[Bug tree-optimization/104240] New: SLP discovery does not consider swapping comparisons

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104240

            Bug ID: 104240
           Summary: SLP discovery does not consider swapping comparisons
           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: ---

The following testcase is not vectorized because of a < vs > operation
mismatch.

void foo (int *c, float *x, float *y)
{
  c[0] = x[0] < y[0];
  c[1] = y[1] > x[1];
  c[2] = x[2] < y[2];
  c[3] = x[3] < y[3];
}