input, followed by a 32-bit word of bits to shift in
2677 // and then an immediate shift count
2678 Ops.push_back(N->getOperand(1));
2679 Ops.push_back(N->getOperand(2));
2680 int32_t ImmValue = cast<ConstantSDNode>(N->getOperand(3))->getZExtValue();
2681 Ops.push_back(getI32Imm(ImmValue, Loc)); // immediate shift count
2682
2683 if (Predicated)
2684 AddMVEPredicateToOps(Ops, Loc, N->getOperand(4));
2685 else
2686 AddEmptyMVEPredicateToOps(Ops, Loc);
2687
2688 CurDAG->SelectNodeTo(N, ARM::MVE_VSHLC, N->getVTList(), makeArrayRef(Ops));
2689}
2690
2691static bool SDValueToConstBool(SDValue SDVal) {
2692 assert(isa<ConstantSDNode>(SDVal) && "expected a compile-time constant")(static_cast <bool> (isa<ConstantSDNode>(SDVal) &&
"expected a compile-time constant") ? void (0) : __assert_fail
("isa<ConstantSDNode>(SDVal) && \"expected a compile-time constant\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2692, __extension__
__PRETTY_FUNCTION__));
2693 ConstantSDNode *SDValConstant = dyn_cast<ConstantSDNode>(SDVal);
2694 uint64_t Value = SDValConstant->getZExtValue();
2695 assert((Value == 0 || Value == 1) && "expected value 0 or 1")(static_cast <bool> ((Value == 0 || Value == 1) &&
"expected value 0 or 1") ? void (0) : __assert_fail ("(Value == 0 || Value == 1) && \"expected value 0 or 1\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2695, __extension__
__PRETTY_FUNCTION__));
2696 return Value;
2697}
2698
2699void ARMDAGToDAGISel::SelectBaseMVE_VMLLDAV(SDNode *N, bool Predicated,
2700 const uint16_t *OpcodesS,
2701 const uint16_t *OpcodesU,
2702 size_t Stride, size_t TySize) {
2703 assert(TySize < Stride && "Invalid TySize")(static_cast <bool> (TySize < Stride && "Invalid TySize"
) ? void (0) : __assert_fail ("TySize < Stride && \"Invalid TySize\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2703, __extension__
__PRETTY_FUNCTION__));
2704 bool IsUnsigned = SDValueToConstBool(N->getOperand(1));
2705 bool IsSub = SDValueToConstBool(N->getOperand(2));
2706 bool IsExchange = SDValueToConstBool(N->getOperand(3));
2707 if (IsUnsigned) {
2708 assert(!IsSub &&(static_cast <bool> (!IsSub && "Unsigned versions of vmlsldav[a]/vrmlsldavh[a] do not exist"
) ? void (0) : __assert_fail ("!IsSub && \"Unsigned versions of vmlsldav[a]/vrmlsldavh[a] do not exist\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2709, __extension__
__PRETTY_FUNCTION__))
2709 "Unsigned versions of vmlsldav[a]/vrmlsldavh[a] do not exist")(static_cast <bool> (!IsSub && "Unsigned versions of vmlsldav[a]/vrmlsldavh[a] do not exist"
) ? void (0) : __assert_fail ("!IsSub && \"Unsigned versions of vmlsldav[a]/vrmlsldavh[a] do not exist\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2709, __extension__
__PRETTY_FUNCTION__));
2710 assert(!IsExchange &&(static_cast <bool> (!IsExchange && "Unsigned versions of vmlaldav[a]x/vrmlaldavh[a]x do not exist"
) ? void (0) : __assert_fail ("!IsExchange && \"Unsigned versions of vmlaldav[a]x/vrmlaldavh[a]x do not exist\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2711, __extension__
__PRETTY_FUNCTION__))
2711 "Unsigned versions of vmlaldav[a]x/vrmlaldavh[a]x do not exist")(static_cast <bool> (!IsExchange && "Unsigned versions of vmlaldav[a]x/vrmlaldavh[a]x do not exist"
) ? void (0) : __assert_fail ("!IsExchange && \"Unsigned versions of vmlaldav[a]x/vrmlaldavh[a]x do not exist\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2711, __extension__
__PRETTY_FUNCTION__));
2712 }
2713
2714 auto OpIsZero = [N](size_t OpNo) {
2715 if (ConstantSDNode *OpConst = dyn_cast<ConstantSDNode>(N->getOperand(OpNo)))
2716 if (OpConst->getZExtValue() == 0)
2717 return true;
2718 return false;
2719 };
2720
2721 // If the input accumulator value is not zero, select an instruction with
2722 // accumulator, otherwise select an instruction without accumulator
2723 bool IsAccum = !(OpIsZero(4) && OpIsZero(5));
2724
2725 const uint16_t *Opcodes = IsUnsigned ? OpcodesU : OpcodesS;
2726 if (IsSub)
2727 Opcodes += 4 * Stride;
2728 if (IsExchange)
2729 Opcodes += 2 * Stride;
2730 if (IsAccum)
2731 Opcodes += Stride;
2732 uint16_t Opcode = Opcodes[TySize];
2733
2734 SDLoc Loc(N);
2735 SmallVector<SDValue, 8> Ops;
2736 // Push the accumulator operands, if they are used
2737 if (IsAccum) {
2738 Ops.push_back(N->getOperand(4));
2739 Ops.push_back(N->getOperand(5));
2740 }
2741 // Push the two vector operands
2742 Ops.push_back(N->getOperand(6));
2743 Ops.push_back(N->getOperand(7));
2744
2745 if (Predicated)
2746 AddMVEPredicateToOps(Ops, Loc, N->getOperand(8));
2747 else
2748 AddEmptyMVEPredicateToOps(Ops, Loc);
2749
2750 CurDAG->SelectNodeTo(N, Opcode, N->getVTList(), makeArrayRef(Ops));
2751}
2752
2753void ARMDAGToDAGISel::SelectMVE_VMLLDAV(SDNode *N, bool Predicated,
2754 const uint16_t *OpcodesS,
2755 const uint16_t *OpcodesU) {
2756 EVT VecTy = N->getOperand(6).getValueType();
2757 size_t SizeIndex;
2758 switch (VecTy.getVectorElementType().getSizeInBits()) {
2759 case 16:
2760 SizeIndex = 0;
2761 break;
2762 case 32:
2763 SizeIndex = 1;
2764 break;
2765 default:
2766 llvm_unreachable("bad vector element size")::llvm::llvm_unreachable_internal("bad vector element size", "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp"
, 2766);
2767 }
2768
2769 SelectBaseMVE_VMLLDAV(N, Predicated, OpcodesS, OpcodesU, 2, SizeIndex);
2770}
2771
2772void ARMDAGToDAGISel::SelectMVE_VRMLLDAVH(SDNode *N, bool Predicated,
2773 const uint16_t *OpcodesS,
2774 const uint16_t *OpcodesU) {
2775 assert((static_cast <bool> (N->getOperand(6).getValueType()
.getVectorElementType().getSizeInBits() == 32 && "bad vector element size"
) ? void (0) : __assert_fail ("N->getOperand(6).getValueType().getVectorElementType().getSizeInBits() == 32 && \"bad vector element size\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2778, __extension__
__PRETTY_FUNCTION__))
2776 N->getOperand(6).getValueType().getVectorElementType().getSizeInBits() ==(static_cast <bool> (N->getOperand(6).getValueType()
.getVectorElementType().getSizeInBits() == 32 && "bad vector element size"
) ? void (0) : __assert_fail ("N->getOperand(6).getValueType().getVectorElementType().getSizeInBits() == 32 && \"bad vector element size\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2778, __extension__
__PRETTY_FUNCTION__))
2777 32 &&(static_cast <bool> (N->getOperand(6).getValueType()
.getVectorElementType().getSizeInBits() == 32 && "bad vector element size"
) ? void (0) : __assert_fail ("N->getOperand(6).getValueType().getVectorElementType().getSizeInBits() == 32 && \"bad vector element size\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2778, __extension__
__PRETTY_FUNCTION__))
2778 "bad vector element size")(static_cast <bool> (N->getOperand(6).getValueType()
.getVectorElementType().getSizeInBits() == 32 && "bad vector element size"
) ? void (0) : __assert_fail ("N->getOperand(6).getValueType().getVectorElementType().getSizeInBits() == 32 && \"bad vector element size\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2778, __extension__
__PRETTY_FUNCTION__));
2779 SelectBaseMVE_VMLLDAV(N, Predicated, OpcodesS, OpcodesU, 1, 0);
2780}
2781
2782void ARMDAGToDAGISel::SelectMVE_VLD(SDNode *N, unsigned NumVecs,
2783 const uint16_t *const *Opcodes,
2784 bool HasWriteback) {
2785 EVT VT = N->getValueType(0);
2786 SDLoc Loc(N);
2787
2788 const uint16_t *OurOpcodes;
2789 switch (VT.getVectorElementType().getSizeInBits()) {
2790 case 8:
2791 OurOpcodes = Opcodes[0];
2792 break;
2793 case 16:
2794 OurOpcodes = Opcodes[1];
2795 break;
2796 case 32:
2797 OurOpcodes = Opcodes[2];
2798 break;
2799 default:
2800 llvm_unreachable("bad vector element size in SelectMVE_VLD")::llvm::llvm_unreachable_internal("bad vector element size in SelectMVE_VLD"
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2800);
2801 }
2802
2803 EVT DataTy = EVT::getVectorVT(*CurDAG->getContext(), MVT::i64, NumVecs * 2);
2804 SmallVector<EVT, 4> ResultTys = {DataTy, MVT::Other};
2805 unsigned PtrOperand = HasWriteback ? 1 : 2;
2806
2807 auto Data = SDValue(
2808 CurDAG->getMachineNode(TargetOpcode::IMPLICIT_DEF, Loc, DataTy), 0);
2809 SDValue Chain = N->getOperand(0);
2810 // Add a MVE_VLDn instruction for each Vec, except the last
2811 for (unsigned Stage = 0; Stage < NumVecs - 1; ++Stage) {
2812 SDValue Ops[] = {Data, N->getOperand(PtrOperand), Chain};
2813 auto LoadInst =
2814 CurDAG->getMachineNode(OurOpcodes[Stage], Loc, ResultTys, Ops);
2815 Data = SDValue(LoadInst, 0);
2816 Chain = SDValue(LoadInst, 1);
2817 transferMemOperands(N, LoadInst);
2818 }
2819 // The last may need a writeback on it
2820 if (HasWriteback)
2821 ResultTys = {DataTy, MVT::i32, MVT::Other};
2822 SDValue Ops[] = {Data, N->getOperand(PtrOperand), Chain};
2823 auto LoadInst =
2824 CurDAG->getMachineNode(OurOpcodes[NumVecs - 1], Loc, ResultTys, Ops);
2825 transferMemOperands(N, LoadInst);
2826
2827 unsigned i;
2828 for (i = 0; i < NumVecs; i++)
2829 ReplaceUses(SDValue(N, i),
2830 CurDAG->getTargetExtractSubreg(ARM::qsub_0 + i, Loc, VT,
2831 SDValue(LoadInst, 0)));
2832 if (HasWriteback)
2833 ReplaceUses(SDValue(N, i++), SDValue(LoadInst, 1));
2834 ReplaceUses(SDValue(N, i), SDValue(LoadInst, HasWriteback ? 2 : 1));
2835 CurDAG->RemoveDeadNode(N);
2836}
2837
2838void ARMDAGToDAGISel::SelectMVE_VxDUP(SDNode *N, const uint16_t *Opcodes,
2839 bool Wrapping, bool Predicated) {
2840 EVT VT = N->getValueType(0);
2841 SDLoc Loc(N);
2842
2843 uint16_t Opcode;
2844 switch (VT.getScalarSizeInBits()) {
2845 case 8:
2846 Opcode = Opcodes[0];
2847 break;
2848 case 16:
2849 Opcode = Opcodes[1];
2850 break;
2851 case 32:
2852 Opcode = Opcodes[2];
2853 break;
2854 default:
2855 llvm_unreachable("bad vector element size in SelectMVE_VxDUP")::llvm::llvm_unreachable_internal("bad vector element size in SelectMVE_VxDUP"
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2855);
2856 }
2857
2858 SmallVector<SDValue, 8> Ops;
2859 unsigned OpIdx = 1;
2860
2861 SDValue Inactive;
2862 if (Predicated)
2863 Inactive = N->getOperand(OpIdx++);
2864
2865 Ops.push_back(N->getOperand(OpIdx++)); // base
2866 if (Wrapping)
2867 Ops.push_back(N->getOperand(OpIdx++)); // limit
2868
2869 SDValue ImmOp = N->getOperand(OpIdx++); // step
2870 int ImmValue = cast<ConstantSDNode>(ImmOp)->getZExtValue();
2871 Ops.push_back(getI32Imm(ImmValue, Loc));
2872
2873 if (Predicated)
2874 AddMVEPredicateToOps(Ops, Loc, N->getOperand(OpIdx), Inactive);
2875 else
2876 AddEmptyMVEPredicateToOps(Ops, Loc, N->getValueType(0));
2877
2878 CurDAG->SelectNodeTo(N, Opcode, N->getVTList(), makeArrayRef(Ops));
2879}
2880
2881void ARMDAGToDAGISel::SelectCDE_CXxD(SDNode *N, uint16_t Opcode,
2882 size_t NumExtraOps, bool HasAccum) {
2883 bool IsBigEndian = CurDAG->getDataLayout().isBigEndian();
2884 SDLoc Loc(N);
2885 SmallVector<SDValue, 8> Ops;
2886
2887 unsigned OpIdx = 1;
2888
2889 // Convert and append the immediate operand designating the coprocessor.
2890 SDValue ImmCorpoc = N->getOperand(OpIdx++);
2891 uint32_t ImmCoprocVal = cast<ConstantSDNode>(ImmCorpoc)->getZExtValue();
2892 Ops.push_back(getI32Imm(ImmCoprocVal, Loc));
2893
2894 // For accumulating variants copy the low and high order parts of the
2895 // accumulator into a register pair and add it to the operand vector.
2896 if (HasAccum) {
2897 SDValue AccLo = N->getOperand(OpIdx++);
2898 SDValue AccHi = N->getOperand(OpIdx++);
2899 if (IsBigEndian)
2900 std::swap(AccLo, AccHi);
2901 Ops.push_back(SDValue(createGPRPairNode(MVT::Untyped, AccLo, AccHi), 0));
2902 }
2903
2904 // Copy extra operands as-is.
2905 for (size_t I = 0; I < NumExtraOps; I++)
2906 Ops.push_back(N->getOperand(OpIdx++));
2907
2908 // Convert and append the immediate operand
2909 SDValue Imm = N->getOperand(OpIdx);
2910 uint32_t ImmVal = cast<ConstantSDNode>(Imm)->getZExtValue();
2911 Ops.push_back(getI32Imm(ImmVal, Loc));
2912
2913 // Accumulating variants are IT-predicable, add predicate operands.
2914 if (HasAccum) {
2915 SDValue Pred = getAL(CurDAG, Loc);
2916 SDValue PredReg = CurDAG->getRegister(0, MVT::i32);
2917 Ops.push_back(Pred);
2918 Ops.push_back(PredReg);
2919 }
2920
2921 // Create the CDE intruction
2922 SDNode *InstrNode = CurDAG->getMachineNode(Opcode, Loc, MVT::Untyped, Ops);
2923 SDValue ResultPair = SDValue(InstrNode, 0);
2924
2925 // The original intrinsic had two outputs, and the output of the dual-register
2926 // CDE instruction is a register pair. We need to extract the two subregisters
2927 // and replace all uses of the original outputs with the extracted
2928 // subregisters.
2929 uint16_t SubRegs[2] = {ARM::gsub_0, ARM::gsub_1};
2930 if (IsBigEndian)
2931 std::swap(SubRegs[0], SubRegs[1]);
2932
2933 for (size_t ResIdx = 0; ResIdx < 2; ResIdx++) {
2934 if (SDValue(N, ResIdx).use_empty())
2935 continue;
2936 SDValue SubReg = CurDAG->getTargetExtractSubreg(SubRegs[ResIdx], Loc,
2937 MVT::i32, ResultPair);
2938 ReplaceUses(SDValue(N, ResIdx), SubReg);
2939 }
2940
2941 CurDAG->RemoveDeadNode(N);
2942}
2943
2944void ARMDAGToDAGISel::SelectVLDDup(SDNode *N, bool IsIntrinsic,
2945 bool isUpdating, unsigned NumVecs,
2946 const uint16_t *DOpcodes,
2947 const uint16_t *QOpcodes0,
2948 const uint16_t *QOpcodes1) {
2949 assert(Subtarget->hasNEON())(static_cast <bool> (Subtarget->hasNEON()) ? void (0
) : __assert_fail ("Subtarget->hasNEON()", "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp"
, 2949, __extension__ __PRETTY_FUNCTION__));
2950 assert(NumVecs >= 1 && NumVecs <= 4 && "VLDDup NumVecs out-of-range")(static_cast <bool> (NumVecs >= 1 && NumVecs
<= 4 && "VLDDup NumVecs out-of-range") ? void (0)
: __assert_fail ("NumVecs >= 1 && NumVecs <= 4 && \"VLDDup NumVecs out-of-range\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 2950, __extension__
__PRETTY_FUNCTION__));
2951 SDLoc dl(N);
2952
2953 SDValue MemAddr, Align;
2954 unsigned AddrOpIdx = IsIntrinsic ? 2 : 1;
2955 if (!SelectAddrMode6(N, N->getOperand(AddrOpIdx), MemAddr, Align))
2956 return;
2957
2958 SDValue Chain = N->getOperand(0);
2959 EVT VT = N->getValueType(0);
2960 bool is64BitVector = VT.is64BitVector();
2961
2962 unsigned Alignment = 0;
2963 if (NumVecs != 3) {
2964 Alignment = cast<ConstantSDNode>(Align)->getZExtValue();
2965 unsigned NumBytes = NumVecs * VT.getScalarSizeInBits() / 8;
2966 if (Alignment > NumBytes)
2967 Alignment = NumBytes;
2968 if (Alignment < 8 && Alignment < NumBytes)
2969 Alignment = 0;
2970 // Alignment must be a power of two; make sure of that.
2971 Alignment = (Alignment & -Alignment);
2972 if (Alignment == 1)
2973 Alignment = 0;
2974 }
2975 Align = CurDAG->getTargetConstant(Alignment, dl, MVT::i32);
2976
2977 unsigned OpcodeIndex;
2978 switch (VT.getSimpleVT().SimpleTy) {
2979 default: llvm_unreachable("unhandled vld-dup type")::llvm::llvm_unreachable_internal("unhandled vld-dup type", "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp"
, 2979);
2980 case MVT::v8i8:
2981 case MVT::v16i8: OpcodeIndex = 0; break;
2982 case MVT::v4i16:
2983 case MVT::v8i16:
2984 case MVT::v4f16:
2985 case MVT::v8f16:
2986 case MVT::v4bf16:
2987 case MVT::v8bf16:
2988 OpcodeIndex = 1; break;
2989 case MVT::v2f32:
2990 case MVT::v2i32:
2991 case MVT::v4f32:
2992 case MVT::v4i32: OpcodeIndex = 2; break;
2993 case MVT::v1f64:
2994 case MVT::v1i64: OpcodeIndex = 3; break;
2995 }
2996
2997 unsigned ResTyElts = (NumVecs == 3) ? 4 : NumVecs;
2998 if (!is64BitVector)
2999 ResTyElts *= 2;
3000 EVT ResTy = EVT::getVectorVT(*CurDAG->getContext(), MVT::i64, ResTyElts);
3001
3002 std::vector<EVT> ResTys;
3003 ResTys.push_back(ResTy);
3004 if (isUpdating)
3005 ResTys.push_back(MVT::i32);
3006 ResTys.push_back(MVT::Other);
3007
3008 SDValue Pred = getAL(CurDAG, dl);
3009 SDValue Reg0 = CurDAG->getRegister(0, MVT::i32);
3010
3011 SmallVector<SDValue, 6> Ops;
3012 Ops.push_back(MemAddr);
3013 Ops.push_back(Align);
3014 unsigned Opc = is64BitVector ? DOpcodes[OpcodeIndex]
3015 : (NumVecs == 1) ? QOpcodes0[OpcodeIndex]
3016 : QOpcodes1[OpcodeIndex];
3017 if (isUpdating) {
3018 SDValue Inc = N->getOperand(2);
3019 bool IsImmUpdate =
3020 isPerfectIncrement(Inc, VT.getVectorElementType(), NumVecs);
3021 if (IsImmUpdate) {
3022 if (!isVLDfixed(Opc))
3023 Ops.push_back(Reg0);
3024 } else {
3025 if (isVLDfixed(Opc))
3026 Opc = getVLDSTRegisterUpdateOpcode(Opc);
3027 Ops.push_back(Inc);
3028 }
3029 }
3030 if (is64BitVector || NumVecs == 1) {
3031 // Double registers and VLD1 quad registers are directly supported.
3032 } else if (NumVecs == 2) {
3033 const SDValue OpsA[] = {MemAddr, Align, Pred, Reg0, Chain};
3034 SDNode *VLdA = CurDAG->getMachineNode(QOpcodes0[OpcodeIndex], dl, ResTy,
3035 MVT::Other, OpsA);
3036 Chain = SDValue(VLdA, 1);
3037 } else {
3038 SDValue ImplDef = SDValue(
3039 CurDAG->getMachineNode(TargetOpcode::IMPLICIT_DEF, dl, ResTy), 0);
3040 const SDValue OpsA[] = {MemAddr, Align, ImplDef, Pred, Reg0, Chain};
3041 SDNode *VLdA = CurDAG->getMachineNode(QOpcodes0[OpcodeIndex], dl, ResTy,
3042 MVT::Other, OpsA);
3043 Ops.push_back(SDValue(VLdA, 0));
3044 Chain = SDValue(VLdA, 1);
3045 }
3046
3047 Ops.push_back(Pred);
3048 Ops.push_back(Reg0);
3049 Ops.push_back(Chain);
3050
3051 SDNode *VLdDup = CurDAG->getMachineNode(Opc, dl, ResTys, Ops);
3052
3053 // Transfer memoperands.
3054 MachineMemOperand *MemOp = cast<MemIntrinsicSDNode>(N)->getMemOperand();
3055 CurDAG->setNodeMemRefs(cast<MachineSDNode>(VLdDup), {MemOp});
3056
3057 // Extract the subregisters.
3058 if (NumVecs == 1) {
3059 ReplaceUses(SDValue(N, 0), SDValue(VLdDup, 0));
3060 } else {
3061 SDValue SuperReg = SDValue(VLdDup, 0);
3062 static_assert(ARM::dsub_7 == ARM::dsub_0 + 7, "Unexpected subreg numbering");
3063 unsigned SubIdx = is64BitVector ? ARM::dsub_0 : ARM::qsub_0;
3064 for (unsigned Vec = 0; Vec != NumVecs; ++Vec) {
3065 ReplaceUses(SDValue(N, Vec),
3066 CurDAG->getTargetExtractSubreg(SubIdx+Vec, dl, VT, SuperReg));
3067 }
3068 }
3069 ReplaceUses(SDValue(N, NumVecs), SDValue(VLdDup, 1));
3070 if (isUpdating)
3071 ReplaceUses(SDValue(N, NumVecs + 1), SDValue(VLdDup, 2));
3072 CurDAG->RemoveDeadNode(N);
3073}
3074
3075bool ARMDAGToDAGISel::tryInsertVectorElt(SDNode *N) {
3076 if (!Subtarget->hasMVEIntegerOps())
3077 return false;
3078
3079 SDLoc dl(N);
3080
3081 // We are trying to use VMOV/VMOVX/VINS to more efficiently lower insert and
3082 // extracts of v8f16 and v8i16 vectors. Check that we have two adjacent
3083 // inserts of the correct type:
3084 SDValue Ins1 = SDValue(N, 0);
3085 SDValue Ins2 = N->getOperand(0);
3086 EVT VT = Ins1.getValueType();
3087 if (Ins2.getOpcode() != ISD::INSERT_VECTOR_ELT || !Ins2.hasOneUse() ||
3088 !isa<ConstantSDNode>(Ins1.getOperand(2)) ||
3089 !isa<ConstantSDNode>(Ins2.getOperand(2)) ||
3090 (VT != MVT::v8f16 && VT != MVT::v8i16) || (Ins2.getValueType() != VT))
3091 return false;
3092
3093 unsigned Lane1 = Ins1.getConstantOperandVal(2);
3094 unsigned Lane2 = Ins2.getConstantOperandVal(2);
3095 if (Lane2 % 2 != 0 || Lane1 != Lane2 + 1)
3096 return false;
3097
3098 // If the inserted values will be able to use T/B already, leave it to the
3099 // existing tablegen patterns. For example VCVTT/VCVTB.
3100 SDValue Val1 = Ins1.getOperand(1);
3101 SDValue Val2 = Ins2.getOperand(1);
3102 if (Val1.getOpcode() == ISD::FP_ROUND || Val2.getOpcode() == ISD::FP_ROUND)
3103 return false;
3104
3105 // Check if the inserted values are both extracts.
3106 if ((Val1.getOpcode() == ISD::EXTRACT_VECTOR_ELT ||
3107 Val1.getOpcode() == ARMISD::VGETLANEu) &&
3108 (Val2.getOpcode() == ISD::EXTRACT_VECTOR_ELT ||
3109 Val2.getOpcode() == ARMISD::VGETLANEu) &&
3110 isa<ConstantSDNode>(Val1.getOperand(1)) &&
3111 isa<ConstantSDNode>(Val2.getOperand(1)) &&
3112 (Val1.getOperand(0).getValueType() == MVT::v8f16 ||
3113 Val1.getOperand(0).getValueType() == MVT::v8i16) &&
3114 (Val2.getOperand(0).getValueType() == MVT::v8f16 ||
3115 Val2.getOperand(0).getValueType() == MVT::v8i16)) {
3116 unsigned ExtractLane1 = Val1.getConstantOperandVal(1);
3117 unsigned ExtractLane2 = Val2.getConstantOperandVal(1);
3118
3119 // If the two extracted lanes are from the same place and adjacent, this
3120 // simplifies into a f32 lane move.
3121 if (Val1.getOperand(0) == Val2.getOperand(0) && ExtractLane2 % 2 == 0 &&
3122 ExtractLane1 == ExtractLane2 + 1) {
3123 SDValue NewExt = CurDAG->getTargetExtractSubreg(
3124 ARM::ssub_0 + ExtractLane2 / 2, dl, MVT::f32, Val1.getOperand(0));
3125 SDValue NewIns = CurDAG->getTargetInsertSubreg(
3126 ARM::ssub_0 + Lane2 / 2, dl, VT, Ins2.getOperand(0),
3127 NewExt);
3128 ReplaceUses(Ins1, NewIns);
3129 return true;
3130 }
3131
3132 // Else v8i16 pattern of an extract and an insert, with a optional vmovx for
3133 // extracting odd lanes.
3134 if (VT == MVT::v8i16) {
3135 SDValue Inp1 = CurDAG->getTargetExtractSubreg(
3136 ARM::ssub_0 + ExtractLane1 / 2, dl, MVT::f32, Val1.getOperand(0));
3137 SDValue Inp2 = CurDAG->getTargetExtractSubreg(
3138 ARM::ssub_0 + ExtractLane2 / 2, dl, MVT::f32, Val2.getOperand(0));
3139 if (ExtractLane1 % 2 != 0)
3140 Inp1 = SDValue(CurDAG->getMachineNode(ARM::VMOVH, dl, MVT::f32, Inp1), 0);
3141 if (ExtractLane2 % 2 != 0)
3142 Inp2 = SDValue(CurDAG->getMachineNode(ARM::VMOVH, dl, MVT::f32, Inp2), 0);
3143 SDNode *VINS = CurDAG->getMachineNode(ARM::VINSH, dl, MVT::f32, Inp2, Inp1);
3144 SDValue NewIns =
3145 CurDAG->getTargetInsertSubreg(ARM::ssub_0 + Lane2 / 2, dl, MVT::v4f32,
3146 Ins2.getOperand(0), SDValue(VINS, 0));
3147 ReplaceUses(Ins1, NewIns);
3148 return true;
3149 }
3150 }
3151
3152 // The inserted values are not extracted - if they are f16 then insert them
3153 // directly using a VINS.
3154 if (VT == MVT::v8f16) {
3155 SDNode *VINS = CurDAG->getMachineNode(ARM::VINSH, dl, MVT::f32, Val2, Val1);
3156 SDValue NewIns =
3157 CurDAG->getTargetInsertSubreg(ARM::ssub_0 + Lane2 / 2, dl, MVT::v4f32,
3158 Ins2.getOperand(0), SDValue(VINS, 0));
3159 ReplaceUses(Ins1, NewIns);
3160 return true;
3161 }
3162
3163 return false;
3164}
3165
3166bool ARMDAGToDAGISel::transformFixedFloatingPointConversion(SDNode *N,
3167 SDNode *FMul,
3168 bool IsUnsigned,
3169 bool FixedToFloat) {
3170 auto Type = N->getValueType(0);
3171 unsigned ScalarBits = Type.getScalarSizeInBits();
3172 if (ScalarBits > 32)
3173 return false;
3174
3175 SDNodeFlags FMulFlags = FMul->getFlags();
3176 // The fixed-point vcvt and vcvt+vmul are not always equivalent if inf is
3177 // allowed in 16 bit unsigned floats
3178 if (ScalarBits == 16 && !FMulFlags.hasNoInfs() && IsUnsigned)
3179 return false;
3180
3181 SDValue ImmNode = FMul->getOperand(1);
3182 SDValue VecVal = FMul->getOperand(0);
3183 if (VecVal->getOpcode() == ISD::UINT_TO_FP ||
3184 VecVal->getOpcode() == ISD::SINT_TO_FP)
3185 VecVal = VecVal->getOperand(0);
3186
3187 if (VecVal.getValueType().getScalarSizeInBits() != ScalarBits)
3188 return false;
3189
3190 if (ImmNode.getOpcode() == ISD::BITCAST) {
3191 if (ImmNode.getValueType().getScalarSizeInBits() != ScalarBits)
3192 return false;
3193 ImmNode = ImmNode.getOperand(0);
3194 }
3195
3196 if (ImmNode.getValueType().getScalarSizeInBits() != ScalarBits)
3197 return false;
3198
3199 APFloat ImmAPF(0.0f);
3200 switch (ImmNode.getOpcode()) {
3201 case ARMISD::VMOVIMM:
3202 case ARMISD::VDUP: {
3203 if (!isa<ConstantSDNode>(ImmNode.getOperand(0)))
3204 return false;
3205 unsigned Imm = ImmNode.getConstantOperandVal(0);
3206 if (ImmNode.getOpcode() == ARMISD::VMOVIMM)
3207 Imm = ARM_AM::decodeVMOVModImm(Imm, ScalarBits);
3208 ImmAPF =
3209 APFloat(ScalarBits == 32 ? APFloat::IEEEsingle() : APFloat::IEEEhalf(),
3210 APInt(ScalarBits, Imm));
3211 break;
3212 }
3213 case ARMISD::VMOVFPIMM: {
3214 ImmAPF = APFloat(ARM_AM::getFPImmFloat(ImmNode.getConstantOperandVal(0)));
3215 break;
3216 }
3217 default:
3218 return false;
3219 }
3220
3221 // Where n is the number of fractional bits, multiplying by 2^n will convert
3222 // from float to fixed and multiplying by 2^-n will convert from fixed to
3223 // float. Taking log2 of the factor (after taking the inverse in the case of
3224 // float to fixed) will give n.
3225 APFloat ToConvert = ImmAPF;
3226 if (FixedToFloat) {
3227 if (!ImmAPF.getExactInverse(&ToConvert))
3228 return false;
3229 }
3230 APSInt Converted(64, false);
3231 bool IsExact;
3232 ToConvert.convertToInteger(Converted, llvm::RoundingMode::NearestTiesToEven,
3233 &IsExact);
3234 if (!IsExact || !Converted.isPowerOf2())
3235 return false;
3236
3237 unsigned FracBits = Converted.logBase2();
3238 if (FracBits > ScalarBits)
3239 return false;
3240
3241 SmallVector<SDValue, 3> Ops{
3242 VecVal, CurDAG->getConstant(FracBits, SDLoc(N), MVT::i32)};
3243 AddEmptyMVEPredicateToOps(Ops, SDLoc(N), Type);
3244
3245 unsigned int Opcode;
3246 switch (ScalarBits) {
3247 case 16:
3248 if (FixedToFloat)
3249 Opcode = IsUnsigned ? ARM::MVE_VCVTf16u16_fix : ARM::MVE_VCVTf16s16_fix;
3250 else
3251 Opcode = IsUnsigned ? ARM::MVE_VCVTu16f16_fix : ARM::MVE_VCVTs16f16_fix;
3252 break;
3253 case 32:
3254 if (FixedToFloat)
3255 Opcode = IsUnsigned ? ARM::MVE_VCVTf32u32_fix : ARM::MVE_VCVTf32s32_fix;
3256 else
3257 Opcode = IsUnsigned ? ARM::MVE_VCVTu32f32_fix : ARM::MVE_VCVTs32f32_fix;
3258 break;
3259 default:
3260 llvm_unreachable("unexpected number of scalar bits")::llvm::llvm_unreachable_internal("unexpected number of scalar bits"
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 3260);
3261 break;
3262 }
3263
3264 ReplaceNode(N, CurDAG->getMachineNode(Opcode, SDLoc(N), Type, Ops));
3265 return true;
3266}
3267
3268bool ARMDAGToDAGISel::tryFP_TO_INT(SDNode *N, SDLoc dl) {
3269 // Transform a floating-point to fixed-point conversion to a VCVT
3270 if (!Subtarget->hasMVEFloatOps())
1
Assuming the condition is false
→
2
←
Taking false branch
→
3271 return false;
3272 EVT Type = N->getValueType(0);
3273 if (!Type.isVector())
3
←
Assuming the condition is false
→
4
←
Taking false branch
→
3274 return false;
3275 unsigned int ScalarBits = Type.getScalarSizeInBits();
3276
3277 bool IsUnsigned = N->getOpcode() == ISD::FP_TO_UINT ||
5
←
Assuming the condition is true
→
3278 N->getOpcode() == ISD::FP_TO_UINT_SAT;
3279 SDNode *Node = N->getOperand(0).getNode();
3280
3281 // floating-point to fixed-point with one fractional bit gets turned into an
3282 // FP_TO_[U|S]INT(FADD (x, x)) rather than an FP_TO_[U|S]INT(FMUL (x, y))
3283 if (Node->getOpcode() == ISD::FADD) {
6
←
Assuming the condition is true
→
7
←
Taking true branch
→
3284 if (Node->getOperand(0) != Node->getOperand(1))
8
←
Taking false branch
→
3285 return false;
3286 SDNodeFlags Flags = Node->getFlags();
3287 // The fixed-point vcvt and vcvt+vmul are not always equivalent if inf is
3288 // allowed in 16 bit unsigned floats
3289 if (ScalarBits == 16 && !Flags.hasNoInfs() && IsUnsigned)
9
←
Assuming 'ScalarBits' is not equal to 16
→
3290 return false;
3291
3292 unsigned Opcode;
10
←
'Opcode' declared without an initial value
→
3293 switch (ScalarBits) {
11
←
'Default' branch taken. Execution continues on line 3301
→
3294 case 16:
3295 Opcode = IsUnsigned ? ARM::MVE_VCVTu16f16_fix : ARM::MVE_VCVTs16f16_fix;
3296 break;
3297 case 32:
3298 Opcode = IsUnsigned ? ARM::MVE_VCVTu32f32_fix : ARM::MVE_VCVTs32f32_fix;
3299 break;
3300 }
3301 SmallVector<SDValue, 3> Ops{Node->getOperand(0),
3302 CurDAG->getConstant(1, dl, MVT::i32)};
3303 AddEmptyMVEPredicateToOps(Ops, dl, Type);
3304
3305 ReplaceNode(N, CurDAG->getMachineNode(Opcode, dl, Type, Ops));
12
←
1st function call argument is an uninitialized value
3306 return true;
3307 }
3308
3309 if (Node->getOpcode() != ISD::FMUL)
3310 return false;
3311
3312 return transformFixedFloatingPointConversion(N, Node, IsUnsigned, false);
3313}
3314
3315bool ARMDAGToDAGISel::tryFMULFixed(SDNode *N, SDLoc dl) {
3316 // Transform a fixed-point to floating-point conversion to a VCVT
3317 if (!Subtarget->hasMVEFloatOps())
3318 return false;
3319 auto Type = N->getValueType(0);
3320 if (!Type.isVector())
3321 return false;
3322
3323 auto LHS = N->getOperand(0);
3324 if (LHS.getOpcode() != ISD::SINT_TO_FP && LHS.getOpcode() != ISD::UINT_TO_FP)
3325 return false;
3326
3327 return transformFixedFloatingPointConversion(
3328 N, N, LHS.getOpcode() == ISD::UINT_TO_FP, true);
3329}
3330
3331bool ARMDAGToDAGISel::tryV6T2BitfieldExtractOp(SDNode *N, bool isSigned) {
3332 if (!Subtarget->hasV6T2Ops())
3333 return false;
3334
3335 unsigned Opc = isSigned
3336 ? (Subtarget->isThumb() ? ARM::t2SBFX : ARM::SBFX)
3337 : (Subtarget->isThumb() ? ARM::t2UBFX : ARM::UBFX);
3338 SDLoc dl(N);
3339
3340 // For unsigned extracts, check for a shift right and mask
3341 unsigned And_imm = 0;
3342 if (N->getOpcode() == ISD::AND) {
3343 if (isOpcWithIntImmediate(N, ISD::AND, And_imm)) {
3344
3345 // The immediate is a mask of the low bits iff imm & (imm+1) == 0
3346 if (And_imm & (And_imm + 1))
3347 return false;
3348
3349 unsigned Srl_imm = 0;
3350 if (isOpcWithIntImmediate(N->getOperand(0).getNode(), ISD::SRL,
3351 Srl_imm)) {
3352 assert(Srl_imm > 0 && Srl_imm < 32 && "bad amount in shift node!")(static_cast <bool> (Srl_imm > 0 && Srl_imm <
32 && "bad amount in shift node!") ? void (0) : __assert_fail
("Srl_imm > 0 && Srl_imm < 32 && \"bad amount in shift node!\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 3352, __extension__
__PRETTY_FUNCTION__));
3353
3354 // Mask off the unnecessary bits of the AND immediate; normally
3355 // DAGCombine will do this, but that might not happen if
3356 // targetShrinkDemandedConstant chooses a different immediate.
3357 And_imm &= -1U >> Srl_imm;
3358
3359 // Note: The width operand is encoded as width-1.
3360 unsigned Width = countTrailingOnes(And_imm) - 1;
3361 unsigned LSB = Srl_imm;
3362
3363 SDValue Reg0 = CurDAG->getRegister(0, MVT::i32);
3364
3365 if ((LSB + Width + 1) == N->getValueType(0).getSizeInBits()) {
3366 // It's cheaper to use a right shift to extract the top bits.
3367 if (Subtarget->isThumb()) {
3368 Opc = isSigned ? ARM::t2ASRri : ARM::t2LSRri;
3369 SDValue Ops[] = { N->getOperand(0).getOperand(0),
3370 CurDAG->getTargetConstant(LSB, dl, MVT::i32),
3371 getAL(CurDAG, dl), Reg0, Reg0 };
3372 CurDAG->SelectNodeTo(N, Opc, MVT::i32, Ops);
3373 return true;
3374 }
3375
3376 // ARM models shift instructions as MOVsi with shifter operand.
3377 ARM_AM::ShiftOpc ShOpcVal = ARM_AM::getShiftOpcForNode(ISD::SRL);
3378 SDValue ShOpc =
3379 CurDAG->getTargetConstant(ARM_AM::getSORegOpc(ShOpcVal, LSB), dl,
3380 MVT::i32);
3381 SDValue Ops[] = { N->getOperand(0).getOperand(0), ShOpc,
3382 getAL(CurDAG, dl), Reg0, Reg0 };
3383 CurDAG->SelectNodeTo(N, ARM::MOVsi, MVT::i32, Ops);
3384 return true;
3385 }
3386
3387 assert(LSB + Width + 1 <= 32 && "Shouldn't create an invalid ubfx")(static_cast <bool> (LSB + Width + 1 <= 32 &&
"Shouldn't create an invalid ubfx") ? void (0) : __assert_fail
("LSB + Width + 1 <= 32 && \"Shouldn't create an invalid ubfx\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 3387, __extension__
__PRETTY_FUNCTION__));
3388 SDValue Ops[] = { N->getOperand(0).getOperand(0),
3389 CurDAG->getTargetConstant(LSB, dl, MVT::i32),
3390 CurDAG->getTargetConstant(Width, dl, MVT::i32),
3391 getAL(CurDAG, dl), Reg0 };
3392 CurDAG->SelectNodeTo(N, Opc, MVT::i32, Ops);
3393 return true;
3394 }
3395 }
3396 return false;
3397 }
3398
3399 // Otherwise, we're looking for a shift of a shift
3400 unsigned Shl_imm = 0;
3401 if (isOpcWithIntImmediate(N->getOperand(0).getNode(), ISD::SHL, Shl_imm)) {
3402 assert(Shl_imm > 0 && Shl_imm < 32 && "bad amount in shift node!")(static_cast <bool> (Shl_imm > 0 && Shl_imm <
32 && "bad amount in shift node!") ? void (0) : __assert_fail
("Shl_imm > 0 && Shl_imm < 32 && \"bad amount in shift node!\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 3402, __extension__
__PRETTY_FUNCTION__));
3403 unsigned Srl_imm = 0;
3404 if (isInt32Immediate(N->getOperand(1), Srl_imm)) {
3405 assert(Srl_imm > 0 && Srl_imm < 32 && "bad amount in shift node!")(static_cast <bool> (Srl_imm > 0 && Srl_imm <
32 && "bad amount in shift node!") ? void (0) : __assert_fail
("Srl_imm > 0 && Srl_imm < 32 && \"bad amount in shift node!\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 3405, __extension__
__PRETTY_FUNCTION__));
3406 // Note: The width operand is encoded as width-1.
3407 unsigned Width = 32 - Srl_imm - 1;
3408 int LSB = Srl_imm - Shl_imm;
3409 if (LSB < 0)
3410 return false;
3411 SDValue Reg0 = CurDAG->getRegister(0, MVT::i32);
3412 assert(LSB + Width + 1 <= 32 && "Shouldn't create an invalid ubfx")(static_cast <bool> (LSB + Width + 1 <= 32 &&
"Shouldn't create an invalid ubfx") ? void (0) : __assert_fail
("LSB + Width + 1 <= 32 && \"Shouldn't create an invalid ubfx\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 3412, __extension__
__PRETTY_FUNCTION__));
3413 SDValue Ops[] = { N->getOperand(0).getOperand(0),
3414 CurDAG->getTargetConstant(LSB, dl, MVT::i32),
3415 CurDAG->getTargetConstant(Width, dl, MVT::i32),
3416 getAL(CurDAG, dl), Reg0 };
3417 CurDAG->SelectNodeTo(N, Opc, MVT::i32, Ops);
3418 return true;
3419 }
3420 }
3421
3422 // Or we are looking for a shift of an and, with a mask operand
3423 if (isOpcWithIntImmediate(N->getOperand(0).getNode(), ISD::AND, And_imm) &&
3424 isShiftedMask_32(And_imm)) {
3425 unsigned Srl_imm = 0;
3426 unsigned LSB = countTrailingZeros(And_imm);
3427 // Shift must be the same as the ands lsb
3428 if (isInt32Immediate(N->getOperand(1), Srl_imm) && Srl_imm == LSB) {
3429 assert(Srl_imm > 0 && Srl_imm < 32 && "bad amount in shift node!")(static_cast <bool> (Srl_imm > 0 && Srl_imm <
32 && "bad amount in shift node!") ? void (0) : __assert_fail
("Srl_imm > 0 && Srl_imm < 32 && \"bad amount in shift node!\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 3429, __extension__
__PRETTY_FUNCTION__));
3430 unsigned MSB = 31 - countLeadingZeros(And_imm);
3431 // Note: The width operand is encoded as width-1.
3432 unsigned Width = MSB - LSB;
3433 SDValue Reg0 = CurDAG->getRegister(0, MVT::i32);
3434 assert(Srl_imm + Width + 1 <= 32 && "Shouldn't create an invalid ubfx")(static_cast <bool> (Srl_imm + Width + 1 <= 32 &&
"Shouldn't create an invalid ubfx") ? void (0) : __assert_fail
("Srl_imm + Width + 1 <= 32 && \"Shouldn't create an invalid ubfx\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 3434, __extension__
__PRETTY_FUNCTION__));
3435 SDValue Ops[] = { N->getOperand(0).getOperand(0),
3436 CurDAG->getTargetConstant(Srl_imm, dl, MVT::i32),
3437 CurDAG->getTargetConstant(Width, dl, MVT::i32),
3438 getAL(CurDAG, dl), Reg0 };
3439 CurDAG->SelectNodeTo(N, Opc, MVT::i32, Ops);
3440 return true;
3441 }
3442 }
3443
3444 if (N->getOpcode() == ISD::SIGN_EXTEND_INREG) {
3445 unsigned Width = cast<VTSDNode>(N->getOperand(1))->getVT().getSizeInBits();
3446 unsigned LSB = 0;
3447 if (!isOpcWithIntImmediate(N->getOperand(0).getNode(), ISD::SRL, LSB) &&
3448 !isOpcWithIntImmediate(N->getOperand(0).getNode(), ISD::SRA, LSB))
3449 return false;
3450
3451 if (LSB + Width > 32)
3452 return false;
3453
3454 SDValue Reg0 = CurDAG->getRegister(0, MVT::i32);
3455 assert(LSB + Width <= 32 && "Shouldn't create an invalid ubfx")(static_cast <bool> (LSB + Width <= 32 && "Shouldn't create an invalid ubfx"
) ? void (0) : __assert_fail ("LSB + Width <= 32 && \"Shouldn't create an invalid ubfx\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 3455, __extension__
__PRETTY_FUNCTION__));
3456 SDValue Ops[] = { N->getOperand(0).getOperand(0),
3457 CurDAG->getTargetConstant(LSB, dl, MVT::i32),
3458 CurDAG->getTargetConstant(Width - 1, dl, MVT::i32),
3459 getAL(CurDAG, dl), Reg0 };
3460 CurDAG->SelectNodeTo(N, Opc, MVT::i32, Ops);
3461 return true;
3462 }
3463
3464 return false;
3465}
3466
3467/// Target-specific DAG combining for ISD::SUB.
3468/// Target-independent combining lowers SELECT_CC nodes of the form
3469/// select_cc setg[ge] X, 0, X, -X
3470/// select_cc setgt X, -1, X, -X
3471/// select_cc setl[te] X, 0, -X, X
3472/// select_cc setlt X, 1, -X, X
3473/// which represent Integer ABS into:
3474/// Y = sra (X, size(X)-1); sub (xor (X, Y), Y)
3475/// ARM instruction selection detects the latter and matches it to
3476/// ARM::ABS or ARM::t2ABS machine node.
3477bool ARMDAGToDAGISel::tryABSOp(SDNode *N){
3478 SDValue SUBSrc0 = N->getOperand(0);
3479 SDValue SUBSrc1 = N->getOperand(1);
3480 EVT VT = N->getValueType(0);
3481
3482 if (Subtarget->isThumb1Only())
3483 return false;
3484
3485 if (SUBSrc0.getOpcode() != ISD::XOR || SUBSrc1.getOpcode() != ISD::SRA)
3486 return false;
3487
3488 SDValue XORSrc0 = SUBSrc0.getOperand(0);
3489 SDValue XORSrc1 = SUBSrc0.getOperand(1);
3490 SDValue SRASrc0 = SUBSrc1.getOperand(0);
3491 SDValue SRASrc1 = SUBSrc1.getOperand(1);
3492 ConstantSDNode *SRAConstant = dyn_cast<ConstantSDNode>(SRASrc1);
3493 EVT XType = SRASrc0.getValueType();
3494 unsigned Size = XType.getSizeInBits() - 1;
3495
3496 if (XORSrc1 == SUBSrc1 && XORSrc0 == SRASrc0 && XType.isInteger() &&
3497 SRAConstant != nullptr && Size == SRAConstant->getZExtValue()) {
3498 unsigned Opcode = Subtarget->isThumb2() ? ARM::t2ABS : ARM::ABS;
3499 CurDAG->SelectNodeTo(N, Opcode, VT, XORSrc0);
3500 return true;
3501 }
3502
3503 return false;
3504}
3505
3506/// We've got special pseudo-instructions for these
3507void ARMDAGToDAGISel::SelectCMP_SWAP(SDNode *N) {
3508 unsigned Opcode;
3509 EVT MemTy = cast<MemSDNode>(N)->getMemoryVT();
3510 if (MemTy == MVT::i8)
3511 Opcode = Subtarget->isThumb() ? ARM::tCMP_SWAP_8 : ARM::CMP_SWAP_8;
3512 else if (MemTy == MVT::i16)
3513 Opcode = Subtarget->isThumb() ? ARM::tCMP_SWAP_16 : ARM::CMP_SWAP_16;
3514 else if (MemTy == MVT::i32)
3515 Opcode = ARM::CMP_SWAP_32;
3516 else
3517 llvm_unreachable("Unknown AtomicCmpSwap type")::llvm::llvm_unreachable_internal("Unknown AtomicCmpSwap type"
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 3517);
3518
3519 SDValue Ops[] = {N->getOperand(1), N->getOperand(2), N->getOperand(3),
3520 N->getOperand(0)};
3521 SDNode *CmpSwap = CurDAG->getMachineNode(
3522 Opcode, SDLoc(N),
3523 CurDAG->getVTList(MVT::i32, MVT::i32, MVT::Other), Ops);
3524
3525 MachineMemOperand *MemOp = cast<MemSDNode>(N)->getMemOperand();
3526 CurDAG->setNodeMemRefs(cast<MachineSDNode>(CmpSwap), {MemOp});
3527
3528 ReplaceUses(SDValue(N, 0), SDValue(CmpSwap, 0));
3529 ReplaceUses(SDValue(N, 1), SDValue(CmpSwap, 2));
3530 CurDAG->RemoveDeadNode(N);
3531}
3532
3533static Optional<std::pair<unsigned, unsigned>>
3534getContiguousRangeOfSetBits(const APInt &A) {
3535 unsigned FirstOne = A.getBitWidth() - A.countLeadingZeros() - 1;
3536 unsigned LastOne = A.countTrailingZeros();
3537 if (A.countPopulation() != (FirstOne - LastOne + 1))
3538 return Optional<std::pair<unsigned,unsigned>>();
3539 return std::make_pair(FirstOne, LastOne);
3540}
3541
3542void ARMDAGToDAGISel::SelectCMPZ(SDNode *N, bool &SwitchEQNEToPLMI) {
3543 assert(N->getOpcode() == ARMISD::CMPZ)(static_cast <bool> (N->getOpcode() == ARMISD::CMPZ)
? void (0) : __assert_fail ("N->getOpcode() == ARMISD::CMPZ"
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 3543, __extension__
__PRETTY_FUNCTION__));
3544 SwitchEQNEToPLMI = false;
3545
3546 if (!Subtarget->isThumb())
3547 // FIXME: Work out whether it is profitable to do this in A32 mode - LSL and
3548 // LSR don't exist as standalone instructions - they need the barrel shifter.
3549 return;
3550
3551 // select (cmpz (and X, C), #0) -> (LSLS X) or (LSRS X) or (LSRS (LSLS X))
3552 SDValue And = N->getOperand(0);
3553 if (!And->hasOneUse())
3554 return;
3555
3556 SDValue Zero = N->getOperand(1);
3557 if (!isa<ConstantSDNode>(Zero) || !cast<ConstantSDNode>(Zero)->isZero() ||
3558 And->getOpcode() != ISD::AND)
3559 return;
3560 SDValue X = And.getOperand(0);
3561 auto C = dyn_cast<ConstantSDNode>(And.getOperand(1));
3562
3563 if (!C)
3564 return;
3565 auto Range = getContiguousRangeOfSetBits(C->getAPIntValue());
3566 if (!Range)
3567 return;
3568
3569 // There are several ways to lower this:
3570 SDNode *NewN;
3571 SDLoc dl(N);
3572
3573 auto EmitShift = [&](unsigned Opc, SDValue Src, unsigned Imm) -> SDNode* {
3574 if (Subtarget->isThumb2()) {
3575 Opc = (Opc == ARM::tLSLri) ? ARM::t2LSLri : ARM::t2LSRri;
3576 SDValue Ops[] = { Src, CurDAG->getTargetConstant(Imm, dl, MVT::i32),
3577 getAL(CurDAG, dl), CurDAG->getRegister(0, MVT::i32),
3578 CurDAG->getRegister(0, MVT::i32) };
3579 return CurDAG->getMachineNode(Opc, dl, MVT::i32, Ops);
3580 } else {
3581 SDValue Ops[] = {CurDAG->getRegister(ARM::CPSR, MVT::i32), Src,
3582 CurDAG->getTargetConstant(Imm, dl, MVT::i32),
3583 getAL(CurDAG, dl), CurDAG->getRegister(0, MVT::i32)};
3584 return CurDAG->getMachineNode(Opc, dl, MVT::i32, Ops);
3585 }
3586 };
3587
3588 if (Range->second == 0) {
3589 // 1. Mask includes the LSB -> Simply shift the top N bits off
3590 NewN = EmitShift(ARM::tLSLri, X, 31 - Range->first);
3591 ReplaceNode(And.getNode(), NewN);
3592 } else if (Range->first == 31) {
3593 // 2. Mask includes the MSB -> Simply shift the bottom N bits off
3594 NewN = EmitShift(ARM::tLSRri, X, Range->second);
3595 ReplaceNode(And.getNode(), NewN);
3596 } else if (Range->first == Range->second) {
3597 // 3. Only one bit is set. We can shift this into the sign bit and use a
3598 // PL/MI comparison.
3599 NewN = EmitShift(ARM::tLSLri, X, 31 - Range->first);
3600 ReplaceNode(And.getNode(), NewN);
3601
3602 SwitchEQNEToPLMI = true;
3603 } else if (!Subtarget->hasV6T2Ops()) {
3604 // 4. Do a double shift to clear bottom and top bits, but only in
3605 // thumb-1 mode as in thumb-2 we can use UBFX.
3606 NewN = EmitShift(ARM::tLSLri, X, 31 - Range->first);
3607 NewN = EmitShift(ARM::tLSRri, SDValue(NewN, 0),
3608 Range->second + (31 - Range->first));
3609 ReplaceNode(And.getNode(), NewN);
3610 }
3611
3612}
3613
3614void ARMDAGToDAGISel::Select(SDNode *N) {
3615 SDLoc dl(N);
3616
3617 if (N->isMachineOpcode()) {
3618 N->setNodeId(-1);
3619 return; // Already selected.
3620 }
3621
3622 switch (N->getOpcode()) {
3623 default: break;
3624 case ISD::STORE: {
3625 // For Thumb1, match an sp-relative store in C++. This is a little
3626 // unfortunate, but I don't think I can make the chain check work
3627 // otherwise. (The chain of the store has to be the same as the chain
3628 // of the CopyFromReg, or else we can't replace the CopyFromReg with
3629 // a direct reference to "SP".)
3630 //
3631 // This is only necessary on Thumb1 because Thumb1 sp-relative stores use
3632 // a different addressing mode from other four-byte stores.
3633 //
3634 // This pattern usually comes up with call arguments.
3635 StoreSDNode *ST = cast<StoreSDNode>(N);
3636 SDValue Ptr = ST->getBasePtr();
3637 if (Subtarget->isThumb1Only() && ST->isUnindexed()) {
3638 int RHSC = 0;
3639 if (Ptr.getOpcode() == ISD::ADD &&
3640 isScaledConstantInRange(Ptr.getOperand(1), /*Scale=*/4, 0, 256, RHSC))
3641 Ptr = Ptr.getOperand(0);
3642
3643 if (Ptr.getOpcode() == ISD::CopyFromReg &&
3644 cast<RegisterSDNode>(Ptr.getOperand(1))->getReg() == ARM::SP &&
3645 Ptr.getOperand(0) == ST->getChain()) {
3646 SDValue Ops[] = {ST->getValue(),
3647 CurDAG->getRegister(ARM::SP, MVT::i32),
3648 CurDAG->getTargetConstant(RHSC, dl, MVT::i32),
3649 getAL(CurDAG, dl),
3650 CurDAG->getRegister(0, MVT::i32),
3651 ST->getChain()};
3652 MachineSDNode *ResNode =
3653 CurDAG->getMachineNode(ARM::tSTRspi, dl, MVT::Other, Ops);
3654 MachineMemOperand *MemOp = ST->getMemOperand();
3655 CurDAG->setNodeMemRefs(cast<MachineSDNode>(ResNode), {MemOp});
3656 ReplaceNode(N, ResNode);
3657 return;
3658 }
3659 }
3660 break;
3661 }
3662 case ISD::WRITE_REGISTER:
3663 if (tryWriteRegister(N))
3664 return;
3665 break;
3666 case ISD::READ_REGISTER:
3667 if (tryReadRegister(N))
3668 return;
3669 break;
3670 case ISD::INLINEASM:
3671 case ISD::INLINEASM_BR:
3672 if (tryInlineAsm(N))
3673 return;
3674 break;
3675 case ISD::SUB:
3676 // Select special operations if SUB node forms integer ABS pattern
3677 if (tryABSOp(N))
3678 return;
3679 // Other cases are autogenerated.
3680 break;
3681 case ISD::Constant: {
3682 unsigned Val = cast<ConstantSDNode>(N)->getZExtValue();
3683 // If we can't materialize the constant we need to use a literal pool
3684 if (ConstantMaterializationCost(Val, Subtarget) > 2) {
3685 SDValue CPIdx = CurDAG->getTargetConstantPool(
3686 ConstantInt::get(Type::getInt32Ty(*CurDAG->getContext()), Val),
3687 TLI->getPointerTy(CurDAG->getDataLayout()));
3688
3689 SDNode *ResNode;
3690 if (Subtarget->isThumb()) {
3691 SDValue Ops[] = {
3692 CPIdx,
3693 getAL(CurDAG, dl),
3694 CurDAG->getRegister(0, MVT::i32),
3695 CurDAG->getEntryNode()
3696 };
3697 ResNode = CurDAG->getMachineNode(ARM::tLDRpci, dl, MVT::i32, MVT::Other,
3698 Ops);
3699 } else {
3700 SDValue Ops[] = {
3701 CPIdx,
3702 CurDAG->getTargetConstant(0, dl, MVT::i32),
3703 getAL(CurDAG, dl),
3704 CurDAG->getRegister(0, MVT::i32),
3705 CurDAG->getEntryNode()
3706 };
3707 ResNode = CurDAG->getMachineNode(ARM::LDRcp, dl, MVT::i32, MVT::Other,
3708 Ops);
3709 }
3710 // Annotate the Node with memory operand information so that MachineInstr
3711 // queries work properly. This e.g. gives the register allocation the
3712 // required information for rematerialization.
3713 MachineFunction& MF = CurDAG->getMachineFunction();
3714 MachineMemOperand *MemOp =
3715 MF.getMachineMemOperand(MachinePointerInfo::getConstantPool(MF),
3716 MachineMemOperand::MOLoad, 4, Align(4));
3717
3718 CurDAG->setNodeMemRefs(cast<MachineSDNode>(ResNode), {MemOp});
3719
3720 ReplaceNode(N, ResNode);
3721 return;
3722 }
3723
3724 // Other cases are autogenerated.
3725 break;
3726 }
3727 case ISD::FrameIndex: {
3728 // Selects to ADDri FI, 0 which in turn will become ADDri SP, imm.
3729 int FI = cast<FrameIndexSDNode>(N)->getIndex();
3730 SDValue TFI = CurDAG->getTargetFrameIndex(
3731 FI, TLI->getPointerTy(CurDAG->getDataLayout()));
3732 if (Subtarget->isThumb1Only()) {
3733 // Set the alignment of the frame object to 4, to avoid having to generate
3734 // more than one ADD
3735 MachineFrameInfo &MFI = MF->getFrameInfo();
3736 if (MFI.getObjectAlign(FI) < Align(4))
3737 MFI.setObjectAlignment(FI, Align(4));
3738 CurDAG->SelectNodeTo(N, ARM::tADDframe, MVT::i32, TFI,
3739 CurDAG->getTargetConstant(0, dl, MVT::i32));
3740 return;
3741 } else {
3742 unsigned Opc = ((Subtarget->isThumb() && Subtarget->hasThumb2()) ?
3743 ARM::t2ADDri : ARM::ADDri);
3744 SDValue Ops[] = { TFI, CurDAG->getTargetConstant(0, dl, MVT::i32),
3745 getAL(CurDAG, dl), CurDAG->getRegister(0, MVT::i32),
3746 CurDAG->getRegister(0, MVT::i32) };
3747 CurDAG->SelectNodeTo(N, Opc, MVT::i32, Ops);
3748 return;
3749 }
3750 }
3751 case ISD::INSERT_VECTOR_ELT: {
3752 if (tryInsertVectorElt(N))
3753 return;
3754 break;
3755 }
3756 case ISD::SRL:
3757 if (tryV6T2BitfieldExtractOp(N, false))
3758 return;
3759 break;
3760 case ISD::SIGN_EXTEND_INREG:
3761 case ISD::SRA:
3762 if (tryV6T2BitfieldExtractOp(N, true))
3763 return;
3764 break;
3765 case ISD::FP_TO_UINT:
3766 case ISD::FP_TO_SINT:
3767 case ISD::FP_TO_UINT_SAT:
3768 case ISD::FP_TO_SINT_SAT:
3769 if (tryFP_TO_INT(N, dl))
3770 return;
3771 break;
3772 case ISD::FMUL:
3773 if (tryFMULFixed(N, dl))
3774 return;
3775 break;
3776 case ISD::MUL:
3777 if (Subtarget->isThumb1Only())
3778 break;
3779 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1))) {
3780 unsigned RHSV = C->getZExtValue();
3781 if (!RHSV) break;
3782 if (isPowerOf2_32(RHSV-1)) { // 2^n+1?
3783 unsigned ShImm = Log2_32(RHSV-1);
3784 if (ShImm >= 32)
3785 break;
3786 SDValue V = N->getOperand(0);
3787 ShImm = ARM_AM::getSORegOpc(ARM_AM::lsl, ShImm);
3788 SDValue ShImmOp = CurDAG->getTargetConstant(ShImm, dl, MVT::i32);
3789 SDValue Reg0 = CurDAG->getRegister(0, MVT::i32);
3790 if (Subtarget->isThumb()) {
3791 SDValue Ops[] = { V, V, ShImmOp, getAL(CurDAG, dl), Reg0, Reg0 };
3792 CurDAG->SelectNodeTo(N, ARM::t2ADDrs, MVT::i32, Ops);
3793 return;
3794 } else {
3795 SDValue Ops[] = { V, V, Reg0, ShImmOp, getAL(CurDAG, dl), Reg0,
3796 Reg0 };
3797 CurDAG->SelectNodeTo(N, ARM::ADDrsi, MVT::i32, Ops);
3798 return;
3799 }
3800 }
3801 if (isPowerOf2_32(RHSV+1)) { // 2^n-1?
3802 unsigned ShImm = Log2_32(RHSV+1);
3803 if (ShImm >= 32)
3804 break;
3805 SDValue V = N->getOperand(0);
3806 ShImm = ARM_AM::getSORegOpc(ARM_AM::lsl, ShImm);
3807 SDValue ShImmOp = CurDAG->getTargetConstant(ShImm, dl, MVT::i32);
3808 SDValue Reg0 = CurDAG->getRegister(0, MVT::i32);
3809 if (Subtarget->isThumb()) {
3810 SDValue Ops[] = { V, V, ShImmOp, getAL(CurDAG, dl), Reg0, Reg0 };
3811 CurDAG->SelectNodeTo(N, ARM::t2RSBrs, MVT::i32, Ops);
3812 return;
3813 } else {
3814 SDValue Ops[] = { V, V, Reg0, ShImmOp, getAL(CurDAG, dl), Reg0,
3815 Reg0 };
3816 CurDAG->SelectNodeTo(N, ARM::RSBrsi, MVT::i32, Ops);
3817 return;
3818 }
3819 }
3820 }
3821 break;
3822 case ISD::AND: {
3823 // Check for unsigned bitfield extract
3824 if (tryV6T2BitfieldExtractOp(N, false))
3825 return;
3826
3827 // If an immediate is used in an AND node, it is possible that the immediate
3828 // can be more optimally materialized when negated. If this is the case we
3829 // can negate the immediate and use a BIC instead.
3830 auto *N1C = dyn_cast<ConstantSDNode>(N->getOperand(1));
3831 if (N1C && N1C->hasOneUse() && Subtarget->isThumb()) {
3832 uint32_t Imm = (uint32_t) N1C->getZExtValue();
3833
3834 // In Thumb2 mode, an AND can take a 12-bit immediate. If this
3835 // immediate can be negated and fit in the immediate operand of
3836 // a t2BIC, don't do any manual transform here as this can be
3837 // handled by the generic ISel machinery.
3838 bool PreferImmediateEncoding =
3839 Subtarget->hasThumb2() && (is_t2_so_imm(Imm) || is_t2_so_imm_not(Imm));
3840 if (!PreferImmediateEncoding &&
3841 ConstantMaterializationCost(Imm, Subtarget) >
3842 ConstantMaterializationCost(~Imm, Subtarget)) {
3843 // The current immediate costs more to materialize than a negated
3844 // immediate, so negate the immediate and use a BIC.
3845 SDValue NewImm =
3846 CurDAG->getConstant(~N1C->getZExtValue(), dl, MVT::i32);
3847 // If the new constant didn't exist before, reposition it in the topological
3848 // ordering so it is just before N. Otherwise, don't touch its location.
3849 if (NewImm->getNodeId() == -1)
3850 CurDAG->RepositionNode(N->getIterator(), NewImm.getNode());
3851
3852 if (!Subtarget->hasThumb2()) {
3853 SDValue Ops[] = {CurDAG->getRegister(ARM::CPSR, MVT::i32),
3854 N->getOperand(0), NewImm, getAL(CurDAG, dl),
3855 CurDAG->getRegister(0, MVT::i32)};
3856 ReplaceNode(N, CurDAG->getMachineNode(ARM::tBIC, dl, MVT::i32, Ops));
3857 return;
3858 } else {
3859 SDValue Ops[] = {N->getOperand(0), NewImm, getAL(CurDAG, dl),
3860 CurDAG->getRegister(0, MVT::i32),
3861 CurDAG->getRegister(0, MVT::i32)};
3862 ReplaceNode(N,
3863 CurDAG->getMachineNode(ARM::t2BICrr, dl, MVT::i32, Ops));
3864 return;
3865 }
3866 }
3867 }
3868
3869 // (and (or x, c2), c1) and top 16-bits of c1 and c2 match, lower 16-bits
3870 // of c1 are 0xffff, and lower 16-bit of c2 are 0. That is, the top 16-bits
3871 // are entirely contributed by c2 and lower 16-bits are entirely contributed
3872 // by x. That's equal to (or (and x, 0xffff), (and c1, 0xffff0000)).
3873 // Select it to: "movt x, ((c1 & 0xffff) >> 16)
3874 EVT VT = N->getValueType(0);
3875 if (VT != MVT::i32)
3876 break;
3877 unsigned Opc = (Subtarget->isThumb() && Subtarget->hasThumb2())
3878 ? ARM::t2MOVTi16
3879 : (Subtarget->hasV6T2Ops() ? ARM::MOVTi16 : 0);
3880 if (!Opc)
3881 break;
3882 SDValue N0 = N->getOperand(0), N1 = N->getOperand(1);
3883 N1C = dyn_cast<ConstantSDNode>(N1);
3884 if (!N1C)
3885 break;
3886 if (N0.getOpcode() == ISD::OR && N0.getNode()->hasOneUse()) {
3887 SDValue N2 = N0.getOperand(1);
3888 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2);
3889 if (!N2C)
3890 break;
3891 unsigned N1CVal = N1C->getZExtValue();
3892 unsigned N2CVal = N2C->getZExtValue();
3893 if ((N1CVal & 0xffff0000U) == (N2CVal & 0xffff0000U) &&
3894 (N1CVal & 0xffffU) == 0xffffU &&
3895 (N2CVal & 0xffffU) == 0x0U) {
3896 SDValue Imm16 = CurDAG->getTargetConstant((N2CVal & 0xFFFF0000U) >> 16,
3897 dl, MVT::i32);
3898 SDValue Ops[] = { N0.getOperand(0), Imm16,
3899 getAL(CurDAG, dl), CurDAG->getRegister(0, MVT::i32) };
3900 ReplaceNode(N, CurDAG->getMachineNode(Opc, dl, VT, Ops));
3901 return;
3902 }
3903 }
3904
3905 break;
3906 }
3907 case ARMISD::UMAAL: {
3908 unsigned Opc = Subtarget->isThumb() ? ARM::t2UMAAL : ARM::UMAAL;
3909 SDValue Ops[] = { N->getOperand(0), N->getOperand(1),
3910 N->getOperand(2), N->getOperand(3),
3911 getAL(CurDAG, dl),
3912 CurDAG->getRegister(0, MVT::i32) };
3913 ReplaceNode(N, CurDAG->getMachineNode(Opc, dl, MVT::i32, MVT::i32, Ops));
3914 return;
3915 }
3916 case ARMISD::UMLAL:{
3917 if (Subtarget->isThumb()) {
3918 SDValue Ops[] = { N->getOperand(0), N->getOperand(1), N->getOperand(2),
3919 N->getOperand(3), getAL(CurDAG, dl),
3920 CurDAG->getRegister(0, MVT::i32)};
3921 ReplaceNode(
3922 N, CurDAG->getMachineNode(ARM::t2UMLAL, dl, MVT::i32, MVT::i32, Ops));
3923 return;
3924 }else{
3925 SDValue Ops[] = { N->getOperand(0), N->getOperand(1), N->getOperand(2),
3926 N->getOperand(3), getAL(CurDAG, dl),
3927 CurDAG->getRegister(0, MVT::i32),
3928 CurDAG->getRegister(0, MVT::i32) };
3929 ReplaceNode(N, CurDAG->getMachineNode(
3930 Subtarget->hasV6Ops() ? ARM::UMLAL : ARM::UMLALv5, dl,
3931 MVT::i32, MVT::i32, Ops));
3932 return;
3933 }
3934 }
3935 case ARMISD::SMLAL:{
3936 if (Subtarget->isThumb()) {
3937 SDValue Ops[] = { N->getOperand(0), N->getOperand(1), N->getOperand(2),
3938 N->getOperand(3), getAL(CurDAG, dl),
3939 CurDAG->getRegister(0, MVT::i32)};
3940 ReplaceNode(
3941 N, CurDAG->getMachineNode(ARM::t2SMLAL, dl, MVT::i32, MVT::i32, Ops));
3942 return;
3943 }else{
3944 SDValue Ops[] = { N->getOperand(0), N->getOperand(1), N->getOperand(2),
3945 N->getOperand(3), getAL(CurDAG, dl),
3946 CurDAG->getRegister(0, MVT::i32),
3947 CurDAG->getRegister(0, MVT::i32) };
3948 ReplaceNode(N, CurDAG->getMachineNode(
3949 Subtarget->hasV6Ops() ? ARM::SMLAL : ARM::SMLALv5, dl,
3950 MVT::i32, MVT::i32, Ops));
3951 return;
3952 }
3953 }
3954 case ARMISD::SUBE: {
3955 if (!Subtarget->hasV6Ops() || !Subtarget->hasDSP())
3956 break;
3957 // Look for a pattern to match SMMLS
3958 // (sube a, (smul_loHi a, b), (subc 0, (smul_LOhi(a, b))))
3959 if (N->getOperand(1).getOpcode() != ISD::SMUL_LOHI ||
3960 N->getOperand(2).getOpcode() != ARMISD::SUBC ||
3961 !SDValue(N, 1).use_empty())
3962 break;
3963
3964 if (Subtarget->isThumb())
3965 assert(Subtarget->hasThumb2() &&(static_cast <bool> (Subtarget->hasThumb2() &&
"This pattern should not be generated for Thumb") ? void (0)
: __assert_fail ("Subtarget->hasThumb2() && \"This pattern should not be generated for Thumb\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 3966, __extension__
__PRETTY_FUNCTION__))
3966 "This pattern should not be generated for Thumb")(static_cast <bool> (Subtarget->hasThumb2() &&
"This pattern should not be generated for Thumb") ? void (0)
: __assert_fail ("Subtarget->hasThumb2() && \"This pattern should not be generated for Thumb\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 3966, __extension__
__PRETTY_FUNCTION__));
3967
3968 SDValue SmulLoHi = N->getOperand(1);
3969 SDValue Subc = N->getOperand(2);
3970 auto *Zero = dyn_cast<ConstantSDNode>(Subc.getOperand(0));
3971
3972 if (!Zero || Zero->getZExtValue() != 0 ||
3973 Subc.getOperand(1) != SmulLoHi.getValue(0) ||
3974 N->getOperand(1) != SmulLoHi.getValue(1) ||
3975 N->getOperand(2) != Subc.getValue(1))
3976 break;
3977
3978 unsigned Opc = Subtarget->isThumb2() ? ARM::t2SMMLS : ARM::SMMLS;
3979 SDValue Ops[] = { SmulLoHi.getOperand(0), SmulLoHi.getOperand(1),
3980 N->getOperand(0), getAL(CurDAG, dl),
3981 CurDAG->getRegister(0, MVT::i32) };
3982 ReplaceNode(N, CurDAG->getMachineNode(Opc, dl, MVT::i32, Ops));
3983 return;
3984 }
3985 case ISD::LOAD: {
3986 if (Subtarget->hasMVEIntegerOps() && tryMVEIndexedLoad(N))
3987 return;
3988 if (Subtarget->isThumb() && Subtarget->hasThumb2()) {
3989 if (tryT2IndexedLoad(N))
3990 return;
3991 } else if (Subtarget->isThumb()) {
3992 if (tryT1IndexedLoad(N))
3993 return;
3994 } else if (tryARMIndexedLoad(N))
3995 return;
3996 // Other cases are autogenerated.
3997 break;
3998 }
3999 case ISD::MLOAD:
4000 if (Subtarget->hasMVEIntegerOps() && tryMVEIndexedLoad(N))
4001 return;
4002 // Other cases are autogenerated.
4003 break;
4004 case ARMISD::WLSSETUP: {
4005 SDNode *New = CurDAG->getMachineNode(ARM::t2WhileLoopSetup, dl, MVT::i32,
4006 N->getOperand(0));
4007 ReplaceUses(N, New);
4008 CurDAG->RemoveDeadNode(N);
4009 return;
4010 }
4011 case ARMISD::WLS: {
4012 SDNode *New = CurDAG->getMachineNode(ARM::t2WhileLoopStart, dl, MVT::Other,
4013 N->getOperand(1), N->getOperand(2),
4014 N->getOperand(0));
4015 ReplaceUses(N, New);
4016 CurDAG->RemoveDeadNode(N);
4017 return;
4018 }
4019 case ARMISD::LE: {
4020 SDValue Ops[] = { N->getOperand(1),
4021 N->getOperand(2),
4022 N->getOperand(0) };
4023 unsigned Opc = ARM::t2LoopEnd;
4024 SDNode *New = CurDAG->getMachineNode(Opc, dl, MVT::Other, Ops);
4025 ReplaceUses(N, New);
4026 CurDAG->RemoveDeadNode(N);
4027 return;
4028 }
4029 case ARMISD::LDRD: {
4030 if (Subtarget->isThumb2())
4031 break; // TableGen handles isel in this case.
4032 SDValue Base, RegOffset, ImmOffset;
4033 const SDValue &Chain = N->getOperand(0);
4034 const SDValue &Addr = N->getOperand(1);
4035 SelectAddrMode3(Addr, Base, RegOffset, ImmOffset);
4036 if (RegOffset != CurDAG->getRegister(0, MVT::i32)) {
4037 // The register-offset variant of LDRD mandates that the register
4038 // allocated to RegOffset is not reused in any of the remaining operands.
4039 // This restriction is currently not enforced. Therefore emitting this
4040 // variant is explicitly avoided.
4041 Base = Addr;
4042 RegOffset = CurDAG->getRegister(0, MVT::i32);
4043 }
4044 SDValue Ops[] = {Base, RegOffset, ImmOffset, Chain};
4045 SDNode *New = CurDAG->getMachineNode(ARM::LOADDUAL, dl,
4046 {MVT::Untyped, MVT::Other}, Ops);
4047 SDValue Lo = CurDAG->getTargetExtractSubreg(ARM::gsub_0, dl, MVT::i32,
4048 SDValue(New, 0));
4049 SDValue Hi = CurDAG->getTargetExtractSubreg(ARM::gsub_1, dl, MVT::i32,
4050 SDValue(New, 0));
4051 transferMemOperands(N, New);
4052 ReplaceUses(SDValue(N, 0), Lo);
4053 ReplaceUses(SDValue(N, 1), Hi);
4054 ReplaceUses(SDValue(N, 2), SDValue(New, 1));
4055 CurDAG->RemoveDeadNode(N);
4056 return;
4057 }
4058 case ARMISD::STRD: {
4059 if (Subtarget->isThumb2())
4060 break; // TableGen handles isel in this case.
4061 SDValue Base, RegOffset, ImmOffset;
4062 const SDValue &Chain = N->getOperand(0);
4063 const SDValue &Addr = N->getOperand(3);
4064 SelectAddrMode3(Addr, Base, RegOffset, ImmOffset);
4065 if (RegOffset != CurDAG->getRegister(0, MVT::i32)) {
4066 // The register-offset variant of STRD mandates that the register
4067 // allocated to RegOffset is not reused in any of the remaining operands.
4068 // This restriction is currently not enforced. Therefore emitting this
4069 // variant is explicitly avoided.
4070 Base = Addr;
4071 RegOffset = CurDAG->getRegister(0, MVT::i32);
4072 }
4073 SDNode *RegPair =
4074 createGPRPairNode(MVT::Untyped, N->getOperand(1), N->getOperand(2));
4075 SDValue Ops[] = {SDValue(RegPair, 0), Base, RegOffset, ImmOffset, Chain};
4076 SDNode *New = CurDAG->getMachineNode(ARM::STOREDUAL, dl, MVT::Other, Ops);
4077 transferMemOperands(N, New);
4078 ReplaceUses(SDValue(N, 0), SDValue(New, 0));
4079 CurDAG->RemoveDeadNode(N);
4080 return;
4081 }
4082 case ARMISD::LOOP_DEC: {
4083 SDValue Ops[] = { N->getOperand(1),
4084 N->getOperand(2),
4085 N->getOperand(0) };
4086 SDNode *Dec =
4087 CurDAG->getMachineNode(ARM::t2LoopDec, dl,
4088 CurDAG->getVTList(MVT::i32, MVT::Other), Ops);
4089 ReplaceUses(N, Dec);
4090 CurDAG->RemoveDeadNode(N);
4091 return;
4092 }
4093 case ARMISD::BRCOND: {
4094 // Pattern: (ARMbrcond:void (bb:Other):$dst, (imm:i32):$cc)
4095 // Emits: (Bcc:void (bb:Other):$dst, (imm:i32):$cc)
4096 // Pattern complexity = 6 cost = 1 size = 0
4097
4098 // Pattern: (ARMbrcond:void (bb:Other):$dst, (imm:i32):$cc)
4099 // Emits: (tBcc:void (bb:Other):$dst, (imm:i32):$cc)
4100 // Pattern complexity = 6 cost = 1 size = 0
4101
4102 // Pattern: (ARMbrcond:void (bb:Other):$dst, (imm:i32):$cc)
4103 // Emits: (t2Bcc:void (bb:Other):$dst, (imm:i32):$cc)
4104 // Pattern complexity = 6 cost = 1 size = 0
4105
4106 unsigned Opc = Subtarget->isThumb() ?
4107 ((Subtarget->hasThumb2()) ? ARM::t2Bcc : ARM::tBcc) : ARM::Bcc;
4108 SDValue Chain = N->getOperand(0);
4109 SDValue N1 = N->getOperand(1);
4110 SDValue N2 = N->getOperand(2);
4111 SDValue N3 = N->getOperand(3);
4112 SDValue InFlag = N->getOperand(4);
4113 assert(N1.getOpcode() == ISD::BasicBlock)(static_cast <bool> (N1.getOpcode() == ISD::BasicBlock)
? void (0) : __assert_fail ("N1.getOpcode() == ISD::BasicBlock"
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 4113, __extension__
__PRETTY_FUNCTION__));
4114 assert(N2.getOpcode() == ISD::Constant)(static_cast <bool> (N2.getOpcode() == ISD::Constant) ?
void (0) : __assert_fail ("N2.getOpcode() == ISD::Constant",
"llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 4114, __extension__
__PRETTY_FUNCTION__));
4115 assert(N3.getOpcode() == ISD::Register)(static_cast <bool> (N3.getOpcode() == ISD::Register) ?
void (0) : __assert_fail ("N3.getOpcode() == ISD::Register",
"llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 4115, __extension__
__PRETTY_FUNCTION__));
4116
4117 unsigned CC = (unsigned) cast<ConstantSDNode>(N2)->getZExtValue();
4118
4119 if (InFlag.getOpcode() == ARMISD::CMPZ) {
4120 if (InFlag.getOperand(0).getOpcode() == ISD::INTRINSIC_W_CHAIN) {
4121 SDValue Int = InFlag.getOperand(0);
4122 uint64_t ID = cast<ConstantSDNode>(Int->getOperand(1))->getZExtValue();
4123
4124 // Handle low-overhead loops.
4125 if (ID == Intrinsic::loop_decrement_reg) {
4126 SDValue Elements = Int.getOperand(2);
4127 SDValue Size = CurDAG->getTargetConstant(
4128 cast<ConstantSDNode>(Int.getOperand(3))->getZExtValue(), dl,
4129 MVT::i32);
4130
4131 SDValue Args[] = { Elements, Size, Int.getOperand(0) };
4132 SDNode *LoopDec =
4133 CurDAG->getMachineNode(ARM::t2LoopDec, dl,
4134 CurDAG->getVTList(MVT::i32, MVT::Other),
4135 Args);
4136 ReplaceUses(Int.getNode(), LoopDec);
4137
4138 SDValue EndArgs[] = { SDValue(LoopDec, 0), N1, Chain };
4139 SDNode *LoopEnd =
4140 CurDAG->getMachineNode(ARM::t2LoopEnd, dl, MVT::Other, EndArgs);
4141
4142 ReplaceUses(N, LoopEnd);
4143 CurDAG->RemoveDeadNode(N);
4144 CurDAG->RemoveDeadNode(InFlag.getNode());
4145 CurDAG->RemoveDeadNode(Int.getNode());
4146 return;
4147 }
4148 }
4149
4150 bool SwitchEQNEToPLMI;
4151 SelectCMPZ(InFlag.getNode(), SwitchEQNEToPLMI);
4152 InFlag = N->getOperand(4);
4153
4154 if (SwitchEQNEToPLMI) {
4155 switch ((ARMCC::CondCodes)CC) {
4156 default: llvm_unreachable("CMPZ must be either NE or EQ!")::llvm::llvm_unreachable_internal("CMPZ must be either NE or EQ!"
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 4156);
4157 case ARMCC::NE:
4158 CC = (unsigned)ARMCC::MI;
4159 break;
4160 case ARMCC::EQ:
4161 CC = (unsigned)ARMCC::PL;
4162 break;
4163 }
4164 }
4165 }
4166
4167 SDValue Tmp2 = CurDAG->getTargetConstant(CC, dl, MVT::i32);
4168 SDValue Ops[] = { N1, Tmp2, N3, Chain, InFlag };
4169 SDNode *ResNode = CurDAG->getMachineNode(Opc, dl, MVT::Other,
4170 MVT::Glue, Ops);
4171 Chain = SDValue(ResNode, 0);
4172 if (N->getNumValues() == 2) {
4173 InFlag = SDValue(ResNode, 1);
4174 ReplaceUses(SDValue(N, 1), InFlag);
4175 }
4176 ReplaceUses(SDValue(N, 0),
4177 SDValue(Chain.getNode(), Chain.getResNo()));
4178 CurDAG->RemoveDeadNode(N);
4179 return;
4180 }
4181
4182 case ARMISD::CMPZ: {
4183 // select (CMPZ X, #-C) -> (CMPZ (ADDS X, #C), #0)
4184 // This allows us to avoid materializing the expensive negative constant.
4185 // The CMPZ #0 is useless and will be peepholed away but we need to keep it
4186 // for its glue output.
4187 SDValue X = N->getOperand(0);
4188 auto *C = dyn_cast<ConstantSDNode>(N->getOperand(1).getNode());
4189 if (C && C->getSExtValue() < 0 && Subtarget->isThumb()) {
4190 int64_t Addend = -C->getSExtValue();
4191
4192 SDNode *Add = nullptr;
4193 // ADDS can be better than CMN if the immediate fits in a
4194 // 16-bit ADDS, which means either [0,256) for tADDi8 or [0,8) for tADDi3.
4195 // Outside that range we can just use a CMN which is 32-bit but has a
4196 // 12-bit immediate range.
4197 if (Addend < 1<<8) {
4198 if (Subtarget->isThumb2()) {
4199 SDValue Ops[] = { X, CurDAG->getTargetConstant(Addend, dl, MVT::i32),
4200 getAL(CurDAG, dl), CurDAG->getRegister(0, MVT::i32),
4201 CurDAG->getRegister(0, MVT::i32) };
4202 Add = CurDAG->getMachineNode(ARM::t2ADDri, dl, MVT::i32, Ops);
4203 } else {
4204 unsigned Opc = (Addend < 1<<3) ? ARM::tADDi3 : ARM::tADDi8;
4205 SDValue Ops[] = {CurDAG->getRegister(ARM::CPSR, MVT::i32), X,
4206 CurDAG->getTargetConstant(Addend, dl, MVT::i32),
4207 getAL(CurDAG, dl), CurDAG->getRegister(0, MVT::i32)};
4208 Add = CurDAG->getMachineNode(Opc, dl, MVT::i32, Ops);
4209 }
4210 }
4211 if (Add) {
4212 SDValue Ops2[] = {SDValue(Add, 0), CurDAG->getConstant(0, dl, MVT::i32)};
4213 CurDAG->MorphNodeTo(N, ARMISD::CMPZ, CurDAG->getVTList(MVT::Glue), Ops2);
4214 }
4215 }
4216 // Other cases are autogenerated.
4217 break;
4218 }
4219
4220 case ARMISD::CMOV: {
4221 SDValue InFlag = N->getOperand(4);
4222
4223 if (InFlag.getOpcode() == ARMISD::CMPZ) {
4224 bool SwitchEQNEToPLMI;
4225 SelectCMPZ(InFlag.getNode(), SwitchEQNEToPLMI);
4226
4227 if (SwitchEQNEToPLMI) {
4228 SDValue ARMcc = N->getOperand(2);
4229 ARMCC::CondCodes CC =
4230 (ARMCC::CondCodes)cast<ConstantSDNode>(ARMcc)->getZExtValue();
4231
4232 switch (CC) {
4233 default: llvm_unreachable("CMPZ must be either NE or EQ!")::llvm::llvm_unreachable_internal("CMPZ must be either NE or EQ!"
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 4233);
4234 case ARMCC::NE:
4235 CC = ARMCC::MI;
4236 break;
4237 case ARMCC::EQ:
4238 CC = ARMCC::PL;
4239 break;
4240 }
4241 SDValue NewARMcc = CurDAG->getConstant((unsigned)CC, dl, MVT::i32);
4242 SDValue Ops[] = {N->getOperand(0), N->getOperand(1), NewARMcc,
4243 N->getOperand(3), N->getOperand(4)};
4244 CurDAG->MorphNodeTo(N, ARMISD::CMOV, N->getVTList(), Ops);
4245 }
4246
4247 }
4248 // Other cases are autogenerated.
4249 break;
4250 }
4251
4252 case ARMISD::VZIP: {
4253 unsigned Opc = 0;
4254 EVT VT = N->getValueType(0);
4255 switch (VT.getSimpleVT().SimpleTy) {
4256 default: return;
4257 case MVT::v8i8: Opc = ARM::VZIPd8; break;
4258 case MVT::v4f16:
4259 case MVT::v4i16: Opc = ARM::VZIPd16; break;
4260 case MVT::v2f32:
4261 // vzip.32 Dd, Dm is a pseudo-instruction expanded to vtrn.32 Dd, Dm.
4262 case MVT::v2i32: Opc = ARM::VTRNd32; break;
4263 case MVT::v16i8: Opc = ARM::VZIPq8; break;
4264 case MVT::v8f16:
4265 case MVT::v8i16: Opc = ARM::VZIPq16; break;
4266 case MVT::v4f32:
4267 case MVT::v4i32: Opc = ARM::VZIPq32; break;
4268 }
4269 SDValue Pred = getAL(CurDAG, dl);
4270 SDValue PredReg = CurDAG->getRegister(0, MVT::i32);
4271 SDValue Ops[] = { N->getOperand(0), N->getOperand(1), Pred, PredReg };
4272 ReplaceNode(N, CurDAG->getMachineNode(Opc, dl, VT, VT, Ops));
4273 return;
4274 }
4275 case ARMISD::VUZP: {
4276 unsigned Opc = 0;
4277 EVT VT = N->getValueType(0);
4278 switch (VT.getSimpleVT().SimpleTy) {
4279 default: return;
4280 case MVT::v8i8: Opc = ARM::VUZPd8; break;
4281 case MVT::v4f16:
4282 case MVT::v4i16: Opc = ARM::VUZPd16; break;
4283 case MVT::v2f32:
4284 // vuzp.32 Dd, Dm is a pseudo-instruction expanded to vtrn.32 Dd, Dm.
4285 case MVT::v2i32: Opc = ARM::VTRNd32; break;
4286 case MVT::v16i8: Opc = ARM::VUZPq8; break;
4287 case MVT::v8f16:
4288 case MVT::v8i16: Opc = ARM::VUZPq16; break;
4289 case MVT::v4f32:
4290 case MVT::v4i32: Opc = ARM::VUZPq32; break;
4291 }
4292 SDValue Pred = getAL(CurDAG, dl);
4293 SDValue PredReg = CurDAG->getRegister(0, MVT::i32);
4294 SDValue Ops[] = { N->getOperand(0), N->getOperand(1), Pred, PredReg };
4295 ReplaceNode(N, CurDAG->getMachineNode(Opc, dl, VT, VT, Ops));
4296 return;
4297 }
4298 case ARMISD::VTRN: {
4299 unsigned Opc = 0;
4300 EVT VT = N->getValueType(0);
4301 switch (VT.getSimpleVT().SimpleTy) {
4302 default: return;
4303 case MVT::v8i8: Opc = ARM::VTRNd8; break;
4304 case MVT::v4f16:
4305 case MVT::v4i16: Opc = ARM::VTRNd16; break;
4306 case MVT::v2f32:
4307 case MVT::v2i32: Opc = ARM::VTRNd32; break;
4308 case MVT::v16i8: Opc = ARM::VTRNq8; break;
4309 case MVT::v8f16:
4310 case MVT::v8i16: Opc = ARM::VTRNq16; break;
4311 case MVT::v4f32:
4312 case MVT::v4i32: Opc = ARM::VTRNq32; break;
4313 }
4314 SDValue Pred = getAL(CurDAG, dl);
4315 SDValue PredReg = CurDAG->getRegister(0, MVT::i32);
4316 SDValue Ops[] = { N->getOperand(0), N->getOperand(1), Pred, PredReg };
4317 ReplaceNode(N, CurDAG->getMachineNode(Opc, dl, VT, VT, Ops));
4318 return;
4319 }
4320 case ARMISD::BUILD_VECTOR: {
4321 EVT VecVT = N->getValueType(0);
4322 EVT EltVT = VecVT.getVectorElementType();
4323 unsigned NumElts = VecVT.getVectorNumElements();
4324 if (EltVT == MVT::f64) {
4325 assert(NumElts == 2 && "unexpected type for BUILD_VECTOR")(static_cast <bool> (NumElts == 2 && "unexpected type for BUILD_VECTOR"
) ? void (0) : __assert_fail ("NumElts == 2 && \"unexpected type for BUILD_VECTOR\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 4325, __extension__
__PRETTY_FUNCTION__));
4326 ReplaceNode(
4327 N, createDRegPairNode(VecVT, N->getOperand(0), N->getOperand(1)));
4328 return;
4329 }
4330 assert(EltVT == MVT::f32 && "unexpected type for BUILD_VECTOR")(static_cast <bool> (EltVT == MVT::f32 && "unexpected type for BUILD_VECTOR"
) ? void (0) : __assert_fail ("EltVT == MVT::f32 && \"unexpected type for BUILD_VECTOR\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 4330, __extension__
__PRETTY_FUNCTION__));
4331 if (NumElts == 2) {
4332 ReplaceNode(
4333 N, createSRegPairNode(VecVT, N->getOperand(0), N->getOperand(1)));
4334 return;
4335 }
4336 assert(NumElts == 4 && "unexpected type for BUILD_VECTOR")(static_cast <bool> (NumElts == 4 && "unexpected type for BUILD_VECTOR"
) ? void (0) : __assert_fail ("NumElts == 4 && \"unexpected type for BUILD_VECTOR\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 4336, __extension__
__PRETTY_FUNCTION__));
4337 ReplaceNode(N,
4338 createQuadSRegsNode(VecVT, N->getOperand(0), N->getOperand(1),
4339 N->getOperand(2), N->getOperand(3)));
4340 return;
4341 }
4342
4343 case ARMISD::VLD1DUP: {
4344 static const uint16_t DOpcodes[] = { ARM::VLD1DUPd8, ARM::VLD1DUPd16,
4345 ARM::VLD1DUPd32 };
4346 static const uint16_t QOpcodes[] = { ARM::VLD1DUPq8, ARM::VLD1DUPq16,
4347 ARM::VLD1DUPq32 };
4348 SelectVLDDup(N, /* IsIntrinsic= */ false, false, 1, DOpcodes, QOpcodes);
4349 return;
4350 }
4351
4352 case ARMISD::VLD2DUP: {
4353 static const uint16_t Opcodes[] = { ARM::VLD2DUPd8, ARM::VLD2DUPd16,
4354 ARM::VLD2DUPd32 };
4355 SelectVLDDup(N, /* IsIntrinsic= */ false, false, 2, Opcodes);
4356 return;
4357 }
4358
4359 case ARMISD::VLD3DUP: {
4360 static const uint16_t Opcodes[] = { ARM::VLD3DUPd8Pseudo,
4361 ARM::VLD3DUPd16Pseudo,
4362 ARM::VLD3DUPd32Pseudo };
4363 SelectVLDDup(N, /* IsIntrinsic= */ false, false, 3, Opcodes);
4364 return;
4365 }
4366
4367 case ARMISD::VLD4DUP: {
4368 static const uint16_t Opcodes[] = { ARM::VLD4DUPd8Pseudo,
4369 ARM::VLD4DUPd16Pseudo,
4370 ARM::VLD4DUPd32Pseudo };
4371 SelectVLDDup(N, /* IsIntrinsic= */ false, false, 4, Opcodes);
4372 return;
4373 }
4374
4375 case ARMISD::VLD1DUP_UPD: {
4376 static const uint16_t DOpcodes[] = { ARM::VLD1DUPd8wb_fixed,
4377 ARM::VLD1DUPd16wb_fixed,
4378 ARM::VLD1DUPd32wb_fixed };
4379 static const uint16_t QOpcodes[] = { ARM::VLD1DUPq8wb_fixed,
4380 ARM::VLD1DUPq16wb_fixed,
4381 ARM::VLD1DUPq32wb_fixed };
4382 SelectVLDDup(N, /* IsIntrinsic= */ false, true, 1, DOpcodes, QOpcodes);
4383 return;
4384 }
4385
4386 case ARMISD::VLD2DUP_UPD: {
4387 static const uint16_t DOpcodes[] = { ARM::VLD2DUPd8wb_fixed,
4388 ARM::VLD2DUPd16wb_fixed,
4389 ARM::VLD2DUPd32wb_fixed,
4390 ARM::VLD1q64wb_fixed };
4391 static const uint16_t QOpcodes0[] = { ARM::VLD2DUPq8EvenPseudo,
4392 ARM::VLD2DUPq16EvenPseudo,
4393 ARM::VLD2DUPq32EvenPseudo };
4394 static const uint16_t QOpcodes1[] = { ARM::VLD2DUPq8OddPseudoWB_fixed,
4395 ARM::VLD2DUPq16OddPseudoWB_fixed,
4396 ARM::VLD2DUPq32OddPseudoWB_fixed };
4397 SelectVLDDup(N, /* IsIntrinsic= */ false, true, 2, DOpcodes, QOpcodes0, QOpcodes1);
4398 return;
4399 }
4400
4401 case ARMISD::VLD3DUP_UPD: {
4402 static const uint16_t DOpcodes[] = { ARM::VLD3DUPd8Pseudo_UPD,
4403 ARM::VLD3DUPd16Pseudo_UPD,
4404 ARM::VLD3DUPd32Pseudo_UPD,
4405 ARM::VLD1d64TPseudoWB_fixed };
4406 static const uint16_t QOpcodes0[] = { ARM::VLD3DUPq8EvenPseudo,
4407 ARM::VLD3DUPq16EvenPseudo,
4408 ARM::VLD3DUPq32EvenPseudo };
4409 static const uint16_t QOpcodes1[] = { ARM::VLD3DUPq8OddPseudo_UPD,
4410 ARM::VLD3DUPq16OddPseudo_UPD,
4411 ARM::VLD3DUPq32OddPseudo_UPD };
4412 SelectVLDDup(N, /* IsIntrinsic= */ false, true, 3, DOpcodes, QOpcodes0, QOpcodes1);
4413 return;
4414 }
4415
4416 case ARMISD::VLD4DUP_UPD: {
4417 static const uint16_t DOpcodes[] = { ARM::VLD4DUPd8Pseudo_UPD,
4418 ARM::VLD4DUPd16Pseudo_UPD,
4419 ARM::VLD4DUPd32Pseudo_UPD,
4420 ARM::VLD1d64QPseudoWB_fixed };
4421 static const uint16_t QOpcodes0[] = { ARM::VLD4DUPq8EvenPseudo,
4422 ARM::VLD4DUPq16EvenPseudo,
4423 ARM::VLD4DUPq32EvenPseudo };
4424 static const uint16_t QOpcodes1[] = { ARM::VLD4DUPq8OddPseudo_UPD,
4425 ARM::VLD4DUPq16OddPseudo_UPD,
4426 ARM::VLD4DUPq32OddPseudo_UPD };
4427 SelectVLDDup(N, /* IsIntrinsic= */ false, true, 4, DOpcodes, QOpcodes0, QOpcodes1);
4428 return;
4429 }
4430
4431 case ARMISD::VLD1_UPD: {
4432 static const uint16_t DOpcodes[] = { ARM::VLD1d8wb_fixed,
4433 ARM::VLD1d16wb_fixed,
4434 ARM::VLD1d32wb_fixed,
4435 ARM::VLD1d64wb_fixed };
4436 static const uint16_t QOpcodes[] = { ARM::VLD1q8wb_fixed,
4437 ARM::VLD1q16wb_fixed,
4438 ARM::VLD1q32wb_fixed,
4439 ARM::VLD1q64wb_fixed };
4440 SelectVLD(N, true, 1, DOpcodes, QOpcodes, nullptr);
4441 return;
4442 }
4443
4444 case ARMISD::VLD2_UPD: {
4445 if (Subtarget->hasNEON()) {
4446 static const uint16_t DOpcodes[] = {
4447 ARM::VLD2d8wb_fixed, ARM::VLD2d16wb_fixed, ARM::VLD2d32wb_fixed,
4448 ARM::VLD1q64wb_fixed};
4449 static const uint16_t QOpcodes[] = {ARM::VLD2q8PseudoWB_fixed,
4450 ARM::VLD2q16PseudoWB_fixed,
4451 ARM::VLD2q32PseudoWB_fixed};
4452 SelectVLD(N, true, 2, DOpcodes, QOpcodes, nullptr);
4453 } else {
4454 static const uint16_t Opcodes8[] = {ARM::MVE_VLD20_8,
4455 ARM::MVE_VLD21_8_wb};
4456 static const uint16_t Opcodes16[] = {ARM::MVE_VLD20_16,
4457 ARM::MVE_VLD21_16_wb};
4458 static const uint16_t Opcodes32[] = {ARM::MVE_VLD20_32,
4459 ARM::MVE_VLD21_32_wb};
4460 static const uint16_t *const Opcodes[] = {Opcodes8, Opcodes16, Opcodes32};
4461 SelectMVE_VLD(N, 2, Opcodes, true);
4462 }
4463 return;
4464 }
4465
4466 case ARMISD::VLD3_UPD: {
4467 static const uint16_t DOpcodes[] = { ARM::VLD3d8Pseudo_UPD,
4468 ARM::VLD3d16Pseudo_UPD,
4469 ARM::VLD3d32Pseudo_UPD,
4470 ARM::VLD1d64TPseudoWB_fixed};
4471 static const uint16_t QOpcodes0[] = { ARM::VLD3q8Pseudo_UPD,
4472 ARM::VLD3q16Pseudo_UPD,
4473 ARM::VLD3q32Pseudo_UPD };
4474 static const uint16_t QOpcodes1[] = { ARM::VLD3q8oddPseudo_UPD,
4475 ARM::VLD3q16oddPseudo_UPD,
4476 ARM::VLD3q32oddPseudo_UPD };
4477 SelectVLD(N, true, 3, DOpcodes, QOpcodes0, QOpcodes1);
4478 return;
4479 }
4480
4481 case ARMISD::VLD4_UPD: {
4482 if (Subtarget->hasNEON()) {
4483 static const uint16_t DOpcodes[] = {
4484 ARM::VLD4d8Pseudo_UPD, ARM::VLD4d16Pseudo_UPD, ARM::VLD4d32Pseudo_UPD,
4485 ARM::VLD1d64QPseudoWB_fixed};
4486 static const uint16_t QOpcodes0[] = {ARM::VLD4q8Pseudo_UPD,
4487 ARM::VLD4q16Pseudo_UPD,
4488 ARM::VLD4q32Pseudo_UPD};
4489 static const uint16_t QOpcodes1[] = {ARM::VLD4q8oddPseudo_UPD,
4490 ARM::VLD4q16oddPseudo_UPD,
4491 ARM::VLD4q32oddPseudo_UPD};
4492 SelectVLD(N, true, 4, DOpcodes, QOpcodes0, QOpcodes1);
4493 } else {
4494 static const uint16_t Opcodes8[] = {ARM::MVE_VLD40_8, ARM::MVE_VLD41_8,
4495 ARM::MVE_VLD42_8,
4496 ARM::MVE_VLD43_8_wb};
4497 static const uint16_t Opcodes16[] = {ARM::MVE_VLD40_16, ARM::MVE_VLD41_16,
4498 ARM::MVE_VLD42_16,
4499 ARM::MVE_VLD43_16_wb};
4500 static const uint16_t Opcodes32[] = {ARM::MVE_VLD40_32, ARM::MVE_VLD41_32,
4501 ARM::MVE_VLD42_32,
4502 ARM::MVE_VLD43_32_wb};
4503 static const uint16_t *const Opcodes[] = {Opcodes8, Opcodes16, Opcodes32};
4504 SelectMVE_VLD(N, 4, Opcodes, true);
4505 }
4506 return;
4507 }
4508
4509 case ARMISD::VLD1x2_UPD: {
4510 if (Subtarget->hasNEON()) {
4511 static const uint16_t DOpcodes[] = {
4512 ARM::VLD1q8wb_fixed, ARM::VLD1q16wb_fixed, ARM::VLD1q32wb_fixed,
4513 ARM::VLD1q64wb_fixed};
4514 static const uint16_t QOpcodes[] = {
4515 ARM::VLD1d8QPseudoWB_fixed, ARM::VLD1d16QPseudoWB_fixed,
4516 ARM::VLD1d32QPseudoWB_fixed, ARM::VLD1d64QPseudoWB_fixed};
4517 SelectVLD(N, true, 2, DOpcodes, QOpcodes, nullptr);
4518 return;
4519 }
4520 break;
4521 }
4522
4523 case ARMISD::VLD1x3_UPD: {
4524 if (Subtarget->hasNEON()) {
4525 static const uint16_t DOpcodes[] = {
4526 ARM::VLD1d8TPseudoWB_fixed, ARM::VLD1d16TPseudoWB_fixed,
4527 ARM::VLD1d32TPseudoWB_fixed, ARM::VLD1d64TPseudoWB_fixed};
4528 static const uint16_t QOpcodes0[] = {
4529 ARM::VLD1q8LowTPseudo_UPD, ARM::VLD1q16LowTPseudo_UPD,
4530 ARM::VLD1q32LowTPseudo_UPD, ARM::VLD1q64LowTPseudo_UPD};
4531 static const uint16_t QOpcodes1[] = {
4532 ARM::VLD1q8HighTPseudo_UPD, ARM::VLD1q16HighTPseudo_UPD,
4533 ARM::VLD1q32HighTPseudo_UPD, ARM::VLD1q64HighTPseudo_UPD};
4534 SelectVLD(N, true, 3, DOpcodes, QOpcodes0, QOpcodes1);
4535 return;
4536 }
4537 break;
4538 }
4539
4540 case ARMISD::VLD1x4_UPD: {
4541 if (Subtarget->hasNEON()) {
4542 static const uint16_t DOpcodes[] = {
4543 ARM::VLD1d8QPseudoWB_fixed, ARM::VLD1d16QPseudoWB_fixed,
4544 ARM::VLD1d32QPseudoWB_fixed, ARM::VLD1d64QPseudoWB_fixed};
4545 static const uint16_t QOpcodes0[] = {
4546 ARM::VLD1q8LowQPseudo_UPD, ARM::VLD1q16LowQPseudo_UPD,
4547 ARM::VLD1q32LowQPseudo_UPD, ARM::VLD1q64LowQPseudo_UPD};
4548 static const uint16_t QOpcodes1[] = {
4549 ARM::VLD1q8HighQPseudo_UPD, ARM::VLD1q16HighQPseudo_UPD,
4550 ARM::VLD1q32HighQPseudo_UPD, ARM::VLD1q64HighQPseudo_UPD};
4551 SelectVLD(N, true, 4, DOpcodes, QOpcodes0, QOpcodes1);
4552 return;
4553 }
4554 break;
4555 }
4556
4557 case ARMISD::VLD2LN_UPD: {
4558 static const uint16_t DOpcodes[] = { ARM::VLD2LNd8Pseudo_UPD,
4559 ARM::VLD2LNd16Pseudo_UPD,
4560 ARM::VLD2LNd32Pseudo_UPD };
4561 static const uint16_t QOpcodes[] = { ARM::VLD2LNq16Pseudo_UPD,
4562 ARM::VLD2LNq32Pseudo_UPD };
4563 SelectVLDSTLane(N, true, true, 2, DOpcodes, QOpcodes);
4564 return;
4565 }
4566
4567 case ARMISD::VLD3LN_UPD: {
4568 static const uint16_t DOpcodes[] = { ARM::VLD3LNd8Pseudo_UPD,
4569 ARM::VLD3LNd16Pseudo_UPD,
4570 ARM::VLD3LNd32Pseudo_UPD };
4571 static const uint16_t QOpcodes[] = { ARM::VLD3LNq16Pseudo_UPD,
4572 ARM::VLD3LNq32Pseudo_UPD };
4573 SelectVLDSTLane(N, true, true, 3, DOpcodes, QOpcodes);
4574 return;
4575 }
4576
4577 case ARMISD::VLD4LN_UPD: {
4578 static const uint16_t DOpcodes[] = { ARM::VLD4LNd8Pseudo_UPD,
4579 ARM::VLD4LNd16Pseudo_UPD,
4580 ARM::VLD4LNd32Pseudo_UPD };
4581 static const uint16_t QOpcodes[] = { ARM::VLD4LNq16Pseudo_UPD,
4582 ARM::VLD4LNq32Pseudo_UPD };
4583 SelectVLDSTLane(N, true, true, 4, DOpcodes, QOpcodes);
4584 return;
4585 }
4586
4587 case ARMISD::VST1_UPD: {
4588 static const uint16_t DOpcodes[] = { ARM::VST1d8wb_fixed,
4589 ARM::VST1d16wb_fixed,
4590 ARM::VST1d32wb_fixed,
4591 ARM::VST1d64wb_fixed };
4592 static const uint16_t QOpcodes[] = { ARM::VST1q8wb_fixed,
4593 ARM::VST1q16wb_fixed,
4594 ARM::VST1q32wb_fixed,
4595 ARM::VST1q64wb_fixed };
4596 SelectVST(N, true, 1, DOpcodes, QOpcodes, nullptr);
4597 return;
4598 }
4599
4600 case ARMISD::VST2_UPD: {
4601 if (Subtarget->hasNEON()) {
4602 static const uint16_t DOpcodes[] = {
4603 ARM::VST2d8wb_fixed, ARM::VST2d16wb_fixed, ARM::VST2d32wb_fixed,
4604 ARM::VST1q64wb_fixed};
4605 static const uint16_t QOpcodes[] = {ARM::VST2q8PseudoWB_fixed,
4606 ARM::VST2q16PseudoWB_fixed,
4607 ARM::VST2q32PseudoWB_fixed};
4608 SelectVST(N, true, 2, DOpcodes, QOpcodes, nullptr);
4609 return;
4610 }
4611 break;
4612 }
4613
4614 case ARMISD::VST3_UPD: {
4615 static const uint16_t DOpcodes[] = { ARM::VST3d8Pseudo_UPD,
4616 ARM::VST3d16Pseudo_UPD,
4617 ARM::VST3d32Pseudo_UPD,
4618 ARM::VST1d64TPseudoWB_fixed};
4619 static const uint16_t QOpcodes0[] = { ARM::VST3q8Pseudo_UPD,
4620 ARM::VST3q16Pseudo_UPD,
4621 ARM::VST3q32Pseudo_UPD };
4622 static const uint16_t QOpcodes1[] = { ARM::VST3q8oddPseudo_UPD,
4623 ARM::VST3q16oddPseudo_UPD,
4624 ARM::VST3q32oddPseudo_UPD };
4625 SelectVST(N, true, 3, DOpcodes, QOpcodes0, QOpcodes1);
4626 return;
4627 }
4628
4629 case ARMISD::VST4_UPD: {
4630 if (Subtarget->hasNEON()) {
4631 static const uint16_t DOpcodes[] = {
4632 ARM::VST4d8Pseudo_UPD, ARM::VST4d16Pseudo_UPD, ARM::VST4d32Pseudo_UPD,
4633 ARM::VST1d64QPseudoWB_fixed};
4634 static const uint16_t QOpcodes0[] = {ARM::VST4q8Pseudo_UPD,
4635 ARM::VST4q16Pseudo_UPD,
4636 ARM::VST4q32Pseudo_UPD};
4637 static const uint16_t QOpcodes1[] = {ARM::VST4q8oddPseudo_UPD,
4638 ARM::VST4q16oddPseudo_UPD,
4639 ARM::VST4q32oddPseudo_UPD};
4640 SelectVST(N, true, 4, DOpcodes, QOpcodes0, QOpcodes1);
4641 return;
4642 }
4643 break;
4644 }
4645
4646 case ARMISD::VST1x2_UPD: {
4647 if (Subtarget->hasNEON()) {
4648 static const uint16_t DOpcodes[] = { ARM::VST1q8wb_fixed,
4649 ARM::VST1q16wb_fixed,
4650 ARM::VST1q32wb_fixed,
4651 ARM::VST1q64wb_fixed};
4652 static const uint16_t QOpcodes[] = { ARM::VST1d8QPseudoWB_fixed,
4653 ARM::VST1d16QPseudoWB_fixed,
4654 ARM::VST1d32QPseudoWB_fixed,
4655 ARM::VST1d64QPseudoWB_fixed };
4656 SelectVST(N, true, 2, DOpcodes, QOpcodes, nullptr);
4657 return;
4658 }
4659 break;
4660 }
4661
4662 case ARMISD::VST1x3_UPD: {
4663 if (Subtarget->hasNEON()) {
4664 static const uint16_t DOpcodes[] = { ARM::VST1d8TPseudoWB_fixed,
4665 ARM::VST1d16TPseudoWB_fixed,
4666 ARM::VST1d32TPseudoWB_fixed,
4667 ARM::VST1d64TPseudoWB_fixed };
4668 static const uint16_t QOpcodes0[] = { ARM::VST1q8LowTPseudo_UPD,
4669 ARM::VST1q16LowTPseudo_UPD,
4670 ARM::VST1q32LowTPseudo_UPD,
4671 ARM::VST1q64LowTPseudo_UPD };
4672 static const uint16_t QOpcodes1[] = { ARM::VST1q8HighTPseudo_UPD,
4673 ARM::VST1q16HighTPseudo_UPD,
4674 ARM::VST1q32HighTPseudo_UPD,
4675 ARM::VST1q64HighTPseudo_UPD };
4676 SelectVST(N, true, 3, DOpcodes, QOpcodes0, QOpcodes1);
4677 return;
4678 }
4679 break;
4680 }
4681
4682 case ARMISD::VST1x4_UPD: {
4683 if (Subtarget->hasNEON()) {
4684 static const uint16_t DOpcodes[] = { ARM::VST1d8QPseudoWB_fixed,
4685 ARM::VST1d16QPseudoWB_fixed,
4686 ARM::VST1d32QPseudoWB_fixed,
4687 ARM::VST1d64QPseudoWB_fixed };
4688 static const uint16_t QOpcodes0[] = { ARM::VST1q8LowQPseudo_UPD,
4689 ARM::VST1q16LowQPseudo_UPD,
4690 ARM::VST1q32LowQPseudo_UPD,
4691 ARM::VST1q64LowQPseudo_UPD };
4692 static const uint16_t QOpcodes1[] = { ARM::VST1q8HighQPseudo_UPD,
4693 ARM::VST1q16HighQPseudo_UPD,
4694 ARM::VST1q32HighQPseudo_UPD,
4695 ARM::VST1q64HighQPseudo_UPD };
4696 SelectVST(N, true, 4, DOpcodes, QOpcodes0, QOpcodes1);
4697 return;
4698 }
4699 break;
4700 }
4701 case ARMISD::VST2LN_UPD: {
4702 static const uint16_t DOpcodes[] = { ARM::VST2LNd8Pseudo_UPD,
4703 ARM::VST2LNd16Pseudo_UPD,
4704 ARM::VST2LNd32Pseudo_UPD };
4705 static const uint16_t QOpcodes[] = { ARM::VST2LNq16Pseudo_UPD,
4706 ARM::VST2LNq32Pseudo_UPD };
4707 SelectVLDSTLane(N, false, true, 2, DOpcodes, QOpcodes);
4708 return;
4709 }
4710
4711 case ARMISD::VST3LN_UPD: {
4712 static const uint16_t DOpcodes[] = { ARM::VST3LNd8Pseudo_UPD,
4713 ARM::VST3LNd16Pseudo_UPD,
4714 ARM::VST3LNd32Pseudo_UPD };
4715 static const uint16_t QOpcodes[] = { ARM::VST3LNq16Pseudo_UPD,
4716 ARM::VST3LNq32Pseudo_UPD };
4717 SelectVLDSTLane(N, false, true, 3, DOpcodes, QOpcodes);
4718 return;
4719 }
4720
4721 case ARMISD::VST4LN_UPD: {
4722 static const uint16_t DOpcodes[] = { ARM::VST4LNd8Pseudo_UPD,
4723 ARM::VST4LNd16Pseudo_UPD,
4724 ARM::VST4LNd32Pseudo_UPD };
4725 static const uint16_t QOpcodes[] = { ARM::VST4LNq16Pseudo_UPD,
4726 ARM::VST4LNq32Pseudo_UPD };
4727 SelectVLDSTLane(N, false, true, 4, DOpcodes, QOpcodes);
4728 return;
4729 }
4730
4731 case ISD::INTRINSIC_VOID:
4732 case ISD::INTRINSIC_W_CHAIN: {
4733 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue();
4734 switch (IntNo) {
4735 default:
4736 break;
4737
4738 case Intrinsic::arm_mrrc:
4739 case Intrinsic::arm_mrrc2: {
4740 SDLoc dl(N);
4741 SDValue Chain = N->getOperand(0);
4742 unsigned Opc;
4743
4744 if (Subtarget->isThumb())
4745 Opc = (IntNo == Intrinsic::arm_mrrc ? ARM::t2MRRC : ARM::t2MRRC2);
4746 else
4747 Opc = (IntNo == Intrinsic::arm_mrrc ? ARM::MRRC : ARM::MRRC2);
4748
4749 SmallVector<SDValue, 5> Ops;
4750 Ops.push_back(getI32Imm(cast<ConstantSDNode>(N->getOperand(2))->getZExtValue(), dl)); /* coproc */
4751 Ops.push_back(getI32Imm(cast<ConstantSDNode>(N->getOperand(3))->getZExtValue(), dl)); /* opc */
4752 Ops.push_back(getI32Imm(cast<ConstantSDNode>(N->getOperand(4))->getZExtValue(), dl)); /* CRm */
4753
4754 // The mrrc2 instruction in ARM doesn't allow predicates, the top 4 bits of the encoded
4755 // instruction will always be '1111' but it is possible in assembly language to specify
4756 // AL as a predicate to mrrc2 but it doesn't make any difference to the encoded instruction.
4757 if (Opc != ARM::MRRC2) {
4758 Ops.push_back(getAL(CurDAG, dl));
4759 Ops.push_back(CurDAG->getRegister(0, MVT::i32));
4760 }
4761
4762 Ops.push_back(Chain);
4763
4764 // Writes to two registers.
4765 const EVT RetType[] = {MVT::i32, MVT::i32, MVT::Other};
4766
4767 ReplaceNode(N, CurDAG->getMachineNode(Opc, dl, RetType, Ops));
4768 return;
4769 }
4770 case Intrinsic::arm_ldaexd:
4771 case Intrinsic::arm_ldrexd: {
4772 SDLoc dl(N);
4773 SDValue Chain = N->getOperand(0);
4774 SDValue MemAddr = N->getOperand(2);
4775 bool isThumb = Subtarget->isThumb() && Subtarget->hasV8MBaselineOps();
4776
4777 bool IsAcquire = IntNo == Intrinsic::arm_ldaexd;
4778 unsigned NewOpc = isThumb ? (IsAcquire ? ARM::t2LDAEXD : ARM::t2LDREXD)
4779 : (IsAcquire ? ARM::LDAEXD : ARM::LDREXD);
4780
4781 // arm_ldrexd returns a i64 value in {i32, i32}
4782 std::vector<EVT> ResTys;
4783 if (isThumb) {
4784 ResTys.push_back(MVT::i32);
4785 ResTys.push_back(MVT::i32);
4786 } else
4787 ResTys.push_back(MVT::Untyped);
4788 ResTys.push_back(MVT::Other);
4789
4790 // Place arguments in the right order.
4791 SDValue Ops[] = {MemAddr, getAL(CurDAG, dl),
4792 CurDAG->getRegister(0, MVT::i32), Chain};
4793 SDNode *Ld = CurDAG->getMachineNode(NewOpc, dl, ResTys, Ops);
4794 // Transfer memoperands.
4795 MachineMemOperand *MemOp = cast<MemIntrinsicSDNode>(N)->getMemOperand();
4796 CurDAG->setNodeMemRefs(cast<MachineSDNode>(Ld), {MemOp});
4797
4798 // Remap uses.
4799 SDValue OutChain = isThumb ? SDValue(Ld, 2) : SDValue(Ld, 1);
4800 if (!SDValue(N, 0).use_empty()) {
4801 SDValue Result;
4802 if (isThumb)
4803 Result = SDValue(Ld, 0);
4804 else {
4805 SDValue SubRegIdx =
4806 CurDAG->getTargetConstant(ARM::gsub_0, dl, MVT::i32);
4807 SDNode *ResNode = CurDAG->getMachineNode(TargetOpcode::EXTRACT_SUBREG,
4808 dl, MVT::i32, SDValue(Ld, 0), SubRegIdx);
4809 Result = SDValue(ResNode,0);
4810 }
4811 ReplaceUses(SDValue(N, 0), Result);
4812 }
4813 if (!SDValue(N, 1).use_empty()) {
4814 SDValue Result;
4815 if (isThumb)
4816 Result = SDValue(Ld, 1);
4817 else {
4818 SDValue SubRegIdx =
4819 CurDAG->getTargetConstant(ARM::gsub_1, dl, MVT::i32);
4820 SDNode *ResNode = CurDAG->getMachineNode(TargetOpcode::EXTRACT_SUBREG,
4821 dl, MVT::i32, SDValue(Ld, 0), SubRegIdx);
4822 Result = SDValue(ResNode,0);
4823 }
4824 ReplaceUses(SDValue(N, 1), Result);
4825 }
4826 ReplaceUses(SDValue(N, 2), OutChain);
4827 CurDAG->RemoveDeadNode(N);
4828 return;
4829 }
4830 case Intrinsic::arm_stlexd:
4831 case Intrinsic::arm_strexd: {
4832 SDLoc dl(N);
4833 SDValue Chain = N->getOperand(0);
4834 SDValue Val0 = N->getOperand(2);
4835 SDValue Val1 = N->getOperand(3);
4836 SDValue MemAddr = N->getOperand(4);
4837
4838 // Store exclusive double return a i32 value which is the return status
4839 // of the issued store.
4840 const EVT ResTys[] = {MVT::i32, MVT::Other};
4841
4842 bool isThumb = Subtarget->isThumb() && Subtarget->hasThumb2();
4843 // Place arguments in the right order.
4844 SmallVector<SDValue, 7> Ops;
4845 if (isThumb) {
4846 Ops.push_back(Val0);
4847 Ops.push_back(Val1);
4848 } else
4849 // arm_strexd uses GPRPair.
4850 Ops.push_back(SDValue(createGPRPairNode(MVT::Untyped, Val0, Val1), 0));
4851 Ops.push_back(MemAddr);
4852 Ops.push_back(getAL(CurDAG, dl));
4853 Ops.push_back(CurDAG->getRegister(0, MVT::i32));
4854 Ops.push_back(Chain);
4855
4856 bool IsRelease = IntNo == Intrinsic::arm_stlexd;
4857 unsigned NewOpc = isThumb ? (IsRelease ? ARM::t2STLEXD : ARM::t2STREXD)
4858 : (IsRelease ? ARM::STLEXD : ARM::STREXD);
4859
4860 SDNode *St = CurDAG->getMachineNode(NewOpc, dl, ResTys, Ops);
4861 // Transfer memoperands.
4862 MachineMemOperand *MemOp = cast<MemIntrinsicSDNode>(N)->getMemOperand();
4863 CurDAG->setNodeMemRefs(cast<MachineSDNode>(St), {MemOp});
4864
4865 ReplaceNode(N, St);
4866 return;
4867 }
4868
4869 case Intrinsic::arm_neon_vld1: {
4870 static const uint16_t DOpcodes[] = { ARM::VLD1d8, ARM::VLD1d16,
4871 ARM::VLD1d32, ARM::VLD1d64 };
4872 static const uint16_t QOpcodes[] = { ARM::VLD1q8, ARM::VLD1q16,
4873 ARM::VLD1q32, ARM::VLD1q64};
4874 SelectVLD(N, false, 1, DOpcodes, QOpcodes, nullptr);
4875 return;
4876 }
4877
4878 case Intrinsic::arm_neon_vld1x2: {
4879 static const uint16_t DOpcodes[] = { ARM::VLD1q8, ARM::VLD1q16,
4880 ARM::VLD1q32, ARM::VLD1q64 };
4881 static const uint16_t QOpcodes[] = { ARM::VLD1d8QPseudo,
4882 ARM::VLD1d16QPseudo,
4883 ARM::VLD1d32QPseudo,
4884 ARM::VLD1d64QPseudo };
4885 SelectVLD(N, false, 2, DOpcodes, QOpcodes, nullptr);
4886 return;
4887 }
4888
4889 case Intrinsic::arm_neon_vld1x3: {
4890 static const uint16_t DOpcodes[] = { ARM::VLD1d8TPseudo,
4891 ARM::VLD1d16TPseudo,
4892 ARM::VLD1d32TPseudo,
4893 ARM::VLD1d64TPseudo };
4894 static const uint16_t QOpcodes0[] = { ARM::VLD1q8LowTPseudo_UPD,
4895 ARM::VLD1q16LowTPseudo_UPD,
4896 ARM::VLD1q32LowTPseudo_UPD,
4897 ARM::VLD1q64LowTPseudo_UPD };
4898 static const uint16_t QOpcodes1[] = { ARM::VLD1q8HighTPseudo,
4899 ARM::VLD1q16HighTPseudo,
4900 ARM::VLD1q32HighTPseudo,
4901 ARM::VLD1q64HighTPseudo };
4902 SelectVLD(N, false, 3, DOpcodes, QOpcodes0, QOpcodes1);
4903 return;
4904 }
4905
4906 case Intrinsic::arm_neon_vld1x4: {
4907 static const uint16_t DOpcodes[] = { ARM::VLD1d8QPseudo,
4908 ARM::VLD1d16QPseudo,
4909 ARM::VLD1d32QPseudo,
4910 ARM::VLD1d64QPseudo };
4911 static const uint16_t QOpcodes0[] = { ARM::VLD1q8LowQPseudo_UPD,
4912 ARM::VLD1q16LowQPseudo_UPD,
4913 ARM::VLD1q32LowQPseudo_UPD,
4914 ARM::VLD1q64LowQPseudo_UPD };
4915 static const uint16_t QOpcodes1[] = { ARM::VLD1q8HighQPseudo,
4916 ARM::VLD1q16HighQPseudo,
4917 ARM::VLD1q32HighQPseudo,
4918 ARM::VLD1q64HighQPseudo };
4919 SelectVLD(N, false, 4, DOpcodes, QOpcodes0, QOpcodes1);
4920 return;
4921 }
4922
4923 case Intrinsic::arm_neon_vld2: {
4924 static const uint16_t DOpcodes[] = { ARM::VLD2d8, ARM::VLD2d16,
4925 ARM::VLD2d32, ARM::VLD1q64 };
4926 static const uint16_t QOpcodes[] = { ARM::VLD2q8Pseudo, ARM::VLD2q16Pseudo,
4927 ARM::VLD2q32Pseudo };
4928 SelectVLD(N, false, 2, DOpcodes, QOpcodes, nullptr);
4929 return;
4930 }
4931
4932 case Intrinsic::arm_neon_vld3: {
4933 static const uint16_t DOpcodes[] = { ARM::VLD3d8Pseudo,
4934 ARM::VLD3d16Pseudo,
4935 ARM::VLD3d32Pseudo,
4936 ARM::VLD1d64TPseudo };
4937 static const uint16_t QOpcodes0[] = { ARM::VLD3q8Pseudo_UPD,
4938 ARM::VLD3q16Pseudo_UPD,
4939 ARM::VLD3q32Pseudo_UPD };
4940 static const uint16_t QOpcodes1[] = { ARM::VLD3q8oddPseudo,
4941 ARM::VLD3q16oddPseudo,
4942 ARM::VLD3q32oddPseudo };
4943 SelectVLD(N, false, 3, DOpcodes, QOpcodes0, QOpcodes1);
4944 return;
4945 }
4946
4947 case Intrinsic::arm_neon_vld4: {
4948 static const uint16_t DOpcodes[] = { ARM::VLD4d8Pseudo,
4949 ARM::VLD4d16Pseudo,
4950 ARM::VLD4d32Pseudo,
4951 ARM::VLD1d64QPseudo };
4952 static const uint16_t QOpcodes0[] = { ARM::VLD4q8Pseudo_UPD,
4953 ARM::VLD4q16Pseudo_UPD,
4954 ARM::VLD4q32Pseudo_UPD };
4955 static const uint16_t QOpcodes1[] = { ARM::VLD4q8oddPseudo,
4956 ARM::VLD4q16oddPseudo,
4957 ARM::VLD4q32oddPseudo };
4958 SelectVLD(N, false, 4, DOpcodes, QOpcodes0, QOpcodes1);
4959 return;
4960 }
4961
4962 case Intrinsic::arm_neon_vld2dup: {
4963 static const uint16_t DOpcodes[] = { ARM::VLD2DUPd8, ARM::VLD2DUPd16,
4964 ARM::VLD2DUPd32, ARM::VLD1q64 };
4965 static const uint16_t QOpcodes0[] = { ARM::VLD2DUPq8EvenPseudo,
4966 ARM::VLD2DUPq16EvenPseudo,
4967 ARM::VLD2DUPq32EvenPseudo };
4968 static const uint16_t QOpcodes1[] = { ARM::VLD2DUPq8OddPseudo,
4969 ARM::VLD2DUPq16OddPseudo,
4970 ARM::VLD2DUPq32OddPseudo };
4971 SelectVLDDup(N, /* IsIntrinsic= */ true, false, 2,
4972 DOpcodes, QOpcodes0, QOpcodes1);
4973 return;
4974 }
4975
4976 case Intrinsic::arm_neon_vld3dup: {
4977 static const uint16_t DOpcodes[] = { ARM::VLD3DUPd8Pseudo,
4978 ARM::VLD3DUPd16Pseudo,
4979 ARM::VLD3DUPd32Pseudo,
4980 ARM::VLD1d64TPseudo };
4981 static const uint16_t QOpcodes0[] = { ARM::VLD3DUPq8EvenPseudo,
4982 ARM::VLD3DUPq16EvenPseudo,
4983 ARM::VLD3DUPq32EvenPseudo };
4984 static const uint16_t QOpcodes1[] = { ARM::VLD3DUPq8OddPseudo,
4985 ARM::VLD3DUPq16OddPseudo,
4986 ARM::VLD3DUPq32OddPseudo };
4987 SelectVLDDup(N, /* IsIntrinsic= */ true, false, 3,
4988 DOpcodes, QOpcodes0, QOpcodes1);
4989 return;
4990 }
4991
4992 case Intrinsic::arm_neon_vld4dup: {
4993 static const uint16_t DOpcodes[] = { ARM::VLD4DUPd8Pseudo,
4994 ARM::VLD4DUPd16Pseudo,
4995 ARM::VLD4DUPd32Pseudo,
4996 ARM::VLD1d64QPseudo };
4997 static const uint16_t QOpcodes0[] = { ARM::VLD4DUPq8EvenPseudo,
4998 ARM::VLD4DUPq16EvenPseudo,
4999 ARM::VLD4DUPq32EvenPseudo };
5000 static const uint16_t QOpcodes1[] = { ARM::VLD4DUPq8OddPseudo,
5001 ARM::VLD4DUPq16OddPseudo,
5002 ARM::VLD4DUPq32OddPseudo };
5003 SelectVLDDup(N, /* IsIntrinsic= */ true, false, 4,
5004 DOpcodes, QOpcodes0, QOpcodes1);
5005 return;
5006 }
5007
5008 case Intrinsic::arm_neon_vld2lane: {
5009 static const uint16_t DOpcodes[] = { ARM::VLD2LNd8Pseudo,
5010 ARM::VLD2LNd16Pseudo,
5011 ARM::VLD2LNd32Pseudo };
5012 static const uint16_t QOpcodes[] = { ARM::VLD2LNq16Pseudo,
5013 ARM::VLD2LNq32Pseudo };
5014 SelectVLDSTLane(N, true, false, 2, DOpcodes, QOpcodes);
5015 return;
5016 }
5017
5018 case Intrinsic::arm_neon_vld3lane: {
5019 static const uint16_t DOpcodes[] = { ARM::VLD3LNd8Pseudo,
5020 ARM::VLD3LNd16Pseudo,
5021 ARM::VLD3LNd32Pseudo };
5022 static const uint16_t QOpcodes[] = { ARM::VLD3LNq16Pseudo,
5023 ARM::VLD3LNq32Pseudo };
5024 SelectVLDSTLane(N, true, false, 3, DOpcodes, QOpcodes);
5025 return;
5026 }
5027
5028 case Intrinsic::arm_neon_vld4lane: {
5029 static const uint16_t DOpcodes[] = { ARM::VLD4LNd8Pseudo,
5030 ARM::VLD4LNd16Pseudo,
5031 ARM::VLD4LNd32Pseudo };
5032 static const uint16_t QOpcodes[] = { ARM::VLD4LNq16Pseudo,
5033 ARM::VLD4LNq32Pseudo };
5034 SelectVLDSTLane(N, true, false, 4, DOpcodes, QOpcodes);
5035 return;
5036 }
5037
5038 case Intrinsic::arm_neon_vst1: {
5039 static const uint16_t DOpcodes[] = { ARM::VST1d8, ARM::VST1d16,
5040 ARM::VST1d32, ARM::VST1d64 };
5041 static const uint16_t QOpcodes[] = { ARM::VST1q8, ARM::VST1q16,
5042 ARM::VST1q32, ARM::VST1q64 };
5043 SelectVST(N, false, 1, DOpcodes, QOpcodes, nullptr);
5044 return;
5045 }
5046
5047 case Intrinsic::arm_neon_vst1x2: {
5048 static const uint16_t DOpcodes[] = { ARM::VST1q8, ARM::VST1q16,
5049 ARM::VST1q32, ARM::VST1q64 };
5050 static const uint16_t QOpcodes[] = { ARM::VST1d8QPseudo,
5051 ARM::VST1d16QPseudo,
5052 ARM::VST1d32QPseudo,
5053 ARM::VST1d64QPseudo };
5054 SelectVST(N, false, 2, DOpcodes, QOpcodes, nullptr);
5055 return;
5056 }
5057
5058 case Intrinsic::arm_neon_vst1x3: {
5059 static const uint16_t DOpcodes[] = { ARM::VST1d8TPseudo,
5060 ARM::VST1d16TPseudo,
5061 ARM::VST1d32TPseudo,
5062 ARM::VST1d64TPseudo };
5063 static const uint16_t QOpcodes0[] = { ARM::VST1q8LowTPseudo_UPD,
5064 ARM::VST1q16LowTPseudo_UPD,
5065 ARM::VST1q32LowTPseudo_UPD,
5066 ARM::VST1q64LowTPseudo_UPD };
5067 static const uint16_t QOpcodes1[] = { ARM::VST1q8HighTPseudo,
5068 ARM::VST1q16HighTPseudo,
5069 ARM::VST1q32HighTPseudo,
5070 ARM::VST1q64HighTPseudo };
5071 SelectVST(N, false, 3, DOpcodes, QOpcodes0, QOpcodes1);
5072 return;
5073 }
5074
5075 case Intrinsic::arm_neon_vst1x4: {
5076 static const uint16_t DOpcodes[] = { ARM::VST1d8QPseudo,
5077 ARM::VST1d16QPseudo,
5078 ARM::VST1d32QPseudo,
5079 ARM::VST1d64QPseudo };
5080 static const uint16_t QOpcodes0[] = { ARM::VST1q8LowQPseudo_UPD,
5081 ARM::VST1q16LowQPseudo_UPD,
5082 ARM::VST1q32LowQPseudo_UPD,
5083 ARM::VST1q64LowQPseudo_UPD };
5084 static const uint16_t QOpcodes1[] = { ARM::VST1q8HighQPseudo,
5085 ARM::VST1q16HighQPseudo,
5086 ARM::VST1q32HighQPseudo,
5087 ARM::VST1q64HighQPseudo };
5088 SelectVST(N, false, 4, DOpcodes, QOpcodes0, QOpcodes1);
5089 return;
5090 }
5091
5092 case Intrinsic::arm_neon_vst2: {
5093 static const uint16_t DOpcodes[] = { ARM::VST2d8, ARM::VST2d16,
5094 ARM::VST2d32, ARM::VST1q64 };
5095 static const uint16_t QOpcodes[] = { ARM::VST2q8Pseudo, ARM::VST2q16Pseudo,
5096 ARM::VST2q32Pseudo };
5097 SelectVST(N, false, 2, DOpcodes, QOpcodes, nullptr);
5098 return;
5099 }
5100
5101 case Intrinsic::arm_neon_vst3: {
5102 static const uint16_t DOpcodes[] = { ARM::VST3d8Pseudo,
5103 ARM::VST3d16Pseudo,
5104 ARM::VST3d32Pseudo,
5105 ARM::VST1d64TPseudo };
5106 static const uint16_t QOpcodes0[] = { ARM::VST3q8Pseudo_UPD,
5107 ARM::VST3q16Pseudo_UPD,
5108 ARM::VST3q32Pseudo_UPD };
5109 static const uint16_t QOpcodes1[] = { ARM::VST3q8oddPseudo,
5110 ARM::VST3q16oddPseudo,
5111 ARM::VST3q32oddPseudo };
5112 SelectVST(N, false, 3, DOpcodes, QOpcodes0, QOpcodes1);
5113 return;
5114 }
5115
5116 case Intrinsic::arm_neon_vst4: {
5117 static const uint16_t DOpcodes[] = { ARM::VST4d8Pseudo,
5118 ARM::VST4d16Pseudo,
5119 ARM::VST4d32Pseudo,
5120 ARM::VST1d64QPseudo };
5121 static const uint16_t QOpcodes0[] = { ARM::VST4q8Pseudo_UPD,
5122 ARM::VST4q16Pseudo_UPD,
5123 ARM::VST4q32Pseudo_UPD };
5124 static const uint16_t QOpcodes1[] = { ARM::VST4q8oddPseudo,
5125 ARM::VST4q16oddPseudo,
5126 ARM::VST4q32oddPseudo };
5127 SelectVST(N, false, 4, DOpcodes, QOpcodes0, QOpcodes1);
5128 return;
5129 }
5130
5131 case Intrinsic::arm_neon_vst2lane: {
5132 static const uint16_t DOpcodes[] = { ARM::VST2LNd8Pseudo,
5133 ARM::VST2LNd16Pseudo,
5134 ARM::VST2LNd32Pseudo };
5135 static const uint16_t QOpcodes[] = { ARM::VST2LNq16Pseudo,
5136 ARM::VST2LNq32Pseudo };
5137 SelectVLDSTLane(N, false, false, 2, DOpcodes, QOpcodes);
5138 return;
5139 }
5140
5141 case Intrinsic::arm_neon_vst3lane: {
5142 static const uint16_t DOpcodes[] = { ARM::VST3LNd8Pseudo,
5143 ARM::VST3LNd16Pseudo,
5144 ARM::VST3LNd32Pseudo };
5145 static const uint16_t QOpcodes[] = { ARM::VST3LNq16Pseudo,
5146 ARM::VST3LNq32Pseudo };
5147 SelectVLDSTLane(N, false, false, 3, DOpcodes, QOpcodes);
5148 return;
5149 }
5150
5151 case Intrinsic::arm_neon_vst4lane: {
5152 static const uint16_t DOpcodes[] = { ARM::VST4LNd8Pseudo,
5153 ARM::VST4LNd16Pseudo,
5154 ARM::VST4LNd32Pseudo };
5155 static const uint16_t QOpcodes[] = { ARM::VST4LNq16Pseudo,
5156 ARM::VST4LNq32Pseudo };
5157 SelectVLDSTLane(N, false, false, 4, DOpcodes, QOpcodes);
5158 return;
5159 }
5160
5161 case Intrinsic::arm_mve_vldr_gather_base_wb:
5162 case Intrinsic::arm_mve_vldr_gather_base_wb_predicated: {
5163 static const uint16_t Opcodes[] = {ARM::MVE_VLDRWU32_qi_pre,
5164 ARM::MVE_VLDRDU64_qi_pre};
5165 SelectMVE_WB(N, Opcodes,
5166 IntNo == Intrinsic::arm_mve_vldr_gather_base_wb_predicated);
5167 return;
5168 }
5169
5170 case Intrinsic::arm_mve_vld2q: {
5171 static const uint16_t Opcodes8[] = {ARM::MVE_VLD20_8, ARM::MVE_VLD21_8};
5172 static const uint16_t Opcodes16[] = {ARM::MVE_VLD20_16,
5173 ARM::MVE_VLD21_16};
5174 static const uint16_t Opcodes32[] = {ARM::MVE_VLD20_32,
5175 ARM::MVE_VLD21_32};
5176 static const uint16_t *const Opcodes[] = {Opcodes8, Opcodes16, Opcodes32};
5177 SelectMVE_VLD(N, 2, Opcodes, false);
5178 return;
5179 }
5180
5181 case Intrinsic::arm_mve_vld4q: {
5182 static const uint16_t Opcodes8[] = {ARM::MVE_VLD40_8, ARM::MVE_VLD41_8,
5183 ARM::MVE_VLD42_8, ARM::MVE_VLD43_8};
5184 static const uint16_t Opcodes16[] = {ARM::MVE_VLD40_16, ARM::MVE_VLD41_16,
5185 ARM::MVE_VLD42_16,
5186 ARM::MVE_VLD43_16};
5187 static const uint16_t Opcodes32[] = {ARM::MVE_VLD40_32, ARM::MVE_VLD41_32,
5188 ARM::MVE_VLD42_32,
5189 ARM::MVE_VLD43_32};
5190 static const uint16_t *const Opcodes[] = {Opcodes8, Opcodes16, Opcodes32};
5191 SelectMVE_VLD(N, 4, Opcodes, false);
5192 return;
5193 }
5194 }
5195 break;
5196 }
5197
5198 case ISD::INTRINSIC_WO_CHAIN: {
5199 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
5200 switch (IntNo) {
5201 default:
5202 break;
5203
5204 // Scalar f32 -> bf16
5205 case Intrinsic::arm_neon_vcvtbfp2bf: {
5206 SDLoc dl(N);
5207 const SDValue &Src = N->getOperand(1);
5208 llvm::EVT DestTy = N->getValueType(0);
5209 SDValue Pred = getAL(CurDAG, dl);
5210 SDValue Reg0 = CurDAG->getRegister(0, MVT::i32);
5211 SDValue Ops[] = { Src, Src, Pred, Reg0 };
5212 CurDAG->SelectNodeTo(N, ARM::BF16_VCVTB, DestTy, Ops);
5213 return;
5214 }
5215
5216 // Vector v4f32 -> v4bf16
5217 case Intrinsic::arm_neon_vcvtfp2bf: {
5218 SDLoc dl(N);
5219 const SDValue &Src = N->getOperand(1);
5220 SDValue Pred = getAL(CurDAG, dl);
5221 SDValue Reg0 = CurDAG->getRegister(0, MVT::i32);
5222 SDValue Ops[] = { Src, Pred, Reg0 };
5223 CurDAG->SelectNodeTo(N, ARM::BF16_VCVT, MVT::v4bf16, Ops);
5224 return;
5225 }
5226
5227 case Intrinsic::arm_mve_urshrl:
5228 SelectMVE_LongShift(N, ARM::MVE_URSHRL, true, false);
5229 return;
5230 case Intrinsic::arm_mve_uqshll:
5231 SelectMVE_LongShift(N, ARM::MVE_UQSHLL, true, false);
5232 return;
5233 case Intrinsic::arm_mve_srshrl:
5234 SelectMVE_LongShift(N, ARM::MVE_SRSHRL, true, false);
5235 return;
5236 case Intrinsic::arm_mve_sqshll:
5237 SelectMVE_LongShift(N, ARM::MVE_SQSHLL, true, false);
5238 return;
5239 case Intrinsic::arm_mve_uqrshll:
5240 SelectMVE_LongShift(N, ARM::MVE_UQRSHLL, false, true);
5241 return;
5242 case Intrinsic::arm_mve_sqrshrl:
5243 SelectMVE_LongShift(N, ARM::MVE_SQRSHRL, false, true);
5244 return;
5245
5246 case Intrinsic::arm_mve_vadc:
5247 case Intrinsic::arm_mve_vadc_predicated:
5248 SelectMVE_VADCSBC(N, ARM::MVE_VADC, ARM::MVE_VADCI, true,
5249 IntNo == Intrinsic::arm_mve_vadc_predicated);
5250 return;
5251 case Intrinsic::arm_mve_vsbc:
5252 case Intrinsic::arm_mve_vsbc_predicated:
5253 SelectMVE_VADCSBC(N, ARM::MVE_VSBC, ARM::MVE_VSBCI, true,
5254 IntNo == Intrinsic::arm_mve_vsbc_predicated);
5255 return;
5256 case Intrinsic::arm_mve_vshlc:
5257 case Intrinsic::arm_mve_vshlc_predicated:
5258 SelectMVE_VSHLC(N, IntNo == Intrinsic::arm_mve_vshlc_predicated);
5259 return;
5260
5261 case Intrinsic::arm_mve_vmlldava:
5262 case Intrinsic::arm_mve_vmlldava_predicated: {
5263 static const uint16_t OpcodesU[] = {
5264 ARM::MVE_VMLALDAVu16, ARM::MVE_VMLALDAVu32,
5265 ARM::MVE_VMLALDAVau16, ARM::MVE_VMLALDAVau32,
5266 };
5267 static const uint16_t OpcodesS[] = {
5268 ARM::MVE_VMLALDAVs16, ARM::MVE_VMLALDAVs32,
5269 ARM::MVE_VMLALDAVas16, ARM::MVE_VMLALDAVas32,
5270 ARM::MVE_VMLALDAVxs16, ARM::MVE_VMLALDAVxs32,
5271 ARM::MVE_VMLALDAVaxs16, ARM::MVE_VMLALDAVaxs32,
5272 ARM::MVE_VMLSLDAVs16, ARM::MVE_VMLSLDAVs32,
5273 ARM::MVE_VMLSLDAVas16, ARM::MVE_VMLSLDAVas32,
5274 ARM::MVE_VMLSLDAVxs16, ARM::MVE_VMLSLDAVxs32,
5275 ARM::MVE_VMLSLDAVaxs16, ARM::MVE_VMLSLDAVaxs32,
5276 };
5277 SelectMVE_VMLLDAV(N, IntNo == Intrinsic::arm_mve_vmlldava_predicated,
5278 OpcodesS, OpcodesU);
5279 return;
5280 }
5281
5282 case Intrinsic::arm_mve_vrmlldavha:
5283 case Intrinsic::arm_mve_vrmlldavha_predicated: {
5284 static const uint16_t OpcodesU[] = {
5285 ARM::MVE_VRMLALDAVHu32, ARM::MVE_VRMLALDAVHau32,
5286 };
5287 static const uint16_t OpcodesS[] = {
5288 ARM::MVE_VRMLALDAVHs32, ARM::MVE_VRMLALDAVHas32,
5289 ARM::MVE_VRMLALDAVHxs32, ARM::MVE_VRMLALDAVHaxs32,
5290 ARM::MVE_VRMLSLDAVHs32, ARM::MVE_VRMLSLDAVHas32,
5291 ARM::MVE_VRMLSLDAVHxs32, ARM::MVE_VRMLSLDAVHaxs32,
5292 };
5293 SelectMVE_VRMLLDAVH(N, IntNo == Intrinsic::arm_mve_vrmlldavha_predicated,
5294 OpcodesS, OpcodesU);
5295 return;
5296 }
5297
5298 case Intrinsic::arm_mve_vidup:
5299 case Intrinsic::arm_mve_vidup_predicated: {
5300 static const uint16_t Opcodes[] = {
5301 ARM::MVE_VIDUPu8, ARM::MVE_VIDUPu16, ARM::MVE_VIDUPu32,
5302 };
5303 SelectMVE_VxDUP(N, Opcodes, false,
5304 IntNo == Intrinsic::arm_mve_vidup_predicated);
5305 return;
5306 }
5307
5308 case Intrinsic::arm_mve_vddup:
5309 case Intrinsic::arm_mve_vddup_predicated: {
5310 static const uint16_t Opcodes[] = {
5311 ARM::MVE_VDDUPu8, ARM::MVE_VDDUPu16, ARM::MVE_VDDUPu32,
5312 };
5313 SelectMVE_VxDUP(N, Opcodes, false,
5314 IntNo == Intrinsic::arm_mve_vddup_predicated);
5315 return;
5316 }
5317
5318 case Intrinsic::arm_mve_viwdup:
5319 case Intrinsic::arm_mve_viwdup_predicated: {
5320 static const uint16_t Opcodes[] = {
5321 ARM::MVE_VIWDUPu8, ARM::MVE_VIWDUPu16, ARM::MVE_VIWDUPu32,
5322 };
5323 SelectMVE_VxDUP(N, Opcodes, true,
5324 IntNo == Intrinsic::arm_mve_viwdup_predicated);
5325 return;
5326 }
5327
5328 case Intrinsic::arm_mve_vdwdup:
5329 case Intrinsic::arm_mve_vdwdup_predicated: {
5330 static const uint16_t Opcodes[] = {
5331 ARM::MVE_VDWDUPu8, ARM::MVE_VDWDUPu16, ARM::MVE_VDWDUPu32,
5332 };
5333 SelectMVE_VxDUP(N, Opcodes, true,
5334 IntNo == Intrinsic::arm_mve_vdwdup_predicated);
5335 return;
5336 }
5337
5338 case Intrinsic::arm_cde_cx1d:
5339 case Intrinsic::arm_cde_cx1da:
5340 case Intrinsic::arm_cde_cx2d:
5341 case Intrinsic::arm_cde_cx2da:
5342 case Intrinsic::arm_cde_cx3d:
5343 case Intrinsic::arm_cde_cx3da: {
5344 bool HasAccum = IntNo == Intrinsic::arm_cde_cx1da ||
5345 IntNo == Intrinsic::arm_cde_cx2da ||
5346 IntNo == Intrinsic::arm_cde_cx3da;
5347 size_t NumExtraOps;
5348 uint16_t Opcode;
5349 switch (IntNo) {
5350 case Intrinsic::arm_cde_cx1d:
5351 case Intrinsic::arm_cde_cx1da:
5352 NumExtraOps = 0;
5353 Opcode = HasAccum ? ARM::CDE_CX1DA : ARM::CDE_CX1D;
5354 break;
5355 case Intrinsic::arm_cde_cx2d:
5356 case Intrinsic::arm_cde_cx2da:
5357 NumExtraOps = 1;
5358 Opcode = HasAccum ? ARM::CDE_CX2DA : ARM::CDE_CX2D;
5359 break;
5360 case Intrinsic::arm_cde_cx3d:
5361 case Intrinsic::arm_cde_cx3da:
5362 NumExtraOps = 2;
5363 Opcode = HasAccum ? ARM::CDE_CX3DA : ARM::CDE_CX3D;
5364 break;
5365 default:
5366 llvm_unreachable("Unexpected opcode")::llvm::llvm_unreachable_internal("Unexpected opcode", "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp"
, 5366);
5367 }
5368 SelectCDE_CXxD(N, Opcode, NumExtraOps, HasAccum);
5369 return;
5370 }
5371 }
5372 break;
5373 }
5374
5375 case ISD::ATOMIC_CMP_SWAP:
5376 SelectCMP_SWAP(N);
5377 return;
5378 }
5379
5380 SelectCode(N);
5381}
5382
5383// Inspect a register string of the form
5384// cp<coprocessor>:<opc1>:c<CRn>:c<CRm>:<opc2> (32bit) or
5385// cp<coprocessor>:<opc1>:c<CRm> (64bit) inspect the fields of the string
5386// and obtain the integer operands from them, adding these operands to the
5387// provided vector.
5388static void getIntOperandsFromRegisterString(StringRef RegString,
5389 SelectionDAG *CurDAG,
5390 const SDLoc &DL,
5391 std::vector<SDValue> &Ops) {
5392 SmallVector<StringRef, 5> Fields;
5393 RegString.split(Fields, ':');
5394
5395 if (Fields.size() > 1) {
5396 bool AllIntFields = true;
5397
5398 for (StringRef Field : Fields) {
5399 // Need to trim out leading 'cp' characters and get the integer field.
5400 unsigned IntField;
5401 AllIntFields &= !Field.trim("CPcp").getAsInteger(10, IntField);
5402 Ops.push_back(CurDAG->getTargetConstant(IntField, DL, MVT::i32));
5403 }
5404
5405 assert(AllIntFields &&(static_cast <bool> (AllIntFields && "Unexpected non-integer value in special register string."
) ? void (0) : __assert_fail ("AllIntFields && \"Unexpected non-integer value in special register string.\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 5406, __extension__
__PRETTY_FUNCTION__))
5406 "Unexpected non-integer value in special register string.")(static_cast <bool> (AllIntFields && "Unexpected non-integer value in special register string."
) ? void (0) : __assert_fail ("AllIntFields && \"Unexpected non-integer value in special register string.\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 5406, __extension__
__PRETTY_FUNCTION__));
5407 (void)AllIntFields;
5408 }
5409}
5410
5411// Maps a Banked Register string to its mask value. The mask value returned is
5412// for use in the MRSbanked / MSRbanked instruction nodes as the Banked Register
5413// mask operand, which expresses which register is to be used, e.g. r8, and in
5414// which mode it is to be used, e.g. usr. Returns -1 to signify that the string
5415// was invalid.
5416static inline int getBankedRegisterMask(StringRef RegString) {
5417 auto TheReg = ARMBankedReg::lookupBankedRegByName(RegString.lower());
5418 if (!TheReg)
5419 return -1;
5420 return TheReg->Encoding;
5421}
5422
5423// The flags here are common to those allowed for apsr in the A class cores and
5424// those allowed for the special registers in the M class cores. Returns a
5425// value representing which flags were present, -1 if invalid.
5426static inline int getMClassFlagsMask(StringRef Flags) {
5427 return StringSwitch<int>(Flags)
5428 .Case("", 0x2) // no flags means nzcvq for psr registers, and 0x2 is
5429 // correct when flags are not permitted
5430 .Case("g", 0x1)
5431 .Case("nzcvq", 0x2)
5432 .Case("nzcvqg", 0x3)
5433 .Default(-1);
5434}
5435
5436// Maps MClass special registers string to its value for use in the
5437// t2MRS_M/t2MSR_M instruction nodes as the SYSm value operand.
5438// Returns -1 to signify that the string was invalid.
5439static int getMClassRegisterMask(StringRef Reg, const ARMSubtarget *Subtarget) {
5440 auto TheReg = ARMSysReg::lookupMClassSysRegByName(Reg);
5441 const FeatureBitset &FeatureBits = Subtarget->getFeatureBits();
5442 if (!TheReg || !TheReg->hasRequiredFeatures(FeatureBits))
5443 return -1;
5444 return (int)(TheReg->Encoding & 0xFFF); // SYSm value
5445}
5446
5447static int getARClassRegisterMask(StringRef Reg, StringRef Flags) {
5448 // The mask operand contains the special register (R Bit) in bit 4, whether
5449 // the register is spsr (R bit is 1) or one of cpsr/apsr (R bit is 0), and
5450 // bits 3-0 contains the fields to be accessed in the special register, set by
5451 // the flags provided with the register.
5452 int Mask = 0;
5453 if (Reg == "apsr") {
5454 // The flags permitted for apsr are the same flags that are allowed in
5455 // M class registers. We get the flag value and then shift the flags into
5456 // the correct place to combine with the mask.
5457 Mask = getMClassFlagsMask(Flags);
5458 if (Mask == -1)
5459 return -1;
5460 return Mask << 2;
5461 }
5462
5463 if (Reg != "cpsr" && Reg != "spsr") {
5464 return -1;
5465 }
5466
5467 // This is the same as if the flags were "fc"
5468 if (Flags.empty() || Flags == "all")
5469 return Mask | 0x9;
5470
5471 // Inspect the supplied flags string and set the bits in the mask for
5472 // the relevant and valid flags allowed for cpsr and spsr.
5473 for (char Flag : Flags) {
5474 int FlagVal;
5475 switch (Flag) {
5476 case 'c':
5477 FlagVal = 0x1;
5478 break;
5479 case 'x':
5480 FlagVal = 0x2;
5481 break;
5482 case 's':
5483 FlagVal = 0x4;
5484 break;
5485 case 'f':
5486 FlagVal = 0x8;
5487 break;
5488 default:
5489 FlagVal = 0;
5490 }
5491
5492 // This avoids allowing strings where the same flag bit appears twice.
5493 if (!FlagVal || (Mask & FlagVal))
5494 return -1;
5495 Mask |= FlagVal;
5496 }
5497
5498 // If the register is spsr then we need to set the R bit.
5499 if (Reg == "spsr")
5500 Mask |= 0x10;
5501
5502 return Mask;
5503}
5504
5505// Lower the read_register intrinsic to ARM specific DAG nodes
5506// using the supplied metadata string to select the instruction node to use
5507// and the registers/masks to construct as operands for the node.
5508bool ARMDAGToDAGISel::tryReadRegister(SDNode *N){
5509 const auto *MD = cast<MDNodeSDNode>(N->getOperand(1));
5510 const auto *RegString = cast<MDString>(MD->getMD()->getOperand(0));
5511 bool IsThumb2 = Subtarget->isThumb2();
5512 SDLoc DL(N);
5513
5514 std::vector<SDValue> Ops;
5515 getIntOperandsFromRegisterString(RegString->getString(), CurDAG, DL, Ops);
5516
5517 if (!Ops.empty()) {
5518 // If the special register string was constructed of fields (as defined
5519 // in the ACLE) then need to lower to MRC node (32 bit) or
5520 // MRRC node(64 bit), we can make the distinction based on the number of
5521 // operands we have.
5522 unsigned Opcode;
5523 SmallVector<EVT, 3> ResTypes;
5524 if (Ops.size() == 5){
5525 Opcode = IsThumb2 ? ARM::t2MRC : ARM::MRC;
5526 ResTypes.append({ MVT::i32, MVT::Other });
5527 } else {
5528 assert(Ops.size() == 3 &&(static_cast <bool> (Ops.size() == 3 && "Invalid number of fields in special register string."
) ? void (0) : __assert_fail ("Ops.size() == 3 && \"Invalid number of fields in special register string.\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 5529, __extension__
__PRETTY_FUNCTION__))
5529 "Invalid number of fields in special register string.")(static_cast <bool> (Ops.size() == 3 && "Invalid number of fields in special register string."
) ? void (0) : __assert_fail ("Ops.size() == 3 && \"Invalid number of fields in special register string.\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 5529, __extension__
__PRETTY_FUNCTION__));
5530 Opcode = IsThumb2 ? ARM::t2MRRC : ARM::MRRC;
5531 ResTypes.append({ MVT::i32, MVT::i32, MVT::Other });
5532 }
5533
5534 Ops.push_back(getAL(CurDAG, DL));
5535 Ops.push_back(CurDAG->getRegister(0, MVT::i32));
5536 Ops.push_back(N->getOperand(0));
5537 ReplaceNode(N, CurDAG->getMachineNode(Opcode, DL, ResTypes, Ops));
5538 return true;
5539 }
5540
5541 std::string SpecialReg = RegString->getString().lower();
5542
5543 int BankedReg = getBankedRegisterMask(SpecialReg);
5544 if (BankedReg != -1) {
5545 Ops = { CurDAG->getTargetConstant(BankedReg, DL, MVT::i32),
5546 getAL(CurDAG, DL), CurDAG->getRegister(0, MVT::i32),
5547 N->getOperand(0) };
5548 ReplaceNode(
5549 N, CurDAG->getMachineNode(IsThumb2 ? ARM::t2MRSbanked : ARM::MRSbanked,
5550 DL, MVT::i32, MVT::Other, Ops));
5551 return true;
5552 }
5553
5554 // The VFP registers are read by creating SelectionDAG nodes with opcodes
5555 // corresponding to the register that is being read from. So we switch on the
5556 // string to find which opcode we need to use.
5557 unsigned Opcode = StringSwitch<unsigned>(SpecialReg)
5558 .Case("fpscr", ARM::VMRS)
5559 .Case("fpexc", ARM::VMRS_FPEXC)
5560 .Case("fpsid", ARM::VMRS_FPSID)
5561 .Case("mvfr0", ARM::VMRS_MVFR0)
5562 .Case("mvfr1", ARM::VMRS_MVFR1)
5563 .Case("mvfr2", ARM::VMRS_MVFR2)
5564 .Case("fpinst", ARM::VMRS_FPINST)
5565 .Case("fpinst2", ARM::VMRS_FPINST2)
5566 .Default(0);
5567
5568 // If an opcode was found then we can lower the read to a VFP instruction.
5569 if (Opcode) {
5570 if (!Subtarget->hasVFP2Base())
5571 return false;
5572 if (Opcode == ARM::VMRS_MVFR2 && !Subtarget->hasFPARMv8Base())
5573 return false;
5574
5575 Ops = { getAL(CurDAG, DL), CurDAG->getRegister(0, MVT::i32),
5576 N->getOperand(0) };
5577 ReplaceNode(N,
5578 CurDAG->getMachineNode(Opcode, DL, MVT::i32, MVT::Other, Ops));
5579 return true;
5580 }
5581
5582 // If the target is M Class then need to validate that the register string
5583 // is an acceptable value, so check that a mask can be constructed from the
5584 // string.
5585 if (Subtarget->isMClass()) {
5586 int SYSmValue = getMClassRegisterMask(SpecialReg, Subtarget);
5587 if (SYSmValue == -1)
5588 return false;
5589
5590 SDValue Ops[] = { CurDAG->getTargetConstant(SYSmValue, DL, MVT::i32),
5591 getAL(CurDAG, DL), CurDAG->getRegister(0, MVT::i32),
5592 N->getOperand(0) };
5593 ReplaceNode(
5594 N, CurDAG->getMachineNode(ARM::t2MRS_M, DL, MVT::i32, MVT::Other, Ops));
5595 return true;
5596 }
5597
5598 // Here we know the target is not M Class so we need to check if it is one
5599 // of the remaining possible values which are apsr, cpsr or spsr.
5600 if (SpecialReg == "apsr" || SpecialReg == "cpsr") {
5601 Ops = { getAL(CurDAG, DL), CurDAG->getRegister(0, MVT::i32),
5602 N->getOperand(0) };
5603 ReplaceNode(N, CurDAG->getMachineNode(IsThumb2 ? ARM::t2MRS_AR : ARM::MRS,
5604 DL, MVT::i32, MVT::Other, Ops));
5605 return true;
5606 }
5607
5608 if (SpecialReg == "spsr") {
5609 Ops = { getAL(CurDAG, DL), CurDAG->getRegister(0, MVT::i32),
5610 N->getOperand(0) };
5611 ReplaceNode(
5612 N, CurDAG->getMachineNode(IsThumb2 ? ARM::t2MRSsys_AR : ARM::MRSsys, DL,
5613 MVT::i32, MVT::Other, Ops));
5614 return true;
5615 }
5616
5617 return false;
5618}
5619
5620// Lower the write_register intrinsic to ARM specific DAG nodes
5621// using the supplied metadata string to select the instruction node to use
5622// and the registers/masks to use in the nodes
5623bool ARMDAGToDAGISel::tryWriteRegister(SDNode *N){
5624 const auto *MD = cast<MDNodeSDNode>(N->getOperand(1));
5625 const auto *RegString = cast<MDString>(MD->getMD()->getOperand(0));
5626 bool IsThumb2 = Subtarget->isThumb2();
5627 SDLoc DL(N);
5628
5629 std::vector<SDValue> Ops;
5630 getIntOperandsFromRegisterString(RegString->getString(), CurDAG, DL, Ops);
5631
5632 if (!Ops.empty()) {
5633 // If the special register string was constructed of fields (as defined
5634 // in the ACLE) then need to lower to MCR node (32 bit) or
5635 // MCRR node(64 bit), we can make the distinction based on the number of
5636 // operands we have.
5637 unsigned Opcode;
5638 if (Ops.size() == 5) {
5639 Opcode = IsThumb2 ? ARM::t2MCR : ARM::MCR;
5640 Ops.insert(Ops.begin()+2, N->getOperand(2));
5641 } else {
5642 assert(Ops.size() == 3 &&(static_cast <bool> (Ops.size() == 3 && "Invalid number of fields in special register string."
) ? void (0) : __assert_fail ("Ops.size() == 3 && \"Invalid number of fields in special register string.\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 5643, __extension__
__PRETTY_FUNCTION__))
5643 "Invalid number of fields in special register string.")(static_cast <bool> (Ops.size() == 3 && "Invalid number of fields in special register string."
) ? void (0) : __assert_fail ("Ops.size() == 3 && \"Invalid number of fields in special register string.\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 5643, __extension__
__PRETTY_FUNCTION__));
5644 Opcode = IsThumb2 ? ARM::t2MCRR : ARM::MCRR;
5645 SDValue WriteValue[] = { N->getOperand(2), N->getOperand(3) };
5646 Ops.insert(Ops.begin()+2, WriteValue, WriteValue+2);
5647 }
5648
5649 Ops.push_back(getAL(CurDAG, DL));
5650 Ops.push_back(CurDAG->getRegister(0, MVT::i32));
5651 Ops.push_back(N->getOperand(0));
5652
5653 ReplaceNode(N, CurDAG->getMachineNode(Opcode, DL, MVT::Other, Ops));
5654 return true;
5655 }
5656
5657 std::string SpecialReg = RegString->getString().lower();
5658 int BankedReg = getBankedRegisterMask(SpecialReg);
5659 if (BankedReg != -1) {
5660 Ops = { CurDAG->getTargetConstant(BankedReg, DL, MVT::i32), N->getOperand(2),
5661 getAL(CurDAG, DL), CurDAG->getRegister(0, MVT::i32),
5662 N->getOperand(0) };
5663 ReplaceNode(
5664 N, CurDAG->getMachineNode(IsThumb2 ? ARM::t2MSRbanked : ARM::MSRbanked,
5665 DL, MVT::Other, Ops));
5666 return true;
5667 }
5668
5669 // The VFP registers are written to by creating SelectionDAG nodes with
5670 // opcodes corresponding to the register that is being written. So we switch
5671 // on the string to find which opcode we need to use.
5672 unsigned Opcode = StringSwitch<unsigned>(SpecialReg)
5673 .Case("fpscr", ARM::VMSR)
5674 .Case("fpexc", ARM::VMSR_FPEXC)
5675 .Case("fpsid", ARM::VMSR_FPSID)
5676 .Case("fpinst", ARM::VMSR_FPINST)
5677 .Case("fpinst2", ARM::VMSR_FPINST2)
5678 .Default(0);
5679
5680 if (Opcode) {
5681 if (!Subtarget->hasVFP2Base())
5682 return false;
5683 Ops = { N->getOperand(2), getAL(CurDAG, DL),
5684 CurDAG->getRegister(0, MVT::i32), N->getOperand(0) };
5685 ReplaceNode(N, CurDAG->getMachineNode(Opcode, DL, MVT::Other, Ops));
5686 return true;
5687 }
5688
5689 std::pair<StringRef, StringRef> Fields;
5690 Fields = StringRef(SpecialReg).rsplit('_');
5691 std::string Reg = Fields.first.str();
5692 StringRef Flags = Fields.second;
5693
5694 // If the target was M Class then need to validate the special register value
5695 // and retrieve the mask for use in the instruction node.
5696 if (Subtarget->isMClass()) {
5697 int SYSmValue = getMClassRegisterMask(SpecialReg, Subtarget);
5698 if (SYSmValue == -1)
5699 return false;
5700
5701 SDValue Ops[] = { CurDAG->getTargetConstant(SYSmValue, DL, MVT::i32),
5702 N->getOperand(2), getAL(CurDAG, DL),
5703 CurDAG->getRegister(0, MVT::i32), N->getOperand(0) };
5704 ReplaceNode(N, CurDAG->getMachineNode(ARM::t2MSR_M, DL, MVT::Other, Ops));
5705 return true;
5706 }
5707
5708 // We then check to see if a valid mask can be constructed for one of the
5709 // register string values permitted for the A and R class cores. These values
5710 // are apsr, spsr and cpsr; these are also valid on older cores.
5711 int Mask = getARClassRegisterMask(Reg, Flags);
5712 if (Mask != -1) {
5713 Ops = { CurDAG->getTargetConstant(Mask, DL, MVT::i32), N->getOperand(2),
5714 getAL(CurDAG, DL), CurDAG->getRegister(0, MVT::i32),
5715 N->getOperand(0) };
5716 ReplaceNode(N, CurDAG->getMachineNode(IsThumb2 ? ARM::t2MSR_AR : ARM::MSR,
5717 DL, MVT::Other, Ops));
5718 return true;
5719 }
5720
5721 return false;
5722}
5723
5724bool ARMDAGToDAGISel::tryInlineAsm(SDNode *N){
5725 std::vector<SDValue> AsmNodeOperands;
5726 unsigned Flag, Kind;
5727 bool Changed = false;
5728 unsigned NumOps = N->getNumOperands();
5729
5730 // Normally, i64 data is bounded to two arbitrary GRPs for "%r" constraint.
5731 // However, some instrstions (e.g. ldrexd/strexd in ARM mode) require
5732 // (even/even+1) GPRs and use %n and %Hn to refer to the individual regs
5733 // respectively. Since there is no constraint to explicitly specify a
5734 // reg pair, we use GPRPair reg class for "%r" for 64-bit data. For Thumb,
5735 // the 64-bit data may be referred by H, Q, R modifiers, so we still pack
5736 // them into a GPRPair.
5737
5738 SDLoc dl(N);
5739 SDValue Glue = N->getGluedNode() ? N->getOperand(NumOps - 1) : SDValue();
5740
5741 SmallVector<bool, 8> OpChanged;
5742 // Glue node will be appended late.
5743 for(unsigned i = 0, e = N->getGluedNode() ? NumOps - 1 : NumOps; i < e; ++i) {
5744 SDValue op = N->getOperand(i);
5745 AsmNodeOperands.push_back(op);
5746
5747 if (i < InlineAsm::Op_FirstOperand)
5748 continue;
5749
5750 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(i))) {
5751 Flag = C->getZExtValue();
5752 Kind = InlineAsm::getKind(Flag);
5753 }
5754 else
5755 continue;
5756
5757 // Immediate operands to inline asm in the SelectionDAG are modeled with
5758 // two operands. The first is a constant of value InlineAsm::Kind_Imm, and
5759 // the second is a constant with the value of the immediate. If we get here
5760 // and we have a Kind_Imm, skip the next operand, and continue.
5761 if (Kind == InlineAsm::Kind_Imm) {
5762 SDValue op = N->getOperand(++i);
5763 AsmNodeOperands.push_back(op);
5764 continue;
5765 }
5766
5767 unsigned NumRegs = InlineAsm::getNumOperandRegisters(Flag);
5768 if (NumRegs)
5769 OpChanged.push_back(false);
5770
5771 unsigned DefIdx = 0;
5772 bool IsTiedToChangedOp = false;
5773 // If it's a use that is tied with a previous def, it has no
5774 // reg class constraint.
5775 if (Changed && InlineAsm::isUseOperandTiedToDef(Flag, DefIdx))
5776 IsTiedToChangedOp = OpChanged[DefIdx];
5777
5778 // Memory operands to inline asm in the SelectionDAG are modeled with two
5779 // operands: a constant of value InlineAsm::Kind_Mem followed by the input
5780 // operand. If we get here and we have a Kind_Mem, skip the next operand (so
5781 // it doesn't get misinterpreted), and continue. We do this here because
5782 // it's important to update the OpChanged array correctly before moving on.
5783 if (Kind == InlineAsm::Kind_Mem) {
5784 SDValue op = N->getOperand(++i);
5785 AsmNodeOperands.push_back(op);
5786 continue;
5787 }
5788
5789 if (Kind != InlineAsm::Kind_RegUse && Kind != InlineAsm::Kind_RegDef
5790 && Kind != InlineAsm::Kind_RegDefEarlyClobber)
5791 continue;
5792
5793 unsigned RC;
5794 bool HasRC = InlineAsm::hasRegClassConstraint(Flag, RC);
5795 if ((!IsTiedToChangedOp && (!HasRC || RC != ARM::GPRRegClassID))
5796 || NumRegs != 2)
5797 continue;
5798
5799 assert((i+2 < NumOps) && "Invalid number of operands in inline asm")(static_cast <bool> ((i+2 < NumOps) && "Invalid number of operands in inline asm"
) ? void (0) : __assert_fail ("(i+2 < NumOps) && \"Invalid number of operands in inline asm\""
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 5799, __extension__
__PRETTY_FUNCTION__));
5800 SDValue V0 = N->getOperand(i+1);
5801 SDValue V1 = N->getOperand(i+2);
5802 Register Reg0 = cast<RegisterSDNode>(V0)->getReg();
5803 Register Reg1 = cast<RegisterSDNode>(V1)->getReg();
5804 SDValue PairedReg;
5805 MachineRegisterInfo &MRI = MF->getRegInfo();
5806
5807 if (Kind == InlineAsm::Kind_RegDef ||
5808 Kind == InlineAsm::Kind_RegDefEarlyClobber) {
5809 // Replace the two GPRs with 1 GPRPair and copy values from GPRPair to
5810 // the original GPRs.
5811
5812 Register GPVR = MRI.createVirtualRegister(&ARM::GPRPairRegClass);
5813 PairedReg = CurDAG->getRegister(GPVR, MVT::Untyped);
5814 SDValue Chain = SDValue(N,0);
5815
5816 SDNode *GU = N->getGluedUser();
5817 SDValue RegCopy = CurDAG->getCopyFromReg(Chain, dl, GPVR, MVT::Untyped,
5818 Chain.getValue(1));
5819
5820 // Extract values from a GPRPair reg and copy to the original GPR reg.
5821 SDValue Sub0 = CurDAG->getTargetExtractSubreg(ARM::gsub_0, dl, MVT::i32,
5822 RegCopy);
5823 SDValue Sub1 = CurDAG->getTargetExtractSubreg(ARM::gsub_1, dl, MVT::i32,
5824 RegCopy);
5825 SDValue T0 = CurDAG->getCopyToReg(Sub0, dl, Reg0, Sub0,
5826 RegCopy.getValue(1));
5827 SDValue T1 = CurDAG->getCopyToReg(Sub1, dl, Reg1, Sub1, T0.getValue(1));
5828
5829 // Update the original glue user.
5830 std::vector<SDValue> Ops(GU->op_begin(), GU->op_end()-1);
5831 Ops.push_back(T1.getValue(1));
5832 CurDAG->UpdateNodeOperands(GU, Ops);
5833 }
5834 else {
5835 // For Kind == InlineAsm::Kind_RegUse, we first copy two GPRs into a
5836 // GPRPair and then pass the GPRPair to the inline asm.
5837 SDValue Chain = AsmNodeOperands[InlineAsm::Op_InputChain];
5838
5839 // As REG_SEQ doesn't take RegisterSDNode, we copy them first.
5840 SDValue T0 = CurDAG->getCopyFromReg(Chain, dl, Reg0, MVT::i32,
5841 Chain.getValue(1));
5842 SDValue T1 = CurDAG->getCopyFromReg(Chain, dl, Reg1, MVT::i32,
5843 T0.getValue(1));
5844 SDValue Pair = SDValue(createGPRPairNode(MVT::Untyped, T0, T1), 0);
5845
5846 // Copy REG_SEQ into a GPRPair-typed VR and replace the original two
5847 // i32 VRs of inline asm with it.
5848 Register GPVR = MRI.createVirtualRegister(&ARM::GPRPairRegClass);
5849 PairedReg = CurDAG->getRegister(GPVR, MVT::Untyped);
5850 Chain = CurDAG->getCopyToReg(T1, dl, GPVR, Pair, T1.getValue(1));
5851
5852 AsmNodeOperands[InlineAsm::Op_InputChain] = Chain;
5853 Glue = Chain.getValue(1);
5854 }
5855
5856 Changed = true;
5857
5858 if(PairedReg.getNode()) {
5859 OpChanged[OpChanged.size() -1 ] = true;
5860 Flag = InlineAsm::getFlagWord(Kind, 1 /* RegNum*/);
5861 if (IsTiedToChangedOp)
5862 Flag = InlineAsm::getFlagWordForMatchingOp(Flag, DefIdx);
5863 else
5864 Flag = InlineAsm::getFlagWordForRegClass(Flag, ARM::GPRPairRegClassID);
5865 // Replace the current flag.
5866 AsmNodeOperands[AsmNodeOperands.size() -1] = CurDAG->getTargetConstant(
5867 Flag, dl, MVT::i32);
5868 // Add the new register node and skip the original two GPRs.
5869 AsmNodeOperands.push_back(PairedReg);
5870 // Skip the next two GPRs.
5871 i += 2;
5872 }
5873 }
5874
5875 if (Glue.getNode())
5876 AsmNodeOperands.push_back(Glue);
5877 if (!Changed)
5878 return false;
5879
5880 SDValue New = CurDAG->getNode(N->getOpcode(), SDLoc(N),
5881 CurDAG->getVTList(MVT::Other, MVT::Glue), AsmNodeOperands);
5882 New->setNodeId(-1);
5883 ReplaceNode(N, New.getNode());
5884 return true;
5885}
5886
5887
5888bool ARMDAGToDAGISel::
5889SelectInlineAsmMemoryOperand(const SDValue &Op, unsigned ConstraintID,
5890 std::vector<SDValue> &OutOps) {
5891 switch(ConstraintID) {
5892 default:
5893 llvm_unreachable("Unexpected asm memory constraint")::llvm::llvm_unreachable_internal("Unexpected asm memory constraint"
, "llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp", 5893);
5894 case InlineAsm::Constraint_m:
5895 case InlineAsm::Constraint_o:
5896 case InlineAsm::Constraint_Q:
5897 case InlineAsm::Constraint_Um:
5898 case InlineAsm::Constraint_Un:
5899 case InlineAsm::Constraint_Uq:
5900 case InlineAsm::Constraint_Us:
5901 case InlineAsm::Constraint_Ut:
5902 case InlineAsm::Constraint_Uv:
5903 case InlineAsm::Constraint_Uy:
5904 // Require the address to be in a register. That is safe for all ARM
5905 // variants and it is hard to do anything much smarter without knowing
5906 // how the operand is used.
5907 OutOps.push_back(Op);
5908 return false;
5909 }
5910 return true;
5911}
5912
5913/// createARMISelDag - This pass converts a legalized DAG into a
5914/// ARM-specific DAG, ready for instruction scheduling.
5915///
5916FunctionPass *llvm::createARMISelDag(ARMBaseTargetMachine &TM,
5917 CodeGenOpt::Level OptLevel) {
5918 return new ARMDAGToDAGISel(TM, OptLevel);
5919}