vrp2.c

来自「linux下编程用 编译软件」· C语言 代码 · 共 21 行

/* { dg-do run } */
/* { dg-options "-O2" } */

/* VRP was miscompiling the following as it thought &a->b was a dereference
   and therfore a was non-null.  
   Reduced from Mozilla by Serge Belyshev <[e-mail]>.  */

extern "C" void abort (void);
struct T { int i; } t;
struct A : T { int j; } *p = __null;

int main (void)
{
  if (p == &t)
    return 0;
  if (p)
    abort ();
  return 0;
}