re PR testsuite/32014 (new gcc failures)

        PR testsuite/32014
        * config/rs6000/altivec.md (UNSPEC_VUPKHS_V4SF, UNSPEC_VUPKLS_V4SF):
        (UNSPEC_VUPKHU_V4SF, UNSPEC_VUPKLU_V4SF): New.
        (vec_unpacks_float_hi_v8hi, vec_unpacks_float_lo_v8hi): New patterns.
        (vec_unpacku_float_hi_v8hi, vec_unpacku_float_lo_v8hi): New patterns.

From-SVN: r126361