Re: [gomp4] Worker-single predication

[Cesar Philippidis <cesar@codesourcery.com>]

On 06/01/2015 08:58 AM, Bernd Schmidt wrote:
> This extends the previous vector-single support to also handle
> worker-level predication. We can't use the shfl insn because workers
> will live across multiple warps, so we use a location in memory to
> broadcast the branch target.
> This also fixes the oversight where basic blocks inside a parallel
> region but outside all loops weren't being predicated.
> 
> A special case is added for worker-single vector-partitioned; we add a
> jump over the entire loop that is taken by the inactive workers and add
> no predication inside this loop.
> 
> Committed on gomp-4_0-branch.

Thanks. This fixed the problems that I was seeing with variables outside
of acc loops.

I see that calls are being predicated at the moment. Those will need
special handling once we tackle acc routines.

Cesar