[turbofan] Recognize rotate right.

test/mjsunit/asm/word32ror.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var stdlib = {};
 var foreign = {};
 var heap = new ArrayBuffer(64 * 1024);
 
 var rol = (function Module(stdlib, foreign, heap) {
   "use asm";
   function rol(x, y) {
     x = x | 0;
     y = y | 0;
     return (x << y) | (x >>> (32 - y));
   }
   return { rol: rol };
 })(stdlib, foreign, heap).rol;
 
 assertEquals(10, rol(10, 0));
 assertEquals(2, rol(1, 1));
 assertEquals(0x40000000, rol(1, 30));
 assertEquals(-0x80000000, rol(1, 31));
+
+var ror = (function Module(stdlib, foreign, heap) {
+  "use asm";
+  function ror(x, y) {
+    x = x | 0;
+    y = y | 0;
+    return (x << (32 - y)) | (x >>> y);
+  }
+  return { ror: ror };
+})(stdlib, foreign, heap).ror;
+
+assertEquals(10, ror(10, 0));
+assertEquals(-0x80000000, ror(1, 1));
+assertEquals(0x40000000, ror(1, 2));
+assertEquals(2, ror(1, 31));