[Bug target/70033] New: PowerPC power9 tests don't have guard for power9 support

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70033

            Bug ID: 70033
           Summary: PowerPC power9 tests don't have guard for power9
                    support
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: meissner at gcc dot gnu.org
  Target Milestone: ---

The new tests for initial power9 (ISA 3.0) functionality are not properly
guarded to make sure the compiler enables power9 support with:
/* { dg-require-effective-target powerpc_p9vector_ok } */

The following tests are affected:
gcc.target/powerpc/p9-lxvx-stxvx-1.c
gcc.target/powerpc/p9-lxvx-stxvx-2.c
gcc.target/powerpc/p9-lxvx-stxvx-3.c
gcc.target/powerpc/p9-permute.c
gcc/testsuite/gcc.target/powerpc/cpu-builtin-1.c