[Bug target/84902] New: 549.fotonik3d_r from SPEC2017 fails verification with -Ofast -march=native on Zen since r258518

["marxin at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84902

            Bug ID: 84902
           Summary: 549.fotonik3d_r from SPEC2017 fails verification with
                    -Ofast -march=native on Zen since r258518
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: jkoval at gcc dot gnu.org
            Blocks: 26163
  Target Milestone: ---

I see following miscomparison:

running commands in inputgen.cmd 1 times
runs started at         1521207795, 636877000, Fri Mar 16 14:43:15 2018
run 1 started at        1521207795, 636898000, Fri Mar 16 14:43:15 2018
child started: 0,       1521207795, 636903000, pid=30449,
'/home/marxin/Programming/spec2017/bin/specxz -dc OBJ.dat.xz > OBJ.dat 2>>
OBJ.dat.gen.err'
child finished: 0,      1521207795, 734527000, sec=0, nsec=97624000, pid=30449,
rc=0
run 1 finished at:      1521207795, 734539000, Fri Mar 16 14:43:15 2018
run 1 elapsed time:              0, 097641000, 0.097641000
runs finished at        1521207795, 734561000, Fri Mar 16 14:43:15 2018
runs elapsed time:               0, 097684000, 0.097684000
specinvoke exit: rc=0

****************************************
****************************************
Contents of pscyee.out
****************************************
 POWER = 
  2.13245044634327E-42  2.18335817864374E-42  2.23536714661881E-42
 2.28848954325784E-42  2.34273492068948E-42  2.39811037362244E-42
 2.45462082938153E-42  2.51226943651830E-42  2.57105803986167E-42
 2.63098772608779E-42  2.69205942058956E-42  2.75427451375589E-42
 2.81763549285857E-42  2.88214655468550E-42  2.94781417392922E-42
 3.01464760317226E-42  3.08265928211053E-42  3.15186513638627E-42
 3.22228474999077E-42  3.29394139953691E-42  3.36686194365177E-42
 3.44107656613199E-42  3.51661837714837E-42  3.59352288247325E-42
 3.67182733621929E-42  3.75156999770401E-42  3.83278931758194E-42
 3.91552308212080E-42  3.99980754727110E-42  4.08567659584874E-42
 4.17316095161727E-42  4.26228748325843E-42  4.35307862914409E-42
 4.44555197050035E-42  4.53971997607133E-42  4.63558993586830E-42
 4.73316409520551E-42  4.83243999318331E-42  4.93341100232309E-42
 5.03606705845099E-42  5.14039556244574E-42  5.24638242839164E-42
 5.35401324628705E-42  5.46327452200919E-42  5.57415495295979E-42
 5.68664669491003E-42  5.80074657417463E-42  5.91645719947773E-42
 6.03378792976593E-42  6.15275565776239E-42  6.27338537416162E-42
 6.39571048389881E-42  6.51977285369908E-42  6.64562257887563E-42
 6.77331746681349E-42  6.90292224442983E-42  7.03450750679656E-42
...


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)