Re: Cannot build ghc HEAD with LLVM ARM due to globalRegMaybe

Alright! Ticket is here, for everyone interested: https://ghc.haskell.org/trac/ghc/ticket/9593 Cheers, Moritz On Sep 15, 2014, at 6:12 PM, Simon Peyton Jones wrote:

We don't yet have a firm policy, but my instinct is that. If they have a ticket, a milestone, a priority, they are less likely to get "lost". It's also easier for people to say on a ticket "is the design right?" than it is on Phab which is optimised for *code* review.

Simon

| -----Original Message----- | From: Moritz Angermann [mailto:moritz@lichtzwerge.de] | Sent: 15 September 2014 13:51 | To: Simon Peyton Jones | Cc: ghc-devs@haskell.org | Subject: Re: Cannot build ghc HEAD with LLVM ARM due to globalRegMaybe | | Dear Simon, | | No, there is not. Should every patch in Phab, have an associated ticket | as well? | | Cheers, | Moritz | | On Sep 15, 2014, at 2:17 PM, Simon Peyton Jones | wrote: | | > Is there a Trac ticket too? | > | > Simon | > | > | -----Original Message----- | > | From: ghc-devs [mailto:ghc-devs-bounces@haskell.org] On Behalf Of | Moritz | > | Angermann | > | Sent: 15 September 2014 10:19 | > | To: ghc-devs@haskell.org | > | Subject: Re: Cannot build ghc HEAD with LLVM ARM due to | globalRegMaybe | > | | > | Hi Janek, | > | | > | yea :) I think it went by unnoticed. Patch is already in Phab, | > | | > | https://phabricator.haskell.org/D208 | > | | > | Not sure how to speed up the review process, though ;-) | > | | > | Cheers, | > | Moritz | > | | > | On Sep 15, 2014, at 11:13 AM, Jan Stolarek | > | wrote: | > | | > | > I think it is best to fill in a bug report and attach a patch - I'm | > | afraid this mail may have gone | > | > unnoticed :-) | > | > | > | > Janek | > | > | > | > Dnia piątek, 12 września 2014, Moritz Angermann napisał: | > | >> Hi, | > | >> | > | >> when trying to compile a ghc HEAD on LLVM ARM, I end up getting an | > | >> exception: | > | >> | > | >> ghc-stage1: panic! (the 'impossible' happened) | > | >> (GHC version 7.9.20140911 for arm-apple-ios): | > | >> globalRegMaybe | > | >> | > | >> After some digging I found that a new call to globalRegMaybe was | > | introduced | > | >> here: | > | >> | http://git.haskell.org/ghc.git/blob/HEAD:/compiler/cmm/CmmSink.hs#l231 | > | on | > | >> 2014-04-29 in commit: | > | >> | > | | http://git.haskell.org/ghc.git/commitdiff/83a003fcaec93dbfd5b46837f2bf335 | > | 34 | > | >> 12b9877 | > | >> | > | >> In a similar timeframe (since 2014-05-02) | /include/CodeGen.Platform.hs | > | was | > | >> changed: | > | >> | > | | http://git.haskell.org/ghc.git/blobdiff/b0534f78a73f972e279eed4447a5687bd | > | 6a | > | >> 8308e..HEAD:/includes/CodeGen.Platform.hs | > | >> | > | >> introducing a set of new ifdef/elif/endif pairs. Especially for | > | >> MACHREGS_NO_REGS, namely: | > | >> | > | >> -#endif | > | >> globalRegMaybe _ = Nothing | > | >> +#elif MACHREGS_NO_REGS | > | >> +globalRegMaybe _ = Nothing | > | >> +#else | > | >> +globalRegMaybe = panic "globalRegMaybe not defined for this | > | platform" | > | >> +#endif | > | >> | > | >> ARM.hs | > | >> | > | | (http://git.haskell.org/ghc.git/blob/23892440032fcab8a6a753916d5068576741 | > | 69 | > | >> ec:/compiler/codeGen/CodeGen/Platform/ARM.hs) however, has: | > | >> | > | >> #define MACHREGS_NO_REGS 0 | > | >> #define MACHREGS_arm 1 | > | >> | > | >> where MACHREGS_arm 1 has no effect on the subsequently imported | > | >> CodeGen.Platform.hs. | > | >> | > | >> Therefore I propose that a change to ARM.hs is made to set | > | >> MACHREGS_NO_REGS to 1. | > | >> | > | >> Cheers, | > | >> Moritz | > | >> _______________________________________________ | > | >> ghc-devs mailing list | > | >> ghc-devs@haskell.org | > | >> http://www.haskell.org/mailman/listinfo/ghc-devs | > | > | > | > | > | | > | _______________________________________________ | > | ghc-devs mailing list | > | ghc-devs@haskell.org | > | http://www.haskell.org/mailman/listinfo/ghc-devs

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