[GHC] #7684: cgrun071 segfaults

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[GHC] #7684: cgrun071 segfaults

Muhaimin Ahsan
Here's the dumped asm: http://ghc.haskell.org/trac/ghc/attachment/ticket/7684/cgrun071.S

Muhaimin Ahsan

On Sep 5, 2013, at 12:06 PM, "GHC" <ghc-devs at haskell.org> wrote:

> #7684: cgrun071 segfaults
> ----------------------------------+----------------------------------
>        Reporter:  tibbe          |            Owner:  leroux
>            Type:  bug            |           Status:  new
>        Priority:  normal         |        Milestone:  7.8.1
>       Component:  Compiler       |          Version:  7.7
>      Resolution:                 |         Keywords:
> Operating System:  MacOS X        |     Architecture:  x86_64 (amd64)
> Type of failure:  Runtime crash  |       Difficulty:  Unknown
>       Test Case:  cgrun071       |       Blocked By:
>        Blocking:                 |  Related Tickets:
> ----------------------------------+----------------------------------
>
> Comment (by tibbe):
>
> I'm confused. The test isn't compiled with -msse42 and thus the popcnt
> instruction should never be omitted (check the output assembly to make
> sure) so it seems more likely that the failure has to do with narrowing.
>
> --
> Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7684#comment:20>
> GHC <http://www.haskell.org/ghc/>
> The Glasgow Haskell Compiler

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[GHC] #7684: cgrun071 segfaults

Carter Schonwald
so is the problem in the code generator or the slowpopcount?


On Thu, Sep 5, 2013 at 2:00 PM, Muhaimin Ahsan <leroux at fezrev.com> wrote:

> Here's the dumped asm:
> http://ghc.haskell.org/trac/ghc/attachment/ticket/7684/cgrun071.S
>
> Muhaimin Ahsan
>
> On Sep 5, 2013, at 12:06 PM, "GHC" <ghc-devs at haskell.org> wrote:
>
> > #7684: cgrun071 segfaults
> > ----------------------------------+----------------------------------
> >        Reporter:  tibbe          |            Owner:  leroux
> >            Type:  bug            |           Status:  new
> >        Priority:  normal         |        Milestone:  7.8.1
> >       Component:  Compiler       |          Version:  7.7
> >      Resolution:                 |         Keywords:
> > Operating System:  MacOS X        |     Architecture:  x86_64 (amd64)
> > Type of failure:  Runtime crash  |       Difficulty:  Unknown
> >       Test Case:  cgrun071       |       Blocked By:
> >        Blocking:                 |  Related Tickets:
> > ----------------------------------+----------------------------------
> >
> > Comment (by tibbe):
> >
> > I'm confused. The test isn't compiled with -msse42 and thus the popcnt
> > instruction should never be omitted (check the output assembly to make
> > sure) so it seems more likely that the failure has to do with narrowing.
> >
> > --
> > Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7684#comment:20>
> > GHC <http://www.haskell.org/ghc/>
> > The Glasgow Haskell Compiler
>
>
> _______________________________________________
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> ghc-devs at haskell.org
> http://www.haskell.org/mailman/listinfo/ghc-devs
>
>
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