#15414: Why both gen and gen_no in bdescr? -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: task | Status: new Priority: normal | Milestone: 8.6.1 Component: Runtime System | Version: 8.4.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonmar): IIRC originally we had just the `bd->gen`, and adding `bd->gen_no` was a small optimisation because it saved a few instructions in the inner loop (`evacuate()`). I'm not sure I tried removing `bd->gen`, but I can always be persuaded of anything by data :) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15414#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler