Remove a generated mov and jmp.

src/x64/fast-codegen-x64.cc

 // Copyright 2010 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 147 matching lines @@
     }
   } else if (destination().is(no_reg)) {
     // Result is not needed but do not clobber the operands in case of
     // bailout.
     __ movq(scratch0(), accumulator1());
     __ or_(scratch0(), accumulator0());
     __ JumpIfNotSmi(scratch0(), bailout());
   } else {
     // Preserve the destination operand in a scratch register in case of
     // bailout.
-    Label done;
     __ movq(scratch0(), destination());
     __ or_(destination(), other_accumulator(destination()));
-    __ JumpIfSmi(destination(), &done);
-    __ movq(destination(), scratch0());
-    __ jmp(bailout());
-    __ bind(&done);
+    __ JumpIfNotSmi(destination(), bailout());
   }
 
 
   // If we didn't bailout, the result (in fact, both inputs too) is known to
   // be a smi.
   set_as_smi(accumulator0());
   set_as_smi(accumulator1());
 }
 
 
@@ skipping 48 matching lines @@
   __ ret((scope()->num_parameters() + 1) * kPointerSize);
 
   __ bind(&bailout_);
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal