[Bug target/80083] New: libgomp doacross2.f90 regtest fails with -mcpu=power9 -O1

[acsawdey at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80083

            Bug ID: 80083
           Summary: libgomp doacross2.f90 regtest fails with -mcpu=power9
                    -O1
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: acsawdey at gcc dot gnu.org
                CC: meissner at gcc dot gnu.org, wschmidt at gcc dot gnu.org
  Target Milestone: ---
            Target: powerpc64*-*-* power9

This regression test fails but only with -O1 -mcpu=power9. Adding
-mno-vsx-small-integer makes it work but I don't know if that's just because it
perturbs the problem.