[OpenMP] Parsing and sema support for target update directive

Summary:
This patch is to add parsing and sema support for `target update` directive. Support for the `to` and `from` clauses will be added by a different patch.  This patch also adds support for other clauses that are already implemented upstream and apply to `target update`, e.g. `device` and `if`.

This patch is based on the original post by Kelvin Li.

Reviewers: hfinkel, carlo.bertolli, kkwli0, arpith-jacob, ABataev

Subscribers: caomhin, cfe-commits

Differential Revision: http://reviews.llvm.org/D15944

llvm-svn: 270878

1 files changed, 6 insertions, 2 deletions

diff --git a/clang/include/clang-c/Index.h b/clang/include/clang-c/Index.h
index 794c49047fe..dbcd0c8840f 100644
--- a/clang/include/clang-c/Index.h
+++ b/clang/include/clang-c/Index.h
@@ -2281,7 +2281,7 @@ enum CXCursorKind {
    */
   CXCursor_OMPTaskLoopSimdDirective      = 259,
 
-   /** \brief OpenMP distribute directive.
+  /** \brief OpenMP distribute directive.
    */
   CXCursor_OMPDistributeDirective        = 260,
 
@@ -2301,7 +2301,11 @@ enum CXCursorKind {
    */
   CXCursor_OMPTargetParallelForDirective = 264,
 
-  CXCursor_LastStmt                   = CXCursor_OMPTargetParallelForDirective,
+  /** \brief OpenMP target update directive.
+   */
+  CXCursor_OMPTargetUpdateDirective      = 265,
+
+  CXCursor_LastStmt                      = CXCursor_OMPTargetUpdateDirective,
 
   /**
    * \brief Cursor that represents the translation unit itself.