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[Bug target/36713] [4.4 regression] r137252 breaks -O2 optimization on x86_64-unknown-linux-gnu
- From: "dfranke at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 3 Jul 2008 10:40:53 -0000
- Subject: [Bug target/36713] [4.4 regression] r137252 breaks -O2 optimization on x86_64-unknown-linux-gnu
- References: <bug-36713-13648@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #6 from dfranke at gcc dot gnu dot org 2008-07-03 10:40 -------
> To simplify your life try if you can reproduce it with -O
> -fstrict-aliasing or with -O2 -fno-tree-pre.
FCFLAGS="-O -fstrict-aliasing" - not reproducable
FCFLAGS="-O2 -fno-tree-pre" - reproducable
FCFLAGS="-O -ftree-pre" - not reproducable
FCFLAGS="-O2 -fno-strict-aliasing" - reproducable
Will do dump comparison next.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36713