KhronosGroup/WebGL — pull request #483 by zhenyao (2014-02-27 22:04:13+00:00)
Title: Strengthen the test case for loop-unrolling.

So the index might not just be a symbol, but could be expression.
Also, see if the index used as function param also get replaced with value while unrolling.

This is added due to bugs in the attempted implementation.