Check in the beginnings of my new vtable layout builder idea.

Right now, it's off by default but can be tested by passing -fdump-vtable-layouts to clang -cc1. This option will cause all vtables that will normally be emitted as part of codegen to also be dumped using the new layout code.

I've also added a very simple new vtable layout test case.




git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95865 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed