[PATCH] D61914: [Support][Test] Time profiler: add regression test

[Anton Afanasyev via Phabricator via cfe-commits]

anton-afanasyev created this revision.
anton-afanasyev added a reviewer: thakis.
Herald added projects: clang, LLVM.
Herald added subscribers: llvm-commits, cfe-commits.

Add output to `llvm::errs()` when `-ftime-trace` option is enabled,
add regression test checking this option works as expected.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D61914

Files:
  clang/tools/driver/cc1_main.cpp
  llvm/test/Support/check-time-trace.cxx


Index: llvm/test/Support/check-time-trace.cxx
===================================================================
--- /dev/null
+++ llvm/test/Support/check-time-trace.cxx
@@ -0,0 +1,11 @@
+// RUN: clang++ -ftime-trace %s 2>&1 | grep "Time trace json-file dumped to" \
+// RUN:   | awk '{print $NF}' | xargs cat | FileCheck %s
+
+// CHECK: "args":{"name":"clang"}
+
+#include <iostream>
+
+int main() {
+  std::cout << "Foo" << std::endl;
+  return 0;
+}
Index: clang/tools/driver/cc1_main.cpp
===================================================================
--- clang/tools/driver/cc1_main.cpp
+++ clang/tools/driver/cc1_main.cpp
@@ -241,6 +241,11 @@
 
     llvm::timeTraceProfilerWrite(*profilerOutput);
     llvm::timeTraceProfilerCleanup();
+
+    llvm::errs() << "Time trace json-file dumped to " << Path.str() << "\n";
+    llvm::errs()
+        << "Use chrome://tracing or Speedscope App "
+           "(https://www.speedscope.app) for flamegraph visualization\n";
   }
 
   // Our error handler depends on the Diagnostics object, which we're


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