| //===-- 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<ThreadModel::Model> |
| TMModel("thread-model", |
| cl::desc("Choose threading model"), |
| cl::init(ThreadModel::POSIX), |
| cl::values(clEnumValN(ThreadModel::POSIX, "posix", |
| "POSIX thread model"), |
| clEnumValN(ThreadModel::Single, "single", |
| "Single thread model"), |
| 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> |
| 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> |
| UseCtors("use-ctors", |
| cl::desc("Use .ctors instead of .init_array."), |
| 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("")); |
| |
| cl::opt<bool> DataSections("data-sections", |
| cl::desc("Emit data into separate sections"), |
| cl::init(false)); |
| |
| cl::opt<bool> |
| FunctionSections("function-sections", |
| cl::desc("Emit functions into separate sections"), |
| cl::init(false)); |
| |
| cl::opt<bool> UniqueSectionNames("unique-section-names", |
| cl::desc("Give unique names to every section"), |
| cl::init(true)); |
| |
| cl::opt<llvm::JumpTable::JumpTableType> |
| JTableType("jump-table-type", |
| cl::desc("Choose the type of Jump-Instruction Table for jumptable."), |
| cl::init(JumpTable::Single), |
| cl::values( |
| clEnumValN(JumpTable::Single, "single", |
| "Create a single table for all jumptable functions"), |
| clEnumValN(JumpTable::Arity, "arity", |
| "Create one table per number of parameters."), |
| clEnumValN(JumpTable::Simplified, "simplified", |
| "Create one table per simplified function type."), |
| clEnumValN(JumpTable::Full, "full", |
| "Create one table per unique function type."), |
| clEnumValEnd)); |
| |
| cl::opt<bool> |
| FCFI("fcfi", |
| cl::desc("Apply forward-edge control-flow integrity"), |
| cl::init(false)); |
| |
| cl::opt<llvm::CFIntegrity> |
| CFIType("cfi-type", |
| cl::desc("Choose the type of Control-Flow Integrity check to add"), |
| cl::init(CFIntegrity::Sub), |
| cl::values( |
| clEnumValN(CFIntegrity::Sub, "sub", |
| "Subtract the pointer from the table base, then mask."), |
| clEnumValN(CFIntegrity::Ror, "ror", |
| "Use rotate to check the offset from a table base."), |
| clEnumValN(CFIntegrity::Add, "add", |
| "Mask out the high bits and add to an aligned base."), |
| clEnumValEnd)); |
| |
| cl::opt<bool> |
| CFIEnforcing("cfi-enforcing", |
| cl::desc("Enforce CFI or pass the violation to a function."), |
| cl::init(false)); |
| |
| // Note that this option is linked to the cfi-enforcing option above: if |
| // cfi-enforcing is set, then the cfi-func-name option is entirely ignored. If |
| // cfi-enforcing is false and no cfi-func-name is set, then a default function |
| // will be generated that ignores all CFI violations. The expected signature for |
| // functions called with CFI violations is |
| // |
| // void (i8*, i8*) |
| // |
| // The first pointer is a C string containing the name of the function in which |
| // the violation occurs, and the second pointer is the pointer that violated |
| // CFI. |
| cl::opt<std::string> |
| CFIFuncName("cfi-func-name", cl::desc("The name of the CFI function to call"), |
| 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 = !UseCtors; |
| Options.DataSections = DataSections; |
| Options.FunctionSections = FunctionSections; |
| Options.UniqueSectionNames = UniqueSectionNames; |
| |
| Options.MCOptions = InitMCTargetOptionsFromFlags(); |
| Options.JTType = JTableType; |
| Options.FCFI = FCFI; |
| Options.CFIType = CFIType; |
| Options.CFIEnforcing = CFIEnforcing; |
| Options.CFIFuncName = CFIFuncName; |
| |
| Options.ThreadModel = TMModel; |
| |
| return Options; |
| } |
| |
| #endif |