{"ast_node_type":"variable","tokens":[{"end":77,"kind":"keyword","start":0,"text":"let"}]}
        let ir_name = CStr::from_ptr(ir_name).to_str().expect("valid UTF-8");
        let pass_name = CStr::from_ptr(pass_name).to_str().expect("valid UTF-8");
        llvm_self_profiler.before_pass_callback(pass_name, ir_name);