[PATCH] ARM: fix Oz sp-adjust folding to respect callee-saved registers

[Renato Golin]

  Hi Tim,

  Sorry, I had a look but bailed when Anton replied. I know I should stop doing this... ;)

  This change looks good to me, if Anton is ok, too, go ahead. I agree with this going to 3.4.

  cheers,
  --renato

http://llvm-reviews.chandlerc.com/D2285