[Mesa-dev] [PATCH] r600: don't emit atomic save if we have no atomic counters.

[Gert Wollny]

Obviously, you can now disregard my other email about the performance
regression, this fixes it. 

Tested-By: Gert Wollny <gw.fossdev at gmail.com>

Best wishes, 


Am Freitag, den 10.11.2017, 13:47 +1000 schrieb Dave Airlie:
> From: Dave Airlie <airlied at redhat.com>
> 
> Otherwise we end up emitting the fence.
> 
> Signed-off-by: Dave Airlie <airlied at redhat.com>
> ---
>  src/gallium/drivers/r600/evergreen_state.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/src/gallium/drivers/r600/evergreen_state.c
> b/src/gallium/drivers/r600/evergreen_state.c
> index c1d13fd..30819ae 100644
> --- a/src/gallium/drivers/r600/evergreen_state.c
> +++ b/src/gallium/drivers/r600/evergreen_state.c
> @@ -4634,6 +4634,9 @@ void evergreen_emit_atomic_buffer_save(struct
> r600_context *rctx,
>  	unsigned reloc;
>  
>  	mask = *atomic_used_mask_p;
> +	if (!mask)
> +		return;
> +
>  	while (mask) {
>  		unsigned atomic_index = u_bit_scan(&mask);
>  		struct r600_shader_atomic *atomic =
> &combined_atomics[atomic_index];