* fold-const.c (fold_binary): When comparing two simple ADDR_EXPR

        expressions, test their _DECL operands for pointer equality rather
        than using operand_equal_p.

        * gcc.dg/tree-ssa/pr22321.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@101974 138bc75d-0d04-0410-961f-82ee72b054a4