include/llvm/CodeGen/CommandFlags.h

   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_COMMANDFLAGS_H
  17 #define LLVM_CODEGEN_COMMANDFLAGS_H
  18
  19 #include "llvm/MC/MCTargetOptionsCommandFlags.h"
  20 #include "llvm/Support/CodeGen.h"
  21 #include "llvm/Support/CommandLine.h"
  22 #include "llvm/Target/TargetMachine.h"
  23 #include "llvm/Target/TargetOptions.h"
  24 #include <string>
  25 using namespace llvm;
  26
  27 cl::opt<std::string>
  28 MArch("march", cl::desc("Architecture to generate code for (see --version)"));
  29
  30 cl::opt<std::string>
  31 MCPU("mcpu",
  32      cl::desc("Target a specific cpu type (-mcpu=help for details)"),
  33      cl::value_desc("cpu-name"),
  34      cl::init(""));
  35
  36 cl::list<std::string>
  37 MAttrs("mattr",
  38        cl::CommaSeparated,
  39        cl::desc("Target specific attributes (-mattr=help for details)"),
  40        cl::value_desc("a1,+a2,-a3,..."));
  41
  42 cl::opt<Reloc::Model>
  43 RelocModel("relocation-model",
  44            cl::desc("Choose relocation model"),
  45            cl::init(Reloc::Default),
  46            cl::values(
  47               clEnumValN(Reloc::Default, "default",
  48                       "Target default relocation model"),
  49               clEnumValN(Reloc::Static, "static",
  50                       "Non-relocatable code"),
  51               clEnumValN(Reloc::PIC_, "pic",
  52                       "Fully relocatable, position independent code"),
  53               clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
  54                       "Relocatable external references, non-relocatable code"),
  55               clEnumValEnd));
  56
  57 cl::opt<llvm::CodeModel::Model>
  58 CMModel("code-model",
  59         cl::desc("Choose code model"),
  60         cl::init(CodeModel::Default),
  61         cl::values(clEnumValN(CodeModel::Default, "default",
  62                               "Target default code model"),
  63                    clEnumValN(CodeModel::Small, "small",
  64                               "Small code model"),
  65                    clEnumValN(CodeModel::Kernel, "kernel",
  66                               "Kernel code model"),
  67                    clEnumValN(CodeModel::Medium, "medium",
  68                               "Medium code model"),
  69                    clEnumValN(CodeModel::Large, "large",
  70                               "Large code model"),
  71                    clEnumValEnd));
  72
  73 cl::opt<bool>
  74 RelaxAll("mc-relax-all",
  75          cl::desc("When used with filetype=obj, "
  76                   "relax all fixups in the emitted object file"));
  77
  78 cl::opt<TargetMachine::CodeGenFileType>
  79 FileType("filetype", cl::init(TargetMachine::CGFT_AssemblyFile),
  80   cl::desc("Choose a file type (not all types are supported by all targets):"),
  81   cl::values(
  82              clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm",
  83                         "Emit an assembly ('.s') file"),
  84              clEnumValN(TargetMachine::CGFT_ObjectFile, "obj",
  85                         "Emit a native object ('.o') file"),
  86              clEnumValN(TargetMachine::CGFT_Null, "null",
  87                         "Emit nothing, for performance testing"),
  88              clEnumValEnd));
  89
  90 cl::opt<bool> EnableDwarfDirectory("enable-dwarf-directory", cl::Hidden,
  91                   cl::desc("Use .file directives with an explicit directory."));
  92
  93 cl::opt<bool>
  94 DisableRedZone("disable-red-zone",
  95                cl::desc("Do not emit code that uses the red zone."),
  96                cl::init(false));
  97
  98 cl::opt<bool>
  99 EnableFPMAD("enable-fp-mad",
 100             cl::desc("Enable less precise MAD instructions to be generated"),
 101             cl::init(false));
 102
 103 cl::opt<bool>
 104 DisableFPElim("disable-fp-elim",
 105               cl::desc("Disable frame pointer elimination optimization"),
 106               cl::init(false));
 107
 108 cl::opt<bool>
 109 EnableUnsafeFPMath("enable-unsafe-fp-math",
 110                 cl::desc("Enable optimizations that may decrease FP precision"),
 111                 cl::init(false));
 112
 113 cl::opt<bool>
 114 EnableNoInfsFPMath("enable-no-infs-fp-math",
 115                 cl::desc("Enable FP math optimizations that assume no +-Infs"),
 116                 cl::init(false));
 117
 118 cl::opt<bool>
 119 EnableNoNaNsFPMath("enable-no-nans-fp-math",
 120                    cl::desc("Enable FP math optimizations that assume no NaNs"),
 121                    cl::init(false));
 122
 123 cl::opt<bool>
 124 EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math",
 125       cl::Hidden,
 126       cl::desc("Force codegen to assume rounding mode can change dynamically"),
 127       cl::init(false));
 128
 129 cl::opt<bool>
 130 GenerateSoftFloatCalls("soft-float",
 131                     cl::desc("Generate software floating point library calls"),
 132                     cl::init(false));
 133
 134 cl::opt<llvm::FloatABI::ABIType>
 135 FloatABIForCalls("float-abi",
 136                  cl::desc("Choose float ABI type"),
 137                  cl::init(FloatABI::Default),
 138                  cl::values(
 139                      clEnumValN(FloatABI::Default, "default",
 140                                 "Target default float ABI type"),
 141                      clEnumValN(FloatABI::Soft, "soft",
 142                                 "Soft float ABI (implied by -soft-float)"),
 143                      clEnumValN(FloatABI::Hard, "hard",
 144                                 "Hard float ABI (uses FP registers)"),
 145                      clEnumValEnd));
 146
 147 cl::opt<llvm::FPOpFusion::FPOpFusionMode>
 148 FuseFPOps("fp-contract",
 149           cl::desc("Enable aggressive formation of fused FP ops"),
 150           cl::init(FPOpFusion::Standard),
 151           cl::values(
 152               clEnumValN(FPOpFusion::Fast, "fast",
 153                          "Fuse FP ops whenever profitable"),
 154               clEnumValN(FPOpFusion::Standard, "on",
 155                          "Only fuse 'blessed' FP ops."),
 156               clEnumValN(FPOpFusion::Strict, "off",
 157                          "Only fuse FP ops when the result won't be effected."),
 158               clEnumValEnd));
 159
 160 cl::opt<bool>
 161 DontPlaceZerosInBSS("nozero-initialized-in-bss",
 162               cl::desc("Don't place zero-initialized symbols into bss section"),
 163               cl::init(false));
 164
 165 cl::opt<bool>
 166 EnableGuaranteedTailCallOpt("tailcallopt",
 167   cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
 168   cl::init(false));
 169
 170 cl::opt<bool>
 171 DisableTailCalls("disable-tail-calls",
 172                  cl::desc("Never emit tail calls"),
 173                  cl::init(false));
 174
 175 cl::opt<unsigned>
 176 OverrideStackAlignment("stack-alignment",
 177                        cl::desc("Override default stack alignment"),
 178                        cl::init(0));
 179
 180 cl::opt<std::string>
 181 TrapFuncName("trap-func", cl::Hidden,
 182         cl::desc("Emit a call to trap function rather than a trap instruction"),
 183         cl::init(""));
 184
 185 cl::opt<bool>
 186 EnablePIE("enable-pie",
 187           cl::desc("Assume the creation of a position independent executable."),
 188           cl::init(false));
 189
 190 cl::opt<bool>
 191 UseInitArray("use-init-array",
 192              cl::desc("Use .init_array instead of .ctors."),
 193              cl::init(false));
 194
 195 cl::opt<std::string> StopAfter("stop-after",
 196                             cl::desc("Stop compilation after a specific pass"),
 197                             cl::value_desc("pass-name"),
 198                                       cl::init(""));
 199 cl::opt<std::string> StartAfter("start-after",
 200                           cl::desc("Resume compilation after a specific pass"),
 201                           cl::value_desc("pass-name"),
 202                           cl::init(""));
 203
 204 // Common utility function tightly tied to the options listed here. Initializes
 205 // a TargetOptions object with CodeGen flags and returns it.
 206 static inline TargetOptions InitTargetOptionsFromCodeGenFlags() {
 207   TargetOptions Options;
 208   Options.LessPreciseFPMADOption = EnableFPMAD;
 209   Options.NoFramePointerElim = DisableFPElim;
 210   Options.AllowFPOpFusion = FuseFPOps;
 211   Options.UnsafeFPMath = EnableUnsafeFPMath;
 212   Options.NoInfsFPMath = EnableNoInfsFPMath;
 213   Options.NoNaNsFPMath = EnableNoNaNsFPMath;
 214   Options.HonorSignDependentRoundingFPMathOption =
 215       EnableHonorSignDependentRoundingFPMath;
 216   Options.UseSoftFloat = GenerateSoftFloatCalls;
 217   if (FloatABIForCalls != FloatABI::Default)
 218     Options.FloatABIType = FloatABIForCalls;
 219   Options.NoZerosInBSS = DontPlaceZerosInBSS;
 220   Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
 221   Options.DisableTailCalls = DisableTailCalls;
 222   Options.StackAlignmentOverride = OverrideStackAlignment;
 223   Options.TrapFuncName = TrapFuncName;
 224   Options.PositionIndependentExecutable = EnablePIE;
 225   Options.UseInitArray = UseInitArray;
 226
 227   Options.MCOptions = InitMCTargetOptionsFromFlags();
 228
 229   return Options;
 230 }
 231
 232 #endif