| //===-- 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/ADT/StringExtras.h" |
| #include "llvm/IR/Instructions.h" |
| #include "llvm/IR/Intrinsics.h" |
| #include "llvm/IR/Module.h" |
| #include "llvm/MC/MCTargetOptionsCommandFlags.h" |
| #include "llvm/MC/SubtargetFeature.h" |
| #include "llvm/Support/CodeGen.h" |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Support/Host.h" |
| #include "llvm/Target/TargetMachine.h" |
| #include "llvm/Target/TargetOptions.h" |
| #include "llvm/Target/TargetRecip.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<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 affected."), |
| clEnumValEnd)); |
| |
| cl::list<std::string> |
| ReciprocalOps("recip", |
| cl::CommaSeparated, |
| cl::desc("Choose reciprocal operation types and parameters."), |
| cl::value_desc("all,none,default,divf,!vec-sqrtd,vec-divd:0,sqrt:9...")); |
| |
| 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<std::string> |
| RunPass("run-pass", cl::desc("Run compiler only for one 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)); |
| |
| // 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.AllowFPOpFusion = FuseFPOps; |
| Options.Reciprocals = TargetRecip(ReciprocalOps); |
| Options.UnsafeFPMath = EnableUnsafeFPMath; |
| Options.NoInfsFPMath = EnableNoInfsFPMath; |
| Options.NoNaNsFPMath = EnableNoNaNsFPMath; |
| Options.HonorSignDependentRoundingFPMathOption = |
| EnableHonorSignDependentRoundingFPMath; |
| if (FloatABIForCalls != FloatABI::Default) |
| Options.FloatABIType = FloatABIForCalls; |
| Options.NoZerosInBSS = DontPlaceZerosInBSS; |
| Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt; |
| Options.StackAlignmentOverride = OverrideStackAlignment; |
| Options.PositionIndependentExecutable = EnablePIE; |
| Options.UseInitArray = !UseCtors; |
| Options.DataSections = DataSections; |
| Options.FunctionSections = FunctionSections; |
| Options.UniqueSectionNames = UniqueSectionNames; |
| |
| Options.MCOptions = InitMCTargetOptionsFromFlags(); |
| Options.JTType = JTableType; |
| |
| Options.ThreadModel = TMModel; |
| |
| return Options; |
| } |
| |
| static inline std::string getCPUStr() { |
| // If user asked for the 'native' CPU, autodetect here. If autodection fails, |
| // this will set the CPU to an empty string which tells the target to |
| // pick a basic default. |
| if (MCPU == "native") |
| return sys::getHostCPUName(); |
| |
| return MCPU; |
| } |
| |
| static inline std::string getFeaturesStr() { |
| SubtargetFeatures Features; |
| |
| // If user asked for the 'native' CPU, we need to autodetect features. |
| // This is necessary for x86 where the CPU might not support all the |
| // features the autodetected CPU name lists in the target. For example, |
| // not all Sandybridge processors support AVX. |
| if (MCPU == "native") { |
| StringMap<bool> HostFeatures; |
| if (sys::getHostCPUFeatures(HostFeatures)) |
| for (auto &F : HostFeatures) |
| Features.AddFeature(F.first(), F.second); |
| } |
| |
| for (unsigned i = 0; i != MAttrs.size(); ++i) |
| Features.AddFeature(MAttrs[i]); |
| |
| return Features.getString(); |
| } |
| |
| /// \brief Set function attributes of functions in Module M based on CPU, |
| /// Features, and command line flags. |
| static inline void setFunctionAttributes(StringRef CPU, StringRef Features, |
| Module &M) { |
| for (auto &F : M) { |
| auto &Ctx = F.getContext(); |
| AttributeSet Attrs = F.getAttributes(), NewAttrs; |
| |
| if (!CPU.empty()) |
| NewAttrs = NewAttrs.addAttribute(Ctx, AttributeSet::FunctionIndex, |
| "target-cpu", CPU); |
| |
| if (!Features.empty()) |
| NewAttrs = NewAttrs.addAttribute(Ctx, AttributeSet::FunctionIndex, |
| "target-features", Features); |
| |
| if (DisableFPElim.getNumOccurrences() > 0) |
| NewAttrs = NewAttrs.addAttribute(Ctx, AttributeSet::FunctionIndex, |
| "no-frame-pointer-elim", |
| DisableFPElim ? "true" : "false"); |
| |
| if (DisableTailCalls.getNumOccurrences() > 0) |
| NewAttrs = NewAttrs.addAttribute(Ctx, AttributeSet::FunctionIndex, |
| "disable-tail-calls", |
| toStringRef(DisableTailCalls)); |
| |
| if (TrapFuncName.getNumOccurrences() > 0) |
| for (auto &B : F) |
| for (auto &I : B) |
| if (auto *Call = dyn_cast<CallInst>(&I)) |
| if (const auto *F = Call->getCalledFunction()) |
| if (F->getIntrinsicID() == Intrinsic::debugtrap || |
| F->getIntrinsicID() == Intrinsic::trap) |
| Call->addAttribute(llvm::AttributeSet::FunctionIndex, |
| "trap-func-name", TrapFuncName); |
| |
| // Let NewAttrs override Attrs. |
| NewAttrs = Attrs.addAttributes(Ctx, AttributeSet::FunctionIndex, NewAttrs); |
| F.setAttributes(NewAttrs); |
| } |
| } |
| |
| #endif |