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Re: [tree-ssa] Block merging (updated)

Hello,

> On Tue, Jan 13, 2004 at 12:30:27PM +0100, Zdenek Dvorak wrote:
> > +   /* Merge the chains.  */
> > +   last = tsi_last (a->stmt_list);
> > +   tsi_link_after (&last, b->stmt_list, TSI_NEW_STMT);
> > +   b->stmt_list = alloc_stmt_list ();
> 
> Why not "b->stmt_list = NULL"?  We're about to remove the thing...

because we are going to call remove_bb to do it, which will try
to remove the statements, which would crash if it was NULL.

Zdenek
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