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73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
//===- TpiHashing.h ---------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DEBUGINFO_PDB_TPIHASHING_H
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#define LLVM_DEBUGINFO_PDB_TPIHASHING_H
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#include "llvm/DebugInfo/CodeView/TypeRecord.h"
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#include "llvm/Support/Error.h"
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namespace llvm {
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namespace pdb {
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Expected<uint32_t> hashTypeRecord(const llvm::codeview::CVType &Type);
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struct TagRecordHash {
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explicit TagRecordHash(codeview::ClassRecord CR, uint32_t Full,
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uint32_t Forward)
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: FullRecordHash(Full), ForwardDeclHash(Forward), Class(std::move(CR)) {
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State = 0;
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}
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explicit TagRecordHash(codeview::EnumRecord ER, uint32_t Full,
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uint32_t Forward)
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: FullRecordHash(Full), ForwardDeclHash(Forward), Enum(std::move(ER)) {
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State = 1;
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}
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explicit TagRecordHash(codeview::UnionRecord UR, uint32_t Full,
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uint32_t Forward)
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: FullRecordHash(Full), ForwardDeclHash(Forward), Union(std::move(UR)) {
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State = 2;
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}
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uint32_t FullRecordHash;
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uint32_t ForwardDeclHash;
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codeview::TagRecord &getRecord() {
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switch (State) {
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case 0:
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return Class;
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case 1:
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return Enum;
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case 2:
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return Union;
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}
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llvm_unreachable("unreachable!");
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}
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private:
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union {
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codeview::ClassRecord Class;
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codeview::EnumRecord Enum;
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codeview::UnionRecord Union;
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};
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uint8_t State = 0;
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};
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/// Given a CVType referring to a class, structure, union, or enum, compute
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/// the hash of its forward decl and full decl.
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Expected<TagRecordHash> hashTagRecord(const codeview::CVType &Type);
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} // end namespace pdb
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} // end namespace llvm
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#endif // LLVM_DEBUGINFO_PDB_TPIHASHING_H
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