ad4a582fd9
Some targets (e.g. PPC and Hexagon) already did this. I think it's best to do this consistently so that frontend authors don't run into inconsistent results when they emit `naked` functions. For example, in Zig, we had to change our emit code to also set `frame-pointer=none` to get reliable results across targets. Note: I don't have commit access.
94 lines
4.0 KiB
C++
94 lines
4.0 KiB
C++
//===--------------------- SIFrameLowering.h --------------------*- 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_AMDGPU_SIFRAMELOWERING_H
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#define LLVM_LIB_TARGET_AMDGPU_SIFRAMELOWERING_H
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#include "AMDGPUFrameLowering.h"
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#include "SIRegisterInfo.h"
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namespace llvm {
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class SIFrameLowering final : public AMDGPUFrameLowering {
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public:
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SIFrameLowering(StackDirection D, Align StackAl, int LAO,
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Align TransAl = Align(1))
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: AMDGPUFrameLowering(D, StackAl, LAO, TransAl) {}
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~SIFrameLowering() override = default;
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void emitEntryFunctionPrologue(MachineFunction &MF,
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MachineBasicBlock &MBB) const;
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void emitPrologue(MachineFunction &MF,
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MachineBasicBlock &MBB) const override;
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void emitEpilogue(MachineFunction &MF,
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MachineBasicBlock &MBB) const override;
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StackOffset getFrameIndexReference(const MachineFunction &MF, int FI,
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Register &FrameReg) const override;
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void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
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RegScavenger *RS = nullptr) const override;
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void determineCalleeSavesSGPR(MachineFunction &MF, BitVector &SavedRegs,
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RegScavenger *RS = nullptr) const;
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void determinePrologEpilogSGPRSaves(MachineFunction &MF, BitVector &SavedRegs,
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bool NeedExecCopyReservedReg) const;
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void emitCSRSpillStores(MachineFunction &MF, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MBBI, DebugLoc &DL,
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LiveRegUnits &LiveUnits, Register FrameReg,
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Register FramePtrRegScratchCopy) const;
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void emitCSRSpillRestores(MachineFunction &MF, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MBBI, DebugLoc &DL,
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LiveRegUnits &LiveUnits, Register FrameReg,
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Register FramePtrRegScratchCopy) const;
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bool
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assignCalleeSavedSpillSlots(MachineFunction &MF,
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const TargetRegisterInfo *TRI,
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std::vector<CalleeSavedInfo> &CSI) const override;
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bool allocateScavengingFrameIndexesNearIncomingSP(
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const MachineFunction &MF) const override;
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bool isSupportedStackID(TargetStackID::Value ID) const override;
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void processFunctionBeforeFrameFinalized(
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MachineFunction &MF,
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RegScavenger *RS = nullptr) const override;
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void processFunctionBeforeFrameIndicesReplaced(
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MachineFunction &MF, RegScavenger *RS = nullptr) const override;
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MachineBasicBlock::iterator
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eliminateCallFramePseudoInstr(MachineFunction &MF,
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MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI) const override;
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protected:
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bool hasFPImpl(const MachineFunction &MF) const override;
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private:
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void emitEntryFunctionFlatScratchInit(MachineFunction &MF,
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MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I,
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const DebugLoc &DL,
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Register ScratchWaveOffsetReg) const;
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Register getEntryFunctionReservedScratchRsrcReg(MachineFunction &MF) const;
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void emitEntryFunctionScratchRsrcRegSetup(
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MachineFunction &MF, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I, const DebugLoc &DL,
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Register PreloadedPrivateBufferReg, Register ScratchRsrcReg,
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Register ScratchWaveOffsetReg) const;
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public:
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bool requiresStackPointerReference(const MachineFunction &MF) const;
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};
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_AMDGPU_SIFRAMELOWERING_H
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