1 //===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the clang::InitializePreprocessor function.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Basic/Version.h"
15 #include "clang/Frontend/Utils.h"
16 #include "clang/Basic/MacroBuilder.h"
17 #include "clang/Basic/TargetInfo.h"
18 #include "clang/Frontend/FrontendDiagnostic.h"
19 #include "clang/Frontend/FrontendOptions.h"
20 #include "clang/Lex/HeaderSearch.h"
21 #include "clang/Lex/Preprocessor.h"
22 #include "clang/Lex/PreprocessorOptions.h"
23 #include "clang/Basic/FileManager.h"
24 #include "clang/Basic/SourceManager.h"
25 #include "clang/Serialization/ASTReader.h"
26 #include "llvm/ADT/APFloat.h"
27 #include "llvm/Support/FileSystem.h"
28 #include "llvm/Support/MemoryBuffer.h"
29 #include "llvm/Support/Path.h"
30 using namespace clang;
32 // Append a #define line to Buf for Macro. Macro should be of the form XXX,
33 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
34 // "#define XXX Y z W". To get a #define with no value, use "XXX=".
35 static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro,
36 DiagnosticsEngine &Diags) {
37 std::pair<StringRef, StringRef> MacroPair = Macro.split('=');
38 StringRef MacroName = MacroPair.first;
39 StringRef MacroBody = MacroPair.second;
40 if (MacroName.size() != Macro.size()) {
41 // Per GCC -D semantics, the macro ends at \n if it exists.
42 StringRef::size_type End = MacroBody.find_first_of("\n\r");
43 if (End != StringRef::npos)
44 Diags.Report(diag::warn_fe_macro_contains_embedded_newline)
46 Builder.defineMacro(MacroName, MacroBody.substr(0, End));
48 // Push "macroname 1".
49 Builder.defineMacro(Macro);
53 /// AddImplicitInclude - Add an implicit \#include of the specified file to the
54 /// predefines buffer.
55 static void AddImplicitInclude(MacroBuilder &Builder, StringRef File,
56 FileManager &FileMgr) {
57 Builder.append(Twine("#include \"") +
58 HeaderSearch::NormalizeDashIncludePath(File, FileMgr) + "\"");
61 static void AddImplicitIncludeMacros(MacroBuilder &Builder,
63 FileManager &FileMgr) {
64 Builder.append(Twine("#__include_macros \"") +
65 HeaderSearch::NormalizeDashIncludePath(File, FileMgr) + "\"");
66 // Marker token to stop the __include_macros fetch loop.
67 Builder.append("##"); // ##?
70 /// AddImplicitIncludePTH - Add an implicit \#include using the original file
71 /// used to generate a PTH cache.
72 static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP,
73 StringRef ImplicitIncludePTH) {
74 PTHManager *P = PP.getPTHManager();
75 // Null check 'P' in the corner case where it couldn't be created.
76 const char *OriginalFile = P ? P->getOriginalSourceFile() : 0;
79 PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header)
80 << ImplicitIncludePTH;
84 AddImplicitInclude(Builder, OriginalFile, PP.getFileManager());
87 /// \brief Add an implicit \#include using the original file used to generate
89 static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP,
90 StringRef ImplicitIncludePCH) {
91 std::string OriginalFile =
92 ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(),
94 if (OriginalFile.empty())
97 AddImplicitInclude(Builder, OriginalFile, PP.getFileManager());
100 /// PickFP - This is used to pick a value based on the FP semantics of the
101 /// specified FP model.
102 template <typename T>
103 static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal,
104 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal,
106 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle)
107 return IEEESingleVal;
108 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble)
109 return IEEEDoubleVal;
110 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended)
111 return X87DoubleExtendedVal;
112 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble)
113 return PPCDoubleDoubleVal;
114 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad);
118 static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix,
119 const llvm::fltSemantics *Sem, StringRef Ext) {
120 const char *DenormMin, *Epsilon, *Max, *Min;
121 DenormMin = PickFP(Sem, "1.40129846e-45", "4.9406564584124654e-324",
122 "3.64519953188247460253e-4951",
123 "4.94065645841246544176568792868221e-324",
124 "6.47517511943802511092443895822764655e-4966");
125 int Digits = PickFP(Sem, 6, 15, 18, 31, 33);
126 Epsilon = PickFP(Sem, "1.19209290e-7", "2.2204460492503131e-16",
127 "1.08420217248550443401e-19",
128 "4.94065645841246544176568792868221e-324",
129 "1.92592994438723585305597794258492732e-34");
130 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113);
131 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931);
132 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932);
133 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381);
134 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384);
135 Min = PickFP(Sem, "1.17549435e-38", "2.2250738585072014e-308",
136 "3.36210314311209350626e-4932",
137 "2.00416836000897277799610805135016e-292",
138 "3.36210314311209350626267781732175260e-4932");
139 Max = PickFP(Sem, "3.40282347e+38", "1.7976931348623157e+308",
140 "1.18973149535723176502e+4932",
141 "1.79769313486231580793728971405301e+308",
142 "1.18973149535723176508575932662800702e+4932");
144 SmallString<32> DefPrefix;
149 Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext);
150 Builder.defineMacro(DefPrefix + "HAS_DENORM__");
151 Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits));
152 Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext);
153 Builder.defineMacro(DefPrefix + "HAS_INFINITY__");
154 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__");
155 Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits));
157 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp));
158 Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp));
159 Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext);
161 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")");
162 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")");
163 Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext);
167 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro
168 /// named MacroName with the max value for a type with width 'TypeWidth' a
169 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL).
170 static void DefineTypeSize(StringRef MacroName, unsigned TypeWidth,
171 StringRef ValSuffix, bool isSigned,
172 MacroBuilder &Builder) {
173 llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth)
174 : llvm::APInt::getMaxValue(TypeWidth);
175 Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix);
178 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine
179 /// the width, suffix, and signedness of the given type
180 static void DefineTypeSize(StringRef MacroName, TargetInfo::IntType Ty,
181 const TargetInfo &TI, MacroBuilder &Builder) {
182 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty),
183 TI.isTypeSigned(Ty), Builder);
186 static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty,
187 MacroBuilder &Builder) {
188 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty));
191 static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty,
192 const TargetInfo &TI, MacroBuilder &Builder) {
193 Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty)));
196 static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth,
197 const TargetInfo &TI, MacroBuilder &Builder) {
198 Builder.defineMacro(MacroName,
199 Twine(BitWidth / TI.getCharWidth()));
202 static void DefineExactWidthIntType(TargetInfo::IntType Ty,
203 const TargetInfo &TI, MacroBuilder &Builder) {
204 int TypeWidth = TI.getTypeWidth(Ty);
206 // Use the target specified int64 type, when appropriate, so that [u]int64_t
207 // ends up being defined in terms of the correct type.
209 Ty = TI.getInt64Type();
211 DefineType("__INT" + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
213 StringRef ConstSuffix(TargetInfo::getTypeConstantSuffix(Ty));
214 if (!ConstSuffix.empty())
215 Builder.defineMacro("__INT" + Twine(TypeWidth) + "_C_SUFFIX__",
219 /// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with
220 /// the specified properties.
221 static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign,
222 unsigned InlineWidth) {
223 // Fully-aligned, power-of-2 sizes no larger than the inline
224 // width will be inlined as lock-free operations.
225 if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 &&
226 TypeWidth <= InlineWidth)
227 return "2"; // "always lock free"
228 // We cannot be certain what operations the lib calls might be
229 // able to implement as lock-free on future processors.
230 return "1"; // "sometimes lock free"
233 /// \brief Add definitions required for a smooth interaction between
234 /// Objective-C++ automated reference counting and libstdc++ (4.2).
235 static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts,
236 MacroBuilder &Builder) {
237 Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR");
241 // Provide specializations for the __is_scalar type trait so that
242 // lifetime-qualified objects are not considered "scalar" types, which
243 // libstdc++ uses as an indicator of the presence of trivial copy, assign,
244 // default-construct, and destruct semantics (none of which hold for
245 // lifetime-qualified objects in ARC).
246 llvm::raw_string_ostream Out(Result);
248 Out << "namespace std {\n"
250 << "struct __true_type;\n"
251 << "struct __false_type;\n"
254 Out << "template<typename _Tp> struct __is_scalar;\n"
257 Out << "template<typename _Tp>\n"
258 << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n"
259 << " enum { __value = 0 };\n"
260 << " typedef __false_type __type;\n"
264 if (LangOpts.ObjCARCWeak) {
265 Out << "template<typename _Tp>\n"
266 << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n"
267 << " enum { __value = 0 };\n"
268 << " typedef __false_type __type;\n"
273 Out << "template<typename _Tp>\n"
274 << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))"
276 << " enum { __value = 0 };\n"
277 << " typedef __false_type __type;\n"
283 Builder.append(Result);
286 static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
287 const LangOptions &LangOpts,
288 const FrontendOptions &FEOpts,
289 MacroBuilder &Builder) {
290 if (!LangOpts.MicrosoftMode && !LangOpts.TraditionalCPP)
291 Builder.defineMacro("__STDC__");
292 if (LangOpts.Freestanding)
293 Builder.defineMacro("__STDC_HOSTED__", "0");
295 Builder.defineMacro("__STDC_HOSTED__");
297 if (!LangOpts.CPlusPlus) {
299 Builder.defineMacro("__STDC_VERSION__", "201112L");
300 else if (LangOpts.C99)
301 Builder.defineMacro("__STDC_VERSION__", "199901L");
302 else if (!LangOpts.GNUMode && LangOpts.Digraphs)
303 Builder.defineMacro("__STDC_VERSION__", "199409L");
305 // FIXME: LangOpts.CPlusPlus1y
307 // C++11 [cpp.predefined]p1:
308 // The name __cplusplus is defined to the value 201103L when compiling a
309 // C++ translation unit.
310 if (LangOpts.CPlusPlus0x)
311 Builder.defineMacro("__cplusplus", "201103L");
312 // C++03 [cpp.predefined]p1:
313 // The name __cplusplus is defined to the value 199711L when compiling a
314 // C++ translation unit.
316 Builder.defineMacro("__cplusplus", "199711L");
320 Builder.defineMacro("__OBJC__");
322 // Not "standard" per se, but available even with the -undef flag.
323 if (LangOpts.AsmPreprocessor)
324 Builder.defineMacro("__ASSEMBLER__");
327 static void InitializePredefinedMacros(const TargetInfo &TI,
328 const LangOptions &LangOpts,
329 const FrontendOptions &FEOpts,
330 MacroBuilder &Builder) {
331 // Compiler version introspection macros.
332 Builder.defineMacro("__llvm__"); // LLVM Backend
333 Builder.defineMacro("__clang__"); // Clang Frontend
335 #define TOSTR(X) TOSTR2(X)
336 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR));
337 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR));
338 #ifdef CLANG_VERSION_PATCHLEVEL
339 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL));
341 Builder.defineMacro("__clang_patchlevel__", "0");
343 Builder.defineMacro("__clang_version__",
344 "\"" CLANG_VERSION_STRING " "
345 + getClangFullRepositoryVersion() + "\"");
348 if (!LangOpts.MicrosoftMode) {
349 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're
350 // not compiling for MSVC compatibility
351 Builder.defineMacro("__GNUC_MINOR__", "2");
352 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1");
353 Builder.defineMacro("__GNUC__", "4");
354 Builder.defineMacro("__GXX_ABI_VERSION", "1002");
357 // Define macros for the C11 / C++11 memory orderings
358 Builder.defineMacro("__ATOMIC_RELAXED", "0");
359 Builder.defineMacro("__ATOMIC_CONSUME", "1");
360 Builder.defineMacro("__ATOMIC_ACQUIRE", "2");
361 Builder.defineMacro("__ATOMIC_RELEASE", "3");
362 Builder.defineMacro("__ATOMIC_ACQ_REL", "4");
363 Builder.defineMacro("__ATOMIC_SEQ_CST", "5");
365 // Support for #pragma redefine_extname (Sun compatibility)
366 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1");
368 // As sad as it is, enough software depends on the __VERSION__ for version
369 // checks that it is necessary to report 4.2.1 (the base GCC version we claim
370 // compatibility with) first.
371 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " +
372 Twine(getClangFullCPPVersion()) + "\"");
374 // Initialize language-specific preprocessor defines.
376 // Standard conforming mode?
377 if (!LangOpts.GNUMode)
378 Builder.defineMacro("__STRICT_ANSI__");
380 if (LangOpts.CPlusPlus0x)
381 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");
383 if (LangOpts.ObjC1) {
384 if (LangOpts.ObjCRuntime.isNonFragile()) {
385 Builder.defineMacro("__OBJC2__");
387 if (LangOpts.ObjCExceptions)
388 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
391 if (LangOpts.getGC() != LangOptions::NonGC)
392 Builder.defineMacro("__OBJC_GC__");
394 if (LangOpts.ObjCRuntime.isNeXTFamily())
395 Builder.defineMacro("__NEXT_RUNTIME__");
397 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))");
398 Builder.defineMacro("IBOutletCollection(ClassName)",
399 "__attribute__((iboutletcollection(ClassName)))");
400 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)");
403 // darwin_constant_cfstrings controls this. This is also dependent
404 // on other things like the runtime I believe. This is set even for C code.
405 if (!LangOpts.NoConstantCFStrings)
406 Builder.defineMacro("__CONSTANT_CFSTRINGS__");
409 Builder.defineMacro("OBJC_NEW_PROPERTIES");
411 if (LangOpts.PascalStrings)
412 Builder.defineMacro("__PASCAL_STRINGS__");
414 if (LangOpts.Blocks) {
415 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))");
416 Builder.defineMacro("__BLOCKS__");
419 if (LangOpts.CXXExceptions)
420 Builder.defineMacro("__EXCEPTIONS");
422 Builder.defineMacro("__GXX_RTTI");
423 if (LangOpts.SjLjExceptions)
424 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__");
426 if (LangOpts.Deprecated)
427 Builder.defineMacro("__DEPRECATED");
429 if (LangOpts.CPlusPlus) {
430 Builder.defineMacro("__GNUG__", "4");
431 Builder.defineMacro("__GXX_WEAK__");
432 Builder.defineMacro("__private_extern__", "extern");
435 if (LangOpts.MicrosoftExt) {
436 // Both __PRETTY_FUNCTION__ and __FUNCTION__ are GCC extensions, however
437 // VC++ appears to only like __FUNCTION__.
438 Builder.defineMacro("__PRETTY_FUNCTION__", "__FUNCTION__");
439 // Work around some issues with Visual C++ headers.
440 if (LangOpts.WChar) {
441 // wchar_t supported as a keyword.
442 Builder.defineMacro("_WCHAR_T_DEFINED");
443 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED");
445 if (LangOpts.CPlusPlus) {
446 // FIXME: Support Microsoft's __identifier extension in the lexer.
447 Builder.append("#define __identifier(x) x");
448 Builder.append("class type_info;");
452 if (LangOpts.Optimize)
453 Builder.defineMacro("__OPTIMIZE__");
454 if (LangOpts.OptimizeSize)
455 Builder.defineMacro("__OPTIMIZE_SIZE__");
457 if (LangOpts.FastMath)
458 Builder.defineMacro("__FAST_MATH__");
460 // Initialize target-specific preprocessor defines.
462 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous
463 // to the macro __BYTE_ORDER (no trailing underscores)
464 // from glibc's <endian.h> header.
465 // We don't support the PDP-11 as a target, but include
466 // the define so it can still be compared against.
467 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234");
468 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321");
469 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412");
470 if (TI.isBigEndian())
471 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__");
473 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__");
476 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64
477 && TI.getIntWidth() == 32) {
478 Builder.defineMacro("_LP64");
479 Builder.defineMacro("__LP64__");
482 // Define type sizing macros based on the target properties.
483 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far");
484 Builder.defineMacro("__CHAR_BIT__", "8");
486 DefineTypeSize("__SCHAR_MAX__", TI.getCharWidth(), "", true, Builder);
487 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder);
488 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder);
489 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder);
490 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder);
491 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder);
492 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder);
494 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder);
495 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder);
496 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder);
497 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder);
498 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder);
499 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder);
500 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder);
501 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder);
502 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__",
503 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder);
504 DefineTypeSizeof("__SIZEOF_SIZE_T__",
505 TI.getTypeWidth(TI.getSizeType()), TI, Builder);
506 DefineTypeSizeof("__SIZEOF_WCHAR_T__",
507 TI.getTypeWidth(TI.getWCharType()), TI, Builder);
508 DefineTypeSizeof("__SIZEOF_WINT_T__",
509 TI.getTypeWidth(TI.getWIntType()), TI, Builder);
511 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder);
512 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder);
513 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder);
514 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder);
515 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder);
516 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder);
517 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder);
518 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder);
519 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder);
520 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder);
521 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder);
522 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder);
523 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder);
524 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder);
525 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder);
526 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder);
528 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F");
529 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), "");
530 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L");
532 // Define a __POINTER_WIDTH__ macro for stdint.h.
533 Builder.defineMacro("__POINTER_WIDTH__",
534 Twine((int)TI.getPointerWidth(0)));
536 if (!LangOpts.CharIsSigned)
537 Builder.defineMacro("__CHAR_UNSIGNED__");
539 if (!TargetInfo::isTypeSigned(TI.getWCharType()))
540 Builder.defineMacro("__WCHAR_UNSIGNED__");
542 if (!TargetInfo::isTypeSigned(TI.getWIntType()))
543 Builder.defineMacro("__WINT_UNSIGNED__");
545 // Define exact-width integer types for stdint.h
546 Builder.defineMacro("__INT" + Twine(TI.getCharWidth()) + "_TYPE__",
549 if (TI.getShortWidth() > TI.getCharWidth())
550 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder);
552 if (TI.getIntWidth() > TI.getShortWidth())
553 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder);
555 if (TI.getLongWidth() > TI.getIntWidth())
556 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder);
558 if (TI.getLongLongWidth() > TI.getLongWidth())
559 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder);
561 if (const char *Prefix = TI.getUserLabelPrefix())
562 Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix);
564 if (LangOpts.FastMath || LangOpts.FiniteMathOnly)
565 Builder.defineMacro("__FINITE_MATH_ONLY__", "1");
567 Builder.defineMacro("__FINITE_MATH_ONLY__", "0");
569 if (LangOpts.GNUInline)
570 Builder.defineMacro("__GNUC_GNU_INLINE__");
572 Builder.defineMacro("__GNUC_STDC_INLINE__");
574 // The value written by __atomic_test_and_set.
575 // FIXME: This is target-dependent.
576 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1");
578 // Used by libstdc++ to implement ATOMIC_<foo>_LOCK_FREE.
579 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth();
580 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \
581 Builder.defineMacro("__GCC_ATOMIC_" #TYPE "_LOCK_FREE", \
582 getLockFreeValue(TI.get##Type##Width(), \
583 TI.get##Type##Align(), \
585 DEFINE_LOCK_FREE_MACRO(BOOL, Bool);
586 DEFINE_LOCK_FREE_MACRO(CHAR, Char);
587 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16);
588 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32);
589 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar);
590 DEFINE_LOCK_FREE_MACRO(SHORT, Short);
591 DEFINE_LOCK_FREE_MACRO(INT, Int);
592 DEFINE_LOCK_FREE_MACRO(LONG, Long);
593 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong);
594 Builder.defineMacro("__GCC_ATOMIC_POINTER_LOCK_FREE",
595 getLockFreeValue(TI.getPointerWidth(0),
596 TI.getPointerAlign(0),
598 #undef DEFINE_LOCK_FREE_MACRO
600 if (LangOpts.NoInlineDefine)
601 Builder.defineMacro("__NO_INLINE__");
603 if (unsigned PICLevel = LangOpts.PICLevel) {
604 Builder.defineMacro("__PIC__", Twine(PICLevel));
605 Builder.defineMacro("__pic__", Twine(PICLevel));
607 if (unsigned PIELevel = LangOpts.PIELevel) {
608 Builder.defineMacro("__PIE__", Twine(PIELevel));
609 Builder.defineMacro("__pie__", Twine(PIELevel));
612 // Macros to control C99 numerics and <float.h>
613 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod()));
614 Builder.defineMacro("__FLT_RADIX__", "2");
615 int Dig = PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36);
616 Builder.defineMacro("__DECIMAL_DIG__", Twine(Dig));
618 if (LangOpts.getStackProtector() == LangOptions::SSPOn)
619 Builder.defineMacro("__SSP__");
620 else if (LangOpts.getStackProtector() == LangOptions::SSPReq)
621 Builder.defineMacro("__SSP_ALL__", "2");
623 if (FEOpts.ProgramAction == frontend::RewriteObjC)
624 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
626 // Define a macro that exists only when using the static analyzer.
627 if (FEOpts.ProgramAction == frontend::RunAnalysis)
628 Builder.defineMacro("__clang_analyzer__");
630 if (LangOpts.FastRelaxedMath)
631 Builder.defineMacro("__FAST_RELAXED_MATH__");
633 if (LangOpts.ObjCAutoRefCount) {
634 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))");
635 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))");
636 Builder.defineMacro("__autoreleasing",
637 "__attribute__((objc_ownership(autoreleasing)))");
638 Builder.defineMacro("__unsafe_unretained",
639 "__attribute__((objc_ownership(none)))");
642 // Get other target #defines.
643 TI.getTargetDefines(LangOpts, Builder);
646 // Initialize the remapping of files to alternative contents, e.g.,
647 // those specified through other files.
648 static void InitializeFileRemapping(DiagnosticsEngine &Diags,
649 SourceManager &SourceMgr,
650 FileManager &FileMgr,
651 const PreprocessorOptions &InitOpts) {
652 // Remap files in the source manager (with buffers).
653 for (PreprocessorOptions::const_remapped_file_buffer_iterator
654 Remap = InitOpts.remapped_file_buffer_begin(),
655 RemapEnd = InitOpts.remapped_file_buffer_end();
658 // Create the file entry for the file that we're mapping from.
659 const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first,
660 Remap->second->getBufferSize(),
663 Diags.Report(diag::err_fe_remap_missing_from_file)
665 if (!InitOpts.RetainRemappedFileBuffers)
666 delete Remap->second;
670 // Override the contents of the "from" file with the contents of
672 SourceMgr.overrideFileContents(FromFile, Remap->second,
673 InitOpts.RetainRemappedFileBuffers);
676 // Remap files in the source manager (with other files).
677 for (PreprocessorOptions::const_remapped_file_iterator
678 Remap = InitOpts.remapped_file_begin(),
679 RemapEnd = InitOpts.remapped_file_end();
682 // Find the file that we're mapping to.
683 const FileEntry *ToFile = FileMgr.getFile(Remap->second);
685 Diags.Report(diag::err_fe_remap_missing_to_file)
686 << Remap->first << Remap->second;
690 // Create the file entry for the file that we're mapping from.
691 const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first,
692 ToFile->getSize(), 0);
694 Diags.Report(diag::err_fe_remap_missing_from_file)
699 // Override the contents of the "from" file with the contents of
701 SourceMgr.overrideFileContents(FromFile, ToFile);
704 SourceMgr.setOverridenFilesKeepOriginalName(
705 InitOpts.RemappedFilesKeepOriginalName);
708 /// InitializePreprocessor - Initialize the preprocessor getting it and the
709 /// environment ready to process a single file. This returns true on error.
711 void clang::InitializePreprocessor(Preprocessor &PP,
712 const PreprocessorOptions &InitOpts,
713 const HeaderSearchOptions &HSOpts,
714 const FrontendOptions &FEOpts) {
715 const LangOptions &LangOpts = PP.getLangOpts();
716 std::string PredefineBuffer;
717 PredefineBuffer.reserve(4080);
718 llvm::raw_string_ostream Predefines(PredefineBuffer);
719 MacroBuilder Builder(Predefines);
721 InitializeFileRemapping(PP.getDiagnostics(), PP.getSourceManager(),
722 PP.getFileManager(), InitOpts);
724 // Emit line markers for various builtin sections of the file. We don't do
725 // this in asm preprocessor mode, because "# 4" is not a line marker directive
727 if (!PP.getLangOpts().AsmPreprocessor)
728 Builder.append("# 1 \"<built-in>\" 3");
730 // Install things like __POWERPC__, __GNUC__, etc into the macro table.
731 if (InitOpts.UsePredefines) {
732 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder);
734 // Install definitions to make Objective-C++ ARC work well with various
735 // C++ Standard Library implementations.
736 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && LangOpts.ObjCAutoRefCount) {
737 switch (InitOpts.ObjCXXARCStandardLibrary) {
742 case ARCXX_libstdcxx:
743 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder);
749 // Even with predefines off, some macros are still predefined.
750 // These should all be defined in the preprocessor according to the
751 // current language configuration.
752 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(),
755 // Add on the predefines from the driver. Wrap in a #line directive to report
756 // that they come from the command line.
757 if (!PP.getLangOpts().AsmPreprocessor)
758 Builder.append("# 1 \"<command line>\" 1");
760 // Process #define's and #undef's in the order they are given.
761 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) {
762 if (InitOpts.Macros[i].second) // isUndef
763 Builder.undefineMacro(InitOpts.Macros[i].first);
765 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first,
766 PP.getDiagnostics());
769 // If -imacros are specified, include them now. These are processed before
770 // any -include directives.
771 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
772 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i],
773 PP.getFileManager());
775 // Process -include directives.
776 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
777 const std::string &Path = InitOpts.Includes[i];
778 if (Path == InitOpts.ImplicitPTHInclude)
779 AddImplicitIncludePTH(Builder, PP, Path);
780 else if (Path == InitOpts.ImplicitPCHInclude)
781 AddImplicitIncludePCH(Builder, PP, Path);
783 AddImplicitInclude(Builder, Path, PP.getFileManager());
786 // Exit the command line and go back to <built-in> (2 is LC_LEAVE).
787 if (!PP.getLangOpts().AsmPreprocessor)
788 Builder.append("# 1 \"<built-in>\" 2");
790 // Instruct the preprocessor to skip the preamble.
791 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first,
792 InitOpts.PrecompiledPreambleBytes.second);
794 // Copy PredefinedBuffer into the Preprocessor.
795 PP.setPredefines(Predefines.str());
797 // Initialize the header search object.
798 ApplyHeaderSearchOptions(PP.getHeaderSearchInfo(), HSOpts,
800 PP.getTargetInfo().getTriple());