1 //===- HexagonBitTracker.h --------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_LIB_TARGET_HEXAGON_HEXAGONBITTRACKER_H 10 #define LLVM_LIB_TARGET_HEXAGON_HEXAGONBITTRACKER_H 11 12 #include "BitTracker.h" 13 #include "llvm/ADT/DenseMap.h" 14 #include <cstdint> 15 16 namespace llvm { 17 18 class HexagonInstrInfo; 19 class HexagonRegisterInfo; 20 class MachineFrameInfo; 21 class MachineFunction; 22 class MachineInstr; 23 class MachineRegisterInfo; 24 25 struct HexagonEvaluator : public BitTracker::MachineEvaluator { 26 using CellMapType = BitTracker::CellMapType; 27 using RegisterRef = BitTracker::RegisterRef; 28 using RegisterCell = BitTracker::RegisterCell; 29 using BranchTargetList = BitTracker::BranchTargetList; 30 31 HexagonEvaluator(const HexagonRegisterInfo &tri, MachineRegisterInfo &mri, 32 const HexagonInstrInfo &tii, MachineFunction &mf); 33 34 bool evaluate(const MachineInstr &MI, const CellMapType &Inputs, 35 CellMapType &Outputs) const override; 36 bool evaluate(const MachineInstr &BI, const CellMapType &Inputs, 37 BranchTargetList &Targets, bool &FallsThru) const override; 38 39 BitTracker::BitMask mask(Register Reg, unsigned Sub) const override; 40 41 uint16_t getPhysRegBitWidth(MCRegister Reg) const override; 42 43 const TargetRegisterClass &composeWithSubRegIndex( 44 const TargetRegisterClass &RC, unsigned Idx) const override; 45 46 MachineFunction &MF; 47 MachineFrameInfo &MFI; 48 const HexagonInstrInfo &TII; 49 50 private: 51 unsigned getUniqueDefVReg(const MachineInstr &MI) const; 52 bool evaluateLoad(const MachineInstr &MI, const CellMapType &Inputs, 53 CellMapType &Outputs) const; 54 bool evaluateFormalCopy(const MachineInstr &MI, const CellMapType &Inputs, 55 CellMapType &Outputs) const; 56 57 unsigned getNextPhysReg(unsigned PReg, unsigned Width) const; 58 unsigned getVirtRegFor(unsigned PReg) const; 59 60 // Type of formal parameter extension. 61 struct ExtType { 62 enum { SExt, ZExt }; 63 64 ExtType() = default; 65 ExtType(char t, uint16_t w) : Type(t), Width(w) {} 66 67 char Type = 0; 68 uint16_t Width = 0; 69 }; 70 // Map VR -> extension type. 71 using RegExtMap = DenseMap<unsigned, ExtType>; 72 RegExtMap VRX; 73 }; 74 75 } // end namespace llvm 76 77 #endif // LLVM_LIB_TARGET_HEXAGON_HEXAGONBITTRACKER_H 78