#14282: tagToEnum# . dataToTag# not optimized away -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: dfeuer Type: bug | Status: patch Priority: normal | Milestone: 8.6.1 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): Phab:D4375 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari <ben@…>): In [changeset:"517c194095064c123b18b779c96c0866e0b3a6d9/ghc" 517c1940/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="517c194095064c123b18b779c96c0866e0b3a6d9" Document missing dataToTag# . tagToEnum# rule Explain why we don't have a rule to optimize `dataToTag# (tagToEnum# x)` to `x`. [skip ci] Reviewers: bgamari Reviewed By: bgamari Subscribers: rwbarton, thomie, carter GHC Trac Issues: #14282 Differential Revision: https://phabricator.haskell.org/D4375 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14282#comment:10> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler