X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetMachine.cpp;h=dcb833846939f6e1db79aaa26eacf5fb69dea9c8;hb=12af22e8cc217827cf4f118b0f5e4ebbda9925ae;hp=90042dc1d5282aed18de1f591041410cde73b992;hpb=96f678f2d78ae9a2a8c99ca612bf59c056b36797;p=oota-llvm.git diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp index 90042dc1d52..dcb83384693 100644 --- a/lib/Target/TargetMachine.cpp +++ b/lib/Target/TargetMachine.cpp @@ -11,40 +11,24 @@ // //===----------------------------------------------------------------------===// -#include "llvm/MC/MCAsmInfo.h" #include "llvm/Target/TargetMachine.h" -#include "llvm/Target/TargetOptions.h" +#include "llvm/CodeGen/MachineFunction.h" +#include "llvm/IR/Function.h" +#include "llvm/IR/GlobalAlias.h" +#include "llvm/IR/GlobalValue.h" +#include "llvm/IR/GlobalVariable.h" +#include "llvm/IR/Mangler.h" +#include "llvm/MC/MCAsmInfo.h" +#include "llvm/MC/MCCodeGenInfo.h" +#include "llvm/MC/MCContext.h" +#include "llvm/MC/MCTargetOptions.h" +#include "llvm/MC/SectionKind.h" #include "llvm/Support/CommandLine.h" +#include "llvm/Target/TargetLowering.h" +#include "llvm/Target/TargetLoweringObjectFile.h" +#include "llvm/Target/TargetSubtargetInfo.h" using namespace llvm; -//--------------------------------------------------------------------------- -// Command-line options that tend to be useful on more than one back-end. -// - -namespace llvm { - bool StrongPHIElim; - bool EnableMachineSched; - bool HasDivModLibcall; - bool AsmVerbosityDefault(false); -} - -static cl::opt -DataSections("fdata-sections", - cl::desc("Emit data into separate sections"), - cl::init(false)); -static cl::opt -FunctionSections("ffunction-sections", - cl::desc("Emit functions into separate sections"), - cl::init(false)); - -/// EnableMachineSched - temporary flag to enable the machine scheduling pass -/// until we complete the register allocation pass configuration cleanup. -static cl::opt -MachineSchedOpt("enable-misched", - cl::desc("Enable the machine instruction scheduling pass."), - cl::location(EnableMachineSched), - cl::init(false), cl::Hidden); - //--------------------------------------------------------------------------- // TargetMachine Class // @@ -53,13 +37,8 @@ TargetMachine::TargetMachine(const Target &T, StringRef TT, StringRef CPU, StringRef FS, const TargetOptions &Options) : TheTarget(T), TargetTriple(TT), TargetCPU(CPU), TargetFS(FS), - CodeGenInfo(0), AsmInfo(0), - MCRelaxAll(false), - MCNoExecStack(false), - MCSaveTempLabels(false), - MCUseLoc(true), - MCUseCFI(true), - MCUseDwarfDirectory(false), + CodeGenInfo(nullptr), AsmInfo(nullptr), + RequireStructuredCFG(false), Options(Options) { } @@ -68,6 +47,31 @@ TargetMachine::~TargetMachine() { delete AsmInfo; } +/// \brief Reset the target options based on the function's attributes. +void TargetMachine::resetTargetOptions(const MachineFunction *MF) const { + const Function *F = MF->getFunction(); + TargetOptions &TO = MF->getTarget().Options; + +#define RESET_OPTION(X, Y) \ + do { \ + if (F->hasFnAttribute(Y)) \ + TO.X = \ + (F->getAttributes(). \ + getAttribute(AttributeSet::FunctionIndex, \ + Y).getValueAsString() == "true"); \ + } while (0) + + RESET_OPTION(NoFramePointerElim, "no-frame-pointer-elim"); + RESET_OPTION(LessPreciseFPMADOption, "less-precise-fpmad"); + RESET_OPTION(UnsafeFPMath, "unsafe-fp-math"); + RESET_OPTION(NoInfsFPMath, "no-infs-fp-math"); + RESET_OPTION(NoNaNsFPMath, "no-nans-fp-math"); + RESET_OPTION(UseSoftFloat, "use-soft-float"); + RESET_OPTION(DisableTailCalls, "disable-tail-calls"); + + TO.MCOptions.SanitizeAddress = F->hasFnAttribute(Attribute::SanitizeAddress); +} + /// getRelocationModel - Returns the code generation relocation model. The /// choices are static, PIC, and dynamic-no-pic, and target default. Reloc::Model TargetMachine::getRelocationModel() const { @@ -84,6 +88,54 @@ CodeModel::Model TargetMachine::getCodeModel() const { return CodeGenInfo->getCodeModel(); } +/// 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"); +} + +TLSModel::Model TargetMachine::getTLSModel(const GlobalValue *GV) const { + bool isLocal = GV->hasLocalLinkage(); + bool isDeclaration = GV->isDeclaration(); + bool isPIC = getRelocationModel() == Reloc::PIC_; + bool isPIE = Options.PositionIndependentExecutable; + // FIXME: what should we do for protected and internal visibility? + // For variables, is internal different from hidden? + bool isHidden = GV->hasHiddenVisibility(); + + TLSModel::Model Model; + if (isPIC && !isPIE) { + if (isLocal || isHidden) + Model = TLSModel::LocalDynamic; + else + Model = TLSModel::GeneralDynamic; + } else { + if (!isDeclaration || isHidden) + 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; +} + /// getOptLevel - Returns the optimization level: None, Less, /// Default, or Aggressive. CodeGenOpt::Level TargetMachine::getOptLevel() const { @@ -92,27 +144,56 @@ CodeGenOpt::Level TargetMachine::getOptLevel() const { return CodeGenInfo->getOptLevel(); } -bool TargetMachine::getAsmVerbosityDefault() { - return AsmVerbosityDefault; +void TargetMachine::setOptLevel(CodeGenOpt::Level Level) const { + if (CodeGenInfo) + CodeGenInfo->setOptLevel(Level); +} + +bool TargetMachine::getAsmVerbosityDefault() const { + return Options.MCOptions.AsmVerbose; } void TargetMachine::setAsmVerbosityDefault(bool V) { - AsmVerbosityDefault = V; + Options.MCOptions.AsmVerbose = V; } -bool TargetMachine::getFunctionSections() { - return FunctionSections; +bool TargetMachine::getFunctionSections() const { + return Options.FunctionSections; } -bool TargetMachine::getDataSections() { - return DataSections; +bool TargetMachine::getDataSections() const { + return Options.DataSections; } void TargetMachine::setFunctionSections(bool V) { - FunctionSections = V; + Options.FunctionSections = V; } void TargetMachine::setDataSections(bool V) { - DataSections = V; + Options.DataSections = V; +} + +void TargetMachine::getNameWithPrefix(SmallVectorImpl &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; + } + SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, *this); + const TargetLoweringObjectFile &TLOF = + getSubtargetImpl()->getTargetLowering()->getObjFileLowering(); + const MCSection *TheSection = TLOF.SectionForGlobal(GV, GVKind, Mang, *this); + bool CannotUsePrivateLabel = TLOF.isSectionAtomizableBySymbols(*TheSection); + Mang.getNameWithPrefix(Name, GV, CannotUsePrivateLabel); } +MCSymbol *TargetMachine::getSymbol(const GlobalValue *GV, Mangler &Mang) const { + SmallString<60> NameStr; + getNameWithPrefix(NameStr, GV, Mang); + const TargetLoweringObjectFile &TLOF = + getSubtargetImpl()->getTargetLowering()->getObjFileLowering(); + return TLOF.getContext().GetOrCreateSymbol(NameStr.str()); +}