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/* { dg-do compile } */
/* { dg-options "-O2" } */
 
int __sync_fetch_and_add_si (int *, int);
 
inline unsigned int
bar (volatile unsigned int *mem, unsigned int val)
{
  return __sync_fetch_and_add_si((int *)mem, (int)val);
}
 
volatile unsigned int x;
 
void foo (unsigned short *a)
{
  *a = bar (&x, 1) + 1;
}