[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 9 commits: rts: Add --copying-gc flag to reverse effect of --nonmoving-gc

[Marge Bot]

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


Commits:
5ebedd54 by Ben Gamari at 2020-07-17T06:25:01-04:00
rts: Add --copying-gc flag to reverse effect of --nonmoving-gc

Fixes #18281.

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d8043547 by Hécate at 2020-07-17T06:25:03-04:00
Implement `fullCompilerVersion`

Follow-up of https://gitlab.haskell.org/ghc/ghc/-/issues/18403

This MR adds `fullCompilerVersion`, a function that shares the same
backend as the `--numeric-version` GHC flag, exposing a full,
three-digit version datatype.

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8b18ad12 by Hécate at 2020-07-17T06:25:03-04:00
Add a Lint hadrian rule and an .hlint.yaml file in base/

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96f8ab48 by Simon Peyton Jones at 2020-07-17T06:25:04-04:00
Allow multiple case branches to have a higher rank type

As #18412 points out, it should be OK for multiple case alternatives
to have a higher rank type, provided they are all the same.

This patch implements that change.  It sweeps away
GHC.Tc.Gen.Match.tauifyMultipleBranches, and friends, replacing it
with an enhanced version of fillInferResult.

The basic change to fillInferResult is to permit the case in which
another case alternative has already filled in the result; and in
that case simply unify.  It's very simple actually.

See the new Note [fillInferResult] in TcMType

Other refactoring:

- Move all the InferResult code to one place, in GHC.Tc.Utils.TcMType
  (previously some of it was in Unify)

- Move tcInstType and friends from TcMType to Instantiate, where it
  more properly belongs.  (TCMType was getting very long.)

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8dc1f539 by Simon Peyton Jones at 2020-07-17T06:25:04-04:00
Improve typechecking of NPlusK patterns

This patch (due to Richard Eisenberg) improves
documentation of the wrapper returned by tcSubMult
(see Note [Wrapper returned from tcSubMult] in
 GHC.Tc.Utils.Unify).

And, more substantially, it cleans up the multiplicity
handling in the typechecking of NPlusKPat

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7421f3f1 by Krzysztof Gogolewski at 2020-07-17T06:25:06-04:00
Remove {-# CORE #-} pragma (part of #18048)

This pragma has no effect since 2011.
It was introduced for External Core, which no longer exists.

Updates haddock submodule.

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cfd5c37a by Simon Peyton Jones at 2020-07-17T06:25:06-04:00
Refactor the simplification of join binders

This MR (for #18449) refactors the Simplifier's treatment
of join-point binders.

Specifically, it puts together, into
     GHC.Core.Opt.Simplify.Env.adjustJoinPointType
two currently-separate ways in which we adjust the type of
a join point. As the comment says:

-- (adjustJoinPointType mult new_res_ty join_id) does two things:
--
--   1. Set the return type of the join_id to new_res_ty
--      See Note [Return type for join points]
--
--   2. Adjust the multiplicity of arrows in join_id's type, as
--      directed by 'mult'. See Note [Scaling join point arguments]

I think this actually fixes a latent bug, by ensuring that the
seIdSubst and seInScope have the right multiplicity on the type
of join points.

I did some tidying up while I was at it.  No more
setJoinResTy, or modifyJoinResTy: instead it's done locally in
Simplify.Env.adjustJoinPointType

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a853f4d2 by Chaitanya Koparkar at 2020-07-17T06:25:07-04:00
Fix minor typos in a Core.hs note

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3bf55ef1 by Stefan Schulze Frielinghaus at 2020-07-17T06:25:08-04:00
GHCi: Fix isLittleEndian

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30 changed files:

- compiler/GHC/Core.hs
- compiler/GHC/Core/Lint.hs
- compiler/GHC/Core/Opt/Simplify.hs
- compiler/GHC/Core/Opt/Simplify/Env.hs
- compiler/GHC/Core/TyCo/Rep.hs
- compiler/GHC/Core/Type.hs
- compiler/GHC/Core/UsageEnv.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/HsToCore/Binds.hs
- compiler/GHC/HsToCore/Expr.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Lexer.x
- compiler/GHC/Rename/Expr.hs
- compiler/GHC/Tc/Gen/Expr.hs
- compiler/GHC/Tc/Gen/Match.hs
- compiler/GHC/Tc/Gen/Pat.hs
- compiler/GHC/Tc/Gen/Sig.hs
- compiler/GHC/Tc/Instance/Class.hs
- compiler/GHC/Tc/Instance/Family.hs
- compiler/GHC/Tc/TyCl/Class.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Utils/Env.hs
- compiler/GHC/Tc/Utils/Instantiate.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/Tc/Utils/TcType.hs
- compiler/GHC/Tc/Utils/Unify.hs
- docs/users_guide/phases.rst
- docs/users_guide/runtime_control.rst
- hadrian/hadrian.cabal


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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/503523bdf2a7f72032726513e927166fd79b939a...3bf55ef1d2ee6503eb1238dc2051ae7b55afca69

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