1//===-- lib/CodeGen/GlobalISel/GISelChangeObserver.cpp --------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file constains common code to combine machine functions at generic
10// level.
11//===----------------------------------------------------------------------===//
12
13#include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
14#include "llvm/CodeGen/MachineRegisterInfo.h"
15
16using namespace llvm;
17
18void GISelChangeObserver::changingAllUsesOfReg(
19 const MachineRegisterInfo &MRI, Register Reg) {
20 for (auto &ChangingMI : MRI.use_instructions(Reg)) {
21 changingInstr(MI&: ChangingMI);
22 ChangingAllUsesOfReg.insert(Ptr: &ChangingMI);
23 }
24}
25
26void GISelChangeObserver::finishedChangingAllUsesOfReg() {
27 for (auto *ChangedMI : ChangingAllUsesOfReg)
28 changedInstr(MI&: *ChangedMI);
29 ChangingAllUsesOfReg.clear();
30}
31
32RAIIDelegateInstaller::RAIIDelegateInstaller(MachineFunction &MF,
33 MachineFunction::Delegate *Del)
34 : MF(MF), Delegate(Del) {
35 // Register this as the delegate for handling insertions and deletions of
36 // instructions.
37 MF.setDelegate(Del);
38}
39
40RAIIDelegateInstaller::~RAIIDelegateInstaller() { MF.resetDelegate(delegate: Delegate); }
41
42RAIIMFObserverInstaller::RAIIMFObserverInstaller(MachineFunction &MF,
43 GISelChangeObserver &Observer)
44 : MF(MF) {
45 MF.setObserver(&Observer);
46}
47
48RAIIMFObserverInstaller::~RAIIMFObserverInstaller() { MF.setObserver(nullptr); }
49
50RAIITemporaryObserverInstaller::RAIITemporaryObserverInstaller(
51 GISelObserverWrapper &Observers, GISelChangeObserver &TemporaryObserver)
52 : Observers(Observers), TemporaryObserver(TemporaryObserver) {
53 Observers.addObserver(O: &TemporaryObserver);
54}
55
56RAIITemporaryObserverInstaller::~RAIITemporaryObserverInstaller() {
57 Observers.removeObserver(O: &TemporaryObserver);
58}
59