[Git][ghc/ghc][wip/three-way-merge-sort] 183 commits: Add @since annotation to Data.Data.mkConstrTag

Jade (@Jade) gitlab at gitlab.haskell.org
Fri Mar 29 23:19:01 UTC 2024



Jade pushed to branch wip/three-way-merge-sort at Glasgow Haskell Compiler / GHC


Commits:
249caf0d by Matthew Craven at 2024-02-19T20:36:09-05:00
Add @since annotation to Data.Data.mkConstrTag

- - - - -
cdd939e7 by Jade at 2024-02-19T20:36:46-05:00
Enhance documentation of Data.Complex

- - - - -
d04f384f by Ben Gamari at 2024-02-21T04:59:23-05:00
hadrian/bindist: Ensure that phony rules are marked as such

Otherwise make may not run the rule if file with the same name as the
rule happens to exist.

- - - - -
efcbad2d by Ben Gamari at 2024-02-21T04:59:23-05:00
hadrian: Generate HSC2HS_EXTRAS variable in bindist installation

We must generate the hsc2hs wrapper at bindist installation time since
it must contain `--lflag` and `--cflag` arguments which depend upon the
installation path.

The solution here is to substitute these variables in the configure
script (see mk/hsc2hs.in). This is then copied over a dummy wrapper in
the install rules.

Fixes #24050.

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c540559c by Matthew Pickering at 2024-02-21T04:59:23-05:00
ci: Show --info for installed compiler

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ab9281a2 by Matthew Pickering at 2024-02-21T04:59:23-05:00
configure: Correctly set --target flag for linker opts

Previously we were trying to use the FP_CC_SUPPORTS_TARGET with 4
arguments, when it only takes 3 arguments. Instead we need to use the
`FP_PROG_CC_LINKER_TARGET` function in order to set the linker flags.

Actually fixes #24414

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9460d504 by Rodrigo Mesquita at 2024-02-21T04:59:59-05:00
configure: Do not override existing linker flags in FP_LD_NO_FIXUP_CHAINS

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77629e76 by Andrei Borzenkov at 2024-02-21T05:00:35-05:00
Namespacing for fixity signatures (#14032)

Namespace specifiers were added to syntax of fixity signatures:
  - sigdecl ::= infix prec ops | ...
  + sigdecl ::= infix prec namespace_spec ops | ...

To preserve namespace during renaming MiniFixityEnv type
now has separate FastStringEnv fields for names that should be
on the term level and for name that should be on the type level.

makeMiniFixityEnv function was changed to fill MiniFixityEnv in the right way:
 - signatures without namespace specifiers fill both fields
 - signatures with 'data' specifier fill data field only
 - signatures with 'type' specifier fill type field only

Was added helper function lookupMiniFixityEnv that takes care about
looking for a name in an appropriate namespace.

Updates haddock submodule.

Metric Decrease:
    MultiLayerModulesTH_OneShot

- - - - -
84357d11 by Teo Camarasu at 2024-02-21T05:01:11-05:00
rts: only collect live words in nonmoving census when non-concurrent

This avoids segfaults when the mutator modifies closures as we examine
them.

Resolves #24393

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9ca56dd3 by Ian-Woo Kim at 2024-02-21T05:01:53-05:00
mutex wrap in refreshProfilingCCSs

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1387966a by Cheng Shao at 2024-02-21T05:02:32-05:00
rts: remove unused HAVE_C11_ATOMICS macro

This commit removes the unused HAVE_C11_ATOMICS macro. We used to have
a few places that have fallback paths when HAVE_C11_ATOMICS is not
defined, but that is completely redundant, since the
FP_CC_SUPPORTS__ATOMICS configure check will fail when the C compiler
doesn't support C11 style atomics. There are also many places (e.g. in
unreg backend, SMP.h, library cbits, etc) where we unconditionally use
C11 style atomics anyway which work in even CentOS 7 (gcc 4.8), the
oldest distro we test in our CI, so there's no value in keeping
HAVE_C11_ATOMICS.

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0f40d68f by Andreas Klebinger at 2024-02-21T05:03:09-05:00
RTS: -Ds - make sure incall is non-zero before dereferencing it.

Fixes #24445

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e5886de5 by Ben Gamari at 2024-02-21T05:03:44-05:00
rts/AdjustorPool: Use ExecPage abstraction

This is just a minor cleanup I found while reviewing the implementation.

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09941666 by Adam Gundry at 2024-02-21T13:53:12+00:00
Define GHC2024 language edition (#24320)

See https://github.com/ghc-proposals/ghc-proposals/pull/613. Also
fixes #24343 and improves the documentation of language editions.

Co-authored-by: Joachim Breitner <mail at joachim-breitner.de>

- - - - -
5121a4ed by Ben Gamari at 2024-02-23T06:40:55-05:00
Allow docstrings after exports

Here we extend the parser and AST to preserve docstrings following
export items. We then extend Haddock to parse `@since` annotations in
such docstrings, allowing changes in export structure to be properly
documented.

Bumps haddock submodule.

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0eb2265d by Hécate Moonlight at 2024-02-24T16:02:16-05:00
Improve the synopsis and description of base

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2e36f5d2 by Jade at 2024-02-24T16:02:51-05:00
Error Messages: Properly align cyclic module error

Fixes: #24476

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bbfb051c by Ben Gamari at 2024-02-24T19:10:23-05:00
Allow docstrings after exports

Here we extend the parser and AST to preserve docstrings following
export items. We then extend Haddock to parse `@since` annotations in
such docstrings, allowing changes in export structure to be properly
documented.

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d8d6ad8c by Ben Gamari at 2024-02-24T19:10:23-05:00
ghc-internal: Move modules into GHC.Internal.* namespace

Bumps haddock submodule due to testsuite output changes.

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a82af7cd by Ben Gamari at 2024-02-24T19:10:23-05:00
ghc-internal: Rewrite `@since ` to `@since base-`

These will be incrementally moved to the export sites in `base` where
possible.

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ca3836e1 by Ben Gamari at 2024-02-24T19:10:23-05:00
base: Migrate Haddock `not-home` pragmas from `ghc-internal`

This ensures that we do not use `base` stub modules as declarations'
homes when not appropriate.

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c8cf3e26 by Ben Gamari at 2024-02-24T19:10:23-05:00
base: Partially freeze exports of GHC.Base

Sadly there are still a few module reexports. However, at least we have
decoupled from the exports of `GHC.Internal.Base`.

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272573c6 by Ben Gamari at 2024-02-24T19:10:23-05:00
Move Haddock named chunks

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2d8a881d by Ben Gamari at 2024-02-24T19:10:23-05:00
Drop GHC.Internal.Data.Int

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55c4c385 by Ben Gamari at 2024-02-24T19:10:23-05:00
compiler: Fix mention to `GHC....` modules in wasm desugaring

Really, these references should be via known-key names anyways. I have
fixed the proximate issue here but have opened #24472 to track the
additional needed refactoring.

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64150911 by Ben Gamari at 2024-02-24T19:10:23-05:00
Accept performance shifts from ghc-internal restructure

As expected, Haddock now does more work. Less expected is that some
other testcases actually get faster, presumably due to less interface
file loading. As well, the size_hello_artifact test regressed a bit when
debug information is enabled due to debug information for the new stub
symbols.

Metric Decrease:
    T12227
    T13056
Metric Increase:
    haddock.Cabal
    haddock.base
    MultiLayerModulesTH_OneShot
    size_hello_artifact

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317a915b by Ben Gamari at 2024-02-24T19:10:23-05:00
Expose GHC.Wasm.Prim from ghc-experimental

Previously this was only exposed from `ghc-internal` which violates our
agreement that users shall not rely on things exposed from that package.

Fixes #24479.

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3bbd2bf2 by Ben Gamari at 2024-02-24T19:10:23-05:00
compiler/tc: Small optimisation of evCallStack

Don't lookupIds unless we actually need them.

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3e5c9e3c by Ben Gamari at 2024-02-24T19:10:23-05:00
compiler/tc: Use toException instead of SomeException

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125714a6 by Ben Gamari at 2024-02-24T19:10:23-05:00
base: Factor out errorBelch

This was useful when debugging

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3d6aae7c by Ben Gamari at 2024-02-24T19:10:23-05:00
base: Clean up imports of GHC.Stack.CloneStack

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6900306e by Ben Gamari at 2024-02-24T19:10:24-05:00
base: Move PrimMVar to GHC.Internal.MVar

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28f8a148 by Ben Gamari at 2024-02-24T19:10:24-05:00
base: Move prettyCallStack to GHC.Internal.Stack

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4892de47 by Ben Gamari at 2024-02-24T19:10:24-05:00
base: Explicit dependency to workaround #24436

Currently `ghc -M` fails to account for `.hs-boot` files correctly,
leading to issues with cross-package one-shot builds failing. This
currently manifests in `GHC.Exception` due to the boot file for
`GHC.Internal.Stack`. Work around this by adding an explicit `import`,
ensuring that `GHC.Internal.Stack` is built before `GHC.Exception`.

See #24436.

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294c93a5 by Ben Gamari at 2024-02-24T19:10:24-05:00
base: Use displayException in top-level exception handler

Happily this also allows us to eliminate a special case for Deadlock
exceptions.

Implements [CLC #198](https://github.com/haskell/core-libraries-committee/issues/198).

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cf756a25 by Ben Gamari at 2024-02-24T22:11:53-05:00
rts: Fix symbol references in Wasm RTS

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4e4d47a0 by Jade at 2024-02-26T15:17:20-05:00
GHCi: Improve response to unloading, loading and reloading modules

Fixes #13869

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f3de8a3c by Zubin Duggal at 2024-02-26T15:17:57-05:00
rel-eng/fetch-gitlab.py: Fix name of aarch64 alpine 3_18 release job

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c71bfdff by Cheng Shao at 2024-02-26T15:18:35-05:00
hadrian/hie-bios: pass -j to hadrian

This commit passes -j to hadrian in the hadrian/hie-bios scripts. When
the user starts HLS in a fresh clone that has just been configured, it
takes quite a while for hie-bios to pick up the ghc flags and start
actual indexing, due to the fact that the hadrian build step defaulted
to -j1, so -j speeds things up and improve HLS user experience in GHC.
Also add -j flag to .ghcid to speed up ghcid, and sets the Windows
build root to .hie-bios which also works and unifies with other
platforms, the previous build root _hie-bios was missing from
.gitignore anyway.

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50bfdb46 by Cheng Shao at 2024-02-26T15:18:35-05:00
ci: enable parallelism in hadrian/ghci scripts

This commit enables parallelism when the hadrian/ghci scripts are
called in CI. The time bottleneck is in the hadrian build step, but
previously the build step wasn't parallelized.

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61a78231 by Felix Yan at 2024-02-26T15:19:14-05:00
m4: Correctly detect GCC version

When calling as `cc`, GCC does not outputs lowercased "gcc" at least in 13.2.1 version here.

```
$ cc --version
cc (GCC) 13.2.1 20230801
...
```

This fails the check and outputs the confusing message: `configure: $CC is not gcc; assuming it's a reasonably new C compiler`

This patch makes it check for upper-cased "GCC" too so that it works correctly:

```
checking version of gcc... 13.2.1
```
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001aa539 by Teo Camarasu at 2024-02-27T13:26:46-05:00
Fix formatting in whereFrom docstring

Previously it used markdown syntax rather than Haddock syntax for code quotes

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e8034d15 by Teo Camarasu at 2024-02-27T13:26:46-05:00
Move ClosureType type to ghc-internal

- Use ClosureType for InfoProv.ipDesc.
- Use ClosureType for CloneStack.closureType.
- Now ghc-heap re-exports this type from ghc-internal.

See the accompanying CLC proposal: https://github.com/haskell/core-libraries-committee/issues/210

Resolves #22600

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3da0a551 by Matthew Craven at 2024-02-27T13:27:22-05:00
StgToJS: Simplify ExprInline constructor of ExprResult

Its payload was used only for a small optimization in genAlts,
avoiding a few assignments for programs of this form:

  case NormalDataCon arg1 arg2 of x { NormalDataCon x1 x2 -> ... ; }

But when compiling with optimizations, this sort of code is
generally eliminated by case-of-known-constructor in Core-to-Core.
So it doesn't seem worth tracking and cleaning up again in StgToJS.

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61bc92cc by Cheng Shao at 2024-02-27T16:58:42-05:00
rts: add missing ccs_mutex guard to internal_dlopen

See added comment for details. Closes #24423.

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dd29d3b2 by doyougnu at 2024-02-27T16:59:23-05:00
cg: Remove GHC.Cmm.DataFlow.Collections

In pursuit of #15560 and #17957 and generally removing redundancy.

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d3a050d2 by Cheng Shao at 2024-02-27T17:00:00-05:00
utils: remove unused lndir from tree

Ever since the removal of the make build system, the in tree lndir
hasn't been actually built, so this patch removes it.

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74b24a9b by Teo Camarasu at 2024-02-28T16:32:58+00:00
rts: avoid checking bdescr of value outside of Haskell heap

In nonmovingTidyWeaks we want to check if the key of a weak pointer
lives in the non-moving heap. We do this by checking the flags of the
block the key lives in. But we need to be careful with values that live
outside the Haskell heap, since they will lack a block descriptor and
looking for one may lead to a segfault. In this case we should just
accept that it isn't on the non-moving heap.

Resolves #24492

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b4cae4ec by Simon Peyton Jones at 2024-02-29T02:10:08-05:00
In mkDataConRep, ensure the in-scope set is right

A small change that fixes #24489

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3836a110 by Cheng Shao at 2024-02-29T21:25:45-05:00
testsuite: fix T23540 fragility on 32-bit platforms

T23540 is fragile on 32-bit platforms. The root cause is usage of
`getEvidenceTreesAtPoint`, which internally relies on `Name`'s `Ord`
instance, which is indeterministic. The solution is adding a
deterministic `Ord` instance for `EvidenceInfo` and sorting the
evidence trees before pretty printing. Fixes #24449.

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960c8d47 by Teo Camarasu at 2024-02-29T21:26:20-05:00
Reduce AtomicModifyIORef increment count

This test leads to a lot of contention when N>2 and becomes very slow. Let's reduce the amount of work we do to compensate. Resolves #24490

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2e46c8ad by Matthew Pickering at 2024-03-01T05:48:06-05:00
hadrian: Improve parallelism in binary-dist-dir rule

I noticed that the "docs" target was needed after the libraries and
executables were built. We can improve the parallelism by needing
everything at once so that documentation can be built immediately after
a library is built for example.

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cb6c11fe by Matthew Pickering at 2024-03-01T05:48:07-05:00
ci: Bump windows and freebsd boot compilers to 9.6.4

We have previously bumped the docker images to use 9.6.4, but neglected
to bump the windows images until now.

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30f06996 by Matthew Pickering at 2024-03-01T05:48:07-05:00
ci: darwin: Update to 9.6.2 for boot compiler

9.6.4 is currently broken due to #24050

Also update to use LLVM-15 rather than LLVM-11, which is out of date.

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d9d69e12 by Matthew Pickering at 2024-03-01T05:48:07-05:00
Bump minimum bootstrap version to 9.6

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67ace1c5 by Matthew Pickering at 2024-03-01T05:48:07-05:00
ci: Enable more documentation building

Here we enable documentation building on

1. Darwin: The sphinx toolchain was already installed so we enable html
   and manpages.
2. Rocky8: Full documentation (toolchain already installed)
3. Alpine: Full documetnation (toolchain already installed)
4. Windows: HTML and manpages (toolchain already installed)

Fixes #24465

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39583c39 by Matthew Pickering at 2024-03-01T05:48:42-05:00
ci: Bump ci-images to allow updated aarch64-alpine image with llvm15 and clang15

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d91d00fc by Torsten Schmits at 2024-03-01T15:01:50-05:00
Introduce ListTuplePuns extension

This implements Proposal 0475, introducing the `ListTuplePuns` extension
which is enabled by default.

Disabling this extension makes it invalid to refer to list, tuple and
sum type constructors by using built-in syntax like `[Int]`,
`(Int, Int)`, `(# Int#, Int# #)` or `(# Int | Int #)`.
Instead, this syntax exclusively denotes data constructors for use with
`DataKinds`.
The conventional way of referring to these data constructors by
prefixing them with a single quote (`'(Int, Int)`) is now a parser
error.

Tuple declarations have been moved to `GHC.Tuple.Prim` and the `Solo`
data constructor has been renamed to `MkSolo` (in a previous commit).
Unboxed tuples and sums now have real source declarations in `GHC.Types`.
Unit and solo types for tuples are now called `Unit`, `Unit#`, `Solo`
and `Solo#`.
Constraint tuples now have the unambiguous type constructors `CTuple<n>`
as well as `CUnit` and `CSolo`, defined in `GHC.Classes` like before.

A new parser construct has been added for the unboxed sum data
constructor declarations.

The type families `Tuple`, `Sum#` etc. that were intended to provide
nicer syntax have been omitted from this change set due to inference
problems, to be implemented at a later time.
See the MR discussion for more info.

Updates the submodule utils/haddock.
Updates the cabal submodule due to new language extension.

    Metric Increase:
        haddock.base

    Metric Decrease:
        MultiLayerModulesTH_OneShot
        size_hello_artifact

Proposal document: https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0475-tuple-syntax.rst

Merge request: https://gitlab.haskell.org/ghc/ghc/-/merge_requests/8820

Tracking ticket: https://gitlab.haskell.org/ghc/ghc/-/issues/21294

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bbdb6286 by Sylvain Henry at 2024-03-01T15:01:50-05:00
JS linker: filter unboxed tuples

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dec6d8d3 by Arnaud Spiwack at 2024-03-01T15:02:30-05:00
Improve error messages coming from non-linear patterns

This enriched the `CtOrigin` for non-linear patterns to include data
of the pattern that created the constraint (which can be quite useful
if it occurs nested in a pattern) as well as an explanation why the
pattern is non-restricted in (at least in some cases).

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6612388e by Arnaud Spiwack at 2024-03-01T15:02:30-05:00
Adjust documentation of linear lets according to committee decision

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1c064ef1 by Cheng Shao at 2024-03-02T17:11:19-05:00
compiler: start deprecating cmmToRawCmmHook

cmmToRawCmmHook was added 4 years ago in
d561c8f6244f8280a2483e8753c38e39d34c1f01. Its only user is the
Asterius project, which has been archived and deprecated in favor of
the ghc wasm backend. This patch starts deprecating cmmToRawCmmHook by
placing a DEPRECATED pragma, and actual removal shall happen in a
future GHC major release if no issue to oppose the deprecation has
been raised in the meantime.

- - - - -
9b74845f by Andrew Lelechenko at 2024-03-02T17:11:55-05:00
Data.List.NonEmpty.unzip: use WARNING with category instead of DEPRECATED

CLC proposal: https://github.com/haskell/core-libraries-committee/issues/258

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61bb5ff6 by Finley McIlwaine at 2024-03-04T09:01:40-08:00
add -fprof-late-overloaded and -fprof-late-overloaded-calls

* Refactor late cost centre insertion for extensibility
* Add two more late cost centre insertion methods that add SCCs to overloaded
  top level bindings and call sites with dictionary arguments.
* Some tests for the basic functionality of the new insertion methods

Resolves: #24500

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82ccb801 by Andreas Klebinger at 2024-03-04T19:59:14-05:00
x86-ncg: Fix fma codegen when arguments are globals

Fix a bug in the x86 ncg where results would be wrong when the desired output
register and one of the input registers were the same global.

Also adds a tiny optimization to make use of the memory addressing
support when convenient.

Fixes #24496

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18ad1077 by Matthew Pickering at 2024-03-05T14:22:31-05:00
rel_eng: Update hackage docs upload scripts

This adds the upload of ghc-internal and ghc-experimental to our scripts
which upload packages to hackage.

- - - - -
bf47c9ba by Matthew Pickering at 2024-03-05T14:22:31-05:00
docs: Remove stray module comment from GHC.Profiling.Eras

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37d9b340 by Matthew Pickering at 2024-03-05T14:22:31-05:00
Fix ghc-internal cabal file

The file mentioned some artifacts relating to the base library. I have
renamed these to the new ghc-internal variants.

- - - - -
23f2a478 by Matthew Pickering at 2024-03-05T14:22:31-05:00
Fix haddock source links and hyperlinked source

There were a few issues with the hackage links:

1. We were using the package id rather than the package name for the
   package links. This is fixed by now allowing the template to mention
   %pkg% or %pkgid% and substituing both appropiatly.
2. The `--haddock-base-url` flag is renamed to `--haddock-for-hackage`
   as the new base link works on a local or remote hackage server.
3. The "src" path including too much stuff, so cross-package source
   links were broken as the template was getting double expanded.

Fixes #24086

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2fa336a9 by Ben Gamari at 2024-03-05T14:23:07-05:00
filepath: Bump submodule to 1.5.2.0

- - - - -
31217944 by Ben Gamari at 2024-03-05T14:23:07-05:00
os-string: Bump submodule to 2.0.2

- - - - -
4074a3f2 by Matthew Pickering at 2024-03-05T21:44:35-05:00
base: Reflect new era profiling RTS flags in GHC.RTS.Flags

* -he profiling mode
* -he profiling selector
* --automatic-era-increment

CLC proposal #254 - https://github.com/haskell/core-libraries-committee/issues/254

- - - - -
a8c0e31b by Sylvain Henry at 2024-03-05T21:45:14-05:00
JS: faster implementation for some numeric primitives (#23597)

Use faster implementations for the following primitives in the JS
backend by not using JavaScript's BigInt:
- plusInt64
- minusInt64
- minusWord64
- timesWord64
- timesInt64

Co-authored-by: Josh Meredith <joshmeredith2008 at gmail.com>

- - - - -
21e3f325 by Cheng Shao at 2024-03-05T21:45:52-05:00
rts: add -xr option to control two step allocator reserved space size

This patch adds a -xr RTS option to control the size of virtual memory
address space reserved by the two step allocator on a 64-bit platform,
see added documentation for explanation. Closes #24498.

- - - - -
dedcf102 by Cheng Shao at 2024-03-06T13:39:04-05:00
rts: expose HeapAlloc.h as public header

This commit exposes HeapAlloc.h as a public header. The intention is
to expose HEAP_ALLOCED/HEAP_ALLOCED_GC, so they can be used in
assertions in other public headers, and they may also be useful for
user code.

- - - - -
d19441d7 by Cheng Shao at 2024-03-06T13:39:04-05:00
rts: assert pointer is indeed heap allocated in Bdescr()

This commit adds an assertion to Bdescr() to assert the pointer is
indeed heap allocated. This is useful to rule out RTS bugs that
attempt to access non-existent block descriptor of a static closure, #24492
being one such example.

- - - - -
9a656a04 by Ben Gamari at 2024-03-06T13:39:39-05:00
ghc-experimental: Add dummy dependencies to work around #23942

This is a temporary measure to improve CI reliability until a proper
solution is developed.

Works around #23942.

- - - - -
1e84b924 by Simon Peyton Jones at 2024-03-06T13:39:39-05:00
Three compile perf improvements with deep nesting

These were changes are all triggered by #24471.

1. Make GHC.Core.Opt.SetLevels.lvlMFE behave better when there are
   many free variables.  See Note [Large free-variable sets].

2. Make GHC.Core.Opt.Arity.floatIn a bit lazier in its Cost argument.
   This benefits the common case where the ArityType turns out to
   be nullary. See Note [Care with nested expressions]

3. Make GHC.CoreToStg.Prep.cpeArg behave for deeply-nested
   expressions.  See Note [Eta expansion of arguments in CorePrep]
   wrinkle (EA2).

Compile times go down by up to 4.5%, and much more in artificial
cases. (Geo mean of compiler/perf changes is -0.4%.)

Metric Decrease:
    CoOpt_Read
    T10421
    T12425

- - - - -
c4b13113 by Hécate Moonlight at 2024-03-06T13:40:17-05:00
Use "module" instead of "library" when applicable in base haddocks

- - - - -
9cd9efb4 by Vladislav Zavialov at 2024-03-07T13:01:54+03:00
Rephrase error message to say "visible arguments" (#24318)

* Main change: make the error message generated by mkFunTysMsg more
  accurate by changing "value arguments" to "visible arguments".

* Refactor: define a new type synonym VisArity and use it instead of
  Arity in a few places.

It might be the case that there other places in the compiler that should
talk about visible arguments rather than value arguments, but I haven't
tried to find them all, focusing only on the error message reported in
the ticket.

- - - - -
d523a6a7 by Ben Gamari at 2024-03-07T19:40:45-05:00
Bump array submodule

- - - - -
7e55003c by Ben Gamari at 2024-03-07T19:40:45-05:00
Bump stm submodule

- - - - -
32d337ef by Ben Gamari at 2024-03-07T19:40:45-05:00
Introduce exception context

Here we introduce the `ExceptionContext` type and `ExceptionAnnotation`
class, allowing dynamically-typed user-defined annotations to be
attached to exceptions.

CLC Proposal: https://github.com/haskell/core-libraries-committee/issues/199
GHC Proposal: https://github.com/ghc-proposals/ghc-proposals/pull/330

- - - - -
39f3d922 by Ben Gamari at 2024-03-07T19:40:46-05:00
testsuite/interface-stability: Update documentation

- - - - -
fdea7ada by Ben Gamari at 2024-03-07T19:40:46-05:00
ghc-internal: comment formatting

- - - - -
4fba42ef by Ben Gamari at 2024-03-07T19:40:46-05:00
compiler: Default and warn ExceptionContext constraints

- - - - -
3886a205 by Ben Gamari at 2024-03-07T19:40:46-05:00
base: Introduce exception backtraces

Here we introduce the `Backtraces` type and associated machinery for
attaching these via `ExceptionContext`. These has a few compile-time
regressions (`T15703` and `T9872d`) due to the additional dependencies
in the exception machinery.

As well, there is a surprisingly large regression in the
`size_hello_artifact` test. This appears to be due to various `Integer` and
`Read` bits now being reachable at link-time. I believe it should be
possible to avoid this but I have accepted the change for now to get the
feature merged.

CLC Proposal: https://github.com/haskell/core-libraries-committee/issues/199
GHC Proposal: https://github.com/ghc-proposals/ghc-proposals/pull/330

Metric Increase:
    T15703
    T9872d
    size_hello_artifact

- - - - -
18c5409f by Ben Gamari at 2024-03-07T19:40:46-05:00
users guide: Release notes for exception backtrace work

- - - - -
f849c5fc by Ben Gamari at 2024-03-07T19:40:46-05:00
compiler: Don't show ExceptionContext of GhcExceptions

Most GhcExceptions are user-facing errors and therefore the
ExceptionContext has little value. Ideally we would enable
it in the DEBUG compiler but I am leaving this for future work.

- - - - -
dc646e6f by Sylvain Henry at 2024-03-07T19:40:46-05:00
Disable T9930fail for the JS target (cf #19174)

- - - - -
bfc09760 by Alan Zimmerman at 2024-03-07T19:41:22-05:00
Update showAstData to honour blanking of AnnParen

Also tweak rendering of SrcSpan to remove extra blank line.

- - - - -
50454a29 by Ben Gamari at 2024-03-08T03:32:42-05:00
ghc-internal: Eliminate GHC.Internal.Data.Kind

This was simply reexporting things from `ghc-prim`. Instead reexport
these directly from `Data.Kind`. Also add build ordering dependency to
work around #23942.

- - - - -
38a4b6ab by Ben Gamari at 2024-03-08T03:33:18-05:00
rts: Fix SET_HDR initialization of retainer set

This fixes a regression in retainer set profiling introduced by
b0293f78cb6acf2540389e22bdda420d0ab874da. Prior to that commit
the heap traversal word would be initialized by `SET_HDR` using
`LDV_RECORD_CREATE`. However, the commit added a `doingLDVProfiling`
check in `LDV_RECORD_CREATE`, meaning that this initialization no longer
happened.

Given that this initialization was awkwardly indirectly anyways, I have
fixed this by explicitly initializating the heap traversal word to
`NULL` in `SET_PROF_HDR`. This is equivalent to the previous behavior,
but much more direct.

Fixes #24513.

- - - - -
2859a637 by Ben Gamari at 2024-03-08T18:26:47-05:00
base: Use strerror_r instead of strerror

As noted by #24344, `strerror` is not necessarily thread-safe.
Thankfully, POSIX.1-2001 has long offered `strerror_r`, which is
safe to use.

Fixes #24344.

CLC discussion: https://github.com/haskell/core-libraries-committee/issues/249

- - - - -
edb9bf77 by Jade at 2024-03-09T03:39:38-05:00
Error messages: Improve Error messages for Data constructors in type signatures.

This patch improves the error messages from invalid type signatures by
trying to guess what the user did and suggesting an appropriate fix.

Partially fixes: #17879

- - - - -
cfb197e3 by Patrick at 2024-03-09T03:40:15-05:00
HieAst: add module name #24493

The main purpose of this is to tuck the module name `xxx` in `module xxx where` into the hieAst.
It should fix #24493.

The following have been done:
1. Renamed and update the `tcg_doc_hdr :: Maybe (LHsDoc GhcRn)` to `tcg_hdr_info :: (Maybe (LHsDoc GhcRn), Maybe (XRec GhcRn ModuleName))`
   To store the located module name information.
2. update the `RenamedSource` and `RenamedStuff` with extra `Maybe (XRec GhcRn ModuleName)` located module name information.
3. add test `testsuite/tests/hiefile/should_compile/T24493.hs` to ensure the module name is added and update several relevent tests.
4. accompanied submodule haddoc test update MR in https://gitlab.haskell.org/ghc/haddock/-/merge_requests/53

- - - - -
2341d81e by Vaibhav Sagar at 2024-03-09T03:40:54-05:00
GHC.Utils.Binary: fix a couple of typos

- - - - -
5580e1bd by Ben Gamari at 2024-03-09T03:41:30-05:00
rts: Drop .wasm suffix from .prof file names

This replicates the behavior on Windows, where `Hi.exe` will produce
profiling output named `Hi.prof` instead of `Hi.exe.prof`.

While in the area I also fixed the extension-stripping logic, which
incorrectly rewrote `Hi.exefoo` to `Hi.foo`.

Closes #24515.

- - - - -
259495ee by Cheng Shao at 2024-03-09T03:41:30-05:00
testsuite: drop exe extension from .hp & .prof filenames

See #24515 for details.

- - - - -
c477a8d2 by Ben Gamari at 2024-03-09T03:42:05-05:00
rts/linker: Enable GOT support on all platforms

There is nothing platform-dependent about our GOT implementation and
GOT support is needed by `T24171` on i386.

- - - - -
2e592857 by Vladislav Zavialov at 2024-03-09T03:42:41-05:00
Drop outdated comment on TcRnIllformedTypePattern

This should have been done in 0f0c53a501b but I missed it.

- - - - -
c554b4da by Ben Gamari at 2024-03-09T09:39:20-05:00
rts/CloneStack: Bounds check array write

- - - - -
15c590a5 by Ben Gamari at 2024-03-09T09:39:20-05:00
rts/CloneStack: Don't expose helper functions in header

- - - - -
e831ce31 by Ben Gamari at 2024-03-09T09:39:20-05:00
base: Move internals of GHC.InfoProv into GHC.InfoProv.Types

Such that we can add new helpers into GHC.InfoProv.Types without
breakage.

- - - - -
6948e24d by Ben Gamari at 2024-03-09T09:39:20-05:00
rts: Lazily decode IPE tables

Previously we would eagerly allocate `InfoTableEnt`s for each
info table registered in the info table provenance map. However, this
costs considerable memory and initialization time. Instead we now
lazily decode these tables. This allows us to use one-third the memory
*and* opens the door to taking advantage of sharing opportunities within
a module.

This required considerable reworking since lookupIPE now must be passed
its result buffer.

- - - - -
9204a04e by Ben Gamari at 2024-03-09T09:39:20-05:00
rts/IPE: Don't expose helper in header

- - - - -
308926ff by Ben Gamari at 2024-03-09T09:39:20-05:00
rts/IPE: Share module_name within a Node

This allows us to shave a 64-bit word off of the packed IPE entry size.

- - - - -
bebdea05 by Ben Gamari at 2024-03-09T09:39:20-05:00
IPE: Expose unit ID in InfoTableProv

Here we add the unit ID to the info table provenance structure.

- - - - -
6519c9ad by Ben Gamari at 2024-03-09T09:39:35-05:00
rts: Refactor GHC.Stack.CloneStack.decode

Don't allocate a Ptr constructor per frame.

- - - - -
ed0b69dc by Ben Gamari at 2024-03-09T09:39:35-05:00
base: Do not expose whereFrom# from GHC.Exts

- - - - -
2b1faea9 by Vladislav Zavialov at 2024-03-09T17:38:21-05:00
docs: Update info on TypeAbstractions

* Mention TypeAbstractions in 9.10.1-notes.rst
* Set the status to "Experimental".
* Add a "Since: GHC 9.x" comment to each section.

- - - - -
f8b88918 by Ben Gamari at 2024-03-09T21:21:46-05:00
ci-images: Bump Alpine image to bootstrap with 9.8.2

- - - - -
705e6927 by Ben Gamari at 2024-03-09T21:21:46-05:00
testsuite: Mark T24171 as fragile due to #24512

I will fix this but not in time for 9.10.1-alpha1

- - - - -
c74196e1 by Ben Gamari at 2024-03-09T21:21:46-05:00
testsuite: Mark linker_unload_native as fragile

In particular this fails on platforms without `dlinfo`. I plan to
address this but not before 9.10.1-alpha1.

- - - - -
f4d87f7a by Ben Gamari at 2024-03-09T21:21:46-05:00
configure: Bump version to 9.10

- - - - -
88df9a5f by Ben Gamari at 2024-03-09T21:21:46-05:00
Bump transformers submodule to 0.6.1.1

- - - - -
8176d5e8 by Ben Gamari at 2024-03-09T21:21:46-05:00
testsuite: Increase ulimit for T18623

1 MByte was just too tight and failed intermittently on some platforms
(e.g. CentOS 7). Bumping the limit to 8 MByte should provide sufficient
headroom.

Fixes #23139.

- - - - -
c74b38a3 by Ben Gamari at 2024-03-09T21:21:46-05:00
base: Bump version to 4.20.0.0

- - - - -
b2937fc3 by Ben Gamari at 2024-03-09T21:21:46-05:00
ghc-internal: Set initial version at 9.1001.0

This provides PVP compliance while maintaining a clear correspondence
between GHC releases and `ghc-internal` versions.

- - - - -
4ae7d868 by Ben Gamari at 2024-03-09T21:21:46-05:00
ghc-prim: Bump version to 0.11.0

- - - - -
50798dc6 by Ben Gamari at 2024-03-09T21:21:46-05:00
template-haskell: Bump version to 2.22.0.0

- - - - -
8564f976 by Ben Gamari at 2024-03-09T21:21:46-05:00
base-exports: Accommodate spurious whitespace changes in 32-bit output

It appears that this was

- - - - -
9d4f0e98 by Ben Gamari at 2024-03-09T21:21:46-05:00
users-guide: Move exception backtrace relnotes to 9.10

This was previously mistakenly added to the GHC 9.8 release notes.

- - - - -
145eae60 by Ben Gamari at 2024-03-09T21:21:46-05:00
gitlab/rel_eng: Fix name of Rocky8 artifact

- - - - -
39c2a630 by Ben Gamari at 2024-03-09T21:21:46-05:00
gitlab/rel_eng: Fix path of generate_jobs_metadata

- - - - -
aed034de by Ben Gamari at 2024-03-09T21:21:46-05:00
gitlab/upload: Rework recompression

The old `combine` approach was quite fragile due to use of filename
globbing. Moreover, it didn't parallelize well. This refactoring
makes the goal more obvious, parallelizes better, and is more robust.

- - - - -
dc207d06 by Ben Gamari at 2024-03-10T08:56:08-04:00
configure: Bump GHC version to 9.11

Bumps haddock submodule.

- - - - -
8b2513e8 by Ben Gamari at 2024-03-11T01:20:03-04:00
rts/linker: Don't unload code when profiling is enabled

The heap census may contain references (e.g. `Counter.identity`) to
static data which must be available when the census is reported at the
end of execution.

Fixes #24512.

- - - - -
7810b4c3 by Ben Gamari at 2024-03-11T01:20:03-04:00
rts/linker: Don't unload native objects when dlinfo isn't available

To do so is unsafe as we have no way of identifying references to
symbols provided by the object.

Fixes #24513. Fixes #23993.

- - - - -
0590764c by Ben Gamari at 2024-03-11T01:20:39-04:00
rel_eng/upload: Purge both $rel_name/ and $ver/

This is necessary for prereleases, where GHCup accesses the release via
`$ver/`

- - - - -
b85a4631 by Brandon Chinn at 2024-03-12T19:25:56-04:00
Remove duplicate code normalising slashes

- - - - -
c91946f9 by Brandon Chinn at 2024-03-12T19:25:56-04:00
Simplify regexes with raw strings

- - - - -
1a5f53c6 by Brandon Chinn at 2024-03-12T19:25:57-04:00
Don't normalize backslashes in characters

- - - - -
7ea971d3 by Andrei Borzenkov at 2024-03-12T19:26:32-04:00
Fix compiler crash caused by implicit RHS quantification in type synonyms (#24470)

- - - - -
39f3ac3e by Cheng Shao at 2024-03-12T19:27:11-04:00
Revert "compiler: make genSym use C-based atomic increment on non-JS 32-bit platforms"

This reverts commit 615eb855416ce536e02ed935ecc5a6f25519ae16. It was
originally intended to fix #24449, but it was merely sweeping the bug
under the rug. 3836a110577b5c9343915fd96c1b2c64217e0082 has properly
fixed the fragile test, and we no longer need the C version of genSym.
Furthermore, the C implementation causes trouble when compiling with
clang that targets i386 due to alignment warning and libatomic linking
issue, so it makes sense to revert it.

- - - - -
e6bfb85c by Cheng Shao at 2024-03-12T19:27:11-04:00
compiler: fix out-of-bound memory access of genSym on 32-bit

This commit fixes an unnoticed out-of-bound memory access of genSym on
32-bit. ghc_unique_inc is 32-bit sized/aligned on 32-bit platforms,
but we mistakenly treat it as a Word64 pointer in genSym, and
therefore will accidentally load 2 garbage higher bytes, or with a
small but non-zero chance, overwrite something else in the data
section depends on how the linker places the data segments. This
regression was introduced in !11802 and fixed here.

- - - - -
77171cd1 by Ben Orchard at 2024-03-14T09:00:40-04:00
Note mutability of array and address access primops

Without an understanding of immutable vs. mutable memory, the index
primop family have a potentially non-intuitive type signature:

    indexOffAddr :: Addr# -> Int# -> a
    readOffAddr  :: Addr# -> Int# -> State# d -> (# State# d, a #)

indexOffAddr# might seem like a free generality improvement, which it
certainly is not!

This change adds a brief note on mutability expectations for most
index/read/write access primops.

- - - - -
7da7f8f6 by Alan Zimmerman at 2024-03-14T09:01:15-04:00
EPA: Fix regression discarding comments in contexts

Closes #24533

- - - - -
73be65ab by Fendor at 2024-03-19T01:42:53-04:00
Fix sharing of 'IfaceTyConInfo' during core to iface type translation

During heap analysis, we noticed that during generation of
'mi_extra_decls' we have lots of duplicates for the instances:

* `IfaceTyConInfo NotPromoted IfaceNormalTyCon`
* `IfaceTyConInfo IsPromoted IfaceNormalTyCon`

which should be shared instead of duplicated. This duplication increased
the number of live bytes by around 200MB while loading the agda codebase
into GHCi.

These instances are created during `CoreToIface` translation, in
particular `toIfaceTyCon`.

The generated core looks like:

    toIfaceTyCon
      = \ tc_sjJw ->
          case $wtoIfaceTyCon tc_sjJw of
          { (# ww_sjJz, ww1_sjNL, ww2_sjNM #) ->
          IfaceTyCon ww_sjJz (IfaceTyConInfo ww1_sjNL ww2_sjNM)
          }

whichs removes causes the sharing to work propery.

Adding explicit sharing, with NOINLINE annotations, changes the core to:

    toIfaceTyCon
      = \ tc_sjJq ->
          case $wtoIfaceTyCon tc_sjJq of { (# ww_sjNB, ww1_sjNC #) ->
          IfaceTyCon ww_sjNB ww1_sjNC
          }

which looks much more like sharing is happening.
We confirmed via ghc-debug that all duplications were eliminated and the
number of live bytes are noticeably reduced.

- - - - -
bd8209eb by Alan Zimmerman at 2024-03-19T01:43:28-04:00
EPA: Address more 9.10.1-alpha1 regressions from recent changes

Closes #24533
Hopefully for good this time

- - - - -
31bf85ee by Fendor at 2024-03-19T14:48:08-04:00
Escape multiple arguments in the settings file

Uses responseFile syntax.

The issue arises when GHC is installed on windows into a location that
has a space, for example the user name is 'Fake User'.
The $topdir will also contain a space, consequentially.
When we resolve the top dir in the string `-I$topdir/mingw/include`,
then `words` will turn this single argument into `-I/C/Users/Fake` and
`User/.../mingw/include` which trips up the flag argument parser of
various tools such as gcc or clang.
We avoid this by escaping the $topdir before replacing it in
`initSettngs`.
Additionally, we allow to escape spaces and quotation marks for
arguments in `settings` file.

Add regression test case to count the number of options after variable
expansion and argument escaping took place.
Additionally, we check that escaped spaces and double quotation marks are
correctly parsed.

- - - - -
f45f700e by Matthew Pickering at 2024-03-19T14:48:44-04:00
Read global package database from settings file

Before this patch, the global package database was always assumed to be
in libdir </> package.conf.d.

This causes issues in GHC's build system because there are sometimes
situations where the package database you need to use is not located in
the same place as the settings file.

* The stage1 compiler needs to use stage1 libraries, so we should set
  "Global Package DB" for the stage1 compiler to the stage1 package
  database.
* Stage 2 cross compilers need to use stage2 libraries, so likewise, we
  should set the package database path to `_build/stage2/lib/`

* The normal situation is where the stage2 compiler uses stage1
  libraries. Then everything lines up.

* When installing we have rearranged everything so that the settings
  file and package database line up properly, so then everything should
  continue to work as before. In this case we set the relative package
  db path to `package.conf.d`, so it resolves the same as before.

* ghc-pkg needs to be modified as well to look in the settings file fo
  the package database rather than assuming the global package database
  location relative to the lib folder.

* Cabal/cabal-install will work correctly because they query the global
  package database using `--print-global-package-db`.

A reasonable question is why not generate the "right" settings files in
the right places in GHC's build system. In order to do this you would
need to engineer wrappers for all executables to point to a specific
libdir. There are also situations where the same package db is used by
two different compilers with two different settings files (think stage2
cross compiler and stage3 compiler).

In short, this 10 line patch allows for some reasonable simplifications
in Hadrian at very little cost to anything else.

Fixes #24502

- - - - -
4c8f1794 by Matthew Pickering at 2024-03-19T14:48:44-04:00
hadrian: Remove stage1 testsuite wrappers logic

Now instead of producing wrappers which pass the global package database
argument to ghc and ghc-pkg, we write the location of the correct
package database into the settings file so you can just use the intree
compiler directly.

- - - - -
da0d8ba5 by Matthew Craven at 2024-03-19T14:49:20-04:00
Remove unused ghc-internal module "GHC.Internal.Constants"

- - - - -
b56d2761 by Matthew Craven at 2024-03-19T14:49:20-04:00
CorePrep: Rework lowering of BigNat# literals

Don't use bigNatFromWord#, because that's terrible:
 * We shouldn't have to traverse a linked list at run-time
   to build a BigNat# literal. That's just silly!
 * The static List object we have to create is much larger
   than the actual BigNat#'s contents, bloating code size.
 * We have to read the corresponding interface file,
   which causes un-tracked implicit dependencies. (#23942)

Instead, encode them into the appropriate platform-dependent
sequence of bytes, and generate code that copies these bytes
at run-time from an Addr# literal into a new ByteArray#.
A ByteArray# literal would be the correct thing to generate,
but these are not yet supported; see also #17747.

Somewhat surprisingly, this change results in a slight
reduction in compiler allocations, averaging around 0.5%
on ghc's compiler performance tests, including when compiling
programs that contain no bignum literals to begin with.
The specific cause of this has not been investigated.

Since this lowering no longer reads the interface file for
GHC.Num.BigNat, the reasoning in Note [Depend on GHC.Num.Integer]
is obsoleted.  But the story of un-tracked built-in dependencies
remains complex, and Note [Tracking dependencies on primitives]
now exists to explain this complexity.

Additionally, many empty imports have been modified to refer to
this new note and comply with its guidance.  Several empty imports
necessary for other reasons have also been given brief explanations.

Metric Decrease:
    MultiLayerModulesTH_OneShot

- - - - -
349ea330 by Fendor at 2024-03-19T14:50:00-04:00
Eliminate thunk in 'IfaceTyCon'

Heap analysis showed that `IfaceTyCon` retains a thunk to
`IfaceTyConInfo`, defeating the sharing of the most common instances of
`IfaceTyConInfo`.
We make sure the indirection is removed by adding bang patterns to
`IfaceTyCon`.

Experimental results on the agda code base, where the `mi_extra_decls`
were read from disk:

Before this change, we observe around 8654045 instances of:

`IfaceTyCon[Name,THUNK_1_0]`

But these thunks almost exclusively point to a shared value!

Forcing the thunk a little bit more, leads to `ghc-debug` reporting:

`IfaceTyCon[Name:Name,IfaceTyConInfo]`

and a noticeable reduction of live bytes (on agda ~10%).

- - - - -
594bee0b by Krzysztof Gogolewski at 2024-03-19T14:50:36-04:00
Minor misc cleanups

- GHC.HsToCore.Foreign.JavaScript: remove dropRuntimeRepArgs;
  boxed tuples don't take RuntimeRep args
- GHC.HsToCore.Foreign.Call: avoid partial pattern matching
- GHC.Stg.Unarise: strengthen the assertion; we can assert that
  non-rubbish literals are unary rather than just non-void
- GHC.Tc.Gen.HsType: make sure the fsLit "literal" rule fires
- users_guide/using-warnings.rst: remove -Wforall-identifier,
  now deprecated and does nothing
- users_guide/using.rst: fix formatting
- andy_cherry/test.T: remove expect_broken_for(23272...), 23272 is fixed

The rest are simple cleanups.

- - - - -
cf55a54b by Ben Gamari at 2024-03-19T14:51:12-04:00
mk/relpath: Fix quoting

Previously there were two instances in this script which lacked proper
quoting. This resulted in `relpath` invocations in the binary
distribution Makefile producing incorrect results on Windows, leading to
confusing failures from `sed` and the production of empty package
registrations.

Fixes #24538.

- - - - -
5ff88389 by Bryan Richter at 2024-03-19T14:51:48-04:00
testsuite: Disable T21336a on wasm

- - - - -
60023351 by Ben Gamari at 2024-03-19T22:33:10-04:00
hadrian/bindist: Eliminate extraneous `dirname` invocation

Previously we would call `dirname` twice per installed library file.
We now instead reuse this result. This helps appreciably on Windows, where
processes are quite expensive.

- - - - -
616ac300 by Ben Gamari at 2024-03-19T22:33:10-04:00
hadrian: Package mingw toolchain in expected location

This fixes #24525, a regression due to 41cbaf44a6ab5eb9fa676d65d32df8377898dc89.
Specifically, GHC expects to find the mingw32 toolchain in the binary distribution
root. However, after this patch it was packaged in the `lib/` directory.

- - - - -
de9daade by Ben Gamari at 2024-03-19T22:33:11-04:00
gitlab/rel_eng: More upload.sh tweaks

- - - - -
1dfe12db by Ben Gamari at 2024-03-19T22:33:11-04:00
rel_eng: Drop dead prepare_docs codepath

- - - - -
dd2d748b by Ben Gamari at 2024-03-19T22:33:11-04:00
rel_env/recompress_all: unxz before recompressing

Previously we would rather compress the xz *again*, before in addition
compressing it with the desired scheme.

Fixes #24545.

- - - - -
9d936c57 by Ben Gamari at 2024-03-19T22:33:11-04:00
mk-ghcup-metadata: Fix directory of testsuite tarball

As reported in #24546, the `dlTest` artifact should be extracted into
the `testsuite` directory.

- - - - -
6d398066 by Ben Gamari at 2024-03-19T22:33:11-04:00
ghcup-metadata: Don't populate dlOutput unless necessary

ghcup can apparently infer the output name of an artifact from its URL.
Consequently, we should only include the `dlOutput` field when it would
differ from the filename of `dlUri`.

Fixes #24547.

- - - - -
576f8b7e by Zubin Duggal at 2024-03-19T22:33:46-04:00
Revert "Apply shellcheck suggestion to SUBST_TOOLDIR"

This reverts commit c82770f57977a2b5add6e1378f234f8dd6153392.

The shellcheck suggestion is spurious and results in SUBST_TOOLDIR being a
no-op. `set` sets positional arguments for bash, but we want to set the variable
given as the first autoconf argument.

Fixes #24542

Metric decreases because the paths in the settings file are now shorter,
so we allocate less when we read the settings file.

-------------------------
Metric Decrease:
    T12425
    T13035
    T9198
-------------------------

- - - - -
cdfe6e01 by Fendor at 2024-03-19T22:34:22-04:00
Compact serialisation of IfaceAppArgs

In #24563, we identified that IfaceAppArgs serialisation tags each
cons cell element with a discriminator byte. These bytes add up
quickly, blowing up interface files considerably when
'-fwrite-if-simplified-core' is enabled.

We compact the serialisation by writing out the length of
'IfaceAppArgs', followed by serialising the elements directly without
any discriminator byte.

This improvement can decrease the size of some interface files by up
to 35%.

- - - - -
97a2bb1c by Simon Peyton Jones at 2024-03-20T17:11:29+00:00
Expand untyped splices in tcPolyExprCheck

Fixes #24559

- - - - -
5f275176 by Alan Zimmerman at 2024-03-20T22:44:12-04:00
EPA: Clean up Exactprint helper functions a bit

- Introduce a helper lens to compose on `EpAnn a` vs `a` versions
- Rename some prime versions of functions back to non-prime
  They were renamed during the rework

- - - - -
da2a10ce by Vladislav Zavialov at 2024-03-20T22:44:48-04:00
Type operators in promoteOccName (#24570)

Type operators differ from term operators in that they are lexically
classified as (type) constructors, not as (type) variables.

Prior to this change, promoteOccName did not account for this
difference, causing a scoping issue that affected RequiredTypeArguments.

  type (!@#) = Bool
  f = idee (!@#)      -- Not in scope: ‘!@#’  (BUG)

Now we have a special case in promoteOccName to account for this.

- - - - -
247fc0fa by Preetham Gujjula at 2024-03-21T10:19:18-04:00
docs: Remove mention of non-existent Ord instance for Complex

The documentation for Data.Complex says that the Ord instance for Complex Float
is deficient, but there is no Ord instance for Complex a. The Eq instance for
Complex Float is similarly deficient, so we use that as an example instead.

- - - - -
6fafc51e by Andrei Borzenkov at 2024-03-21T10:19:54-04:00
Fix TH handling in `pat_to_type_pat` function (#24571)

There was missing case for `SplicePat` in `pat_to_type_at` function,
hence patterns with splicing that checked against `forall->` doesn't work
properly because they fall into the "illegal pattern" case.

Code example that is now accepted:

  g :: forall a -> ()
  g $([p| a |]) = ()

- - - - -
52072f8e by Sylvain Henry at 2024-03-21T21:01:59-04:00
Type-check default declarations before deriving clauses (#24566)

See added Note and #24566. Default declarations must be type-checked
before deriving clauses.

- - - - -
7dfdf3d9 by Sylvain Henry at 2024-03-21T21:02:40-04:00
Lexer: small perf changes

- Use unsafeChr because we know our values to be valid
- Remove some unnecessary use of `ord` (return Word8 values directly)

- - - - -
864922ef by Sylvain Henry at 2024-03-21T21:02:40-04:00
JS: fix some comments

- - - - -
3e0b2b1f by Sebastian Graf at 2024-03-21T21:03:16-04:00
Simplifier: Re-do dependency analysis in abstractFloats (#24551)

In #24551, we abstracted a string literal binding over a type variable,
triggering a CoreLint error when that binding floated to top-level.

The solution implemented in this patch fixes this by re-doing dependency
analysis on a simplified recursive let binding that is about to be type
abstracted, in order to find the minimal set of type variables to abstract over.
See wrinkle (AB5) of Note [Floating and type abstraction] for more details.

Fixes #24551

- - - - -
8a8ac65a by Matthew Craven at 2024-03-23T00:20:52-04:00
Improve toInteger @Word32 on 64-bit platforms

On 64-bit platforms, every Word32 fits in an Int, so we can
convert to Int# without having to perform the overflow check
integerFromWord# uses internally.

- - - - -
0c48f2b9 by Apoorv Ingle at 2024-03-23T00:21:28-04:00
Fix for #24552 (see testcase T24552)

Fixes for a bug in desugaring pattern synonyms matches, introduced
while working on  on expanding `do`-blocks in #18324

The `matchWrapper` unecessarily (and incorrectly) filtered out the
default wild patterns in a match. Now the wild pattern alternative is
simply ignored by the pm check as its origin is `Generated`.
The current code now matches the expected semantics according to the language spec.

- - - - -
b72705e9 by Simon Peyton Jones at 2024-03-23T00:22:04-04:00
Print more info about kinds in error messages

This fixes #24553, where GHC unhelpfully said

  error: [GHC-83865]
    • Expected kind ‘* -> * -> *’, but ‘Foo’ has kind ‘* -> * -> *’

See Note [Showing invisible bits of types in error messages]

- - - - -
8f7cfc7e by Tristan Cacqueray at 2024-03-23T00:22:44-04:00
docs: remove the don't use float hint

This hint is outdated, ``Complex Float`` are now specialised,
and the heap space suggestion needs more nuance so it should
be explained in the unboxed/storable array documentation.

- - - - -
5bd8ed53 by Andreas Klebinger at 2024-03-23T16:18:33-04:00
NCG: Fix a bug in jump shortcutting.

When checking if a jump has more than one destination account for the
possibility of some jumps not being representable by a BlockId.

We do so by having isJumpishInstr return a `Maybe BlockId` where Nothing
represents non-BlockId jump destinations.

Fixes #24507

- - - - -
8d67f247 by Ben Gamari at 2024-03-23T16:19:09-04:00
docs: Drop old release notes, add for 9.12.1

- - - - -
7db8c992 by Cheng Shao at 2024-03-25T13:45:46-04:00
rts: fix clang compilation on aarch64

This patch fixes function prototypes in ARMOutlineAtomicsSymbols.h
which causes "error: address argument to atomic operation must be a
pointer to _Atomic type" when compiling with clang on aarch64.

- - - - -
237194ce by Sylvain Henry at 2024-03-25T13:46:27-04:00
Lexer: fix imports for Alex 3.5.1 (#24583)

- - - - -
810660b7 by Cheng Shao at 2024-03-25T22:19:16-04:00
libffi-tarballs: bump libffi-tarballs submodule to libffi 3.4.6

This commit bumps the libffi-tarballs submodule to libffi 3.4.6, which
includes numerous upstream libffi fixes, especially
https://github.com/libffi/libffi/issues/760.

- - - - -
d2ba41e8 by Alan Zimmerman at 2024-03-25T22:19:51-04:00
EPA: do not duplicate comments in signature RHS

- - - - -
32a8103f by Rodrigo Mesquita at 2024-03-26T21:16:12-04:00
configure: Use LDFLAGS when trying linkers

A user may configure `LDFLAGS` but not `LD`. When choosing a linker, we
will prefer `ldd`, then `ld.gold`, then `ld.bfd` -- however, we have to
check for a working linker. If either of these fail, we try the next in
line.

However, we were not considering the `$LDFLAGS` when checking if these
linkers worked. So we would pick a linker that does not support the
current $LDFLAGS and fail further down the line when we used that linker
with those flags.

Fixes #24565, where `LDFLAGS=-Wl,-z,pack-relative-relocs` is not
supported by `ld.gold` but that was being picked still.

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bf65a7c3 by Rodrigo Mesquita at 2024-03-26T21:16:48-04:00
bindist: Clean xattrs of bin and lib at configure time

For issue #21506, we started cleaning the extended attributes of
binaries and libraries from the bindist *after* they were installed to
workaround notarisation (#17418), as part of `make install`.

However, the `ghc-toolchain` binary that is now shipped with the bindist
must be run at `./configure` time. Since we only cleaned the xattributes
of the binaries and libs after they were installed, in some situations
users would be unable to run `ghc-toolchain` from the bindist, failing
at configure time (#24554).

In this commit we move the xattr cleaning logic to the configure script.

Fixes #24554

- - - - -
cfeb70d3 by Rodrigo Mesquita at 2024-03-26T21:17:24-04:00
Revert "NCG: Fix a bug in jump shortcutting."

This reverts commit 5bd8ed53dcefe10b72acb5729789e19ceb22df66.

Fixes #24586

- - - - -
13223f6d by Serge S. Gulin at 2024-03-27T07:28:51-04:00
JS: `h$rts_isProfiled` is removed from `profiling` and left its version at
`rts/js/config.js`

- - - - -
0acfe391 by Alan Zimmerman at 2024-03-27T07:29:27-04:00
EPA: Do not extend declaration range for trailine zero len semi

The lexer inserts virtual semicolons having zero width.
Do not use them to extend the list span of items in a list.

- - - - -
4ce5aa2c by Jade at 2024-03-29T23:08:09+01:00
Add four way merge to Data.List.sort(By)

This patch aims to implement an improved version of Data.List.sortBy and therefore Data.List.sort which increases performance by up to 20% on larger lists, but also ~10% on lists of size 100 and smaller.
This approach implements a four-way merge which also reuses comparisons.

Fixes #24280

-------------------------
Metric Decrease:
    MultiLayerModulesTH_Make
    T10421
    T13719
    T15164
    T18698a
    T18698b
    T1969
    T9872a
    T9961
    WWRec
-------------------------

- - - - -


30 changed files:

- .ghcid
- .gitignore
- .gitlab-ci.yml
- .gitlab/ci.sh
- .gitlab/darwin/nix/sources.json
- .gitlab/darwin/toolchain.nix
- .gitlab/generate-ci/gen_ci.hs
- .gitlab/jobs.yaml
- .gitlab/rel_eng/default.nix
- .gitlab/rel_eng/fetch-gitlab-artifacts/fetch_gitlab.py
- .gitlab/rel_eng/mk-ghcup-metadata/README.mkd
- .gitlab/rel_eng/mk-ghcup-metadata/mk_ghcup_metadata.py
- + .gitlab/rel_eng/recompress-all
- .gitlab/rel_eng/upload.sh
- .gitlab/rel_eng/upload_ghc_libs.py
- compiler/GHC.hs
- compiler/GHC/Builtin/Names.hs
- compiler/GHC/Builtin/Names/TH.hs
- compiler/GHC/Builtin/PrimOps.hs-boot
- compiler/GHC/Builtin/Types.hs
- compiler/GHC/Builtin/Types.hs-boot
- compiler/GHC/Builtin/Types/Literals.hs
- compiler/GHC/Builtin/Types/Prim.hs
- compiler/GHC/Builtin/Uniques.hs
- compiler/GHC/Builtin/primops.txt.pp
- compiler/GHC/Cmm.hs
- compiler/GHC/Cmm/CommonBlockElim.hs
- compiler/GHC/Cmm/ContFlowOpt.hs
- compiler/GHC/Cmm/Dataflow.hs
- − compiler/GHC/Cmm/Dataflow/Collections.hs


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/c124815cca77a12f4e2e6fc4e8a390909b9fa7ba...4ce5aa2cecbfac659e0647b8aea27659e0a3b177

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/c124815cca77a12f4e2e6fc4e8a390909b9fa7ba...4ce5aa2cecbfac659e0647b8aea27659e0a3b177
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