Re-optimize faster after making a pretenuring decision.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 259a55f8996291a08c01de32a9444196aa1d6514..6722c784a97946af5bb1d63c7e49a8bfbcd21d4e 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -1556,7 +1556,8 @@ inline bool AllocationSite::DigestPretenuringFeedback() {
       decision_changed = true;
       dependent_code()->MarkCodeForDeoptimization(
           GetIsolate(),
-          DependentCode::kAllocationSiteTenuringChangedGroup);
+          DependentCode::kAllocationSiteTenuringChangedGroup,
+          true);
     }
   }
 
@@ -4455,6 +4456,21 @@ void Code::set_marked_for_deoptimization(bool flag) {
 }
 
 
+bool Code::marked_for_reoptimization() {
+  ASSERT(kind() == OPTIMIZED_FUNCTION);
+  return MarkedForReoptimizationField::decode(
+      READ_UINT32_FIELD(this, kKindSpecificFlags1Offset));
+}
+
+
+void Code::set_marked_for_reoptimization(bool flag) {
+  ASSERT(kind() == OPTIMIZED_FUNCTION);
+  int previous = READ_UINT32_FIELD(this, kKindSpecificFlags1Offset);
+  int updated = MarkedForReoptimizationField::update(previous, flag);
+  WRITE_UINT32_FIELD(this, kKindSpecificFlags1Offset, updated);
+}
+
+
 bool Code::is_inline_cache_stub() {
   Kind kind = this->kind();
   switch (kind) {