llvm/llvm/include/llvm/Transforms/Utils/SimplifyLibCalls.h

//===- SimplifyLibCalls.h - Library call simplifier -------------*- 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 exposes an interface to build some C language libcalls for
// optimization passes that need to call the various functions.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_TRANSFORMS_UTILS_SIMPLIFYLIBCALLS_H
#define LLVM_TRANSFORMS_UTILS_SIMPLIFYLIBCALLS_H

#include "llvm/ADT/STLFunctionalExtras.h"
#include "llvm/Analysis/TargetLibraryInfo.h"

namespace llvm {
class AssumptionCache;
class StringRef;
class Value;
class CallInst;
class DominatorTree;
class DomConditionCache;
class DataLayout;
class Instruction;
class IRBuilderBase;
class Function;
class OptimizationRemarkEmitter;
class BlockFrequencyInfo;
class ProfileSummaryInfo;

/// This class implements simplifications for calls to fortified library
/// functions (__st*cpy_chk, __memcpy_chk, __memmove_chk, __memset_chk), to,
/// when possible, replace them with their non-checking counterparts.
/// Other optimizations can also be done, but it's possible to disable them and
/// only simplify needless use of the checking versions (when the object size
/// is unknown) by passing true for OnlyLowerUnknownSize.
class FortifiedLibCallSimplifier { … };

/// LibCallSimplifier - This class implements a collection of optimizations
/// that replace well formed calls to library functions with a more optimal
/// form.  For example, replacing 'printf("Hello!")' with 'puts("Hello!")'.
class LibCallSimplifier { … };
} // End llvm namespace

#endif