X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetMachine.cpp;h=3c00428a460d2105b66d6ea547f668d747a865a2;hb=a3602685b34f4c9a1602fdc7fb120a7f51228736;hp=82778d9b8ae105a2ae7c56a758e267f731112459;hpb=323819e4e1e3573072e7dbd82b0ebd75b5df0648;p=oota-llvm.git diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp index 82778d9b8ae..3c00428a460 100644 --- a/lib/Target/TargetMachine.cpp +++ b/lib/Target/TargetMachine.cpp @@ -1,63 +1,170 @@ //===-- TargetMachine.cpp - General Target Information ---------------------==// -// +// // 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 describes the general parts of a Target machine. // //===----------------------------------------------------------------------===// +#include "llvm/Target/TargetAsmInfo.h" #include "llvm/Target/TargetMachine.h" -#include "llvm/Type.h" -#include "llvm/IntrinsicLowering.h" -#include "Support/CommandLine.h" +#include "llvm/Target/TargetOptions.h" +#include "llvm/Support/CommandLine.h" using namespace llvm; //--------------------------------------------------------------------------- // Command-line options that tend to be useful on more than one back-end. // -namespace llvm { +namespace llvm { bool PrintMachineCode; -}; + bool NoFramePointerElim; + bool NoExcessFPPrecision; + bool UnsafeFPMath; + bool FiniteOnlyFPMathOption; + bool HonorSignDependentRoundingFPMathOption; + bool UseSoftFloat; + bool NoZerosInBSS; + bool ExceptionHandling; + bool NewCCModeling; + 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 + EnableFiniteOnlyFPMath("enable-finite-only-fp-math", + cl::desc("Enable optimizations that assumes non- NaNs / +-Infs"), + cl::location(FiniteOnlyFPMathOption), + cl::init(false)); + 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)); + + 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("enable-eh", + 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 code 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)); + cl::opt + EnableNewCCModeling("new-cc-modeling-scheme", + cl::desc("New CC modeling scheme."), + cl::location(NewCCModeling), + cl::init(false)); +} //--------------------------------------------------------------------------- // TargetMachine Class // -TargetMachine::TargetMachine(const std::string &name, IntrinsicLowering *il, - bool LittleEndian, - unsigned char PtrSize, unsigned char PtrAl, - unsigned char DoubleAl, unsigned char FloatAl, - unsigned char LongAl, unsigned char IntAl, - unsigned char ShortAl, unsigned char ByteAl) - : Name(name), DataLayout(name, LittleEndian, - PtrSize, PtrAl, DoubleAl, FloatAl, LongAl, - IntAl, ShortAl, ByteAl) { - IL = il ? il : new DefaultIntrinsicLowering(); -} -TargetMachine::TargetMachine(const std::string &name, IntrinsicLowering *il, - const Module &M) - : Name(name), DataLayout(name, &M) { - IL = il ? il : new DefaultIntrinsicLowering(); -} TargetMachine::~TargetMachine() { - delete IL; + delete AsmInfo; } -unsigned TargetMachine::findOptimalStorageSize(const Type *Ty) const { - // All integer types smaller than ints promote to 4 byte integers. - if (Ty->isIntegral() && Ty->getPrimitiveSize() < 4) - return 4; +/// 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; +} + +/// getCodeModel - Returns the code model. The choices are small, kernel, +/// medium, large, and target default. +CodeModel::Model TargetMachine::getCodeModel() { + return CMModel; +} + +/// setCodeModel - Sets the code model. +void TargetMachine::setCodeModel(CodeModel::Model Model) { + CMModel = Model; +} - return DataLayout.getTypeSize(Ty); +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; } + + /// 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; + } } +