LangOptions.cpp

Go to the documentation of this file.

//===- LangOptions.cpp - C Language Family Language Options ---------------===//
//
// 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 defines the LangOptions class.
//
//===----------------------------------------------------------------------===//
 
#include "clang/Basic/LangOptions.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Path.h"
 
using namespace clang;
 
LangOptions::LangOptions() : LangStd(LangStandard::lang_unspecified) {
#define LANGOPT(Name, Bits, Default, Description) Name = Default;
#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) set##Name(Default);
#include "clang/Basic/LangOptions.def"
}
 
void LangOptions::resetNonModularOptions() {
#define LANGOPT(Name, Bits, Default, Description)
#define BENIGN_LANGOPT(Name, Bits, Default, Description) Name = Default;
#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
  Name = static_cast<unsigned>(Default);
#include "clang/Basic/LangOptions.def"
 
  // Reset "benign" options with implied values (Options.td ImpliedBy relations)
  // rather than their defaults. This avoids unexpected combinations and
  // invocations that cannot be round-tripped to arguments.
  // FIXME: we should derive this automatically from ImpliedBy in tablegen.
  AllowFPReassoc = UnsafeFPMath;
  NoHonorInfs = FastMath;
  NoHonorNaNs = FastMath;
 
  // These options do not affect AST generation.
  NoSanitizeFiles.clear();
  XRayAlwaysInstrumentFiles.clear();
  XRayNeverInstrumentFiles.clear();
 
  CurrentModule.clear();
  IsHeaderFile = false;
}
 
bool LangOptions::isNoBuiltinFunc(StringRef FuncName) const {
  for (unsigned i = 0, e = NoBuiltinFuncs.size(); i != e; ++i)
    if (FuncName == NoBuiltinFuncs[i])
      return true;
  return false;
}
 
VersionTuple LangOptions::getOpenCLVersionTuple() const {
  const int Ver = OpenCLCPlusPlus ? OpenCLCPlusPlusVersion : OpenCLVersion;
  if (OpenCLCPlusPlus && Ver != 100)
    return VersionTuple(Ver / 100);
  return VersionTuple(Ver / 100, (Ver % 100) / 10);
}
 
unsigned LangOptions::getOpenCLCompatibleVersion() const {
  if (!OpenCLCPlusPlus)
    return OpenCLVersion;
  if (OpenCLCPlusPlusVersion == 100)
    return 200;
  if (OpenCLCPlusPlusVersion == 202100)
    return 300;
  llvm_unreachable("Unknown OpenCL version");
}
 
void LangOptions::remapPathPrefix(SmallVectorImpl<char> &Path) const {
  for (const auto &Entry : MacroPrefixMap)
    if (llvm::sys::path::replace_path_prefix(Path, Entry.first, Entry.second))
      break;
}
 
std::string LangOptions::getOpenCLVersionString() const {
  std::string Result;
  {
    llvm::raw_string_ostream Out(Result);
    Out << (OpenCLCPlusPlus ? "C++ for OpenCL" : "OpenCL C") << " version "
        << getOpenCLVersionTuple().getAsString();
  }
  return Result;
}
 
void LangOptions::setLangDefaults(