PR c/59940
c-family/
	* c-common.h (unsafe_conversion_p): Adjust declaration.
	(warnings_for_convert_and_check): Likewise.
	(convert_and_check): Likewise.
	* c-common.c (unsafe_conversion_p): Add location parameter.  Call
	expansion_point_location_if_in_system_header on it.
	(warnings_for_convert_and_check): Add location parameter.  Call
	expansion_point_location_if_in_system_header on it.  Use it.
	(convert_and_check): Add location parameter.  Use it.
	(conversion_warning): Likewise.
	(c_add_case_label): Adjust convert_and_check calls.
	(scalar_to_vector): Adjust unsafe_conversion_p calls.
cp/
	* typeck.c (build_ptrmemfunc1): Call convert_and_check with
	input_location.
	* cvt.c (cp_convert_and_check): Call warnings_for_convert_and_check
	with input_location.
	* call.c (build_conditional_expr_1): Call unsafe_conversion_p with
	loc parameter.
c/
	* c-typeck.c (build_function_call_vec): Use loc parameter.
	(convert_arguments): Add location parameter.  Use it.
	(ep_convert_and_check): Likewise.
	(build_atomic_assign): Adjust convert_for_assignment call.
	(build_modify_expr): Likewise.
	(digest_init): Likewise.
	(c_finish_return): Likewise.
	(build_conditional_expr): Adjust ep_convert_and_check calls.
	(convert_for_assignment): Add rhs_loc parameter.  Use it.
	(build_binary_op): Adjust convert_and_check and ep_convert_and_check
	calls.
testsuite/
	* gcc.dg/pr59940.c: New test.
	* gcc.dg/pr35635.c (func3): Move dg-warning.

From-SVN: r207309