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//===- llvm/Remarks/RemarkStreamer.cpp - Remark Streamer -*- C++ --------*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// This file contains the implementation of the main remark streamer.
#include "llvm/Remarks/RemarkStreamer.h"
#include "llvm/Support/CommandLine.h"
#include <optional>
using namespace llvm;
using namespace llvm::remarks;
static cl::opt<cl::boolOrDefault> EnableRemarksSection(
"Emit a section containing remark diagnostics metadata. By default, "
"this is enabled for the following formats: yaml-strtab, bitstream."),
cl::init(cl::BOU_UNSET), cl::Hidden);
std::unique_ptr<remarks::RemarkSerializer> RemarkSerializer,
std::optional<StringRef> FilenameIn)
: RemarkSerializer(std::move(RemarkSerializer)),
Filename(FilenameIn ? std::optional<std::string>(FilenameIn->str())
: std::nullopt) {}
Error RemarkStreamer::setFilter(StringRef Filter) {
Regex R = Regex(Filter);
std::string RegexError;
if (!R.isValid(RegexError))
return createStringError(std::make_error_code(std::errc::invalid_argument),;
PassFilter = std::move(R);
return Error::success();
bool RemarkStreamer::matchesFilter(StringRef Str) {
if (PassFilter)
return PassFilter->match(Str);
// No filter means all strings pass.
return true;
bool RemarkStreamer::needsSection() const {
if (EnableRemarksSection == cl::BOU_TRUE)
return true;
if (EnableRemarksSection == cl::BOU_FALSE)
return false;
assert(EnableRemarksSection == cl::BOU_UNSET);
// We only need a section if we're in separate mode.
if (RemarkSerializer->Mode != remarks::SerializerMode::Separate)
return false;
// Only some formats need a section:
// * bitstream
// * yaml-strtab
switch (RemarkSerializer->SerializerFormat) {
case remarks::Format::YAMLStrTab:
case remarks::Format::Bitstream:
return true;
return false;