[PATCH] Remove struct tree_base

[Tom Tromey]

>>>>> "Jakub" == Jakub Jelinek <jakub@redhat.com> writes:

Jakub> After the removal of GIMPLE_MODIFY_STMT, there is IMNSHO no reason to
Jakub> keep struct tree_base separate from struct tree_common, as all trees
Jakub> now are derived from tree_common.  Ok for trunk?

The existence of tree_base would make it a bit simpler to remove the
'chain' field from selected trees.  I am not sure this is sufficient
justification, given that AFAIK nobody is working on doing that, but I
thought it was worth mentioning.

Tom