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//===- RemarkStringTable.cpp ----------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Implementation of the Remark string table used at remark generation.
//
//===----------------------------------------------------------------------===//
#include "llvm/Remarks/RemarkStringTable.h"
#include "llvm/Support/EndianStream.h"
#include "llvm/Support/Error.h"
#include <vector>
using namespace llvm;
using namespace llvm::remarks;
std::pair<unsigned, StringRef> StringTable::add(StringRef Str) {
size_t NextID = StrTab.size();
auto KV = StrTab.insert({Str, NextID});
// If it's a new string, add it to the final size.
if (KV.second)
SerializedSize += KV.first->first().size() + 1; // +1 for the '\0'
// Can be either NextID or the previous ID if the string is already there.
return {KV.first->second, KV.first->first()};
}
void StringTable::serialize(raw_ostream &OS) const {
// Emit the number of strings.
uint64_t StrTabSize = SerializedSize;
support::endian::write(OS, StrTabSize, support::little);
// Emit the sequence of strings.
for (StringRef Str : serialize()) {
OS << Str;
// Explicitly emit a '\0'.
OS.write('\0');
}
}
std::vector<StringRef> StringTable::serialize() const {
std::vector<StringRef> Strings{StrTab.size()};
for (const auto &KV : StrTab)
Strings[KV.second] = KV.first();
return Strings;
}
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