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<TargetMachine::CodeGenFileType>
  74 FileType("filetype", cl::init(TargetMachine::CGFT_AssemblyFile),
  75   cl::desc("Choose a file type (not all types are supported by all targets):"),
  76   cl::values(
  77              clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm",
  78                         "Emit an assembly ('.s') file"),
  79              clEnumValN(TargetMachine::CGFT_ObjectFile, "obj",
  80                         "Emit a native object ('.o') file"),
  81              clEnumValN(TargetMachine::CGFT_Null, "null",
  82                         "Emit nothing, for performance testing"),
  83              clEnumValEnd));
  84
  85 cl::opt<bool>
  86 DisableRedZone("disable-red-zone",
  87                cl::desc("Do not emit code that uses the red zone."),
  88                cl::init(false));
  89
  90 cl::opt<bool>
  91 EnableFPMAD("enable-fp-mad",
  92             cl::desc("Enable less precise MAD instructions to be generated"),
  93             cl::init(false));
  94
  95 cl::opt<bool>
  96 DisableFPElim("disable-fp-elim",
  97               cl::desc("Disable frame pointer elimination optimization"),
  98               cl::init(false));
  99
 100 cl::opt<bool>
 101 EnableUnsafeFPMath("enable-unsafe-fp-math",
 102                 cl::desc("Enable optimizations that may decrease FP precision"),
 103                 cl::init(false));
 104
 105 cl::opt<bool>
 106 EnableNoInfsFPMath("enable-no-infs-fp-math",
 107                 cl::desc("Enable FP math optimizations that assume no +-Infs"),
 108                 cl::init(false));
 109
 110 cl::opt<bool>
 111 EnableNoNaNsFPMath("enable-no-nans-fp-math",
 112                    cl::desc("Enable FP math optimizations that assume no NaNs"),
 113                    cl::init(false));
 114
 115 cl::opt<bool>
 116 EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math",
 117       cl::Hidden,
 118       cl::desc("Force codegen to assume rounding mode can change dynamically"),
 119       cl::init(false));
 120
 121 cl::opt<bool>
 122 GenerateSoftFloatCalls("soft-float",
 123                     cl::desc("Generate software floating point library calls"),
 124                     cl::init(false));
 125
 126 cl::opt<llvm::FloatABI::ABIType>
 127 FloatABIForCalls("float-abi",
 128                  cl::desc("Choose float ABI type"),
 129                  cl::init(FloatABI::Default),
 130                  cl::values(
 131                      clEnumValN(FloatABI::Default, "default",
 132                                 "Target default float ABI type"),
 133                      clEnumValN(FloatABI::Soft, "soft",
 134                                 "Soft float ABI (implied by -soft-float)"),
 135                      clEnumValN(FloatABI::Hard, "hard",
 136                                 "Hard float ABI (uses FP registers)"),
 137                      clEnumValEnd));
 138
 139 cl::opt<llvm::FPOpFusion::FPOpFusionMode>
 140 FuseFPOps("fp-contract",
 141           cl::desc("Enable aggressive formation of fused FP ops"),
 142           cl::init(FPOpFusion::Standard),
 143           cl::values(
 144               clEnumValN(FPOpFusion::Fast, "fast",
 145                          "Fuse FP ops whenever profitable"),
 146               clEnumValN(FPOpFusion::Standard, "on",
 147                          "Only fuse 'blessed' FP ops."),
 148               clEnumValN(FPOpFusion::Strict, "off",
 149                          "Only fuse FP ops when the result won't be effected."),
 150               clEnumValEnd));
 151
 152 cl::opt<bool>
 153 DontPlaceZerosInBSS("nozero-initialized-in-bss",
 154               cl::desc("Don't place zero-initialized symbols into bss section"),
 155               cl::init(false));
 156
 157 cl::opt<bool>
 158 EnableGuaranteedTailCallOpt("tailcallopt",
 159   cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
 160   cl::init(false));
 161
 162 cl::opt<bool>
 163 DisableTailCalls("disable-tail-calls",
 164                  cl::desc("Never emit tail calls"),
 165                  cl::init(false));
 166
 167 cl::opt<unsigned>
 168 OverrideStackAlignment("stack-alignment",
 169                        cl::desc("Override default stack alignment"),
 170                        cl::init(0));
 171
 172 cl::opt<std::string>
 173 TrapFuncName("trap-func", cl::Hidden,
 174         cl::desc("Emit a call to trap function rather than a trap instruction"),
 175         cl::init(""));
 176
 177 cl::opt<bool>
 178 EnablePIE("enable-pie",
 179           cl::desc("Assume the creation of a position independent executable."),
 180           cl::init(false));
 181
 182 cl::opt<bool>
 183 UseInitArray("use-init-array",
 184              cl::desc("Use .init_array instead of .ctors."),
 185              cl::init(false));
 186
 187 cl::opt<std::string> StopAfter("stop-after",
 188                             cl::desc("Stop compilation after a specific pass"),
 189                             cl::value_desc("pass-name"),
 190                                       cl::init(""));
 191 cl::opt<std::string> StartAfter("start-after",
 192                           cl::desc("Resume compilation after a specific pass"),
 193                           cl::value_desc("pass-name"),
 194                           cl::init(""));
 195
 196 cl::opt<bool> DataSections("data-sections",
 197                            cl::desc("Emit data into separate sections"),
 198                            cl::init(false));
 199
 200 cl::opt<bool>
 201 FunctionSections("function-sections",
 202                  cl::desc("Emit functions into separate sections"),
 203                  cl::init(false));
 204
 205 cl::opt<llvm::JumpTable::JumpTableType>
 206 JTableType("jump-table-type",
 207           cl::desc("Choose the type of Jump-Instruction Table for jumptable."),
 208           cl::init(JumpTable::Single),
 209           cl::values(
 210               clEnumValN(JumpTable::Single, "single",
 211                          "Create a single table for all jumptable functions"),
 212               clEnumValN(JumpTable::Arity, "arity",
 213                          "Create one table per number of parameters."),
 214               clEnumValN(JumpTable::Simplified, "simplified",
 215                          "Create one table per simplified function type."),
 216               clEnumValN(JumpTable::Full, "full",
 217                          "Create one table per unique function type."),
 218               clEnumValEnd));
 219
 220 // Common utility function tightly tied to the options listed here. Initializes
 221 // a TargetOptions object with CodeGen flags and returns it.
 222 static inline TargetOptions InitTargetOptionsFromCodeGenFlags() {
 223   TargetOptions Options;
 224   Options.LessPreciseFPMADOption = EnableFPMAD;
 225   Options.NoFramePointerElim = DisableFPElim;
 226   Options.AllowFPOpFusion = FuseFPOps;
 227   Options.UnsafeFPMath = EnableUnsafeFPMath;
 228   Options.NoInfsFPMath = EnableNoInfsFPMath;
 229   Options.NoNaNsFPMath = EnableNoNaNsFPMath;
 230   Options.HonorSignDependentRoundingFPMathOption =
 231       EnableHonorSignDependentRoundingFPMath;
 232   Options.UseSoftFloat = GenerateSoftFloatCalls;
 233   if (FloatABIForCalls != FloatABI::Default)
 234     Options.FloatABIType = FloatABIForCalls;
 235   Options.NoZerosInBSS = DontPlaceZerosInBSS;
 236   Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
 237   Options.DisableTailCalls = DisableTailCalls;
 238   Options.StackAlignmentOverride = OverrideStackAlignment;
 239   Options.TrapFuncName = TrapFuncName;
 240   Options.PositionIndependentExecutable = EnablePIE;
 241   Options.UseInitArray = UseInitArray;
 242   Options.DataSections = DataSections;
 243   Options.FunctionSections = FunctionSections;
 244
 245   Options.MCOptions = InitMCTargetOptionsFromFlags();
 246   Options.JTType = JTableType;
 247
 248   return Options;
 249 }
 250
 251 #endif