core to core plugin before inline

Hello, I'm trying to fix an error in https://github.com/conal/concat. The problem is the core to core passes of the plugin are way to slow for simple functions. For slightly more complicated one but still simple functions, it fails after a long time of compiling (see the errGrad tests in examples/test/Examples.hs). We suppose that the problem is related to inline. Is there a way to run the core-to-core passes of the plugin before inline. Best regards Florian Engel