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📄 APFloat.h(48.83 KB)
📄 APInt.h(74.48 KB)
📄 APSInt.h(11.75 KB)
📄 AllocatorList.h(7.53 KB)
📄 Any.h(5.05 KB)
📄 ArrayRef.h(17.92 KB)
📄 BitVector.h(29.74 KB)
📄 Bitfields.h(11.65 KB)
📄 BitmaskEnum.h(5.53 KB)
📄 BreadthFirstIterator.h(4.82 KB)
📄 CachedHashString.h(5.9 KB)
📄 CoalescingBitVector.h(14.91 KB)
📄 DAGDeltaAlgorithm.h(3.13 KB)
📄 DeltaAlgorithm.h(3.54 KB)
📄 DenseMap.h(43.14 KB)
📄 DenseMapInfo.h(11.4 KB)
📄 DenseSet.h(9.33 KB)
📄 DepthFirstIterator.h(10.37 KB)
📄 DirectedGraph.h(9.56 KB)
📄 EnumeratedArray.h(1.6 KB)
📄 EpochTracker.h(3.2 KB)
📄 EquivalenceClasses.h(10.52 KB)
📄 FloatingPointMode.h(5.62 KB)
📄 FoldingSet.h(30.16 KB)
📄 FunctionExtras.h(14.55 KB)
📄 GraphTraits.h(5.71 KB)
📄 Hashing.h(25.12 KB)
📄 ImmutableList.h(7.57 KB)
📄 ImmutableMap.h(10.84 KB)
📄 ImmutableSet.h(37.52 KB)
📄 IndexedMap.h(2.5 KB)
📄 IntEqClasses.h(2.87 KB)
📄 IntervalMap.h(72.88 KB)
📄 IntrusiveRefCntPtr.h(8.1 KB)
📄 MapVector.h(7.79 KB)
📄 None.h(983 B)
📄 Optional.h(10.82 KB)
📄 PackedVector.h(4.17 KB)
📄 PointerEmbeddedInt.h(4.05 KB)
📄 PointerIntPair.h(8.72 KB)
📄 PointerSumType.h(11.61 KB)
📄 PointerUnion.h(10.17 KB)
📄 PostOrderIterator.h(11.05 KB)
📄 PriorityQueue.h(2.69 KB)
📄 PriorityWorklist.h(8.11 KB)
📄 SCCIterator.h(8.02 KB)
📄 STLExtras.h(70.56 KB)
📄 ScopeExit.h(1.83 KB)
📄 ScopedHashTable.h(8.27 KB)
📄 Sequence.h(2.59 KB)
📄 SetOperations.h(2.58 KB)
📄 SetVector.h(9.39 KB)
📄 SmallBitVector.h(20.36 KB)
📄 SmallPtrSet.h(16.93 KB)
📄 SmallSet.h(8.37 KB)
📄 SmallString.h(8.55 KB)
📄 SmallVector.h(32.33 KB)
📄 SparseBitVector.h(26.2 KB)
📄 SparseMultiSet.h(17.83 KB)
📄 SparseSet.h(11.41 KB)
📄 Statistic.h(7.01 KB)
📄 StringExtras.h(13.25 KB)
📄 StringMap.h(15.7 KB)
📄 StringMapEntry.h(4.83 KB)
📄 StringRef.h(31.68 KB)
📄 StringSet.h(1.51 KB)
📄 StringSwitch.h(6.25 KB)
📄 TinyPtrVector.h(10.19 KB)
📄 Triple.h(27.4 KB)
📄 Twine.h(17.48 KB)
📄 TypeSwitch.h(5.82 KB)
📄 UniqueVector.h(3.09 KB)
📄 Waymarking.h(11.96 KB)
📄 bit.h(2.26 KB)
📄 edit_distance.h(3.57 KB)
📄 fallible_iterator.h(8.31 KB)
📄 ilist.h(13.68 KB)
📄 ilist_base.h(2.72 KB)
📄 ilist_iterator.h(7.21 KB)
📄 ilist_node.h(9.84 KB)
📄 ilist_node_base.h(1.7 KB)
📄 ilist_node_options.h(5.07 KB)
📄 iterator.h(13.46 KB)
📄 iterator_range.h(2.22 KB)
📄 simple_ilist.h(10.78 KB)

Editing: IntEqClasses.h

//===-- llvm/ADT/IntEqClasses.h - Equiv. Classes of Integers ----*- 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
//
//===----------------------------------------------------------------------===//
//
// Equivalence classes for small integers. This is a mapping of the integers
// 0 .. N-1 into M equivalence classes numbered 0 .. M-1.
//
// Initially each integer has its own equivalence class. Classes are joined by
// passing a representative member of each class to join().
//
// Once the classes are built, compress() will number them 0 .. M-1 and prevent
// further changes.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_ADT_INTEQCLASSES_H
#define LLVM_ADT_INTEQCLASSES_H

#include "llvm/ADT/SmallVector.h"

namespace llvm {

class IntEqClasses {
  /// EC - When uncompressed, map each integer to a smaller member of its
  /// equivalence class. The class leader is the smallest member and maps to
  /// itself.
  ///
  /// When compressed, EC[i] is the equivalence class of i.
  SmallVector<unsigned, 8> EC;

/// NumClasses - The number of equivalence classes when compressed, or 0 when
  /// uncompressed.
  unsigned NumClasses;

public:
  /// IntEqClasses - Create an equivalence class mapping for 0 .. N-1.
  IntEqClasses(unsigned N = 0) : NumClasses(0) { grow(N); }

/// grow - Increase capacity to hold 0 .. N-1, putting new integers in unique
  /// equivalence classes.
  /// This requires an uncompressed map.
  void grow(unsigned N);

/// clear - Clear all classes so that grow() will assign a unique class to
  /// every integer.
  void clear() {
    EC.clear();
    NumClasses = 0;
  }

/// Join the equivalence classes of a and b. After joining classes,
  /// findLeader(a) == findLeader(b). This requires an uncompressed map.
  /// Returns the new leader.
  unsigned join(unsigned a, unsigned b);

/// findLeader - Compute the leader of a's equivalence class. This is the
  /// smallest member of the class.
  /// This requires an uncompressed map.
  unsigned findLeader(unsigned a) const;

/// compress - Compress equivalence classes by numbering them 0 .. M.
  /// This makes the equivalence class map immutable.
  void compress();

/// getNumClasses - Return the number of equivalence classes after compress()
  /// was called.
  unsigned getNumClasses() const { return NumClasses; }

/// operator[] - Return a's equivalence class number, 0 .. getNumClasses()-1.
  /// This requires a compressed map.
  unsigned operator[](unsigned a) const {
    assert(NumClasses && "operator[] called before compress()");
    return EC[a];
  }

/// uncompress - Change back to the uncompressed representation that allows
  /// editing.
  void uncompress();
};

} // End llvm namespace

#endif

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