[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, 22 insertions, 0 deletions

diff --git a/clang/lib/AST/StmtOpenMP.cpp b/clang/lib/AST/StmtOpenMP.cpp
index b89e01c1cde..c850c099d64 100644
--- a/clang/lib/AST/StmtOpenMP.cpp
+++ b/clang/lib/AST/StmtOpenMP.cpp
@@ -1012,3 +1012,25 @@ OMPDistributeDirective::CreateEmpty(const ASTContext &C, unsigned NumClauses,
                              numLoopChildren(CollapsedNum, OMPD_distribute));
   return new (Mem) OMPDistributeDirective(CollapsedNum, NumClauses);
 }
+
+OMPTargetUpdateDirective *
+OMPTargetUpdateDirective::Create(const ASTContext &C, SourceLocation StartLoc,
+                                 SourceLocation EndLoc,
+                                 ArrayRef<OMPClause *> Clauses) {
+  unsigned Size = llvm::alignTo(sizeof(OMPTargetUpdateDirective),
+                                llvm::alignOf<OMPClause *>());
+  void *Mem = C.Allocate(Size + sizeof(OMPClause *) * Clauses.size());
+  OMPTargetUpdateDirective *Dir =
+      new (Mem) OMPTargetUpdateDirective(StartLoc, EndLoc, Clauses.size());
+  Dir->setClauses(Clauses);
+  return Dir;
+}
+
+OMPTargetUpdateDirective *
+OMPTargetUpdateDirective::CreateEmpty(const ASTContext &C, unsigned NumClauses,
+                                      EmptyShell) {
+  unsigned Size = llvm::alignTo(sizeof(OMPTargetUpdateDirective),
+                                llvm::alignOf<OMPClause *>());
+  void *Mem = C.Allocate(Size + sizeof(OMPClause *) * NumClauses);
+  return new (Mem) OMPTargetUpdateDirective(NumClauses);
+}