32452487ae
Split AArch64FrameLowering::resolveFrameIndexReference in two parts * Finding frame offset for the index. * Finding base register and offset to that register. The second part will be used to implement a virtual frame pointer in armv8.5 MTE stack instrumentation lowering. Reviewers: pcc, vitalybuka, hctim, ostannard Subscribers: javed.absar, kristof.beyls, hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D64171 llvm-svn: 365958
96 lines
4.0 KiB
C++
96 lines
4.0 KiB
C++
//==-- AArch64FrameLowering.h - TargetFrameLowering for AArch64 --*- C++ -*-==//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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//
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_AARCH64_AARCH64FRAMELOWERING_H
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#define LLVM_LIB_TARGET_AARCH64_AARCH64FRAMELOWERING_H
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#include "llvm/CodeGen/TargetFrameLowering.h"
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namespace llvm {
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class AArch64FrameLowering : public TargetFrameLowering {
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public:
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explicit AArch64FrameLowering()
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: TargetFrameLowering(StackGrowsDown, 16, 0, 16,
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true /*StackRealignable*/) {}
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void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MBBI) const;
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MachineBasicBlock::iterator
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eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I) const override;
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/// emitProlog/emitEpilog - These methods insert prolog and epilog code into
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/// the function.
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void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
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void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
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bool canUseAsPrologue(const MachineBasicBlock &MBB) const override;
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int getFrameIndexReference(const MachineFunction &MF, int FI,
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unsigned &FrameReg) const override;
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int resolveFrameIndexReference(const MachineFunction &MF, int FI,
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unsigned &FrameReg, bool PreferFP,
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bool ForSimm) const;
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int resolveFrameOffsetReference(const MachineFunction &MF, int ObjectOffset,
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bool isFixed, unsigned &FrameReg,
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bool PreferFP, bool ForSimm) const;
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bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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const std::vector<CalleeSavedInfo> &CSI,
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const TargetRegisterInfo *TRI) const override;
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bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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std::vector<CalleeSavedInfo> &CSI,
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const TargetRegisterInfo *TRI) const override;
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/// Can this function use the red zone for local allocations.
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bool canUseRedZone(const MachineFunction &MF) const;
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bool hasFP(const MachineFunction &MF) const override;
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bool hasReservedCallFrame(const MachineFunction &MF) const override;
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void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
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RegScavenger *RS) const override;
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/// Returns true if the target will correctly handle shrink wrapping.
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bool enableShrinkWrapping(const MachineFunction &MF) const override {
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return true;
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}
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bool enableStackSlotScavenging(const MachineFunction &MF) const override;
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void processFunctionBeforeFrameFinalized(MachineFunction &MF,
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RegScavenger *RS) const override;
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unsigned getWinEHParentFrameOffset(const MachineFunction &MF) const override;
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unsigned getWinEHFuncletFrameSize(const MachineFunction &MF) const;
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int getFrameIndexReferencePreferSP(const MachineFunction &MF, int FI,
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unsigned &FrameReg,
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bool IgnoreSPUpdates) const override;
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int getNonLocalFrameIndexReference(const MachineFunction &MF,
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int FI) const override;
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int getSEHFrameIndexOffset(const MachineFunction &MF, int FI) const;
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private:
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bool shouldCombineCSRLocalStackBump(MachineFunction &MF,
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unsigned StackBumpBytes) const;
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};
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} // End llvm namespace
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#endif
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