alpha.c (alpha_expand_block_move): Initialize src_align and dst_align in bits.

alpha.c (alpha_expand_block_move): Initialize src_align and dst_align in bits.

        * config/alpha/alpha.c (alpha_expand_block_move): Initialize
        src_align and dst_align in bits.  Do unaligned quadword loads
        if possible for BWX too.
        (alpha_expand_block_clear): Initialize align in bits.  Track
        small leading offsets into a larger alignment.  Play games with
        stq_u for large 4-byte aligned blocks.  Use load/mask/store
        for appropreately aligned heads and tails.

From-SVN: r38532