X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetMachine.cpp;h=fe8a7cebd0a0113e3f9b8a05b1a3be9fa256d876;hb=326efe58918d3f0a431d07938054870fcd0e240f;hp=842865391dd4627437b2dc1b9e089ae08ff66744;hpb=1b340dc8e20dc1ce204ebdcc2ff11c3dd36888f1;p=oota-llvm.git diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp index 842865391dd..fe8a7cebd0a 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. // //===----------------------------------------------------------------------===// // @@ -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" @@ -22,129 +24,261 @@ 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; - Reloc::Model RelocationModel; - CodeModel::Model CMModel; -} -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 - GenerateSoftFloatCalls("soft-float", - cl::desc("Generate software floating point library calls"), - cl::location(UseSoftFloat), - cl::init(false)); - 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::opt - EnableExceptionHandling("exception-handling", - cl::desc("Exception handling should be emitted."), - cl::location(ExceptionHandling), - 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)); - cl::opt - DefCodeModel( - "code-model", - cl::desc("Choose relocation model"), - cl::location(CMModel), - cl::init(CodeModel::Default), - cl::values( - clEnumValN(CodeModel::Default, "default", - " Target default code model"), - clEnumValN(CodeModel::Small, "small", - " Small code model"), - clEnumValN(CodeModel::Kernel, "kernel", - " Kernel code model"), - clEnumValN(CodeModel::Medium, "medium", - " Medium code model"), - clEnumValN(CodeModel::Large, "large", - " Large code model"), - clEnumValEnd)); + 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"), + cl::init(false)); +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) + : TheTarget(T), TargetTriple(TT), TargetCPU(CPU), TargetFS(FS), + CodeGenInfo(0), AsmInfo(0), + MCRelaxAll(false), + MCNoExecStack(false), + MCSaveTempLabels(false), + MCUseLoc(true), + MCUseCFI(true) { + // Typically it will be subtargets that will adjust FloatABIType from Default + // to Soft or Hard. + if (UseSoftFloat) + FloatABIType = FloatABI::Soft; +} + 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; -} - -/// setRelocationModel - Sets the code generation relocation model. -void TargetMachine::setRelocationModel(Reloc::Model Model) { - RelocationModel = Model; +Reloc::Model TargetMachine::getRelocationModel() const { + if (!CodeGenInfo) + return Reloc::Default; + return CodeGenInfo->getRelocationModel(); } /// getCodeModel - Returns the code model. The choices are small, kernel, /// medium, large, and target default. -CodeModel::Model TargetMachine::getCodeModel() { - return CMModel; +CodeModel::Model TargetMachine::getCodeModel() const { + if (!CodeGenInfo) + return CodeModel::Default; + return CodeGenInfo->getCodeModel(); } -/// setCodeModel - Sets the code model. -void TargetMachine::setCodeModel(CodeModel::Model Model) { - CMModel = Model; +bool TargetMachine::getAsmVerbosityDefault() { + return AsmVerbosityDefault; } -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; } +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 { + /// 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; + } +}