libagx: add missing null pointer check
fixes KHR-GL46.pipeline_statistics_query_tests_ARB.functional_tess_queries
with hard fault
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33682>
diff --git a/src/asahi/libagx/tessellation.cl b/src/asahi/libagx/tessellation.cl
index 4727532..86e67a2 100644
--- a/src/asahi/libagx/tessellation.cl
+++ b/src/asahi/libagx/tessellation.cl
@@ -192,7 +192,9 @@
*vertex_output_buffer_ptr = (uintptr_t)(blob + vb_offs);
p->counts = (global uint32_t *)(blob + count_offs);
- ia->verts_per_instance = count;
+ if (ia) {
+ ia->verts_per_instance = count;
+ }
/* If indexing is enabled, the third word is the offset into the index buffer
* in elements. Apply that offset now that we have it. For a hardware
