Use POLYMORPHIC for polymorphic Keyed(Load|Store)IC

src/arm/stub-cache-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3309 matching lines @@
     __ mov(ip, Operand(receiver_maps->at(current)));
     __ cmp(r2, ip);
     __ Jump(handler_ics->at(current), RelocInfo::CODE_TARGET, eq);
   }
 
   __ bind(&miss);
   Handle<Code> miss_ic = isolate()->builtins()->KeyedLoadIC_Miss();
   __ Jump(miss_ic, RelocInfo::CODE_TARGET, al);
 
   // Return the generated code.
-  return GetCode(Code::NORMAL, factory()->empty_string(), MEGAMORPHIC);
+  return GetCode(Code::NORMAL, factory()->empty_string(), POLYMORPHIC);
 }
 
 
 Handle<Code> KeyedStoreStubCompiler::CompileStoreField(Handle<JSObject> object,
                                                        int index,
                                                        Handle<Map> transition,
                                                        Handle<String> name) {
   // ----------- S t a t e -------------
   //  -- r0    : value
   //  -- r1    : name
@@ skipping 83 matching lines @@
       __ Jump(handler_stubs->at(i), RelocInfo::CODE_TARGET, al);
       __ bind(&next_map);
     }
   }
 
   __ bind(&miss);
   Handle<Code> miss_ic = isolate()->builtins()->KeyedStoreIC_Miss();
   __ Jump(miss_ic, RelocInfo::CODE_TARGET, al);
 
   // Return the generated code.
-  return GetCode(Code::NORMAL, factory()->empty_string(), MEGAMORPHIC);
+  return GetCode(Code::NORMAL, factory()->empty_string(), POLYMORPHIC);
 }
 
 
 Handle<Code> ConstructStubCompiler::CompileConstructStub(
     Handle<JSFunction> function) {
   // ----------- S t a t e -------------
   //  -- r0    : argc
   //  -- r1    : constructor
   //  -- lr    : return address
   //  -- [sp]  : last argument
@@ skipping 927 matching lines @@
     __ Jump(ic_slow, RelocInfo::CODE_TARGET);
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM