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Subject: [Bug middle-end/40022] 4.4 regression breaks "reply to all" in alpine
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------- Comment #6 from jakub at gcc dot gnu dot org  2009-05-05 09:02 -------
Reduced testcase:
extern void abort (void);

struct A
{
  struct A *a;
};

struct B
{
  struct A *b;
};

__attribute__((noinline))
struct A *
foo (struct A *x)
{
  asm volatile ("" : : "g" (x) : "memory");
  return x;
}

__attribute__((noinline))
void
bar (struct B *w, struct A *x, struct A *y, struct A *z)
{
  struct A **c;
  c = &w->b;
  *c = foo (x);
  while (*c)
    c = &(*c)->a;
  *c = foo (y);
  while (*c)
    c = &(*c)->a;
  *c = foo (z);
}

struct B d;
struct A e, f, g;

int
main (void)
{
  f.a = &g;
  bar (&d, &e, &f, 0);
  if (d.b == 0
      || d.b->a == 0
      || d.b->a->a == 0
      || d.b->a->a->a != 0)
    abort ();
  return 0;
}

Looking into it.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-05-05 09:02:11
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40022