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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===- TpiHashing.h ---------------------------------------------*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |||
| 9 | #ifndef LLVM_DEBUGINFO_PDB_NATIVE_TPIHASHING_H |
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| 10 | #define LLVM_DEBUGINFO_PDB_NATIVE_TPIHASHING_H |
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| 11 | |||
| 12 | #include "llvm/DebugInfo/CodeView/TypeRecord.h" |
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| 13 | #include "llvm/Support/Error.h" |
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| 14 | |||
| 15 | namespace llvm { |
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| 16 | namespace pdb { |
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| 17 | |||
| 18 | Expected<uint32_t> hashTypeRecord(const llvm::codeview::CVType &Type); |
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| 19 | |||
| 20 | struct TagRecordHash { |
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| 21 | explicit TagRecordHash(codeview::ClassRecord CR, uint32_t Full, |
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| 22 | uint32_t Forward) |
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| 23 | : FullRecordHash(Full), ForwardDeclHash(Forward), Class(std::move(CR)) { |
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| 24 | State = 0; |
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| 25 | } |
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| 26 | |||
| 27 | explicit TagRecordHash(codeview::EnumRecord ER, uint32_t Full, |
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| 28 | uint32_t Forward) |
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| 29 | : FullRecordHash(Full), ForwardDeclHash(Forward), Enum(std::move(ER)) { |
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| 30 | State = 1; |
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| 31 | } |
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| 32 | |||
| 33 | explicit TagRecordHash(codeview::UnionRecord UR, uint32_t Full, |
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| 34 | uint32_t Forward) |
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| 35 | : FullRecordHash(Full), ForwardDeclHash(Forward), Union(std::move(UR)) { |
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| 36 | State = 2; |
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| 37 | } |
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| 38 | |||
| 39 | uint32_t FullRecordHash; |
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| 40 | uint32_t ForwardDeclHash; |
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| 41 | |||
| 42 | codeview::TagRecord &getRecord() { |
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| 43 | switch (State) { |
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| 44 | case 0: |
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| 45 | return Class; |
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| 46 | case 1: |
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| 47 | return Enum; |
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| 48 | case 2: |
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| 49 | return Union; |
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| 50 | } |
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| 51 | llvm_unreachable("unreachable!"); |
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| 52 | } |
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| 53 | |||
| 54 | private: |
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| 55 | union { |
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| 56 | codeview::ClassRecord Class; |
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| 57 | codeview::EnumRecord Enum; |
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| 58 | codeview::UnionRecord Union; |
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| 59 | }; |
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| 60 | |||
| 61 | uint8_t State = 0; |
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| 62 | }; |
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| 63 | |||
| 64 | /// Given a CVType referring to a class, structure, union, or enum, compute |
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| 65 | /// the hash of its forward decl and full decl. |
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| 66 | Expected<TagRecordHash> hashTagRecord(const codeview::CVType &Type); |
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| 67 | |||
| 68 | } // end namespace pdb |
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| 69 | } // end namespace llvm |
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| 70 | |||
| 71 | #endif // LLVM_DEBUGINFO_PDB_NATIVE_TPIHASHING_H |