Mark most PPC register classes to avoid write-after-write.

[oota-llvm.git] / lib / Target / PowerPC / PPCHazardRecognizers.h

diff --git a/lib/Target/PowerPC/PPCHazardRecognizers.h b/lib/Target/PowerPC/PPCHazardRecognizers.h
index 2f81f0f7c7f1b0e42f6abb3b2c37392cf16a02ec..55b45d01b20ee4addec80592335bb77e6ffb8ec7 100644 (file)
--- a/lib/Target/PowerPC/PPCHazardRecognizers.h
+++ b/lib/Target/PowerPC/PPCHazardRecognizers.h
@@ -14,12 +14,28 @@
 #ifndef PPCHAZRECS_H
 #define PPCHAZRECS_H
 
+#include "PPCInstrInfo.h"
 #include "llvm/CodeGen/ScheduleHazardRecognizer.h"
+#include "llvm/CodeGen/ScoreboardHazardRecognizer.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
-#include "PPCInstrInfo.h"
 
 namespace llvm {
 
+/// PPCScoreboardHazardRecognizer - This class implements a scoreboard-based
+/// hazard recognizer for generic PPC processors.
+class PPCScoreboardHazardRecognizer : public ScoreboardHazardRecognizer {
+  const ScheduleDAG *DAG;
+public:
+  PPCScoreboardHazardRecognizer(const InstrItineraryData *ItinData,
+                         const ScheduleDAG *DAG_) :
+    ScoreboardHazardRecognizer(ItinData, DAG_), DAG(DAG_) {}
+
+  virtual HazardType getHazardType(SUnit *SU, int Stalls);
+  virtual void EmitInstruction(SUnit *SU);
+  virtual void AdvanceCycle();
+  virtual void Reset();
+};
+
 /// 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
@@ -42,8 +58,9 @@ class PPCHazardRecognizer970 : public ScheduleHazardRecognizer {
   //
   // 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];
+  const Value *StoreValue[4];
+  int64_t StoreOffset[4];
+  uint64_t StoreSize[4];
   unsigned NumStores;
 
 public:
@@ -51,6 +68,7 @@ public:
   virtual HazardType getHazardType(SUnit *SU, int Stalls);
   virtual void EmitInstruction(SUnit *SU);
   virtual void AdvanceCycle();
+  virtual void Reset();
 
 private:
   /// EndDispatchGroup - Called when we are finishing a new dispatch group.
@@ -63,8 +81,8 @@ private:
                                   bool &isFirst, bool &isSingle,bool &isCracked,
                                   bool &isLoad, bool &isStore);
 
-  bool isLoadOfStoredAddress(unsigned LoadSize,
-                             SDValue Ptr1, SDValue Ptr2) const;
+  bool isLoadOfStoredAddress(uint64_t LoadSize, int64_t LoadOffset,
+                             const Value *LoadValue) const;
 };
 
 } // end namespace llvm