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📄 APInt.h(74.48 KB)
📄 APSInt.h(11.75 KB)
📄 AllocatorList.h(7.53 KB)
📄 Any.h(5.05 KB)
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📄 BitVector.h(29.74 KB)
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📄 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)
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📄 ImmutableList.h(7.57 KB)
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📄 IndexedMap.h(2.5 KB)
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📄 IntervalMap.h(72.88 KB)
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📄 None.h(983 B)
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📄 STLExtras.h(70.56 KB)
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📄 ScopedHashTable.h(8.27 KB)
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📄 SparseBitVector.h(26.2 KB)
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📄 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)
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📄 iterator.h(13.46 KB)
📄 iterator_range.h(2.22 KB)
📄 simple_ilist.h(10.78 KB)

Editing: DAGDeltaAlgorithm.h

//===- DAGDeltaAlgorithm.h - A DAG Minimization Algorithm ------*- 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_ADT_DAGDELTAALGORITHM_H
#define LLVM_ADT_DAGDELTAALGORITHM_H

#include <set>
#include <utility>
#include <vector>

namespace llvm {

/// DAGDeltaAlgorithm - Implements a "delta debugging" algorithm for minimizing
/// directed acyclic graphs using a predicate function.
///
/// The result of the algorithm is a subset of the input change set which is
/// guaranteed to satisfy the predicate, assuming that the input set did. For
/// well formed predicates, the result set is guaranteed to be such that
/// removing any single element not required by the dependencies on the other
/// elements would falsify the predicate.
///
/// The DAG should be used to represent dependencies in the changes which are
/// likely to hold across the predicate function. That is, for a particular
/// changeset S and predicate P:
///
///   P(S) => P(S union pred(S))
///
/// The minimization algorithm uses this dependency information to attempt to
/// eagerly prune large subsets of changes. As with \see DeltaAlgorithm, the DAG
/// is not required to satisfy this property, but the algorithm will run
/// substantially fewer tests with appropriate dependencies. \see DeltaAlgorithm
/// for more information on the properties which the predicate function itself
/// should satisfy.
class DAGDeltaAlgorithm {
  virtual void anchor();

public:
  using change_ty = unsigned;
  using edge_ty = std::pair<change_ty, change_ty>;

// FIXME: Use a decent data structure.
  using changeset_ty = std::set<change_ty>;
  using changesetlist_ty = std::vector<changeset_ty>;

public:
  virtual ~DAGDeltaAlgorithm() = default;

/// Run - Minimize the DAG formed by the \p Changes vertices and the
  /// \p Dependencies edges by executing \see ExecuteOneTest() on subsets of
  /// changes and returning the smallest set which still satisfies the test
  /// predicate and the input \p Dependencies.
  ///
  /// \param Changes The list of changes.
  ///
  /// \param Dependencies The list of dependencies amongst changes. For each
  /// (x,y) in \p Dependencies, both x and y must be in \p Changes. The
  /// minimization algorithm guarantees that for each tested changed set S,
  /// \f$ x \in S \f$ implies \f$ y \in S \f$. It is an error to have cyclic
  /// dependencies.
  changeset_ty Run(const changeset_ty &Changes,
                   const std::vector<edge_ty> &Dependencies);

/// UpdatedSearchState - Callback used when the search state changes.
  virtual void UpdatedSearchState(const changeset_ty &Changes,
                                  const changesetlist_ty &Sets,
                                  const changeset_ty &Required) {}

/// ExecuteOneTest - Execute a single test predicate on the change set \p S.
  virtual bool ExecuteOneTest(const changeset_ty &S) = 0;
};

} // end namespace llvm

#endif // LLVM_ADT_DAGDELTAALGORITHM_H

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