[Bug middle-end/39326] Segmentation fault with -O1, out of memory with -O2

[steven at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39326

--- Comment #44 from Steven Bosscher <steven at gcc dot gnu.org> 2013-03-09 17:25:46 UTC ---
Created attachment 29628
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29628
Re-use store register if possible

This patch resolves the issue mentioned in comment #43, and makes
combine run in reasonable time.