llvm/llvm/include/llvm/Transforms/Utils/SSAUpdaterBulk.h

//===- SSAUpdaterBulk.h - Unstructured SSA Update Tool ----------*- 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 declares the SSAUpdaterBulk class.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_TRANSFORMS_UTILS_SSAUPDATERBULK_H
#define LLVM_TRANSFORMS_UTILS_SSAUPDATERBULK_H

#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/IR/PredIteratorCache.h"

namespace llvm {

class BasicBlock;
class PHINode;
template <typename T> class SmallVectorImpl;
class Type;
class Use;
class Value;
class DominatorTree;

/// Helper class for SSA formation on a set of values defined in multiple
/// blocks.
///
/// This is used when code duplication or another unstructured transformation
/// wants to rewrite a set of uses of one value with uses of a set of values.
/// The update is done only when RewriteAllUses is called, all other methods are
/// used for book-keeping. That helps to share some common computations between
/// updates of different uses (which is not the case when traditional SSAUpdater
/// is used).
class SSAUpdaterBulk { … };

} // end namespace llvm

#endif // LLVM_TRANSFORMS_UTILS_SSAUPDATERBULK_H