[Bug tree-optimization/102467] New: Missed SLP discovery for gathers

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102467

            Bug ID: 102467
           Summary: Missed SLP discovery for gathers
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

void foo (double * __restrict a, long * __restrict b, double * c)
{
  for (int i = 0; i < 1024; ++i)
    {
      a[2*i] = c[b[2*i]];
      a[2*i + 1] = c[b[2*i + 1]];
    }
}

is not SLP vectorized.