[OPENMP] Initial codegen for 'parallel sections' directive.

Emits code for outlined 'parallel' directive with the implicitly inlined 'sections' directive:

...
call __kmpc_fork_call(..., outlined_function, ...);
...

define internal void outlined_function(...) {
    <code for implicit sections directive>;
}
Differential Revision: http://reviews.llvm.org/D8997

llvm-svn: 234849
diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index 087acc7..6ba3db0 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -2085,15 +2085,16 @@
   void EmitOMPTargetDirective(const OMPTargetDirective &S);
   void EmitOMPTeamsDirective(const OMPTeamsDirective &S);
 
+  void
+  EmitOMPInnerLoop(const Stmt &S, bool RequiresCleanup, const Expr *LoopCond,
+                   const Expr *IncExpr,
+                   const llvm::function_ref<void(CodeGenFunction &)> &BodyGen);
+
 private:
 
   /// Helpers for the OpenMP loop directives.
   void EmitOMPLoopBody(const OMPLoopDirective &Directive,
                        bool SeparateIter = false);
-  void
-  EmitOMPInnerLoop(const Stmt &S, bool RequiresCleanup, const Expr *LoopCond,
-                   const Expr *IncExpr,
-                   const llvm::function_ref<void(CodeGenFunction &)> &BodyGen);
   void EmitOMPSimdFinal(const OMPLoopDirective &S);
   void EmitOMPWorksharingLoop(const OMPLoopDirective &S);
   void EmitOMPForOuterLoop(OpenMPScheduleClauseKind ScheduleKind,