X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=lib%2FCodeGen%2FLLVMTargetMachine.cpp;h=8afdf5dc46763ceb8b008106c98516b1b8ae24f7;hp=13cd45e592c1735ffac29c212225734e42b806ae;hb=ab08da75d70c76fd946483e29366264c92cc092b;hpb=254784f9e0ae59fc060ccd54b39cd1e94ac91356 diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp index 13cd45e592c..8afdf5dc467 100644 --- a/lib/CodeGen/LLVMTargetMachine.cpp +++ b/lib/CodeGen/LLVMTargetMachine.cpp @@ -12,85 +12,34 @@ //===----------------------------------------------------------------------===// #include "llvm/Target/TargetMachine.h" -#include "llvm/PassManager.h" -#include "llvm/Analysis/Verifier.h" -#include "llvm/Assembly/PrintModulePass.h" + +#include "llvm/Analysis/Passes.h" #include "llvm/CodeGen/AsmPrinter.h" +#include "llvm/CodeGen/JumpInstrTables.h" #include "llvm/CodeGen/MachineFunctionAnalysis.h" #include "llvm/CodeGen/MachineModuleInfo.h" -#include "llvm/CodeGen/GCStrategy.h" #include "llvm/CodeGen/Passes.h" -#include "llvm/Target/TargetLowering.h" -#include "llvm/Target/TargetOptions.h" +#include "llvm/IR/IRPrintingPasses.h" +#include "llvm/IR/Verifier.h" #include "llvm/MC/MCAsmInfo.h" +#include "llvm/MC/MCContext.h" +#include "llvm/MC/MCInstrInfo.h" #include "llvm/MC/MCStreamer.h" -#include "llvm/Target/TargetAsmInfo.h" -#include "llvm/Target/TargetData.h" -#include "llvm/Target/TargetRegistry.h" -#include "llvm/Transforms/Scalar.h" -#include "llvm/ADT/OwningPtr.h" +#include "llvm/MC/MCSubtargetInfo.h" +#include "llvm/PassManager.h" #include "llvm/Support/CommandLine.h" -#include "llvm/Support/Debug.h" +#include "llvm/Support/ErrorHandling.h" #include "llvm/Support/FormattedStream.h" -#include "llvm/Support/StandardPasses.h" +#include "llvm/Support/TargetRegistry.h" +#include "llvm/Target/TargetInstrInfo.h" +#include "llvm/Target/TargetLowering.h" +#include "llvm/Target/TargetLoweringObjectFile.h" +#include "llvm/Target/TargetOptions.h" +#include "llvm/Target/TargetRegisterInfo.h" +#include "llvm/Target/TargetSubtargetInfo.h" +#include "llvm/Transforms/Scalar.h" using namespace llvm; -namespace llvm { - bool EnableFastISel; -} - -static cl::opt DisablePostRA("disable-post-ra", cl::Hidden, - cl::desc("Disable Post Regalloc")); -static cl::opt DisableBranchFold("disable-branch-fold", cl::Hidden, - cl::desc("Disable branch folding")); -static cl::opt DisableTailDuplicate("disable-tail-duplicate", cl::Hidden, - cl::desc("Disable tail duplication")); -static cl::opt DisableEarlyTailDup("disable-early-taildup", cl::Hidden, - cl::desc("Disable pre-register allocation tail duplication")); -static cl::opt DisableCodePlace("disable-code-place", cl::Hidden, - cl::desc("Disable code placement")); -static cl::opt DisableSSC("disable-ssc", cl::Hidden, - cl::desc("Disable Stack Slot Coloring")); -static cl::opt DisableMachineLICM("disable-machine-licm", cl::Hidden, - cl::desc("Disable Machine LICM")); -static cl::opt DisablePostRAMachineLICM("disable-postra-machine-licm", - cl::Hidden, - cl::desc("Disable Machine LICM")); -static cl::opt DisableMachineSink("disable-machine-sink", cl::Hidden, - cl::desc("Disable Machine Sinking")); -static cl::opt DisableLSR("disable-lsr", cl::Hidden, - cl::desc("Disable Loop Strength Reduction Pass")); -static cl::opt DisableCGP("disable-cgp", cl::Hidden, - cl::desc("Disable Codegen Prepare")); -static cl::opt PrintLSR("print-lsr-output", cl::Hidden, - cl::desc("Print LLVM IR produced by the loop-reduce pass")); -static cl::opt PrintISelInput("print-isel-input", cl::Hidden, - cl::desc("Print LLVM IR input to isel pass")); -static cl::opt PrintGCInfo("print-gc", cl::Hidden, - cl::desc("Dump garbage collector data")); -static cl::opt ShowMCEncoding("show-mc-encoding", cl::Hidden, - cl::desc("Show encoding in .s output")); -static cl::opt ShowMCInst("show-mc-inst", cl::Hidden, - cl::desc("Show instruction structure in .s output")); -static cl::opt EnableMCLogging("enable-mc-api-logging", cl::Hidden, - cl::desc("Enable MC API logging")); -static cl::opt VerifyMachineCode("verify-machineinstrs", cl::Hidden, - cl::desc("Verify generated machine code"), - cl::init(getenv("LLVM_VERIFY_MACHINEINSTRS")!=NULL)); - -static cl::opt -AsmVerbose("asm-verbose", cl::desc("Add comments to directives."), - cl::init(cl::BOU_UNSET)); - -static bool getVerboseAsm() { - switch (AsmVerbose) { - default: - case cl::BOU_UNSET: return TargetMachine::getAsmVerbosityDefault(); - case cl::BOU_TRUE: return true; - case cl::BOU_FALSE: return false; - } -} - // Enable or disable FastISel. Both options are needed, because // FastISel is enabled by default with -fast, and we wish to be // able to enable or disable fast-isel independently from -O0. @@ -98,129 +47,186 @@ static cl::opt EnableFastISelOption("fast-isel", cl::Hidden, cl::desc("Enable the \"fast\" instruction selector")); -LLVMTargetMachine::LLVMTargetMachine(const Target &T, - const std::string &Triple) - : TargetMachine(T), TargetTriple(Triple) { - AsmInfo = T.createAsmInfo(TargetTriple); +void LLVMTargetMachine::initAsmInfo() { + MCAsmInfo *TmpAsmInfo = TheTarget.createMCAsmInfo( + *getSubtargetImpl()->getRegisterInfo(), getTargetTriple()); + // TargetSelect.h moved to a different directory between LLVM 2.9 and 3.0, + // and if the old one gets included then MCAsmInfo will be NULL and + // we'll crash later. + // Provide the user with a useful error message about what's wrong. + assert(TmpAsmInfo && "MCAsmInfo not initialized. " + "Make sure you include the correct TargetSelect.h" + "and that InitializeAllTargetMCs() is being invoked!"); + + if (Options.DisableIntegratedAS) + TmpAsmInfo->setUseIntegratedAssembler(false); + + if (Options.CompressDebugSections) + TmpAsmInfo->setCompressDebugSections(true); + + AsmInfo = TmpAsmInfo; } -// Set the default code model for the JIT for a generic target. -// FIXME: Is small right here? or .is64Bit() ? Large : Small? -void LLVMTargetMachine::setCodeModelForJIT() { - setCodeModel(CodeModel::Small); +LLVMTargetMachine::LLVMTargetMachine(const Target &T, StringRef Triple, + StringRef CPU, StringRef FS, + TargetOptions Options, + Reloc::Model RM, CodeModel::Model CM, + CodeGenOpt::Level OL) + : TargetMachine(T, Triple, CPU, FS, Options) { + CodeGenInfo = T.createMCCodeGenInfo(Triple, RM, CM, OL); } -// Set the default code model for static compilation for a generic target. -void LLVMTargetMachine::setCodeModelForStatic() { - setCodeModel(CodeModel::Small); +void LLVMTargetMachine::addAnalysisPasses(PassManagerBase &PM) { + PM.add(createBasicTargetTransformInfoPass(this)); +} + +/// addPassesToX helper drives creation and initialization of TargetPassConfig. +static MCContext *addPassesToGenerateCode(LLVMTargetMachine *TM, + PassManagerBase &PM, + bool DisableVerify, + AnalysisID StartAfter, + AnalysisID StopAfter) { + + // Add internal analysis passes from the target machine. + TM->addAnalysisPasses(PM); + + // Targets may override createPassConfig to provide a target-specific + // subclass. + TargetPassConfig *PassConfig = TM->createPassConfig(PM); + PassConfig->setStartStopPasses(StartAfter, StopAfter); + + // Set PassConfig options provided by TargetMachine. + PassConfig->setDisableVerify(DisableVerify); + + PM.add(PassConfig); + + PassConfig->addIRPasses(); + + PassConfig->addCodeGenPrepare(); + + PassConfig->addPassesToHandleExceptions(); + + PassConfig->addISelPrepare(); + + // Install a MachineModuleInfo class, which is an immutable pass that holds + // all the per-module stuff we're generating, including MCContext. + MachineModuleInfo *MMI = new MachineModuleInfo( + *TM->getMCAsmInfo(), *TM->getSubtargetImpl()->getRegisterInfo(), + &TM->getSubtargetImpl()->getTargetLowering()->getObjFileLowering()); + PM.add(MMI); + + // Set up a MachineFunction for the rest of CodeGen to work on. + PM.add(new MachineFunctionAnalysis(*TM)); + + // Enable FastISel with -fast, but allow that to be overridden. + if (EnableFastISelOption == cl::BOU_TRUE || + (TM->getOptLevel() == CodeGenOpt::None && + EnableFastISelOption != cl::BOU_FALSE)) + TM->setFastISel(true); + + // Ask the target for an isel. + if (PassConfig->addInstSelector()) + return nullptr; + + PassConfig->addMachinePasses(); + + PassConfig->setInitialized(); + + return &MMI->getContext(); } bool LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM, formatted_raw_ostream &Out, CodeGenFileType FileType, - CodeGenOpt::Level OptLevel, - bool DisableVerify) { + bool DisableVerify, + AnalysisID StartAfter, + AnalysisID StopAfter) { + // Passes to handle jumptable function annotations. These can't be handled at + // JIT time, so we don't add them directly to addPassesToGenerateCode. + PM.add(createJumpInstrTableInfoPass()); + PM.add(createJumpInstrTablesPass(Options.JTType)); + // Add common CodeGen passes. - MCContext *Context = 0; - if (addCommonCodeGenPasses(PM, OptLevel, DisableVerify, Context)) + MCContext *Context = addPassesToGenerateCode(this, PM, DisableVerify, + StartAfter, StopAfter); + if (!Context) return true; - assert(Context != 0 && "Failed to get MCContext"); - if (hasMCSaveTempLabels()) + if (StopAfter) { + // FIXME: The intent is that this should eventually write out a YAML file, + // containing the LLVM IR, the machine-level IR (when stopping after a + // machine-level pass), and whatever other information is needed to + // deserialize the code and resume compilation. For now, just write the + // LLVM IR. + PM.add(createPrintModulePass(Out)); + return false; + } + + if (Options.MCOptions.MCSaveTempLabels) Context->setAllowTemporaryLabels(false); + const MCSubtargetInfo &STI = getSubtarget(); const MCAsmInfo &MAI = *getMCAsmInfo(); - OwningPtr AsmStreamer; + const MCRegisterInfo &MRI = *getSubtargetImpl()->getRegisterInfo(); + const MCInstrInfo &MII = *getSubtargetImpl()->getInstrInfo(); + std::unique_ptr AsmStreamer; switch (FileType) { - default: return true; case CGFT_AssemblyFile: { MCInstPrinter *InstPrinter = - getTarget().createMCInstPrinter(*this, MAI.getAssemblerDialect(), MAI); + getTarget().createMCInstPrinter(MAI.getAssemblerDialect(), MAI, + MII, MRI, STI); // Create a code emitter if asked to show the encoding. - MCCodeEmitter *MCE = 0; - TargetAsmBackend *TAB = 0; - if (ShowMCEncoding) { - MCE = getTarget().createCodeEmitter(*this, *Context); - TAB = getTarget().createAsmBackend(TargetTriple); - } - - MCStreamer *S = getTarget().createAsmStreamer(*Context, Out, - getVerboseAsm(), - hasMCUseLoc(), - hasMCUseCFI(), - InstPrinter, - MCE, TAB, - ShowMCInst); + MCCodeEmitter *MCE = nullptr; + if (Options.MCOptions.ShowMCEncoding) + MCE = getTarget().createMCCodeEmitter(MII, MRI, STI, *Context); + + MCAsmBackend *MAB = getTarget().createMCAsmBackend(MRI, getTargetTriple(), + TargetCPU); + MCStreamer *S = getTarget().createAsmStreamer( + *Context, Out, Options.MCOptions.AsmVerbose, + Options.MCOptions.MCUseDwarfDirectory, InstPrinter, MCE, MAB, + Options.MCOptions.ShowMCInst); AsmStreamer.reset(S); break; } case CGFT_ObjectFile: { // Create the code emitter for the target if it exists. If not, .o file // emission fails. - MCCodeEmitter *MCE = getTarget().createCodeEmitter(*this, *Context); - TargetAsmBackend *TAB = getTarget().createAsmBackend(TargetTriple); - if (MCE == 0 || TAB == 0) + MCCodeEmitter *MCE = getTarget().createMCCodeEmitter(MII, MRI, STI, + *Context); + MCAsmBackend *MAB = getTarget().createMCAsmBackend(MRI, getTargetTriple(), + TargetCPU); + if (!MCE || !MAB) return true; - AsmStreamer.reset(getTarget().createObjectStreamer(TargetTriple, *Context, - *TAB, Out, MCE, - hasMCRelaxAll(), - hasMCNoExecStack())); - AsmStreamer.get()->InitSections(); + AsmStreamer.reset( + getTarget() + .createMCObjectStreamer(getTargetTriple(), *Context, *MAB, Out, MCE, + STI, Options.MCOptions.MCRelaxAll)); break; } case CGFT_Null: // The Null output is intended for use for performance analysis and testing, // not real users. - AsmStreamer.reset(createNullStreamer(*Context)); + AsmStreamer.reset(getTarget().createNullStreamer(*Context)); break; } - if (EnableMCLogging) - AsmStreamer.reset(createLoggingStreamer(AsmStreamer.take(), errs())); - // Create the AsmPrinter, which takes ownership of AsmStreamer if successful. FunctionPass *Printer = getTarget().createAsmPrinter(*this, *AsmStreamer); - if (Printer == 0) + if (!Printer) return true; // If successful, createAsmPrinter took ownership of AsmStreamer. - AsmStreamer.take(); + AsmStreamer.release(); PM.add(Printer); - // Make sure the code model is set. - setCodeModelForStatic(); - PM.add(createGCInfoDeleter()); return false; } -/// addPassesToEmitMachineCode - Add passes to the specified pass manager to -/// get machine code emitted. This uses a JITCodeEmitter object to handle -/// actually outputting the machine code and resolving things like the address -/// of functions. This method should returns true if machine code emission is -/// not supported. -/// -bool LLVMTargetMachine::addPassesToEmitMachineCode(PassManagerBase &PM, - JITCodeEmitter &JCE, - CodeGenOpt::Level OptLevel, - bool DisableVerify) { - // Make sure the code model is set. - setCodeModelForJIT(); - - // Add common CodeGen passes. - MCContext *Ctx = 0; - if (addCommonCodeGenPasses(PM, OptLevel, DisableVerify, Ctx)) - return true; - - addCodeEmitter(PM, OptLevel, JCE); - PM.add(createGCInfoDeleter()); - - return false; // success! -} - /// addPassesToEmitMC - Add passes to the specified pass manager to get /// machine code emitted with the MCJIT. This method returns true if machine /// code is not supported. It fills the MCContext Ctx pointer which can be @@ -229,257 +235,41 @@ bool LLVMTargetMachine::addPassesToEmitMachineCode(PassManagerBase &PM, bool LLVMTargetMachine::addPassesToEmitMC(PassManagerBase &PM, MCContext *&Ctx, raw_ostream &Out, - CodeGenOpt::Level OptLevel, bool DisableVerify) { // Add common CodeGen passes. - if (addCommonCodeGenPasses(PM, OptLevel, DisableVerify, Ctx)) + Ctx = addPassesToGenerateCode(this, PM, DisableVerify, nullptr, nullptr); + if (!Ctx) return true; - if (hasMCSaveTempLabels()) + if (Options.MCOptions.MCSaveTempLabels) Ctx->setAllowTemporaryLabels(false); // Create the code emitter for the target if it exists. If not, .o file // emission fails. - MCCodeEmitter *MCE = getTarget().createCodeEmitter(*this, *Ctx); - TargetAsmBackend *TAB = getTarget().createAsmBackend(TargetTriple); - if (MCE == 0 || TAB == 0) + const MCRegisterInfo &MRI = *getSubtargetImpl()->getRegisterInfo(); + const MCSubtargetInfo &STI = getSubtarget(); + MCCodeEmitter *MCE = getTarget().createMCCodeEmitter( + *getSubtargetImpl()->getInstrInfo(), MRI, STI, *Ctx); + MCAsmBackend *MAB = getTarget().createMCAsmBackend(MRI, getTargetTriple(), + TargetCPU); + if (!MCE || !MAB) return true; - OwningPtr AsmStreamer; - AsmStreamer.reset(getTarget().createObjectStreamer(TargetTriple, *Ctx, - *TAB, Out, MCE, - hasMCRelaxAll(), - hasMCNoExecStack())); - AsmStreamer.get()->InitSections(); + std::unique_ptr AsmStreamer; + AsmStreamer.reset(getTarget() + .createMCObjectStreamer(getTargetTriple(), *Ctx, *MAB, + Out, MCE, STI, + Options.MCOptions.MCRelaxAll)); // Create the AsmPrinter, which takes ownership of AsmStreamer if successful. FunctionPass *Printer = getTarget().createAsmPrinter(*this, *AsmStreamer); - if (Printer == 0) + if (!Printer) return true; // If successful, createAsmPrinter took ownership of AsmStreamer. - AsmStreamer.take(); + AsmStreamer.release(); PM.add(Printer); - // Make sure the code model is set. - setCodeModelForJIT(); - return false; // success! } - -static void printNoVerify(PassManagerBase &PM, const char *Banner) { - if (PrintMachineCode) - PM.add(createMachineFunctionPrinterPass(dbgs(), Banner)); -} - -static void printAndVerify(PassManagerBase &PM, - const char *Banner) { - if (PrintMachineCode) - PM.add(createMachineFunctionPrinterPass(dbgs(), Banner)); - - if (VerifyMachineCode) - PM.add(createMachineVerifierPass(Banner)); -} - -/// addCommonCodeGenPasses - Add standard LLVM codegen passes used for both -/// emitting to assembly files or machine code output. -/// -bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM, - CodeGenOpt::Level OptLevel, - bool DisableVerify, - MCContext *&OutContext) { - // Standard LLVM-Level Passes. - - // Basic AliasAnalysis support. - createStandardAliasAnalysisPasses(&PM); - - // Before running any passes, run the verifier to determine if the input - // coming from the front-end and/or optimizer is valid. - if (!DisableVerify) - PM.add(createVerifierPass()); - - // Run loop strength reduction before anything else. - if (OptLevel != CodeGenOpt::None && !DisableLSR) { - PM.add(createLoopStrengthReducePass(getTargetLowering())); - if (PrintLSR) - PM.add(createPrintFunctionPass("\n\n*** Code after LSR ***\n", &dbgs())); - } - - PM.add(createGCLoweringPass()); - - // Make sure that no unreachable blocks are instruction selected. - PM.add(createUnreachableBlockEliminationPass()); - - // Turn exception handling constructs into something the code generators can - // handle. - switch (getMCAsmInfo()->getExceptionHandlingType()) { - case ExceptionHandling::SjLj: - // SjLj piggy-backs on dwarf for this bit. The cleanups done apply to both - // Dwarf EH prepare needs to be run after SjLj prepare. Otherwise, - // catch info can get misplaced when a selector ends up more than one block - // removed from the parent invoke(s). This could happen when a landing - // pad is shared by multiple invokes and is also a target of a normal - // edge from elsewhere. - PM.add(createSjLjEHPass(getTargetLowering())); - // FALLTHROUGH - case ExceptionHandling::DwarfCFI: - case ExceptionHandling::ARM: - PM.add(createDwarfEHPass(this)); - break; - case ExceptionHandling::None: - PM.add(createLowerInvokePass(getTargetLowering())); - - // The lower invoke pass may create unreachable code. Remove it. - PM.add(createUnreachableBlockEliminationPass()); - break; - } - - if (OptLevel != CodeGenOpt::None && !DisableCGP) - PM.add(createCodeGenPreparePass(getTargetLowering())); - - PM.add(createStackProtectorPass(getTargetLowering())); - - addPreISel(PM, OptLevel); - - if (PrintISelInput) - PM.add(createPrintFunctionPass("\n\n" - "*** Final LLVM Code input to ISel ***\n", - &dbgs())); - - // All passes which modify the LLVM IR are now complete; run the verifier - // to ensure that the IR is valid. - if (!DisableVerify) - PM.add(createVerifierPass()); - - // Standard Lower-Level Passes. - - // Install a MachineModuleInfo class, which is an immutable pass that holds - // all the per-module stuff we're generating, including MCContext. - TargetAsmInfo *TAI = new TargetAsmInfo(*this); - MachineModuleInfo *MMI = new MachineModuleInfo(*getMCAsmInfo(), TAI); - PM.add(MMI); - OutContext = &MMI->getContext(); // Return the MCContext specifically by-ref. - - // Set up a MachineFunction for the rest of CodeGen to work on. - PM.add(new MachineFunctionAnalysis(*this, OptLevel)); - - // Enable FastISel with -fast, but allow that to be overridden. - if (EnableFastISelOption == cl::BOU_TRUE || - (OptLevel == CodeGenOpt::None && EnableFastISelOption != cl::BOU_FALSE)) - EnableFastISel = true; - - // Ask the target for an isel. - if (addInstSelector(PM, OptLevel)) - return true; - - // Print the instruction selected machine code... - printAndVerify(PM, "After Instruction Selection"); - - // Expand pseudo-instructions emitted by ISel. - PM.add(createExpandISelPseudosPass()); - - // Optimize PHIs before DCE: removing dead PHI cycles may make more - // instructions dead. - if (OptLevel != CodeGenOpt::None) - PM.add(createOptimizePHIsPass()); - - // If the target requests it, assign local variables to stack slots relative - // to one another and simplify frame index references where possible. - PM.add(createLocalStackSlotAllocationPass()); - - if (OptLevel != CodeGenOpt::None) { - // With optimization, dead code should already be eliminated. However - // there is one known exception: lowered code for arguments that are only - // used by tail calls, where the tail calls reuse the incoming stack - // arguments directly (see t11 in test/CodeGen/X86/sibcall.ll). - PM.add(createDeadMachineInstructionElimPass()); - printAndVerify(PM, "After codegen DCE pass"); - - if (!DisableMachineLICM) - PM.add(createMachineLICMPass()); - PM.add(createMachineCSEPass()); - if (!DisableMachineSink) - PM.add(createMachineSinkingPass()); - printAndVerify(PM, "After Machine LICM, CSE and Sinking passes"); - - PM.add(createPeepholeOptimizerPass()); - printAndVerify(PM, "After codegen peephole optimization pass"); - } - - // Pre-ra tail duplication. - if (OptLevel != CodeGenOpt::None && !DisableEarlyTailDup) { - PM.add(createTailDuplicatePass(true)); - printAndVerify(PM, "After Pre-RegAlloc TailDuplicate"); - } - - // Run pre-ra passes. - if (addPreRegAlloc(PM, OptLevel)) - printAndVerify(PM, "After PreRegAlloc passes"); - - // Perform register allocation. - PM.add(createRegisterAllocator(OptLevel)); - printAndVerify(PM, "After Register Allocation"); - - // Perform stack slot coloring and post-ra machine LICM. - if (OptLevel != CodeGenOpt::None) { - // FIXME: Re-enable coloring with register when it's capable of adding - // kill markers. - if (!DisableSSC) - PM.add(createStackSlotColoringPass(false)); - - // Run post-ra machine LICM to hoist reloads / remats. - if (!DisablePostRAMachineLICM) - PM.add(createMachineLICMPass(false)); - - printAndVerify(PM, "After StackSlotColoring and postra Machine LICM"); - } - - // Run post-ra passes. - if (addPostRegAlloc(PM, OptLevel)) - printAndVerify(PM, "After PostRegAlloc passes"); - - PM.add(createLowerSubregsPass()); - printAndVerify(PM, "After LowerSubregs"); - - // Insert prolog/epilog code. Eliminate abstract frame index references... - PM.add(createPrologEpilogCodeInserter()); - printAndVerify(PM, "After PrologEpilogCodeInserter"); - - // Run pre-sched2 passes. - if (addPreSched2(PM, OptLevel)) - printAndVerify(PM, "After PreSched2 passes"); - - // Second pass scheduler. - if (OptLevel != CodeGenOpt::None && !DisablePostRA) { - PM.add(createPostRAScheduler(OptLevel)); - printAndVerify(PM, "After PostRAScheduler"); - } - - // Branch folding must be run after regalloc and prolog/epilog insertion. - if (OptLevel != CodeGenOpt::None && !DisableBranchFold) { - PM.add(createBranchFoldingPass(getEnableTailMergeDefault())); - printNoVerify(PM, "After BranchFolding"); - } - - // Tail duplication. - if (OptLevel != CodeGenOpt::None && !DisableTailDuplicate) { - PM.add(createTailDuplicatePass(false)); - printNoVerify(PM, "After TailDuplicate"); - } - - PM.add(createGCMachineCodeAnalysisPass()); - - if (PrintGCInfo) - PM.add(createGCInfoPrinter(dbgs())); - - if (OptLevel != CodeGenOpt::None && !DisableCodePlace) { - PM.add(createCodePlacementOptPass()); - printNoVerify(PM, "After CodePlacementOpt"); - } - - if (addPreEmitPass(PM, OptLevel)) - printNoVerify(PM, "After PreEmit passes"); - - return false; -}