Introduce flag --allocation-site-transitioning

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index f6ec456bd4ddebf0349bf77a6b235aae48c3d784..0ef99f864ad0e400cde16a9b33d7642663639e5d 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -12596,6 +12596,7 @@ bool AllocationSite::IsNestedSite() {
 
 void AllocationSite::DigestTransitionFeedback(Handle<AllocationSite> site,
                                               ElementsKind to_kind) {
+  DCHECK(FLAG_allocation_site_transitioning);
   Isolate* isolate = site->GetIsolate();
 
   if (site->SitePointsToLiteral() && site->transition_info()->IsJSArray()) {
@@ -12651,6 +12652,11 @@ void AllocationSite::DigestTransitionFeedback(Handle<AllocationSite> site,
 void AllocationSite::AddDependentCompilationInfo(Handle<AllocationSite> site,
                                                  Reason reason,
                                                  CompilationInfo* info) {
+  if ((!FLAG_allocation_site_pretenuring && reason == TENURING) ||
+      (!FLAG_allocation_site_transitioning && reason == TRANSITIONS)) {
+    return;
+  }
+
   DependentCode::DependencyGroup group = site->ToDependencyGroup(reason);
   Handle<DependentCode> dep(site->dependent_code());
   Handle<DependentCode> codes =
@@ -12675,6 +12681,7 @@ const char* AllocationSite::PretenureDecisionName(PretenureDecision decision) {
 
 void JSObject::UpdateAllocationSite(Handle<JSObject> object,
                                     ElementsKind to_kind) {
+  if (!FLAG_allocation_site_transitioning) return;
   if (!object->IsJSArray()) return;
 
   Heap* heap = object->GetHeap();