Simplified and generalized transfer function logic for casts, allowing
the transfer function to be invoked without an Expr* for the Cast operation.

Added implicit promotions to the transfer function logic for compound
assignments.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@47444 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed