mirror of
https://github.com/capstone-engine/llvm-capstone.git
synced 2025-05-19 12:26:57 +00:00
2cb2cd242c
C89 allowed a type specifier to be elided with the resulting type being int, aka implicit int behavior. This feature was subsequently removed in C99 without a deprecation period, so implementations continued to support the feature. Now, as with implicit function declarations, is a good time to reevaluate the need for this support. This patch allows -Wimplicit-int to issue warnings in C89 mode (off by default), defaults the warning to an error in C99 through C17, and disables support for the feature entirely in C2x. It also removes a warning about missing declaration specifiers that really was just an implicit int warning in disguise and other minor related cleanups.
219 lines
8.0 KiB
C++
219 lines
8.0 KiB
C++
//===- 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"
|
|
|
|
// 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.equals(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(SmallString<256> &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(LangOptions &Opts, Language Lang,
|
|
const llvm::Triple &T,
|
|
std::vector<std::string> &Includes,
|
|
LangStandard::Kind LangStd) {
|
|
// Set some properties which depend solely on the input kind; it would be nice
|
|
// to move these to the language standard, and have the driver resolve the
|
|
// input kind + language standard.
|
|
//
|
|
// FIXME: Perhaps a better model would be for a single source file to have
|
|
// multiple language standards (C / C++ std, ObjC std, OpenCL std, OpenMP std)
|
|
// simultaneously active?
|
|
if (Lang == Language::Asm) {
|
|
Opts.AsmPreprocessor = 1;
|
|
} else if (Lang == Language::ObjC || Lang == Language::ObjCXX) {
|
|
Opts.ObjC = 1;
|
|
}
|
|
|
|
if (LangStd == LangStandard::lang_unspecified)
|
|
LangStd = getDefaultLanguageStandard(Lang, T);
|
|
const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
|
|
Opts.LangStd = LangStd;
|
|
Opts.LineComment = Std.hasLineComments();
|
|
Opts.C99 = Std.isC99();
|
|
Opts.C11 = Std.isC11();
|
|
Opts.C17 = Std.isC17();
|
|
Opts.C2x = Std.isC2x();
|
|
Opts.CPlusPlus = Std.isCPlusPlus();
|
|
Opts.CPlusPlus11 = Std.isCPlusPlus11();
|
|
Opts.CPlusPlus14 = Std.isCPlusPlus14();
|
|
Opts.CPlusPlus17 = Std.isCPlusPlus17();
|
|
Opts.CPlusPlus20 = Std.isCPlusPlus20();
|
|
Opts.CPlusPlus2b = Std.isCPlusPlus2b();
|
|
Opts.GNUMode = Std.isGNUMode();
|
|
Opts.GNUCVersion = 0;
|
|
Opts.HexFloats = Std.hasHexFloats();
|
|
Opts.WChar = Std.isCPlusPlus();
|
|
Opts.Digraphs = Std.hasDigraphs();
|
|
|
|
Opts.HLSL = Lang == Language::HLSL;
|
|
|
|
// Set OpenCL Version.
|
|
Opts.OpenCL = Std.isOpenCL();
|
|
if (LangStd == LangStandard::lang_opencl10)
|
|
Opts.OpenCLVersion = 100;
|
|
else if (LangStd == LangStandard::lang_opencl11)
|
|
Opts.OpenCLVersion = 110;
|
|
else if (LangStd == LangStandard::lang_opencl12)
|
|
Opts.OpenCLVersion = 120;
|
|
else if (LangStd == LangStandard::lang_opencl20)
|
|
Opts.OpenCLVersion = 200;
|
|
else if (LangStd == LangStandard::lang_opencl30)
|
|
Opts.OpenCLVersion = 300;
|
|
else if (LangStd == LangStandard::lang_openclcpp10)
|
|
Opts.OpenCLCPlusPlusVersion = 100;
|
|
else if (LangStd == LangStandard::lang_openclcpp2021)
|
|
Opts.OpenCLCPlusPlusVersion = 202100;
|
|
else if (LangStd == LangStandard::lang_hlsl2015)
|
|
Opts.HLSLVersion = (unsigned)LangOptions::HLSL_2015;
|
|
else if (LangStd == LangStandard::lang_hlsl2016)
|
|
Opts.HLSLVersion = (unsigned)LangOptions::HLSL_2016;
|
|
else if (LangStd == LangStandard::lang_hlsl2017)
|
|
Opts.HLSLVersion = (unsigned)LangOptions::HLSL_2017;
|
|
else if (LangStd == LangStandard::lang_hlsl2018)
|
|
Opts.HLSLVersion = (unsigned)LangOptions::HLSL_2018;
|
|
else if (LangStd == LangStandard::lang_hlsl2021)
|
|
Opts.HLSLVersion = (unsigned)LangOptions::HLSL_2021;
|
|
else if (LangStd == LangStandard::lang_hlsl202x)
|
|
Opts.HLSLVersion = (unsigned)LangOptions::HLSL_202x;
|
|
|
|
// OpenCL has some additional defaults.
|
|
if (Opts.OpenCL) {
|
|
Opts.AltiVec = 0;
|
|
Opts.ZVector = 0;
|
|
Opts.setDefaultFPContractMode(LangOptions::FPM_On);
|
|
Opts.OpenCLCPlusPlus = Opts.CPlusPlus;
|
|
Opts.OpenCLPipes = Opts.getOpenCLCompatibleVersion() == 200;
|
|
Opts.OpenCLGenericAddressSpace = Opts.getOpenCLCompatibleVersion() == 200;
|
|
|
|
// Include default header file for OpenCL.
|
|
if (Opts.IncludeDefaultHeader) {
|
|
if (Opts.DeclareOpenCLBuiltins) {
|
|
// Only include base header file for builtin types and constants.
|
|
Includes.push_back("opencl-c-base.h");
|
|
} else {
|
|
Includes.push_back("opencl-c.h");
|
|
}
|
|
}
|
|
}
|
|
|
|
Opts.HIP = Lang == Language::HIP;
|
|
Opts.CUDA = Lang == Language::CUDA || Opts.HIP;
|
|
if (Opts.HIP) {
|
|
// HIP toolchain does not support 'Fast' FPOpFusion in backends since it
|
|
// fuses multiplication/addition instructions without contract flag from
|
|
// device library functions in LLVM bitcode, which causes accuracy loss in
|
|
// certain math functions, e.g. tan(-1e20) becomes -0.933 instead of 0.8446.
|
|
// For device library functions in bitcode to work, 'Strict' or 'Standard'
|
|
// FPOpFusion options in backends is needed. Therefore 'fast-honor-pragmas'
|
|
// FP contract option is used to allow fuse across statements in frontend
|
|
// whereas respecting contract flag in backend.
|
|
Opts.setDefaultFPContractMode(LangOptions::FPM_FastHonorPragmas);
|
|
} else if (Opts.CUDA) {
|
|
if (T.isSPIRV()) {
|
|
// Emit OpenCL version metadata in LLVM IR when targeting SPIR-V.
|
|
Opts.OpenCLVersion = 200;
|
|
}
|
|
// Allow fuse across statements disregarding pragmas.
|
|
Opts.setDefaultFPContractMode(LangOptions::FPM_Fast);
|
|
}
|
|
|
|
Opts.RenderScript = Lang == Language::RenderScript;
|
|
|
|
// OpenCL, C++ and C2x have bool, true, false keywords.
|
|
Opts.Bool = Opts.OpenCL || Opts.CPlusPlus || Opts.C2x;
|
|
|
|
// OpenCL has half keyword
|
|
Opts.Half = Opts.OpenCL;
|
|
}
|
|
|
|
FPOptions FPOptions::defaultWithoutTrailingStorage(const LangOptions &LO) {
|
|
FPOptions result(LO);
|
|
return result;
|
|
}
|
|
|
|
LLVM_DUMP_METHOD void FPOptions::dump() {
|
|
#define OPTION(NAME, TYPE, WIDTH, PREVIOUS) \
|
|
llvm::errs() << "\n " #NAME " " << get##NAME();
|
|
#include "clang/Basic/FPOptions.def"
|
|
llvm::errs() << "\n";
|
|
}
|
|
|
|
LLVM_DUMP_METHOD void FPOptionsOverride::dump() {
|
|
#define OPTION(NAME, TYPE, WIDTH, PREVIOUS) \
|
|
if (has##NAME##Override()) \
|
|
llvm::errs() << "\n " #NAME " Override is " << get##NAME##Override();
|
|
#include "clang/Basic/FPOptions.def"
|
|
llvm::errs() << "\n";
|
|
}
|