clang  10.0.0svn
InitPreprocessor.cpp
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1 //===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the clang::InitializePreprocessor function.
10 //
11 //===----------------------------------------------------------------------===//
12 
16 #include "clang/Basic/SyncScope.h"
17 #include "clang/Basic/TargetInfo.h"
18 #include "clang/Basic/Version.h"
21 #include "clang/Frontend/Utils.h"
22 #include "clang/Lex/HeaderSearch.h"
23 #include "clang/Lex/Preprocessor.h"
26 #include "llvm/ADT/APFloat.h"
27 #include "llvm/IR/DataLayout.h"
28 using namespace clang;
29 
30 static bool MacroBodyEndsInBackslash(StringRef MacroBody) {
31  while (!MacroBody.empty() && isWhitespace(MacroBody.back()))
32  MacroBody = MacroBody.drop_back();
33  return !MacroBody.empty() && MacroBody.back() == '\\';
34 }
35 
36 // Append a #define line to Buf for Macro. Macro should be of the form XXX,
37 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
38 // "#define XXX Y z W". To get a #define with no value, use "XXX=".
39 static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro,
40  DiagnosticsEngine &Diags) {
41  std::pair<StringRef, StringRef> MacroPair = Macro.split('=');
42  StringRef MacroName = MacroPair.first;
43  StringRef MacroBody = MacroPair.second;
44  if (MacroName.size() != Macro.size()) {
45  // Per GCC -D semantics, the macro ends at \n if it exists.
46  StringRef::size_type End = MacroBody.find_first_of("\n\r");
47  if (End != StringRef::npos)
48  Diags.Report(diag::warn_fe_macro_contains_embedded_newline)
49  << MacroName;
50  MacroBody = MacroBody.substr(0, End);
51  // We handle macro bodies which end in a backslash by appending an extra
52  // backslash+newline. This makes sure we don't accidentally treat the
53  // backslash as a line continuation marker.
54  if (MacroBodyEndsInBackslash(MacroBody))
55  Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n");
56  else
57  Builder.defineMacro(MacroName, MacroBody);
58  } else {
59  // Push "macroname 1".
60  Builder.defineMacro(Macro);
61  }
62 }
63 
64 /// AddImplicitInclude - Add an implicit \#include of the specified file to the
65 /// predefines buffer.
66 /// As these includes are generated by -include arguments the header search
67 /// logic is going to search relatively to the current working directory.
68 static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) {
69  Builder.append(Twine("#include \"") + File + "\"");
70 }
71 
72 static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) {
73  Builder.append(Twine("#__include_macros \"") + File + "\"");
74  // Marker token to stop the __include_macros fetch loop.
75  Builder.append("##"); // ##?
76 }
77 
78 /// Add an implicit \#include using the original file used to generate
79 /// a PCH file.
81  const PCHContainerReader &PCHContainerRdr,
82  StringRef ImplicitIncludePCH) {
83  std::string OriginalFile =
84  ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(),
85  PCHContainerRdr, PP.getDiagnostics());
86  if (OriginalFile.empty())
87  return;
88 
89  AddImplicitInclude(Builder, OriginalFile);
90 }
91 
92 /// PickFP - This is used to pick a value based on the FP semantics of the
93 /// specified FP model.
94 template <typename T>
95 static T PickFP(const llvm::fltSemantics *Sem, T IEEEHalfVal, T IEEESingleVal,
96  T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal,
97  T IEEEQuadVal) {
98  if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEhalf())
99  return IEEEHalfVal;
100  if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle())
101  return IEEESingleVal;
102  if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble())
103  return IEEEDoubleVal;
104  if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended())
105  return X87DoubleExtendedVal;
106  if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble())
107  return PPCDoubleDoubleVal;
108  assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad());
109  return IEEEQuadVal;
110 }
111 
112 static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix,
113  const llvm::fltSemantics *Sem, StringRef Ext) {
114  const char *DenormMin, *Epsilon, *Max, *Min;
115  DenormMin = PickFP(Sem, "5.9604644775390625e-8", "1.40129846e-45",
116  "4.9406564584124654e-324", "3.64519953188247460253e-4951",
117  "4.94065645841246544176568792868221e-324",
118  "6.47517511943802511092443895822764655e-4966");
119  int Digits = PickFP(Sem, 3, 6, 15, 18, 31, 33);
120  int DecimalDigits = PickFP(Sem, 5, 9, 17, 21, 33, 36);
121  Epsilon = PickFP(Sem, "9.765625e-4", "1.19209290e-7",
122  "2.2204460492503131e-16", "1.08420217248550443401e-19",
123  "4.94065645841246544176568792868221e-324",
124  "1.92592994438723585305597794258492732e-34");
125  int MantissaDigits = PickFP(Sem, 11, 24, 53, 64, 106, 113);
126  int Min10Exp = PickFP(Sem, -4, -37, -307, -4931, -291, -4931);
127  int Max10Exp = PickFP(Sem, 4, 38, 308, 4932, 308, 4932);
128  int MinExp = PickFP(Sem, -13, -125, -1021, -16381, -968, -16381);
129  int MaxExp = PickFP(Sem, 16, 128, 1024, 16384, 1024, 16384);
130  Min = PickFP(Sem, "6.103515625e-5", "1.17549435e-38", "2.2250738585072014e-308",
131  "3.36210314311209350626e-4932",
132  "2.00416836000897277799610805135016e-292",
133  "3.36210314311209350626267781732175260e-4932");
134  Max = PickFP(Sem, "6.5504e+4", "3.40282347e+38", "1.7976931348623157e+308",
135  "1.18973149535723176502e+4932",
136  "1.79769313486231580793728971405301e+308",
137  "1.18973149535723176508575932662800702e+4932");
138 
139  SmallString<32> DefPrefix;
140  DefPrefix = "__";
141  DefPrefix += Prefix;
142  DefPrefix += "_";
143 
144  Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext);
145  Builder.defineMacro(DefPrefix + "HAS_DENORM__");
146  Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits));
147  Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits));
148  Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext);
149  Builder.defineMacro(DefPrefix + "HAS_INFINITY__");
150  Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__");
151  Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits));
152 
153  Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp));
154  Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp));
155  Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext);
156 
157  Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")");
158  Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")");
159  Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext);
160 }
161 
162 
163 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro
164 /// named MacroName with the max value for a type with width 'TypeWidth' a
165 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL).
166 static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth,
167  StringRef ValSuffix, bool isSigned,
168  MacroBuilder &Builder) {
169  llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth)
170  : llvm::APInt::getMaxValue(TypeWidth);
171  Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix);
172 }
173 
174 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine
175 /// the width, suffix, and signedness of the given type
176 static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty,
177  const TargetInfo &TI, MacroBuilder &Builder) {
178  DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty),
179  TI.isTypeSigned(Ty), Builder);
180 }
181 
182 static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty,
183  const TargetInfo &TI, MacroBuilder &Builder) {
184  bool IsSigned = TI.isTypeSigned(Ty);
185  StringRef FmtModifier = TI.getTypeFormatModifier(Ty);
186  for (const char *Fmt = IsSigned ? "di" : "ouxX"; *Fmt; ++Fmt) {
187  Builder.defineMacro(Prefix + "_FMT" + Twine(*Fmt) + "__",
188  Twine("\"") + FmtModifier + Twine(*Fmt) + "\"");
189  }
190 }
191 
192 static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty,
193  MacroBuilder &Builder) {
194  Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty));
195 }
196 
197 static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty,
198  const TargetInfo &TI, MacroBuilder &Builder) {
199  Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty)));
200 }
201 
202 static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth,
203  const TargetInfo &TI, MacroBuilder &Builder) {
204  Builder.defineMacro(MacroName,
205  Twine(BitWidth / TI.getCharWidth()));
206 }
207 
209  const TargetInfo &TI,
210  MacroBuilder &Builder) {
211  int TypeWidth = TI.getTypeWidth(Ty);
212  bool IsSigned = TI.isTypeSigned(Ty);
213 
214  // Use the target specified int64 type, when appropriate, so that [u]int64_t
215  // ends up being defined in terms of the correct type.
216  if (TypeWidth == 64)
217  Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type();
218 
219  const char *Prefix = IsSigned ? "__INT" : "__UINT";
220 
221  DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
222  DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder);
223 
224  StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty));
225  Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix);
226 }
227 
229  const TargetInfo &TI,
230  MacroBuilder &Builder) {
231  int TypeWidth = TI.getTypeWidth(Ty);
232  bool IsSigned = TI.isTypeSigned(Ty);
233 
234  // Use the target specified int64 type, when appropriate, so that [u]int64_t
235  // ends up being defined in terms of the correct type.
236  if (TypeWidth == 64)
237  Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type();
238 
239  const char *Prefix = IsSigned ? "__INT" : "__UINT";
240  DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
241 }
242 
243 static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned,
244  const TargetInfo &TI,
245  MacroBuilder &Builder) {
246  TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned);
247  if (Ty == TargetInfo::NoInt)
248  return;
249 
250  const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST";
251  DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
252  DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
253  DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder);
254 }
255 
256 static void DefineFastIntType(unsigned TypeWidth, bool IsSigned,
257  const TargetInfo &TI, MacroBuilder &Builder) {
258  // stdint.h currently defines the fast int types as equivalent to the least
259  // types.
260  TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned);
261  if (Ty == TargetInfo::NoInt)
262  return;
263 
264  const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST";
265  DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
266  DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
267 
268  DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder);
269 }
270 
271 
272 /// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with
273 /// the specified properties.
274 static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign,
275  unsigned InlineWidth) {
276  // Fully-aligned, power-of-2 sizes no larger than the inline
277  // width will be inlined as lock-free operations.
278  if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 &&
279  TypeWidth <= InlineWidth)
280  return "2"; // "always lock free"
281  // We cannot be certain what operations the lib calls might be
282  // able to implement as lock-free on future processors.
283  return "1"; // "sometimes lock free"
284 }
285 
286 /// Add definitions required for a smooth interaction between
287 /// Objective-C++ automated reference counting and libstdc++ (4.2).
288 static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts,
289  MacroBuilder &Builder) {
290  Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR");
291 
292  std::string Result;
293  {
294  // Provide specializations for the __is_scalar type trait so that
295  // lifetime-qualified objects are not considered "scalar" types, which
296  // libstdc++ uses as an indicator of the presence of trivial copy, assign,
297  // default-construct, and destruct semantics (none of which hold for
298  // lifetime-qualified objects in ARC).
299  llvm::raw_string_ostream Out(Result);
300 
301  Out << "namespace std {\n"
302  << "\n"
303  << "struct __true_type;\n"
304  << "struct __false_type;\n"
305  << "\n";
306 
307  Out << "template<typename _Tp> struct __is_scalar;\n"
308  << "\n";
309 
310  if (LangOpts.ObjCAutoRefCount) {
311  Out << "template<typename _Tp>\n"
312  << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n"
313  << " enum { __value = 0 };\n"
314  << " typedef __false_type __type;\n"
315  << "};\n"
316  << "\n";
317  }
318 
319  if (LangOpts.ObjCWeak) {
320  Out << "template<typename _Tp>\n"
321  << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n"
322  << " enum { __value = 0 };\n"
323  << " typedef __false_type __type;\n"
324  << "};\n"
325  << "\n";
326  }
327 
328  if (LangOpts.ObjCAutoRefCount) {
329  Out << "template<typename _Tp>\n"
330  << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))"
331  << " _Tp> {\n"
332  << " enum { __value = 0 };\n"
333  << " typedef __false_type __type;\n"
334  << "};\n"
335  << "\n";
336  }
337 
338  Out << "}\n";
339  }
340  Builder.append(Result);
341 }
342 
344  const LangOptions &LangOpts,
345  const FrontendOptions &FEOpts,
346  MacroBuilder &Builder) {
347  if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP)
348  Builder.defineMacro("__STDC__");
349  if (LangOpts.Freestanding)
350  Builder.defineMacro("__STDC_HOSTED__", "0");
351  else
352  Builder.defineMacro("__STDC_HOSTED__");
353 
354  if (!LangOpts.CPlusPlus) {
355  if (LangOpts.C17)
356  Builder.defineMacro("__STDC_VERSION__", "201710L");
357  else if (LangOpts.C11)
358  Builder.defineMacro("__STDC_VERSION__", "201112L");
359  else if (LangOpts.C99)
360  Builder.defineMacro("__STDC_VERSION__", "199901L");
361  else if (!LangOpts.GNUMode && LangOpts.Digraphs)
362  Builder.defineMacro("__STDC_VERSION__", "199409L");
363  } else {
364  // FIXME: Use correct value for C++20.
365  if (LangOpts.CPlusPlus2a)
366  Builder.defineMacro("__cplusplus", "201707L");
367  // C++17 [cpp.predefined]p1:
368  // The name __cplusplus is defined to the value 201703L when compiling a
369  // C++ translation unit.
370  else if (LangOpts.CPlusPlus17)
371  Builder.defineMacro("__cplusplus", "201703L");
372  // C++1y [cpp.predefined]p1:
373  // The name __cplusplus is defined to the value 201402L when compiling a
374  // C++ translation unit.
375  else if (LangOpts.CPlusPlus14)
376  Builder.defineMacro("__cplusplus", "201402L");
377  // C++11 [cpp.predefined]p1:
378  // The name __cplusplus is defined to the value 201103L when compiling a
379  // C++ translation unit.
380  else if (LangOpts.CPlusPlus11)
381  Builder.defineMacro("__cplusplus", "201103L");
382  // C++03 [cpp.predefined]p1:
383  // The name __cplusplus is defined to the value 199711L when compiling a
384  // C++ translation unit.
385  else
386  Builder.defineMacro("__cplusplus", "199711L");
387 
388  // C++1z [cpp.predefined]p1:
389  // An integer literal of type std::size_t whose value is the alignment
390  // guaranteed by a call to operator new(std::size_t)
391  //
392  // We provide this in all language modes, since it seems generally useful.
393  Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__",
394  Twine(TI.getNewAlign() / TI.getCharWidth()) +
396  }
397 
398  // In C11 these are environment macros. In C++11 they are only defined
399  // as part of <cuchar>. To prevent breakage when mixing C and C++
400  // code, define these macros unconditionally. We can define them
401  // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit
402  // and 32-bit character literals.
403  Builder.defineMacro("__STDC_UTF_16__", "1");
404  Builder.defineMacro("__STDC_UTF_32__", "1");
405 
406  if (LangOpts.ObjC)
407  Builder.defineMacro("__OBJC__");
408 
409  // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros.
410  if (LangOpts.OpenCL) {
411  if (LangOpts.CPlusPlus) {
412  if (LangOpts.OpenCLCPlusPlusVersion == 100)
413  Builder.defineMacro("__OPENCL_CPP_VERSION__", "100");
414  else
415  llvm_unreachable("Unsupported C++ version for OpenCL");
416  Builder.defineMacro("__CL_CPP_VERSION_1_0__", "100");
417  } else {
418  // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the
419  // language standard with which the program is compiled. __OPENCL_VERSION__
420  // is for the OpenCL version supported by the OpenCL device, which is not
421  // necessarily the language standard with which the program is compiled.
422  // A shared OpenCL header file requires a macro to indicate the language
423  // standard. As a workaround, __OPENCL_C_VERSION__ is defined for
424  // OpenCL v1.0 and v1.1.
425  switch (LangOpts.OpenCLVersion) {
426  case 100:
427  Builder.defineMacro("__OPENCL_C_VERSION__", "100");
428  break;
429  case 110:
430  Builder.defineMacro("__OPENCL_C_VERSION__", "110");
431  break;
432  case 120:
433  Builder.defineMacro("__OPENCL_C_VERSION__", "120");
434  break;
435  case 200:
436  Builder.defineMacro("__OPENCL_C_VERSION__", "200");
437  break;
438  default:
439  llvm_unreachable("Unsupported OpenCL version");
440  }
441  }
442  Builder.defineMacro("CL_VERSION_1_0", "100");
443  Builder.defineMacro("CL_VERSION_1_1", "110");
444  Builder.defineMacro("CL_VERSION_1_2", "120");
445  Builder.defineMacro("CL_VERSION_2_0", "200");
446 
447  if (TI.isLittleEndian())
448  Builder.defineMacro("__ENDIAN_LITTLE__");
449 
450  if (LangOpts.FastRelaxedMath)
451  Builder.defineMacro("__FAST_RELAXED_MATH__");
452  }
453  // Not "standard" per se, but available even with the -undef flag.
454  if (LangOpts.AsmPreprocessor)
455  Builder.defineMacro("__ASSEMBLER__");
456  if (LangOpts.CUDA && !LangOpts.HIP)
457  Builder.defineMacro("__CUDA__");
458  if (LangOpts.HIP) {
459  Builder.defineMacro("__HIP__");
460  Builder.defineMacro("__HIPCC__");
461  if (LangOpts.CUDAIsDevice)
462  Builder.defineMacro("__HIP_DEVICE_COMPILE__");
463  }
464 }
465 
466 /// Initialize the predefined C++ language feature test macros defined in
467 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations".
469  MacroBuilder &Builder) {
470  // C++98 features.
471  if (LangOpts.RTTI)
472  Builder.defineMacro("__cpp_rtti", "199711L");
473  if (LangOpts.CXXExceptions)
474  Builder.defineMacro("__cpp_exceptions", "199711L");
475 
476  // C++11 features.
477  if (LangOpts.CPlusPlus11) {
478  Builder.defineMacro("__cpp_unicode_characters", "200704L");
479  Builder.defineMacro("__cpp_raw_strings", "200710L");
480  Builder.defineMacro("__cpp_unicode_literals", "200710L");
481  Builder.defineMacro("__cpp_user_defined_literals", "200809L");
482  Builder.defineMacro("__cpp_lambdas", "200907L");
483  Builder.defineMacro("__cpp_constexpr",
484  LangOpts.CPlusPlus2a ? "201907L" :
485  LangOpts.CPlusPlus17 ? "201603L" :
486  LangOpts.CPlusPlus14 ? "201304L" : "200704");
487  Builder.defineMacro("__cpp_range_based_for",
488  LangOpts.CPlusPlus17 ? "201603L" : "200907");
489  Builder.defineMacro("__cpp_static_assert",
490  LangOpts.CPlusPlus17 ? "201411L" : "200410");
491  Builder.defineMacro("__cpp_decltype", "200707L");
492  Builder.defineMacro("__cpp_attributes", "200809L");
493  Builder.defineMacro("__cpp_rvalue_references", "200610L");
494  Builder.defineMacro("__cpp_variadic_templates", "200704L");
495  Builder.defineMacro("__cpp_initializer_lists", "200806L");
496  Builder.defineMacro("__cpp_delegating_constructors", "200604L");
497  Builder.defineMacro("__cpp_nsdmi", "200809L");
498  Builder.defineMacro("__cpp_inheriting_constructors", "201511L");
499  Builder.defineMacro("__cpp_ref_qualifiers", "200710L");
500  Builder.defineMacro("__cpp_alias_templates", "200704L");
501  }
502  if (LangOpts.ThreadsafeStatics)
503  Builder.defineMacro("__cpp_threadsafe_static_init", "200806L");
504 
505  // C++14 features.
506  if (LangOpts.CPlusPlus14) {
507  Builder.defineMacro("__cpp_binary_literals", "201304L");
508  Builder.defineMacro("__cpp_digit_separators", "201309L");
509  Builder.defineMacro("__cpp_init_captures", "201304L");
510  Builder.defineMacro("__cpp_generic_lambdas", "201304L");
511  Builder.defineMacro("__cpp_decltype_auto", "201304L");
512  Builder.defineMacro("__cpp_return_type_deduction", "201304L");
513  Builder.defineMacro("__cpp_aggregate_nsdmi", "201304L");
514  Builder.defineMacro("__cpp_variable_templates", "201304L");
515  }
516  if (LangOpts.SizedDeallocation)
517  Builder.defineMacro("__cpp_sized_deallocation", "201309L");
518 
519  // C++17 features.
520  if (LangOpts.CPlusPlus17) {
521  Builder.defineMacro("__cpp_hex_float", "201603L");
522  Builder.defineMacro("__cpp_inline_variables", "201606L");
523  Builder.defineMacro("__cpp_noexcept_function_type", "201510L");
524  Builder.defineMacro("__cpp_capture_star_this", "201603L");
525  Builder.defineMacro("__cpp_if_constexpr", "201606L");
526  Builder.defineMacro("__cpp_deduction_guides", "201703L");
527  Builder.defineMacro("__cpp_template_auto", "201606L"); // (old name)
528  Builder.defineMacro("__cpp_namespace_attributes", "201411L");
529  Builder.defineMacro("__cpp_enumerator_attributes", "201411L");
530  Builder.defineMacro("__cpp_nested_namespace_definitions", "201411L");
531  Builder.defineMacro("__cpp_variadic_using", "201611L");
532  Builder.defineMacro("__cpp_aggregate_bases", "201603L");
533  Builder.defineMacro("__cpp_structured_bindings", "201606L");
534  Builder.defineMacro("__cpp_nontype_template_args", "201411L");
535  Builder.defineMacro("__cpp_fold_expressions", "201603L");
536  Builder.defineMacro("__cpp_guaranteed_copy_elision", "201606L");
537  Builder.defineMacro("__cpp_nontype_template_parameter_auto", "201606L");
538  }
539  if (LangOpts.AlignedAllocation && !LangOpts.AlignedAllocationUnavailable)
540  Builder.defineMacro("__cpp_aligned_new", "201606L");
541  if (LangOpts.RelaxedTemplateTemplateArgs)
542  Builder.defineMacro("__cpp_template_template_args", "201611L");
543 
544  // C++20 features.
545  if (LangOpts.CPlusPlus2a) {
546  Builder.defineMacro("__cpp_conditional_explicit", "201806L");
547  Builder.defineMacro("__cpp_constexpr_dynamic_alloc", "201907L");
548  Builder.defineMacro("__cpp_constinit", "201907L");
549  }
550  if (LangOpts.Char8)
551  Builder.defineMacro("__cpp_char8_t", "201811L");
552  Builder.defineMacro("__cpp_impl_destroying_delete", "201806L");
553 
554  // TS features.
555  if (LangOpts.ConceptsTS)
556  Builder.defineMacro("__cpp_experimental_concepts", "1L");
557  if (LangOpts.Coroutines)
558  Builder.defineMacro("__cpp_coroutines", "201703L");
559 }
560 
562  const LangOptions &LangOpts,
563  const FrontendOptions &FEOpts,
564  const PreprocessorOptions &PPOpts,
565  MacroBuilder &Builder) {
566  // Compiler version introspection macros.
567  Builder.defineMacro("__llvm__"); // LLVM Backend
568  Builder.defineMacro("__clang__"); // Clang Frontend
569 #define TOSTR2(X) #X
570 #define TOSTR(X) TOSTR2(X)
571  Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR));
572  Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR));
573  Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL));
574 #undef TOSTR
575 #undef TOSTR2
576  Builder.defineMacro("__clang_version__",
577  "\"" CLANG_VERSION_STRING " "
578  + getClangFullRepositoryVersion() + "\"");
579 
580  if (LangOpts.GNUCVersion != 0) {
581  // Major, minor, patch, are given two decimal places each, so 4.2.1 becomes
582  // 40201.
583  unsigned GNUCMajor = LangOpts.GNUCVersion / 100 / 100;
584  unsigned GNUCMinor = LangOpts.GNUCVersion / 100 % 100;
585  unsigned GNUCPatch = LangOpts.GNUCVersion % 100;
586  Builder.defineMacro("__GNUC__", Twine(GNUCMajor));
587  Builder.defineMacro("__GNUC_MINOR__", Twine(GNUCMinor));
588  Builder.defineMacro("__GNUC_PATCHLEVEL__", Twine(GNUCPatch));
589  Builder.defineMacro("__GXX_ABI_VERSION", "1002");
590 
591  if (LangOpts.CPlusPlus) {
592  Builder.defineMacro("__GNUG__", Twine(GNUCMajor));
593  Builder.defineMacro("__GXX_WEAK__");
594  }
595  }
596 
597  // Define macros for the C11 / C++11 memory orderings
598  Builder.defineMacro("__ATOMIC_RELAXED", "0");
599  Builder.defineMacro("__ATOMIC_CONSUME", "1");
600  Builder.defineMacro("__ATOMIC_ACQUIRE", "2");
601  Builder.defineMacro("__ATOMIC_RELEASE", "3");
602  Builder.defineMacro("__ATOMIC_ACQ_REL", "4");
603  Builder.defineMacro("__ATOMIC_SEQ_CST", "5");
604 
605  // Define macros for the OpenCL memory scope.
606  // The values should match AtomicScopeOpenCLModel::ID enum.
607  static_assert(
608  static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 &&
609  static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 &&
610  static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 &&
611  static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4,
612  "Invalid OpenCL memory scope enum definition");
613  Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0");
614  Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1");
615  Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2");
616  Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3");
617  Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4");
618 
619  // Support for #pragma redefine_extname (Sun compatibility)
620  Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1");
621 
622  // Previously this macro was set to a string aiming to achieve compatibility
623  // with GCC 4.2.1. Now, just return the full Clang version
624  Builder.defineMacro("__VERSION__", "\"" +
625  Twine(getClangFullCPPVersion()) + "\"");
626 
627  // Initialize language-specific preprocessor defines.
628 
629  // Standard conforming mode?
630  if (!LangOpts.GNUMode && !LangOpts.MSVCCompat)
631  Builder.defineMacro("__STRICT_ANSI__");
632 
633  if (LangOpts.GNUCVersion && LangOpts.CPlusPlus11)
634  Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");
635 
636  if (LangOpts.ObjC) {
637  if (LangOpts.ObjCRuntime.isNonFragile()) {
638  Builder.defineMacro("__OBJC2__");
639 
640  if (LangOpts.ObjCExceptions)
641  Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
642  }
643 
644  if (LangOpts.getGC() != LangOptions::NonGC)
645  Builder.defineMacro("__OBJC_GC__");
646 
647  if (LangOpts.ObjCRuntime.isNeXTFamily())
648  Builder.defineMacro("__NEXT_RUNTIME__");
649 
650  if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::GNUstep) {
651  auto version = LangOpts.ObjCRuntime.getVersion();
652  std::string versionString = "1";
653  // Don't rely on the tuple argument, because we can be asked to target
654  // later ABIs than we actually support, so clamp these values to those
655  // currently supported
656  if (version >= VersionTuple(2, 0))
657  Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__", "20");
658  else
659  Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__",
660  "1" + Twine(std::min(8U, version.getMinor().getValueOr(0))));
661  }
662 
663  if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) {
664  VersionTuple tuple = LangOpts.ObjCRuntime.getVersion();
665 
666  unsigned minor = 0;
667  if (tuple.getMinor().hasValue())
668  minor = tuple.getMinor().getValue();
669 
670  unsigned subminor = 0;
671  if (tuple.getSubminor().hasValue())
672  subminor = tuple.getSubminor().getValue();
673 
674  Builder.defineMacro("__OBJFW_RUNTIME_ABI__",
675  Twine(tuple.getMajor() * 10000 + minor * 100 +
676  subminor));
677  }
678 
679  Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))");
680  Builder.defineMacro("IBOutletCollection(ClassName)",
681  "__attribute__((iboutletcollection(ClassName)))");
682  Builder.defineMacro("IBAction", "void)__attribute__((ibaction)");
683  Builder.defineMacro("IBInspectable", "");
684  Builder.defineMacro("IB_DESIGNABLE", "");
685  }
686 
687  // Define a macro that describes the Objective-C boolean type even for C
688  // and C++ since BOOL can be used from non Objective-C code.
689  Builder.defineMacro("__OBJC_BOOL_IS_BOOL",
690  Twine(TI.useSignedCharForObjCBool() ? "0" : "1"));
691 
692  if (LangOpts.CPlusPlus)
693  InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder);
694 
695  // darwin_constant_cfstrings controls this. This is also dependent
696  // on other things like the runtime I believe. This is set even for C code.
697  if (!LangOpts.NoConstantCFStrings)
698  Builder.defineMacro("__CONSTANT_CFSTRINGS__");
699 
700  if (LangOpts.ObjC)
701  Builder.defineMacro("OBJC_NEW_PROPERTIES");
702 
703  if (LangOpts.PascalStrings)
704  Builder.defineMacro("__PASCAL_STRINGS__");
705 
706  if (LangOpts.Blocks) {
707  Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))");
708  Builder.defineMacro("__BLOCKS__");
709  }
710 
711  if (!LangOpts.MSVCCompat && LangOpts.Exceptions)
712  Builder.defineMacro("__EXCEPTIONS");
713  if (LangOpts.GNUCVersion && LangOpts.RTTI)
714  Builder.defineMacro("__GXX_RTTI");
715 
716  if (LangOpts.SjLjExceptions)
717  Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__");
718  else if (LangOpts.SEHExceptions)
719  Builder.defineMacro("__SEH__");
720  else if (LangOpts.DWARFExceptions &&
721  (TI.getTriple().isThumb() || TI.getTriple().isARM()))
722  Builder.defineMacro("__ARM_DWARF_EH__");
723 
724  if (LangOpts.Deprecated)
725  Builder.defineMacro("__DEPRECATED");
726 
727  if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus)
728  Builder.defineMacro("__private_extern__", "extern");
729 
730  if (LangOpts.MicrosoftExt) {
731  if (LangOpts.WChar) {
732  // wchar_t supported as a keyword.
733  Builder.defineMacro("_WCHAR_T_DEFINED");
734  Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED");
735  }
736  }
737 
738  if (LangOpts.Optimize)
739  Builder.defineMacro("__OPTIMIZE__");
740  if (LangOpts.OptimizeSize)
741  Builder.defineMacro("__OPTIMIZE_SIZE__");
742 
743  if (LangOpts.FastMath)
744  Builder.defineMacro("__FAST_MATH__");
745 
746  // Initialize target-specific preprocessor defines.
747 
748  // __BYTE_ORDER__ was added in GCC 4.6. It's analogous
749  // to the macro __BYTE_ORDER (no trailing underscores)
750  // from glibc's <endian.h> header.
751  // We don't support the PDP-11 as a target, but include
752  // the define so it can still be compared against.
753  Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234");
754  Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321");
755  Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412");
756  if (TI.isBigEndian()) {
757  Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__");
758  Builder.defineMacro("__BIG_ENDIAN__");
759  } else {
760  Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__");
761  Builder.defineMacro("__LITTLE_ENDIAN__");
762  }
763 
764  if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64
765  && TI.getIntWidth() == 32) {
766  Builder.defineMacro("_LP64");
767  Builder.defineMacro("__LP64__");
768  }
769 
770  if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32
771  && TI.getIntWidth() == 32) {
772  Builder.defineMacro("_ILP32");
773  Builder.defineMacro("__ILP32__");
774  }
775 
776  // Define type sizing macros based on the target properties.
777  assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far");
778  Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth()));
779 
780  DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder);
781  DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder);
782  DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder);
783  DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder);
784  DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder);
785  DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder);
786  DefineTypeSize("__WINT_MAX__", TI.getWIntType(), TI, Builder);
787  DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder);
788  DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder);
789 
790  DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder);
791  DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder);
792  DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder);
793  DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder);
794 
795  DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder);
796  DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder);
797  DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder);
798  DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder);
799  DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder);
800  DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder);
801  DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder);
802  DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder);
803  DefineTypeSizeof("__SIZEOF_PTRDIFF_T__",
804  TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder);
805  DefineTypeSizeof("__SIZEOF_SIZE_T__",
806  TI.getTypeWidth(TI.getSizeType()), TI, Builder);
807  DefineTypeSizeof("__SIZEOF_WCHAR_T__",
808  TI.getTypeWidth(TI.getWCharType()), TI, Builder);
809  DefineTypeSizeof("__SIZEOF_WINT_T__",
810  TI.getTypeWidth(TI.getWIntType()), TI, Builder);
811  if (TI.hasInt128Type())
812  DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder);
813 
814  DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder);
815  DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder);
816  Builder.defineMacro("__INTMAX_C_SUFFIX__",
818  DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder);
819  DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder);
820  Builder.defineMacro("__UINTMAX_C_SUFFIX__",
822  DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder);
823  DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder);
824  DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder);
825  DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder);
826  DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder);
827  DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder);
828  DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder);
829  DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder);
830  DefineFmt("__SIZE", TI.getSizeType(), TI, Builder);
831  DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder);
832  DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder);
833  DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder);
834  DefineType("__WINT_TYPE__", TI.getWIntType(), Builder);
835  DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder);
836  DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder);
837  DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder);
838  DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder);
839  DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder);
840 
841  DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder);
842  DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder);
843  DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder);
844  DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder);
845 
846  if (TI.hasFloat16Type())
847  DefineFloatMacros(Builder, "FLT16", &TI.getHalfFormat(), "F16");
848  DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F");
849  DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), "");
850  DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L");
851 
852  // Define a __POINTER_WIDTH__ macro for stdint.h.
853  Builder.defineMacro("__POINTER_WIDTH__",
854  Twine((int)TI.getPointerWidth(0)));
855 
856  // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc.
857  Builder.defineMacro("__BIGGEST_ALIGNMENT__",
858  Twine(TI.getSuitableAlign() / TI.getCharWidth()) );
859 
860  if (!LangOpts.CharIsSigned)
861  Builder.defineMacro("__CHAR_UNSIGNED__");
862 
864  Builder.defineMacro("__WCHAR_UNSIGNED__");
865 
867  Builder.defineMacro("__WINT_UNSIGNED__");
868 
869  // Define exact-width integer types for stdint.h
871 
872  if (TI.getShortWidth() > TI.getCharWidth())
874 
875  if (TI.getIntWidth() > TI.getShortWidth())
877 
878  if (TI.getLongWidth() > TI.getIntWidth())
880 
881  if (TI.getLongLongWidth() > TI.getLongWidth())
883 
887 
888  if (TI.getShortWidth() > TI.getCharWidth()) {
892  }
893 
894  if (TI.getIntWidth() > TI.getShortWidth()) {
898  }
899 
900  if (TI.getLongWidth() > TI.getIntWidth()) {
904  }
905 
906  if (TI.getLongLongWidth() > TI.getLongWidth()) {
910  }
911 
912  DefineLeastWidthIntType(8, true, TI, Builder);
913  DefineLeastWidthIntType(8, false, TI, Builder);
914  DefineLeastWidthIntType(16, true, TI, Builder);
915  DefineLeastWidthIntType(16, false, TI, Builder);
916  DefineLeastWidthIntType(32, true, TI, Builder);
917  DefineLeastWidthIntType(32, false, TI, Builder);
918  DefineLeastWidthIntType(64, true, TI, Builder);
919  DefineLeastWidthIntType(64, false, TI, Builder);
920 
921  DefineFastIntType(8, true, TI, Builder);
922  DefineFastIntType(8, false, TI, Builder);
923  DefineFastIntType(16, true, TI, Builder);
924  DefineFastIntType(16, false, TI, Builder);
925  DefineFastIntType(32, true, TI, Builder);
926  DefineFastIntType(32, false, TI, Builder);
927  DefineFastIntType(64, true, TI, Builder);
928  DefineFastIntType(64, false, TI, Builder);
929 
930  char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0};
931  Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix);
932 
933  if (LangOpts.FastMath || LangOpts.FiniteMathOnly)
934  Builder.defineMacro("__FINITE_MATH_ONLY__", "1");
935  else
936  Builder.defineMacro("__FINITE_MATH_ONLY__", "0");
937 
938  if (LangOpts.GNUCVersion) {
939  if (LangOpts.GNUInline || LangOpts.CPlusPlus)
940  Builder.defineMacro("__GNUC_GNU_INLINE__");
941  else
942  Builder.defineMacro("__GNUC_STDC_INLINE__");
943 
944  // The value written by __atomic_test_and_set.
945  // FIXME: This is target-dependent.
946  Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1");
947  }
948 
949  auto addLockFreeMacros = [&](const llvm::Twine &Prefix) {
950  // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE.
951  unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth();
952 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \
953  Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \
954  getLockFreeValue(TI.get##Type##Width(), \
955  TI.get##Type##Align(), \
956  InlineWidthBits));
958  DEFINE_LOCK_FREE_MACRO(CHAR, Char);
959  if (LangOpts.Char8)
960  DEFINE_LOCK_FREE_MACRO(CHAR8_T, Char); // Treat char8_t like char.
961  DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16);
962  DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32);
963  DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar);
964  DEFINE_LOCK_FREE_MACRO(SHORT, Short);
965  DEFINE_LOCK_FREE_MACRO(INT, Int);
966  DEFINE_LOCK_FREE_MACRO(LONG, Long);
967  DEFINE_LOCK_FREE_MACRO(LLONG, LongLong);
968  Builder.defineMacro(Prefix + "POINTER_LOCK_FREE",
970  TI.getPointerAlign(0),
971  InlineWidthBits));
972 #undef DEFINE_LOCK_FREE_MACRO
973  };
974  addLockFreeMacros("__CLANG_ATOMIC_");
975  if (LangOpts.GNUCVersion)
976  addLockFreeMacros("__GCC_ATOMIC_");
977 
978  if (LangOpts.NoInlineDefine)
979  Builder.defineMacro("__NO_INLINE__");
980 
981  if (unsigned PICLevel = LangOpts.PICLevel) {
982  Builder.defineMacro("__PIC__", Twine(PICLevel));
983  Builder.defineMacro("__pic__", Twine(PICLevel));
984  if (LangOpts.PIE) {
985  Builder.defineMacro("__PIE__", Twine(PICLevel));
986  Builder.defineMacro("__pie__", Twine(PICLevel));
987  }
988  }
989 
990  // Macros to control C99 numerics and <float.h>
991  Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod()));
992  Builder.defineMacro("__FLT_RADIX__", "2");
993  Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__");
994 
995  if (LangOpts.getStackProtector() == LangOptions::SSPOn)
996  Builder.defineMacro("__SSP__");
997  else if (LangOpts.getStackProtector() == LangOptions::SSPStrong)
998  Builder.defineMacro("__SSP_STRONG__", "2");
999  else if (LangOpts.getStackProtector() == LangOptions::SSPReq)
1000  Builder.defineMacro("__SSP_ALL__", "3");
1001 
1002  if (PPOpts.SetUpStaticAnalyzer)
1003  Builder.defineMacro("__clang_analyzer__");
1004 
1005  if (LangOpts.FastRelaxedMath)
1006  Builder.defineMacro("__FAST_RELAXED_MATH__");
1007 
1008  if (FEOpts.ProgramAction == frontend::RewriteObjC ||
1009  LangOpts.getGC() != LangOptions::NonGC) {
1010  Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
1011  Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))");
1012  Builder.defineMacro("__autoreleasing", "");
1013  Builder.defineMacro("__unsafe_unretained", "");
1014  } else if (LangOpts.ObjC) {
1015  Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))");
1016  Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))");
1017  Builder.defineMacro("__autoreleasing",
1018  "__attribute__((objc_ownership(autoreleasing)))");
1019  Builder.defineMacro("__unsafe_unretained",
1020  "__attribute__((objc_ownership(none)))");
1021  }
1022 
1023  // On Darwin, there are __double_underscored variants of the type
1024  // nullability qualifiers.
1025  if (TI.getTriple().isOSDarwin()) {
1026  Builder.defineMacro("__nonnull", "_Nonnull");
1027  Builder.defineMacro("__null_unspecified", "_Null_unspecified");
1028  Builder.defineMacro("__nullable", "_Nullable");
1029  }
1030 
1031  // Add a macro to differentiate between regular iOS/tvOS/watchOS targets and
1032  // the corresponding simulator targets.
1033  if (TI.getTriple().isOSDarwin() && TI.getTriple().isSimulatorEnvironment())
1034  Builder.defineMacro("__APPLE_EMBEDDED_SIMULATOR__", "1");
1035 
1036  // OpenMP definition
1037  // OpenMP 2.2:
1038  // In implementations that support a preprocessor, the _OPENMP
1039  // macro name is defined to have the decimal value yyyymm where
1040  // yyyy and mm are the year and the month designations of the
1041  // version of the OpenMP API that the implementation support.
1042  if (!LangOpts.OpenMPSimd) {
1043  switch (LangOpts.OpenMP) {
1044  case 0:
1045  break;
1046  case 31:
1047  Builder.defineMacro("_OPENMP", "201107");
1048  break;
1049  case 40:
1050  Builder.defineMacro("_OPENMP", "201307");
1051  break;
1052  case 50:
1053  Builder.defineMacro("_OPENMP", "201811");
1054  break;
1055  default:
1056  // Default version is OpenMP 4.5
1057  Builder.defineMacro("_OPENMP", "201511");
1058  break;
1059  }
1060  }
1061 
1062  // CUDA device path compilaton
1063  if (LangOpts.CUDAIsDevice && !LangOpts.HIP) {
1064  // The CUDA_ARCH value is set for the GPU target specified in the NVPTX
1065  // backend's target defines.
1066  Builder.defineMacro("__CUDA_ARCH__");
1067  }
1068 
1069  // We need to communicate this to our CUDA header wrapper, which in turn
1070  // informs the proper CUDA headers of this choice.
1071  if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) {
1072  Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__");
1073  }
1074 
1075  // Define a macro indicating that the source file is being compiled with a
1076  // SYCL device compiler which doesn't produce host binary.
1077  if (LangOpts.SYCLIsDevice) {
1078  Builder.defineMacro("__SYCL_DEVICE_ONLY__", "1");
1079  }
1080 
1081  // OpenCL definitions.
1082  if (LangOpts.OpenCL) {
1083 #define OPENCLEXT(Ext) \
1084  if (TI.getSupportedOpenCLOpts().isSupported(#Ext, LangOpts)) \
1085  Builder.defineMacro(#Ext);
1086 #include "clang/Basic/OpenCLExtensions.def"
1087 
1088  if (TI.getTriple().isSPIR())
1089  Builder.defineMacro("__IMAGE_SUPPORT__");
1090  }
1091 
1092  if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) {
1093  // For each extended integer type, g++ defines a macro mapping the
1094  // index of the type (0 in this case) in some list of extended types
1095  // to the type.
1096  Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128");
1097  Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128");
1098  }
1099 
1100  // Get other target #defines.
1101  TI.getTargetDefines(LangOpts, Builder);
1102 }
1103 
1104 /// InitializePreprocessor - Initialize the preprocessor getting it and the
1105 /// environment ready to process a single file. This returns true on error.
1106 ///
1108  Preprocessor &PP, const PreprocessorOptions &InitOpts,
1109  const PCHContainerReader &PCHContainerRdr,
1110  const FrontendOptions &FEOpts) {
1111  const LangOptions &LangOpts = PP.getLangOpts();
1112  std::string PredefineBuffer;
1113  PredefineBuffer.reserve(4080);
1114  llvm::raw_string_ostream Predefines(PredefineBuffer);
1115  MacroBuilder Builder(Predefines);
1116 
1117  // Emit line markers for various builtin sections of the file. We don't do
1118  // this in asm preprocessor mode, because "# 4" is not a line marker directive
1119  // in this mode.
1120  if (!PP.getLangOpts().AsmPreprocessor)
1121  Builder.append("# 1 \"<built-in>\" 3");
1122 
1123  // Install things like __POWERPC__, __GNUC__, etc into the macro table.
1124  if (InitOpts.UsePredefines) {
1125  // FIXME: This will create multiple definitions for most of the predefined
1126  // macros. This is not the right way to handle this.
1127  if ((LangOpts.CUDA || LangOpts.OpenMPIsDevice) && PP.getAuxTargetInfo())
1128  InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts,
1129  PP.getPreprocessorOpts(), Builder);
1130 
1131  InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts,
1132  PP.getPreprocessorOpts(), Builder);
1133 
1134  // Install definitions to make Objective-C++ ARC work well with various
1135  // C++ Standard Library implementations.
1136  if (LangOpts.ObjC && LangOpts.CPlusPlus &&
1137  (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) {
1138  switch (InitOpts.ObjCXXARCStandardLibrary) {
1139  case ARCXX_nolib:
1140  case ARCXX_libcxx:
1141  break;
1142 
1143  case ARCXX_libstdcxx:
1144  AddObjCXXARCLibstdcxxDefines(LangOpts, Builder);
1145  break;
1146  }
1147  }
1148  }
1149 
1150  // Even with predefines off, some macros are still predefined.
1151  // These should all be defined in the preprocessor according to the
1152  // current language configuration.
1154  FEOpts, Builder);
1155 
1156  // Add on the predefines from the driver. Wrap in a #line directive to report
1157  // that they come from the command line.
1158  if (!PP.getLangOpts().AsmPreprocessor)
1159  Builder.append("# 1 \"<command line>\" 1");
1160 
1161  // Process #define's and #undef's in the order they are given.
1162  for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) {
1163  if (InitOpts.Macros[i].second) // isUndef
1164  Builder.undefineMacro(InitOpts.Macros[i].first);
1165  else
1166  DefineBuiltinMacro(Builder, InitOpts.Macros[i].first,
1167  PP.getDiagnostics());
1168  }
1169 
1170  // Exit the command line and go back to <built-in> (2 is LC_LEAVE).
1171  if (!PP.getLangOpts().AsmPreprocessor)
1172  Builder.append("# 1 \"<built-in>\" 2");
1173 
1174  // If -imacros are specified, include them now. These are processed before
1175  // any -include directives.
1176  for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
1177  AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]);
1178 
1179  // Process -include-pch/-include-pth directives.
1180  if (!InitOpts.ImplicitPCHInclude.empty())
1181  AddImplicitIncludePCH(Builder, PP, PCHContainerRdr,
1182  InitOpts.ImplicitPCHInclude);
1183 
1184  // Process -include directives.
1185  for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
1186  const std::string &Path = InitOpts.Includes[i];
1187  AddImplicitInclude(Builder, Path);
1188  }
1189 
1190  // Instruct the preprocessor to skip the preamble.
1192  InitOpts.PrecompiledPreambleBytes.second);
1193 
1194  // Copy PredefinedBuffer into the Preprocessor.
1195  PP.setPredefines(Predefines.str());
1196 }
unsigned getTypeWidth(IntType T) const
Return the width (in bits) of the specified integer type enum.
Definition: TargetInfo.cpp:219
IntType getInt64Type() const
Definition: TargetInfo.h:303
unsigned getFloatWidth() const
getFloatWidth/Align/Format - Return the size/align/format of &#39;float&#39;.
Definition: TargetInfo.h:579
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:400
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:537
bool isBigEndian() const
Definition: TargetInfo.h:1255
const llvm::Triple & getTriple() const
Returns the target triple of the primary target.
Definition: TargetInfo.h:991
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:250
FileManager & getFileManager() const
Definition: Preprocessor.h:907
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)
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:1673
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1290
PreprocessorOptions - This class is used for passing the various options used in preprocessor initial...
unsigned getCharWidth() const
Definition: TargetInfo.h:382
const llvm::fltSemantics & getHalfFormat() const
Definition: TargetInfo.h:576
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:360
#define TOSTR(X)
const char * getTypeConstantSuffix(IntType T) const
Return the constant suffix for the specified integer type enum.
Definition: TargetInfo.cpp:176
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:302
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:554
const TargetInfo & getTargetInfo() const
Definition: Preprocessor.h:905
void undefineMacro(const Twine &Name)
Append a #undef line for Name.
Definition: MacroBuilder.h:35
IntType getSizeType() const
Definition: TargetInfo.h:270
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:49
const LangOptions & getLangOpts() const
Definition: Preprocessor.h:904
static bool isTypeSigned(IntType T)
Returns true if the type is signed; false otherwise.
Definition: TargetInfo.cpp:308
bool isNonFragile() const
Does this runtime follow the set of implied behaviors for a "non-fragile" ABI?
Definition: ObjCRuntime.h:81
bool isNeXTFamily() const
Is this runtime basically of the NeXT family of runtimes?
Definition: ObjCRuntime.h:134
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:87
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:149
void append(const Twine &Str)
Directly append Str and a newline to the underlying buffer.
Definition: MacroBuilder.h:40
unsigned getShortWidth() const
Return the size of &#39;signed short&#39; and &#39;unsigned short&#39; for this target, in bits.
Definition: TargetInfo.h:387
static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, MacroBuilder &Builder)
const TargetInfo * getAuxTargetInfo() const
Definition: Preprocessor.h:906
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:1256
const llvm::fltSemantics & getDoubleFormat() const
Definition: TargetInfo.h:586
static void DefineExactWidthIntType(TargetInfo::IntType Ty, const TargetInfo &TI, MacroBuilder &Builder)
const llvm::fltSemantics & getLongDoubleFormat() const
Definition: TargetInfo.h:592
Exposes information about the current target.
Definition: TargetInfo.h:163
static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned, const TargetInfo &TI, MacroBuilder &Builder)
SourceLocation End
IntType getUIntPtrType() const
Definition: TargetInfo.h:296
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:395
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:301
clang::ObjCRuntime ObjCRuntime
Definition: LangOptions.h:223
&#39;gnustep&#39; is the modern non-fragile GNUstep runtime.
Definition: ObjCRuntime.h:55
IntType getUIntMaxType() const
Definition: TargetInfo.h:286
unsigned getDoubleWidth() const
getDoubleWidth/Align/Format - Return the size/align/format of &#39;double&#39;.
Definition: TargetInfo.h:584
static void InitializePredefinedMacros(const TargetInfo &TI, const LangOptions &LangOpts, const FrontendOptions &FEOpts, const PreprocessorOptions &PPOpts, MacroBuilder &Builder)
static const char * getTypeName(IntType T)
Return the user string for the specified integer type enum.
Definition: TargetInfo.cpp:158
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:289
IntType getSigAtomicType() const
Definition: TargetInfo.h:307
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:623
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:300
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:58
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:405
Kind getKind() const
Definition: ObjCRuntime.h:76
IntType getIntMaxType() const
Definition: TargetInfo.h:285
std::string getClangFullRepositoryVersion()
Retrieves the full repository version that is an amalgamation of the information in getClangRepositor...
Definition: Version.cpp:89
llvm::APInt APInt
Definition: Integral.h:27
const llvm::DataLayout & getDataLayout() const
Definition: TargetInfo.h:995
virtual unsigned getFloatEvalMethod() const
Return the value for the C99 FLT_EVAL_METHOD macro.
Definition: TargetInfo.h:611
IntType getUInt64Type() const
Definition: TargetInfo.h:304
const VersionTuple & getVersion() const
Definition: ObjCRuntime.h:77
unsigned getLongDoubleWidth() const
getLongDoubleWidth/Align/Format - Return the size/align/format of &#39;long double&#39;.
Definition: TargetInfo.h:590
std::vector< std::string > MacroIncludes
IntType
===-— Target Data Type Query Methods ----------------------------—===//
Definition: TargetInfo.h:106
Dataflow Directional Tag Classes.
static const char * getTypeFormatModifier(IntType T)
Return the printf format modifier for the specified integer type enum.
Definition: TargetInfo.cpp:201
bool UsePredefines
Initialize the preprocessor with the compiler and target specific predefines.
frontend::ActionKind ProgramAction
The frontend action to perform.
virtual bool hasFloat16Type() const
Determine whether the _Float16 type is supported on this target.
Definition: TargetInfo.h:533
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:685
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:138
virtual bool hasInt128Type() const
Determine whether the __int128 type is supported on this target.
Definition: TargetInfo.h:522
PreprocessorOptions & getPreprocessorOpts() const
Retrieve the preprocessor options used to initialize this preprocessor.
Definition: Preprocessor.h:899
Provides definitions for the atomic synchronization scopes.
DiagnosticsEngine & getDiagnostics() const
Definition: Preprocessor.h:901
const llvm::fltSemantics & getFloatFormat() const
Definition: TargetInfo.h:581
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:299
bool SetUpStaticAnalyzer
Set up preprocessor for RunAnalysis action.
__DEVICE__ int min(int __a, int __b)
uint64_t getPointerAlign(unsigned AddrSpace) const
Definition: TargetInfo.h:363
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:295
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:29
void setSkipMainFilePreamble(unsigned Bytes, bool StartOfLine)
Instruct the preprocessor to skip part of the main source file.
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:125