* tree.c (free_lang_data_in_one_sizepos): New inline function.
	(free_lang_data_in_type): Call it on TYPE_{MIN|MAX}_VALUE of numerical
	types.  Call it on TYPE_SIZE and TYPE_SIZE_UNIT of all types.
	(free_lang_data_in_decl): Call it on DECL_SIZE and DECL_SIZE_UNIT of
	all decls.  Call it on DECL_FIELD_OFFSET of fields.
	(find_decls_types_r): Follow DECL_VALUE_EXPR.
	(iterative_hash_expr) <PLACEHOLDER_EXPR>: New case.

From-SVN: r159039