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[Bug tree-optimization/21734] [4.1 regression] ICE: -ftree-vectorize, segfault
- From: "dorit at il dot ibm dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 25 May 2005 07:28:36 -0000
- Subject: [Bug tree-optimization/21734] [4.1 regression] ICE: -ftree-vectorize, segfault
- References: <20050524080015.21734.stefaandr@hotmail.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- 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
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21734