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2addf067a2
We have a detailed def/use lists for every physical register in MachineRegisterInfo anyway, so there is little use in maintaining an additional bitset of which ones are used. Removing it frees us from extra book keeping. This simplifies VirtRegMap. Differential Revision: http://reviews.llvm.org/D10911 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242173 91177308-0d34-0410-b5e6-96231b3b80d8
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
//===-- SIMachineFunctionInfo.cpp - SI Machine Function Info -------===//
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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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/// \file
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//===----------------------------------------------------------------------===//
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#include "SIMachineFunctionInfo.h"
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#include "AMDGPUSubtarget.h"
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#include "SIInstrInfo.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/LLVMContext.h"
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#define MAX_LANES 64
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using namespace llvm;
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// Pin the vtable to this file.
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void SIMachineFunctionInfo::anchor() {}
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SIMachineFunctionInfo::SIMachineFunctionInfo(const MachineFunction &MF)
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: AMDGPUMachineFunction(MF),
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TIDReg(AMDGPU::NoRegister),
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HasSpilledVGPRs(false),
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PSInputAddr(0),
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NumUserSGPRs(0),
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LDSWaveSpillSize(0) { }
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SIMachineFunctionInfo::SpilledReg SIMachineFunctionInfo::getSpilledReg(
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MachineFunction *MF,
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unsigned FrameIndex,
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unsigned SubIdx) {
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const MachineFrameInfo *FrameInfo = MF->getFrameInfo();
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const SIRegisterInfo *TRI = static_cast<const SIRegisterInfo *>(
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MF->getSubtarget<AMDGPUSubtarget>().getRegisterInfo());
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MachineRegisterInfo &MRI = MF->getRegInfo();
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int64_t Offset = FrameInfo->getObjectOffset(FrameIndex);
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Offset += SubIdx * 4;
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unsigned LaneVGPRIdx = Offset / (64 * 4);
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unsigned Lane = (Offset / 4) % 64;
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struct SpilledReg Spill;
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if (!LaneVGPRs.count(LaneVGPRIdx)) {
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unsigned LaneVGPR = TRI->findUnusedRegister(MRI, &AMDGPU::VGPR_32RegClass);
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LaneVGPRs[LaneVGPRIdx] = LaneVGPR;
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// Add this register as live-in to all blocks to avoid machine verifer
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// complaining about use of an undefined physical register.
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for (MachineFunction::iterator BI = MF->begin(), BE = MF->end();
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BI != BE; ++BI) {
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BI->addLiveIn(LaneVGPR);
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}
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}
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Spill.VGPR = LaneVGPRs[LaneVGPRIdx];
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Spill.Lane = Lane;
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return Spill;
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}
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unsigned SIMachineFunctionInfo::getMaximumWorkGroupSize(
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const MachineFunction &MF) const {
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const AMDGPUSubtarget &ST = MF.getSubtarget<AMDGPUSubtarget>();
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// FIXME: We should get this information from kernel attributes if it
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// is available.
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return getShaderType() == ShaderType::COMPUTE ? 256 : ST.getWavefrontSize();
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}
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