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[Bug tree-optimization/38401] TreeSSA-PRE load after store misoptimization
- From: "sergeid at il dot ibm dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 8 Dec 2008 10:03:02 -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 #9 from sergeid at il dot ibm dot com 2008-12-08 10:03 -------
Subject: Re: TreeSSA-PRE load after store
misoptimization
Can you post your gcc configuration options?
I've created and attached a little patch which adds some more information
to dump file. Can you apply it and send me the new .gcse1 dump? Then I'll
compare it with mine and may be we'll find the reason.
"steven at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> wrote on
04/12/2008 20:16:05:
> I still don't see why this is caught on powerpc by RTL PRE, but not on
ia64
> (note *ia64*, not x86). I compile with -O3 -fgcse-las. The compiler is
> yesterday's trunk on ia64-unknown-linux-gnu. The .gcse1 dump is
> attached. Why
> is it optimized for you on powerpc but not for me on ia64?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38401