[c++2a] P0515R3: Support for overloaded operator<=>.

No CodeGen support for MSABI yet, we don't know how to mangle this there.

llvm-svn: 319513
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index fb60ebf..f0b43f0 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -9902,6 +9902,7 @@
   case OO_GreaterGreaterEqual:
   case OO_EqualEqual:
   case OO_ExclaimEqual:
+  case OO_Spaceship:
   case OO_PlusPlus:
   case OO_MinusMinus:
   case OO_Comma: