1 files changed, 66 insertions, 0 deletions
diff --git a/llvm/lib/Target/Hexagon/HexagonBitTracker.h b/llvm/lib/Target/Hexagon/HexagonBitTracker.h
new file mode 100644
index 00000000000..340c3090044
--- /dev/null
+++ b/llvm/lib/Target/Hexagon/HexagonBitTracker.h
@@ -0,0 +1,66 @@
+//===--- HexagonBitTracker.h ----------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef HEXAGONBITTRACKER_H
+#define HEXAGONBITTRACKER_H
+
+#include "BitTracker.h"
+#include "llvm/ADT/DenseMap.h"
+
+namespace llvm {
+  class HexagonInstrInfo;
+  class HexagonRegisterInfo;
+}
+
+struct HexagonEvaluator : public BitTracker::MachineEvaluator {
+  typedef BitTracker::CellMapType CellMapType;
+  typedef BitTracker::RegisterRef RegisterRef;
+  typedef BitTracker::RegisterCell RegisterCell;
+  typedef BitTracker::BranchTargetList BranchTargetList;
+
+  HexagonEvaluator(const llvm::HexagonRegisterInfo &tri,
+        llvm::MachineRegisterInfo &mri, const llvm::HexagonInstrInfo &tii,
+        llvm::MachineFunction &mf);
+
+  virtual bool evaluate(const llvm::MachineInstr *MI,
+        const CellMapType &Inputs, CellMapType &Outputs) const;
+  virtual bool evaluate(const llvm::MachineInstr *BI,
+        const CellMapType &Inputs, BranchTargetList &Targets,
+        bool &FallsThru) const;
+
+  virtual BitTracker::BitMask mask(unsigned Reg, unsigned Sub) const;
+
+  llvm::MachineFunction &MF;
+  llvm::MachineFrameInfo &MFI;
+  const llvm::HexagonInstrInfo &TII;
+
+private:
+  bool evaluateLoad(const llvm::MachineInstr *MI, const CellMapType &Inputs,
+        CellMapType &Outputs) const;
+  bool evaluateFormalCopy(const llvm::MachineInstr *MI,
+        const CellMapType &Inputs, CellMapType &Outputs) const;
+
+  unsigned getNextPhysReg(unsigned PReg, unsigned Width) const;
+  unsigned getVirtRegFor(unsigned PReg) const;
+
+  // Type of formal parameter extension.
+  struct ExtType {
+    enum { SExt, ZExt };
+    char Type;
+    uint16_t Width;
+    ExtType() : Type(0), Width(0) {}
+    ExtType(char t, uint16_t w) : Type(t), Width(w) {}
+  };
+  // Map VR -> extension type.
+  typedef llvm::DenseMap<unsigned,ExtType> RegExtMap;
+  RegExtMap VRX;
+};
+
+#endif
+