PR objc/43061
        * cgraphunit.c (process_function_and_variable_attributes): Check
	DECL_PRESERVE_P instead of looking up attribute "used".
        * ipa-pure-const.c (check_decl): Likewise.
        * ipa-reference.c (has_proper_scope_for_analysis): Likewise.
        * ipa-type-escape.c (has_proper_scope_for_analysis): Likewise.
        * config/sol2.c (solaris_insert_attributes): Set DECL_PRESERVE_P
        instead of attribute "used".
        * config/sol2-c.c (solaris_pragma_init): Likewise.
        (solaris_pragma_fini): Likewise.

From-SVN: r156907