#3990: UNPACK doesn't unbox data families -------------------------------------+------------------------------------- Reporter: rl | Owner: Type: bug | Status: new Priority: low | Milestone: 8.0.1 Component: Compiler | Version: 7.0.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): If it possible that the fix in comment:13 has broken? I am seeing no evidence of unpacking in this example with `master`, {{{#!hs {-# LANGUAGE TypeFamilies #-} module Hi where data family Complex a data instance Complex Double = CD {-# UNPACK #-} !Double {-# UNPACK #-} !Double data T = T {-# UNPACK #-} !(Complex Double) hi :: T hi = T (CD 1 1) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/3990#comment:20 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler