491 lines
19 KiB
C++
491 lines
19 KiB
C++
//===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the clang::InitializePreprocessor function.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Frontend/InitPreprocessor.h"
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#include "clang/Basic/TargetInfo.h"
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#include "clang/Lex/Preprocessor.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/System/Path.h"
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namespace clang {
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// Append a #define line to Buf for Macro. Macro should be of the form XXX,
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// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
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// "#define XXX Y z W". To get a #define with no value, use "XXX=".
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static void DefineBuiltinMacro(std::vector<char> &Buf, const char *Macro) {
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const char *Command = "#define ";
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Buf.insert(Buf.end(), Command, Command+strlen(Command));
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if (const char *Equal = strchr(Macro, '=')) {
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// Turn the = into ' '.
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Buf.insert(Buf.end(), Macro, Equal);
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Buf.push_back(' ');
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// Per GCC -D semantics, the macro ends at \n if it exists.
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const char *End = strpbrk(Equal, "\n\r");
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if (End) {
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fprintf(stderr, "warning: macro '%s' contains embedded newline, text "
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"after the newline is ignored.\n",
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std::string(Macro, Equal).c_str());
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} else {
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End = Equal+strlen(Equal);
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}
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Buf.insert(Buf.end(), Equal+1, End);
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} else {
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// Push "macroname 1".
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Buf.insert(Buf.end(), Macro, Macro+strlen(Macro));
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Buf.push_back(' ');
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Buf.push_back('1');
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}
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Buf.push_back('\n');
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}
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// Append a #undef line to Buf for Macro. Macro should be of the form XXX
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// and we emit "#undef XXX".
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static void UndefineBuiltinMacro(std::vector<char> &Buf, const char *Macro) {
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// Push "macroname".
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const char *Command = "#undef ";
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Buf.insert(Buf.end(), Command, Command+strlen(Command));
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Buf.insert(Buf.end(), Macro, Macro+strlen(Macro));
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Buf.push_back('\n');
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}
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/// Add the quoted name of an implicit include file.
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static void AddQuotedIncludePath(std::vector<char> &Buf,
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const std::string &File) {
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// Implicit include paths should be resolved relative to the current
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// working directory first, and then use the regular header search
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// mechanism. The proper way to handle this is to have the
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// predefines buffer located at the current working directory, but
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// it has not file entry. For now, workaround this by using an
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// absolute path if we find the file here, and otherwise letting
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// header search handle it.
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llvm::sys::Path Path(File);
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Path.makeAbsolute();
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if (!Path.exists())
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Path = File;
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// Escape double quotes etc.
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Buf.push_back('"');
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std::string EscapedFile = Lexer::Stringify(Path.toString());
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Buf.insert(Buf.end(), EscapedFile.begin(), EscapedFile.end());
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Buf.push_back('"');
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}
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/// AddImplicitInclude - Add an implicit #include of the specified file to the
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/// predefines buffer.
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static void AddImplicitInclude(std::vector<char> &Buf,
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const std::string &File) {
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const char *Inc = "#include ";
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Buf.insert(Buf.end(), Inc, Inc+strlen(Inc));
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AddQuotedIncludePath(Buf, File);
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Buf.push_back('\n');
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}
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static void AddImplicitIncludeMacros(std::vector<char> &Buf,
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const std::string &File) {
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const char *Inc = "#__include_macros ";
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Buf.insert(Buf.end(), Inc, Inc+strlen(Inc));
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AddQuotedIncludePath(Buf, File);
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Buf.push_back('\n');
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// Marker token to stop the __include_macros fetch loop.
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const char *Marker = "##\n"; // ##?
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Buf.insert(Buf.end(), Marker, Marker+strlen(Marker));
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}
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/// AddImplicitIncludePTH - Add an implicit #include using the original file
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/// used to generate a PTH cache.
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static void AddImplicitIncludePTH(std::vector<char> &Buf, Preprocessor &PP,
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const std::string& ImplicitIncludePTH) {
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PTHManager *P = PP.getPTHManager();
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assert(P && "No PTHManager.");
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const char *OriginalFile = P->getOriginalSourceFile();
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if (!OriginalFile) {
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assert(!ImplicitIncludePTH.empty());
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fprintf(stderr, "error: PTH file '%s' does not designate an original "
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"source header file for -include-pth\n",
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ImplicitIncludePTH.c_str());
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exit (1);
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}
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AddImplicitInclude(Buf, OriginalFile);
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}
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/// PickFP - This is used to pick a value based on the FP semantics of the
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/// specified FP model.
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template <typename T>
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static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal,
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T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal,
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T IEEEQuadVal) {
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if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle)
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return IEEESingleVal;
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if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble)
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return IEEEDoubleVal;
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if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended)
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return X87DoubleExtendedVal;
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if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble)
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return PPCDoubleDoubleVal;
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assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad);
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return IEEEQuadVal;
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}
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static void DefineFloatMacros(std::vector<char> &Buf, const char *Prefix,
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const llvm::fltSemantics *Sem) {
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const char *DenormMin, *Epsilon, *Max, *Min;
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DenormMin = PickFP(Sem, "1.40129846e-45F", "4.9406564584124654e-324",
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"3.64519953188247460253e-4951L",
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"4.94065645841246544176568792868221e-324L",
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"6.47517511943802511092443895822764655e-4966L");
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int Digits = PickFP(Sem, 6, 15, 18, 31, 33);
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Epsilon = PickFP(Sem, "1.19209290e-7F", "2.2204460492503131e-16",
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"1.08420217248550443401e-19L",
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"4.94065645841246544176568792868221e-324L",
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"1.92592994438723585305597794258492732e-34L");
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int HasInifinity = 1, HasQuietNaN = 1;
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int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113);
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int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931);
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int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932);
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int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381);
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int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384);
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Min = PickFP(Sem, "1.17549435e-38F", "2.2250738585072014e-308",
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"3.36210314311209350626e-4932L",
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"2.00416836000897277799610805135016e-292L",
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"3.36210314311209350626267781732175260e-4932L");
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Max = PickFP(Sem, "3.40282347e+38F", "1.7976931348623157e+308",
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"1.18973149535723176502e+4932L",
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"1.79769313486231580793728971405301e+308L",
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"1.18973149535723176508575932662800702e+4932L");
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char MacroBuf[100];
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sprintf(MacroBuf, "__%s_DENORM_MIN__=%s", Prefix, DenormMin);
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DefineBuiltinMacro(Buf, MacroBuf);
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sprintf(MacroBuf, "__%s_DIG__=%d", Prefix, Digits);
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DefineBuiltinMacro(Buf, MacroBuf);
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sprintf(MacroBuf, "__%s_EPSILON__=%s", Prefix, Epsilon);
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DefineBuiltinMacro(Buf, MacroBuf);
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sprintf(MacroBuf, "__%s_HAS_INFINITY__=%d", Prefix, HasInifinity);
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DefineBuiltinMacro(Buf, MacroBuf);
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sprintf(MacroBuf, "__%s_HAS_QUIET_NAN__=%d", Prefix, HasQuietNaN);
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DefineBuiltinMacro(Buf, MacroBuf);
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sprintf(MacroBuf, "__%s_MANT_DIG__=%d", Prefix, MantissaDigits);
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DefineBuiltinMacro(Buf, MacroBuf);
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sprintf(MacroBuf, "__%s_MAX_10_EXP__=%d", Prefix, Max10Exp);
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DefineBuiltinMacro(Buf, MacroBuf);
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sprintf(MacroBuf, "__%s_MAX_EXP__=%d", Prefix, MaxExp);
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DefineBuiltinMacro(Buf, MacroBuf);
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sprintf(MacroBuf, "__%s_MAX__=%s", Prefix, Max);
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DefineBuiltinMacro(Buf, MacroBuf);
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sprintf(MacroBuf, "__%s_MIN_10_EXP__=(%d)", Prefix, Min10Exp);
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DefineBuiltinMacro(Buf, MacroBuf);
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sprintf(MacroBuf, "__%s_MIN_EXP__=(%d)", Prefix, MinExp);
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DefineBuiltinMacro(Buf, MacroBuf);
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sprintf(MacroBuf, "__%s_MIN__=%s", Prefix, Min);
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DefineBuiltinMacro(Buf, MacroBuf);
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sprintf(MacroBuf, "__%s_HAS_DENORM__=1", Prefix);
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DefineBuiltinMacro(Buf, MacroBuf);
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}
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/// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro
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/// named MacroName with the max value for a type with width 'TypeWidth' a
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/// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL).
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static void DefineTypeSize(const char *MacroName, unsigned TypeWidth,
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const char *ValSuffix, bool isSigned,
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std::vector<char> &Buf) {
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char MacroBuf[60];
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long long MaxVal;
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if (isSigned)
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MaxVal = (1LL << (TypeWidth - 1)) - 1;
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else
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MaxVal = ~0LL >> (64-TypeWidth);
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sprintf(MacroBuf, "%s=%llu%s", MacroName, MaxVal, ValSuffix);
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DefineBuiltinMacro(Buf, MacroBuf);
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}
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static void DefineType(const char *MacroName, TargetInfo::IntType Ty,
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std::vector<char> &Buf) {
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char MacroBuf[60];
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sprintf(MacroBuf, "%s=%s", MacroName, TargetInfo::getTypeName(Ty));
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DefineBuiltinMacro(Buf, MacroBuf);
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}
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static void InitializePredefinedMacros(const TargetInfo &TI,
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const LangOptions &LangOpts,
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std::vector<char> &Buf) {
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char MacroBuf[60];
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// Compiler version introspection macros.
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DefineBuiltinMacro(Buf, "__llvm__=1"); // LLVM Backend
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DefineBuiltinMacro(Buf, "__clang__=1"); // Clang Frontend
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// Currently claim to be compatible with GCC 4.2.1-5621.
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DefineBuiltinMacro(Buf, "__APPLE_CC__=5621");
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DefineBuiltinMacro(Buf, "__GNUC_MINOR__=2");
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DefineBuiltinMacro(Buf, "__GNUC_PATCHLEVEL__=1");
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DefineBuiltinMacro(Buf, "__GNUC__=4");
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DefineBuiltinMacro(Buf, "__GXX_ABI_VERSION=1002");
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DefineBuiltinMacro(Buf, "__VERSION__=\"4.2.1 Compatible Clang Compiler\"");
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// Initialize language-specific preprocessor defines.
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// These should all be defined in the preprocessor according to the
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// current language configuration.
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if (!LangOpts.Microsoft)
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DefineBuiltinMacro(Buf, "__STDC__=1");
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if (LangOpts.AsmPreprocessor)
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DefineBuiltinMacro(Buf, "__ASSEMBLER__=1");
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if (LangOpts.C99 && !LangOpts.CPlusPlus)
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DefineBuiltinMacro(Buf, "__STDC_VERSION__=199901L");
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else if (0) // STDC94 ?
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DefineBuiltinMacro(Buf, "__STDC_VERSION__=199409L");
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// Standard conforming mode?
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if (!LangOpts.GNUMode)
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DefineBuiltinMacro(Buf, "__STRICT_ANSI__=1");
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if (LangOpts.CPlusPlus0x)
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DefineBuiltinMacro(Buf, "__GXX_EXPERIMENTAL_CXX0X__");
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if (LangOpts.Freestanding)
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DefineBuiltinMacro(Buf, "__STDC_HOSTED__=0");
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else
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DefineBuiltinMacro(Buf, "__STDC_HOSTED__=1");
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if (LangOpts.ObjC1) {
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DefineBuiltinMacro(Buf, "__OBJC__=1");
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if (LangOpts.ObjCNonFragileABI) {
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DefineBuiltinMacro(Buf, "__OBJC2__=1");
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DefineBuiltinMacro(Buf, "OBJC_ZEROCOST_EXCEPTIONS=1");
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DefineBuiltinMacro(Buf, "__EXCEPTIONS=1");
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}
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if (LangOpts.getGCMode() != LangOptions::NonGC)
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DefineBuiltinMacro(Buf, "__OBJC_GC__=1");
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if (LangOpts.NeXTRuntime)
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DefineBuiltinMacro(Buf, "__NEXT_RUNTIME__=1");
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}
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// darwin_constant_cfstrings controls this. This is also dependent
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// on other things like the runtime I believe. This is set even for C code.
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DefineBuiltinMacro(Buf, "__CONSTANT_CFSTRINGS__=1");
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if (LangOpts.ObjC2)
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DefineBuiltinMacro(Buf, "OBJC_NEW_PROPERTIES");
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if (LangOpts.ObjCSenderDispatch)
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DefineBuiltinMacro(Buf, "__OBJC_SENDER_AWARE_DISPATCH__");
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if (LangOpts.PascalStrings)
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DefineBuiltinMacro(Buf, "__PASCAL_STRINGS__");
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if (LangOpts.Blocks) {
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DefineBuiltinMacro(Buf, "__block=__attribute__((__blocks__(byref)))");
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DefineBuiltinMacro(Buf, "__BLOCKS__=1");
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}
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if (LangOpts.CPlusPlus) {
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DefineBuiltinMacro(Buf, "__DEPRECATED=1");
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DefineBuiltinMacro(Buf, "__EXCEPTIONS=1");
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DefineBuiltinMacro(Buf, "__GNUG__=4");
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DefineBuiltinMacro(Buf, "__GXX_WEAK__=1");
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DefineBuiltinMacro(Buf, "__cplusplus=1");
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DefineBuiltinMacro(Buf, "__private_extern__=extern");
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}
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// Filter out some microsoft extensions when trying to parse in ms-compat
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// mode.
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if (LangOpts.Microsoft) {
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DefineBuiltinMacro(Buf, "_cdecl=__cdecl");
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DefineBuiltinMacro(Buf, "__int8=__INT8_TYPE__");
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DefineBuiltinMacro(Buf, "__int16=__INT16_TYPE__");
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DefineBuiltinMacro(Buf, "__int32=__INT32_TYPE__");
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DefineBuiltinMacro(Buf, "__int64=__INT64_TYPE__");
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}
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if (LangOpts.Optimize)
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DefineBuiltinMacro(Buf, "__OPTIMIZE__=1");
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if (LangOpts.OptimizeSize)
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DefineBuiltinMacro(Buf, "__OPTIMIZE_SIZE__=1");
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// Initialize target-specific preprocessor defines.
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// Define type sizing macros based on the target properties.
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assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far");
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DefineBuiltinMacro(Buf, "__CHAR_BIT__=8");
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unsigned IntMaxWidth;
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const char *IntMaxSuffix;
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if (TI.getIntMaxType() == TargetInfo::SignedLongLong) {
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IntMaxWidth = TI.getLongLongWidth();
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IntMaxSuffix = "LL";
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} else if (TI.getIntMaxType() == TargetInfo::SignedLong) {
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IntMaxWidth = TI.getLongWidth();
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IntMaxSuffix = "L";
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} else {
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assert(TI.getIntMaxType() == TargetInfo::SignedInt);
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IntMaxWidth = TI.getIntWidth();
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IntMaxSuffix = "";
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}
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DefineTypeSize("__SCHAR_MAX__", TI.getCharWidth(), "", true, Buf);
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DefineTypeSize("__SHRT_MAX__", TI.getShortWidth(), "", true, Buf);
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DefineTypeSize("__INT_MAX__", TI.getIntWidth(), "", true, Buf);
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DefineTypeSize("__LONG_MAX__", TI.getLongWidth(), "L", true, Buf);
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DefineTypeSize("__LONG_LONG_MAX__", TI.getLongLongWidth(), "LL", true, Buf);
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DefineTypeSize("__WCHAR_MAX__", TI.getWCharWidth(), "", true, Buf);
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DefineTypeSize("__INTMAX_MAX__", IntMaxWidth, IntMaxSuffix, true, Buf);
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DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Buf);
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DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Buf);
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DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Buf);
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DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Buf);
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DefineType("__SIZE_TYPE__", TI.getSizeType(), Buf);
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DefineType("__WCHAR_TYPE__", TI.getWCharType(), Buf);
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// FIXME: TargetInfo hookize __WINT_TYPE__.
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DefineBuiltinMacro(Buf, "__WINT_TYPE__=int");
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DefineFloatMacros(Buf, "FLT", &TI.getFloatFormat());
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DefineFloatMacros(Buf, "DBL", &TI.getDoubleFormat());
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DefineFloatMacros(Buf, "LDBL", &TI.getLongDoubleFormat());
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// Define a __POINTER_WIDTH__ macro for stdint.h.
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sprintf(MacroBuf, "__POINTER_WIDTH__=%d", (int)TI.getPointerWidth(0));
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DefineBuiltinMacro(Buf, MacroBuf);
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if (!LangOpts.CharIsSigned)
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DefineBuiltinMacro(Buf, "__CHAR_UNSIGNED__");
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// Define fixed-sized integer types for stdint.h
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assert(TI.getCharWidth() == 8 && "unsupported target types");
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assert(TI.getShortWidth() == 16 && "unsupported target types");
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DefineBuiltinMacro(Buf, "__INT8_TYPE__=char");
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DefineBuiltinMacro(Buf, "__INT16_TYPE__=short");
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if (TI.getIntWidth() == 32)
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DefineBuiltinMacro(Buf, "__INT32_TYPE__=int");
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else {
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assert(TI.getLongLongWidth() == 32 && "unsupported target types");
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DefineBuiltinMacro(Buf, "__INT32_TYPE__=long long");
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}
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// 16-bit targets doesn't necessarily have a 64-bit type.
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if (TI.getLongLongWidth() == 64)
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DefineBuiltinMacro(Buf, "__INT64_TYPE__=long long");
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// Add __builtin_va_list typedef.
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{
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const char *VAList = TI.getVAListDeclaration();
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Buf.insert(Buf.end(), VAList, VAList+strlen(VAList));
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Buf.push_back('\n');
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}
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if (const char *Prefix = TI.getUserLabelPrefix()) {
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sprintf(MacroBuf, "__USER_LABEL_PREFIX__=%s", Prefix);
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DefineBuiltinMacro(Buf, MacroBuf);
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}
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// Build configuration options. FIXME: these should be controlled by
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// command line options or something.
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DefineBuiltinMacro(Buf, "__FINITE_MATH_ONLY__=0");
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if (LangOpts.GNUInline)
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DefineBuiltinMacro(Buf, "__GNUC_GNU_INLINE__=1");
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else
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DefineBuiltinMacro(Buf, "__GNUC_STDC_INLINE__=1");
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if (LangOpts.NoInline)
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DefineBuiltinMacro(Buf, "__NO_INLINE__=1");
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|
if (unsigned PICLevel = LangOpts.PICLevel) {
|
|
sprintf(MacroBuf, "__PIC__=%d", PICLevel);
|
|
DefineBuiltinMacro(Buf, MacroBuf);
|
|
|
|
sprintf(MacroBuf, "__pic__=%d", PICLevel);
|
|
DefineBuiltinMacro(Buf, MacroBuf);
|
|
}
|
|
|
|
// Macros to control C99 numerics and <float.h>
|
|
DefineBuiltinMacro(Buf, "__FLT_EVAL_METHOD__=0");
|
|
DefineBuiltinMacro(Buf, "__FLT_RADIX__=2");
|
|
sprintf(MacroBuf, "__DECIMAL_DIG__=%d",
|
|
PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36));
|
|
DefineBuiltinMacro(Buf, MacroBuf);
|
|
|
|
// Get other target #defines.
|
|
TI.getTargetDefines(LangOpts, Buf);
|
|
}
|
|
|
|
/// InitializePreprocessor - Initialize the preprocessor getting it and the
|
|
/// environment ready to process a single file. This returns true on error.
|
|
///
|
|
bool InitializePreprocessor(Preprocessor &PP,
|
|
const PreprocessorInitOptions& InitOpts) {
|
|
std::vector<char> PredefineBuffer;
|
|
|
|
const char *LineDirective = "# 1 \"<built-in>\" 3\n";
|
|
PredefineBuffer.insert(PredefineBuffer.end(),
|
|
LineDirective, LineDirective+strlen(LineDirective));
|
|
|
|
// Install things like __POWERPC__, __GNUC__, etc into the macro table.
|
|
InitializePredefinedMacros(PP.getTargetInfo(), PP.getLangOptions(),
|
|
PredefineBuffer);
|
|
|
|
// Add on the predefines from the driver. Wrap in a #line directive to report
|
|
// that they come from the command line.
|
|
LineDirective = "# 1 \"<command line>\" 1\n";
|
|
PredefineBuffer.insert(PredefineBuffer.end(),
|
|
LineDirective, LineDirective+strlen(LineDirective));
|
|
|
|
// Process #define's and #undef's in the order they are given.
|
|
for (PreprocessorInitOptions::macro_iterator I = InitOpts.macro_begin(),
|
|
E = InitOpts.macro_end(); I != E; ++I) {
|
|
if (I->second) // isUndef
|
|
UndefineBuiltinMacro(PredefineBuffer, I->first.c_str());
|
|
else
|
|
DefineBuiltinMacro(PredefineBuffer, I->first.c_str());
|
|
}
|
|
|
|
// If -imacros are specified, include them now. These are processed before
|
|
// any -include directives.
|
|
for (PreprocessorInitOptions::imacro_iterator I = InitOpts.imacro_begin(),
|
|
E = InitOpts.imacro_end(); I != E; ++I)
|
|
AddImplicitIncludeMacros(PredefineBuffer, *I);
|
|
|
|
// Process -include directives.
|
|
for (PreprocessorInitOptions::include_iterator I = InitOpts.include_begin(),
|
|
E = InitOpts.include_end(); I != E; ++I) {
|
|
if (I->second) // isPTH
|
|
AddImplicitIncludePTH(PredefineBuffer, PP, I->first);
|
|
else
|
|
AddImplicitInclude(PredefineBuffer, I->first);
|
|
}
|
|
|
|
LineDirective = "# 2 \"<built-in>\" 2 3\n";
|
|
PredefineBuffer.insert(PredefineBuffer.end(),
|
|
LineDirective, LineDirective+strlen(LineDirective));
|
|
|
|
// Null terminate PredefinedBuffer and add it.
|
|
PredefineBuffer.push_back(0);
|
|
PP.setPredefines(&PredefineBuffer[0]);
|
|
|
|
// Once we've read this, we're done.
|
|
return false;
|
|
}
|
|
|
|
} // namespace clang
|