[turbofan] Recognize rotate right.

test/mjsunit/asm/word32ror.js

Index: test/mjsunit/asm/word32ror.js
diff --git a/test/mjsunit/asm/word32ror.js b/test/mjsunit/asm/word32ror.js
index d385eac52eec41c826edc069d45b423bf287ec12..9535bdee8a5e63c60133569200deb0a158339070 100644
--- a/test/mjsunit/asm/word32ror.js
+++ b/test/mjsunit/asm/word32ror.js
@@ -20,3 +20,18 @@ 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));