[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/CGStmtOpenMP.cpp b/clang/lib/CodeGen/CGStmtOpenMP.cpp
index 2a4e89b..1ca04a6a5 100644
--- a/clang/lib/CodeGen/CGStmtOpenMP.cpp
+++ b/clang/lib/CodeGen/CGStmtOpenMP.cpp
@@ -3124,7 +3124,8 @@
   llvm::Function *OutlinedFn = CGM.getOpenMPRuntime().emitTaskOutlinedFunction(
       S, *I, *PartId, *TaskT, S.getDirectiveKind(), CodeGen, Data.Tied,
       Data.NumberOfParts);
-  OMPLexicalScope Scope(*this, S);
+  OMPLexicalScope Scope(*this, S, llvm::None,
+                        !isOpenMPParallelDirective(S.getDirectiveKind()));
   TaskGen(*this, OutlinedFn, Data);
 }
 
@@ -5120,6 +5121,22 @@
   CGM.getOpenMPRuntime().emitMasterRegion(*this, CodeGen, S.getBeginLoc());
 }
 
+void CodeGenFunction::EmitOMPParallelMasterTaskLoopDirective(
+    const OMPParallelMasterTaskLoopDirective &S) {
+  auto &&CodeGen = [this, &S](CodeGenFunction &CGF, PrePostActionTy &Action) {
+    auto &&TaskLoopCodeGen = [&S](CodeGenFunction &CGF,
+                                  PrePostActionTy &Action) {
+      Action.Enter(CGF);
+      CGF.EmitOMPTaskLoopBasedDirective(S);
+    };
+    OMPLexicalScope Scope(CGF, S, llvm::None, /*EmitPreInitStmt=*/false);
+    CGM.getOpenMPRuntime().emitMasterRegion(CGF, TaskLoopCodeGen,
+                                            S.getBeginLoc());
+  };
+  emitCommonOMPParallelDirective(*this, S, OMPD_master_taskloop, CodeGen,
+                                 emitEmptyBoundParameters);
+}
+
 // Generate the instructions for '#pragma omp target update' directive.
 void CodeGenFunction::EmitOMPTargetUpdateDirective(
     const OMPTargetUpdateDirective &S) {