diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/truncateToInt32-ool.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/truncateToInt32-ool.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,28 @@
+function f (x) {
+    return x >> 0;
+}
+
+var table = [
+    [NaN, 0],
+
+    [Infinity, 0],
+    [-Infinity, 0],
+    [0, 0],
+    [-0, 0],
+
+    [15, 15],
+    [-15, -15],
+
+    [0x80000000, -0x80000000],
+    [-0x80000000, -0x80000000],
+
+    [0xffffffff, -1],
+    [-0xffffffff, 1],
+
+    [0x7fffffff, 0x7fffffff],
+    [-0x7fffffff, -0x7fffffff]
+]
+
+for (var i = 0; i < table.length; i++) {    
+    assertEq(f(table[i][0]), table[i][1]);
+}