47    virtual void visit(class ir_rvalue *) { assert(!"unhandled error_type"); }  in visit()  function
77    virtual void visit(class ir_variable *) {}  in visit()  function
78    virtual void visit(class ir_expression *) {}  in visit()  function
79    virtual void visit(class ir_texture *) {}  in visit()  function
80    virtual void visit(class ir_swizzle *) {}  in visit()  function
81    virtual void visit(class ir_dereference_variable *) {}  in visit()  function
82    virtual void visit(class ir_dereference_array *) {}  in visit()  function
83    virtual void visit(class ir_dereference_record *) {}  in visit()  function
84    virtual void visit(class ir_assignment *) {}  in visit()  function
85    virtual void visit(class ir_constant *) {}  in visit()  function
86    virtual void visit(class ir_call *) {}  in visit()  function
87    virtual void visit(class ir_demote *) {}  in visit()  function
88    virtual void visit(class ir_emit_vertex *) {}  in visit()  function
89    virtual void visit(class ir_end_primitive *) {}  in visit()  function
90    virtual void visit(class ir_barrier *) {}  in visit()  function