Correct bug with left shift on X64 platform from change 4571 (http://code.goo...

test/mjsunit/smi-ops.js

 // Copyright 2008 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 660 matching lines @@
 assertEquals(3, shiftByZero(3.1415));
 
 // Verify that the static type information of x >>> 32 is computed correctly.
 function LogicalShiftRightByMultipleOf32(x) {
   x = x >>> 32;
   return x + x;
 }
 
 assertEquals(4589934592, LogicalShiftRightByMultipleOf32(-2000000000));
 assertEquals(4589934592, LogicalShiftRightByMultipleOf32(-2000000000));
+
+// Verify that the shift amount is reduced modulo 32, not modulo 64.
+function LeftShiftThreeBy(x) {return 3 << x;}
+assertEquals(24, LeftShiftThreeBy(3));
+assertEquals(24, LeftShiftThreeBy(35));
+assertEquals(24, LeftShiftThreeBy(67));
+assertEquals(24, LeftShiftThreeBy(-29));