Hello! > >> This is using the Polyhedron Fortran test. >> http://www.polyhedron.co.uk/MFL6VW74649 > >> Using several options, the gas_dyn test got much slower; however, with >> some options, the performance remained roughly the same. >> In terms of the geometric mean, it is a slowdown of around 1%. >> The run time of the other programs only changed slightly (up/down/const). > > >> Result from http://www.suse.de/~gcctest/c++bench/polyhedron/ >> -ffast-math -funroll-loops -O3 -ftree-vectorize -march= ??? (opteron I >> think). >> 14.59s -> 21.06s (44% slower) > > >> Result on for my AMD Athlon64 4800+, >> http://physik.fu-berlin.de/~tburnus/gcc-trunk/benchmark/ >> Yesterday: 2007-09-10-r128322 >> Today: 2007-09-11-r128363 > >The problem was introduced by r128353 [1]:
Sorry, this is fixed by Ira's patch at http://gcc.gnu.org/ml/gcc-patches/2007-09/msg00966.html The new times are: NV V-no-cm V-cm 15.85 11.02 11.14 There is a small regression introduced by the cost model now. This should get fixed as we tune the costs some more in stage 3. Thanks, Harsha
