[Bug tree-optimization/36561] New: store using long array index not hoisted out of loop

[hutchinsonandy at gcc dot gnu dot org]

Testsuite test  gcc.dg/tree-ssa/loop35.c fails for avr target for test3().

This test uses long array index. Tests with int or char index get hoisted as
expected.

void test3(unsigned long b)
{
  unsigned i;

  /* And here.  */
  for (i = 0; i < 100; i++)
    {
      arr[b+8].X += i;
      arr[b+9].X += i;
    }
}

Richard Guenther indicates:
> This is because the alias-oracle for store-motion doesn't handle conversions
> to sizetype well in the offset disambiguation.


-- 
           Summary: store using long array  index not hoisted out of loop
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hutchinsonandy at gcc dot gnu dot org
GCC target triplet: avr-unkown-none


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36561