[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 8 commits: Allow CPR on unrestricted constructors

Marge Bot (@marge-bot) gitlab at gitlab.haskell.org
Wed May 31 13:07:05 UTC 2023 


Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC


Commits:
981e5e11 by Arnaud Spiwack at 2023-05-31T08:34:33-04:00
Allow CPR on unrestricted constructors

Per the new `Note [Linting linearity]`, we want optimisations over
trying to preserve linearity. This will allow CPR to handle `Ur`, in
particular.

- - - - -
bf9344d2 by Arnaud Spiwack at 2023-05-31T08:34:33-04:00
Push coercions across multiplicity boundaries

Per the new `Note [Linting linearity]`, we want optimisations over
trying to preserve linearity. This will avoid preventing inlinings and
reductions and make linear programs more efficient.

- - - - -
5f96e9da by sheaf at 2023-05-31T09:06:58-04:00
Data.Bag: add INLINEABLE to polymorphic functions

This commit allows polymorphic methods in GHC.Data.Bag to be
specialised, avoiding having to pass explicit dictionaries when they
are instantiated with e.g. a known monad.

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f1a50626 by sheaf at 2023-05-31T09:06:58-04:00
Split off TcBinderStack into its own module

This commit splits off TcBinderStack into its own module,
to avoid module cycles: we might want to refer to it without also
pulling in the TcM monad.

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cc132db5 by sheaf at 2023-05-31T09:06:58-04:00
Split off TcRef into its own module

This helps avoid pull in the full TcM monad when we just want access
to mutable references in the typechecker. This facilitates later patches
which introduce a slimmed down TcM monad for zonking.

- - - - -
ae80934b by sheaf at 2023-05-31T09:06:58-04:00
Introduce Codensity monad

The Codensity monad is useful to write state-passing computations in
continuation-passing style, e.g. to implement a State monad as
continuation-passing style over a Reader monad.

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60e44bcc by sheaf at 2023-05-31T09:06:58-04:00
Restructure the zonker

This commit splits up the zonker into a few separate components, described
in Note [The structure of the zonker] in `GHC.Tc.Zonk.Type`.

1. `GHC.Tc.Zonk.Monad` introduces a pared-down `TcM` monad, `ZonkM`,
     which has enough information for zonking types.
     This allows us to refactor `ErrCtxt` to use `ZonkM` instead of `TcM`,
     which guarantees we don't throw an error while reporting an error.

2. `GHC.Tc.Zonk.Env` is the new home of `ZonkEnv`, and also defines
    two zonking monad transformers, `ZonkT` and `ZonkBndrT`.
    `ZonkT` is a reader monad transformer over `ZonkEnv`.
    `ZonkBndrT m` is the codensity monad over `ZonkT m`.

     `ZonkBndrT` is used for computations that accumulate binders
     in the `ZonkEnv`.

3. `GHC.Tc.Zonk.TcType` contains the code for zonking types, for use
    in the typechecker. It uses the `ZonkM` monad.

4. `GHC.Tc.Zonk.Type` contains the code for final zonking to `Type`,
    which has been refactored to use `ZonkTcM = ZonkT TcM` and
    `ZonkBndrTcM = ZonkBndrT TcM`.

Allocations slightly decrease on the whole due to using
continuation-passing style instead of manual state passing of ZonkEnv
in the final zonking to Type.

-------------------------
Metric Decrease:
    T4029
    T8095
    T14766
    T15304
    hard_hole_fits
    RecordUpdPerf
Metric Increase:
    T10421
-------------------------

- - - - -
e2173edf by mimi.vx at 2023-05-31T09:07:01-04:00
Update rdt-theme to latest upstream version

Fixes https://gitlab.haskell.org/ghc/ghc/-/issues/23444

- - - - -


30 changed files:

- compiler/GHC/Builtin/Types/Prim.hs
- compiler/GHC/Core/Opt/Arity.hs
- compiler/GHC/Core/Opt/WorkWrap/Utils.hs
- compiler/GHC/Core/Type.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Data/Bag.hs
- compiler/GHC/Data/IOEnv.hs
- compiler/GHC/Driver/Main.hs
- compiler/GHC/Hs/Utils.hs
- compiler/GHC/HsToCore/Binds.hs
- compiler/GHC/HsToCore/Expr.hs
- compiler/GHC/HsToCore/Match/Literal.hs
- compiler/GHC/HsToCore/Pmc/Desugar.hs
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Rename/Names.hs
- compiler/GHC/Rename/Pat.hs
- compiler/GHC/Rename/Splice.hs
- compiler/GHC/Runtime/Eval.hs
- compiler/GHC/Runtime/Heap/Inspect.hs
- compiler/GHC/Tc/Deriv/Generate.hs
- compiler/GHC/Tc/Deriv/Infer.hs
- compiler/GHC/Tc/Deriv/Utils.hs
- compiler/GHC/Tc/Errors.hs
- compiler/GHC/Tc/Errors/Hole.hs
- compiler/GHC/Tc/Errors/Hole.hs-boot
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Bind.hs
- compiler/GHC/Tc/Gen/Default.hs


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/4b423d598444e2024d9716fb20a235ca97f7f24d...e2173edfec04025eb868ea81edda2843c4549852

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