cgraph offloading error?

[Jeff Law]

On 10/30/2015 04:16 PM, Nathan Sidwell wrote:
> On 10/30/15 14:28, Jeff Law wrote:
>
>> So when we don't use src_reg or dst_mode, we'll get a warning about
>> the unused
>> variable. I guess this is the first port where HARD_REGNO_NREGS is a
>> constant.
>
> Yeah,  I noticed that when first lookingat the port, but as it wasn't
> (apparently) broken ...
It's only fatal with -Wjumble-mumble that gets set by config-list.mk, so 
it could have been easily sneaking by.  Certainly wouldn't affect the 
correctness of the compiler though.

>
>> Second, MOVE_MAX is 4.  That's causing out-of-bounds array access
>> warnings in
>> various places.
>
>> There were a variety of other problems associated with MOVE_MAX being
>> smaller
>> than a word.   If I change MOVE_MAX to 8, then everything is good.
>
> Makes sense.
I find myself wondering if that ought to be explicitly sanity-checked 
somewhere.  I'm sure there's a significant number of invariants for 
ports that we could check at build time and hopefully prevent problems 
of this nature in the future.  Though it may not be worth it..

> Testing attached ...
Cool.  I'll go ahead and add nvptx-elf to the list shortly on the 
assumption this stuff will get fixed on way or another.

Jeff