On 05/04/16 12:16, Tom de Vries wrote:
> On 24/03/16 17:59, Tom de Vries wrote:
>> Hi,
>>
>> This patch fixes an incorrect warning for the oacc copy clause.
>>
>> Consider this test-case:
>> ...
>> void
>> foo (void)
>> {
>>    int i;
>>
>> #pragma acc kernels
>>    {
>>      i = 1;
>>    }
>> }
>> ...
>>
>>
>> When compiling with -fopenacc -Wuninitialized, we get an 'is used
>> uninitialized' warning for variable 'i', which is confusing given that
>> 'i' is not used, but only set in the kernels region.
>>
>> The warning occurs because there's an implicit copy(i) clause on the
>> kernels region, and that copy generates a read of i before the region,
>> and a write to i in region.
>>
>> The patch silences the warning by marking the variable in the copy
>> clause with TREE_NO_WARNING.
>>
>> Build and reg-tested with goacc.exp, gomp.exp and target-libgomp.
>>
>> OK for trunk if bootstrap and reg-test succeeds?
>>
>
> Ping.
>

Committed as attached, with only the testcases. The code change has been 
committed as part of the fix for PR70550.

Thanks,
- TOm