| 1 | //===-- LanaiFrameLowering.h - Define frame lowering for Lanai --*- 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 Lanai-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_LANAI_LANAIFRAMELOWERING_H |
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| 14 | #define LLVM_LIB_TARGET_LANAI_LANAIFRAMELOWERING_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 | |
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| 20 | class BitVector; |
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| 21 | class LanaiSubtarget; |
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| 22 | |
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| 23 | class LanaiFrameLowering : public TargetFrameLowering { |
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| 24 | private: |
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| 25 | void determineFrameLayout(MachineFunction &MF) const; |
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| 26 | void replaceAdjDynAllocPseudo(MachineFunction &MF) const; |
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| 27 | |
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| 28 | protected: |
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| 29 | const LanaiSubtarget &STI; |
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| 30 | |
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| 31 | public: |
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| 32 | explicit LanaiFrameLowering(const LanaiSubtarget &Subtarget) |
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| 33 | : TargetFrameLowering(StackGrowsDown, |
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| 34 | /*StackAlignment=*/Align(8), |
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| 35 | /*LocalAreaOffset=*/0), |
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| 36 | STI(Subtarget) {} |
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| 37 | |
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| 38 | // emitProlog/emitEpilog - These methods insert prolog and epilog code into |
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| 39 | // the function. |
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| 40 | void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override; |
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| 41 | void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; |
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| 42 | |
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| 43 | MachineBasicBlock::iterator |
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| 44 | eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, |
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| 45 | MachineBasicBlock::iterator I) const override; |
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| 46 | |
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| 47 | bool hasFP(const MachineFunction & /*MF*/) const override { return true; } |
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| 48 | |
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| 49 | void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, |
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| 50 | RegScavenger *RS = nullptr) const override; |
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| 51 | }; |
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| 52 | |
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| 53 | } // namespace llvm |
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| 54 | |
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| 55 | #endif // LLVM_LIB_TARGET_LANAI_LANAIFRAMELOWERING_H |
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| 56 | |
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