Mark some variables as having usage beyond the shader's scope.

This will be important to optimization passes.  We don't want to
dead-code eliminate writes to out varyings, or propagate uninitialized
values of uniforms.

1 files changed, 9 insertions, 0 deletions

diff --git a/ast_to_hir.cpp b/ast_to_hir.cpp
index 83dac584b2b..316bcf7d71c 100644
--- a/ast_to_hir.cpp
+++ b/ast_to_hir.cpp
@@ -1446,6 +1446,15 @@ apply_type_qualifier_to_variable(const struct ast_type_qualifier *qual,
    else
       var->mode = ir_var_auto;
 
+   if (qual->uniform)
+      var->shader_in = true;
+   if (qual->varying) {
+      if (qual->in)
+	 var->shader_in = true;
+      if (qual->out)
+	 var->shader_out = true;
+   }
+
    if (qual->flat)
       var->interpolation = ir_var_flat;
    else if (qual->noperspective)