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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
Douglas Gregor4290fbd2010-04-30 02:51:06 +000014#include "clang/Basic/Version.h"
Daniel Dunbar8863b982009-11-07 04:20:15 +000015#include "clang/Frontend/Utils.h"
Chandler Carruth103b71c2010-01-20 06:13:02 +000016#include "clang/Basic/MacroBuilder.h"
Chris Lattnere116ccf2009-04-21 05:40:52 +000017#include "clang/Basic/TargetInfo.h"
Douglas Gregor2973c0e2009-12-02 16:32:41 +000018#include "clang/Frontend/FrontendDiagnostic.h"
Fariborz Jahanian7d957472010-01-13 18:51:17 +000019#include "clang/Frontend/FrontendOptions.h"
Daniel Dunbar8863b982009-11-07 04:20:15 +000020#include "clang/Frontend/PreprocessorOptions.h"
Chandler Carruthcb381ea2011-12-09 01:33:57 +000021#include "clang/Lex/HeaderSearch.h"
Chris Lattnere116ccf2009-04-21 05:40:52 +000022#include "clang/Lex/Preprocessor.h"
Douglas Gregor2973c0e2009-12-02 16:32:41 +000023#include "clang/Basic/FileManager.h"
24#include "clang/Basic/SourceManager.h"
Benjamin Kramera3d8ced2010-01-09 16:17:37 +000025#include "llvm/ADT/APFloat.h"
Michael J. Spencerfbfd1802010-12-21 16:45:57 +000026#include "llvm/Support/FileSystem.h"
Douglas Gregor2973c0e2009-12-02 16:32:41 +000027#include "llvm/Support/MemoryBuffer.h"
Michael J. Spencer03013fa2010-11-29 18:12:39 +000028#include "llvm/Support/Path.h"
Chris Lattner47c06ee2009-11-02 21:48:09 +000029using namespace clang;
Chris Lattnere116ccf2009-04-21 05:40:52 +000030
31// Append a #define line to Buf for Macro. Macro should be of the form XXX,
32// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
33// "#define XXX Y z W". To get a #define with no value, use "XXX=".
Chris Lattner5f9e2722011-07-23 10:55:15 +000034static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro,
David Blaikied6471f72011-09-25 23:23:43 +000035 DiagnosticsEngine &Diags) {
Chris Lattner5f9e2722011-07-23 10:55:15 +000036 std::pair<StringRef, StringRef> MacroPair = Macro.split('=');
37 StringRef MacroName = MacroPair.first;
38 StringRef MacroBody = MacroPair.second;
Daniel Dunbar1ee4b9e2010-01-10 00:46:21 +000039 if (MacroName.size() != Macro.size()) {
Chris Lattnere116ccf2009-04-21 05:40:52 +000040 // Per GCC -D semantics, the macro ends at \n if it exists.
Chris Lattner5f9e2722011-07-23 10:55:15 +000041 StringRef::size_type End = MacroBody.find_first_of("\n\r");
42 if (End != StringRef::npos)
Daniel Dunbar1ee4b9e2010-01-10 00:46:21 +000043 Diags.Report(diag::warn_fe_macro_contains_embedded_newline)
Kovarththanan Rajaratnam8746e4e2010-01-09 09:27:11 +000044 << MacroName;
Benjamin Kramerb1b5b902010-01-09 17:43:21 +000045 Builder.defineMacro(MacroName, MacroBody.substr(0, End));
Chris Lattnere116ccf2009-04-21 05:40:52 +000046 } else {
47 // Push "macroname 1".
Benjamin Kramerb1b5b902010-01-09 17:43:21 +000048 Builder.defineMacro(Macro);
Chris Lattnere116ccf2009-04-21 05:40:52 +000049 }
Chris Lattnerdcdecf42009-05-15 16:08:43 +000050}
51
Chris Lattnere116ccf2009-04-21 05:40:52 +000052/// AddImplicitInclude - Add an implicit #include of the specified file to the
53/// predefines buffer.
Chris Lattner5f9e2722011-07-23 10:55:15 +000054static void AddImplicitInclude(MacroBuilder &Builder, StringRef File,
Nick Lewycky277a6e72011-02-23 21:16:44 +000055 FileManager &FileMgr) {
Chandler Carruthcb381ea2011-12-09 01:33:57 +000056 Builder.append(Twine("#include \"") +
57 HeaderSearch::NormalizeDashIncludePath(File, FileMgr) + "\"");
Chris Lattnere116ccf2009-04-21 05:40:52 +000058}
59
Benjamin Kramera3d8ced2010-01-09 16:17:37 +000060static void AddImplicitIncludeMacros(MacroBuilder &Builder,
Chris Lattner5f9e2722011-07-23 10:55:15 +000061 StringRef File,
Nick Lewycky277a6e72011-02-23 21:16:44 +000062 FileManager &FileMgr) {
Chandler Carruthcb381ea2011-12-09 01:33:57 +000063 Builder.append(Twine("#__include_macros \"") +
64 HeaderSearch::NormalizeDashIncludePath(File, FileMgr) + "\"");
Chris Lattnere116ccf2009-04-21 05:40:52 +000065 // Marker token to stop the __include_macros fetch loop.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +000066 Builder.append("##"); // ##?
Chris Lattnere116ccf2009-04-21 05:40:52 +000067}
68
69/// AddImplicitIncludePTH - Add an implicit #include using the original file
70/// used to generate a PTH cache.
Benjamin Kramera3d8ced2010-01-09 16:17:37 +000071static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP,
Chris Lattner5f9e2722011-07-23 10:55:15 +000072 StringRef ImplicitIncludePTH) {
Chris Lattnere116ccf2009-04-21 05:40:52 +000073 PTHManager *P = PP.getPTHManager();
Ted Kremenek4ae4c912010-06-28 20:32:40 +000074 // Null check 'P' in the corner case where it couldn't be created.
75 const char *OriginalFile = P ? P->getOriginalSourceFile() : 0;
Mike Stump1eb44332009-09-09 15:08:12 +000076
Chris Lattnere116ccf2009-04-21 05:40:52 +000077 if (!OriginalFile) {
Daniel Dunbarbaac1032009-12-03 09:14:12 +000078 PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header)
79 << ImplicitIncludePTH;
80 return;
Chris Lattnere116ccf2009-04-21 05:40:52 +000081 }
Mike Stump1eb44332009-09-09 15:08:12 +000082
Nick Lewycky277a6e72011-02-23 21:16:44 +000083 AddImplicitInclude(Builder, OriginalFile, PP.getFileManager());
Chris Lattnere116ccf2009-04-21 05:40:52 +000084}
85
86/// PickFP - This is used to pick a value based on the FP semantics of the
87/// specified FP model.
88template <typename T>
89static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal,
Eli Friedman2665a752009-05-23 03:50:01 +000090 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal,
91 T IEEEQuadVal) {
Duncan Sands63682f92009-06-03 14:28:20 +000092 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle)
Chris Lattnere116ccf2009-04-21 05:40:52 +000093 return IEEESingleVal;
Duncan Sands63682f92009-06-03 14:28:20 +000094 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble)
Chris Lattnere116ccf2009-04-21 05:40:52 +000095 return IEEEDoubleVal;
Duncan Sands63682f92009-06-03 14:28:20 +000096 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended)
Chris Lattnere116ccf2009-04-21 05:40:52 +000097 return X87DoubleExtendedVal;
Duncan Sands63682f92009-06-03 14:28:20 +000098 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble)
Eli Friedman2665a752009-05-23 03:50:01 +000099 return PPCDoubleDoubleVal;
Duncan Sands63682f92009-06-03 14:28:20 +0000100 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad);
Eli Friedman2665a752009-05-23 03:50:01 +0000101 return IEEEQuadVal;
Chris Lattnere116ccf2009-04-21 05:40:52 +0000102}
103
Chris Lattner5f9e2722011-07-23 10:55:15 +0000104static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix,
Chris Lattnere116ccf2009-04-21 05:40:52 +0000105 const llvm::fltSemantics *Sem) {
106 const char *DenormMin, *Epsilon, *Max, *Min;
Mike Stump1eb44332009-09-09 15:08:12 +0000107 DenormMin = PickFP(Sem, "1.40129846e-45F", "4.9406564584124654e-324",
Chris Lattnere116ccf2009-04-21 05:40:52 +0000108 "3.64519953188247460253e-4951L",
Eli Friedman2665a752009-05-23 03:50:01 +0000109 "4.94065645841246544176568792868221e-324L",
110 "6.47517511943802511092443895822764655e-4966L");
111 int Digits = PickFP(Sem, 6, 15, 18, 31, 33);
Chris Lattnere116ccf2009-04-21 05:40:52 +0000112 Epsilon = PickFP(Sem, "1.19209290e-7F", "2.2204460492503131e-16",
113 "1.08420217248550443401e-19L",
Eli Friedman2665a752009-05-23 03:50:01 +0000114 "4.94065645841246544176568792868221e-324L",
115 "1.92592994438723585305597794258492732e-34L");
Eli Friedman2665a752009-05-23 03:50:01 +0000116 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113);
117 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931);
118 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932);
119 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381);
120 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384);
Chris Lattnere116ccf2009-04-21 05:40:52 +0000121 Min = PickFP(Sem, "1.17549435e-38F", "2.2250738585072014e-308",
122 "3.36210314311209350626e-4932L",
Eli Friedman2665a752009-05-23 03:50:01 +0000123 "2.00416836000897277799610805135016e-292L",
124 "3.36210314311209350626267781732175260e-4932L");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000125 Max = PickFP(Sem, "3.40282347e+38F", "1.7976931348623157e+308",
126 "1.18973149535723176502e+4932L",
Eli Friedman2665a752009-05-23 03:50:01 +0000127 "1.79769313486231580793728971405301e+308L",
128 "1.18973149535723176508575932662800702e+4932L");
Mike Stump1eb44332009-09-09 15:08:12 +0000129
Dylan Noblesmithf7ccbad2012-02-05 02:13:05 +0000130 SmallString<32> DefPrefix;
Daniel Dunbar066515f2010-01-20 06:09:53 +0000131 DefPrefix = "__";
132 DefPrefix += Prefix;
133 DefPrefix += "_";
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000134
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000135 Builder.defineMacro(DefPrefix + "DENORM_MIN__", DenormMin);
136 Builder.defineMacro(DefPrefix + "HAS_DENORM__");
Chris Lattner5f9e2722011-07-23 10:55:15 +0000137 Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits));
138 Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon));
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000139 Builder.defineMacro(DefPrefix + "HAS_INFINITY__");
140 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__");
Chris Lattner5f9e2722011-07-23 10:55:15 +0000141 Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits));
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000142
Chris Lattner5f9e2722011-07-23 10:55:15 +0000143 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp));
144 Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp));
145 Builder.defineMacro(DefPrefix + "MAX__", Twine(Max));
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000146
Chris Lattner5f9e2722011-07-23 10:55:15 +0000147 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")");
148 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")");
149 Builder.defineMacro(DefPrefix + "MIN__", Twine(Min));
Chris Lattnere116ccf2009-04-21 05:40:52 +0000150}
151
152
153/// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro
154/// named MacroName with the max value for a type with width 'TypeWidth' a
155/// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL).
Chris Lattner5f9e2722011-07-23 10:55:15 +0000156static void DefineTypeSize(StringRef MacroName, unsigned TypeWidth,
157 StringRef ValSuffix, bool isSigned,
Chris Lattnerd7f758c2011-02-24 06:54:56 +0000158 MacroBuilder &Builder) {
159 llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth)
160 : llvm::APInt::getMaxValue(TypeWidth);
161 Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix);
Chris Lattnere116ccf2009-04-21 05:40:52 +0000162}
163
Chris Lattner9099e7b2009-11-05 21:21:32 +0000164/// DefineTypeSize - An overloaded helper that uses TargetInfo to determine
165/// the width, suffix, and signedness of the given type
Chris Lattner5f9e2722011-07-23 10:55:15 +0000166static void DefineTypeSize(StringRef MacroName, TargetInfo::IntType Ty,
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000167 const TargetInfo &TI, MacroBuilder &Builder) {
Chris Lattner9099e7b2009-11-05 21:21:32 +0000168 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty),
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000169 TI.isTypeSigned(Ty), Builder);
Chris Lattner9099e7b2009-11-05 21:21:32 +0000170}
171
Chris Lattner5f9e2722011-07-23 10:55:15 +0000172static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty,
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000173 MacroBuilder &Builder) {
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000174 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty));
Chris Lattnere116ccf2009-04-21 05:40:52 +0000175}
176
Chris Lattner5f9e2722011-07-23 10:55:15 +0000177static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty,
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000178 const TargetInfo &TI, MacroBuilder &Builder) {
Chris Lattner5f9e2722011-07-23 10:55:15 +0000179 Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty)));
Ken Dyck186696b2009-11-18 13:52:57 +0000180}
181
Chris Lattner5f9e2722011-07-23 10:55:15 +0000182static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth,
Dan Gohmancfeac342010-05-28 00:27:15 +0000183 const TargetInfo &TI, MacroBuilder &Builder) {
184 Builder.defineMacro(MacroName,
Chris Lattner5f9e2722011-07-23 10:55:15 +0000185 Twine(BitWidth / TI.getCharWidth()));
Dan Gohmancfeac342010-05-28 00:27:15 +0000186}
187
Chris Lattnerdcdd2a02009-11-12 08:08:27 +0000188static void DefineExactWidthIntType(TargetInfo::IntType Ty,
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000189 const TargetInfo &TI, MacroBuilder &Builder) {
Ken Dyckeef22ef2009-11-16 16:36:33 +0000190 int TypeWidth = TI.getTypeWidth(Ty);
Daniel Dunbar7f3a5452010-06-30 06:30:56 +0000191
192 // Use the target specified int64 type, when appropriate, so that [u]int64_t
193 // ends up being defined in terms of the correct type.
194 if (TypeWidth == 64)
195 Ty = TI.getInt64Type();
196
Chris Lattner5f9e2722011-07-23 10:55:15 +0000197 DefineType("__INT" + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
Ken Dyckeef22ef2009-11-16 16:36:33 +0000198
Chris Lattner5f9e2722011-07-23 10:55:15 +0000199 StringRef ConstSuffix(TargetInfo::getTypeConstantSuffix(Ty));
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000200 if (!ConstSuffix.empty())
Chris Lattner5f9e2722011-07-23 10:55:15 +0000201 Builder.defineMacro("__INT" + Twine(TypeWidth) + "_C_SUFFIX__",
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000202 ConstSuffix);
Chris Lattnerdcdd2a02009-11-12 08:08:27 +0000203}
Chris Lattnere116ccf2009-04-21 05:40:52 +0000204
Richard Smith2c39d712012-04-13 00:45:38 +0000205/// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with
206/// the specified properties.
207static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign,
208 unsigned InlineWidth) {
209 // Fully-aligned, power-of-2 sizes no larger than the inline
210 // width will be inlined as lock-free operations.
211 if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 &&
212 TypeWidth <= InlineWidth)
213 return "2"; // "always lock free"
214 // We cannot be certain what operations the lib calls might be
215 // able to implement as lock-free on future processors.
216 return "1"; // "sometimes lock free"
217}
218
John McCallf85e1932011-06-15 23:02:42 +0000219/// \brief Add definitions required for a smooth interaction between
John McCallf85e1932011-06-15 23:02:42 +0000220/// Objective-C++ automated reference counting and libstdc++ (4.2).
221static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts,
222 MacroBuilder &Builder) {
223 Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR");
224
225 std::string Result;
226 {
227 // Provide specializations for the __is_scalar type trait so that
228 // lifetime-qualified objects are not considered "scalar" types, which
229 // libstdc++ uses as an indicator of the presence of trivial copy, assign,
230 // default-construct, and destruct semantics (none of which hold for
231 // lifetime-qualified objects in ARC).
232 llvm::raw_string_ostream Out(Result);
233
234 Out << "namespace std {\n"
235 << "\n"
236 << "struct __true_type;\n"
237 << "struct __false_type;\n"
238 << "\n";
239
240 Out << "template<typename _Tp> struct __is_scalar;\n"
241 << "\n";
242
243 Out << "template<typename _Tp>\n"
Argyrios Kyrtzidisb8b03132011-06-24 00:08:59 +0000244 << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n"
John McCallf85e1932011-06-15 23:02:42 +0000245 << " enum { __value = 0 };\n"
246 << " typedef __false_type __type;\n"
247 << "};\n"
248 << "\n";
249
John McCall9f084a32011-07-06 00:26:06 +0000250 if (LangOpts.ObjCRuntimeHasWeak) {
John McCallf85e1932011-06-15 23:02:42 +0000251 Out << "template<typename _Tp>\n"
Argyrios Kyrtzidisb8b03132011-06-24 00:08:59 +0000252 << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n"
John McCallf85e1932011-06-15 23:02:42 +0000253 << " enum { __value = 0 };\n"
254 << " typedef __false_type __type;\n"
255 << "};\n"
256 << "\n";
257 }
258
259 Out << "template<typename _Tp>\n"
Argyrios Kyrtzidisb8b03132011-06-24 00:08:59 +0000260 << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))"
John McCallf85e1932011-06-15 23:02:42 +0000261 << " _Tp> {\n"
262 << " enum { __value = 0 };\n"
263 << " typedef __false_type __type;\n"
264 << "};\n"
265 << "\n";
266
267 Out << "}\n";
268 }
269 Builder.append(Result);
270}
271
Nick Lewyckya9c64412011-06-07 06:07:12 +0000272static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
273 const LangOptions &LangOpts,
274 const FrontendOptions &FEOpts,
275 MacroBuilder &Builder) {
Eli Friedman85037d92011-10-19 23:46:05 +0000276 if (!LangOpts.MicrosoftMode && !LangOpts.TraditionalCPP)
Nick Lewyckya9c64412011-06-07 06:07:12 +0000277 Builder.defineMacro("__STDC__");
278 if (LangOpts.Freestanding)
279 Builder.defineMacro("__STDC_HOSTED__", "0");
280 else
281 Builder.defineMacro("__STDC_HOSTED__");
282
283 if (!LangOpts.CPlusPlus) {
Benjamin Kramerffbe9b92011-12-23 17:00:35 +0000284 if (LangOpts.C11)
Benjamin Kramer430cf512011-12-23 17:00:41 +0000285 Builder.defineMacro("__STDC_VERSION__", "201112L");
Douglas Gregor5aa6dea2011-10-28 23:02:54 +0000286 else if (LangOpts.C99)
Nick Lewyckya9c64412011-06-07 06:07:12 +0000287 Builder.defineMacro("__STDC_VERSION__", "199901L");
288 else if (!LangOpts.GNUMode && LangOpts.Digraphs)
289 Builder.defineMacro("__STDC_VERSION__", "199409L");
290 } else {
291 if (LangOpts.GNUMode)
292 Builder.defineMacro("__cplusplus");
Douglas Gregor06788992011-06-20 15:00:58 +0000293 else {
294 // C++0x [cpp.predefined]p1:
295 // The name_ _cplusplus is defined to the value 201103L when compiling a
296 // C++ translation unit.
297 if (LangOpts.CPlusPlus0x)
298 Builder.defineMacro("__cplusplus", "201103L");
299 // C++03 [cpp.predefined]p1:
Nick Lewyckya9c64412011-06-07 06:07:12 +0000300 // The name_ _cplusplus is defined to the value 199711L when compiling a
301 // C++ translation unit.
Douglas Gregor06788992011-06-20 15:00:58 +0000302 else
303 Builder.defineMacro("__cplusplus", "199711L");
304 }
Nick Lewyckya9c64412011-06-07 06:07:12 +0000305 }
306
Nick Lewycky14648092011-06-10 20:56:43 +0000307 if (LangOpts.ObjC1)
308 Builder.defineMacro("__OBJC__");
309
Nick Lewyckya9c64412011-06-07 06:07:12 +0000310 // Not "standard" per se, but available even with the -undef flag.
311 if (LangOpts.AsmPreprocessor)
312 Builder.defineMacro("__ASSEMBLER__");
313}
314
Chris Lattnere116ccf2009-04-21 05:40:52 +0000315static void InitializePredefinedMacros(const TargetInfo &TI,
316 const LangOptions &LangOpts,
Fariborz Jahanian7d957472010-01-13 18:51:17 +0000317 const FrontendOptions &FEOpts,
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000318 MacroBuilder &Builder) {
Chris Lattnere116ccf2009-04-21 05:40:52 +0000319 // Compiler version introspection macros.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000320 Builder.defineMacro("__llvm__"); // LLVM Backend
321 Builder.defineMacro("__clang__"); // Clang Frontend
Douglas Gregor4290fbd2010-04-30 02:51:06 +0000322#define TOSTR2(X) #X
323#define TOSTR(X) TOSTR2(X)
324 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR));
325 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR));
326#ifdef CLANG_VERSION_PATCHLEVEL
327 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL));
328#else
329 Builder.defineMacro("__clang_patchlevel__", "0");
330#endif
331 Builder.defineMacro("__clang_version__",
332 "\"" CLANG_VERSION_STRING " ("
333 + getClangFullRepositoryVersion() + ")\"");
334#undef TOSTR
335#undef TOSTR2
Aaron Ballman5b31d552012-03-10 22:21:14 +0000336 if (!LangOpts.MicrosoftMode) {
337 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're
338 // not compiling for MSVC compatibility
339 Builder.defineMacro("__GNUC_MINOR__", "2");
340 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1");
341 Builder.defineMacro("__GNUC__", "4");
342 Builder.defineMacro("__GXX_ABI_VERSION", "1002");
343 }
Daniel Dunbarad1a4c62011-03-31 00:53:51 +0000344
David Chisnall7a7ee302012-01-16 17:27:18 +0000345 // Define macros for the C11 / C++11 memory orderings
346 Builder.defineMacro("__ATOMIC_RELAXED", "0");
347 Builder.defineMacro("__ATOMIC_CONSUME", "1");
348 Builder.defineMacro("__ATOMIC_ACQUIRE", "2");
349 Builder.defineMacro("__ATOMIC_RELEASE", "3");
350 Builder.defineMacro("__ATOMIC_ACQ_REL", "4");
351 Builder.defineMacro("__ATOMIC_SEQ_CST", "5");
352
David Chisnall5f3c1632012-02-18 16:12:34 +0000353 // Support for #pragma redefine_extname (Sun compatibility)
354 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1");
355
Daniel Dunbarad1a4c62011-03-31 00:53:51 +0000356 // As sad as it is, enough software depends on the __VERSION__ for version
357 // checks that it is necessary to report 4.2.1 (the base GCC version we claim
358 // compatibility with) first.
359 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " +
Chris Lattner5f9e2722011-07-23 10:55:15 +0000360 Twine(getClangFullCPPVersion()) + "\"");
Mike Stump1eb44332009-09-09 15:08:12 +0000361
Chris Lattnere116ccf2009-04-21 05:40:52 +0000362 // Initialize language-specific preprocessor defines.
Mike Stump1eb44332009-09-09 15:08:12 +0000363
Chris Lattnere116ccf2009-04-21 05:40:52 +0000364 // Standard conforming mode?
365 if (!LangOpts.GNUMode)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000366 Builder.defineMacro("__STRICT_ANSI__");
Mike Stump1eb44332009-09-09 15:08:12 +0000367
Chris Lattnere116ccf2009-04-21 05:40:52 +0000368 if (LangOpts.CPlusPlus0x)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000369 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000370
Chris Lattnere116ccf2009-04-21 05:40:52 +0000371 if (LangOpts.ObjC1) {
Chris Lattnere116ccf2009-04-21 05:40:52 +0000372 if (LangOpts.ObjCNonFragileABI) {
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000373 Builder.defineMacro("__OBJC2__");
Douglas Gregoreced60c2011-09-12 15:17:19 +0000374
375 if (LangOpts.ObjCExceptions)
376 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000377 }
378
Douglas Gregore289d812011-09-13 17:21:33 +0000379 if (LangOpts.getGC() != LangOptions::NonGC)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000380 Builder.defineMacro("__OBJC_GC__");
Mike Stump1eb44332009-09-09 15:08:12 +0000381
Chris Lattnere116ccf2009-04-21 05:40:52 +0000382 if (LangOpts.NeXTRuntime)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000383 Builder.defineMacro("__NEXT_RUNTIME__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000384 }
Mike Stump1eb44332009-09-09 15:08:12 +0000385
Chris Lattnere116ccf2009-04-21 05:40:52 +0000386 // darwin_constant_cfstrings controls this. This is also dependent
387 // on other things like the runtime I believe. This is set even for C code.
Fariborz Jahanian16c3eae2011-07-05 16:00:59 +0000388 if (!LangOpts.NoConstantCFStrings)
389 Builder.defineMacro("__CONSTANT_CFSTRINGS__");
Mike Stump1eb44332009-09-09 15:08:12 +0000390
Chris Lattnere116ccf2009-04-21 05:40:52 +0000391 if (LangOpts.ObjC2)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000392 Builder.defineMacro("OBJC_NEW_PROPERTIES");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000393
394 if (LangOpts.PascalStrings)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000395 Builder.defineMacro("__PASCAL_STRINGS__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000396
397 if (LangOpts.Blocks) {
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000398 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))");
399 Builder.defineMacro("__BLOCKS__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000400 }
Mike Stump1eb44332009-09-09 15:08:12 +0000401
Douglas Gregoreced60c2011-09-12 15:17:19 +0000402 if (LangOpts.CXXExceptions)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000403 Builder.defineMacro("__EXCEPTIONS");
Dan Gohmancfeac342010-05-28 00:27:15 +0000404 if (LangOpts.RTTI)
405 Builder.defineMacro("__GXX_RTTI");
Daniel Dunbarb2987d12010-02-10 18:49:11 +0000406 if (LangOpts.SjLjExceptions)
407 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__");
Rafael Espindolaf759df02009-10-01 13:33:33 +0000408
Chandler Carruthf8c247d2011-04-23 19:48:40 +0000409 if (LangOpts.Deprecated)
410 Builder.defineMacro("__DEPRECATED");
411
Chris Lattnere116ccf2009-04-21 05:40:52 +0000412 if (LangOpts.CPlusPlus) {
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000413 Builder.defineMacro("__GNUG__", "4");
414 Builder.defineMacro("__GXX_WEAK__");
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000415 Builder.defineMacro("__private_extern__", "extern");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000416 }
Mike Stump1eb44332009-09-09 15:08:12 +0000417
Francois Pichet62ec1f22011-09-17 17:15:52 +0000418 if (LangOpts.MicrosoftExt) {
Steve Narofffdd6aaf2009-12-04 21:29:41 +0000419 // Both __PRETTY_FUNCTION__ and __FUNCTION__ are GCC extensions, however
420 // VC++ appears to only like __FUNCTION__.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000421 Builder.defineMacro("__PRETTY_FUNCTION__", "__FUNCTION__");
John Thompson24ee8042009-10-16 01:12:00 +0000422 // Work around some issues with Visual C++ headerws.
423 if (LangOpts.CPlusPlus) {
424 // Since we define wchar_t in C++ mode.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000425 Builder.defineMacro("_WCHAR_T_DEFINED");
426 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED");
Francois Pichet4b7e0482011-05-09 22:32:46 +0000427 // FIXME: Support Microsoft's __identifier extension in the lexer.
Francois Picheta23ae3f2011-05-07 17:47:38 +0000428 Builder.append("#define __identifier(x) x");
Douglas Gregor5c0ca522010-08-30 14:44:26 +0000429 Builder.append("class type_info;");
John Thompson24ee8042009-10-16 01:12:00 +0000430 }
Steven Watanabe343d65c2010-09-05 23:16:22 +0000431
432 if (LangOpts.CPlusPlus0x) {
433 Builder.defineMacro("_HAS_CHAR16_T_LANGUAGE_SUPPORT", "1");
434 }
Chris Lattnere116ccf2009-04-21 05:40:52 +0000435 }
Mike Stump1eb44332009-09-09 15:08:12 +0000436
Chris Lattnere116ccf2009-04-21 05:40:52 +0000437 if (LangOpts.Optimize)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000438 Builder.defineMacro("__OPTIMIZE__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000439 if (LangOpts.OptimizeSize)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000440 Builder.defineMacro("__OPTIMIZE_SIZE__");
Mike Stump1eb44332009-09-09 15:08:12 +0000441
Chandler Carruthba9186c2012-01-03 02:46:46 +0000442 if (LangOpts.FastMath)
443 Builder.defineMacro("__FAST_MATH__");
444
Chris Lattnere116ccf2009-04-21 05:40:52 +0000445 // Initialize target-specific preprocessor defines.
Mike Stump1eb44332009-09-09 15:08:12 +0000446
Chris Lattnere116ccf2009-04-21 05:40:52 +0000447 // Define type sizing macros based on the target properties.
448 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far");
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000449 Builder.defineMacro("__CHAR_BIT__", "8");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000450
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000451 DefineTypeSize("__SCHAR_MAX__", TI.getCharWidth(), "", true, Builder);
452 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder);
453 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder);
454 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder);
455 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder);
456 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder);
457 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder);
Chris Lattnere116ccf2009-04-21 05:40:52 +0000458
Dan Gohmancfeac342010-05-28 00:27:15 +0000459 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder);
460 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder);
461 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder);
462 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder);
463 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder);
464 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder);
465 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder);
466 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder);
467 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__",
468 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder);
469 DefineTypeSizeof("__SIZEOF_SIZE_T__",
470 TI.getTypeWidth(TI.getSizeType()), TI, Builder);
471 DefineTypeSizeof("__SIZEOF_WCHAR_T__",
472 TI.getTypeWidth(TI.getWCharType()), TI, Builder);
473 DefineTypeSizeof("__SIZEOF_WINT_T__",
474 TI.getTypeWidth(TI.getWIntType()), TI, Builder);
475
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000476 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder);
477 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder);
478 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder);
479 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder);
480 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder);
481 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder);
482 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder);
483 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder);
484 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder);
485 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder);
486 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder);
487 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder);
488 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder);
489 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder);
Dan Gohmancfeac342010-05-28 00:27:15 +0000490 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder);
491 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder);
Mike Stump1eb44332009-09-09 15:08:12 +0000492
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000493 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat());
494 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat());
495 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat());
Chris Lattnere116ccf2009-04-21 05:40:52 +0000496
497 // Define a __POINTER_WIDTH__ macro for stdint.h.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000498 Builder.defineMacro("__POINTER_WIDTH__",
Chris Lattner5f9e2722011-07-23 10:55:15 +0000499 Twine((int)TI.getPointerWidth(0)));
Mike Stump1eb44332009-09-09 15:08:12 +0000500
Eli Friedman15b91762009-06-05 07:05:05 +0000501 if (!LangOpts.CharIsSigned)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000502 Builder.defineMacro("__CHAR_UNSIGNED__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000503
Eli Friedman1cfeefd2011-04-21 05:45:45 +0000504 if (!TargetInfo::isTypeSigned(TI.getWIntType()))
505 Builder.defineMacro("__WINT_UNSIGNED__");
506
Chris Lattnerdcdd2a02009-11-12 08:08:27 +0000507 // Define exact-width integer types for stdint.h
Chris Lattner5f9e2722011-07-23 10:55:15 +0000508 Builder.defineMacro("__INT" + Twine(TI.getCharWidth()) + "_TYPE__",
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000509 "char");
Mike Stump1eb44332009-09-09 15:08:12 +0000510
Chris Lattnerdcdd2a02009-11-12 08:08:27 +0000511 if (TI.getShortWidth() > TI.getCharWidth())
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000512 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder);
Mike Stump1eb44332009-09-09 15:08:12 +0000513
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000514 if (TI.getIntWidth() > TI.getShortWidth())
515 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder);
516
517 if (TI.getLongWidth() > TI.getIntWidth())
518 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder);
519
520 if (TI.getLongLongWidth() > TI.getLongWidth())
521 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder);
522
523 // Add __builtin_va_list typedef.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000524 Builder.append(TI.getVAListDeclaration());
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000525
526 if (const char *Prefix = TI.getUserLabelPrefix())
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000527 Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix);
Mike Stump1eb44332009-09-09 15:08:12 +0000528
Chris Lattnere116ccf2009-04-21 05:40:52 +0000529 // Build configuration options. FIXME: these should be controlled by
530 // command line options or something.
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000531 Builder.defineMacro("__FINITE_MATH_ONLY__", "0");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000532
Chris Lattnere116ccf2009-04-21 05:40:52 +0000533 if (LangOpts.GNUInline)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000534 Builder.defineMacro("__GNUC_GNU_INLINE__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000535 else
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000536 Builder.defineMacro("__GNUC_STDC_INLINE__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000537
Richard Smith2c39d712012-04-13 00:45:38 +0000538 // The value written by __atomic_test_and_set.
539 // FIXME: This is target-dependent.
540 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1");
541
542 // Used by libstdc++ to implement ATOMIC_<foo>_LOCK_FREE.
543 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth();
544#define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \
545 Builder.defineMacro("__GCC_ATOMIC_" #TYPE "_LOCK_FREE", \
546 getLockFreeValue(TI.get##Type##Width(), \
547 TI.get##Type##Align(), \
548 InlineWidthBits));
549 DEFINE_LOCK_FREE_MACRO(BOOL, Bool);
550 DEFINE_LOCK_FREE_MACRO(CHAR, Char);
551 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16);
552 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32);
553 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar);
554 DEFINE_LOCK_FREE_MACRO(SHORT, Short);
555 DEFINE_LOCK_FREE_MACRO(INT, Int);
556 DEFINE_LOCK_FREE_MACRO(LONG, Long);
557 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong);
558 Builder.defineMacro("__GCC_ATOMIC_POINTER_LOCK_FREE",
559 getLockFreeValue(TI.getPointerWidth(0),
560 TI.getPointerAlign(0),
561 InlineWidthBits));
562#undef DEFINE_LOCK_FREE_MACRO
563
Daniel Dunbar7b140262012-03-09 15:39:08 +0000564 if (LangOpts.NoInlineDefine)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000565 Builder.defineMacro("__NO_INLINE__");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000566
567 if (unsigned PICLevel = LangOpts.PICLevel) {
Chris Lattner5f9e2722011-07-23 10:55:15 +0000568 Builder.defineMacro("__PIC__", Twine(PICLevel));
569 Builder.defineMacro("__pic__", Twine(PICLevel));
Chris Lattnere116ccf2009-04-21 05:40:52 +0000570 }
Chandler Carruth5e219cf2012-04-08 16:40:35 +0000571 if (unsigned PIELevel = LangOpts.PIELevel) {
572 Builder.defineMacro("__PIE__", Twine(PIELevel));
573 Builder.defineMacro("__pie__", Twine(PIELevel));
574 }
Chris Lattnere116ccf2009-04-21 05:40:52 +0000575
576 // Macros to control C99 numerics and <float.h>
Benjamin Kramerb4066692011-12-28 15:47:06 +0000577 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod()));
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000578 Builder.defineMacro("__FLT_RADIX__", "2");
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000579 int Dig = PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36);
Chris Lattner5f9e2722011-07-23 10:55:15 +0000580 Builder.defineMacro("__DECIMAL_DIG__", Twine(Dig));
Bill Wendling45483f72009-06-28 07:36:13 +0000581
Douglas Gregore289d812011-09-13 17:21:33 +0000582 if (LangOpts.getStackProtector() == LangOptions::SSPOn)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000583 Builder.defineMacro("__SSP__");
Douglas Gregore289d812011-09-13 17:21:33 +0000584 else if (LangOpts.getStackProtector() == LangOptions::SSPReq)
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000585 Builder.defineMacro("__SSP_ALL__", "2");
Bill Wendling45483f72009-06-28 07:36:13 +0000586
Fariborz Jahanian7d957472010-01-13 18:51:17 +0000587 if (FEOpts.ProgramAction == frontend::RewriteObjC)
588 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
Ted Kremenekf0af7772010-05-26 21:36:54 +0000589
590 // Define a macro that exists only when using the static analyzer.
591 if (FEOpts.ProgramAction == frontend::RunAnalysis)
592 Builder.defineMacro("__clang_analyzer__");
593
Peter Collingbournef0840822010-12-04 01:51:23 +0000594 if (LangOpts.FastRelaxedMath)
595 Builder.defineMacro("__FAST_RELAXED_MATH__");
596
John McCall098df7f2011-06-16 00:03:19 +0000597 if (LangOpts.ObjCAutoRefCount) {
Argyrios Kyrtzidisb8b03132011-06-24 00:08:59 +0000598 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))");
599 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))");
John McCall098df7f2011-06-16 00:03:19 +0000600 Builder.defineMacro("__autoreleasing",
Argyrios Kyrtzidisb8b03132011-06-24 00:08:59 +0000601 "__attribute__((objc_ownership(autoreleasing)))");
John McCall098df7f2011-06-16 00:03:19 +0000602 Builder.defineMacro("__unsafe_unretained",
Argyrios Kyrtzidisb8b03132011-06-24 00:08:59 +0000603 "__attribute__((objc_ownership(none)))");
John McCall098df7f2011-06-16 00:03:19 +0000604 }
605
Chris Lattnere116ccf2009-04-21 05:40:52 +0000606 // Get other target #defines.
Benjamin Kramera9992772010-01-09 17:55:51 +0000607 TI.getTargetDefines(LangOpts, Builder);
Chris Lattnere116ccf2009-04-21 05:40:52 +0000608}
609
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000610// Initialize the remapping of files to alternative contents, e.g.,
611// those specified through other files.
David Blaikied6471f72011-09-25 23:23:43 +0000612static void InitializeFileRemapping(DiagnosticsEngine &Diags,
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000613 SourceManager &SourceMgr,
614 FileManager &FileMgr,
615 const PreprocessorOptions &InitOpts) {
Douglas Gregor4db64a42010-01-23 00:14:00 +0000616 // Remap files in the source manager (with buffers).
Douglas Gregor44c181a2010-07-23 00:33:23 +0000617 for (PreprocessorOptions::const_remapped_file_buffer_iterator
Douglas Gregor4db64a42010-01-23 00:14:00 +0000618 Remap = InitOpts.remapped_file_buffer_begin(),
619 RemapEnd = InitOpts.remapped_file_buffer_end();
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000620 Remap != RemapEnd;
621 ++Remap) {
Douglas Gregor057e5672009-12-02 18:12:28 +0000622 // Create the file entry for the file that we're mapping from.
623 const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first,
Douglas Gregor4db64a42010-01-23 00:14:00 +0000624 Remap->second->getBufferSize(),
Chris Lattner39b49bc2010-11-23 08:35:12 +0000625 0);
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000626 if (!FromFile) {
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000627 Diags.Report(diag::err_fe_remap_missing_from_file)
628 << Remap->first;
Douglas Gregorf4f6c9d2010-07-26 21:36:20 +0000629 if (!InitOpts.RetainRemappedFileBuffers)
630 delete Remap->second;
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000631 continue;
632 }
633
Douglas Gregor4db64a42010-01-23 00:14:00 +0000634 // Override the contents of the "from" file with the contents of
635 // the "to" file.
Douglas Gregorf4f6c9d2010-07-26 21:36:20 +0000636 SourceMgr.overrideFileContents(FromFile, Remap->second,
637 InitOpts.RetainRemappedFileBuffers);
Douglas Gregor4db64a42010-01-23 00:14:00 +0000638 }
639
640 // Remap files in the source manager (with other files).
Douglas Gregor44c181a2010-07-23 00:33:23 +0000641 for (PreprocessorOptions::const_remapped_file_iterator
642 Remap = InitOpts.remapped_file_begin(),
643 RemapEnd = InitOpts.remapped_file_end();
Douglas Gregor4db64a42010-01-23 00:14:00 +0000644 Remap != RemapEnd;
645 ++Remap) {
646 // Find the file that we're mapping to.
Chris Lattner39b49bc2010-11-23 08:35:12 +0000647 const FileEntry *ToFile = FileMgr.getFile(Remap->second);
Douglas Gregor4db64a42010-01-23 00:14:00 +0000648 if (!ToFile) {
649 Diags.Report(diag::err_fe_remap_missing_to_file)
650 << Remap->first << Remap->second;
651 continue;
652 }
653
654 // Create the file entry for the file that we're mapping from.
655 const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first,
Chris Lattner39b49bc2010-11-23 08:35:12 +0000656 ToFile->getSize(), 0);
Douglas Gregor4db64a42010-01-23 00:14:00 +0000657 if (!FromFile) {
658 Diags.Report(diag::err_fe_remap_missing_from_file)
659 << Remap->first;
660 continue;
661 }
662
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000663 // Override the contents of the "from" file with the contents of
664 // the "to" file.
Argyrios Kyrtzidis299a4a92011-03-08 23:35:24 +0000665 SourceMgr.overrideFileContents(FromFile, ToFile);
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000666 }
Argyrios Kyrtzidis299a4a92011-03-08 23:35:24 +0000667
668 SourceMgr.setOverridenFilesKeepOriginalName(
669 InitOpts.RemappedFilesKeepOriginalName);
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000670}
671
Chris Lattnere116ccf2009-04-21 05:40:52 +0000672/// InitializePreprocessor - Initialize the preprocessor getting it and the
673/// environment ready to process a single file. This returns true on error.
674///
Daniel Dunbar938963f2009-11-04 21:13:15 +0000675void clang::InitializePreprocessor(Preprocessor &PP,
Daniel Dunbar961c76e2009-11-11 21:44:42 +0000676 const PreprocessorOptions &InitOpts,
Fariborz Jahanian7d957472010-01-13 18:51:17 +0000677 const HeaderSearchOptions &HSOpts,
678 const FrontendOptions &FEOpts) {
David Blaikie4e4d0842012-03-11 07:00:24 +0000679 const LangOptions &LangOpts = PP.getLangOpts();
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000680 std::string PredefineBuffer;
681 PredefineBuffer.reserve(4080);
682 llvm::raw_string_ostream Predefines(PredefineBuffer);
683 MacroBuilder Builder(Predefines);
Mike Stump1eb44332009-09-09 15:08:12 +0000684
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000685 InitializeFileRemapping(PP.getDiagnostics(), PP.getSourceManager(),
Chris Lattner39b49bc2010-11-23 08:35:12 +0000686 PP.getFileManager(), InitOpts);
Douglas Gregor2973c0e2009-12-02 16:32:41 +0000687
Chris Lattnerfcaa9e72010-04-26 22:08:10 +0000688 // Emit line markers for various builtin sections of the file. We don't do
689 // this in asm preprocessor mode, because "# 4" is not a line marker directive
690 // in this mode.
David Blaikie4e4d0842012-03-11 07:00:24 +0000691 if (!PP.getLangOpts().AsmPreprocessor)
Chris Lattnerfcaa9e72010-04-26 22:08:10 +0000692 Builder.append("# 1 \"<built-in>\" 3");
Mike Stump1eb44332009-09-09 15:08:12 +0000693
Chris Lattnere116ccf2009-04-21 05:40:52 +0000694 // Install things like __POWERPC__, __GNUC__, etc into the macro table.
John McCallf85e1932011-06-15 23:02:42 +0000695 if (InitOpts.UsePredefines) {
696 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder);
Mike Stump1eb44332009-09-09 15:08:12 +0000697
John McCallf85e1932011-06-15 23:02:42 +0000698 // Install definitions to make Objective-C++ ARC work well with various
699 // C++ Standard Library implementations.
700 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && LangOpts.ObjCAutoRefCount) {
701 switch (InitOpts.ObjCXXARCStandardLibrary) {
702 case ARCXX_nolib:
Douglas Gregored73b102011-09-27 22:48:19 +0000703 case ARCXX_libcxx:
John McCallf85e1932011-06-15 23:02:42 +0000704 break;
705
706 case ARCXX_libstdcxx:
707 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder);
708 break;
709 }
710 }
711 }
712
Nick Lewyckya9c64412011-06-07 06:07:12 +0000713 // Even with predefines off, some macros are still predefined.
714 // These should all be defined in the preprocessor according to the
715 // current language configuration.
David Blaikie4e4d0842012-03-11 07:00:24 +0000716 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(),
Nick Lewyckya9c64412011-06-07 06:07:12 +0000717 FEOpts, Builder);
718
Chris Lattnere116ccf2009-04-21 05:40:52 +0000719 // Add on the predefines from the driver. Wrap in a #line directive to report
720 // that they come from the command line.
David Blaikie4e4d0842012-03-11 07:00:24 +0000721 if (!PP.getLangOpts().AsmPreprocessor)
Chris Lattnerfcaa9e72010-04-26 22:08:10 +0000722 Builder.append("# 1 \"<command line>\" 1");
Chris Lattnere116ccf2009-04-21 05:40:52 +0000723
724 // Process #define's and #undef's in the order they are given.
Daniel Dunbar049d3a02009-11-17 05:52:41 +0000725 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) {
726 if (InitOpts.Macros[i].second) // isUndef
Benjamin Kramerb1b5b902010-01-09 17:43:21 +0000727 Builder.undefineMacro(InitOpts.Macros[i].first);
Chris Lattner62f86c42009-04-21 06:00:24 +0000728 else
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000729 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first,
Daniel Dunbar1ee4b9e2010-01-10 00:46:21 +0000730 PP.getDiagnostics());
Chris Lattnere116ccf2009-04-21 05:40:52 +0000731 }
732
733 // If -imacros are specified, include them now. These are processed before
734 // any -include directives.
Daniel Dunbar049d3a02009-11-17 05:52:41 +0000735 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
Nick Lewycky277a6e72011-02-23 21:16:44 +0000736 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i],
737 PP.getFileManager());
Chris Lattnere116ccf2009-04-21 05:40:52 +0000738
739 // Process -include directives.
Daniel Dunbar049d3a02009-11-17 05:52:41 +0000740 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
741 const std::string &Path = InitOpts.Includes[i];
742 if (Path == InitOpts.ImplicitPTHInclude)
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000743 AddImplicitIncludePTH(Builder, PP, Path);
Chris Lattner62f86c42009-04-21 06:00:24 +0000744 else
Nick Lewycky277a6e72011-02-23 21:16:44 +0000745 AddImplicitInclude(Builder, Path, PP.getFileManager());
Eli Friedmanae96a962009-06-15 09:57:52 +0000746 }
Chris Lattnere116ccf2009-04-21 05:40:52 +0000747
Rafael Espindola0259d202009-12-01 18:28:16 +0000748 // Exit the command line and go back to <built-in> (2 is LC_LEAVE).
David Blaikie4e4d0842012-03-11 07:00:24 +0000749 if (!PP.getLangOpts().AsmPreprocessor)
Chris Lattnerfcaa9e72010-04-26 22:08:10 +0000750 Builder.append("# 1 \"<built-in>\" 2");
Rafael Espindola0259d202009-12-01 18:28:16 +0000751
Douglas Gregorf4f6c9d2010-07-26 21:36:20 +0000752 // Instruct the preprocessor to skip the preamble.
753 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first,
754 InitOpts.PrecompiledPreambleBytes.second);
755
Benjamin Kramera3d8ced2010-01-09 16:17:37 +0000756 // Copy PredefinedBuffer into the Preprocessor.
757 PP.setPredefines(Predefines.str());
Douglas Gregorfba18aa2011-09-15 22:00:41 +0000758
Daniel Dunbar961c76e2009-11-11 21:44:42 +0000759 // Initialize the header search object.
760 ApplyHeaderSearchOptions(PP.getHeaderSearchInfo(), HSOpts,
David Blaikie4e4d0842012-03-11 07:00:24 +0000761 PP.getLangOpts(),
Daniel Dunbar961c76e2009-11-11 21:44:42 +0000762 PP.getTargetInfo().getTriple());
Chris Lattnere116ccf2009-04-21 05:40:52 +0000763}