diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/doubleComparisons.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/doubleComparisons.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,88 @@
+
+function gen_f(x) {
+    var f = "{\n" +
+	    "    var x = " + x + ";\n" + 
+	    "    if (x)\n" +
+	    "        return true;\n" +
+	    "    return false;\n" +
+	    "}";
+    return new Function(f);
+}
+
+function run_f(x) {
+    return gen_f(x)();
+}
+
+function gen_k(x, op, y) {
+    var f = "{\n" +
+	    "    var x = " + x + ";\n" +
+	    "    var y = " + y + ";\n" +
+	    "    if (x " + op + " y)\n" +
+	    "        return true;\n" +
+	    "    return false;\n" +
+	    "}";
+    return new Function(f);
+}
+
+function run_k(x, op, y) {
+    return gen_k(x, op, y)();
+}
+
+function gen_r(x, op, y) {
+    var f = "{\n" +
+	    "    var x = " + x + ";\n" +
+	    "    var y = " + y + ";\n" +
+	    "    return x " + op + " y;\n" +
+	    "}";
+    return new Function(f);
+}
+
+function run_r(x, op, y) {
+    return gen_r(x, op, y)();
+}
+
+assertEq(run_f("1 / 0"), true);
+assertEq(run_f("0 / 0"), false);
+assertEq(run_f("-0"), false);
+assertEq(run_f(1.3), true);
+
+// Ordered results.
+assertEq(run_k(1.3, ">", 2.3), false);
+assertEq(run_k(2.3, ">", 2.3), false);
+assertEq(run_k(2.4, ">", 2.3), true);
+assertEq(run_k(1.3, ">=", 2.3), false);
+assertEq(run_k(2.3, ">=", 2.3), true);
+assertEq(run_k(2.4, ">=", 2.3), true);
+assertEq(run_k(1.3, "<", 2.3), true);
+assertEq(run_k(2.3, "<", 2.3), false);
+assertEq(run_k(2.4, "<", 2.3), false);
+assertEq(run_k(1.3, "<", 2.3), true);
+assertEq(run_k(2.3, "<=", 2.3), true);
+assertEq(run_k(2.4, "<", 2.3), false);
+
+// Unordered results.
+assertEq(run_k("NaN", "<", 2.5), false);
+assertEq(run_k("NaN", "<=", 2.5), false);
+assertEq(run_k("NaN", ">", 2.5), false);
+assertEq(run_k("NaN", ">=", 2.5), false);
+
+// Ordered results.
+assertEq(run_r(1.3, ">", 2.3), false);
+assertEq(run_r(2.3, ">", 2.3), false);
+assertEq(run_r(2.4, ">", 2.3), true);
+assertEq(run_r(1.3, ">=", 2.3), false);
+assertEq(run_r(2.3, ">=", 2.3), true);
+assertEq(run_r(2.4, ">=", 2.3), true);
+assertEq(run_r(1.3, "<", 2.3), true);
+assertEq(run_r(2.3, "<", 2.3), false);
+assertEq(run_r(2.4, "<", 2.3), false);
+assertEq(run_r(1.3, "<", 2.3), true);
+assertEq(run_r(2.3, "<=", 2.3), true);
+assertEq(run_r(2.4, "<", 2.3), false);
+
+// Unordered results.
+assertEq(run_r("NaN", "<", 2.5), false);
+assertEq(run_r("NaN", "<=", 2.5), false);
+assertEq(run_r("NaN", ">", 2.5), false);
+assertEq(run_r("NaN", ">=", 2.5), false);
+