gcc/testsuite/gcc.dg/ia64-sync-4.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target sync_int_long } */
   3 /* { dg-options "-O2 -finline-functions" } */
   4 /* { dg-options "-march=i486" { target { { i?86-*-* x86_64-*-* } && ilp32 } } } */
   5
   6 /* Test inlining __sync_bool_compare_and_swap.  */
   7
   8 #include <stdbool.h>
   9
  10 static bool
  11 compare_and_swap(long *addr, long old, long new_val)
  12 {
  13   return __sync_bool_compare_and_swap(addr, old, new_val);
  14 }
  15
  16 void
  17 foo (long *address)
  18 {
  19   long he_address = *address & ~1;
  20   while (!compare_and_swap(address, he_address, he_address | 1))
  21     he_address = *address & ~1;
  22 }