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34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
//===----------------------- SIFrameLowering.cpp --------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//==-----------------------------------------------------------------------===//
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#include "SIFrameLowering.h"
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#include "SIRegisterInfo.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/RegisterScavenging.h"
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using namespace llvm;
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void SIFrameLowering::processFunctionBeforeFrameFinalized(
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MachineFunction &MF,
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RegScavenger *RS) const {
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MachineFrameInfo *MFI = MF.getFrameInfo();
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bool MayNeedScavengingEmergencySlot = MFI->hasStackObjects();
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assert((RS || !MayNeedScavengingEmergencySlot) &&
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"RegScavenger required if spilling");
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if (MayNeedScavengingEmergencySlot) {
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int ScavengeFI = MFI->CreateSpillStackObject(
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AMDGPU::SGPR_32RegClass.getSize(),
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AMDGPU::SGPR_32RegClass.getAlignment());
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RS->addScavengingFrameIndex(ScavengeFI);
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}
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}
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