imageworks/OpenShadingLanguage — pull request #190 by lgritz (2012-12-18 00:40:18+00:00)
Title: Subtle bug fix in how we "skip" inserted opcodes

Subtle bug fix in how we "skip" inserted opcodes: we still need to clear
block aliases for args written by the ops we skip, or our notion of
which values are in which variables will be wrong. This was not
reported as a bug, I just happened to notice it as I was working on
something else.