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diff --git a/contrib/llvm/lib/Target/PowerPC/PPCHazardRecognizers.h b/contrib/llvm/lib/Target/PowerPC/PPCHazardRecognizers.h
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+//===-- PPCHazardRecognizers.h - PowerPC Hazard Recognizers -----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines hazard recognizers for scheduling on PowerPC processors.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef PPCHAZRECS_H
+#define PPCHAZRECS_H
+
+#include "llvm/CodeGen/ScheduleHazardRecognizer.h"
+#include "llvm/CodeGen/SelectionDAGNodes.h"
+#include "PPCInstrInfo.h"
+
+namespace llvm {
+  
+/// PPCHazardRecognizer970 - This class defines a finite state automata that
+/// models the dispatch logic on the PowerPC 970 (aka G5) processor.  This
+/// promotes good dispatch group formation and implements noop insertion to
+/// avoid structural hazards that cause significant performance penalties (e.g.
+/// setting the CTR register then branching through it within a dispatch group),
+/// or storing then loading from the same address within a dispatch group.
+class PPCHazardRecognizer970 : public ScheduleHazardRecognizer {
+  const TargetInstrInfo &TII;
+  
+  unsigned NumIssued;  // Number of insts issued, including advanced cycles.
+  
+  // Various things that can cause a structural hazard.
+  
+  // HasCTRSet - If the CTR register is set in this group, disallow BCTRL.
+  bool HasCTRSet;
+  
+  // StoredPtr - Keep track of the address of any store.  If we see a load from
+  // the same address (or one that aliases it), disallow the store.  We can have
+  // up to four stores in one dispatch group, hence we track up to 4.
+  //
+  // This is null if we haven't seen a store yet.  We keep track of both
+  // operands of the store here, since we support [r+r] and [r+i] addressing.
+  SDValue StorePtr1[4], StorePtr2[4];
+  unsigned  StoreSize[4];
+  unsigned NumStores;
+  
+public:
+  PPCHazardRecognizer970(const TargetInstrInfo &TII);
+  virtual HazardType getHazardType(SUnit *SU);
+  virtual void EmitInstruction(SUnit *SU);
+  virtual void AdvanceCycle();
+  
+private:
+  /// EndDispatchGroup - Called when we are finishing a new dispatch group.
+  ///
+  void EndDispatchGroup();
+  
+  /// GetInstrType - Classify the specified powerpc opcode according to its
+  /// pipeline.
+  PPCII::PPC970_Unit GetInstrType(unsigned Opcode,
+                                  bool &isFirst, bool &isSingle,bool &isCracked,
+                                  bool &isLoad, bool &isStore);
+  
+  bool isLoadOfStoredAddress(unsigned LoadSize,
+                             SDValue Ptr1, SDValue Ptr2) const;
+};
+
+} // end namespace llvm
+
+#endif
+