X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetMachine.cpp;h=49f1e4dfaae6c29e61d2a7de94e2d0b152b0d3b4;hb=d8e880c670699bd56dc3968647a4b963793d201d;hp=51c1222ab68e69eb6a60af1339f6d130e088f190;hpb=f70e0c216c074bd2ae2b08178f5512849545db4e;p=oota-llvm.git diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp index 51c1222ab68..49f1e4dfaae 100644 --- a/lib/Target/TargetMachine.cpp +++ b/lib/Target/TargetMachine.cpp @@ -1,63 +1,217 @@ //===-- 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 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/IntrinsicLowering.h" +#include "llvm/Target/TargetOptions.h" +#include "llvm/Support/CommandLine.h" using namespace llvm; //--------------------------------------------------------------------------- -// TargetMachine Class +// Command-line options that tend to be useful on more than one back-end. // -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(); + +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; + unsigned StackAlignment; + bool RealignStack; + bool VerboseAsm; + bool DisableJumpTables; + bool StrongPHIElim; + bool DisableRedZone; } +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)); -TargetMachine::~TargetMachine() { - delete IL; -} +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 +OverrideStackAlignment("stack-alignment", + cl::desc("Override default stack alignment"), + cl::location(StackAlignment), + cl::init(0)); -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; +static cl::opt +EnableRealignStack("realign-stack", + cl::desc("Realign stack if needed"), + cl::location(RealignStack), + cl::init(true)); - return DataLayout.getTypeSize(Ty); -} +static cl::opt +AsmVerbose("asm-verbose", cl::desc("Add comments to directives."), + cl::location(VerboseAsm), + cl::init(false)); + +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 +DisableRedZoneOption("disable-red-zone", + cl::desc("Do not emit code that uses the red zone."), + cl::location(DisableRedZone), + cl::init(false)); //--------------------------------------------------------------------------- -// TargetCacheInfo Class +// TargetMachine Class // -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); +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; +} + +/// 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; +} + +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; + } +} +