[PATCH] Branch folding causes different code generation at "-O2 -g" and "-O2"

[Katya Romanova]

  Hi Chandler,
  This bugfix is still sitting in my queue. Is it OK to commit?  If you are busy, maybe Eric could review?

  I will make a small change to the testcase before I commit. I will add -mtriple-x86_64-linux to the RUN line.

  Thank you!
  Katya.

http://llvm-reviews.chandlerc.com/D2970