[Git][ghc/ghc][wip/global-local-mismatch-info] 42 commits: [hadrian] Fix multiline synopsis rendering

Ben Price (@brprice) gitlab at gitlab.haskell.org
Mon Jun 12 11:41:01 UTC 2023



Ben Price pushed to branch wip/global-local-mismatch-info at Glasgow Haskell Compiler / GHC


Commits:
f7744e8e by Andrey Mokhov at 2023-06-03T16:49:44-04:00
[hadrian] Fix multiline synopsis rendering

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b2c745db by Bodigrim at 2023-06-03T16:50:23-04:00
Elaborate on performance properties of Data.List.++

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7cd8a61e by Matthew Pickering at 2023-06-05T11:46:23+01:00
Big TcLclEnv and CtLoc refactoring

The overall goal of this refactoring is to reduce the dependency
footprint of the parser and syntax tree. Good reasons include:

- Better module graph parallelisability
- Make it easier to migrate error messages without introducing module loops
- Philosophically, there's not reason for the AST to depend on half the
  compiler.

One of the key edges which added this dependency was

> GHC.Hs.Expr -> GHC.Tc.Types (TcLclEnv)

As this in turn depending on TcM which depends on HscEnv and so on.

Therefore the goal of this patch is to move `TcLclEnv` out of
`GHC.Tc.Types` so that `GHC.Hs.Expr` can import TcLclEnv without
incurring a huge dependency chain.

The changes in this patch are:

* Move TcLclEnv from GHC.Tc.Types to GHC.Tc.Types.LclEnv
* Create new smaller modules for the types used in TcLclEnv
  New Modules:
  - GHC.Tc.Types.ErrCtxt
  - GHC.Tc.Types.BasicTypes
  - GHC.Tc.Types.TH
  - GHC.Tc.Types.LclEnv
  - GHC.Tc.Types.CtLocEnv
  - GHC.Tc.Errors.Types.PromotionErr

  Removed Boot File:
  - {-# SOURCE #-} GHC.Tc.Types

* Introduce TcLclCtxt, the part of the TcLclEnv which doesn't
  participate in restoreLclEnv.

* Replace TcLclEnv in CtLoc with specific CtLocEnv which is defined in
  GHC.Tc.Types.CtLocEnv. Use CtLocEnv in Implic and CtLoc to record the
  location of the implication and constraint.

By splitting up TcLclEnv from GHC.Tc.Types we allow GHC.Hs.Expr to no
longer depend on the TcM monad and all that entails.

Fixes #23389 #23409

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3d8d39d1 by Matthew Pickering at 2023-06-05T11:46:23+01:00
Remove dependency of GHC.Tc.Utils.TcType on GHC.Driver.Session

This removes the usage of DynFlags from Tc.Utils.TcType  so that it no
longer depends on GHC.Driver.Session. In general we don't want anything
which is a dependency of Language.Haskell.Syntax to depend on
GHC.Driver.Session and removing this edge gets us closer to that goal.

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18db5ada by Matthew Pickering at 2023-06-05T11:46:23+01:00
Move isIrrefutableHsPat to GHC.Rename.Utils and rename to isIrrefutableHsPatRn

This removes edge from GHC.Hs.Pat to GHC.Driver.Session, which makes
Language.Haskell.Syntax end up depending on GHC.Driver.Session.

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12919dd5 by Matthew Pickering at 2023-06-05T11:46:23+01:00
Remove dependency of GHC.Tc.Types.Constraint on GHC.Driver.Session

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eb852371 by Matthew Pickering at 2023-06-05T11:46:24+01:00
hole fit plugins: Split definition into own module

The hole fit plugins are defined in terms of TcM, a type we want to
avoid depending on from `GHC.Tc.Errors.Types`. By moving it into its own
module we can remove this dependency. It also simplifies the necessary
boot file.

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9e5246d7 by Matthew Pickering at 2023-06-05T11:46:24+01:00
Move GHC.Core.Opt.CallerCC Types into separate module

This allows `GHC.Driver.DynFlags` to depend on these types without
depending on CoreM and hence the entire simplifier pipeline.

We can also remove a hs-boot file with this change.

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52d6a7d7 by Matthew Pickering at 2023-06-05T11:46:24+01:00
Remove unecessary SOURCE import

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698d160c by Matthew Pickering at 2023-06-05T11:46:24+01:00
testsuite: Accept new output for CountDepsAst and CountDepsParser tests

These are in a separate commit as the improvement to these tests is the
cumulative effect of the previous set of patches rather than just the
responsibility of the last one in the patchset.

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58ccf02e by sheaf at 2023-06-05T16:00:47-04:00
TTG: only allow VarBind at GhcTc

The VarBind constructor of HsBind is only used at the GhcTc stage.
This commit makes that explicit by setting the extension field of
VarBind to be DataConCantHappen at all other stages.

This allows us to delete a dead code path in GHC.HsToCore.Quote.rep_bind,
and remove some panics.

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54b83253 by Matthew Craven at 2023-06-06T12:59:25-04:00
Generate Addr# access ops programmatically

The existing utils/genprimopcode/gen_bytearray_ops.py was
relocated and extended for this purpose.  Additionally, hadrian
now knows about this script and uses it when generating primops.txt

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ecadbc7e by Matthew Pickering at 2023-06-06T13:00:01-04:00
ghcup-metadata: Only add Nightly tag when replacing LatestNightly

Previously we were always adding the Nightly tag, but this led to all
the previous builds getting an increasing number of nightly tags over
time. Now we just add it once, when we remove the LatestNightly tag.

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4aea0a72 by Vladislav Zavialov at 2023-06-07T12:06:46+02:00
Invisible binders in type declarations (#22560)

This patch implements @k-binders introduced in GHC Proposal #425
and guarded behind the TypeAbstractions extension:

	type D :: forall k j. k -> j -> Type
	data D @k @j a b = ...
	       ^^ ^^

To represent the new syntax, we modify LHsQTyVars as follows:

	-  hsq_explicit :: [LHsTyVarBndr () pass]
	+  hsq_explicit :: [LHsTyVarBndr (HsBndrVis pass) pass]

HsBndrVis is a new data type that records the distinction between
type variable binders written with and without the @ sign:

	data HsBndrVis pass
	  = HsBndrRequired
	  | HsBndrInvisible (LHsToken "@" pass)

The rest of the patch updates GHC, template-haskell, and haddock
to handle the new syntax.

Parser:
  The PsErrUnexpectedTypeAppInDecl error message is removed.
  The syntax it used to reject is now permitted.

Renamer:
  The @ sign does not affect the scope of a binder, so the changes to
  the renamer are minimal.  See rnLHsTyVarBndrVisFlag.

Type checker:
  There are three code paths that were updated to deal with the newly
  introduced invisible type variable binders:

    1. checking SAKS: see kcCheckDeclHeader_sig, matchUpSigWithDecl
    2. checking CUSK: see kcCheckDeclHeader_cusk
    3. inference: see kcInferDeclHeader, rejectInvisibleBinders

  Helper functions bindExplicitTKBndrs_Q_Skol and bindExplicitTKBndrs_Q_Tv
  are generalized to work with HsBndrVis.

Updates the haddock submodule.

Metric Increase:
    MultiLayerModulesTH_OneShot

Co-authored-by: Simon Peyton Jones <simon.peytonjones at gmail.com>

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b7600997 by Josh Meredith at 2023-06-07T13:10:21-04:00
JS: clean up FFI 'fat arrow' calls in base:System.Posix.Internals (#23481)

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e5d3940d by Sebastian Graf at 2023-06-07T18:01:28-04:00
Update CODEOWNERS
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960ef111 by Matthew Pickering at 2023-06-07T18:02:04-04:00
Revert "Remove IPE enabled builds from CI"

This reverts commit 41b41577c8a28c236fa37e8f73aa1c6dc368d951.

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bad1c8cc by Matthew Pickering at 2023-06-07T18:02:04-04:00
Revert "Update user's guide and release notes, small fixes"

This reverts commit 3ded9a1cd22f9083f31bc2f37ee1b37f9d25dab7.

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12726d90 by Matthew Pickering at 2023-06-07T18:02:04-04:00
Revert "Add IPE-enabled builds to CI"

This reverts commit 09d93bd0305b0f73422ce7edb67168c71d32c15f.

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dbdd989d by Matthew Pickering at 2023-06-07T18:02:04-04:00
Revert "Add optional dependencies to ./configure output"

This reverts commit a00488665cd890a26a5564a64ba23ff12c9bec58.

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240483af by Matthew Pickering at 2023-06-07T18:02:04-04:00
Revert "Fix IPE data decompression buffer allocation"

This reverts commit 0e85099b9316ee24565084d5586bb7290669b43a.

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9b8c7dd8 by Matthew Pickering at 2023-06-07T18:02:04-04:00
Revert "Fix byte order of IPE data, fix IPE tests"

This reverts commit 7872e2b6f08ea40d19a251c4822a384d0b397327.

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3364379b by Matthew Pickering at 2023-06-07T18:02:04-04:00
Revert "Add note describing IPE data compression"

This reverts commit 69563c97396b8fde91678fae7d2feafb7ab9a8b0.

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fda30670 by Matthew Pickering at 2023-06-07T18:02:04-04:00
Revert "Fix libzstd detection in configure and RTS"

This reverts commit 5aef5658ad5fb96bac7719710e0ea008bf7b62e0.

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1cbcda9a by Matthew Pickering at 2023-06-07T18:02:04-04:00
Revert "IPE data compression"

This reverts commit b7a640acf7adc2880e5600d69bcf2918fee85553.

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fb5e99aa by Matthew Pickering at 2023-06-07T18:02:04-04:00
Revert "Add IPE compression to configure"

This reverts commit 5d1f2411f4becea8650d12d168e989241edee186.

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2cdcb3a5 by Matthew Pickering at 2023-06-07T18:02:04-04:00
Revert "Restructure IPE buffer layout"

This reverts commit f3556d6cefd3d923b36bfcda0c8185abb1d11a91.

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2b0c9f5e by Simon Peyton Jones at 2023-06-08T07:52:34+00:00
Don't report redundant Givens from quantified constraints

This fixes #23323

See (RC4) in Note [Tracking redundant constraints]

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567b32e1 by David Binder at 2023-06-08T18:41:29-04:00
Update the outdated instructions in HACKING.md on how to compile GHC

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2b1a4abe by Ryan Scott at 2023-06-09T07:56:58-04:00
Restore mingwex dependency on Windows

This partially reverts some of the changes in !9475 to make `base` and
`ghc-prim` depend on the `mingwex` library on Windows. It also restores the
RTS's stubs for `mingwex`-specific symbols such as `_lock_file`.

This is done because the C runtime provides `libmingwex` nowadays, and
moreoever, not linking against `mingwex` requires downstream users to link
against it explicitly in difficult-to-predict circumstances. Better to always
link against `mingwex` and prevent users from having to do the guesswork
themselves.

See https://gitlab.haskell.org/ghc/ghc/-/merge_requests/10360#note_495873 for
the discussion that led to this.

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28954758 by Ryan Scott at 2023-06-09T07:56:58-04:00
RtsSymbols.c: Remove mingwex symbol stubs

As of !9475, the RTS now links against `ucrt` instead of `msvcrt` on Windows,
which means that the RTS no longer needs to declare stubs for the `__mingw_*`
family of symbols. Let's remove these stubs to avoid confusion.

Fixes #23309.

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3ab0155b by Ryan Scott at 2023-06-09T07:57:35-04:00
Consistently use validity checks for TH conversion of data constructors

We were checking that TH-spliced data declarations do not look like this:

```hs
data D :: Type = MkD Int
```

But we were only doing so for `data` declarations' data constructors, not for
`newtype`s, `data instance`s, or `newtype instance`s. This patch factors out
the necessary validity checks into its own `cvtDataDefnCons` function and uses
it in all of the places where it needs to be.

Fixes #22559.

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a24b83dd by Matthew Pickering at 2023-06-09T15:19:00-04:00
Fix behaviour of -keep-tmp-files when used in OPTIONS_GHC pragma

This fixes the behaviour of -keep-tmp-files when used in an OPTIONS_GHC
pragma for files with module level scope.

Instead of simple not deleting the files, we also need to remove them
from the TmpFs so they are not deleted later on when all the other files
are deleted.

There are additional complications because you also need to remove the
directory where these files live from the TmpFs so we don't try to
delete those later either.

I added two tests.

1. Tests simply that -keep-tmp-files works at all with a single module
   and --make mode.
2. The other tests that temporary files are deleted for other modules
   which don't enable -keep-tmp-files.

Fixes #23339

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dcf32882 by Matthew Pickering at 2023-06-09T15:19:00-04:00
withDeferredDiagnostics: When debugIsOn, write landmine into IORef to catch use-after-free.

Ticket #23305 reports an error where we were attempting to use the
logger which was created by withDeferredDiagnostics after its scope had
ended.

This problem would have been caught by this patch and a validate build:

```
+*** Exception: Use after free
+CallStack (from HasCallStack):
+  error, called at compiler/GHC/Driver/Make.hs:<line>:<column> in <package-id>:GHC.Driver.Make
```

This general issue is tracked by #20981

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432c736c by Matthew Pickering at 2023-06-09T15:19:00-04:00
Don't return complete HscEnv from upsweep

By returning a complete HscEnv from upsweep the logger (as introduced by
withDeferredDiagnostics) was escaping the scope of
withDeferredDiagnostics and hence we were losing error messages.

This is reminiscent of #20981, which also talks about writing errors
into messages after their scope has ended.

See #23305 for details.

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26013cdc by Alexander McKenna at 2023-06-09T15:19:41-04:00
Dump `SpecConstr` specialisations separately

Introduce a `-ddump-spec-constr` flag which debugs specialisations from
`SpecConstr`. These are no longer shown when you use `-ddump-spec`.

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4639100b by Matthew Pickering at 2023-06-09T18:50:43-04:00
Add role annotations to SNat, SSymbol and SChar

Ticket #23454 explained it was possible to implement unsafeCoerce
because SNat was lacking a role annotation.

As these are supposed to be singleton types but backed by an efficient
representation the correct annotation is nominal to ensure these kinds
of coerces are forbidden.

These annotations were missed from https://github.com/haskell/core-libraries-committee/issues/85
which was implemented in 532de36870ed9e880d5f146a478453701e9db25d.

CLC Proposal: https://github.com/haskell/core-libraries-committee/issues/170

Fixes #23454

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9c0dcff7 by Matthew Pickering at 2023-06-09T18:51:19-04:00
Remove non-existant bytearray-ops.txt.pp file from ghc.cabal.in

This broke the sdist generation.

Fixes #23489

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273ff0c7 by David Binder at 2023-06-09T18:52:00-04:00
Regression test T13438 is no longer marked as "expect_broken" in the testsuite driver.

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b84a2900 by Andrei Borzenkov at 2023-06-10T08:27:28-04:00
Fix -Wterm-variable-capture scope (#23434)

-Wterm-variable-capture wasn't accordant with type variable
scoping in associated types, in type classes. For example,
this code produced the warning:
  k = 12

  class C k a where
    type AT a :: k -> Type

I solved this issue by reusing machinery of newTyVarNameRn function
that is accordand with associated types: it does lookup for each free type
variable when we are in the type class context. And in this patch I
use result of this work to make sure that -Wterm-variable-capture warns
only on implicitly quantified type variables.

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9d1a8d87 by Jorge Mendes at 2023-06-10T08:28:10-04:00
Remove redundant case statement in rts/js/mem.js.
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0b6c1bf0 by Ben Price at 2023-06-12T12:40:46+01:00
Lint: more details on "Occurrence is GlobalId, but binding is LocalId"

This is helpful when debugging a pass which accidentally shadowed a
binder.

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30 changed files:

- .gitlab/gen_ci.hs
- .gitlab/jobs.yaml
- .gitlab/rel_eng/mk-ghcup-metadata/mk_ghcup_metadata.py
- CODEOWNERS
- HACKING.md
- compiler/GHC/Builtin/Names/TH.hs
- − compiler/GHC/Builtin/bytearray-ops.txt.pp
- utils/genprimopcode/gen_bytearray_ops.py → compiler/GHC/Builtin/gen_bytearray_addr_access_ops.py
- compiler/GHC/Builtin/primops.txt.pp
- compiler/GHC/Core/Lint.hs
- compiler/GHC/Core/Opt/CallerCC.hs
- − compiler/GHC/Core/Opt/CallerCC.hs-boot
- + compiler/GHC/Core/Opt/CallerCC/Types.hs
- compiler/GHC/Core/TyCon.hs
- compiler/GHC/Driver/Config/Core/Lint.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/Plugins.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Binds.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/Instances.hs
- compiler/GHC/Hs/Pat.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/Hs/Utils.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/Iface/Errors/Types.hs
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Errors/Types.hs


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/71fb460b5927d4fcec9509f949f41b51a4d6a0bb...0b6c1bf053a0c53fb25d5699e07754c85a470405

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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/71fb460b5927d4fcec9509f949f41b51a4d6a0bb...0b6c1bf053a0c53fb25d5699e07754c85a470405
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