diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/parallel/Array-reducePar-mul-short.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/parallel/Array-reducePar-mul-short.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,16 @@
+load(libdir + "parallelarray-helpers.js");
+
+function testReduce() {
+  // This test is interesting because during warmup v*p remains an
+  // integer but this ceases to be true once real execution proceeds.
+  // By the end, it will just be some double value.
+
+  function mul(v, p) { return v*p; }
+
+  // Ensure that the array only contains values between 1 and 4.
+  var array = range(1, 513).map(function(v) { return (v % 4) + 1; });
+  assertArraySeqParResultsEq(array, "reduce", mul, assertAlmostEq);
+}
+
+if (getBuildConfiguration().parallelJS)
+  testReduce();