diff options
Diffstat (limited to 'contrib/llvm-project/clang/lib/Frontend/InitPreprocessor.cpp')
| -rw-r--r-- | contrib/llvm-project/clang/lib/Frontend/InitPreprocessor.cpp | 1347 |
1 files changed, 1347 insertions, 0 deletions
diff --git a/contrib/llvm-project/clang/lib/Frontend/InitPreprocessor.cpp b/contrib/llvm-project/clang/lib/Frontend/InitPreprocessor.cpp new file mode 100644 index 000000000000..e259ab47c558 --- /dev/null +++ b/contrib/llvm-project/clang/lib/Frontend/InitPreprocessor.cpp @@ -0,0 +1,1347 @@ +//===--- InitPreprocessor.cpp - PP initialization code. ---------*- 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 implements the clang::InitializePreprocessor function. +// +//===----------------------------------------------------------------------===// + +#include "clang/Basic/FileManager.h" +#include "clang/Basic/MacroBuilder.h" +#include "clang/Basic/SourceManager.h" +#include "clang/Basic/SyncScope.h" +#include "clang/Basic/TargetInfo.h" +#include "clang/Basic/Version.h" +#include "clang/Frontend/FrontendDiagnostic.h" +#include "clang/Frontend/FrontendOptions.h" +#include "clang/Frontend/Utils.h" +#include "clang/Lex/HeaderSearch.h" +#include "clang/Lex/Preprocessor.h" +#include "clang/Lex/PreprocessorOptions.h" +#include "clang/Serialization/ASTReader.h" +#include "llvm/ADT/APFloat.h" +#include "llvm/IR/DataLayout.h" +#include "llvm/IR/DerivedTypes.h" +using namespace clang; + +static bool MacroBodyEndsInBackslash(StringRef MacroBody) { + while (!MacroBody.empty() && isWhitespace(MacroBody.back())) + MacroBody = MacroBody.drop_back(); + return !MacroBody.empty() && MacroBody.back() == '\\'; +} + +// Append a #define line to Buf for Macro. Macro should be of the form XXX, +// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit +// "#define XXX Y z W". To get a #define with no value, use "XXX=". +static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro, + DiagnosticsEngine &Diags) { + std::pair<StringRef, StringRef> MacroPair = Macro.split('='); + StringRef MacroName = MacroPair.first; + StringRef MacroBody = MacroPair.second; + if (MacroName.size() != Macro.size()) { + // Per GCC -D semantics, the macro ends at \n if it exists. + StringRef::size_type End = MacroBody.find_first_of("\n\r"); + if (End != StringRef::npos) + Diags.Report(diag::warn_fe_macro_contains_embedded_newline) + << MacroName; + MacroBody = MacroBody.substr(0, End); + // We handle macro bodies which end in a backslash by appending an extra + // backslash+newline. This makes sure we don't accidentally treat the + // backslash as a line continuation marker. + if (MacroBodyEndsInBackslash(MacroBody)) + Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n"); + else + Builder.defineMacro(MacroName, MacroBody); + } else { + // Push "macroname 1". + Builder.defineMacro(Macro); + } +} + +/// AddImplicitInclude - Add an implicit \#include of the specified file to the +/// predefines buffer. +/// As these includes are generated by -include arguments the header search +/// logic is going to search relatively to the current working directory. +static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) { + Builder.append(Twine("#include \"") + File + "\""); +} + +static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) { + Builder.append(Twine("#__include_macros \"") + File + "\""); + // Marker token to stop the __include_macros fetch loop. + Builder.append("##"); // ##? +} + +/// Add an implicit \#include using the original file used to generate +/// a PCH file. +static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP, + const PCHContainerReader &PCHContainerRdr, + StringRef ImplicitIncludePCH) { + std::string OriginalFile = ASTReader::getOriginalSourceFile( + std::string(ImplicitIncludePCH), PP.getFileManager(), PCHContainerRdr, + PP.getDiagnostics()); + if (OriginalFile.empty()) + return; + + AddImplicitInclude(Builder, OriginalFile); +} + +/// PickFP - This is used to pick a value based on the FP semantics of the +/// specified FP model. +template <typename T> +static T PickFP(const llvm::fltSemantics *Sem, T IEEEHalfVal, T IEEESingleVal, + T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, + T IEEEQuadVal) { + if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEhalf()) + return IEEEHalfVal; + if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle()) + return IEEESingleVal; + if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble()) + return IEEEDoubleVal; + if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended()) + return X87DoubleExtendedVal; + if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble()) + return PPCDoubleDoubleVal; + assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad()); + return IEEEQuadVal; +} + +static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, + const llvm::fltSemantics *Sem, StringRef Ext) { + const char *DenormMin, *Epsilon, *Max, *Min; + DenormMin = PickFP(Sem, "5.9604644775390625e-8", "1.40129846e-45", + "4.9406564584124654e-324", "3.64519953188247460253e-4951", + "4.94065645841246544176568792868221e-324", + "6.47517511943802511092443895822764655e-4966"); + int Digits = PickFP(Sem, 3, 6, 15, 18, 31, 33); + int DecimalDigits = PickFP(Sem, 5, 9, 17, 21, 33, 36); + Epsilon = PickFP(Sem, "9.765625e-4", "1.19209290e-7", + "2.2204460492503131e-16", "1.08420217248550443401e-19", + "4.94065645841246544176568792868221e-324", + "1.92592994438723585305597794258492732e-34"); + int MantissaDigits = PickFP(Sem, 11, 24, 53, 64, 106, 113); + int Min10Exp = PickFP(Sem, -4, -37, -307, -4931, -291, -4931); + int Max10Exp = PickFP(Sem, 4, 38, 308, 4932, 308, 4932); + int MinExp = PickFP(Sem, -13, -125, -1021, -16381, -968, -16381); + int MaxExp = PickFP(Sem, 16, 128, 1024, 16384, 1024, 16384); + Min = PickFP(Sem, "6.103515625e-5", "1.17549435e-38", "2.2250738585072014e-308", + "3.36210314311209350626e-4932", + "2.00416836000897277799610805135016e-292", + "3.36210314311209350626267781732175260e-4932"); + Max = PickFP(Sem, "6.5504e+4", "3.40282347e+38", "1.7976931348623157e+308", + "1.18973149535723176502e+4932", + "1.79769313486231580793728971405301e+308", + "1.18973149535723176508575932662800702e+4932"); + + SmallString<32> DefPrefix; + DefPrefix = "__"; + DefPrefix += Prefix; + DefPrefix += "_"; + + Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext); + Builder.defineMacro(DefPrefix + "HAS_DENORM__"); + Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits)); + Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits)); + Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext); + Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); + Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); + Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits)); + + Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp)); + Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp)); + Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext); + + Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")"); + Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")"); + Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext); +} + + +/// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro +/// named MacroName with the max value for a type with width 'TypeWidth' a +/// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). +static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth, + StringRef ValSuffix, bool isSigned, + MacroBuilder &Builder) { + llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth) + : llvm::APInt::getMaxValue(TypeWidth); + Builder.defineMacro(MacroName, toString(MaxVal, 10, isSigned) + ValSuffix); +} + +/// DefineTypeSize - An overloaded helper that uses TargetInfo to determine +/// the width, suffix, and signedness of the given type +static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty, + const TargetInfo &TI, MacroBuilder &Builder) { + DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), + TI.isTypeSigned(Ty), Builder); +} + +static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty, + const TargetInfo &TI, MacroBuilder &Builder) { + bool IsSigned = TI.isTypeSigned(Ty); + StringRef FmtModifier = TI.getTypeFormatModifier(Ty); + for (const char *Fmt = IsSigned ? "di" : "ouxX"; *Fmt; ++Fmt) { + Builder.defineMacro(Prefix + "_FMT" + Twine(*Fmt) + "__", + Twine("\"") + FmtModifier + Twine(*Fmt) + "\""); + } +} + +static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, + MacroBuilder &Builder) { + Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); +} + +static void DefineTypeWidth(const Twine &MacroName, TargetInfo::IntType Ty, + const TargetInfo &TI, MacroBuilder &Builder) { + Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty))); +} + +static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth, + const TargetInfo &TI, MacroBuilder &Builder) { + Builder.defineMacro(MacroName, + Twine(BitWidth / TI.getCharWidth())); +} + +// This will generate a macro based on the prefix with `_MAX__` as the suffix +// for the max value representable for the type, and a macro with a `_WIDTH__` +// suffix for the width of the type. +static void DefineTypeSizeAndWidth(const Twine &Prefix, TargetInfo::IntType Ty, + const TargetInfo &TI, + MacroBuilder &Builder) { + DefineTypeSize(Prefix + "_MAX__", Ty, TI, Builder); + DefineTypeWidth(Prefix + "_WIDTH__", Ty, TI, Builder); +} + +static void DefineExactWidthIntType(TargetInfo::IntType Ty, + const TargetInfo &TI, + MacroBuilder &Builder) { + int TypeWidth = TI.getTypeWidth(Ty); + bool IsSigned = TI.isTypeSigned(Ty); + + // Use the target specified int64 type, when appropriate, so that [u]int64_t + // ends up being defined in terms of the correct type. + if (TypeWidth == 64) + Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); + + // Use the target specified int16 type when appropriate. Some MCU targets + // (such as AVR) have definition of [u]int16_t to [un]signed int. + if (TypeWidth == 16) + Ty = IsSigned ? TI.getInt16Type() : TI.getUInt16Type(); + + const char *Prefix = IsSigned ? "__INT" : "__UINT"; + + DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); + DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); + + StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty)); + Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix); +} + +static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty, + const TargetInfo &TI, + MacroBuilder &Builder) { + int TypeWidth = TI.getTypeWidth(Ty); + bool IsSigned = TI.isTypeSigned(Ty); + + // Use the target specified int64 type, when appropriate, so that [u]int64_t + // ends up being defined in terms of the correct type. + if (TypeWidth == 64) + Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); + + // We don't need to define a _WIDTH macro for the exact-width types because + // we already know the width. + const char *Prefix = IsSigned ? "__INT" : "__UINT"; + DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); +} + +static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned, + const TargetInfo &TI, + MacroBuilder &Builder) { + TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); + if (Ty == TargetInfo::NoInt) + return; + + const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST"; + DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); + // We only want the *_WIDTH macro for the signed types to avoid too many + // predefined macros (the unsigned width and the signed width are identical.) + if (IsSigned) + DefineTypeSizeAndWidth(Prefix + Twine(TypeWidth), Ty, TI, Builder); + else + DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); + DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); +} + +static void DefineFastIntType(unsigned TypeWidth, bool IsSigned, + const TargetInfo &TI, MacroBuilder &Builder) { + // stdint.h currently defines the fast int types as equivalent to the least + // types. + TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); + if (Ty == TargetInfo::NoInt) + return; + + const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST"; + DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); + // We only want the *_WIDTH macro for the signed types to avoid too many + // predefined macros (the unsigned width and the signed width are identical.) + if (IsSigned) + DefineTypeSizeAndWidth(Prefix + Twine(TypeWidth), Ty, TI, Builder); + else + DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); + DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); +} + + +/// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with +/// the specified properties. +static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign, + unsigned InlineWidth) { + // Fully-aligned, power-of-2 sizes no larger than the inline + // width will be inlined as lock-free operations. + if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 && + TypeWidth <= InlineWidth) + return "2"; // "always lock free" + // We cannot be certain what operations the lib calls might be + // able to implement as lock-free on future processors. + return "1"; // "sometimes lock free" +} + +/// Add definitions required for a smooth interaction between +/// Objective-C++ automated reference counting and libstdc++ (4.2). +static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts, + MacroBuilder &Builder) { + Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR"); + + std::string Result; + { + // Provide specializations for the __is_scalar type trait so that + // lifetime-qualified objects are not considered "scalar" types, which + // libstdc++ uses as an indicator of the presence of trivial copy, assign, + // default-construct, and destruct semantics (none of which hold for + // lifetime-qualified objects in ARC). + llvm::raw_string_ostream Out(Result); + + Out << "namespace std {\n" + << "\n" + << "struct __true_type;\n" + << "struct __false_type;\n" + << "\n"; + + Out << "template<typename _Tp> struct __is_scalar;\n" + << "\n"; + + if (LangOpts.ObjCAutoRefCount) { + Out << "template<typename _Tp>\n" + << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n" + << " enum { __value = 0 };\n" + << " typedef __false_type __type;\n" + << "};\n" + << "\n"; + } + + if (LangOpts.ObjCWeak) { + Out << "template<typename _Tp>\n" + << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n" + << " enum { __value = 0 };\n" + << " typedef __false_type __type;\n" + << "};\n" + << "\n"; + } + + if (LangOpts.ObjCAutoRefCount) { + Out << "template<typename _Tp>\n" + << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))" + << " _Tp> {\n" + << " enum { __value = 0 };\n" + << " typedef __false_type __type;\n" + << "};\n" + << "\n"; + } + + Out << "}\n"; + } + Builder.append(Result); +} + +static void InitializeStandardPredefinedMacros(const TargetInfo &TI, + const LangOptions &LangOpts, + const FrontendOptions &FEOpts, + MacroBuilder &Builder) { + // C++ [cpp.predefined]p1: + // The following macro names shall be defined by the implementation: + + // -- __STDC__ + // [C++] Whether __STDC__ is predefined and if so, what its value is, + // are implementation-defined. + // (Removed in C++20.) + if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP) + Builder.defineMacro("__STDC__"); + // -- __STDC_HOSTED__ + // The integer literal 1 if the implementation is a hosted + // implementation or the integer literal 0 if it is not. + if (LangOpts.Freestanding) + Builder.defineMacro("__STDC_HOSTED__", "0"); + else + Builder.defineMacro("__STDC_HOSTED__"); + + // -- __STDC_VERSION__ + // [C++] Whether __STDC_VERSION__ is predefined and if so, what its + // value is, are implementation-defined. + // (Removed in C++20.) + if (!LangOpts.CPlusPlus) { + // FIXME: Use correct value for C23. + if (LangOpts.C2x) + Builder.defineMacro("__STDC_VERSION__", "202000L"); + else if (LangOpts.C17) + Builder.defineMacro("__STDC_VERSION__", "201710L"); + else if (LangOpts.C11) + Builder.defineMacro("__STDC_VERSION__", "201112L"); + else if (LangOpts.C99) + Builder.defineMacro("__STDC_VERSION__", "199901L"); + else if (!LangOpts.GNUMode && LangOpts.Digraphs) + Builder.defineMacro("__STDC_VERSION__", "199409L"); + } else { + // -- __cplusplus + // FIXME: Use correct value for C++23. + if (LangOpts.CPlusPlus2b) + Builder.defineMacro("__cplusplus", "202101L"); + // [C++20] The integer literal 202002L. + else if (LangOpts.CPlusPlus20) + Builder.defineMacro("__cplusplus", "202002L"); + // [C++17] The integer literal 201703L. + else if (LangOpts.CPlusPlus17) + Builder.defineMacro("__cplusplus", "201703L"); + // [C++14] The name __cplusplus is defined to the value 201402L when + // compiling a C++ translation unit. + else if (LangOpts.CPlusPlus14) + Builder.defineMacro("__cplusplus", "201402L"); + // [C++11] The name __cplusplus is defined to the value 201103L when + // compiling a C++ translation unit. + else if (LangOpts.CPlusPlus11) + Builder.defineMacro("__cplusplus", "201103L"); + // [C++03] The name __cplusplus is defined to the value 199711L when + // compiling a C++ translation unit. + else + Builder.defineMacro("__cplusplus", "199711L"); + + // -- __STDCPP_DEFAULT_NEW_ALIGNMENT__ + // [C++17] An integer literal of type std::size_t whose value is the + // alignment guaranteed by a call to operator new(std::size_t) + // + // We provide this in all language modes, since it seems generally useful. + Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__", + Twine(TI.getNewAlign() / TI.getCharWidth()) + + TI.getTypeConstantSuffix(TI.getSizeType())); + + // -- __STDCPP_THREADS__ + // Defined, and has the value integer literal 1, if and only if a + // program can have more than one thread of execution. + if (LangOpts.getThreadModel() == LangOptions::ThreadModelKind::POSIX) + Builder.defineMacro("__STDCPP_THREADS__", "1"); + } + + // In C11 these are environment macros. In C++11 they are only defined + // as part of <cuchar>. To prevent breakage when mixing C and C++ + // code, define these macros unconditionally. We can define them + // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit + // and 32-bit character literals. + Builder.defineMacro("__STDC_UTF_16__", "1"); + Builder.defineMacro("__STDC_UTF_32__", "1"); + + if (LangOpts.ObjC) + Builder.defineMacro("__OBJC__"); + + // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros. + if (LangOpts.OpenCL) { + if (LangOpts.CPlusPlus) { + switch (LangOpts.OpenCLCPlusPlusVersion) { + case 100: + Builder.defineMacro("__OPENCL_CPP_VERSION__", "100"); + break; + case 202100: + Builder.defineMacro("__OPENCL_CPP_VERSION__", "202100"); + break; + default: + llvm_unreachable("Unsupported C++ version for OpenCL"); + } + Builder.defineMacro("__CL_CPP_VERSION_1_0__", "100"); + Builder.defineMacro("__CL_CPP_VERSION_2021__", "202100"); + } else { + // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the + // language standard with which the program is compiled. __OPENCL_VERSION__ + // is for the OpenCL version supported by the OpenCL device, which is not + // necessarily the language standard with which the program is compiled. + // A shared OpenCL header file requires a macro to indicate the language + // standard. As a workaround, __OPENCL_C_VERSION__ is defined for + // OpenCL v1.0 and v1.1. + switch (LangOpts.OpenCLVersion) { + case 100: + Builder.defineMacro("__OPENCL_C_VERSION__", "100"); + break; + case 110: + Builder.defineMacro("__OPENCL_C_VERSION__", "110"); + break; + case 120: + Builder.defineMacro("__OPENCL_C_VERSION__", "120"); + break; + case 200: + Builder.defineMacro("__OPENCL_C_VERSION__", "200"); + break; + case 300: + Builder.defineMacro("__OPENCL_C_VERSION__", "300"); + break; + default: + llvm_unreachable("Unsupported OpenCL version"); + } + } + Builder.defineMacro("CL_VERSION_1_0", "100"); + Builder.defineMacro("CL_VERSION_1_1", "110"); + Builder.defineMacro("CL_VERSION_1_2", "120"); + Builder.defineMacro("CL_VERSION_2_0", "200"); + Builder.defineMacro("CL_VERSION_3_0", "300"); + + if (TI.isLittleEndian()) + Builder.defineMacro("__ENDIAN_LITTLE__"); + + if (LangOpts.FastRelaxedMath) + Builder.defineMacro("__FAST_RELAXED_MATH__"); + } + + if (LangOpts.SYCLIsDevice || LangOpts.SYCLIsHost) { + // SYCL Version is set to a value when building SYCL applications + if (LangOpts.getSYCLVersion() == LangOptions::SYCL_2017) + Builder.defineMacro("CL_SYCL_LANGUAGE_VERSION", "121"); + else if (LangOpts.getSYCLVersion() == LangOptions::SYCL_2020) + Builder.defineMacro("SYCL_LANGUAGE_VERSION", "202001"); + } + + // Not "standard" per se, but available even with the -undef flag. + if (LangOpts.AsmPreprocessor) + Builder.defineMacro("__ASSEMBLER__"); + if (LangOpts.CUDA) { + if (LangOpts.GPURelocatableDeviceCode) + Builder.defineMacro("__CLANG_RDC__"); + if (!LangOpts.HIP) + Builder.defineMacro("__CUDA__"); + } + if (LangOpts.HIP) { + Builder.defineMacro("__HIP__"); + Builder.defineMacro("__HIPCC__"); + Builder.defineMacro("__HIP_MEMORY_SCOPE_SINGLETHREAD", "1"); + Builder.defineMacro("__HIP_MEMORY_SCOPE_WAVEFRONT", "2"); + Builder.defineMacro("__HIP_MEMORY_SCOPE_WORKGROUP", "3"); + Builder.defineMacro("__HIP_MEMORY_SCOPE_AGENT", "4"); + Builder.defineMacro("__HIP_MEMORY_SCOPE_SYSTEM", "5"); + if (LangOpts.CUDAIsDevice) + Builder.defineMacro("__HIP_DEVICE_COMPILE__"); + } +} + +/// Initialize the predefined C++ language feature test macros defined in +/// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". +static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, + MacroBuilder &Builder) { + // C++98 features. + if (LangOpts.RTTI) + Builder.defineMacro("__cpp_rtti", "199711L"); + if (LangOpts.CXXExceptions) + Builder.defineMacro("__cpp_exceptions", "199711L"); + + // C++11 features. + if (LangOpts.CPlusPlus11) { + Builder.defineMacro("__cpp_unicode_characters", "200704L"); + Builder.defineMacro("__cpp_raw_strings", "200710L"); + Builder.defineMacro("__cpp_unicode_literals", "200710L"); + Builder.defineMacro("__cpp_user_defined_literals", "200809L"); + Builder.defineMacro("__cpp_lambdas", "200907L"); + Builder.defineMacro("__cpp_constexpr", + LangOpts.CPlusPlus20 ? "201907L" : + LangOpts.CPlusPlus17 ? "201603L" : + LangOpts.CPlusPlus14 ? "201304L" : "200704"); + Builder.defineMacro("__cpp_constexpr_in_decltype", "201711L"); + Builder.defineMacro("__cpp_range_based_for", + LangOpts.CPlusPlus17 ? "201603L" : "200907"); + Builder.defineMacro("__cpp_static_assert", + LangOpts.CPlusPlus17 ? "201411L" : "200410"); + Builder.defineMacro("__cpp_decltype", "200707L"); + Builder.defineMacro("__cpp_attributes", "200809L"); + Builder.defineMacro("__cpp_rvalue_references", "200610L"); + Builder.defineMacro("__cpp_variadic_templates", "200704L"); + Builder.defineMacro("__cpp_initializer_lists", "200806L"); + Builder.defineMacro("__cpp_delegating_constructors", "200604L"); + Builder.defineMacro("__cpp_nsdmi", "200809L"); + Builder.defineMacro("__cpp_inheriting_constructors", "201511L"); + Builder.defineMacro("__cpp_ref_qualifiers", "200710L"); + Builder.defineMacro("__cpp_alias_templates", "200704L"); + } + if (LangOpts.ThreadsafeStatics) + Builder.defineMacro("__cpp_threadsafe_static_init", "200806L"); + + // C++14 features. + if (LangOpts.CPlusPlus14) { + Builder.defineMacro("__cpp_binary_literals", "201304L"); + Builder.defineMacro("__cpp_digit_separators", "201309L"); + Builder.defineMacro("__cpp_init_captures", + LangOpts.CPlusPlus20 ? "201803L" : "201304L"); + Builder.defineMacro("__cpp_generic_lambdas", + LangOpts.CPlusPlus20 ? "201707L" : "201304L"); + Builder.defineMacro("__cpp_decltype_auto", "201304L"); + Builder.defineMacro("__cpp_return_type_deduction", "201304L"); + Builder.defineMacro("__cpp_aggregate_nsdmi", "201304L"); + Builder.defineMacro("__cpp_variable_templates", "201304L"); + } + if (LangOpts.SizedDeallocation) + Builder.defineMacro("__cpp_sized_deallocation", "201309L"); + + // C++17 features. + if (LangOpts.CPlusPlus17) { + Builder.defineMacro("__cpp_hex_float", "201603L"); + Builder.defineMacro("__cpp_inline_variables", "201606L"); + Builder.defineMacro("__cpp_noexcept_function_type", "201510L"); + Builder.defineMacro("__cpp_capture_star_this", "201603L"); + Builder.defineMacro("__cpp_if_constexpr", "201606L"); + Builder.defineMacro("__cpp_deduction_guides", "201703L"); // (not latest) + Builder.defineMacro("__cpp_template_auto", "201606L"); // (old name) + Builder.defineMacro("__cpp_namespace_attributes", "201411L"); + Builder.defineMacro("__cpp_enumerator_attributes", "201411L"); + Builder.defineMacro("__cpp_nested_namespace_definitions", "201411L"); + Builder.defineMacro("__cpp_variadic_using", "201611L"); + Builder.defineMacro("__cpp_aggregate_bases", "201603L"); + Builder.defineMacro("__cpp_structured_bindings", "201606L"); + Builder.defineMacro("__cpp_nontype_template_args", + "201411L"); // (not latest) + Builder.defineMacro("__cpp_fold_expressions", "201603L"); + Builder.defineMacro("__cpp_guaranteed_copy_elision", "201606L"); + Builder.defineMacro("__cpp_nontype_template_parameter_auto", "201606L"); + } + if (LangOpts.AlignedAllocation && !LangOpts.AlignedAllocationUnavailable) + Builder.defineMacro("__cpp_aligned_new", "201606L"); + if (LangOpts.RelaxedTemplateTemplateArgs) + Builder.defineMacro("__cpp_template_template_args", "201611L"); + + // C++20 features. + if (LangOpts.CPlusPlus20) { + //Builder.defineMacro("__cpp_aggregate_paren_init", "201902L"); + Builder.defineMacro("__cpp_concepts", "201907L"); + Builder.defineMacro("__cpp_conditional_explicit", "201806L"); + //Builder.defineMacro("__cpp_consteval", "201811L"); + Builder.defineMacro("__cpp_constexpr_dynamic_alloc", "201907L"); + Builder.defineMacro("__cpp_constinit", "201907L"); + Builder.defineMacro("__cpp_impl_coroutine", "201902L"); + Builder.defineMacro("__cpp_designated_initializers", "201707L"); + Builder.defineMacro("__cpp_impl_three_way_comparison", "201907L"); + //Builder.defineMacro("__cpp_modules", "201907L"); + Builder.defineMacro("__cpp_using_enum", "201907L"); + } + // C++2b features. + if (LangOpts.CPlusPlus2b) { + Builder.defineMacro("__cpp_implicit_move", "202011L"); + Builder.defineMacro("__cpp_size_t_suffix", "202011L"); + Builder.defineMacro("__cpp_if_consteval", "202106L"); + } + if (LangOpts.Char8) + Builder.defineMacro("__cpp_char8_t", "201811L"); + Builder.defineMacro("__cpp_impl_destroying_delete", "201806L"); + + // TS features. + if (LangOpts.Coroutines) + Builder.defineMacro("__cpp_coroutines", "201703L"); +} + +/// InitializeOpenCLFeatureTestMacros - Define OpenCL macros based on target +/// settings and language version +void InitializeOpenCLFeatureTestMacros(const TargetInfo &TI, + const LangOptions &Opts, + MacroBuilder &Builder) { + const llvm::StringMap<bool> &OpenCLFeaturesMap = TI.getSupportedOpenCLOpts(); + // FIXME: OpenCL options which affect language semantics/syntax + // should be moved into LangOptions. + auto defineOpenCLExtMacro = [&](llvm::StringRef Name, auto... OptArgs) { + // Check if extension is supported by target and is available in this + // OpenCL version + if (TI.hasFeatureEnabled(OpenCLFeaturesMap, Name) && + OpenCLOptions::isOpenCLOptionAvailableIn(Opts, OptArgs...)) + Builder.defineMacro(Name); + }; +#define OPENCL_GENERIC_EXTENSION(Ext, ...) \ + defineOpenCLExtMacro(#Ext, __VA_ARGS__); +#include "clang/Basic/OpenCLExtensions.def" + + // Assume compiling for FULL profile + Builder.defineMacro("__opencl_c_int64"); +} + +static void InitializePredefinedMacros(const TargetInfo &TI, + const LangOptions &LangOpts, + const FrontendOptions &FEOpts, + const PreprocessorOptions &PPOpts, + MacroBuilder &Builder) { + // Compiler version introspection macros. + Builder.defineMacro("__llvm__"); // LLVM Backend + Builder.defineMacro("__clang__"); // Clang Frontend +#define TOSTR2(X) #X +#define TOSTR(X) TOSTR2(X) + Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); + Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); + Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); +#undef TOSTR +#undef TOSTR2 + Builder.defineMacro("__clang_version__", + "\"" CLANG_VERSION_STRING " " + + getClangFullRepositoryVersion() + "\""); + + if (LangOpts.GNUCVersion != 0) { + // Major, minor, patch, are given two decimal places each, so 4.2.1 becomes + // 40201. + unsigned GNUCMajor = LangOpts.GNUCVersion / 100 / 100; + unsigned GNUCMinor = LangOpts.GNUCVersion / 100 % 100; + unsigned GNUCPatch = LangOpts.GNUCVersion % 100; + Builder.defineMacro("__GNUC__", Twine(GNUCMajor)); + Builder.defineMacro("__GNUC_MINOR__", Twine(GNUCMinor)); + Builder.defineMacro("__GNUC_PATCHLEVEL__", Twine(GNUCPatch)); + Builder.defineMacro("__GXX_ABI_VERSION", "1002"); + + if (LangOpts.CPlusPlus) { + Builder.defineMacro("__GNUG__", Twine(GNUCMajor)); + Builder.defineMacro("__GXX_WEAK__"); + } + } + + // Define macros for the C11 / C++11 memory orderings + Builder.defineMacro("__ATOMIC_RELAXED", "0"); + Builder.defineMacro("__ATOMIC_CONSUME", "1"); + Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); + Builder.defineMacro("__ATOMIC_RELEASE", "3"); + Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); + Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); + + // Define macros for the OpenCL memory scope. + // The values should match AtomicScopeOpenCLModel::ID enum. + static_assert( + static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 && + static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 && + static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 && + static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4, + "Invalid OpenCL memory scope enum definition"); + Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0"); + Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1"); + Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2"); + Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3"); + Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4"); + + // Support for #pragma redefine_extname (Sun compatibility) + Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); + + // Previously this macro was set to a string aiming to achieve compatibility + // with GCC 4.2.1. Now, just return the full Clang version + Builder.defineMacro("__VERSION__", "\"" + + Twine(getClangFullCPPVersion()) + "\""); + + // Initialize language-specific preprocessor defines. + + // Standard conforming mode? + if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) + Builder.defineMacro("__STRICT_ANSI__"); + + if (LangOpts.GNUCVersion && LangOpts.CPlusPlus11) + Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); + + if (LangOpts.ObjC) { + if (LangOpts.ObjCRuntime.isNonFragile()) { + Builder.defineMacro("__OBJC2__"); + + if (LangOpts.ObjCExceptions) + Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); + } + + if (LangOpts.getGC() != LangOptions::NonGC) + Builder.defineMacro("__OBJC_GC__"); + + if (LangOpts.ObjCRuntime.isNeXTFamily()) + Builder.defineMacro("__NEXT_RUNTIME__"); + + if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::GNUstep) { + auto version = LangOpts.ObjCRuntime.getVersion(); + std::string versionString = "1"; + // Don't rely on the tuple argument, because we can be asked to target + // later ABIs than we actually support, so clamp these values to those + // currently supported + if (version >= VersionTuple(2, 0)) + Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__", "20"); + else + Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__", + "1" + Twine(std::min(8U, version.getMinor().getValueOr(0)))); + } + + if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { + VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); + + unsigned minor = 0; + if (tuple.getMinor().hasValue()) + minor = tuple.getMinor().getValue(); + + unsigned subminor = 0; + if (tuple.getSubminor().hasValue()) + subminor = tuple.getSubminor().getValue(); + + Builder.defineMacro("__OBJFW_RUNTIME_ABI__", + Twine(tuple.getMajor() * 10000 + minor * 100 + + subminor)); + } + + Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); + Builder.defineMacro("IBOutletCollection(ClassName)", + "__attribute__((iboutletcollection(ClassName)))"); + Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); + Builder.defineMacro("IBInspectable", ""); + Builder.defineMacro("IB_DESIGNABLE", ""); + } + + // Define a macro that describes the Objective-C boolean type even for C + // and C++ since BOOL can be used from non Objective-C code. + Builder.defineMacro("__OBJC_BOOL_IS_BOOL", + Twine(TI.useSignedCharForObjCBool() ? "0" : "1")); + + if (LangOpts.CPlusPlus) + InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); + + // darwin_constant_cfstrings controls this. This is also dependent + // on other things like the runtime I believe. This is set even for C code. + if (!LangOpts.NoConstantCFStrings) + Builder.defineMacro("__CONSTANT_CFSTRINGS__"); + + if (LangOpts.ObjC) + Builder.defineMacro("OBJC_NEW_PROPERTIES"); + + if (LangOpts.PascalStrings) + Builder.defineMacro("__PASCAL_STRINGS__"); + + if (LangOpts.Blocks) { + Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); + Builder.defineMacro("__BLOCKS__"); + } + + if (!LangOpts.MSVCCompat && LangOpts.Exceptions) + Builder.defineMacro("__EXCEPTIONS"); + if (LangOpts.GNUCVersion && LangOpts.RTTI) + Builder.defineMacro("__GXX_RTTI"); + + if (LangOpts.hasSjLjExceptions()) + Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); + else if (LangOpts.hasSEHExceptions()) + Builder.defineMacro("__SEH__"); + else if (LangOpts.hasDWARFExceptions() && + (TI.getTriple().isThumb() || TI.getTriple().isARM())) + Builder.defineMacro("__ARM_DWARF_EH__"); + + if (LangOpts.Deprecated) + Builder.defineMacro("__DEPRECATED"); + + if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) + Builder.defineMacro("__private_extern__", "extern"); + + if (LangOpts.MicrosoftExt) { + if (LangOpts.WChar) { + // wchar_t supported as a keyword. + Builder.defineMacro("_WCHAR_T_DEFINED"); + Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); + } + } + + // Macros to help identify the narrow and wide character sets + // FIXME: clang currently ignores -fexec-charset=. If this changes, + // then this may need to be updated. + Builder.defineMacro("__clang_literal_encoding__", "\"UTF-8\""); + if (TI.getTypeWidth(TI.getWCharType()) >= 32) { + // FIXME: 32-bit wchar_t signals UTF-32. This may change + // if -fwide-exec-charset= is ever supported. + Builder.defineMacro("__clang_wide_literal_encoding__", "\"UTF-32\""); + } else { + // FIXME: Less-than 32-bit wchar_t generally means UTF-16 + // (e.g., Windows, 32-bit IBM). This may need to be + // updated if -fwide-exec-charset= is ever supported. + Builder.defineMacro("__clang_wide_literal_encoding__", "\"UTF-16\""); + } + + if (LangOpts.Optimize) + Builder.defineMacro("__OPTIMIZE__"); + if (LangOpts.OptimizeSize) + Builder.defineMacro("__OPTIMIZE_SIZE__"); + + if (LangOpts.FastMath) + Builder.defineMacro("__FAST_MATH__"); + + // Initialize target-specific preprocessor defines. + + // __BYTE_ORDER__ was added in GCC 4.6. It's analogous + // to the macro __BYTE_ORDER (no trailing underscores) + // from glibc's <endian.h> header. + // We don't support the PDP-11 as a target, but include + // the define so it can still be compared against. + Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); + Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); + Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); + if (TI.isBigEndian()) { + Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); + Builder.defineMacro("__BIG_ENDIAN__"); + } else { + Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); + Builder.defineMacro("__LITTLE_ENDIAN__"); + } + + if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 + && TI.getIntWidth() == 32) { + Builder.defineMacro("_LP64"); + Builder.defineMacro("__LP64__"); + } + + if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 + && TI.getIntWidth() == 32) { + Builder.defineMacro("_ILP32"); + Builder.defineMacro("__ILP32__"); + } + + // Define type sizing macros based on the target properties. + assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); + Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth())); + + Builder.defineMacro("__BOOL_WIDTH__", Twine(TI.getBoolWidth())); + Builder.defineMacro("__SHRT_WIDTH__", Twine(TI.getShortWidth())); + Builder.defineMacro("__INT_WIDTH__", Twine(TI.getIntWidth())); + Builder.defineMacro("__LONG_WIDTH__", Twine(TI.getLongWidth())); + Builder.defineMacro("__LLONG_WIDTH__", Twine(TI.getLongLongWidth())); + + size_t BitIntMaxWidth = TI.getMaxBitIntWidth(); + assert(BitIntMaxWidth <= llvm::IntegerType::MAX_INT_BITS && + "Target defined a max bit width larger than LLVM can support!"); + assert(BitIntMaxWidth >= TI.getLongLongWidth() && + "Target defined a max bit width smaller than the C standard allows!"); + Builder.defineMacro("__BITINT_MAXWIDTH__", Twine(BitIntMaxWidth)); + + DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); + DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); + DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); + DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); + DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); + DefineTypeSizeAndWidth("__WCHAR", TI.getWCharType(), TI, Builder); + DefineTypeSizeAndWidth("__WINT", TI.getWIntType(), TI, Builder); + DefineTypeSizeAndWidth("__INTMAX", TI.getIntMaxType(), TI, Builder); + DefineTypeSizeAndWidth("__SIZE", TI.getSizeType(), TI, Builder); + + DefineTypeSizeAndWidth("__UINTMAX", TI.getUIntMaxType(), TI, Builder); + DefineTypeSizeAndWidth("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); + DefineTypeSizeAndWidth("__INTPTR", TI.getIntPtrType(), TI, Builder); + DefineTypeSizeAndWidth("__UINTPTR", TI.getUIntPtrType(), TI, Builder); + + DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); + DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); + DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); + DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); + DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); + DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); + DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); + DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); + DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", + TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); + DefineTypeSizeof("__SIZEOF_SIZE_T__", + TI.getTypeWidth(TI.getSizeType()), TI, Builder); + DefineTypeSizeof("__SIZEOF_WCHAR_T__", + TI.getTypeWidth(TI.getWCharType()), TI, Builder); + DefineTypeSizeof("__SIZEOF_WINT_T__", + TI.getTypeWidth(TI.getWIntType()), TI, Builder); + if (TI.hasInt128Type()) + DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); + + DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); + DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); + Builder.defineMacro("__INTMAX_C_SUFFIX__", + TI.getTypeConstantSuffix(TI.getIntMaxType())); + DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); + DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); + Builder.defineMacro("__UINTMAX_C_SUFFIX__", + TI.getTypeConstantSuffix(TI.getUIntMaxType())); + DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); + DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); + DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); + DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); + DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); + DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); + DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); + DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); + DefineTypeSizeAndWidth("__SIG_ATOMIC", TI.getSigAtomicType(), TI, Builder); + DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); + DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); + + DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); + DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); + + // The C standard requires the width of uintptr_t and intptr_t to be the same, + // per 7.20.2.4p1. Same for intmax_t and uintmax_t, per 7.20.2.5p1. + assert(TI.getTypeWidth(TI.getUIntPtrType()) == + TI.getTypeWidth(TI.getIntPtrType()) && + "uintptr_t and intptr_t have different widths?"); + assert(TI.getTypeWidth(TI.getUIntMaxType()) == + TI.getTypeWidth(TI.getIntMaxType()) && + "uintmax_t and intmax_t have different widths?"); + + if (TI.hasFloat16Type()) + DefineFloatMacros(Builder, "FLT16", &TI.getHalfFormat(), "F16"); + DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); + DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); + DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); + + // Define a __POINTER_WIDTH__ macro for stdint.h. + Builder.defineMacro("__POINTER_WIDTH__", + Twine((int)TI.getPointerWidth(0))); + + // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. + Builder.defineMacro("__BIGGEST_ALIGNMENT__", + Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); + + if (!LangOpts.CharIsSigned) + Builder.defineMacro("__CHAR_UNSIGNED__"); + + if (!TargetInfo::isTypeSigned(TI.getWCharType())) + Builder.defineMacro("__WCHAR_UNSIGNED__"); + + if (!TargetInfo::isTypeSigned(TI.getWIntType())) + Builder.defineMacro("__WINT_UNSIGNED__"); + + // Define exact-width integer types for stdint.h + DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); + + if (TI.getShortWidth() > TI.getCharWidth()) + DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); + + if (TI.getIntWidth() > TI.getShortWidth()) + DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); + + if (TI.getLongWidth() > TI.getIntWidth()) + DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); + + if (TI.getLongLongWidth() > TI.getLongWidth()) + DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); + + DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); + DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); + DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); + + if (TI.getShortWidth() > TI.getCharWidth()) { + DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); + DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); + DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); + } + + if (TI.getIntWidth() > TI.getShortWidth()) { + DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); + DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); + DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); + } + + if (TI.getLongWidth() > TI.getIntWidth()) { + DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); + DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); + DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); + } + + if (TI.getLongLongWidth() > TI.getLongWidth()) { + DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); + DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); + DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); + } + + DefineLeastWidthIntType(8, true, TI, Builder); + DefineLeastWidthIntType(8, false, TI, Builder); + DefineLeastWidthIntType(16, true, TI, Builder); + DefineLeastWidthIntType(16, false, TI, Builder); + DefineLeastWidthIntType(32, true, TI, Builder); + DefineLeastWidthIntType(32, false, TI, Builder); + DefineLeastWidthIntType(64, true, TI, Builder); + DefineLeastWidthIntType(64, false, TI, Builder); + + DefineFastIntType(8, true, TI, Builder); + DefineFastIntType(8, false, TI, Builder); + DefineFastIntType(16, true, TI, Builder); + DefineFastIntType(16, false, TI, Builder); + DefineFastIntType(32, true, TI, Builder); + DefineFastIntType(32, false, TI, Builder); + DefineFastIntType(64, true, TI, Builder); + DefineFastIntType(64, false, TI, Builder); + + Builder.defineMacro("__USER_LABEL_PREFIX__", TI.getUserLabelPrefix()); + + if (!LangOpts.MathErrno) + Builder.defineMacro("__NO_MATH_ERRNO__"); + + if (LangOpts.FastMath || LangOpts.FiniteMathOnly) + Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); + else + Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); + + if (LangOpts.GNUCVersion) { + if (LangOpts.GNUInline || LangOpts.CPlusPlus) + Builder.defineMacro("__GNUC_GNU_INLINE__"); + else + Builder.defineMacro("__GNUC_STDC_INLINE__"); + + // The value written by __atomic_test_and_set. + // FIXME: This is target-dependent. + Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); + } + + auto addLockFreeMacros = [&](const llvm::Twine &Prefix) { + // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. + unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); +#define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ + Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \ + getLockFreeValue(TI.get##Type##Width(), \ + TI.get##Type##Align(), \ + InlineWidthBits)); + DEFINE_LOCK_FREE_MACRO(BOOL, Bool); + DEFINE_LOCK_FREE_MACRO(CHAR, Char); + if (LangOpts.Char8) + DEFINE_LOCK_FREE_MACRO(CHAR8_T, Char); // Treat char8_t like char. + DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); + DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); + DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); + DEFINE_LOCK_FREE_MACRO(SHORT, Short); + DEFINE_LOCK_FREE_MACRO(INT, Int); + DEFINE_LOCK_FREE_MACRO(LONG, Long); + DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); + Builder.defineMacro(Prefix + "POINTER_LOCK_FREE", + getLockFreeValue(TI.getPointerWidth(0), + TI.getPointerAlign(0), + InlineWidthBits)); +#undef DEFINE_LOCK_FREE_MACRO + }; + addLockFreeMacros("__CLANG_ATOMIC_"); + if (LangOpts.GNUCVersion) + addLockFreeMacros("__GCC_ATOMIC_"); + + if (LangOpts.NoInlineDefine) + Builder.defineMacro("__NO_INLINE__"); + + if (unsigned PICLevel = LangOpts.PICLevel) { + Builder.defineMacro("__PIC__", Twine(PICLevel)); + Builder.defineMacro("__pic__", Twine(PICLevel)); + if (LangOpts.PIE) { + Builder.defineMacro("__PIE__", Twine(PICLevel)); + Builder.defineMacro("__pie__", Twine(PICLevel)); + } + } + + // Macros to control C99 numerics and <float.h> + Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); + Builder.defineMacro("__FLT_RADIX__", "2"); + Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); + + if (LangOpts.getStackProtector() == LangOptions::SSPOn) + Builder.defineMacro("__SSP__"); + else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) + Builder.defineMacro("__SSP_STRONG__", "2"); + else if (LangOpts.getStackProtector() == LangOptions::SSPReq) + Builder.defineMacro("__SSP_ALL__", "3"); + + if (PPOpts.SetUpStaticAnalyzer) + Builder.defineMacro("__clang_analyzer__"); + + if (LangOpts.FastRelaxedMath) + Builder.defineMacro("__FAST_RELAXED_MATH__"); + + if (FEOpts.ProgramAction == frontend::RewriteObjC || + LangOpts.getGC() != LangOptions::NonGC) { + Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); + Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); + Builder.defineMacro("__autoreleasing", ""); + Builder.defineMacro("__unsafe_unretained", ""); + } else if (LangOpts.ObjC) { + Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); + Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); + Builder.defineMacro("__autoreleasing", + "__attribute__((objc_ownership(autoreleasing)))"); + Builder.defineMacro("__unsafe_unretained", + "__attribute__((objc_ownership(none)))"); + } + + // On Darwin, there are __double_underscored variants of the type + // nullability qualifiers. + if (TI.getTriple().isOSDarwin()) { + Builder.defineMacro("__nonnull", "_Nonnull"); + Builder.defineMacro("__null_unspecified", "_Null_unspecified"); + Builder.defineMacro("__nullable", "_Nullable"); + } + + // Add a macro to differentiate between regular iOS/tvOS/watchOS targets and + // the corresponding simulator targets. + if (TI.getTriple().isOSDarwin() && TI.getTriple().isSimulatorEnvironment()) + Builder.defineMacro("__APPLE_EMBEDDED_SIMULATOR__", "1"); + + // OpenMP definition + // OpenMP 2.2: + // In implementations that support a preprocessor, the _OPENMP + // macro name is defined to have the decimal value yyyymm where + // yyyy and mm are the year and the month designations of the + // version of the OpenMP API that the implementation support. + if (!LangOpts.OpenMPSimd) { + switch (LangOpts.OpenMP) { + case 0: + break; + case 31: + Builder.defineMacro("_OPENMP", "201107"); + break; + case 40: + Builder.defineMacro("_OPENMP", "201307"); + break; + case 45: + Builder.defineMacro("_OPENMP", "201511"); + break; + case 51: + Builder.defineMacro("_OPENMP", "202011"); + break; + case 52: + Builder.defineMacro("_OPENMP", "202111"); + break; + default: + // Default version is OpenMP 5.0 + Builder.defineMacro("_OPENMP", "201811"); + break; + } + } + + // CUDA device path compilaton + if (LangOpts.CUDAIsDevice && !LangOpts.HIP) { + // The CUDA_ARCH value is set for the GPU target specified in the NVPTX + // backend's target defines. + Builder.defineMacro("__CUDA_ARCH__"); + } + + // We need to communicate this to our CUDA header wrapper, which in turn + // informs the proper CUDA headers of this choice. + if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { + Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); + } + + // Define a macro indicating that the source file is being compiled with a + // SYCL device compiler which doesn't produce host binary. + if (LangOpts.SYCLIsDevice) { + Builder.defineMacro("__SYCL_DEVICE_ONLY__", "1"); + } + + // OpenCL definitions. + if (LangOpts.OpenCL) { + InitializeOpenCLFeatureTestMacros(TI, LangOpts, Builder); + + if (TI.getTriple().isSPIR() || TI.getTriple().isSPIRV()) + Builder.defineMacro("__IMAGE_SUPPORT__"); + } + + if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) { + // For each extended integer type, g++ defines a macro mapping the + // index of the type (0 in this case) in some list of extended types + // to the type. + Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128"); + Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128"); + } + + // Get other target #defines. + TI.getTargetDefines(LangOpts, Builder); +} + +/// InitializePreprocessor - Initialize the preprocessor getting it and the +/// environment ready to process a single file. This returns true on error. +/// +void clang::InitializePreprocessor( + Preprocessor &PP, const PreprocessorOptions &InitOpts, + const PCHContainerReader &PCHContainerRdr, + const FrontendOptions &FEOpts) { + const LangOptions &LangOpts = PP.getLangOpts(); + std::string PredefineBuffer; + PredefineBuffer.reserve(4080); + llvm::raw_string_ostream Predefines(PredefineBuffer); + MacroBuilder Builder(Predefines); + + // Emit line markers for various builtin sections of the file. We don't do + // this in asm preprocessor mode, because "# 4" is not a line marker directive + // in this mode. + if (!PP.getLangOpts().AsmPreprocessor) + Builder.append("# 1 \"<built-in>\" 3"); + + // Install things like __POWERPC__, __GNUC__, etc into the macro table. + if (InitOpts.UsePredefines) { + // FIXME: This will create multiple definitions for most of the predefined + // macros. This is not the right way to handle this. + if ((LangOpts.CUDA || LangOpts.OpenMPIsDevice || LangOpts.SYCLIsDevice) && + PP.getAuxTargetInfo()) + InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, + PP.getPreprocessorOpts(), Builder); + + InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, + PP.getPreprocessorOpts(), Builder); + + // Install definitions to make Objective-C++ ARC work well with various + // C++ Standard Library implementations. + if (LangOpts.ObjC && LangOpts.CPlusPlus && + (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { + switch (InitOpts.ObjCXXARCStandardLibrary) { + case ARCXX_nolib: + case ARCXX_libcxx: + break; + + case ARCXX_libstdcxx: + AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); + break; + } + } + } + + // Even with predefines off, some macros are still predefined. + // These should all be defined in the preprocessor according to the + // current language configuration. + InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), + FEOpts, Builder); + + // Add on the predefines from the driver. Wrap in a #line directive to report + // that they come from the command line. + if (!PP.getLangOpts().AsmPreprocessor) + Builder.append("# 1 \"<command line>\" 1"); + + // Process #define's and #undef's in the order they are given. + for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { + if (InitOpts.Macros[i].second) // isUndef + Builder.undefineMacro(InitOpts.Macros[i].first); + else + DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, + PP.getDiagnostics()); + } + + // Exit the command line and go back to <built-in> (2 is LC_LEAVE). + if (!PP.getLangOpts().AsmPreprocessor) + Builder.append("# 1 \"<built-in>\" 2"); + + // If -imacros are specified, include them now. These are processed before + // any -include directives. + for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) + AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); + + // Process -include-pch/-include-pth directives. + if (!InitOpts.ImplicitPCHInclude.empty()) + AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, + InitOpts.ImplicitPCHInclude); + + // Process -include directives. + for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { + const std::string &Path = InitOpts.Includes[i]; + AddImplicitInclude(Builder, Path); + } + + // Instruct the preprocessor to skip the preamble. + PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, + InitOpts.PrecompiledPreambleBytes.second); + + // Copy PredefinedBuffer into the Preprocessor. + PP.setPredefines(Predefines.str()); +} |