While I don't know how to help with your problem I encourage you to attach your code example to #1168. This will certainly be helpful in working on that bug.
Janek Dnia niedziela, 7 grudnia 2014, David Spies napisał: > Ok, so I found that it was an instance of this: > https://ghc.haskell.org/trac/ghc/ticket/1168 > and I read through this whole thread: > https://www.haskell.org/pipermail/glasgow-haskell-users/2008-February/01425 >9.html > > I don't understand the state-hack optimization. It's clearly not safe and > I'm not convinced that it actually is an optimization. In what > circumstances does the state-hack identify a single-entry function that > can't be identified as single-entry by some other (safe) method? > > On Sun, Dec 7, 2014 at 10:52 AM, David Spies <[email protected]> wrote: > > I have a program I wrote to submit for the Car Game problem on Kattis: > > https://open.kattis.com/problems/cargame > > but it runs over the 5-second time-limit > > > > I downloaded the test data and found that on GHC 7.8.3, if I switch from > > -O2 to -O0, it runs three times faster (almost certainly fast enough for > > Kattis to accept). Can someone tell me what's going on? Is this a bug? _______________________________________________ ghc-devs mailing list [email protected] http://www.haskell.org/mailman/listinfo/ghc-devs
