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[Bug middle-end/40979] induct benchmark 60% slower when compiled with -fgraphite-identity
- From: "spop at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 12 Aug 2009 14:58:31 -0000
- Subject: [Bug middle-end/40979] induct benchmark 60% slower when compiled with -fgraphite-identity
- References: <bug-40979-11113@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #1 from spop at gcc dot gnu dot org 2009-08-12 14:58 -------
Still fails on my machine, on rev150694.
~/gcc/svn/trunk/usr/bin/gfortran -ffast-math -funroll-loops -msse3 -O3
induct.f90 -o induct
time ./induct
real 0m16.596s
user 0m16.393s
sys 0m0.076s
~/gcc/svn/trunk/usr/bin/gfortran -fgraphite-identity -ffast-math -funroll-loops
-msse3 -O3 induct.f90 -o induct
time ./induct
real 0m25.740s
user 0m25.634s
sys 0m0.084s
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40979