Refine placement of LangOptions object in CompilerInvocation by adding a new baseclass CompilerInvocationBase with a custom copy constructor.  This ensures that whenever the CompilerInvocation object's copy constructor is used we always clone the LangOptions object.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@144973 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed