I've noticed that -dverbose-core2core now (in 7.2) just prints "Simplifier" before each simplifier phase where it used to print something like "Simplifier Phase 1 [main]" or "Simplifier Phase 0 [post-liberate-case]". This was tremendously useful and now I never know where I am when looking at Core. In fact, I spent a bit of time implementing these phase names and at some point at least, GHC accepted options like -ddump-simpl-phases=post-liberate-case which was useful as well. Was there any particular reason for removing this functionality? It really made navigating Core much easier.
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