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Chris Lattnere116ccf2009-04-21 05:40:52 +00001//===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the clang::InitializePreprocessor function.
11//
12//===----------------------------------------------------------------------===//
13
Daniel Dunbar8863b982009-11-07 04:20:15 +000014#include "clang/Frontend/Utils.h"
Chandler Carruth103b71c2010-01-20 06:13:02 +000015#include "clang/Basic/MacroBuilder.h"
Chris Lattnere116ccf2009-04-21 05:40:52 +000016#include "clang/Basic/TargetInfo.h"
Douglas Gregor2973c0e2009-12-02 16:32:41 +000017#include "clang/Frontend/FrontendDiagnostic.h"
Fariborz Jahanian7d957472010-01-13 18:51:17 +000018#include "clang/Frontend/FrontendOptions.h"
Daniel Dunbar8863b982009-11-07 04:20:15 +000019#include "clang/Frontend/PreprocessorOptions.h"
Chris Lattnere116ccf2009-04-21 05:40:52 +000020#include "clang/Lex/Preprocessor.h"
Douglas Gregor2973c0e2009-12-02 16:32:41 +000021#include "clang/Basic/FileManager.h"
22#include "clang/Basic/SourceManager.h"
Benjamin Kramera3d8ced2010-01-09 16:17:37 +000023#include "llvm/ADT/APFloat.h"
Douglas Gregor2973c0e2009-12-02 16:32:41 +000024#include "llvm/Support/MemoryBuffer.h"
Chris Lattnere116ccf2009-04-21 05:40:52 +000025#include "llvm/System/Path.h"
Chris Lattner47c06ee2009-11-02 21:48:09 +000026using namespace clang;
Chris Lattnere116ccf2009-04-21 05:40:52 +000027
28// Append a #define line to Buf for Macro. Macro should be of the form XXX,
29// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
30// "#define XXX Y z W". To get a #define with no value, use "XXX=".
Benjamin Kramera3d8ced2010-01-09 16:17:37 +000031static void DefineBuiltinMacro(MacroBuilder &Builder, llvm::StringRef Macro,
Daniel Dunbar1ee4b9e2010-01-10 00:46:21 +000032 Diagnostic &Diags) {
Kovarththanan Rajaratnam8746e4e2010-01-09 09:27:11 +000033 std::pair<llvm::StringRef, llvm::StringRef> MacroPair = Macro.split('=');
34 llvm::StringRef MacroName = MacroPair.first;
35 llvm::StringRef MacroBody = MacroPair.second;
Daniel Dunbar1ee4b9e2010-01-10 00:46:21 +000036 if (MacroName.size() != Macro.size()) {
Chris Lattnere116ccf2009-04-21 05:40:52 +000037 // Per GCC -D semantics, the macro ends at \n if it exists.
Benjamin Kramera3d8ced2010-01-09 16:17:37 +000038 llvm::StringRef::size_type End = MacroBody.find_first_of("\n\r");
Daniel Dunbar1ee4b9e2010-01-10 00:46:21 +000039 if (End != llvm::StringRef::npos)
40 Diags.Report(diag::warn_fe_macro_contains_embedded_newline)
Kovarththanan Rajaratnam8746e4e2010-01-09 09:27:11 +000041 << MacroName;
Benjamin Kramerb1b5b902010-01-09 17:43:21 +000042 Builder.defineMacro(MacroName, MacroBody.substr(0, End));
Chris Lattnere116ccf2009-04-21 05:40:52 +000043 } else {
44 // Push "macroname 1".
Benjamin Kramerb1b5b902010-01-09 17:43:21 +000045 Builder.defineMacro(Macro);
Chris Lattnere116ccf2009-04-21 05:40:52 +000046 }
Chris Lattnerdcdecf42009-05-15 16:08:43 +000047}
48
Daniel Dunbarc7162932009-11-11 23:58:53 +000049std::string clang::NormalizeDashIncludePath(llvm::StringRef File) {
Daniel Dunbar1e7c6b62009-04-22 08:53:01 +000050 // Implicit include paths should be resolved relative to the current
51 // working directory first, and then use the regular header search
52 // mechanism. The proper way to handle this is to have the
53 // predefines buffer located at the current working directory, but
54 // it has not file entry. For now, workaround this by using an
55 // absolute path if we find the file here, and otherwise letting
56 // header search handle it.
Chris Lattnere116ccf2009-04-21 05:40:52 +000057 llvm::sys::Path Path(File);
58 Path.makeAbsolute();
Daniel Dunbar1e7c6b62009-04-22 08:53:01 +000059 if (!Path.exists())
60 Path = File;
Mike Stump1eb44332009-09-09 15:08:12 +000061
Daniel Dunbarc7162932009-11-11 23:58:53 +000062 return Lexer::Stringify(Path.str());
63}
64
Chris Lattnere116ccf2009-04-21 05:40:52 +000065/// AddImplicitInclude - Add an implicit #include of the specified file to the
66/// predefines buffer.
Benjamin Kramera3d8ced2010-01-09 16:17:37 +000067static void AddImplicitInclude(MacroBuilder &Builder, llvm::StringRef File) {
Benjamin Kramerb1b5b902010-01-09 17:43:21 +000068 Builder.append("#include \"" +
Benjamin Kramera3d8ced2010-01-09 16:17:37 +000069 llvm::Twine(NormalizeDashIncludePath(File)) + "\"");
Chris Lattnere116ccf2009-04-21 05:40:52 +000070}
71
Benjamin Kramera3d8ced2010-01-09 16:17:37 +000072static void AddImplicitIncludeMacros(MacroBuilder &Builder,
73 llvm::StringRef File) {
Benjamin Kramerb1b5b902010-01-09 17:43:21 +000074 Builder.append("#__include_macros \"" +
Benjamin Kramera3d8ced2010-01-09 16:17:37 +000075 llvm::Twine(NormalizeDashIncludePath(File)) + "\"");
Chris Lattnere116ccf2009-04-21 05:40:52 +000076 // Marker token to stop the __include_macros fetch loop.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +000077 Builder.append("##"); // ##?
Chris Lattnere116ccf2009-04-21 05:40:52 +000078}
79
80/// AddImplicitIncludePTH - Add an implicit #include using the original file
81/// used to generate a PTH cache.
Benjamin Kramera3d8ced2010-01-09 16:17:37 +000082static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP,
83 llvm::StringRef ImplicitIncludePTH) {
Chris Lattnere116ccf2009-04-21 05:40:52 +000084 PTHManager *P = PP.getPTHManager();
85 assert(P && "No PTHManager.");
86 const char *OriginalFile = P->getOriginalSourceFile();
Mike Stump1eb44332009-09-09 15:08:12 +000087
Chris Lattnere116ccf2009-04-21 05:40:52 +000088 if (!OriginalFile) {
Daniel Dunbarbaac1032009-12-03 09:14:12 +000089 PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header)
90 << ImplicitIncludePTH;
91 return;
Chris Lattnere116ccf2009-04-21 05:40:52 +000092 }
Mike Stump1eb44332009-09-09 15:08:12 +000093
Benjamin Kramera3d8ced2010-01-09 16:17:37 +000094 AddImplicitInclude(Builder, OriginalFile);
Chris Lattnere116ccf2009-04-21 05:40:52 +000095}
96
97/// PickFP - This is used to pick a value based on the FP semantics of the
98/// specified FP model.
99template <typename T>
100static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal,
Eli Friedman2665a752009-05-23 03:50:01 +0000101 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal,
102 T IEEEQuadVal) {
Duncan Sands63682f92009-06-03 14:28:20 +0000103 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle)
Chris Lattnere116ccf2009-04-21 05:40:52 +0000104 return IEEESingleVal;
Duncan Sands63682f92009-06-03 14:28:20 +0000105 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble)
Chris Lattnere116ccf2009-04-21 05:40:52 +0000106 return IEEEDoubleVal;
Duncan Sands63682f92009-06-03 14:28:20 +0000107 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended)
Chris Lattnere116ccf2009-04-21 05:40:52 +0000108 return X87DoubleExtendedVal;
Duncan Sands63682f92009-06-03 14:28:20 +0000109 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble)
Eli Friedman2665a752009-05-23 03:50:01 +0000110 return PPCDoubleDoubleVal;
Duncan Sands63682f92009-06-03 14:28:20 +0000111 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad);
Eli Friedman2665a752009-05-23 03:50:01 +0000112 return IEEEQuadVal;
Chris Lattnere116ccf2009-04-21 05:40:52 +0000113}
114
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000115static void DefineFloatMacros(MacroBuilder &Builder, llvm::StringRef Prefix,
Chris Lattnere116ccf2009-04-21 05:40:52 +0000116 const llvm::fltSemantics *Sem) {
117 const char *DenormMin, *Epsilon, *Max, *Min;
Mike Stump1eb44332009-09-09 15:08:12 +0000118 DenormMin = PickFP(Sem, "1.40129846e-45F", "4.9406564584124654e-324",
Chris Lattnere116ccf2009-04-21 05:40:52 +0000119 "3.64519953188247460253e-4951L",
Eli Friedman2665a752009-05-23 03:50:01 +0000120 "4.94065645841246544176568792868221e-324L",
121 "6.47517511943802511092443895822764655e-4966L");
122 int Digits = PickFP(Sem, 6, 15, 18, 31, 33);
Chris Lattnere116ccf2009-04-21 05:40:52 +0000123 Epsilon = PickFP(Sem, "1.19209290e-7F", "2.2204460492503131e-16",
124 "1.08420217248550443401e-19L",
Eli Friedman2665a752009-05-23 03:50:01 +0000125 "4.94065645841246544176568792868221e-324L",
126 "1.92592994438723585305597794258492732e-34L");
Eli Friedman2665a752009-05-23 03:50:01 +0000127 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113);
128 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931);
129 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932);
130 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381);
131 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384);
Chris Lattnere116ccf2009-04-21 05:40:52 +0000132 Min = PickFP(Sem, "1.17549435e-38F", "2.2250738585072014e-308",
133 "3.36210314311209350626e-4932L",
Eli Friedman2665a752009-05-23 03:50:01 +0000134 "2.00416836000897277799610805135016e-292L",
135 "3.36210314311209350626267781732175260e-4932L");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000136 Max = PickFP(Sem, "3.40282347e+38F", "1.7976931348623157e+308",
137 "1.18973149535723176502e+4932L",
Eli Friedman2665a752009-05-23 03:50:01 +0000138 "1.79769313486231580793728971405301e+308L",
139 "1.18973149535723176508575932662800702e+4932L");
Mike Stump1eb44332009-09-09 15:08:12 +0000140
Daniel Dunbar066515f2010-01-20 06:09:53 +0000141 llvm::SmallString<32> DefPrefix;
142 DefPrefix = "__";
143 DefPrefix += Prefix;
144 DefPrefix += "_";
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000145
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000146 Builder.defineMacro(DefPrefix + "DENORM_MIN__", DenormMin);
147 Builder.defineMacro(DefPrefix + "HAS_DENORM__");
148 Builder.defineMacro(DefPrefix + "DIG__", llvm::Twine(Digits));
149 Builder.defineMacro(DefPrefix + "EPSILON__", llvm::Twine(Epsilon));
150 Builder.defineMacro(DefPrefix + "HAS_INFINITY__");
151 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__");
152 Builder.defineMacro(DefPrefix + "MANT_DIG__", llvm::Twine(MantissaDigits));
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000153
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000154 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", llvm::Twine(Max10Exp));
155 Builder.defineMacro(DefPrefix + "MAX_EXP__", llvm::Twine(MaxExp));
156 Builder.defineMacro(DefPrefix + "MAX__", llvm::Twine(Max));
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000157
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000158 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+llvm::Twine(Min10Exp)+")");
159 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+llvm::Twine(MinExp)+")");
160 Builder.defineMacro(DefPrefix + "MIN__", llvm::Twine(Min));
Chris Lattnere116ccf2009-04-21 05:40:52 +0000161}
162
163
164/// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro
165/// named MacroName with the max value for a type with width 'TypeWidth' a
166/// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL).
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000167static void DefineTypeSize(llvm::StringRef MacroName, unsigned TypeWidth,
168 llvm::StringRef ValSuffix, bool isSigned,
169 MacroBuilder& Builder) {
Chris Lattnere116ccf2009-04-21 05:40:52 +0000170 long long MaxVal;
171 if (isSigned)
172 MaxVal = (1LL << (TypeWidth - 1)) - 1;
173 else
174 MaxVal = ~0LL >> (64-TypeWidth);
Mike Stump1eb44332009-09-09 15:08:12 +0000175
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000176 Builder.defineMacro(MacroName, llvm::Twine(MaxVal) + ValSuffix);
Chris Lattnere116ccf2009-04-21 05:40:52 +0000177}
178
Chris Lattner9099e7b2009-11-05 21:21:32 +0000179/// DefineTypeSize - An overloaded helper that uses TargetInfo to determine
180/// the width, suffix, and signedness of the given type
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000181static void DefineTypeSize(llvm::StringRef MacroName, TargetInfo::IntType Ty,
182 const TargetInfo &TI, MacroBuilder &Builder) {
Chris Lattner9099e7b2009-11-05 21:21:32 +0000183 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty),
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000184 TI.isTypeSigned(Ty), Builder);
Chris Lattner9099e7b2009-11-05 21:21:32 +0000185}
186
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000187static void DefineType(const llvm::Twine &MacroName, TargetInfo::IntType Ty,
188 MacroBuilder &Builder) {
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000189 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty));
Chris Lattnere116ccf2009-04-21 05:40:52 +0000190}
191
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000192static void DefineTypeWidth(llvm::StringRef MacroName, TargetInfo::IntType Ty,
193 const TargetInfo &TI, MacroBuilder &Builder) {
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000194 Builder.defineMacro(MacroName, llvm::Twine(TI.getTypeWidth(Ty)));
Ken Dyck186696b2009-11-18 13:52:57 +0000195}
196
Chris Lattnerdcdd2a02009-11-12 08:08:27 +0000197static void DefineExactWidthIntType(TargetInfo::IntType Ty,
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000198 const TargetInfo &TI, MacroBuilder &Builder) {
Ken Dyckeef22ef2009-11-16 16:36:33 +0000199 int TypeWidth = TI.getTypeWidth(Ty);
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000200 DefineType("__INT" + llvm::Twine(TypeWidth) + "_TYPE__", Ty, Builder);
Ken Dyckeef22ef2009-11-16 16:36:33 +0000201
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000202 llvm::StringRef ConstSuffix(TargetInfo::getTypeConstantSuffix(Ty));
203 if (!ConstSuffix.empty())
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000204 Builder.defineMacro("__INT" + llvm::Twine(TypeWidth) + "_C_SUFFIX__",
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000205 ConstSuffix);
Chris Lattnerdcdd2a02009-11-12 08:08:27 +0000206}
Chris Lattnere116ccf2009-04-21 05:40:52 +0000207
208static void InitializePredefinedMacros(const TargetInfo &TI,
209 const LangOptions &LangOpts,
Fariborz Jahanian7d957472010-01-13 18:51:17 +0000210 const FrontendOptions &FEOpts,
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000211 MacroBuilder &Builder) {
Chris Lattnere116ccf2009-04-21 05:40:52 +0000212 // Compiler version introspection macros.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000213 Builder.defineMacro("__llvm__"); // LLVM Backend
214 Builder.defineMacro("__clang__"); // Clang Frontend
Mike Stump1eb44332009-09-09 15:08:12 +0000215
Chris Lattnere116ccf2009-04-21 05:40:52 +0000216 // Currently claim to be compatible with GCC 4.2.1-5621.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000217 Builder.defineMacro("__GNUC_MINOR__", "2");
218 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1");
219 Builder.defineMacro("__GNUC__", "4");
220 Builder.defineMacro("__GXX_ABI_VERSION", "1002");
221 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible Clang Compiler\"");
Mike Stump1eb44332009-09-09 15:08:12 +0000222
Chris Lattnere116ccf2009-04-21 05:40:52 +0000223 // Initialize language-specific preprocessor defines.
Mike Stump1eb44332009-09-09 15:08:12 +0000224
Chris Lattnere116ccf2009-04-21 05:40:52 +0000225 // These should all be defined in the preprocessor according to the
226 // current language configuration.
227 if (!LangOpts.Microsoft)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000228 Builder.defineMacro("__STDC__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000229 if (LangOpts.AsmPreprocessor)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000230 Builder.defineMacro("__ASSEMBLER__");
Ryan Flynn07ef8042009-07-21 00:07:02 +0000231
232 if (!LangOpts.CPlusPlus) {
233 if (LangOpts.C99)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000234 Builder.defineMacro("__STDC_VERSION__", "199901L");
Ryan Flynn07ef8042009-07-21 00:07:02 +0000235 else if (!LangOpts.GNUMode && LangOpts.Digraphs)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000236 Builder.defineMacro("__STDC_VERSION__", "199409L");
Ryan Flynn07ef8042009-07-21 00:07:02 +0000237 }
Chris Lattnere116ccf2009-04-21 05:40:52 +0000238
239 // Standard conforming mode?
240 if (!LangOpts.GNUMode)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000241 Builder.defineMacro("__STRICT_ANSI__");
Mike Stump1eb44332009-09-09 15:08:12 +0000242
Chris Lattnere116ccf2009-04-21 05:40:52 +0000243 if (LangOpts.CPlusPlus0x)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000244 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000245
246 if (LangOpts.Freestanding)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000247 Builder.defineMacro("__STDC_HOSTED__", "0");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000248 else
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000249 Builder.defineMacro("__STDC_HOSTED__");
Mike Stump1eb44332009-09-09 15:08:12 +0000250
Chris Lattnere116ccf2009-04-21 05:40:52 +0000251 if (LangOpts.ObjC1) {
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000252 Builder.defineMacro("__OBJC__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000253 if (LangOpts.ObjCNonFragileABI) {
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000254 Builder.defineMacro("__OBJC2__");
255 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000256 }
257
258 if (LangOpts.getGCMode() != LangOptions::NonGC)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000259 Builder.defineMacro("__OBJC_GC__");
Mike Stump1eb44332009-09-09 15:08:12 +0000260
Chris Lattnere116ccf2009-04-21 05:40:52 +0000261 if (LangOpts.NeXTRuntime)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000262 Builder.defineMacro("__NEXT_RUNTIME__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000263 }
Mike Stump1eb44332009-09-09 15:08:12 +0000264
Chris Lattnere116ccf2009-04-21 05:40:52 +0000265 // darwin_constant_cfstrings controls this. This is also dependent
266 // on other things like the runtime I believe. This is set even for C code.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000267 Builder.defineMacro("__CONSTANT_CFSTRINGS__");
Mike Stump1eb44332009-09-09 15:08:12 +0000268
Chris Lattnere116ccf2009-04-21 05:40:52 +0000269 if (LangOpts.ObjC2)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000270 Builder.defineMacro("OBJC_NEW_PROPERTIES");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000271
272 if (LangOpts.PascalStrings)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000273 Builder.defineMacro("__PASCAL_STRINGS__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000274
275 if (LangOpts.Blocks) {
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000276 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))");
277 Builder.defineMacro("__BLOCKS__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000278 }
Mike Stump1eb44332009-09-09 15:08:12 +0000279
Rafael Espindolaf759df02009-10-01 13:33:33 +0000280 if (LangOpts.Exceptions)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000281 Builder.defineMacro("__EXCEPTIONS");
Daniel Dunbarb2987d12010-02-10 18:49:11 +0000282 if (LangOpts.SjLjExceptions)
283 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__");
Rafael Espindolaf759df02009-10-01 13:33:33 +0000284
Chris Lattnere116ccf2009-04-21 05:40:52 +0000285 if (LangOpts.CPlusPlus) {
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000286 Builder.defineMacro("__DEPRECATED");
287 Builder.defineMacro("__GNUG__", "4");
288 Builder.defineMacro("__GXX_WEAK__");
Douglas Gregor36dd1312009-08-06 04:09:28 +0000289 if (LangOpts.GNUMode)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000290 Builder.defineMacro("__cplusplus");
Mike Stump1eb44332009-09-09 15:08:12 +0000291 else
Douglas Gregor36dd1312009-08-06 04:09:28 +0000292 // C++ [cpp.predefined]p1:
Mike Stump1eb44332009-09-09 15:08:12 +0000293 // The name_ _cplusplusis defined to the value199711Lwhen compiling a
Douglas Gregor36dd1312009-08-06 04:09:28 +0000294 // C++ translation unit.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000295 Builder.defineMacro("__cplusplus", "199711L");
296 Builder.defineMacro("__private_extern__", "extern");
Douglas Gregor66791df2010-04-16 06:31:05 +0000297
298 // Define _GNU_SOURCE on platforms where we expect to use glibc.
299 switch (TI.getTriple().getOS()) {
300 case llvm::Triple::Cygwin:
301 case llvm::Triple::MinGW64:
302 case llvm::Triple::MinGW32:
303 case llvm::Triple::Linux:
304 case llvm::Triple::Solaris:
305 case llvm::Triple::AuroraUX:
306 Builder.defineMacro("_GNU_SOURCE");
307 break;
308
309 case llvm::Triple::Darwin:
310 case llvm::Triple::DragonFly:
311 case llvm::Triple::FreeBSD:
312 case llvm::Triple::UnknownOS:
313 case llvm::Triple::Lv2:
314 case llvm::Triple::NetBSD:
315 case llvm::Triple::OpenBSD:
316 case llvm::Triple::Psp:
317 case llvm::Triple::Win32:
318 case llvm::Triple::Haiku:
319 break;
320 }
Chris Lattnere116ccf2009-04-21 05:40:52 +0000321 }
Mike Stump1eb44332009-09-09 15:08:12 +0000322
Chris Lattnere116ccf2009-04-21 05:40:52 +0000323 if (LangOpts.Microsoft) {
John Thompson24ee8042009-10-16 01:12:00 +0000324 // Filter out some microsoft extensions when trying to parse in ms-compat
325 // mode.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000326 Builder.defineMacro("__int8", "__INT8_TYPE__");
327 Builder.defineMacro("__int16", "__INT16_TYPE__");
328 Builder.defineMacro("__int32", "__INT32_TYPE__");
329 Builder.defineMacro("__int64", "__INT64_TYPE__");
Steve Narofffdd6aaf2009-12-04 21:29:41 +0000330 // Both __PRETTY_FUNCTION__ and __FUNCTION__ are GCC extensions, however
331 // VC++ appears to only like __FUNCTION__.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000332 Builder.defineMacro("__PRETTY_FUNCTION__", "__FUNCTION__");
John Thompson24ee8042009-10-16 01:12:00 +0000333 // Work around some issues with Visual C++ headerws.
334 if (LangOpts.CPlusPlus) {
335 // Since we define wchar_t in C++ mode.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000336 Builder.defineMacro("_WCHAR_T_DEFINED");
337 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED");
John Thompson24ee8042009-10-16 01:12:00 +0000338 // FIXME: This should be temporary until we have a __pragma
339 // solution, to avoid some errors flagged in VC++ headers.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000340 Builder.defineMacro("_CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES", "0");
John Thompson24ee8042009-10-16 01:12:00 +0000341 }
Chris Lattnere116ccf2009-04-21 05:40:52 +0000342 }
Mike Stump1eb44332009-09-09 15:08:12 +0000343
Chris Lattnere116ccf2009-04-21 05:40:52 +0000344 if (LangOpts.Optimize)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000345 Builder.defineMacro("__OPTIMIZE__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000346 if (LangOpts.OptimizeSize)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000347 Builder.defineMacro("__OPTIMIZE_SIZE__");
Mike Stump1eb44332009-09-09 15:08:12 +0000348
Chris Lattnere116ccf2009-04-21 05:40:52 +0000349 // Initialize target-specific preprocessor defines.
Mike Stump1eb44332009-09-09 15:08:12 +0000350
Chris Lattnere116ccf2009-04-21 05:40:52 +0000351 // Define type sizing macros based on the target properties.
352 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far");
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000353 Builder.defineMacro("__CHAR_BIT__", "8");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000354
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000355 DefineTypeSize("__SCHAR_MAX__", TI.getCharWidth(), "", true, Builder);
356 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder);
357 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder);
358 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder);
359 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder);
360 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder);
361 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder);
Chris Lattnere116ccf2009-04-21 05:40:52 +0000362
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000363 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder);
364 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder);
365 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder);
366 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder);
367 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder);
368 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder);
369 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder);
370 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder);
371 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder);
372 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder);
373 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder);
374 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder);
375 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder);
376 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder);
Mike Stump1eb44332009-09-09 15:08:12 +0000377
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000378 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat());
379 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat());
380 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat());
Chris Lattnere116ccf2009-04-21 05:40:52 +0000381
382 // Define a __POINTER_WIDTH__ macro for stdint.h.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000383 Builder.defineMacro("__POINTER_WIDTH__",
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000384 llvm::Twine((int)TI.getPointerWidth(0)));
Mike Stump1eb44332009-09-09 15:08:12 +0000385
Eli Friedman15b91762009-06-05 07:05:05 +0000386 if (!LangOpts.CharIsSigned)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000387 Builder.defineMacro("__CHAR_UNSIGNED__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000388
Chris Lattnerdcdd2a02009-11-12 08:08:27 +0000389 // Define exact-width integer types for stdint.h
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000390 Builder.defineMacro("__INT" + llvm::Twine(TI.getCharWidth()) + "_TYPE__",
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000391 "char");
Mike Stump1eb44332009-09-09 15:08:12 +0000392
Chris Lattnerdcdd2a02009-11-12 08:08:27 +0000393 if (TI.getShortWidth() > TI.getCharWidth())
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000394 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder);
Mike Stump1eb44332009-09-09 15:08:12 +0000395
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000396 if (TI.getIntWidth() > TI.getShortWidth())
397 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder);
398
399 if (TI.getLongWidth() > TI.getIntWidth())
400 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder);
401
402 if (TI.getLongLongWidth() > TI.getLongWidth())
403 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder);
404
405 // Add __builtin_va_list typedef.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000406 Builder.append(TI.getVAListDeclaration());
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000407
408 if (const char *Prefix = TI.getUserLabelPrefix())
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000409 Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix);
Mike Stump1eb44332009-09-09 15:08:12 +0000410
Chris Lattnere116ccf2009-04-21 05:40:52 +0000411 // Build configuration options. FIXME: these should be controlled by
412 // command line options or something.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000413 Builder.defineMacro("__FINITE_MATH_ONLY__", "0");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000414
Chris Lattnere116ccf2009-04-21 05:40:52 +0000415 if (LangOpts.GNUInline)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000416 Builder.defineMacro("__GNUC_GNU_INLINE__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000417 else
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000418 Builder.defineMacro("__GNUC_STDC_INLINE__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000419
420 if (LangOpts.NoInline)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000421 Builder.defineMacro("__NO_INLINE__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000422
423 if (unsigned PICLevel = LangOpts.PICLevel) {
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000424 Builder.defineMacro("__PIC__", llvm::Twine(PICLevel));
425 Builder.defineMacro("__pic__", llvm::Twine(PICLevel));
Chris Lattnere116ccf2009-04-21 05:40:52 +0000426 }
427
428 // Macros to control C99 numerics and <float.h>
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000429 Builder.defineMacro("__FLT_EVAL_METHOD__", "0");
430 Builder.defineMacro("__FLT_RADIX__", "2");
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000431 int Dig = PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36);
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000432 Builder.defineMacro("__DECIMAL_DIG__", llvm::Twine(Dig));
Bill Wendling45483f72009-06-28 07:36:13 +0000433
Bill Wendling4ebe3e42009-06-28 23:01:01 +0000434 if (LangOpts.getStackProtectorMode() == LangOptions::SSPOn)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000435 Builder.defineMacro("__SSP__");
Bill Wendling4ebe3e42009-06-28 23:01:01 +0000436 else if (LangOpts.getStackProtectorMode() == LangOptions::SSPReq)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000437 Builder.defineMacro("__SSP_ALL__", "2");
Bill Wendling45483f72009-06-28 07:36:13 +0000438
Fariborz Jahanian7d957472010-01-13 18:51:17 +0000439 if (FEOpts.ProgramAction == frontend::RewriteObjC)
440 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000441 // Get other target #defines.
Benjamin Kramera9992772010-01-09 17:55:51 +0000442 TI.getTargetDefines(LangOpts, Builder);
Chris Lattnere116ccf2009-04-21 05:40:52 +0000443}
444
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000445// Initialize the remapping of files to alternative contents, e.g.,
446// those specified through other files.
447static void InitializeFileRemapping(Diagnostic &Diags,
448 SourceManager &SourceMgr,
449 FileManager &FileMgr,
450 const PreprocessorOptions &InitOpts) {
Douglas Gregor4db64a42010-01-23 00:14:00 +0000451 // Remap files in the source manager (with buffers).
452 for (PreprocessorOptions::remapped_file_buffer_iterator
453 Remap = InitOpts.remapped_file_buffer_begin(),
454 RemapEnd = InitOpts.remapped_file_buffer_end();
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000455 Remap != RemapEnd;
456 ++Remap) {
Douglas Gregor057e5672009-12-02 18:12:28 +0000457 // Create the file entry for the file that we're mapping from.
458 const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first,
Douglas Gregor4db64a42010-01-23 00:14:00 +0000459 Remap->second->getBufferSize(),
Douglas Gregor057e5672009-12-02 18:12:28 +0000460 0);
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000461 if (!FromFile) {
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000462 Diags.Report(diag::err_fe_remap_missing_from_file)
463 << Remap->first;
Douglas Gregorc8dfe5e2010-02-27 01:32:48 +0000464 delete Remap->second;
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000465 continue;
466 }
467
Douglas Gregor4db64a42010-01-23 00:14:00 +0000468 // Override the contents of the "from" file with the contents of
469 // the "to" file.
470 SourceMgr.overrideFileContents(FromFile, Remap->second);
471 }
472
473 // Remap files in the source manager (with other files).
474 for (PreprocessorOptions::remapped_file_iterator
475 Remap = InitOpts.remapped_file_begin(),
476 RemapEnd = InitOpts.remapped_file_end();
477 Remap != RemapEnd;
478 ++Remap) {
479 // Find the file that we're mapping to.
480 const FileEntry *ToFile = FileMgr.getFile(Remap->second);
481 if (!ToFile) {
482 Diags.Report(diag::err_fe_remap_missing_to_file)
483 << Remap->first << Remap->second;
484 continue;
485 }
486
487 // Create the file entry for the file that we're mapping from.
488 const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first,
489 ToFile->getSize(),
490 0);
491 if (!FromFile) {
492 Diags.Report(diag::err_fe_remap_missing_from_file)
493 << Remap->first;
494 continue;
495 }
496
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000497 // Load the contents of the file we're mapping to.
498 std::string ErrorStr;
499 const llvm::MemoryBuffer *Buffer
Douglas Gregor4db64a42010-01-23 00:14:00 +0000500 = llvm::MemoryBuffer::getFile(ToFile->getName(), &ErrorStr);
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000501 if (!Buffer) {
502 Diags.Report(diag::err_fe_error_opening)
Douglas Gregorc8dfe5e2010-02-27 01:32:48 +0000503 << Remap->second << ErrorStr;
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000504 continue;
505 }
Douglas Gregor4db64a42010-01-23 00:14:00 +0000506
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000507 // Override the contents of the "from" file with the contents of
508 // the "to" file.
509 SourceMgr.overrideFileContents(FromFile, Buffer);
510 }
511}
512
Chris Lattnere116ccf2009-04-21 05:40:52 +0000513/// InitializePreprocessor - Initialize the preprocessor getting it and the
514/// environment ready to process a single file. This returns true on error.
515///
Daniel Dunbar938963f2009-11-04 21:13:15 +0000516void clang::InitializePreprocessor(Preprocessor &PP,
Daniel Dunbar961c76e2009-11-11 21:44:42 +0000517 const PreprocessorOptions &InitOpts,
Fariborz Jahanian7d957472010-01-13 18:51:17 +0000518 const HeaderSearchOptions &HSOpts,
519 const FrontendOptions &FEOpts) {
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000520 std::string PredefineBuffer;
521 PredefineBuffer.reserve(4080);
522 llvm::raw_string_ostream Predefines(PredefineBuffer);
523 MacroBuilder Builder(Predefines);
Mike Stump1eb44332009-09-09 15:08:12 +0000524
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000525 InitializeFileRemapping(PP.getDiagnostics(), PP.getSourceManager(),
526 PP.getFileManager(), InitOpts);
527
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000528 Builder.append("# 1 \"<built-in>\" 3");
Mike Stump1eb44332009-09-09 15:08:12 +0000529
Chris Lattnere116ccf2009-04-21 05:40:52 +0000530 // Install things like __POWERPC__, __GNUC__, etc into the macro table.
Daniel Dunbar049d3a02009-11-17 05:52:41 +0000531 if (InitOpts.UsePredefines)
Chris Lattnere6113de2009-11-03 19:50:27 +0000532 InitializePredefinedMacros(PP.getTargetInfo(), PP.getLangOptions(),
Fariborz Jahanian7d957472010-01-13 18:51:17 +0000533 FEOpts, Builder);
Mike Stump1eb44332009-09-09 15:08:12 +0000534
Chris Lattnere116ccf2009-04-21 05:40:52 +0000535 // Add on the predefines from the driver. Wrap in a #line directive to report
536 // that they come from the command line.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000537 Builder.append("# 1 \"<command line>\" 1");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000538
539 // Process #define's and #undef's in the order they are given.
Daniel Dunbar049d3a02009-11-17 05:52:41 +0000540 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) {
541 if (InitOpts.Macros[i].second) // isUndef
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000542 Builder.undefineMacro(InitOpts.Macros[i].first);
Chris Lattner62f86c42009-04-21 06:00:24 +0000543 else
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000544 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first,
Daniel Dunbar1ee4b9e2010-01-10 00:46:21 +0000545 PP.getDiagnostics());
Chris Lattnere116ccf2009-04-21 05:40:52 +0000546 }
547
548 // If -imacros are specified, include them now. These are processed before
549 // any -include directives.
Daniel Dunbar049d3a02009-11-17 05:52:41 +0000550 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000551 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]);
Chris Lattnere116ccf2009-04-21 05:40:52 +0000552
553 // Process -include directives.
Daniel Dunbar049d3a02009-11-17 05:52:41 +0000554 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
555 const std::string &Path = InitOpts.Includes[i];
556 if (Path == InitOpts.ImplicitPTHInclude)
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000557 AddImplicitIncludePTH(Builder, PP, Path);
Chris Lattner62f86c42009-04-21 06:00:24 +0000558 else
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000559 AddImplicitInclude(Builder, Path);
Eli Friedmanae96a962009-06-15 09:57:52 +0000560 }
Chris Lattnere116ccf2009-04-21 05:40:52 +0000561
Rafael Espindola0259d202009-12-01 18:28:16 +0000562 // Exit the command line and go back to <built-in> (2 is LC_LEAVE).
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000563 Builder.append("# 1 \"<built-in>\" 2");
Rafael Espindola0259d202009-12-01 18:28:16 +0000564
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000565 // Copy PredefinedBuffer into the Preprocessor.
566 PP.setPredefines(Predefines.str());
Daniel Dunbar961c76e2009-11-11 21:44:42 +0000567
568 // Initialize the header search object.
569 ApplyHeaderSearchOptions(PP.getHeaderSearchInfo(), HSOpts,
570 PP.getLangOptions(),
571 PP.getTargetInfo().getTriple());
Chris Lattnere116ccf2009-04-21 05:40:52 +0000572}