MS ABI: Insert copy-constructors into the CatchableType

Find all unambiguous public classes of the exception object's class type
and reference all of their copy constructors.  Yes, this is not
conforming but it is necessary in order to implement their ABI.  This is
because the copy constructor is actually referenced by the metadata
describing which catch handlers are eligible to handle the exception
object.

N.B.  This doesn't yet handle the copy constructor closure case yet,
that work is ongoing.

Differential Revision: http://reviews.llvm.org/D8101

llvm-svn: 231499

1 files changed, 9 insertions, 0 deletions

diff --git a/clang/lib/AST/CXXABI.h b/clang/lib/AST/CXXABI.h
index 8e9e358525e..62c96f901e6 100644
--- a/clang/lib/AST/CXXABI.h
+++ b/clang/lib/AST/CXXABI.h
@@ -20,6 +20,7 @@
 namespace clang {
 
 class ASTContext;
+class CXXConstructorDecl;
 class MemberPointerType;
 class MangleNumberingContext;
 
@@ -41,6 +42,14 @@ public:
 
   /// Returns a new mangling number context for this C++ ABI.
   virtual MangleNumberingContext *createMangleNumberingContext() const = 0;
+
+  /// Adds a mapping from class to copy constructor for this C++ ABI.
+  virtual void addCopyConstructorForExceptionObject(CXXRecordDecl *,
+                                                    CXXConstructorDecl *) = 0;
+
+  /// Retrieves the mapping from class to copy constructor for this C++ ABI.
+  virtual const CXXConstructorDecl *
+  getCopyConstructorForExceptionObject(CXXRecordDecl *) = 0;
 };
 
 /// Creates an instance of a C++ ABI class.