Straw man for instantiation of expressions. Use it to instantiate the
width of bitfields. 

I'll be burning this down and replacing it with a properly-dispatched
implementation like the one used for types.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66796 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed