On Wed, 8 Mar 2023, Paul Richard Thomas wrote: > Hi All, > > I ran the polyhedron testsuite with the patched gfortran-13.0.1 and 7.4(as > used in the posted Linux test). The timings are comparable except for > rnflow.f90. > > As noted below, rnflow.f90 hangs with the unpatched mainline at -O3 but > runs successfully at -O2. > > I presume that this is a serious regression since it involves optimization?
I believe it has undefined behavior (accessing array out of bounds). > Which component should I post it against? > > Regards > > Paul > > gfortran 13.0.1 with patch > Benchmark Compile Executable Ave Run Number Estim > Name (secs) (bytes) (secs) Repeats Err % > --------- ------- ---------- ------- ------- ------ > ac 0.00 55904 7.28 2 0.0550 > aermod 0.00 1149032 10.32 2 0.0242 > air 0.00 120224 3.57 2 0.3083 > capacita 0.00 110872 20.27 2 0.0765 > channel2 0.00 43928 98.23 2 0.2703 > doduc 0.00 190296 13.86 2 0.2453 > gas_dyn2 0.00 108176 96.77 2 0.1364 > fatigue2 0.00 90752 61.44 2 0.0618 > induct2 0.00 224992 57.71 2 0.0572 > linpk 0.00 47672 5.54 2 0.1806 > mp_prop_desi 0.00 52640 94.50 2 0.0079 > nf 0.00 64480 9.25 2 0.4053 > protein 0.00 136496 20.83 2 0.9096 > rnflow 0.00 181320 3417.15 2 99.8270**** > test_fpu2 0.00 126752 52.35 2 0.1691 > tfft2 0.00 60280 37.61 2 0.9387 > > Geometric Mean Execution Time = 32.72 seconds > ****rnflow hangs without patch as well. Seems to be a rather serious > regression. > gets stuck with -O3 in the loop starting at line 3566 in subroutine cptrf2 > > ================================================================================ > > gfortran7.4 > Benchmark Compile Executable Ave Run Number Estim > Name (secs) (bytes) (secs) Repeats Err % > --------- ------- ---------- ------- ------- ------ > ac 0.00 3612576 7.30 2 0.0205 > aermod 0.00 5204760 10.21 2 0.0784 > air 0.00 3829736 4.05 2 0.0988 > capacita 0.00 3672512 22.25 2 0.1506 > channel2 0.00 3663368 87.22 2 0.5767 > doduc 0.00 3840336 13.60 2 0.0221 > gas_dyn2 0.00 3673920 89.54 2 0.1106 > fatigue2 0.00 3691256 74.34 2 0.0921 > induct2 0.00 4062312 57.87 2 0.1348 > linpk 0.00 3591984 5.59 2 0.0358 > mp_prop_desi 0.00 3966920 93.99 2 0.0654 > nf 0.00 3622112 9.27 2 0.0324 > protein 0.00 3832280 22.10 2 0.1289 > rnflow 0.00 4129984 23.49 2 0.7449 > test_fpu2 0.00 3940944 53.29 2 0.2561 > tfft2 0.00 3622040 36.56 2 0.1026 > > Geometric Mean Execution Time = 24.33 seconds > -- Richard Biener <rguent...@suse.de> SUSE Software Solutions Germany GmbH, Frankenstrasse 146, 90461 Nuernberg, Germany; GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman; HRB 36809 (AG Nuernberg)
