[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 10 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:
6c1e71d3 by Ben Gamari at 2020-07-18T01:36:19-04:00
rts: Add --copying-gc flag to reverse effect of --nonmoving-gc

Fixes #18281.

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e7e00aec by Hécate at 2020-07-18T01:36:20-04:00
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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312ad8dd by Hécate at 2020-07-18T01:36:21-04:00
Add a Lint hadrian rule and an .hlint.yaml file in base/

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25fb646c by Simon Peyton Jones at 2020-07-18T01:36:22-04:00
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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ae885c1d by Simon Peyton Jones at 2020-07-18T01:36:22-04:00
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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af6b210f by Krzysztof Gogolewski at 2020-07-18T01:36:24-04:00
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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6e114004 by Simon Peyton Jones at 2020-07-18T01:36:24-04:00
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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d920047d by Chaitanya Koparkar at 2020-07-18T01:36:25-04:00
Fix minor typos in a Core.hs note

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3344723e by Stefan Schulze Frielinghaus at 2020-07-18T01:36:26-04:00
GHCi: Fix isLittleEndian

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40fa252a by Ben Gamari at 2020-07-18T01:36:27-04:00
testsuite: Mark ghci tests as fragile under unreg compiler

In particular I have seen T16012 fail repeatedly under the
unregisterised compiler.

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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/09b1e854e27ea8f6b602112686eadc8bf0a1429f...40fa252a38115c67e9b462d07022d2329e8dcc6f

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