[hellogcc] ??????[hellogcc] Re: [hellogcc] gccint??GTY????????,????????????
- From: "perr" <2029352818@xxxxxx>
- To: "hellogcc" <hellogcc@xxxxxxxxxxxxx>, "hellogcc" <hellogcc@xxxxxxxxxxxxx>
- Date: Fri, 29 Aug 2014 09:57:35 +0800
flexible array members
????????????????,????????????1,??????gnu??????????????,????????????0,????????????
------------------ ???????? ------------------
??????: "Kito Cheng"<kito.cheng@xxxxxxxxx>;
????????: 2014??8??29??(??????) ????0:28
??????: "hellogcc"<hellogcc@xxxxxxxxxxxxx>;
????: [hellogcc] Re: [hellogcc] gccint??GTY????????,????????????
keyword: flexible array members
2014-08-28 20:27 GMT+08:00 perr <2029352818@xxxxxx>:
> ????: https://gcc.gnu.org/onlinedocs/gccint/GTY-Options.html#GTY-Options
>
> length ("expression")??????????????????:(????????????)
>
> struct GTY(()) rtvec_def {
> int num_elem; /* number of elements */
> rtx GTY ((length ("%h.num_elem"))) elem[1];
> };
>
> ??????????????????????:
>
> struct rtvec_def t;
>
> ??????????,????????t.num_elem??????t.elem, ????????????????t,
> t.num_elem??????????????,??????????????0????,????????????,??????????0??t.elem[]????????????,??????????????1??.
> ????????gcc????,??????????????????,??????
>
> ?6?9
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