static inline int clz32(unsigned long val)
{
	return val ? __builtin_clz(val) : 32;
}

int fls(int value)
{
	return 32 - clz32(value);
}

unsigned foo(unsigned max, unsigned size)
{
	if (size > max)
		size = max;
	if (size & (size - 1))
		size = 1 << (fls(size) - 1);
	return size;
}

int main(void)
{
	unsigned i, l, max;
	volatile val;

	for (i = 0; i < 100000000; i++) {
		for (max = 1; max <= 8; max <<= 1) {
			for (l = 1; l <= 8; l++)
				val = foo(max, l);
		}
	}
	return 0;
}