Re: [GHC] #6056: INLINABLE pragma prevents worker-wrapper to happen.

#6056: INLINABLE pragma prevents worker-wrapper to happen. --------------------------------------------+------------------------------ Reporter: milan | Owner: simonpj Type: bug | Status: new Priority: normal | Milestone: 7.10.1 Component: Compiler | Version: 7.4.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime performance bug | Unknown/Multiple Test Case: | Difficulty: Unknown Blocking: | Blocked By: | Related Tickets: --------------------------------------------+------------------------------ Comment (by Simon Peyton Jones ): In [changeset:"9cf5906b692c31b7ec67856b0859cb0e33770651/ghc"]: {{{ #!CommitTicketReference repository="ghc" revision="9cf5906b692c31b7ec67856b0859cb0e33770651" Make worker/wrapper work on INLINEABLE things This fixes a long-standing bug: Trac #6056. The trouble was that INLINEABLE "used up" the unfolding for the Id, so it couldn't be worker/wrapper'd by the strictness analyser. This patch allows the w/w to go ahead, and makes the *worker* INLINEABLE instead, so it can later be specialised. However, that doesn't completely solve the problem, because the dictionary argument (which the specialiser treats specially) may be strict and hence unpacked by w/w, so now the worker won't be specilialised after all. Solution: never unpack dictionary arguments, which is done by the isClassTyCon test in WwLib.deepSplitProductType_maybe }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/6056#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler