#10918: Float once-used let binding into a recursive function -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: task | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): -------------------------------------+------------------------------------- Comment (by nomeata): A side effect of Call Arity setting the once-used flag on bindings is that the code generator does not create update code for such thunks (good!). With paraffin something goes wrong, and allocation skyrockets. Unfortnately, I was not able to pin-point what goes wrong, despite pulling out the ticky-ticky-hammer. (Wishful thinking: A tool that takes a -ddump-prep and a ticky report, annotates the bindings with the ticky numbers, and then removes all uniques from the report, so that I can diff that with a different compilation without the uniques obscuring the diff.) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10918#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler