Speeding up llvm-cov export with multithreaded renderFiles implementation.
Summary:
CoverageExporterJson::renderFiles accounts for most of the execution time given a large profdata file with multiple binaries.
Proposed solution is to generate JSON for each file in parallel and sort at the end to preserve deterministic output. Also added flags to skip generating parts of the output to trim the output size.
Patch by Sajjad Mirza (@sajjadm).
Reviewers: Dor1s, vsk
Reviewed By: Dor1s, vsk
Subscribers: liaoyuke, mgrang, jdoerfert, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D59277
llvm-svn: 356178
diff --git a/llvm/tools/llvm-cov/CodeCoverage.cpp b/llvm/tools/llvm-cov/CodeCoverage.cpp
index 43311a4..f707e3c 100644
--- a/llvm/tools/llvm-cov/CodeCoverage.cpp
+++ b/llvm/tools/llvm-cov/CodeCoverage.cpp
@@ -1006,10 +1006,23 @@
int CodeCoverageTool::doExport(int argc, const char **argv,
CommandLineParserType commandLineParser) {
+ cl::OptionCategory ExportCategory("Exporting options");
+
+ cl::opt<bool> SkipExpansions("skip-expansions", cl::Optional,
+ cl::desc("Don't export expanded source regions"),
+ cl::cat(ExportCategory));
+
+ cl::opt<bool> SkipFunctions("skip-functions", cl::Optional,
+ cl::desc("Don't export per-function data"),
+ cl::cat(ExportCategory));
+
auto Err = commandLineParser(argc, argv);
if (Err)
return Err;
+ ViewOpts.SkipExpansions = SkipExpansions;
+ ViewOpts.SkipFunctions = SkipFunctions;
+
if (ViewOpts.Format != CoverageViewOptions::OutputFormat::Text &&
ViewOpts.Format != CoverageViewOptions::OutputFormat::Lcov) {
error("Coverage data can only be exported as textual JSON or an "