X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetMachine.cpp;h=9ba78bce7f9c6eee7d768165f33035c6d941ced3;hb=16c7e0b48cd0a34565aae663caee83e5a641823a;hp=805e16e81797feff035a58f7425d6421331fc7f8;hpb=b95fc31aa2e5a0a0b9ee1909d1cb949577c5aa16;p=oota-llvm.git diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp index 805e16e8179..9ba78bce7f9 100644 --- a/lib/Target/TargetMachine.cpp +++ b/lib/Target/TargetMachine.cpp @@ -11,11 +11,14 @@ // //===----------------------------------------------------------------------===// +#include "llvm/Target/TargetMachine.h" #include "llvm/CodeGen/MachineFunction.h" -#include "llvm/CodeGen/MachineFrameInfo.h" +#include "llvm/IR/Function.h" +#include "llvm/IR/GlobalAlias.h" +#include "llvm/IR/GlobalValue.h" +#include "llvm/IR/GlobalVariable.h" #include "llvm/MC/MCAsmInfo.h" -#include "llvm/Target/TargetMachine.h" -#include "llvm/Target/TargetOptions.h" +#include "llvm/MC/MCCodeGenInfo.h" #include "llvm/Support/CommandLine.h" using namespace llvm; @@ -24,153 +27,10 @@ using namespace llvm; // namespace llvm { - bool LessPreciseFPMADOption; - bool PrintMachineCode; - bool NoFramePointerElim; - bool NoFramePointerElimNonLeaf; - bool NoExcessFPPrecision; - bool UnsafeFPMath; - bool NoInfsFPMath; - bool NoNaNsFPMath; - bool HonorSignDependentRoundingFPMathOption; - bool UseSoftFloat; - FloatABI::ABIType FloatABIType; - bool NoImplicitFloat; - bool NoZerosInBSS; - bool JITExceptionHandling; - bool JITEmitDebugInfo; - bool JITEmitDebugInfoToDisk; - bool GuaranteedTailCallOpt; - unsigned StackAlignmentOverride; - bool RealignStack; - bool DisableJumpTables; - bool StrongPHIElim; bool HasDivModLibcall; bool AsmVerbosityDefault(false); - bool EnableSegmentedStacks; } -static cl::opt -PrintCode("print-machineinstrs", - cl::desc("Print generated machine code"), - cl::location(PrintMachineCode), cl::init(false)); -static cl::opt -DisableFPElim("disable-fp-elim", - cl::desc("Disable frame pointer elimination optimization"), - cl::location(NoFramePointerElim), - cl::init(false)); -static cl::opt -DisableFPElimNonLeaf("disable-non-leaf-fp-elim", - cl::desc("Disable frame pointer elimination optimization for non-leaf funcs"), - cl::location(NoFramePointerElimNonLeaf), - cl::init(false)); -static cl::opt -DisableExcessPrecision("disable-excess-fp-precision", - cl::desc("Disable optimizations that may increase FP precision"), - cl::location(NoExcessFPPrecision), - cl::init(false)); -static cl::opt -EnableFPMAD("enable-fp-mad", - cl::desc("Enable less precise MAD instructions to be generated"), - cl::location(LessPreciseFPMADOption), - cl::init(false)); -static cl::opt -EnableUnsafeFPMath("enable-unsafe-fp-math", - cl::desc("Enable optimizations that may decrease FP precision"), - cl::location(UnsafeFPMath), - cl::init(false)); -static cl::opt -EnableNoInfsFPMath("enable-no-infs-fp-math", - cl::desc("Enable FP math optimizations that assume no +-Infs"), - cl::location(NoInfsFPMath), - cl::init(false)); -static cl::opt -EnableNoNaNsFPMath("enable-no-nans-fp-math", - cl::desc("Enable FP math optimizations that assume no NaNs"), - cl::location(NoNaNsFPMath), - cl::init(false)); -static cl::opt -EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math", - cl::Hidden, - cl::desc("Force codegen to assume rounding mode can change dynamically"), - cl::location(HonorSignDependentRoundingFPMathOption), - cl::init(false)); -static cl::opt -GenerateSoftFloatCalls("soft-float", - cl::desc("Generate software floating point library calls"), - cl::location(UseSoftFloat), - cl::init(false)); -static cl::opt -FloatABIForCalls("float-abi", - cl::desc("Choose float ABI type"), - cl::location(FloatABIType), - cl::init(FloatABI::Default), - cl::values( - clEnumValN(FloatABI::Default, "default", - "Target default float ABI type"), - clEnumValN(FloatABI::Soft, "soft", - "Soft float ABI (implied by -soft-float)"), - clEnumValN(FloatABI::Hard, "hard", - "Hard float ABI (uses FP registers)"), - clEnumValEnd)); -static cl::opt -DontPlaceZerosInBSS("nozero-initialized-in-bss", - cl::desc("Don't place zero-initialized symbols into bss section"), - cl::location(NoZerosInBSS), - cl::init(false)); -static cl::opt -EnableJITExceptionHandling("jit-enable-eh", - cl::desc("Emit exception handling information"), - cl::location(JITExceptionHandling), - cl::init(false)); -// In debug builds, make this default to true. -#ifdef NDEBUG -#define EMIT_DEBUG false -#else -#define EMIT_DEBUG true -#endif -static cl::opt -EmitJitDebugInfo("jit-emit-debug", - cl::desc("Emit debug information to debugger"), - cl::location(JITEmitDebugInfo), - cl::init(EMIT_DEBUG)); -#undef EMIT_DEBUG -static cl::opt -EmitJitDebugInfoToDisk("jit-emit-debug-to-disk", - cl::Hidden, - cl::desc("Emit debug info objfiles to disk"), - cl::location(JITEmitDebugInfoToDisk), - cl::init(false)); - -static cl::opt -EnableGuaranteedTailCallOpt("tailcallopt", - cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."), - cl::location(GuaranteedTailCallOpt), - cl::init(false)); -static cl::opt -OverrideStackAlignment("stack-alignment", - cl::desc("Override default stack alignment"), - cl::location(StackAlignmentOverride), - cl::init(0)); -static cl::opt -EnableRealignStack("realign-stack", - cl::desc("Realign stack if needed"), - cl::location(RealignStack), - cl::init(true)); -static cl::opt -DisableSwitchTables(cl::Hidden, "disable-jump-tables", - cl::desc("Do not generate jump tables."), - cl::location(DisableJumpTables), - cl::init(false)); -static cl::opt -EnableStrongPHIElim(cl::Hidden, "strong-phi-elim", - cl::desc("Use strong PHI elimination."), - cl::location(StrongPHIElim), - cl::init(false)); -static cl::opt -TrapFuncName("trap-func", cl::Hidden, - cl::desc("Emit a call to trap function rather than a trap instruction"), - cl::init("")); static cl::opt DataSections("fdata-sections", cl::desc("Emit data into separate sections"), @@ -179,18 +39,14 @@ static cl::opt FunctionSections("ffunction-sections", cl::desc("Emit functions into separate sections"), cl::init(false)); -static cl::opt -SegmentedStacks("segmented-stacks", - cl::desc("Use segmented stacks if possible."), - cl::location(EnableSegmentedStacks), - cl::init(false)); - + //--------------------------------------------------------------------------- // TargetMachine Class // TargetMachine::TargetMachine(const Target &T, - StringRef TT, StringRef CPU, StringRef FS) + StringRef TT, StringRef CPU, StringRef FS, + const TargetOptions &Options) : TheTarget(T), TargetTriple(TT), TargetCPU(CPU), TargetFS(FS), CodeGenInfo(0), AsmInfo(0), MCRelaxAll(false), @@ -198,11 +54,8 @@ TargetMachine::TargetMachine(const Target &T, MCSaveTempLabels(false), MCUseLoc(true), MCUseCFI(true), - MCUseDwarfDirectory(false) { - // Typically it will be subtargets that will adjust FloatABIType from Default - // to Soft or Hard. - if (UseSoftFloat) - FloatABIType = FloatABI::Soft; + MCUseDwarfDirectory(false), + Options(Options) { } TargetMachine::~TargetMachine() { @@ -210,6 +63,29 @@ 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"); +} + /// getRelocationModel - Returns the code generation relocation model. The /// choices are static, PIC, and dynamic-no-pic, and target default. Reloc::Model TargetMachine::getRelocationModel() const { @@ -226,6 +102,60 @@ CodeModel::Model TargetMachine::getCodeModel() const { return CodeGenInfo->getCodeModel(); } +/// 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 { @@ -234,6 +164,11 @@ CodeGenOpt::Level TargetMachine::getOptLevel() const { return CodeGenInfo->getOptLevel(); } +void TargetMachine::setOptLevel(CodeGenOpt::Level Level) const { + if (CodeGenInfo) + CodeGenInfo->setOptLevel(Level); +} + bool TargetMachine::getAsmVerbosityDefault() { return AsmVerbosityDefault; } @@ -257,37 +192,3 @@ void TargetMachine::setFunctionSections(bool V) { void TargetMachine::setDataSections(bool V) { DataSections = V; } - -namespace llvm { - /// DisableFramePointerElim - This returns true if frame pointer elimination - /// optimization should be disabled for the given machine function. - bool DisableFramePointerElim(const MachineFunction &MF) { - // Check to see if we should eliminate non-leaf frame pointers and then - // check to see if we should eliminate all frame pointers. - if (NoFramePointerElimNonLeaf && !NoFramePointerElim) { - const MachineFrameInfo *MFI = MF.getFrameInfo(); - return MFI->hasCalls(); - } - - return NoFramePointerElim; - } - - /// LessPreciseFPMAD - This flag return true when -enable-fp-mad option - /// is specified on the command line. When this flag is off(default), the - /// code generator is not allowed to generate mad (multiply add) if the - /// result is "less precise" than doing those operations individually. - bool LessPreciseFPMAD() { return UnsafeFPMath || LessPreciseFPMADOption; } - - /// HonorSignDependentRoundingFPMath - Return true if the codegen must assume - /// that the rounding mode of the FPU can change from its default. - bool HonorSignDependentRoundingFPMath() { - return !UnsafeFPMath && HonorSignDependentRoundingFPMathOption; - } - - /// getTrapFunctionName - If this returns a non-empty string, this means isel - /// should lower Intrinsic::trap to a call to the specified function name - /// instead of an ISD::TRAP node. - StringRef getTrapFunctionName() { - return TrapFuncName; - } -}