llvmpipe: don't allow branch to end for early Z with multisample

Don't allow the branching optimisation with multisample enabled
as we have to check all samples.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4122>

diff --git a/src/gallium/drivers/llvmpipe/lp_state_fs.c b/src/gallium/drivers/llvmpipe/lp_state_fs.c
index 79a8cc1fe1a53bbb1e53795b742e7aea6ed38a34..8c3fc05fa0449b126240d0e124abf29d1ea30182 100644 (file)
--- a/src/gallium/drivers/llvmpipe/lp_state_fs.c
+++ b/src/gallium/drivers/llvmpipe/lp_state_fs.c
@@ -570,7 +570,7 @@ generate_fs_loop(struct gallivm_state *gallivm,
                                   z, z_fb, s_fb,
                                   facing,
                                   &z_value, &s_value,
-                                  !simple_shader);
+                                  !simple_shader && !key->multisample);
 
       if (depth_mode & EARLY_DEPTH_WRITE) {
          lp_build_depth_stencil_write_swizzled(gallivm, type,