1 typedef unsigned short __be16;
2 typedef unsigned short __u16;
3 typedef unsigned short u16;
4 #define __force
5 
6 #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
7 /* the test behaves as though it's always on a little-endian machine */
8 #define __cpu_to_be16(x) ((__force __be16)__swab16((x)))
9 #define ___htons(x) __cpu_to_be16(x)
10 #define htons(x) ___htons(x)
11 
12 #define ETH_P_IPV6 0x86DD
13 
14 static u16 protocol;
15 
test(void)16 static void test(void)
17 {
18 	switch (protocol) {
19 	case htons(ETH_P_IPV6):
20 		break;
21 	}
22 }
23 
24 /*
25  * check-name: constant folding in bswap builtins
26  * check-error-start
27  * check-error-end
28  */
29