diff options
| author | Stephen Hines <srhines@google.com> | 2019-07-02 16:25:20 -0700 |
|---|---|---|
| committer | Ali B <abittin@gmail.com> | 2019-07-05 19:33:16 +0300 |
| commit | 9afee4e65dc5f9f5eb371683729ff67b8df81d03 (patch) | |
| tree | 4cf241d6c9044f91ee8c06e6920174d06f8de0b6 /clang-r353983e/include/clang/AST/BaseSubobject.h | |
| parent | 2f19bd722c4c825320d1511c1ed83161b7f95d51 (diff) | |
clang 9.0.5 (based on r353983e) from build 5696680.
Bug: http://b/135931688
Bug: http://b/136008926
Test: N/A
Change-Id: I922d17410047d2e2df4625615352c588ee71b203
Diffstat (limited to 'clang-r353983e/include/clang/AST/BaseSubobject.h')
| -rw-r--r-- | clang-r353983e/include/clang/AST/BaseSubobject.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/clang-r353983e/include/clang/AST/BaseSubobject.h b/clang-r353983e/include/clang/AST/BaseSubobject.h new file mode 100644 index 00000000..15600f02 --- /dev/null +++ b/clang-r353983e/include/clang/AST/BaseSubobject.h @@ -0,0 +1,85 @@ +//===- BaseSubobject.h - BaseSubobject class --------------------*- 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 provides a definition of the BaseSubobject class. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_CLANG_AST_BASESUBOBJECT_H +#define LLVM_CLANG_AST_BASESUBOBJECT_H + +#include "clang/AST/CharUnits.h" +#include "clang/AST/DeclCXX.h" +#include "llvm/ADT/DenseMapInfo.h" +#include "llvm/Support/type_traits.h" +#include <cstdint> +#include <utility> + +namespace clang { + +class CXXRecordDecl; + +// BaseSubobject - Uniquely identifies a direct or indirect base class. +// Stores both the base class decl and the offset from the most derived class to +// the base class. Used for vtable and VTT generation. +class BaseSubobject { + /// Base - The base class declaration. + const CXXRecordDecl *Base; + + /// BaseOffset - The offset from the most derived class to the base class. + CharUnits BaseOffset; + +public: + BaseSubobject() = default; + BaseSubobject(const CXXRecordDecl *Base, CharUnits BaseOffset) + : Base(Base), BaseOffset(BaseOffset) {} + + /// getBase - Returns the base class declaration. + const CXXRecordDecl *getBase() const { return Base; } + + /// getBaseOffset - Returns the base class offset. + CharUnits getBaseOffset() const { return BaseOffset; } + + friend bool operator==(const BaseSubobject &LHS, const BaseSubobject &RHS) { + return LHS.Base == RHS.Base && LHS.BaseOffset == RHS.BaseOffset; + } +}; + +} // namespace clang + +namespace llvm { + +template<> struct DenseMapInfo<clang::BaseSubobject> { + static clang::BaseSubobject getEmptyKey() { + return clang::BaseSubobject( + DenseMapInfo<const clang::CXXRecordDecl *>::getEmptyKey(), + clang::CharUnits::fromQuantity(DenseMapInfo<int64_t>::getEmptyKey())); + } + + static clang::BaseSubobject getTombstoneKey() { + return clang::BaseSubobject( + DenseMapInfo<const clang::CXXRecordDecl *>::getTombstoneKey(), + clang::CharUnits::fromQuantity(DenseMapInfo<int64_t>::getTombstoneKey())); + } + + static unsigned getHashValue(const clang::BaseSubobject &Base) { + using PairTy = std::pair<const clang::CXXRecordDecl *, clang::CharUnits>; + + return DenseMapInfo<PairTy>::getHashValue(PairTy(Base.getBase(), + Base.getBaseOffset())); + } + + static bool isEqual(const clang::BaseSubobject &LHS, + const clang::BaseSubobject &RHS) { + return LHS == RHS; + } +}; + +} // namespace llvm + +#endif // LLVM_CLANG_AST_BASESUBOBJECT_H |
