#9279: Local wrapper function remains in final program; result = extra closure allocation -------------------------------------+------------------------------------- Reporter: simonmar | Owner: simonpj Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Resolution: | Keywords: Operating System: | Architecture: Unknown/Multiple Unknown/Multiple | Difficulty: Unknown Type of failure: Runtime | Blocked By: performance bug | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by nfrisby): Based only on the eye-balled free variable analysis of $wa4, I think that the current late lambda lift implementation would lift $wa4. ipv7_X5Ne is the only free variable I see in the closure, so replacing $wa4 with ip7_X5Ne in a2_s6lH would not constitute closure growth, which is what would most likely prevent the lift. (I'm assuming $wa4 is not LNE.) I'll attempt the repro with my local build and let you know for sure. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9279#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler