[Bug testsuite/69007] [6 regression] test cases gcc.dg/vect/vect-reduc-dot-s8a.c fails starting with r231815

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69007

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
          Component|target                      |testsuite
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.  Probably the change that would make two patterns at the same stmt
unrecognizable and

static vect_recog_func vect_vect_recog_func_ptrs[NUM_PATTERNS] = {
      { vect_recog_widen_mult_pattern, "widen_mult" },
      { vect_recog_widen_sum_pattern, "widen_sum" },
      { vect_recog_dot_prod_pattern, "dot_prod" },

which means widen_sum should be only after dot_prod detection.  Maybe you
can verify if swapping them passes testing on power (until I get to this
myself).