| /* { dg-do run } */ |
| /* { dg-require-effective-target int128 } */ |
| /* { dg-require-effective-target stdint_types } */ |
| /* { dg-options "-O" } */ |
| |
| #include <stdint.h> |
| |
| typedef union |
| { |
| struct { uint64_t lo; uint64_t hi; } s; |
| __uint128_t n; |
| } u; |
| |
| int |
| main (void) |
| { |
| /* Test constant folding. */ |
| extern void link_error (void); |
| |
| const u U1 = { .s = { 0x1122334455667788ULL, 0xffffffffffffffffULL } }; |
| const u U2 = { .s = { 0xffffffffffffffffULL, 0x8877665544332211ULL } }; |
| |
| if (__builtin_bswap128 (U1.n) != U2.n) |
| link_error (); |
| |
| return 0; |
| } |
