llvm/llvm/lib/CodeGen/TailDuplication.cpp

//===- TailDuplication.cpp - Duplicate blocks into predecessors' tails ----===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
/// \file This pass duplicates basic blocks ending in unconditional branches
/// into the tails of their predecessors, using the TailDuplicator utility
/// class.
//
//===----------------------------------------------------------------------===//

#include "llvm/Analysis/ProfileSummaryInfo.h"
#include "llvm/CodeGen/LazyMachineBlockFrequencyInfo.h"
#include "llvm/CodeGen/MBFIWrapper.h"
#include "llvm/CodeGen/MachineBranchProbabilityInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/TailDuplicator.h"
#include "llvm/InitializePasses.h"
#include "llvm/Pass.h"
#include "llvm/PassRegistry.h"

usingnamespacellvm;

#define DEBUG_TYPE …

namespace {

class TailDuplicateBase : public MachineFunctionPass { … };

class TailDuplicate : public TailDuplicateBase { … };

class EarlyTailDuplicate : public TailDuplicateBase { … };

} // end anonymous namespace

char TailDuplicate::ID;
char EarlyTailDuplicate::ID;

char &llvm::TailDuplicateID = …;
char &llvm::EarlyTailDuplicateID = …;

INITIALIZE_PASS(…)
INITIALIZE_PASS(…)

bool TailDuplicateBase::runOnMachineFunction(MachineFunction &MF) { … }