gc: fix msvc not using libatomic_ops (#15418)

thirdparty/libatomic_ops/atomic_ops/sysdeps/gcc/tile.h

@@ -0,0 +1,48 @@
+/*
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+
+/* Minimal support for tile.    */
+
+#if (AO_GNUC_PREREQ(4, 8) || AO_CLANG_PREREQ(3, 4)) \
+    && !defined(AO_DISABLE_GCC_ATOMICS)
+
+# include "generic.h"
+
+#else /* AO_DISABLE_GCC_ATOMICS */
+
+# include "../all_atomic_load_store.h"
+
+# include "../test_and_set_t_is_ao_t.h"
+
+  AO_INLINE void
+  AO_nop_full(void)
+  {
+    __sync_synchronize();
+  }
+# define AO_HAVE_nop_full
+
+  AO_INLINE AO_t
+  AO_fetch_and_add_full(volatile AO_t *p, AO_t incr)
+  {
+    return __sync_fetch_and_add(p, incr);
+  }
+# define AO_HAVE_fetch_and_add_full
+
+  AO_INLINE AO_t
+  AO_fetch_compare_and_swap_full(volatile AO_t *addr, AO_t old_val,
+                                 AO_t new_val)
+  {
+    return __sync_val_compare_and_swap(addr, old_val, new_val
+                                       /* empty protection list */);
+  }
+# define AO_HAVE_fetch_compare_and_swap_full
+
+#endif /* AO_DISABLE_GCC_ATOMICS */