Detect overflow by atomic functions [PR102453].

Detect overflow by atomic functions [PR102453].

Resolves:
PR middle-end/102453 - buffer overflow by atomic built-ins not diagnosed

gcc/ChangeLog:

	PR middle-end/102453
	* gimple-ssa-warn-access.cc (pass_waccess::check_atomic_builtin): New.
	(pass_waccess::check_atomic_builtin): Call it.

gcc/testsuite/ChangeLog:

	PR middle-end/102453
	* gcc.dg/Warray-bounds-90.c: New test.
	* gcc.dg/Wstringop-overflow-77.c: New test.
	* gcc.dg/Wstringop-overflow-78.c: New test.
	* gcc.dg/Wstringop-overflow-79.c: New test.
	* gcc.dg/Wstringop-overflow-80.c: New test.
	* c-c++-common/gomp/atomic-4.c: Avoid an out-of-bounds access.