[Bug tree-optimization/20084] New: missed optimization with conditional and loads and cross jumping

["pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Like PR 20083 but a slightly different case, in a way this is missed jump crossing.
The following three functions should produce the same assembly code, f2 is the most optimal code.
Right now on the tcb only f1 and f2 are the same.

int f(int *i, int *j, int *l)
{
  int k = 0;
  if (*i)
   k = 1;
  if (*j)
   k = 1;
  if (*l)
    k = 1;
  return k;
}
int f1(int *i, int *j, int *l)
{
  int k = 0;
  if (*i)
   k = 1;
  else if (*j)
   k = 1;
  else if (*l)
   k = 1;
  return k;
}
int f2(int *i, int *j, int *l)
{
  int k = 0;
  if (*i)
   return 1;
  if (*j)
   return 1;
  return (*l)!=0;
}

-- 
           Summary: missed optimization with conditional and loads and cross
                    jumping
           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=20084