| //===-- SystemZRegisterInfo.h - SystemZ register information ----*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZREGISTERINFO_H |
| #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZREGISTERINFO_H |
| |
| #include "SystemZ.h" |
| #include "llvm/CodeGen/TargetRegisterInfo.h" |
| |
| #define GET_REGINFO_HEADER |
| #include "SystemZGenRegisterInfo.inc" |
| |
| namespace llvm { |
| |
| class LiveIntervals; |
| |
| namespace SystemZ { |
| // Return the subreg to use for referring to the even and odd registers |
| // in a GR128 pair. Is32Bit says whether we want a GR32 or GR64. |
| inline unsigned even128(bool Is32bit) { |
| return Is32bit ? subreg_hl32 : subreg_h64; |
| } |
| inline unsigned odd128(bool Is32bit) { |
| return Is32bit ? subreg_l32 : subreg_l64; |
| } |
| } // end namespace SystemZ |
| |
| struct SystemZRegisterInfo : public SystemZGenRegisterInfo { |
| public: |
| SystemZRegisterInfo(); |
| |
| /// getPointerRegClass - Return the register class to use to hold pointers. |
| /// This is currently only used by LOAD_STACK_GUARD, which requires a non-%r0 |
| /// register, hence ADDR64. |
| const TargetRegisterClass * |
| getPointerRegClass(const MachineFunction &MF, |
| unsigned Kind=0) const override { |
| return &SystemZ::ADDR64BitRegClass; |
| } |
| |
| /// getCrossCopyRegClass - Returns a legal register class to copy a register |
| /// in the specified class to or from. Returns NULL if it is possible to copy |
| /// between a two registers of the specified class. |
| const TargetRegisterClass * |
| getCrossCopyRegClass(const TargetRegisterClass *RC) const override; |
| |
| bool getRegAllocationHints(unsigned VirtReg, |
| ArrayRef<MCPhysReg> Order, |
| SmallVectorImpl<MCPhysReg> &Hints, |
| const MachineFunction &MF, |
| const VirtRegMap *VRM, |
| const LiveRegMatrix *Matrix) const override; |
| |
| // Override TargetRegisterInfo.h. |
| bool requiresRegisterScavenging(const MachineFunction &MF) const override { |
| return true; |
| } |
| bool requiresFrameIndexScavenging(const MachineFunction &MF) const override { |
| return true; |
| } |
| bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override { |
| return true; |
| } |
| const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override; |
| const uint32_t *getCallPreservedMask(const MachineFunction &MF, |
| CallingConv::ID CC) const override; |
| BitVector getReservedRegs(const MachineFunction &MF) const override; |
| void eliminateFrameIndex(MachineBasicBlock::iterator MI, |
| int SPAdj, unsigned FIOperandNum, |
| RegScavenger *RS) const override; |
| |
| /// SrcRC and DstRC will be morphed into NewRC if this returns true. |
| bool shouldCoalesce(MachineInstr *MI, |
| const TargetRegisterClass *SrcRC, |
| unsigned SubReg, |
| const TargetRegisterClass *DstRC, |
| unsigned DstSubReg, |
| const TargetRegisterClass *NewRC, |
| LiveIntervals &LIS) const override; |
| |
| unsigned getFrameRegister(const MachineFunction &MF) const override; |
| }; |
| |
| } // end namespace llvm |
| |
| #endif |