imageworks/OpenShadingLanguage — pull request #116 by lgritz (2012-02-28 22:38:49+00:00)
Title: Review: optimize unused parametersMore careful identification and removal of params (input and output) tha...

...t

are both unused in the shader and not connected downstream. Previously,
this analysis could be foiled by init ops, which would make it look like
the params were used, and thus the params would not be culled.