diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3592c88..e8a3ec7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,6 +30,9 @@ set(INSTALL_PKGCONFIG_DIR "${GSKIT}/lib/pkgconfig" CACHE PATH "Installation dire
 set(GSKIT_EXTERNAL_LIBS "")
 set(GSKIT_EXTERNAL_INCLUDES "")
 
+# Enable interprocedural optimization LTO
+set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
+
 set(CUR_GIT_TAG v0.0.0)
 find_package(Git)
 if(GIT_FOUND)
@@ -125,6 +128,8 @@ add_object_library_macros(GS_CORE_OBJS ee/gs/src/gsCore.c
 	gsKit_remove_vsync_handler
 	gsKit_add_hsync_handler
 	gsKit_remove_hsync_handler
+	gsKit_add_finish_handler
+	gsKit_remove_finish_handler
 	gsKit_clear
 	gsKit_set_scissor
 	gsKit_set_test
diff --git a/ee/gs/include/gsCore.h b/ee/gs/include/gsCore.h
index 972d600..e76c453 100644
--- a/ee/gs/include/gsCore.h
+++ b/ee/gs/include/gsCore.h
@@ -152,6 +152,12 @@ int gsKit_add_hsync_handler(int (*hsync_callback)());
 /// Removes a hsync interrupt handler
 void gsKit_remove_hsync_handler(int callback_id);
 
+/// Installs a finish interrupt handler
+int gsKit_add_finish_handler(int (*finish_callback)());
+
+/// Removes a finish interrupt handler
+void gsKit_remove_finish_handler(int callback_id);
+
 /// Sets gsGlobal->EvenOrOdd depending on current field drawing
 void gsKit_get_field(GSGLOBAL *gsGlobal);
 
diff --git a/ee/gs/src/gsCore.c b/ee/gs/src/gsCore.c
index 095eea4..ef66214 100644
--- a/ee/gs/src/gsCore.c
+++ b/ee/gs/src/gsCore.c
@@ -252,6 +252,34 @@ void gsKit_remove_hsync_handler(int callback_id)
 }
 #endif
 
+#if F_gsKit_add_finish_handler
+int gsKit_add_finish_handler(int (*finish_callback)())
+{
+	int callback_id;
+
+	DIntr();
+	callback_id = AddIntcHandler(INTC_GS, finish_callback, 0);
+	EnableIntc(INTC_GS);
+	// Unmask Finish interrupt
+	GsPutIMR(GsGetIMR() & ~0x0200);
+	EIntr();
+
+	return callback_id;
+}
+#endif
+
+#if F_gsKit_remove_finish_handler
+void gsKit_remove_finish_handler(int callback_id)
+{
+	DIntr();
+	// Mask HSync interrupt
+	GsPutIMR(GsGetIMR() | 0x0200);
+	DisableIntc(INTC_GS);
+	RemoveIntcHandler(INTC_GS, callback_id);
+	EIntr();
+}
+#endif
+
 #if F_gsKit_clear
 #define MIN(X, Y) (((X) < (Y)) ? (X) : (Y))
 void gsKit_clear(GSGLOBAL *gsGlobal, u64 color)