re PR c++/20103 (ICE in create_tmp_var with C99 style struct initializer)

re PR c++/20103 (ICE in create_tmp_var with C99 style struct initializer)

	PR c++/20103
	* gimplify.c (gimplify_decl_expr): Do not call gimple_add_tmp_var
	for anonymous variables explicitly declared by front ends.

	PR c++/20103
	* decl.c (cp_make_fname_decl): Don't set DECL_INITIAL to
	error_mark_node to indicate an initialization is OK.
	(start_decl): Likewise.  Adjust call to start_decl_1.
	(start_decl_1): Add initialized parameter.  Simplify.
	* except.c (initialize_handler_parm): Adjust call to
	setart_decl_1.
	(expand_start_catch_block): Let cp_finish_decl initialize catch
	parameters.
	* cp-tree.h (start_decl_1): Adjust prototype.
	* pt.c (tsubst_expr): Don't set DECL_INITIAL to error_mark_node.
	(instantiate_decl): Let cp_finish_decl handle initialization.
	* semantics.c (finish_compound_literal): Create a temporary
	variable for the literal.
	* typeck.c (build_unary_op): Remove COMPOUND_LITERAL_P special
	cases.
	* decl2.c (finish_static_data_member_decl): Don't set
	DECL_INITIAL.
	(grokfield): Do not try to initialize functions.

	PR c++/20103
	* g++.dg/ext/complit6.C: New test.
	* g++.dg/ext/complit3.C: Adjust error markers.
	* g++.dg/init/const3.C: New test.

From-SVN: r114119