Check in LLVM r95781.
diff --git a/lib/Frontend/InitPreprocessor.cpp b/lib/Frontend/InitPreprocessor.cpp
new file mode 100644
index 0000000..9aaf132
--- /dev/null
+++ b/lib/Frontend/InitPreprocessor.cpp
@@ -0,0 +1,547 @@
+//===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the clang::InitializePreprocessor function.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Frontend/Utils.h"
+#include "clang/Basic/MacroBuilder.h"
+#include "clang/Basic/TargetInfo.h"
+#include "clang/Frontend/FrontendDiagnostic.h"
+#include "clang/Frontend/FrontendOptions.h"
+#include "clang/Frontend/PreprocessorOptions.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/SourceManager.h"
+#include "llvm/ADT/APFloat.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/System/Path.h"
+using namespace clang;
+
+// Append a #define line to Buf for Macro. Macro should be of the form XXX,
+// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
+// "#define XXX Y z W". To get a #define with no value, use "XXX=".
+static void DefineBuiltinMacro(MacroBuilder &Builder, llvm::StringRef Macro,
+ Diagnostic &Diags) {
+ std::pair<llvm::StringRef, llvm::StringRef> MacroPair = Macro.split('=');
+ llvm::StringRef MacroName = MacroPair.first;
+ llvm::StringRef MacroBody = MacroPair.second;
+ if (MacroName.size() != Macro.size()) {
+ // Per GCC -D semantics, the macro ends at \n if it exists.
+ llvm::StringRef::size_type End = MacroBody.find_first_of("\n\r");
+ if (End != llvm::StringRef::npos)
+ Diags.Report(diag::warn_fe_macro_contains_embedded_newline)
+ << MacroName;
+ Builder.defineMacro(MacroName, MacroBody.substr(0, End));
+ } else {
+ // Push "macroname 1".
+ Builder.defineMacro(Macro);
+ }
+}
+
+std::string clang::NormalizeDashIncludePath(llvm::StringRef File) {
+ // Implicit include paths should be resolved relative to the current
+ // working directory first, and then use the regular header search
+ // mechanism. The proper way to handle this is to have the
+ // predefines buffer located at the current working directory, but
+ // it has not file entry. For now, workaround this by using an
+ // absolute path if we find the file here, and otherwise letting
+ // header search handle it.
+ llvm::sys::Path Path(File);
+ Path.makeAbsolute();
+ if (!Path.exists())
+ Path = File;
+
+ return Lexer::Stringify(Path.str());
+}
+
+/// AddImplicitInclude - Add an implicit #include of the specified file to the
+/// predefines buffer.
+static void AddImplicitInclude(MacroBuilder &Builder, llvm::StringRef File) {
+ Builder.append("#include \"" +
+ llvm::Twine(NormalizeDashIncludePath(File)) + "\"");
+}
+
+static void AddImplicitIncludeMacros(MacroBuilder &Builder,
+ llvm::StringRef File) {
+ Builder.append("#__include_macros \"" +
+ llvm::Twine(NormalizeDashIncludePath(File)) + "\"");
+ // Marker token to stop the __include_macros fetch loop.
+ Builder.append("##"); // ##?
+}
+
+/// AddImplicitIncludePTH - Add an implicit #include using the original file
+/// used to generate a PTH cache.
+static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP,
+ llvm::StringRef ImplicitIncludePTH) {
+ PTHManager *P = PP.getPTHManager();
+ assert(P && "No PTHManager.");
+ const char *OriginalFile = P->getOriginalSourceFile();
+
+ if (!OriginalFile) {
+ PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header)
+ << ImplicitIncludePTH;
+ return;
+ }
+
+ AddImplicitInclude(Builder, OriginalFile);
+}
+
+/// PickFP - This is used to pick a value based on the FP semantics of the
+/// specified FP model.
+template <typename T>
+static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal,
+ T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal,
+ T IEEEQuadVal) {
+ if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle)
+ return IEEESingleVal;
+ if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble)
+ return IEEEDoubleVal;
+ if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended)
+ return X87DoubleExtendedVal;
+ if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble)
+ return PPCDoubleDoubleVal;
+ assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad);
+ return IEEEQuadVal;
+}
+
+static void DefineFloatMacros(MacroBuilder &Builder, llvm::StringRef Prefix,
+ const llvm::fltSemantics *Sem) {
+ const char *DenormMin, *Epsilon, *Max, *Min;
+ DenormMin = PickFP(Sem, "1.40129846e-45F", "4.9406564584124654e-324",
+ "3.64519953188247460253e-4951L",
+ "4.94065645841246544176568792868221e-324L",
+ "6.47517511943802511092443895822764655e-4966L");
+ int Digits = PickFP(Sem, 6, 15, 18, 31, 33);
+ Epsilon = PickFP(Sem, "1.19209290e-7F", "2.2204460492503131e-16",
+ "1.08420217248550443401e-19L",
+ "4.94065645841246544176568792868221e-324L",
+ "1.92592994438723585305597794258492732e-34L");
+ int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113);
+ int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931);
+ int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932);
+ int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381);
+ int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384);
+ Min = PickFP(Sem, "1.17549435e-38F", "2.2250738585072014e-308",
+ "3.36210314311209350626e-4932L",
+ "2.00416836000897277799610805135016e-292L",
+ "3.36210314311209350626267781732175260e-4932L");
+ Max = PickFP(Sem, "3.40282347e+38F", "1.7976931348623157e+308",
+ "1.18973149535723176502e+4932L",
+ "1.79769313486231580793728971405301e+308L",
+ "1.18973149535723176508575932662800702e+4932L");
+
+ llvm::SmallString<32> DefPrefix;
+ DefPrefix = "__";
+ DefPrefix += Prefix;
+ DefPrefix += "_";
+
+ Builder.defineMacro(DefPrefix + "DENORM_MIN__", DenormMin);
+ Builder.defineMacro(DefPrefix + "HAS_DENORM__");
+ Builder.defineMacro(DefPrefix + "DIG__", llvm::Twine(Digits));
+ Builder.defineMacro(DefPrefix + "EPSILON__", llvm::Twine(Epsilon));
+ Builder.defineMacro(DefPrefix + "HAS_INFINITY__");
+ Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__");
+ Builder.defineMacro(DefPrefix + "MANT_DIG__", llvm::Twine(MantissaDigits));
+
+ Builder.defineMacro(DefPrefix + "MAX_10_EXP__", llvm::Twine(Max10Exp));
+ Builder.defineMacro(DefPrefix + "MAX_EXP__", llvm::Twine(MaxExp));
+ Builder.defineMacro(DefPrefix + "MAX__", llvm::Twine(Max));
+
+ Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+llvm::Twine(Min10Exp)+")");
+ Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+llvm::Twine(MinExp)+")");
+ Builder.defineMacro(DefPrefix + "MIN__", llvm::Twine(Min));
+}
+
+
+/// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro
+/// named MacroName with the max value for a type with width 'TypeWidth' a
+/// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL).
+static void DefineTypeSize(llvm::StringRef MacroName, unsigned TypeWidth,
+ llvm::StringRef ValSuffix, bool isSigned,
+ MacroBuilder& Builder) {
+ long long MaxVal;
+ if (isSigned)
+ MaxVal = (1LL << (TypeWidth - 1)) - 1;
+ else
+ MaxVal = ~0LL >> (64-TypeWidth);
+
+ Builder.defineMacro(MacroName, llvm::Twine(MaxVal) + ValSuffix);
+}
+
+/// DefineTypeSize - An overloaded helper that uses TargetInfo to determine
+/// the width, suffix, and signedness of the given type
+static void DefineTypeSize(llvm::StringRef MacroName, TargetInfo::IntType Ty,
+ const TargetInfo &TI, MacroBuilder &Builder) {
+ DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty),
+ TI.isTypeSigned(Ty), Builder);
+}
+
+static void DefineType(const llvm::Twine &MacroName, TargetInfo::IntType Ty,
+ MacroBuilder &Builder) {
+ Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty));
+}
+
+static void DefineTypeWidth(llvm::StringRef MacroName, TargetInfo::IntType Ty,
+ const TargetInfo &TI, MacroBuilder &Builder) {
+ Builder.defineMacro(MacroName, llvm::Twine(TI.getTypeWidth(Ty)));
+}
+
+static void DefineExactWidthIntType(TargetInfo::IntType Ty,
+ const TargetInfo &TI, MacroBuilder &Builder) {
+ int TypeWidth = TI.getTypeWidth(Ty);
+ DefineType("__INT" + llvm::Twine(TypeWidth) + "_TYPE__", Ty, Builder);
+
+ llvm::StringRef ConstSuffix(TargetInfo::getTypeConstantSuffix(Ty));
+ if (!ConstSuffix.empty())
+ Builder.defineMacro("__INT" + llvm::Twine(TypeWidth) + "_C_SUFFIX__",
+ ConstSuffix);
+}
+
+static void InitializePredefinedMacros(const TargetInfo &TI,
+ const LangOptions &LangOpts,
+ const FrontendOptions &FEOpts,
+ MacroBuilder &Builder) {
+ // Compiler version introspection macros.
+ Builder.defineMacro("__llvm__"); // LLVM Backend
+ Builder.defineMacro("__clang__"); // Clang Frontend
+
+ // Currently claim to be compatible with GCC 4.2.1-5621.
+ Builder.defineMacro("__GNUC_MINOR__", "2");
+ Builder.defineMacro("__GNUC_PATCHLEVEL__", "1");
+ Builder.defineMacro("__GNUC__", "4");
+ Builder.defineMacro("__GXX_ABI_VERSION", "1002");
+ Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible Clang Compiler\"");
+
+ // Initialize language-specific preprocessor defines.
+
+ // These should all be defined in the preprocessor according to the
+ // current language configuration.
+ if (!LangOpts.Microsoft)
+ Builder.defineMacro("__STDC__");
+ if (LangOpts.AsmPreprocessor)
+ Builder.defineMacro("__ASSEMBLER__");
+
+ if (!LangOpts.CPlusPlus) {
+ if (LangOpts.C99)
+ Builder.defineMacro("__STDC_VERSION__", "199901L");
+ else if (!LangOpts.GNUMode && LangOpts.Digraphs)
+ Builder.defineMacro("__STDC_VERSION__", "199409L");
+ }
+
+ // Standard conforming mode?
+ if (!LangOpts.GNUMode)
+ Builder.defineMacro("__STRICT_ANSI__");
+
+ if (LangOpts.CPlusPlus0x)
+ Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");
+
+ if (LangOpts.Freestanding)
+ Builder.defineMacro("__STDC_HOSTED__", "0");
+ else
+ Builder.defineMacro("__STDC_HOSTED__");
+
+ if (LangOpts.ObjC1) {
+ Builder.defineMacro("__OBJC__");
+ if (LangOpts.ObjCNonFragileABI) {
+ Builder.defineMacro("__OBJC2__");
+ Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
+ }
+
+ if (LangOpts.getGCMode() != LangOptions::NonGC)
+ Builder.defineMacro("__OBJC_GC__");
+
+ if (LangOpts.NeXTRuntime)
+ Builder.defineMacro("__NEXT_RUNTIME__");
+ }
+
+ // darwin_constant_cfstrings controls this. This is also dependent
+ // on other things like the runtime I believe. This is set even for C code.
+ Builder.defineMacro("__CONSTANT_CFSTRINGS__");
+
+ if (LangOpts.ObjC2)
+ Builder.defineMacro("OBJC_NEW_PROPERTIES");
+
+ if (LangOpts.PascalStrings)
+ Builder.defineMacro("__PASCAL_STRINGS__");
+
+ if (LangOpts.Blocks) {
+ Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))");
+ Builder.defineMacro("__BLOCKS__");
+ }
+
+ if (LangOpts.Exceptions)
+ Builder.defineMacro("__EXCEPTIONS");
+
+ if (LangOpts.CPlusPlus) {
+ Builder.defineMacro("__DEPRECATED");
+ Builder.defineMacro("__GNUG__", "4");
+ Builder.defineMacro("__GXX_WEAK__");
+ if (LangOpts.GNUMode)
+ Builder.defineMacro("__cplusplus");
+ else
+ // C++ [cpp.predefined]p1:
+ // The name_ _cplusplusis defined to the value199711Lwhen compiling a
+ // C++ translation unit.
+ Builder.defineMacro("__cplusplus", "199711L");
+ Builder.defineMacro("__private_extern__", "extern");
+ // Ugly hack to work with GNU libstdc++.
+ Builder.defineMacro("_GNU_SOURCE");
+ }
+
+ if (LangOpts.Microsoft) {
+ // Filter out some microsoft extensions when trying to parse in ms-compat
+ // mode.
+ Builder.defineMacro("__int8", "__INT8_TYPE__");
+ Builder.defineMacro("__int16", "__INT16_TYPE__");
+ Builder.defineMacro("__int32", "__INT32_TYPE__");
+ Builder.defineMacro("__int64", "__INT64_TYPE__");
+ // Both __PRETTY_FUNCTION__ and __FUNCTION__ are GCC extensions, however
+ // VC++ appears to only like __FUNCTION__.
+ Builder.defineMacro("__PRETTY_FUNCTION__", "__FUNCTION__");
+ // Work around some issues with Visual C++ headerws.
+ if (LangOpts.CPlusPlus) {
+ // Since we define wchar_t in C++ mode.
+ Builder.defineMacro("_WCHAR_T_DEFINED");
+ Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED");
+ // FIXME: This should be temporary until we have a __pragma
+ // solution, to avoid some errors flagged in VC++ headers.
+ Builder.defineMacro("_CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES", "0");
+ }
+ }
+
+ if (LangOpts.Optimize)
+ Builder.defineMacro("__OPTIMIZE__");
+ if (LangOpts.OptimizeSize)
+ Builder.defineMacro("__OPTIMIZE_SIZE__");
+
+ // Initialize target-specific preprocessor defines.
+
+ // Define type sizing macros based on the target properties.
+ assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far");
+ Builder.defineMacro("__CHAR_BIT__", "8");
+
+ DefineTypeSize("__SCHAR_MAX__", TI.getCharWidth(), "", true, Builder);
+ DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder);
+ DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder);
+ DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder);
+ DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder);
+ DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder);
+ DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder);
+
+ DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder);
+ DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder);
+ DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder);
+ DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder);
+ DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder);
+ DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder);
+ DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder);
+ DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder);
+ DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder);
+ DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder);
+ DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder);
+ DefineType("__WINT_TYPE__", TI.getWIntType(), Builder);
+ DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder);
+ DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder);
+
+ DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat());
+ DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat());
+ DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat());
+
+ // Define a __POINTER_WIDTH__ macro for stdint.h.
+ Builder.defineMacro("__POINTER_WIDTH__",
+ llvm::Twine((int)TI.getPointerWidth(0)));
+
+ if (!LangOpts.CharIsSigned)
+ Builder.defineMacro("__CHAR_UNSIGNED__");
+
+ // Define exact-width integer types for stdint.h
+ Builder.defineMacro("__INT" + llvm::Twine(TI.getCharWidth()) + "_TYPE__",
+ "char");
+
+ if (TI.getShortWidth() > TI.getCharWidth())
+ DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder);
+
+ if (TI.getIntWidth() > TI.getShortWidth())
+ DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder);
+
+ if (TI.getLongWidth() > TI.getIntWidth())
+ DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder);
+
+ if (TI.getLongLongWidth() > TI.getLongWidth())
+ DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder);
+
+ // Add __builtin_va_list typedef.
+ Builder.append(TI.getVAListDeclaration());
+
+ if (const char *Prefix = TI.getUserLabelPrefix())
+ Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix);
+
+ // Build configuration options. FIXME: these should be controlled by
+ // command line options or something.
+ Builder.defineMacro("__FINITE_MATH_ONLY__", "0");
+
+ if (LangOpts.GNUInline)
+ Builder.defineMacro("__GNUC_GNU_INLINE__");
+ else
+ Builder.defineMacro("__GNUC_STDC_INLINE__");
+
+ if (LangOpts.NoInline)
+ Builder.defineMacro("__NO_INLINE__");
+
+ if (unsigned PICLevel = LangOpts.PICLevel) {
+ Builder.defineMacro("__PIC__", llvm::Twine(PICLevel));
+ Builder.defineMacro("__pic__", llvm::Twine(PICLevel));
+ }
+
+ // Macros to control C99 numerics and <float.h>
+ Builder.defineMacro("__FLT_EVAL_METHOD__", "0");
+ Builder.defineMacro("__FLT_RADIX__", "2");
+ int Dig = PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36);
+ Builder.defineMacro("__DECIMAL_DIG__", llvm::Twine(Dig));
+
+ if (LangOpts.getStackProtectorMode() == LangOptions::SSPOn)
+ Builder.defineMacro("__SSP__");
+ else if (LangOpts.getStackProtectorMode() == LangOptions::SSPReq)
+ Builder.defineMacro("__SSP_ALL__", "2");
+
+ if (FEOpts.ProgramAction == frontend::RewriteObjC)
+ Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
+ // Get other target #defines.
+ TI.getTargetDefines(LangOpts, Builder);
+}
+
+// Initialize the remapping of files to alternative contents, e.g.,
+// those specified through other files.
+static void InitializeFileRemapping(Diagnostic &Diags,
+ SourceManager &SourceMgr,
+ FileManager &FileMgr,
+ const PreprocessorOptions &InitOpts) {
+ // Remap files in the source manager (with buffers).
+ for (PreprocessorOptions::remapped_file_buffer_iterator
+ Remap = InitOpts.remapped_file_buffer_begin(),
+ RemapEnd = InitOpts.remapped_file_buffer_end();
+ Remap != RemapEnd;
+ ++Remap) {
+ // Create the file entry for the file that we're mapping from.
+ const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first,
+ Remap->second->getBufferSize(),
+ 0);
+ if (!FromFile) {
+ Diags.Report(diag::err_fe_remap_missing_from_file)
+ << Remap->first;
+ continue;
+ }
+
+ // Override the contents of the "from" file with the contents of
+ // the "to" file.
+ SourceMgr.overrideFileContents(FromFile, Remap->second);
+ }
+
+ // Remap files in the source manager (with other files).
+ for (PreprocessorOptions::remapped_file_iterator
+ Remap = InitOpts.remapped_file_begin(),
+ RemapEnd = InitOpts.remapped_file_end();
+ Remap != RemapEnd;
+ ++Remap) {
+ // Find the file that we're mapping to.
+ const FileEntry *ToFile = FileMgr.getFile(Remap->second);
+ if (!ToFile) {
+ Diags.Report(diag::err_fe_remap_missing_to_file)
+ << Remap->first << Remap->second;
+ continue;
+ }
+
+ // Create the file entry for the file that we're mapping from.
+ const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first,
+ ToFile->getSize(),
+ 0);
+ if (!FromFile) {
+ Diags.Report(diag::err_fe_remap_missing_from_file)
+ << Remap->first;
+ continue;
+ }
+
+ // Load the contents of the file we're mapping to.
+ std::string ErrorStr;
+ const llvm::MemoryBuffer *Buffer
+ = llvm::MemoryBuffer::getFile(ToFile->getName(), &ErrorStr);
+ if (!Buffer) {
+ Diags.Report(diag::err_fe_error_opening)
+ << Remap->second << ErrorStr;
+ continue;
+ }
+
+ // Override the contents of the "from" file with the contents of
+ // the "to" file.
+ SourceMgr.overrideFileContents(FromFile, Buffer);
+ }
+}
+
+/// InitializePreprocessor - Initialize the preprocessor getting it and the
+/// environment ready to process a single file. This returns true on error.
+///
+void clang::InitializePreprocessor(Preprocessor &PP,
+ const PreprocessorOptions &InitOpts,
+ const HeaderSearchOptions &HSOpts,
+ const FrontendOptions &FEOpts) {
+ std::string PredefineBuffer;
+ PredefineBuffer.reserve(4080);
+ llvm::raw_string_ostream Predefines(PredefineBuffer);
+ MacroBuilder Builder(Predefines);
+
+ InitializeFileRemapping(PP.getDiagnostics(), PP.getSourceManager(),
+ PP.getFileManager(), InitOpts);
+
+ Builder.append("# 1 \"<built-in>\" 3");
+
+ // Install things like __POWERPC__, __GNUC__, etc into the macro table.
+ if (InitOpts.UsePredefines)
+ InitializePredefinedMacros(PP.getTargetInfo(), PP.getLangOptions(),
+ FEOpts, Builder);
+
+ // Add on the predefines from the driver. Wrap in a #line directive to report
+ // that they come from the command line.
+ Builder.append("# 1 \"<command line>\" 1");
+
+ // Process #define's and #undef's in the order they are given.
+ for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) {
+ if (InitOpts.Macros[i].second) // isUndef
+ Builder.undefineMacro(InitOpts.Macros[i].first);
+ else
+ DefineBuiltinMacro(Builder, InitOpts.Macros[i].first,
+ PP.getDiagnostics());
+ }
+
+ // If -imacros are specified, include them now. These are processed before
+ // any -include directives.
+ for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
+ AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]);
+
+ // Process -include directives.
+ for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
+ const std::string &Path = InitOpts.Includes[i];
+ if (Path == InitOpts.ImplicitPTHInclude)
+ AddImplicitIncludePTH(Builder, PP, Path);
+ else
+ AddImplicitInclude(Builder, Path);
+ }
+
+ // Exit the command line and go back to <built-in> (2 is LC_LEAVE).
+ Builder.append("# 1 \"<built-in>\" 2");
+
+ // Copy PredefinedBuffer into the Preprocessor.
+ PP.setPredefines(Predefines.str());
+
+ // Initialize the header search object.
+ ApplyHeaderSearchOptions(PP.getHeaderSearchInfo(), HSOpts,
+ PP.getLangOptions(),
+ PP.getTargetInfo().getTriple());
+}