llvm/llvm/lib/CodeGen/ProcessImplicitDefs.cpp

//===---------------------- ProcessImplicitDefs.cpp -----------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

#include "llvm/ADT/SetVector.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/InitializePasses.h"
#include "llvm/Pass.h"
#include "llvm/PassRegistry.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"

usingnamespacellvm;

#define DEBUG_TYPE …

namespace {
/// Process IMPLICIT_DEF instructions and make sure there is one implicit_def
/// for each use. Add isUndef marker to implicit_def defs and their uses.
class ProcessImplicitDefs : public MachineFunctionPass { … };
} // end anonymous namespace

char ProcessImplicitDefs::ID = …;
char &llvm::ProcessImplicitDefsID = …;

INITIALIZE_PASS(…)

void ProcessImplicitDefs::getAnalysisUsage(AnalysisUsage &AU) const { … }

bool ProcessImplicitDefs::canTurnIntoImplicitDef(MachineInstr *MI) { … }

void ProcessImplicitDefs::processImplicitDef(MachineInstr *MI) { … }

/// processImplicitDefs - Process IMPLICIT_DEF instructions and turn them into
/// <undef> operands.
bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &MF) { … }