Thanks Matt, that makes sense. I applied the same idea to another Id and now it's also never inlined now, so I can confirm that this works. Ömer Matthew Pickering <matthewtpickering@gmail.com>, 17 Tem 2019 Çar, 11:05 tarihinde şunu yazdı:
I think it doesn't get inlined because we don't add an unfolding in the definition of `lazyId` in `MkId`.
The definition in `GHC.Magic` is just for documentation I think.
Cheers,
Matt
On Wed, Jul 17, 2019 at 8:46 AM Ömer Sinan Ağacan <omeragacan@gmail.com> wrote:
Hi Simon,
I'm trying to understand what's preventing inlining GHC.Magic.lazy. I can see with -ddump-simpl -ddump-simpl-iterations -ddump-prep that we only eliminate it in CorePrep, so it's preserved during simplifications and tidying, but I don't see how. It doesn't have a NOINLINE pragma, and we don't check whether the id we're inlining is lazyId (using MkId.lazyId or MkId.lazyIdKey) anywhere in the compiler as far as I can see.
I also checked Note [lazyId magic] in MkId, but it doesn't explain how we avoid inlining it.
Could you say a few words on this?
Thanks Ömer _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs