33388ae866
This patch introduces basic tablegen infra such as
LoongArch{InstrFormats,InstrInfo,RegisterInfo,CallingConv,}.td.
For now, only add instruction definitions for LoongArch basic integer
operations.
Our initial target is a working MC layer rather than codegen,
so appropriate SelectionDAG patterns will come later.
Differential revision: https://reviews.llvm.org/D115861
56 lines
2.2 KiB
C++
56 lines
2.2 KiB
C++
//===-- LoongArchFrameLowering.cpp - LoongArch Frame Information -*- 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 file contains the LoongArch implementation of TargetFrameLowering class.
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//
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//===----------------------------------------------------------------------===//
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#include "LoongArchFrameLowering.h"
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#include "LoongArchSubtarget.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/CodeGen/RegisterScavenging.h"
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#include "llvm/IR/DiagnosticInfo.h"
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#include "llvm/MC/MCDwarf.h"
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using namespace llvm;
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#define DEBUG_TYPE "loongarch-frame-lowering"
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// Return true if the specified function should have a dedicated frame
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// pointer register. This is true if frame pointer elimination is
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// disabled, if it needs dynamic stack realignment, if the function has
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// variable sized allocas, or if the frame address is taken.
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bool LoongArchFrameLowering::hasFP(const MachineFunction &MF) const {
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const TargetRegisterInfo *RegInfo = MF.getSubtarget().getRegisterInfo();
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const MachineFrameInfo &MFI = MF.getFrameInfo();
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return MF.getTarget().Options.DisableFramePointerElim(MF) ||
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RegInfo->hasStackRealignment(MF) || MFI.hasVarSizedObjects() ||
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MFI.isFrameAddressTaken();
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}
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bool LoongArchFrameLowering::hasBP(const MachineFunction &MF) const {
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const MachineFrameInfo &MFI = MF.getFrameInfo();
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const TargetRegisterInfo *TRI = STI.getRegisterInfo();
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return MFI.hasVarSizedObjects() && TRI->hasStackRealignment(MF);
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}
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void LoongArchFrameLowering::emitPrologue(MachineFunction &MF,
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MachineBasicBlock &MBB) const {
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// TODO: Implement this when we have function calls
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}
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void LoongArchFrameLowering::emitEpilogue(MachineFunction &MF,
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MachineBasicBlock &MBB) const {
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// TODO: Implement this when we have function calls
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}
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