llvm/llvm/include/llvm/CodeGen/LiveRangeCalc.h

//===- LiveRangeCalc.h - Calculate live ranges -----------------*- 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
//
//===----------------------------------------------------------------------===//
//
// The LiveRangeCalc class can be used to implement the computation of
// live ranges from scratch.
// It caches information about values in the CFG to speed up repeated
// operations on the same live range.  The cache can be shared by
// non-overlapping live ranges. SplitKit uses that when computing the live
// range of split products.
//
// A low-level interface is available to clients that know where a variable is
// live, but don't know which value it has as every point.  LiveRangeCalc will
// propagate values down the dominator tree, and even insert PHI-defs where
// needed. SplitKit uses this faster interface when possible.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_LIVERANGECALC_H
#define LLVM_CODEGEN_LIVERANGECALC_H

#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/IndexedMap.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/LiveInterval.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/SlotIndexes.h"
#include <utility>

namespace llvm {

template <class NodeT> class DomTreeNodeBase;
class MachineDominatorTree;
class MachineFunction;
class MachineRegisterInfo;

MachineDomTreeNode;

class LiveRangeCalc { … };

} // end namespace llvm

#endif // LLVM_CODEGEN_LIVERANGECALC_H