In microsoft mode, downgrade pseudo-destructors on void from error to warning.

This matches cl.exe's behavior and fixes PR11791.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148682 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaExprCXX.cpp b/lib/Sema/SemaExprCXX.cpp
index edc5b08..d3bbc14 100644
--- a/lib/Sema/SemaExprCXX.cpp
+++ b/lib/Sema/SemaExprCXX.cpp
@@ -4380,8 +4380,11 @@
     return ExprError();
 
   if (!ObjectType->isDependentType() && !ObjectType->isScalarType()) {
-    Diag(OpLoc, diag::err_pseudo_dtor_base_not_scalar)
-      << ObjectType << Base->getSourceRange();
+    if (getLangOptions().MicrosoftMode && ObjectType->isVoidType())
+      Diag(OpLoc, diag::ext_pseudo_dtor_on_void);
+    else
+      Diag(OpLoc, diag::err_pseudo_dtor_base_not_scalar)
+        << ObjectType << Base->getSourceRange();
     return ExprError();
   }