Patch for PR tree-optimization/32941, bootstrap comparision failure

[Steve Ellcey]

> > But the stmt field in the goto_queue_node is a tree, adding an id would
> > mean adding an id to the general tree structure (I think).  Are we willing
> > to add that kind of space?
> 
> see stmt_ann->uid :)
> 
> It's for your user for these sorts of things.

I see.  After looking at pointer-set.c I think I will try Ian's idea of
using a pointer map and see if I can make things work that way.  Then we
can skip the sorting and use a hash for the lookup.

Steve Ellcey
sje@cup.hp.com