Fix receiver check in arguments ICs.

src/ia32/ic-ia32.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 455 matching lines @@
 static Operand GenerateMappedArgumentsLookup(MacroAssembler* masm,
                                              Register object,
                                              Register key,
                                              Register scratch1,
                                              Register scratch2,
                                              Label* unmapped_case,
                                              Label* slow_case) {
   Heap* heap = masm->isolate()->heap();
   Factory* factory = masm->isolate()->factory();
 
-  // Check that the receiver isn't a smi.
+  // Check that the receiver is a JSObject. Because of the elements
+  // 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.
+  __ CmpObjectType(object, FIRST_JS_RECEIVER_TYPE, scratch1);
+  __ j(below, slow_case);
 
   // Check that the key is a positive smi.
   __ test(key, Immediate(0x8000001));
   __ j(not_zero, slow_case);
 
   // Load the elements into scratch1 and check its map.
   Handle<Map> arguments_map(heap->non_strict_arguments_elements_map());
   __ mov(scratch1, FieldOperand(object, JSObject::kElementsOffset));
   __ CheckMap(scratch1, arguments_map, slow_case, DONT_DO_SMI_CHECK);
 
@@ skipping 1242 matching lines @@
   Condition cc = *jmp_address == Assembler::kJncShortOpcode
       ? not_zero
       : zero;
   *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32