LLVM 22.0.0git
AMDGPUInstructionSelector.h
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1//===- AMDGPUInstructionSelector --------------------------------*- C++ -*-==//
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/// \file
9/// This file declares the targeting of the InstructionSelector class for
10/// AMDGPU.
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUINSTRUCTIONSELECTOR_H
14#define LLVM_LIB_TARGET_AMDGPU_AMDGPUINSTRUCTIONSELECTOR_H
15
16#include "SIDefines.h"
18#include "llvm/IR/InstrTypes.h"
19
20namespace {
21#define GET_GLOBALISEL_PREDICATE_BITSET
22#define AMDGPUSubtarget GCNSubtarget
23#include "AMDGPUGenGlobalISel.inc"
24#undef GET_GLOBALISEL_PREDICATE_BITSET
25#undef AMDGPUSubtarget
26}
27
28namespace llvm {
29
30namespace AMDGPU {
32}
33
38class GCNSubtarget;
39class MachineInstr;
41class MachineOperand;
43class RegisterBank;
44class SIInstrInfo;
45class SIRegisterInfo;
47
49private:
51 const GCNSubtarget *Subtarget;
52
53public:
55 const AMDGPURegisterBankInfo &RBI,
56 const AMDGPUTargetMachine &TM);
57
58 bool select(MachineInstr &I) override;
59 static const char *getName();
60
63 BlockFrequencyInfo *BFI) override;
64
65private:
66 struct GEPInfo {
69 int64_t Imm = 0;
70 };
71
72 bool isSGPR(Register Reg) const;
73
74 bool isInstrUniform(const MachineInstr &MI) const;
75 bool isVCC(Register Reg, const MachineRegisterInfo &MRI) const;
76
77 const RegisterBank *getArtifactRegBank(
79 const TargetRegisterInfo &TRI) const;
80
81 /// tblgen-erated 'select' implementation.
82 bool selectImpl(MachineInstr &I, CodeGenCoverage &CoverageInfo) const;
83
84 MachineOperand getSubOperand64(MachineOperand &MO,
85 const TargetRegisterClass &SubRC,
86 unsigned SubIdx) const;
87
88 bool constrainCopyLikeIntrin(MachineInstr &MI, unsigned NewOpc) const;
89 bool selectCOPY(MachineInstr &I) const;
90 bool selectCOPY_SCC_VCC(MachineInstr &I) const;
91 bool selectCOPY_VCC_SCC(MachineInstr &I) const;
92 bool selectReadAnyLane(MachineInstr &I) const;
93 bool selectPHI(MachineInstr &I) const;
94 bool selectG_TRUNC(MachineInstr &I) const;
95 bool selectG_SZA_EXT(MachineInstr &I) const;
96 bool selectG_FPEXT(MachineInstr &I) const;
97 bool selectG_FNEG(MachineInstr &I) const;
98 bool selectG_FABS(MachineInstr &I) const;
99 bool selectG_AND_OR_XOR(MachineInstr &I) const;
100 bool selectG_ADD_SUB(MachineInstr &I) const;
101 bool selectG_UADDO_USUBO_UADDE_USUBE(MachineInstr &I) const;
102 bool selectG_AMDGPU_MAD_64_32(MachineInstr &I) const;
103 bool selectG_EXTRACT(MachineInstr &I) const;
104 bool selectG_FMA_FMAD(MachineInstr &I) const;
105 bool selectG_MERGE_VALUES(MachineInstr &I) const;
106 bool selectG_UNMERGE_VALUES(MachineInstr &I) const;
107 bool selectG_BUILD_VECTOR(MachineInstr &I) const;
108 bool selectG_IMPLICIT_DEF(MachineInstr &I) const;
109 bool selectG_INSERT(MachineInstr &I) const;
110 bool selectG_SBFX_UBFX(MachineInstr &I) const;
111
112 bool selectInterpP1F16(MachineInstr &MI) const;
113 bool selectWritelane(MachineInstr &MI) const;
114 bool selectDivScale(MachineInstr &MI) const;
115 bool selectIntrinsicCmp(MachineInstr &MI) const;
116 bool selectBallot(MachineInstr &I) const;
117 bool selectRelocConstant(MachineInstr &I) const;
118 bool selectGroupStaticSize(MachineInstr &I) const;
119 bool selectReturnAddress(MachineInstr &I) const;
120 bool selectG_INTRINSIC(MachineInstr &I) const;
121
122 bool selectEndCfIntrinsic(MachineInstr &MI) const;
123 bool selectDSOrderedIntrinsic(MachineInstr &MI, Intrinsic::ID IID) const;
124 bool selectDSGWSIntrinsic(MachineInstr &MI, Intrinsic::ID IID) const;
125 bool selectDSAppendConsume(MachineInstr &MI, bool IsAppend) const;
126 bool selectInitWholeWave(MachineInstr &MI) const;
127 bool selectDSBvhStackIntrinsic(MachineInstr &MI) const;
128
129 bool selectImageIntrinsic(MachineInstr &MI,
130 const AMDGPU::ImageDimIntrinsicInfo *Intr) const;
131 bool selectG_INTRINSIC_W_SIDE_EFFECTS(MachineInstr &I) const;
132 int getS_CMPOpcode(CmpInst::Predicate P, unsigned Size) const;
133 bool selectG_ICMP_or_FCMP(MachineInstr &I) const;
134 bool hasVgprParts(ArrayRef<GEPInfo> AddrInfo) const;
135 void getAddrModeInfo(const MachineInstr &Load, const MachineRegisterInfo &MRI,
136 SmallVectorImpl<GEPInfo> &AddrInfo) const;
137
138 void initM0(MachineInstr &I) const;
139 bool selectG_LOAD_STORE_ATOMICRMW(MachineInstr &I) const;
140 bool selectG_SELECT(MachineInstr &I) const;
141 bool selectG_BRCOND(MachineInstr &I) const;
142 bool selectG_GLOBAL_VALUE(MachineInstr &I) const;
143 bool selectG_PTRMASK(MachineInstr &I) const;
144 bool selectG_EXTRACT_VECTOR_ELT(MachineInstr &I) const;
145 bool selectG_INSERT_VECTOR_ELT(MachineInstr &I) const;
146 bool selectBufferLoadLds(MachineInstr &MI) const;
147 bool selectGlobalLoadLds(MachineInstr &MI) const;
148 bool selectBVHIntersectRayIntrinsic(MachineInstr &I) const;
149 bool selectSMFMACIntrin(MachineInstr &I) const;
150 bool selectPermlaneSwapIntrin(MachineInstr &I, Intrinsic::ID IntrID) const;
151 bool selectWaveAddress(MachineInstr &I) const;
152 bool selectBITOP3(MachineInstr &I) const;
153 bool selectStackRestore(MachineInstr &MI) const;
154 bool selectNamedBarrierInit(MachineInstr &I, Intrinsic::ID IID) const;
155 bool selectNamedBarrierInst(MachineInstr &I, Intrinsic::ID IID) const;
156 bool selectSBarrierSignalIsfirst(MachineInstr &I, Intrinsic::ID IID) const;
157 bool selectSGetBarrierState(MachineInstr &I, Intrinsic::ID IID) const;
158 bool selectSBarrierLeave(MachineInstr &I) const;
159
160 std::pair<Register, unsigned> selectVOP3ModsImpl(Register Src,
161 bool IsCanonicalizing = true,
162 bool AllowAbs = true,
163 bool OpSel = false) const;
164
165 Register copyToVGPRIfSrcFolded(Register Src, unsigned Mods,
166 MachineOperand Root, MachineInstr *InsertPt,
167 bool ForceVGPR = false) const;
168
170 selectVCSRC(MachineOperand &Root) const;
171
173 selectVSRC0(MachineOperand &Root) const;
174
176 selectVOP3Mods0(MachineOperand &Root) const;
178 selectVOP3BMods0(MachineOperand &Root) const;
180 selectVOP3OMods(MachineOperand &Root) const;
182 selectVOP3Mods(MachineOperand &Root) const;
184 selectVOP3ModsNonCanonicalizing(MachineOperand &Root) const;
186 selectVOP3BMods(MachineOperand &Root) const;
187
188 ComplexRendererFns selectVOP3NoMods(MachineOperand &Root) const;
189
190 std::pair<Register, unsigned>
191 selectVOP3PModsImpl(Register RootReg, const MachineRegisterInfo &MRI,
192 bool IsDOT = false) const;
194 selectVOP3PRetHelper(MachineOperand &Root, bool IsDOT = false) const;
195
197 selectVOP3PMods(MachineOperand &Root) const;
198
200 selectVOP3PModsDOT(MachineOperand &Root) const;
201
203 selectWMMAOpSelVOP3PMods(MachineOperand &Root) const;
204
206 selectWMMAModsF32NegAbs(MachineOperand &Root) const;
208 selectWMMAModsF16Neg(MachineOperand &Root) const;
210 selectWMMAModsF16NegAbs(MachineOperand &Root) const;
212 selectWMMAVISrc(MachineOperand &Root) const;
214 selectSWMMACIndex8(MachineOperand &Root) const;
216 selectSWMMACIndex16(MachineOperand &Root) const;
218 selectSWMMACIndex32(MachineOperand &Root) const;
219
221 selectVOP3OpSelMods(MachineOperand &Root) const;
222
224 selectVINTERPMods(MachineOperand &Root) const;
226 selectVINTERPModsHi(MachineOperand &Root) const;
227
228 bool selectScaleOffset(MachineOperand &Root, Register &Offset,
229 bool IsSigned) const;
230 bool selectSmrdOffset(MachineOperand &Root, Register &Base, Register *SOffset,
231 int64_t *Offset, bool *ScaleOffset) const;
233 selectSmrdImm(MachineOperand &Root) const;
235 selectSmrdImm32(MachineOperand &Root) const;
237 selectSmrdSgpr(MachineOperand &Root) const;
239 selectSmrdSgprImm(MachineOperand &Root) const;
240
241 std::pair<Register, int> selectFlatOffsetImpl(MachineOperand &Root,
242 uint64_t FlatVariant) const;
243
245 selectFlatOffset(MachineOperand &Root) const;
247 selectGlobalOffset(MachineOperand &Root) const;
249 selectScratchOffset(MachineOperand &Root) const;
250
252 selectGlobalSAddr(MachineOperand &Root, unsigned CPolBits,
253 bool NeedIOffset = true) const;
255 selectGlobalSAddr(MachineOperand &Root) const;
257 selectGlobalSAddrCPol(MachineOperand &Root) const;
259 selectGlobalSAddrCPolM0(MachineOperand &Root) const;
261 selectGlobalSAddrGLC(MachineOperand &Root) const;
263 selectGlobalSAddrNoIOffset(MachineOperand &Root) const;
265 selectGlobalSAddrNoIOffsetM0(MachineOperand &Root) const;
266
268 selectScratchSAddr(MachineOperand &Root) const;
269 bool checkFlatScratchSVSSwizzleBug(Register VAddr, Register SAddr,
270 uint64_t ImmOffset) const;
272 selectScratchSVAddr(MachineOperand &Root) const;
273
275 selectMUBUFScratchOffen(MachineOperand &Root) const;
277 selectMUBUFScratchOffset(MachineOperand &Root) const;
278
279 bool isDSOffsetLegal(Register Base, int64_t Offset) const;
280 bool isDSOffset2Legal(Register Base, int64_t Offset0, int64_t Offset1,
281 unsigned Size) const;
282 bool isFlatScratchBaseLegal(Register Addr) const;
283 bool isFlatScratchBaseLegalSV(Register Addr) const;
284 bool isFlatScratchBaseLegalSVImm(Register Addr) const;
285
286 std::pair<Register, unsigned>
287 selectDS1Addr1OffsetImpl(MachineOperand &Root) const;
289 selectDS1Addr1Offset(MachineOperand &Root) const;
290
292 selectDS64Bit4ByteAligned(MachineOperand &Root) const;
293
295 selectDS128Bit8ByteAligned(MachineOperand &Root) const;
296
297 std::pair<Register, unsigned> selectDSReadWrite2Impl(MachineOperand &Root,
298 unsigned size) const;
300 selectDSReadWrite2(MachineOperand &Root, unsigned size) const;
301
302 std::tuple<Register, int64_t, bool>
303 getPtrBaseWithConstantOffset(Register Root,
304 const MachineRegisterInfo &MRI) const;
305
306 // Parse out a chain of up to two g_ptr_add instructions.
307 // g_ptr_add (n0, _)
308 // g_ptr_add (n0, (n1 = g_ptr_add n2, n3))
309 struct MUBUFAddressData {
310 Register N0, N2, N3;
311 int64_t Offset = 0;
312 };
313
314 bool shouldUseAddr64(MUBUFAddressData AddrData) const;
315
316 void splitIllegalMUBUFOffset(MachineIRBuilder &B,
317 Register &SOffset, int64_t &ImmOffset) const;
318
319 MUBUFAddressData parseMUBUFAddress(Register Src) const;
320
321 bool selectMUBUFAddr64Impl(MachineOperand &Root, Register &VAddr,
322 Register &RSrcReg, Register &SOffset,
323 int64_t &Offset) const;
324
325 bool selectMUBUFOffsetImpl(MachineOperand &Root, Register &RSrcReg,
326 Register &SOffset, int64_t &Offset) const;
327
329 selectBUFSOffset(MachineOperand &Root) const;
330
332 selectMUBUFAddr64(MachineOperand &Root) const;
333
335 selectMUBUFOffset(MachineOperand &Root) const;
336
337 ComplexRendererFns selectSMRDBufferImm(MachineOperand &Root) const;
338 ComplexRendererFns selectSMRDBufferImm32(MachineOperand &Root) const;
339 ComplexRendererFns selectSMRDBufferSgprImm(MachineOperand &Root) const;
340
341 std::pair<Register, unsigned> selectVOP3PMadMixModsImpl(MachineOperand &Root,
342 bool &Matched) const;
343 ComplexRendererFns selectVOP3PMadMixModsExt(MachineOperand &Root) const;
344 ComplexRendererFns selectVOP3PMadMixMods(MachineOperand &Root) const;
345
346 void renderTruncImm32(MachineInstrBuilder &MIB, const MachineInstr &MI,
347 int OpIdx = -1) const;
348
349 void renderTruncTImm(MachineInstrBuilder &MIB, const MachineInstr &MI,
350 int OpIdx) const;
351 void renderZextBoolTImm(MachineInstrBuilder &MIB, const MachineInstr &MI,
352 int OpIdx) const;
353
354 void renderOpSelTImm(MachineInstrBuilder &MIB, const MachineInstr &MI,
355 int OpIdx) const;
356
357 void renderSrcAndDstSelToOpSelXForm_0_0(MachineInstrBuilder &MIB,
358 const MachineInstr &MI,
359 int OpIdx) const;
360
361 void renderSrcAndDstSelToOpSelXForm_0_1(MachineInstrBuilder &MIB,
362 const MachineInstr &MI,
363 int OpIdx) const;
364
365 void renderSrcAndDstSelToOpSelXForm_1_0(MachineInstrBuilder &MIB,
366 const MachineInstr &MI,
367 int OpIdx) const;
368
369 void renderSrcAndDstSelToOpSelXForm_1_1(MachineInstrBuilder &MIB,
370 const MachineInstr &MI,
371 int OpIdx) const;
372
373 void renderDstSelToOpSelXForm(MachineInstrBuilder &MIB,
374 const MachineInstr &MI, int OpIdx) const;
375
376 void renderSrcSelToOpSelXForm(MachineInstrBuilder &MIB,
377 const MachineInstr &MI, int OpIdx) const;
378
379 void renderSrcAndDstSelToOpSelXForm_2_0(MachineInstrBuilder &MIB,
380 const MachineInstr &MI,
381 int OpIdx) const;
382
383 void renderDstSelToOpSel3XFormXForm(MachineInstrBuilder &MIB,
384 const MachineInstr &MI, int OpIdx) const;
385
386 void renderNegateImm(MachineInstrBuilder &MIB, const MachineInstr &MI,
387 int OpIdx) const;
388
389 void renderBitcastFPImm(MachineInstrBuilder &MIB, const MachineInstr &MI,
390 int OpIdx) const;
391
392 void renderBitcastFPImm32(MachineInstrBuilder &MIB, const MachineInstr &MI,
393 int OpIdx) const {
394 renderBitcastFPImm(MIB, MI, OpIdx);
395 }
396 void renderBitcastFPImm64(MachineInstrBuilder &MIB, const MachineInstr &MI,
397 int OpIdx) const {
398 renderBitcastFPImm(MIB, MI, OpIdx);
399 }
400
401 void renderPopcntImm(MachineInstrBuilder &MIB, const MachineInstr &MI,
402 int OpIdx) const;
403 void renderExtractCPol(MachineInstrBuilder &MIB, const MachineInstr &MI,
404 int OpIdx) const;
405 void renderExtractSWZ(MachineInstrBuilder &MIB, const MachineInstr &MI,
406 int OpIdx) const;
407 void renderExtractCpolSetGLC(MachineInstrBuilder &MIB, const MachineInstr &MI,
408 int OpIdx) const;
409
410 void renderFrameIndex(MachineInstrBuilder &MIB, const MachineInstr &MI,
411 int OpIdx) const;
412
413 void renderFPPow2ToExponent(MachineInstrBuilder &MIB, const MachineInstr &MI,
414 int OpIdx) const;
415
416 void renderRoundMode(MachineInstrBuilder &MIB, const MachineInstr &MI,
417 int OpIdx) const;
418
419 void renderVOP3PModsNeg(MachineInstrBuilder &MIB, const MachineInstr &MI,
420 int OpIdx) const;
421 void renderVOP3PModsNegs(MachineInstrBuilder &MIB, const MachineInstr &MI,
422 int OpIdx) const;
423 void renderVOP3PModsNegAbs(MachineInstrBuilder &MIB, const MachineInstr &MI,
424 int OpIdx) const;
425
426 void renderPrefetchLoc(MachineInstrBuilder &MIB, const MachineInstr &MI,
427 int OpIdx) const;
428
429 void renderScaledMAIIntrinsicOperand(MachineInstrBuilder &MIB,
430 const MachineInstr &MI, int OpIdx) const;
431
432 bool isInlineImmediate(const APInt &Imm) const;
433 bool isInlineImmediate(const APFloat &Imm) const;
434
435 // Returns true if TargetOpcode::G_AND MachineInstr `MI`'s masking of the
436 // shift amount operand's `ShAmtBits` bits is unneeded.
437 bool isUnneededShiftMask(const MachineInstr &MI, unsigned ShAmtBits) const;
438
439 /// Match a zero extend from a 32-bit value to 64-bits.
440 Register matchZeroExtendFromS32(Register Reg) const;
441 /// Match a sign extend from a 32-bit value to 64-bits.
442 Register matchSignExtendFromS32(Register Reg) const;
443 /// Match a zero extend from a 32-bit value to 64-bits, or \p Reg itself if it
444 /// is 32-bit.
445 Register matchZeroExtendFromS32OrS32(Register Reg) const;
446 /// Match a sign extend from a 32-bit value to 64-bits, or \p Reg itself if it
447 /// is 32-bit.
448 Register matchSignExtendFromS32OrS32(Register Reg) const;
449 /// Match either sign or zero extend depending on the \p IsSigned from a
450 /// 32-bit value to 64-bits, or \p Reg itself if it is 32-bit.
451 Register matchExtendFromS32OrS32(Register Reg, bool IsSigned) const;
452 /// Match an any extend from a 32-bit value to 64-bit.
453 Register matchAnyExtendFromS32(Register Reg) const;
454
455 const SIInstrInfo &TII;
456 const SIRegisterInfo &TRI;
457 const AMDGPURegisterBankInfo &RBI;
458 const AMDGPUTargetMachine &TM;
459 const GCNSubtarget &STI;
460#define GET_GLOBALISEL_PREDICATES_DECL
461#define AMDGPUSubtarget GCNSubtarget
462#include "AMDGPUGenGlobalISel.inc"
463#undef GET_GLOBALISEL_PREDICATES_DECL
464#undef AMDGPUSubtarget
465
466#define GET_GLOBALISEL_TEMPORARIES_DECL
467#include "AMDGPUGenGlobalISel.inc"
468#undef GET_GLOBALISEL_TEMPORARIES_DECL
469};
470
471} // End llvm namespace.
472#endif
unsigned const MachineRegisterInfo * MRI
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
IRTranslator LLVM IR MI
#define I(x, y, z)
Definition MD5.cpp:58
Register Reg
Register const TargetRegisterInfo * TRI
Promote Memory to Register
Definition Mem2Reg.cpp:110
MachineInstr unsigned OpIdx
#define P(N)
AMDGPUInstructionSelector(const GCNSubtarget &STI, const AMDGPURegisterBankInfo &RBI, const AMDGPUTargetMachine &TM)
static const char * getName()
bool select(MachineInstr &I) override
Select the (possibly generic) instruction I to only use target-specific opcodes.
void setupMF(MachineFunction &MF, GISelValueTracking *VT, CodeGenCoverage *CoverageInfo, ProfileSummaryInfo *PSI, BlockFrequencyInfo *BFI) override
Setup per-MF executor state.
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...
Definition ArrayRef.h:41
BlockFrequencyInfo pass uses BlockFrequencyInfoImpl implementation to estimate IR basic block frequen...
Predicate
This enumeration lists the possible predicates for CmpInst subclasses.
Definition InstrTypes.h:678
std::optional< SmallVector< std::function< void(MachineInstrBuilder &)>, 4 > > ComplexRendererFns
Helper class to build MachineInstr.
Representation of each machine instruction.
MachineOperand class - Representation of each machine instruction operand.
MachineRegisterInfo - Keep track of information for virtual and physical registers,...
Analysis providing profile information.
This class implements the register bank concept.
Wrapper class representing virtual and physical registers.
Definition Register.h:19
This class consists of common code factored out of the SmallVector class to reduce code duplication b...
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
This is an optimization pass for GlobalISel generic memory operations.
@ Offset
Definition DWP.cpp:477
auto size(R &&Range, std::enable_if_t< std::is_base_of< std::random_access_iterator_tag, typename std::iterator_traits< decltype(Range.begin())>::iterator_category >::value, void > *=nullptr)
Get the size of a range.
Definition STLExtras.h:1685