Add a new expression classification, CL_AddressableVoid

CL_AddressableVoid is the expression classification used for void
expressions whose address can be taken, i.e. the result of [], *
or void variable references in C, as opposed to things like the
result of a void function call.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129783 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed