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Re: cfg merge part 17 - loop datastructure updates


Hello.

> > Here is the patch (also updated after bb renumbering removal).
> 
> Thanks.  Nearly ok.
> 
> > +       /* We could not redirect edges freely here. On the other hand,
> > + 	 we know that no abnormal edge enters this block, so we can simply
> > + 	 split the edge from entry block.  */
> 
> Actually, it is possible for the first block to be the target
> of an abnormal edge.  There could be a computed jump to a label
> at the beginning of the function.  But certainly that's not
> worth handling beyond not setting the header bit if we find one.
> 
> Ok with that change.

Actually it is not possible -- as otherwise this block would not be
taken as loop header.

Zdenek


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