nir/lower_io: Identify Mesh output as arrayed

Mesh shader outputs are either:

- non-array builtins
- array builtins that are either per-primitive or per-vertex
- user-defined outputs that must be either per-primitive or per-vertex

So we can identify any array output as "arrayed" for the purposes of
I/O lowering.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10600>

diff --git a/src/compiler/nir/nir_lower_io.c b/src/compiler/nir/nir_lower_io.c
index c9aa0b2..899f0e0 100644 (file)
--- a/src/compiler/nir/nir_lower_io.c
+++ b/src/compiler/nir/nir_lower_io.c
@@ -158,7 +158,8 @@ nir_is_arrayed_io(const nir_variable *var, gl_shader_stage stage)
              stage == MESA_SHADER_TESS_EVAL;
 
    if (var->data.mode == nir_var_shader_out)
-      return stage == MESA_SHADER_TESS_CTRL;
+      return stage == MESA_SHADER_TESS_CTRL ||
+             stage == MESA_SHADER_MESH;
 
    return false;
 }