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📄 AtomicExpandUtils.h(2.49 KB)
📄 BasicTTIImpl.h(73.64 KB)
📄 BuiltinGCs.h(1008 B)
📄 CSEConfigBase.h(1.09 KB)
📄 CalcSpillWeights.h(4.69 KB)
📄 CallingConvLower.h(21 KB)
📄 CommandFlags.h(3.65 KB)
📄 CostTable.h(1.87 KB)
📄 DAGCombine.h(606 B)
📄 DFAPacketizer.h(7.47 KB)
📄 DIE.h(32.19 KB)
📄 DIEValue.def(1.4 KB)
📄 DbgEntityHistoryCalculator.h(4.37 KB)
📄 DebugHandlerBase.h(4.68 KB)
📄 DwarfStringPoolEntry.h(2.18 KB)
📄 EdgeBundles.h(2.13 KB)
📄 ExecutionDomainFix.h(7.72 KB)
📄 ExpandReductions.h(726 B)
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📄 FaultMaps.h(6.66 KB)
📄 FunctionLoweringInfo.h(9.68 KB)
📄 GCMetadata.h(7.24 KB)
📄 GCMetadataPrinter.h(2.46 KB)
📄 GCStrategy.h(5.25 KB)
📁 GlobalISel
📄 ISDOpcodes.h(52.75 KB)
📄 IndirectThunks.h(3.85 KB)
📄 IntrinsicLowering.h(1.67 KB)
📄 LatencyPriorityQueue.h(3.09 KB)
📄 LazyMachineBlockFrequencyInfo.h(2.82 KB)
📄 LexicalScopes.h(10.06 KB)
📄 LinkAllAsmWriterComponents.h(1.34 KB)
📄 LinkAllCodegenComponents.h(2.18 KB)
📄 LiveInterval.h(37.24 KB)
📄 LiveIntervalCalc.h(2.91 KB)
📄 LiveIntervalUnion.h(6.93 KB)
📄 LiveIntervals.h(19.86 KB)
📄 LivePhysRegs.h(7.51 KB)
📄 LiveRangeCalc.h(11.49 KB)
📄 LiveRangeEdit.h(10.45 KB)
📄 LiveRegMatrix.h(6.18 KB)
📄 LiveRegUnits.h(6.24 KB)
📄 LiveStacks.h(3.35 KB)
📄 LiveVariables.h(12.98 KB)
📄 LoopTraversal.h(4.38 KB)
📄 LowLevelType.h(1.28 KB)
📄 MBFIWrapper.h(1.58 KB)
📄 MIRFormatter.h(3.13 KB)
📁 MIRParser
📄 MIRPrinter.h(1.73 KB)
📄 MIRYamlMapping.h(23.95 KB)
📄 MachORelocation.h(2.19 KB)
📄 MachineBasicBlock.h(42.95 KB)
📄 MachineBlockFrequencyInfo.h(3.21 KB)
📄 MachineBranchProbabilityInfo.h(2.69 KB)
📄 MachineCombinerPattern.h(3.5 KB)
📄 MachineConstantPool.h(5.25 KB)
📄 MachineDominanceFrontier.h(2.93 KB)
📄 MachineDominators.h(9.59 KB)
📄 MachineFrameInfo.h(34.84 KB)
📄 MachineFunction.h(42.94 KB)
📄 MachineFunctionPass.h(2.93 KB)
📄 MachineInstr.h(73.72 KB)
📄 MachineInstrBuilder.h(22.84 KB)
📄 MachineInstrBundle.h(10.16 KB)
📄 MachineInstrBundleIterator.h(10.92 KB)
📄 MachineJumpTableInfo.h(4.66 KB)
📄 MachineLoopInfo.h(7.3 KB)
📄 MachineLoopUtils.h(1.74 KB)
📄 MachineMemOperand.h(12.69 KB)
📄 MachineModuleInfo.h(9.88 KB)
📄 MachineModuleInfoImpls.h(3.36 KB)
📄 MachineOperand.h(37.64 KB)
📄 MachineOptimizationRemarkEmitter.h(8.99 KB)
📄 MachineOutliner.h(8.04 KB)
📄 MachinePassRegistry.h(6.1 KB)
📄 MachinePipeliner.h(21.17 KB)
📄 MachinePostDominators.h(2.93 KB)
📄 MachineRegionInfo.h(5.93 KB)
📄 MachineRegisterInfo.h(46.75 KB)
📄 MachineSSAUpdater.h(4.37 KB)
📄 MachineScheduler.h(36.6 KB)
📄 MachineSizeOpts.h(1.86 KB)
📄 MachineTraceMetrics.h(17.17 KB)
📄 MacroFusion.h(1.96 KB)
📄 ModuloSchedule.h(15.8 KB)
📄 NonRelocatableStringpool.h(2.9 KB)
📁 PBQP
📄 PBQPRAConstraint.h(1.83 KB)
📄 ParallelCG.h(1.66 KB)
📄 Passes.h(18.96 KB)
📄 PreISelIntrinsicLowering.h(944 B)
📄 PseudoSourceValue.h(6.21 KB)
📄 RDFGraph.h(33.73 KB)
📄 RDFLiveness.h(5.01 KB)
📄 RDFRegisters.h(6.51 KB)
📄 ReachingDefAnalysis.h(10.68 KB)
📄 RegAllocPBQP.h(16.47 KB)
📄 RegAllocRegistry.h(2.27 KB)
📄 Register.h(5.61 KB)
📄 RegisterClassInfo.h(4.86 KB)
📄 RegisterPressure.h(21.04 KB)
📄 RegisterScavenging.h(8.73 KB)
📄 RegisterUsageInfo.h(2.3 KB)
📄 ResourcePriorityQueue.h(4.19 KB)
📄 RuntimeLibcalls.h(3.05 KB)
📄 SDNodeProperties.td(1.57 KB)
📄 ScheduleDAG.h(28.92 KB)
📄 ScheduleDAGInstrs.h(15.49 KB)
📄 ScheduleDAGMutation.h(1021 B)
📄 ScheduleDFS.h(5.79 KB)
📄 ScheduleHazardRecognizer.h(4.65 KB)
📄 SchedulerRegistry.h(4.27 KB)
📄 ScoreboardHazardRecognizer.h(3.7 KB)
📄 SelectionDAG.h(89.12 KB)
📄 SelectionDAGAddressAnalysis.h(3.58 KB)
📄 SelectionDAGISel.h(13.48 KB)
📄 SelectionDAGNodes.h(91.77 KB)
📄 SelectionDAGTargetInfo.h(7.99 KB)
📄 SlotIndexes.h(24.12 KB)
📄 Spiller.h(1.16 KB)
📄 StackMaps.h(11.45 KB)
📄 StackProtector.h(4.1 KB)
📄 SwiftErrorValueTracking.h(3.87 KB)
📄 SwitchLoweringUtils.h(9.51 KB)
📄 TailDuplicator.h(5.54 KB)
📄 TargetCallingConv.h(8.26 KB)
📄 TargetFrameLowering.h(19.21 KB)
📄 TargetInstrInfo.h(84.48 KB)
📄 TargetLowering.h(194.17 KB)
📄 TargetLoweringObjectFileImpl.h(11.63 KB)
📄 TargetOpcodes.h(1.37 KB)
📄 TargetPassConfig.h(17.9 KB)
📄 TargetRegisterInfo.h(48.65 KB)
📄 TargetSchedule.h(7.75 KB)
📄 TargetSubtargetInfo.h(12.53 KB)
📄 UnreachableBlockElim.h(1.39 KB)
📄 ValueTypes.h(17.2 KB)
📄 ValueTypes.td(11.42 KB)
📄 VirtRegMap.h(6.37 KB)
📄 WasmEHFuncInfo.h(1.92 KB)
📄 WinEHFuncInfo.h(4.01 KB)

Editing: MachineInstrBundle.h

//===- llvm/CodeGen/MachineInstrBundle.h - MI bundle utilities --*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file provide utility functions to manipulate machine instruction
// bundles.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_MACHINEINSTRBUNDLE_H
#define LLVM_CODEGEN_MACHINEINSTRBUNDLE_H

#include "llvm/CodeGen/MachineBasicBlock.h"

namespace llvm {

/// finalizeBundle - Finalize a machine instruction bundle which includes
/// a sequence of instructions starting from FirstMI to LastMI (exclusive).
/// This routine adds a BUNDLE instruction to represent the bundle, it adds
/// IsInternalRead markers to MachineOperands which are defined inside the
/// bundle, and it copies externally visible defs and uses to the BUNDLE
/// instruction.
void finalizeBundle(MachineBasicBlock &MBB,
                    MachineBasicBlock::instr_iterator FirstMI,
                    MachineBasicBlock::instr_iterator LastMI);

/// finalizeBundle - Same functionality as the previous finalizeBundle except
/// the last instruction in the bundle is not provided as an input. This is
/// used in cases where bundles are pre-determined by marking instructions
/// with 'InsideBundle' marker. It returns the MBB instruction iterator that
/// points to the end of the bundle.
MachineBasicBlock::instr_iterator finalizeBundle(MachineBasicBlock &MBB,
                    MachineBasicBlock::instr_iterator FirstMI);

/// finalizeBundles - Finalize instruction bundles in the specified
/// MachineFunction. Return true if any bundles are finalized.
bool finalizeBundles(MachineFunction &MF);

/// Returns an iterator to the first instruction in the bundle containing \p I.
inline MachineBasicBlock::instr_iterator getBundleStart(
    MachineBasicBlock::instr_iterator I) {
  while (I->isBundledWithPred())
    --I;
  return I;
}

/// Returns an iterator to the first instruction in the bundle containing \p I.
inline MachineBasicBlock::const_instr_iterator getBundleStart(
    MachineBasicBlock::const_instr_iterator I) {
  while (I->isBundledWithPred())
    --I;
  return I;
}

/// Returns an iterator pointing beyond the bundle containing \p I.
inline MachineBasicBlock::instr_iterator getBundleEnd(
    MachineBasicBlock::instr_iterator I) {
  while (I->isBundledWithSucc())
    ++I;
  ++I;
  return I;
}

/// Returns an iterator pointing beyond the bundle containing \p I.
inline MachineBasicBlock::const_instr_iterator getBundleEnd(
    MachineBasicBlock::const_instr_iterator I) {
  while (I->isBundledWithSucc())
    ++I;
  ++I;
  return I;
}

//===----------------------------------------------------------------------===//
// MachineBundleOperand iterator
//

/// MIBundleOperandIteratorBase - Iterator that visits all operands in a bundle
/// of MachineInstrs. This class is not intended to be used directly, use one
/// of the sub-classes instead.
///
/// Intended use:
///
///   for (MIBundleOperands MIO(MI); MIO.isValid(); ++MIO) {
///     if (!MIO->isReg())
///       continue;
///     ...
///   }
///
template <typename ValueT>
class MIBundleOperandIteratorBase
    : public iterator_facade_base<MIBundleOperandIteratorBase<ValueT>,
                                  std::forward_iterator_tag, ValueT> {
  MachineBasicBlock::instr_iterator InstrI, InstrE;
  MachineInstr::mop_iterator OpI, OpE;

// If the operands on InstrI are exhausted, advance InstrI to the next
  // bundled instruction with operands.
  void advance() {
    while (OpI == OpE) {
      // Don't advance off the basic block, or into a new bundle.
      if (++InstrI == InstrE || !InstrI->isInsideBundle()) {
        InstrI = InstrE;
        break;
      }
      OpI = InstrI->operands_begin();
      OpE = InstrI->operands_end();
    }
  }

protected:
  /// MIBundleOperandIteratorBase - Create an iterator that visits all operands
  /// on MI, or all operands on every instruction in the bundle containing MI.
  ///
  /// @param MI The instruction to examine.
  ///
  explicit MIBundleOperandIteratorBase(MachineInstr &MI) {
    InstrI = getBundleStart(MI.getIterator());
    InstrE = MI.getParent()->instr_end();
    OpI = InstrI->operands_begin();
    OpE = InstrI->operands_end();
    advance();
  }

/// Constructor for an iterator past the last iteration: both instruction
  /// iterators point to the end of the BB and OpI == OpE.
  explicit MIBundleOperandIteratorBase(MachineBasicBlock::instr_iterator InstrE,
                                       MachineInstr::mop_iterator OpE)
      : InstrI(InstrE), InstrE(InstrE), OpI(OpE), OpE(OpE) {}

public:
  /// isValid - Returns true until all the operands have been visited.
  bool isValid() const { return OpI != OpE; }

/// Preincrement.  Move to the next operand.
  void operator++() {
    assert(isValid() && "Cannot advance MIOperands beyond the last operand");
    ++OpI;
    advance();
  }

ValueT &operator*() const { return *OpI; }
  ValueT *operator->() const { return &*OpI; }

bool operator==(const MIBundleOperandIteratorBase &Arg) const {
    // Iterators are equal, if InstrI matches and either OpIs match or OpI ==
    // OpE match for both. The second condition allows us to construct an 'end'
    // iterator, without finding the last instruction in a bundle up-front.
    return InstrI == Arg.InstrI &&
           (OpI == Arg.OpI || (OpI == OpE && Arg.OpI == Arg.OpE));
  }
  /// getOperandNo - Returns the number of the current operand relative to its
  /// instruction.
  ///
  unsigned getOperandNo() const {
    return OpI - InstrI->operands_begin();
  }
};

/// MIBundleOperands - Iterate over all operands in a bundle of machine
/// instructions.
///
class MIBundleOperands : public MIBundleOperandIteratorBase<MachineOperand> {
  /// Constructor for an iterator past the last iteration.
  MIBundleOperands(MachineBasicBlock::instr_iterator InstrE,
                   MachineInstr::mop_iterator OpE)
      : MIBundleOperandIteratorBase(InstrE, OpE) {}

public:
  MIBundleOperands(MachineInstr &MI) : MIBundleOperandIteratorBase(MI) {}

/// Returns an iterator past the last iteration.
  static MIBundleOperands end(const MachineBasicBlock &MBB) {
    return {const_cast<MachineBasicBlock &>(MBB).instr_end(),
            const_cast<MachineBasicBlock &>(MBB).instr_begin()->operands_end()};
  }
};

/// ConstMIBundleOperands - Iterate over all operands in a const bundle of
/// machine instructions.
///
class ConstMIBundleOperands
    : public MIBundleOperandIteratorBase<const MachineOperand> {

/// Constructor for an iterator past the last iteration.
  ConstMIBundleOperands(MachineBasicBlock::instr_iterator InstrE,
                        MachineInstr::mop_iterator OpE)
      : MIBundleOperandIteratorBase(InstrE, OpE) {}

public:
  ConstMIBundleOperands(const MachineInstr &MI)
      : MIBundleOperandIteratorBase(const_cast<MachineInstr &>(MI)) {}

/// Returns an iterator past the last iteration.
  static ConstMIBundleOperands end(const MachineBasicBlock &MBB) {
    return {const_cast<MachineBasicBlock &>(MBB).instr_end(),
            const_cast<MachineBasicBlock &>(MBB).instr_begin()->operands_end()};
  }
};

inline iterator_range<ConstMIBundleOperands>
const_mi_bundle_ops(const MachineInstr &MI) {
  return make_range(ConstMIBundleOperands(MI),
                    ConstMIBundleOperands::end(*MI.getParent()));
}

inline iterator_range<MIBundleOperands> mi_bundle_ops(MachineInstr &MI) {
  return make_range(MIBundleOperands(MI),
                    MIBundleOperands::end(*MI.getParent()));
}

/// VirtRegInfo - Information about a virtual register used by a set of
/// operands.
///
struct VirtRegInfo {
  /// Reads - One of the operands read the virtual register.  This does not
  /// include undef or internal use operands, see MO::readsReg().
  bool Reads;

/// Writes - One of the operands writes the virtual register.
  bool Writes;

/// Tied - Uses and defs must use the same register. This can be because of
  /// a two-address constraint, or there may be a partial redefinition of a
  /// sub-register.
  bool Tied;
};

/// AnalyzeVirtRegInBundle - Analyze how the current instruction or bundle uses
/// a virtual register.  This function should not be called after operator++(),
/// it expects a fresh iterator.
///
/// @param Reg The virtual register to analyze.
/// @param Ops When set, this vector will receive an (MI, OpNum) entry for
///            each operand referring to Reg.
/// @returns A filled-in RegInfo struct.
VirtRegInfo AnalyzeVirtRegInBundle(
    MachineInstr &MI, Register Reg,
    SmallVectorImpl<std::pair<MachineInstr *, unsigned>> *Ops = nullptr);

/// Information about how a physical register Reg is used by a set of
/// operands.
struct PhysRegInfo {
  /// There is a regmask operand indicating Reg is clobbered.
  /// \see MachineOperand::CreateRegMask().
  bool Clobbered;

/// Reg or one of its aliases is defined. The definition may only cover
  /// parts of the register.
  bool Defined;
  /// Reg or a super-register is defined. The definition covers the full
  /// register.
  bool FullyDefined;

/// Reg or one of its aliases is read. The register may only be read
  /// partially.
  bool Read;
  /// Reg or a super-register is read. The full register is read.
  bool FullyRead;

/// Either:
  /// - Reg is FullyDefined and all defs of reg or an overlapping
  ///   register are dead, or
  /// - Reg is completely dead because "defined" by a clobber.
  bool DeadDef;

/// Reg is Defined and all defs of reg or an overlapping register are
  /// dead.
  bool PartialDeadDef;

/// There is a use operand of reg or a super-register with kill flag set.
  bool Killed;
};

/// AnalyzePhysRegInBundle - Analyze how the current instruction or bundle uses
/// a physical register.  This function should not be called after operator++(),
/// it expects a fresh iterator.
///
/// @param Reg The physical register to analyze.
/// @returns A filled-in PhysRegInfo struct.
PhysRegInfo AnalyzePhysRegInBundle(const MachineInstr &MI, Register Reg,
                                   const TargetRegisterInfo *TRI);

} // End llvm namespace

#endif

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