[llvm] [SandboxIR] Add callbacks for instruction insert/remove/move ops (PR #112965)

[via llvm-commits]

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@@ -660,4 +663,53 @@ Module *Context::createModule(llvm::Module *LLVMM) {
   return M;
 }
 
+void Context::runEraseInstrCallbacks(Instruction *I) {
+  for (const auto &CBEntry : EraseInstrCallbacks)
+    CBEntry.second(I);
+}
+
+void Context::runCreateInstrCallbacks(Instruction *I) {
+  for (auto &CBEntry : CreateInstrCallbacks)
+    CBEntry.second(I);
+}
+
+void Context::runMoveInstrCallbacks(Instruction *I, const BBIterator &WhereIt) {
+  for (auto &CBEntry : MoveInstrCallbacks)
+    CBEntry.second(I, WhereIt);
+}
+
+Context::CallbackID Context::registerEraseInstrCallback(EraseInstrCallback CB) {
+  CallbackID ID = NextCallbackID++;
+  EraseInstrCallbacks[ID] = CB;
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vporpo wrote:

How about an assertion on `EraseInstrCallbacks.size()` checking that it's smaller than say 16 ? It could help catch  issues where you keep on registering callbacks by mistake.

https://github.com/llvm/llvm-project/pull/112965