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//===-- CommandFlags.h - Command Line Flags Interface -----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains codegen-specific flags that are shared between different
// command line tools. The tools "llc" and "opt" both use this file to prevent
// flag duplication.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_COMMANDFLAGS_H
#define LLVM_CODEGEN_COMMANDFLAGS_H
#include "llvm/MC/MCTargetOptionsCommandFlags.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include <string>
using namespace llvm;
cl::opt<std::string>
MArch("march", cl::desc("Architecture to generate code for (see --version)"));
cl::opt<std::string>
MCPU("mcpu",
cl::desc("Target a specific cpu type (-mcpu=help for details)"),
cl::value_desc("cpu-name"),
cl::init(""));
cl::list<std::string>
MAttrs("mattr",
cl::CommaSeparated,
cl::desc("Target specific attributes (-mattr=help for details)"),
cl::value_desc("a1,+a2,-a3,..."));
cl::opt<Reloc::Model>
RelocModel("relocation-model",
cl::desc("Choose relocation model"),
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));
cl::opt<llvm::CodeModel::Model>
CMModel("code-model",
cl::desc("Choose code model"),
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));
cl::opt<TargetMachine::CodeGenFileType>
FileType("filetype", cl::init(TargetMachine::CGFT_AssemblyFile),
cl::desc("Choose a file type (not all types are supported by all targets):"),
cl::values(
clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm",
"Emit an assembly ('.s') file"),
clEnumValN(TargetMachine::CGFT_ObjectFile, "obj",
"Emit a native object ('.o') file"),
clEnumValN(TargetMachine::CGFT_Null, "null",
"Emit nothing, for performance testing"),
clEnumValEnd));
cl::opt<bool>
DisableRedZone("disable-red-zone",
cl::desc("Do not emit code that uses the red zone."),
cl::init(false));
cl::opt<bool>
EnableFPMAD("enable-fp-mad",
cl::desc("Enable less precise MAD instructions to be generated"),
cl::init(false));
cl::opt<bool>
DisableFPElim("disable-fp-elim",
cl::desc("Disable frame pointer elimination optimization"),
cl::init(false));
cl::opt<bool>
EnableUnsafeFPMath("enable-unsafe-fp-math",
cl::desc("Enable optimizations that may decrease FP precision"),
cl::init(false));
cl::opt<bool>
EnableNoInfsFPMath("enable-no-infs-fp-math",
cl::desc("Enable FP math optimizations that assume no +-Infs"),
cl::init(false));
cl::opt<bool>
EnableNoNaNsFPMath("enable-no-nans-fp-math",
cl::desc("Enable FP math optimizations that assume no NaNs"),
cl::init(false));
cl::opt<bool>
EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math",
cl::Hidden,
cl::desc("Force codegen to assume rounding mode can change dynamically"),
cl::init(false));
cl::opt<bool>
GenerateSoftFloatCalls("soft-float",
cl::desc("Generate software floating point library calls"),
cl::init(false));
cl::opt<llvm::FloatABI::ABIType>
FloatABIForCalls("float-abi",
cl::desc("Choose float ABI type"),
cl::init(FloatABI::Default),
cl::values(
clEnumValN(FloatABI::Default, "default",
"Target default float ABI type"),
clEnumValN(FloatABI::Soft, "soft",
"Soft float ABI (implied by -soft-float)"),
clEnumValN(FloatABI::Hard, "hard",
"Hard float ABI (uses FP registers)"),
clEnumValEnd));
cl::opt<llvm::FPOpFusion::FPOpFusionMode>
FuseFPOps("fp-contract",
cl::desc("Enable aggressive formation of fused FP ops"),
cl::init(FPOpFusion::Standard),
cl::values(
clEnumValN(FPOpFusion::Fast, "fast",
"Fuse FP ops whenever profitable"),
clEnumValN(FPOpFusion::Standard, "on",
"Only fuse 'blessed' FP ops."),
clEnumValN(FPOpFusion::Strict, "off",
"Only fuse FP ops when the result won't be effected."),
clEnumValEnd));
cl::opt<bool>
DontPlaceZerosInBSS("nozero-initialized-in-bss",
cl::desc("Don't place zero-initialized symbols into bss section"),
cl::init(false));
cl::opt<bool>
EnableGuaranteedTailCallOpt("tailcallopt",
cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
cl::init(false));
cl::opt<bool>
DisableTailCalls("disable-tail-calls",
cl::desc("Never emit tail calls"),
cl::init(false));
cl::opt<unsigned>
OverrideStackAlignment("stack-alignment",
cl::desc("Override default stack alignment"),
cl::init(0));
cl::opt<std::string>
TrapFuncName("trap-func", cl::Hidden,
cl::desc("Emit a call to trap function rather than a trap instruction"),
cl::init(""));
cl::opt<bool>
EnablePIE("enable-pie",
cl::desc("Assume the creation of a position independent executable."),
cl::init(false));
cl::opt<bool>
UseInitArray("use-init-array",
cl::desc("Use .init_array instead of .ctors."),
cl::init(false));
cl::opt<std::string> StopAfter("stop-after",
cl::desc("Stop compilation after a specific pass"),
cl::value_desc("pass-name"),
cl::init(""));
cl::opt<std::string> StartAfter("start-after",
cl::desc("Resume compilation after a specific pass"),
cl::value_desc("pass-name"),
cl::init(""));
// Common utility function tightly tied to the options listed here. Initializes
// a TargetOptions object with CodeGen flags and returns it.
static inline TargetOptions InitTargetOptionsFromCodeGenFlags() {
TargetOptions Options;
Options.LessPreciseFPMADOption = EnableFPMAD;
Options.NoFramePointerElim = DisableFPElim;
Options.AllowFPOpFusion = FuseFPOps;
Options.UnsafeFPMath = EnableUnsafeFPMath;
Options.NoInfsFPMath = EnableNoInfsFPMath;
Options.NoNaNsFPMath = EnableNoNaNsFPMath;
Options.HonorSignDependentRoundingFPMathOption =
EnableHonorSignDependentRoundingFPMath;
Options.UseSoftFloat = GenerateSoftFloatCalls;
if (FloatABIForCalls != FloatABI::Default)
Options.FloatABIType = FloatABIForCalls;
Options.NoZerosInBSS = DontPlaceZerosInBSS;
Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
Options.DisableTailCalls = DisableTailCalls;
Options.StackAlignmentOverride = OverrideStackAlignment;
Options.TrapFuncName = TrapFuncName;
Options.PositionIndependentExecutable = EnablePIE;
Options.UseInitArray = UseInitArray;
Options.MCOptions = InitMCTargetOptionsFromFlags();
return Options;
}
#endif
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