Replace MCTargetOptionsCommandFlags.inc and CommandFlags.inc by runtime registration
MCTargetOptionsCommandFlags.inc and CommandFlags.inc are headers which contain
cl::opt with static storage.
These headers are meant to be incuded by tools to make it easier to parametrize
codegen/mc.
However, these headers are also included in at least two libraries: lldCommon
and handle-llvm. As a result, when creating DYLIB, clang-cpp holds a reference
to the options, and lldCommon holds another reference. Linking the two in a
single executable, as zig does[0], results in a double registration.
This patch explores an other approach: the .inc files are moved to regular
files, and the registration happens on-demand through static declaration of
options in the constructor of a static object.
[0] https://bugzilla.redhat.com/show_bug.cgi?id=1756977#c5
Differential Revision: https://reviews.llvm.org/D75579
diff --git a/llvm/lib/CodeGen/CMakeLists.txt b/llvm/lib/CodeGen/CMakeLists.txt
index 0d3ecc1..6120fad 100644
--- a/llvm/lib/CodeGen/CMakeLists.txt
+++ b/llvm/lib/CodeGen/CMakeLists.txt
@@ -15,6 +15,7 @@
CFIInstrInserter.cpp
CodeGen.cpp
CodeGenPrepare.cpp
+ CommandFlags.cpp
CriticalAntiDepBreaker.cpp
DeadMachineInstructionElim.cpp
DetectDeadLanes.cpp
diff --git a/llvm/lib/CodeGen/CommandFlags.cpp b/llvm/lib/CodeGen/CommandFlags.cpp
new file mode 100644
index 0000000..7acb84d
--- /dev/null
+++ b/llvm/lib/CodeGen/CommandFlags.cpp
@@ -0,0 +1,588 @@
+//===-- CommandFlags.cpp - Command Line Flags Interface ---------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// 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/CodeGen/CommandFlags.h"
+
+using namespace llvm;
+
+#define CGOPT(TY, NAME) \
+ static cl::opt<TY> *NAME##View; \
+ TY codegen::get##NAME() { \
+ assert(NAME##View && "RegisterCodeGenFlags not created."); \
+ return *NAME##View; \
+ }
+
+#define CGLIST(TY, NAME) \
+ static cl::list<TY> *NAME##View; \
+ std::vector<TY> codegen::get##NAME() { \
+ assert(NAME##View && "RegisterCodeGenFlags not created."); \
+ return *NAME##View; \
+ }
+
+#define CGOPT_EXP(TY, NAME) \
+ CGOPT(TY, NAME) \
+ Optional<TY> codegen::getExplicit##NAME() { \
+ if (NAME##View->getNumOccurrences()) { \
+ TY res = *NAME##View; \
+ return res; \
+ } \
+ return None; \
+ }
+
+CGOPT(std::string, MArch)
+CGOPT(std::string, MCPU)
+CGLIST(std::string, MAttrs)
+CGOPT_EXP(Reloc::Model, RelocModel)
+CGOPT(ThreadModel::Model, ThreadModel)
+CGOPT_EXP(CodeModel::Model, CodeModel)
+CGOPT(ExceptionHandling, ExceptionModel)
+CGOPT_EXP(CodeGenFileType, FileType)
+CGOPT(FramePointer::FP, FramePointerUsage)
+CGOPT(bool, EnableUnsafeFPMath)
+CGOPT(bool, EnableNoInfsFPMath)
+CGOPT(bool, EnableNoNaNsFPMath)
+CGOPT(bool, EnableNoSignedZerosFPMath)
+CGOPT(bool, EnableNoTrappingFPMath)
+CGOPT(FPDenormal::DenormalMode, DenormalFPMath)
+CGOPT(bool, EnableHonorSignDependentRoundingFPMath)
+CGOPT(FloatABI::ABIType, FloatABIForCalls)
+CGOPT(FPOpFusion::FPOpFusionMode, FuseFPOps)
+CGOPT(bool, DontPlaceZerosInBSS)
+CGOPT(bool, EnableGuaranteedTailCallOpt)
+CGOPT(bool, DisableTailCalls)
+CGOPT(bool, StackSymbolOrdering)
+CGOPT(unsigned, OverrideStackAlignment)
+CGOPT(bool, StackRealign)
+CGOPT(std::string, TrapFuncName)
+CGOPT(bool, UseCtors)
+CGOPT(bool, RelaxELFRelocations)
+CGOPT_EXP(bool, DataSections)
+CGOPT_EXP(bool, FunctionSections)
+CGOPT(std::string, BBSections)
+CGOPT(unsigned, TLSSize)
+CGOPT(bool, EmulatedTLS)
+CGOPT(bool, UniqueSectionNames)
+CGOPT(bool, UniqueBBSectionNames)
+CGOPT(EABI, EABIVersion)
+CGOPT(DebuggerKind, DebuggerTuningOpt)
+CGOPT(bool, EnableStackSizeSection)
+CGOPT(bool, EnableAddrsig)
+CGOPT(bool, EmitCallSiteInfo)
+CGOPT(bool, EnableDebugEntryValues)
+CGOPT(bool, ForceDwarfFrameSection)
+
+codegen::RegisterCodeGenFlags::RegisterCodeGenFlags() {
+#define CGBINDOPT(NAME) \
+ do { \
+ NAME##View = std::addressof(NAME); \
+ } while (0)
+
+ static cl::opt<std::string> MArch(
+ "march", cl::desc("Architecture to generate code for (see --version)"));
+ CGBINDOPT(MArch);
+
+ 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(""));
+ CGBINDOPT(MCPU);
+
+ static cl::list<std::string> MAttrs(
+ "mattr", cl::CommaSeparated,
+ cl::desc("Target specific attributes (-mattr=help for details)"),
+ cl::value_desc("a1,+a2,-a3,..."));
+ CGBINDOPT(MAttrs);
+
+ 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")));
+ CGBINDOPT(RelocModel);
+
+ static cl::opt<ThreadModel::Model> ThreadModel(
+ "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")));
+ CGBINDOPT(ThreadModel);
+
+ static cl::opt<CodeModel::Model> CodeModel(
+ "code-model", cl::desc("Choose code model"),
+ cl::values(clEnumValN(CodeModel::Tiny, "tiny", "Tiny 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")));
+ CGBINDOPT(CodeModel);
+
+ static cl::opt<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")));
+ CGBINDOPT(ExceptionModel);
+
+ static cl::opt<CodeGenFileType> FileType(
+ "filetype", cl::init(CGFT_AssemblyFile),
+ cl::desc(
+ "Choose a file type (not all types are supported by all targets):"),
+ cl::values(
+ clEnumValN(CGFT_AssemblyFile, "asm", "Emit an assembly ('.s') file"),
+ clEnumValN(CGFT_ObjectFile, "obj",
+ "Emit a native object ('.o') file"),
+ clEnumValN(CGFT_Null, "null",
+ "Emit nothing, for performance testing")));
+ CGBINDOPT(FileType);
+
+ static cl::opt<FramePointer::FP> FramePointerUsage(
+ "frame-pointer",
+ cl::desc("Specify frame pointer elimination optimization"),
+ cl::init(FramePointer::None),
+ cl::values(
+ clEnumValN(FramePointer::All, "all",
+ "Disable frame pointer elimination"),
+ clEnumValN(FramePointer::NonLeaf, "non-leaf",
+ "Disable frame pointer elimination for non-leaf frame"),
+ clEnumValN(FramePointer::None, "none",
+ "Enable frame pointer elimination")));
+ CGBINDOPT(FramePointerUsage);
+
+ static cl::opt<bool> EnableUnsafeFPMath(
+ "enable-unsafe-fp-math",
+ cl::desc("Enable optimizations that may decrease FP precision"),
+ cl::init(false));
+ CGBINDOPT(EnableUnsafeFPMath);
+
+ static cl::opt<bool> EnableNoInfsFPMath(
+ "enable-no-infs-fp-math",
+ cl::desc("Enable FP math optimizations that assume no +-Infs"),
+ cl::init(false));
+ CGBINDOPT(EnableNoInfsFPMath);
+
+ static cl::opt<bool> EnableNoNaNsFPMath(
+ "enable-no-nans-fp-math",
+ cl::desc("Enable FP math optimizations that assume no NaNs"),
+ cl::init(false));
+ CGBINDOPT(EnableNoNaNsFPMath);
+
+ 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));
+ CGBINDOPT(EnableNoSignedZerosFPMath);
+
+ 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));
+ CGBINDOPT(EnableNoTrappingFPMath);
+
+ static cl::opt<FPDenormal::DenormalMode> DenormalFPMath(
+ "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")));
+ CGBINDOPT(DenormalFPMath);
+
+ 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));
+ CGBINDOPT(EnableHonorSignDependentRoundingFPMath);
+
+ static cl::opt<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)")));
+ CGBINDOPT(FloatABIForCalls);
+
+ static cl::opt<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.")));
+ CGBINDOPT(FuseFPOps);
+
+ static cl::opt<bool> DontPlaceZerosInBSS(
+ "nozero-initialized-in-bss",
+ cl::desc("Don't place zero-initialized symbols into bss section"),
+ cl::init(false));
+ CGBINDOPT(DontPlaceZerosInBSS);
+
+ static cl::opt<bool> EnableGuaranteedTailCallOpt(
+ "tailcallopt",
+ cl::desc(
+ "Turn fastcc calls into tail calls by (potentially) changing ABI."),
+ cl::init(false));
+ CGBINDOPT(EnableGuaranteedTailCallOpt);
+
+ static cl::opt<bool> DisableTailCalls(
+ "disable-tail-calls", cl::desc("Never emit tail calls"), cl::init(false));
+ CGBINDOPT(DisableTailCalls);
+
+ static cl::opt<bool> StackSymbolOrdering(
+ "stack-symbol-ordering", cl::desc("Order local stack symbols."),
+ cl::init(true));
+ CGBINDOPT(StackSymbolOrdering);
+
+ static cl::opt<unsigned> OverrideStackAlignment(
+ "stack-alignment", cl::desc("Override default stack alignment"),
+ cl::init(0));
+ CGBINDOPT(OverrideStackAlignment);
+
+ static cl::opt<bool> StackRealign(
+ "stackrealign",
+ cl::desc("Force align the stack to the minimum alignment"),
+ cl::init(false));
+ CGBINDOPT(StackRealign);
+
+ 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(""));
+ CGBINDOPT(TrapFuncName);
+
+ static cl::opt<bool> UseCtors("use-ctors",
+ cl::desc("Use .ctors instead of .init_array."),
+ cl::init(false));
+ CGBINDOPT(UseCtors);
+
+ static cl::opt<bool> RelaxELFRelocations(
+ "relax-elf-relocations",
+ cl::desc(
+ "Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF"),
+ cl::init(false));
+ CGBINDOPT(RelaxELFRelocations);
+
+ static cl::opt<bool> DataSections(
+ "data-sections", cl::desc("Emit data into separate sections"),
+ cl::init(false));
+ CGBINDOPT(DataSections);
+
+ static cl::opt<bool> FunctionSections(
+ "function-sections", cl::desc("Emit functions into separate sections"),
+ cl::init(false));
+ CGBINDOPT(FunctionSections);
+
+ static cl::opt<std::string> BBSections(
+ "basicblock-sections",
+ cl::desc("Emit basic blocks into separate sections"),
+ cl::value_desc("all | <function list (file)> | labels | none"),
+ cl::init("none"));
+ CGBINDOPT(BBSections);
+
+ static cl::opt<unsigned> TLSSize(
+ "tls-size", cl::desc("Bit size of immediate TLS offsets"), cl::init(0));
+ CGBINDOPT(TLSSize);
+
+ static cl::opt<bool> EmulatedTLS(
+ "emulated-tls", cl::desc("Use emulated TLS model"), cl::init(false));
+ CGBINDOPT(EmulatedTLS);
+
+ static cl::opt<bool> UniqueSectionNames(
+ "unique-section-names", cl::desc("Give unique names to every section"),
+ cl::init(true));
+ CGBINDOPT(UniqueSectionNames);
+
+ static cl::opt<bool> UniqueBBSectionNames(
+ "unique-bb-section-names",
+ cl::desc("Give unique names to every basic block section"),
+ cl::init(false));
+ CGBINDOPT(UniqueBBSectionNames);
+
+ static cl::opt<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")));
+ CGBINDOPT(EABIVersion);
+
+ 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)")));
+ CGBINDOPT(DebuggerTuningOpt);
+
+ static cl::opt<bool> EnableStackSizeSection(
+ "stack-size-section",
+ cl::desc("Emit a section containing stack size metadata"),
+ cl::init(false));
+ CGBINDOPT(EnableStackSizeSection);
+
+ static cl::opt<bool> EnableAddrsig(
+ "addrsig", cl::desc("Emit an address-significance table"),
+ cl::init(false));
+ CGBINDOPT(EnableAddrsig);
+
+ static cl::opt<bool> EmitCallSiteInfo(
+ "emit-call-site-info",
+ cl::desc(
+ "Emit call site debug information, if debug information is enabled."),
+ cl::init(false));
+ CGBINDOPT(EmitCallSiteInfo);
+
+ static cl::opt<bool> EnableDebugEntryValues(
+ "debug-entry-values",
+ cl::desc("Emit debug info about parameter's entry values"),
+ cl::init(false));
+ CGBINDOPT(EnableDebugEntryValues);
+
+ static cl::opt<bool> ForceDwarfFrameSection(
+ "force-dwarf-frame-section",
+ cl::desc("Always emit a debug frame section."), cl::init(false));
+ CGBINDOPT(ForceDwarfFrameSection);
+
+#undef CGBINDOPT
+
+ mc::RegisterMCTargetOptionsFlags();
+}
+
+llvm::BasicBlockSection
+codegen::getBBSectionsMode(llvm::TargetOptions &Options) {
+ if (getBBSections() == "all")
+ return BasicBlockSection::All;
+ else if (getBBSections() == "labels")
+ return BasicBlockSection::Labels;
+ else if (getBBSections() == "none")
+ return BasicBlockSection::None;
+ else {
+ ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr =
+ MemoryBuffer::getFile(getBBSections());
+ if (!MBOrErr) {
+ errs() << "Error loading basic block sections function list file: "
+ << MBOrErr.getError().message() << "\n";
+ } else {
+ Options.BBSectionsFuncListBuf = std::move(*MBOrErr);
+ }
+ return BasicBlockSection::List;
+ }
+}
+
+// Common utility function tightly tied to the options listed here. Initializes
+// a TargetOptions object with CodeGen flags and returns it.
+TargetOptions codegen::InitTargetOptionsFromCodeGenFlags() {
+ TargetOptions Options;
+ Options.AllowFPOpFusion = getFuseFPOps();
+ Options.UnsafeFPMath = getEnableUnsafeFPMath();
+ Options.NoInfsFPMath = getEnableNoInfsFPMath();
+ Options.NoNaNsFPMath = getEnableNoNaNsFPMath();
+ Options.NoSignedZerosFPMath = getEnableNoSignedZerosFPMath();
+ Options.NoTrappingFPMath = getEnableNoTrappingFPMath();
+ Options.FPDenormalMode = getDenormalFPMath();
+ Options.HonorSignDependentRoundingFPMathOption =
+ getEnableHonorSignDependentRoundingFPMath();
+ if (getFloatABIForCalls() != FloatABI::Default)
+ Options.FloatABIType = getFloatABIForCalls();
+ Options.NoZerosInBSS = getDontPlaceZerosInBSS();
+ Options.GuaranteedTailCallOpt = getEnableGuaranteedTailCallOpt();
+ Options.StackAlignmentOverride = getOverrideStackAlignment();
+ Options.StackSymbolOrdering = getStackSymbolOrdering();
+ Options.UseInitArray = !getUseCtors();
+ Options.RelaxELFRelocations = getRelaxELFRelocations();
+ Options.DataSections = getDataSections();
+ Options.FunctionSections = getFunctionSections();
+ Options.BBSections = getBBSectionsMode(Options);
+ Options.UniqueSectionNames = getUniqueSectionNames();
+ Options.UniqueBBSectionNames = getUniqueBBSectionNames();
+ Options.TLSSize = getTLSSize();
+ Options.EmulatedTLS = getEmulatedTLS();
+ Options.ExplicitEmulatedTLS = EmulatedTLSView->getNumOccurrences() > 0;
+ Options.ExceptionModel = getExceptionModel();
+ Options.EmitStackSizeSection = getEnableStackSizeSection();
+ Options.EmitAddrsig = getEnableAddrsig();
+ Options.EmitCallSiteInfo = getEmitCallSiteInfo();
+ Options.EnableDebugEntryValues = getEnableDebugEntryValues();
+ Options.ForceDwarfFrameSection = getForceDwarfFrameSection();
+
+ Options.MCOptions = mc::InitMCTargetOptionsFromFlags();
+
+ Options.ThreadModel = getThreadModel();
+ Options.EABIVersion = getEABIVersion();
+ Options.DebuggerTuning = getDebuggerTuningOpt();
+
+ return Options;
+}
+
+std::string codegen::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 (getMCPU() == "native")
+ return std::string(sys::getHostCPUName());
+
+ return getMCPU();
+}
+
+std::string codegen::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 (getMCPU() == "native") {
+ StringMap<bool> HostFeatures;
+ if (sys::getHostCPUFeatures(HostFeatures))
+ for (auto &F : HostFeatures)
+ Features.AddFeature(F.first(), F.second);
+ }
+
+ for (auto const &MAttr : getMAttrs())
+ Features.AddFeature(MAttr);
+
+ return Features.getString();
+}
+
+std::vector<std::string> codegen::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 (getMCPU() == "native") {
+ StringMap<bool> HostFeatures;
+ if (sys::getHostCPUFeatures(HostFeatures))
+ for (auto &F : HostFeatures)
+ Features.AddFeature(F.first(), F.second);
+ }
+
+ for (auto const &MAttr : getMAttrs())
+ Features.AddFeature(MAttr);
+
+ return Features.getFeatures();
+}
+
+void codegen::renderBoolStringAttr(AttrBuilder &B, StringRef Name, bool Val) {
+ B.addAttribute(Name, Val ? "true" : "false");
+}
+
+#define HANDLE_BOOL_ATTR(CL, AttrName) \
+ do { \
+ if (CL->getNumOccurrences() > 0 && !F.hasFnAttribute(AttrName)) \
+ renderBoolStringAttr(NewAttrs, AttrName, *CL); \
+ } while (0)
+
+/// Set function attributes of function \p F based on CPU, Features, and command
+/// line flags.
+void codegen::setFunctionAttributes(StringRef CPU, StringRef Features,
+ Function &F) {
+ auto &Ctx = F.getContext();
+ AttributeList Attrs = F.getAttributes();
+ AttrBuilder NewAttrs;
+
+ if (!CPU.empty() && !F.hasFnAttribute("target-cpu"))
+ NewAttrs.addAttribute("target-cpu", CPU);
+ if (!Features.empty()) {
+ // Append the command line features to any that are already on the function.
+ StringRef OldFeatures =
+ F.getFnAttribute("target-features").getValueAsString();
+ if (OldFeatures.empty())
+ NewAttrs.addAttribute("target-features", Features);
+ else {
+ SmallString<256> Appended(OldFeatures);
+ Appended.push_back(',');
+ Appended.append(Features);
+ NewAttrs.addAttribute("target-features", Appended);
+ }
+ }
+ if (FramePointerUsageView->getNumOccurrences() > 0 &&
+ !F.hasFnAttribute("frame-pointer")) {
+ if (getFramePointerUsage() == FramePointer::All)
+ NewAttrs.addAttribute("frame-pointer", "all");
+ else if (getFramePointerUsage() == FramePointer::NonLeaf)
+ NewAttrs.addAttribute("frame-pointer", "non-leaf");
+ else if (getFramePointerUsage() == FramePointer::None)
+ NewAttrs.addAttribute("frame-pointer", "none");
+ }
+ if (DisableTailCallsView->getNumOccurrences() > 0)
+ NewAttrs.addAttribute("disable-tail-calls",
+ toStringRef(getDisableTailCalls()));
+ if (getStackRealign())
+ NewAttrs.addAttribute("stackrealign");
+
+ HANDLE_BOOL_ATTR(EnableUnsafeFPMathView, "unsafe-fp-math");
+ HANDLE_BOOL_ATTR(EnableNoInfsFPMathView, "no-infs-fp-math");
+ HANDLE_BOOL_ATTR(EnableNoNaNsFPMathView, "no-nans-fp-math");
+ HANDLE_BOOL_ATTR(EnableNoSignedZerosFPMathView, "no-signed-zeros-fp-math");
+
+ if (TrapFuncNameView->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(
+ AttributeList::FunctionIndex,
+ Attribute::get(Ctx, "trap-func-name", getTrapFuncName()));
+
+ // Let NewAttrs override Attrs.
+ F.setAttributes(
+ Attrs.addAttributes(Ctx, AttributeList::FunctionIndex, NewAttrs));
+}
+
+/// Set function attributes of functions in Module M based on CPU,
+/// Features, and command line flags.
+void codegen::setFunctionAttributes(StringRef CPU, StringRef Features,
+ Module &M) {
+ for (Function &F : M)
+ setFunctionAttributes(CPU, Features, F);
+}