[PATCH] Peephole optimization causes different code generation at "-O2 -g" and "-O2".

[Katya Romanova]

  Hi Eric,
  Out of curiosity: what is so special about Atom? Are we talking about X86 or x86_64?

  Just to confirm that we are on the same page...
  You would like me to add one more check to the test. Something like that:
  ; RUN: llc < %s -mcpu=atom -mtriple=i686-linux | FileCheck %s

  Should I do the same check (for Atom) for the other -g -O2/-O2 difference bug fix that I filed?
  http://llvm-reviews.chandlerc.com/D2970

  Thanks!
  Katya.

http://llvm-reviews.chandlerc.com/D2728