[Bug tree-optimization/22591] [4.0/4.1 Regression] wrong alias information causes an incorrect redundant load elimination

[rguenth at gcc dot gnu dot org]

------- Additional Comments From rguenth at gcc dot gnu dot org  2005-07-26 
13:10 -------
I have (with whatever load of patches applied...)

;; Function ListSwap (ListSwap)

ListSwap (x, y)
{
  struct Node * tmp;
  struct _Node * D.1292;

<bb 0>:
  tmp = x->next;
  if (tmp != 0B) goto <L0>; else goto <L1>;

<L0>:;
  x->next = y->next;
  y->next = tmp;
  D.1292 = x->next;
  x->prev->next = x;
  D.1292->prev = x;

<L1>:;
  return;

}


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P1                          |P2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22591