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Diffstat (limited to 'llvm/lib/CodeGen/TargetMachine.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/TargetMachine.cpp | 420 |
1 files changed, 0 insertions, 420 deletions
diff --git a/llvm/lib/CodeGen/TargetMachine.cpp b/llvm/lib/CodeGen/TargetMachine.cpp deleted file mode 100644 index e789273753f..00000000000 --- a/llvm/lib/CodeGen/TargetMachine.cpp +++ /dev/null @@ -1,420 +0,0 @@ -//===-- TargetMachine.cpp - Implement the TargetMachine class -------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -/// \file Implements the TargetMachine class. -// -//===----------------------------------------------------------------------===// - -#include "llvm/Target/TargetMachine.h" - -#include "llvm/Analysis/Passes.h" -#include "llvm/CodeGen/AsmPrinter.h" -#include "llvm/CodeGen/BasicTTIImpl.h" -#include "llvm/CodeGen/MachineModuleInfo.h" -#include "llvm/CodeGen/Passes.h" -#include "llvm/CodeGen/TargetPassConfig.h" -#include "llvm/IR/IRPrintingPasses.h" -#include "llvm/IR/LegacyPassManager.h" -#include "llvm/IR/Mangler.h" -#include "llvm/IR/Verifier.h" -#include "llvm/MC/MCAsmBackend.h" -#include "llvm/MC/MCAsmInfo.h" -#include "llvm/MC/MCCodeEmitter.h" -#include "llvm/MC/MCContext.h" -#include "llvm/MC/MCInstrInfo.h" -#include "llvm/MC/MCStreamer.h" -#include "llvm/MC/MCSubtargetInfo.h" -#include "llvm/Support/CommandLine.h" -#include "llvm/Support/ErrorHandling.h" -#include "llvm/Support/FormattedStream.h" -#include "llvm/Support/TargetRegistry.h" -#include "llvm/Target/TargetLoweringObjectFile.h" -#include "llvm/Target/TargetOptions.h" -#include "llvm/Transforms/Scalar.h" -using namespace llvm; - -TargetMachine::TargetMachine(const Target &T, StringRef DataLayoutString, - const Triple &TT, StringRef CPU, StringRef FS, - const TargetOptions &Options, Reloc::Model RM, - CodeModel::Model CM, CodeGenOpt::Level OL) - : TheTarget(T), DL(DataLayoutString), TargetTriple(TT), TargetCPU(CPU), - TargetFS(FS), RM(RM), CMModel(CM), OptLevel(OL), AsmInfo(nullptr), - MRI(nullptr), MII(nullptr), STI(nullptr), RequireStructuredCFG(false), - DefaultOptions(Options), Options(Options) { -} - -TargetMachine::~TargetMachine() { - delete AsmInfo; - delete MRI; - delete MII; - delete STI; -} - -bool TargetMachine::isPositionIndependent() const { - return getRelocationModel() == Reloc::PIC_; -} - -// FIXME: This function needs to go away for a number of reasons: -// a) global state on the TargetMachine is terrible in general, -// b) these target options should be passed only on the function -// and not on the TargetMachine (via TargetOptions) at all. -void TargetMachine::resetTargetOptions(const Function &F) const { -#define RESET_OPTION(X, Y) \ - do { \ - if (F.hasFnAttribute(Y)) \ - Options.X = (F.getFnAttribute(Y).getValueAsString() == "true"); \ - else \ - Options.X = DefaultOptions.X; \ - } while (0) - - RESET_OPTION(UnsafeFPMath, "unsafe-fp-math"); - RESET_OPTION(NoInfsFPMath, "no-infs-fp-math"); - RESET_OPTION(NoNaNsFPMath, "no-nans-fp-math"); - RESET_OPTION(NoSignedZerosFPMath, "no-signed-zeros-fp-math"); - RESET_OPTION(NoTrappingFPMath, "no-trapping-math"); - - StringRef Denormal = - F.getFnAttribute("denormal-fp-math").getValueAsString(); - if (Denormal == "ieee") - Options.FPDenormalMode = FPDenormal::IEEE; - else if (Denormal == "preserve-sign") - Options.FPDenormalMode = FPDenormal::PreserveSign; - else if (Denormal == "positive-zero") - Options.FPDenormalMode = FPDenormal::PositiveZero; - else - Options.FPDenormalMode = DefaultOptions.FPDenormalMode; -} - -Reloc::Model TargetMachine::getRelocationModel() const { return RM; } - -CodeModel::Model TargetMachine::getCodeModel() const { return CMModel; } - -/// Get the IR-specified TLS model for Var. -static TLSModel::Model getSelectedTLSModel(const GlobalValue *GV) { - switch (GV->getThreadLocalMode()) { - case GlobalVariable::NotThreadLocal: - llvm_unreachable("getSelectedTLSModel for non-TLS variable"); - break; - case GlobalVariable::GeneralDynamicTLSModel: - return TLSModel::GeneralDynamic; - case GlobalVariable::LocalDynamicTLSModel: - return TLSModel::LocalDynamic; - case GlobalVariable::InitialExecTLSModel: - return TLSModel::InitialExec; - case GlobalVariable::LocalExecTLSModel: - return TLSModel::LocalExec; - } - llvm_unreachable("invalid TLS model"); -} - -bool TargetMachine::shouldAssumeDSOLocal(const Module &M, - const GlobalValue *GV) const { - Reloc::Model RM = getRelocationModel(); - const Triple &TT = getTargetTriple(); - - // DLLImport explicitly marks the GV as external. - if (GV && GV->hasDLLImportStorageClass()) - return false; - - // Every other GV is local on COFF. - // Make an exception for windows OS in the triple: Some firmwares builds use - // *-win32-macho triples. This (accidentally?) produced windows relocations - // without GOT tables in older clang versions; Keep this behaviour. - if (TT.isOSBinFormatCOFF() || (TT.isOSWindows() && TT.isOSBinFormatMachO())) - return true; - - if (GV && (GV->hasLocalLinkage() || !GV->hasDefaultVisibility())) - return true; - - if (TT.isOSBinFormatMachO()) { - if (RM == Reloc::Static) - return true; - return GV && GV->isStrongDefinitionForLinker(); - } - - assert(TT.isOSBinFormatELF()); - assert(RM != Reloc::DynamicNoPIC); - - bool IsExecutable = - RM == Reloc::Static || M.getPIELevel() != PIELevel::Default; - if (IsExecutable) { - // If the symbol is defined, it cannot be preempted. - if (GV && !GV->isDeclarationForLinker()) - return true; - - bool IsTLS = GV && GV->isThreadLocal(); - bool IsAccessViaCopyRelocs = Options.MCOptions.MCPIECopyRelocations && GV && - isa<GlobalVariable>(GV) && - !GV->hasExternalWeakLinkage(); - Triple::ArchType Arch = TT.getArch(); - bool IsPPC = - Arch == Triple::ppc || Arch == Triple::ppc64 || Arch == Triple::ppc64le; - // Check if we can use copy relocations. PowerPC has no copy relocations. - if (!IsTLS && !IsPPC && (RM == Reloc::Static || IsAccessViaCopyRelocs)) - return true; - } - - // ELF supports preemption of other symbols. - return false; -} - -TLSModel::Model TargetMachine::getTLSModel(const GlobalValue *GV) const { - bool IsPIE = GV->getParent()->getPIELevel() != PIELevel::Default; - Reloc::Model RM = getRelocationModel(); - bool IsSharedLibrary = RM == Reloc::PIC_ && !IsPIE; - bool IsLocal = shouldAssumeDSOLocal(*GV->getParent(), GV); - - TLSModel::Model Model; - if (IsSharedLibrary) { - if (IsLocal) - Model = TLSModel::LocalDynamic; - else - Model = TLSModel::GeneralDynamic; - } else { - if (IsLocal) - Model = TLSModel::LocalExec; - else - Model = TLSModel::InitialExec; - } - - // If the user specified a more specific model, use that. - TLSModel::Model SelectedModel = getSelectedTLSModel(GV); - if (SelectedModel > Model) - return SelectedModel; - - return Model; -} - -CodeGenOpt::Level TargetMachine::getOptLevel() const { return OptLevel; } - -void TargetMachine::setOptLevel(CodeGenOpt::Level Level) { OptLevel = Level; } - -void TargetMachine::getNameWithPrefix(SmallVectorImpl<char> &Name, - const GlobalValue *GV, Mangler &Mang, - bool MayAlwaysUsePrivate) const { - if (MayAlwaysUsePrivate || !GV->hasPrivateLinkage()) { - // Simple case: If GV is not private, it is not important to find out if - // private labels are legal in this case or not. - Mang.getNameWithPrefix(Name, GV, false); - return; - } - const TargetLoweringObjectFile *TLOF = getObjFileLowering(); - TLOF->getNameWithPrefix(Name, GV, *this); -} - -MCSymbol *TargetMachine::getSymbol(const GlobalValue *GV) const { - const TargetLoweringObjectFile *TLOF = getObjFileLowering(); - SmallString<128> NameStr; - getNameWithPrefix(NameStr, GV, TLOF->getMangler()); - return TLOF->getContext().getOrCreateSymbol(NameStr); -} - -void TargetMachine::initAsmInfo() { - MRI = TheTarget.createMCRegInfo(getTargetTriple().str()); - MII = TheTarget.createMCInstrInfo(); - // FIXME: Having an MCSubtargetInfo on the target machine is a hack due - // to some backends having subtarget feature dependent module level - // code generation. This is similar to the hack in the AsmPrinter for - // module level assembly etc. - STI = TheTarget.createMCSubtargetInfo(getTargetTriple().str(), getTargetCPU(), - getTargetFeatureString()); - - MCAsmInfo *TmpAsmInfo = - TheTarget.createMCAsmInfo(*MRI, getTargetTriple().str()); - // 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); - - TmpAsmInfo->setPreserveAsmComments(Options.MCOptions.PreserveAsmComments); - - TmpAsmInfo->setCompressDebugSections(Options.CompressDebugSections); - - TmpAsmInfo->setRelaxELFRelocations(Options.RelaxELFRelocations); - - if (Options.ExceptionModel != ExceptionHandling::None) - TmpAsmInfo->setExceptionsType(Options.ExceptionModel); - - AsmInfo = TmpAsmInfo; -} - -TargetIRAnalysis TargetMachine::getTargetIRAnalysis() { - return TargetIRAnalysis([this](const Function &F) { - return TargetTransformInfo(BasicTTIImpl(this, F)); - }); -} - -/// addPassesToX helper drives creation and initialization of TargetPassConfig. -static MCContext * -addPassesToGenerateCode(TargetMachine *TM, PassManagerBase &PM, - bool DisableVerify, bool &WillCompleteCodeGenPipeline, - raw_pwrite_stream &Out, MachineModuleInfo *MMI) { - // Targets may override createPassConfig to provide a target-specific - // subclass. - TargetPassConfig *PassConfig = TM->createPassConfig(PM); - // Set PassConfig options provided by TargetMachine. - PassConfig->setDisableVerify(DisableVerify); - WillCompleteCodeGenPipeline = PassConfig->willCompleteCodeGenPipeline(); - PM.add(PassConfig); - if (!MMI) - MMI = new MachineModuleInfo(TM); - PM.add(MMI); - - if (PassConfig->addISelPasses()) - return nullptr; - PassConfig->addMachinePasses(); - PassConfig->setInitialized(); - if (!WillCompleteCodeGenPipeline) - PM.add(createPrintMIRPass(Out)); - - return &MMI->getContext(); -} - -bool TargetMachine::addAsmPrinter(PassManagerBase &PM, - raw_pwrite_stream &Out, CodeGenFileType FileType, - MCContext &Context) { - if (Options.MCOptions.MCSaveTempLabels) - Context.setAllowTemporaryLabels(false); - - const MCSubtargetInfo &STI = *getMCSubtargetInfo(); - const MCAsmInfo &MAI = *getMCAsmInfo(); - const MCRegisterInfo &MRI = *getMCRegisterInfo(); - const MCInstrInfo &MII = *getMCInstrInfo(); - - std::unique_ptr<MCStreamer> AsmStreamer; - - switch (FileType) { - case CGFT_AssemblyFile: { - MCInstPrinter *InstPrinter = getTarget().createMCInstPrinter( - getTargetTriple(), MAI.getAssemblerDialect(), MAI, MII, MRI); - - // Create a code emitter if asked to show the encoding. - MCCodeEmitter *MCE = nullptr; - if (Options.MCOptions.ShowMCEncoding) - MCE = getTarget().createMCCodeEmitter(MII, MRI, Context); - - MCAsmBackend *MAB = - getTarget().createMCAsmBackend(MRI, getTargetTriple().str(), TargetCPU, - Options.MCOptions); - auto FOut = llvm::make_unique<formatted_raw_ostream>(Out); - MCStreamer *S = getTarget().createAsmStreamer( - Context, std::move(FOut), 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().createMCCodeEmitter(MII, MRI, Context); - MCAsmBackend *MAB = - getTarget().createMCAsmBackend(MRI, getTargetTriple().str(), TargetCPU, - Options.MCOptions); - if (!MCE || !MAB) - return true; - - // Don't waste memory on names of temp labels. - Context.setUseNamesOnTempLabels(false); - - Triple T(getTargetTriple().str()); - AsmStreamer.reset(getTarget().createMCObjectStreamer( - T, Context, std::unique_ptr<MCAsmBackend>(MAB), Out, - std::unique_ptr<MCCodeEmitter>(MCE), STI, Options.MCOptions.MCRelaxAll, - Options.MCOptions.MCIncrementalLinkerCompatible, - /*DWARFMustBeAtTheEnd*/ true)); - break; - } - case CGFT_Null: - // The Null output is intended for use for performance analysis and testing, - // not real users. - AsmStreamer.reset(getTarget().createNullStreamer(Context)); - break; - } - - // Create the AsmPrinter, which takes ownership of AsmStreamer if successful. - FunctionPass *Printer = - getTarget().createAsmPrinter(*this, std::move(AsmStreamer)); - if (!Printer) - return true; - - PM.add(Printer); - return false; -} - -bool TargetMachine::addPassesToEmitFile(PassManagerBase &PM, - raw_pwrite_stream &Out, - CodeGenFileType FileType, - bool DisableVerify, - MachineModuleInfo *MMI) { - // Add common CodeGen passes. - bool WillCompleteCodeGenPipeline = true; - MCContext *Context = addPassesToGenerateCode( - this, PM, DisableVerify, WillCompleteCodeGenPipeline, Out, MMI); - if (!Context) - return true; - - if (WillCompleteCodeGenPipeline && addAsmPrinter(PM, Out, FileType, *Context)) - return true; - - PM.add(createFreeMachineFunctionPass()); - return false; -} - -bool TargetMachine::addPassesToEmitMC(PassManagerBase &PM, MCContext *&Ctx, - raw_pwrite_stream &Out, - bool DisableVerify) { - // Add common CodeGen passes. - bool WillCompleteCodeGenPipeline = true; - Ctx = addPassesToGenerateCode(this, PM, DisableVerify, - WillCompleteCodeGenPipeline, Out, - /*MachineModuleInfo*/ nullptr); - if (!Ctx) - return true; - assert(WillCompleteCodeGenPipeline && "CodeGen pipeline has been altered"); - - if (Options.MCOptions.MCSaveTempLabels) - Ctx->setAllowTemporaryLabels(false); - - // Create the code emitter for the target if it exists. If not, .o file - // emission fails. - const MCRegisterInfo &MRI = *getMCRegisterInfo(); - MCCodeEmitter *MCE = - getTarget().createMCCodeEmitter(*getMCInstrInfo(), MRI, *Ctx); - MCAsmBackend *MAB = - getTarget().createMCAsmBackend(MRI, getTargetTriple().str(), TargetCPU, - Options.MCOptions); - if (!MCE || !MAB) - return true; - - const Triple &T = getTargetTriple(); - const MCSubtargetInfo &STI = *getMCSubtargetInfo(); - std::unique_ptr<MCStreamer> AsmStreamer(getTarget().createMCObjectStreamer( - T, *Ctx, std::unique_ptr<MCAsmBackend>(MAB), Out, - std::unique_ptr<MCCodeEmitter>(MCE), STI, Options.MCOptions.MCRelaxAll, - Options.MCOptions.MCIncrementalLinkerCompatible, - /*DWARFMustBeAtTheEnd*/ true)); - - // Create the AsmPrinter, which takes ownership of AsmStreamer if successful. - FunctionPass *Printer = - getTarget().createAsmPrinter(*this, std::move(AsmStreamer)); - if (!Printer) - return true; - - PM.add(Printer); - PM.add(createFreeMachineFunctionPass()); - - return false; // success! -} |
