1 //===-- lib/CodeGen/GlobalISel/GISelChangeObserver.cpp --------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file constains common code to combine machine functions at generic
11 // level.
12 //===----------------------------------------------------------------------===//
13 
14 #include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
15 #include "llvm/CodeGen/MachineRegisterInfo.h"
16 
17 using namespace llvm;
18 
changingAllUsesOfReg(const MachineRegisterInfo & MRI,unsigned Reg)19 void GISelChangeObserver::changingAllUsesOfReg(
20     const MachineRegisterInfo &MRI, unsigned Reg) {
21   for (auto &ChangingMI : MRI.use_instructions(Reg)) {
22     changingInstr(ChangingMI);
23     ChangingAllUsesOfReg.insert(&ChangingMI);
24   }
25 }
26 
finishedChangingAllUsesOfReg()27 void GISelChangeObserver::finishedChangingAllUsesOfReg() {
28   for (auto *ChangedMI : ChangingAllUsesOfReg)
29     changedInstr(*ChangedMI);
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