gcc-4.9/gcc/testsuite/gcc.dg/pr18241-3.c


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/* { dg-do run } */
/* { dg-options "-O1" } */ 

void abort (void);

void radix_tree_tag_clear (int *node)
{
	int *path[2], **pathp = path, height;
	volatile int *addr;
	
	height = 1;
	pathp[0] = node;
	
	while (height > 0) {
		pathp[1] = pathp[0];
		pathp++;
		height--;
	}
	
	addr = pathp[0];
	*addr = 1;
}

int main ()
{
	int n;
	radix_tree_tag_clear (&n);
	if (n != 1)
		abort ();
	return 0;
}