| //===- TpiHashing.h ---------------------------------------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_DEBUGINFO_PDB_NATIVE_TPIHASHING_H |
| #define LLVM_DEBUGINFO_PDB_NATIVE_TPIHASHING_H |
| |
| #include "llvm/DebugInfo/CodeView/TypeRecord.h" |
| #include "llvm/Support/Error.h" |
| |
| namespace llvm { |
| namespace pdb { |
| |
| Expected<uint32_t> hashTypeRecord(const llvm::codeview::CVType &Type); |
| |
| struct TagRecordHash { |
| explicit TagRecordHash(codeview::ClassRecord CR, uint32_t Full, |
| uint32_t Forward) |
| : FullRecordHash(Full), ForwardDeclHash(Forward), Class(std::move(CR)) { |
| State = 0; |
| } |
| |
| explicit TagRecordHash(codeview::EnumRecord ER, uint32_t Full, |
| uint32_t Forward) |
| : FullRecordHash(Full), ForwardDeclHash(Forward), Enum(std::move(ER)) { |
| State = 1; |
| } |
| |
| explicit TagRecordHash(codeview::UnionRecord UR, uint32_t Full, |
| uint32_t Forward) |
| : FullRecordHash(Full), ForwardDeclHash(Forward), Union(std::move(UR)) { |
| State = 2; |
| } |
| |
| uint32_t FullRecordHash; |
| uint32_t ForwardDeclHash; |
| |
| codeview::TagRecord &getRecord() { |
| switch (State) { |
| case 0: |
| return Class; |
| case 1: |
| return Enum; |
| case 2: |
| return Union; |
| } |
| llvm_unreachable("unreachable!"); |
| } |
| |
| private: |
| union { |
| codeview::ClassRecord Class; |
| codeview::EnumRecord Enum; |
| codeview::UnionRecord Union; |
| }; |
| |
| uint8_t State = 0; |
| }; |
| |
| /// Given a CVType referring to a class, structure, union, or enum, compute |
| /// the hash of its forward decl and full decl. |
| Expected<TagRecordHash> hashTagRecord(const codeview::CVType &Type); |
| |
| } // end namespace pdb |
| } // end namespace llvm |
| |
| #endif // LLVM_DEBUGINFO_PDB_NATIVE_TPIHASHING_H |