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[Bug fortran/35418] [4.4 Regression]: Revision 132592 miscompiles 172.mgrid
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 2 Mar 2008 11:00:29 -0000
- Subject: [Bug fortran/35418] [4.4 Regression]: Revision 132592 miscompiles 172.mgrid
- References: <bug-35418-682@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #7 from rguenth at gcc dot gnu dot org 2008-03-02 11:00 -------
Note the COND_EXRPs will be lowered to control-flow while the MAX_EXPRs will
retain a single BB. Still, on i686 the exactly same inner loop IL is created.
And btw I don't see mgrid miscomparing on our tester that runs with -O3 vs.
-O3 -funroll-loops -fpeel-loops -ffast-math. But indeed the other tester
with -O2 -ffast-math vs. -O2 -ffast-math with FDO miscompares since Feb. 25
(not so with 32bit or on IA64 though).
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35418