Add Smi support to Shl

src/x64/lithium-codegen-x64.cc

 // Copyright 2013 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 1435 matching lines @@
       case Token::SHR:
         if (shift_count == 0 && instr->can_deopt()) {
           __ testl(ToRegister(left), ToRegister(left));
           DeoptimizeIf(negative, instr->environment());
         } else {
           __ shrl(ToRegister(left), Immediate(shift_count));
         }
         break;
       case Token::SHL:
         if (shift_count != 0) {
-          __ shll(ToRegister(left), Immediate(shift_count));
+          if (instr->hydrogen_value()->representation().IsSmi()) {
+            __ shl(ToRegister(left), Immediate(shift_count));
+          } else {
+            __ shll(ToRegister(left), Immediate(shift_count));
+          }
         }
         break;
       default:
         UNREACHABLE();
         break;
     }
   }
 }
 
 
@@ skipping 4079 matching lines @@
                                FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64