89c25c54f9
Implement base windowed register call ABI. By defaullt use rotation window by 8 registers.
60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
//===- XtensaFrameLowering.h - Define frame lowering for Xtensa --*- 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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#ifndef LLVM_LIB_TARGET_XTENSA_XTENSAFRAMELOWERING_H
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#define LLVM_LIB_TARGET_XTENSA_XTENSAFRAMELOWERING_H
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#include "llvm/CodeGen/TargetFrameLowering.h"
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namespace llvm {
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class XtensaTargetMachine;
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class XtensaSubtarget;
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class XtensaInstrInfo;
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class XtensaRegisterInfo;
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class XtensaFrameLowering : public TargetFrameLowering {
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const XtensaSubtarget &STI;
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const XtensaInstrInfo &TII;
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const XtensaRegisterInfo *TRI;
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public:
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XtensaFrameLowering(const XtensaSubtarget &STI);
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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 &, MachineBasicBlock &) const override;
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void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
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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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bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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ArrayRef<CalleeSavedInfo> CSI,
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const TargetRegisterInfo *TRI) const override;
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bool
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restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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MutableArrayRef<CalleeSavedInfo> CSI,
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const TargetRegisterInfo *TRI) const override;
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void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
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RegScavenger *RS) const override;
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void processFunctionBeforeFrameFinalized(MachineFunction &MF,
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RegScavenger *RS) const override;
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protected:
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bool hasFPImpl(const MachineFunction &MF) const override;
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};
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} // namespace llvm
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#endif /* LLVM_LIB_TARGET_XTENSA_XTENSAFRAMELOWERING_H */
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