lib/Target/AMDGPU/AMDGPUTargetMachine.cpp

   1 //===-- AMDGPUTargetMachine.cpp - TargetMachine for hw codegen targets-----===//
   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 /// \file
  10 /// The AMDGPU target machine contains all of the hardware specific
  11 /// information  needed to emit code for R600 and SI GPUs.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "AMDGPUTargetMachine.h"
  16 #include "AMDGPU.h"
  17 #include "AMDGPUAliasAnalysis.h"
  18 #include "AMDGPUCallLowering.h"
  19 #include "AMDGPUInstructionSelector.h"
  20 #include "AMDGPULegalizerInfo.h"
  21 #include "AMDGPUMacroFusion.h"
  22 #include "AMDGPUTargetObjectFile.h"
  23 #include "AMDGPUTargetTransformInfo.h"
  24 #include "GCNIterativeScheduler.h"
  25 #include "GCNSchedStrategy.h"
  26 #include "R600MachineScheduler.h"
  27 #include "SIMachineFunctionInfo.h"
  28 #include "SIMachineScheduler.h"
  29 #include "TargetInfo/AMDGPUTargetInfo.h"
  30 #include "llvm/CodeGen/GlobalISel/IRTranslator.h"
  31 #include "llvm/CodeGen/GlobalISel/InstructionSelect.h"
  32 #include "llvm/CodeGen/GlobalISel/Legalizer.h"
  33 #include "llvm/CodeGen/GlobalISel/RegBankSelect.h"
  34 #include "llvm/CodeGen/MIRParser/MIParser.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/Utils.h"
  51 #include "llvm/Transforms/Vectorize.h"
  52 #include <memory>
  53
  54 using namespace llvm;
  55
  56 static cl::opt<bool> EnableR600StructurizeCFG(
  57   "r600-ir-structurize",
  58   cl::desc("Use StructurizeCFG IR pass"),
  59   cl::init(true));
  60
  61 static cl::opt<bool> EnableSROA(
  62   "amdgpu-sroa",
  63   cl::desc("Run SROA after promote alloca pass"),
  64   cl::ReallyHidden,
  65   cl::init(true));
  66
  67 static cl::opt<bool>
  68 EnableEarlyIfConversion("amdgpu-early-ifcvt", cl::Hidden,
  69                         cl::desc("Run early if-conversion"),
  70                         cl::init(false));
  71
  72 static cl::opt<bool>
  73 OptExecMaskPreRA("amdgpu-opt-exec-mask-pre-ra", cl::Hidden,
  74             cl::desc("Run pre-RA exec mask optimizations"),
  75             cl::init(true));
  76
  77 static cl::opt<bool> EnableR600IfConvert(
  78   "r600-if-convert",
  79   cl::desc("Use if conversion pass"),
  80   cl::ReallyHidden,
  81   cl::init(true));
  82
  83 // Option to disable vectorizer for tests.
  84 static cl::opt<bool> EnableLoadStoreVectorizer(
  85   "amdgpu-load-store-vectorizer",
  86   cl::desc("Enable load store vectorizer"),
  87   cl::init(true),
  88   cl::Hidden);
  89
  90 // Option to control global loads scalarization
  91 static cl::opt<bool> ScalarizeGlobal(
  92   "amdgpu-scalarize-global-loads",
  93   cl::desc("Enable global load scalarization"),
  94   cl::init(true),
  95   cl::Hidden);
  96
  97 // Option to run internalize pass.
  98 static cl::opt<bool> InternalizeSymbols(
  99   "amdgpu-internalize-symbols",
 100   cl::desc("Enable elimination of non-kernel functions and unused globals"),
 101   cl::init(false),
 102   cl::Hidden);
 103
 104 // Option to inline all early.
 105 static cl::opt<bool> EarlyInlineAll(
 106   "amdgpu-early-inline-all",
 107   cl::desc("Inline all functions early"),
 108   cl::init(false),
 109   cl::Hidden);
 110
 111 static cl::opt<bool> EnableSDWAPeephole(
 112   "amdgpu-sdwa-peephole",
 113   cl::desc("Enable SDWA peepholer"),
 114   cl::init(true));
 115
 116 static cl::opt<bool> EnableDPPCombine(
 117   "amdgpu-dpp-combine",
 118   cl::desc("Enable DPP combiner"),
 119   cl::init(true));
 120
 121 // Enable address space based alias analysis
 122 static cl::opt<bool> EnableAMDGPUAliasAnalysis("enable-amdgpu-aa", cl::Hidden,
 123   cl::desc("Enable AMDGPU Alias Analysis"),
 124   cl::init(true));
 125
 126 // Option to run late CFG structurizer
 127 static cl::opt<bool, true> LateCFGStructurize(
 128   "amdgpu-late-structurize",
 129   cl::desc("Enable late CFG structurization"),
 130   cl::location(AMDGPUTargetMachine::EnableLateStructurizeCFG),
 131   cl::Hidden);
 132
 133 static cl::opt<bool, true> EnableAMDGPUFunctionCallsOpt(
 134   "amdgpu-function-calls",
 135   cl::desc("Enable AMDGPU function call support"),
 136   cl::location(AMDGPUTargetMachine::EnableFunctionCalls),
 137   cl::init(true),
 138   cl::Hidden);
 139
 140 // Enable lib calls simplifications
 141 static cl::opt<bool> EnableLibCallSimplify(
 142   "amdgpu-simplify-libcall",
 143   cl::desc("Enable amdgpu library simplifications"),
 144   cl::init(true),
 145   cl::Hidden);
 146
 147 static cl::opt<bool> EnableLowerKernelArguments(
 148   "amdgpu-ir-lower-kernel-arguments",
 149   cl::desc("Lower kernel argument loads in IR pass"),
 150   cl::init(true),
 151   cl::Hidden);
 152
 153 static cl::opt<bool> EnableRegReassign(
 154   "amdgpu-reassign-regs",
 155   cl::desc("Enable register reassign optimizations on gfx10+"),
 156   cl::init(true),
 157   cl::Hidden);
 158
 159 // Enable atomic optimization
 160 static cl::opt<bool> EnableAtomicOptimizations(
 161   "amdgpu-atomic-optimizations",
 162   cl::desc("Enable atomic optimizations"),
 163   cl::init(false),
 164   cl::Hidden);
 165
 166 // Enable Mode register optimization
 167 static cl::opt<bool> EnableSIModeRegisterPass(
 168   "amdgpu-mode-register",
 169   cl::desc("Enable mode register pass"),
 170   cl::init(true),
 171   cl::Hidden);
 172
 173 // Option is used in lit tests to prevent deadcoding of patterns inspected.
 174 static cl::opt<bool>
 175 EnableDCEInRA("amdgpu-dce-in-ra",
 176     cl::init(true), cl::Hidden,
 177     cl::desc("Enable machine DCE inside regalloc"));
 178
 179 static cl::opt<bool> EnableScalarIRPasses(
 180   "amdgpu-scalar-ir-passes",
 181   cl::desc("Enable scalar IR passes"),
 182   cl::init(true),
 183   cl::Hidden);
 184
 185 extern "C" void LLVMInitializeAMDGPUTarget() {
 186   // Register the target
 187   RegisterTargetMachine<R600TargetMachine> X(getTheAMDGPUTarget());
 188   RegisterTargetMachine<GCNTargetMachine> Y(getTheGCNTarget());
 189
 190   PassRegistry *PR = PassRegistry::getPassRegistry();
 191   initializeR600ClauseMergePassPass(*PR);
 192   initializeR600ControlFlowFinalizerPass(*PR);
 193   initializeR600PacketizerPass(*PR);
 194   initializeR600ExpandSpecialInstrsPassPass(*PR);
 195   initializeR600VectorRegMergerPass(*PR);
 196   initializeGlobalISel(*PR);
 197   initializeAMDGPUDAGToDAGISelPass(*PR);
 198   initializeGCNDPPCombinePass(*PR);
 199   initializeSILowerI1CopiesPass(*PR);
 200   initializeSILowerSGPRSpillsPass(*PR);
 201   initializeSIFixSGPRCopiesPass(*PR);
 202   initializeSIFixVGPRCopiesPass(*PR);
 203   initializeSIFixupVectorISelPass(*PR);
 204   initializeSIFoldOperandsPass(*PR);
 205   initializeSIPeepholeSDWAPass(*PR);
 206   initializeSIShrinkInstructionsPass(*PR);
 207   initializeSIOptimizeExecMaskingPreRAPass(*PR);
 208   initializeSILoadStoreOptimizerPass(*PR);
 209   initializeAMDGPUFixFunctionBitcastsPass(*PR);
 210   initializeAMDGPUAlwaysInlinePass(*PR);
 211   initializeAMDGPUAnnotateKernelFeaturesPass(*PR);
 212   initializeAMDGPUAnnotateUniformValuesPass(*PR);
 213   initializeAMDGPUArgumentUsageInfoPass(*PR);
 214   initializeAMDGPUAtomicOptimizerPass(*PR);
 215   initializeAMDGPULowerKernelArgumentsPass(*PR);
 216   initializeAMDGPULowerKernelAttributesPass(*PR);
 217   initializeAMDGPULowerIntrinsicsPass(*PR);
 218   initializeAMDGPUOpenCLEnqueuedBlockLoweringPass(*PR);
 219   initializeAMDGPUPromoteAllocaPass(*PR);
 220   initializeAMDGPUCodeGenPreparePass(*PR);
 221   initializeAMDGPUPropagateAttributesEarlyPass(*PR);
 222   initializeAMDGPUPropagateAttributesLatePass(*PR);
 223   initializeAMDGPURewriteOutArgumentsPass(*PR);
 224   initializeAMDGPUUnifyMetadataPass(*PR);
 225   initializeSIAnnotateControlFlowPass(*PR);
 226   initializeSIInsertWaitcntsPass(*PR);
 227   initializeSIModeRegisterPass(*PR);
 228   initializeSIWholeQuadModePass(*PR);
 229   initializeSILowerControlFlowPass(*PR);
 230   initializeSIInsertSkipsPass(*PR);
 231   initializeSIMemoryLegalizerPass(*PR);
 232   initializeSIOptimizeExecMaskingPass(*PR);
 233   initializeSIPreAllocateWWMRegsPass(*PR);
 234   initializeSIFormMemoryClausesPass(*PR);
 235   initializeAMDGPUUnifyDivergentExitNodesPass(*PR);
 236   initializeAMDGPUAAWrapperPassPass(*PR);
 237   initializeAMDGPUExternalAAWrapperPass(*PR);
 238   initializeAMDGPUUseNativeCallsPass(*PR);
 239   initializeAMDGPUSimplifyLibCallsPass(*PR);
 240   initializeAMDGPUInlinerPass(*PR);
 241   initializeAMDGPUPrintfRuntimeBindingPass(*PR);
 242   initializeGCNRegBankReassignPass(*PR);
 243   initializeGCNNSAReassignPass(*PR);
 244 }
 245
 246 static std::unique_ptr<TargetLoweringObjectFile> createTLOF(const Triple &TT) {
 247   return std::make_unique<AMDGPUTargetObjectFile>();
 248 }
 249
 250 static ScheduleDAGInstrs *createR600MachineScheduler(MachineSchedContext *C) {
 251   return new ScheduleDAGMILive(C, std::make_unique<R600SchedStrategy>());
 252 }
 253
 254 static ScheduleDAGInstrs *createSIMachineScheduler(MachineSchedContext *C) {
 255   return new SIScheduleDAGMI(C);
 256 }
 257
 258 static ScheduleDAGInstrs *
 259 createGCNMaxOccupancyMachineScheduler(MachineSchedContext *C) {
 260   ScheduleDAGMILive *DAG =
 261     new GCNScheduleDAGMILive(C, std::make_unique<GCNMaxOccupancySchedStrategy>(C));
 262   DAG->addMutation(createLoadClusterDAGMutation(DAG->TII, DAG->TRI));
 263   DAG->addMutation(createStoreClusterDAGMutation(DAG->TII, DAG->TRI));
 264   DAG->addMutation(createAMDGPUMacroFusionDAGMutation());
 265   return DAG;
 266 }
 267
 268 static ScheduleDAGInstrs *
 269 createIterativeGCNMaxOccupancyMachineScheduler(MachineSchedContext *C) {
 270   auto DAG = new GCNIterativeScheduler(C,
 271     GCNIterativeScheduler::SCHEDULE_LEGACYMAXOCCUPANCY);
 272   DAG->addMutation(createLoadClusterDAGMutation(DAG->TII, DAG->TRI));
 273   DAG->addMutation(createStoreClusterDAGMutation(DAG->TII, DAG->TRI));
 274   return DAG;
 275 }
 276
 277 static ScheduleDAGInstrs *createMinRegScheduler(MachineSchedContext *C) {
 278   return new GCNIterativeScheduler(C,
 279     GCNIterativeScheduler::SCHEDULE_MINREGFORCED);
 280 }
 281
 282 static ScheduleDAGInstrs *
 283 createIterativeILPMachineScheduler(MachineSchedContext *C) {
 284   auto DAG = new GCNIterativeScheduler(C,
 285     GCNIterativeScheduler::SCHEDULE_ILP);
 286   DAG->addMutation(createLoadClusterDAGMutation(DAG->TII, DAG->TRI));
 287   DAG->addMutation(createStoreClusterDAGMutation(DAG->TII, DAG->TRI));
 288   DAG->addMutation(createAMDGPUMacroFusionDAGMutation());
 289   return DAG;
 290 }
 291
 292 static MachineSchedRegistry
 293 R600SchedRegistry("r600", "Run R600's custom scheduler",
 294                    createR600MachineScheduler);
 295
 296 static MachineSchedRegistry
 297 SISchedRegistry("si", "Run SI's custom scheduler",
 298                 createSIMachineScheduler);
 299
 300 static MachineSchedRegistry
 301 GCNMaxOccupancySchedRegistry("gcn-max-occupancy",
 302                              "Run GCN scheduler to maximize occupancy",
 303                              createGCNMaxOccupancyMachineScheduler);
 304
 305 static MachineSchedRegistry
 306 IterativeGCNMaxOccupancySchedRegistry("gcn-max-occupancy-experimental",
 307   "Run GCN scheduler to maximize occupancy (experimental)",
 308   createIterativeGCNMaxOccupancyMachineScheduler);
 309
 310 static MachineSchedRegistry
 311 GCNMinRegSchedRegistry("gcn-minreg",
 312   "Run GCN iterative scheduler for minimal register usage (experimental)",
 313   createMinRegScheduler);
 314
 315 static MachineSchedRegistry
 316 GCNILPSchedRegistry("gcn-ilp",
 317   "Run GCN iterative scheduler for ILP scheduling (experimental)",
 318   createIterativeILPMachineScheduler);
 319
 320 static StringRef computeDataLayout(const Triple &TT) {
 321   if (TT.getArch() == Triple::r600) {
 322     // 32-bit pointers.
 323       return "e-p:32:32-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128"
 324              "-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64-S32-A5";
 325   }
 326
 327   // 32-bit private, local, and region pointers. 64-bit global, constant and
 328   // flat, non-integral buffer fat pointers.
 329     return "e-p:64:64-p1:64:64-p2:32:32-p3:32:32-p4:64:64-p5:32:32-p6:32:32"
 330          "-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128"
 331          "-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64-S32-A5"
 332          "-ni:7";
 333 }
 334
 335 LLVM_READNONE
 336 static StringRef getGPUOrDefault(const Triple &TT, StringRef GPU) {
 337   if (!GPU.empty())
 338     return GPU;
 339
 340   // Need to default to a target with flat support for HSA.
 341   if (TT.getArch() == Triple::amdgcn)
 342     return TT.getOS() == Triple::AMDHSA ? "generic-hsa" : "generic";
 343
 344   return "r600";
 345 }
 346
 347 static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
 348   // The AMDGPU toolchain only supports generating shared objects, so we
 349   // must always use PIC.
 350   return Reloc::PIC_;
 351 }
 352
 353 AMDGPUTargetMachine::AMDGPUTargetMachine(const Target &T, const Triple &TT,
 354                                          StringRef CPU, StringRef FS,
 355                                          TargetOptions Options,
 356                                          Optional<Reloc::Model> RM,
 357                                          Optional<CodeModel::Model> CM,
 358                                          CodeGenOpt::Level OptLevel)
 359     : LLVMTargetMachine(T, computeDataLayout(TT), TT, getGPUOrDefault(TT, CPU),
 360                         FS, Options, getEffectiveRelocModel(RM),
 361                         getEffectiveCodeModel(CM, CodeModel::Small), OptLevel),
 362       TLOF(createTLOF(getTargetTriple())) {
 363   initAsmInfo();
 364 }
 365
 366 bool AMDGPUTargetMachine::EnableLateStructurizeCFG = false;
 367 bool AMDGPUTargetMachine::EnableFunctionCalls = false;
 368
 369 AMDGPUTargetMachine::~AMDGPUTargetMachine() = default;
 370
 371 StringRef AMDGPUTargetMachine::getGPUName(const Function &F) const {
 372   Attribute GPUAttr = F.getFnAttribute("target-cpu");
 373   return GPUAttr.hasAttribute(Attribute::None) ?
 374     getTargetCPU() : GPUAttr.getValueAsString();
 375 }
 376
 377 StringRef AMDGPUTargetMachine::getFeatureString(const Function &F) const {
 378   Attribute FSAttr = F.getFnAttribute("target-features");
 379
 380   return FSAttr.hasAttribute(Attribute::None) ?
 381     getTargetFeatureString() :
 382     FSAttr.getValueAsString();
 383 }
 384
 385 /// Predicate for Internalize pass.
 386 static bool mustPreserveGV(const GlobalValue &GV) {
 387   if (const Function *F = dyn_cast<Function>(&GV))
 388     return F->isDeclaration() || AMDGPU::isEntryFunctionCC(F->getCallingConv());
 389
 390   return !GV.use_empty();
 391 }
 392
 393 void AMDGPUTargetMachine::adjustPassManager(PassManagerBuilder &Builder) {
 394   Builder.DivergentTarget = true;
 395
 396   bool EnableOpt = getOptLevel() > CodeGenOpt::None;
 397   bool Internalize = InternalizeSymbols;
 398   bool EarlyInline = EarlyInlineAll && EnableOpt && !EnableFunctionCalls;
 399   bool AMDGPUAA = EnableAMDGPUAliasAnalysis && EnableOpt;
 400   bool LibCallSimplify = EnableLibCallSimplify && EnableOpt;
 401
 402   if (EnableFunctionCalls) {
 403     delete Builder.Inliner;
 404     Builder.Inliner = createAMDGPUFunctionInliningPass();
 405   }
 406
 407   Builder.addExtension(
 408     PassManagerBuilder::EP_ModuleOptimizerEarly,
 409     [Internalize, EarlyInline, AMDGPUAA, this](const PassManagerBuilder &,
 410                                                legacy::PassManagerBase &PM) {
 411       if (AMDGPUAA) {
 412         PM.add(createAMDGPUAAWrapperPass());
 413         PM.add(createAMDGPUExternalAAWrapperPass());
 414       }
 415       PM.add(createAMDGPUUnifyMetadataPass());
 416       PM.add(createAMDGPUPrintfRuntimeBinding());
 417       PM.add(createAMDGPUPropagateAttributesLatePass(this));
 418       if (Internalize) {
 419         PM.add(createInternalizePass(mustPreserveGV));
 420         PM.add(createGlobalDCEPass());
 421       }
 422       if (EarlyInline)
 423         PM.add(createAMDGPUAlwaysInlinePass(false));
 424   });
 425
 426   const auto &Opt = Options;
 427   Builder.addExtension(
 428     PassManagerBuilder::EP_EarlyAsPossible,
 429     [AMDGPUAA, LibCallSimplify, &Opt, this](const PassManagerBuilder &,
 430                                             legacy::PassManagerBase &PM) {
 431       if (AMDGPUAA) {
 432         PM.add(createAMDGPUAAWrapperPass());
 433         PM.add(createAMDGPUExternalAAWrapperPass());
 434       }
 435       PM.add(llvm::createAMDGPUPropagateAttributesEarlyPass(this));
 436       PM.add(llvm::createAMDGPUUseNativeCallsPass());
 437       if (LibCallSimplify)
 438         PM.add(llvm::createAMDGPUSimplifyLibCallsPass(Opt, this));
 439   });
 440
 441   Builder.addExtension(
 442     PassManagerBuilder::EP_CGSCCOptimizerLate,
 443     [](const PassManagerBuilder &, legacy::PassManagerBase &PM) {
 444       // Add infer address spaces pass to the opt pipeline after inlining
 445       // but before SROA to increase SROA opportunities.
 446       PM.add(createInferAddressSpacesPass());
 447
 448       // This should run after inlining to have any chance of doing anything,
 449       // and before other cleanup optimizations.
 450       PM.add(createAMDGPULowerKernelAttributesPass());
 451   });
 452 }
 453
 454 //===----------------------------------------------------------------------===//
 455 // R600 Target Machine (R600 -> Cayman)
 456 //===----------------------------------------------------------------------===//
 457
 458 R600TargetMachine::R600TargetMachine(const Target &T, const Triple &TT,
 459                                      StringRef CPU, StringRef FS,
 460                                      TargetOptions Options,
 461                                      Optional<Reloc::Model> RM,
 462                                      Optional<CodeModel::Model> CM,
 463                                      CodeGenOpt::Level OL, bool JIT)
 464     : AMDGPUTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL) {
 465   setRequiresStructuredCFG(true);
 466
 467   // Override the default since calls aren't supported for r600.
 468   if (EnableFunctionCalls &&
 469       EnableAMDGPUFunctionCallsOpt.getNumOccurrences() == 0)
 470     EnableFunctionCalls = false;
 471 }
 472
 473 const R600Subtarget *R600TargetMachine::getSubtargetImpl(
 474   const Function &F) const {
 475   StringRef GPU = getGPUName(F);
 476   StringRef FS = getFeatureString(F);
 477
 478   SmallString<128> SubtargetKey(GPU);
 479   SubtargetKey.append(FS);
 480
 481   auto &I = SubtargetMap[SubtargetKey];
 482   if (!I) {
 483     // This needs to be done before we create a new subtarget since any
 484     // creation will depend on the TM and the code generation flags on the
 485     // function that reside in TargetOptions.
 486     resetTargetOptions(F);
 487     I = std::make_unique<R600Subtarget>(TargetTriple, GPU, FS, *this);
 488   }
 489
 490   return I.get();
 491 }
 492
 493 TargetTransformInfo
 494 R600TargetMachine::getTargetTransformInfo(const Function &F) {
 495   return TargetTransformInfo(R600TTIImpl(this, F));
 496 }
 497
 498 //===----------------------------------------------------------------------===//
 499 // GCN Target Machine (SI+)
 500 //===----------------------------------------------------------------------===//
 501
 502 GCNTargetMachine::GCNTargetMachine(const Target &T, const Triple &TT,
 503                                    StringRef CPU, StringRef FS,
 504                                    TargetOptions Options,
 505                                    Optional<Reloc::Model> RM,
 506                                    Optional<CodeModel::Model> CM,
 507                                    CodeGenOpt::Level OL, bool JIT)
 508     : AMDGPUTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL) {}
 509
 510 const GCNSubtarget *GCNTargetMachine::getSubtargetImpl(const Function &F) const {
 511   StringRef GPU = getGPUName(F);
 512   StringRef FS = getFeatureString(F);
 513
 514   SmallString<128> SubtargetKey(GPU);
 515   SubtargetKey.append(FS);
 516
 517   auto &I = SubtargetMap[SubtargetKey];
 518   if (!I) {
 519     // This needs to be done before we create a new subtarget since any
 520     // creation will depend on the TM and the code generation flags on the
 521     // function that reside in TargetOptions.
 522     resetTargetOptions(F);
 523     I = std::make_unique<GCNSubtarget>(TargetTriple, GPU, FS, *this);
 524   }
 525
 526   I->setScalarizeGlobalBehavior(ScalarizeGlobal);
 527
 528   return I.get();
 529 }
 530
 531 TargetTransformInfo
 532 GCNTargetMachine::getTargetTransformInfo(const Function &F) {
 533   return TargetTransformInfo(GCNTTIImpl(this, F));
 534 }
 535
 536 //===----------------------------------------------------------------------===//
 537 // AMDGPU Pass Setup
 538 //===----------------------------------------------------------------------===//
 539
 540 namespace {
 541
 542 class AMDGPUPassConfig : public TargetPassConfig {
 543 public:
 544   AMDGPUPassConfig(LLVMTargetMachine &TM, PassManagerBase &PM)
 545     : TargetPassConfig(TM, PM) {
 546     // Exceptions and StackMaps are not supported, so these passes will never do
 547     // anything.
 548     disablePass(&StackMapLivenessID);
 549     disablePass(&FuncletLayoutID);
 550   }
 551
 552   AMDGPUTargetMachine &getAMDGPUTargetMachine() const {
 553     return getTM<AMDGPUTargetMachine>();
 554   }
 555
 556   ScheduleDAGInstrs *
 557   createMachineScheduler(MachineSchedContext *C) const override {
 558     ScheduleDAGMILive *DAG = createGenericSchedLive(C);
 559     DAG->addMutation(createLoadClusterDAGMutation(DAG->TII, DAG->TRI));
 560     DAG->addMutation(createStoreClusterDAGMutation(DAG->TII, DAG->TRI));
 561     return DAG;
 562   }
 563
 564   void addEarlyCSEOrGVNPass();
 565   void addStraightLineScalarOptimizationPasses();
 566   void addIRPasses() override;
 567   void addCodeGenPrepare() override;
 568   bool addPreISel() override;
 569   bool addInstSelector() override;
 570   bool addGCPasses() override;
 571
 572   std::unique_ptr<CSEConfigBase> getCSEConfig() const override;
 573 };
 574
 575 std::unique_ptr<CSEConfigBase> AMDGPUPassConfig::getCSEConfig() const {
 576   return getStandardCSEConfigForOpt(TM->getOptLevel());
 577 }
 578
 579 class R600PassConfig final : public AMDGPUPassConfig {
 580 public:
 581   R600PassConfig(LLVMTargetMachine &TM, PassManagerBase &PM)
 582     : AMDGPUPassConfig(TM, PM) {}
 583
 584   ScheduleDAGInstrs *createMachineScheduler(
 585     MachineSchedContext *C) const override {
 586     return createR600MachineScheduler(C);
 587   }
 588
 589   bool addPreISel() override;
 590   bool addInstSelector() override;
 591   void addPreRegAlloc() override;
 592   void addPreSched2() override;
 593   void addPreEmitPass() override;
 594 };
 595
 596 class GCNPassConfig final : public AMDGPUPassConfig {
 597 public:
 598   GCNPassConfig(LLVMTargetMachine &TM, PassManagerBase &PM)
 599     : AMDGPUPassConfig(TM, PM) {
 600     // It is necessary to know the register usage of the entire call graph.  We
 601     // allow calls without EnableAMDGPUFunctionCalls if they are marked
 602     // noinline, so this is always required.
 603     setRequiresCodeGenSCCOrder(true);
 604   }
 605
 606   GCNTargetMachine &getGCNTargetMachine() const {
 607     return getTM<GCNTargetMachine>();
 608   }
 609
 610   ScheduleDAGInstrs *
 611   createMachineScheduler(MachineSchedContext *C) const override;
 612
 613   bool addPreISel() override;
 614   void addMachineSSAOptimization() override;
 615   bool addILPOpts() override;
 616   bool addInstSelector() override;
 617   bool addIRTranslator() override;
 618   bool addLegalizeMachineIR() override;
 619   bool addRegBankSelect() override;
 620   bool addGlobalInstructionSelect() override;
 621   void addFastRegAlloc() override;
 622   void addOptimizedRegAlloc() override;
 623   void addPreRegAlloc() override;
 624   bool addPreRewrite() override;
 625   void addPostRegAlloc() override;
 626   void addPreSched2() override;
 627   void addPreEmitPass() override;
 628 };
 629
 630 } // end anonymous namespace
 631
 632 void AMDGPUPassConfig::addEarlyCSEOrGVNPass() {
 633   if (getOptLevel() == CodeGenOpt::Aggressive)
 634     addPass(createGVNPass());
 635   else
 636     addPass(createEarlyCSEPass());
 637 }
 638
 639 void AMDGPUPassConfig::addStraightLineScalarOptimizationPasses() {
 640   addPass(createLICMPass());
 641   addPass(createSeparateConstOffsetFromGEPPass());
 642   addPass(createSpeculativeExecutionPass());
 643   // ReassociateGEPs exposes more opportunites for SLSR. See
 644   // the example in reassociate-geps-and-slsr.ll.
 645   addPass(createStraightLineStrengthReducePass());
 646   // SeparateConstOffsetFromGEP and SLSR creates common expressions which GVN or
 647   // EarlyCSE can reuse.
 648   addEarlyCSEOrGVNPass();
 649   // Run NaryReassociate after EarlyCSE/GVN to be more effective.
 650   addPass(createNaryReassociatePass());
 651   // NaryReassociate on GEPs creates redundant common expressions, so run
 652   // EarlyCSE after it.
 653   addPass(createEarlyCSEPass());
 654 }
 655
 656 void AMDGPUPassConfig::addIRPasses() {
 657   const AMDGPUTargetMachine &TM = getAMDGPUTargetMachine();
 658
 659   // There is no reason to run these.
 660   disablePass(&StackMapLivenessID);
 661   disablePass(&FuncletLayoutID);
 662   disablePass(&PatchableFunctionID);
 663
 664   addPass(createAMDGPUPrintfRuntimeBinding());
 665
 666   // This must occur before inlining, as the inliner will not look through
 667   // bitcast calls.
 668   addPass(createAMDGPUFixFunctionBitcastsPass());
 669
 670   // A call to propagate attributes pass in the backend in case opt was not run.
 671   addPass(createAMDGPUPropagateAttributesEarlyPass(&TM));
 672
 673   addPass(createAtomicExpandPass());
 674
 675
 676   addPass(createAMDGPULowerIntrinsicsPass());
 677
 678   // Function calls are not supported, so make sure we inline everything.
 679   addPass(createAMDGPUAlwaysInlinePass());
 680   addPass(createAlwaysInlinerLegacyPass());
 681   // We need to add the barrier noop pass, otherwise adding the function
 682   // inlining pass will cause all of the PassConfigs passes to be run
 683   // one function at a time, which means if we have a nodule with two
 684   // functions, then we will generate code for the first function
 685   // without ever running any passes on the second.
 686   addPass(createBarrierNoopPass());
 687
 688   // Handle uses of OpenCL image2d_t, image3d_t and sampler_t arguments.
 689   if (TM.getTargetTriple().getArch() == Triple::r600)
 690     addPass(createR600OpenCLImageTypeLoweringPass());
 691
 692   // Replace OpenCL enqueued block function pointers with global variables.
 693   addPass(createAMDGPUOpenCLEnqueuedBlockLoweringPass());
 694
 695   if (TM.getOptLevel() > CodeGenOpt::None) {
 696     addPass(createInferAddressSpacesPass());
 697     addPass(createAMDGPUPromoteAlloca());
 698
 699     if (EnableSROA)
 700       addPass(createSROAPass());
 701
 702     if (EnableScalarIRPasses)
 703       addStraightLineScalarOptimizationPasses();
 704
 705     if (EnableAMDGPUAliasAnalysis) {
 706       addPass(createAMDGPUAAWrapperPass());
 707       addPass(createExternalAAWrapperPass([](Pass &P, Function &,
 708                                              AAResults &AAR) {
 709         if (auto *WrapperPass = P.getAnalysisIfAvailable<AMDGPUAAWrapperPass>())
 710           AAR.addAAResult(WrapperPass->getResult());
 711         }));
 712     }
 713   }
 714
 715   if (TM.getTargetTriple().getArch() == Triple::amdgcn) {
 716     // TODO: May want to move later or split into an early and late one.
 717     addPass(createAMDGPUCodeGenPreparePass());
 718   }
 719
 720   TargetPassConfig::addIRPasses();
 721
 722   // EarlyCSE is not always strong enough to clean up what LSR produces. For
 723   // example, GVN can combine
 724   //
 725   //   %0 = add %a, %b
 726   //   %1 = add %b, %a
 727   //
 728   // and
 729   //
 730   //   %0 = shl nsw %a, 2
 731   //   %1 = shl %a, 2
 732   //
 733   // but EarlyCSE can do neither of them.
 734   if (getOptLevel() != CodeGenOpt::None && EnableScalarIRPasses)
 735     addEarlyCSEOrGVNPass();
 736 }
 737
 738 void AMDGPUPassConfig::addCodeGenPrepare() {
 739   if (TM->getTargetTriple().getArch() == Triple::amdgcn)
 740     addPass(createAMDGPUAnnotateKernelFeaturesPass());
 741
 742   if (TM->getTargetTriple().getArch() == Triple::amdgcn &&
 743       EnableLowerKernelArguments)
 744     addPass(createAMDGPULowerKernelArgumentsPass());
 745
 746   addPass(&AMDGPUPerfHintAnalysisID);
 747
 748   TargetPassConfig::addCodeGenPrepare();
 749
 750   if (EnableLoadStoreVectorizer)
 751     addPass(createLoadStoreVectorizerPass());
 752 }
 753
 754 bool AMDGPUPassConfig::addPreISel() {
 755   addPass(createLowerSwitchPass());
 756   addPass(createFlattenCFGPass());
 757   return false;
 758 }
 759
 760 bool AMDGPUPassConfig::addInstSelector() {
 761   // Defer the verifier until FinalizeISel.
 762   addPass(createAMDGPUISelDag(&getAMDGPUTargetMachine(), getOptLevel()), false);
 763   return false;
 764 }
 765
 766 bool AMDGPUPassConfig::addGCPasses() {
 767   // Do nothing. GC is not supported.
 768   return false;
 769 }
 770
 771 //===----------------------------------------------------------------------===//
 772 // R600 Pass Setup
 773 //===----------------------------------------------------------------------===//
 774
 775 bool R600PassConfig::addPreISel() {
 776   AMDGPUPassConfig::addPreISel();
 777
 778   if (EnableR600StructurizeCFG)
 779     addPass(createStructurizeCFGPass());
 780   return false;
 781 }
 782
 783 bool R600PassConfig::addInstSelector() {
 784   addPass(createR600ISelDag(&getAMDGPUTargetMachine(), getOptLevel()));
 785   return false;
 786 }
 787
 788 void R600PassConfig::addPreRegAlloc() {
 789   addPass(createR600VectorRegMerger());
 790 }
 791
 792 void R600PassConfig::addPreSched2() {
 793   addPass(createR600EmitClauseMarkers(), false);
 794   if (EnableR600IfConvert)
 795     addPass(&IfConverterID, false);
 796   addPass(createR600ClauseMergePass(), false);
 797 }
 798
 799 void R600PassConfig::addPreEmitPass() {
 800   addPass(createAMDGPUCFGStructurizerPass(), false);
 801   addPass(createR600ExpandSpecialInstrsPass(), false);
 802   addPass(&FinalizeMachineBundlesID, false);
 803   addPass(createR600Packetizer(), false);
 804   addPass(createR600ControlFlowFinalizer(), false);
 805 }
 806
 807 TargetPassConfig *R600TargetMachine::createPassConfig(PassManagerBase &PM) {
 808   return new R600PassConfig(*this, PM);
 809 }
 810
 811 //===----------------------------------------------------------------------===//
 812 // GCN Pass Setup
 813 //===----------------------------------------------------------------------===//
 814
 815 ScheduleDAGInstrs *GCNPassConfig::createMachineScheduler(
 816   MachineSchedContext *C) const {
 817   const GCNSubtarget &ST = C->MF->getSubtarget<GCNSubtarget>();
 818   if (ST.enableSIScheduler())
 819     return createSIMachineScheduler(C);
 820   return createGCNMaxOccupancyMachineScheduler(C);
 821 }
 822
 823 bool GCNPassConfig::addPreISel() {
 824   AMDGPUPassConfig::addPreISel();
 825
 826   if (EnableAtomicOptimizations) {
 827     addPass(createAMDGPUAtomicOptimizerPass());
 828   }
 829
 830   // FIXME: We need to run a pass to propagate the attributes when calls are
 831   // supported.
 832
 833   // Merge divergent exit nodes. StructurizeCFG won't recognize the multi-exit
 834   // regions formed by them.
 835   addPass(&AMDGPUUnifyDivergentExitNodesID);
 836   if (!LateCFGStructurize) {
 837     addPass(createStructurizeCFGPass(true)); // true -> SkipUniformRegions
 838   }
 839   addPass(createSinkingPass());
 840   addPass(createAMDGPUAnnotateUniformValues());
 841   if (!LateCFGStructurize) {
 842     addPass(createSIAnnotateControlFlowPass());
 843   }
 844   addPass(createLCSSAPass());
 845
 846   return false;
 847 }
 848
 849 void GCNPassConfig::addMachineSSAOptimization() {
 850   TargetPassConfig::addMachineSSAOptimization();
 851
 852   // We want to fold operands after PeepholeOptimizer has run (or as part of
 853   // it), because it will eliminate extra copies making it easier to fold the
 854   // real source operand. We want to eliminate dead instructions after, so that
 855   // we see fewer uses of the copies. We then need to clean up the dead
 856   // instructions leftover after the operands are folded as well.
 857   //
 858   // XXX - Can we get away without running DeadMachineInstructionElim again?
 859   addPass(&SIFoldOperandsID);
 860   if (EnableDPPCombine)
 861     addPass(&GCNDPPCombineID);
 862   addPass(&DeadMachineInstructionElimID);
 863   addPass(&SILoadStoreOptimizerID);
 864   if (EnableSDWAPeephole) {
 865     addPass(&SIPeepholeSDWAID);
 866     addPass(&EarlyMachineLICMID);
 867     addPass(&MachineCSEID);
 868     addPass(&SIFoldOperandsID);
 869     addPass(&DeadMachineInstructionElimID);
 870   }
 871   addPass(createSIShrinkInstructionsPass());
 872 }
 873
 874 bool GCNPassConfig::addILPOpts() {
 875   if (EnableEarlyIfConversion)
 876     addPass(&EarlyIfConverterID);
 877
 878   TargetPassConfig::addILPOpts();
 879   return false;
 880 }
 881
 882 bool GCNPassConfig::addInstSelector() {
 883   AMDGPUPassConfig::addInstSelector();
 884   addPass(&SIFixSGPRCopiesID);
 885   addPass(createSILowerI1CopiesPass());
 886   addPass(createSIFixupVectorISelPass());
 887   addPass(createSIAddIMGInitPass());
 888   // FIXME: Remove this once the phi on CF_END is cleaned up by either removing
 889   // LCSSA or other ways.
 890   addPass(&UnreachableMachineBlockElimID);
 891   return false;
 892 }
 893
 894 bool GCNPassConfig::addIRTranslator() {
 895   addPass(new IRTranslator());
 896   return false;
 897 }
 898
 899 bool GCNPassConfig::addLegalizeMachineIR() {
 900   addPass(new Legalizer());
 901   return false;
 902 }
 903
 904 bool GCNPassConfig::addRegBankSelect() {
 905   addPass(new RegBankSelect());
 906   return false;
 907 }
 908
 909 bool GCNPassConfig::addGlobalInstructionSelect() {
 910   addPass(new InstructionSelect());
 911   return false;
 912 }
 913
 914 void GCNPassConfig::addPreRegAlloc() {
 915   if (LateCFGStructurize) {
 916     addPass(createAMDGPUMachineCFGStructurizerPass());
 917   }
 918   addPass(createSIWholeQuadModePass());
 919 }
 920
 921 void GCNPassConfig::addFastRegAlloc() {
 922   // FIXME: We have to disable the verifier here because of PHIElimination +
 923   // TwoAddressInstructions disabling it.
 924
 925   // This must be run immediately after phi elimination and before
 926   // TwoAddressInstructions, otherwise the processing of the tied operand of
 927   // SI_ELSE will introduce a copy of the tied operand source after the else.
 928   insertPass(&PHIEliminationID, &SILowerControlFlowID, false);
 929
 930   // This must be run just after RegisterCoalescing.
 931   insertPass(&RegisterCoalescerID, &SIPreAllocateWWMRegsID, false);
 932
 933   TargetPassConfig::addFastRegAlloc();
 934 }
 935
 936 void GCNPassConfig::addOptimizedRegAlloc() {
 937   if (OptExecMaskPreRA) {
 938     insertPass(&MachineSchedulerID, &SIOptimizeExecMaskingPreRAID);
 939     insertPass(&SIOptimizeExecMaskingPreRAID, &SIFormMemoryClausesID);
 940   } else {
 941     insertPass(&MachineSchedulerID, &SIFormMemoryClausesID);
 942   }
 943
 944   // This must be run immediately after phi elimination and before
 945   // TwoAddressInstructions, otherwise the processing of the tied operand of
 946   // SI_ELSE will introduce a copy of the tied operand source after the else.
 947   insertPass(&PHIEliminationID, &SILowerControlFlowID, false);
 948
 949   // This must be run just after RegisterCoalescing.
 950   insertPass(&RegisterCoalescerID, &SIPreAllocateWWMRegsID, false);
 951
 952   if (EnableDCEInRA)
 953     insertPass(&RenameIndependentSubregsID, &DeadMachineInstructionElimID);
 954
 955   TargetPassConfig::addOptimizedRegAlloc();
 956 }
 957
 958 bool GCNPassConfig::addPreRewrite() {
 959   if (EnableRegReassign) {
 960     addPass(&GCNNSAReassignID);
 961     addPass(&GCNRegBankReassignID);
 962   }
 963   return true;
 964 }
 965
 966 void GCNPassConfig::addPostRegAlloc() {
 967   addPass(&SIFixVGPRCopiesID);
 968   if (getOptLevel() > CodeGenOpt::None)
 969     addPass(&SIOptimizeExecMaskingID);
 970   TargetPassConfig::addPostRegAlloc();
 971
 972   // Equivalent of PEI for SGPRs.
 973   addPass(&SILowerSGPRSpillsID);
 974 }
 975
 976 void GCNPassConfig::addPreSched2() {
 977 }
 978
 979 void GCNPassConfig::addPreEmitPass() {
 980   addPass(createSIMemoryLegalizerPass());
 981   addPass(createSIInsertWaitcntsPass());
 982   addPass(createSIShrinkInstructionsPass());
 983   addPass(createSIModeRegisterPass());
 984
 985   // The hazard recognizer that runs as part of the post-ra scheduler does not
 986   // guarantee to be able handle all hazards correctly. This is because if there
 987   // are multiple scheduling regions in a basic block, the regions are scheduled
 988   // bottom up, so when we begin to schedule a region we don't know what
 989   // instructions were emitted directly before it.
 990   //
 991   // Here we add a stand-alone hazard recognizer pass which can handle all
 992   // cases.
 993   //
 994   // FIXME: This stand-alone pass will emit indiv. S_NOP 0, as needed. It would
 995   // be better for it to emit S_NOP <N> when possible.
 996   addPass(&PostRAHazardRecognizerID);
 997
 998   addPass(&SIInsertSkipsPassID);
 999   addPass(&BranchRelaxationPassID);
1000 }
1001
1002 TargetPassConfig *GCNTargetMachine::createPassConfig(PassManagerBase &PM) {
1003   return new GCNPassConfig(*this, PM);
1004 }
1005
1006 yaml::MachineFunctionInfo *GCNTargetMachine::createDefaultFuncInfoYAML() const {
1007   return new yaml::SIMachineFunctionInfo();
1008 }
1009
1010 yaml::MachineFunctionInfo *
1011 GCNTargetMachine::convertFuncInfoToYAML(const MachineFunction &MF) const {
1012   const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
1013   return new yaml::SIMachineFunctionInfo(*MFI,
1014                                          *MF.getSubtarget().getRegisterInfo());
1015 }
1016
1017 bool GCNTargetMachine::parseMachineFunctionInfo(
1018     const yaml::MachineFunctionInfo &MFI_, PerFunctionMIParsingState &PFS,
1019     SMDiagnostic &Error, SMRange &SourceRange) const {
1020   const yaml::SIMachineFunctionInfo &YamlMFI =
1021       reinterpret_cast<const yaml::SIMachineFunctionInfo &>(MFI_);
1022   MachineFunction &MF = PFS.MF;
1023   SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
1024
1025   MFI->initializeBaseYamlFields(YamlMFI);
1026
1027   auto parseRegister = [&](const yaml::StringValue &RegName, unsigned &RegVal) {
1028     if (parseNamedRegisterReference(PFS, RegVal, RegName.Value, Error)) {
1029       SourceRange = RegName.SourceRange;
1030       return true;
1031     }
1032
1033     return false;
1034   };
1035
1036   auto diagnoseRegisterClass = [&](const yaml::StringValue &RegName) {
1037     // Create a diagnostic for a the register string literal.
1038     const MemoryBuffer &Buffer =
1039         *PFS.SM->getMemoryBuffer(PFS.SM->getMainFileID());
1040     Error = SMDiagnostic(*PFS.SM, SMLoc(), Buffer.getBufferIdentifier(), 1,
1041                          RegName.Value.size(), SourceMgr::DK_Error,
1042                          "incorrect register class for field", RegName.Value,
1043                          None, None);
1044     SourceRange = RegName.SourceRange;
1045     return true;
1046   };
1047
1048   if (parseRegister(YamlMFI.ScratchRSrcReg, MFI->ScratchRSrcReg) ||
1049       parseRegister(YamlMFI.ScratchWaveOffsetReg, MFI->ScratchWaveOffsetReg) ||
1050       parseRegister(YamlMFI.FrameOffsetReg, MFI->FrameOffsetReg) ||
1051       parseRegister(YamlMFI.StackPtrOffsetReg, MFI->StackPtrOffsetReg))
1052     return true;
1053
1054   if (MFI->ScratchRSrcReg != AMDGPU::PRIVATE_RSRC_REG &&
1055       !AMDGPU::SReg_128RegClass.contains(MFI->ScratchRSrcReg)) {
1056     return diagnoseRegisterClass(YamlMFI.ScratchRSrcReg);
1057   }
1058
1059   if (MFI->ScratchWaveOffsetReg != AMDGPU::SCRATCH_WAVE_OFFSET_REG &&
1060       !AMDGPU::SGPR_32RegClass.contains(MFI->ScratchWaveOffsetReg)) {
1061     return diagnoseRegisterClass(YamlMFI.ScratchWaveOffsetReg);
1062   }
1063
1064   if (MFI->FrameOffsetReg != AMDGPU::FP_REG &&
1065       !AMDGPU::SGPR_32RegClass.contains(MFI->FrameOffsetReg)) {
1066     return diagnoseRegisterClass(YamlMFI.FrameOffsetReg);
1067   }
1068
1069   if (MFI->StackPtrOffsetReg != AMDGPU::SP_REG &&
1070       !AMDGPU::SGPR_32RegClass.contains(MFI->StackPtrOffsetReg)) {
1071     return diagnoseRegisterClass(YamlMFI.StackPtrOffsetReg);
1072   }
1073
1074   auto parseAndCheckArgument = [&](const Optional<yaml::SIArgument> &A,
1075                                    const TargetRegisterClass &RC,
1076                                    ArgDescriptor &Arg, unsigned UserSGPRs,
1077                                    unsigned SystemSGPRs) {
1078     // Skip parsing if it's not present.
1079     if (!A)
1080       return false;
1081
1082     if (A->IsRegister) {
1083       unsigned Reg;
1084       if (parseNamedRegisterReference(PFS, Reg, A->RegisterName.Value, Error)) {
1085         SourceRange = A->RegisterName.SourceRange;
1086         return true;
1087       }
1088       if (!RC.contains(Reg))
1089         return diagnoseRegisterClass(A->RegisterName);
1090       Arg = ArgDescriptor::createRegister(Reg);
1091     } else
1092       Arg = ArgDescriptor::createStack(A->StackOffset);
1093     // Check and apply the optional mask.
1094     if (A->Mask)
1095       Arg = ArgDescriptor::createArg(Arg, A->Mask.getValue());
1096
1097     MFI->NumUserSGPRs += UserSGPRs;
1098     MFI->NumSystemSGPRs += SystemSGPRs;
1099     return false;
1100   };
1101
1102   if (YamlMFI.ArgInfo &&
1103       (parseAndCheckArgument(YamlMFI.ArgInfo->PrivateSegmentBuffer,
1104                              AMDGPU::SReg_128RegClass,
1105                              MFI->ArgInfo.PrivateSegmentBuffer, 4, 0) ||
1106        parseAndCheckArgument(YamlMFI.ArgInfo->DispatchPtr,
1107                              AMDGPU::SReg_64RegClass, MFI->ArgInfo.DispatchPtr,
1108                              2, 0) ||
1109        parseAndCheckArgument(YamlMFI.ArgInfo->QueuePtr, AMDGPU::SReg_64RegClass,
1110                              MFI->ArgInfo.QueuePtr, 2, 0) ||
1111        parseAndCheckArgument(YamlMFI.ArgInfo->KernargSegmentPtr,
1112                              AMDGPU::SReg_64RegClass,
1113                              MFI->ArgInfo.KernargSegmentPtr, 2, 0) ||
1114        parseAndCheckArgument(YamlMFI.ArgInfo->DispatchID,
1115                              AMDGPU::SReg_64RegClass, MFI->ArgInfo.DispatchID,
1116                              2, 0) ||
1117        parseAndCheckArgument(YamlMFI.ArgInfo->FlatScratchInit,
1118                              AMDGPU::SReg_64RegClass,
1119                              MFI->ArgInfo.FlatScratchInit, 2, 0) ||
1120        parseAndCheckArgument(YamlMFI.ArgInfo->PrivateSegmentSize,
1121                              AMDGPU::SGPR_32RegClass,
1122                              MFI->ArgInfo.PrivateSegmentSize, 0, 0) ||
1123        parseAndCheckArgument(YamlMFI.ArgInfo->WorkGroupIDX,
1124                              AMDGPU::SGPR_32RegClass, MFI->ArgInfo.WorkGroupIDX,
1125                              0, 1) ||
1126        parseAndCheckArgument(YamlMFI.ArgInfo->WorkGroupIDY,
1127                              AMDGPU::SGPR_32RegClass, MFI->ArgInfo.WorkGroupIDY,
1128                              0, 1) ||
1129        parseAndCheckArgument(YamlMFI.ArgInfo->WorkGroupIDZ,
1130                              AMDGPU::SGPR_32RegClass, MFI->ArgInfo.WorkGroupIDZ,
1131                              0, 1) ||
1132        parseAndCheckArgument(YamlMFI.ArgInfo->WorkGroupInfo,
1133                              AMDGPU::SGPR_32RegClass,
1134                              MFI->ArgInfo.WorkGroupInfo, 0, 1) ||
1135        parseAndCheckArgument(YamlMFI.ArgInfo->PrivateSegmentWaveByteOffset,
1136                              AMDGPU::SGPR_32RegClass,
1137                              MFI->ArgInfo.PrivateSegmentWaveByteOffset, 0, 1) ||
1138        parseAndCheckArgument(YamlMFI.ArgInfo->ImplicitArgPtr,
1139                              AMDGPU::SReg_64RegClass,
1140                              MFI->ArgInfo.ImplicitArgPtr, 0, 0) ||
1141        parseAndCheckArgument(YamlMFI.ArgInfo->ImplicitBufferPtr,
1142                              AMDGPU::SReg_64RegClass,
1143                              MFI->ArgInfo.ImplicitBufferPtr, 2, 0) ||
1144        parseAndCheckArgument(YamlMFI.ArgInfo->WorkItemIDX,
1145                              AMDGPU::VGPR_32RegClass,
1146                              MFI->ArgInfo.WorkItemIDX, 0, 0) ||
1147        parseAndCheckArgument(YamlMFI.ArgInfo->WorkItemIDY,
1148                              AMDGPU::VGPR_32RegClass,
1149                              MFI->ArgInfo.WorkItemIDY, 0, 0) ||
1150        parseAndCheckArgument(YamlMFI.ArgInfo->WorkItemIDZ,
1151                              AMDGPU::VGPR_32RegClass,
1152                              MFI->ArgInfo.WorkItemIDZ, 0, 0)))
1153     return true;
1154
1155   MFI->Mode.IEEE = YamlMFI.Mode.IEEE;
1156   MFI->Mode.DX10Clamp = YamlMFI.Mode.DX10Clamp;
1157
1158   return false;
1159 }