[C++ PATCH] Stage 2: Implement access check for template instantiation (2/n)

[Kriang Lerdsuwanakij]

Paolo Bonzini wrote:

>
> The idea is to make TREE_CHAIN disappear sooner or later.  Not all 
> nodes need it.  See for example the way PHI_CHAIN is defined and used.

Then that makes sense.  I'll revise my patch.

--Kriang