File Manager

003 File Manager

Current Path: /usr/src/contrib/llvm-project/llvm/lib/CodeGen

usr / src / contrib / llvm-project / llvm / lib / CodeGen /

📁 ..
📄 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: BranchFolding.h

//===- BranchFolding.h - Fold machine code branch instructions --*- 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
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_CODEGEN_BRANCHFOLDING_H
#define LLVM_LIB_CODEGEN_BRANCHFOLDING_H

#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/CodeGen/LivePhysRegs.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/Support/Compiler.h"
#include <cstdint>
#include <vector>

namespace llvm {

class BasicBlock;
class MachineBranchProbabilityInfo;
class MachineFunction;
class MachineLoopInfo;
class MachineModuleInfo;
class MachineRegisterInfo;
class MBFIWrapper;
class ProfileSummaryInfo;
class TargetInstrInfo;
class TargetRegisterInfo;

class LLVM_LIBRARY_VISIBILITY BranchFolder {
  public:
    explicit BranchFolder(bool defaultEnableTailMerge,
                          bool CommonHoist,
                          MBFIWrapper &FreqInfo,
                          const MachineBranchProbabilityInfo &ProbInfo,
                          ProfileSummaryInfo *PSI,
                          // Min tail length to merge. Defaults to commandline
                          // flag. Ignored for optsize.
                          unsigned MinTailLength = 0);

/// Perhaps branch folding, tail merging and other CFG optimizations on the
    /// given function.  Block placement changes the layout and may create new
    /// tail merging opportunities.
    bool OptimizeFunction(MachineFunction &MF, const TargetInstrInfo *tii,
                          const TargetRegisterInfo *tri,
                          MachineLoopInfo *mli = nullptr,
                          bool AfterPlacement = false);

private:
    class MergePotentialsElt {
      unsigned Hash;
      MachineBasicBlock *Block;

public:
      MergePotentialsElt(unsigned h, MachineBasicBlock *b)
        : Hash(h), Block(b) {}

unsigned getHash() const { return Hash; }
      MachineBasicBlock *getBlock() const { return Block; }

void setBlock(MachineBasicBlock *MBB) {
        Block = MBB;
      }

bool operator<(const MergePotentialsElt &) const;
    };

using MPIterator = std::vector<MergePotentialsElt>::iterator;

std::vector<MergePotentialsElt> MergePotentials;
    SmallPtrSet<const MachineBasicBlock*, 2> TriedMerging;
    DenseMap<const MachineBasicBlock *, int> EHScopeMembership;

class SameTailElt {
      MPIterator MPIter;
      MachineBasicBlock::iterator TailStartPos;

public:
      SameTailElt(MPIterator mp, MachineBasicBlock::iterator tsp)
        : MPIter(mp), TailStartPos(tsp) {}

MPIterator getMPIter() const {
        return MPIter;
      }

MergePotentialsElt &getMergePotentialsElt() const {
        return *getMPIter();
      }

MachineBasicBlock::iterator getTailStartPos() const {
        return TailStartPos;
      }

unsigned getHash() const {
        return getMergePotentialsElt().getHash();
      }

MachineBasicBlock *getBlock() const {
        return getMergePotentialsElt().getBlock();
      }

bool tailIsWholeBlock() const {
        return TailStartPos == getBlock()->begin();
      }

void setBlock(MachineBasicBlock *MBB) {
        getMergePotentialsElt().setBlock(MBB);
      }

void setTailStartPos(MachineBasicBlock::iterator Pos) {
        TailStartPos = Pos;
      }
    };
    std::vector<SameTailElt> SameTails;

bool AfterBlockPlacement;
    bool EnableTailMerge;
    bool EnableHoistCommonCode;
    bool UpdateLiveIns;
    unsigned MinCommonTailLength;
    const TargetInstrInfo *TII;
    const MachineRegisterInfo *MRI;
    const TargetRegisterInfo *TRI;
    MachineLoopInfo *MLI;
    LivePhysRegs LiveRegs;

private:
    MBFIWrapper &MBBFreqInfo;
    const MachineBranchProbabilityInfo &MBPI;
    ProfileSummaryInfo *PSI;

bool TailMergeBlocks(MachineFunction &MF);
    bool TryTailMergeBlocks(MachineBasicBlock* SuccBB,
                       MachineBasicBlock* PredBB,
                       unsigned MinCommonTailLength);
    void setCommonTailEdgeWeights(MachineBasicBlock &TailMBB);

/// Delete the instruction OldInst and everything after it, replacing it
    /// with an unconditional branch to NewDest.
    void replaceTailWithBranchTo(MachineBasicBlock::iterator OldInst,
                                 MachineBasicBlock &NewDest);

/// Given a machine basic block and an iterator into it, split the MBB so
    /// that the part before the iterator falls into the part starting at the
    /// iterator.  This returns the new MBB.
    MachineBasicBlock *SplitMBBAt(MachineBasicBlock &CurMBB,
                                  MachineBasicBlock::iterator BBI1,
                                  const BasicBlock *BB);

/// Look through all the blocks in MergePotentials that have hash CurHash
    /// (guaranteed to match the last element).  Build the vector SameTails of
    /// all those that have the (same) largest number of instructions in common
    /// of any pair of these blocks.  SameTails entries contain an iterator into
    /// MergePotentials (from which the MachineBasicBlock can be found) and a
    /// MachineBasicBlock::iterator into that MBB indicating the instruction
    /// where the matching code sequence begins.  Order of elements in SameTails
    /// is the reverse of the order in which those blocks appear in
    /// MergePotentials (where they are not necessarily consecutive).
    unsigned ComputeSameTails(unsigned CurHash, unsigned minCommonTailLength,
                              MachineBasicBlock *SuccBB,
                              MachineBasicBlock *PredBB);

/// Remove all blocks with hash CurHash from MergePotentials, restoring
    /// branches at ends of blocks as appropriate.
    void RemoveBlocksWithHash(unsigned CurHash, MachineBasicBlock* SuccBB,
                                                MachineBasicBlock* PredBB);

/// None of the blocks to be tail-merged consist only of the common tail.
    /// Create a block that does by splitting one.
    bool CreateCommonTailOnlyBlock(MachineBasicBlock *&PredBB,
                                   MachineBasicBlock *SuccBB,
                                   unsigned maxCommonTailLength,
                                   unsigned &commonTailIndex);

/// Create merged DebugLocs of identical instructions across SameTails and
    /// assign it to the instruction in common tail; merge MMOs and undef flags.
    void mergeCommonTails(unsigned commonTailIndex);

bool OptimizeBranches(MachineFunction &MF);

/// Analyze and optimize control flow related to the specified block. This
    /// is never called on the entry block.
    bool OptimizeBlock(MachineBasicBlock *MBB);

/// Remove the specified dead machine basic block from the function,
    /// updating the CFG.
    void RemoveDeadBlock(MachineBasicBlock *MBB);

/// Hoist common instruction sequences at the start of basic blocks to their
    /// common predecessor.
    bool HoistCommonCode(MachineFunction &MF);

/// If the successors of MBB has common instruction sequence at the start of
    /// the function, move the instructions before MBB terminator if it's legal.
    bool HoistCommonCodeInSuccs(MachineBasicBlock *MBB);
  };

} // end namespace llvm

#endif // LLVM_LIB_CODEGEN_BRANCHFOLDING_H

003 File Manager

Editing: BranchFolding.h

Upload File

Create Folder