[OPENMP] Sema analysis for 'atomic capture' construct.

Added sema checks for forms of expressions/statements allowed under control of 'atomic capture' directive + generation of helper objects for future codegen.

llvm-svn: 233785
diff --git a/clang/lib/Serialization/ASTReaderStmt.cpp b/clang/lib/Serialization/ASTReaderStmt.cpp
index b31d9e7..e40b1d9 100644
--- a/clang/lib/Serialization/ASTReaderStmt.cpp
+++ b/clang/lib/Serialization/ASTReaderStmt.cpp
@@ -2162,6 +2162,7 @@
   D->setExpr(Reader.ReadSubExpr());
   D->setUpdateExpr(Reader.ReadSubExpr());
   D->IsXLHSInRHSPart = Record[Idx++] != 0;
+  D->IsPostfixUpdate = Record[Idx++] != 0;
 }
 
 void ASTStmtReader::VisitOMPTargetDirective(OMPTargetDirective *D) {