[Isolates] Merge crankshaft (r5922 from bleeding_edge).

test/mjsunit/regress/regress-580.js

 // 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 14 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Test constant folding of smi operations that overflow a 32-bit int
 // See http://code.google.com/p/v8/issues/detail?id=580
 
 function num_ops() {
   var x;
   var tmp = 0;
   x = (tmp = 1578221999, tmp)+(tmp = 572285336, tmp);
-  assertEquals(2150507335, x);
+  assertEquals(2150507335, x, "++");
   x = 1578221999 + 572285336;
   assertEquals(2150507335, x);
 
   x = (tmp = -1500000000, tmp)+(tmp = -2000000000, tmp);
-  assertEquals(-3500000000, x);
+  assertEquals(-3500000000, x, "+-");
   x = -1500000000 + -2000000000;
   assertEquals(-3500000000, x);
 
   x = (tmp = 1578221999, tmp)-(tmp = -572285336, tmp);
-  assertEquals(2150507335, x);
+  assertEquals(2150507335, x, "--");
   x = 1578221999 - -572285336;
   assertEquals(2150507335, x);
 
   x = (tmp = -1500000000, tmp)-(tmp = 2000000000, tmp);
-  assertEquals(-3500000000, x);
+  assertEquals(-3500000000, x, "-+");
   x = -1500000000 - 2000000000;
   assertEquals(-3500000000, x);
 }
 
 num_ops();