re PR debug/34037 (Bounds for VLAs not emitted into debuginfo)

	PR debug/34037
	* gimplify.c (gimplify_type_sizes): When not optimizing, ensure
	TYPE_MIN_VALUE and TYPE_MAX_VALUE is not is not DECL_IGNORED_P
	VAR_DECL.
	* cfgexpand.c (expand_used_vars): Keep DECL_ARTIFICIAL
	!DECL_IGNORED_P vars in local_decls list for instantiate_decls,
	ggc_free other TREE_LIST nodes from that chain.
	* function.c (instantiate_decls): Instantiate also DECL_RTL
	of vars in cfun->local_decls, free that list afterwards.

From-SVN: r140459