Widen the intake valve for TurboFan.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 72f2093328facd81a8f93f2d098c781d341b4da6..1bd87b3befbf4c2e6b5711d21fdcf98a13d30720 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -151,6 +151,17 @@ static void TraceSchedule(Schedule* schedule) {
 
 
 Handle<Code> Pipeline::GenerateCode() {
+  if (info()->function()->dont_optimize_reason() == kTryCatchStatement ||
+      info()->function()->dont_optimize_reason() == kTryFinallyStatement ||
+      // TODO(turbofan): Make ES6 for-of work and remove this bailout.
+      info()->function()->dont_optimize_reason() == kForOfStatement ||
+      // TODO(turbofan): Make super work and remove this bailout.
+      info()->function()->dont_optimize_reason() == kSuperReference ||
+      // TODO(turbofan): Make OSR work and remove this bailout.
+      info()->is_osr()) {
+    return Handle<Code>::null();
+  }
+
   if (FLAG_turbo_stats) isolate()->GetTStatistics()->Initialize(info_);
 
   if (FLAG_trace_turbo) {