PUBLIC Never mind, I think I got myself confused about different stages of the pipeline. The order of binds generated by Prep is correct, what was tripping me up really was that sat_s2iCp is a local Id bound by a top-level bind. But that's OK, I handle this situation now and everything else works out. Sorry! -----Original Message----- From: ghc-devs On Behalf Of ÉRDI Gergo Sent: Thursday, November 3, 2022 5:47 PM To: GHC Devs Subject: [External] Is Prep supposed to keep thing in (reverse) dependency order? ATTENTION: This email came from an external source. Do not open attachments or click on links from unknown senders or unexpected emails. Always report suspicious emails using the Report As Phishing button in Outlook to protect the Bank and our clients. Hi, I was under the impression that the Prep'd Core is still in reverse dependency order, i.e. if definition A refers to intra-module definition B, then A's binding will always be preceding B's binding. I've been exploiting this (hopefully not made-up and accidental!) property in my work so far. However, for the following input: ``` $s$fFunctorFun_$sfmap :: forall a b. (a -> b) -> Fun '[AnnexType, CSASource, Currency, String] a -> Fun '[AnnexType, CSASource, Currency, String] b $s$fFunctorFun_$sfmap = (\ (@a) (@b) (f :: a -> b) (g :: Fun '[AnnexType, CSASource, Currency, String] a) (x1 :: AnnexType) -> let { g1 :: TFun '[CSASource, Currency, String] a g1 = (g `cast` Co:32) x1 } in (\ (x2 :: CSASource) -> $s$fApplicativeFun_$s$fFunctorFun2 @Currency @a @b f (((g1 `cast` Co:55) x2) `cast` Co:22) `cast` Co:148) `cast` Co:125) ``` I am getting the following output from Prep: ``` sat_s2iCp :: forall a b. (a -> b) -> Fun '[AnnexType, CSASource, Currency, String] a -> Fun '[AnnexType, CSASource, Currency, String] b sat_s2iCp = (\ (@a) (@b) (f :: a -> b) (g :: Fun '[AnnexType, CSASource, Currency, String] a) (x1 :: AnnexType) -> let { g1 :: TFun '[CSASource, Currency, String] a g1 = (g `cast` Co:32) x1 } in let { sat_s2iCo :: CSASource -> Currency -> Fun '[String] b sat_s2iCo = \ (x2 :: CSASource) -> $s$fApplicativeFun_$s$fFunctorFun2 @Currency @a @b f (((g1 `cast` Co:55) x2) `cast` Co:22) } in sat_s2iCo `cast` Co:148) `cast` Co:125 $s$fFunctorFun_$sfmap :: forall a b. (a -> b) -> Fun '[AnnexType, CSASource, Currency, String] a -> Fun '[AnnexType, CSASource, Currency, String] b $s$fFunctorFun_$sfmap = \ (@a) (@b) (eta_B0 :: a -> b) (eta_B1 :: Fun '[AnnexType, CSASource, Currency, String] a) -> sat_s2iCp @a @b eta_B0 eta_B1 ``` Note that the body of `$s$fFunctorFun_$sfmap` has been lifted out to `sat_s2iCp`, but the binding of `sat_s2iCp` precedes the binding of `$s$fFunctorFun_$sfmap`. Is this expected, for some reason, or is this a GHC bug? If the latter, I'm happy to file a ticket but I can't promise an actual end-to-end compilable reproducer... _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org https://clicktime.symantec.com/15tpDJfA3uiEzBJsnQUvo?h=L7HCari1kV6LycjbY5WpaWCMbvgGs4-4hXbMYMfiHcI=&u=http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs This email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please delete all copies and notify the sender immediately. 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