diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/asm.js/testBug863867.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/asm.js/testBug863867.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,34 @@
+assertEq((function() {
+  'use asm';
+  function _main() {
+    var $1=0, $2=0, $3=0, $4=0, $5=0, $6=0, $7=0, $8=0, $9=0, $10=0, label=0;
+    label = 1;
+    while (1) {
+      switch (label | 0) {
+       case 1:
+        $2 = $1 + 14 | 0;
+        $3 = $1;
+        label = 20;
+        break;
+       case 20:
+        $5 = $2;
+        $4 = $3;
+        label = 24;
+        break;
+       case 24:
+        $7 = $5 + 1 | 0;
+        $8 = $4 + 1 | 0;
+        return $8|0;
+       case 49:
+        $9 = $6 + 1 | 0;
+        if ($10) {
+          $6 = $9;
+          break;
+        }
+        return 0;
+      }
+    }
+    return 0;
+  }
+  return _main;
+})()(), 1);