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diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
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+//===-- ScheduleDAG.cpp - Implement a trivial DAG scheduler ---------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by Chris Lattner and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This implements a simple code linearizer for DAGs. This is not a very good
+// way to emit code, but gets working code quickly.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "sched"
+#include "llvm/CodeGen/SelectionDAGISel.h"
+using namespace llvm;
+
+/// Pick a safe ordering and emit instructions for each target node in the
+/// graph.
+void SelectionDAGISel::ScheduleAndEmitDAG(SelectionDAG &SD) {
+
+}