Fix HCheckSmiOrInt32 fake observed representation.

src/hydrogen-instructions.h

 // 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 2801 matching lines @@
     SetFlag(kFlexibleRepresentation);
     SetFlag(kUseGVN);
   }
 
   virtual int RedefinedOperandIndex() { return 0; }
   virtual Representation RequiredInputRepresentation(int index) {
     return representation();
   }
   virtual void InferRepresentation(HInferRepresentation* h_infer);
 
+  virtual Representation observed_input_representation(int index) {
+    return Representation::Integer32();
+  }
+
   virtual HValue* Canonicalize() {
     if (representation().IsTagged() && !type().IsSmi()) {
       return this;
     } else {
       return value();
     }
   }
 
   DECLARE_CONCRETE_INSTRUCTION(CheckSmiOrInt32)
 
@@ skipping 3182 matching lines @@
   virtual bool IsDeletable() const { return true; }
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_