| 1 | //=- LoongArchFrameLowering.h - TargetFrameLowering for LoongArch -*- C++ -*--// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This class implements LoongArch-specific bits of TargetFrameLowering class. |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |
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| 13 | #ifndef LLVM_LIB_TARGET_LOONGARCH_LOONGARCHFRAMELOWERING_H |
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| 14 | #define LLVM_LIB_TARGET_LOONGARCH_LOONGARCHFRAMELOWERING_H |
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| 15 | |
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| 16 | #include "llvm/CodeGen/TargetFrameLowering.h" |
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| 17 | |
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| 18 | namespace llvm { |
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| 19 | class LoongArchSubtarget; |
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| 20 | |
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| 21 | class LoongArchFrameLowering : public TargetFrameLowering { |
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| 22 | const LoongArchSubtarget &STI; |
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| 23 | |
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| 24 | public: |
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| 25 | explicit LoongArchFrameLowering(const LoongArchSubtarget &STI) |
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| 26 | : TargetFrameLowering(StackGrowsDown, |
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| 27 | /*StackAlignment=*/Align(16), |
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| 28 | /*LocalAreaOffset=*/0), |
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| 29 | STI(STI) {} |
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| 30 | |
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| 31 | void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override; |
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| 32 | void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; |
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| 33 | |
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| 34 | void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, |
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| 35 | RegScavenger *RS) const override; |
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| 36 | |
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| 37 | void processFunctionBeforeFrameFinalized(MachineFunction &MF, |
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| 38 | RegScavenger *RS) const override; |
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| 39 | |
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| 40 | bool hasReservedCallFrame(const MachineFunction &MF) const override; |
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| 41 | MachineBasicBlock::iterator |
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| 42 | eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, |
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| 43 | MachineBasicBlock::iterator MI) const override; |
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| 44 | bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, |
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| 45 | MachineBasicBlock::iterator MI, |
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| 46 | ArrayRef<CalleeSavedInfo> CSI, |
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| 47 | const TargetRegisterInfo *TRI) const override; |
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| 48 | |
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| 49 | StackOffset getFrameIndexReference(const MachineFunction &MF, int FI, |
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| 50 | Register &FrameReg) const override; |
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| 51 | |
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| 52 | bool hasFP(const MachineFunction &MF) const override; |
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| 53 | bool hasBP(const MachineFunction &MF) const; |
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| 54 | |
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| 55 | uint64_t getFirstSPAdjustAmount(const MachineFunction &MF) const; |
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| 56 | |
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| 57 | bool enableShrinkWrapping(const MachineFunction &MF) const override; |
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| 58 | |
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| 59 | private: |
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| 60 | void determineFrameLayout(MachineFunction &MF) const; |
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| 61 | void adjustReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, |
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| 62 | const DebugLoc &DL, Register DestReg, Register SrcReg, |
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| 63 | int64_t Val, MachineInstr::MIFlag Flag) const; |
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| 64 | }; |
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| 65 | } // end namespace llvm |
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| 66 | #endif // LLVM_LIB_TARGET_LOONGARCH_LOONGARCHFRAMELOWERING_H |
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| 67 | |
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