gcse.c (struct reg_set): Store the block index where the register was set rather than the setting insn.

        * gcse.c (struct reg_set): Store the block index where the register
        was set rather than the setting insn.
        (record_one_set, compute_transp): Corresponding changes.
        (pre_insert_copy_insn): Do not call replace_one_set.
        (replace_one_set): Remove.

From-SVN: r94591