6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
91 lines
3.3 KiB
C++
91 lines
3.3 KiB
C++
//===- BitCodeEnums.h - Core enums for the bitstream format -----*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This header defines "core" bitstream enum values.
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// It has been separated from the other header that defines bitstream enum
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// values, BitCodes.h, to allow tools to track changes to the various
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// bitstream and bitcode enums without needing to fully or partially build
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// LLVM itself.
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//
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// The enum values defined in this file should be considered permanent. If
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// new features are added, they should have values added at the end of the
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// respective lists.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_BITSTREAM_BITCODEENUMS_H
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#define LLVM_BITSTREAM_BITCODEENUMS_H
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namespace llvm {
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/// Offsets of the 32-bit fields of bitstream wrapper header.
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enum BitstreamWrapperHeader : unsigned {
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BWH_MagicField = 0 * 4,
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BWH_VersionField = 1 * 4,
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BWH_OffsetField = 2 * 4,
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BWH_SizeField = 3 * 4,
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BWH_CPUTypeField = 4 * 4,
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BWH_HeaderSize = 5 * 4
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};
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namespace bitc {
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enum StandardWidths {
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BlockIDWidth = 8, // We use VBR-8 for block IDs.
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CodeLenWidth = 4, // Codelen are VBR-4.
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BlockSizeWidth = 32 // BlockSize up to 2^32 32-bit words = 16GB per block.
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};
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// The standard abbrev namespace always has a way to exit a block, enter a
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// nested block, define abbrevs, and define an unabbreviated record.
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enum FixedAbbrevIDs {
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END_BLOCK = 0, // Must be zero to guarantee termination for broken bitcode.
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ENTER_SUBBLOCK = 1,
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/// DEFINE_ABBREV - Defines an abbrev for the current block. It consists
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/// of a vbr5 for # operand infos. Each operand info is emitted with a
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/// single bit to indicate if it is a literal encoding. If so, the value is
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/// emitted with a vbr8. If not, the encoding is emitted as 3 bits followed
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/// by the info value as a vbr5 if needed.
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DEFINE_ABBREV = 2,
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// UNABBREV_RECORDs are emitted with a vbr6 for the record code, followed by
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// a vbr6 for the # operands, followed by vbr6's for each operand.
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UNABBREV_RECORD = 3,
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// This is not a code, this is a marker for the first abbrev assignment.
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FIRST_APPLICATION_ABBREV = 4
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};
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/// StandardBlockIDs - All bitcode files can optionally include a BLOCKINFO
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/// block, which contains metadata about other blocks in the file.
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enum StandardBlockIDs {
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/// BLOCKINFO_BLOCK is used to define metadata about blocks, for example,
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/// standard abbrevs that should be available to all blocks of a specified
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/// ID.
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BLOCKINFO_BLOCK_ID = 0,
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// Block IDs 1-7 are reserved for future expansion.
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FIRST_APPLICATION_BLOCKID = 8
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};
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/// BlockInfoCodes - The blockinfo block contains metadata about user-defined
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/// blocks.
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enum BlockInfoCodes {
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// DEFINE_ABBREV has magic semantics here, applying to the current SETBID'd
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// block, instead of the BlockInfo block.
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BLOCKINFO_CODE_SETBID = 1, // SETBID: [blockid#]
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BLOCKINFO_CODE_BLOCKNAME = 2, // BLOCKNAME: [name]
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BLOCKINFO_CODE_SETRECORDNAME = 3 // BLOCKINFO_CODE_SETRECORDNAME:
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// [id, name]
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};
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} // namespace bitc
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} // namespace llvm
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#endif
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