diff options
Diffstat (limited to 'lib/Target/TargetMachine.cpp')
| -rw-r--r-- | lib/Target/TargetMachine.cpp | 213 |
1 files changed, 32 insertions, 181 deletions
diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp index 805e16e..80cc5fa 100644 --- a/lib/Target/TargetMachine.cpp +++ b/lib/Target/TargetMachine.cpp @@ -24,153 +24,11 @@ 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<bool, true> -PrintCode("print-machineinstrs", - cl::desc("Print generated machine code"), - cl::location(PrintMachineCode), cl::init(false)); -static cl::opt<bool, true> -DisableFPElim("disable-fp-elim", - cl::desc("Disable frame pointer elimination optimization"), - cl::location(NoFramePointerElim), - cl::init(false)); -static cl::opt<bool, true> -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<bool, true> -DisableExcessPrecision("disable-excess-fp-precision", - cl::desc("Disable optimizations that may increase FP precision"), - cl::location(NoExcessFPPrecision), - cl::init(false)); -static cl::opt<bool, true> -EnableFPMAD("enable-fp-mad", - cl::desc("Enable less precise MAD instructions to be generated"), - cl::location(LessPreciseFPMADOption), - cl::init(false)); -static cl::opt<bool, true> -EnableUnsafeFPMath("enable-unsafe-fp-math", - cl::desc("Enable optimizations that may decrease FP precision"), - cl::location(UnsafeFPMath), - cl::init(false)); -static cl::opt<bool, true> -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<bool, true> -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<bool, true> -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<bool, true> -GenerateSoftFloatCalls("soft-float", - cl::desc("Generate software floating point library calls"), - cl::location(UseSoftFloat), - cl::init(false)); -static cl::opt<llvm::FloatABI::ABIType, true> -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<bool, true> -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<bool, true> -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<bool, true> -EmitJitDebugInfo("jit-emit-debug", - cl::desc("Emit debug information to debugger"), - cl::location(JITEmitDebugInfo), - cl::init(EMIT_DEBUG)); -#undef EMIT_DEBUG -static cl::opt<bool, true> -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<bool, true> -EnableGuaranteedTailCallOpt("tailcallopt", - cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."), - cl::location(GuaranteedTailCallOpt), - cl::init(false)); -static cl::opt<unsigned, true> -OverrideStackAlignment("stack-alignment", - cl::desc("Override default stack alignment"), - cl::location(StackAlignmentOverride), - cl::init(0)); -static cl::opt<bool, true> -EnableRealignStack("realign-stack", - cl::desc("Realign stack if needed"), - cl::location(RealignStack), - cl::init(true)); -static cl::opt<bool, true> -DisableSwitchTables(cl::Hidden, "disable-jump-tables", - cl::desc("Do not generate jump tables."), - cl::location(DisableJumpTables), - cl::init(false)); -static cl::opt<bool, true> -EnableStrongPHIElim(cl::Hidden, "strong-phi-elim", - cl::desc("Use strong PHI elimination."), - cl::location(StrongPHIElim), - cl::init(false)); -static cl::opt<std::string> -TrapFuncName("trap-func", cl::Hidden, - cl::desc("Emit a call to trap function rather than a trap instruction"), - cl::init("")); static cl::opt<bool> DataSections("fdata-sections", cl::desc("Emit data into separate sections"), @@ -179,18 +37,14 @@ static cl::opt<bool> FunctionSections("ffunction-sections", cl::desc("Emit functions into separate sections"), cl::init(false)); -static cl::opt<bool, true> -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 +52,8 @@ 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() { @@ -258,36 +109,36 @@ 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; +/// DisableFramePointerElim - This returns true if frame pointer elimination +/// optimization should be disabled for the given machine function. +bool TargetOptions::DisableFramePointerElim(const MachineFunction &MF) const { + // 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(); } - /// 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; } + return NoFramePointerElim; +} - /// 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; - } +/// 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 TargetOptions::LessPreciseFPMAD() const { + return UnsafeFPMath || LessPreciseFPMADOption; +} - /// 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; - } +/// HonorSignDependentRoundingFPMath - Return true if the codegen must assume +/// that the rounding mode of the FPU can change from its default. +bool TargetOptions::HonorSignDependentRoundingFPMath() const { + 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 TargetOptions::getTrapFunctionName() const { + return TrapFuncName; } |