http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50873
--- Comment #2 from Matthew Gretton-Dann <mgretton at sourceware dot org> 2011-10-27 13:31:27 UTC --- (In reply to comment #1) > I see this too, but I don't think it's my patch's fault. I reverted it and the > reduced test still failed. The patch makes no difference for this basic block > - > it gets vectorized with or without it. Apologies if I've miss labelled this issue - git bisect suggested that r180367 was where the issue was introduced. I will take another look this afternoon to see if I misread the output and it was another check-in nearby.