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

[hubicka at ucw dot cz]

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

--- Comment #13 from Jan Hubicka <hubicka at ucw dot cz> 2012-02-29 15:01:31 
UTC ---
> 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.

Honza