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[Bug tree-optimization/23346] [4.1/4.2/4.3 Regression] FRE before DCE makes a mess of loads or need to sink loads
- From: "pinskia 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 Jan 2007 20:15:48 -0000
- Subject: [Bug tree-optimization/23346] [4.1/4.2/4.3 Regression] FRE before DCE makes a mess of loads or need to sink loads
- References: <bug-23346-6528@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #15 from pinskia at gcc dot gnu dot org 2007-01-15 20:15 -------
Even though we now do a DCE before FRE, we still don't get this correct as we
don't have we don't have aliasing (during the first DCE) so we assume all loads
as violatile.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2006-10-10 11:58:07 |2007-01-15 20:15:47
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23346