387 lines
14 KiB
C++
387 lines
14 KiB
C++
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//===- BitstreamRemarkSerializer.cpp --------------------------------------===//
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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 file provides the implementation of the LLVM bitstream remark serializer
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// using LLVM's bitstream writer.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Remarks/BitstreamRemarkSerializer.h"
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using namespace llvm;
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using namespace llvm::remarks;
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BitstreamRemarkSerializerHelper::BitstreamRemarkSerializerHelper(
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BitstreamRemarkContainerType ContainerType)
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: Encoded(), R(), Bitstream(Encoded), ContainerType(ContainerType) {}
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static void push(SmallVectorImpl<uint64_t> &R, StringRef Str) {
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for (const char C : Str)
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R.push_back(C);
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}
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static void setRecordName(unsigned RecordID, BitstreamWriter &Bitstream,
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SmallVectorImpl<uint64_t> &R, StringRef Str) {
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R.clear();
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R.push_back(RecordID);
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push(R, Str);
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Bitstream.EmitRecord(bitc::BLOCKINFO_CODE_SETRECORDNAME, R);
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}
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static void initBlock(unsigned BlockID, BitstreamWriter &Bitstream,
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SmallVectorImpl<uint64_t> &R, StringRef Str) {
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R.clear();
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R.push_back(BlockID);
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Bitstream.EmitRecord(bitc::BLOCKINFO_CODE_SETBID, R);
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R.clear();
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push(R, Str);
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Bitstream.EmitRecord(bitc::BLOCKINFO_CODE_BLOCKNAME, R);
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}
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void BitstreamRemarkSerializerHelper::setupMetaBlockInfo() {
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// Setup the metadata block.
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initBlock(META_BLOCK_ID, Bitstream, R, MetaBlockName);
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// The container information.
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setRecordName(RECORD_META_CONTAINER_INFO, Bitstream, R,
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MetaContainerInfoName);
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auto Abbrev = std::make_shared<BitCodeAbbrev>();
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Abbrev->Add(BitCodeAbbrevOp(RECORD_META_CONTAINER_INFO));
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // Version.
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // Type.
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RecordMetaContainerInfoAbbrevID =
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Bitstream.EmitBlockInfoAbbrev(META_BLOCK_ID, Abbrev);
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}
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void BitstreamRemarkSerializerHelper::setupMetaRemarkVersion() {
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setRecordName(RECORD_META_REMARK_VERSION, Bitstream, R,
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MetaRemarkVersionName);
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auto Abbrev = std::make_shared<BitCodeAbbrev>();
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Abbrev->Add(BitCodeAbbrevOp(RECORD_META_REMARK_VERSION));
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // Version.
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RecordMetaRemarkVersionAbbrevID =
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Bitstream.EmitBlockInfoAbbrev(META_BLOCK_ID, Abbrev);
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}
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void BitstreamRemarkSerializerHelper::emitMetaRemarkVersion(
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uint64_t RemarkVersion) {
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// The remark version is emitted only if we emit remarks.
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R.clear();
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R.push_back(RECORD_META_REMARK_VERSION);
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R.push_back(RemarkVersion);
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Bitstream.EmitRecordWithAbbrev(RecordMetaRemarkVersionAbbrevID, R);
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}
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void BitstreamRemarkSerializerHelper::setupMetaStrTab() {
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setRecordName(RECORD_META_STRTAB, Bitstream, R, MetaStrTabName);
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auto Abbrev = std::make_shared<BitCodeAbbrev>();
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Abbrev->Add(BitCodeAbbrevOp(RECORD_META_STRTAB));
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Raw table.
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RecordMetaStrTabAbbrevID =
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Bitstream.EmitBlockInfoAbbrev(META_BLOCK_ID, Abbrev);
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}
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void BitstreamRemarkSerializerHelper::emitMetaStrTab(
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const StringTable &StrTab) {
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// The string table is not emitted if we emit remarks separately.
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R.clear();
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R.push_back(RECORD_META_STRTAB);
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// Serialize to a blob.
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std::string Buf;
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raw_string_ostream OS(Buf);
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StrTab.serialize(OS);
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StringRef Blob = OS.str();
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Bitstream.EmitRecordWithBlob(RecordMetaStrTabAbbrevID, R, Blob);
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}
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void BitstreamRemarkSerializerHelper::setupMetaExternalFile() {
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setRecordName(RECORD_META_EXTERNAL_FILE, Bitstream, R, MetaExternalFileName);
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auto Abbrev = std::make_shared<BitCodeAbbrev>();
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Abbrev->Add(BitCodeAbbrevOp(RECORD_META_EXTERNAL_FILE));
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Filename.
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RecordMetaExternalFileAbbrevID =
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Bitstream.EmitBlockInfoAbbrev(META_BLOCK_ID, Abbrev);
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}
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void BitstreamRemarkSerializerHelper::emitMetaExternalFile(StringRef Filename) {
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// The external file is emitted only if we emit the separate metadata.
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R.clear();
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R.push_back(RECORD_META_EXTERNAL_FILE);
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Bitstream.EmitRecordWithBlob(RecordMetaExternalFileAbbrevID, R, Filename);
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}
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void BitstreamRemarkSerializerHelper::setupRemarkBlockInfo() {
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// Setup the remark block.
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initBlock(REMARK_BLOCK_ID, Bitstream, R, RemarkBlockName);
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// The header of a remark.
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{
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setRecordName(RECORD_REMARK_HEADER, Bitstream, R, RemarkHeaderName);
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auto Abbrev = std::make_shared<BitCodeAbbrev>();
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Abbrev->Add(BitCodeAbbrevOp(RECORD_REMARK_HEADER));
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); // Type
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Remark Name
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Pass name
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Function name
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RecordRemarkHeaderAbbrevID =
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Bitstream.EmitBlockInfoAbbrev(REMARK_BLOCK_ID, Abbrev);
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}
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// The location of a remark.
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{
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setRecordName(RECORD_REMARK_DEBUG_LOC, Bitstream, R, RemarkDebugLocName);
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auto Abbrev = std::make_shared<BitCodeAbbrev>();
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Abbrev->Add(BitCodeAbbrevOp(RECORD_REMARK_DEBUG_LOC));
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 7)); // File
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // Line
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // Column
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RecordRemarkDebugLocAbbrevID =
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Bitstream.EmitBlockInfoAbbrev(REMARK_BLOCK_ID, Abbrev);
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}
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// The hotness of a remark.
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{
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setRecordName(RECORD_REMARK_HOTNESS, Bitstream, R, RemarkHotnessName);
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auto Abbrev = std::make_shared<BitCodeAbbrev>();
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Abbrev->Add(BitCodeAbbrevOp(RECORD_REMARK_HOTNESS));
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Hotness
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RecordRemarkHotnessAbbrevID =
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Bitstream.EmitBlockInfoAbbrev(REMARK_BLOCK_ID, Abbrev);
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}
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// An argument entry with a debug location attached.
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{
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setRecordName(RECORD_REMARK_ARG_WITH_DEBUGLOC, Bitstream, R,
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RemarkArgWithDebugLocName);
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auto Abbrev = std::make_shared<BitCodeAbbrev>();
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Abbrev->Add(BitCodeAbbrevOp(RECORD_REMARK_ARG_WITH_DEBUGLOC));
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 7)); // Key
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 7)); // Value
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 7)); // File
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // Line
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // Column
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RecordRemarkArgWithDebugLocAbbrevID =
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Bitstream.EmitBlockInfoAbbrev(REMARK_BLOCK_ID, Abbrev);
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}
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// An argument entry with no debug location attached.
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{
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setRecordName(RECORD_REMARK_ARG_WITHOUT_DEBUGLOC, Bitstream, R,
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RemarkArgWithoutDebugLocName);
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auto Abbrev = std::make_shared<BitCodeAbbrev>();
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Abbrev->Add(BitCodeAbbrevOp(RECORD_REMARK_ARG_WITHOUT_DEBUGLOC));
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 7)); // Key
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Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 7)); // Value
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RecordRemarkArgWithoutDebugLocAbbrevID =
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Bitstream.EmitBlockInfoAbbrev(REMARK_BLOCK_ID, Abbrev);
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}
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}
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void BitstreamRemarkSerializerHelper::setupBlockInfo() {
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// Emit magic number.
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for (const char C : ContainerMagic)
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Bitstream.Emit(static_cast<unsigned>(C), 8);
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Bitstream.EnterBlockInfoBlock();
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// Setup the main metadata. Depending on the container type, we'll setup the
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// required records next.
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setupMetaBlockInfo();
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switch (ContainerType) {
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case BitstreamRemarkContainerType::SeparateRemarksMeta:
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// Needs a string table that the separate remark file is using.
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setupMetaStrTab();
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// Needs to know where the external remarks file is.
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setupMetaExternalFile();
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break;
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case BitstreamRemarkContainerType::SeparateRemarksFile:
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// Contains remarks: emit the version.
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setupMetaRemarkVersion();
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// Contains remarks: emit the remark abbrevs.
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setupRemarkBlockInfo();
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break;
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case BitstreamRemarkContainerType::Standalone:
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// Contains remarks: emit the version.
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setupMetaRemarkVersion();
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// Needs a string table.
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setupMetaStrTab();
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// Contains remarks: emit the remark abbrevs.
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setupRemarkBlockInfo();
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break;
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}
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Bitstream.ExitBlock();
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}
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void BitstreamRemarkSerializerHelper::emitMetaBlock(
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uint64_t ContainerVersion, Optional<uint64_t> RemarkVersion,
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Optional<const StringTable *> StrTab, Optional<StringRef> Filename) {
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// Emit the meta block
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Bitstream.EnterSubblock(META_BLOCK_ID, 3);
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// The container version and type.
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R.clear();
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R.push_back(RECORD_META_CONTAINER_INFO);
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R.push_back(ContainerVersion);
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R.push_back(static_cast<uint64_t>(ContainerType));
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Bitstream.EmitRecordWithAbbrev(RecordMetaContainerInfoAbbrevID, R);
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switch (ContainerType) {
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case BitstreamRemarkContainerType::SeparateRemarksMeta:
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assert(StrTab != None && *StrTab != nullptr);
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emitMetaStrTab(**StrTab);
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assert(Filename != None);
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emitMetaExternalFile(*Filename);
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break;
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case BitstreamRemarkContainerType::SeparateRemarksFile:
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assert(RemarkVersion != None);
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emitMetaRemarkVersion(*RemarkVersion);
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break;
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case BitstreamRemarkContainerType::Standalone:
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assert(RemarkVersion != None);
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emitMetaRemarkVersion(*RemarkVersion);
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assert(StrTab != None && *StrTab != nullptr);
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emitMetaStrTab(**StrTab);
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break;
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}
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Bitstream.ExitBlock();
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}
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void BitstreamRemarkSerializerHelper::emitRemarkBlock(const Remark &Remark,
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StringTable &StrTab) {
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Bitstream.EnterSubblock(REMARK_BLOCK_ID, 4);
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R.clear();
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R.push_back(RECORD_REMARK_HEADER);
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R.push_back(static_cast<uint64_t>(Remark.RemarkType));
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R.push_back(StrTab.add(Remark.RemarkName).first);
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R.push_back(StrTab.add(Remark.PassName).first);
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R.push_back(StrTab.add(Remark.FunctionName).first);
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Bitstream.EmitRecordWithAbbrev(RecordRemarkHeaderAbbrevID, R);
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if (const Optional<RemarkLocation> &Loc = Remark.Loc) {
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R.clear();
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R.push_back(RECORD_REMARK_DEBUG_LOC);
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R.push_back(StrTab.add(Loc->SourceFilePath).first);
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R.push_back(Loc->SourceLine);
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R.push_back(Loc->SourceColumn);
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Bitstream.EmitRecordWithAbbrev(RecordRemarkDebugLocAbbrevID, R);
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}
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if (Optional<uint64_t> Hotness = Remark.Hotness) {
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R.clear();
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R.push_back(RECORD_REMARK_HOTNESS);
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R.push_back(*Hotness);
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Bitstream.EmitRecordWithAbbrev(RecordRemarkHotnessAbbrevID, R);
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}
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for (const Argument &Arg : Remark.Args) {
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R.clear();
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unsigned Key = StrTab.add(Arg.Key).first;
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unsigned Val = StrTab.add(Arg.Val).first;
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bool HasDebugLoc = Arg.Loc != None;
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R.push_back(HasDebugLoc ? RECORD_REMARK_ARG_WITH_DEBUGLOC
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: RECORD_REMARK_ARG_WITHOUT_DEBUGLOC);
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R.push_back(Key);
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R.push_back(Val);
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if (HasDebugLoc) {
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R.push_back(StrTab.add(Arg.Loc->SourceFilePath).first);
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R.push_back(Arg.Loc->SourceLine);
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R.push_back(Arg.Loc->SourceColumn);
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}
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Bitstream.EmitRecordWithAbbrev(HasDebugLoc
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? RecordRemarkArgWithDebugLocAbbrevID
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: RecordRemarkArgWithoutDebugLocAbbrevID,
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R);
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}
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Bitstream.ExitBlock();
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}
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void BitstreamRemarkSerializerHelper::flushToStream(raw_ostream &OS) {
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OS.write(Encoded.data(), Encoded.size());
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Encoded.clear();
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}
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StringRef BitstreamRemarkSerializerHelper::getBuffer() {
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return StringRef(Encoded.data(), Encoded.size());
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}
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BitstreamRemarkSerializer::BitstreamRemarkSerializer(raw_ostream &OS,
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SerializerMode Mode)
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: RemarkSerializer(Format::Bitstream, OS, Mode),
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Helper(BitstreamRemarkContainerType::SeparateRemarksFile) {
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assert(Mode == SerializerMode::Separate &&
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"For SerializerMode::Standalone, a pre-filled string table needs to "
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"be provided.");
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// We always use a string table with bitstream.
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StrTab.emplace();
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}
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BitstreamRemarkSerializer::BitstreamRemarkSerializer(raw_ostream &OS,
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SerializerMode Mode,
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StringTable StrTabIn)
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: RemarkSerializer(Format::Bitstream, OS, Mode),
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Helper(Mode == SerializerMode::Separate
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|
? BitstreamRemarkContainerType::SeparateRemarksFile
|
||
|
|
: BitstreamRemarkContainerType::Standalone) {
|
||
|
|
StrTab = std::move(StrTabIn);
|
||
|
|
}
|
||
|
|
|
||
|
|
void BitstreamRemarkSerializer::emit(const Remark &Remark) {
|
||
|
|
if (!DidSetUp) {
|
||
|
|
// Emit the metadata that is embedded in the remark file.
|
||
|
|
// If we're in standalone mode, serialize the string table as well.
|
||
|
|
bool IsStandalone =
|
||
|
|
Helper.ContainerType == BitstreamRemarkContainerType::Standalone;
|
||
|
|
BitstreamMetaSerializer MetaSerializer(
|
||
|
|
OS, Helper,
|
||
|
|
IsStandalone ? &*StrTab : Optional<const StringTable *>(None));
|
||
|
|
MetaSerializer.emit();
|
||
|
|
DidSetUp = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
assert(DidSetUp &&
|
||
|
|
"The Block info block and the meta block were not emitted yet.");
|
||
|
|
Helper.emitRemarkBlock(Remark, *StrTab);
|
||
|
|
|
||
|
|
Helper.flushToStream(OS);
|
||
|
|
}
|
||
|
|
|
||
|
|
std::unique_ptr<MetaSerializer> BitstreamRemarkSerializer::metaSerializer(
|
||
|
|
raw_ostream &OS, Optional<StringRef> ExternalFilename) {
|
||
|
|
assert(Helper.ContainerType !=
|
||
|
|
BitstreamRemarkContainerType::SeparateRemarksMeta);
|
||
|
|
bool IsStandalone =
|
||
|
|
Helper.ContainerType == BitstreamRemarkContainerType::Standalone;
|
||
|
|
return std::make_unique<BitstreamMetaSerializer>(
|
||
|
|
OS,
|
||
|
|
IsStandalone ? BitstreamRemarkContainerType::Standalone
|
||
|
|
: BitstreamRemarkContainerType::SeparateRemarksMeta,
|
||
|
|
&*StrTab, ExternalFilename);
|
||
|
|
}
|
||
|
|
|
||
|
|
void BitstreamMetaSerializer::emit() {
|
||
|
|
Helper->setupBlockInfo();
|
||
|
|
Helper->emitMetaBlock(CurrentContainerVersion, CurrentRemarkVersion, StrTab,
|
||
|
|
ExternalFilename);
|
||
|
|
Helper->flushToStream(OS);
|
||
|
|
}
|