X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetMachine.cpp;h=70088b1a4976b88482d145d3975986c0f4fecd7f;hb=27107f6ab4627fa38bcacad6757ed6d52910f880;hp=bf70d12a6b803be8075422f1920f666cf3f72dcc;hpb=80235d508e5f7a9603ef43ba6625984173ff0323;p=oota-llvm.git diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp index bf70d12a6b8..70088b1a497 100644 --- a/lib/Target/TargetMachine.cpp +++ b/lib/Target/TargetMachine.cpp @@ -2,8 +2,8 @@ // // The LLVM Compiler Infrastructure // -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // @@ -12,8 +12,11 @@ //===----------------------------------------------------------------------===// #include "llvm/Target/TargetMachine.h" -#include "llvm/Target/TargetOptions.h" -#include "llvm/Type.h" +#include "llvm/GlobalAlias.h" +#include "llvm/GlobalValue.h" +#include "llvm/GlobalVariable.h" +#include "llvm/MC/MCAsmInfo.h" +#include "llvm/MC/MCCodeGenInfo.h" #include "llvm/Support/CommandLine.h" using namespace llvm; @@ -22,82 +25,140 @@ using namespace llvm; // namespace llvm { - bool PrintMachineCode; - bool NoFramePointerElim; - bool NoExcessFPPrecision; - bool UnsafeFPMath; - bool FiniteOnlyFPMathOption; - Reloc::Model RelocationModel; -}; -namespace { - cl::opt PrintCode("print-machineinstrs", - cl::desc("Print generated machine code"), - cl::location(PrintMachineCode), cl::init(false)); - - cl::opt - DisableFPElim("disable-fp-elim", - cl::desc("Disable frame pointer elimination optimization"), - cl::location(NoFramePointerElim), - cl::init(false)); - cl::opt - DisableExcessPrecision("disable-excess-fp-precision", - cl::desc("Disable optimizations that may increase FP precision"), - cl::location(NoExcessFPPrecision), - cl::init(false)); - cl::opt - EnableUnsafeFPMath("enable-unsafe-fp-math", - cl::desc("Enable optimizations that may decrease FP precision"), - cl::location(UnsafeFPMath), - cl::init(false)); - cl::opt - EnableFiniteOnltFPMath("enable-finite-only-fp-math", - cl::desc("Enable optimizations that assumes non- NaNs / +-Infs"), - cl::location(FiniteOnlyFPMathOption), - cl::init(false)); - cl::opt - DefRelocationModel( - "relocation-model", - cl::desc("Choose relocation model"), - cl::location(RelocationModel), - cl::init(Reloc::Default), - cl::values( - clEnumValN(Reloc::Default, "default", - "Target default relocation model"), - clEnumValN(Reloc::Static, "static", - "Non-relocatable code"), - clEnumValN(Reloc::PIC, "pic", - "Fully relocatable, position independent code"), - clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic", - "Relocatable external references, non-relocatable code"), - clEnumValEnd)); -}; + 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)); //--------------------------------------------------------------------------- // TargetMachine Class // -TargetMachine::TargetMachine(const std::string &name, const Module &M) - : Name(name) { +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), + Options(Options) { } TargetMachine::~TargetMachine() { + delete CodeGenInfo; + delete AsmInfo; } /// getRelocationModel - Returns the code generation relocation model. The /// choices are static, PIC, and dynamic-no-pic, and target default. -Reloc::Model TargetMachine::getRelocationModel() { - return RelocationModel; +Reloc::Model TargetMachine::getRelocationModel() const { + if (!CodeGenInfo) + return Reloc::Default; + return CodeGenInfo->getRelocationModel(); } -/// setRelocationModel - Sets the code generation relocation model. -void TargetMachine::setRelocationModel(Reloc::Model Model) { - RelocationModel = Model; +/// getCodeModel - Returns the code model. The choices are small, kernel, +/// medium, large, and target default. +CodeModel::Model TargetMachine::getCodeModel() const { + if (!CodeGenInfo) + return CodeModel::Default; + return CodeGenInfo->getCodeModel(); } -namespace llvm { - /// FiniteOnlyFPMath - This returns true when the -enable-finite-only-fp-math - /// option is specified on the command line. If this returns false (default), - /// the code generator is not allowed to assume that FP arithmetic arguments - /// and results are never NaNs or +-Infs. - bool FiniteOnlyFPMath() { return UnsafeFPMath || FiniteOnlyFPMathOption; } -}; +/// Get the IR-specified TLS model for Var. +static TLSModel::Model getSelectedTLSModel(const GlobalVariable *Var) { + switch (Var->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 { + // If GV is an alias then use the aliasee for determining + // thread-localness. + if (const GlobalAlias *GA = dyn_cast(GV)) + GV = GA->resolveAliasedGlobal(false); + const GlobalVariable *Var = cast(GV); + + bool isLocal = Var->hasLocalLinkage(); + bool isDeclaration = Var->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 = Var->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(Var); + if (SelectedModel > Model) + return SelectedModel; + + return Model; +} + +/// getOptLevel - Returns the optimization level: None, Less, +/// Default, or Aggressive. +CodeGenOpt::Level TargetMachine::getOptLevel() const { + if (!CodeGenInfo) + return CodeGenOpt::Default; + return CodeGenInfo->getOptLevel(); +} + +bool TargetMachine::getAsmVerbosityDefault() { + return AsmVerbosityDefault; +} + +void TargetMachine::setAsmVerbosityDefault(bool V) { + AsmVerbosityDefault = V; +} + +bool TargetMachine::getFunctionSections() { + return FunctionSections; +} + +bool TargetMachine::getDataSections() { + return DataSections; +} + +void TargetMachine::setFunctionSections(bool V) { + FunctionSections = V; +} + +void TargetMachine::setDataSections(bool V) { + DataSections = V; +}