[Bug tree-optimization/51737] [4.6 Regression] g++ crashes (internal compiler error: Segmentation fault) when compiling quickbook

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51737

--- Comment #15 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-29 
15:17:33 UTC ---
(In reply to comment #13)
> > The question is why we call delete_unreachable_blocks from
> > tree_function_versioning at all.  We do not bother updating the
> > callgraph anywhere else.
> > 
> > Honza, you added that beast?
> 
> Well, after clonning we alter CFG and we need to update SSA for which we need
> to update dominators and those needs unreachable blocks gone.  I will look 
> into
> this.

Ok - but why bother updating the callgraph?