[CodeGen] Match LLVM Legalizer ownership

1 files changed, 61 insertions, 0 deletions

diff --git a/backend/lib/CodeGen/GlobalISel/GISelChangeObserver.cpp b/backend/lib/CodeGen/GlobalISel/GISelChangeObserver.cpp
new file mode 100644
index 0000000..4ce1473
--- /dev/null
+++ b/backend/lib/CodeGen/GlobalISel/GISelChangeObserver.cpp
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "rcc/CodeGen/GlobalISel/GISelChangeObserver.h"
+
+#include <algorithm>
+
+namespace rcc {
+
+void GISelObserverWrapper::addObserver(GISelChangeObserver &Observer) {
+  Observers.push_back(&Observer);
+}
+
+void GISelObserverWrapper::removeObserver(GISelChangeObserver &Observer) {
+  const auto Position = std::ranges::find(Observers, &Observer);
+  if (Position != Observers.end())
+    Observers.erase(Position);
+}
+
+void GISelObserverWrapper::clearObservers() noexcept {
+  Observers.clear();
+}
+
+void GISelObserverWrapper::erasingInstr(MachineInstr &Instruction) {
+  for (GISelChangeObserver *Observer : Observers)
+    Observer->erasingInstr(Instruction);
+}
+
+void GISelObserverWrapper::createdInstr(MachineInstr &Instruction) {
+  for (GISelChangeObserver *Observer : Observers)
+    Observer->createdInstr(Instruction);
+}
+
+void GISelObserverWrapper::changingInstr(MachineInstr &Instruction) {
+  for (GISelChangeObserver *Observer : Observers)
+    Observer->changingInstr(Instruction);
+}
+
+void GISelObserverWrapper::changedInstr(MachineInstr &Instruction) {
+  for (GISelChangeObserver *Observer : Observers)
+    Observer->changedInstr(Instruction);
+}
+
+void GISelObserverWrapper::handleInsertion(MachineInstr &Instruction) {
+  createdInstr(Instruction);
+}
+
+void GISelObserverWrapper::handleRemoval(MachineInstr &Instruction) {
+  erasingInstr(Instruction);
+}
+
+MachineFunctionDelegateInstaller::MachineFunctionDelegateInstaller(
+    MachineFunction &Function, MachineFunction::Delegate &Delegate)
+    : Function(&Function), Delegate(&Delegate) {
+  Function.setDelegate(Delegate);
+}
+
+MachineFunctionDelegateInstaller::~MachineFunctionDelegateInstaller() {
+  Function->resetDelegate(*Delegate);
+}
+
+} // namespace rcc