> Thanks.  Installed on the trunk.

Well, no, that will be problematic for some architectures.  The history of 
this piece of code is complicated and it's admittedly lacking a comment, but 
the purpose of the block is clear enough:

        op0 = expand_expr (base, NULL_RTX, VOIDmode, EXPAND_SUM);
        op0 = memory_address_addr_space (address_mode, op0, as);
        if (!integer_zerop (TREE_OPERAND (exp, 1)))
          {
            rtx off
              = immed_double_int_const (mem_ref_offset (exp), address_mode);
            op0 = simplify_gen_binary (PLUS, address_mode, op0, off);
          }
        op0 = memory_address_addr_space (mode, op0, as);

The offset computation is done in address_mode and then, only at the end, 
converted to mode.

-- 
Eric Botcazou

Reply via email to