[Bug tree-optimization/18813] New: not vectorizing obvious loop

[pinskia at gcc dot gnu dot org]

We cannot vectorize the following loop because the "number of iterations cannot be computed".

int f(int *s, int *e)
{
  while ( s < e )  *s++ = 0;
}

This acutally shows up in SPEC (gap).

-- 
           Summary: not vectorizing obvious loop
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18813