glsl: Statically cast parameter exec_node to ir_variable.

Formal function parameters are always ir_variable objects, not an
arbitrary ir_instruction.  So there's no need to dynamically cast here.

Signed-off-by: Kenneth Graunke <[email protected]>
Reviewed-by: Matt Turner <[email protected]>
Reviewed-by: Ian Romanick <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/glsl/builtin_functions.cpp b/src/glsl/builtin_functions.cpp
index 5b8463a8942..662ff4cea3f 100644
--- a/src/glsl/builtin_functions.cpp
+++ b/src/glsl/builtin_functions.cpp
@@ -2399,7 +2399,7 @@ builtin_builder::call(ir_function *f, ir_variable *ret, exec_list params)
    exec_list actual_params;
 
    foreach_list(node, &params) {
-      ir_variable *var = ((ir_instruction *) node)->as_variable();
+      ir_variable *var = (ir_variable *) node;
       actual_params.push_tail(var_ref(var));
    }