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.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@119289 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/ASTReaderStmt.cpp b/lib/Serialization/ASTReaderStmt.cpp
index 41386dc..26077c5 100644
--- a/lib/Serialization/ASTReaderStmt.cpp
+++ b/lib/Serialization/ASTReaderStmt.cpp
@@ -178,6 +178,8 @@
 
     void VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E);
     void VisitCXXNoexceptExpr(CXXNoexceptExpr *E);
+
+    void VisitOpaqueValueExpr(OpaqueValueExpr *E);
   };
 }
 
@@ -1280,6 +1282,11 @@
   E->Operand = Reader.ReadSubExpr();
 }
 
+void ASTStmtReader::VisitOpaqueValueExpr(OpaqueValueExpr *E) {
+  VisitExpr(E);
+  E->setValueKind(static_cast<ExprValueKind>(Record[Idx++]));
+}
+
 Stmt *ASTReader::ReadStmt(PerFileData &F) {
   switch (ReadingKind) {
   case Read_Decl:
@@ -1795,6 +1802,10 @@
     case EXPR_CXX_NOEXCEPT:
       S = new (Context) CXXNoexceptExpr(Empty);
       break;
+
+    case EXPR_OPAQUE_VALUE:
+      S = new (Context) OpaqueValueExpr(Empty);
+      break;
     }
     
     // We hit a STMT_STOP, so we're done with this expression.