[Mesa-dev] [PATCH 43/46] glsl: don't demote tess control shader outputs

[Marek Olšák]

From: Marek Olšák <marek.olsak at amd.com>

---
 src/glsl/link_varyings.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/glsl/link_varyings.cpp b/src/glsl/link_varyings.cpp
index a4d0f1c..5fa9ddf 100644
--- a/src/glsl/link_varyings.cpp
+++ b/src/glsl/link_varyings.cpp
@@ -1451,8 +1451,12 @@ assign_varying_locations(struct gl_context *ctx,
          /* If a matching input variable was found, add this ouptut (and the
           * input) to the set.  If this is a separable program and there is no
           * consumer stage, add the output.
+          *
+          * Always add TCS outputs. They are shared by all invocations
+          * within a patch and can be used as shared memory.
           */
-         if (input_var || (prog->SeparateShader && consumer == NULL)) {
+         if (input_var || (prog->SeparateShader && consumer == NULL) ||
+             producer->Type == GL_TESS_CONTROL_SHADER) {
             matches.record(output_var, input_var);
          }
 
-- 
2.1.0