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2f13163a84
This adds a second implementation of the AArch64 architecture to LLVM, accessible in parallel via the "arm64" triple. The plan over the coming weeks & months is to merge the two into a single backend, during which time thorough code review should naturally occur. Everything will be easier with the target in-tree though, hence this commit. llvm-svn: 205090
76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
//===-- ARM64FrameLowering.h - TargetFrameLowering for ARM64 ----*- 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 ARM64_FRAMELOWERING_H
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#define ARM64_FRAMELOWERING_H
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#include "llvm/Target/TargetFrameLowering.h"
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namespace llvm {
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class ARM64Subtarget;
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class ARM64TargetMachine;
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class ARM64FrameLowering : public TargetFrameLowering {
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const ARM64TargetMachine &TM;
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public:
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explicit ARM64FrameLowering(const ARM64TargetMachine &TM,
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const ARM64Subtarget &STI)
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: TargetFrameLowering(StackGrowsDown, 16, 0, 16,
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false /*StackRealignable*/),
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TM(TM) {}
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void emitCalleeSavedFrameMoves(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MBBI,
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unsigned FramePtr) const;
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void eliminateCallFramePseudoInstr(MachineFunction &MF,
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MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I) const;
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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) const;
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void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
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int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
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int getFrameIndexReference(const MachineFunction &MF, int FI,
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unsigned &FrameReg) const;
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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;
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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;
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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;
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bool hasReservedCallFrame(const MachineFunction &MF) const;
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void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
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RegScavenger *RS) const;
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};
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} // End llvm namespace
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#endif
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