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annotate lib/Target/Hexagon/HexagonBitTracker.h @ 95:afa8332a0e37 LLVM3.8

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LLVM 3.8
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Tue, 13 Oct 2015 17:48:58 +0900
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children 1172e4bd9c6f
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95
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1 //===--- HexagonBitTracker.h ----------------------------------------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #ifndef HEXAGONBITTRACKER_H
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11 #define HEXAGONBITTRACKER_H
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12
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13 #include "BitTracker.h"
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14 #include "llvm/ADT/DenseMap.h"
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15
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16 namespace llvm {
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17 class HexagonInstrInfo;
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18 class HexagonRegisterInfo;
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19
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20 struct HexagonEvaluator : public BitTracker::MachineEvaluator {
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21 typedef BitTracker::CellMapType CellMapType;
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22 typedef BitTracker::RegisterRef RegisterRef;
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23 typedef BitTracker::RegisterCell RegisterCell;
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24 typedef BitTracker::BranchTargetList BranchTargetList;
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25
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26 HexagonEvaluator(const HexagonRegisterInfo &tri, MachineRegisterInfo &mri,
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27 const HexagonInstrInfo &tii, MachineFunction &mf);
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28
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29 bool evaluate(const MachineInstr *MI, const CellMapType &Inputs,
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30 CellMapType &Outputs) const override;
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31 bool evaluate(const MachineInstr *BI, const CellMapType &Inputs,
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32 BranchTargetList &Targets, bool &FallsThru) const override;
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33
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34 BitTracker::BitMask mask(unsigned Reg, unsigned Sub) const override;
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35
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36 MachineFunction &MF;
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37 MachineFrameInfo &MFI;
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38 const HexagonInstrInfo &TII;
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39
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40 private:
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41 bool evaluateLoad(const MachineInstr *MI, const CellMapType &Inputs,
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42 CellMapType &Outputs) const;
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43 bool evaluateFormalCopy(const MachineInstr *MI, const CellMapType &Inputs,
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44 CellMapType &Outputs) const;
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45
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46 unsigned getNextPhysReg(unsigned PReg, unsigned Width) const;
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47 unsigned getVirtRegFor(unsigned PReg) const;
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48
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49 // Type of formal parameter extension.
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50 struct ExtType {
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51 enum { SExt, ZExt };
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52 char Type;
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53 uint16_t Width;
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54 ExtType() : Type(0), Width(0) {}
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55 ExtType(char t, uint16_t w) : Type(t), Width(w) {}
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56 };
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57 // Map VR -> extension type.
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58 typedef DenseMap<unsigned, ExtType> RegExtMap;
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59 RegExtMap VRX;
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60 };
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61
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62 } // end namespace llvm
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63
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64 #endif