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/Support/CodeGen.h"
  20 #include "llvm/Support/CommandLine.h"
  21 #include "llvm/Target/TargetMachine.h"
  22 #include "llvm/Target/TargetOptions.h"
  23 #include <string>
  24 using namespace llvm;
  25
  26 cl::opt<std::string>
  27 MArch("march", cl::desc("Architecture to generate code for (see --version)"));
  28
  29 cl::opt<std::string>
  30 MCPU("mcpu",
  31      cl::desc("Target a specific cpu type (-mcpu=help for details)"),
  32      cl::value_desc("cpu-name"),
  33      cl::init(""));
  34
  35 cl::list<std::string>
  36 MAttrs("mattr",
  37        cl::CommaSeparated,
  38        cl::desc("Target specific attributes (-mattr=help for details)"),
  39        cl::value_desc("a1,+a2,-a3,..."));
  40
  41 cl::opt<Reloc::Model>
  42 RelocModel("relocation-model",
  43            cl::desc("Choose relocation model"),
  44            cl::init(Reloc::Default),
  45            cl::values(
  46               clEnumValN(Reloc::Default, "default",
  47                       "Target default relocation model"),
  48               clEnumValN(Reloc::Static, "static",
  49                       "Non-relocatable code"),
  50               clEnumValN(Reloc::PIC_, "pic",
  51                       "Fully relocatable, position independent code"),
  52               clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
  53                       "Relocatable external references, non-relocatable code"),
  54               clEnumValEnd));
  55
  56 cl::opt<llvm::CodeModel::Model>
  57 CMModel("code-model",
  58         cl::desc("Choose code model"),
  59         cl::init(CodeModel::Default),
  60         cl::values(clEnumValN(CodeModel::Default, "default",
  61                               "Target default code model"),
  62                    clEnumValN(CodeModel::Small, "small",
  63                               "Small code model"),
  64                    clEnumValN(CodeModel::Kernel, "kernel",
  65                               "Kernel code model"),
  66                    clEnumValN(CodeModel::Medium, "medium",
  67                               "Medium code model"),
  68                    clEnumValN(CodeModel::Large, "large",
  69                               "Large code model"),
  70                    clEnumValEnd));
  71
  72 cl::opt<bool>
  73 RelaxAll("mc-relax-all",
  74          cl::desc("When used with filetype=obj, "
  75                   "relax all fixups in the emitted object file"));
  76
  77 cl::opt<TargetMachine::CodeGenFileType>
  78 FileType("filetype", cl::init(TargetMachine::CGFT_AssemblyFile),
  79   cl::desc("Choose a file type (not all types are supported by all targets):"),
  80   cl::values(
  81              clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm",
  82                         "Emit an assembly ('.s') file"),
  83              clEnumValN(TargetMachine::CGFT_ObjectFile, "obj",
  84                         "Emit a native object ('.o') file"),
  85              clEnumValN(TargetMachine::CGFT_Null, "null",
  86                         "Emit nothing, for performance testing"),
  87              clEnumValEnd));
  88
  89 cl::opt<bool> DisableCFI("disable-cfi", cl::Hidden,
  90                          cl::desc("Do not use .cfi_* directives"));
  91
  92 cl::opt<bool> EnableDwarfDirectory("enable-dwarf-directory", cl::Hidden,
  93                   cl::desc("Use .file directives with an explicit directory."));
  94
  95 cl::opt<bool>
  96 DisableRedZone("disable-red-zone",
  97                cl::desc("Do not emit code that uses the red zone."),
  98                cl::init(false));
  99
 100 cl::opt<bool>
 101 EnableFPMAD("enable-fp-mad",
 102             cl::desc("Enable less precise MAD instructions to be generated"),
 103             cl::init(false));
 104
 105 cl::opt<bool>
 106 DisableFPElim("disable-fp-elim",
 107               cl::desc("Disable frame pointer elimination optimization"),
 108               cl::init(false));
 109
 110 cl::opt<bool>
 111 EnableUnsafeFPMath("enable-unsafe-fp-math",
 112                 cl::desc("Enable optimizations that may decrease FP precision"),
 113                 cl::init(false));
 114
 115 cl::opt<bool>
 116 EnableNoInfsFPMath("enable-no-infs-fp-math",
 117                 cl::desc("Enable FP math optimizations that assume no +-Infs"),
 118                 cl::init(false));
 119
 120 cl::opt<bool>
 121 EnableNoNaNsFPMath("enable-no-nans-fp-math",
 122                    cl::desc("Enable FP math optimizations that assume no NaNs"),
 123                    cl::init(false));
 124
 125 cl::opt<bool>
 126 EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math",
 127       cl::Hidden,
 128       cl::desc("Force codegen to assume rounding mode can change dynamically"),
 129       cl::init(false));
 130
 131 cl::opt<bool>
 132 GenerateSoftFloatCalls("soft-float",
 133                     cl::desc("Generate software floating point library calls"),
 134                     cl::init(false));
 135
 136 cl::opt<llvm::FloatABI::ABIType>
 137 FloatABIForCalls("float-abi",
 138                  cl::desc("Choose float ABI type"),
 139                  cl::init(FloatABI::Default),
 140                  cl::values(
 141                      clEnumValN(FloatABI::Default, "default",
 142                                 "Target default float ABI type"),
 143                      clEnumValN(FloatABI::Soft, "soft",
 144                                 "Soft float ABI (implied by -soft-float)"),
 145                      clEnumValN(FloatABI::Hard, "hard",
 146                                 "Hard float ABI (uses FP registers)"),
 147                      clEnumValEnd));
 148
 149 cl::opt<llvm::FPOpFusion::FPOpFusionMode>
 150 FuseFPOps("fp-contract",
 151           cl::desc("Enable aggressive formation of fused FP ops"),
 152           cl::init(FPOpFusion::Standard),
 153           cl::values(
 154               clEnumValN(FPOpFusion::Fast, "fast",
 155                          "Fuse FP ops whenever profitable"),
 156               clEnumValN(FPOpFusion::Standard, "on",
 157                          "Only fuse 'blessed' FP ops."),
 158               clEnumValN(FPOpFusion::Strict, "off",
 159                          "Only fuse FP ops when the result won't be effected."),
 160               clEnumValEnd));
 161
 162 cl::opt<bool>
 163 DontPlaceZerosInBSS("nozero-initialized-in-bss",
 164               cl::desc("Don't place zero-initialized symbols into bss section"),
 165               cl::init(false));
 166
 167 cl::opt<bool>
 168 EnableGuaranteedTailCallOpt("tailcallopt",
 169   cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
 170   cl::init(false));
 171
 172 cl::opt<bool>
 173 DisableTailCalls("disable-tail-calls",
 174                  cl::desc("Never emit tail calls"),
 175                  cl::init(false));
 176
 177 cl::opt<unsigned>
 178 OverrideStackAlignment("stack-alignment",
 179                        cl::desc("Override default stack alignment"),
 180                        cl::init(0));
 181
 182 cl::opt<std::string>
 183 TrapFuncName("trap-func", cl::Hidden,
 184         cl::desc("Emit a call to trap function rather than a trap instruction"),
 185         cl::init(""));
 186
 187 cl::opt<bool>
 188 EnablePIE("enable-pie",
 189           cl::desc("Assume the creation of a position independent executable."),
 190           cl::init(false));
 191
 192 cl::opt<bool>
 193 SegmentedStacks("segmented-stacks",
 194                 cl::desc("Use segmented stacks if possible."),
 195                 cl::init(false));
 196
 197 cl::opt<bool>
 198 UseInitArray("use-init-array",
 199              cl::desc("Use .init_array instead of .ctors."),
 200              cl::init(false));
 201
 202 cl::opt<std::string> StopAfter("stop-after",
 203                             cl::desc("Stop compilation after a specific pass"),
 204                             cl::value_desc("pass-name"),
 205                                       cl::init(""));
 206 cl::opt<std::string> StartAfter("start-after",
 207                           cl::desc("Resume compilation after a specific pass"),
 208                           cl::value_desc("pass-name"),
 209                           cl::init(""));
 210
 211 // Common utility function tightly tied to the options listed here. Initializes
 212 // a TargetOptions object with CodeGen flags and returns it.
 213 static inline TargetOptions InitTargetOptionsFromCodeGenFlags() {
 214   TargetOptions Options;
 215   Options.LessPreciseFPMADOption = EnableFPMAD;
 216   Options.NoFramePointerElim = DisableFPElim;
 217   Options.AllowFPOpFusion = FuseFPOps;
 218   Options.UnsafeFPMath = EnableUnsafeFPMath;
 219   Options.NoInfsFPMath = EnableNoInfsFPMath;
 220   Options.NoNaNsFPMath = EnableNoNaNsFPMath;
 221   Options.HonorSignDependentRoundingFPMathOption =
 222       EnableHonorSignDependentRoundingFPMath;
 223   Options.UseSoftFloat = GenerateSoftFloatCalls;
 224   if (FloatABIForCalls != FloatABI::Default)
 225     Options.FloatABIType = FloatABIForCalls;
 226   Options.NoZerosInBSS = DontPlaceZerosInBSS;
 227   Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
 228   Options.DisableTailCalls = DisableTailCalls;
 229   Options.StackAlignmentOverride = OverrideStackAlignment;
 230   Options.TrapFuncName = TrapFuncName;
 231   Options.PositionIndependentExecutable = EnablePIE;
 232   Options.EnableSegmentedStacks = SegmentedStacks;
 233   Options.UseInitArray = UseInitArray;
 234   return Options;
 235 }
 236
 237 #endif