[Bug tree-optimization/65961] [6 Regression] ice in vect_is_simple_use_1 with -O3

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65961

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-05-01
                 CC|                            |trippels at gcc dot gnu.org
          Component|c                           |tree-optimization
            Summary|ice in vect_is_simple_use_1 |[6 Regression] ice in
                   |with -O3                    |vect_is_simple_use_1 with
                   |                            |-O3
     Ever confirmed|0                           |1

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
int *a;
void
foo ()
{
  do
    {
      a[16] = (a[1] ^ a[0]) << 1 | a[1];
      a[17] = (a[0] ^ a[1]) << 1 | a[0];
      a[18] = (a[0] ^ a[1]) << 1 | a[0];
      a[19] = (a[0] ^ a[1]) << 1 | a[0];
      a[20] = (a[0] ^ a[1]) << 1 | a[0];
      a[21] = (a[0] ^ a[1]) << 1 | a[0];
      a[22] = (a[0] ^ a[1]) << 1 | a[0];
      a[23] = (a[20] ^ a[1]) << 1 | a[9];
      a += 8;
    }
  while (1);
}