diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/parallel/alloc-array.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/parallel/alloc-array.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,33 @@
+load(libdir + "parallelarray-helpers.js");
+
+function buildSimple() {
+
+    assertParallelModesCommute(["seq", "par"], function(m) {
+        return Array.buildPar(256, function(i) {
+            return [i, i+1, i+2, i+3];
+        }, m);
+    });
+
+    assertParallelModesCommute(["seq", "par"], function(m) {
+        return Array.buildPar(256, function(i) {
+            var x = [];
+            for (var i = 0; i < 4; i++) {
+                x[i] = i;
+            }
+            return x;
+        }, m);
+    });
+
+    assertParallelModesCommute(["seq", "par"], function(m) {
+        return Array.buildPar(256, function(i) {
+            var x = [];
+            for (var i = 0; i < 99; i++) {
+                x[i] = i;
+            }
+            return x;
+        }, m);
+    });
+}
+
+if (getBuildConfiguration().parallelJS)
+  buildSimple();