diff --git a/docs/writeup.txt b/docs/writeup.txt
index f9ceeb6..dd2fb07 100644
--- a/docs/writeup.txt
+++ b/docs/writeup.txt
@@ -25,3 +25,6 @@ Constant foldable expressions, e.g. "size_t myOffset = ((size_t)&((struct task_s
 		-> static assertions happen before plugin could restore const-ness
 	-> plugin callback in build_component_ref (0 miss rate)
 		-> must be type compatible for fold_offsetof
+
+CONSTRUCTORs are only turned into COMPONENT_REF at gimplification
+	-> early gimple pass (before cfg) to replace offsets with calls
diff --git a/playground/spslr_pinpoint.cpp b/playground/spslr_pinpoint.cpp
index e0cfef6..14c49f4 100644
--- a/playground/spslr_pinpoint.cpp
+++ b/playground/spslr_pinpoint.cpp
@@ -695,7 +695,7 @@ int plugin_init (struct plugin_name_args *plugin_info, struct plugin_gcc_version
 
 	register_callback(plugin_info->base_name, PLUGIN_ATTRIBUTES, on_register_attributes, NULL);
 	register_callback(plugin_info->base_name, PLUGIN_FINISH_TYPE, on_type_complete, NULL);
-	// TODO register_callback(plugin_info->base_name, PLUGIN_BUILD_COMPONENT_REF, on_build_component_ref, NULL);
+	register_callback(plugin_info->base_name, PLUGIN_BUILD_COMPONENT_REF, on_build_component_ref, NULL);
 
 	struct register_pass_info log_component_refs_pass_info;
 	log_component_refs_pass_info.pass = new log_component_refs_pass(nullptr);