Reland 21774: Generate KeyedLoadGeneric with Hydrogen

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index a824d6a7977c34fbd0f6508c3dd4779193a56fa5..34d30ac2952cd8de6b0bf9ca4ca1cafcc3e15f2c 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -5560,16 +5560,17 @@ RUNTIME_FUNCTION(Runtime_StoreArrayLiteralElement) {
     HeapNumber* number = HeapNumber::cast(*value);
     double_array->set(store_index, number->Number());
   } else {
-    ASSERT(IsFastSmiElementsKind(elements_kind) ||
-           IsFastDoubleElementsKind(elements_kind));
-    ElementsKind transitioned_kind = IsFastHoleyElementsKind(elements_kind)
-        ? FAST_HOLEY_ELEMENTS
-        : FAST_ELEMENTS;
-    JSObject::TransitionElementsKind(object, transitioned_kind);
-    if (IsMoreGeneralElementsKindTransition(
-            boilerplate_object->GetElementsKind(),
-            transitioned_kind)) {
-      JSObject::TransitionElementsKind(boilerplate_object, transitioned_kind);
+    if (!IsFastObjectElementsKind(elements_kind)) {
+      ElementsKind transitioned_kind = IsFastHoleyElementsKind(elements_kind)
+          ? FAST_HOLEY_ELEMENTS
+          : FAST_ELEMENTS;
+      JSObject::TransitionElementsKind(object, transitioned_kind);
+      ElementsKind boilerplate_elements_kind =
+          boilerplate_object->GetElementsKind();
+      if (IsMoreGeneralElementsKindTransition(boilerplate_elements_kind,
+                                              transitioned_kind)) {
+        JSObject::TransitionElementsKind(boilerplate_object, transitioned_kind);
+      }
     }
     FixedArray* object_array = FixedArray::cast(object->elements());
     object_array->set(store_index, *value);