[Bug tree-optimization/55155] Autovectorization does not use unaligned loads/stores

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55155



--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-10-31 
21:44:20 UTC ---

  <bb 2>:

  _19 = num_prods_6(D) * 16;

  if (_19 != 0)

    goto <bb 4>;

  else

    goto <bb 3>;



  <bb 3>:

  return;



  <bb 4>:

  _16 = ASSERT_EXPR <_19, _19 != 0>;

...

  if (_16 <= 4)

    goto <bb 5>;

  else

    goto <bb 21>;



We should have an assert_expr that _16 is also greater or equal to than 16.



Note this is changing unsigned to __SIZE_TYPE__ so casting does not get in the

way.