{"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":".unwrap_or_else(||"}]}
            .unwrap_or_else(|| bug!("Unknown intrinsic: `{base_name}`"));
        let intrinsic = llvm::Intrinsic::lookup(base_name.as_bytes())
        let f = intrinsic.get_declaration(self.llmod, &type_params);