add an emitnoop method

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26563 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/CodeGen/ScheduleDAG.h b/include/llvm/CodeGen/ScheduleDAG.h
index cbb7a1e31a9b0e74f4db3b0181e0432c0ac9e6b3..dee706def2810b01461855bf2bf22401115c2f23 100644 (file)
--- a/include/llvm/CodeGen/ScheduleDAG.h
+++ b/include/llvm/CodeGen/ScheduleDAG.h
@@ -308,14 +308,18 @@ namespace llvm {
     /// EmitNode - Generate machine code for an node and needed dependencies.
     ///
     void EmitNode(NodeInfo *NI);
-
+    
+    /// EmitNoop - Emit a noop instruction.
+    ///
+    void EmitNoop();
+    
     /// EmitAll - Emit all nodes in schedule sorted order.
     ///
     void EmitAll();
 
     /// Schedule - Order nodes according to selected style.
     ///
-    virtual void Schedule() {};
+    virtual void Schedule() {}
 
     /// printNI - Print node info.
     ///