InitPreprocessor.cpp revision 239462
1193323Sed//===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===// 2193323Sed// 3193323Sed// The LLVM Compiler Infrastructure 4193323Sed// 5193323Sed// This file is distributed under the University of Illinois Open Source 6193323Sed// License. See LICENSE.TXT for details. 7193323Sed// 8193323Sed//===----------------------------------------------------------------------===// 9193323Sed// 10193323Sed// This file implements the clang::InitializePreprocessor function. 11193323Sed// 12193323Sed//===----------------------------------------------------------------------===// 13193323Sed 14193323Sed#include "clang/Basic/Version.h" 15193323Sed#include "clang/Frontend/Utils.h" 16193323Sed#include "clang/Basic/MacroBuilder.h" 17193323Sed#include "clang/Basic/TargetInfo.h" 18193323Sed#include "clang/Frontend/FrontendDiagnostic.h" 19193323Sed#include "clang/Frontend/FrontendOptions.h" 20193323Sed#include "clang/Frontend/PreprocessorOptions.h" 21193323Sed#include "clang/Lex/HeaderSearch.h" 22193323Sed#include "clang/Lex/Preprocessor.h" 23193323Sed#include "clang/Basic/FileManager.h" 24221345Sdim#include "clang/Basic/SourceManager.h" 25193323Sed#include "llvm/ADT/APFloat.h" 26193323Sed#include "llvm/Support/FileSystem.h" 27198892Srdivacky#include "llvm/Support/MemoryBuffer.h" 28193323Sed#include "llvm/Support/Path.h" 29193323Sedusing namespace clang; 30193323Sed 31198090Srdivacky// Append a #define line to Buf for Macro. Macro should be of the form XXX, 32193323Sed// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit 33193323Sed// "#define XXX Y z W". To get a #define with no value, use "XXX=". 34198090Srdivackystatic void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro, 35193323Sed DiagnosticsEngine &Diags) { 36193323Sed std::pair<StringRef, StringRef> MacroPair = Macro.split('='); 37193323Sed StringRef MacroName = MacroPair.first; 38193323Sed StringRef MacroBody = MacroPair.second; 39193323Sed if (MacroName.size() != Macro.size()) { 40193323Sed // Per GCC -D semantics, the macro ends at \n if it exists. 41193323Sed StringRef::size_type End = MacroBody.find_first_of("\n\r"); 42193323Sed if (End != StringRef::npos) 43193323Sed Diags.Report(diag::warn_fe_macro_contains_embedded_newline) 44218893Sdim << MacroName; 45193323Sed Builder.defineMacro(MacroName, MacroBody.substr(0, End)); 46193323Sed } else { 47193323Sed // Push "macroname 1". 48193323Sed Builder.defineMacro(Macro); 49193323Sed } 50193323Sed} 51193323Sed 52193323Sed/// AddImplicitInclude - Add an implicit \#include of the specified file to the 53193323Sed/// predefines buffer. 54193323Sedstatic void AddImplicitInclude(MacroBuilder &Builder, StringRef File, 55193323Sed FileManager &FileMgr) { 56193323Sed Builder.append(Twine("#include \"") + 57193323Sed HeaderSearch::NormalizeDashIncludePath(File, FileMgr) + "\""); 58221345Sdim} 59193323Sed 60193323Sedstatic void AddImplicitIncludeMacros(MacroBuilder &Builder, 61218893Sdim StringRef File, 62198892Srdivacky FileManager &FileMgr) { 63193323Sed Builder.append(Twine("#__include_macros \"") + 64193323Sed HeaderSearch::NormalizeDashIncludePath(File, FileMgr) + "\""); 65193323Sed // Marker token to stop the __include_macros fetch loop. 66218893Sdim Builder.append("##"); // ##? 67218893Sdim} 68218893Sdim 69193323Sed/// AddImplicitIncludePTH - Add an implicit \#include using the original file 70193323Sed/// used to generate a PTH cache. 71193323Sedstatic void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP, 72193323Sed StringRef ImplicitIncludePTH) { 73193323Sed PTHManager *P = PP.getPTHManager(); 74193323Sed // Null check 'P' in the corner case where it couldn't be created. 75193323Sed const char *OriginalFile = P ? P->getOriginalSourceFile() : 0; 76193323Sed 77193323Sed if (!OriginalFile) { 78218893Sdim PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header) 79218893Sdim << ImplicitIncludePTH; 80218893Sdim return; 81218893Sdim } 82221345Sdim 83193323Sed AddImplicitInclude(Builder, OriginalFile, PP.getFileManager()); 84193323Sed} 85193323Sed 86193323Sed/// PickFP - This is used to pick a value based on the FP semantics of the 87212904Sdim/// specified FP model. 88218893Sdimtemplate <typename T> 89193323Sedstatic T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal, 90193323Sed T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 91193323Sed T IEEEQuadVal) { 92193323Sed if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle) 93193323Sed return IEEESingleVal; 94193323Sed if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble) 95193323Sed return IEEEDoubleVal; 96193323Sed if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended) 97198892Srdivacky return X87DoubleExtendedVal; 98218893Sdim if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble) 99218893Sdim return PPCDoubleDoubleVal; 100218893Sdim assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad); 101193323Sed return IEEEQuadVal; 102193323Sed} 103193323Sed 104193323Sedstatic void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, 105193323Sed const llvm::fltSemantics *Sem) { 106193323Sed const char *DenormMin, *Epsilon, *Max, *Min; 107193323Sed DenormMin = PickFP(Sem, "1.40129846e-45F", "4.9406564584124654e-324", 108193323Sed "3.64519953188247460253e-4951L", 109193323Sed "4.94065645841246544176568792868221e-324L", 110193323Sed "6.47517511943802511092443895822764655e-4966L"); 111193323Sed int Digits = PickFP(Sem, 6, 15, 18, 31, 33); 112193323Sed Epsilon = PickFP(Sem, "1.19209290e-7F", "2.2204460492503131e-16", 113193323Sed "1.08420217248550443401e-19L", 114193323Sed "4.94065645841246544176568792868221e-324L", 115193323Sed "1.92592994438723585305597794258492732e-34L"); 116193323Sed int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113); 117193323Sed int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931); 118193323Sed int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932); 119193323Sed int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381); 120193323Sed int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384); 121193323Sed Min = PickFP(Sem, "1.17549435e-38F", "2.2250738585072014e-308", 122193323Sed "3.36210314311209350626e-4932L", 123193323Sed "2.00416836000897277799610805135016e-292L", 124193323Sed "3.36210314311209350626267781732175260e-4932L"); 125193323Sed Max = PickFP(Sem, "3.40282347e+38F", "1.7976931348623157e+308", 126193323Sed "1.18973149535723176502e+4932L", 127193323Sed "1.79769313486231580793728971405301e+308L", 128193323Sed "1.18973149535723176508575932662800702e+4932L"); 129193323Sed 130193323Sed SmallString<32> DefPrefix; 131193323Sed DefPrefix = "__"; 132193323Sed DefPrefix += Prefix; 133193323Sed DefPrefix += "_"; 134193323Sed 135193323Sed Builder.defineMacro(DefPrefix + "DENORM_MIN__", DenormMin); 136206083Srdivacky Builder.defineMacro(DefPrefix + "HAS_DENORM__"); 137193323Sed Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits)); 138193323Sed Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)); 139193323Sed Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); 140193323Sed Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); 141193323Sed Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits)); 142193323Sed 143193323Sed Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp)); 144193323Sed Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp)); 145218893Sdim Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)); 146218893Sdim 147218893Sdim Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")"); 148218893Sdim Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")"); 149218893Sdim Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)); 150193323Sed} 151193323Sed 152193323Sed 153193323Sed/// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro 154194178Sed/// named MacroName with the max value for a type with width 'TypeWidth' a 155194178Sed/// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). 156194178Sedstatic void DefineTypeSize(StringRef MacroName, unsigned TypeWidth, 157194178Sed StringRef ValSuffix, bool isSigned, 158206083Srdivacky MacroBuilder &Builder) { 159193323Sed llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth) 160193323Sed : llvm::APInt::getMaxValue(TypeWidth); 161207618Srdivacky Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix); 162207618Srdivacky} 163206083Srdivacky 164194178Sed/// DefineTypeSize - An overloaded helper that uses TargetInfo to determine 165193323Sed/// the width, suffix, and signedness of the given type 166193323Sedstatic void DefineTypeSize(StringRef MacroName, TargetInfo::IntType Ty, 167193323Sed const TargetInfo &TI, MacroBuilder &Builder) { 168193323Sed DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 169193323Sed TI.isTypeSigned(Ty), Builder); 170193323Sed} 171193323Sed 172193323Sedstatic void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, 173193323Sed MacroBuilder &Builder) { 174193323Sed Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); 175206083Srdivacky} 176206083Srdivacky 177207618Srdivackystatic void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty, 178210299Sed const TargetInfo &TI, MacroBuilder &Builder) { 179210299Sed Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty))); 180210299Sed} 181193323Sed 182218893Sdimstatic void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth, 183218893Sdim const TargetInfo &TI, MacroBuilder &Builder) { 184218893Sdim Builder.defineMacro(MacroName, 185218893Sdim Twine(BitWidth / TI.getCharWidth())); 186218893Sdim} 187193323Sed 188210299Sedstatic void DefineExactWidthIntType(TargetInfo::IntType Ty, 189193323Sed const TargetInfo &TI, MacroBuilder &Builder) { 190206083Srdivacky int TypeWidth = TI.getTypeWidth(Ty); 191193323Sed 192193323Sed // Use the target specified int64 type, when appropriate, so that [u]int64_t 193193323Sed // ends up being defined in terms of the correct type. 194193323Sed if (TypeWidth == 64) 195193323Sed Ty = TI.getInt64Type(); 196206083Srdivacky 197193323Sed DefineType("__INT" + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 198193323Sed 199206083Srdivacky StringRef ConstSuffix(TargetInfo::getTypeConstantSuffix(Ty)); 200193323Sed if (!ConstSuffix.empty()) 201193323Sed Builder.defineMacro("__INT" + Twine(TypeWidth) + "_C_SUFFIX__", 202193323Sed ConstSuffix); 203193323Sed} 204193323Sed 205193323Sed/// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with 206193323Sed/// the specified properties. 207193323Sedstatic const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign, 208193323Sed unsigned InlineWidth) { 209207618Srdivacky // Fully-aligned, power-of-2 sizes no larger than the inline 210207618Srdivacky // width will be inlined as lock-free operations. 211193323Sed if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 && 212193323Sed TypeWidth <= InlineWidth) 213193323Sed return "2"; // "always lock free" 214193323Sed // We cannot be certain what operations the lib calls might be 215193323Sed // able to implement as lock-free on future processors. 216193323Sed return "1"; // "sometimes lock free" 217193323Sed} 218193323Sed 219193323Sed/// \brief Add definitions required for a smooth interaction between 220193323Sed/// Objective-C++ automated reference counting and libstdc++ (4.2). 221193323Sedstatic void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts, 222193323Sed MacroBuilder &Builder) { 223193323Sed Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR"); 224193323Sed 225193323Sed std::string Result; 226193323Sed { 227193323Sed // Provide specializations for the __is_scalar type trait so that 228193323Sed // lifetime-qualified objects are not considered "scalar" types, which 229193323Sed // libstdc++ uses as an indicator of the presence of trivial copy, assign, 230193323Sed // default-construct, and destruct semantics (none of which hold for 231193323Sed // lifetime-qualified objects in ARC). 232193323Sed llvm::raw_string_ostream Out(Result); 233193323Sed 234193323Sed Out << "namespace std {\n" 235193323Sed << "\n" 236206083Srdivacky << "struct __true_type;\n" 237193323Sed << "struct __false_type;\n" 238193323Sed << "\n"; 239193323Sed 240193323Sed Out << "template<typename _Tp> struct __is_scalar;\n" 241193323Sed << "\n"; 242193323Sed 243218893Sdim Out << "template<typename _Tp>\n" 244223017Sdim << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n" 245223017Sdim << " enum { __value = 0 };\n" 246210299Sed << " typedef __false_type __type;\n" 247193323Sed << "};\n" 248210299Sed << "\n"; 249193323Sed 250223017Sdim if (LangOpts.ObjCRuntimeHasWeak) { 251223017Sdim Out << "template<typename _Tp>\n" 252223017Sdim << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n" 253193323Sed << " enum { __value = 0 };\n" 254193323Sed << " typedef __false_type __type;\n" 255193323Sed << "};\n" 256193323Sed << "\n"; 257210299Sed } 258193323Sed 259193323Sed Out << "template<typename _Tp>\n" 260194178Sed << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))" 261193323Sed << " _Tp> {\n" 262193323Sed << " enum { __value = 0 };\n" 263193323Sed << " typedef __false_type __type;\n" 264193323Sed << "};\n" 265193323Sed << "\n"; 266193323Sed 267210299Sed Out << "}\n"; 268193323Sed } 269193323Sed Builder.append(Result); 270193323Sed} 271193323Sed 272199481Srdivackystatic void InitializeStandardPredefinedMacros(const TargetInfo &TI, 273193323Sed const LangOptions &LangOpts, 274193323Sed const FrontendOptions &FEOpts, 275193323Sed MacroBuilder &Builder) { 276193323Sed if (!LangOpts.MicrosoftMode && !LangOpts.TraditionalCPP) 277193323Sed Builder.defineMacro("__STDC__"); 278193323Sed if (LangOpts.Freestanding) 279193323Sed Builder.defineMacro("__STDC_HOSTED__", "0"); 280193323Sed else 281193323Sed Builder.defineMacro("__STDC_HOSTED__"); 282193323Sed 283193323Sed if (!LangOpts.CPlusPlus) { 284193323Sed if (LangOpts.C11) 285193323Sed Builder.defineMacro("__STDC_VERSION__", "201112L"); 286193323Sed else if (LangOpts.C99) 287193323Sed Builder.defineMacro("__STDC_VERSION__", "199901L"); 288193323Sed else if (!LangOpts.GNUMode && LangOpts.Digraphs) 289193323Sed Builder.defineMacro("__STDC_VERSION__", "199409L"); 290193323Sed } else { 291193323Sed // C++11 [cpp.predefined]p1: 292193323Sed // The name __cplusplus is defined to the value 201103L when compiling a 293193323Sed // C++ translation unit. 294193323Sed if (LangOpts.CPlusPlus0x) 295193323Sed Builder.defineMacro("__cplusplus", "201103L"); 296193323Sed // C++03 [cpp.predefined]p1: 297193323Sed // The name __cplusplus is defined to the value 199711L when compiling a 298193323Sed // C++ translation unit. 299193323Sed else 300193323Sed Builder.defineMacro("__cplusplus", "199711L"); 301193323Sed } 302193323Sed 303193323Sed if (LangOpts.ObjC1) 304193323Sed Builder.defineMacro("__OBJC__"); 305193323Sed 306193323Sed // Not "standard" per se, but available even with the -undef flag. 307193323Sed if (LangOpts.AsmPreprocessor) 308199481Srdivacky Builder.defineMacro("__ASSEMBLER__"); 309193323Sed} 310193323Sed 311193323Sedstatic void InitializePredefinedMacros(const TargetInfo &TI, 312193323Sed const LangOptions &LangOpts, 313193323Sed const FrontendOptions &FEOpts, 314193323Sed MacroBuilder &Builder) { 315193323Sed // Compiler version introspection macros. 316193323Sed Builder.defineMacro("__llvm__"); // LLVM Backend 317193323Sed Builder.defineMacro("__clang__"); // Clang Frontend 318193323Sed#define TOSTR2(X) #X 319193323Sed#define TOSTR(X) TOSTR2(X) 320193323Sed Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 321193323Sed Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 322193323Sed#ifdef CLANG_VERSION_PATCHLEVEL 323193323Sed Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 324193323Sed#else 325193323Sed Builder.defineMacro("__clang_patchlevel__", "0"); 326193323Sed#endif 327193323Sed Builder.defineMacro("__clang_version__", 328193323Sed "\"" CLANG_VERSION_STRING " (" 329199481Srdivacky + getClangFullRepositoryVersion() + ")\""); 330218893Sdim#undef TOSTR 331204642Srdivacky#undef TOSTR2 332193323Sed if (!LangOpts.MicrosoftMode) { 333199481Srdivacky // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 334193323Sed // not compiling for MSVC compatibility 335193323Sed Builder.defineMacro("__GNUC_MINOR__", "2"); 336193323Sed Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 337193323Sed Builder.defineMacro("__GNUC__", "4"); 338193323Sed Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 339193323Sed } 340193323Sed 341193323Sed // Define macros for the C11 / C++11 memory orderings 342193323Sed Builder.defineMacro("__ATOMIC_RELAXED", "0"); 343193323Sed Builder.defineMacro("__ATOMIC_CONSUME", "1"); 344193323Sed Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 345193323Sed Builder.defineMacro("__ATOMIC_RELEASE", "3"); 346218893Sdim Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 347199481Srdivacky Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 348193323Sed 349193323Sed // Support for #pragma redefine_extname (Sun compatibility) 350193323Sed Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 351199481Srdivacky 352193323Sed // As sad as it is, enough software depends on the __VERSION__ for version 353193323Sed // checks that it is necessary to report 4.2.1 (the base GCC version we claim 354193323Sed // compatibility with) first. 355193323Sed Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 356193323Sed Twine(getClangFullCPPVersion()) + "\""); 357193323Sed 358193323Sed // Initialize language-specific preprocessor defines. 359193323Sed 360193323Sed // Standard conforming mode? 361193323Sed if (!LangOpts.GNUMode) 362193323Sed Builder.defineMacro("__STRICT_ANSI__"); 363193323Sed 364193323Sed if (LangOpts.CPlusPlus0x) 365193323Sed Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 366194178Sed 367193323Sed if (LangOpts.ObjC1) { 368193323Sed if (LangOpts.ObjCRuntime.isNonFragile()) { 369199481Srdivacky Builder.defineMacro("__OBJC2__"); 370193323Sed 371193323Sed if (LangOpts.ObjCExceptions) 372193323Sed Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 373193323Sed } 374193323Sed 375193323Sed if (LangOpts.getGC() != LangOptions::NonGC) 376193323Sed Builder.defineMacro("__OBJC_GC__"); 377193323Sed 378193323Sed if (LangOpts.ObjCRuntime.isNeXTFamily()) 379193323Sed Builder.defineMacro("__NEXT_RUNTIME__"); 380193323Sed 381193323Sed Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 382194178Sed Builder.defineMacro("IBOutletCollection(ClassName)", 383218893Sdim "__attribute__((iboutletcollection(ClassName)))"); 384193323Sed Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 385193323Sed } 386193323Sed 387193323Sed // darwin_constant_cfstrings controls this. This is also dependent 388193323Sed // on other things like the runtime I believe. This is set even for C code. 389193323Sed if (!LangOpts.NoConstantCFStrings) 390193323Sed Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 391193323Sed 392193323Sed if (LangOpts.ObjC2) 393218893Sdim Builder.defineMacro("OBJC_NEW_PROPERTIES"); 394193323Sed 395193323Sed if (LangOpts.PascalStrings) 396193323Sed Builder.defineMacro("__PASCAL_STRINGS__"); 397218893Sdim 398193323Sed if (LangOpts.Blocks) { 399193323Sed Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 400193323Sed Builder.defineMacro("__BLOCKS__"); 401218893Sdim } 402193323Sed 403193323Sed if (LangOpts.CXXExceptions) 404193323Sed Builder.defineMacro("__EXCEPTIONS"); 405193323Sed if (LangOpts.RTTI) 406193323Sed Builder.defineMacro("__GXX_RTTI"); 407193323Sed if (LangOpts.SjLjExceptions) 408193323Sed Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 409193323Sed 410193323Sed if (LangOpts.Deprecated) 411193323Sed Builder.defineMacro("__DEPRECATED"); 412193323Sed 413193323Sed if (LangOpts.CPlusPlus) { 414193323Sed Builder.defineMacro("__GNUG__", "4"); 415218893Sdim Builder.defineMacro("__GXX_WEAK__"); 416218893Sdim Builder.defineMacro("__private_extern__", "extern"); 417193323Sed } 418193323Sed 419218893Sdim if (LangOpts.MicrosoftExt) { 420193323Sed // Both __PRETTY_FUNCTION__ and __FUNCTION__ are GCC extensions, however 421193323Sed // VC++ appears to only like __FUNCTION__. 422193323Sed Builder.defineMacro("__PRETTY_FUNCTION__", "__FUNCTION__"); 423193323Sed // Work around some issues with Visual C++ headerws. 424193323Sed if (LangOpts.CPlusPlus) { 425193323Sed // Since we define wchar_t in C++ mode. 426193323Sed Builder.defineMacro("_WCHAR_T_DEFINED"); 427193323Sed Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 428193323Sed // FIXME: Support Microsoft's __identifier extension in the lexer. 429193323Sed Builder.append("#define __identifier(x) x"); 430193323Sed Builder.append("class type_info;"); 431218893Sdim } 432193323Sed 433193323Sed if (LangOpts.CPlusPlus0x) { 434193323Sed Builder.defineMacro("_HAS_CHAR16_T_LANGUAGE_SUPPORT", "1"); 435193323Sed } 436218893Sdim } 437193323Sed 438193323Sed if (LangOpts.Optimize) 439193323Sed Builder.defineMacro("__OPTIMIZE__"); 440193323Sed if (LangOpts.OptimizeSize) 441193323Sed Builder.defineMacro("__OPTIMIZE_SIZE__"); 442218893Sdim 443193323Sed if (LangOpts.FastMath) 444193323Sed Builder.defineMacro("__FAST_MATH__"); 445193323Sed 446193323Sed // Initialize target-specific preprocessor defines. 447193323Sed 448193323Sed // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 449193323Sed // to the macro __BYTE_ORDER (no trailing underscores) 450193323Sed // from glibc's <endian.h> header. 451198090Srdivacky // We don't support the PDP-11 as a target, but include 452193323Sed // the define so it can still be compared against. 453193323Sed Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 454193323Sed Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 455193323Sed Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 456198090Srdivacky if (TI.isBigEndian()) 457198090Srdivacky Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 458198090Srdivacky else 459204642Srdivacky Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 460198090Srdivacky 461198090Srdivacky 462198090Srdivacky if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 463218893Sdim && TI.getIntWidth() == 32) { 464193323Sed Builder.defineMacro("_LP64"); 465193323Sed Builder.defineMacro("__LP64__"); 466193323Sed } 467193323Sed 468193323Sed // Define type sizing macros based on the target properties. 469193323Sed assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 470193323Sed Builder.defineMacro("__CHAR_BIT__", "8"); 471193323Sed 472193323Sed DefineTypeSize("__SCHAR_MAX__", TI.getCharWidth(), "", true, Builder); 473193323Sed DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 474193323Sed DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 475193323Sed DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 476193323Sed DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 477193323Sed DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 478193323Sed DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 479193323Sed 480193323Sed DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 481193323Sed DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 482193323Sed DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 483193323Sed DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 484193323Sed DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 485193323Sed DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 486193323Sed DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 487193323Sed DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 488218893Sdim DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 489193323Sed TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 490193323Sed DefineTypeSizeof("__SIZEOF_SIZE_T__", 491193323Sed TI.getTypeWidth(TI.getSizeType()), TI, Builder); 492193323Sed DefineTypeSizeof("__SIZEOF_WCHAR_T__", 493193323Sed TI.getTypeWidth(TI.getWCharType()), TI, Builder); 494199481Srdivacky DefineTypeSizeof("__SIZEOF_WINT_T__", 495193323Sed TI.getTypeWidth(TI.getWIntType()), TI, Builder); 496193323Sed 497193323Sed DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 498218893Sdim DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 499193323Sed DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 500193323Sed DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 501193323Sed DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 502193323Sed DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 503193323Sed DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 504193323Sed DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 505193323Sed DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 506193323Sed DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 507193323Sed DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 508193323Sed DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 509193323Sed DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 510218893Sdim DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 511193323Sed DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 512193323Sed DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 513193323Sed 514193323Sed DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat()); 515193323Sed DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat()); 516199481Srdivacky DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat()); 517193323Sed 518199481Srdivacky // Define a __POINTER_WIDTH__ macro for stdint.h. 519193323Sed Builder.defineMacro("__POINTER_WIDTH__", 520198090Srdivacky Twine((int)TI.getPointerWidth(0))); 521193323Sed 522198090Srdivacky if (!LangOpts.CharIsSigned) 523193323Sed Builder.defineMacro("__CHAR_UNSIGNED__"); 524193323Sed 525218893Sdim if (!TargetInfo::isTypeSigned(TI.getWCharType())) 526193323Sed Builder.defineMacro("__WCHAR_UNSIGNED__"); 527193323Sed 528193323Sed if (!TargetInfo::isTypeSigned(TI.getWIntType())) 529193323Sed Builder.defineMacro("__WINT_UNSIGNED__"); 530193323Sed 531193323Sed // Define exact-width integer types for stdint.h 532193323Sed Builder.defineMacro("__INT" + Twine(TI.getCharWidth()) + "_TYPE__", 533193323Sed "char"); 534193323Sed 535193323Sed if (TI.getShortWidth() > TI.getCharWidth()) 536193323Sed DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 537193323Sed 538193323Sed if (TI.getIntWidth() > TI.getShortWidth()) 539193323Sed DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 540193323Sed 541193323Sed if (TI.getLongWidth() > TI.getIntWidth()) 542193323Sed DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 543193323Sed 544218893Sdim if (TI.getLongLongWidth() > TI.getLongWidth()) 545193323Sed DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 546193323Sed 547193323Sed if (const char *Prefix = TI.getUserLabelPrefix()) 548193323Sed Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix); 549199481Srdivacky 550193323Sed if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 551193323Sed Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 552199481Srdivacky else 553193323Sed Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 554198090Srdivacky 555193323Sed if (LangOpts.GNUInline) 556198090Srdivacky Builder.defineMacro("__GNUC_GNU_INLINE__"); 557193323Sed else 558193323Sed Builder.defineMacro("__GNUC_STDC_INLINE__"); 559218893Sdim 560193323Sed // The value written by __atomic_test_and_set. 561193323Sed // FIXME: This is target-dependent. 562193323Sed Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 563193323Sed 564193323Sed // Used by libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 565193323Sed unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 566193323Sed#define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 567193323Sed Builder.defineMacro("__GCC_ATOMIC_" #TYPE "_LOCK_FREE", \ 568193323Sed getLockFreeValue(TI.get##Type##Width(), \ 569193323Sed TI.get##Type##Align(), \ 570193323Sed InlineWidthBits)); 571218893Sdim DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 572202375Srdivacky DEFINE_LOCK_FREE_MACRO(CHAR, Char); 573193323Sed DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 574199481Srdivacky DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 575193323Sed DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 576193323Sed DEFINE_LOCK_FREE_MACRO(SHORT, Short); 577193323Sed DEFINE_LOCK_FREE_MACRO(INT, Int); 578193323Sed DEFINE_LOCK_FREE_MACRO(LONG, Long); 579193323Sed DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 580193323Sed Builder.defineMacro("__GCC_ATOMIC_POINTER_LOCK_FREE", 581193323Sed getLockFreeValue(TI.getPointerWidth(0), 582193323Sed TI.getPointerAlign(0), 583193323Sed InlineWidthBits)); 584193323Sed#undef DEFINE_LOCK_FREE_MACRO 585193323Sed 586193323Sed if (LangOpts.NoInlineDefine) 587193323Sed Builder.defineMacro("__NO_INLINE__"); 588193323Sed 589193323Sed if (unsigned PICLevel = LangOpts.PICLevel) { 590193323Sed Builder.defineMacro("__PIC__", Twine(PICLevel)); 591193323Sed Builder.defineMacro("__pic__", Twine(PICLevel)); 592193323Sed } 593193323Sed if (unsigned PIELevel = LangOpts.PIELevel) { 594193323Sed Builder.defineMacro("__PIE__", Twine(PIELevel)); 595193323Sed Builder.defineMacro("__pie__", Twine(PIELevel)); 596193323Sed } 597193323Sed 598193323Sed // Macros to control C99 numerics and <float.h> 599193323Sed Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 600193323Sed Builder.defineMacro("__FLT_RADIX__", "2"); 601193323Sed int Dig = PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36); 602193323Sed Builder.defineMacro("__DECIMAL_DIG__", Twine(Dig)); 603193323Sed 604193323Sed if (LangOpts.getStackProtector() == LangOptions::SSPOn) 605193323Sed Builder.defineMacro("__SSP__"); 606193323Sed else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 607193323Sed Builder.defineMacro("__SSP_ALL__", "2"); 608198090Srdivacky 609193323Sed if (FEOpts.ProgramAction == frontend::RewriteObjC) 610193323Sed Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 611193323Sed 612193323Sed // Define a macro that exists only when using the static analyzer. 613193323Sed if (FEOpts.ProgramAction == frontend::RunAnalysis) 614193323Sed Builder.defineMacro("__clang_analyzer__"); 615193323Sed 616193323Sed if (LangOpts.FastRelaxedMath) 617193323Sed Builder.defineMacro("__FAST_RELAXED_MATH__"); 618193323Sed 619193323Sed if (LangOpts.ObjCAutoRefCount) { 620193323Sed Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 621193323Sed Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 622193323Sed Builder.defineMacro("__autoreleasing", 623193323Sed "__attribute__((objc_ownership(autoreleasing)))"); 624193323Sed Builder.defineMacro("__unsafe_unretained", 625193323Sed "__attribute__((objc_ownership(none)))"); 626193323Sed } 627193323Sed 628193323Sed // Get other target #defines. 629193323Sed TI.getTargetDefines(LangOpts, Builder); 630193323Sed} 631193323Sed 632193323Sed// Initialize the remapping of files to alternative contents, e.g., 633193323Sed// those specified through other files. 634193323Sedstatic void InitializeFileRemapping(DiagnosticsEngine &Diags, 635193323Sed SourceManager &SourceMgr, 636193323Sed FileManager &FileMgr, 637218893Sdim const PreprocessorOptions &InitOpts) { 638193323Sed // Remap files in the source manager (with buffers). 639207618Srdivacky for (PreprocessorOptions::const_remapped_file_buffer_iterator 640207618Srdivacky Remap = InitOpts.remapped_file_buffer_begin(), 641207618Srdivacky RemapEnd = InitOpts.remapped_file_buffer_end(); 642207618Srdivacky Remap != RemapEnd; 643207618Srdivacky ++Remap) { 644207618Srdivacky // Create the file entry for the file that we're mapping from. 645207618Srdivacky const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first, 646193323Sed Remap->second->getBufferSize(), 647207618Srdivacky 0); 648193323Sed if (!FromFile) { 649207618Srdivacky Diags.Report(diag::err_fe_remap_missing_from_file) 650193323Sed << Remap->first; 651193323Sed if (!InitOpts.RetainRemappedFileBuffers) 652207618Srdivacky delete Remap->second; 653205407Srdivacky continue; 654207618Srdivacky } 655193323Sed 656193323Sed // Override the contents of the "from" file with the contents of 657207618Srdivacky // the "to" file. 658205407Srdivacky SourceMgr.overrideFileContents(FromFile, Remap->second, 659207618Srdivacky InitOpts.RetainRemappedFileBuffers); 660193323Sed } 661193323Sed 662207618Srdivacky // Remap files in the source manager (with other files). 663193323Sed for (PreprocessorOptions::const_remapped_file_iterator 664207618Srdivacky Remap = InitOpts.remapped_file_begin(), 665193323Sed RemapEnd = InitOpts.remapped_file_end(); 666207618Srdivacky Remap != RemapEnd; 667193323Sed ++Remap) { 668193323Sed // Find the file that we're mapping to. 669203954Srdivacky const FileEntry *ToFile = FileMgr.getFile(Remap->second); 670203954Srdivacky if (!ToFile) { 671207618Srdivacky Diags.Report(diag::err_fe_remap_missing_to_file) 672193323Sed << Remap->first << Remap->second; 673204642Srdivacky continue; 674193323Sed } 675207618Srdivacky 676193323Sed // Create the file entry for the file that we're mapping from. 677193323Sed const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first, 678207618Srdivacky ToFile->getSize(), 0); 679193323Sed if (!FromFile) { 680193323Sed Diags.Report(diag::err_fe_remap_missing_from_file) 681193323Sed << Remap->first; 682193323Sed continue; 683193323Sed } 684193323Sed 685207618Srdivacky // Override the contents of the "from" file with the contents of 686207618Srdivacky // the "to" file. 687207618Srdivacky SourceMgr.overrideFileContents(FromFile, ToFile); 688207618Srdivacky } 689207618Srdivacky 690207618Srdivacky SourceMgr.setOverridenFilesKeepOriginalName( 691207618Srdivacky InitOpts.RemappedFilesKeepOriginalName); 692193323Sed} 693193323Sed 694207618Srdivacky/// InitializePreprocessor - Initialize the preprocessor getting it and the 695193323Sed/// environment ready to process a single file. This returns true on error. 696193323Sed/// 697193323Sedvoid clang::InitializePreprocessor(Preprocessor &PP, 698207618Srdivacky const PreprocessorOptions &InitOpts, 699193323Sed const HeaderSearchOptions &HSOpts, 700193323Sed const FrontendOptions &FEOpts) { 701207618Srdivacky const LangOptions &LangOpts = PP.getLangOpts(); 702193323Sed std::string PredefineBuffer; 703193323Sed PredefineBuffer.reserve(4080); 704193323Sed llvm::raw_string_ostream Predefines(PredefineBuffer); 705199481Srdivacky MacroBuilder Builder(Predefines); 706193323Sed 707193323Sed InitializeFileRemapping(PP.getDiagnostics(), PP.getSourceManager(), 708193323Sed PP.getFileManager(), InitOpts); 709193323Sed 710193323Sed // Emit line markers for various builtin sections of the file. We don't do 711193323Sed // this in asm preprocessor mode, because "# 4" is not a line marker directive 712193323Sed // in this mode. 713193323Sed if (!PP.getLangOpts().AsmPreprocessor) 714193323Sed Builder.append("# 1 \"<built-in>\" 3"); 715193323Sed 716193323Sed // Install things like __POWERPC__, __GNUC__, etc into the macro table. 717193323Sed if (InitOpts.UsePredefines) { 718207618Srdivacky InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 719207618Srdivacky 720193323Sed // Install definitions to make Objective-C++ ARC work well with various 721193323Sed // C++ Standard Library implementations. 722207618Srdivacky if (LangOpts.ObjC1 && LangOpts.CPlusPlus && LangOpts.ObjCAutoRefCount) { 723193323Sed switch (InitOpts.ObjCXXARCStandardLibrary) { 724193323Sed case ARCXX_nolib: 725207618Srdivacky case ARCXX_libcxx: 726207618Srdivacky break; 727193323Sed 728207618Srdivacky case ARCXX_libstdcxx: 729193323Sed AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 730193323Sed break; 731193323Sed } 732193323Sed } 733193323Sed } 734193323Sed 735193323Sed // Even with predefines off, some macros are still predefined. 736193323Sed // These should all be defined in the preprocessor according to the 737193323Sed // current language configuration. 738193323Sed InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 739199481Srdivacky FEOpts, Builder); 740193323Sed 741193323Sed // Add on the predefines from the driver. Wrap in a #line directive to report 742193323Sed // that they come from the command line. 743193323Sed if (!PP.getLangOpts().AsmPreprocessor) 744193323Sed Builder.append("# 1 \"<command line>\" 1"); 745193323Sed 746193323Sed // Process #define's and #undef's in the order they are given. 747193323Sed for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 748193323Sed if (InitOpts.Macros[i].second) // isUndef 749193323Sed Builder.undefineMacro(InitOpts.Macros[i].first); 750193323Sed else 751193323Sed DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 752193323Sed PP.getDiagnostics()); 753193323Sed } 754193323Sed 755193323Sed // If -imacros are specified, include them now. These are processed before 756198090Srdivacky // any -include directives. 757199481Srdivacky for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 758193323Sed AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i], 759193323Sed PP.getFileManager()); 760193323Sed 761193323Sed // Process -include directives. 762193323Sed for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 763193323Sed const std::string &Path = InitOpts.Includes[i]; 764193323Sed if (Path == InitOpts.ImplicitPTHInclude) 765193323Sed AddImplicitIncludePTH(Builder, PP, Path); 766193323Sed else 767193323Sed AddImplicitInclude(Builder, Path, PP.getFileManager()); 768193323Sed } 769193323Sed 770193323Sed // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 771193323Sed if (!PP.getLangOpts().AsmPreprocessor) 772193323Sed Builder.append("# 1 \"<built-in>\" 2"); 773199481Srdivacky 774193323Sed // Instruct the preprocessor to skip the preamble. 775193323Sed PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 776193323Sed InitOpts.PrecompiledPreambleBytes.second); 777193323Sed 778193323Sed // Copy PredefinedBuffer into the Preprocessor. 779218893Sdim PP.setPredefines(Predefines.str()); 780193323Sed 781193323Sed // Initialize the header search object. 782193323Sed ApplyHeaderSearchOptions(PP.getHeaderSearchInfo(), HSOpts, 783193323Sed PP.getLangOpts(), 784199481Srdivacky PP.getTargetInfo().getTriple()); 785193323Sed} 786193323Sed