| Message ID | 20100930224429.GA359@bromo.med.uc.edu |
|---|---|
| State | New |
| Headers | show |
On Thu, Sep 30, 2010 at 17:44, Jack Howarth <howarth@bromo.med.uc.edu> wrote: > On Thu, Sep 30, 2010 at 05:18:03PM -0500, Sebastian Pop wrote: >> On Thu, Sep 30, 2010 at 17:04, Jack Howarth <howarth@bromo.med.uc.edu> wrote: >> > What are the prospects for getting PR40979 fixed? >> >> > PR40979: induct benchmark 60% slower when compiled with -fgraphite-identity >> >> Is this still a problem? Could you try to measure the perf with trunk? >> >> Thanks, >> Sebastian > > Sebastian, > > gfortran -ffast-math -funroll-loops -msse3 -O3 induct.f90 -o induct > time ./induct > 20.290u 0.029s 0:20.37 99.7% 0+0k 0+1io 0pf+0w > > gfortran -ffast-math -funroll-loops -msse3 -O3 -fno-graphite-identity induct.f90 -o induct > time ./induct > 12.761u 0.025s 0:12.78 100.0% 0+0k 0+0io 0pf+0w > grep "LOOP VECTORIZED" foo | wc 8 32 320 grep "LOOP VECTORIZED" foo.graphite | wc 4 16 160 Looks like we still have 4 loops not vectorized with -fgraphite-identity. Thanks Jack for pointing this to me. Sebastian
Index: gcc/opts.c =================================================================== --- gcc/opts.c (revision 164815) +++ gcc/opts.c (working copy) @@ -804,6 +804,9 @@ /* -O2 optimizations. */ opt2 = (optimize >= 2); +#ifdef HAVE_cloog + flag_graphite_identity = opt2; +#endif flag_inline_small_functions = opt2; flag_indirect_inlining = opt2; flag_partial_inlining = opt2;