+ else if (last_limit > var->var_part[i].offset)
+ continue;
+ offsets[n_var_parts] = var->var_part[i].offset;
+ loc[n_var_parts] = var->var_part[i].loc_chain->loc;
+ mode = GET_MODE (loc[n_var_parts]);
+ last_limit = offsets[n_var_parts] + GET_MODE_SIZE (mode);
+
+ /* Attempt to merge adjacent registers or memory. */
+ wider_mode = GET_MODE_WIDER_MODE (mode);
+ for (j = i + 1; j < var->n_var_parts; j++)
+ if (last_limit <= var->var_part[j].offset)
+ break;
+ if (j < var->n_var_parts
+ && wider_mode != VOIDmode
+ && GET_CODE (loc[n_var_parts])
+ == GET_CODE (var->var_part[j].loc_chain->loc)
+ && mode == GET_MODE (var->var_part[j].loc_chain->loc)
+ && last_limit == var->var_part[j].offset)
+ {
+ rtx new_loc = NULL;
+ rtx loc2 = var->var_part[j].loc_chain->loc;
+
+ if (REG_P (loc[n_var_parts])
+ && hard_regno_nregs[REGNO (loc[n_var_parts])][mode] * 2
+ == hard_regno_nregs[REGNO (loc[n_var_parts])][wider_mode]
+ && REGNO (loc[n_var_parts])
+ + hard_regno_nregs[REGNO (loc[n_var_parts])][mode]
+ == REGNO (loc2))
+ {
+ if (! WORDS_BIG_ENDIAN && ! BYTES_BIG_ENDIAN)
+ new_loc = simplify_subreg (wider_mode, loc[n_var_parts],
+ mode, 0);
+ else if (WORDS_BIG_ENDIAN && BYTES_BIG_ENDIAN)
+ new_loc = simplify_subreg (wider_mode, loc2, mode, 0);
+ if (new_loc)
+ {
+ if (!REG_P (new_loc)
+ || REGNO (new_loc) != REGNO (loc[n_var_parts]))
+ new_loc = NULL;
+ else
+ REG_ATTRS (new_loc) = REG_ATTRS (loc[n_var_parts]);
+ }
+ }
+ else if (MEM_P (loc[n_var_parts])
+ && GET_CODE (XEXP (loc2, 0)) == PLUS
+ && GET_CODE (XEXP (XEXP (loc2, 0), 0)) == REG
+ && GET_CODE (XEXP (XEXP (loc2, 0), 1)) == CONST_INT)
+ {
+ if ((GET_CODE (XEXP (loc[n_var_parts], 0)) == REG
+ && rtx_equal_p (XEXP (loc[n_var_parts], 0),
+ XEXP (XEXP (loc2, 0), 0))
+ && INTVAL (XEXP (XEXP (loc2, 0), 1))
+ == GET_MODE_SIZE (mode))
+ || (GET_CODE (XEXP (loc[n_var_parts], 0)) == PLUS
+ && GET_CODE (XEXP (XEXP (loc[n_var_parts], 0), 1))
+ == CONST_INT
+ && rtx_equal_p (XEXP (XEXP (loc[n_var_parts], 0), 0),
+ XEXP (XEXP (loc2, 0), 0))
+ && INTVAL (XEXP (XEXP (loc[n_var_parts], 0), 1))
+ + GET_MODE_SIZE (mode)
+ == INTVAL (XEXP (XEXP (loc2, 0), 1))))
+ new_loc = adjust_address_nv (loc[n_var_parts],
+ wider_mode, 0);
+ }
+
+ if (new_loc)
+ {
+ loc[n_var_parts] = new_loc;
+ mode = wider_mode;
+ last_limit = offsets[n_var_parts] + GET_MODE_SIZE (mode);
+ i = j;
+ }
+ }
+ ++n_var_parts;