gcc/c-family/ChangeLog:

	PR c++/71675
	* c-common.c (resolve_overloaded_builtin): Avoid converting
	__atomic_compare_exchange_n return type to that of what its
	first argument points to.

gcc/testsuite/ChangeLog:

	PR c++/71675
	* g++.dg/ext/atomic-3.C: New test.
	* gcc.dg/atomic/pr71675.c: New test.

From-SVN: r238664