ast_function: Set constant_value on return value temporaries in 1.20+.

diff --git a/src/glsl/ast_function.cpp b/src/glsl/ast_function.cpp
index 855f27f..bb45e25 100644 (file)
--- a/src/glsl/ast_function.cpp
+++ b/src/glsl/ast_function.cpp
@@ -122,6 +122,8 @@ process_call(exec_list *instructions, ir_function *f,
         deref = new(ctx) ir_dereference_variable(var);
         ir_assignment *assign = new(ctx) ir_assignment(deref, call, NULL);
         instructions->push_tail(assign);
+        if (state->language_version >= 120)
+           var->constant_value = call->constant_expression_value();
 
         deref = new(ctx) ir_dereference_variable(var);
         return deref;