#14282: tagToEnum# . dataToTag# not optimized away -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: dfeuer Type: bug | Status: new Priority: normal | Milestone: 8.4.1 Component: Compiler | Version: 8.2.1 Resolution: | Keywords: datacon-tags Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by dfeuer): I'm trying, but I've hit a snag. Desugaring (even before optimization) produces {{{ bar :: Bool -> Bool [LclIdX] bar = \ (x_aHq :: Bool) -> case dataToTag# @ Bool x_aHq of wild_00 { __DEFAULT -> tagToEnum# @ Bool wild_00 } end Rec } }}} so looking for the application directly doesn't work. Is there a way to look through the unfolding of `wild_00` to see the `dataToTag#`? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14282#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler