Re: Fix pessimistic DImode handling in combine.c:make_field_assignment

[Eric Botcazou]

> 2017-05-24  Richard Sandiford  <richard.sandif...@linaro.org>
> 
> gcc/
>       * combine.c (make_field_assignment): Check len rather than the mode
>       precision when calling force_to_mode.

OK for mainline.

-- 
Eric Botcazou