{"ast_node_type":"variable","tokens":[{"end":40,"kind":"keyword","start":0,"text":"let"}]}
    let arg_off = bx.const_u64(padding);
    let arg_ptr_v = bx.load(bx.type_ptr(), overflow_arg_area, ptr_align_abi);
    let mem_addr = bx.ptradd(arg_ptr_v, arg_off);