Created attachment 104687 [details]
Bug repro program source file
I gave a shot to opencl support on my evergreen card (cedar) with mesa git.
I noticed that with an empty kernel the program crash with:
evergreen_state.c:1827:evergreen_emit_vertex_buffers: Assertion `rbuffer' failed.
I made a little debugging and I think that this is du to a bug in evergreen_init_compute_state_functions from evergreen_compute.c .
The two concerned lines are
/* We always use at least one vertex buffer for parameters (id = 1)*/
ctx->cs_vertex_buffer_state.dirty_mask = 0x2;
With an empty kernel there is in fact no vertex buffer used as far as I can see.
By changing the two lines to
ctx->cs_vertex_buffer_state.dirty_mask = 0x0;
It doesn't crash for me anymore.
However I am a total driver development noob so my interpretation (and therefore fix) can be wrong.
You can find attacted the very small program to be able to cause the crash.
Created attachment 104927 [details] [review]
Can you try this patch?
Fix the bug for me :)
Thank you for giving a look at this bug!
Fixed in git commit commit bf7a60f41d897be4d9804ba7c46633e38501ffe7
on Feb 28, 2017 at 05:27:38.
(provided by the Example extension).