diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug729573.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug729573.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+function TestCase(n, d, e, a)
+function writeHeaderToLog( string ) {}
+var SECTION = "11.7.2";
+for ( power = 0; power <= 32; power++ ) {
+  shiftexp = Math.pow( 2, power );
+  for ( addexp = 0; addexp <= 32; addexp++ ) {
+    new TestCase( SECTION, SignedRightShift( shiftexp, addexp ), shiftexp >> addexp );
+  }
+}
+function ToInt32BitString( n ) {
+  var b = "";
+  return b;
+}
+function SignedRightShift( s, a ) {
+  s = ToInt32BitString( s );
+  s = s.substring( 0, 1 | Math && 0xffffffff + 2 );
+}