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/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-optimized" } */

volatile int count;
int arr[4];
void foo()
{
 arr[count++] = 0;
}

/* { dg-final { scan-tree-dump-times "count =" 1 "optimized"} } */
/* { dg-final { cleanup-tree-dump "optimized" } } */