diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/regalloc-double.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/regalloc-double.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,12 @@
+// register allocation involving doubles.
+
+function foo(a,b) {
+  var c;
+  if (a < b) {
+    c = a + 1;
+  } else {
+    c = 0.5;
+  }
+  return c;
+}
+assertEq(foo(0, 1), 1);