Handle non-object constants in HConstant::GetMonomorphicJSObjectMap.

src/hydrogen-instructions.h

 // 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.
 
 #ifndef V8_HYDROGEN_INSTRUCTIONS_H_
 #define V8_HYDROGEN_INSTRUCTIONS_H_
 
 #include "src/v8.h"
 
 #include "src/allocation.h"
@@ skipping 3475 matching lines @@
                                          HValue* context,
                                          int32_t value,
                                          Representation representation,
                                          HInstruction* instruction) {
     return instruction->Append(HConstant::New(
         zone, context, value, representation));
   }
 
   virtual Handle<Map> GetMonomorphicJSObjectMap() OVERRIDE {
     Handle<Object> object = object_.handle();
-    if (object->IsHeapObject()) {
+    if (!object.is_null() && object->IsHeapObject()) {
       return v8::internal::handle(HeapObject::cast(*object)->map());
     }
     return Handle<Map>();
   }
 
   static HConstant* CreateAndInsertBefore(Zone* zone,
                                           HValue* context,
                                           int32_t value,
                                           Representation representation,
                                           HInstruction* instruction) {
@@ skipping 4385 matching lines @@
 };
 
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_