1//===- TpiHashing.h ---------------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLVM_DEBUGINFO_PDB_NATIVE_TPIHASHING_H
10#define LLVM_DEBUGINFO_PDB_NATIVE_TPIHASHING_H
11
12#include "llvm/DebugInfo/CodeView/TypeRecord.h"
13#include "llvm/Support/Error.h"
14
15namespace llvm {
16namespace pdb {
17
18Expected<uint32_t> hashTypeRecord(const llvm::codeview::CVType &Type);
19
20struct TagRecordHash {
21 explicit TagRecordHash(codeview::ClassRecord CR, uint32_t Full,
22 uint32_t Forward)
23 : FullRecordHash(Full), ForwardDeclHash(Forward), Class(std::move(CR)) {
24 State = 0;
25 }
26
27 explicit TagRecordHash(codeview::EnumRecord ER, uint32_t Full,
28 uint32_t Forward)
29 : FullRecordHash(Full), ForwardDeclHash(Forward), Enum(std::move(ER)) {
30 State = 1;
31 }
32
33 explicit TagRecordHash(codeview::UnionRecord UR, uint32_t Full,
34 uint32_t Forward)
35 : FullRecordHash(Full), ForwardDeclHash(Forward), Union(std::move(UR)) {
36 State = 2;
37 }
38
39 uint32_t FullRecordHash;
40 uint32_t ForwardDeclHash;
41
42 codeview::TagRecord &getRecord() {
43 switch (State) {
44 case 0:
45 return Class;
46 case 1:
47 return Enum;
48 case 2:
49 return Union;
50 }
51 llvm_unreachable("unreachable!");
52 }
53
54private:
55 union {
56 codeview::ClassRecord Class;
57 codeview::EnumRecord Enum;
58 codeview::UnionRecord Union;
59 };
60
61 uint8_t State = 0;
62};
63
64/// Given a CVType referring to a class, structure, union, or enum, compute
65/// the hash of its forward decl and full decl.
66Expected<TagRecordHash> hashTagRecord(const codeview::CVType &Type);
67
68} // end namespace pdb
69} // end namespace llvm
70
71#endif // LLVM_DEBUGINFO_PDB_NATIVE_TPIHASHING_H
72

source code of llvm/include/llvm/DebugInfo/PDB/Native/TpiHashing.h