(fix commit 46a2411)
See AO_compiler_barrier definition in gcc/generic.h of libatomic_ops.
* include/private/gc_atomic_ops.h [GC_BUILTIN_ATOMIC]
(AO_compiler_barrier): Use __atomic_signal_fence(__ATOMIC_SEQ_CST)
instead of atomic_thread_fence.
# define AO_test_and_set_acquire(p) __atomic_test_and_set(p, __ATOMIC_ACQUIRE)
# define AO_HAVE_test_and_set_acquire
-# define AO_compiler_barrier() __atomic_thread_fence(__ATOMIC_RELAXED)
+# define AO_compiler_barrier() __atomic_signal_fence(__ATOMIC_SEQ_CST)
# define AO_nop_full() __atomic_thread_fence(__ATOMIC_SEQ_CST)
# define AO_HAVE_nop_full