mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 18:54:02 +01:00
117 lines
4.2 KiB
C++
117 lines
4.2 KiB
C++
//===-- BitstreamRemarkParser.h - Bitstream parser --------------*- 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 an implementation of the remark parser using the LLVM
|
|
// Bitstream format.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_REMARKS_BITSTREAMREMARKPARSER_H
|
|
#define LLVM_REMARKS_BITSTREAMREMARKPARSER_H
|
|
|
|
#include "llvm/ADT/ArrayRef.h"
|
|
#include "llvm/ADT/Optional.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/Bitstream/BitstreamReader.h"
|
|
#include "llvm/Support/Error.h"
|
|
#include <array>
|
|
#include <cstdint>
|
|
|
|
namespace llvm {
|
|
namespace remarks {
|
|
|
|
/// Helper to parse a META_BLOCK for a bitstream remark container.
|
|
struct BitstreamMetaParserHelper {
|
|
/// The Bitstream reader.
|
|
BitstreamCursor &Stream;
|
|
/// Reference to the storage for the block info.
|
|
BitstreamBlockInfo &BlockInfo;
|
|
/// The parsed content: depending on the container type, some fields might be
|
|
/// empty.
|
|
Optional<uint64_t> ContainerVersion;
|
|
Optional<uint8_t> ContainerType;
|
|
Optional<StringRef> StrTabBuf;
|
|
Optional<StringRef> ExternalFilePath;
|
|
Optional<uint64_t> RemarkVersion;
|
|
|
|
/// Continue parsing with \p Stream. \p Stream is expected to contain a
|
|
/// ENTER_SUBBLOCK to the META_BLOCK at the current position.
|
|
/// \p Stream is expected to have a BLOCKINFO_BLOCK set.
|
|
BitstreamMetaParserHelper(BitstreamCursor &Stream,
|
|
BitstreamBlockInfo &BlockInfo);
|
|
|
|
/// Parse the META_BLOCK and fill the available entries.
|
|
/// This helper does not check for the validity of the fields.
|
|
Error parse();
|
|
};
|
|
|
|
/// Helper to parse a REMARK_BLOCK for a bitstream remark container.
|
|
struct BitstreamRemarkParserHelper {
|
|
/// The Bitstream reader.
|
|
BitstreamCursor &Stream;
|
|
/// The parsed content: depending on the remark, some fields might be empty.
|
|
Optional<uint8_t> Type;
|
|
Optional<uint64_t> RemarkNameIdx;
|
|
Optional<uint64_t> PassNameIdx;
|
|
Optional<uint64_t> FunctionNameIdx;
|
|
Optional<uint64_t> SourceFileNameIdx;
|
|
Optional<uint32_t> SourceLine;
|
|
Optional<uint32_t> SourceColumn;
|
|
Optional<uint64_t> Hotness;
|
|
struct Argument {
|
|
Optional<uint64_t> KeyIdx;
|
|
Optional<uint64_t> ValueIdx;
|
|
Optional<uint64_t> SourceFileNameIdx;
|
|
Optional<uint32_t> SourceLine;
|
|
Optional<uint32_t> SourceColumn;
|
|
};
|
|
Optional<ArrayRef<Argument>> Args;
|
|
/// Avoid re-allocating a vector every time.
|
|
SmallVector<Argument, 8> TmpArgs;
|
|
|
|
/// Continue parsing with \p Stream. \p Stream is expected to contain a
|
|
/// ENTER_SUBBLOCK to the REMARK_BLOCK at the current position.
|
|
/// \p Stream is expected to have a BLOCKINFO_BLOCK set and to have already
|
|
/// parsed the META_BLOCK.
|
|
BitstreamRemarkParserHelper(BitstreamCursor &Stream);
|
|
|
|
/// Parse the REMARK_BLOCK and fill the available entries.
|
|
/// This helper does not check for the validity of the fields.
|
|
Error parse();
|
|
};
|
|
|
|
/// Helper to parse any bitstream remark container.
|
|
struct BitstreamParserHelper {
|
|
/// The Bitstream reader.
|
|
BitstreamCursor Stream;
|
|
/// The block info block.
|
|
BitstreamBlockInfo BlockInfo;
|
|
/// Start parsing at \p Buffer.
|
|
BitstreamParserHelper(StringRef Buffer);
|
|
/// Parse the magic number.
|
|
Expected<std::array<char, 4>> parseMagic();
|
|
/// Parse the block info block containing all the abbrevs.
|
|
/// This needs to be called before calling any other parsing function.
|
|
Error parseBlockInfoBlock();
|
|
/// Return true if the next block is a META_BLOCK. This function does not move
|
|
/// the cursor.
|
|
Expected<bool> isMetaBlock();
|
|
/// Return true if the next block is a REMARK_BLOCK. This function does not
|
|
/// move the cursor.
|
|
Expected<bool> isRemarkBlock();
|
|
/// Return true if the parser reached the end of the stream.
|
|
bool atEndOfStream() { return Stream.AtEndOfStream(); }
|
|
/// Jump to the end of the stream, skipping everything.
|
|
void skipToEnd() { return Stream.skipToEnd(); }
|
|
};
|
|
|
|
} // end namespace remarks
|
|
} // end namespace llvm
|
|
|
|
#endif // LLVM_REMARKS_BITSTREAMREMARKPARSER_H
|