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[Bug c/30843] ice for legal code with -ftree-vectorize -O2
- 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: 19 Feb 2007 08:28:57 -0000
- Subject: [Bug c/30843] ice for legal code with -ftree-vectorize -O2
- References: <bug-30843-9596@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from dorit at il dot ibm dot com 2007-02-19 08:28 -------
> Looks like possibly some bad interaction between vectorization of induction and
> vectorization of strided-access. Will investigate.
I looked into it with Ira, and looks like the problem is that during
transformation we remove each of the stores of the interleaved-group as we scan
the stmts, but we actually vectorize them all together only when we reach the
last store of the interleaved-group, at which point, we attempt to insert the
loop-update for the vectorized induction before one of the stores - and crash.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30843