[OPENMP] Add reverse_offload clause to requires directive

llvm-svn: 343711
diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index cb4f491..7cf7817 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -11726,6 +11726,9 @@
   case OMPC_unified_shared_memory:
     C = new (Context) OMPUnifiedSharedMemoryClause();
     break;
+  case OMPC_reverse_offload:
+    C = new (Context) OMPReverseOffloadClause();
+    break;
   case OMPC_private:
     C = OMPPrivateClause::CreateEmpty(Context, Record.readInt());
     break;
@@ -11959,6 +11962,8 @@
 void OMPClauseReader::VisitOMPUnifiedSharedMemoryClause(
     OMPUnifiedSharedMemoryClause *) {}
 
+void OMPClauseReader::VisitOMPReverseOffloadClause(OMPReverseOffloadClause *) {}
+
 void OMPClauseReader::VisitOMPPrivateClause(OMPPrivateClause *C) {
   C->setLParenLoc(Record.readSourceLocation());
   unsigned NumVars = C->varlist_size();