fold-const.c (extract_muldiv_1): Rename from extract_muldiv; rearrange mult...

fold-const.c (extract_muldiv_1): Rename from extract_muldiv; rearrange mult arguments for less recursion.

        * fold-const.c (extract_muldiv_1): Rename from extract_muldiv;
        rearrange mult arguments for less recursion.
        (extract_muldiv): New.  Prevent runaway recursion.

Co-Authored-By: Richard Henderson <rth@redhat.com>

From-SVN: r62963