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usr / src / contrib / llvm-project / llvm / lib / Target / AMDGPU /

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📄 AMDGPU.h(11.46 KB)
📄 AMDGPU.td(36.97 KB)
📄 AMDGPUAliasAnalysis.cpp(5.58 KB)
📄 AMDGPUAliasAnalysis.h(3.32 KB)
📄 AMDGPUAlwaysInlinePass.cpp(4.83 KB)
📄 AMDGPUAnnotateKernelFeatures.cpp(11.94 KB)
📄 AMDGPUAnnotateUniformValues.cpp(6.13 KB)
📄 AMDGPUArgumentUsageInfo.cpp(7.66 KB)
📄 AMDGPUArgumentUsageInfo.h(4.81 KB)
📄 AMDGPUAsmPrinter.cpp(50.42 KB)
📄 AMDGPUAsmPrinter.h(5.13 KB)
📄 AMDGPUAtomicOptimizer.cpp(23.79 KB)
📄 AMDGPUCallLowering.cpp(28.66 KB)
📄 AMDGPUCallLowering.h(2.37 KB)
📄 AMDGPUCallingConv.td(7.33 KB)
📄 AMDGPUCodeGenPrepare.cpp(46.42 KB)
📄 AMDGPUCombine.td(2.79 KB)
📄 AMDGPUExportClustering.cpp(4.52 KB)
📄 AMDGPUExportClustering.h(533 B)
📄 AMDGPUFeatures.td(1.81 KB)
📄 AMDGPUFixFunctionBitcasts.cpp(1.87 KB)
📄 AMDGPUFrameLowering.cpp(1.98 KB)
📄 AMDGPUFrameLowering.h(1.39 KB)
📄 AMDGPUGISel.td(11.57 KB)
📄 AMDGPUGenRegisterBankInfo.def(5.83 KB)
📄 AMDGPUGlobalISelUtils.cpp(1.77 KB)
📄 AMDGPUGlobalISelUtils.h(2.07 KB)
📄 AMDGPUHSAMetadataStreamer.cpp(31.21 KB)
📄 AMDGPUHSAMetadataStreamer.h(5.46 KB)
📄 AMDGPUISelDAGToDAG.cpp(101.59 KB)
📄 AMDGPUISelLowering.cpp(168.65 KB)
📄 AMDGPUISelLowering.h(19.23 KB)
📄 AMDGPUInline.cpp(7.97 KB)
📄 AMDGPUInstrInfo.cpp(1.71 KB)
📄 AMDGPUInstrInfo.h(1.66 KB)
📄 AMDGPUInstrInfo.td(17.18 KB)
📄 AMDGPUInstructionSelector.cpp(128.53 KB)
📄 AMDGPUInstructionSelector.h(11.04 KB)
📄 AMDGPUInstructions.td(25.36 KB)
📄 AMDGPULegalizerInfo.cpp(149.32 KB)
📄 AMDGPULegalizerInfo.h(8.49 KB)
📄 AMDGPULibCalls.cpp(53.89 KB)
📄 AMDGPULibFunc.cpp(37.85 KB)
📄 AMDGPULibFunc.h(10.99 KB)
📄 AMDGPULowerIntrinsics.cpp(4.55 KB)
📄 AMDGPULowerKernelArguments.cpp(8.89 KB)
📄 AMDGPULowerKernelAttributes.cpp(7.78 KB)
📄 AMDGPUMCInstLower.cpp(14.27 KB)
📄 AMDGPUMachineCFGStructurizer.cpp(101.97 KB)
📄 AMDGPUMachineFunction.cpp(2.24 KB)
📄 AMDGPUMachineFunction.h(2.13 KB)
📄 AMDGPUMachineModuleInfo.cpp(1.34 KB)
📄 AMDGPUMachineModuleInfo.h(5.46 KB)
📄 AMDGPUMacroFusion.cpp(2.28 KB)
📄 AMDGPUMacroFusion.h(679 B)
📄 AMDGPUOpenCLEnqueuedBlockLowering.cpp(5.31 KB)
📄 AMDGPUPTNote.h(1.29 KB)
📄 AMDGPUPerfHintAnalysis.cpp(12.17 KB)
📄 AMDGPUPerfHintAnalysis.h(1.67 KB)
📄 AMDGPUPostLegalizerCombiner.cpp(12.02 KB)
📄 AMDGPUPreLegalizerCombiner.cpp(5.45 KB)
📄 AMDGPUPrintfRuntimeBinding.cpp(21.7 KB)
📄 AMDGPUPromoteAlloca.cpp(35.24 KB)
📄 AMDGPUPropagateAttributes.cpp(11.76 KB)
📄 AMDGPURegBankCombiner.cpp(5.36 KB)
📄 AMDGPURegisterBankInfo.cpp(161.67 KB)
📄 AMDGPURegisterBankInfo.h(7.41 KB)
📄 AMDGPURegisterBanks.td(921 B)
📄 AMDGPURewriteOutArguments.cpp(15.82 KB)
📄 AMDGPUSearchableTables.td(21.04 KB)
📄 AMDGPUSubtarget.cpp(29.62 KB)
📄 AMDGPUSubtarget.h(35.82 KB)
📄 AMDGPUTargetMachine.cpp(42.67 KB)
📄 AMDGPUTargetMachine.h(4.52 KB)
📄 AMDGPUTargetObjectFile.cpp(1.54 KB)
📄 AMDGPUTargetObjectFile.h(1.14 KB)
📄 AMDGPUTargetTransformInfo.cpp(39.07 KB)
📄 AMDGPUTargetTransformInfo.h(11.11 KB)
📄 AMDGPUUnifyDivergentExitNodes.cpp(13.84 KB)
📄 AMDGPUUnifyMetadata.cpp(4.46 KB)
📄 AMDILCFGStructurizer.cpp(56.32 KB)
📄 AMDKernelCodeT.h(32.84 KB)
📁 AsmParser
📄 BUFInstructions.td(110.75 KB)
📄 CaymanInstructions.td(7.93 KB)
📄 DSInstructions.td(52.37 KB)
📁 Disassembler
📄 EvergreenInstructions.td(28.24 KB)
📄 FLATInstructions.td(66.93 KB)
📄 GCNDPPCombine.cpp(19.92 KB)
📄 GCNHazardRecognizer.cpp(45.3 KB)
📄 GCNHazardRecognizer.h(3.96 KB)
📄 GCNILPSched.cpp(11.3 KB)
📄 GCNIterativeScheduler.cpp(20.62 KB)
📄 GCNIterativeScheduler.h(4.16 KB)
📄 GCNMinRegStrategy.cpp(8.47 KB)
📄 GCNNSAReassign.cpp(10.92 KB)
📄 GCNProcessors.td(4.84 KB)
📄 GCNRegBankReassign.cpp(26.68 KB)
📄 GCNRegPressure.cpp(16.27 KB)
📄 GCNRegPressure.h(9.15 KB)
📄 GCNSchedStrategy.cpp(21.67 KB)
📄 GCNSchedStrategy.h(3.77 KB)
📁 MCTargetDesc
📄 MIMGInstructions.td(39.85 KB)
📄 R600.td(1.51 KB)
📄 R600AsmPrinter.cpp(4.46 KB)
📄 R600AsmPrinter.h(1.5 KB)
📄 R600ClauseMergePass.cpp(7.38 KB)
📄 R600ControlFlowFinalizer.cpp(23.4 KB)
📄 R600Defines.h(4.25 KB)
📄 R600EmitClauseMarkers.cpp(12.1 KB)
📄 R600ExpandSpecialInstrs.cpp(10.11 KB)
📄 R600FrameLowering.cpp(1.83 KB)
📄 R600FrameLowering.h(1.25 KB)
📄 R600ISelLowering.cpp(81.88 KB)
📄 R600ISelLowering.h(4.8 KB)
📄 R600InstrFormats.td(11.58 KB)
📄 R600InstrInfo.cpp(49.47 KB)
📄 R600InstrInfo.h(13.7 KB)
📄 R600Instructions.td(55.13 KB)
📄 R600MachineFunctionInfo.cpp(551 B)
📄 R600MachineFunctionInfo.h(824 B)
📄 R600MachineScheduler.cpp(13.57 KB)
📄 R600MachineScheduler.h(2.53 KB)
📄 R600OpenCLImageTypeLoweringPass.cpp(11.75 KB)
📄 R600OptimizeVectorRegisters.cpp(13.4 KB)
📄 R600Packetizer.cpp(13.4 KB)
📄 R600Processors.td(4.42 KB)
📄 R600RegisterInfo.cpp(3.95 KB)
📄 R600RegisterInfo.h(2 KB)
📄 R600RegisterInfo.td(9.75 KB)
📄 R600Schedule.td(1.62 KB)
📄 R700Instructions.td(783 B)
📄 SIAddIMGInit.cpp(6.24 KB)
📄 SIAnnotateControlFlow.cpp(11.18 KB)
📄 SIDefines.h(20.86 KB)
📄 SIFixSGPRCopies.cpp(29.46 KB)
📄 SIFixVGPRCopies.cpp(2 KB)
📄 SIFixupVectorISel.cpp(8.75 KB)
📄 SIFoldOperands.cpp(54.56 KB)
📄 SIFormMemoryClauses.cpp(12.76 KB)
📄 SIFrameLowering.cpp(48.08 KB)
📄 SIFrameLowering.h(2.98 KB)
📄 SIISelLowering.cpp(423.43 KB)
📄 SIISelLowering.h(22.13 KB)
📄 SIInsertHardClauses.cpp(7.01 KB)
📄 SIInsertSkips.cpp(15.29 KB)
📄 SIInsertWaitcnts.cpp(58.33 KB)
📄 SIInstrFormats.td(9.44 KB)
📄 SIInstrInfo.cpp(247.15 KB)
📄 SIInstrInfo.h(41.24 KB)
📄 SIInstrInfo.td(90.7 KB)
📄 SIInstructions.td(77.7 KB)
📄 SILoadStoreOptimizer.cpp(76.21 KB)
📄 SILowerControlFlow.cpp(22.66 KB)
📄 SILowerI1Copies.cpp(27.83 KB)
📄 SILowerSGPRSpills.cpp(12.68 KB)
📄 SIMachineFunctionInfo.cpp(20.01 KB)
📄 SIMachineFunctionInfo.h(26.91 KB)
📄 SIMachineScheduler.cpp(69.44 KB)
📄 SIMachineScheduler.h(15.65 KB)
📄 SIMemoryLegalizer.cpp(45.84 KB)
📄 SIModeRegister.cpp(17.43 KB)
📄 SIOptimizeExecMasking.cpp(12.81 KB)
📄 SIOptimizeExecMaskingPreRA.cpp(11.13 KB)
📄 SIPeepholeSDWA.cpp(42.84 KB)
📄 SIPostRABundler.cpp(3.6 KB)
📄 SIPreAllocateWWMRegs.cpp(6.09 KB)
📄 SIPreEmitPeephole.cpp(10.51 KB)
📄 SIProgramInfo.h(2.04 KB)
📄 SIRegisterInfo.cpp(71.51 KB)
📄 SIRegisterInfo.h(13.04 KB)
📄 SIRegisterInfo.td(37.28 KB)
📄 SIRemoveShortExecBranches.cpp(4.96 KB)
📄 SISchedule.td(7.58 KB)
📄 SIShrinkInstructions.cpp(26.86 KB)
📄 SIWholeQuadMode.cpp(30.22 KB)
📄 SMInstructions.td(48.14 KB)
📄 SOPInstructions.td(60.51 KB)
📁 TargetInfo
📁 Utils
📄 VIInstrFormats.td(645 B)
📄 VOP1Instructions.td(35.53 KB)
📄 VOP2Instructions.td(65.04 KB)
📄 VOP3Instructions.td(53.14 KB)
📄 VOP3PInstructions.td(26.47 KB)
📄 VOPCInstructions.td(63.31 KB)
📄 VOPInstructions.td(23.76 KB)

Editing: SIPreAllocateWWMRegs.cpp

//===- SIPreAllocateWWMRegs.cpp - WWM Register Pre-allocation -------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
/// \file
/// Pass to pre-allocated WWM registers
//
//===----------------------------------------------------------------------===//

#include "AMDGPU.h"
#include "AMDGPUSubtarget.h"
#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
#include "SIInstrInfo.h"
#include "SIMachineFunctionInfo.h"
#include "SIRegisterInfo.h"
#include "llvm/ADT/PostOrderIterator.h"
#include "llvm/CodeGen/LiveInterval.h"
#include "llvm/CodeGen/LiveIntervals.h"
#include "llvm/CodeGen/LiveRegMatrix.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/RegisterClassInfo.h"
#include "llvm/CodeGen/VirtRegMap.h"
#include "llvm/InitializePasses.h"

using namespace llvm;

#define DEBUG_TYPE "si-pre-allocate-wwm-regs"

namespace {

class SIPreAllocateWWMRegs : public MachineFunctionPass {
private:
  const SIInstrInfo *TII;
  const SIRegisterInfo *TRI;
  MachineRegisterInfo *MRI;
  LiveIntervals *LIS;
  LiveRegMatrix *Matrix;
  VirtRegMap *VRM;
  RegisterClassInfo RegClassInfo;

std::vector<unsigned> RegsToRewrite;

public:
  static char ID;

SIPreAllocateWWMRegs() : MachineFunctionPass(ID) {
    initializeSIPreAllocateWWMRegsPass(*PassRegistry::getPassRegistry());
  }

bool runOnMachineFunction(MachineFunction &MF) override;

void getAnalysisUsage(AnalysisUsage &AU) const override {
    AU.addRequired<LiveIntervals>();
    AU.addPreserved<LiveIntervals>();
    AU.addRequired<VirtRegMap>();
    AU.addRequired<LiveRegMatrix>();
    AU.addPreserved<SlotIndexes>();
    AU.setPreservesCFG();
    MachineFunctionPass::getAnalysisUsage(AU);
  }

private:
  bool processDef(MachineOperand &MO);
  void rewriteRegs(MachineFunction &MF);
};

} // End anonymous namespace.

INITIALIZE_PASS_BEGIN(SIPreAllocateWWMRegs, DEBUG_TYPE,
                "SI Pre-allocate WWM Registers", false, false)
INITIALIZE_PASS_DEPENDENCY(LiveIntervals)
INITIALIZE_PASS_DEPENDENCY(VirtRegMap)
INITIALIZE_PASS_DEPENDENCY(LiveRegMatrix)
INITIALIZE_PASS_END(SIPreAllocateWWMRegs, DEBUG_TYPE,
                "SI Pre-allocate WWM Registers", false, false)

char SIPreAllocateWWMRegs::ID = 0;

char &llvm::SIPreAllocateWWMRegsID = SIPreAllocateWWMRegs::ID;

FunctionPass *llvm::createSIPreAllocateWWMRegsPass() {
  return new SIPreAllocateWWMRegs();
}

bool SIPreAllocateWWMRegs::processDef(MachineOperand &MO) {
  if (!MO.isReg())
    return false;

if (!TRI->isVGPR(*MRI, Reg))
    return false;

if (Register::isPhysicalRegister(Reg))
    return false;

if (VRM->hasPhys(Reg))
    return false;

LiveInterval &LI = LIS->getInterval(Reg);

for (unsigned PhysReg : RegClassInfo.getOrder(MRI->getRegClass(Reg))) {
    if (!MRI->isPhysRegUsed(PhysReg) &&
        Matrix->checkInterference(LI, PhysReg) == LiveRegMatrix::IK_Free) {
      Matrix->assign(LI, PhysReg);
      assert(PhysReg != 0);
      RegsToRewrite.push_back(Reg);
      return true;
    }
  }

llvm_unreachable("physreg not found for WWM expression");
  return false;
}

void SIPreAllocateWWMRegs::rewriteRegs(MachineFunction &MF) {
  for (MachineBasicBlock &MBB : MF) {
    for (MachineInstr &MI : MBB) {
      for (MachineOperand &MO : MI.operands()) {
        if (!MO.isReg())
          continue;

const Register VirtReg = MO.getReg();
        if (Register::isPhysicalRegister(VirtReg))
          continue;

if (!VRM->hasPhys(VirtReg))
          continue;

Register PhysReg = VRM->getPhys(VirtReg);
        const unsigned SubReg = MO.getSubReg();
        if (SubReg != 0) {
          PhysReg = TRI->getSubReg(PhysReg, SubReg);
          MO.setSubReg(0);
        }

MO.setReg(PhysReg);
        MO.setIsRenamable(false);
      }
    }
  }

SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();

for (unsigned Reg : RegsToRewrite) {
    LIS->removeInterval(Reg);

const Register PhysReg = VRM->getPhys(Reg);
    assert(PhysReg != 0);
    MFI->ReserveWWMRegister(PhysReg);
  }

RegsToRewrite.clear();

// Update the set of reserved registers to include WWM ones.
  MRI->freezeReservedRegs(MF);
}

bool SIPreAllocateWWMRegs::runOnMachineFunction(MachineFunction &MF) {
  LLVM_DEBUG(dbgs() << "SIPreAllocateWWMRegs: function " << MF.getName() << "\n");

const GCNSubtarget &ST = MF.getSubtarget<GCNSubtarget>();

TII = ST.getInstrInfo();
  TRI = &TII->getRegisterInfo();
  MRI = &MF.getRegInfo();

LIS = &getAnalysis<LiveIntervals>();
  Matrix = &getAnalysis<LiveRegMatrix>();
  VRM = &getAnalysis<VirtRegMap>();

RegClassInfo.runOnMachineFunction(MF);

bool RegsAssigned = false;

// We use a reverse post-order traversal of the control-flow graph to
  // guarantee that we visit definitions in dominance order. Since WWM
  // expressions are guaranteed to never involve phi nodes, and we can only
  // escape WWM through the special WWM instruction, this means that this is a
  // perfect elimination order, so we can never do any better.
  ReversePostOrderTraversal<MachineFunction*> RPOT(&MF);

for (MachineBasicBlock *MBB : RPOT) {
    bool InWWM = false;
    for (MachineInstr &MI : *MBB) {
      if (MI.getOpcode() == AMDGPU::V_SET_INACTIVE_B32 ||
          MI.getOpcode() == AMDGPU::V_SET_INACTIVE_B64)
        RegsAssigned |= processDef(MI.getOperand(0));

if (MI.getOpcode() == AMDGPU::ENTER_WWM) {
        LLVM_DEBUG(dbgs() << "entering WWM region: " << MI << "\n");
        InWWM = true;
        continue;
      }

if (MI.getOpcode() == AMDGPU::EXIT_WWM) {
        LLVM_DEBUG(dbgs() << "exiting WWM region: " << MI << "\n");
        InWWM = false;
      }

if (!InWWM)
        continue;

LLVM_DEBUG(dbgs() << "processing " << MI << "\n");

for (MachineOperand &DefOpnd : MI.defs()) {
        RegsAssigned |= processDef(DefOpnd);
      }
    }
  }

if (!RegsAssigned)
    return false;

rewriteRegs(MF);
  return true;
}

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Editing: SIPreAllocateWWMRegs.cpp

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