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
16 using namespace llvm;
17
changingAllUsesOfReg(const MachineRegisterInfo & MRI,Register Reg)18 void GISelChangeObserver::changingAllUsesOfReg(
19 const MachineRegisterInfo &MRI, Register Reg) {
20 for (auto &ChangingMI : MRI.use_instructions(Reg)) {
21 changingInstr(ChangingMI);
22 ChangingAllUsesOfReg.insert(&ChangingMI);
23 }
24 }
25
finishedChangingAllUsesOfReg()26 void GISelChangeObserver::finishedChangingAllUsesOfReg() {
27 for (auto *ChangedMI : ChangingAllUsesOfReg)
28 changedInstr(*ChangedMI);
29 ChangingAllUsesOfReg.clear();
30 }
31
RAIIDelegateInstaller(MachineFunction & MF,MachineFunction::Delegate * Del)32 RAIIDelegateInstaller::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
~RAIIDelegateInstaller()40 RAIIDelegateInstaller::~RAIIDelegateInstaller() { MF.resetDelegate(Delegate); }
41
RAIIMFObserverInstaller(MachineFunction & MF,GISelChangeObserver & Observer)42 RAIIMFObserverInstaller::RAIIMFObserverInstaller(MachineFunction &MF,
43 GISelChangeObserver &Observer)
44 : MF(MF) {
45 MF.setObserver(&Observer);
46 }
47
~RAIIMFObserverInstaller()48 RAIIMFObserverInstaller::~RAIIMFObserverInstaller() { MF.setObserver(nullptr); }
49
RAIITemporaryObserverInstaller(GISelObserverWrapper & Observers,GISelChangeObserver & TemporaryObserver)50 RAIITemporaryObserverInstaller::RAIITemporaryObserverInstaller(
51 GISelObserverWrapper &Observers, GISelChangeObserver &TemporaryObserver)
52 : Observers(Observers), TemporaryObserver(TemporaryObserver) {
53 Observers.addObserver(&TemporaryObserver);
54 }
55
~RAIITemporaryObserverInstaller()56 RAIITemporaryObserverInstaller::~RAIITemporaryObserverInstaller() {
57 Observers.removeObserver(&TemporaryObserver);
58 }
59