X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetMachine.cpp;h=342aa0175dfea4dedda0362a702cd99ce4a6463e;hb=ebcba612b537f45a033ccd9a60bee0c45e2e2ded;hp=dc722fc7e5c72eeade9a21c46985708372ee23a8;hpb=f27eeea54fb0176986f76731c499176345047dff;p=oota-llvm.git diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp index dc722fc7e5c..342aa0175df 100644 --- a/lib/Target/TargetMachine.cpp +++ b/lib/Target/TargetMachine.cpp @@ -1,50 +1,196 @@ //===-- TargetMachine.cpp - General Target Information ---------------------==// // +// The LLVM Compiler Infrastructure +// +// This file 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. -// This file also implements TargetCacheInfo. // //===----------------------------------------------------------------------===// +#include "llvm/Target/TargetAsmInfo.h" #include "llvm/Target/TargetMachine.h" -#include "llvm/Target/TargetCacheInfo.h" -#include "llvm/Type.h" +#include "llvm/Target/TargetOptions.h" +#include "llvm/Support/CommandLine.h" +using namespace llvm; //--------------------------------------------------------------------------- -// class TargetMachine -// -// Purpose: -// Machine description. -// +// Command-line options that tend to be useful on more than one back-end. +// + +namespace llvm { + bool PrintMachineCode; + bool NoFramePointerElim; + bool NoExcessFPPrecision; + bool UnsafeFPMath; + bool FiniteOnlyFPMathOption; + bool HonorSignDependentRoundingFPMathOption; + bool UseSoftFloat; + bool NoZerosInBSS; + bool ExceptionHandling; + bool UnwindTablesMandatory; + Reloc::Model RelocationModel; + CodeModel::Model CMModel; + bool PerformTailCallOpt; + bool OptimizeForSize; + bool RealignStack; + unsigned StackAlignment; +} + +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 +DisableExcessPrecision("disable-excess-fp-precision", + cl::desc("Disable optimizations that may increase FP precision"), + cl::location(NoExcessFPPrecision), + 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 +EnableFiniteOnlyFPMath("enable-finite-only-fp-math", + cl::desc("Enable optimizations that assumes non- NaNs / +-Infs"), + cl::location(FiniteOnlyFPMathOption), + 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)); + +static cl::opt +GenerateSoftFloatCalls("soft-float", + cl::desc("Generate software floating point library calls"), + cl::location(UseSoftFloat), + cl::init(false)); +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 +EnableExceptionHandling("enable-eh", + cl::desc("Emit DWARF exception handling (default if target supports)"), + cl::location(ExceptionHandling), + cl::init(false)); +static cl::opt +EnableUnwindTables("unwind-tables", + cl::desc("Generate unwinding tables for all functions"), + cl::location(UnwindTablesMandatory), + cl::init(false)); + +static 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)); +static 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)); + +static cl::opt +EnablePerformTailCallOpt("tailcallopt", + cl::desc("Turn on tail call optimization."), + cl::location(PerformTailCallOpt), + cl::init(false)); +static cl::opt +EnableOptimizeForSize("optimize-size", + cl::desc("Optimize for size."), + cl::location(OptimizeForSize), + cl::init(false)); + +static cl::opt +EnableRealignStack("realign-stack", + cl::desc("Realign stack if needed"), + cl::location(RealignStack), + cl::init(true)); + +static cl::opt +OverrideStackAlignment("stack-alignment", + cl::desc("Override default stack alignment"), + cl::location(StackAlignment), + cl::init(0)); + //--------------------------------------------------------------------------- +// TargetMachine Class +// + +TargetMachine::~TargetMachine() { + 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; +} -// function TargetMachine::findOptimalStorageSize -// -// Purpose: -// This default implementation assumes that all sub-word data items use -// space equal to optSizeForSubWordData, and all other primitive data -// items use space according to the type. -// -unsigned TargetMachine::findOptimalStorageSize(const Type *Ty) const { - // Round integral values smaller than SubWordDataSize up to SubWordDataSize - if (Ty->isIntegral() && - Ty->getPrimitiveSize() < DataLayout.getSubWordDataSize()) - return DataLayout.getSubWordDataSize(); - - return DataLayout.getTypeSize(Ty); +/// 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; +} -//--------------------------------------------------------------------------- -// class TargetCacheInfo -// -// Purpose: -// Describes properties of the target cache architecture. -//--------------------------------------------------------------------------- +/// setCodeModel - Sets the code model. +void TargetMachine::setCodeModel(CodeModel::Model Model) { + CMModel = Model; +} -void TargetCacheInfo::Initialize() { - numLevels = 2; - cacheLineSizes.push_back(16); cacheLineSizes.push_back(32); - cacheSizes.push_back(1 << 15); cacheSizes.push_back(1 << 20); - cacheAssoc.push_back(1); cacheAssoc.push_back(4); +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; + } } +