re PR target/32433 (Code for __builtin_ffs does not benefit from compiler optimizations)

        PR target/32433
        * config/i386/i386.md (ffssi2): Expand as ffs_cmove for TARGET_CMOVE.
        (ffs_cmove): New expander to expand using ctz pattern.
        (*ffs_cmove): Remove pattern.
        (*ffs_no_cmove): Enable only for !TARGET_CMOVE.
        (ffsdi2): Expand using ctz pattern.
        (*ffs_rex64): Remove pattern.

From-SVN: r126154