* alpha.c (alpha_expand_unaligned_load): Use expand_binop properly.
        Make sure result winds up in TGT.
        (alpha_expand_unaligned_store): Use expand_binop properly.  Allow
        src to be other than DImode.
        (alpha_expand_unaligned_load_words): Tidy.  Take an offset argument.
        (alpha_expand_unaligned_store_words): Likewise.
        (alpha_expand_block_move): Use REGNO_POINTER_ALIGN.  Restructure so
        that source and destination are separately optimized for alignment.
        (alpha_expand_block_clear): Use REGNO_POINTER_ALIGN.

From-SVN: r17565