glsl: don't change the varying type in validation code

There is a function dedicated to demoting unused varyings lets
trust it to do its job.

Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>

diff --git a/src/glsl/link_varyings.cpp b/src/glsl/link_varyings.cpp
index 6119eff..c43abbc 100644 (file)
--- a/src/glsl/link_varyings.cpp
+++ b/src/glsl/link_varyings.cpp
@@ -1669,11 +1669,6 @@ assign_varying_locations(struct gl_context *ctx,
                            var->name,
                             _mesa_shader_stage_to_string(producer->Stage));
             }
-
-            /* An 'in' variable is only really a shader input if its
-             * value is written by the previous stage.
-             */
-            var->data.mode = ir_var_auto;
          }
       }
    }