Refine construction vtables; they don't include bits that don't have
virtual bases unless they are morally virtual.

llvm-svn: 87071
diff --git a/clang/lib/CodeGen/CGVtable.cpp b/clang/lib/CodeGen/CGVtable.cpp
index 9f45343..b12a48a 100644
--- a/clang/lib/CodeGen/CGVtable.cpp
+++ b/clang/lib/CodeGen/CGVtable.cpp
@@ -585,6 +585,11 @@
     if (!RD->isDynamicClass())
       return 0;
 
+    // Construction vtable don't need parts that have no virtual bases and
+    // aren't morally virtual.
+    if ((LayoutClass != Class) && RD->getNumVBases() == 0 && !MorallyVirtual)
+      return 0;
+
     const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD);
     const CXXRecordDecl *PrimaryBase = Layout.getPrimaryBase();
     const bool PrimaryBaseWasVirtual = Layout.getPrimaryBaseWasVirtual();