[Bug other/80946] New: [8 regression] test cases gfortran.dg/vect/vect-2.f90 and gfortran.dg/vect/vect-5.f90 fail starting with r247544

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80946

            Bug ID: 80946
           Summary: [8 regression] test cases gfortran.dg/vect/vect-2.f90
                    and gfortran.dg/vect/vect-5.f90 fail starting with
                    r247544
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at gcc dot gnu.org
  Target Milestone: ---

This is split from the earlier pr
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80618


make -k check-fortran RUNTESTFLAGS=vect.exp=gfortran.dg/vect/vect-2.f90
. . .
spawn /home/seurer/gcc/build/gcc-test/gcc/testsuite/gfortran9/../../gfortran
-B/home/seurer/gcc/build/gcc-test/gcc/testsuite/gfortran9/../../
-B/home/seurer/gcc/build/gcc-test/powerpc64le-unknown-linux-gnu/./libgfortran/
/home/seurer/gcc/gcc-test/gcc/testsuite/gfortran.dg/vect/vect-2.f90
-fno-diagnostics-show-caret -fdiagnostics-color=never -O -O2 -ftree-vectorize
-fvect-cost-model=unlimited -fdump-tree-vect-details -maltivec -mpower8-vector
-S -o vect-2.s
PASS: gfortran.dg/vect/vect-2.f90   -O  (test for excess errors)
PASS: gfortran.dg/vect/vect-2.f90   -O   scan-tree-dump-times vect "vectorized
3 loops" 1
FAIL: gfortran.dg/vect/vect-2.f90   -O   scan-tree-dump-times vect "Alignment
of access forced using peeling" 3
FAIL: gfortran.dg/vect/vect-2.f90   -O   scan-tree-dump-times vect "Vectorizing
an unaligned access" 2


make -k check-fortran RUNTESTFLAGS=vect.exp=gfortran.dg/vect/vect-5.f90
. . .
PASS: gfortran.dg/vect/vect-5.f90   -O  execution test
PASS: gfortran.dg/vect/vect-5.f90   -O   scan-tree-dump-times vect "vectorized
1 loops" 1
FAIL: gfortran.dg/vect/vect-5.f90   -O   scan-tree-dump-times vect "Alignment
of access forced using peeling" 1
FAIL: gfortran.dg/vect/vect-5.f90   -O   scan-tree-dump-times vect "Vectorizing
an unaligned access" 1


Note that this is *not* related to this pr: 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80925

The test cases were failing in the revision (r248677) prior to the one that
triggered pr80925 (r248678).