Add missing SmiUntag for string hash calculation in

src/ia32/code-stubs-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 6024 matching lines @@
                                     Register character,
                                     Register scratch) {
   // hash = (seed + character) + ((seed + character) << 10);
   if (Serializer::enabled()) {
     ExternalReference roots_array_start =
         ExternalReference::roots_array_start(masm->isolate());
     __ mov(scratch, Immediate(Heap::kHashSeedRootIndex));
     __ mov(scratch, Operand::StaticArray(scratch,
                                          times_pointer_size,
                                          roots_array_start));
+    __ SmiUntag(scratch);
     __ add(scratch, character);
     __ mov(hash, scratch);
     __ shl(scratch, 10);
     __ add(hash, scratch);
   } else {
     int32_t seed = masm->isolate()->heap()->HashSeed();
     __ lea(scratch, Operand(character, seed));
     __ shl(scratch, 10);
     __ lea(hash, Operand(scratch, character, times_1, seed));
   }
@@ skipping 1290 matching lines @@
                                  false);
   __ pop(edx);
   __ ret(0);
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32