1 /* { dg-do compile } */ 2 /* { dg-options "-O2" } */ 3 /* { dg-final { scan-assembler-not "bswapdi2" } } */ 4 foo(long long x)5 long long foo (long long x) 6 { 7 return __builtin_bswap64 (x); 8 } 9 10