[Bug tree-optimization/30375] [4.3 Regression] tree-ssa-dse incorrectly removes struct initialization

["belyshev at depni dot sinp dot msu dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #29 from belyshev at depni dot sinp dot msu dot ru  2007-09-26 09:31 -------
Another testcase:

/* { dg-do run } */
/* { dg-options "-O1 --param max-aliased-vops=0" } */

struct T
{
  int a, b;
} t;

__attribute__((noinline)) struct T *f (struct T *p)
{
  struct T *q = __builtin_malloc (sizeof (struct T));
  *q = *p;
  return q;
}

int main (void)
{
  struct T *p;

  t.a = 1;
  t.b = 2;
  p = f (&t);
  t.a = 3;

  if (p->a != 1)
    __builtin_abort ();

  return 0;
}


-- 

belyshev at depni dot sinp dot msu dot ru changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |belyshev at depni dot sinp
                   |                            |dot msu dot ru


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30375