Add support for member references (E1.E2, E1->E2) with C++ semantics,
which can refer to static data members, enumerators, and member
functions as well as to non-static data members.

Implement correct lvalue computation for member references in C++. 
Compute the result type of non-static data members of reference type properly.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@61294 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprConstant.cpp b/lib/CodeGen/CGExprConstant.cpp
index 2166a5c..a82efca 100644
--- a/lib/CodeGen/CGExprConstant.cpp
+++ b/lib/CodeGen/CGExprConstant.cpp
@@ -564,7 +564,10 @@
       else
         Base = EmitLValue(ME->getBase());
 
-      unsigned FieldNumber = CGM.getTypes().getLLVMFieldNo(ME->getMemberDecl());
+      FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl());
+      // FIXME: Handle other kinds of member expressions.
+      assert(Field && "No code generation for non-field member expressions");
+      unsigned FieldNumber = CGM.getTypes().getLLVMFieldNo(Field);
       llvm::Constant *Zero = llvm::ConstantInt::get(llvm::Type::Int32Ty, 0);
       llvm::Constant *Idx = llvm::ConstantInt::get(llvm::Type::Int32Ty,
                                                    FieldNumber);