CompileArrayPushCall should not use context register as a scratch.

src/ia32/stub-cache-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 1493 matching lines @@
       __ bind(&attempt_to_grow_elements);
       if (!FLAG_inline_new) {
         __ jmp(&call_builtin);
       }
 
       __ mov(edi, Operand(esp, argc * kPointerSize));
       // Growing elements that are SMI-only requires special handling in case
       // the new element is non-Smi. For now, delegate to the builtin.
       Label no_fast_elements_check;
       __ JumpIfSmi(edi, &no_fast_elements_check);
-      __ mov(esi, FieldOperand(edx, HeapObject::kMapOffset));
-      __ CheckFastObjectElements(esi, &call_builtin, Label::kFar);
+      __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset));
+      __ CheckFastObjectElements(ecx, &call_builtin, Label::kFar);
       __ bind(&no_fast_elements_check);
 
       // We could be lucky and the elements array could be at the top of
       // new-space.  In this case we can just grow it in place by moving the
       // allocation pointer up.
 
       ExternalReference new_space_allocation_top =
           ExternalReference::new_space_allocation_top_address(isolate());
       ExternalReference new_space_allocation_limit =
           ExternalReference::new_space_allocation_limit_address(isolate());
@@ skipping 2490 matching lines @@
   Handle<Code> ic_miss = masm->isolate()->builtins()->KeyedStoreIC_Miss();
   __ jmp(ic_miss, RelocInfo::CODE_TARGET);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32