llvm/llvm/include/llvm/Transforms/Utils/ScalarEvolutionExpander.h

//===---- llvm/Analysis/ScalarEvolutionExpander.h - SCEV Exprs --*- 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 defines the classes used to generate code from scalar expressions.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_TRANSFORMS_UTILS_SCALAREVOLUTIONEXPANDER_H
#define LLVM_TRANSFORMS_UTILS_SCALAREVOLUTIONEXPANDER_H

#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Analysis/InstSimplifyFolder.h"
#include "llvm/Analysis/ScalarEvolutionExpressions.h"
#include "llvm/Analysis/ScalarEvolutionNormalization.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/ValueHandle.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/InstructionCost.h"

namespace llvm {
extern cl::opt<unsigned> SCEVCheapExpansionBudget;

/// struct for holding enough information to help calculate the cost of the
/// given SCEV when expanded into IR.
struct SCEVOperand { … };

struct PoisonFlags { … };

/// This class uses information about analyze scalars to rewrite expressions
/// in canonical form.
///
/// Clients should create an instance of this class when rewriting is needed,
/// and destroy it when finished to allow the release of the associated
/// memory.
class SCEVExpander : public SCEVVisitor<SCEVExpander, Value *> { … };

/// Helper to remove instructions inserted during SCEV expansion, unless they
/// are marked as used.
class SCEVExpanderCleaner { … };
} // namespace llvm

#endif