| Matt Arsenault | 0c90e95 | 2015-11-06 18:17:45 +0000 | [diff] [blame] | 1 | //===----------------------- SIFrameLowering.cpp --------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //==-----------------------------------------------------------------------===// |
| 9 | |
| 10 | #include "SIFrameLowering.h" |
| 11 | #include "SIRegisterInfo.h" |
| 12 | #include "llvm/CodeGen/MachineFrameInfo.h" |
| 13 | #include "llvm/CodeGen/MachineFunction.h" |
| 14 | #include "llvm/CodeGen/RegisterScavenging.h" |
| 15 | |
| 16 | using namespace llvm; |
| 17 | |
| 18 | void SIFrameLowering::processFunctionBeforeFrameFinalized( |
| 19 | MachineFunction &MF, |
| 20 | RegScavenger *RS) const { |
| 21 | MachineFrameInfo *MFI = MF.getFrameInfo(); |
| 22 | bool MayNeedScavengingEmergencySlot = MFI->hasStackObjects(); |
| 23 | |
| 24 | assert((RS || !MayNeedScavengingEmergencySlot) && |
| 25 | "RegScavenger required if spilling"); |
| 26 | |
| 27 | if (MayNeedScavengingEmergencySlot) { |
| 28 | int ScavengeFI = MFI->CreateSpillStackObject( |
| 29 | AMDGPU::SGPR_32RegClass.getSize(), |
| 30 | AMDGPU::SGPR_32RegClass.getAlignment()); |
| 31 | RS->addScavengingFrameIndex(ScavengeFI); |
| 32 | } |
| 33 | } |