Lift out ABIInfo abstract base class.
 - Currently still lives in CGCall.cpp but is intended to be the
   target specific place for hooking ABI information.
 - Select ABIInfo to use based on Target's prefix and pointer width.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57445 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed