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📄 AggressiveAntiDepBreaker.cpp(37.23 KB)
📄 AggressiveAntiDepBreaker.h(6.8 KB)
📄 AllocationOrder.cpp(1.96 KB)
📄 AllocationOrder.h(2.96 KB)
📄 Analysis.cpp(32.62 KB)
📁 AsmPrinter
📄 AtomicExpandPass.cpp(71.86 KB)
📄 BBSectionsPrepare.cpp(18.8 KB)
📄 BasicTargetTransformInfo.cpp(1.53 KB)
📄 BranchFolding.cpp(77.92 KB)
📄 BranchFolding.h(7.36 KB)
📄 BranchRelaxation.cpp(19.45 KB)
📄 BreakFalseDeps.cpp(9.79 KB)
📄 BuiltinGCs.cpp(4.88 KB)
📄 CFGuardLongjmp.cpp(3.73 KB)
📄 CFIInstrInserter.cpp(17.53 KB)
📄 CalcSpillWeights.cpp(10.22 KB)
📄 CallingConvLower.cpp(10.4 KB)
📄 CodeGen.cpp(5.28 KB)
📄 CodeGenPrepare.cpp(295.01 KB)
📄 CommandFlags.cpp(24.89 KB)
📄 CriticalAntiDepBreaker.cpp(27.91 KB)
📄 CriticalAntiDepBreaker.h(4.22 KB)
📄 DFAPacketizer.cpp(10.91 KB)
📄 DeadMachineInstructionElim.cpp(6.52 KB)
📄 DetectDeadLanes.cpp(20.74 KB)
📄 DwarfEHPrepare.cpp(9.01 KB)
📄 EarlyIfConversion.cpp(37.51 KB)
📄 EdgeBundles.cpp(3.21 KB)
📄 ExecutionDomainFix.cpp(14.67 KB)
📄 ExpandMemCmp.cpp(33.66 KB)
📄 ExpandPostRAPseudos.cpp(7.28 KB)
📄 ExpandReductions.cpp(7.23 KB)
📄 FEntryInserter.cpp(1.81 KB)
📄 FaultMaps.cpp(4.99 KB)
📄 FinalizeISel.cpp(2.65 KB)
📄 FixupStatepointCallerSaved.cpp(11.06 KB)
📄 FuncletLayout.cpp(2.21 KB)
📄 GCMetadata.cpp(5.1 KB)
📄 GCMetadataPrinter.cpp(748 B)
📄 GCRootLowering.cpp(11.46 KB)
📄 GCStrategy.cpp(708 B)
📁 GlobalISel
📄 GlobalMerge.cpp(24.52 KB)
📄 HardwareLoops.cpp(18.44 KB)
📄 IfConversion.cpp(89.43 KB)
📄 ImplicitNullChecks.cpp(25.14 KB)
📄 IndirectBrExpandPass.cpp(7.79 KB)
📄 InlineSpiller.cpp(58.24 KB)
📄 InterferenceCache.cpp(8.83 KB)
📄 InterferenceCache.h(7.22 KB)
📄 InterleavedAccessPass.cpp(16.59 KB)
📄 InterleavedLoadCombinePass.cpp(42.35 KB)
📄 IntrinsicLowering.cpp(17.08 KB)
📄 LLVMTargetMachine.cpp(10.25 KB)
📄 LatencyPriorityQueue.cpp(5.64 KB)
📄 LazyMachineBlockFrequencyInfo.cpp(3.36 KB)
📄 LexicalScopes.cpp(12.16 KB)
📄 LiveDebugValues.cpp(78.98 KB)
📄 LiveDebugVariables.cpp(51.79 KB)
📄 LiveDebugVariables.h(2.15 KB)
📄 LiveInterval.cpp(46.67 KB)
📄 LiveIntervalCalc.cpp(7.62 KB)
📄 LiveIntervalUnion.cpp(6.36 KB)
📄 LiveIntervals.cpp(64.59 KB)
📄 LivePhysRegs.cpp(11.08 KB)
📄 LiveRangeCalc.cpp(15.72 KB)
📄 LiveRangeEdit.cpp(17.03 KB)
📄 LiveRangeShrink.cpp(8.69 KB)
📄 LiveRangeUtils.h(2.12 KB)
📄 LiveRegMatrix.cpp(7.47 KB)
📄 LiveRegUnits.cpp(4.72 KB)
📄 LiveStacks.cpp(2.95 KB)
📄 LiveVariables.cpp(30.26 KB)
📄 LocalStackSlotAllocation.cpp(17.26 KB)
📄 LoopTraversal.cpp(2.89 KB)
📄 LowLevelType.cpp(1.93 KB)
📄 LowerEmuTLS.cpp(5.66 KB)
📄 MBFIWrapper.cpp(1.57 KB)
📄 MIRCanonicalizerPass.cpp(12.46 KB)
📄 MIRNamerPass.cpp(2.16 KB)
📁 MIRParser
📄 MIRPrinter.cpp(32.67 KB)
📄 MIRPrintingPass.cpp(1.99 KB)
📄 MIRVRegNamerUtils.cpp(6.04 KB)
📄 MIRVRegNamerUtils.h(3.25 KB)
📄 MachineBasicBlock.cpp(50.47 KB)
📄 MachineBlockFrequencyInfo.cpp(10.13 KB)
📄 MachineBlockPlacement.cpp(137.61 KB)
📄 MachineBranchProbabilityInfo.cpp(3.5 KB)
📄 MachineCSE.cpp(31.82 KB)
📄 MachineCombiner.cpp(28.13 KB)
📄 MachineCopyPropagation.cpp(29.21 KB)
📄 MachineDebugify.cpp(6.47 KB)
📄 MachineDominanceFrontier.cpp(1.83 KB)
📄 MachineDominators.cpp(4.86 KB)
📄 MachineFrameInfo.cpp(9.77 KB)
📄 MachineFunction.cpp(42.97 KB)
📄 MachineFunctionPass.cpp(4.78 KB)
📄 MachineFunctionPrinterPass.cpp(2.3 KB)
📄 MachineInstr.cpp(76.39 KB)
📄 MachineInstrBundle.cpp(11.49 KB)
📄 MachineLICM.cpp(57.05 KB)
📄 MachineLoopInfo.cpp(4.98 KB)
📄 MachineLoopUtils.cpp(5.16 KB)
📄 MachineModuleInfo.cpp(9.9 KB)
📄 MachineModuleInfoImpls.cpp(1.5 KB)
📄 MachineOperand.cpp(39.6 KB)
📄 MachineOptimizationRemarkEmitter.cpp(3.29 KB)
📄 MachineOutliner.cpp(42.13 KB)
📄 MachinePipeliner.cpp(111.33 KB)
📄 MachinePostDominators.cpp(2.42 KB)
📄 MachineRegionInfo.cpp(4.75 KB)
📄 MachineRegisterInfo.cpp(22.97 KB)
📄 MachineSSAUpdater.cpp(12.99 KB)
📄 MachineScheduler.cpp(136.89 KB)
📄 MachineSink.cpp(51.94 KB)
📄 MachineSizeOpts.cpp(8.76 KB)
📄 MachineStripDebug.cpp(3.76 KB)
📄 MachineTraceMetrics.cpp(49.58 KB)
📄 MachineVerifier.cpp(107.98 KB)
📄 MacroFusion.cpp(7.55 KB)
📄 ModuloSchedule.cpp(85.09 KB)
📄 NonRelocatableStringpool.cpp(1.65 KB)
📄 OptimizePHIs.cpp(6.7 KB)
📄 PHIElimination.cpp(27.73 KB)
📄 PHIEliminationUtils.cpp(2.56 KB)
📄 PHIEliminationUtils.h(972 B)
📄 ParallelCG.cpp(3.71 KB)
📄 PatchableFunction.cpp(3.44 KB)
📄 PeepholeOptimizer.cpp(78.41 KB)
📄 PostRAHazardRecognizer.cpp(3.5 KB)
📄 PostRASchedulerList.cpp(24.31 KB)
📄 PreISelIntrinsicLowering.cpp(7.91 KB)
📄 ProcessImplicitDefs.cpp(5.4 KB)
📄 PrologEpilogInserter.cpp(50.45 KB)
📄 PseudoSourceValue.cpp(4.71 KB)
📄 RDFGraph.cpp(58.39 KB)
📄 RDFLiveness.cpp(40.7 KB)
📄 RDFRegisters.cpp(11.29 KB)
📄 ReachingDefAnalysis.cpp(21.74 KB)
📄 RegAllocBase.cpp(6.31 KB)
📄 RegAllocBase.h(4.63 KB)
📄 RegAllocBasic.cpp(11.33 KB)
📄 RegAllocFast.cpp(45.78 KB)
📄 RegAllocGreedy.cpp(123.32 KB)
📄 RegAllocPBQP.cpp(33.14 KB)
📄 RegUsageInfoCollector.cpp(7.39 KB)
📄 RegUsageInfoPropagate.cpp(5.07 KB)
📄 RegisterClassInfo.cpp(6.62 KB)
📄 RegisterCoalescer.cpp(151.71 KB)
📄 RegisterCoalescer.h(4.04 KB)
📄 RegisterPressure.cpp(48.86 KB)
📄 RegisterScavenging.cpp(27.48 KB)
📄 RegisterUsageInfo.cpp(3.18 KB)
📄 RenameIndependentSubregs.cpp(14.79 KB)
📄 ResetMachineFunctionPass.cpp(3.48 KB)
📄 SafeStack.cpp(34.12 KB)
📄 SafeStackLayout.cpp(5.3 KB)
📄 SafeStackLayout.h(2.41 KB)
📄 ScalarizeMaskedMemIntrin.cpp(31.46 KB)
📄 ScheduleDAG.cpp(21.34 KB)
📄 ScheduleDAGInstrs.cpp(54.59 KB)
📄 ScheduleDAGPrinter.cpp(3.21 KB)
📄 ScoreboardHazardRecognizer.cpp(7.96 KB)
📁 SelectionDAG
📄 ShadowStackGCLowering.cpp(14.16 KB)
📄 ShrinkWrap.cpp(23.03 KB)
📄 SjLjEHPrepare.cpp(18.93 KB)
📄 SlotIndexes.cpp(9.35 KB)
📄 SpillPlacement.cpp(12.58 KB)
📄 SpillPlacement.h(6.67 KB)
📄 SplitKit.cpp(66.39 KB)
📄 SplitKit.h(23.7 KB)
📄 StackColoring.cpp(49.03 KB)
📄 StackMapLivenessAnalysis.cpp(6.16 KB)
📄 StackMaps.cpp(19.74 KB)
📄 StackProtector.cpp(22.94 KB)
📄 StackSlotColoring.cpp(17.12 KB)
📄 SwiftErrorValueTracking.cpp(11.37 KB)
📄 SwitchLoweringUtils.cpp(18.33 KB)
📄 TailDuplication.cpp(3.32 KB)
📄 TailDuplicator.cpp(38.29 KB)
📄 TargetFrameLoweringImpl.cpp(6.24 KB)
📄 TargetInstrInfo.cpp(51.1 KB)
📄 TargetLoweringBase.cpp(82.53 KB)
📄 TargetLoweringObjectFileImpl.cpp(80.52 KB)
📄 TargetOptionsImpl.cpp(2 KB)
📄 TargetPassConfig.cpp(48.89 KB)
📄 TargetRegisterInfo.cpp(19.15 KB)
📄 TargetSchedule.cpp(13.16 KB)
📄 TargetSubtargetInfo.cpp(1.89 KB)
📄 TwoAddressInstructionPass.cpp(62.08 KB)
📄 TypePromotion.cpp(32.46 KB)
📄 UnreachableBlockElim.cpp(7.48 KB)
📄 ValueTypes.cpp(19.87 KB)
📄 VirtRegMap.cpp(21.4 KB)
📄 WasmEHPrepare.cpp(17.48 KB)
📄 WinEHPrepare.cpp(51.16 KB)
📄 XRayInstrumentation.cpp(9.66 KB)

Editing: SlotIndexes.cpp

//===-- SlotIndexes.cpp - Slot Indexes Pass  ------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

#include "llvm/CodeGen/SlotIndexes.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/InitializePasses.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"

using namespace llvm;

#define DEBUG_TYPE "slotindexes"

char SlotIndexes::ID = 0;

SlotIndexes::SlotIndexes() : MachineFunctionPass(ID), mf(nullptr) {
  initializeSlotIndexesPass(*PassRegistry::getPassRegistry());
}

SlotIndexes::~SlotIndexes() {
  // The indexList's nodes are all allocated in the BumpPtrAllocator.
  indexList.clearAndLeakNodesUnsafely();
}

INITIALIZE_PASS(SlotIndexes, DEBUG_TYPE,
                "Slot index numbering", false, false)

STATISTIC(NumLocalRenum,  "Number of local renumberings");

void SlotIndexes::getAnalysisUsage(AnalysisUsage &au) const {
  au.setPreservesAll();
  MachineFunctionPass::getAnalysisUsage(au);
}

void SlotIndexes::releaseMemory() {
  mi2iMap.clear();
  MBBRanges.clear();
  idx2MBBMap.clear();
  indexList.clear();
  ileAllocator.Reset();
}

bool SlotIndexes::runOnMachineFunction(MachineFunction &fn) {

// Compute numbering as follows:
  // Grab an iterator to the start of the index list.
  // Iterate over all MBBs, and within each MBB all MIs, keeping the MI
  // iterator in lock-step (though skipping it over indexes which have
  // null pointers in the instruction field).
  // At each iteration assert that the instruction pointed to in the index
  // is the same one pointed to by the MI iterator. This

// FIXME: This can be simplified. The mi2iMap_, Idx2MBBMap, etc. should
  // only need to be set up once after the first numbering is computed.

mf = &fn;

// Check that the list contains only the sentinal.
  assert(indexList.empty() && "Index list non-empty at initial numbering?");
  assert(idx2MBBMap.empty() &&
         "Index -> MBB mapping non-empty at initial numbering?");
  assert(MBBRanges.empty() &&
         "MBB -> Index mapping non-empty at initial numbering?");
  assert(mi2iMap.empty() &&
         "MachineInstr -> Index mapping non-empty at initial numbering?");

unsigned index = 0;
  MBBRanges.resize(mf->getNumBlockIDs());
  idx2MBBMap.reserve(mf->size());

indexList.push_back(createEntry(nullptr, index));

// Iterate over the function.
  for (MachineBasicBlock &MBB : *mf) {
    // Insert an index for the MBB start.
    SlotIndex blockStartIndex(&indexList.back(), SlotIndex::Slot_Block);

for (MachineInstr &MI : MBB) {
      if (MI.isDebugInstr())
        continue;

// Insert a store index for the instr.
      indexList.push_back(createEntry(&MI, index += SlotIndex::InstrDist));

// Save this base index in the maps.
      mi2iMap.insert(std::make_pair(
          &MI, SlotIndex(&indexList.back(), SlotIndex::Slot_Block)));
    }

// We insert one blank instructions between basic blocks.
    indexList.push_back(createEntry(nullptr, index += SlotIndex::InstrDist));

MBBRanges[MBB.getNumber()].first = blockStartIndex;
    MBBRanges[MBB.getNumber()].second = SlotIndex(&indexList.back(),
                                                   SlotIndex::Slot_Block);
    idx2MBBMap.push_back(IdxMBBPair(blockStartIndex, &MBB));
  }

// Sort the Idx2MBBMap
  llvm::sort(idx2MBBMap, less_first());

LLVM_DEBUG(mf->print(dbgs(), this));

// And we're done!
  return false;
}

void SlotIndexes::removeMachineInstrFromMaps(MachineInstr &MI,
                                             bool AllowBundled) {
  assert((AllowBundled || !MI.isBundledWithPred()) &&
         "Use removeSingleMachineInstrFromMaps() instead");
  Mi2IndexMap::iterator mi2iItr = mi2iMap.find(&MI);
  if (mi2iItr == mi2iMap.end())
    return;

SlotIndex MIIndex = mi2iItr->second;
  IndexListEntry &MIEntry = *MIIndex.listEntry();
  assert(MIEntry.getInstr() == &MI && "Instruction indexes broken.");
  mi2iMap.erase(mi2iItr);
  // FIXME: Eventually we want to actually delete these indexes.
  MIEntry.setInstr(nullptr);
}

void SlotIndexes::removeSingleMachineInstrFromMaps(MachineInstr &MI) {
  Mi2IndexMap::iterator mi2iItr = mi2iMap.find(&MI);
  if (mi2iItr == mi2iMap.end())
    return;

SlotIndex MIIndex = mi2iItr->second;
  IndexListEntry &MIEntry = *MIIndex.listEntry();
  assert(MIEntry.getInstr() == &MI && "Instruction indexes broken.");
  mi2iMap.erase(mi2iItr);

// When removing the first instruction of a bundle update mapping to next
  // instruction.
  if (MI.isBundledWithSucc()) {
    // Only the first instruction of a bundle should have an index assigned.
    assert(!MI.isBundledWithPred() && "Should be first bundle instruction");

MachineBasicBlock::instr_iterator Next = std::next(MI.getIterator());
    MachineInstr &NextMI = *Next;
    MIEntry.setInstr(&NextMI);
    mi2iMap.insert(std::make_pair(&NextMI, MIIndex));
    return;
  } else {
    // FIXME: Eventually we want to actually delete these indexes.
    MIEntry.setInstr(nullptr);
  }
}

// Renumber indexes locally after curItr was inserted, but failed to get a new
// index.
void SlotIndexes::renumberIndexes(IndexList::iterator curItr) {
  // Number indexes with half the default spacing so we can catch up quickly.
  const unsigned Space = SlotIndex::InstrDist/2;
  static_assert((Space & 3) == 0, "InstrDist must be a multiple of 2*NUM");

IndexList::iterator startItr = std::prev(curItr);
  unsigned index = startItr->getIndex();
  do {
    curItr->setIndex(index += Space);
    ++curItr;
    // If the next index is bigger, we have caught up.
  } while (curItr != indexList.end() && curItr->getIndex() <= index);

LLVM_DEBUG(dbgs() << "\n*** Renumbered SlotIndexes " << startItr->getIndex()
                    << '-' << index << " ***\n");
  ++NumLocalRenum;
}

// Repair indexes after adding and removing instructions.
void SlotIndexes::repairIndexesInRange(MachineBasicBlock *MBB,
                                       MachineBasicBlock::iterator Begin,
                                       MachineBasicBlock::iterator End) {
  // FIXME: Is this really necessary? The only caller repairIntervalsForRange()
  // does the same thing.
  // Find anchor points, which are at the beginning/end of blocks or at
  // instructions that already have indexes.
  while (Begin != MBB->begin() && !hasIndex(*Begin))
    --Begin;
  while (End != MBB->end() && !hasIndex(*End))
    ++End;

bool includeStart = (Begin == MBB->begin());
  SlotIndex startIdx;
  if (includeStart)
    startIdx = getMBBStartIdx(MBB);
  else
    startIdx = getInstructionIndex(*Begin);

SlotIndex endIdx;
  if (End == MBB->end())
    endIdx = getMBBEndIdx(MBB);
  else
    endIdx = getInstructionIndex(*End);

// FIXME: Conceptually, this code is implementing an iterator on MBB that
  // optionally includes an additional position prior to MBB->begin(), indicated
  // by the includeStart flag. This is done so that we can iterate MIs in a MBB
  // in parallel with SlotIndexes, but there should be a better way to do this.
  IndexList::iterator ListB = startIdx.listEntry()->getIterator();
  IndexList::iterator ListI = endIdx.listEntry()->getIterator();
  MachineBasicBlock::iterator MBBI = End;
  bool pastStart = false;
  while (ListI != ListB || MBBI != Begin || (includeStart && !pastStart)) {
    assert(ListI->getIndex() >= startIdx.getIndex() &&
           (includeStart || !pastStart) &&
           "Decremented past the beginning of region to repair.");

MachineInstr *SlotMI = ListI->getInstr();
    MachineInstr *MI = (MBBI != MBB->end() && !pastStart) ? &*MBBI : nullptr;
    bool MBBIAtBegin = MBBI == Begin && (!includeStart || pastStart);

if (SlotMI == MI && !MBBIAtBegin) {
      --ListI;
      if (MBBI != Begin)
        --MBBI;
      else
        pastStart = true;
    } else if (MI && mi2iMap.find(MI) == mi2iMap.end()) {
      if (MBBI != Begin)
        --MBBI;
      else
        pastStart = true;
    } else {
      --ListI;
      if (SlotMI)
        removeMachineInstrFromMaps(*SlotMI);
    }
  }

// In theory this could be combined with the previous loop, but it is tricky
  // to update the IndexList while we are iterating it.
  for (MachineBasicBlock::iterator I = End; I != Begin;) {
    --I;
    MachineInstr &MI = *I;
    if (!MI.isDebugInstr() && mi2iMap.find(&MI) == mi2iMap.end())
      insertMachineInstrInMaps(MI);
  }
}

#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
LLVM_DUMP_METHOD void SlotIndexes::dump() const {
  for (IndexList::const_iterator itr = indexList.begin();
       itr != indexList.end(); ++itr) {
    dbgs() << itr->getIndex() << " ";

if (itr->getInstr()) {
      dbgs() << *itr->getInstr();
    } else {
      dbgs() << "\n";
    }
  }

for (unsigned i = 0, e = MBBRanges.size(); i != e; ++i)
    dbgs() << "%bb." << i << "\t[" << MBBRanges[i].first << ';'
           << MBBRanges[i].second << ")\n";
}
#endif

// Print a SlotIndex to a raw_ostream.
void SlotIndex::print(raw_ostream &os) const {
  if (isValid())
    os << listEntry()->getIndex() << "Berd"[getSlot()];
  else
    os << "invalid";
}

#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
// Dump a SlotIndex to stderr.
LLVM_DUMP_METHOD void SlotIndex::dump() const {
  print(dbgs());
  dbgs() << "\n";
}
#endif

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Editing: SlotIndexes.cpp

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