Change in demand analysis results between 7.10.2 and RC1 (not fixed in RC2 and HEAD)

[Ömer Sinan Ağacan]

Thanks, but that patch looks like for CPR. In our case demands are
changed, so I don't see how that's related. Am I missing anything in
that patch?

2016-02-27 3:49 GMT-05:00 Joachim Breitner <mail at joachim-breitner.de>:
> Hi,
> Am Freitag, den 26.02.2016, 22:12 -0500 schrieb Ömer Sinan Ağacan:
>> While working on demand analyzer today we realized that there has
>> been some changes in demand analysis results between GHC 7.10.2 and
>> 8.0-rc2.
>
>
> a quick git log highlights this commit, as it relates to strict data
> constructors: 0696fc6d4de28cb589f6c751b8491911a5baf774
>
> commit 0696fc6d4de28cb589f6c751b8491911a5baf774
> Author: Simon Peyton Jones <simonpj at microsoft.com>
> Date:   Fri Jun 26 11:40:01 2015 +0100
>
>     Improve CPR behavior for strict constructors
>
>     When working on Trac #10482 I noticed that we could give constructor
>     arguments the CPR property if they are use strictly.
>
>     This is documented carefully in
>         Note [CPR in a product case alternative]
>     and also
>         Note [Initial CPR for strict binders]
>
>     There are a bunch of intersting examples in
>         Note [CPR examples]
>     which I have added to the test suite as T10482a.
>
>     I also added a test for #10482 itself.
>
> I did not investigate whether this could actually have effected¹ this
> change.
>
> Greetings,
> Joachim
>
> ¹ How do you recognize a regular xkcd reader?
>   He uses effect as an verb. https://xkcd.com/326/
>
> --
> --
> Joachim “nomeata” Breitner
>   mail at joachim-breitner.de • https://www.joachim-breitner.de/
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>   Debian Developer: nomeata at debian.org
>
>
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