#15155: How untagged pointers sneak into banged fields -------------------------------------+------------------------------------- Reporter: heisenbug | Owner: heisenbug Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.4.2 Resolution: | Keywords: CodeGen Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: 14677 Related Tickets: #13027 #7308 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by heisenbug): While building ghc stage2 I've seen well over a thousand of these indirections being generated. I am working on a scheme which would allow putting all representationally equivalent (e.g. those wrapped by `cast`) bindings into an equivalence class and refer to the whole thing (by the non-casted representant) from the untyped stages (i.e. STG) on. With looming code-reuse techniques like ''GND'' (and I am looking at you `DerivingVia`) there will be much more coercing and casting going on, so I think this will become even more urgent in the future. Besides it would eliminate name table entries from `.so` files etc., speeding up (dynamic) linking a bit and saving even more space. Optionally the name canonicalisation could happen at the point where the assembly file is emitted. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15155#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler