[Bug tree-optimization/36630] [4.3/4.4 Regression] ICE in vect_update_ivs_after_vectorizer

[spop at gcc dot gnu dot org]

------- Comment #9 from spop at gcc dot gnu dot org  2008-09-03 21:02 -------
Subject: Re:  [4.3/4.4 Regression] ICE in vect_update_ivs_after_vectorizer

> Another thing, 4.4 does not vectorize this loop anymore (and, therefore, there
> is no ICE), because of unknown number of iterations:

I also have remarked on one of the graphite testcases scop-matmult.c
that we had a regression in the precision of the number of iterations from
last graphite merge till yesterday's merge, i.e. from 138275 to 139870
We used to have a symbolic number of iterations, but now the result
is scev_dont_know.  I have not yet tracked this down to the patch that
produced this regression.

Sebastian


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36630