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ef03e5a8d3
Summary: Avoid special case for FP, LR CFI emission and just allow general AArch64FrameLowering::emitCalleeSavedFrameMoves() to handle them. Also, stop recalculating the stack offsets in emitCalleeSavedFrameMoves() since we can just reuse the previously calculated offset stored in the MachineFrameInfo. Depends on D17000 Reviewers: t.p.northover, rengolin, mcrosier, jmolloy Subscribers: aemerson, rengolin, mcrosier, llvm-commits Differential Revision: http://reviews.llvm.org/D17004 llvm-svn: 261885
74 lines
2.9 KiB
C++
74 lines
2.9 KiB
C++
//==-- AArch64FrameLowering.h - TargetFrameLowering for AArch64 --*- C++ -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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/Target/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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void eliminateCallFramePseudoInstr(MachineFunction &MF,
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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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const std::vector<CalleeSavedInfo> &CSI,
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const TargetRegisterInfo *TRI) const override;
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/// \brief 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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};
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} // End llvm namespace
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#endif
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