cpp11-migrate: Transforms collect timing data.

Using updated form of newFrontendActionFactory(), Transforms now automatically
measure, if requested, how long it takes to apply a MatchFinder to a source
file. Other per-transform overhead, e.g. applying replacements, is not
currently measured. This behaviour is disabled for now and soon will be
connected to a new command line arg.

llvm-svn: 182942

1 files changed, 16 insertions, 0 deletions

diff --git a/clang-tools-extra/cpp11-migrate/Core/Transform.cpp b/clang-tools-extra/cpp11-migrate/Core/Transform.cpp
index d235356075f..c6bb835321d 100644
--- a/clang-tools-extra/cpp11-migrate/Core/Transform.cpp
+++ b/clang-tools-extra/cpp11-migrate/Core/Transform.cpp
@@ -35,3 +35,19 @@ void collectResults(clang::Rewriter &Rewrite,
     Results[Entry->getName()] = ResultBuf;
   }
 }
+
+bool Transform::handleBeginSource(CompilerInstance &CI, StringRef Filename) {
+  if (!EnableTiming)
+    return true;
+
+  Timings.push_back(std::make_pair(Filename.str(), llvm::TimeRecord()));
+  Timings.back().second -= llvm::TimeRecord::getCurrentTime(true);
+  return true;
+}
+
+void Transform::handleEndSource() {
+  if (!EnableTiming)
+    return;
+
+  Timings.back().second += llvm::TimeRecord::getCurrentTime(false);
+}