clang  8.0.0svn
InitPreprocessor.cpp
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1 //===--- 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 
17 #include "clang/Basic/SyncScope.h"
18 #include "clang/Basic/TargetInfo.h"
19 #include "clang/Basic/Version.h"
22 #include "clang/Frontend/Utils.h"
23 #include "clang/Lex/HeaderSearch.h"
24 #include "clang/Lex/PTHManager.h"
25 #include "clang/Lex/Preprocessor.h"
28 #include "llvm/ADT/APFloat.h"
29 using namespace clang;
30 
31 static bool MacroBodyEndsInBackslash(StringRef MacroBody) {
32  while (!MacroBody.empty() && isWhitespace(MacroBody.back()))
33  MacroBody = MacroBody.drop_back();
34  return !MacroBody.empty() && MacroBody.back() == '\\';
35 }
36 
37 // Append a #define line to Buf for Macro. Macro should be of the form XXX,
38 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
39 // "#define XXX Y z W". To get a #define with no value, use "XXX=".
40 static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro,
41  DiagnosticsEngine &Diags) {
42  std::pair<StringRef, StringRef> MacroPair = Macro.split('=');
43  StringRef MacroName = MacroPair.first;
44  StringRef MacroBody = MacroPair.second;
45  if (MacroName.size() != Macro.size()) {
46  // Per GCC -D semantics, the macro ends at \n if it exists.
47  StringRef::size_type End = MacroBody.find_first_of("\n\r");
48  if (End != StringRef::npos)
49  Diags.Report(diag::warn_fe_macro_contains_embedded_newline)
50  << MacroName;
51  MacroBody = MacroBody.substr(0, End);
52  // We handle macro bodies which end in a backslash by appending an extra
53  // backslash+newline. This makes sure we don't accidentally treat the
54  // backslash as a line continuation marker.
55  if (MacroBodyEndsInBackslash(MacroBody))
56  Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n");
57  else
58  Builder.defineMacro(MacroName, MacroBody);
59  } else {
60  // Push "macroname 1".
61  Builder.defineMacro(Macro);
62  }
63 }
64 
65 /// AddImplicitInclude - Add an implicit \#include of the specified file to the
66 /// predefines buffer.
67 /// As these includes are generated by -include arguments the header search
68 /// logic is going to search relatively to the current working directory.
69 static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) {
70  Builder.append(Twine("#include \"") + File + "\"");
71 }
72 
73 static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) {
74  Builder.append(Twine("#__include_macros \"") + File + "\"");
75  // Marker token to stop the __include_macros fetch loop.
76  Builder.append("##"); // ##?
77 }
78 
79 /// AddImplicitIncludePTH - Add an implicit \#include using the original file
80 /// used to generate a PTH cache.
82  StringRef ImplicitIncludePTH) {
83  PTHManager *P = PP.getPTHManager();
84  // Null check 'P' in the corner case where it couldn't be created.
85  const char *OriginalFile = P ? P->getOriginalSourceFile() : nullptr;
86 
87  if (!OriginalFile) {
88  PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header)
89  << ImplicitIncludePTH;
90  return;
91  }
92 
93  AddImplicitInclude(Builder, OriginalFile);
94 }
95 
96 /// Add an implicit \#include using the original file used to generate
97 /// a PCH file.
99  const PCHContainerReader &PCHContainerRdr,
100  StringRef ImplicitIncludePCH) {
101  std::string OriginalFile =
102  ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(),
103  PCHContainerRdr, PP.getDiagnostics());
104  if (OriginalFile.empty())
105  return;
106 
107  AddImplicitInclude(Builder, OriginalFile);
108 }
109 
110 /// PickFP - This is used to pick a value based on the FP semantics of the
111 /// specified FP model.
112 template <typename T>
113 static T PickFP(const llvm::fltSemantics *Sem, T IEEEHalfVal, T IEEESingleVal,
114  T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal,
115  T IEEEQuadVal) {
116  if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEhalf())
117  return IEEEHalfVal;
118  if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle())
119  return IEEESingleVal;
120  if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble())
121  return IEEEDoubleVal;
122  if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended())
123  return X87DoubleExtendedVal;
124  if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble())
125  return PPCDoubleDoubleVal;
126  assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad());
127  return IEEEQuadVal;
128 }
129 
130 static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix,
131  const llvm::fltSemantics *Sem, StringRef Ext) {
132  const char *DenormMin, *Epsilon, *Max, *Min;
133  DenormMin = PickFP(Sem, "5.9604644775390625e-8", "1.40129846e-45",
134  "4.9406564584124654e-324", "3.64519953188247460253e-4951",
135  "4.94065645841246544176568792868221e-324",
136  "6.47517511943802511092443895822764655e-4966");
137  int Digits = PickFP(Sem, 3, 6, 15, 18, 31, 33);
138  int DecimalDigits = PickFP(Sem, 5, 9, 17, 21, 33, 36);
139  Epsilon = PickFP(Sem, "9.765625e-4", "1.19209290e-7",
140  "2.2204460492503131e-16", "1.08420217248550443401e-19",
141  "4.94065645841246544176568792868221e-324",
142  "1.92592994438723585305597794258492732e-34");
143  int MantissaDigits = PickFP(Sem, 11, 24, 53, 64, 106, 113);
144  int Min10Exp = PickFP(Sem, -13, -37, -307, -4931, -291, -4931);
145  int Max10Exp = PickFP(Sem, 4, 38, 308, 4932, 308, 4932);
146  int MinExp = PickFP(Sem, -14, -125, -1021, -16381, -968, -16381);
147  int MaxExp = PickFP(Sem, 15, 128, 1024, 16384, 1024, 16384);
148  Min = PickFP(Sem, "6.103515625e-5", "1.17549435e-38", "2.2250738585072014e-308",
149  "3.36210314311209350626e-4932",
150  "2.00416836000897277799610805135016e-292",
151  "3.36210314311209350626267781732175260e-4932");
152  Max = PickFP(Sem, "6.5504e+4", "3.40282347e+38", "1.7976931348623157e+308",
153  "1.18973149535723176502e+4932",
154  "1.79769313486231580793728971405301e+308",
155  "1.18973149535723176508575932662800702e+4932");
156 
157  SmallString<32> DefPrefix;
158  DefPrefix = "__";
159  DefPrefix += Prefix;
160  DefPrefix += "_";
161 
162  Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext);
163  Builder.defineMacro(DefPrefix + "HAS_DENORM__");
164  Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits));
165  Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits));
166  Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext);
167  Builder.defineMacro(DefPrefix + "HAS_INFINITY__");
168  Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__");
169  Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits));
170 
171  Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp));
172  Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp));
173  Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext);
174 
175  Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")");
176  Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")");
177  Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext);
178 }
179 
180 
181 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro
182 /// named MacroName with the max value for a type with width 'TypeWidth' a
183 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL).
184 static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth,
185  StringRef ValSuffix, bool isSigned,
186  MacroBuilder &Builder) {
187  llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth)
188  : llvm::APInt::getMaxValue(TypeWidth);
189  Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix);
190 }
191 
192 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine
193 /// the width, suffix, and signedness of the given type
194 static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty,
195  const TargetInfo &TI, MacroBuilder &Builder) {
196  DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty),
197  TI.isTypeSigned(Ty), Builder);
198 }
199 
200 static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty,
201  const TargetInfo &TI, MacroBuilder &Builder) {
202  bool IsSigned = TI.isTypeSigned(Ty);
203  StringRef FmtModifier = TI.getTypeFormatModifier(Ty);
204  for (const char *Fmt = IsSigned ? "di" : "ouxX"; *Fmt; ++Fmt) {
205  Builder.defineMacro(Prefix + "_FMT" + Twine(*Fmt) + "__",
206  Twine("\"") + FmtModifier + Twine(*Fmt) + "\"");
207  }
208 }
209 
210 static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty,
211  MacroBuilder &Builder) {
212  Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty));
213 }
214 
215 static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty,
216  const TargetInfo &TI, MacroBuilder &Builder) {
217  Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty)));
218 }
219 
220 static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth,
221  const TargetInfo &TI, MacroBuilder &Builder) {
222  Builder.defineMacro(MacroName,
223  Twine(BitWidth / TI.getCharWidth()));
224 }
225 
227  const TargetInfo &TI,
228  MacroBuilder &Builder) {
229  int TypeWidth = TI.getTypeWidth(Ty);
230  bool IsSigned = TI.isTypeSigned(Ty);
231 
232  // Use the target specified int64 type, when appropriate, so that [u]int64_t
233  // ends up being defined in terms of the correct type.
234  if (TypeWidth == 64)
235  Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type();
236 
237  const char *Prefix = IsSigned ? "__INT" : "__UINT";
238 
239  DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
240  DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder);
241 
242  StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty));
243  Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix);
244 }
245 
247  const TargetInfo &TI,
248  MacroBuilder &Builder) {
249  int TypeWidth = TI.getTypeWidth(Ty);
250  bool IsSigned = TI.isTypeSigned(Ty);
251 
252  // Use the target specified int64 type, when appropriate, so that [u]int64_t
253  // ends up being defined in terms of the correct type.
254  if (TypeWidth == 64)
255  Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type();
256 
257  const char *Prefix = IsSigned ? "__INT" : "__UINT";
258  DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
259 }
260 
261 static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned,
262  const TargetInfo &TI,
263  MacroBuilder &Builder) {
264  TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned);
265  if (Ty == TargetInfo::NoInt)
266  return;
267 
268  const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST";
269  DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
270  DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
271  DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder);
272 }
273 
274 static void DefineFastIntType(unsigned TypeWidth, bool IsSigned,
275  const TargetInfo &TI, MacroBuilder &Builder) {
276  // stdint.h currently defines the fast int types as equivalent to the least
277  // types.
278  TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned);
279  if (Ty == TargetInfo::NoInt)
280  return;
281 
282  const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST";
283  DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
284  DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
285 
286  DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder);
287 }
288 
289 
290 /// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with
291 /// the specified properties.
292 static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign,
293  unsigned InlineWidth) {
294  // Fully-aligned, power-of-2 sizes no larger than the inline
295  // width will be inlined as lock-free operations.
296  if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 &&
297  TypeWidth <= InlineWidth)
298  return "2"; // "always lock free"
299  // We cannot be certain what operations the lib calls might be
300  // able to implement as lock-free on future processors.
301  return "1"; // "sometimes lock free"
302 }
303 
304 /// Add definitions required for a smooth interaction between
305 /// Objective-C++ automated reference counting and libstdc++ (4.2).
306 static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts,
307  MacroBuilder &Builder) {
308  Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR");
309 
310  std::string Result;
311  {
312  // Provide specializations for the __is_scalar type trait so that
313  // lifetime-qualified objects are not considered "scalar" types, which
314  // libstdc++ uses as an indicator of the presence of trivial copy, assign,
315  // default-construct, and destruct semantics (none of which hold for
316  // lifetime-qualified objects in ARC).
317  llvm::raw_string_ostream Out(Result);
318 
319  Out << "namespace std {\n"
320  << "\n"
321  << "struct __true_type;\n"
322  << "struct __false_type;\n"
323  << "\n";
324 
325  Out << "template<typename _Tp> struct __is_scalar;\n"
326  << "\n";
327 
328  if (LangOpts.ObjCAutoRefCount) {
329  Out << "template<typename _Tp>\n"
330  << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n"
331  << " enum { __value = 0 };\n"
332  << " typedef __false_type __type;\n"
333  << "};\n"
334  << "\n";
335  }
336 
337  if (LangOpts.ObjCWeak) {
338  Out << "template<typename _Tp>\n"
339  << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n"
340  << " enum { __value = 0 };\n"
341  << " typedef __false_type __type;\n"
342  << "};\n"
343  << "\n";
344  }
345 
346  if (LangOpts.ObjCAutoRefCount) {
347  Out << "template<typename _Tp>\n"
348  << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))"
349  << " _Tp> {\n"
350  << " enum { __value = 0 };\n"
351  << " typedef __false_type __type;\n"
352  << "};\n"
353  << "\n";
354  }
355 
356  Out << "}\n";
357  }
358  Builder.append(Result);
359 }
360 
362  const LangOptions &LangOpts,
363  const FrontendOptions &FEOpts,
364  MacroBuilder &Builder) {
365  if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP)
366  Builder.defineMacro("__STDC__");
367  if (LangOpts.Freestanding)
368  Builder.defineMacro("__STDC_HOSTED__", "0");
369  else
370  Builder.defineMacro("__STDC_HOSTED__");
371 
372  if (!LangOpts.CPlusPlus) {
373  if (LangOpts.C17)
374  Builder.defineMacro("__STDC_VERSION__", "201710L");
375  else if (LangOpts.C11)
376  Builder.defineMacro("__STDC_VERSION__", "201112L");
377  else if (LangOpts.C99)
378  Builder.defineMacro("__STDC_VERSION__", "199901L");
379  else if (!LangOpts.GNUMode && LangOpts.Digraphs)
380  Builder.defineMacro("__STDC_VERSION__", "199409L");
381  } else {
382  // FIXME: Use correct value for C++20.
383  if (LangOpts.CPlusPlus2a)
384  Builder.defineMacro("__cplusplus", "201707L");
385  // C++17 [cpp.predefined]p1:
386  // The name __cplusplus is defined to the value 201703L when compiling a
387  // C++ translation unit.
388  else if (LangOpts.CPlusPlus17)
389  Builder.defineMacro("__cplusplus", "201703L");
390  // C++1y [cpp.predefined]p1:
391  // The name __cplusplus is defined to the value 201402L when compiling a
392  // C++ translation unit.
393  else if (LangOpts.CPlusPlus14)
394  Builder.defineMacro("__cplusplus", "201402L");
395  // C++11 [cpp.predefined]p1:
396  // The name __cplusplus is defined to the value 201103L when compiling a
397  // C++ translation unit.
398  else if (LangOpts.CPlusPlus11)
399  Builder.defineMacro("__cplusplus", "201103L");
400  // C++03 [cpp.predefined]p1:
401  // The name __cplusplus is defined to the value 199711L when compiling a
402  // C++ translation unit.
403  else
404  Builder.defineMacro("__cplusplus", "199711L");
405 
406  // C++1z [cpp.predefined]p1:
407  // An integer literal of type std::size_t whose value is the alignment
408  // guaranteed by a call to operator new(std::size_t)
409  //
410  // We provide this in all language modes, since it seems generally useful.
411  Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__",
412  Twine(TI.getNewAlign() / TI.getCharWidth()) +
414  }
415 
416  // In C11 these are environment macros. In C++11 they are only defined
417  // as part of <cuchar>. To prevent breakage when mixing C and C++
418  // code, define these macros unconditionally. We can define them
419  // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit
420  // and 32-bit character literals.
421  Builder.defineMacro("__STDC_UTF_16__", "1");
422  Builder.defineMacro("__STDC_UTF_32__", "1");
423 
424  if (LangOpts.ObjC1)
425  Builder.defineMacro("__OBJC__");
426 
427  // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros.
428  if (LangOpts.OpenCL) {
429  if (LangOpts.CPlusPlus) {
430  if (LangOpts.OpenCLCPlusPlusVersion == 100)
431  Builder.defineMacro("__OPENCL_CPP_VERSION__", "100");
432  else
433  llvm_unreachable("Unsupported OpenCL C++ version");
434  Builder.defineMacro("__CL_CPP_VERSION_1_0__", "100");
435  } else {
436  // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the
437  // language standard with which the program is compiled. __OPENCL_VERSION__
438  // is for the OpenCL version supported by the OpenCL device, which is not
439  // necessarily the language standard with which the program is compiled.
440  // A shared OpenCL header file requires a macro to indicate the language
441  // standard. As a workaround, __OPENCL_C_VERSION__ is defined for
442  // OpenCL v1.0 and v1.1.
443  switch (LangOpts.OpenCLVersion) {
444  case 100:
445  Builder.defineMacro("__OPENCL_C_VERSION__", "100");
446  break;
447  case 110:
448  Builder.defineMacro("__OPENCL_C_VERSION__", "110");
449  break;
450  case 120:
451  Builder.defineMacro("__OPENCL_C_VERSION__", "120");
452  break;
453  case 200:
454  Builder.defineMacro("__OPENCL_C_VERSION__", "200");
455  break;
456  default:
457  llvm_unreachable("Unsupported OpenCL version");
458  }
459  Builder.defineMacro("CL_VERSION_1_0", "100");
460  Builder.defineMacro("CL_VERSION_1_1", "110");
461  Builder.defineMacro("CL_VERSION_1_2", "120");
462  Builder.defineMacro("CL_VERSION_2_0", "200");
463 
464  if (TI.isLittleEndian())
465  Builder.defineMacro("__ENDIAN_LITTLE__");
466 
467  if (LangOpts.FastRelaxedMath)
468  Builder.defineMacro("__FAST_RELAXED_MATH__");
469  }
470  }
471  // Not "standard" per se, but available even with the -undef flag.
472  if (LangOpts.AsmPreprocessor)
473  Builder.defineMacro("__ASSEMBLER__");
474  if (LangOpts.CUDA && !LangOpts.HIP)
475  Builder.defineMacro("__CUDA__");
476  if (LangOpts.HIP) {
477  Builder.defineMacro("__HIP__");
478  Builder.defineMacro("__HIPCC__");
479  if (LangOpts.CUDAIsDevice)
480  Builder.defineMacro("__HIP_DEVICE_COMPILE__");
481  }
482 }
483 
484 /// Initialize the predefined C++ language feature test macros defined in
485 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations".
487  MacroBuilder &Builder) {
488  // C++98 features.
489  if (LangOpts.RTTI)
490  Builder.defineMacro("__cpp_rtti", "199711L");
491  if (LangOpts.CXXExceptions)
492  Builder.defineMacro("__cpp_exceptions", "199711L");
493 
494  // C++11 features.
495  if (LangOpts.CPlusPlus11) {
496  Builder.defineMacro("__cpp_unicode_characters", "200704L");
497  Builder.defineMacro("__cpp_raw_strings", "200710L");
498  Builder.defineMacro("__cpp_unicode_literals", "200710L");
499  Builder.defineMacro("__cpp_user_defined_literals", "200809L");
500  Builder.defineMacro("__cpp_lambdas", "200907L");
501  Builder.defineMacro("__cpp_constexpr",
502  LangOpts.CPlusPlus17 ? "201603L" :
503  LangOpts.CPlusPlus14 ? "201304L" : "200704");
504  Builder.defineMacro("__cpp_range_based_for",
505  LangOpts.CPlusPlus17 ? "201603L" : "200907");
506  Builder.defineMacro("__cpp_static_assert",
507  LangOpts.CPlusPlus17 ? "201411L" : "200410");
508  Builder.defineMacro("__cpp_decltype", "200707L");
509  Builder.defineMacro("__cpp_attributes", "200809L");
510  Builder.defineMacro("__cpp_rvalue_references", "200610L");
511  Builder.defineMacro("__cpp_variadic_templates", "200704L");
512  Builder.defineMacro("__cpp_initializer_lists", "200806L");
513  Builder.defineMacro("__cpp_delegating_constructors", "200604L");
514  Builder.defineMacro("__cpp_nsdmi", "200809L");
515  Builder.defineMacro("__cpp_inheriting_constructors", "201511L");
516  Builder.defineMacro("__cpp_ref_qualifiers", "200710L");
517  Builder.defineMacro("__cpp_alias_templates", "200704L");
518  }
519  if (LangOpts.ThreadsafeStatics)
520  Builder.defineMacro("__cpp_threadsafe_static_init", "200806L");
521 
522  // C++14 features.
523  if (LangOpts.CPlusPlus14) {
524  Builder.defineMacro("__cpp_binary_literals", "201304L");
525  Builder.defineMacro("__cpp_digit_separators", "201309L");
526  Builder.defineMacro("__cpp_init_captures", "201304L");
527  Builder.defineMacro("__cpp_generic_lambdas", "201304L");
528  Builder.defineMacro("__cpp_decltype_auto", "201304L");
529  Builder.defineMacro("__cpp_return_type_deduction", "201304L");
530  Builder.defineMacro("__cpp_aggregate_nsdmi", "201304L");
531  Builder.defineMacro("__cpp_variable_templates", "201304L");
532  }
533  if (LangOpts.SizedDeallocation)
534  Builder.defineMacro("__cpp_sized_deallocation", "201309L");
535 
536  // C++17 features.
537  if (LangOpts.CPlusPlus17) {
538  Builder.defineMacro("__cpp_hex_float", "201603L");
539  Builder.defineMacro("__cpp_inline_variables", "201606L");
540  Builder.defineMacro("__cpp_noexcept_function_type", "201510L");
541  Builder.defineMacro("__cpp_capture_star_this", "201603L");
542  Builder.defineMacro("__cpp_if_constexpr", "201606L");
543  Builder.defineMacro("__cpp_deduction_guides", "201703L");
544  Builder.defineMacro("__cpp_template_auto", "201606L"); // (old name)
545  Builder.defineMacro("__cpp_namespace_attributes", "201411L");
546  Builder.defineMacro("__cpp_enumerator_attributes", "201411L");
547  Builder.defineMacro("__cpp_nested_namespace_definitions", "201411L");
548  Builder.defineMacro("__cpp_variadic_using", "201611L");
549  Builder.defineMacro("__cpp_aggregate_bases", "201603L");
550  Builder.defineMacro("__cpp_structured_bindings", "201606L");
551  Builder.defineMacro("__cpp_nontype_template_args", "201411L");
552  Builder.defineMacro("__cpp_fold_expressions", "201603L");
553  Builder.defineMacro("__cpp_guaranteed_copy_elision", "201606L");
554  Builder.defineMacro("__cpp_nontype_template_parameter_auto", "201606L");
555  }
556  if (LangOpts.AlignedAllocation && !LangOpts.AlignedAllocationUnavailable)
557  Builder.defineMacro("__cpp_aligned_new", "201606L");
558  if (LangOpts.RelaxedTemplateTemplateArgs)
559  Builder.defineMacro("__cpp_template_template_args", "201611L");
560 
561  // TS features.
562  if (LangOpts.ConceptsTS)
563  Builder.defineMacro("__cpp_experimental_concepts", "1L");
564  if (LangOpts.CoroutinesTS)
565  Builder.defineMacro("__cpp_coroutines", "201703L");
566 
567  // Potential future breaking changes.
568  if (LangOpts.Char8)
569  Builder.defineMacro("__cpp_char8_t", "201803L");
570 }
571 
573  const LangOptions &LangOpts,
574  const FrontendOptions &FEOpts,
575  MacroBuilder &Builder) {
576  // Compiler version introspection macros.
577  Builder.defineMacro("__llvm__"); // LLVM Backend
578  Builder.defineMacro("__clang__"); // Clang Frontend
579 #define TOSTR2(X) #X
580 #define TOSTR(X) TOSTR2(X)
581  Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR));
582  Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR));
583  Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL));
584 #undef TOSTR
585 #undef TOSTR2
586  Builder.defineMacro("__clang_version__",
587  "\"" CLANG_VERSION_STRING " "
588  + getClangFullRepositoryVersion() + "\"");
589  if (!LangOpts.MSVCCompat) {
590  // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're
591  // not compiling for MSVC compatibility
592  Builder.defineMacro("__GNUC_MINOR__", "2");
593  Builder.defineMacro("__GNUC_PATCHLEVEL__", "1");
594  Builder.defineMacro("__GNUC__", "4");
595  Builder.defineMacro("__GXX_ABI_VERSION", "1002");
596  }
597 
598  // Define macros for the C11 / C++11 memory orderings
599  Builder.defineMacro("__ATOMIC_RELAXED", "0");
600  Builder.defineMacro("__ATOMIC_CONSUME", "1");
601  Builder.defineMacro("__ATOMIC_ACQUIRE", "2");
602  Builder.defineMacro("__ATOMIC_RELEASE", "3");
603  Builder.defineMacro("__ATOMIC_ACQ_REL", "4");
604  Builder.defineMacro("__ATOMIC_SEQ_CST", "5");
605 
606  // Define macros for the OpenCL memory scope.
607  // The values should match AtomicScopeOpenCLModel::ID enum.
608  static_assert(
609  static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 &&
610  static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 &&
611  static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 &&
612  static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4,
613  "Invalid OpenCL memory scope enum definition");
614  Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0");
615  Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1");
616  Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2");
617  Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3");
618  Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4");
619 
620  // Support for #pragma redefine_extname (Sun compatibility)
621  Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1");
622 
623  // As sad as it is, enough software depends on the __VERSION__ for version
624  // checks that it is necessary to report 4.2.1 (the base GCC version we claim
625  // compatibility with) first.
626  Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " +
627  Twine(getClangFullCPPVersion()) + "\"");
628 
629  // Initialize language-specific preprocessor defines.
630 
631  // Standard conforming mode?
632  if (!LangOpts.GNUMode && !LangOpts.MSVCCompat)
633  Builder.defineMacro("__STRICT_ANSI__");
634 
635  if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11)
636  Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");
637 
638  if (LangOpts.ObjC1) {
639  if (LangOpts.ObjCRuntime.isNonFragile()) {
640  Builder.defineMacro("__OBJC2__");
641 
642  if (LangOpts.ObjCExceptions)
643  Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
644  }
645 
646  if (LangOpts.getGC() != LangOptions::NonGC)
647  Builder.defineMacro("__OBJC_GC__");
648 
649  if (LangOpts.ObjCRuntime.isNeXTFamily())
650  Builder.defineMacro("__NEXT_RUNTIME__");
651 
652  if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::GNUstep) {
653  auto version = LangOpts.ObjCRuntime.getVersion();
654  std::string versionString = "1";
655  // Don't rely on the tuple argument, because we can be asked to target
656  // later ABIs than we actually support, so clamp these values to those
657  // currently supported
658  if (version >= VersionTuple(2, 0))
659  Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__", "20");
660  else
661  Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__",
662  "1" + Twine(std::min(8U, version.getMinor().getValueOr(0))));
663  }
664 
665  if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) {
666  VersionTuple tuple = LangOpts.ObjCRuntime.getVersion();
667 
668  unsigned minor = 0;
669  if (tuple.getMinor().hasValue())
670  minor = tuple.getMinor().getValue();
671 
672  unsigned subminor = 0;
673  if (tuple.getSubminor().hasValue())
674  subminor = tuple.getSubminor().getValue();
675 
676  Builder.defineMacro("__OBJFW_RUNTIME_ABI__",
677  Twine(tuple.getMajor() * 10000 + minor * 100 +
678  subminor));
679  }
680 
681  Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))");
682  Builder.defineMacro("IBOutletCollection(ClassName)",
683  "__attribute__((iboutletcollection(ClassName)))");
684  Builder.defineMacro("IBAction", "void)__attribute__((ibaction)");
685  Builder.defineMacro("IBInspectable", "");
686  Builder.defineMacro("IB_DESIGNABLE", "");
687  }
688 
689  // Define a macro that describes the Objective-C boolean type even for C
690  // and C++ since BOOL can be used from non Objective-C code.
691  Builder.defineMacro("__OBJC_BOOL_IS_BOOL",
692  Twine(TI.useSignedCharForObjCBool() ? "0" : "1"));
693 
694  if (LangOpts.CPlusPlus)
695  InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder);
696 
697  // darwin_constant_cfstrings controls this. This is also dependent
698  // on other things like the runtime I believe. This is set even for C code.
699  if (!LangOpts.NoConstantCFStrings)
700  Builder.defineMacro("__CONSTANT_CFSTRINGS__");
701 
702  if (LangOpts.ObjC2)
703  Builder.defineMacro("OBJC_NEW_PROPERTIES");
704 
705  if (LangOpts.PascalStrings)
706  Builder.defineMacro("__PASCAL_STRINGS__");
707 
708  if (LangOpts.Blocks) {
709  Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))");
710  Builder.defineMacro("__BLOCKS__");
711  }
712 
713  if (!LangOpts.MSVCCompat && LangOpts.Exceptions)
714  Builder.defineMacro("__EXCEPTIONS");
715  if (!LangOpts.MSVCCompat && LangOpts.RTTI)
716  Builder.defineMacro("__GXX_RTTI");
717 
718  if (LangOpts.SjLjExceptions)
719  Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__");
720  else if (LangOpts.SEHExceptions)
721  Builder.defineMacro("__SEH__");
722  else if (LangOpts.DWARFExceptions &&
723  (TI.getTriple().isThumb() || TI.getTriple().isARM()))
724  Builder.defineMacro("__ARM_DWARF_EH__");
725 
726  if (LangOpts.Deprecated)
727  Builder.defineMacro("__DEPRECATED");
728 
729  if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) {
730  Builder.defineMacro("__GNUG__", "4");
731  Builder.defineMacro("__GXX_WEAK__");
732  Builder.defineMacro("__private_extern__", "extern");
733  }
734 
735  if (LangOpts.MicrosoftExt) {
736  if (LangOpts.WChar) {
737  // wchar_t supported as a keyword.
738  Builder.defineMacro("_WCHAR_T_DEFINED");
739  Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED");
740  }
741  }
742 
743  if (LangOpts.Optimize)
744  Builder.defineMacro("__OPTIMIZE__");
745  if (LangOpts.OptimizeSize)
746  Builder.defineMacro("__OPTIMIZE_SIZE__");
747 
748  if (LangOpts.FastMath)
749  Builder.defineMacro("__FAST_MATH__");
750 
751  // Initialize target-specific preprocessor defines.
752 
753  // __BYTE_ORDER__ was added in GCC 4.6. It's analogous
754  // to the macro __BYTE_ORDER (no trailing underscores)
755  // from glibc's <endian.h> header.
756  // We don't support the PDP-11 as a target, but include
757  // the define so it can still be compared against.
758  Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234");
759  Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321");
760  Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412");
761  if (TI.isBigEndian()) {
762  Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__");
763  Builder.defineMacro("__BIG_ENDIAN__");
764  } else {
765  Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__");
766  Builder.defineMacro("__LITTLE_ENDIAN__");
767  }
768 
769  if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64
770  && TI.getIntWidth() == 32) {
771  Builder.defineMacro("_LP64");
772  Builder.defineMacro("__LP64__");
773  }
774 
775  if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32
776  && TI.getIntWidth() == 32) {
777  Builder.defineMacro("_ILP32");
778  Builder.defineMacro("__ILP32__");
779  }
780 
781  // Define type sizing macros based on the target properties.
782  assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far");
783  Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth()));
784 
785  DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder);
786  DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder);
787  DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder);
788  DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder);
789  DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder);
790  DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder);
791  DefineTypeSize("__WINT_MAX__", TI.getWIntType(), TI, Builder);
792  DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder);
793  DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder);
794 
795  DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder);
796  DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder);
797  DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder);
798  DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder);
799 
800  DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder);
801  DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder);
802  DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder);
803  DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder);
804  DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder);
805  DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder);
806  DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder);
807  DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder);
808  DefineTypeSizeof("__SIZEOF_PTRDIFF_T__",
809  TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder);
810  DefineTypeSizeof("__SIZEOF_SIZE_T__",
811  TI.getTypeWidth(TI.getSizeType()), TI, Builder);
812  DefineTypeSizeof("__SIZEOF_WCHAR_T__",
813  TI.getTypeWidth(TI.getWCharType()), TI, Builder);
814  DefineTypeSizeof("__SIZEOF_WINT_T__",
815  TI.getTypeWidth(TI.getWIntType()), TI, Builder);
816  if (TI.hasInt128Type())
817  DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder);
818 
819  DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder);
820  DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder);
821  Builder.defineMacro("__INTMAX_C_SUFFIX__",
823  DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder);
824  DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder);
825  Builder.defineMacro("__UINTMAX_C_SUFFIX__",
827  DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder);
828  DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder);
829  DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder);
830  DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder);
831  DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder);
832  DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder);
833  DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder);
834  DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder);
835  DefineFmt("__SIZE", TI.getSizeType(), TI, Builder);
836  DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder);
837  DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder);
838  DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder);
839  DefineType("__WINT_TYPE__", TI.getWIntType(), Builder);
840  DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder);
841  DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder);
842  DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder);
843  DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder);
844  DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder);
845 
846  DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder);
847  DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder);
848  DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder);
849  DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder);
850 
851  DefineFloatMacros(Builder, "FLT16", &TI.getHalfFormat(), "F16");
852  DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F");
853  DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), "");
854  DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L");
855 
856  // Define a __POINTER_WIDTH__ macro for stdint.h.
857  Builder.defineMacro("__POINTER_WIDTH__",
858  Twine((int)TI.getPointerWidth(0)));
859 
860  // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc.
861  Builder.defineMacro("__BIGGEST_ALIGNMENT__",
862  Twine(TI.getSuitableAlign() / TI.getCharWidth()) );
863 
864  if (!LangOpts.CharIsSigned)
865  Builder.defineMacro("__CHAR_UNSIGNED__");
866 
868  Builder.defineMacro("__WCHAR_UNSIGNED__");
869 
871  Builder.defineMacro("__WINT_UNSIGNED__");
872 
873  // Define exact-width integer types for stdint.h
875 
876  if (TI.getShortWidth() > TI.getCharWidth())
878 
879  if (TI.getIntWidth() > TI.getShortWidth())
881 
882  if (TI.getLongWidth() > TI.getIntWidth())
884 
885  if (TI.getLongLongWidth() > TI.getLongWidth())
887 
891 
892  if (TI.getShortWidth() > TI.getCharWidth()) {
896  }
897 
898  if (TI.getIntWidth() > TI.getShortWidth()) {
902  }
903 
904  if (TI.getLongWidth() > TI.getIntWidth()) {
908  }
909 
910  if (TI.getLongLongWidth() > TI.getLongWidth()) {
914  }
915 
916  DefineLeastWidthIntType(8, true, TI, Builder);
917  DefineLeastWidthIntType(8, false, TI, Builder);
918  DefineLeastWidthIntType(16, true, TI, Builder);
919  DefineLeastWidthIntType(16, false, TI, Builder);
920  DefineLeastWidthIntType(32, true, TI, Builder);
921  DefineLeastWidthIntType(32, false, TI, Builder);
922  DefineLeastWidthIntType(64, true, TI, Builder);
923  DefineLeastWidthIntType(64, false, TI, Builder);
924 
925  DefineFastIntType(8, true, TI, Builder);
926  DefineFastIntType(8, false, TI, Builder);
927  DefineFastIntType(16, true, TI, Builder);
928  DefineFastIntType(16, false, TI, Builder);
929  DefineFastIntType(32, true, TI, Builder);
930  DefineFastIntType(32, false, TI, Builder);
931  DefineFastIntType(64, true, TI, Builder);
932  DefineFastIntType(64, false, TI, Builder);
933 
934  char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0};
935  Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix);
936 
937  if (LangOpts.FastMath || LangOpts.FiniteMathOnly)
938  Builder.defineMacro("__FINITE_MATH_ONLY__", "1");
939  else
940  Builder.defineMacro("__FINITE_MATH_ONLY__", "0");
941 
942  if (!LangOpts.MSVCCompat) {
943  if (LangOpts.GNUInline || LangOpts.CPlusPlus)
944  Builder.defineMacro("__GNUC_GNU_INLINE__");
945  else
946  Builder.defineMacro("__GNUC_STDC_INLINE__");
947 
948  // The value written by __atomic_test_and_set.
949  // FIXME: This is target-dependent.
950  Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1");
951  }
952 
953  auto addLockFreeMacros = [&](const llvm::Twine &Prefix) {
954  // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE.
955  unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth();
956 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \
957  Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \
958  getLockFreeValue(TI.get##Type##Width(), \
959  TI.get##Type##Align(), \
960  InlineWidthBits));
962  DEFINE_LOCK_FREE_MACRO(CHAR, Char);
963  if (LangOpts.Char8)
964  DEFINE_LOCK_FREE_MACRO(CHAR8_T, Char); // Treat char8_t like char.
965  DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16);
966  DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32);
967  DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar);
968  DEFINE_LOCK_FREE_MACRO(SHORT, Short);
969  DEFINE_LOCK_FREE_MACRO(INT, Int);
970  DEFINE_LOCK_FREE_MACRO(LONG, Long);
971  DEFINE_LOCK_FREE_MACRO(LLONG, LongLong);
972  Builder.defineMacro(Prefix + "POINTER_LOCK_FREE",
974  TI.getPointerAlign(0),
975  InlineWidthBits));
976 #undef DEFINE_LOCK_FREE_MACRO
977  };
978  addLockFreeMacros("__CLANG_ATOMIC_");
979  if (!LangOpts.MSVCCompat)
980  addLockFreeMacros("__GCC_ATOMIC_");
981 
982  if (LangOpts.NoInlineDefine)
983  Builder.defineMacro("__NO_INLINE__");
984 
985  if (unsigned PICLevel = LangOpts.PICLevel) {
986  Builder.defineMacro("__PIC__", Twine(PICLevel));
987  Builder.defineMacro("__pic__", Twine(PICLevel));
988  if (LangOpts.PIE) {
989  Builder.defineMacro("__PIE__", Twine(PICLevel));
990  Builder.defineMacro("__pie__", Twine(PICLevel));
991  }
992  }
993 
994  // Macros to control C99 numerics and <float.h>
995  Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod()));
996  Builder.defineMacro("__FLT_RADIX__", "2");
997  Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__");
998 
999  if (LangOpts.getStackProtector() == LangOptions::SSPOn)
1000  Builder.defineMacro("__SSP__");
1001  else if (LangOpts.getStackProtector() == LangOptions::SSPStrong)
1002  Builder.defineMacro("__SSP_STRONG__", "2");
1003  else if (LangOpts.getStackProtector() == LangOptions::SSPReq)
1004  Builder.defineMacro("__SSP_ALL__", "3");
1005 
1006  // Define a macro that exists only when using the static analyzer.
1007  if (FEOpts.ProgramAction == frontend::RunAnalysis)
1008  Builder.defineMacro("__clang_analyzer__");
1009 
1010  if (LangOpts.FastRelaxedMath)
1011  Builder.defineMacro("__FAST_RELAXED_MATH__");
1012 
1013  if (FEOpts.ProgramAction == frontend::RewriteObjC ||
1014  LangOpts.getGC() != LangOptions::NonGC) {
1015  Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
1016  Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))");
1017  Builder.defineMacro("__autoreleasing", "");
1018  Builder.defineMacro("__unsafe_unretained", "");
1019  } else if (LangOpts.ObjC1) {
1020  Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))");
1021  Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))");
1022  Builder.defineMacro("__autoreleasing",
1023  "__attribute__((objc_ownership(autoreleasing)))");
1024  Builder.defineMacro("__unsafe_unretained",
1025  "__attribute__((objc_ownership(none)))");
1026  }
1027 
1028  // On Darwin, there are __double_underscored variants of the type
1029  // nullability qualifiers.
1030  if (TI.getTriple().isOSDarwin()) {
1031  Builder.defineMacro("__nonnull", "_Nonnull");
1032  Builder.defineMacro("__null_unspecified", "_Null_unspecified");
1033  Builder.defineMacro("__nullable", "_Nullable");
1034  }
1035 
1036  // Add a macro to differentiate between regular iOS/tvOS/watchOS targets and
1037  // the corresponding simulator targets.
1038  if (TI.getTriple().isOSDarwin() && TI.getTriple().isSimulatorEnvironment())
1039  Builder.defineMacro("__APPLE_EMBEDDED_SIMULATOR__", "1");
1040 
1041  // OpenMP definition
1042  // OpenMP 2.2:
1043  // In implementations that support a preprocessor, the _OPENMP
1044  // macro name is defined to have the decimal value yyyymm where
1045  // yyyy and mm are the year and the month designations of the
1046  // version of the OpenMP API that the implementation support.
1047  if (!LangOpts.OpenMPSimd) {
1048  switch (LangOpts.OpenMP) {
1049  case 0:
1050  break;
1051  case 40:
1052  Builder.defineMacro("_OPENMP", "201307");
1053  break;
1054  case 45:
1055  Builder.defineMacro("_OPENMP", "201511");
1056  break;
1057  default:
1058  // Default version is OpenMP 3.1
1059  Builder.defineMacro("_OPENMP", "201107");
1060  break;
1061  }
1062  }
1063 
1064  // CUDA device path compilaton
1065  if (LangOpts.CUDAIsDevice && !LangOpts.HIP) {
1066  // The CUDA_ARCH value is set for the GPU target specified in the NVPTX
1067  // backend's target defines.
1068  Builder.defineMacro("__CUDA_ARCH__");
1069  }
1070 
1071  // We need to communicate this to our CUDA header wrapper, which in turn
1072  // informs the proper CUDA headers of this choice.
1073  if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) {
1074  Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__");
1075  }
1076 
1077  // OpenCL definitions.
1078  if (LangOpts.OpenCL) {
1079 #define OPENCLEXT(Ext) \
1080  if (TI.getSupportedOpenCLOpts().isSupported(#Ext, \
1081  LangOpts.OpenCLVersion)) \
1082  Builder.defineMacro(#Ext);
1083 #include "clang/Basic/OpenCLExtensions.def"
1084 
1085  auto Arch = TI.getTriple().getArch();
1086  if (Arch == llvm::Triple::spir || Arch == llvm::Triple::spir64)
1087  Builder.defineMacro("__IMAGE_SUPPORT__");
1088  }
1089 
1090  if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) {
1091  // For each extended integer type, g++ defines a macro mapping the
1092  // index of the type (0 in this case) in some list of extended types
1093  // to the type.
1094  Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128");
1095  Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128");
1096  }
1097 
1098  // Get other target #defines.
1099  TI.getTargetDefines(LangOpts, Builder);
1100 }
1101 
1102 /// InitializePreprocessor - Initialize the preprocessor getting it and the
1103 /// environment ready to process a single file. This returns true on error.
1104 ///
1106  Preprocessor &PP, const PreprocessorOptions &InitOpts,
1107  const PCHContainerReader &PCHContainerRdr,
1108  const FrontendOptions &FEOpts) {
1109  const LangOptions &LangOpts = PP.getLangOpts();
1110  std::string PredefineBuffer;
1111  PredefineBuffer.reserve(4080);
1112  llvm::raw_string_ostream Predefines(PredefineBuffer);
1113  MacroBuilder Builder(Predefines);
1114 
1115  // Emit line markers for various builtin sections of the file. We don't do
1116  // this in asm preprocessor mode, because "# 4" is not a line marker directive
1117  // in this mode.
1118  if (!PP.getLangOpts().AsmPreprocessor)
1119  Builder.append("# 1 \"<built-in>\" 3");
1120 
1121  // Install things like __POWERPC__, __GNUC__, etc into the macro table.
1122  if (InitOpts.UsePredefines) {
1123  // FIXME: This will create multiple definitions for most of the predefined
1124  // macros. This is not the right way to handle this.
1125  if ((LangOpts.CUDA || LangOpts.OpenMPIsDevice) && PP.getAuxTargetInfo())
1126  InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts,
1127  Builder);
1128 
1129  InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder);
1130 
1131  // Install definitions to make Objective-C++ ARC work well with various
1132  // C++ Standard Library implementations.
1133  if (LangOpts.ObjC1 && LangOpts.CPlusPlus &&
1134  (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) {
1135  switch (InitOpts.ObjCXXARCStandardLibrary) {
1136  case ARCXX_nolib:
1137  case ARCXX_libcxx:
1138  break;
1139 
1140  case ARCXX_libstdcxx:
1141  AddObjCXXARCLibstdcxxDefines(LangOpts, Builder);
1142  break;
1143  }
1144  }
1145  }
1146 
1147  // Even with predefines off, some macros are still predefined.
1148  // These should all be defined in the preprocessor according to the
1149  // current language configuration.
1151  FEOpts, Builder);
1152 
1153  // Add on the predefines from the driver. Wrap in a #line directive to report
1154  // that they come from the command line.
1155  if (!PP.getLangOpts().AsmPreprocessor)
1156  Builder.append("# 1 \"<command line>\" 1");
1157 
1158  // Process #define's and #undef's in the order they are given.
1159  for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) {
1160  if (InitOpts.Macros[i].second) // isUndef
1161  Builder.undefineMacro(InitOpts.Macros[i].first);
1162  else
1163  DefineBuiltinMacro(Builder, InitOpts.Macros[i].first,
1164  PP.getDiagnostics());
1165  }
1166 
1167  // Exit the command line and go back to <built-in> (2 is LC_LEAVE).
1168  if (!PP.getLangOpts().AsmPreprocessor)
1169  Builder.append("# 1 \"<built-in>\" 2");
1170 
1171  // If -imacros are specified, include them now. These are processed before
1172  // any -include directives.
1173  for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
1174  AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]);
1175 
1176  // Process -include-pch/-include-pth directives.
1177  if (!InitOpts.ImplicitPCHInclude.empty())
1178  AddImplicitIncludePCH(Builder, PP, PCHContainerRdr,
1179  InitOpts.ImplicitPCHInclude);
1180  if (!InitOpts.ImplicitPTHInclude.empty())
1181  AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude);
1182 
1183  // Process -include directives.
1184  for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
1185  const std::string &Path = InitOpts.Includes[i];
1186  AddImplicitInclude(Builder, Path);
1187  }
1188 
1189  // Instruct the preprocessor to skip the preamble.
1191  InitOpts.PrecompiledPreambleBytes.second);
1192 
1193  // Copy PredefinedBuffer into the Preprocessor.
1194  PP.setPredefines(Predefines.str());
1195 }
unsigned getTypeWidth(IntType T) const
Return the width (in bits) of the specified integer type enum.
Definition: TargetInfo.cpp:213
IntType getInt64Type() const
Definition: TargetInfo.h:291
unsigned getFloatWidth() const
getFloatWidth/Align/Format - Return the size/align/format of &#39;float&#39;.
Definition: TargetInfo.h:562
std::vector< std::pair< std::string, bool > > Macros
Defines the clang::MacroBuilder utility class.
unsigned getLongWidth() const
getLongWidth/Align - Return the size of &#39;signed long&#39; and &#39;unsigned long&#39; for this target...
Definition: TargetInfo.h:388
Defines the clang::FileManager interface and associated types.
unsigned getSuitableAlign() const
Return the alignment that is suitable for storing any object with a fundamental alignment requirement...
Definition: TargetInfo.h:522
bool isBigEndian() const
Definition: TargetInfo.h:1207
const llvm::Triple & getTriple() const
Returns the target triple of the primary target.
Definition: TargetInfo.h:949
Defines the SourceManager interface.
virtual IntType getLeastIntTypeByWidth(unsigned BitWidth, bool IsSigned) const
Return the smallest integer type with at least the specified width.
Definition: TargetInfo.cpp:244
FileManager & getFileManager() const
Definition: Preprocessor.h:830
static T PickFP(const llvm::fltSemantics *Sem, T IEEEHalfVal, T IEEESingleVal, T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, T IEEEQuadVal)
PickFP - This is used to pick a value based on the FP semantics of the specified FP model...
static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty, const TargetInfo &TI, MacroBuilder &Builder)
StringRef P
std::vector< std::string > Includes
static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File)
StringRef getOriginalSourceFile()
Retrieve the name of the original source file name for the primary module file.
Definition: ASTReader.h:1668
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1294
PreprocessorOptions - This class is used for passing the various options used in preprocessor initial...
unsigned getCharWidth() const
Definition: TargetInfo.h:370
std::string ImplicitPTHInclude
The implicit PTH input included at the start of the translation unit, or empty.
const llvm::fltSemantics & getHalfFormat() const
Definition: TargetInfo.h:559
static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth, const TargetInfo &TI, MacroBuilder &Builder)
void setPredefines(const char *P)
Set the predefines for this Preprocessor.
static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP, const PCHContainerReader &PCHContainerRdr, StringRef ImplicitIncludePCH)
Add an implicit #include using the original file used to generate a PCH file.
uint64_t getPointerWidth(unsigned AddrSpace) const
Return the width of pointers on this target, for the specified address space.
Definition: TargetInfo.h:348
#define TOSTR(X)
const char * getTypeConstantSuffix(IntType T) const
Return the constant suffix for the specified integer type enum.
Definition: TargetInfo.cpp:170
static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts, MacroBuilder &Builder)
Add definitions required for a smooth interaction between Objective-C++ automated reference counting ...
IntType getChar32Type() const
Definition: TargetInfo.h:290
unsigned getNewAlign() const
Return the largest alignment for which a suitably-sized allocation with &#39;::operator new(size_t)&#39; is g...
Definition: TargetInfo.h:537
const TargetInfo & getTargetInfo() const
Definition: Preprocessor.h:828
void undefineMacro(const Twine &Name)
Append a #undef line for Name.
Definition: MacroBuilder.h:36
IntType getSizeType() const
Definition: TargetInfo.h:258
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:50
const LangOptions & getLangOpts() const
Definition: Preprocessor.h:827
static bool isTypeSigned(IntType T)
Returns true if the type is signed; false otherwise.
Definition: TargetInfo.cpp:302
bool isNonFragile() const
Does this runtime follow the set of implied behaviors for a "non-fragile" ABI?
Definition: ObjCRuntime.h:82
bool isNeXTFamily() const
Is this runtime basically of the NeXT family of runtimes?
Definition: ObjCRuntime.h:135
LLVM_READONLY bool isWhitespace(unsigned char c)
Return true if this character is horizontal or vertical ASCII whitespace: &#39; &#39;, &#39;\t&#39;, &#39;\f&#39;, &#39;\v&#39;, &#39;\n&#39;, &#39;\r&#39;.
Definition: CharInfo.h:88
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:149
static void InitializePredefinedMacros(const TargetInfo &TI, const LangOptions &LangOpts, const FrontendOptions &FEOpts, MacroBuilder &Builder)
void append(const Twine &Str)
Directly append Str and a newline to the underlying buffer.
Definition: MacroBuilder.h:41
unsigned getShortWidth() const
Return the size of &#39;signed short&#39; and &#39;unsigned short&#39; for this target, in bits.
Definition: TargetInfo.h:375
static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, MacroBuilder &Builder)
const TargetInfo * getAuxTargetInfo() const
Definition: Preprocessor.h:829
static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, const llvm::fltSemantics *Sem, StringRef Ext)
static void AddImplicitInclude(MacroBuilder &Builder, StringRef File)
AddImplicitInclude - Add an implicit #include of the specified file to the predefines buffer...
static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty, const TargetInfo &TI, MacroBuilder &Builder)
This abstract interface provides operations for unwrapping containers for serialized ASTs (precompile...
bool isLittleEndian() const
Definition: TargetInfo.h:1208
const llvm::fltSemantics & getDoubleFormat() const
Definition: TargetInfo.h:569
static void DefineExactWidthIntType(TargetInfo::IntType Ty, const TargetInfo &TI, MacroBuilder &Builder)
const llvm::fltSemantics & getLongDoubleFormat() const
Definition: TargetInfo.h:575
Exposes information about the current target.
Definition: TargetInfo.h:54
static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned, const TargetInfo &TI, MacroBuilder &Builder)
SourceLocation End
IntType getUIntPtrType() const
Definition: TargetInfo.h:284
unsigned getIntWidth() const
getIntWidth/Align - Return the size of &#39;signed int&#39; and &#39;unsigned int&#39; for this target, in bits.
Definition: TargetInfo.h:383
static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth, StringRef ValSuffix, bool isSigned, MacroBuilder &Builder)
DefineTypeSize - Emit a macro to the predefines buffer that declares a macro named MacroName with the...
Defines version macros and version-related utility functions for Clang.
Defines the clang::Preprocessor interface.
IntType getChar16Type() const
Definition: TargetInfo.h:289
clang::ObjCRuntime ObjCRuntime
Definition: LangOptions.h:176
&#39;gnustep&#39; is the modern non-fragile GNUstep runtime.
Definition: ObjCRuntime.h:56
IntType getUIntMaxType() const
Definition: TargetInfo.h:274
unsigned getDoubleWidth() const
getDoubleWidth/Align/Format - Return the size/align/format of &#39;double&#39;.
Definition: TargetInfo.h:567
static const char * getTypeName(IntType T)
Return the user string for the specified integer type enum.
Definition: TargetInfo.cpp:152
static const char * getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign, unsigned InlineWidth)
Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with the specified properties...
static bool MacroBodyEndsInBackslash(StringRef MacroBody)
IntType getPtrDiffType(unsigned AddrSpace) const
Definition: TargetInfo.h:277
IntType getSigAtomicType() const
Definition: TargetInfo.h:295
static void DefineFastIntType(unsigned TypeWidth, bool IsSigned, const TargetInfo &TI, MacroBuilder &Builder)
static void InitializeStandardPredefinedMacros(const TargetInfo &TI, const LangOptions &LangOpts, const FrontendOptions &FEOpts, MacroBuilder &Builder)
unsigned getMaxAtomicInlineWidth() const
Return the maximum width lock-free atomic operation which can be inlined given the supported features...
Definition: TargetInfo.h:604
static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro, DiagnosticsEngine &Diags)
static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, MacroBuilder &Builder)
Initialize the predefined C++ language feature test macros defined in ISO/IEC JTC1/SC22/WG21 (C++) SD...
IntType getWIntType() const
Definition: TargetInfo.h:288
std::string ImplicitPCHInclude
The implicit PCH included at the start of the translation unit, or empty.
&#39;objfw&#39; is the Objective-C runtime included in ObjFW
Definition: ObjCRuntime.h:59
static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP, StringRef ImplicitIncludePTH)
AddImplicitIncludePTH - Add an implicit #include using the original file used to generate a PTH cache...
unsigned getLongLongWidth() const
getLongLongWidth/Align - Return the size of &#39;signed long long&#39; and &#39;unsigned long long&#39; for this targ...
Definition: TargetInfo.h:393
Kind getKind() const
Definition: ObjCRuntime.h:77
IntType getIntMaxType() const
Definition: TargetInfo.h:273
std::string getClangFullRepositoryVersion()
Retrieves the full repository version that is an amalgamation of the information in getClangRepositor...
Definition: Version.cpp:90
const llvm::DataLayout & getDataLayout() const
Definition: TargetInfo.h:953
virtual unsigned getFloatEvalMethod() const
Return the value for the C99 FLT_EVAL_METHOD macro.
Definition: TargetInfo.h:592
IntType getUInt64Type() const
Definition: TargetInfo.h:292
const VersionTuple & getVersion() const
Definition: ObjCRuntime.h:78
const char * getOriginalSourceFile() const
getOriginalSourceFile - Return the full path to the original header file name that was used to genera...
Definition: PTHManager.h:119
unsigned getLongDoubleWidth() const
getLongDoubleWidth/Align/Format - Return the size/align/format of &#39;long double&#39;.
Definition: TargetInfo.h:573
std::vector< std::string > MacroIncludes
IntType
===-— Target Data Type Query Methods ----------------------------—===//
Definition: TargetInfo.h:157
Dataflow Directional Tag Classes.
static const char * getTypeFormatModifier(IntType T)
Return the printf format modifier for the specified integer type enum.
Definition: TargetInfo.cpp:195
bool UsePredefines
Initialize the preprocessor with the compiler and target specific predefines.
frontend::ActionKind ProgramAction
The frontend action to perform.
FrontendOptions - Options for controlling the behavior of the frontend.
#define DEFINE_LOCK_FREE_MACRO(TYPE, Type)
bool useSignedCharForObjCBool() const
Check if the Objective-C built-in boolean type should be signed char.
Definition: TargetInfo.h:651
virtual void getTargetDefines(const LangOptions &Opts, MacroBuilder &Builder) const =0
===-— Other target property query methods --------------------——===//
ObjCXXARCStandardLibraryKind ObjCXXARCStandardLibrary
The Objective-C++ ARC standard library that we should support, by providing appropriate definitions t...
std::string getClangFullCPPVersion()
Retrieves a string representing the complete clang version suitable for use in the CPP VERSION macro...
Definition: Version.cpp:139
virtual bool hasInt128Type() const
Determine whether the __int128 type is supported on this target.
Definition: TargetInfo.h:510
Provides definitions for the atomic synchronization scopes.
DiagnosticsEngine & getDiagnostics() const
Definition: Preprocessor.h:824
const llvm::fltSemantics & getFloatFormat() const
Definition: TargetInfo.h:564
void InitializePreprocessor(Preprocessor &PP, const PreprocessorOptions &PPOpts, const PCHContainerReader &PCHContainerRdr, const FrontendOptions &FEOpts)
InitializePreprocessor - Initialize the preprocessor getting it and the environment ready to process ...
IntType getWCharType() const
Definition: TargetInfo.h:287
Run one or more source code analyses.
uint64_t getPointerAlign(unsigned AddrSpace) const
Definition: TargetInfo.h:351
std::pair< unsigned, bool > PrecompiledPreambleBytes
If non-zero, the implicit PCH include is actually a precompiled preamble that covers this number of b...
Defines the clang::TargetInfo interface.
IntType getIntPtrType() const
Definition: TargetInfo.h:283
__DEVICE__ int min(int __a, int __b)
void defineMacro(const Twine &Name, const Twine &Value="1")
Append a #define line for macro of the form "\#define Name Value\n".
Definition: MacroBuilder.h:30
void setSkipMainFilePreamble(unsigned Bytes, bool StartOfLine)
Instruct the preprocessor to skip part of the main source file.
PTHManager * getPTHManager()
Definition: Preprocessor.h:843
static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty, const TargetInfo &TI, MacroBuilder &Builder)
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Definition: Preprocessor.h:127