6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
//===- BaseSubobject.h - BaseSubobject class --------------------*- 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 provides a definition of the BaseSubobject class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_AST_BASESUBOBJECT_H
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#define LLVM_CLANG_AST_BASESUBOBJECT_H
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#include "clang/AST/CharUnits.h"
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#include "clang/AST/DeclCXX.h"
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#include "llvm/ADT/DenseMapInfo.h"
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#include "llvm/Support/type_traits.h"
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#include <cstdint>
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#include <utility>
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namespace clang {
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class CXXRecordDecl;
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// BaseSubobject - Uniquely identifies a direct or indirect base class.
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// Stores both the base class decl and the offset from the most derived class to
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// the base class. Used for vtable and VTT generation.
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class BaseSubobject {
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/// Base - The base class declaration.
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const CXXRecordDecl *Base;
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/// BaseOffset - The offset from the most derived class to the base class.
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CharUnits BaseOffset;
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public:
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BaseSubobject() = default;
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BaseSubobject(const CXXRecordDecl *Base, CharUnits BaseOffset)
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: Base(Base), BaseOffset(BaseOffset) {}
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/// getBase - Returns the base class declaration.
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const CXXRecordDecl *getBase() const { return Base; }
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/// getBaseOffset - Returns the base class offset.
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CharUnits getBaseOffset() const { return BaseOffset; }
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friend bool operator==(const BaseSubobject &LHS, const BaseSubobject &RHS) {
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return LHS.Base == RHS.Base && LHS.BaseOffset == RHS.BaseOffset;
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}
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};
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} // namespace clang
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namespace llvm {
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template<> struct DenseMapInfo<clang::BaseSubobject> {
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static clang::BaseSubobject getEmptyKey() {
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return clang::BaseSubobject(
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DenseMapInfo<const clang::CXXRecordDecl *>::getEmptyKey(),
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clang::CharUnits::fromQuantity(DenseMapInfo<int64_t>::getEmptyKey()));
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}
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static clang::BaseSubobject getTombstoneKey() {
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return clang::BaseSubobject(
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DenseMapInfo<const clang::CXXRecordDecl *>::getTombstoneKey(),
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clang::CharUnits::fromQuantity(DenseMapInfo<int64_t>::getTombstoneKey()));
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}
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static unsigned getHashValue(const clang::BaseSubobject &Base) {
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using PairTy = std::pair<const clang::CXXRecordDecl *, clang::CharUnits>;
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return DenseMapInfo<PairTy>::getHashValue(PairTy(Base.getBase(),
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Base.getBaseOffset()));
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}
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static bool isEqual(const clang::BaseSubobject &LHS,
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const clang::BaseSubobject &RHS) {
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return LHS == RHS;
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}
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};
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} // namespace llvm
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#endif // LLVM_CLANG_AST_BASESUBOBJECT_H
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