[OpenMP] Parsing + sema for target parallel directive.

Summary:
This patch adds parsing + sema for the target parallel directive and its clauses along with testcases.

Reviewers: ABataev

Differential Revision: http://reviews.llvm.org/D16553

Rebased to current trunk and updated test cases.

llvm-svn: 258832
diff --git a/clang/lib/Basic/OpenMPKinds.cpp b/clang/lib/Basic/OpenMPKinds.cpp
index dec6524..e66a3e3 100644
--- a/clang/lib/Basic/OpenMPKinds.cpp
+++ b/clang/lib/Basic/OpenMPKinds.cpp
@@ -455,6 +455,16 @@
       break;
     }
     break;
+  case OMPD_target_parallel:
+    switch (CKind) {
+#define OPENMP_TARGET_PARALLEL_CLAUSE(Name)                                    \
+  case OMPC_##Name:                                                            \
+    return true;
+#include "clang/Basic/OpenMPKinds.def"
+    default:
+      break;
+    }
+    break;
   case OMPD_teams:
     switch (CKind) {
 #define OPENMP_TEAMS_CLAUSE(Name)                                              \
@@ -562,7 +572,8 @@
 bool clang::isOpenMPParallelDirective(OpenMPDirectiveKind DKind) {
   return DKind == OMPD_parallel || DKind == OMPD_parallel_for ||
          DKind == OMPD_parallel_for_simd ||
-         DKind == OMPD_parallel_sections; // TODO add next directives.
+         DKind == OMPD_parallel_sections || DKind == OMPD_target_parallel;
+         // TODO add next directives.
 }
 
 bool clang::isOpenMPTargetDirective(OpenMPDirectiveKind DKind) {