The Global Load IC doesn't yet play well with --vector-ics.

src/full-codegen.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/ast.h"
 #include "src/ast-numbering.h"
 #include "src/code-factory.h"
 #include "src/codegen.h"
@@ skipping 424 matching lines @@
 
 
 void FullCodeGenerator::CallLoadIC(ContextualMode contextual_mode,
                                    TypeFeedbackId id) {
   Handle<Code> ic = CodeFactory::LoadIC(isolate(), contextual_mode).code();
   CallIC(ic, id);
 }
 
 
 void FullCodeGenerator::CallGlobalLoadIC(Handle<String> name) {
-  if (masm()->serializer_enabled()) return CallLoadIC(CONTEXTUAL);
+  if (masm()->serializer_enabled() || FLAG_vector_ics) {
+    // Vector-ICs don't work with LoadGlobalIC.
+    return CallLoadIC(CONTEXTUAL);
+  }
   Handle<Code> ic = CodeFactory::LoadGlobalIC(
                         isolate(), isolate()->global_object(), name).code();
   CallIC(ic, TypeFeedbackId::None());
 }
 
 
 void FullCodeGenerator::CallStoreIC(TypeFeedbackId id) {
   Handle<Code> ic = CodeFactory::StoreIC(isolate(), language_mode()).code();
   CallIC(ic, id);
 }
@@ skipping 1358 matching lines @@
   }
   codegen_->PrepareForBailoutForId(exit_id_, NO_REGISTERS);
   codegen_->scope_ = saved_scope_;
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal