[Bug tree-optimization/39300] vectorizer confused by predictive commoning and PRE

matz at gcc dot gnu dot org gcc-bugzilla@gcc.gnu.org
Wed Jul 22 15:40:00 GMT 2009



------- Comment #8 from matz at gcc dot gnu dot org  2009-07-22 15:40 -------
So, the immediate problem is now fixed, but I'd suggest leaving this
enhancement request open, in case anybody wants to work on extending the
vectorizer to deal with these loop-carried dependencies, because in that
case we wouldn't need to dumb down PRE anymore, which would be even better.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39300



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