6c75ab5f66
WG14 adopted the _ExtInt feature from Clang for C23, but renamed the type to be _BitInt. This patch does the vast majority of the work to rename _ExtInt to _BitInt, which accounts for most of its size. The new type is exposed in older C modes and all C++ modes as a conforming extension. However, there are functional changes worth calling out: * Deprecates _ExtInt with a fix-it to help users migrate to _BitInt. * Updates the mangling for the type. * Updates the documentation and adds a release note to warn users what is going on. * Adds new diagnostics for use of _BitInt to call out when it's used as a Clang extension or as a pre-C23 compatibility concern. * Adds new tests for the new diagnostic behaviors. I want to call out the ABI break specifically. We do not believe that this break will cause a significant imposition for early adopters of the feature, and so this is being done as a full break. If it turns out there are critical uses where recompilation is not an option for some reason, we can consider using ABI tags to ease the transition.
89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
//===--- PNaCl.h - Declare PNaCl target feature support ---------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares PNaCl TargetInfo objects.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_PNACL_H
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#define LLVM_CLANG_LIB_BASIC_TARGETS_PNACL_H
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#include "Mips.h"
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#include "clang/Basic/TargetInfo.h"
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#include "clang/Basic/TargetOptions.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Support/Compiler.h"
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namespace clang {
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namespace targets {
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class LLVM_LIBRARY_VISIBILITY PNaClTargetInfo : public TargetInfo {
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public:
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PNaClTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
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: TargetInfo(Triple) {
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this->LongAlign = 32;
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this->LongWidth = 32;
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this->PointerAlign = 32;
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this->PointerWidth = 32;
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this->IntMaxType = TargetInfo::SignedLongLong;
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this->Int64Type = TargetInfo::SignedLongLong;
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this->DoubleAlign = 64;
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this->LongDoubleWidth = 64;
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this->LongDoubleAlign = 64;
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this->SizeType = TargetInfo::UnsignedInt;
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this->PtrDiffType = TargetInfo::SignedInt;
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this->IntPtrType = TargetInfo::SignedInt;
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this->RegParmMax = 0; // Disallow regparm
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}
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void getArchDefines(const LangOptions &Opts, MacroBuilder &Builder) const;
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void getTargetDefines(const LangOptions &Opts,
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MacroBuilder &Builder) const override {
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getArchDefines(Opts, Builder);
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}
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bool hasFeature(StringRef Feature) const override {
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return Feature == "pnacl";
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}
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ArrayRef<Builtin::Info> getTargetBuiltins() const override { return None; }
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BuiltinVaListKind getBuiltinVaListKind() const override {
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return TargetInfo::PNaClABIBuiltinVaList;
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}
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ArrayRef<const char *> getGCCRegNames() const override;
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ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override;
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bool validateAsmConstraint(const char *&Name,
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TargetInfo::ConstraintInfo &Info) const override {
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return false;
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}
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const char *getClobbers() const override { return ""; }
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bool hasBitIntType() const override { return true; }
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};
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// We attempt to use PNaCl (le32) frontend and Mips32EL backend.
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class LLVM_LIBRARY_VISIBILITY NaClMips32TargetInfo : public MipsTargetInfo {
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public:
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NaClMips32TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
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: MipsTargetInfo(Triple, Opts) {}
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BuiltinVaListKind getBuiltinVaListKind() const override {
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return TargetInfo::PNaClABIBuiltinVaList;
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}
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};
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} // namespace targets
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} // namespace clang
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#endif // LLVM_CLANG_LIB_BASIC_TARGETS_PNACL_H
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