Add a new expression kind, OpaqueValueExpr, which is useful for
certain internal type-checking procedures as well as for representing
certain implicitly-generated operations.  Uses to follow.

llvm-svn: 119289
diff --git a/clang/lib/Checker/GRExprEngine.cpp b/clang/lib/Checker/GRExprEngine.cpp
index ecf2103..d5c9ffa 100644
--- a/clang/lib/Checker/GRExprEngine.cpp
+++ b/clang/lib/Checker/GRExprEngine.cpp
@@ -744,6 +744,7 @@
     case Stmt::NoStmtClass:
     case Stmt::NullStmtClass:
     case Stmt::SwitchCaseClass:
+    case Stmt::OpaqueValueExprClass:
       llvm_unreachable("Stmt should not be in analyzer evaluation loop");
       break;