LLVM 23.0.0git
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 selectS16MergeToS32(MachineInstr &MI) const;
106 bool selectG_MERGE_VALUES(MachineInstr &I) const;
107 bool selectG_UNMERGE_VALUES(MachineInstr &I) const;
108 bool selectG_BUILD_VECTOR(MachineInstr &I) const;
109 bool selectG_IMPLICIT_DEF(MachineInstr &I) const;
110 bool selectG_INSERT(MachineInstr &I) const;
111 bool selectG_SBFX_UBFX(MachineInstr &I) const;
112
113 bool selectInterpP1F16(MachineInstr &MI) const;
114 bool selectWritelane(MachineInstr &MI) const;
115 bool selectDivScale(MachineInstr &MI) const;
116 bool selectIntrinsicCmp(MachineInstr &MI) const;
117 bool selectBallot(MachineInstr &I) const;
118 bool selectRelocConstant(MachineInstr &I) const;
119 bool selectGroupStaticSize(MachineInstr &I) const;
120 bool selectReturnAddress(MachineInstr &I) const;
121 bool selectG_INTRINSIC(MachineInstr &I) const;
122
123 bool selectEndCfIntrinsic(MachineInstr &MI) const;
124 bool selectDSOrderedIntrinsic(MachineInstr &MI, Intrinsic::ID IID) const;
125 bool selectDSGWSIntrinsic(MachineInstr &MI, Intrinsic::ID IID) const;
126 bool selectDSAppendConsume(MachineInstr &MI, bool IsAppend) const;
127 bool selectInitWholeWave(MachineInstr &MI) const;
128 bool selectDSBvhStackIntrinsic(MachineInstr &MI) const;
129
130 bool selectImageIntrinsic(MachineInstr &MI,
131 const AMDGPU::ImageDimIntrinsicInfo *Intr) const;
132 bool selectG_INTRINSIC_W_SIDE_EFFECTS(MachineInstr &I) const;
133 int getS_CMPOpcode(CmpInst::Predicate P, unsigned Size) const;
134 bool selectG_ICMP_or_FCMP(MachineInstr &I) const;
135 bool hasVgprParts(ArrayRef<GEPInfo> AddrInfo) const;
136 void getAddrModeInfo(const MachineInstr &Load, const MachineRegisterInfo &MRI,
137 SmallVectorImpl<GEPInfo> &AddrInfo) const;
138
139 void initM0(MachineInstr &I) const;
140 bool selectG_LOAD_STORE_ATOMICRMW(MachineInstr &I) const;
141 bool selectG_SELECT(MachineInstr &I) const;
142 bool selectG_BRCOND(MachineInstr &I) const;
143 bool selectG_GLOBAL_VALUE(MachineInstr &I) const;
144 bool selectG_PTRMASK(MachineInstr &I) const;
145 bool selectG_EXTRACT_VECTOR_ELT(MachineInstr &I) const;
146 bool selectG_INSERT_VECTOR_ELT(MachineInstr &I) const;
147 bool selectBufferLoadLds(MachineInstr &MI) const;
148 bool selectGlobalLoadLds(MachineInstr &MI) const;
149 bool selectTensorLoadStore(MachineInstr &MI, Intrinsic::ID IID) const;
150 bool selectBVHIntersectRayIntrinsic(MachineInstr &I) const;
151 bool selectSMFMACIntrin(MachineInstr &I) const;
152 bool selectPermlaneSwapIntrin(MachineInstr &I, Intrinsic::ID IntrID) const;
153 bool selectWaveAddress(MachineInstr &I) const;
154 bool selectBITOP3(MachineInstr &I) const;
155 bool selectStackRestore(MachineInstr &MI) const;
156 bool selectNamedBarrierInit(MachineInstr &I, Intrinsic::ID IID) const;
157 bool selectNamedBarrierInst(MachineInstr &I, Intrinsic::ID IID) const;
158 bool selectSBarrierSignalIsfirst(MachineInstr &I, Intrinsic::ID IID) const;
159 bool selectSGetBarrierState(MachineInstr &I, Intrinsic::ID IID) const;
160 bool selectSBarrierLeave(MachineInstr &I) const;
161 bool selectWaveShuffleIntrin(MachineInstr &I) const;
162
163 std::pair<Register, unsigned> selectVOP3ModsImpl(Register Src,
164 bool IsCanonicalizing = true,
165 bool AllowAbs = true,
166 bool OpSel = false) const;
167 std::pair<Register, unsigned> selectVOP3PModsF32Impl(Register Src) const;
168
169 Register copyToVGPRIfSrcFolded(Register Src, unsigned Mods,
170 MachineOperand Root, MachineInstr *InsertPt,
171 bool ForceVGPR = false) const;
172
174 selectVCSRC(MachineOperand &Root) const;
175
177 selectVSRC0(MachineOperand &Root) const;
178
180 selectVOP3Mods0(MachineOperand &Root) const;
182 selectVOP3BMods0(MachineOperand &Root) const;
184 selectVOP3OMods(MachineOperand &Root) const;
186 selectVOP3Mods(MachineOperand &Root) const;
188 selectVOP3ModsNonCanonicalizing(MachineOperand &Root) const;
190 selectVOP3BMods(MachineOperand &Root) const;
191
192 ComplexRendererFns selectVOP3NoMods(MachineOperand &Root) const;
193
194 std::pair<Register, unsigned>
195 selectVOP3PModsImpl(Register RootReg, const MachineRegisterInfo &MRI,
196 bool IsDOT = false) const;
198 selectVOP3PRetHelper(MachineOperand &Root, bool IsDOT = false) const;
199
201 selectVOP3PMods(MachineOperand &Root) const;
202
204 selectVOP3PModsDOT(MachineOperand &Root) const;
206 selectVOP3PNoModsDOT(MachineOperand &Root) const;
208 selectVOP3PModsF32(MachineOperand &Root) const;
210 selectVOP3PNoModsF32(MachineOperand &Root) const;
211
213 selectWMMAOpSelVOP3PMods(MachineOperand &Root) const;
214
216 selectWMMAModsF32NegAbs(MachineOperand &Root) const;
218 selectWMMAModsF16Neg(MachineOperand &Root) const;
220 selectWMMAModsF16NegAbs(MachineOperand &Root) const;
222 selectWMMAVISrc(MachineOperand &Root) const;
224 selectSWMMACIndex8(MachineOperand &Root) const;
226 selectSWMMACIndex16(MachineOperand &Root) const;
228 selectSWMMACIndex32(MachineOperand &Root) const;
229
231 selectVOP3OpSelMods(MachineOperand &Root) const;
232
234 selectVINTERPMods(MachineOperand &Root) const;
236 selectVINTERPModsHi(MachineOperand &Root) const;
237
238 bool selectScaleOffset(MachineOperand &Root, Register &Offset,
239 bool IsSigned) const;
240 bool selectSmrdOffset(MachineOperand &Root, Register &Base, Register *SOffset,
241 int64_t *Offset, bool *ScaleOffset) const;
243 selectSmrdImm(MachineOperand &Root) const;
245 selectSmrdImm32(MachineOperand &Root) const;
247 selectSmrdSgpr(MachineOperand &Root) const;
249 selectSmrdSgprImm(MachineOperand &Root) const;
250
251 std::pair<Register, int>
252 selectFlatOffsetImpl(MachineOperand &Root,
253 AMDGPU::FlatAddrSpace FlatVariant) const;
254
256 selectFlatOffset(MachineOperand &Root) const;
258 selectGlobalOffset(MachineOperand &Root) const;
260 selectScratchOffset(MachineOperand &Root) const;
261
263 selectGlobalSAddr(MachineOperand &Root, unsigned CPolBits,
264 bool NeedIOffset = true) const;
266 selectGlobalSAddr(MachineOperand &Root) const;
268 selectGlobalSAddrCPol(MachineOperand &Root) const;
270 selectGlobalSAddrCPolM0(MachineOperand &Root) const;
272 selectGlobalSAddrGLC(MachineOperand &Root) const;
274 selectGlobalSAddrNoIOffset(MachineOperand &Root) const;
276 selectGlobalSAddrNoIOffsetM0(MachineOperand &Root) const;
277
279 selectScratchSAddr(MachineOperand &Root) const;
280 bool checkFlatScratchSVSSwizzleBug(Register VAddr, Register SAddr,
281 uint64_t ImmOffset) const;
283 selectScratchSVAddr(MachineOperand &Root) const;
284
286 selectMUBUFScratchOffen(MachineOperand &Root) const;
288 selectMUBUFScratchOffset(MachineOperand &Root) const;
289
290 bool isDSOffsetLegal(Register Base, int64_t Offset) const;
291 bool isDSOffset2Legal(Register Base, int64_t Offset0, int64_t Offset1,
292 unsigned Size) const;
293 bool isFlatScratchBaseLegal(Register Addr) const;
294 bool isFlatScratchBaseLegalSV(Register Addr) const;
295 bool isFlatScratchBaseLegalSVImm(Register Addr) const;
296
297 std::pair<Register, unsigned>
298 selectDS1Addr1OffsetImpl(MachineOperand &Root) const;
300 selectDS1Addr1Offset(MachineOperand &Root) const;
301
303 selectDS64Bit4ByteAligned(MachineOperand &Root) const;
304
306 selectDS128Bit8ByteAligned(MachineOperand &Root) const;
307
308 std::pair<Register, unsigned> selectDSReadWrite2Impl(MachineOperand &Root,
309 unsigned size) const;
311 selectDSReadWrite2(MachineOperand &Root, unsigned size) const;
312
313 std::tuple<Register, int64_t, bool>
314 getPtrBaseWithConstantOffset(Register Root,
315 const MachineRegisterInfo &MRI) const;
316
317 // Parse out a chain of up to two g_ptr_add instructions.
318 // g_ptr_add (n0, _)
319 // g_ptr_add (n0, (n1 = g_ptr_add n2, n3))
320 struct MUBUFAddressData {
321 Register N0, N2, N3;
322 int64_t Offset = 0;
323 };
324
325 bool shouldUseAddr64(MUBUFAddressData AddrData) const;
326
327 void splitIllegalMUBUFOffset(MachineIRBuilder &B,
328 Register &SOffset, int64_t &ImmOffset) const;
329
330 MUBUFAddressData parseMUBUFAddress(Register Src) const;
331
332 bool selectMUBUFAddr64Impl(MachineOperand &Root, Register &VAddr,
333 Register &RSrcReg, Register &SOffset,
334 int64_t &Offset) const;
335
336 bool selectMUBUFOffsetImpl(MachineOperand &Root, Register &RSrcReg,
337 Register &SOffset, int64_t &Offset) const;
338
340 selectBUFSOffset(MachineOperand &Root) const;
341
343 selectMUBUFAddr64(MachineOperand &Root) const;
344
346 selectMUBUFOffset(MachineOperand &Root) const;
347
348 ComplexRendererFns selectSMRDBufferImm(MachineOperand &Root) const;
349 ComplexRendererFns selectSMRDBufferImm32(MachineOperand &Root) const;
350 ComplexRendererFns selectSMRDBufferSgprImm(MachineOperand &Root) const;
351
352 std::pair<Register, unsigned> selectVOP3PMadMixModsImpl(MachineOperand &Root,
353 bool &Matched) const;
354 ComplexRendererFns selectVOP3PMadMixModsExt(MachineOperand &Root) const;
355 ComplexRendererFns selectVOP3PMadMixMods(MachineOperand &Root) const;
356
357 void renderTruncImm32(MachineInstrBuilder &MIB, const MachineInstr &MI,
358 int OpIdx = -1) const;
359
360 void renderTruncTImm(MachineInstrBuilder &MIB, const MachineInstr &MI,
361 int OpIdx) const;
362 void renderZextBoolTImm(MachineInstrBuilder &MIB, const MachineInstr &MI,
363 int OpIdx) const;
364
365 void renderOpSelTImm(MachineInstrBuilder &MIB, const MachineInstr &MI,
366 int OpIdx) const;
367
368 void renderSrcAndDstSelToOpSelXForm_0_0(MachineInstrBuilder &MIB,
369 const MachineInstr &MI,
370 int OpIdx) const;
371
372 void renderSrcAndDstSelToOpSelXForm_0_1(MachineInstrBuilder &MIB,
373 const MachineInstr &MI,
374 int OpIdx) const;
375
376 void renderSrcAndDstSelToOpSelXForm_1_0(MachineInstrBuilder &MIB,
377 const MachineInstr &MI,
378 int OpIdx) const;
379
380 void renderSrcAndDstSelToOpSelXForm_1_1(MachineInstrBuilder &MIB,
381 const MachineInstr &MI,
382 int OpIdx) const;
383
384 void renderDstSelToOpSelXForm(MachineInstrBuilder &MIB,
385 const MachineInstr &MI, int OpIdx) const;
386
387 void renderSrcSelToOpSelXForm(MachineInstrBuilder &MIB,
388 const MachineInstr &MI, int OpIdx) const;
389
390 void renderSrcAndDstSelToOpSelXForm_2_0(MachineInstrBuilder &MIB,
391 const MachineInstr &MI,
392 int OpIdx) const;
393
394 void renderDstSelToOpSel3XFormXForm(MachineInstrBuilder &MIB,
395 const MachineInstr &MI, int OpIdx) const;
396
397 void renderNegateImm(MachineInstrBuilder &MIB, const MachineInstr &MI,
398 int OpIdx) const;
399
400 void renderBitcastFPImm(MachineInstrBuilder &MIB, const MachineInstr &MI,
401 int OpIdx) const;
402
403 void renderBitcastFPImm32(MachineInstrBuilder &MIB, const MachineInstr &MI,
404 int OpIdx) const {
405 renderBitcastFPImm(MIB, MI, OpIdx);
406 }
407 void renderBitcastFPImm64(MachineInstrBuilder &MIB, const MachineInstr &MI,
408 int OpIdx) const {
409 renderBitcastFPImm(MIB, MI, OpIdx);
410 }
411
412 void renderCountTrailingOnesImm(MachineInstrBuilder &MIB,
413 const MachineInstr &MI, int OpIdx) const;
414 void renderExtractCPol(MachineInstrBuilder &MIB, const MachineInstr &MI,
415 int OpIdx) const;
416 void renderExtractSWZ(MachineInstrBuilder &MIB, const MachineInstr &MI,
417 int OpIdx) const;
418 void renderExtractCpolSetGLC(MachineInstrBuilder &MIB, const MachineInstr &MI,
419 int OpIdx) const;
420
421 void renderFrameIndex(MachineInstrBuilder &MIB, const MachineInstr &MI,
422 int OpIdx) const;
423
424 void renderFPPow2ToExponent(MachineInstrBuilder &MIB, const MachineInstr &MI,
425 int OpIdx) const;
426
427 void renderRoundMode(MachineInstrBuilder &MIB, const MachineInstr &MI,
428 int OpIdx) const;
429
430 void renderVOP3PModsNeg(MachineInstrBuilder &MIB, const MachineInstr &MI,
431 int OpIdx) const;
432 void renderVOP3PModsNegs(MachineInstrBuilder &MIB, const MachineInstr &MI,
433 int OpIdx) const;
434 void renderVOP3PModsNegAbs(MachineInstrBuilder &MIB, const MachineInstr &MI,
435 int OpIdx) const;
436
437 void renderPrefetchLoc(MachineInstrBuilder &MIB, const MachineInstr &MI,
438 int OpIdx) const;
439
440 void renderScaledMAIIntrinsicOperand(MachineInstrBuilder &MIB,
441 const MachineInstr &MI, int OpIdx) const;
442
443 bool isInlineImmediate(const APInt &Imm) const;
444 bool isInlineImmediate(const APFloat &Imm) const;
445
446 // Returns true if TargetOpcode::G_AND MachineInstr `MI`'s masking of the
447 // shift amount operand's `ShAmtBits` bits is unneeded.
448 bool isUnneededShiftMask(const MachineInstr &MI, unsigned ShAmtBits) const;
449
450 /// Match a zero extend from a 32-bit value to 64-bits.
451 Register matchZeroExtendFromS32(Register Reg) const;
452 /// Match a sign extend from a 32-bit value to 64-bits.
453 Register matchSignExtendFromS32(Register Reg) const;
454 /// Match a zero extend from a 32-bit value to 64-bits, or \p Reg itself if it
455 /// is 32-bit.
456 Register matchZeroExtendFromS32OrS32(Register Reg) const;
457 /// Match a sign extend from a 32-bit value to 64-bits, or \p Reg itself if it
458 /// is 32-bit.
459 Register matchSignExtendFromS32OrS32(Register Reg) const;
460 /// Match either sign or zero extend depending on the \p IsSigned from a
461 /// 32-bit value to 64-bits, or \p Reg itself if it is 32-bit.
462 Register matchExtendFromS32OrS32(Register Reg, bool IsSigned) const;
463 /// Match an any extend from a 32-bit value to 64-bit.
464 Register matchAnyExtendFromS32(Register Reg) const;
465
466 const SIInstrInfo &TII;
467 const SIRegisterInfo &TRI;
468 const AMDGPURegisterBankInfo &RBI;
469 const AMDGPUTargetMachine &TM;
470 const GCNSubtarget &STI;
471#define GET_GLOBALISEL_PREDICATES_DECL
472#define AMDGPUSubtarget GCNSubtarget
473#include "AMDGPUGenGlobalISel.inc"
474#undef GET_GLOBALISEL_PREDICATES_DECL
475#undef AMDGPUSubtarget
476
477#define GET_GLOBALISEL_TEMPORARIES_DECL
478#include "AMDGPUGenGlobalISel.inc"
479#undef GET_GLOBALISEL_TEMPORARIES_DECL
480};
481
482} // End llvm namespace.
483#endif
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
IRTranslator LLVM IR MI
#define I(x, y, z)
Definition MD5.cpp:57
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.
Represent a constant reference to an array (0 or more elements consecutively in memory),...
Definition ArrayRef.h:40
BlockFrequencyInfo pass uses BlockFrequencyInfoImpl implementation to estimate IR basic block frequen...
Predicate
This enumeration lists the possible predicates for CmpInst subclasses.
Definition InstrTypes.h:740
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:20
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:558
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:1668