#14152: Float exit paths out of recursive functions -------------------------------------+------------------------------------- Reporter: nomeata | Owner: (none) Type: task | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Resolution: | Keywords: JoinPoints Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #14137 #10918 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj):
the simplifier seems to throw away the idOccInfo.
That's by design. The occ-info after simplification isn't necessarily valid. E.g. {{{ x = e f = \y. ...x... y = ...(f 1)...(f 2)... }}} Currently x occurs once, but after inlining `f` twice, `x` occurs twice. So the simplifier carefullly deletes it. (Except for robust info like "this lambda binder is dead".) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14152#comment:13 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler