VectorICs: megamorphic keyed loads in crankshaft don't need a vector.

src/ic/ic.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/arguments.h"
 #include "src/base/bits.h"
@@ skipping 987 matching lines @@
   if (FLAG_vector_ics) {
     return KeyedLoadICTrampolineStub(isolate).GetCode();
   }
 
   return isolate->builtins()->KeyedLoadIC_Initialize();
 }
 
 
 Handle<Code> KeyedLoadIC::initialize_stub_in_optimized_code(
     Isolate* isolate, State initialization_state) {
-  if (FLAG_vector_ics) {
+  if (FLAG_vector_ics && initialization_state != MEGAMORPHIC) {
     return VectorRawKeyedLoadStub(isolate).GetCode();
   }
   switch (initialization_state) {
     case UNINITIALIZED:
       return isolate->builtins()->KeyedLoadIC_Initialize();
     case PREMONOMORPHIC:
       return isolate->builtins()->KeyedLoadIC_PreMonomorphic();
     case MEGAMORPHIC:
       return isolate->builtins()->KeyedLoadIC_Megamorphic();
     default:
@@ skipping 2026 matching lines @@
 static const Address IC_utilities[] = {
 #define ADDR(name) FUNCTION_ADDR(name),
     IC_UTIL_LIST(ADDR) NULL
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) { return IC_utilities[id]; }
 }
 }  // namespace v8::internal