1 //===-- AMDGPUTargetMachine.cpp - TargetMachine for hw codegen targets-----===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief The AMDGPU target machine contains all of the hardware specific
12 /// information needed to emit code for R600 and SI GPUs.
14 //===----------------------------------------------------------------------===//
16 #include "AMDGPUTargetMachine.h"
18 #include "AMDGPUAliasAnalysis.h"
19 #include "AMDGPUCallLowering.h"
20 #include "AMDGPUInstructionSelector.h"
21 #include "AMDGPULegalizerInfo.h"
22 #ifdef LLVM_BUILD_GLOBAL_ISEL
23 #include "AMDGPURegisterBankInfo.h"
25 #include "AMDGPUTargetObjectFile.h"
26 #include "AMDGPUTargetTransformInfo.h"
27 #include "GCNIterativeScheduler.h"
28 #include "GCNSchedStrategy.h"
29 #include "R600MachineScheduler.h"
30 #include "SIMachineScheduler.h"
31 #include "llvm/CodeGen/GlobalISel/IRTranslator.h"
32 #include "llvm/CodeGen/GlobalISel/InstructionSelect.h"
33 #include "llvm/CodeGen/GlobalISel/Legalizer.h"
34 #include "llvm/CodeGen/GlobalISel/RegBankSelect.h"
35 #include "llvm/CodeGen/Passes.h"
36 #include "llvm/CodeGen/TargetPassConfig.h"
37 #include "llvm/IR/Attributes.h"
38 #include "llvm/IR/Function.h"
39 #include "llvm/IR/LegacyPassManager.h"
40 #include "llvm/Pass.h"
41 #include "llvm/Support/CommandLine.h"
42 #include "llvm/Support/Compiler.h"
43 #include "llvm/Support/TargetRegistry.h"
44 #include "llvm/Target/TargetLoweringObjectFile.h"
45 #include "llvm/Transforms/IPO.h"
46 #include "llvm/Transforms/IPO/AlwaysInliner.h"
47 #include "llvm/Transforms/IPO/PassManagerBuilder.h"
48 #include "llvm/Transforms/Scalar.h"
49 #include "llvm/Transforms/Scalar/GVN.h"
50 #include "llvm/Transforms/Vectorize.h"
55 static cl::opt<bool> EnableR600StructurizeCFG(
56 "r600-ir-structurize",
57 cl::desc("Use StructurizeCFG IR pass"),
60 static cl::opt<bool> EnableSROA(
62 cl::desc("Run SROA after promote alloca pass"),
67 EnableEarlyIfConversion("amdgpu-early-ifcvt", cl::Hidden,
68 cl::desc("Run early if-conversion"),
71 static cl::opt<bool> EnableR600IfConvert(
73 cl::desc("Use if conversion pass"),
77 // Option to disable vectorizer for tests.
78 static cl::opt<bool> EnableLoadStoreVectorizer(
79 "amdgpu-load-store-vectorizer",
80 cl::desc("Enable load store vectorizer"),
84 // Option to to control global loads scalarization
85 static cl::opt<bool> ScalarizeGlobal(
86 "amdgpu-scalarize-global-loads",
87 cl::desc("Enable global load scalarization"),
91 // Option to run internalize pass.
92 static cl::opt<bool> InternalizeSymbols(
93 "amdgpu-internalize-symbols",
94 cl::desc("Enable elimination of non-kernel functions and unused globals"),
98 // Option to inline all early.
99 static cl::opt<bool> EarlyInlineAll(
100 "amdgpu-early-inline-all",
101 cl::desc("Inline all functions early"),
105 static cl::opt<bool> EnableSDWAPeephole(
106 "amdgpu-sdwa-peephole",
107 cl::desc("Enable SDWA peepholer"),
110 // Enable address space based alias analysis
111 static cl::opt<bool> EnableAMDGPUAliasAnalysis("enable-amdgpu-aa", cl::Hidden,
112 cl::desc("Enable AMDGPU Alias Analysis"),
115 // Option to enable new waitcnt insertion pass.
116 static cl::opt<bool> EnableSIInsertWaitcntsPass(
117 "enable-si-insert-waitcnts",
118 cl::desc("Use new waitcnt insertion pass"),
121 // Option to run late CFG structurizer
122 static cl::opt<bool> LateCFGStructurize(
123 "amdgpu-late-structurize",
124 cl::desc("Enable late CFG structurization"),
128 extern "C" void LLVMInitializeAMDGPUTarget() {
129 // Register the target
130 RegisterTargetMachine<R600TargetMachine> X(getTheAMDGPUTarget());
131 RegisterTargetMachine<GCNTargetMachine> Y(getTheGCNTarget());
133 PassRegistry *PR = PassRegistry::getPassRegistry();
134 initializeSILowerI1CopiesPass(*PR);
135 initializeSIFixSGPRCopiesPass(*PR);
136 initializeSIFixVGPRCopiesPass(*PR);
137 initializeSIFoldOperandsPass(*PR);
138 initializeSIPeepholeSDWAPass(*PR);
139 initializeSIShrinkInstructionsPass(*PR);
140 initializeSIFixControlFlowLiveIntervalsPass(*PR);
141 initializeSILoadStoreOptimizerPass(*PR);
142 initializeAMDGPUAlwaysInlinePass(*PR);
143 initializeAMDGPUAnnotateKernelFeaturesPass(*PR);
144 initializeAMDGPUAnnotateUniformValuesPass(*PR);
145 initializeAMDGPULowerIntrinsicsPass(*PR);
146 initializeAMDGPUPromoteAllocaPass(*PR);
147 initializeAMDGPUCodeGenPreparePass(*PR);
148 initializeAMDGPUUnifyMetadataPass(*PR);
149 initializeSIAnnotateControlFlowPass(*PR);
150 initializeSIInsertWaitsPass(*PR);
151 initializeSIInsertWaitcntsPass(*PR);
152 initializeSIWholeQuadModePass(*PR);
153 initializeSILowerControlFlowPass(*PR);
154 initializeSIInsertSkipsPass(*PR);
155 initializeSIDebuggerInsertNopsPass(*PR);
156 initializeSIOptimizeExecMaskingPass(*PR);
157 initializeAMDGPUUnifyDivergentExitNodesPass(*PR);
158 initializeAMDGPUAAWrapperPassPass(*PR);
161 static std::unique_ptr<TargetLoweringObjectFile> createTLOF(const Triple &TT) {
162 return llvm::make_unique<AMDGPUTargetObjectFile>();
165 static ScheduleDAGInstrs *createR600MachineScheduler(MachineSchedContext *C) {
166 return new ScheduleDAGMILive(C, llvm::make_unique<R600SchedStrategy>());
169 static ScheduleDAGInstrs *createSIMachineScheduler(MachineSchedContext *C) {
170 return new SIScheduleDAGMI(C);
173 static ScheduleDAGInstrs *
174 createGCNMaxOccupancyMachineScheduler(MachineSchedContext *C) {
175 ScheduleDAGMILive *DAG =
176 new GCNScheduleDAGMILive(C, make_unique<GCNMaxOccupancySchedStrategy>(C));
177 DAG->addMutation(createLoadClusterDAGMutation(DAG->TII, DAG->TRI));
178 DAG->addMutation(createStoreClusterDAGMutation(DAG->TII, DAG->TRI));
182 static ScheduleDAGInstrs *
183 createIterativeGCNMaxOccupancyMachineScheduler(MachineSchedContext *C) {
184 auto DAG = new GCNIterativeScheduler(C,
185 GCNIterativeScheduler::SCHEDULE_LEGACYMAXOCCUPANCY);
186 DAG->addMutation(createLoadClusterDAGMutation(DAG->TII, DAG->TRI));
187 DAG->addMutation(createStoreClusterDAGMutation(DAG->TII, DAG->TRI));
191 static ScheduleDAGInstrs *createMinRegScheduler(MachineSchedContext *C) {
192 return new GCNIterativeScheduler(C,
193 GCNIterativeScheduler::SCHEDULE_MINREGFORCED);
196 static MachineSchedRegistry
197 R600SchedRegistry("r600", "Run R600's custom scheduler",
198 createR600MachineScheduler);
200 static MachineSchedRegistry
201 SISchedRegistry("si", "Run SI's custom scheduler",
202 createSIMachineScheduler);
204 static MachineSchedRegistry
205 GCNMaxOccupancySchedRegistry("gcn-max-occupancy",
206 "Run GCN scheduler to maximize occupancy",
207 createGCNMaxOccupancyMachineScheduler);
209 static MachineSchedRegistry
210 IterativeGCNMaxOccupancySchedRegistry("gcn-max-occupancy-experimental",
211 "Run GCN scheduler to maximize occupancy (experimental)",
212 createIterativeGCNMaxOccupancyMachineScheduler);
214 static MachineSchedRegistry
215 GCNMinRegSchedRegistry("gcn-minreg",
216 "Run GCN iterative scheduler for minimal register usage (experimental)",
217 createMinRegScheduler);
219 static StringRef computeDataLayout(const Triple &TT) {
220 if (TT.getArch() == Triple::r600) {
222 return "e-p:32:32-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128"
223 "-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64";
226 // 32-bit private, local, and region pointers. 64-bit global, constant and
228 if (TT.getEnvironmentName() == "amdgiz" ||
229 TT.getEnvironmentName() == "amdgizcl")
230 return "e-p:64:64-p1:64:64-p2:64:64-p3:32:32-p4:32:32-p5:32:32"
231 "-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128"
232 "-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64-A5";
233 return "e-p:32:32-p1:64:64-p2:64:64-p3:32:32-p4:64:64-p5:32:32"
234 "-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128"
235 "-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64";
239 static StringRef getGPUOrDefault(const Triple &TT, StringRef GPU) {
243 // HSA only supports CI+, so change the default GPU to a CI for HSA.
244 if (TT.getArch() == Triple::amdgcn)
245 return (TT.getOS() == Triple::AMDHSA) ? "kaveri" : "tahiti";
250 static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
251 // The AMDGPU toolchain only supports generating shared objects, so we
252 // must always use PIC.
256 AMDGPUTargetMachine::AMDGPUTargetMachine(const Target &T, const Triple &TT,
257 StringRef CPU, StringRef FS,
258 TargetOptions Options,
259 Optional<Reloc::Model> RM,
261 CodeGenOpt::Level OptLevel)
262 : LLVMTargetMachine(T, computeDataLayout(TT), TT, getGPUOrDefault(TT, CPU),
263 FS, Options, getEffectiveRelocModel(RM), CM, OptLevel),
264 TLOF(createTLOF(getTargetTriple())) {
265 AS = AMDGPU::getAMDGPUAS(TT);
269 AMDGPUTargetMachine::~AMDGPUTargetMachine() = default;
271 StringRef AMDGPUTargetMachine::getGPUName(const Function &F) const {
272 Attribute GPUAttr = F.getFnAttribute("target-cpu");
273 return GPUAttr.hasAttribute(Attribute::None) ?
274 getTargetCPU() : GPUAttr.getValueAsString();
277 StringRef AMDGPUTargetMachine::getFeatureString(const Function &F) const {
278 Attribute FSAttr = F.getFnAttribute("target-features");
280 return FSAttr.hasAttribute(Attribute::None) ?
281 getTargetFeatureString() :
282 FSAttr.getValueAsString();
285 static ImmutablePass *createAMDGPUExternalAAWrapperPass() {
286 return createExternalAAWrapperPass([](Pass &P, Function &, AAResults &AAR) {
287 if (auto *WrapperPass = P.getAnalysisIfAvailable<AMDGPUAAWrapperPass>())
288 AAR.addAAResult(WrapperPass->getResult());
292 void AMDGPUTargetMachine::adjustPassManager(PassManagerBuilder &Builder) {
293 Builder.DivergentTarget = true;
295 bool Internalize = InternalizeSymbols &&
296 (getOptLevel() > CodeGenOpt::None) &&
297 (getTargetTriple().getArch() == Triple::amdgcn);
298 bool EarlyInline = EarlyInlineAll &&
299 (getOptLevel() > CodeGenOpt::None);
300 bool AMDGPUAA = EnableAMDGPUAliasAnalysis && getOptLevel() > CodeGenOpt::None;
302 Builder.addExtension(
303 PassManagerBuilder::EP_ModuleOptimizerEarly,
304 [Internalize, EarlyInline, AMDGPUAA](const PassManagerBuilder &,
305 legacy::PassManagerBase &PM) {
307 PM.add(createAMDGPUAAWrapperPass());
308 PM.add(createAMDGPUExternalAAWrapperPass());
310 PM.add(createAMDGPUUnifyMetadataPass());
312 PM.add(createInternalizePass([=](const GlobalValue &GV) -> bool {
313 if (const Function *F = dyn_cast<Function>(&GV)) {
314 if (F->isDeclaration())
316 switch (F->getCallingConv()) {
319 case CallingConv::AMDGPU_VS:
320 case CallingConv::AMDGPU_HS:
321 case CallingConv::AMDGPU_GS:
322 case CallingConv::AMDGPU_PS:
323 case CallingConv::AMDGPU_CS:
324 case CallingConv::AMDGPU_KERNEL:
325 case CallingConv::SPIR_KERNEL:
329 return !GV.use_empty();
331 PM.add(createGlobalDCEPass());
334 PM.add(createAMDGPUAlwaysInlinePass(false));
337 Builder.addExtension(
338 PassManagerBuilder::EP_EarlyAsPossible,
339 [AMDGPUAA](const PassManagerBuilder &, legacy::PassManagerBase &PM) {
341 PM.add(createAMDGPUAAWrapperPass());
342 PM.add(createAMDGPUExternalAAWrapperPass());
347 //===----------------------------------------------------------------------===//
348 // R600 Target Machine (R600 -> Cayman)
349 //===----------------------------------------------------------------------===//
351 R600TargetMachine::R600TargetMachine(const Target &T, const Triple &TT,
352 StringRef CPU, StringRef FS,
353 TargetOptions Options,
354 Optional<Reloc::Model> RM,
355 CodeModel::Model CM, CodeGenOpt::Level OL)
356 : AMDGPUTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL) {
357 setRequiresStructuredCFG(true);
360 const R600Subtarget *R600TargetMachine::getSubtargetImpl(
361 const Function &F) const {
362 StringRef GPU = getGPUName(F);
363 StringRef FS = getFeatureString(F);
365 SmallString<128> SubtargetKey(GPU);
366 SubtargetKey.append(FS);
368 auto &I = SubtargetMap[SubtargetKey];
370 // This needs to be done before we create a new subtarget since any
371 // creation will depend on the TM and the code generation flags on the
372 // function that reside in TargetOptions.
373 resetTargetOptions(F);
374 I = llvm::make_unique<R600Subtarget>(TargetTriple, GPU, FS, *this);
380 //===----------------------------------------------------------------------===//
381 // GCN Target Machine (SI+)
382 //===----------------------------------------------------------------------===//
384 #ifdef LLVM_BUILD_GLOBAL_ISEL
387 struct SIGISelActualAccessor : public GISelAccessor {
388 std::unique_ptr<AMDGPUCallLowering> CallLoweringInfo;
389 std::unique_ptr<InstructionSelector> InstSelector;
390 std::unique_ptr<LegalizerInfo> Legalizer;
391 std::unique_ptr<RegisterBankInfo> RegBankInfo;
392 const AMDGPUCallLowering *getCallLowering() const override {
393 return CallLoweringInfo.get();
395 const InstructionSelector *getInstructionSelector() const override {
396 return InstSelector.get();
398 const LegalizerInfo *getLegalizerInfo() const override {
399 return Legalizer.get();
401 const RegisterBankInfo *getRegBankInfo() const override {
402 return RegBankInfo.get();
406 } // end anonymous namespace
409 GCNTargetMachine::GCNTargetMachine(const Target &T, const Triple &TT,
410 StringRef CPU, StringRef FS,
411 TargetOptions Options,
412 Optional<Reloc::Model> RM,
413 CodeModel::Model CM, CodeGenOpt::Level OL)
414 : AMDGPUTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL) {}
416 const SISubtarget *GCNTargetMachine::getSubtargetImpl(const Function &F) const {
417 StringRef GPU = getGPUName(F);
418 StringRef FS = getFeatureString(F);
420 SmallString<128> SubtargetKey(GPU);
421 SubtargetKey.append(FS);
423 auto &I = SubtargetMap[SubtargetKey];
425 // This needs to be done before we create a new subtarget since any
426 // creation will depend on the TM and the code generation flags on the
427 // function that reside in TargetOptions.
428 resetTargetOptions(F);
429 I = llvm::make_unique<SISubtarget>(TargetTriple, GPU, FS, *this);
431 #ifndef LLVM_BUILD_GLOBAL_ISEL
432 GISelAccessor *GISel = new GISelAccessor();
434 SIGISelActualAccessor *GISel = new SIGISelActualAccessor();
435 GISel->CallLoweringInfo.reset(
436 new AMDGPUCallLowering(*I->getTargetLowering()));
437 GISel->Legalizer.reset(new AMDGPULegalizerInfo());
439 GISel->RegBankInfo.reset(new AMDGPURegisterBankInfo(*I->getRegisterInfo()));
440 GISel->InstSelector.reset(new AMDGPUInstructionSelector(*I,
441 *static_cast<AMDGPURegisterBankInfo*>(GISel->RegBankInfo.get())));
444 I->setGISelAccessor(*GISel);
447 I->setScalarizeGlobalBehavior(ScalarizeGlobal);
452 //===----------------------------------------------------------------------===//
454 //===----------------------------------------------------------------------===//
458 class AMDGPUPassConfig : public TargetPassConfig {
460 AMDGPUPassConfig(LLVMTargetMachine &TM, PassManagerBase &PM)
461 : TargetPassConfig(TM, PM) {
462 // Exceptions and StackMaps are not supported, so these passes will never do
464 disablePass(&StackMapLivenessID);
465 disablePass(&FuncletLayoutID);
468 AMDGPUTargetMachine &getAMDGPUTargetMachine() const {
469 return getTM<AMDGPUTargetMachine>();
473 createMachineScheduler(MachineSchedContext *C) const override {
474 ScheduleDAGMILive *DAG = createGenericSchedLive(C);
475 DAG->addMutation(createLoadClusterDAGMutation(DAG->TII, DAG->TRI));
476 DAG->addMutation(createStoreClusterDAGMutation(DAG->TII, DAG->TRI));
480 void addEarlyCSEOrGVNPass();
481 void addStraightLineScalarOptimizationPasses();
482 void addIRPasses() override;
483 void addCodeGenPrepare() override;
484 bool addPreISel() override;
485 bool addInstSelector() override;
486 bool addGCPasses() override;
489 class R600PassConfig final : public AMDGPUPassConfig {
491 R600PassConfig(LLVMTargetMachine &TM, PassManagerBase &PM)
492 : AMDGPUPassConfig(TM, PM) {}
494 ScheduleDAGInstrs *createMachineScheduler(
495 MachineSchedContext *C) const override {
496 return createR600MachineScheduler(C);
499 bool addPreISel() override;
500 void addPreRegAlloc() override;
501 void addPreSched2() override;
502 void addPreEmitPass() override;
505 class GCNPassConfig final : public AMDGPUPassConfig {
507 GCNPassConfig(LLVMTargetMachine &TM, PassManagerBase &PM)
508 : AMDGPUPassConfig(TM, PM) {}
510 GCNTargetMachine &getGCNTargetMachine() const {
511 return getTM<GCNTargetMachine>();
515 createMachineScheduler(MachineSchedContext *C) const override;
517 bool addPreISel() override;
518 void addMachineSSAOptimization() override;
519 bool addILPOpts() override;
520 bool addInstSelector() override;
521 #ifdef LLVM_BUILD_GLOBAL_ISEL
522 bool addIRTranslator() override;
523 bool addLegalizeMachineIR() override;
524 bool addRegBankSelect() override;
525 bool addGlobalInstructionSelect() override;
527 void addFastRegAlloc(FunctionPass *RegAllocPass) override;
528 void addOptimizedRegAlloc(FunctionPass *RegAllocPass) override;
529 void addPreRegAlloc() override;
530 void addPostRegAlloc() override;
531 void addPreSched2() override;
532 void addPreEmitPass() override;
535 } // end anonymous namespace
537 TargetIRAnalysis AMDGPUTargetMachine::getTargetIRAnalysis() {
538 return TargetIRAnalysis([this](const Function &F) {
539 return TargetTransformInfo(AMDGPUTTIImpl(this, F));
543 void AMDGPUPassConfig::addEarlyCSEOrGVNPass() {
544 if (getOptLevel() == CodeGenOpt::Aggressive)
545 addPass(createGVNPass());
547 addPass(createEarlyCSEPass());
550 void AMDGPUPassConfig::addStraightLineScalarOptimizationPasses() {
551 addPass(createSeparateConstOffsetFromGEPPass());
552 addPass(createSpeculativeExecutionPass());
553 // ReassociateGEPs exposes more opportunites for SLSR. See
554 // the example in reassociate-geps-and-slsr.ll.
555 addPass(createStraightLineStrengthReducePass());
556 // SeparateConstOffsetFromGEP and SLSR creates common expressions which GVN or
557 // EarlyCSE can reuse.
558 addEarlyCSEOrGVNPass();
559 // Run NaryReassociate after EarlyCSE/GVN to be more effective.
560 addPass(createNaryReassociatePass());
561 // NaryReassociate on GEPs creates redundant common expressions, so run
562 // EarlyCSE after it.
563 addPass(createEarlyCSEPass());
566 void AMDGPUPassConfig::addIRPasses() {
567 const AMDGPUTargetMachine &TM = getAMDGPUTargetMachine();
569 // There is no reason to run these.
570 disablePass(&StackMapLivenessID);
571 disablePass(&FuncletLayoutID);
572 disablePass(&PatchableFunctionID);
574 addPass(createAMDGPULowerIntrinsicsPass());
576 // Function calls are not supported, so make sure we inline everything.
577 addPass(createAMDGPUAlwaysInlinePass());
578 addPass(createAlwaysInlinerLegacyPass());
579 // We need to add the barrier noop pass, otherwise adding the function
580 // inlining pass will cause all of the PassConfigs passes to be run
581 // one function at a time, which means if we have a nodule with two
582 // functions, then we will generate code for the first function
583 // without ever running any passes on the second.
584 addPass(createBarrierNoopPass());
586 if (TM.getTargetTriple().getArch() == Triple::amdgcn) {
587 // TODO: May want to move later or split into an early and late one.
589 addPass(createAMDGPUCodeGenPreparePass());
592 // Handle uses of OpenCL image2d_t, image3d_t and sampler_t arguments.
593 addPass(createAMDGPUOpenCLImageTypeLoweringPass());
595 if (TM.getOptLevel() > CodeGenOpt::None) {
596 addPass(createInferAddressSpacesPass());
597 addPass(createAMDGPUPromoteAlloca());
600 addPass(createSROAPass());
602 addStraightLineScalarOptimizationPasses();
604 if (EnableAMDGPUAliasAnalysis) {
605 addPass(createAMDGPUAAWrapperPass());
606 addPass(createExternalAAWrapperPass([](Pass &P, Function &,
608 if (auto *WrapperPass = P.getAnalysisIfAvailable<AMDGPUAAWrapperPass>())
609 AAR.addAAResult(WrapperPass->getResult());
614 TargetPassConfig::addIRPasses();
616 // EarlyCSE is not always strong enough to clean up what LSR produces. For
617 // example, GVN can combine
624 // %0 = shl nsw %a, 2
627 // but EarlyCSE can do neither of them.
628 if (getOptLevel() != CodeGenOpt::None)
629 addEarlyCSEOrGVNPass();
632 void AMDGPUPassConfig::addCodeGenPrepare() {
633 TargetPassConfig::addCodeGenPrepare();
635 if (EnableLoadStoreVectorizer)
636 addPass(createLoadStoreVectorizerPass());
639 bool AMDGPUPassConfig::addPreISel() {
640 addPass(createFlattenCFGPass());
644 bool AMDGPUPassConfig::addInstSelector() {
645 addPass(createAMDGPUISelDag(getAMDGPUTargetMachine(), getOptLevel()));
649 bool AMDGPUPassConfig::addGCPasses() {
650 // Do nothing. GC is not supported.
654 //===----------------------------------------------------------------------===//
656 //===----------------------------------------------------------------------===//
658 bool R600PassConfig::addPreISel() {
659 AMDGPUPassConfig::addPreISel();
661 if (EnableR600StructurizeCFG)
662 addPass(createStructurizeCFGPass());
666 void R600PassConfig::addPreRegAlloc() {
667 addPass(createR600VectorRegMerger());
670 void R600PassConfig::addPreSched2() {
671 addPass(createR600EmitClauseMarkers(), false);
672 if (EnableR600IfConvert)
673 addPass(&IfConverterID, false);
674 addPass(createR600ClauseMergePass(), false);
677 void R600PassConfig::addPreEmitPass() {
678 addPass(createAMDGPUCFGStructurizerPass(), false);
679 addPass(createR600ExpandSpecialInstrsPass(), false);
680 addPass(&FinalizeMachineBundlesID, false);
681 addPass(createR600Packetizer(), false);
682 addPass(createR600ControlFlowFinalizer(), false);
685 TargetPassConfig *R600TargetMachine::createPassConfig(PassManagerBase &PM) {
686 return new R600PassConfig(*this, PM);
689 //===----------------------------------------------------------------------===//
691 //===----------------------------------------------------------------------===//
693 ScheduleDAGInstrs *GCNPassConfig::createMachineScheduler(
694 MachineSchedContext *C) const {
695 const SISubtarget &ST = C->MF->getSubtarget<SISubtarget>();
696 if (ST.enableSIScheduler())
697 return createSIMachineScheduler(C);
698 return createGCNMaxOccupancyMachineScheduler(C);
701 bool GCNPassConfig::addPreISel() {
702 AMDGPUPassConfig::addPreISel();
704 // FIXME: We need to run a pass to propagate the attributes when calls are
706 addPass(createAMDGPUAnnotateKernelFeaturesPass());
708 // Merge divergent exit nodes. StructurizeCFG won't recognize the multi-exit
709 // regions formed by them.
710 addPass(&AMDGPUUnifyDivergentExitNodesID);
711 if (!LateCFGStructurize) {
712 addPass(createStructurizeCFGPass(true)); // true -> SkipUniformRegions
714 addPass(createSinkingPass());
715 addPass(createSITypeRewriter());
716 addPass(createAMDGPUAnnotateUniformValues());
717 if (!LateCFGStructurize) {
718 addPass(createSIAnnotateControlFlowPass());
724 void GCNPassConfig::addMachineSSAOptimization() {
725 TargetPassConfig::addMachineSSAOptimization();
727 // We want to fold operands after PeepholeOptimizer has run (or as part of
728 // it), because it will eliminate extra copies making it easier to fold the
729 // real source operand. We want to eliminate dead instructions after, so that
730 // we see fewer uses of the copies. We then need to clean up the dead
731 // instructions leftover after the operands are folded as well.
733 // XXX - Can we get away without running DeadMachineInstructionElim again?
734 addPass(&SIFoldOperandsID);
735 addPass(&DeadMachineInstructionElimID);
736 addPass(&SILoadStoreOptimizerID);
737 if (EnableSDWAPeephole) {
738 addPass(&SIPeepholeSDWAID);
739 addPass(&MachineLICMID);
740 addPass(&MachineCSEID);
741 addPass(&SIFoldOperandsID);
742 addPass(&DeadMachineInstructionElimID);
744 addPass(createSIShrinkInstructionsPass());
747 bool GCNPassConfig::addILPOpts() {
748 if (EnableEarlyIfConversion)
749 addPass(&EarlyIfConverterID);
751 TargetPassConfig::addILPOpts();
755 bool GCNPassConfig::addInstSelector() {
756 AMDGPUPassConfig::addInstSelector();
757 addPass(createSILowerI1CopiesPass());
758 addPass(&SIFixSGPRCopiesID);
762 #ifdef LLVM_BUILD_GLOBAL_ISEL
763 bool GCNPassConfig::addIRTranslator() {
764 addPass(new IRTranslator());
768 bool GCNPassConfig::addLegalizeMachineIR() {
769 addPass(new Legalizer());
773 bool GCNPassConfig::addRegBankSelect() {
774 addPass(new RegBankSelect());
778 bool GCNPassConfig::addGlobalInstructionSelect() {
779 addPass(new InstructionSelect());
785 void GCNPassConfig::addPreRegAlloc() {
786 if (LateCFGStructurize) {
787 addPass(createAMDGPUMachineCFGStructurizerPass());
789 addPass(createSIWholeQuadModePass());
792 void GCNPassConfig::addFastRegAlloc(FunctionPass *RegAllocPass) {
793 // FIXME: We have to disable the verifier here because of PHIElimination +
794 // TwoAddressInstructions disabling it.
796 // This must be run immediately after phi elimination and before
797 // TwoAddressInstructions, otherwise the processing of the tied operand of
798 // SI_ELSE will introduce a copy of the tied operand source after the else.
799 insertPass(&PHIEliminationID, &SILowerControlFlowID, false);
801 TargetPassConfig::addFastRegAlloc(RegAllocPass);
804 void GCNPassConfig::addOptimizedRegAlloc(FunctionPass *RegAllocPass) {
805 // This needs to be run directly before register allocation because earlier
806 // passes might recompute live intervals.
807 insertPass(&MachineSchedulerID, &SIFixControlFlowLiveIntervalsID);
809 // This must be run immediately after phi elimination and before
810 // TwoAddressInstructions, otherwise the processing of the tied operand of
811 // SI_ELSE will introduce a copy of the tied operand source after the else.
812 insertPass(&PHIEliminationID, &SILowerControlFlowID, false);
814 TargetPassConfig::addOptimizedRegAlloc(RegAllocPass);
817 void GCNPassConfig::addPostRegAlloc() {
818 addPass(&SIFixVGPRCopiesID);
819 addPass(&SIOptimizeExecMaskingID);
820 TargetPassConfig::addPostRegAlloc();
823 void GCNPassConfig::addPreSched2() {
826 void GCNPassConfig::addPreEmitPass() {
827 // The hazard recognizer that runs as part of the post-ra scheduler does not
828 // guarantee to be able handle all hazards correctly. This is because if there
829 // are multiple scheduling regions in a basic block, the regions are scheduled
830 // bottom up, so when we begin to schedule a region we don't know what
831 // instructions were emitted directly before it.
833 // Here we add a stand-alone hazard recognizer pass which can handle all
835 addPass(&PostRAHazardRecognizerID);
837 if (EnableSIInsertWaitcntsPass)
838 addPass(createSIInsertWaitcntsPass());
840 addPass(createSIInsertWaitsPass());
841 addPass(createSIShrinkInstructionsPass());
842 addPass(&SIInsertSkipsPassID);
843 addPass(createSIDebuggerInsertNopsPass());
844 addPass(&BranchRelaxationPassID);
847 TargetPassConfig *GCNTargetMachine::createPassConfig(PassManagerBase &PM) {
848 return new GCNPassConfig(*this, PM);