[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 9 commits: Optimize NthCo (FunCo ...) in coercion opt

[Marge Bot]

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


Commits:
583a2070 by Richard Eisenberg at 2020-09-29T00:31:27-04:00
Optimize NthCo (FunCo ...) in coercion opt

We were missing this case previously.

Close #18528.

Metric Decrease:
    T18223
    T5321Fun

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b31a3360 by Krzysztof Gogolewski at 2020-09-29T00:32:05-04:00
Linear types: fix kind inference when checking datacons

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5830a12c by Vladislav Zavialov at 2020-09-29T00:32:05-04:00
New linear types syntax: a %p -> b (#18459)

Implements GHC Proposal #356

Updates the haddock submodule.

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bca4d36d by Vladislav Zavialov at 2020-09-29T00:32:05-04:00
Improve error messages for (a %m) without LinearTypes

Detect when the user forgets to enable the LinearTypes
extension and produce a better error message.

Steals the (a %m) syntax from TypeOperators, the workaround
is to write (a % m) instead.

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b9635d0a by Benjamin Maurer at 2020-09-29T00:32:43-04:00
Description of flag `-H` was in 'verbosity options', moved to 'misc'.
Fixes #18699

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74c797f6 by Benjamin Maurer at 2020-09-29T00:33:20-04:00
Workaround for #18623: GHC crashes bc. under rlimit for vmem it will reserve
_all_ of it, leaving nothing for, e.g., thread stacks.
Fix will only allocate 2/3rds and check whether remainder is at least large
enough for minimum amount of thread stacks.

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4365d77a by Ryan Scott at 2020-09-29T00:33:57-04:00
Add regression test #18501

ghc/ghc!3220 ended up fixing #18501. This patch adds a regression
test for #18501 to ensure that it stays fixed.

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7c208390 by Sebastian Graf at 2020-09-29T13:07:19-04:00
PmCheck: Long-distance information for LocalBinds (#18626)

Now `desugarLocalBind` (formerly `desugarLet`) reasons about

  * `FunBind`s that
    * Have no pattern matches (so which aren't functions)
    * Have a singleton match group with a single GRHS
    * (which may have guards)
  * and looks through trivial post-typechecking `AbsBinds` in doing so
    to pick up the introduced renamings.

And desugars to `PmLet` LYG-style guards. Since GRHSs are no longer
denoted simply by `NonEmpty PmGRHS`, but also need to carry a `[PmGrd]`
for the `PmLet`s from `LocalBind`s, I added `PmGRHSs` to capture that.

Since we call out to the desugarer more often, I found that there were
superfluous warnings emitted when desugaring e.g. case expressions.
Thus, I made sure that we deactivate any warnings in the LYG desugaring
steps by the new wrapper function `noCheckDs`.

There's a regression test in `T18626`. Fixes #18626.

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e38a5992 by Richard Eisenberg at 2020-09-29T13:07:19-04:00
Omit redundant kind equality check in solver

See updated Note [Use loose types in inert set] in
GHC.Tc.Solver.Monad.

Close #18753.

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30 changed files:

- compiler/GHC/Builtin/Types/Prim.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/Coercion/Opt.hs
- compiler/GHC/Core/DataCon.hs
- compiler/GHC/Core/Multiplicity.hs
- compiler/GHC/Core/Opt/Arity.hs
- compiler/GHC/Core/Opt/Monad.hs
- compiler/GHC/Core/Opt/Simplify.hs
- compiler/GHC/Core/Opt/Simplify/Env.hs
- compiler/GHC/Core/SimpleOpt.hs
- compiler/GHC/Hs/Decls.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/HsToCore/Pmc.hs
- compiler/GHC/HsToCore/Pmc/Check.hs
- compiler/GHC/HsToCore/Pmc/Desugar.hs
- compiler/GHC/HsToCore/Pmc/Types.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Annotation.hs
- compiler/GHC/Parser/Lexer.x
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Tc/Solver/Monad.hs
- compiler/GHC/Tc/TyCl.hs
- compiler/GHC/Types/Id/Make.hs
- compiler/GHC/Utils/Outputable.hs
- docs/users_guide/9.0.1-notes.rst
- docs/users_guide/exts/linear_types.rst
- docs/users_guide/using.rst
- libraries/base/Data/Typeable/Internal.hs
- libraries/template-haskell/Language/Haskell/TH/Ppr.hs
- rts/posix/OSMem.c


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/1eb75e11d9604218c84a5ba342c3023511c58ff3...e38a599220c11566b9efa043b0d4b60f5eb1d30b

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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/1eb75e11d9604218c84a5ba342c3023511c58ff3...e38a599220c11566b9efa043b0d4b60f5eb1d30b
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