MS ABI: Don't ICE for pointers to pointers to members of incomplete classes

CodeGen would try to come up with an LLVM IR type for a pointer to
member type on the way to forming an LLVM IR type for a pointer to
pointer to member type.

However, if the pointer to member representation has not been locked in yet,
we would not be able to come up with a pointer to member IR type.

In these cases, make the pointer to member type an incomplete type.
This will make the pointer to pointer to member type a pointer to an
incomplete type.  If the class eventually obtains an inheritance model,
we will make the pointer to member type represent the actual inheritance
model.

Differential Revision: http://reviews.llvm.org/D5373

llvm-svn: 218084

1 files changed, 4 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGCXXABI.h b/clang/lib/CodeGen/CGCXXABI.h
index b7ce0b07e57..f021e886c02 100644
--- a/clang/lib/CodeGen/CGCXXABI.h
+++ b/clang/lib/CodeGen/CGCXXABI.h
@@ -161,6 +161,10 @@ public:
     return true;
   }
 
+  virtual bool isTypeInfoCalculable(QualType Ty) const {
+    return !Ty->isIncompleteType();
+  }
+
   /// Create a null member pointer of the given type.
   virtual llvm::Constant *EmitNullMemberPointer(const MemberPointerType *MPT);