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Diffstat (limited to 'include/llvm/CodeGen/CommandFlags.inc')
| -rw-r--r-- | include/llvm/CodeGen/CommandFlags.inc | 394 |
1 files changed, 394 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/CommandFlags.inc b/include/llvm/CodeGen/CommandFlags.inc new file mode 100644 index 000000000000..7d2d167289e0 --- /dev/null +++ b/include/llvm/CodeGen/CommandFlags.inc @@ -0,0 +1,394 @@ +//===-- 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. +// +//===----------------------------------------------------------------------===// + +#include "llvm/ADT/StringExtras.h" +#include "llvm/IR/Instructions.h" +#include "llvm/IR/Intrinsics.h" +#include "llvm/IR/Module.h" +#include "llvm/MC/MCTargetOptionsCommandFlags.inc" +#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 <string> +using namespace llvm; + +static cl::opt<std::string> + MArch("march", + cl::desc("Architecture to generate code for (see --version)")); + +static cl::opt<std::string> + MCPU("mcpu", + cl::desc("Target a specific cpu type (-mcpu=help for details)"), + cl::value_desc("cpu-name"), cl::init("")); + +static cl::list<std::string> + MAttrs("mattr", cl::CommaSeparated, + cl::desc("Target specific attributes (-mattr=help for details)"), + cl::value_desc("a1,+a2,-a3,...")); + +static cl::opt<Reloc::Model> RelocModel( + "relocation-model", cl::desc("Choose relocation model"), + cl::values( + 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"), + clEnumValN(Reloc::ROPI, "ropi", + "Code and read-only data relocatable, accessed PC-relative"), + clEnumValN( + Reloc::RWPI, "rwpi", + "Read-write data relocatable, accessed relative to static base"), + clEnumValN(Reloc::ROPI_RWPI, "ropi-rwpi", + "Combination of ropi and rwpi"))); + +LLVM_ATTRIBUTE_UNUSED static Optional<Reloc::Model> getRelocModel() { + if (RelocModel.getNumOccurrences()) { + Reloc::Model R = RelocModel; + return R; + } + return None; +} + +static 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"))); + +static cl::opt<llvm::CodeModel::Model> CMModel( + "code-model", cl::desc("Choose code model"), + cl::values(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"))); + +LLVM_ATTRIBUTE_UNUSED static Optional<CodeModel::Model> getCodeModel() { + if (CMModel.getNumOccurrences()) { + CodeModel::Model M = CMModel; + return M; + } + return None; +} + +static cl::opt<llvm::ExceptionHandling> ExceptionModel( + "exception-model", cl::desc("exception model"), + cl::init(ExceptionHandling::None), + cl::values( + clEnumValN(ExceptionHandling::None, "default", + "default exception handling model"), + clEnumValN(ExceptionHandling::DwarfCFI, "dwarf", + "DWARF-like CFI based exception handling"), + clEnumValN(ExceptionHandling::SjLj, "sjlj", "SjLj exception handling"), + clEnumValN(ExceptionHandling::ARM, "arm", "ARM EHABI exceptions"), + clEnumValN(ExceptionHandling::WinEH, "wineh", + "Windows exception model"), + clEnumValN(ExceptionHandling::Wasm, "wasm", + "WebAssembly exception handling"))); + +static 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"))); + +static cl::opt<bool> + DisableFPElim("disable-fp-elim", + cl::desc("Disable frame pointer elimination optimization"), + cl::init(false)); + +static cl::opt<bool> EnableUnsafeFPMath( + "enable-unsafe-fp-math", + cl::desc("Enable optimizations that may decrease FP precision"), + cl::init(false)); + +static cl::opt<bool> EnableNoInfsFPMath( + "enable-no-infs-fp-math", + cl::desc("Enable FP math optimizations that assume no +-Infs"), + cl::init(false)); + +static cl::opt<bool> EnableNoNaNsFPMath( + "enable-no-nans-fp-math", + cl::desc("Enable FP math optimizations that assume no NaNs"), + cl::init(false)); + +static cl::opt<bool> EnableNoSignedZerosFPMath( + "enable-no-signed-zeros-fp-math", + cl::desc("Enable FP math optimizations that assume " + "the sign of 0 is insignificant"), + cl::init(false)); + +static cl::opt<bool> + EnableNoTrappingFPMath("enable-no-trapping-fp-math", + cl::desc("Enable setting the FP exceptions build " + "attribute not to use exceptions"), + cl::init(false)); + +static cl::opt<llvm::FPDenormal::DenormalMode> DenormalMode( + "denormal-fp-math", + cl::desc("Select which denormal numbers the code is permitted to require"), + cl::init(FPDenormal::IEEE), + cl::values(clEnumValN(FPDenormal::IEEE, "ieee", + "IEEE 754 denormal numbers"), + clEnumValN(FPDenormal::PreserveSign, "preserve-sign", + "the sign of a flushed-to-zero number is preserved " + "in the sign of 0"), + clEnumValN(FPDenormal::PositiveZero, "positive-zero", + "denormals are flushed to positive zero"))); + +static 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)); + +static 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)"))); + +static 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."))); + +static cl::opt<bool> DontPlaceZerosInBSS( + "nozero-initialized-in-bss", + cl::desc("Don't place zero-initialized symbols into bss section"), + cl::init(false)); + +static cl::opt<bool> EnableGuaranteedTailCallOpt( + "tailcallopt", + cl::desc( + "Turn fastcc calls into tail calls by (potentially) changing ABI."), + cl::init(false)); + +static cl::opt<bool> DisableTailCalls("disable-tail-calls", + cl::desc("Never emit tail calls"), + cl::init(false)); + +static cl::opt<bool> StackSymbolOrdering("stack-symbol-ordering", + cl::desc("Order local stack symbols."), + cl::init(true)); + +static cl::opt<unsigned> + OverrideStackAlignment("stack-alignment", + cl::desc("Override default stack alignment"), + cl::init(0)); + +static cl::opt<bool> + StackRealign("stackrealign", + cl::desc("Force align the stack to the minimum alignment"), + cl::init(false)); + +static cl::opt<std::string> TrapFuncName( + "trap-func", cl::Hidden, + cl::desc("Emit a call to trap function rather than a trap instruction"), + cl::init("")); + +static cl::opt<bool> UseCtors("use-ctors", + cl::desc("Use .ctors instead of .init_array."), + cl::init(false)); + +static cl::opt<bool> RelaxELFRelocations( + "relax-elf-relocations", + cl::desc("Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF"), + cl::init(false)); + +static cl::opt<bool> DataSections("data-sections", + cl::desc("Emit data into separate sections"), + cl::init(false)); + +static cl::opt<bool> + FunctionSections("function-sections", + cl::desc("Emit functions into separate sections"), + cl::init(false)); + +static cl::opt<bool> EmulatedTLS("emulated-tls", + cl::desc("Use emulated TLS model"), + cl::init(false)); + +static cl::opt<bool> + UniqueSectionNames("unique-section-names", + cl::desc("Give unique names to every section"), + cl::init(true)); + +static cl::opt<llvm::EABI> + EABIVersion("meabi", cl::desc("Set EABI type (default depends on triple):"), + cl::init(EABI::Default), + cl::values(clEnumValN(EABI::Default, "default", + "Triple default EABI version"), + clEnumValN(EABI::EABI4, "4", "EABI version 4"), + clEnumValN(EABI::EABI5, "5", "EABI version 5"), + clEnumValN(EABI::GNU, "gnu", "EABI GNU"))); + +static cl::opt<DebuggerKind> DebuggerTuningOpt( + "debugger-tune", cl::desc("Tune debug info for a particular debugger"), + cl::init(DebuggerKind::Default), + cl::values(clEnumValN(DebuggerKind::GDB, "gdb", "gdb"), + clEnumValN(DebuggerKind::LLDB, "lldb", "lldb"), + clEnumValN(DebuggerKind::SCE, "sce", "SCE targets (e.g. PS4)"))); + +static cl::opt<bool> EnableStackSizeSection( + "stack-size-section", + cl::desc("Emit a section containing stack size metadata"), cl::init(false)); + +static cl::opt<bool> + EnableAddrsig("addrsig", cl::desc("Emit an address-significance table"), + cl::init(false)); + +// Common utility function tightly tied to the options listed here. Initializes +// a TargetOptions object with CodeGen flags and returns it. +static TargetOptions InitTargetOptionsFromCodeGenFlags() { + TargetOptions Options; + Options.AllowFPOpFusion = FuseFPOps; + Options.UnsafeFPMath = EnableUnsafeFPMath; + Options.NoInfsFPMath = EnableNoInfsFPMath; + Options.NoNaNsFPMath = EnableNoNaNsFPMath; + Options.NoSignedZerosFPMath = EnableNoSignedZerosFPMath; + Options.NoTrappingFPMath = EnableNoTrappingFPMath; + Options.FPDenormalMode = DenormalMode; + Options.HonorSignDependentRoundingFPMathOption = + EnableHonorSignDependentRoundingFPMath; + if (FloatABIForCalls != FloatABI::Default) + Options.FloatABIType = FloatABIForCalls; + Options.NoZerosInBSS = DontPlaceZerosInBSS; + Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt; + Options.StackAlignmentOverride = OverrideStackAlignment; + Options.StackSymbolOrdering = StackSymbolOrdering; + Options.UseInitArray = !UseCtors; + Options.RelaxELFRelocations = RelaxELFRelocations; + Options.DataSections = DataSections; + Options.FunctionSections = FunctionSections; + Options.UniqueSectionNames = UniqueSectionNames; + Options.EmulatedTLS = EmulatedTLS; + Options.ExplicitEmulatedTLS = EmulatedTLS.getNumOccurrences() > 0; + Options.ExceptionModel = ExceptionModel; + Options.EmitStackSizeSection = EnableStackSizeSection; + Options.EmitAddrsig = EnableAddrsig; + + Options.MCOptions = InitMCTargetOptionsFromFlags(); + + Options.ThreadModel = TMModel; + Options.EABIVersion = EABIVersion; + Options.DebuggerTuning = DebuggerTuningOpt; + + return Options; +} + +LLVM_ATTRIBUTE_UNUSED static 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; +} + +LLVM_ATTRIBUTE_UNUSED static 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(); +} + +LLVM_ATTRIBUTE_UNUSED static std::vector<std::string> getFeatureList() { + 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.getFeatures(); +} + +/// Set function attributes of functions in Module M based on CPU, +/// Features, and command line flags. +LLVM_ATTRIBUTE_UNUSED static void +setFunctionAttributes(StringRef CPU, StringRef Features, Module &M) { + for (auto &F : M) { + auto &Ctx = F.getContext(); + AttributeList Attrs = F.getAttributes(); + AttrBuilder NewAttrs; + + if (!CPU.empty()) + NewAttrs.addAttribute("target-cpu", CPU); + if (!Features.empty()) + NewAttrs.addAttribute("target-features", Features); + if (DisableFPElim.getNumOccurrences() > 0) + NewAttrs.addAttribute("no-frame-pointer-elim", + DisableFPElim ? "true" : "false"); + if (DisableTailCalls.getNumOccurrences() > 0) + NewAttrs.addAttribute("disable-tail-calls", + toStringRef(DisableTailCalls)); + if (StackRealign) + NewAttrs.addAttribute("stackrealign"); + + 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::AttributeList::FunctionIndex, + Attribute::get(Ctx, "trap-func-name", TrapFuncName)); + + // Let NewAttrs override Attrs. + F.setAttributes( + Attrs.addAttributes(Ctx, AttributeList::FunctionIndex, NewAttrs)); + } +} |