gcc/testsuite/gcc.dg/20040123-1.c

/* { dg-do compile } */
/* { dg-options "-O2" } */
/* { dg-final { scan-assembler "abort" } } */

extern void abort (void);
extern char a[];

void foo (void)
{
  if ((void *) a == (void *) 0x4000UL)
    abort ();
}