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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
90 lines
3.6 KiB
C++
90 lines
3.6 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,
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bool PreferFP = false) 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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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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