CommandFlags.h revision 05bc091336fa31dd0fe62058ae273900d9f8c8ec
1//===-- CommandFlags.h - Command Line Flags Interface -----------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file contains codegen-specific flags that are shared between different 11// command line tools. The tools "llc" and "opt" both use this file to prevent 12// flag duplication. 13// 14//===----------------------------------------------------------------------===// 15 16#ifndef LLVM_CODEGEN_COMMAND_LINE_FLAGS_H 17#define LLVM_CODEGEN_COMMAND_LINE_FLAGS_H 18 19#include "llvm/Support/CodeGen.h" 20#include "llvm/Support/CommandLine.h" 21#include "llvm/Target/TargetMachine.h" 22#include <string> 23using namespace llvm; 24 25cl::opt<std::string> 26MArch("march", cl::desc("Architecture to generate code for (see --version)")); 27 28cl::opt<std::string> 29MCPU("mcpu", 30 cl::desc("Target a specific cpu type (-mcpu=help for details)"), 31 cl::value_desc("cpu-name"), 32 cl::init("")); 33 34cl::list<std::string> 35MAttrs("mattr", 36 cl::CommaSeparated, 37 cl::desc("Target specific attributes (-mattr=help for details)"), 38 cl::value_desc("a1,+a2,-a3,...")); 39 40cl::opt<Reloc::Model> 41RelocModel("relocation-model", 42 cl::desc("Choose relocation model"), 43 cl::init(Reloc::Default), 44 cl::values( 45 clEnumValN(Reloc::Default, "default", 46 "Target default relocation model"), 47 clEnumValN(Reloc::Static, "static", 48 "Non-relocatable code"), 49 clEnumValN(Reloc::PIC_, "pic", 50 "Fully relocatable, position independent code"), 51 clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic", 52 "Relocatable external references, non-relocatable code"), 53 clEnumValEnd)); 54 55cl::opt<llvm::CodeModel::Model> 56CMModel("code-model", 57 cl::desc("Choose code model"), 58 cl::init(CodeModel::Default), 59 cl::values(clEnumValN(CodeModel::Default, "default", 60 "Target default code model"), 61 clEnumValN(CodeModel::Small, "small", 62 "Small code model"), 63 clEnumValN(CodeModel::Kernel, "kernel", 64 "Kernel code model"), 65 clEnumValN(CodeModel::Medium, "medium", 66 "Medium code model"), 67 clEnumValN(CodeModel::Large, "large", 68 "Large code model"), 69 clEnumValEnd)); 70 71cl::opt<bool> 72RelaxAll("mc-relax-all", 73 cl::desc("When used with filetype=obj, " 74 "relax all fixups in the emitted object file")); 75 76cl::opt<TargetMachine::CodeGenFileType> 77FileType("filetype", cl::init(TargetMachine::CGFT_AssemblyFile), 78 cl::desc("Choose a file type (not all types are supported by all targets):"), 79 cl::values( 80 clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm", 81 "Emit an assembly ('.s') file"), 82 clEnumValN(TargetMachine::CGFT_ObjectFile, "obj", 83 "Emit a native object ('.o') file"), 84 clEnumValN(TargetMachine::CGFT_Null, "null", 85 "Emit nothing, for performance testing"), 86 clEnumValEnd)); 87 88cl::opt<bool> DisableDotLoc("disable-dot-loc", cl::Hidden, 89 cl::desc("Do not use .loc entries")); 90 91cl::opt<bool> DisableCFI("disable-cfi", cl::Hidden, 92 cl::desc("Do not use .cfi_* directives")); 93 94cl::opt<bool> EnableDwarfDirectory("enable-dwarf-directory", cl::Hidden, 95 cl::desc("Use .file directives with an explicit directory.")); 96 97cl::opt<bool> 98DisableRedZone("disable-red-zone", 99 cl::desc("Do not emit code that uses the red zone."), 100 cl::init(false)); 101 102cl::opt<bool> 103EnableFPMAD("enable-fp-mad", 104 cl::desc("Enable less precise MAD instructions to be generated"), 105 cl::init(false)); 106 107cl::opt<bool> 108DisableFPElim("disable-fp-elim", 109 cl::desc("Disable frame pointer elimination optimization"), 110 cl::init(false)); 111 112cl::opt<bool> 113DisableFPElimNonLeaf("disable-non-leaf-fp-elim", 114 cl::desc("Disable frame pointer elimination optimization for non-leaf funcs"), 115 cl::init(false)); 116 117cl::opt<bool> 118EnableUnsafeFPMath("enable-unsafe-fp-math", 119 cl::desc("Enable optimizations that may decrease FP precision"), 120 cl::init(false)); 121 122cl::opt<bool> 123EnableNoInfsFPMath("enable-no-infs-fp-math", 124 cl::desc("Enable FP math optimizations that assume no +-Infs"), 125 cl::init(false)); 126 127cl::opt<bool> 128EnableNoNaNsFPMath("enable-no-nans-fp-math", 129 cl::desc("Enable FP math optimizations that assume no NaNs"), 130 cl::init(false)); 131 132cl::opt<bool> 133EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math", 134 cl::Hidden, 135 cl::desc("Force codegen to assume rounding mode can change dynamically"), 136 cl::init(false)); 137 138cl::opt<bool> 139GenerateSoftFloatCalls("soft-float", 140 cl::desc("Generate software floating point library calls"), 141 cl::init(false)); 142 143cl::opt<llvm::FloatABI::ABIType> 144FloatABIForCalls("float-abi", 145 cl::desc("Choose float ABI type"), 146 cl::init(FloatABI::Default), 147 cl::values( 148 clEnumValN(FloatABI::Default, "default", 149 "Target default float ABI type"), 150 clEnumValN(FloatABI::Soft, "soft", 151 "Soft float ABI (implied by -soft-float)"), 152 clEnumValN(FloatABI::Hard, "hard", 153 "Hard float ABI (uses FP registers)"), 154 clEnumValEnd)); 155 156cl::opt<llvm::FPOpFusion::FPOpFusionMode> 157FuseFPOps("fp-contract", 158 cl::desc("Enable aggresive formation of fused FP ops"), 159 cl::init(FPOpFusion::Standard), 160 cl::values( 161 clEnumValN(FPOpFusion::Fast, "fast", 162 "Fuse FP ops whenever profitable"), 163 clEnumValN(FPOpFusion::Standard, "on", 164 "Only fuse 'blessed' FP ops."), 165 clEnumValN(FPOpFusion::Strict, "off", 166 "Only fuse FP ops when the result won't be effected."), 167 clEnumValEnd)); 168 169cl::opt<bool> 170DontPlaceZerosInBSS("nozero-initialized-in-bss", 171 cl::desc("Don't place zero-initialized symbols into bss section"), 172 cl::init(false)); 173 174cl::opt<bool> 175EnableGuaranteedTailCallOpt("tailcallopt", 176 cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."), 177 cl::init(false)); 178 179cl::opt<bool> 180DisableTailCalls("disable-tail-calls", 181 cl::desc("Never emit tail calls"), 182 cl::init(false)); 183 184cl::opt<unsigned> 185OverrideStackAlignment("stack-alignment", 186 cl::desc("Override default stack alignment"), 187 cl::init(0)); 188 189cl::opt<bool> 190EnableRealignStack("realign-stack", 191 cl::desc("Realign stack if needed"), 192 cl::init(true)); 193 194cl::opt<std::string> 195TrapFuncName("trap-func", cl::Hidden, 196 cl::desc("Emit a call to trap function rather than a trap instruction"), 197 cl::init("")); 198 199cl::opt<bool> 200EnablePIE("enable-pie", 201 cl::desc("Assume the creation of a position independent executable."), 202 cl::init(false)); 203 204cl::opt<bool> 205SegmentedStacks("segmented-stacks", 206 cl::desc("Use segmented stacks if possible."), 207 cl::init(false)); 208 209cl::opt<bool> 210UseInitArray("use-init-array", 211 cl::desc("Use .init_array instead of .ctors."), 212 cl::init(false)); 213 214cl::opt<std::string> StopAfter("stop-after", 215 cl::desc("Stop compilation after a specific pass"), 216 cl::value_desc("pass-name"), 217 cl::init("")); 218cl::opt<std::string> StartAfter("start-after", 219 cl::desc("Resume compilation after a specific pass"), 220 cl::value_desc("pass-name"), 221 cl::init("")); 222 223cl::opt<unsigned> 224SSPBufferSize("stack-protector-buffer-size", cl::init(8), 225 cl::desc("Lower bound for a buffer to be considered for " 226 "stack protection")); 227#endif 228