PR c++/39371
	* semantics.c (finish_switch_cond): Don't call get_unwidened.
	* decl.c (finish_case_label): Pass SWITCH_STMT_TYPE as 3rd argument
	instead of TREE_TYPE (cond).

	* g++.dg/opt/switch2.C: Add -w to dg-options.
	* g++.dg/warn/Wswitch-1.C: Adjust expected warnings.
	* g++.dg/warn/switch1.C: New test.
	* g++.dg/other/switch3.C: New test.

From-SVN: r144732