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[Bug tree-optimization/38401] TreeSSA-PRE load after store misoptimization
- From: "steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 15 Dec 2008 17:38:15 -0000
- Subject: [Bug tree-optimization/38401] TreeSSA-PRE load after store misoptimization
- References: <bug-38401-16914@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #15 from steven at gcc dot gnu dot org 2008-12-15 17:38 -------
Re. comment #14: Yes, I suppose so. Why do you want to remove gcse-las from
mainline. Not that I'm against it -- ideally RTL gcse.c would not work on
memory at all anymore -- but I wouldn't remove gcse-las until we catch in the
GIMPLE optimizers as much as possible of the things we still need gcse-las for.
It seems to me, btw, that it might be easier to teach GIMPLE loop invariant
code motion about this transformation. Adding this in GIMPLE PRE might be a
little too expensive...?
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38401