llvm/llvm/lib/CodeGen/ExpandPostRAPseudos.cpp

//===-- ExpandPostRAPseudos.cpp - Pseudo instruction expansion pass -------===//
//
// 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 a pass that expands COPY and SUBREG_TO_REG pseudo
// instructions after register allocation.
//
//===----------------------------------------------------------------------===//

#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/InitializePasses.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"

usingnamespacellvm;

#define DEBUG_TYPE …

namespace {
struct ExpandPostRA : public MachineFunctionPass { … };
} // end anonymous namespace

char ExpandPostRA::ID = …;
char &llvm::ExpandPostRAPseudosID = …;

INITIALIZE_PASS(…)

bool ExpandPostRA::LowerSubregToReg(MachineInstr *MI) { … }

/// runOnMachineFunction - Reduce subregister inserts and extracts to register
/// copies.
///
bool ExpandPostRA::runOnMachineFunction(MachineFunction &MF) { … }