| //===-- BitstreamRemarkParser.h - Parser for Bitstream remarks --*- 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 the impementation of the Bitstream remark parser. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_REMARKS_BITSTREAM_REMARK_PARSER_H |
| #define LLVM_LIB_REMARKS_BITSTREAM_REMARK_PARSER_H |
| |
| #include "llvm/ADT/Optional.h" |
| #include "llvm/Remarks/BitstreamRemarkContainer.h" |
| #include "llvm/Remarks/BitstreamRemarkParser.h" |
| #include "llvm/Remarks/Remark.h" |
| #include "llvm/Remarks/RemarkFormat.h" |
| #include "llvm/Remarks/RemarkParser.h" |
| #include <cstdint> |
| #include <memory> |
| |
| namespace llvm { |
| namespace remarks { |
| /// Parses and holds the state of the latest parsed remark. |
| struct BitstreamRemarkParser : public RemarkParser { |
| /// The buffer to parse. |
| BitstreamParserHelper ParserHelper; |
| /// The string table used for parsing strings. |
| Optional<ParsedStringTable> StrTab; |
| /// Temporary remark buffer used when the remarks are stored separately. |
| std::unique_ptr<MemoryBuffer> TmpRemarkBuffer; |
| /// The common metadata used to decide how to parse the buffer. |
| /// This is filled when parsing the metadata block. |
| uint64_t ContainerVersion = 0; |
| uint64_t RemarkVersion = 0; |
| BitstreamRemarkContainerType ContainerType = |
| BitstreamRemarkContainerType::Standalone; |
| /// Wether the parser is ready to parse remarks. |
| bool ReadyToParseRemarks = false; |
| |
| /// Create a parser that expects to find a string table embedded in the |
| /// stream. |
| explicit BitstreamRemarkParser(StringRef Buf) |
| : RemarkParser(Format::Bitstream), ParserHelper(Buf) {} |
| |
| /// Create a parser that uses a pre-parsed string table. |
| BitstreamRemarkParser(StringRef Buf, ParsedStringTable StrTab) |
| : RemarkParser(Format::Bitstream), ParserHelper(Buf), |
| StrTab(std::move(StrTab)) {} |
| |
| Expected<std::unique_ptr<Remark>> next() override; |
| |
| static bool classof(const RemarkParser *P) { |
| return P->ParserFormat == Format::Bitstream; |
| } |
| |
| /// Parse and process the metadata of the buffer. |
| Error parseMeta(); |
| |
| /// Parse a Bitstream remark. |
| Expected<std::unique_ptr<Remark>> parseRemark(); |
| |
| private: |
| /// Helper functions. |
| Error processCommonMeta(BitstreamMetaParserHelper &Helper); |
| Error processStandaloneMeta(BitstreamMetaParserHelper &Helper); |
| Error processSeparateRemarksFileMeta(BitstreamMetaParserHelper &Helper); |
| Error processSeparateRemarksMetaMeta(BitstreamMetaParserHelper &Helper); |
| Expected<std::unique_ptr<Remark>> |
| processRemark(BitstreamRemarkParserHelper &Helper); |
| Error processExternalFilePath(Optional<StringRef> ExternalFilePath); |
| }; |
| |
| Expected<std::unique_ptr<BitstreamRemarkParser>> createBitstreamParserFromMeta( |
| StringRef Buf, Optional<ParsedStringTable> StrTab = None, |
| Optional<StringRef> ExternalFilePrependPath = None); |
| |
| } // end namespace remarks |
| } // end namespace llvm |
| |
| #endif /* LLVM_LIB_REMARKS_BITSTREAM_REMARK_PARSER_H */ |