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, unsigned Reg) {
20   for (auto &ChangingMI : MRI.use_instructions(Reg)) {
21     changingInstr(ChangingMI);
22     ChangingAllUsesOfReg.insert(&ChangingMI);
23   }
24 }
25 
26 void GISelChangeObserver::finishedChangingAllUsesOfReg() {
27   for (auto *ChangedMI : ChangingAllUsesOfReg)
28     changedInstr(*ChangedMI);
29 }
30 
31 RAIIDelegateInstaller::RAIIDelegateInstaller(MachineFunction &MF,
32                                              MachineFunction::Delegate *Del)
33     : MF(MF), Delegate(Del) {
34   // Register this as the delegate for handling insertions and deletions of
35   // instructions.
36   MF.setDelegate(Del);
37 }
38 
39 RAIIDelegateInstaller::~RAIIDelegateInstaller() { MF.resetDelegate(Delegate); }
40