glsl: Cast ir_call parameters to ir_rvalue, not ir_instruction.

A function call's parameters are always rvalues.  ir_rvalue may not
always be a subclass of ir_instruction in the future, so we should use
the right one.

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/opt_copy_propagation.cpp b/src/glsl/opt_copy_propagation.cpp
index 3a73342683b..44c6f2fd3e9 100644
--- a/src/glsl/opt_copy_propagation.cpp
+++ b/src/glsl/opt_copy_propagation.cpp
@@ -188,7 +188,7 @@ ir_copy_propagation_visitor::visit_enter(ir_call *ir)
    exec_list_iterator sig_param_iter = ir->callee->parameters.iterator();
    foreach_iter(exec_list_iterator, iter, ir->actual_parameters) {
       ir_variable *sig_param = (ir_variable *)sig_param_iter.get();
-      ir_instruction *ir = (ir_instruction *)iter.get();
+      ir_rvalue *ir = (ir_rvalue *) iter.get();
       if (sig_param->data.mode != ir_var_function_out
           && sig_param->data.mode != ir_var_function_inout) {
          ir->accept(this);