{"ast_node_type":"variable","tokens":[{"end":91,"kind":"keyword","start":0,"text":"let"}]}
                        let llvm_name = if name == sym::ctlz || name == sym::ctlz_nonzero {
                            self.const_bool(name == sym::ctlz_nonzero || name == sym::cttz_nonzero);
                            "llvm.ctlz"