[Bug tree-optimization/21734] [4.1 regression] ICE: -ftree-vectorize, segfault

[dorit at il dot ibm dot com]

------- Additional Comments From dorit at il dot ibm dot com  2005-05-25 07:28 -------
> Actually, this is a bug in the vectorizer code to update PHIs in duplicate
> loops.  forwprop AFAICT is just exposing the latent vectorizer bug.
> >From what I've been able to determine so far, the vectorizer code to
> update PHIs doesn't properly handle the case where a PHI is dead.  It
> is likely someone with more experience in the vectorizer code is going
> to need to fix this.

I'll take a look



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21734