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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
59 lines
2.5 KiB
C++
59 lines
2.5 KiB
C++
//===-- SystemZFrameLowering.h - Frame lowering for SystemZ -----*- 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_SYSTEMZ_SYSTEMZFRAMELOWERING_H
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#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZFRAMELOWERING_H
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#include "llvm/ADT/IndexedMap.h"
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#include "llvm/CodeGen/TargetFrameLowering.h"
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namespace llvm {
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class SystemZTargetMachine;
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class SystemZSubtarget;
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class SystemZFrameLowering : public TargetFrameLowering {
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IndexedMap<unsigned> RegSpillOffsets;
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public:
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SystemZFrameLowering();
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// Override TargetFrameLowering.
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bool isFPCloseToIncomingSP() const override { return false; }
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const SpillSlot *getCalleeSavedSpillSlots(unsigned &NumEntries) const
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override;
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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 MBBI,
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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 MBBII,
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std::vector<CalleeSavedInfo> &CSI,
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const TargetRegisterInfo *TRI) const
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override;
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void processFunctionBeforeFrameFinalized(MachineFunction &MF,
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RegScavenger *RS) const override;
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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 hasFP(const MachineFunction &MF) const override;
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bool hasReservedCallFrame(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 MI) const override;
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// Return the byte offset from the incoming stack pointer of Reg's
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// ABI-defined save slot. Return 0 if no slot is defined for Reg.
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unsigned getRegSpillOffset(unsigned Reg) const {
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return RegSpillOffsets[Reg];
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}
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};
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} // end namespace llvm
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#endif
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