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//===-- lib/CodeGen/GlobalISel/GISelChangeObserver.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
//
//===----------------------------------------------------------------------===//
//
// This file constains common code to combine machine functions at generic
// level.
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
using namespace llvm;
void GISelChangeObserver::changingAllUsesOfReg(
const MachineRegisterInfo &MRI, Register Reg) {
for (auto &ChangingMI : MRI.use_instructions(Reg)) {
changingInstr(ChangingMI);
ChangingAllUsesOfReg.insert(&ChangingMI);
}
}
void GISelChangeObserver::finishedChangingAllUsesOfReg() {
for (auto *ChangedMI : ChangingAllUsesOfReg)
changedInstr(*ChangedMI);
ChangingAllUsesOfReg.clear();
}
RAIIDelegateInstaller::RAIIDelegateInstaller(MachineFunction &MF,
MachineFunction::Delegate *Del)
: MF(MF), Delegate(Del) {
// Register this as the delegate for handling insertions and deletions of
// instructions.
MF.setDelegate(Del);
}
RAIIDelegateInstaller::~RAIIDelegateInstaller() { MF.resetDelegate(Delegate); }
RAIIMFObserverInstaller::RAIIMFObserverInstaller(MachineFunction &MF,
GISelChangeObserver &Observer)
: MF(MF) {
MF.setObserver(&Observer);
}
RAIIMFObserverInstaller::~RAIIMFObserverInstaller() { MF.setObserver(nullptr); }
RAIITemporaryObserverInstaller::RAIITemporaryObserverInstaller(
GISelObserverWrapper &Observers, GISelChangeObserver &TemporaryObserver)
: Observers(Observers), TemporaryObserver(TemporaryObserver) {
Observers.addObserver(&TemporaryObserver);
}
RAIITemporaryObserverInstaller::~RAIITemporaryObserverInstaller() {
Observers.removeObserver(&TemporaryObserver);
}
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