X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetMachine.cpp;h=4a1ac94826f3d496ef7a592e81ee57c527ecbec2;hb=c8578948c9b35080dedd6527abf4f48fc4de43d3;hp=90efb74bc91a02d378ccd7e79e5bc32c39ee3234;hpb=4ae641f4d12c60ee1aaca5e42b6de231c6a02c40;p=oota-llvm.git diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp index 90efb74bc91..4a1ac94826f 100644 --- a/lib/Target/TargetMachine.cpp +++ b/lib/Target/TargetMachine.cpp @@ -11,7 +11,9 @@ // //===----------------------------------------------------------------------===// -#include "llvm/Target/TargetAsmInfo.h" +#include "llvm/CodeGen/MachineFunction.h" +#include "llvm/CodeGen/MachineFrameInfo.h" +#include "llvm/MC/MCAsmInfo.h" #include "llvm/Target/TargetMachine.h" #include "llvm/Target/TargetOptions.h" #include "llvm/Support/CommandLine.h" @@ -22,145 +24,216 @@ using namespace llvm; // namespace llvm { + bool LessPreciseFPMADOption; bool PrintMachineCode; bool NoFramePointerElim; + bool NoFramePointerElimNonLeaf; bool NoExcessFPPrecision; bool UnsafeFPMath; - bool FiniteOnlyFPMathOption; + bool NoInfsFPMath; + bool NoNaNsFPMath; bool HonorSignDependentRoundingFPMathOption; bool UseSoftFloat; + FloatABI::ABIType FloatABIType; + bool NoImplicitFloat; bool NoZerosInBSS; - bool ExceptionHandling; + bool JITExceptionHandling; + bool JITEmitDebugInfo; + bool JITEmitDebugInfoToDisk; bool UnwindTablesMandatory; Reloc::Model RelocationModel; CodeModel::Model CMModel; - bool PerformTailCallOpt; + bool GuaranteedTailCallOpt; unsigned StackAlignment; bool RealignStack; - bool VerboseAsm; bool DisableJumpTables; + bool StrongPHIElim; + bool HasDivModLibcall; + bool AsmVerbosityDefault(false); } -static cl::opt PrintCode("print-machineinstrs", +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)); + 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)); + 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)); + cl::desc("Enable optimizations that may decrease FP precision"), + cl::location(UnsafeFPMath), + cl::init(false)); static cl::opt -EnableFiniteOnlyFPMath("enable-finite-only-fp-math", - cl::desc("Enable optimizations that assumes non- NaNs / +-Infs"), - cl::location(FiniteOnlyFPMathOption), - cl::init(false)); +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 -EnableHonorSignDependentRoundingFPMath(cl::Hidden, - "enable-sign-dependent-rounding-fp-math", - cl::desc("Force codegen to assume rounding mode can change dynamically"), - cl::location(HonorSignDependentRoundingFPMathOption), - cl::init(false)); - +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)); + 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)); + 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 -EnableExceptionHandling("enable-eh", - cl::desc("Emit DWARF exception handling (default if target supports)"), - cl::location(ExceptionHandling), - cl::init(false)); +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 EnableUnwindTables("unwind-tables", - cl::desc("Generate unwinding tables for all functions"), - cl::location(UnwindTablesMandatory), - cl::init(false)); + cl::desc("Generate unwinding tables for all functions"), + cl::location(UnwindTablesMandatory), + cl::init(false)); static cl::opt -DefRelocationModel( - "relocation-model", +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"), + "Target default relocation model"), clEnumValN(Reloc::Static, "static", - " Non-relocatable code"), + "Non-relocatable code"), clEnumValN(Reloc::PIC_, "pic", - " Fully relocatable, position independent code"), + "Fully relocatable, position independent code"), clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic", - " Relocatable external references, non-relocatable code"), + "Relocatable external references, non-relocatable code"), clEnumValEnd)); static cl::opt -DefCodeModel( - "code-model", +DefCodeModel("code-model", cl::desc("Choose code model"), cl::location(CMModel), cl::init(CodeModel::Default), cl::values( clEnumValN(CodeModel::Default, "default", - " Target default code model"), + "Target default code model"), clEnumValN(CodeModel::Small, "small", - " Small code model"), + "Small code model"), clEnumValN(CodeModel::Kernel, "kernel", - " Kernel code model"), + "Kernel code model"), clEnumValN(CodeModel::Medium, "medium", - " Medium code model"), + "Medium code model"), clEnumValN(CodeModel::Large, "large", - " Large code model"), + "Large code model"), clEnumValEnd)); - static cl::opt -EnablePerformTailCallOpt("tailcallopt", - cl::desc("Turn on tail call optimization."), - cl::location(PerformTailCallOpt), - cl::init(false)); - +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(StackAlignment), - cl::init(0)); - + cl::desc("Override default stack alignment"), + cl::location(StackAlignment), + cl::init(0)); static cl::opt EnableRealignStack("realign-stack", - cl::desc("Realign stack if needed"), - cl::location(RealignStack), - cl::init(true)); - -static cl::opt -AsmVerbose("asm-verbose", cl::desc("Add comments to directives."), - cl::location(VerboseAsm), - cl::init(false)); - + 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)); - + 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"), + cl::init(false)); +static cl::opt +FunctionSections("ffunction-sections", + cl::desc("Emit functions into separate sections"), + cl::init(false)); //--------------------------------------------------------------------------- // TargetMachine Class // +TargetMachine::TargetMachine(const Target &T) + : TheTarget(T), AsmInfo(0), + MCRelaxAll(false), + MCNoExecStack(false), + MCSaveTempLabels(false), + MCUseLoc(true) { + // Typically it will be subtargets that will adjust FloatABIType from Default + // to Soft or Hard. + if (UseSoftFloat) + FloatABIType = FloatABI::Soft; +} + TargetMachine::~TargetMachine() { delete AsmInfo; } @@ -187,17 +260,60 @@ void TargetMachine::setCodeModel(CodeModel::Model Model) { CMModel = Model; } +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; +} + 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; } - + /// 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; + } +}