InitPreprocessor.cpp | Explore in Territory

//===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the clang::InitializePreprocessor function.
//
//===----------------------------------------------------------------------===//

#include "clang/Basic/FileManager.h"
#include "clang/Basic/HLSLRuntime.h"
#include "clang/Basic/MacroBuilder.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/SyncScope.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/Version.h"
#include "clang/Frontend/FrontendDiagnostic.h"
#include "clang/Frontend/FrontendOptions.h"
#include "clang/Frontend/Utils.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Lex/PreprocessorOptions.h"
#include "clang/Serialization/ASTReader.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
usingnamespaceclang;

static bool MacroBodyEndsInBackslash(StringRef MacroBody) { … }

// 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, StringRef Macro,
                               DiagnosticsEngine &Diags) { … }

/// AddImplicitInclude - Add an implicit \#include of the specified file to the
/// predefines buffer.
/// As these includes are generated by -include arguments the header search
/// logic is going to search relatively to the current working directory.
static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) { … }

static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) { … }

/// Add an implicit \#include using the original file used to generate
/// a PCH file.
static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP,
                                  const PCHContainerReader &PCHContainerRdr,
                                  StringRef ImplicitIncludePCH) { … }

/// 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 IEEEHalfVal, T IEEESingleVal,
                T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal,
                T IEEEQuadVal) { … }

static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix,
                              const llvm::fltSemantics *Sem, StringRef Ext) { … }


/// 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(const Twine &MacroName, unsigned TypeWidth,
                           StringRef ValSuffix, bool isSigned,
                           MacroBuilder &Builder) { … }

/// DefineTypeSize - An overloaded helper that uses TargetInfo to determine
/// the width, suffix, and signedness of the given type
static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty,
                           const TargetInfo &TI, MacroBuilder &Builder) { … }

static void DefineFmt(const LangOptions &LangOpts, const Twine &Prefix,
                      TargetInfo::IntType Ty, const TargetInfo &TI,
                      MacroBuilder &Builder) { … }

static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty,
                       MacroBuilder &Builder) { … }

static void DefineTypeWidth(const Twine &MacroName, TargetInfo::IntType Ty,
                            const TargetInfo &TI, MacroBuilder &Builder) { … }

static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth,
                             const TargetInfo &TI, MacroBuilder &Builder) { … }

// This will generate a macro based on the prefix with `_MAX__` as the suffix
// for the max value representable for the type, and a macro with a `_WIDTH__`
// suffix for the width of the type.
static void DefineTypeSizeAndWidth(const Twine &Prefix, TargetInfo::IntType Ty,
                                   const TargetInfo &TI,
                                   MacroBuilder &Builder) { … }

static void DefineExactWidthIntType(const LangOptions &LangOpts,
                                    TargetInfo::IntType Ty,
                                    const TargetInfo &TI,
                                    MacroBuilder &Builder) { … }

static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty,
                                        const TargetInfo &TI,
                                        MacroBuilder &Builder) { … }

static void DefineLeastWidthIntType(const LangOptions &LangOpts,
                                    unsigned TypeWidth, bool IsSigned,
                                    const TargetInfo &TI,
                                    MacroBuilder &Builder) { … }

static void DefineFastIntType(const LangOptions &LangOpts, unsigned TypeWidth,
                              bool IsSigned, const TargetInfo &TI,
                              MacroBuilder &Builder) { … }


/// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with
/// the specified properties.
static const char *getLockFreeValue(unsigned TypeWidth, const TargetInfo &TI) { … }

/// Add definitions required for a smooth interaction between
/// Objective-C++ automated reference counting and libstdc++ (4.2).
static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts,
                                         MacroBuilder &Builder) { … }

static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
                                               const LangOptions &LangOpts,
                                               const FrontendOptions &FEOpts,
                                               MacroBuilder &Builder) { … }

/// Initialize the predefined C++ language feature test macros defined in
/// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations".
static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts,
                                                 MacroBuilder &Builder) { … }

/// InitializeOpenCLFeatureTestMacros - Define OpenCL macros based on target
/// settings and language version
void InitializeOpenCLFeatureTestMacros(const TargetInfo &TI,
                                       const LangOptions &Opts,
                                       MacroBuilder &Builder) { … }

llvm::SmallString<32> ConstructFixedPointLiteral(llvm::APFixedPoint Val,
                                                 llvm::StringRef Suffix) { … }

void DefineFixedPointMacros(const TargetInfo &TI, MacroBuilder &Builder,
                            llvm::StringRef TypeName, llvm::StringRef Suffix,
                            unsigned Width, unsigned Scale, bool Signed) { … }

static void InitializePredefinedMacros(const TargetInfo &TI,
                                       const LangOptions &LangOpts,
                                       const FrontendOptions &FEOpts,
                                       const PreprocessorOptions &PPOpts,
                                       MacroBuilder &Builder) { … }

static void InitializePGOProfileMacros(const CodeGenOptions &CodeGenOpts,
                                       MacroBuilder &Builder) { … }

/// InitializePreprocessor - Initialize the preprocessor getting it and the
/// environment ready to process a single file.
void clang::InitializePreprocessor(Preprocessor &PP,
                                   const PreprocessorOptions &InitOpts,
                                   const PCHContainerReader &PCHContainerRdr,
                                   const FrontendOptions &FEOpts,
                                   const CodeGenOptions &CodeGenOpts) { … }
llvm/clang/lib/Frontend/InitPreprocessor.cpp
