2011/6/14 ���f任 <che...@iis.sinica.edu.tw>:
> The patch correct statement about CFG. According to the comment on
> the function gimple_expand_cfg in gcc/cfgexpand.c, the tree CFG now
> is preserved and expanded to RTL representation.
>
> 2011-06-14 Wei-Ren Chen <che...@iis.sinica.edu.tw>
>
> * gcc/doc/cfg.texi: Correct statement about CFG.
>
> Index: cfg.texi
> ===================================================================
> --- cfg.texi (revision 175007)
> +++ cfg.texi (working copy)
> @@ -612,11 +612,10 @@
> code.
>
> Note that at present, the representation of control flow in the
> -@code{tree} representation is discarded before expanding to RTL@.
> -Long term the CFG should be maintained and ``expanded'' to the
> -RTL representation along with the function @code{tree} itself.
> +@code{tree} representation is maintained and ``expanded'' to the RTL
> +representation. So the CFG simultaneously consist of basic blocks
> +containing RTL and GIMPLE trees.
>
> -
> @node Liveness information
> @section Liveness information
> @cindex Liveness representation
>
> --
> Wei-Ren Chen (���f任)
> Computer Systems Lab, Institute of Information Science,
> Academia Sinica, Taiwan (R.O.C.)
> Tel:886-2-2788-3799 #1667
>
The document cfg.texi is out of date. This reminds me another sinking
patch (http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01624.html).
Thanks,
Mingjie
