re PR c++/48869 (OpenMP task construct fails to instantiate copy constructor(same as Bug 36523))

	PR c++/48869
	* method.c (get_dtor, get_copy_ctor): Add COMPLAIN argument,
	pass it down to locate_fn_flags.
	* cp-tree.h (get_dtor, get_copy_ctor): Adjust prototypes.
	* semantics.c (cxx_omp_create_clause_info): Adjust callers.
	* cp-gimplify.c: Include splay-tree.h.
	(splay_tree_compare_decl_uid, omp_var_to_track,
	omp_cxx_notice_variable): New functions.
	(struct cp_genericize_omp_taskreg): New type.
	(struct cp_genericize_data): Add omp_ctx field.
	(cp_genericize_r): Attempt to determine implicitly determined
	firstprivate class type variables.
	(cp_genericize): Clear omp_ctx.
	* Make-lang.in (cp/cp-gimplify.o): Depend on $(SPLAY_TREE_H).

	* testsuite/libgomp.c++/pr48869.C: New test.

From-SVN: r173888