gallivm/draw: calloc prim id toavoid undef

Otherwise masked off channels can access random bad memory

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4560>

diff --git a/src/gallium/auxiliary/draw/draw_gs.c b/src/gallium/auxiliary/draw/draw_gs.c
index 9cfec4d..0cbead3 100644 (file)
--- a/src/gallium/auxiliary/draw/draw_gs.c
+++ b/src/gallium/auxiliary/draw/draw_gs.c
@@ -880,7 +880,7 @@ draw_create_geometry_shader(struct draw_context *draw,
 
       gs->llvm_emitted_primitives = align_malloc(vector_size * PIPE_MAX_VERTEX_STREAMS, vector_size);
       gs->llvm_emitted_vertices = align_malloc(vector_size * PIPE_MAX_VERTEX_STREAMS, vector_size);
-      gs->llvm_prim_ids = align_malloc(vector_size, vector_size);
+      gs->llvm_prim_ids = align_calloc(vector_size, vector_size);
 
       gs->fetch_outputs = llvm_fetch_gs_outputs;
       gs->fetch_inputs = llvm_fetch_gs_input;