Re: [og7] vector_length extension part 2: Generalize state propagation and synchronization

[Tom de Vries <Tom_deVries at mentor dot com>]

On 03/02/2018 05:55 PM, Cesar Philippidis wrote:
> +  if (cfun->machine->sync_bar)
> +    fprintf (file, "\t\tadd.u32\t\t%%r%d, %%tidy, 1; "
> +	     "// vector synchronization barrier\n",
> +	     REGNO (cfun->machine->sync_bar));

I realize that atm we don't support large vector length when nesting a 
vector loop inside a worker loop, but ... if we did support that, and 
used a vector_length of 64, then with the "Maximum number of threads per 
block" of 1024 we have a possible 16 workers. And when using the maximum 
number of workers, we'll end up using logical barrier 16 (while we only 
have 0..15).

It would be good to have at least an assert detecting this situation.

Thanks,
- Tom