+
+ const SpillSlot *getCalleeSavedSpillSlots(unsigned &NumEntries)
+ const override {
+ static const SpillSlot Offsets[] = {
+ { Hexagon::R17, -4 }, { Hexagon::R16, -8 }, { Hexagon::D8, -8 },
+ { Hexagon::R19, -12 }, { Hexagon::R18, -16 }, { Hexagon::D9, -16 },
+ { Hexagon::R21, -20 }, { Hexagon::R20, -24 }, { Hexagon::D10, -24 },
+ { Hexagon::R23, -28 }, { Hexagon::R22, -32 }, { Hexagon::D11, -32 },
+ { Hexagon::R25, -36 }, { Hexagon::R24, -40 }, { Hexagon::D12, -40 },
+ { Hexagon::R27, -44 }, { Hexagon::R26, -48 }, { Hexagon::D13, -48 }
+ };
+ NumEntries = array_lengthof(Offsets);
+ return Offsets;
+ }
+
+ bool assignCalleeSavedSpillSlots(MachineFunction &MF,
+ const TargetRegisterInfo *TRI, std::vector<CalleeSavedInfo> &CSI)
+ const override;
+
+ bool needsAligna(const MachineFunction &MF) const;
+ const MachineInstr *getAlignaInstr(const MachineFunction &MF) const;
+
+ void insertCFIInstructions(MachineFunction &MF) const;
+
+private:
+ typedef std::vector<CalleeSavedInfo> CSIVect;
+
+ void expandAlloca(MachineInstr *AI, const HexagonInstrInfo &TII,
+ unsigned SP, unsigned CF) const;
+ void insertPrologueInBlock(MachineBasicBlock &MBB) const;
+ void insertEpilogueInBlock(MachineBasicBlock &MBB) const;
+ bool insertCSRSpillsInBlock(MachineBasicBlock &MBB, const CSIVect &CSI,
+ const HexagonRegisterInfo &HRI) const;
+ bool insertCSRRestoresInBlock(MachineBasicBlock &MBB, const CSIVect &CSI,
+ const HexagonRegisterInfo &HRI) const;
+ void insertCFIInstructionsAt(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator At) const;
+
+ void adjustForCalleeSavedRegsSpillCall(MachineFunction &MF) const;
+ bool replacePredRegPseudoSpillCode(MachineFunction &MF) const;
+ bool replaceVecPredRegPseudoSpillCode(MachineFunction &MF) const;
+
+ void findShrunkPrologEpilog(MachineFunction &MF, MachineBasicBlock *&PrologB,
+ MachineBasicBlock *&EpilogB) const;
+
+ bool shouldInlineCSR(llvm::MachineFunction &MF, const CSIVect &CSI) const;
+ bool useSpillFunction(MachineFunction &MF, const CSIVect &CSI) const;
+ bool useRestoreFunction(MachineFunction &MF, const CSIVect &CSI) const;