[OPENMP50]Add support for 'parallel master taskloop' construct.

Added parsing/sema/codegen support for 'parallel master taskloop'
constructs. Some of the clauses, like 'grainsize', 'num_tasks', 'final'
and 'priority' are not supported in full, only constant expressions can
be used currently in these clauses.

llvm-svn: 374791
diff --git a/clang/lib/CodeGen/CGStmt.cpp b/clang/lib/CodeGen/CGStmt.cpp
index b493050..c5f6e55 100644
--- a/clang/lib/CodeGen/CGStmt.cpp
+++ b/clang/lib/CodeGen/CGStmt.cpp
@@ -284,6 +284,10 @@
   case Stmt::OMPMasterTaskLoopDirectiveClass:
     EmitOMPMasterTaskLoopDirective(cast<OMPMasterTaskLoopDirective>(*S));
     break;
+  case Stmt::OMPParallelMasterTaskLoopDirectiveClass:
+    EmitOMPParallelMasterTaskLoopDirective(
+        cast<OMPParallelMasterTaskLoopDirective>(*S));
+    break;
   case Stmt::OMPDistributeDirectiveClass:
     EmitOMPDistributeDirective(cast<OMPDistributeDirective>(*S));
     break;