#11284: Lambda-lifting fails in simple Text example -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: duplicate | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #5945, #11318 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by sgraf): * cc: sgraf (added) Comment: Sorry, I didn't pick your reply up in the ticket noise. I ''think'' we would pick it up. This is the STG binding for `$wloop_length`: https://gist.github.com/sgraf812/fcfda9e55004d19881314e31fdea4423 As this turned into a join point anyway, no closure mentions `$wloop`, so there will be no positive closure growth (e.g. penalties in allocations). `$wloop` also has only 3 free variables, which adds with the 2 arguments to a fortunate 5, so there would be enough hardware registers for the lift. I don't see any reason we wouldn't have lifted it. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11284#comment:21 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler