------- Comment #15 from mikpe at it dot uu dot se 2010-07-28 23:31 ------- Richard's proposed fix appears to need the PR44284 fix to avoid regressing vect-20.c, much like PR44828 also needed PR44284 to not regress vectorization tests. Current 4.5 has PR44284 backported, so the PR45034 fix works there.
I did a preliminary backport of the first PR44284 fix to 4.4, and that solved the vect-20.c regression but caused a couple of regressions of its own. I'll try backporting the followup fixes too, but I suspect the rational conclusion will be to not backport the PR45034 fix, or to backport it with an adjustment to vect-20.c to expect the reduced vectorization. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45034