Fix receiver check in arguments ICs.

src/arm/ic-arm.cc

 // Copyright 2011 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 874 matching lines @@
 static MemOperand GenerateMappedArgumentsLookup(MacroAssembler* masm,
                                                 Register object,
                                                 Register key,
                                                 Register scratch1,
                                                 Register scratch2,
                                                 Register scratch3,
                                                 Label* unmapped_case,
                                                 Label* slow_case) {
   Heap* heap = masm->isolate()->heap();
 
-  // Check that the receiver isn't a smi.
+  // Check that the receiver is a JSObject. Because of the map check
+  // later, we do not need to check for interceptors or whether it
+  // requires access checks.
   __ JumpIfSmi(object, slow_case);
+  // Check that the object is some kind of JSObject.
+  __ CompareObjectType(object, scratch1, scratch2, FIRST_JS_RECEIVER_TYPE);
+  __ b(lt, slow_case);
 
   // Check that the key is a positive smi.
   __ tst(key, Operand(0x8000001));
   __ b(ne, slow_case);
 
   // Load the elements into scratch1 and check its map.
   Handle<Map> arguments_map(heap->non_strict_arguments_elements_map());
   __ ldr(scratch1, FieldMemOperand(object, JSObject::kElementsOffset));
   __ CheckMap(scratch1, scratch2, arguments_map, slow_case, DONT_DO_SMI_CHECK);
 
@@ skipping 801 matching lines @@
     Register reg = Assembler::GetRn(instr_at_patch);
     patcher.masm()->tst(reg, Operand(kSmiTagMask));
     patcher.EmitCondition(eq);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM