Hi Joachim! One of the issues I've recently noticed is that the codeGen/should_run/CmmSwitchTest testcase fails on 32-bit architectures [1] due to its use of 64-bit literals. Judging from the commit history of this file I suspect you are the original author of this test. What should we do about this? It seems like one option would be to make the sub-parts of this test which require 64-bit literals conditional on the word size. Cheers, - Ben [1] https://ghc.haskell.org/trac/ghc/ticket/11297