2011/2/25 Mingjie Xing <mingjie.x...@gmail.com>:
> Hi,
>
> This patch updates the description about ENTRY_BLOCK_PTR and
> EXIT_BLOCK_PTR, since their index numbers are no longer negative now.
>
> Is it OK?
>
> Thanks,
> Mingjie
>
> ChangeLog,
> 2011-02-25 Mingjie Xing <mingjie.x...@gmail.com>
>
> * doc/cfg.texi (ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR): Update the
> description about their index numbers.
>
>
> Index: doc/cfg.texi
> ===================================================================
> --- doc/cfg.texi (revision 170165)
> +++ doc/cfg.texi (working copy)
> @@ -67,8 +67,8 @@ blocks. The index for any block should
> Special basic blocks represent possible entry and exit points of a
> function. These blocks are called @code{ENTRY_BLOCK_PTR} and
> @code{EXIT_BLOCK_PTR}. These blocks do not contain any code, and are
> -not elements of the @code{BASIC_BLOCK} array. Therefore they have
> -been assigned unique, negative index numbers.
> +always in the CFG. They are assigned unique index numbers 0 and 1
> +respectively. Therefore @code{NUM_FIXED_BLOCKS} are 2.
>
> Each @code{basic_block} also contains pointers to the first
> instruction (the @dfn{head}) and the last instruction (the @dfn{tail})
>
Ping.
