[testsuite] Add missing dg-require-effective-target alloca to gcc testsuite

[Tom de Vries]

On 23/03/17 17:24, Thomas Schwinge wrote:
> Hi Tom!
>
> On Thu, 23 Mar 2017 16:46:19 +0100, Tom de Vries <Tom_deVries@mentor.com> wrote:
>> I've run the gcc testsuite for target nvptx-none and ran into "test for
>> excess errors" FAILs due to:
>> ...
>> sorry, unimplemented: target cannot support alloca.
>> ...
>>
>> This patch marks those testcases as requiring alloca.
>
> Thanks!
>
>> OK for trunk for stage1?
>
> Wouldn't this be good "as obvious" for trunk, right now?  (Or are there
> any potential worries?)
>

I suppose you're right we could classify this as obvious.

I'm not sure about "right now" though, given that we're in stage4 and 
this is neither a regression fix nor a documentation fix.

Thanks,
- Tom