[gomp4 00/14] NVPTX: further porting

[Alexander Monakov]

On Thu, 22 Oct 2015, Bernd Schmidt wrote:

> I'm not really familiar with OpenMP and what it allows, so take all my
> comments with a grain of salt.
> 
> On 10/22/2015 06:41 PM, Alexander Monakov wrote:
> > The second approach is to run all threads in the warp all the time, making
> > sure they execute the same code with the same data, and thus build up the
> > same
> > local state.
> 
> But is that equivalent? If each thread takes the address of a variable on its
> own stack, that's not the same as taking an address once and broadcasting it.

Taking the address yields the same pointer in all threads in PTX.  Even if it
didn't, broadcasting the pointer is pointless, as stacks are thread-private.

Alexander