Changes made per Doug's comments.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@73897 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index e989b1f..d0cd23e 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -5462,9 +5462,13 @@
   
   // Note that this declaration has been used.
   if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
-    DefineImplicitDefaultConstructor(Loc, Constructor);
-    // FIXME: set the Used flag if it is determined that ctor is valid.
-    Constructor->setUsed(true);
+    if (Constructor->isImplicit() && Constructor->isDefaultConstructor()) {
+        if (!Constructor->isUsed())
+          DefineImplicitDefaultConstructor(Loc, Constructor);
+    }
+    // FIXME: more checking for other implicits go here.
+    else
+      Constructor->setUsed(true);
     return;
   }