diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/testTableSwitchX.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/testTableSwitchX.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,25 @@
+// Tests for JSOP_TABLESWITCHX.
+function test1() {
+    var src =
+        "var a = 0;\n" +
+        "switch(x) {\n";
+    for (var i=-1; i<4; i++) {
+        src += (i >= 0) ?
+                "case " + i + ":\n" :
+                "default:\n";
+        for (var j=0; j<1500; j++) {
+            src += "a = " + i + ";";
+        }
+        src += "break;\n";
+    }
+    src += "}\n";
+    src += "return a;";
+
+    var f = new Function("x", src);
+    assertEq(f(0), 0);
+    assertEq(f(4), -1);
+    assertEq(f(), -1);
+    assertEq(f(1.1), -1);
+    assertEq(f(3), 3);
+}
+test1();