gcc/testsuite/gcc.target/powerpc/pr58330.c

   1 /* { dg-do compile { target { powerpc*-*-* } } } */
   2 /* { dg-require-effective-target lp64 } */
   3 /* { dg-options "-O -mno-popcntb" } */
   4 /* { dg-final { scan-assembler-not "stwbrx" } } */
   5
   6 void
   7 write_reverse (unsigned long *addr, unsigned long val)
   8 {
   9   unsigned long reverse = __builtin_bswap64 (val);
  10   __atomic_store_n (addr, reverse, __ATOMIC_RELAXED);
  11 }