#14951: SpecContsr needs two runs when one should suffice -------------------------------------+------------------------------------- Reporter: nomeata | Owner: (none) Type: task | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.2 Resolution: | Keywords: SpecConstr Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #14844 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by nomeata): You are thinking one step ahead. But it does not need something analogous to demand signatures: The !SpecConstr code already gathers all calls to `f` and remembers them when it specializes `f`, so we can add the `ArgOcc` information there, without having the LetUp vs. LetDown dilemma. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14951#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler