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78 lines
2.8 KiB
C++
78 lines
2.8 KiB
C++
//===- ARCFrameLowering.h - Define frame lowering for ARC -------*- 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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// This class implements the ARC specific frame lowering.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_ARC_ARCFRAMELOWERING_H
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#define LLVM_LIB_TARGET_ARC_ARCFRAMELOWERING_H
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#include "ARC.h"
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#include "llvm/CodeGen/MachineBasicBlock.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/TargetFrameLowering.h"
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namespace llvm {
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class MachineFunction;
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class ARCSubtarget;
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class ARCInstrInfo;
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class ARCFrameLowering : public TargetFrameLowering {
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public:
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ARCFrameLowering(const ARCSubtarget &st)
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: TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 4, 0), ST(st) {
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}
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/// Insert Prologue into the function.
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void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
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/// Insert Epilogue into the function.
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void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
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/// Add explicit callee save registers.
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void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
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RegScavenger *RS) const override;
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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
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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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void processFunctionBeforeFrameFinalized(MachineFunction &MF,
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RegScavenger *RS) const override;
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bool hasFP(const MachineFunction &MF) 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 assignCalleeSavedSpillSlots(
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llvm::MachineFunction &, const llvm::TargetRegisterInfo *,
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std::vector<llvm::CalleeSavedInfo> &) const override;
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private:
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void adjustStackToMatchRecords(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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bool allocate) const;
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const ARCSubtarget &ST;
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};
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_ARC_ARCFRAMELOWERING_H
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