From d880de2d19d46f7cfea7aa593602458440bc1e8d Mon Sep 17 00:00:00 2001 From: Anton Afanasyev Date: Sat, 30 Mar 2019 08:42:48 +0000 Subject: Adds `-ftime-trace` option to clang that produces Chrome `chrome://tracing` compatible JSON profiling output dumps. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This change adds hierarchical "time trace" profiling blocks that can be visualized in Chrome, in a "flame chart" style. Each profiling block can have a "detail" string that for example indicates the file being processed, template name being instantiated, function being optimized etc. This is taken from GitHub PR: https://github.com/aras-p/llvm-project-20170507/pull/2 Patch by Aras Pranckevičius. Differential Revision: https://reviews.llvm.org/D58675 llvm-svn: 357340 --- clang/lib/CodeGen/BackendUtil.cpp | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'clang/lib/CodeGen/BackendUtil.cpp') diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp index 540cc6f6bc5..e22a62d3777 100644 --- a/clang/lib/CodeGen/BackendUtil.cpp +++ b/clang/lib/CodeGen/BackendUtil.cpp @@ -42,6 +42,7 @@ #include "llvm/Support/MemoryBuffer.h" #include "llvm/Support/PrettyStackTrace.h" #include "llvm/Support/TargetRegistry.h" +#include "llvm/Support/TimeProfiler.h" #include "llvm/Support/Timer.h" #include "llvm/Support/raw_ostream.h" #include "llvm/Target/TargetMachine.h" @@ -1382,6 +1383,9 @@ void clang::EmitBackendOutput(DiagnosticsEngine &Diags, const llvm::DataLayout &TDesc, Module *M, BackendAction Action, std::unique_ptr OS) { + + llvm::TimeTraceScope TimeScope("Backend", StringRef("")); + std::unique_ptr EmptyModule; if (!CGOpts.ThinLTOIndexFile.empty()) { // If we are performing a ThinLTO importing compile, load the function index -- cgit v1.2.3