syntax_data: {"ast_node_type":"variable","tokens":[{"end":115,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // Ret args cannot be passed via stack, we lower to indirect and let the backend handle the invisible reference
context_before:     classify_arg_ty(arg, &mut arg_gprs_left, MAX_RET_IN_REGS_SIZE);
context_after:     match arg.mode {