LangOptions.def

//===--- LangOptions.def - Language option database -------------*- 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 defines the language options. Users of this file must
// define the LANGOPT macro to make use of this information. The arguments to
// the macro are:
//   LANGOPT(Name, Bits, DefaultValue, Description)
// Note that the DefaultValue must be a constant value (literal or enumeration);
// it cannot depend on the value of another language option.
//
// Optionally, the user may also define:
//
// BENIGN_LANGOPT: for options that don't affect the construction of the AST in
//     any way (that is, the value can be different between an implicit module
//     and the user of that module).
//
// COMPATIBLE_LANGOPT: for options that affect the construction of the AST in
//     a way that doesn't prevent interoperability (that is, the value can be
//     different between an explicit module and the user of that module).
//
// ENUM_LANGOPT: for options that have enumeration, rather than unsigned, type.
//
// VALUE_LANGOPT: for options that describe a value rather than a flag.
//
// BENIGN_ENUM_LANGOPT, COMPATIBLE_ENUM_LANGOPT,
// BENIGN_VALUE_LANGOPT, COMPATIBLE_VALUE_LANGOPT: combinations of the above.
//
// FIXME: Clients should be able to more easily select whether they want
// different levels of compatibility versus how to handle different kinds
// of option.
//
// The Description field should be a noun phrase, for instance "frobbing all
// widgets" or "C's implicit blintz feature".
//===----------------------------------------------------------------------===//

#ifndef LANGOPT
#  error Define the LANGOPT macro to handle language options
#endif

#ifndef COMPATIBLE_LANGOPT
#  define COMPATIBLE_LANGOPT(Name, Bits, Default, Description) \
     LANGOPT(Name, Bits, Default, Description)
#endif

#ifndef BENIGN_LANGOPT
#  define BENIGN_LANGOPT(Name, Bits, Default, Description) \
     COMPATIBLE_LANGOPT(Name, Bits, Default, Description)
#endif

#ifndef ENUM_LANGOPT
#  define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
     LANGOPT(Name, Bits, Default, Description)
#endif

#ifndef COMPATIBLE_ENUM_LANGOPT
#  define COMPATIBLE_ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
     ENUM_LANGOPT(Name, Type, Bits, Default, Description)
#endif

#ifndef BENIGN_ENUM_LANGOPT
#  define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
     COMPATIBLE_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
#endif

#ifndef VALUE_LANGOPT
#  define VALUE_LANGOPT(Name, Bits, Default, Description) \
     LANGOPT(Name, Bits, Default, Description)
#endif

#ifndef COMPATIBLE_VALUE_LANGOPT
#  define COMPATIBLE_VALUE_LANGOPT(Name, Bits, Default, Description) \
     VALUE_LANGOPT(Name, Bits, Default, Description)
#endif

#ifndef BENIGN_VALUE_LANGOPT
#  define BENIGN_VALUE_LANGOPT(Name, Bits, Default, Description) \
     COMPATIBLE_VALUE_LANGOPT(Name, Bits, Default, Description)
#endif

// FIXME: A lot of the BENIGN_ options should be COMPATIBLE_ instead.
LANGOPT(C99               , 1, 0, "C99")
LANGOPT(C11               , 1, 0, "C11")
LANGOPT(C17               , 1, 0, "C17")
LANGOPT(C2x               , 1, 0, "C2x")
LANGOPT(MSVCCompat        , 1, 0, "Microsoft Visual C++ full compatibility mode")
LANGOPT(Kernel            , 1, 0, "Kernel mode")
LANGOPT(MicrosoftExt      , 1, 0, "Microsoft C++ extensions")
LANGOPT(AsmBlocks         , 1, 0, "Microsoft inline asm blocks")
LANGOPT(Borland           , 1, 0, "Borland extensions")
LANGOPT(CPlusPlus         , 1, 0, "C++")
LANGOPT(CPlusPlus11       , 1, 0, "C++11")
LANGOPT(CPlusPlus14       , 1, 0, "C++14")
LANGOPT(CPlusPlus17       , 1, 0, "C++17")
LANGOPT(CPlusPlus20       , 1, 0, "C++20")
LANGOPT(CPlusPlus2b       , 1, 0, "C++2b")
LANGOPT(ObjC              , 1, 0, "Objective-C")
BENIGN_LANGOPT(ObjCDefaultSynthProperties , 1, 0,
               "Objective-C auto-synthesized properties")
BENIGN_LANGOPT(EncodeExtendedBlockSig , 1, 0,
               "Encoding extended block type signature")
BENIGN_LANGOPT(EncodeCXXClassTemplateSpec , 1, 0,
               "Fully encode c++ class template specialization")
BENIGN_LANGOPT(ObjCInferRelatedResultType , 1, 1,
               "Objective-C related result type inference")
LANGOPT(AppExt , 1, 0, "Objective-C App Extension")
LANGOPT(Trigraphs         , 1, 0,"trigraphs")
LANGOPT(LineComment       , 1, 0, "'//' comments")
LANGOPT(Bool              , 1, 0, "bool, true, and false keywords")
LANGOPT(Half              , 1, 0, "half keyword")
LANGOPT(WChar             , 1, 0, "wchar_t keyword")
LANGOPT(Char8             , 1, 0, "char8_t keyword")
LANGOPT(IEEE128           , 1, 0, "__ieee128 keyword")
LANGOPT(DeclSpecKeyword   , 1, 0, "__declspec keyword")
BENIGN_LANGOPT(DollarIdents   , 1, 1, "'$' in identifiers")
BENIGN_LANGOPT(AsmPreprocessor, 1, 0, "preprocessor in asm mode")
LANGOPT(GNUMode           , 1, 1, "GNU extensions")
LANGOPT(GNUKeywords       , 1, 1, "GNU keywords")
VALUE_LANGOPT(GNUCVersion , 32, 0, "GNU C compatibility version")
LANGOPT(DisableKNRFunctions, 1, 0, "require function types to have a prototype")
LANGOPT(Digraphs          , 1, 0, "digraphs")
BENIGN_LANGOPT(HexFloats  , 1, 0, "C99 hexadecimal float constants")
LANGOPT(CXXOperatorNames  , 1, 0, "C++ operator name keywords")
LANGOPT(AppleKext         , 1, 0, "Apple kext support")
BENIGN_LANGOPT(PascalStrings, 1, 0, "Pascal string support")
LANGOPT(WritableStrings   , 1, 0, "writable string support")
LANGOPT(ConstStrings      , 1, 0, "const-qualified string support")
ENUM_LANGOPT(LaxVectorConversions, LaxVectorConversionKind, 2,
             LaxVectorConversionKind::All, "lax vector conversions")
ENUM_LANGOPT(AltivecSrcCompat, AltivecSrcCompatKind, 2,
             AltivecSrcCompatKind::Default, "Altivec source compatibility")
LANGOPT(ConvergentFunctions, 1, 1, "Assume convergent functions")
LANGOPT(AltiVec           , 1, 0, "AltiVec-style vector initializers")
LANGOPT(ZVector           , 1, 0, "System z vector extensions")
LANGOPT(Exceptions        , 1, 0, "exception handling")
LANGOPT(ObjCExceptions    , 1, 0, "Objective-C exceptions")
LANGOPT(CXXExceptions     , 1, 0, "C++ exceptions")
LANGOPT(EHAsynch          , 1, 0, "C/C++ EH Asynch exceptions")
ENUM_LANGOPT(ExceptionHandling, ExceptionHandlingKind, 3,
             ExceptionHandlingKind::None, "exception handling")
LANGOPT(IgnoreExceptions  , 1, 0, "ignore exceptions")
LANGOPT(ExternCNoUnwind   , 1, 0, "Assume extern C functions don't unwind")
LANGOPT(TraditionalCPP    , 1, 0, "traditional CPP emulation")
LANGOPT(RTTI              , 1, 1, "run-time type information")
LANGOPT(RTTIData          , 1, 1, "emit run-time type information data")
LANGOPT(MSBitfields       , 1, 0, "Microsoft-compatible structure layout")
LANGOPT(MSVolatile        , 1, 0, "Microsoft-compatible volatile loads and stores")
LANGOPT(Freestanding, 1, 0, "freestanding implementation")
LANGOPT(NoBuiltin         , 1, 0, "disable builtin functions")
LANGOPT(NoMathBuiltin     , 1, 0, "disable math builtin functions")
LANGOPT(GNUAsm            , 1, 1, "GNU-style inline assembly")
LANGOPT(Coroutines        , 1, 0, "C++20 coroutines")
LANGOPT(CoroAlignedAllocation, 1, 0, "prefer Aligned Allocation according to P2014 Option 2")
LANGOPT(DllExportInlines  , 1, 1, "dllexported classes dllexport inline methods")
LANGOPT(RelaxedTemplateTemplateArgs, 1, 0, "C++17 relaxed matching of template template arguments")
LANGOPT(PointerAuthIntrinsics, 1, 0, "pointer authentication intrinsics")
LANGOPT(PointerAuthCalls  , 1, 0, "function pointer authentication")
LANGOPT(PointerAuthReturns, 1, 0, "return pointer authentication")
LANGOPT(PointerAuthIndirectGotos, 1, 0, "indirect gotos pointer authentication")
LANGOPT(PointerAuthAuthTraps, 1, 0, "pointer authentication failure traps")
LANGOPT(SoftPointerAuth   , 1, 0, "software emulation of pointer authentication")
VALUE_LANGOPT(PointerAuthABIVersion, 32, 0, "pointer authentication ABI version")
LANGOPT(PointerAuthKernelABIVersion, 1, 0, "controls whether the pointer auth abi version represents a kernel ABI")
LANGOPT(PointerAuthABIVersionEncoded, 1, 0, "controls whether the pointer auth abi version should be encoded in the IR")

LANGOPT(Unstable          , 1, 0, "Enable unstable and experimental features")
LANGOPT(ExperimentalLibrary, 1, 0, "enable unstable and experimental library features")

LANGOPT(DoubleSquareBracketAttributes, 1, 0, "'[[]]' attributes extension for all language standard modes")

COMPATIBLE_LANGOPT(RecoveryAST, 1, 1, "Preserve expressions in AST when encountering errors")
COMPATIBLE_LANGOPT(RecoveryASTType, 1, 1, "Preserve the type in recovery expressions")

BENIGN_LANGOPT(ThreadsafeStatics , 1, 1, "thread-safe static initializers")
LANGOPT(POSIXThreads      , 1, 0, "POSIX thread support")
LANGOPT(Blocks            , 1, 0, "blocks extension to C")
BENIGN_LANGOPT(EmitAllDecls      , 1, 0, "emitting all declarations")
LANGOPT(MathErrno         , 1, 1, "errno in math functions")
BENIGN_LANGOPT(HeinousExtensions , 1, 0, "extensions that we really don't like and may be ripped out at any time")
LANGOPT(Modules           , 1, 0, "modules semantics")
COMPATIBLE_LANGOPT(ModulesTS  , 1, 0, "C++ Modules TS syntax")
COMPATIBLE_LANGOPT(CPlusPlusModules, 1, 0, "C++ modules syntax")
LANGOPT(BuiltinHeadersInSystemModules, 1, 0, "builtin headers belong to system modules, and _Builtin_ modules are ignored for cstdlib headers")
BENIGN_ENUM_LANGOPT(CompilingModule, CompilingModuleKind, 3, CMK_None,
                    "compiling a module interface")
BENIGN_LANGOPT(CompilingPCH, 1, 0, "building a pch")
BENIGN_LANGOPT(BuildingPCHWithObjectFile, 1, 0, "building a pch which has a corresponding object file")
BENIGN_LANGOPT(CacheGeneratedPCH, 1, 0, "cache generated PCH files in memory")
BENIGN_LANGOPT(PCHInstantiateTemplates, 1, 0, "instantiate templates while building a PCH")
COMPATIBLE_LANGOPT(ModulesDeclUse    , 1, 0, "require declaration of module uses")
BENIGN_LANGOPT(ModulesSearchAll  , 1, 1, "searching even non-imported modules to find unresolved references")
COMPATIBLE_LANGOPT(ModulesStrictDeclUse, 1, 0, "requiring declaration of module uses and all headers to be in modules")
COMPATIBLE_LANGOPT(ModulesValidateTextualHeaderIncludes, 1, 1, "validation of textual header includes")
BENIGN_LANGOPT(ModulesErrorRecovery, 1, 1, "automatically importing modules as needed when performing error recovery")
BENIGN_LANGOPT(ImplicitModules, 1, 1, "building modules that are not specified via -fmodule-file")
COMPATIBLE_LANGOPT(ModulesLocalVisibility, 1, 0, "local submodule visibility")
COMPATIBLE_LANGOPT(ModulesHashErrorDiags, 1, 0, "hash out diagnostic errors as part of the module hash")
COMPATIBLE_LANGOPT(Optimize          , 1, 0, "__OPTIMIZE__ predefined macro")
COMPATIBLE_LANGOPT(OptimizeSize      , 1, 0, "__OPTIMIZE_SIZE__ predefined macro")
COMPATIBLE_LANGOPT(Static            , 1, 0, "__STATIC__ predefined macro (as opposed to __DYNAMIC__)")
VALUE_LANGOPT(PackStruct  , 32, 0,
              "default struct packing maximum alignment")
VALUE_LANGOPT(MaxTypeAlign  , 32, 0,
              "default maximum alignment for types")
VALUE_LANGOPT(AlignDouble            , 1, 0, "Controls if doubles should be aligned to 8 bytes (x86 only)")
VALUE_LANGOPT(DoubleSize            , 32, 0, "width of double")
VALUE_LANGOPT(LongDoubleSize        , 32, 0, "width of long double")
LANGOPT(PPCIEEELongDouble            , 1, 0, "use IEEE 754 quadruple-precision for long double")
LANGOPT(EnableAIXExtendedAltivecABI  , 1, 0, "__EXTABI__  predefined macro")
LANGOPT(EnableAIXQuadwordAtomicsABI  , 1, 0, "Use 16-byte atomic lock free semantics")
COMPATIBLE_VALUE_LANGOPT(PICLevel    , 2, 0, "__PIC__ level")
COMPATIBLE_VALUE_LANGOPT(PIE         , 1, 0, "is pie")
LANGOPT(ROPI                         , 1, 0, "Read-only position independence")
LANGOPT(RWPI                         , 1, 0, "Read-write position independence")
COMPATIBLE_LANGOPT(GNUInline         , 1, 0, "GNU inline semantics")
COMPATIBLE_LANGOPT(NoInlineDefine    , 1, 0, "__NO_INLINE__ predefined macro")
COMPATIBLE_LANGOPT(Deprecated        , 1, 0, "__DEPRECATED predefined macro")
COMPATIBLE_LANGOPT(FastMath          , 1, 0, "fast FP math optimizations, and __FAST_MATH__ predefined macro")
COMPATIBLE_LANGOPT(FiniteMathOnly    , 1, 0, "__FINITE_MATH_ONLY__ predefined macro")
COMPATIBLE_LANGOPT(UnsafeFPMath      , 1, 0, "Unsafe Floating Point Math")
COMPATIBLE_LANGOPT(ProtectParens     , 1, 0, "optimizer honors parentheses "
                   "when floating-point expressions are evaluated")
BENIGN_LANGOPT(AllowFPReassoc    , 1, 0, "Permit Floating Point reassociation")
BENIGN_LANGOPT(NoHonorNaNs       , 1, 0, "Permit Floating Point optimization without regard to NaN")
BENIGN_LANGOPT(NoHonorInfs       , 1, 0, "Permit Floating Point optimization without regard to infinities")
BENIGN_LANGOPT(NoSignedZero      , 1, 0, "Permit Floating Point optimization without regard to signed zeros")
BENIGN_LANGOPT(AllowRecip        , 1, 0, "Permit Floating Point reciprocal")
BENIGN_LANGOPT(ApproxFunc        , 1, 0, "Permit Floating Point approximation")

BENIGN_LANGOPT(ObjCGCBitmapPrint , 1, 0, "printing of GC's bitmap layout for __weak/__strong ivars")

BENIGN_LANGOPT(AccessControl     , 1, 1, "C++ access control")
LANGOPT(CharIsSigned      , 1, 1, "signed char")
LANGOPT(WCharSize         , 4, 0, "width of wchar_t")
LANGOPT(WCharIsSigned        , 1, 0, "signed or unsigned wchar_t")
ENUM_LANGOPT(MSPointerToMemberRepresentationMethod, PragmaMSPointersToMembersKind, 2, PPTMK_BestCase, "member-pointer representation method")
ENUM_LANGOPT(DefaultCallingConv, DefaultCallingConvention, 3, DCC_None, "default calling convention")

LANGOPT(ShortEnums        , 1, 0, "short enum types")

LANGOPT(OpenCL            , 1, 0, "OpenCL")
LANGOPT(OpenCLVersion     , 32, 0, "OpenCL C version")
LANGOPT(OpenCLCPlusPlus   , 1, 0, "C++ for OpenCL")
LANGOPT(OpenCLCPlusPlusVersion     , 32, 0, "C++ for OpenCL version")
LANGOPT(OpenCLGenericAddressSpace, 1, 0, "OpenCL generic keyword")
LANGOPT(OpenCLPipes              , 1, 0, "OpenCL pipes language constructs and built-ins")
LANGOPT(NativeHalfType    , 1, 0, "Native half type support")
LANGOPT(NativeHalfArgsAndReturns, 1, 0, "Native half args and returns")
LANGOPT(CUDA              , 1, 0, "CUDA")
LANGOPT(HIP               , 1, 0, "HIP")
LANGOPT(OpenMP            , 32, 0, "OpenMP support and version of OpenMP (31, 40 or 45)")
LANGOPT(OpenMPExtensions  , 1, 1, "Enable all Clang extensions for OpenMP directives and clauses")
LANGOPT(OpenMPSimd        , 1, 0, "Use SIMD only OpenMP support.")
LANGOPT(OpenMPUseTLS      , 1, 0, "Use TLS for threadprivates or runtime calls")
LANGOPT(OpenMPIsDevice    , 1, 0, "Generate code only for OpenMP target device")
LANGOPT(OpenMPCUDAMode    , 1, 0, "Generate code for OpenMP pragmas in SIMT/SPMD mode")
LANGOPT(OpenMPIRBuilder   , 1, 0, "Use the experimental OpenMP-IR-Builder codegen path.")
LANGOPT(OpenMPCUDANumSMs  , 32, 0, "Number of SMs for CUDA devices.")
LANGOPT(OpenMPCUDABlocksPerSM  , 32, 0, "Number of blocks per SM for CUDA devices.")
LANGOPT(OpenMPCUDAReductionBufNum , 32, 1024, "Number of the reduction records in the intermediate reduction buffer used for the teams reductions.")
LANGOPT(OpenMPTargetDebug , 32, 0, "Enable debugging in the OpenMP offloading device RTL")
LANGOPT(OpenMPOptimisticCollapse  , 1, 0, "Use at most 32 bits to represent the collapsed loop nest counter.")
LANGOPT(OpenMPThreadSubscription  , 1, 0, "Assume work-shared loops do not have more iterations than participating threads.")
LANGOPT(OpenMPTeamSubscription  , 1, 0, "Assume distributed loops do not have more iterations than participating teams.")
LANGOPT(OpenMPNoThreadState  , 1, 0, "Assume that no thread in a parallel region will modify an ICV.")
LANGOPT(OpenMPNoNestedParallelism  , 1, 0, "Assume that no thread in a parallel region will encounter a parallel region")
LANGOPT(OpenMPOffloadMandatory  , 1, 0, "Assert that offloading is mandatory and do not create a host fallback.")
LANGOPT(NoGPULib  , 1, 0, "Indicate a build without the standard GPU libraries.")
LANGOPT(RenderScript      , 1, 0, "RenderScript")

LANGOPT(HLSL, 1, 0, "HLSL")
ENUM_LANGOPT(HLSLVersion, HLSLLangStd, 16, HLSL_Unset, "HLSL Version")

LANGOPT(CUDAIsDevice      , 1, 0, "compiling for CUDA device")
LANGOPT(CUDAAllowVariadicFunctions, 1, 0, "allowing variadic functions in CUDA device code")
LANGOPT(CUDAHostDeviceConstexpr, 1, 1, "treating unattributed constexpr functions as __host__ __device__")
LANGOPT(CUDADeviceApproxTranscendentals, 1, 0, "using approximate transcendental functions")
LANGOPT(GPURelocatableDeviceCode, 1, 0, "generate relocatable device code")
LANGOPT(GPUAllowDeviceInit, 1, 0, "allowing device side global init functions for HIP")
LANGOPT(GPUMaxThreadsPerBlock, 32, 1024, "default max threads per block for kernel launch bounds for HIP")
LANGOPT(GPUDeferDiag, 1, 0, "defer host/device related diagnostic messages for CUDA/HIP")
LANGOPT(GPUExcludeWrongSideOverloads, 1, 0, "always exclude wrong side overloads in overloading resolution for CUDA/HIP")
LANGOPT(OffloadingNewDriver, 1, 0, "use the new driver for generating offloading code.")

LANGOPT(SYCLIsDevice      , 1, 0, "Generate code for SYCL device")
LANGOPT(SYCLIsHost        , 1, 0, "SYCL host compilation")
ENUM_LANGOPT(SYCLVersion  , SYCLMajorVersion, 2, SYCL_None, "Version of the SYCL standard used")

LANGOPT(HIPUseNewLaunchAPI, 1, 0, "Use new kernel launching API for HIP")

LANGOPT(SizedDeallocation , 1, 0, "sized deallocation")
LANGOPT(AlignedAllocation , 1, 0, "aligned allocation")
LANGOPT(AlignedAllocationUnavailable, 1, 0, "aligned allocation functions are unavailable")
LANGOPT(NewAlignOverride  , 32, 0, "maximum alignment guaranteed by '::operator new(size_t)'")
BENIGN_LANGOPT(ModulesCodegen , 1, 0, "Modules code generation")
BENIGN_LANGOPT(ModulesDebugInfo , 1, 0, "Modules debug info")
BENIGN_LANGOPT(ElideConstructors , 1, 1, "C++ copy constructor elision")
BENIGN_LANGOPT(DumpRecordLayouts , 1, 0, "dumping the layout of IRgen'd records")
BENIGN_LANGOPT(DumpRecordLayoutsSimple , 1, 0, "dumping the layout of IRgen'd records in a simple form")
BENIGN_LANGOPT(DumpRecordLayoutsCanonical , 1, 0, "dumping the AST layout of records using canonical field types")
BENIGN_LANGOPT(DumpRecordLayoutsComplete , 1, 0, "dumping the AST layout of all complete records")
BENIGN_LANGOPT(DumpVTableLayouts , 1, 0, "dumping the layouts of emitted vtables")
LANGOPT(NoConstantCFStrings , 1, 0, "no constant CoreFoundation strings")
BENIGN_LANGOPT(InlineVisibilityHidden , 1, 0, "hidden visibility for inline C++ methods")
BENIGN_ENUM_LANGOPT(DefaultVisibilityExportMapping, DefaultVisiblityExportMapping, 2, DefaultVisiblityExportMapping::None, "controls mapping of default visibility to dllexport")
BENIGN_LANGOPT(IgnoreXCOFFVisibility, 1, 0, "All the visibility attributes that are specified in the source code are ignored in aix XCOFF.")
BENIGN_LANGOPT(VisibilityInlinesHiddenStaticLocalVar, 1, 0,
               "hidden visibility for static local variables in inline C++ "
               "methods when -fvisibility-inlines hidden is enabled")
LANGOPT(GlobalAllocationFunctionVisibilityHidden , 1, 0, "hidden visibility for global operator new and delete declaration")
LANGOPT(NewInfallible , 1, 0, "Treats throwing global C++ operator new as always returning valid memory (annotates with __attribute__((returns_nonnull)) and throw()). This is detectable in source.")
BENIGN_LANGOPT(ParseUnknownAnytype, 1, 0, "__unknown_anytype")
BENIGN_LANGOPT(DebuggerSupport , 1, 0, "debugger support")
BENIGN_LANGOPT(DebuggerCastResultToId, 1, 0, "for 'po' in the debugger, cast the result to id if it is of unknown type")
BENIGN_LANGOPT(DebuggerObjCLiteral , 1, 0, "debugger Objective-C literals and subscripting support")

BENIGN_LANGOPT(SpellChecking , 1, 1, "spell-checking")
LANGOPT(SinglePrecisionConstants , 1, 0, "treating double-precision floating point constants as single precision constants")
LANGOPT(FastRelaxedMath , 1, 0, "OpenCL fast relaxed math")
BENIGN_LANGOPT(CLNoSignedZero , 1, 0, "Permit Floating Point optimization without regard to signed zeros")
COMPATIBLE_LANGOPT(CLUnsafeMath , 1, 0, "Unsafe Floating Point Math")
COMPATIBLE_LANGOPT(CLFiniteMathOnly , 1, 0, "__FINITE_MATH_ONLY__ predefined macro")
/// FP_CONTRACT mode (on/off/fast).
BENIGN_ENUM_LANGOPT(DefaultFPContractMode, FPModeKind, 2, FPM_Off, "FP contraction type")
COMPATIBLE_LANGOPT(ExpStrictFP, 1, false, "Enable experimental strict floating point")
BENIGN_LANGOPT(RoundingMath, 1, false, "Do not assume default floating-point rounding behavior")
BENIGN_ENUM_LANGOPT(FPExceptionMode, FPExceptionModeKind, 2, FPE_Default, "FP Exception Behavior Mode type")
BENIGN_ENUM_LANGOPT(FPEvalMethod, FPEvalMethodKind, 2, FEM_UnsetOnCommandLine, "FP type used for floating point arithmetic")
LANGOPT(NoBitFieldTypeAlign , 1, 0, "bit-field type alignment")
LANGOPT(HexagonQdsp6Compat , 1, 0, "hexagon-qdsp6 backward compatibility")
LANGOPT(ObjCAutoRefCount , 1, 0, "Objective-C automated reference counting")
LANGOPT(ObjCWeakRuntime     , 1, 0, "__weak support in the ARC runtime")
LANGOPT(ObjCWeak            , 1, 0, "Objective-C __weak in ARC and MRC files")
LANGOPT(ObjCSubscriptingLegacyRuntime         , 1, 0, "Subscripting support in legacy ObjectiveC runtime")
BENIGN_LANGOPT(CompatibilityQualifiedIdBlockParamTypeChecking, 1, 0,
               "compatibility mode for type checking block parameters "
               "involving qualified id types")
LANGOPT(ObjCDisableDirectMethodsForTesting, 1, 0,
        "Disable recognition of objc_direct methods")
LANGOPT(CFProtectionBranch , 1, 0, "Control-Flow Branch Protection enabled")
LANGOPT(FakeAddressSpaceMap , 1, 0, "OpenCL fake address space map")
ENUM_LANGOPT(AddressSpaceMapMangling , AddrSpaceMapMangling, 2, ASMM_Target, "OpenCL address space map mangling mode")
LANGOPT(IncludeDefaultHeader, 1, 0, "Include default header file for OpenCL")
LANGOPT(DeclareOpenCLBuiltins, 1, 0, "Declare OpenCL builtin functions")
BENIGN_LANGOPT(DelayedTemplateParsing , 1, 0, "delayed template parsing")
LANGOPT(BlocksRuntimeOptional , 1, 0, "optional blocks runtime")
LANGOPT(
    CompleteMemberPointers, 1, 0,
    "Require member pointer base types to be complete at the point where the "
    "type's inheritance model would be determined under the Microsoft ABI")

ENUM_LANGOPT(GC, GCMode, 2, NonGC, "Objective-C Garbage Collection mode")
ENUM_LANGOPT(ValueVisibilityMode, Visibility, 3, DefaultVisibility,
             "default visibility for functions and variables [-fvisibility]")
ENUM_LANGOPT(TypeVisibilityMode, Visibility, 3, DefaultVisibility,
             "default visibility for types [-ftype-visibility]")
LANGOPT(SetVisibilityForExternDecls, 1, 0,
        "apply global symbol visibility to external declarations without an explicit visibility")
LANGOPT(VisibilityFromDLLStorageClass, 1, 0,
        "set the visiblity of globals from their DLL storage class [-fvisibility-from-dllstorageclass]")
ENUM_LANGOPT(DLLExportVisibility, Visibility, 3, DefaultVisibility,
             "visibility for functions and variables with dllexport annotations [-fvisibility-from-dllstorageclass]")
ENUM_LANGOPT(NoDLLStorageClassVisibility, Visibility, 3, HiddenVisibility,
             "visibility for functions and variables without an explicit DLL storage class [-fvisibility-from-dllstorageclass]")
ENUM_LANGOPT(ExternDeclDLLImportVisibility, Visibility, 3, DefaultVisibility,
             "visibility for external declarations with dllimport annotations [-fvisibility-from-dllstorageclass]")
ENUM_LANGOPT(ExternDeclNoDLLStorageClassVisibility, Visibility, 3, HiddenVisibility,
             "visibility for external declarations without an explicit DLL storage class [-fvisibility-from-dllstorageclass]")
BENIGN_LANGOPT(SemanticInterposition        , 1, 0, "semantic interposition")
BENIGN_LANGOPT(HalfNoSemanticInterposition, 1, 0,
               "Like -fno-semantic-interposition but don't use local aliases")
ENUM_LANGOPT(StackProtector, StackProtectorMode, 2, SSPOff,
             "stack protector mode")
ENUM_LANGOPT(TrivialAutoVarInit, TrivialAutoVarInitKind, 2, TrivialAutoVarInitKind::Uninitialized,
             "trivial automatic variable initialization")
VALUE_LANGOPT(TrivialAutoVarInitStopAfter, 32, 0,
             "stop trivial automatic variable initialization after the specified number of instances. Must be greater than 0.")
ENUM_LANGOPT(SignedOverflowBehavior, SignedOverflowBehaviorTy, 2, SOB_Undefined,
             "signed integer overflow handling")
ENUM_LANGOPT(ThreadModel  , ThreadModelKind, 2, ThreadModelKind::POSIX, "Thread Model")

BENIGN_LANGOPT(ArrowDepth, 32, 256,
               "maximum number of operator->s to follow")
BENIGN_LANGOPT(InstantiationDepth, 32, 1024,
               "maximum template instantiation depth")
BENIGN_LANGOPT(ConstexprCallDepth, 32, 512,
               "maximum constexpr call depth")
BENIGN_LANGOPT(ConstexprStepLimit, 32, 1048576,
               "maximum constexpr evaluation steps")
BENIGN_LANGOPT(EnableNewConstInterp, 1, 0,
               "enable the experimental new constant interpreter")
BENIGN_LANGOPT(BracketDepth, 32, 256,
               "maximum bracket nesting depth")
BENIGN_LANGOPT(NumLargeByValueCopy, 32, 0,
        "if non-zero, warn about parameter or return Warn if parameter/return value is larger in bytes than this setting. 0 is no check.")
VALUE_LANGOPT(MSCompatibilityVersion, 32, 0, "Microsoft Visual C/C++ Version")
ENUM_LANGOPT(VtorDispMode, MSVtorDispMode, 2, MSVtorDispMode::ForVBaseOverride,
             "How many vtordisps to insert")

LANGOPT(ApplePragmaPack, 1, 0, "Apple gcc-compatible #pragma pack handling")

LANGOPT(XLPragmaPack, 1, 0, "IBM XL #pragma pack handling")

LANGOPT(RetainCommentsFromSystemHeaders, 1, 0, "retain documentation comments from system headers in the AST")
LANGOPT(APINotes, 1, 0, "use external API notes")
LANGOPT(APINotesModules, 1, 0, "use external API notes")
LANGOPT(NeededByPCHOrCompilationUsesPCH, 1, 0, "compilation involves pch")

LANGOPT(SanitizeAddressFieldPadding, 2, 0, "controls how aggressive is ASan "
                                           "field padding (0: none, 1:least "
                                           "aggressive, 2: more aggressive)")

LANGOPT(Cmse, 1, 0, "ARM Security extensions support")

LANGOPT(XRayInstrument, 1, 0, "controls whether to do XRay instrumentation")
LANGOPT(XRayAlwaysEmitCustomEvents, 1, 0,
        "controls whether to always emit intrinsic calls to "
        "__xray_customevent(...) builtin.")
LANGOPT(XRayAlwaysEmitTypedEvents, 1, 0,
        "controls whether to always emit intrinsic calls to "
        "__xray_typedevent(...) builtin.")

LANGOPT(ForceEmitVTables, 1, 0, "whether to emit all vtables")

BENIGN_LANGOPT(AllowEditorPlaceholders, 1, 0,
               "allow editor placeholders in source")

ENUM_LANGOPT(ClangABICompat, ClangABI, 4, ClangABI::Latest,
             "version of Clang that we should attempt to be ABI-compatible "
             "with")

COMPATIBLE_VALUE_LANGOPT(FunctionAlignment, 5, 0, "Default alignment for functions")
COMPATIBLE_VALUE_LANGOPT(LoopAlignment, 32, 0, "Default alignment for loops")

LANGOPT(FixedPoint, 1, 0, "fixed point types")
LANGOPT(PaddingOnUnsignedFixedPoint, 1, 0,
        "unsigned fixed point types having one extra padding bit")

LANGOPT(RegisterStaticDestructors, 1, 1, "Register C++ static destructors")

LANGOPT(MatrixTypes, 1, 0, "Enable or disable the builtin matrix type")

ENUM_LANGOPT(StrictFlexArraysLevel, StrictFlexArraysLevelKind, 2,
             StrictFlexArraysLevelKind::Default,
             "Rely on strict definition of flexible arrays")

COMPATIBLE_VALUE_LANGOPT(MaxTokens, 32, 0, "Max number of tokens per TU or 0")

ENUM_LANGOPT(SignReturnAddressScope, SignReturnAddressScopeKind, 2, SignReturnAddressScopeKind::None,
             "Scope of return address signing")
ENUM_LANGOPT(SignReturnAddressKey, SignReturnAddressKeyKind, 1, SignReturnAddressKeyKind::AKey,
             "Key used for return address signing")
LANGOPT(BranchTargetEnforcement, 1, 0, "Branch-target enforcement enabled")

LANGOPT(SpeculativeLoadHardening, 1, 0, "Speculative load hardening enabled")

LANGOPT(RelativeCXXABIVTables, 1, 0,
        "Use an ABI-incompatible v-table layout that uses relative references")

LANGOPT(VScaleMin, 32, 0, "Minimum vscale value")
LANGOPT(VScaleMax, 32, 0, "Maximum vscale value")

ENUM_LANGOPT(ExtendIntArgs, ExtendArgsKind, 1, ExtendArgsKind::ExtendTo32,
             "Controls how scalar integer arguments are extended in calls "
             "to unprototyped and varargs functions")

VALUE_LANGOPT(FuchsiaAPILevel, 32, 0, "Fuchsia API level")

// This option will be removed in the future once the backend
// supports all operations (like division or float-to-integer conversion)
// on large _BitInts.
BENIGN_VALUE_LANGOPT(MaxBitIntWidth, 32, 128, "Maximum width of a _BitInt")

LANGOPT(IgnoreConflictingTypes, 1, 0, "Suppress conflicting type errors from mismatching declarations")

#undef LANGOPT
#undef COMPATIBLE_LANGOPT
#undef BENIGN_LANGOPT
#undef ENUM_LANGOPT
#undef COMPATIBLE_ENUM_LANGOPT
#undef BENIGN_ENUM_LANGOPT
#undef VALUE_LANGOPT
#undef COMPATIBLE_VALUE_LANGOPT
#undef BENIGN_VALUE_LANGOPT