| 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 | |
| 18 | void 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 | |
| 26 | void GISelChangeObserver::finishedChangingAllUsesOfReg() { |
| 27 | for (auto *ChangedMI : ChangingAllUsesOfReg) |
| 28 | changedInstr(MI&: *ChangedMI); |
| 29 | ChangingAllUsesOfReg.clear(); |
| 30 | } |
| 31 | |
| 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 | |
| 40 | RAIIDelegateInstaller::~RAIIDelegateInstaller() { MF.resetDelegate(delegate: Delegate); } |
| 41 | |
| 42 | RAIIMFObserverInstaller::RAIIMFObserverInstaller(MachineFunction &MF, |
| 43 | GISelChangeObserver &Observer) |
| 44 | : MF(MF) { |
| 45 | MF.setObserver(&Observer); |
| 46 | } |
| 47 | |
| 48 | RAIIMFObserverInstaller::~RAIIMFObserverInstaller() { MF.setObserver(nullptr); } |
| 49 |