[Git][ghc/ghc][wip/sjakobi/multi-caret] 30 commits: Implement List.elem via foldr
by Simon Jakobi (＠sjakobi2) 02 Jun '26
by Simon Jakobi (＠sjakobi2) 02 Jun '26
02 Jun '26
Simon Jakobi pushed to branch wip/sjakobi/multi-caret at Glasgow Haskell Compiler / GHC
Commits:
72c8de5c by Simon Jakobi at 2026-05-23T18:41:42-04:00
Implement List.elem via foldr
...in order to allow specialization to Eq instances.
The implementation of notElem is updated for consistency.`
Corresponding CLC proposal:
https://github.com/haskell/core-libraries-committee/issues/412
Addresses #27096.
- - - - -
3268c610 by Alan Zimmerman at 2026-05-23T18:42:30-04:00
EPA: Fix span for qualified multiline string
Fix the span for a qualified multiline string like
Text."""
I'm a multiline
Text value
!
"""
to extend to the end of the entire string, not just the first line.
Closes #27274
- - - - -
1f096790 by Alan Zimmerman at 2026-05-23T18:43:20-04:00
EPA: Fix exact printing namespace-specified wildcards
Ensures correct printing of imports of the form
import Data.Bool (data True(data ..))
import Data.Bool (data True(type ..))
Closes #27291
- - - - -
56ada7c0 by Mrjtjmn at 2026-05-23T18:44:19-04:00
Fix ambiguous syntax of BangPatterns in users guide
Update documentation for the BangPatterns extension to specify
how surrounding whitespace affects interpretation of `!`.
* Only when there is whitespace before `!` and no whitespace after,
it is recognized as a BangPattern.
* Other cases `⟨varid⟩!⟨varid⟩`, `⟨varid⟩ ! ⟨varid⟩`, `⟨varid⟩! ⟨varid⟩`
are treated as infix operators.
- - - - -
579aa0b7 by Simon Jakobi at 2026-05-25T16:31:26-04:00
Ensure that SetOps.{minusList,unionListsOrd} can be specialized
...by marking them INLINABLE. Haddock allocates 0.1–0.3% less as a
result.
This also removes some redundant constraints on unionListsOrd.
- - - - -
cccf45da by Cheng Shao at 2026-05-25T16:32:13-04:00
wasm: ensure post-linker output is synchronous ESM
This patch fixes wasm backend's post-linker output script to ensure
it's synchronous ESM and doesn't use top-level await, which doesn't
work in ServiceWorkers. Fixes #27257.
- - - - -
8db331a3 by Zubin Duggal at 2026-05-26T04:54:03-04:00
Update to semaphore-compat 2.0.0 using v2 of the protocol
On Linux and other POSIX platforms, GHC's -jsem jobserver client now
speaks v2 of the semaphore-compat protocol, which uses Unix domain
sockets in place of POSIX named semaphores. This avoids the libc-ABI
issues that affected the old implementation. Windows is unaffected
and continues to use the v1 protocol (Win32 named semaphores); its
reported protocol version remains v1.
When GHC receives a -jsem name whose protocol version it does not
support, it emits a -Wsemaphore-version-mismatch warning and falls
back to -j<N> rather than crashing. ghc --info exposes the supported
version in a new "Semaphore version" entry so cabal-install can detect
a mismatch before invoking GHC.
Users on a cabal-install that predates the v2 update will continue to
build successfully on Linux/POSIX, but will lose the cross-process
-jsem coordination and fall back to -j<N> per GHC invocation. Users
must upgrade to a cabal-install that supports protocol v2 to recover
full parallelism.
Also fix a leak in cleanupSem (#27253): cleanupSem used to snapshot
heldTokens and release them before killing the loop, while the loop's
in-flight acquire/release children could still be mutating it.
Cleanup now runs inside the loop's own exit handler, after draining
the active child via a new activeChild TVar, so the snapshot has no
concurrent mutator.
See also:
- GHC proposal amendment: https://github.com/ghc-proposals/ghc-proposals/pull/673
- cabal-install patch: https://github.com/haskell/cabal/pull/11628
- semaphore-compat MR: https://gitlab.haskell.org/ghc/semaphore-compat/-/merge_requests/8
Bump semaphore-compat submodule to 2.0.0
Fixes #25087 and #27253
- - - - -
17be4f1f by Alan Zimmerman at 2026-05-26T04:54:52-04:00
EPA: Record semicolons in HsModifier
Ensure the semi colons are captured in the ParsedSource for code like
%True;; %False;
instance C D
It makes HsModifier (and hence HsModifierOf) LocatedA, so the semi
colons can be recorded as [TrailingAnn]
Also rename pprHsModifiers to pprLHsModifiers to match.
Closes #27294
- - - - -
8f991755 by fendor at 2026-05-26T11:02:52-04:00
Revert prog003 acceptance
We thought the commit 286f1adff3e78d775ff325caff71d0cee25d710b fixed the
test, but due to changes to ghci, modules loaded during the GHCi
session, the test was actually no longer testing what it set out to do,
"fixing" the broken test.
As modules are added to the `interactive-session` home unit, the object code needs
to be compiled with `-this-unit-id interactive-session`, otherwise the
object code won't be used.
Once this has been fixed in the test, the test fails as expected again.
- - - - -
277a3687 by mangoiv at 2026-05-26T11:03:40-04:00
libraries/process: bump submodule to v1.6.29.0
This submodule bump resolves a segfault on macos 15.
Fixes #27144
- - - - -
6779bb0c by mangoiv at 2026-05-26T11:03:40-04:00
libraries/unix: in submodule, don't pick branch 2.7
The 2.7 branch is outdated and the module has been advanced far beyond
it anyway, so remove that line.
- - - - -
4a645683 by Simon Peyton Jones at 2026-05-27T21:41:59-04:00
Trim the continuation in mkDupableContWithDmds
When there are no remaining argument demands, it means the application
is bottoming. In this case, we can trim the continuation to avoid the
panic that was observed in #27261.
See Note [Trimming the continuation for bottoming functions] in
GHC.Core.Opt.Simplify.Iteration.
- - - - -
8ab506ff by Cheng Shao at 2026-05-27T21:42:47-04:00
ghci: fix module name string lifetime in hs_hpc_module invocation
This patch makes hpcAddModule pass a properly malloced module name
string to hs_hpc_module, instead of using useAsCString which causes
use-after-free of module name string. Fixes #27297.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
b0233814 by sheaf at 2026-05-27T21:43:31-04:00
Relax acceptance threshold for T10421
As seen in #27289, the 1% acceptance threshold for this text was
overly narrow, resulting in spurious test failures. This commit widens
the acceptance threshold to 2%. Fixes #27289.
- - - - -
63ce5770 by Luite Stegeman at 2026-05-28T12:23:35-04:00
Fixes for black holes
- suspend duplicate work for eager black holes
- detect eager black holes in checkBlockingQueues
- don't overwrite existing black holes even if they're not
in an eager blackhole frame
- don't deadlock on self when thunk is already blackholed
Fixes #26936
- - - - -
037a80dc by Tom McLaughlin at 2026-05-28T12:24:36-04:00
Event/Windows.hsc: rethrow exceptions in overlapped IO
This prevents the WinIO manager from swallowing exceptions in overlapped IO. It
was added to make WinIO support possible in the `network` library. See
https://gitlab.haskell.org/ghc/ghc/-/issues/27283.
We also bump __IO_MANAGER_WINIO__ to 2 so libraries can gate on this using CPP.
- - - - -
2d53bcdb by Wolfgang Jeltsch at 2026-05-28T12:25:21-04:00
Allow `downsweep` to use nodes of an existing module graph
To this end, `downsweep` has not been able to use the nodes of a module
graph obtained from a previous downsweeping round. In some GHC API
applications, downsweeping is performed somewhat incrementally and
therefore could profit from reusing such existing results. This
contribution makes this possible.
Resolves #27054.
Co-authored-by: Matthew Pickering <matthewtpickering(a)gmail.com>
- - - - -
f4fbb583 by Simon Jakobi at 2026-05-28T12:26:04-04:00
Add regression test for T11226
Closes #11226.
- - - - -
ed29a5e6 by Sven Tennie at 2026-05-28T17:30:36-04:00
Add optional config setting for LibDir (#19174)
Previously, the `libDir` was derived from `topDir`. This won't work for
inplace stage2 cross-compilers where binaries and libraries are in
different stage dirs (`_build/stage1/` for executables and
`_build/stage2` for libraries).
`LibDir` is set in the inplace `settings` files. For bindists, we
generate a new `settings` file with no `LibDir` entry. GHC then defaults
to use `topDir` as `libDir` again. This keeps the bindist relocatable.
If `LibDir` is a relative path, it is interpreted relatively to
`topDir`.
The global package db is part of the `lib/` folder. If we want to point
for inplace cross-compilers to the succeeding stage's folder, this is
done by setting `LibDir`. Thus, the global package db must be found
relative to `libDir`` (which may default to `topDir` or be set by
`LibDir`).
The complexity of settings becomes scary. So, add a test to ensure
`LibDir` works as expected.
- - - - -
8339cf8f by Sven Tennie at 2026-05-28T17:30:36-04:00
Add Haddock to FileSettings
Helping to understand the fields' meanings without deeper analyses.
- - - - -
4ce251e4 by Sylvain Henry at 2026-05-28T17:31:39-04:00
foundation test: skip signed minBound `quot` (-1) (#27222)
`minBound `quot` (-1)` for fixed-width signed integers is platform
dependent: the mathematical result -minBound is not representable in
the type. On x86, IDIV traps; LLVM's sdiv is undefined behaviour in
this case; on AArch64/RISC-V, SDIV wraps to minBound.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
b8ba7e61 by Simon Jakobi at 2026-05-28T17:32:23-04:00
Prevent dictionary-passing in checkTyEqRhs
...by pre-specializing it to TcM.
Previously, wherever checkTyEqRhs was used in other modules, the
Core showed dictionary passing ($fMonadIOEnv). The added SPECIALIZE
pragma prevents this.
- - - - -
d603477f by David Eichmann at 2026-05-29T13:17:12-04:00
Hadrian: create a ghc-internal .def file per ghc-internal dll
The .def file generated from rts/win32/libHSghc-internal.def.in contains
the name of the ghc-internal dll. The correct dll name differs based
on if the dll is inplace/final and if using the Dynamic way. Previously,
this was not accounted for and inconsistent dlls names where used. That
led to failure when loading dlls at runtime in experiments with windows
dynamic linking.
- - - - -
1fc21753 by Sylvain Henry at 2026-05-29T13:18:14-04:00
ghc-bignum: copy backend interface haddocks to Native backend (#27305)
The haddock comments documenting the BigNat backend interface (function
contracts, expected MutableWordArray# sizes, return-value semantics, etc.)
were attached to the FFI backend module. Copy them to the Native backend
so they remain in tree once the FFI backend is removed.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
717059df by Sylvain Henry at 2026-05-29T13:18:14-04:00
ghc-bignum: remove FFI backend (#27305)
The FFI backend of ghc-bignum (now part of ghc-internal) had no known
users and is easy to recreate by relinking ghc-internal with a custom
backend. Remove the backend module, the bignum-ffi cabal flag, and the
ffi option from Hadrian's --bignum selector. The backend interface
documentation now lives in the Native backend module.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
4bb3b1d8 by Sylvain Henry at 2026-05-29T13:18:14-04:00
ghc-bignum: remove Check backend (#27305)
The Check backend of ghc-bignum (now part of ghc-internal) compared the
selected backend's output against the Native backend for validation.
It had no known users. Remove the backend module, the bignum-check
cabal flag, the bignumCheck Hadrian flavour field, and the check-
prefix in Hadrian's --bignum selector.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
6b3044a0 by David Eichmann at 2026-05-30T11:58:48-04:00
Add code comments to allocator code
- - - - -
f4e04210 by Matthew Pickering at 2026-05-30T11:59:34-04:00
hadrian: Refactor system-cxx-std-lib rules
I noticed a few things wrong with the hadrian rules for
`system-cxx-std-lib` rules.
* For `text` there is an ad-hoc check to depend on `system-cxx-std-lib`
outside of `configurePackage`.
* The `system-cxx-std-lib` dependency is not read from cabal files.
* Recache is not called on the packge database after the `.conf` file is
generated, a more natural place for this rule is `registerRules`.
Treating this uniformly like other packages is complicated by it not
having any source code or a cabal file. However we can do a bit better
by reporting the dependency firstly in `PackageData` and then needing
the `.conf` file in the same place as every other package in
`configurePackage`.
This commit increases the `shakeVersion`, to provide backwards
compatibility to previous builds with different PackageData.
Fixes #25303
Co-authored-by: Sven Tennie <sven.tennie(a)gmail.com>
- - - - -
b335fbdc by Simon Jakobi at 2026-06-02T01:01:21+02:00
Add support for related locations in Diagnostic
* Convert TcRnBindingNameConflict to demonstrate this feature.
* Enable -fdiagnostics-show-caret in some tests to show what error
messages with multiple caret sections look like.
* Carry diagnostic related spans through MessageClass.
This prepares the ground for #22637. The diagnosticRelatedLocations
name is inspired by #23414.
- - - - -
335251cc by Simon Jakobi at 2026-06-02T01:08:39+02:00
Add related locations to duplicate-declaration and duplicate-export errors
Attach diagnosticRelatedLocations (multi-caret) to:
* TcRnDuplicateDecls
* TcRnDuplicateExport
* TcRnDuplicateNamedDefaultExport
Enable -fdiagnostics-show-caret for the DuplicateExports and T25857
tests to exercise the new caret sections.
check_occs now threads LIE GhcPs so these export items can carry their
source spans. TcRnConflictingExports and TcRnDuplicateFieldExport were
also tried but reverted to IE GhcPs: their export items already appear
in the message text and name provenance is rendered too, so the carets
only duplicated the primary span.
Assisted-by: Claude Opus 4.8 <noreply(a)anthropic.com>
- - - - -
172 changed files:
- .gitmodules
- + changelog.d/T27261
- + changelog.d/bump-process
- + changelog.d/elem-via-foldr-27096
- + changelog.d/fix-blackhole-handling
- + changelog.d/hadrian-system-cxx-std-lib-25303
- + changelog.d/jobserver-leak-fix
- + changelog.d/libdir-setting
- + changelog.d/module-graph-reuse-in-downsweep
- + changelog.d/remove-bignum-check-backend
- + changelog.d/remove-bignum-ffi-backend
- + changelog.d/semaphore-v2
- + changelog.d/wasm-fix-serviceworker
- + changelog.d/windows-rethrow-overlapped-exception
- compiler/GHC/Core/Opt/Monad.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Opt/Simplify/Utils.hs
- compiler/GHC/Data/List/SetOps.hs
- compiler/GHC/Driver/Config/Interpreter.hs
- compiler/GHC/Driver/Downsweep.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Errors.hs
- compiler/GHC/Driver/Errors/Ppr.hs
- compiler/GHC/Driver/Errors/Types.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/MakeAction.hs
- compiler/GHC/Driver/MakeSem.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Binds.hs
- compiler/GHC/Hs/Decls.hs
- compiler/GHC/Hs/Pat.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/HsToCore/Errors/Ppr.hs
- compiler/GHC/HsToCore/Errors/Types.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Errors/Types.hs
- compiler/GHC/Parser/Lexer.x
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Parser/Types.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/Rename/Pat.hs
- compiler/GHC/Rename/Utils.hs
- compiler/GHC/Settings.hs
- compiler/GHC/Settings/IO.hs
- compiler/GHC/SysTools/Cpp.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Bind.hs
- compiler/GHC/Tc/Gen/Export.hs
- compiler/GHC/Tc/Gen/HsType.hs
- compiler/GHC/Tc/Gen/Sig.hs
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/Error.hs
- compiler/GHC/Types/Error.hs-boot
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/Hint.hs
- compiler/GHC/Types/Hint/Ppr.hs
- compiler/GHC/Utils/Error.hs
- compiler/GHC/Utils/Logger.hs
- compiler/Language/Haskell/Syntax/Binds.hs
- compiler/Language/Haskell/Syntax/Decls.hs
- compiler/Language/Haskell/Syntax/Decls/Foreign.hs
- compiler/Language/Haskell/Syntax/Pat.hs
- compiler/Language/Haskell/Syntax/Type.hs
- docs/users_guide/exts/stolen_syntax.rst
- docs/users_guide/using-warnings.rst
- docs/users_guide/using.rst
- ghc/GHCi/UI.hs
- hadrian/README.md
- hadrian/doc/user-settings.md
- hadrian/src/CommandLine.hs
- hadrian/src/Flavour.hs
- hadrian/src/Flavour/Type.hs
- hadrian/src/Hadrian/Haskell/Cabal/Parse.hs
- hadrian/src/Hadrian/Haskell/Cabal/Type.hs
- hadrian/src/Main.hs
- hadrian/src/Rules/BinaryDist.hs
- hadrian/src/Rules/Generate.hs
- hadrian/src/Rules/Library.hs
- hadrian/src/Rules/Register.hs
- hadrian/src/Rules/Rts.hs
- hadrian/src/Settings.hs
- hadrian/src/Settings/Builders/RunTest.hs
- hadrian/src/Settings/Default.hs
- hadrian/src/Settings/Packages.hs
- libraries/base/changelog.md
- libraries/base/tests/perf/ElemNoFusion_O1.stderr
- libraries/base/tests/perf/ElemNoFusion_O2.stderr
- libraries/ghc-bignum/ghc-bignum.cabal
- + libraries/ghc-boot/GHC/Data/ShortByteString.hs
- libraries/ghc-boot/GHC/Settings/Utils.hs
- libraries/ghc-boot/ghc-boot.cabal.in
- libraries/ghc-internal/bignum-backend.rst
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend.hs
- − libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/Check.hs
- − libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/FFI.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/Native.hs
- − libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/Selected.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Windows.hsc
- libraries/ghc-internal/src/GHC/Internal/List.hs
- libraries/ghci/GHCi/Coverage.hs
- libraries/ghci/GHCi/Run.hs
- libraries/process
- libraries/semaphore-compat
- rts/Messages.c
- rts/ThreadPaused.c
- rts/Threads.c
- rts/Updates.h
- rts/include/rts/storage/ClosureMacros.h
- rts/sm/BlockAlloc.c
- rts/sm/MBlock.c
- rts/win32/libHSghc-internal.def.in
- testsuite/tests/MiniQuickCheck.hs
- testsuite/tests/default/T25857.stderr
- testsuite/tests/default/all.T
- testsuite/tests/diagnostic-codes/codes.stdout
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/A.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/B.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/C.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/D.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/X.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/Y.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/Z.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.stdout
- testsuite/tests/ghc-api/downsweep/OldModLocation.hs
- testsuite/tests/ghc-api/downsweep/PartialDownsweep.hs
- testsuite/tests/ghc-api/downsweep/all.T
- testsuite/tests/ghc-api/fixed-nodes/InterfaceModuleGraph.hs
- + testsuite/tests/ghc-api/settings/LibDir.hs
- + testsuite/tests/ghc-api/settings/LibDir.stdout
- + testsuite/tests/ghc-api/settings/all.T
- testsuite/tests/ghci/prog003/prog003.T
- testsuite/tests/ghci/prog003/prog003.script
- testsuite/tests/numeric/should_run/foundation.hs
- testsuite/tests/overloadedrecflds/should_fail/DuplicateExports.stderr
- testsuite/tests/overloadedrecflds/should_fail/all.T
- testsuite/tests/patsyn/should_fail/T14114.stderr
- testsuite/tests/patsyn/should_fail/all.T
- testsuite/tests/perf/compiler/all.T
- + testsuite/tests/perf/should_run/T11226.hs
- + testsuite/tests/perf/should_run/T11226.stdout
- testsuite/tests/perf/should_run/all.T
- testsuite/tests/printer/Makefile
- testsuite/tests/printer/PprModifiers.hs
- + testsuite/tests/printer/PprQualifiedStrings.hs
- + testsuite/tests/printer/Test27291.hs
- testsuite/tests/printer/all.T
- testsuite/tests/rename/should_fail/T7164.stderr
- testsuite/tests/rename/should_fail/all.T
- testsuite/tests/rename/should_fail/rnfail004.stderr
- + testsuite/tests/simplCore/should_compile/T27261.hs
- + testsuite/tests/simplCore/should_compile/T27261_aux.hs
- testsuite/tests/simplCore/should_compile/all.T
- testsuite/tests/typecheck/should_fail/all.T
- testsuite/tests/typecheck/should_fail/tcfail038.stderr
- utils/check-exact/ExactPrint.hs
- utils/check-exact/Main.hs
- utils/haddock/haddock-api/src/Haddock/Backends/LaTeX.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Decl.hs
- utils/haddock/haddock-api/src/Haddock/Convert.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Rename.hs
- utils/haddock/haddock-api/src/Haddock/Interface/RenameType.hs
- utils/haddock/haddock-api/src/Haddock/Types.hs
- utils/jsffi/prelude.mjs
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/1f7ffaaadaa800daf07c937c690140…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/1f7ffaaadaa800daf07c937c690140…
You're receiving this email because of your account on gitlab.haskell.org.
1
0
[Git][ghc/ghc][wip/fix-26953] Decoupling 'L.H.S' from 'GHC.Types.SourceText'
by recursion-ninja (＠recursion-ninja) 02 Jun '26
by recursion-ninja (＠recursion-ninja) 02 Jun '26
02 Jun '26
recursion-ninja pushed to branch wip/fix-26953 at Glasgow Haskell Compiler / GHC
Commits:
08c2705f by Recursion Ninja at 2026-06-01T18:09:56-04:00
Decoupling 'L.H.S' from 'GHC.Types.SourceText'
* Migrated 'IntegralLit' to 'L.H.S.Lit'.
* Migrated 'FractionalLit' to 'L.H.S.Lit'.
* Migrated 'StringLiteral' to 'L.H.S.Lit'.
* Added TTG extension points to the types above.
* Added nice export list to 'GHC.Hs.Lit'.
* Added 'rnOverLitVal' and 'tcOverLitVal' functions to 'GHC.Hs.Lit'.
* Added instance 'Anno (StringLiteral (GhcPass p)) = SrcSpanAnnN'
* Moved [Notes] about 'SourceText' from 'L.H.S.*' to 'GHC.*'.
* Removed all references to 'SourceText' from 'L.H.S'.
* Removed the trailing comma record field from 'StringLiteral'
* Renamed exported functions for nomenclature consistency.
* Deprecated the renamed functions
Resolves issue #26953
- - - - -
52 changed files:
- compiler/GHC/Builtin/Utils.hs
- compiler/GHC/Hs/Binds.hs
- compiler/GHC/Hs/Decls.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/Instances.hs
- compiler/GHC/Hs/Lit.hs
- compiler/GHC/Hs/Utils.hs
- compiler/GHC/HsToCore/Expr.hs
- compiler/GHC/HsToCore/Match.hs
- compiler/GHC/HsToCore/Match/Literal.hs
- compiler/GHC/HsToCore/Pmc/Desugar.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/Iface/Syntax.hs
- compiler/GHC/Iface/Warnings.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/HaddockLex.x
- compiler/GHC/Parser/Lexer.x
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Rename/Bind.hs
- compiler/GHC/Rename/Expr.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/Rename/Lit.hs
- compiler/GHC/Rename/Module.hs
- compiler/GHC/Rename/Names.hs
- compiler/GHC/Rename/Pat.hs
- compiler/GHC/Rename/Utils.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Bind.hs
- compiler/GHC/Tc/Gen/Head.hs
- compiler/GHC/Tc/Gen/HsType.hs
- compiler/GHC/Tc/Utils/Instantiate.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/PkgQual.hs
- compiler/GHC/Types/SourceText.hs
- compiler/GHC/Unit/Module/Warnings.hs
- compiler/Language/Haskell/Syntax/Binds.hs
- compiler/Language/Haskell/Syntax/Binds/InlinePragma.hs
- compiler/Language/Haskell/Syntax/Decls.hs
- compiler/Language/Haskell/Syntax/Decls/Foreign.hs
- compiler/Language/Haskell/Syntax/Expr.hs
- compiler/Language/Haskell/Syntax/Extension.hs
- compiler/Language/Haskell/Syntax/Lit.hs
- utils/check-exact/ExactPrint.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Hyperlinker/Parser.hs
- utils/haddock/haddock-api/src/Haddock/Backends/LaTeX.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Decl.hs
- utils/haddock/haddock-api/src/Haddock/Interface/LexParseRn.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Rename.hs
- utils/haddock/haddock-api/src/Haddock/Types.hs
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/08c2705f000360340804cdd6153be42…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/08c2705f000360340804cdd6153be42…
You're receiving this email because of your account on gitlab.haskell.org.
1
0
[Git][ghc/ghc] Pushed new branch wip/dcoutts/idle-gc-rewrite2
by Duncan Coutts (＠dcoutts) 01 Jun '26
by Duncan Coutts (＠dcoutts) 01 Jun '26
01 Jun '26
Duncan Coutts pushed new branch wip/dcoutts/idle-gc-rewrite2 at Glasgow Haskell Compiler / GHC
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/dcoutts/idle-gc-rewrite2
You're receiving this email because of your account on gitlab.haskell.org.
1
0
[Git][ghc/ghc][wip/sjakobi/T25450-print-cpu] Add --print-enabled-cpu-features flag
by Simon Jakobi (＠sjakobi2) 01 Jun '26
by Simon Jakobi (＠sjakobi2) 01 Jun '26
01 Jun '26
Simon Jakobi pushed to branch wip/sjakobi/T25450-print-cpu at Glasgow Haskell Compiler / GHC
Commits:
d177606f by Simon Jakobi at 2026-06-01T22:51:53+02:00
Add --print-enabled-cpu-features flag
GHC now supports a new mode flag --print-enabled-cpu-features, which
prints a JSON object describing the CPU features currently enabled for
code generation, together with a set of -m... flags that reproduce the
effective feature set for the current target. Dynamic options such as
-mavx2 and -mbmi2 are respected.
$ ghc -mavx2 --print-enabled-cpu-features
{"tag":"enabled-cpu-features","version":1,"target":"x86_64-linux-gnu",
"features":["SSE","SSE2","SSE3","SSSE3","SSE4.1","SSE4.2","AVX","AVX2"],
"as_m_flags":["-mavx2"]}
The primary purpose of this flag is for testing the -march=native option
(#25450).
Assisted-by: Claude Opus 4.8 <noreply(a)anthropic.com>
- - - - -
14 changed files:
- + changelog.d/print-enabled-cpu-features
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Session.hs
- docs/users_guide/using.rst
- ghc/GHC/Driver/Session/Lint.hs
- ghc/GHC/Driver/Session/Mode.hs
- ghc/Main.hs
- testsuite/tests/driver/all.T
- + testsuite/tests/driver/print_enabled_cpu_features.stdout
- + testsuite/tests/driver/print_enabled_cpu_features_avx2.stdout
- + testsuite/tests/driver/print_enabled_cpu_features_avx512.stdout
- + testsuite/tests/driver/print_enabled_cpu_features_bmi2.stdout
- + testsuite/tests/driver/print_enabled_cpu_features_fma.stdout
- + testsuite/tests/driver/print_enabled_cpu_features_unknown_flag.stderr
Changes:
=====================================
changelog.d/print-enabled-cpu-features
=====================================
@@ -0,0 +1,16 @@
+section: compiler
+synopsis: Add --print-enabled-cpu-features flag
+issues: #25450
+mrs: !16117
+
+description:
+ GHC now supports a new mode flag ``--print-enabled-cpu-features``, which
+ prints a JSON object describing the CPU features currently enabled for code
+ generation, together with a set of ``-m...`` flags that reproduce the
+ effective feature set for the current target.
+ Dynamic options such as ``-mavx2`` and ``-mbmi2`` are respected. ::
+
+ $ ghc -mavx2 --print-enabled-cpu-features
+ {"tag":"enabled-cpu-features","version":1,"target":"x86_64-linux-gnu",
+ "features":["SSE","SSE2","SSE3","SSSE3","SSE4.1","SSE4.2","AVX","AVX2"],
+ "as_m_flags":["-mavx2"]}
=====================================
compiler/GHC/Driver/DynFlags.hs
=====================================
@@ -1615,6 +1615,7 @@ initPromotionTickContext dflags =
-- -----------------------------------------------------------------------------
-- SSE, AVX, FMA
+-- See Note [Keeping enabledCpuFeatures in sync] in GHC.Driver.Session
isSse3Enabled :: DynFlags -> Bool
isSse3Enabled dflags = sseAvxVersion dflags >= Just SSE3 || isAvxEnabled dflags
@@ -1705,11 +1706,14 @@ We handle this as follows:
-- -----------------------------------------------------------------------------
-- LA664
+-- See Note [Keeping enabledCpuFeatures in sync] in GHC.Driver.Session
+
isLa664Enabled :: DynFlags -> Bool
isLa664Enabled dflags = la664 dflags
-- -----------------------------------------------------------------------------
-- BMI2
+-- See Note [Keeping enabledCpuFeatures in sync] in GHC.Driver.Session
isBmiEnabled :: DynFlags -> Bool
isBmiEnabled dflags = case platformArch (targetPlatform dflags) of
=====================================
compiler/GHC/Driver/Session.hs
=====================================
@@ -196,6 +196,8 @@ module GHC.Driver.Session (
-- * Compiler configuration suitable for display to the user
compilerInfo,
+ showEnabledCpuFeatures,
+ enabledCpuFeatures,
targetHasRTSWays,
@@ -277,6 +279,7 @@ import GHC.Utils.TmpFs
import GHC.Utils.Fingerprint
import GHC.Utils.Outputable
import GHC.Utils.Error (emptyDiagOpts, logInfo)
+import GHC.Utils.Json
import GHC.Settings
import GHC.CmmToAsm.CFG.Weight
import GHC.Core.Opt.CallerCC
@@ -3677,6 +3680,132 @@ compilerInfo dflags
queryCmdMaybe p f = expandDirectories (query (maybe "" (prgPath . p) . f))
queryFlagsMaybe p f = query (maybe "" (unwords . map escapeArg . prgFlags . p) . f)
+showEnabledCpuFeatures :: DynFlags -> String
+showEnabledCpuFeatures dflags = showSDocUnsafe $ renderJSON $ JSObject
+ [ ("tag", JSString "enabled-cpu-features")
+ -- Schema version of this JSON object; bump it whenever the shape or
+ -- meaning of the fields changes, so consumers can detect incompatibility.
+ , ("version", JSInt 1)
+ , ("target", JSString (platformMisc_targetPlatformString (platformMisc dflags)))
+ , ("features", JSArray (map JSString features))
+ -- A set of `-m...` flags that, passed to GHC for this target, reproduce
+ -- the effective feature set above. Note this need not be the flags the
+ -- user actually passed: implied features are folded in, and a feature
+ -- enabled by default may be reproduced by the empty set.
+ , ("as_m_flags", JSArray (map JSString asMFlags))
+ ]
+ where
+ (features, asMFlags) = enabledCpuFeatures dflags
+
+{- Note [Keeping enabledCpuFeatures in sync]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+`enabledCpuFeatures` must be updated whenever a new CPU feature flag is added
+to GHC. The three places to touch are, all in GHC.Driver.DynFlags:
+
+ 1. The flag registration (e.g. `make_ord_flag defGhcFlag "mnewfeat" ...`)
+ 2. The corresponding `is*Enabled` predicate
+ 3. The `enabledCpuFeatures` function below — add the feature to `features`
+ and, if it has a GHC `-m...` flag, to `as_m_flags` via the appropriate
+ architecture branch.
+
+See Note [Implications between X86 CPU feature flags] in GHC.Driver.DynFlags
+for the implication structure that `x86FeaturesAndFlags` and `x86AsMFlags`
+must respect.
+-}
+
+enabledCpuFeatures :: DynFlags -> ([String], [String])
+enabledCpuFeatures dflags = case platformArch (targetPlatform dflags) of
+ ArchX86_64 -> x86FeaturesAndFlags dflags
+ ArchX86 -> x86FeaturesAndFlags dflags
+ ArchLoongArch64 ->
+ ( fmaFeature ++ [ "LA664" | isLa664Enabled dflags ]
+ , fmaFlag ++ [ "-mla664" | isLa664Enabled dflags ]
+ )
+ _ -> (fmaFeature, fmaFlag)
+ where
+ -- `-mfma` is a cross-platform flag. On x86 it is folded into the
+ -- SSE/AVX hierarchy (handled in x86FeaturesAndFlags); on every other
+ -- architecture FMA stands on its own and gates FMA codegen via
+ -- isFmaEnabled in stgToCmmAllowFMAInstr. `fma dflags` is the source of
+ -- truth (it defaults to True on AArch64).
+ fmaFeature = [ "FMA" | fma dflags ]
+ fmaFlag = [ "-mfma" | fma dflags ]
+
+x86FeaturesAndFlags :: DynFlags -> ([String], [String])
+x86FeaturesAndFlags dflags =
+ -- SSE/SSE2 are determined by the target platform rather than a dynamic
+ -- flag, hence those predicates take Platform while the others take DynFlags.
+ ( [ "SSE" | isSseEnabled platform ]
+ ++ [ "SSE2" | isSse2Enabled platform ]
+ ++ [ "SSE3" | isSse3Enabled dflags ]
+ ++ [ "SSSE3" | isSsse3Enabled dflags ]
+ ++ [ "SSE4.1" | isSse4_1Enabled dflags ]
+ ++ [ "SSE4.2" | isSse4_2Enabled dflags ]
+ ++ [ "AVX" | isAvxEnabled dflags ]
+ ++ [ "AVX2" | isAvx2Enabled dflags ]
+ ++ [ "AVX512F" | isAvx512fEnabled dflags ]
+ ++ [ "AVX512BW" | isAvx512bwEnabled dflags ]
+ ++ [ "AVX512CD" | isAvx512cdEnabled dflags ]
+ ++ [ "AVX512DQ" | isAvx512dqEnabled dflags ]
+ ++ [ "AVX512ER" | isAvx512erEnabled dflags ]
+ ++ [ "AVX512PF" | isAvx512pfEnabled dflags ]
+ ++ [ "AVX512VL" | isAvx512vlEnabled dflags ]
+ ++ [ "BMI1" | isBmiEnabled dflags ]
+ ++ [ "BMI2" | isBmi2Enabled dflags ]
+ ++ [ "FMA" | isFmaEnabled dflags ]
+ ++ [ "GFNI" | isGfniEnabled dflags ]
+ , x86AsMFlags dflags
+ )
+ where
+ platform = targetPlatform dflags
+
+x86AsMFlags :: DynFlags -> [String]
+x86AsMFlags dflags =
+ avx512Flags
+ ++ vectorFlags
+ ++ bmiFlags
+ ++ fmaFlags
+ ++ gfniFlags
+ where
+ avx512Extensions =
+ [ ("-mavx512bw", avx512bw dflags)
+ , ("-mavx512cd", avx512cd dflags)
+ , ("-mavx512dq", avx512dq dflags)
+ , ("-mavx512er", avx512er dflags)
+ , ("-mavx512pf", avx512pf dflags)
+ , ("-mavx512vl", avx512vl dflags)
+ ]
+
+ hasAvx512Extension = any snd avx512Extensions
+ hasAvx512 = avx512f dflags || hasAvx512Extension
+
+ avx512Flags =
+ [ "-mavx512f" | avx512f dflags && not hasAvx512Extension ]
+ ++ [ flag | (flag, True) <- avx512Extensions ]
+
+ vectorFlags
+ | hasAvx512 = []
+ | otherwise =
+ case sseAvxVersion dflags of
+ Just AVX2 -> ["-mavx2"]
+ Just AVX1 -> ["-mavx"]
+ Just SSE42 -> ["-msse4.2"]
+ Just SSE4 -> ["-msse4"]
+ Just SSSE3 -> ["-mssse3"]
+ Just SSE3 -> ["-msse3"]
+ _ -> []
+
+ bmiFlags = case bmiVersion dflags of
+ Just BMI2 -> ["-mbmi2"]
+ Just BMI1 -> ["-mbmi"]
+ Nothing -> []
+
+ fmaFlags
+ | fma dflags && not hasAvx512 = ["-mfma"]
+ | otherwise = []
+
+ gfniFlags = [ "-mgfni" | gfni dflags ]
+
-- | Query if the target RTS has the given 'Ways'. It's computed from
-- the @"RTS ways"@ field in the settings file.
targetHasRTSWays :: DynFlags -> Ways -> Bool
=====================================
docs/users_guide/using.rst
=====================================
@@ -488,6 +488,16 @@ The available mode flags are:
List the flags passed to the C compiler for the linking step
during GHC build.
+.. ghc-flag:: --print-enabled-cpu-features
+ :shortdesc: display the effective enabled CPU features for code generation
+ :type: mode
+ :category: modes
+
+ Print a JSON object describing the CPU features currently enabled for code
+ generation, together with a set of ``-m...`` flags that reproduce the
+ effective feature set for the current target.
+ Dynamic options such as ``-mavx2`` and ``-mbmi2`` are respected.
+
.. ghc-flag:: --print-debug-on
:shortdesc: print whether GHC was built with ``-DDEBUG``
:type: mode
=====================================
ghc/GHC/Driver/Session/Lint.hs
=====================================
@@ -1,6 +1,6 @@
{-# LANGUAGE CPP #-}
{-# LANGUAGE NondecreasingIndentation #-}
-module GHC.Driver.Session.Lint (checkOptions) where
+module GHC.Driver.Session.Lint (checkOptions, unknownFlagsErr) where
import GHC.Driver.Backend
import GHC.Driver.Phases
=====================================
ghc/GHC/Driver/Session/Mode.hs
=====================================
@@ -77,6 +77,7 @@ isShowGhciUsageMode _ = False
data PostLoadMode
= ShowInterface FilePath -- ghc --show-iface
+ | PrintEnabledCpuFeatures -- ghc --print-enabled-cpu-features
| DoMkDependHS -- ghc -M
| StopBefore StopPhase -- ghc -E | -C | -S
-- StopBefore StopLn is the default
@@ -90,12 +91,13 @@ data PostLoadMode
| DoFrontend ModuleName -- ghc --frontend Plugin.Module
doMkDependHSMode, doMakeMode, doInteractiveMode, doRunMode,
- doAbiHashMode, showUnitsMode :: Mode
+ doAbiHashMode, printEnabledCpuFeaturesMode, showUnitsMode :: Mode
doMkDependHSMode = mkPostLoadMode DoMkDependHS
doMakeMode = mkPostLoadMode DoMake
doInteractiveMode = mkPostLoadMode DoInteractive
doRunMode = mkPostLoadMode DoRun
doAbiHashMode = mkPostLoadMode DoAbiHash
+printEnabledCpuFeaturesMode = mkPostLoadMode PrintEnabledCpuFeatures
showUnitsMode = mkPostLoadMode ShowPackages
showInterfaceMode :: FilePath -> Mode
@@ -203,6 +205,8 @@ mode_flags =
, defFlag "-show-options" (PassFlag (setMode showOptionsMode))
, defFlag "-supported-languages" (PassFlag (setMode showSupportedExtensionsMode))
, defFlag "-supported-extensions" (PassFlag (setMode showSupportedExtensionsMode))
+ , defFlag "-print-enabled-cpu-features"
+ (PassFlag (setMode printEnabledCpuFeaturesMode))
, defFlag "-show-packages" (PassFlag (setMode showUnitsMode))
] ++
[ defFlag k' (PassFlag (setMode (printSetting k)))
=====================================
ghc/Main.hs
=====================================
@@ -229,55 +229,64 @@ main' postLoadMode units dflags0 args flagWarnings = do
liftIO $ exitWith (ExitFailure 1)) $ do
liftIO $ printOrThrowDiagnostics logger4 (initPrintConfig dflags4) diag_opts flagWarnings'
- liftIO $ showBanner postLoadMode dflags4
-
- let (dflags5, srcs, objs) = parseTargetFiles dflags4 (map unLoc fileish_args)
-
- -- we've finished manipulating the DynFlags, update the session
- _ <- GHC.setSessionDynFlags dflags5
- dflags6 <- GHC.getSessionDynFlags
-
- -- Must do this before loading plugins
- liftIO $ initUniqSupply (initialUnique dflags6) (uniqueIncrement dflags6)
-
- -- Initialise plugins here because the plugin author might already expect this
- -- subsequent call to `getLogger` to be affected by a plugin.
- initializeSessionPlugins
- hsc_env <- getSession
- logger <- getLogger
-
-
- ---------------- Display configuration -----------
- case verbosity dflags6 of
- v | v == 4 -> liftIO $ dumpUnitsSimple hsc_env
- | v >= 5 -> liftIO $ dumpUnits hsc_env
- | otherwise -> return ()
-
- ---------------- Final sanity checking -----------
- liftIO $ checkOptions postLoadMode dflags6 srcs objs units
-
- ---------------- Do the business -----------
- handleSourceError (\e -> do
- GHC.printException e
- liftIO $ exitWith (ExitFailure 1)) $ do
- case postLoadMode of
- ShowInterface f -> liftIO $ showIface logger
- (hsc_dflags hsc_env)
- (hsc_units hsc_env)
- (hsc_NC hsc_env)
- f
- DoMake -> doMake units srcs
- DoMkDependHS -> doMkDependHS (map fst srcs)
- StopBefore p -> liftIO (oneShot hsc_env p srcs)
- DoInteractive -> ghciUI units srcs Nothing
- DoEval exprs -> ghciUI units srcs $ Just $ reverse exprs
- DoRun -> doRun units srcs args
- DoAbiHash -> abiHash (map fst srcs)
- ShowPackages -> liftIO $ showUnits hsc_env
- DoFrontend f -> doFrontend f srcs
- DoBackpack -> doBackpack (map fst srcs)
-
- liftIO $ dumpFinalStats logger
+ case postLoadMode of
+ PrintEnabledCpuFeatures -> liftIO $ do
+ -- This mode bypasses parseTargetFiles/checkOptions, so reject any
+ -- leftover flag-like arguments (e.g. a mistyped -mavx22) ourselves;
+ -- otherwise the typo would be silently ignored.
+ let unknown_opts = [ f | f@('-':_) <- map unLoc fileish_args ]
+ when (not (null unknown_opts)) (unknownFlagsErr unknown_opts)
+ putStrLn (showEnabledCpuFeatures dflags4)
+ _ -> do
+ liftIO $ showBanner postLoadMode dflags4
+
+ let (dflags5, srcs, objs) = parseTargetFiles dflags4 (map unLoc fileish_args)
+
+ -- we've finished manipulating the DynFlags, update the session
+ _ <- GHC.setSessionDynFlags dflags5
+ dflags6 <- GHC.getSessionDynFlags
+
+ -- Must do this before loading plugins
+ liftIO $ initUniqSupply (initialUnique dflags6) (uniqueIncrement dflags6)
+
+ -- Initialise plugins here because the plugin author might already expect this
+ -- subsequent call to `getLogger` to be affected by a plugin.
+ initializeSessionPlugins
+ hsc_env <- getSession
+ logger <- getLogger
+
+
+ ---------------- Display configuration -----------
+ case verbosity dflags6 of
+ v | v == 4 -> liftIO $ dumpUnitsSimple hsc_env
+ | v >= 5 -> liftIO $ dumpUnits hsc_env
+ | otherwise -> return ()
+
+ ---------------- Final sanity checking -----------
+ liftIO $ checkOptions postLoadMode dflags6 srcs objs units
+
+ ---------------- Do the business -----------
+ handleSourceError (\e -> do
+ GHC.printException e
+ liftIO $ exitWith (ExitFailure 1)) $ do
+ case postLoadMode of
+ ShowInterface f -> liftIO $ showIface logger
+ (hsc_dflags hsc_env)
+ (hsc_units hsc_env)
+ (hsc_NC hsc_env)
+ f
+ DoMake -> doMake units srcs
+ DoMkDependHS -> doMkDependHS (map fst srcs)
+ StopBefore p -> liftIO (oneShot hsc_env p srcs)
+ DoInteractive -> ghciUI units srcs Nothing
+ DoEval exprs -> ghciUI units srcs $ Just $ reverse exprs
+ DoRun -> doRun units srcs args
+ DoAbiHash -> abiHash (map fst srcs)
+ ShowPackages -> liftIO $ showUnits hsc_env
+ DoFrontend f -> doFrontend f srcs
+ DoBackpack -> doBackpack (map fst srcs)
+
+ liftIO $ dumpFinalStats logger
doRun :: [String] -> [(FilePath, Maybe Phase)] -> [Located String] -> Ghc ()
doRun units srcs args = do
@@ -515,4 +524,3 @@ abiHash strs = do
f <- fingerprintBinMem bh
putStrLn (showPpr dflags f)
-
=====================================
testsuite/tests/driver/all.T
=====================================
@@ -1,3 +1,12 @@
+def normalise_enabled_cpu_target(msg):
+ return re.sub(r'"target":"[^"]+"', '"target":"TARGET"', msg)
+
+def normalise_unknown_flag(msg):
+ # Keep only the stable 'unrecognised flag' line; the program-name prefix,
+ # the suggestion list, and the usage trailer vary across configurations.
+ m = re.search(r'unrecognised flag: \S+', msg)
+ return m.group(0) + '\n' if m else msg
+
test('driver011', [extra_files(['A011.hs'])], makefile_test, ['test011'])
test('driver012', [extra_files(['A012.hs'])], makefile_test, ['test012'])
@@ -221,6 +230,41 @@ test('T9938B', [], makefile_test, [])
test('T9963', exit_code(1), run_command,
['{compiler} --interactive -ignore-dot-ghci --print-libdir'])
+test('print_enabled_cpu_features',
+ [unless(arch('x86_64') or arch('i386'), skip),
+ normalise_fun(normalise_enabled_cpu_target)],
+ run_command,
+ ['{compiler} --print-enabled-cpu-features'])
+
+test('print_enabled_cpu_features_avx2',
+ [unless(arch('x86_64') or arch('i386'), skip),
+ normalise_fun(normalise_enabled_cpu_target)],
+ run_command,
+ ['{compiler} -mavx2 --print-enabled-cpu-features'])
+
+test('print_enabled_cpu_features_bmi2',
+ [unless(arch('x86_64') or arch('i386'), skip),
+ normalise_fun(normalise_enabled_cpu_target)],
+ run_command,
+ ['{compiler} -mbmi2 --print-enabled-cpu-features'])
+
+test('print_enabled_cpu_features_fma',
+ [unless(arch('x86_64') or arch('i386'), skip),
+ normalise_fun(normalise_enabled_cpu_target)],
+ run_command,
+ ['{compiler} -mfma --print-enabled-cpu-features'])
+
+test('print_enabled_cpu_features_avx512',
+ [unless(arch('x86_64'), skip),
+ normalise_fun(normalise_enabled_cpu_target)],
+ run_command,
+ ['{compiler} -mavx512dq -mavx512vl --print-enabled-cpu-features'])
+
+test('print_enabled_cpu_features_unknown_flag',
+ [normalise_fun(normalise_unknown_flag), exit_code(1)],
+ run_command,
+ ['{compiler} -mavx22 --print-enabled-cpu-features'])
+
test('T10219', normal, run_command,
# `-x hspp` in make mode should work.
# Note: need to specify `-x hspp` before the filename.
=====================================
testsuite/tests/driver/print_enabled_cpu_features.stdout
=====================================
@@ -0,0 +1 @@
+{"tag":"enabled-cpu-features","version":1,"target":"TARGET","features":["SSE","SSE2"],"as_m_flags":[]}
=====================================
testsuite/tests/driver/print_enabled_cpu_features_avx2.stdout
=====================================
@@ -0,0 +1 @@
+{"tag":"enabled-cpu-features","version":1,"target":"TARGET","features":["SSE","SSE2","SSE3","SSSE3","SSE4.1","SSE4.2","AVX","AVX2"],"as_m_flags":["-mavx2"]}
=====================================
testsuite/tests/driver/print_enabled_cpu_features_avx512.stdout
=====================================
@@ -0,0 +1 @@
+{"tag":"enabled-cpu-features","version":1,"target":"TARGET","features":["SSE","SSE2","SSE3","SSSE3","SSE4.1","SSE4.2","AVX","AVX2","AVX512F","AVX512DQ","AVX512VL","FMA"],"as_m_flags":["-mavx512dq","-mavx512vl"]}
=====================================
testsuite/tests/driver/print_enabled_cpu_features_bmi2.stdout
=====================================
@@ -0,0 +1 @@
+{"tag":"enabled-cpu-features","version":1,"target":"TARGET","features":["SSE","SSE2","BMI1","BMI2"],"as_m_flags":["-mbmi2"]}
=====================================
testsuite/tests/driver/print_enabled_cpu_features_fma.stdout
=====================================
@@ -0,0 +1 @@
+{"tag":"enabled-cpu-features","version":1,"target":"TARGET","features":["SSE","SSE2","SSE3","SSSE3","SSE4.1","SSE4.2","AVX","FMA"],"as_m_flags":["-mfma"]}
=====================================
testsuite/tests/driver/print_enabled_cpu_features_unknown_flag.stderr
=====================================
@@ -0,0 +1,6 @@
+ghc: unrecognised flag: -mavx22
+did you mean one of:
+ -mavx2
+ -mavx
+
+Usage: For basic information, try the `--help' option.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/d177606f4cdbbf63a6d6ed7cc19815d…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/d177606f4cdbbf63a6d6ed7cc19815d…
You're receiving this email because of your account on gitlab.haskell.org.
1
0
[Git][ghc/ghc][wip/sjakobi/T25450-print-cpu] Add --print-enabled-cpu-features flag
by Simon Jakobi (＠sjakobi2) 01 Jun '26
by Simon Jakobi (＠sjakobi2) 01 Jun '26
01 Jun '26
Simon Jakobi pushed to branch wip/sjakobi/T25450-print-cpu at Glasgow Haskell Compiler / GHC
Commits:
9af6e598 by Simon Jakobi at 2026-06-01T22:45:12+02:00
Add --print-enabled-cpu-features flag
GHC now supports a new mode flag --print-enabled-cpu-features, which
prints a JSON object describing the CPU features currently enabled for
code generation, together with a set of -m... flags that reproduce the
effective feature set for the current target. Dynamic options such as
-mavx2 and -mbmi2 are respected.
$ ghc -mavx2 --print-enabled-cpu-features
{"tag":"enabled-cpu-features","version":1,"target":"x86_64-linux-gnu",
"features":["SSE2","SSE3","SSSE3","SSE4.1","SSE4.2","AVX","AVX2"],
"as_m_flags":["-mavx2"]}
The primary purpose of this flag is for testing the -march=native option
(#25450).
Assisted-by:
- - - - -
14 changed files:
- + changelog.d/print-enabled-cpu-features
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Session.hs
- docs/users_guide/using.rst
- ghc/GHC/Driver/Session/Lint.hs
- ghc/GHC/Driver/Session/Mode.hs
- ghc/Main.hs
- testsuite/tests/driver/all.T
- + testsuite/tests/driver/print_enabled_cpu_features.stdout
- + testsuite/tests/driver/print_enabled_cpu_features_avx2.stdout
- + testsuite/tests/driver/print_enabled_cpu_features_avx512.stdout
- + testsuite/tests/driver/print_enabled_cpu_features_bmi2.stdout
- + testsuite/tests/driver/print_enabled_cpu_features_fma.stdout
- + testsuite/tests/driver/print_enabled_cpu_features_unknown_flag.stderr
Changes:
=====================================
changelog.d/print-enabled-cpu-features
=====================================
@@ -0,0 +1,16 @@
+section: compiler
+synopsis: Add --print-enabled-cpu-features flag
+issues: #25450
+mrs: !16117
+
+description:
+ GHC now supports a new mode flag ``--print-enabled-cpu-features``, which
+ prints a JSON object describing the CPU features currently enabled for code
+ generation, together with a set of ``-m...`` flags that reproduce the
+ effective feature set for the current target.
+ Dynamic options such as ``-mavx2`` and ``-mbmi2`` are respected. ::
+
+ $ ghc -mavx2 --print-enabled-cpu-features
+ {"tag":"enabled-cpu-features","version":1,"target":"x86_64-linux-gnu",
+ "features":["SSE","SSE2","SSE3","SSSE3","SSE4.1","SSE4.2","AVX","AVX2"],
+ "as_m_flags":["-mavx2"]}
=====================================
compiler/GHC/Driver/DynFlags.hs
=====================================
@@ -1615,6 +1615,7 @@ initPromotionTickContext dflags =
-- -----------------------------------------------------------------------------
-- SSE, AVX, FMA
+-- See Note [Keeping enabledCpuFeatures in sync] in GHC.Driver.Session
isSse3Enabled :: DynFlags -> Bool
isSse3Enabled dflags = sseAvxVersion dflags >= Just SSE3 || isAvxEnabled dflags
@@ -1705,11 +1706,14 @@ We handle this as follows:
-- -----------------------------------------------------------------------------
-- LA664
+-- See Note [Keeping enabledCpuFeatures in sync] in GHC.Driver.Session
+
isLa664Enabled :: DynFlags -> Bool
isLa664Enabled dflags = la664 dflags
-- -----------------------------------------------------------------------------
-- BMI2
+-- See Note [Keeping enabledCpuFeatures in sync] in GHC.Driver.Session
isBmiEnabled :: DynFlags -> Bool
isBmiEnabled dflags = case platformArch (targetPlatform dflags) of
=====================================
compiler/GHC/Driver/Session.hs
=====================================
@@ -196,6 +196,8 @@ module GHC.Driver.Session (
-- * Compiler configuration suitable for display to the user
compilerInfo,
+ showEnabledCpuFeatures,
+ enabledCpuFeatures,
targetHasRTSWays,
@@ -277,6 +279,7 @@ import GHC.Utils.TmpFs
import GHC.Utils.Fingerprint
import GHC.Utils.Outputable
import GHC.Utils.Error (emptyDiagOpts, logInfo)
+import GHC.Utils.Json
import GHC.Settings
import GHC.CmmToAsm.CFG.Weight
import GHC.Core.Opt.CallerCC
@@ -3677,6 +3680,132 @@ compilerInfo dflags
queryCmdMaybe p f = expandDirectories (query (maybe "" (prgPath . p) . f))
queryFlagsMaybe p f = query (maybe "" (unwords . map escapeArg . prgFlags . p) . f)
+showEnabledCpuFeatures :: DynFlags -> String
+showEnabledCpuFeatures dflags = showSDocUnsafe $ renderJSON $ JSObject
+ [ ("tag", JSString "enabled-cpu-features")
+ -- Schema version of this JSON object; bump it whenever the shape or
+ -- meaning of the fields changes, so consumers can detect incompatibility.
+ , ("version", JSInt 1)
+ , ("target", JSString (platformMisc_targetPlatformString (platformMisc dflags)))
+ , ("features", JSArray (map JSString features))
+ -- A set of `-m...` flags that, passed to GHC for this target, reproduce
+ -- the effective feature set above. Note this need not be the flags the
+ -- user actually passed: implied features are folded in, and a feature
+ -- enabled by default may be reproduced by the empty set.
+ , ("as_m_flags", JSArray (map JSString asMFlags))
+ ]
+ where
+ (features, asMFlags) = enabledCpuFeatures dflags
+
+{- Note [Keeping enabledCpuFeatures in sync]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+`enabledCpuFeatures` must be updated whenever a new CPU feature flag is added
+to GHC. The three places to touch are, all in GHC.Driver.DynFlags:
+
+ 1. The flag registration (e.g. `make_ord_flag defGhcFlag "mnewfeat" ...`)
+ 2. The corresponding `is*Enabled` predicate
+ 3. The `enabledCpuFeatures` function below — add the feature to `features`
+ and, if it has a GHC `-m...` flag, to `as_m_flags` via the appropriate
+ architecture branch.
+
+See Note [Implications between X86 CPU feature flags] in GHC.Driver.DynFlags
+for the implication structure that `x86FeaturesAndFlags` and `x86AsMFlags`
+must respect.
+-}
+
+enabledCpuFeatures :: DynFlags -> ([String], [String])
+enabledCpuFeatures dflags = case platformArch (targetPlatform dflags) of
+ ArchX86_64 -> x86FeaturesAndFlags dflags
+ ArchX86 -> x86FeaturesAndFlags dflags
+ ArchLoongArch64 ->
+ ( fmaFeature ++ [ "LA664" | isLa664Enabled dflags ]
+ , fmaFlag ++ [ "-mla664" | isLa664Enabled dflags ]
+ )
+ _ -> (fmaFeature, fmaFlag)
+ where
+ -- `-mfma` is a cross-platform flag. On x86 it is folded into the
+ -- SSE/AVX hierarchy (handled in x86FeaturesAndFlags); on every other
+ -- architecture FMA stands on its own and gates FMA codegen via
+ -- isFmaEnabled in stgToCmmAllowFMAInstr. `fma dflags` is the source of
+ -- truth (it defaults to True on AArch64).
+ fmaFeature = [ "FMA" | fma dflags ]
+ fmaFlag = [ "-mfma" | fma dflags ]
+
+x86FeaturesAndFlags :: DynFlags -> ([String], [String])
+x86FeaturesAndFlags dflags =
+ -- SSE/SSE2 are determined by the target platform rather than a dynamic
+ -- flag, hence those predicates take Platform while the others take DynFlags.
+ ( [ "SSE" | isSseEnabled platform ]
+ ++ [ "SSE2" | isSse2Enabled platform ]
+ ++ [ "SSE3" | isSse3Enabled dflags ]
+ ++ [ "SSSE3" | isSsse3Enabled dflags ]
+ ++ [ "SSE4.1" | isSse4_1Enabled dflags ]
+ ++ [ "SSE4.2" | isSse4_2Enabled dflags ]
+ ++ [ "AVX" | isAvxEnabled dflags ]
+ ++ [ "AVX2" | isAvx2Enabled dflags ]
+ ++ [ "AVX512F" | isAvx512fEnabled dflags ]
+ ++ [ "AVX512BW" | isAvx512bwEnabled dflags ]
+ ++ [ "AVX512CD" | isAvx512cdEnabled dflags ]
+ ++ [ "AVX512DQ" | isAvx512dqEnabled dflags ]
+ ++ [ "AVX512ER" | isAvx512erEnabled dflags ]
+ ++ [ "AVX512PF" | isAvx512pfEnabled dflags ]
+ ++ [ "AVX512VL" | isAvx512vlEnabled dflags ]
+ ++ [ "BMI1" | isBmiEnabled dflags ]
+ ++ [ "BMI2" | isBmi2Enabled dflags ]
+ ++ [ "FMA" | isFmaEnabled dflags ]
+ ++ [ "GFNI" | isGfniEnabled dflags ]
+ , x86AsMFlags dflags
+ )
+ where
+ platform = targetPlatform dflags
+
+x86AsMFlags :: DynFlags -> [String]
+x86AsMFlags dflags =
+ avx512Flags
+ ++ vectorFlags
+ ++ bmiFlags
+ ++ fmaFlags
+ ++ gfniFlags
+ where
+ avx512Extensions =
+ [ ("-mavx512bw", avx512bw dflags)
+ , ("-mavx512cd", avx512cd dflags)
+ , ("-mavx512dq", avx512dq dflags)
+ , ("-mavx512er", avx512er dflags)
+ , ("-mavx512pf", avx512pf dflags)
+ , ("-mavx512vl", avx512vl dflags)
+ ]
+
+ hasAvx512Extension = any snd avx512Extensions
+ hasAvx512 = avx512f dflags || hasAvx512Extension
+
+ avx512Flags =
+ [ "-mavx512f" | avx512f dflags && not hasAvx512Extension ]
+ ++ [ flag | (flag, True) <- avx512Extensions ]
+
+ vectorFlags
+ | hasAvx512 = []
+ | otherwise =
+ case sseAvxVersion dflags of
+ Just AVX2 -> ["-mavx2"]
+ Just AVX1 -> ["-mavx"]
+ Just SSE42 -> ["-msse4.2"]
+ Just SSE4 -> ["-msse4"]
+ Just SSSE3 -> ["-mssse3"]
+ Just SSE3 -> ["-msse3"]
+ _ -> []
+
+ bmiFlags = case bmiVersion dflags of
+ Just BMI2 -> ["-mbmi2"]
+ Just BMI1 -> ["-mbmi"]
+ Nothing -> []
+
+ fmaFlags
+ | fma dflags && not hasAvx512 = ["-mfma"]
+ | otherwise = []
+
+ gfniFlags = [ "-mgfni" | gfni dflags ]
+
-- | Query if the target RTS has the given 'Ways'. It's computed from
-- the @"RTS ways"@ field in the settings file.
targetHasRTSWays :: DynFlags -> Ways -> Bool
=====================================
docs/users_guide/using.rst
=====================================
@@ -488,6 +488,16 @@ The available mode flags are:
List the flags passed to the C compiler for the linking step
during GHC build.
+.. ghc-flag:: --print-enabled-cpu-features
+ :shortdesc: display the effective enabled CPU features for code generation
+ :type: mode
+ :category: modes
+
+ Print a JSON object describing the CPU features currently enabled for code
+ generation, together with a set of ``-m...`` flags that reproduce the
+ effective feature set for the current target.
+ Dynamic options such as ``-mavx2`` and ``-mbmi2`` are respected.
+
.. ghc-flag:: --print-debug-on
:shortdesc: print whether GHC was built with ``-DDEBUG``
:type: mode
=====================================
ghc/GHC/Driver/Session/Lint.hs
=====================================
@@ -1,6 +1,6 @@
{-# LANGUAGE CPP #-}
{-# LANGUAGE NondecreasingIndentation #-}
-module GHC.Driver.Session.Lint (checkOptions) where
+module GHC.Driver.Session.Lint (checkOptions, unknownFlagsErr) where
import GHC.Driver.Backend
import GHC.Driver.Phases
=====================================
ghc/GHC/Driver/Session/Mode.hs
=====================================
@@ -77,6 +77,7 @@ isShowGhciUsageMode _ = False
data PostLoadMode
= ShowInterface FilePath -- ghc --show-iface
+ | PrintEnabledCpuFeatures -- ghc --print-enabled-cpu-features
| DoMkDependHS -- ghc -M
| StopBefore StopPhase -- ghc -E | -C | -S
-- StopBefore StopLn is the default
@@ -90,12 +91,13 @@ data PostLoadMode
| DoFrontend ModuleName -- ghc --frontend Plugin.Module
doMkDependHSMode, doMakeMode, doInteractiveMode, doRunMode,
- doAbiHashMode, showUnitsMode :: Mode
+ doAbiHashMode, printEnabledCpuFeaturesMode, showUnitsMode :: Mode
doMkDependHSMode = mkPostLoadMode DoMkDependHS
doMakeMode = mkPostLoadMode DoMake
doInteractiveMode = mkPostLoadMode DoInteractive
doRunMode = mkPostLoadMode DoRun
doAbiHashMode = mkPostLoadMode DoAbiHash
+printEnabledCpuFeaturesMode = mkPostLoadMode PrintEnabledCpuFeatures
showUnitsMode = mkPostLoadMode ShowPackages
showInterfaceMode :: FilePath -> Mode
@@ -203,6 +205,8 @@ mode_flags =
, defFlag "-show-options" (PassFlag (setMode showOptionsMode))
, defFlag "-supported-languages" (PassFlag (setMode showSupportedExtensionsMode))
, defFlag "-supported-extensions" (PassFlag (setMode showSupportedExtensionsMode))
+ , defFlag "-print-enabled-cpu-features"
+ (PassFlag (setMode printEnabledCpuFeaturesMode))
, defFlag "-show-packages" (PassFlag (setMode showUnitsMode))
] ++
[ defFlag k' (PassFlag (setMode (printSetting k)))
=====================================
ghc/Main.hs
=====================================
@@ -229,55 +229,64 @@ main' postLoadMode units dflags0 args flagWarnings = do
liftIO $ exitWith (ExitFailure 1)) $ do
liftIO $ printOrThrowDiagnostics logger4 (initPrintConfig dflags4) diag_opts flagWarnings'
- liftIO $ showBanner postLoadMode dflags4
-
- let (dflags5, srcs, objs) = parseTargetFiles dflags4 (map unLoc fileish_args)
-
- -- we've finished manipulating the DynFlags, update the session
- _ <- GHC.setSessionDynFlags dflags5
- dflags6 <- GHC.getSessionDynFlags
-
- -- Must do this before loading plugins
- liftIO $ initUniqSupply (initialUnique dflags6) (uniqueIncrement dflags6)
-
- -- Initialise plugins here because the plugin author might already expect this
- -- subsequent call to `getLogger` to be affected by a plugin.
- initializeSessionPlugins
- hsc_env <- getSession
- logger <- getLogger
-
-
- ---------------- Display configuration -----------
- case verbosity dflags6 of
- v | v == 4 -> liftIO $ dumpUnitsSimple hsc_env
- | v >= 5 -> liftIO $ dumpUnits hsc_env
- | otherwise -> return ()
-
- ---------------- Final sanity checking -----------
- liftIO $ checkOptions postLoadMode dflags6 srcs objs units
-
- ---------------- Do the business -----------
- handleSourceError (\e -> do
- GHC.printException e
- liftIO $ exitWith (ExitFailure 1)) $ do
- case postLoadMode of
- ShowInterface f -> liftIO $ showIface logger
- (hsc_dflags hsc_env)
- (hsc_units hsc_env)
- (hsc_NC hsc_env)
- f
- DoMake -> doMake units srcs
- DoMkDependHS -> doMkDependHS (map fst srcs)
- StopBefore p -> liftIO (oneShot hsc_env p srcs)
- DoInteractive -> ghciUI units srcs Nothing
- DoEval exprs -> ghciUI units srcs $ Just $ reverse exprs
- DoRun -> doRun units srcs args
- DoAbiHash -> abiHash (map fst srcs)
- ShowPackages -> liftIO $ showUnits hsc_env
- DoFrontend f -> doFrontend f srcs
- DoBackpack -> doBackpack (map fst srcs)
-
- liftIO $ dumpFinalStats logger
+ case postLoadMode of
+ PrintEnabledCpuFeatures -> liftIO $ do
+ -- This mode bypasses parseTargetFiles/checkOptions, so reject any
+ -- leftover flag-like arguments (e.g. a mistyped -mavx22) ourselves;
+ -- otherwise the typo would be silently ignored.
+ let unknown_opts = [ f | f@('-':_) <- map unLoc fileish_args ]
+ when (not (null unknown_opts)) (unknownFlagsErr unknown_opts)
+ putStrLn (showEnabledCpuFeatures dflags4)
+ _ -> do
+ liftIO $ showBanner postLoadMode dflags4
+
+ let (dflags5, srcs, objs) = parseTargetFiles dflags4 (map unLoc fileish_args)
+
+ -- we've finished manipulating the DynFlags, update the session
+ _ <- GHC.setSessionDynFlags dflags5
+ dflags6 <- GHC.getSessionDynFlags
+
+ -- Must do this before loading plugins
+ liftIO $ initUniqSupply (initialUnique dflags6) (uniqueIncrement dflags6)
+
+ -- Initialise plugins here because the plugin author might already expect this
+ -- subsequent call to `getLogger` to be affected by a plugin.
+ initializeSessionPlugins
+ hsc_env <- getSession
+ logger <- getLogger
+
+
+ ---------------- Display configuration -----------
+ case verbosity dflags6 of
+ v | v == 4 -> liftIO $ dumpUnitsSimple hsc_env
+ | v >= 5 -> liftIO $ dumpUnits hsc_env
+ | otherwise -> return ()
+
+ ---------------- Final sanity checking -----------
+ liftIO $ checkOptions postLoadMode dflags6 srcs objs units
+
+ ---------------- Do the business -----------
+ handleSourceError (\e -> do
+ GHC.printException e
+ liftIO $ exitWith (ExitFailure 1)) $ do
+ case postLoadMode of
+ ShowInterface f -> liftIO $ showIface logger
+ (hsc_dflags hsc_env)
+ (hsc_units hsc_env)
+ (hsc_NC hsc_env)
+ f
+ DoMake -> doMake units srcs
+ DoMkDependHS -> doMkDependHS (map fst srcs)
+ StopBefore p -> liftIO (oneShot hsc_env p srcs)
+ DoInteractive -> ghciUI units srcs Nothing
+ DoEval exprs -> ghciUI units srcs $ Just $ reverse exprs
+ DoRun -> doRun units srcs args
+ DoAbiHash -> abiHash (map fst srcs)
+ ShowPackages -> liftIO $ showUnits hsc_env
+ DoFrontend f -> doFrontend f srcs
+ DoBackpack -> doBackpack (map fst srcs)
+
+ liftIO $ dumpFinalStats logger
doRun :: [String] -> [(FilePath, Maybe Phase)] -> [Located String] -> Ghc ()
doRun units srcs args = do
@@ -515,4 +524,3 @@ abiHash strs = do
f <- fingerprintBinMem bh
putStrLn (showPpr dflags f)
-
=====================================
testsuite/tests/driver/all.T
=====================================
@@ -1,3 +1,12 @@
+def normalise_enabled_cpu_target(msg):
+ return re.sub(r'"target":"[^"]+"', '"target":"TARGET"', msg)
+
+def normalise_unknown_flag(msg):
+ # Keep only the stable 'unrecognised flag' line; the program-name prefix,
+ # the suggestion list, and the usage trailer vary across configurations.
+ m = re.search(r'unrecognised flag: \S+', msg)
+ return m.group(0) + '\n' if m else msg
+
test('driver011', [extra_files(['A011.hs'])], makefile_test, ['test011'])
test('driver012', [extra_files(['A012.hs'])], makefile_test, ['test012'])
@@ -221,6 +230,41 @@ test('T9938B', [], makefile_test, [])
test('T9963', exit_code(1), run_command,
['{compiler} --interactive -ignore-dot-ghci --print-libdir'])
+test('print_enabled_cpu_features',
+ [unless(arch('x86_64') or arch('i386'), skip),
+ normalise_fun(normalise_enabled_cpu_target)],
+ run_command,
+ ['{compiler} --print-enabled-cpu-features'])
+
+test('print_enabled_cpu_features_avx2',
+ [unless(arch('x86_64') or arch('i386'), skip),
+ normalise_fun(normalise_enabled_cpu_target)],
+ run_command,
+ ['{compiler} -mavx2 --print-enabled-cpu-features'])
+
+test('print_enabled_cpu_features_bmi2',
+ [unless(arch('x86_64') or arch('i386'), skip),
+ normalise_fun(normalise_enabled_cpu_target)],
+ run_command,
+ ['{compiler} -mbmi2 --print-enabled-cpu-features'])
+
+test('print_enabled_cpu_features_fma',
+ [unless(arch('x86_64') or arch('i386'), skip),
+ normalise_fun(normalise_enabled_cpu_target)],
+ run_command,
+ ['{compiler} -mfma --print-enabled-cpu-features'])
+
+test('print_enabled_cpu_features_avx512',
+ [unless(arch('x86_64'), skip),
+ normalise_fun(normalise_enabled_cpu_target)],
+ run_command,
+ ['{compiler} -mavx512dq -mavx512vl --print-enabled-cpu-features'])
+
+test('print_enabled_cpu_features_unknown_flag',
+ [normalise_fun(normalise_unknown_flag), exit_code(1)],
+ run_command,
+ ['{compiler} -mavx22 --print-enabled-cpu-features'])
+
test('T10219', normal, run_command,
# `-x hspp` in make mode should work.
# Note: need to specify `-x hspp` before the filename.
=====================================
testsuite/tests/driver/print_enabled_cpu_features.stdout
=====================================
@@ -0,0 +1 @@
+{"tag":"enabled-cpu-features","version":1,"target":"TARGET","features":["SSE","SSE2"],"as_m_flags":[]}
=====================================
testsuite/tests/driver/print_enabled_cpu_features_avx2.stdout
=====================================
@@ -0,0 +1 @@
+{"tag":"enabled-cpu-features","version":1,"target":"TARGET","features":["SSE","SSE2","SSE3","SSSE3","SSE4.1","SSE4.2","AVX","AVX2"],"as_m_flags":["-mavx2"]}
=====================================
testsuite/tests/driver/print_enabled_cpu_features_avx512.stdout
=====================================
@@ -0,0 +1 @@
+{"tag":"enabled-cpu-features","version":1,"target":"TARGET","features":["SSE","SSE2","SSE3","SSSE3","SSE4.1","SSE4.2","AVX","AVX2","AVX512F","AVX512DQ","AVX512VL","FMA"],"as_m_flags":["-mavx512dq","-mavx512vl"]}
=====================================
testsuite/tests/driver/print_enabled_cpu_features_bmi2.stdout
=====================================
@@ -0,0 +1 @@
+{"tag":"enabled-cpu-features","version":1,"target":"TARGET","features":["SSE","SSE2","BMI1","BMI2"],"as_m_flags":["-mbmi2"]}
=====================================
testsuite/tests/driver/print_enabled_cpu_features_fma.stdout
=====================================
@@ -0,0 +1 @@
+{"tag":"enabled-cpu-features","version":1,"target":"TARGET","features":["SSE","SSE2","SSE3","SSSE3","SSE4.1","SSE4.2","AVX","FMA"],"as_m_flags":["-mfma"]}
=====================================
testsuite/tests/driver/print_enabled_cpu_features_unknown_flag.stderr
=====================================
@@ -0,0 +1,6 @@
+ghc: unrecognised flag: -mavx22
+did you mean one of:
+ -mavx2
+ -mavx
+
+Usage: For basic information, try the `--help' option.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/9af6e598a33a0b01dc73e4f85f82392…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/9af6e598a33a0b01dc73e4f85f82392…
You're receiving this email because of your account on gitlab.haskell.org.
1
0
[Git][ghc/ghc][wip/fix-26953] 154 commits: Bump directory submodule to 1.3.11.0 (unreleased)
by recursion-ninja (＠recursion-ninja) 01 Jun '26
by recursion-ninja (＠recursion-ninja) 01 Jun '26
01 Jun '26
recursion-ninja pushed to branch wip/fix-26953 at Glasgow Haskell Compiler / GHC
Commits:
b135a87d by Zubin Duggal at 2026-04-09T19:36:50+05:30
Bump directory submodule to 1.3.11.0 (unreleased)
- - - - -
3a291d07 by Zubin Duggal at 2026-04-09T19:36:50+05:30
Bump file-io submodule to 0.2.0
- - - - -
e0ab606d by Zubin Duggal at 2026-04-10T18:40:20+05:30
Release notes for GHC 10.0
- - - - -
e08b9b34 by Zubin Duggal at 2026-04-10T18:40:20+05:30
Bump ghc-prim version to 0.14.0
- - - - -
a92aac6e by Zubin Duggal at 2026-04-10T18:40:20+05:30
Bump template-haskell to 2.25.0.0; update submodule exceptions for TH 2.25
- - - - -
f254d9e8 by Zubin Duggal at 2026-04-10T18:40:20+05:30
Bump GHC version to 10.0
- - - - -
6ce0368a by Zubin Duggal at 2026-04-10T18:40:28+05:30
Bump base to 4.23.0.0; update submodules for base 4.24 upper bound
- - - - -
702fb8a5 by Zubin Duggal at 2026-04-10T18:40:28+05:30
Bump GHC version to 10.1; update submodules template-haskell-lift and template-haskell-quasiquoter for ghc-internal 10.200
- - - - -
75df1ca4 by Zubin Duggal at 2026-04-10T18:40:28+05:30
Use changelog.d for release notes (#26002)
GHC now uses a fragment-based changelog workflow using a custom script adapted from https://codeberg.org/fgaz/changelog-d.
Contributors add a file in changelog.d/ for each user-facing change.
At release time, these are assembled into release notes for sphinx (in RST) format, using
the tool.
New hadrian `changelog` target to generate changelogs
CI job to validate changelog entries for MRs unless skipped with ~"no-changelog" label
Teach sphinx about ghc-mr: extlink to link to MRs
Remove `ghc-package-list` from sphinx, and implement it in changelog-d instead (Fixes #26476).
(cherry picked from commit 989c07249978f418dfde1353abfad453f024d61a)
- - - - -
585d7450 by Luite Stegeman at 2026-04-11T02:17:13-04:00
tc: discard warnings in tcUserStmt Plan C
We typecheck let_stmt twice, but we don't want the warnings twice!
see #26233
- - - - -
2df604e9 by Sylvain Henry at 2026-04-11T02:19:30-04:00
Introduce TargetInt to represent target's Int (#15973)
GHC was using host 'Int' in several places to represent values that
live in the target machine's 'Int' type. This is silently wrong when
cross-compiling from a 32-bit host to a 64-bit target: the host Int
is 32 bits while the target Int is 64 bits.
See Note [TargetInt] in GHC.Platform.
Also used the opportunity to make DynTag = Word8.
Fixes #15973
Co-Authored-By: Claude Sonnet 4.6 <noreply(a)anthropic.com>
- - - - -
d419e972 by Luite Stegeman at 2026-04-13T15:16:04-04:00
Suppress desugaring warnings in the pattern match checker
Avoid duplicating warnings from the actual desugaring pass.
fixes #25996
- - - - -
c5b80dd0 by Phil de Joux at 2026-04-13T15:16:51-04:00
Typo ~/ghc/arch-os-version/environments
- - - - -
71462fff by Luite Stegeman at 2026-04-13T15:17:38-04:00
add changelog entry for #26233
- - - - -
d1ddfd4b by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
Add test for #25636
The existing test behaviour of "T23146_liftedeq" changed because the
simplifier now does a bit more inlining. We can restore the previous bad
behavior by using an OPAQUE pragma.
This test doubles as a test for #25636 when run in ghci, so we add it as
such.
- - - - -
b9df40ee by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
refactor: protoBCOName is always a Name
Simplifies the code by removing the unnecessary type argument to
ProtoBCO which was always 'Name'
- - - - -
5c2a179e by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
Allocate static constructors for bytecode
This commit adds support for static constructors when compiling and
linking ByteCode objects.
Top-level StgRhsCon get lowered to ProtoStaticCons rather than to
ProtoBCOs. A ProtoStaticCon gets allocated directly as a data con
application on the heap (using the new primop newConApp#).
Previously, we would allocate a ProtoBCO which, when evaluated, would
PACK and return the constructor.
A few more details are given in Note [Static constructors in Bytecode].
Secondly, this commit also fixes issue #25636 which was caused by
linking *unlifted* constructors in BCO instructions as
- (1) a thunk indexing the array of BCOs in a module
- (2) which evaluated to a BCO which still had to be evaluated to
return the unlifted constructor proper.
The (2) issue has been resolved by allocating the static constructors
directly. The (1) issue can be resolved by ensuring that we allocate all
unlifted top-level constructors eagerly, and leave the knot-tying for
the lifted BCOs and top-level constructors only.
The top-level unlifted constructors are never mutually recursive, so we
can allocate them all in one go as long as we do it in topological
order. Lifted fields of unlifted constructors can still be filled by the
knot-tied lifted variables since in those fields it is fine to keep
those thunks. See Note [Tying the knot in createBCOs] for more details.
Fixes #25636
-------------------------
Metric Decrease:
LinkableUsage01
-------------------------
- - - - -
cde47053 by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
Revert "StgToByteCode: Assert that PUSH_G'd values are lifted"
This reverts commit ec26c54d818e0cd328276196930313f66b780905.
Ever since f7a22c0f4e9ae0dc767115d4c53fddbd8372b777, we now do support
and will link top-level unlifted constructors into evaluated and
properly tagged values which we can reference with PUSH_G.
This assertion is no longer true and triggered a failure in T25636
- - - - -
c7a7e5b8 by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
refactor: Tag more remote Ptrs as RemotePtr
Pure refactor which improves the API of
- GHC.ByteCode.Linker
- GHC.Runtime.Interpreter
- GHC.Runtime.Interpreter.Types.SymbolCache
by using `RemotePtr` for more functions which used to return `Ptr`s that
could potentially be in a foreign process. E.g. `lookupIE`,
`lookupStaticPtr`, etc...
- - - - -
fc59494c by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
Add float# and subword tests for #25636
These tests cover that static constructors in bytecode work correctly
for Float# and subword values (Word8#, Word16#)
- - - - -
477f521b by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
test: Validate topoSort logic in createBCOs
This test validates that the topological sorting and ordering of the
unlifted constructors and lifted constructors in `createBCOs` is
correct.
See `Note [Tying the knot in createBCOs]` for why tying the knot for the
created BCOs is slightly difficult and why the topological sorting is
necessary.
This test fails when `let topoSortedObjs = topSortObjs objs` is
substituted by `let topoSortedObjs = zip [0..] objs`, thus witnessing
the toposort logic is correct and necessary.
The test calls the ghci `createBCOs` directly because it is currently
impossible to construct in Source Haskell a situation where a top-level
static unlifted constructor depends on another (we don't have top-level
unlifted constructors except for nullary constructors like `Leaf ::
(UTree :: UnliftedType)`).
This is another test for fix for #25636
- - - - -
2d9c30be by Simon Jakobi at 2026-04-14T18:42:00-04:00
Improve tests for `elem`
...in order to simplify the work on #27096.
* Improve T17752 by including the Core output in golden files, checking
both -O1 and -O2.
* Add tests for fusion and no-fusion cases.
Fixes #27101.
- - - - -
2dadf3b0 by sheaf at 2026-04-16T13:28:39-04:00
Simplify mkTick
This commit simplifies 'GHC.Core.Utils.mkTick', removing the
accumulating parameter 'rest' which was suspiciously treating a bunch of
different ticks as a group, and moving the group as a whole around the
AST, ignoring that the ticks in the group might have different placement
properties.
The most important change is that we revert the logic (added in 85b0aae2)
that allowed ticks to be placed around coercions, which caused serious
issues (e.g. #27121). It was just a mistake, as it doesn't make sense
to put a tick around a coercion.
Also adds Note [Pushing SCCs inwards] which clarifies the logic for
pushing SCCs into lambdas, constructor applications, and dropping SCCs
around non-function variables (in particular the treatment of splittable
ticks).
A few other changes are also implemented:
- simplify 'can_split' predicate (no functional change)
- combine profiling ticks into one when possible
Fixes #26878, #26941 and #27121
Co-authored-by: simonpj <simon.peytonjones(a)gmail.com>
- - - - -
a0d6f1f4 by Simon Jakobi at 2026-04-16T13:29:28-04:00
Add regression test for #9074
Closes #9074.
- - - - -
d178ee89 by Sylvain Henry at 2026-04-16T13:30:25-04:00
Add changelog for #15973
- - - - -
e8a196c6 by sheaf at 2026-04-16T13:31:19-04:00
Deal with 'noSpec' in 'coreExprToPmLit'
This commit makes two separate changes relating to
'GHC.HsToCore.Pmc.Solver.Types.coreExprAsPmLit':
1. Commit 7124e4ad mistakenly marked deferred errors as non-canonical,
which led to the introduction of 'nospec' wrappers in the
generated Core. This reverts that accident by declaring deferred
errors as being canonical, avoiding spurious 'nospec' wrapping.
2. Look through magic identity-like Ids such as 'nospec', 'inline' and
'lazy' in 'coreExprAsPmLit', just like Core Prep does.
There might genuinely be incoherent evidence, but that shouldn't
obstruct the pattern match checker. See test T27124a.
Fixes #25926 #27124
-------------------------
Metric Decrease:
T3294
-------------------------
- - - - -
8cb99552 by Sylvain Henry at 2026-04-16T19:22:43-04:00
hadrian: warn when package index is missing (#16484)
Since cabal-install 3.0 we can query the path of remote-repo-cache and
check if hackage package index is present.
Fixes #16484
- - - - -
d6ce7477 by Richard Eisenberg at 2026-04-16T19:23:25-04:00
Teach hadrian to --skip-test.
Fixes #27188.
This adds the --skip-test flag to `hadrian build`, as documented in the
patch.
- - - - -
7666f4a9 by Fendor at 2026-04-17T22:29:51-04:00
Migrate `ghc-pkg` to use `OsPath` and `file-io`
`ghc-pkg` should use UNC paths as much as possible to avoid MAX_PATH
issues on windows.
`file-io` uses UNC Paths by default on windows, ensuring we use the
correct APIs and that we finally are no longer plagued by MAX_PATH
issues in CI and private machines.
On top of it, the higher correctness of `OsPath` is appreciated in this
small codebase. Also, we improve memory usage very slightly, due to the
more efficient memory representation of `OsPath` over `FilePath`
Adds `ghc-pkg` regression test for MAX_PATH on windows
Make sure `ghc-pkg` behaves as expected when long paths (> 255) are
involved on windows.
Let's generate a testcase where we can actually observe that `ghc-pkg`
behaves as epxected.
See the documentation for windows on Maximum Path Length Limitation:
* `https://learn.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation`
Adds changelog entry for long path support in ghc-pkg.
- - - - -
78434e8c by Simon Peyton Jones at 2026-04-17T22:30:38-04:00
Kill off the substitution in Lint
Now that we have invariant (NoTypeShadowing) we no longer
need Lint to carry an ambient substitution. This makes it
simpler and faster. A really worthwhile refactor.
There are some knock-on effects
* Linting join points after worker/wrapper. See
Note [Join points and beta redexes]
* Running a type substitution after the desugarer.
See Note [Substituting type-lets] in
the new module GHC.Core.SubstTypeLets
Implements #27078
Most perf tests don't use Lint so we won't see a perf incresae.
But T1969, which uses -O0 and Lint, gets 1.3% worse because it has
to run the SubstTypeLets pass which is a somewhat expensive no-op
Overall though compile-time allocations are down 0.1%.
Metric Increase:
T1969
- - - - -
86ca6c2c by mangoiv at 2026-04-17T22:31:22-04:00
testsuite: inline elemCoreTest
Some weird (probably python scoping) rule caused elemCoreTest, a regex
being out of scope on ubuntu, presumably because of a newer python version.
This patch just inlines the regex, which fixes the issue.
Fixes #27193
- - - - -
72d6dc74 by aparker at 2026-04-20T20:15:44-04:00
NCG: Implement constant folding for vector simd ops (Issue #25030)
- - - - -
b9cab907 by sheaf at 2026-04-20T20:15:44-04:00
Mark some SIMD tests as broken on i386 optllvm
As seen in #25498, several SIMD tests are broken on i386 in the optllvm
way. This commit marks them as "expect_broken".
- - - - -
76528cc3 by Wolfgang Jeltsch at 2026-04-20T20:16:25-04:00
Move most of the `System.IO` implementation into `base`
This involves a rewrite of the `combine` helper function to avoid the
use of `last`, which would now be flagged as an error.
Metric Decrease:
LinkableUsage01
T3294
Metric Increase:
T12227
T12707
T5642
- - - - -
04d143c0 by Luite Stegeman at 2026-04-21T14:05:33-04:00
rts: add a few missing i386 relocations in the rts linker
- - - - -
014087e7 by Luite Stegeman at 2026-04-21T14:05:34-04:00
CodeOutput: Fix finalizers on multiple platforms
- ELF platforms: emit .fini_array section
- wasm32/Darwin: emit initializer with __cxa_atexit call
- Windows: use -Wl,--whole-archive to prevent dropping finalizer symbols
- rts linker: fix crash/assertion failure unloading objects with finalizers
fixes #27072
- - - - -
915bba6f by Simon Jakobi at 2026-04-21T14:06:16-04:00
Add regression test for #10531
Closes #10531.
- - - - -
86a646a6 by Andreas Klebinger at 2026-04-22T13:00:05-04:00
Revert use of generic instances for compiler time perf reasons.
Revert "Derive Semigroup/Monoid for instances believed could be derived in #25871"
This reverts commit 11a04cbb221cc404fe00d65d7c951558ede4caa9.
Revert "add Ghc.Data.Pair deriving"
This reverts commit 15d9ce449e1be8c01b89fd39bdf1e700ea7d1dce.
- - - - -
bc9ee1cf by Wen Kokke at 2026-04-22T13:00:51-04:00
hadrian: Fix docs to remove static flavour
In 638f6548, the static flavour was turned into into the fully_static
flavour transformer. However, this commit did not update flavours.md.
- - - - -
cc9cc6d5 by Cheng Shao at 2026-04-23T09:40:46+00:00
configure: bump LlvmMaxVersion to 23
This patch bumps `LlvmMaxVersion` to 23 to support LLVM 22.x releases.
- - - - -
2ea7ef8e by Cheng Shao at 2026-04-23T09:46:26+00:00
changelog: add llvm 22.x support
- - - - -
5574ee10 by Cheng Shao at 2026-04-24T08:24:30-04:00
compiler: avoid unused temporary `appendFS` operands
This patch fixes unused temporary `appendFS` operands in the codebase
that are retained in the `FastString` table after concatenation.
Rewrite rules are added so that if an operand is
`fsLit`/`mkFastString`, the `appendFS` application is rewritten to
append the `ShortByteString` operands first. The patch also fixes
`sconcat` behavior to align with `mconcat` for the same reason. Fixes #27205.
- - - - -
4ed78760 by mangoiv at 2026-04-24T08:25:13-04:00
contributing: adjust MR template to be less verbose
- MR template only shows text that is relevant for submissiong
- MR template was rewritten so it's readable from a user's and reviewer's
perspective
Resolves #27165
Co-Authored-By: @sheaf
- - - - -
87db83e2 by Cheng Shao at 2026-04-24T14:37:21-04:00
ci: bump freebsd boot ghc to 9.10.3
This commit bumps freebsd boot ghc to 9.10.3 to align with other
platforms and prevent outdated boot libs in boot ghc to block the
freebsd job.
- - - - -
17e3a0b7 by Cheng Shao at 2026-04-24T14:37:21-04:00
compiler: improve Binary instance of Array
This patch improves the `Binary` instance of `Array`:
- We no longer allocate intermediate lists. When serializing an
`Array`, we iterate over the elements directly; when deserializing
it, we allocate the result `Array` and fill it in a loop.
- Now we only serialize the array bounds tuple; the length field is
not needed.
Closes #27109.
- - - - -
2d30f7d3 by sheaf at 2026-04-24T14:38:23-04:00
Vendor mini-QuickCheck for testsuite
This commit extracts the vendored QuickCheck implementation from the
foundation testsuite to make it more broadly available in the GHC
testsuite, and makes use of it in the simd006 test (which also used
a vendored QuickCheck implementation).
On the way, we update the linear congruential generator to avoid the
shortcoming of only generating 31 bit large numbers.
Fixes #25990 and #25969.
- - - - -
1350271b by sheaf at 2026-04-27T09:32:53-04:00
Ensure TcM plugins are only initialised once
This commit ensures we keep TcM plugins (typechecker plugins,
defaulting plugins and hole fit plugins) running all the way through
desugaring, instead of stopping them at the end of typechecking.
To do this, the "stop" actions of TcPlugin and DefaultingPlugin are
split into two: one for the "post-typecheck" action, and one for the
final shutdown action (after desugaring).
This allows the plugins to be invoked by the pattern match checker
(during desugaring) without having to be repeatedly re-initialised and
stopped, fixing #26839.
In the process, this commit modifies 'initTc' and 'initTcInteractive',
adding an extra argument that describes whether to start/stop the 'TcM'
plugins.
See Note [Stop TcM plugins after desugaring] for an overview.
- - - - -
42549222 by sheaf at 2026-04-27T09:33:50-04:00
Hadrian: add --keep-response-files
This commit adds a Hadrian flag that allows response files to be
retained. This is useful for debugging a failing Hadrian command line.
- - - - -
40564e8d by sheaf at 2026-04-27T09:34:46-04:00
hadrian/build-cabal.bat: fix build on Windows
Commit 8cb99552f6 introduced a warning for a missing package index.
However, the logic was faulty on Windows: the piping was broken, and
"remote-repo-cache:" was being interpreted as a (malformed) drive letter,
leading to the error:
The filename, directory name, or volume label syntax is incorrect.
This commit fixes that by using a temporary file instead of piping.
- - - - -
14bc71e4 by Sven Tennie at 2026-04-28T13:22:47-04:00
ghc: Distinguish between having an interpreter and having an internal one
Actually, these are related but different things:
- ghc can run an interpreter (either internal or external)
- ghc is compiled with an internal interpreter
Splitting the logic solves compiler warnings and expresses the intent
better.
- - - - -
df691563 by Vladislav Zavialov at 2026-04-28T13:23:29-04:00
Refactor HsWildCardTy to use HoleKind (#27111)
The payload of this patch is that the extension fields of HsWildCardTy
and HsHole now match:
type instance XWildCardTy Ghc{Ps,Rn} = HoleKind
type instance XHole Ghc{Ps,Rn} = HoleKind
This is progress towards unification of HsExpr and HsType.
Test case: T25121_status
In addition to that, exact-printing of infix holes is fixed.
Test case: PprInfixHole
- - - - -
f3485446 by fendor at 2026-04-28T13:24:12-04:00
Expose startupHpc as an rts symbol
- - - - -
28f07d70 by fendor at 2026-04-28T13:24:12-04:00
Make HPC work with bytecode interpreter
Add support to generate .tix files from bytecode objects and the
bytecode interpreter.
Conceptually, we insert HPC ticks into the bytecode similar to how we insert
breakpoints.
HPC and breakpoints do not share the same tick array but we use a separate
tick-array for hpc/breakpoint ticks during bytecode generation.
We teach the bytecode interpreter to handle hpc ticks.
The implementation is quite trivial, simply increment the counter in the
global hpc_ticks array for the respective module.
This hpc_ticks array is generated as part of the `CStub`, so we can rely
on it existing.
A tricky bit is "registering" a bytecode object for HPC instrumentation.
In the compiled case, this is achieved via CStub and initializer/finalizers
`.init` sections which are called when the executable is run.
After the initializers have been invoked, which is before `hs_init_ghc`,
we then call `startup_hpc` in `hs_init_ghc` iff any modules were "registered"
for hpc instrumentation via `hs_hpc_module`.
Since bytecode objects are loaded after starting up GHCi, this workflow
doesn't work for supporting `hpc` and the `hpc` run-time is never
started, even if a module is added for instrumentation.
We fix this issue by employing the same technique as is for `SptEntry`s:
* We introduce a new field to `CompiledByteCode`, called `ByteCodeHpcInfo`
which contains enough information to call `hs_hpc_module`, allowing us to
register the module for `hpc` instrumentation`.
* After registering the module, we unconditionally call `startupHpc`, to make
sure the .tix file is written.
Calling `startupHpc` multiple times is safe.
Calling `hs_hpc_module` multiple times for the same module is also safe.
If we didn't register the hpc module in this way, evaluating a bytecode object
instrumented with `-fhpc` without registering it in the `hpc` run-time will
simply not generate any `.tix` files for this bytecode object.
However, this shouldn't happen if everything is set up correctly.
Closes #27036
- - - - -
950879f0 by Vladislav Zavialov at 2026-04-28T13:24:55-04:00
Move NamespaceSpecifier from x-fields into the AST proper (#26678)
This refactoring moves NamespaceSpecifier out of extension fields and into the
AST proper, as it is part of the user-written source, and is not pass-specific.
Summary of changes:
* Move NamespaceSpecifier from GHC/Hs/Basic.hs to Language/Haskell/Syntax/ImpExp.hs
and parameterise it by the compiler pass, creating the necessary extension points
* Move NamespaceSpecifier out of XFixitySig into FixitySig
* Move NamespaceSpecifier out of XIEThingAll (IEThingAllExt) into IEThingAll
* Move NamespaceSpecifier out of XIEWholeNamespace (IEWholeNamespaceExt) into IEWholeNamespace
This is a pure refactoring with no change in behaviour.
- - - - -
9797052b by Simon Peyton Jones at 2026-04-28T13:25:37-04:00
Fix assertion check in checkResultTy
As #27210 shows, the assertion was a little bit too eager.
I refactored a bit by moving some code from GHC.Tc.Gen.App
to GHC.Tc.Utils.Unify; see the new function tcSubTypeApp,
which replaces tcSubTypeDS
- - - - -
9f85f034 by Duncan Coutts at 2026-04-30T04:52:42-04:00
Make cmm 'import "package" name;' syntax use consistent label types
There is a little-used syntactic form in cmm imports:
import "package" foo;
Which means to import foo from the given package (unit id, specified as
a string). This syntax is somewhat reminiscent of GHC's package import
extension.
This syntax form is not used in the rts cmm code, nor any of the boot
libraries. It may not be used at all. Unclear.
Change the kind of CLabel this syntax generates to be consistent with
the others. The other cmm imports use ForeignLabel with
ForeignLabelInExternalPackage. For some reason this form was using
CmmLabel. Change that to also be ForeignLabel but with
ForeignLabelInPackage. This specifies a specific package, rather
than an unnamed external package.
- - - - -
a811f68f by Duncan Coutts at 2026-04-30T04:52:42-04:00
Change default cmm import statements to be internal
Previously a cmm statement like:
import foo;
meant to expect the symbol from a different shared library than the
current one.
Now it means to expect the symbol from the same shared library as the
current one. We'll add explicit syntax to indicate that it's a foreign
import. Most existing uses are in fact intenal (rts to rts), so few
imports will need to be annotated foreign. Examples would include cmm
code in libraries (other than the rts) that need to access RTS APIs.
In practice, this makes no difference whatsoever at the moment on any
platform other than windows (where building Haskell libs as shared libs
does not fully work yet), since the 'labelDynamic' treats all such
labels as foreign, irrespective of the foreign label source.
- - - - -
17fe5d1d by Duncan Coutts at 2026-04-30T04:52:42-04:00
Add cmm import syntax 'import DATA foo;' as better name for CLOSURE
The existing syntax is:
import CLOSURE foo;
The new syntax is
import DATA foo;
This means to interpret the symbol foo as refering to data (i.e. a
global constant or variable) rather than to code (a function). The
historical syntax for this uses CLOSURE, which is rather misleading.
Presumably this was done to avoid introducing new reserved words.
Be less squemish about new reserved words and add DATA and use that.
Keep the existing CLOSURE syntax as an alias for compatibility.
- - - - -
3a530d68 by Duncan Coutts at 2026-04-30T04:52:42-04:00
Add cmm 'import extern name;' syntax
Since the default for cmm imports is now for symbols within the same
shared object, we need a way to indicate we want a symbol from an
external shared object:
import extern foo; -- for a function
import extern DATA foo; -- for data
This adds a new reserved word 'extern'.
We don't expect to have to use this much. Most cmm imports are
intra-DSO.
This makes no difference currently on ELF and MachO platforms, but does
make a difference to the linking conventions on PE (Windows).
In future it's plausible we could take make distinctions on ELF or
MachO, so it's worth trying to get it right. Windows can be the guinea
pig.
- - - - -
2b8e44c7 by Duncan Coutts at 2026-04-30T04:52:42-04:00
Add cmm syntax 'import "package" DATA foo;' for completeness
We already have:
import DATA foo; -- for data imports
import "package" foo; -- for imports from a given unitid
There's no reason not to have both at once:
import "package" DATA foo;
So add that.
- - - - -
ee05e5cc by Duncan Coutts at 2026-04-30T04:52:42-04:00
Improve the commentary for the cmm import grammar.
AFAIK, this is the only place where GHC-style Cmm syntax is documented.
- - - - -
b35946ad by Duncan Coutts at 2026-04-30T04:52:42-04:00
Add a changelog.d entry for the .cmm import syntax changes
- - - - -
d59b7c71 by Wolfgang Jeltsch at 2026-04-30T04:53:25-04:00
Move code that uses `GHC.Internal.Text.Read` into `base`
This contribution serves to remove all dependencies on
`GHC.Internal.Text.Read` from within `ghc-internal`, so that the
implementation of `Text.Read` and ultimately more reading-related code
can be moved to `base` as well.
The following things are moved from `ghc-internal` to `base`:
* I/O-related `Read` instances
* Most of the `Numeric` implementation
* The instance `Read ByteOrder`
* The `parseVersion` operation
* The `readConstr` operation
Metric Increase:
LinkableUsage01
T9198
T12425
T13035
T13820
T18140
- - - - -
5bd6a964 by Rodrigo Mesquita at 2026-04-30T04:54:08-04:00
New rts Message to {set,unset} TSO flags
This commit introduces stg_MSG_SET_TSO_FLAG_info and
stg_MSG_UNSET_TSO_FLAG_info, which allows setting flags of a TSO other
than yourself.
This is especially useful/necessary to set breakpoints and toggle
breakpoints of different threads, which is needed to safely implement
features like pausing, toggling step-out, toggling step-in per thread,
etc.
Fixes #27131
-------------------------
Metric Decrease:
T3294
-------------------------
- - - - -
ce97fd3e by Rodrigo Mesquita at 2026-04-30T04:54:08-04:00
test: Add test setting another TSO's flags
Introduces a test that runs on two capabilities. The main thread running
on Capability 0 sets the flags on a TSO running on Capability 1.
The TSO from Capability 1 itself checks whether its flags were set and
reports that back.
This validates that the RTS messages for setting TSO flags work, even if
it doesn't test a harsher scenario with race conditions to exercise why
the message passing is necessary for safely setting another TSO's flags.
Part of #27131
- - - - -
a4ff6315 by David Eichmann at 2026-04-30T04:54:51-04:00
Hadrian: withResponseFile outputs response file when verbodity is Verbose
At the Verbose verbosity, shake will display full commandlines. With the
use of response files, the full command is hidden. That makes it hard to run
the command manually. This commit outputs the contents of the response
file so that that full command can be recreated and also hints at the
use of the --keep-response-files hadrian flag.
- - - - -
cd732ee3 by Duncan Coutts at 2026-04-30T04:54:51-04:00
Use response files for hadrian linking with ghc (support long command lines)
In future support for windows dynamic linking, we expect long command
lines for linking dll files with ghc. Experiments with dynamic linking the
ghc-internal library yielded a link command well over 32kb. We did not
encounter this before for static libs, since we already use ar's @file
feature (if available, which it is for the llvm toolchain).
Co-authored-by: David Eichmann <davide(a)well-typed.com>
- - - - -
3d41368f by Andreas Klebinger at 2026-04-30T04:55:32-04:00
Split GHC.Driver.Main.hs up into multiple components.
This commit splits GHC.Driver.Main into four components:
* GHC.Driver.Main.Compile
* GHC.Driver.Main.Hsc
* GHC.Driver.Main.Interactive
* GHC.Driver.Main.Passes
We might improve that separation further in the future but this should
hopefully make it easier to reason about and work with this part of the
code.
- - - - -
2128ba85 by Cheng Shao at 2026-04-30T04:56:14-04:00
compiler: avoid unique OccNames for internal Names in bytecode objects
This patch improves bytecode object serialization logic by avoiding
the construction of unique `OccName`s when serializing/deserializing
internal `Name`s. Closes #27213.
-------------------------
Metric Decrease:
LinkableUsage01
-------------------------
- - - - -
e16854c3 by Vladislav Zavialov at 2026-04-30T04:56:57-04:00
Replace GHC 9.16 references with GHC 10.0
- - - - -
39141343 by Alice Rixte at 2026-05-01T14:09:32+02:00
Add Bounded instances for Double, Float, CDouble and CFloat
- - - - -
5c4c3bf4 by Sylvain Henry at 2026-05-02T03:39:28-04:00
testsuite: fix flaky foundation Divisible / mulIntMayOflo# tests (#27222)
Since the LCG was widened to 64 bits and the seed randomised per CI run
(commit 2d30f7d3400 "Vendor mini-QuickCheck for testsuite"), two latent
bugs in the foundation test surface stochastically:
* The Divisible property `(x `div` y) * y + (x `mod` y) == x` raises
ArithException(Overflow) when (a, b) = (minBound, -1) for fixed-width
signed Integral types. Split testNumber/testDivisible into Bounded and
unbounded variants and skip just that one pair, gated by
`(minBound :: a) < 0` so unsigned types lose no coverage.
* The `mulIntMayOflo#` test compared raw Int# bit-for-bit, but the primop
is only specified to return 0/non-zero -- the exact non-zero indicator
legitimately differs between backends and inlining choices. Add a
dedicated `testPrimopMayOflo` helper that only compares zero / non-zero.
Also fix the long-standing typo "Dividible" -> "Divisible" in identifiers.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
e242ce4f by Sylvain Henry at 2026-05-02T03:39:28-04:00
testsuite: catch and display exceptions in MiniQuickCheck
Exceptions raised while evaluating a property are now caught and reported
as a normal failure (with arguments and seed), instead of aborting the
test.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
3b75cccd by fendor at 2026-05-02T03:40:14-04:00
Fix name of Note [Structure of dep_boot_mods]
- - - - -
9a9ae4df by Duncan Coutts at 2026-05-05T14:44:37-04:00
Use __attribute__((dllimport)) for external RTS symbol declarations
This is needed to be hygenic about DLL symbol imports and exports.
The attribute is ignored on platforms other than Windows.
Use of the attribute however means that external data symbols do not
have a compile-time constant address (they are loaded using an
indirection). This means we have to adjust the rtsSyms initial linker
table so that it is a local constant in a function, rather than a global
constant. We now define it within a function that pre-populates the
symbol table with the RTS symbols.
- - - - -
2ad3e01e by Duncan Coutts at 2026-05-05T14:44:37-04:00
Fix the rts linker declarations for a few data symbols
and ensure that the (windows only) rts_IOManagerIsWin32Native data
symbol is marked as externally visible.
- - - - -
8ff4fdb5 by David Eichmann at 2026-05-05T14:44:37-04:00
Hadrian: Disable runtime pseudo relocations for RTS on windows hosts
- - - - -
96974723 by Teo Camarasu at 2026-05-05T14:45:20-04:00
ghci/TH: refactor to use IORef QState
This is a pure refactor and shouldn't modify semantics at all
- - - - -
eff6bfaf by Teo Camarasu at 2026-05-05T14:45:20-04:00
iserv: recover/getQ/putQ should behave same as internal interpreter
The internal and external interpreter should behave the same when
handling `recover`, the exeception recovery method of Q.
In practice, they diverge. In case of failure, the internal interpreter
only restores error message state to before the computation, wheras the
external interperter restores error message state *and* the state of putQ/getQ.
As far as I can tell this is a simple mistake in the implementation.
Note [TH recover with -fexternal-interpreter] describes the correct
behaviour but the implementation doesn't mirror this.
This change restores the correct behaviour by keeping the effects of
putQ in the erroring computation.
This is a breaking change since it modifies the behaviour of programs
that rely on recover ignoring putQ from failling computations when used
with the external interpreter. Although I highly doubt anyone relies on
this behaviour.
This divergence was first introduced in d00c308633fe7d216d31a1087e00e63532d87d6d.
As far as I can tell this was unintentional and tha commit was trying to solve a different bug.
Resolves #27022
- - - - -
1cb1d672 by Wen Kokke at 2026-05-06T09:53:40-04:00
rts: Add dynamic trace flags API
This commit adds an API to the RTS (exposed via Rts.h) that allows users to dynamically change the trace flags.
Prior to this commit, users were able to stop and start the profiling and heap profiling timers (via startProfTimer/stopProfTimer and startHeapProfTimer/stopHeapProfTimer).
This extends that functionality to also cover the core event types.
The getTraceFlag/setTraceFlag functions read and write the values of the trace flag cache, which is allocated by Trace.c, rather than modifying the members of RtsFlags.TraceFlags.
This is done under the assumption that the members of RtsFlags should not be modified after RTS initialisation.
Consequently, if the user modifies the trace flags using setTraceFlag, the object returned by getTraceFlags (from base) will not reflect these changes.
The trace flags are not protected by locks of any sort.
Hence, these functions are not thread-safe.
However, the trace flags are not modified by the RTS after initialisation, only read, so the race conditions introduced by one user modifying them are most likely benign.
This PR also puts the trace flag cache in a single global struct, as opposed to a collection of global variables, and changes the types of the individual flags from uint8_t to bool, as these have the same size on both Clang and GCC and are a better semantic match.
Prior to the change to uint8_t, they had type int, see 42c47cd6.
Even with its deprecation in C23, I don't think there should be any issue depending on stdbool.h.
The TRACE_X macros are redefined to access the global struct, with values cast to const bool to ensure they are read-only.
- - - - -
9d54dc94 by Wen Kokke at 2026-05-06T09:53:40-04:00
rts: Ensure TRACE_X values are used in place of RtsFlags.TraceFlags.X
- - - - -
418d737b by Wen Kokke at 2026-05-06T09:53:40-04:00
rts: Fix nonmoving-GC tracing
The current nonmoving-GC tracing functions were written in a different
style from the other tracing functions. They were directly implemented
as, e.g., a traceConcMarkEnd function that called postConcMarkEnd.
The other tracing functions are implemented as, e.g., traceThreadLabel_,
a function that posts the thread label event, and traceThreadLabel, a
macro that checks whether TRACE_scheduler is set. This commit fixes that
implementation, and ensures that the nonmoving-GC tracing functions only
emit events if nonmoving-GC tracing is enabled.
- - - - -
99f4afa4 by Wen Kokke at 2026-05-06T09:53:40-04:00
rts: Add SymI_HasProto for get/setTraceFlag
- - - - -
7e9eb8b9 by Wen Kokke at 2026-05-06T09:53:40-04:00
rts: Add SymI_HasProto for start/endEventLogging
- - - - -
3a3045fb by Wen Kokke at 2026-05-06T09:53:41-04:00
rts: Add changelog entry
- - - - -
a3b339a4 by Teo Camarasu at 2026-05-06T09:54:25-04:00
interface-stability/base: don't distinguish ws-32
The interface of base is identical when the Word size is 32bits.
Therefore, there is no need to have another file for this case.
So, we delete it.
Step towards: #26752
- - - - -
eb922183 by Duncan Coutts at 2026-05-07T14:28:50+01:00
Add a rts posix FdWakup utility module
This will be used to implement wakeupIOManager for in-RTS I/O managers.
It provides a notification/wakeup mechanism using FDs, suitable for
situations when a thread is blocked on a set of fds anyway. It uses the
classic self-pipe trick, or equivalently eventfd on supported platforms.
This will initially be used to implement prompt interrupt or shutdown of
the posix ticker thread.
- - - - -
01b0e233 by Duncan Coutts at 2026-05-07T14:28:50+01:00
Add prompt shutdown to the pthread ticker implementation.
The Linux timerfd ticker monitors a pipe which is used by exitTicker to
ensure a prompt wakeup and shutdown. The pthread ticker lacked this and
so would only exit at the next ticker wakeup (10ms by default).
This patch adds the same mechanism to the pthread ticker.
This changes the pthread ticker from waiting by using nanosleep() to
waiting using either ppoll() or select(), so that it can wait on both
a time and a file descriptor. On Linux at least, a test program to
compare the timing jitter of these APIs shows that using nanpsleep,
ppoll or select makes no statistical difference to the maximum or
average jitter.
This is a step towards unifying the posix ticker implementations, so
that we can have just one portable one (albeit with some limited cpp).
It is also a step towards using the ticker as part of a more general
implementation of wakeUpRts, since this will require a method to wake
the rts from a signal handler context (ctl-c handler).
- - - - -
bc41d646 by Duncan Coutts at 2026-05-07T14:28:50+01:00
Update ticker header commentary
It was antique and didn't apply even to the previous implementation, and
certainly not to the updated one.
- - - - -
4ed9a386 by Duncan Coutts at 2026-05-07T14:28:50+01:00
Remove the timerfd-based ticker implementation
There does not appear to be any remaining advantage on Linux to using
the timerfd ticker implementation over the portable one (using ppoll on
Linux for precise timing).
The eventfd implementation was originally added at a time when Linux was
still using a signal based implementation. So it made sense at the time.
See (closed) issue #10840.
- - - - -
97504fa6 by Duncan Coutts at 2026-05-07T14:28:50+01:00
Consolidate to a single posix ticker implementation
Previously we had four implementations, two using signals and two using
threads. Having just one should make behaviour more consistent between
platforms, and should make maintenance easier.
- - - - -
1e60023b by Facundo Domínguez at 2026-05-07T18:01:16-04:00
Generalize so_inline to specify which bindings should be preserved
This commit generalizes the so_inline option of the simple optimizer
so we can indicate with a predicate the specific bindings that should
be kept.
This feature is important for the LiquidHaskell plugin, which relies on the
simple optimizer to make core programs easier to read, but needs to preserve
bindings that are relevant for verification.
See https://gitlab.haskell.org/ghc/ghc/-/issues/24386 for the full discussion.
- - - - -
44cf9cd7 by Wolfgang Jeltsch at 2026-05-12T09:48:18-04:00
Move the `Text.Read` implementation into `base`
- - - - -
4ac3f7d6 by Vladislav Zavialov at 2026-05-12T09:49:03-04:00
EPA: Use AnnParen for tuples and sums
Summary of changes
* Do not use AnnParen in XListTy, replace it with EpToken "[" and "]"
* Specialise AnnParen to tuple/sums by dropping the AnnParensSquare
and keeping only AnnParens and AnnParensHash
* Use AnnParen in XExplicitTuple
* Use AnnParen in XExplicitTupleTy
* Use AnnParen in XTuplePat
* Use AnnParen in XExplicitSum (via AnnExplicitSum)
* Use AnnParen in XSumPat (via EpAnnSumPat)
This is a refactoring with no user-facing changes.
- - - - -
1bdcddec by Duncan Coutts at 2026-05-12T09:49:48-04:00
Add minimal dlltool support to ghc-toolchain
The dlltool is a tool that can create dll import libraries from .def
files. These .def files list the exported symbols of dlls. Its somewhat
like gnu linker scripts, but more limited.
We will need dlltool to build the rts and ghc-internal libraries as DLLs
on Windows. The rts and ghc-internal libraries have a recursive
dependency on each other. Import libraries can be used to resolve
recursive dependencies between dlls. We will use an import library for
the rts when linking the ghc-internal library.
- - - - -
f7fc3770 by Duncan Coutts at 2026-05-12T09:49:48-04:00
Add minimal dlltool support into ./configure
Find dlltool, and hopefully support finding it within the bundled llvm
toolchain on windows.
- - - - -
e4e22bfb by Duncan Coutts at 2026-05-12T09:49:48-04:00
Update the default host and target files for dlltool support
- - - - -
5666c8f9 by Duncan Coutts at 2026-05-12T09:49:48-04:00
Add dlltool as a hadrian builder
Optional except on windows.
- - - - -
5e14fe3f by Duncan Coutts at 2026-05-12T09:49:48-04:00
Update and generate libHSghc-internal.def from .def.in file
The only symbol that the rts imports from the ghc-internal package now
is init_ghc_hs_iface. So the rts only needs an import lib that defines
that one symbol.
Also, remove the libHSghc-prim.def because it is redundant. The rts no
longer imports anything from ghc-prim.
Keep libHSffi.def for now. We may yet need it once it is clear how
libffi is going to be built/used for ghc.
- - - - -
3d91e4a6 by Duncan Coutts at 2026-05-12T09:49:48-04:00
Add rule to build libHSghc-internal.dll.a and link into the rts
On windows only, with dynamic linking.
This is needed because on windows, all symbols in dlls must be resolved.
No dangling symbols allowed. References to external symbols must be
explicit. We resolve this with an import library. We create an import
library for ghc-internal, a .dll.a file. This is a static archive
containing .o files that define the symbols we need, and crucially have
".idata" sections that specifies the symbols the dll imports and from
where.
Note that we do not install this libHSghc-internal.dll.a, and it does
not need to list all the symbols exported by that package. We create a
special purpose import lib and only use it when linking the rts dll, so
it only has to list the symbols that the rts uses from ghc-internal
(which is exactly one symbol: init_ghc_hs_iface).
- - - - -
c8dae539 by Alice Rixte at 2026-05-12T09:50:52-04:00
Script for downloading and copying `base-exports` file
- - - - -
5fab2238 by Wolfgang Jeltsch at 2026-05-12T21:24:27+03:00
Introduce a cache of home module name providers
This contribution introduces to the module graph a cache that maps home
module names to sets of units providing them and changes the finder to
use that cache. This is a performance optimization, especially for
multi-home-unit builds.
The particular changes are as follows:
* In `GHC.Unit.Module.Graph`, `ModuleGraph` is extended with a new
field `mg_home_module_name_providers_map`, exposed as
`mgHomeModuleNameProvidersMap`. This is a cache that assigns to each
home module name the set of IDs of home units that define it.
Operations that construct module graphs are updated such that this
cache stays synchronized.
* In `GHC.Unit.Finder`, `findImportedModule` is changed to pull
`mgHomeModuleNameProvidersMap` from `hsc_mod_graph` and pass it to
`findImportedModuleNoHsc`, which now does not search home units in
arbitrary order but prioritizes those units that the cache mentions
as potential providers of the requested module.
In addition, this contribution adds variants of the two multi-component
compiler performance tests that use 100 units instead of 20, because
with just 20 units the benefits from caching of home module name
providers are still negligible.
The following table shows the total time needed for running both
multi-component tests before and after this contribution and with
different numbers of units:
| # of units | Before | After |
|-----------:|-------:|------:|
| 20 | 0:12 | 0:12 |
| 100 | 0:47 | 0:42 |
| 200 | 3:05 | 2:08 |
Note that there seems to be a general overhead of 12 seconds that is not
attributable to the actual tests, so that the real running times should
be 12 seconds smaller than shown above.
Resolves #27055.
Metric Decrease:
MultiComponentModules
MultiComponentModulesRecomp
Co-authored-by: Matthew Pickering <matthewtpickering(a)gmail.com>
Co-authored-by: Fendor <fendor(a)posteo.de>
- - - - -
38b76b2f by Cheng Shao at 2026-05-13T17:48:48-04:00
testsuite: mark T22159 as fragile
This patch marks T22159 as fragile on Windows for issue described in #27248.
Before we get to the bottom of those failures, this unblocks newer
Windows runners.
- - - - -
50188615 by Ian Duncan at 2026-05-14T13:45:07+02:00
AArch64: use ASR not LSR for MO_U_Shr at W8/W16
The unsigned right shift (MO_U_Shr) for sub-word widths (W8, W16)
with a variable shift amount was emitting ASR (arithmetic/signed shift
right) after zero-extending with UXTB/UXTH. This should be LSR
(logical/unsigned shift right). After zero-extension the upper bits
happen to be 0 so ASR produces the same result, but it is semantically
wrong and would break if the zero-extension were ever optimized away.
Includes assembly output test (grep for lsr) and runtime test
verifying unsigned right shift of Word8 and Word16 values.
- - - - -
28666fbf by Vladislav Zavialov at 2026-05-19T12:44:05-04:00
Add type families: Tuple, Constraints, Tuple#, Sum# (#27179)
These type families map tuples of types to the corresponding Tuple<N>,
Tuple<N>#, CTuple<N>, and Sum<N># types. Some examples at N=2:
Tuple (Int, Bool) = Tuple2 Int Bool
Constraints (Show a, Eq a) = CTuple2 (Show a) (Eq a)
Tuple# (Int#, Float#) = Tuple2# Int# Float#
Sum# (Int#, Float#) = Sum2# Int# Float#
See GHC Proposal #145 "Non-punning list and tuple syntax".
To make the Sum# instance at N=64 possible, this patch also introduces
the Sum64# constructor declaration and bumps mAX_SUM_SIZE from 63 to 64.
Metric Increase:
ghc_experimental_dir
- - - - -
41c2448b by Wen Kokke at 2026-05-19T12:44:53-04:00
rts: Add IPE event class for -l
This commit adds a new IPE event class to the -l RTS flag.
Previously, IPE events were enabled unconditionally.
However, the IPE events can easily grow to hundreds or thousands of megabytes.
With the new event class you can pass, e.g., -l-I to disable IPE events.
- - - - -
62536551 by Wen Kokke at 2026-05-19T12:44:53-04:00
ghc-internal: Add TraceFlags.traceIPE
- - - - -
e45312d1 by Wen Kokke at 2026-05-19T12:44:53-04:00
testsuite: Add test for TraceFlags.traceIpe
- - - - -
4768d9aa by Wen Kokke at 2026-05-19T12:44:53-04:00
ghc-internal: Add DebugFlags.ipe
- - - - -
bc1b5c69 by Wen Kokke at 2026-05-19T12:44:53-04:00
testsuite: Add test for DebugFlags.ipe
- - - - -
0da1543f by Duncan Coutts at 2026-05-19T12:45:37-04:00
Document removal of the signal-based interval timer
Update mentions within the RTS section of the users guide.
Add a changelog entry.
- - - - -
b2911514 by Duncan Coutts at 2026-05-19T12:45:37-04:00
Fix section for an recent changelog entry
- - - - -
d6d76a7a by David Eichmann at 2026-05-19T12:46:19-04:00
ghc-toolchain: implement llvm program versioning logic
- - - - -
2dd36fa3 by Wolfgang Jeltsch at 2026-05-20T04:49:52-04:00
Turn `Trustworthy` into `Safe` in `base` where possible
- - - - -
f4399dd1 by Wolfgang Jeltsch at 2026-05-20T04:50:37-04:00
Make the current `base` buildable with GHC 10.0
- - - - -
1a7de232 by Duncan Coutts at 2026-05-20T12:26:25-04:00
Hadrian: remove legacy rts .so symlinks
For compatibility with the old makefile based build system, hadrian had
rules to generate symlinks from unversioned to versioned names for the
rts .so/.dynlib file, like libHSrts-ghcx.y.so -> libHSrts-1.0.3-ghcx.y.so
We no longer need these symlinks since the makefile build system has
been retired some time ago. The need for these symlinks is awkward on
windows where we cannot (in practice) create symlinks. So rather than
make them conditional (non-windows), just remove them entirely.
- - - - -
286f1adf by fendor at 2026-05-20T12:27:09-04:00
Fix regression T27202: `:load` and `:add` work in GHCi
To fix the regression there are conceptually two major things that we
fix:
* We don't remove the `importDirs` from `interactive-session`
* When `:add`ing a module, we don't try to find them via PackageImports
* The PackageImport is wrong as we can't know the package-name at
this stage in ghc/UI.hs
What does it mean to not remove the `importDirs` from
`interactive-session`?
It means that, given some initial `DynFlags`, we will use those
`importDirs` in `interactive-session`.
The initial `DynFlags`, however, depend on how you initialise the GHC
session.
For a simple session, initialised by
ghc -isrc -this-unit-id main
It is simple, just use the `DynFlags` given on the cli.
Thus, `main` and `interactive-session` will have the same `DynFlags`,
except for the `homeUnitId` and `interactive-session` depends on `main`
by construction of the GHCi session.
What about a multiple home unit session, though?
ghc -unit @unit1 -unit @unit2
What are the `DynFlags` in this cli invocation? It shouldn't be either
`@unti1` nor `@unit2`, as the order shouldn't matter or any other
implicit condition.
For consistency, we decide that the initial `DynFlags` are the top
`DynFlags` on the cli, ignoring `-unit` flags.
Thus, in this example, there are no `importsDirs` regardless of what we
might find in `@unit1` and `@unit2`.
But in this invocation:
ghc -isrc -unit @unit1 -unit @unit2
The `interactive-session` will have the `importsDirs` `src`.
Note, `-isrc` will be inherited in `@unit1` and `@unit2`, so you need to
explicitly use `-i` to clear the `importsDirs`, in order to avoid
accidentally adding `src` as an import directory to all other home
units.
This fix has been made possible by the improvements introduced in
!15888, which avoids ambiguity when a home unit shares the `importsDirs`
with the `interactive-session`, on top of being much faster for multiple
home units.
Adds regression tests for T27202 for `:load`ing and `:add`ing modules
that are located in import directories.
- - - - -
728662de by fendor at 2026-05-20T12:27:09-04:00
Use home unit package db stacks in GHCi prompt and session unit
In order to import modules from home unit dependencies (e.g., `Data.Map`),
the ghci prompt unit needs to populate its `UnitState`.
This is tricky to handle correctly, which `PackageDBFlag`s should we use
to populate the `UnitState`?
We decide, the most intuitive solution for users is to depend on all
`PackageDBFlag`s, so that any dependency can be imported in GHCi.
This assumes consistency in the `PackageDBFlag`s, so no two home units
specify `PackageDBFlag`s that are inconsistent with each other.
We could simply concat all the `PackageDBFlag`s of the existing home
units, but later `PackageDBFlag`s shadow earlier ones, leading to the
last processed home units' `PackageDBFlag`s to shadow the earlier ones.
This is hard to fix, we need to give users the capability to provide ghc
options for the ghci prompt home unit.
However, as this is considerably more work, we decided on an
approximation that should work out most of the time.
Package Db stacks in cabal and stack follow a certain structure:
-no-user-package-db > -package-db $cabal-store > -package-db $local-db
The first two arguments are always the same, namely the
`-no-user-package-db` and `-package-db`.
We compute the longest common prefix over all home units, and use that
as the start of the package db stack. Then, over the rest of the
`PackageDBFlag`s, we simply take the union and append them to our
initial stack.
We assume, that the rest of package dbs only defines very few, "local"
units that are usually not shadowing each other.
This allows us to get a relatively consistent package database stack for
the ghci prompt home unit.
Similar reasoning applies to the session unit in order to add modules to
the session and have dependencies available in the module.
We do something similar for `-package` flags, to make sure only the
correct units are actually visible in the ghci session.
This time, we simply take the union of all `PackageFlag`s, allowing us
to import modules from the home unit dependencies.
In the future, it would be beneficial to allow the user to provide the
exact ghc options to control the visibilities. For now, this will have
to do.
- - - - -
740d89a0 by Simon Peyton Jones at 2026-05-20T17:20:44-04:00
Do not use mkCast during typechecking
This commit fixes #27219. The problem was that the typechecker was using
`mkCast`, whose assertion checks legitimately fail when applied to types
that contain unification variables.
- - - - -
a50fdb06 by Simon Peyton Jones at 2026-05-20T17:20:45-04:00
Major refactor of the Simplifier
The main payload of this patch is to refactor the Simplifer to avoid
repeated simplification when using Plan (AFTER) for rule rewrites.
The need for this was shown up by #26989.
See Note [Avoid repeated simplification] in GHC.Core.Opt.Simplify.Iteration.
Related refactoring:
* Refactor the two fields `sc_dup` and `sc_env` in `ApplyToVal` into one, `sc_env`.
Reason: the envt is irrelevant in the "simplified" case, so the data type describes
the possiblitiies much more accurately now.
* Some refactoring in `knownCon` to split off `wrapDataConFloats`.
* Refactor `lookupRule` and its auxiliary functions to return `RuleMatch`,
a new data type. See Note [data RuleMatch] in GHC.Core. Ditto for BuiltinRule.
This RuleMatch returns fragments of the target in rm_args and rm_floats,
leaving `rm_rhs` to be the stuff from the RULE itself.
Doing this has routine consequences in GHC.Core.Opt.ConstantFold. Many changes
there but all routine.
* When doing occurrence analysis on RULEs, make the occ-info on the rule
binders relate just to the RHS, not the LHS. See (OUR1) in
Note Note [OccInfo in unfoldings and rules]
This means that Lint must not complain about the fact that the patterns
in the RULE mentions binders that are marked dead.
See Note [Dead occurrences] in GHC.Core.Lint.
I changed the Core pretty-printer so that it didn't suppress dead binders,
else I can't see those binders in RULEs. That led to quite a lot of testsuite wibbles.
* Refactor FloatBinds, so that it is used both by
`exprIsConApp_mabye` and by `lookupRule`
* Move the definition of FloatBinds out of GHc.Core.Make, into GHC.Core.
* Add FloatTick as an extra constructor.
* Refactor `lookupRule` to use `FloatBinds` instead of `BindWrapper`.
This refactor just shares more code.
(Rename GHC.Core.Opt.FloatOut.FloatBinds to FloatLets, to avoid gratuitious
name clash with GHC.Core.FloatBinds.)
Corecion optimisation
* In simpleOpt, when composing coercions, call new function `optTransCo`.
This is much lighter weight than full blown coercion optimisation.
* Make `GHC.Core.Opt.Arity.pushCoValArg` and `pushCoTyArg` return the
coercionLKind of the coercion. This saves recomputing that coercionLKind
at the key call sites in GHC.Core.Opt.Simplify.Iteration.pushCast.
* Rename `addCoerce` in GHC.Core.Simplify.Iteration to become `pushCast`.
* In the `ApplyToVal` case of `pushCast` we had a very unsavoury call to `simplArg`.
I eliminated it by adding a field `sc_cast` to `ApplyToVal` that records any
pending casts. Much nicer now. See Note [The sc_cast field of ApplyToVal].
* Don't optimise coercions if the type-substitution is empty.
See Note [Optimising coercions] in GHC.Core.Opt.Simplify.Iteration.
The fix for #26838 is dramatic. For the test in perf/compiler/T26839 we have
Compiler allocs: Before: 7,363M
After: 688M
Compile time goes down generally. Here are compiler-alloc changes
over 0.5%:
CoOpt_Read(normal) 729,184,920 -0.7%
CoOpt_Singletons(normal) 666,916,960 -4.6% GOOD
LargeRecord(normal) 1,227,056,876 +1.1%
T12227(normal) 256,827,604 -4.6% GOOD
T12425(optasm) 76,879,410 -0.8%
T12545(normal) 787,826,918 -10.8% GOOD
T12707(normal) 775,186,464 -0.9%
T13253(normal) 318,599,596 -0.8%
T14766(normal) 685,857,320 -1.0%
T15304(normal) 1,123,333,422 -2.2%
T15630(normal) 123,142,330 -2.6%
T15630a(normal) 123,092,100 -2.6%
T15703(normal) 299,751,682 -2.9% GOOD
T17516(normal) 964,072,280 +1.0%
T18223(normal) 367,016,820 -6.2% GOOD
T18730(optasm) 130,643,770 -3.3% GOOD
T20261(normal) 535,608,584 -0.7%
T21839c(normal) 340,340,436 -0.9%
T24984(normal) 85,568,392 -1.9%
T3064(normal) 174,631,992 -1.2%
T3294(normal) 1,215,886,432 -0.7%
T5030(normal) 141,449,704 -17.2% GOOD
T5321Fun(normal) 258,484,744 -1.9%
T8095(normal) 770,532,232 -2.7%
T9630(normal) 858,423,408 -14.5% GOOD
T9872c(normal) 1,591,709,448 +0.7%
info_table_map_perf(normal) 19,700,614,458 -1.3%
geo. mean -0.7%
minimum -17.2%
maximum +1.1%
However, strangely there seems to be a 5.0% increase in CoOpt_Read in
the x86_64-linux-fedora43-validate+debug_info+ubsan job, although
there generally a /decrease/ in this test in other builds. The baseline
value looks strange. Anyway I'll just accept it.
Metric Decrease:
CoOpt_Singletons
T12227
T12545
T12707
T15703
T18223
T18730
T21839c
T5030
T9630
Metric Increase:
CoOpt_Read
- - - - -
834623d4 by Mrjtjmn at 2026-05-20T17:21:41-04:00
users-guide: Fix weird notation in "Summary of stolen syntax"
- - - - -
6f9d7c71 by Markus Läll at 2026-05-21T15:25:34-04:00
Use "grimily" instead of "grimly"
Fixes https://gitlab.haskell.org/ghc/ghc/-/issues/27221
- - - - -
50e999ca by fendor at 2026-05-21T15:26:18-04:00
Speed up 'closure' computation in `ghc-pkg`
Cache the set of already seen `UnitId`s and use `Set` operations to
speed up 'closure' computation.
Further simplify the implementation of 'closure' to account for the
actual usage.
As a consequence, we rename 'closure' to 'brokenPackages' to reflect its
purpose better after the simplification.
- - - - -
7ecc6184 by sheaf at 2026-05-21T15:27:10-04:00
TcMPluginHandling: be more lenient when no plugins
This change ensures that, if a function such as 'typecheckModule' was
invoked with 'NoTcMPlugins', GHC doesn't spuriously complain about TcM
plugins having already been stopped, as there were none to start with.
- - - - -
72c8de5c by Simon Jakobi at 2026-05-23T18:41:42-04:00
Implement List.elem via foldr
...in order to allow specialization to Eq instances.
The implementation of notElem is updated for consistency.`
Corresponding CLC proposal:
https://github.com/haskell/core-libraries-committee/issues/412
Addresses #27096.
- - - - -
3268c610 by Alan Zimmerman at 2026-05-23T18:42:30-04:00
EPA: Fix span for qualified multiline string
Fix the span for a qualified multiline string like
Text."""
I'm a multiline
Text value
!
"""
to extend to the end of the entire string, not just the first line.
Closes #27274
- - - - -
1f096790 by Alan Zimmerman at 2026-05-23T18:43:20-04:00
EPA: Fix exact printing namespace-specified wildcards
Ensures correct printing of imports of the form
import Data.Bool (data True(data ..))
import Data.Bool (data True(type ..))
Closes #27291
- - - - -
56ada7c0 by Mrjtjmn at 2026-05-23T18:44:19-04:00
Fix ambiguous syntax of BangPatterns in users guide
Update documentation for the BangPatterns extension to specify
how surrounding whitespace affects interpretation of `!`.
* Only when there is whitespace before `!` and no whitespace after,
it is recognized as a BangPattern.
* Other cases `⟨varid⟩!⟨varid⟩`, `⟨varid⟩ ! ⟨varid⟩`, `⟨varid⟩! ⟨varid⟩`
are treated as infix operators.
- - - - -
579aa0b7 by Simon Jakobi at 2026-05-25T16:31:26-04:00
Ensure that SetOps.{minusList,unionListsOrd} can be specialized
...by marking them INLINABLE. Haddock allocates 0.1–0.3% less as a
result.
This also removes some redundant constraints on unionListsOrd.
- - - - -
cccf45da by Cheng Shao at 2026-05-25T16:32:13-04:00
wasm: ensure post-linker output is synchronous ESM
This patch fixes wasm backend's post-linker output script to ensure
it's synchronous ESM and doesn't use top-level await, which doesn't
work in ServiceWorkers. Fixes #27257.
- - - - -
8db331a3 by Zubin Duggal at 2026-05-26T04:54:03-04:00
Update to semaphore-compat 2.0.0 using v2 of the protocol
On Linux and other POSIX platforms, GHC's -jsem jobserver client now
speaks v2 of the semaphore-compat protocol, which uses Unix domain
sockets in place of POSIX named semaphores. This avoids the libc-ABI
issues that affected the old implementation. Windows is unaffected
and continues to use the v1 protocol (Win32 named semaphores); its
reported protocol version remains v1.
When GHC receives a -jsem name whose protocol version it does not
support, it emits a -Wsemaphore-version-mismatch warning and falls
back to -j<N> rather than crashing. ghc --info exposes the supported
version in a new "Semaphore version" entry so cabal-install can detect
a mismatch before invoking GHC.
Users on a cabal-install that predates the v2 update will continue to
build successfully on Linux/POSIX, but will lose the cross-process
-jsem coordination and fall back to -j<N> per GHC invocation. Users
must upgrade to a cabal-install that supports protocol v2 to recover
full parallelism.
Also fix a leak in cleanupSem (#27253): cleanupSem used to snapshot
heldTokens and release them before killing the loop, while the loop's
in-flight acquire/release children could still be mutating it.
Cleanup now runs inside the loop's own exit handler, after draining
the active child via a new activeChild TVar, so the snapshot has no
concurrent mutator.
See also:
- GHC proposal amendment: https://github.com/ghc-proposals/ghc-proposals/pull/673
- cabal-install patch: https://github.com/haskell/cabal/pull/11628
- semaphore-compat MR: https://gitlab.haskell.org/ghc/semaphore-compat/-/merge_requests/8
Bump semaphore-compat submodule to 2.0.0
Fixes #25087 and #27253
- - - - -
17be4f1f by Alan Zimmerman at 2026-05-26T04:54:52-04:00
EPA: Record semicolons in HsModifier
Ensure the semi colons are captured in the ParsedSource for code like
%True;; %False;
instance C D
It makes HsModifier (and hence HsModifierOf) LocatedA, so the semi
colons can be recorded as [TrailingAnn]
Also rename pprHsModifiers to pprLHsModifiers to match.
Closes #27294
- - - - -
8f991755 by fendor at 2026-05-26T11:02:52-04:00
Revert prog003 acceptance
We thought the commit 286f1adff3e78d775ff325caff71d0cee25d710b fixed the
test, but due to changes to ghci, modules loaded during the GHCi
session, the test was actually no longer testing what it set out to do,
"fixing" the broken test.
As modules are added to the `interactive-session` home unit, the object code needs
to be compiled with `-this-unit-id interactive-session`, otherwise the
object code won't be used.
Once this has been fixed in the test, the test fails as expected again.
- - - - -
277a3687 by mangoiv at 2026-05-26T11:03:40-04:00
libraries/process: bump submodule to v1.6.29.0
This submodule bump resolves a segfault on macos 15.
Fixes #27144
- - - - -
6779bb0c by mangoiv at 2026-05-26T11:03:40-04:00
libraries/unix: in submodule, don't pick branch 2.7
The 2.7 branch is outdated and the module has been advanced far beyond
it anyway, so remove that line.
- - - - -
4a645683 by Simon Peyton Jones at 2026-05-27T21:41:59-04:00
Trim the continuation in mkDupableContWithDmds
When there are no remaining argument demands, it means the application
is bottoming. In this case, we can trim the continuation to avoid the
panic that was observed in #27261.
See Note [Trimming the continuation for bottoming functions] in
GHC.Core.Opt.Simplify.Iteration.
- - - - -
8ab506ff by Cheng Shao at 2026-05-27T21:42:47-04:00
ghci: fix module name string lifetime in hs_hpc_module invocation
This patch makes hpcAddModule pass a properly malloced module name
string to hs_hpc_module, instead of using useAsCString which causes
use-after-free of module name string. Fixes #27297.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
b0233814 by sheaf at 2026-05-27T21:43:31-04:00
Relax acceptance threshold for T10421
As seen in #27289, the 1% acceptance threshold for this text was
overly narrow, resulting in spurious test failures. This commit widens
the acceptance threshold to 2%. Fixes #27289.
- - - - -
63ce5770 by Luite Stegeman at 2026-05-28T12:23:35-04:00
Fixes for black holes
- suspend duplicate work for eager black holes
- detect eager black holes in checkBlockingQueues
- don't overwrite existing black holes even if they're not
in an eager blackhole frame
- don't deadlock on self when thunk is already blackholed
Fixes #26936
- - - - -
037a80dc by Tom McLaughlin at 2026-05-28T12:24:36-04:00
Event/Windows.hsc: rethrow exceptions in overlapped IO
This prevents the WinIO manager from swallowing exceptions in overlapped IO. It
was added to make WinIO support possible in the `network` library. See
https://gitlab.haskell.org/ghc/ghc/-/issues/27283.
We also bump __IO_MANAGER_WINIO__ to 2 so libraries can gate on this using CPP.
- - - - -
2d53bcdb by Wolfgang Jeltsch at 2026-05-28T12:25:21-04:00
Allow `downsweep` to use nodes of an existing module graph
To this end, `downsweep` has not been able to use the nodes of a module
graph obtained from a previous downsweeping round. In some GHC API
applications, downsweeping is performed somewhat incrementally and
therefore could profit from reusing such existing results. This
contribution makes this possible.
Resolves #27054.
Co-authored-by: Matthew Pickering <matthewtpickering(a)gmail.com>
- - - - -
f4fbb583 by Simon Jakobi at 2026-05-28T12:26:04-04:00
Add regression test for T11226
Closes #11226.
- - - - -
ed29a5e6 by Sven Tennie at 2026-05-28T17:30:36-04:00
Add optional config setting for LibDir (#19174)
Previously, the `libDir` was derived from `topDir`. This won't work for
inplace stage2 cross-compilers where binaries and libraries are in
different stage dirs (`_build/stage1/` for executables and
`_build/stage2` for libraries).
`LibDir` is set in the inplace `settings` files. For bindists, we
generate a new `settings` file with no `LibDir` entry. GHC then defaults
to use `topDir` as `libDir` again. This keeps the bindist relocatable.
If `LibDir` is a relative path, it is interpreted relatively to
`topDir`.
The global package db is part of the `lib/` folder. If we want to point
for inplace cross-compilers to the succeeding stage's folder, this is
done by setting `LibDir`. Thus, the global package db must be found
relative to `libDir`` (which may default to `topDir` or be set by
`LibDir`).
The complexity of settings becomes scary. So, add a test to ensure
`LibDir` works as expected.
- - - - -
8339cf8f by Sven Tennie at 2026-05-28T17:30:36-04:00
Add Haddock to FileSettings
Helping to understand the fields' meanings without deeper analyses.
- - - - -
4ce251e4 by Sylvain Henry at 2026-05-28T17:31:39-04:00
foundation test: skip signed minBound `quot` (-1) (#27222)
`minBound `quot` (-1)` for fixed-width signed integers is platform
dependent: the mathematical result -minBound is not representable in
the type. On x86, IDIV traps; LLVM's sdiv is undefined behaviour in
this case; on AArch64/RISC-V, SDIV wraps to minBound.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
b8ba7e61 by Simon Jakobi at 2026-05-28T17:32:23-04:00
Prevent dictionary-passing in checkTyEqRhs
...by pre-specializing it to TcM.
Previously, wherever checkTyEqRhs was used in other modules, the
Core showed dictionary passing ($fMonadIOEnv). The added SPECIALIZE
pragma prevents this.
- - - - -
d603477f by David Eichmann at 2026-05-29T13:17:12-04:00
Hadrian: create a ghc-internal .def file per ghc-internal dll
The .def file generated from rts/win32/libHSghc-internal.def.in contains
the name of the ghc-internal dll. The correct dll name differs based
on if the dll is inplace/final and if using the Dynamic way. Previously,
this was not accounted for and inconsistent dlls names where used. That
led to failure when loading dlls at runtime in experiments with windows
dynamic linking.
- - - - -
1fc21753 by Sylvain Henry at 2026-05-29T13:18:14-04:00
ghc-bignum: copy backend interface haddocks to Native backend (#27305)
The haddock comments documenting the BigNat backend interface (function
contracts, expected MutableWordArray# sizes, return-value semantics, etc.)
were attached to the FFI backend module. Copy them to the Native backend
so they remain in tree once the FFI backend is removed.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
717059df by Sylvain Henry at 2026-05-29T13:18:14-04:00
ghc-bignum: remove FFI backend (#27305)
The FFI backend of ghc-bignum (now part of ghc-internal) had no known
users and is easy to recreate by relinking ghc-internal with a custom
backend. Remove the backend module, the bignum-ffi cabal flag, and the
ffi option from Hadrian's --bignum selector. The backend interface
documentation now lives in the Native backend module.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
4bb3b1d8 by Sylvain Henry at 2026-05-29T13:18:14-04:00
ghc-bignum: remove Check backend (#27305)
The Check backend of ghc-bignum (now part of ghc-internal) compared the
selected backend's output against the Native backend for validation.
It had no known users. Remove the backend module, the bignum-check
cabal flag, the bignumCheck Hadrian flavour field, and the check-
prefix in Hadrian's --bignum selector.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
6b3044a0 by David Eichmann at 2026-05-30T11:58:48-04:00
Add code comments to allocator code
- - - - -
f4e04210 by Matthew Pickering at 2026-05-30T11:59:34-04:00
hadrian: Refactor system-cxx-std-lib rules
I noticed a few things wrong with the hadrian rules for
`system-cxx-std-lib` rules.
* For `text` there is an ad-hoc check to depend on `system-cxx-std-lib`
outside of `configurePackage`.
* The `system-cxx-std-lib` dependency is not read from cabal files.
* Recache is not called on the packge database after the `.conf` file is
generated, a more natural place for this rule is `registerRules`.
Treating this uniformly like other packages is complicated by it not
having any source code or a cabal file. However we can do a bit better
by reporting the dependency firstly in `PackageData` and then needing
the `.conf` file in the same place as every other package in
`configurePackage`.
This commit increases the `shakeVersion`, to provide backwards
compatibility to previous builds with different PackageData.
Fixes #25303
Co-authored-by: Sven Tennie <sven.tennie(a)gmail.com>
- - - - -
ac813ff5 by Recursion Ninja at 2026-06-01T13:13:27-04:00
Decoupling 'L.H.S' from 'GHC.Types.SourceText'
* Migrated 'IntegralLit' to 'L.H.S.Lit'.
* Migrated 'FractionalLit' to 'L.H.S.Lit'.
* Migrated 'StringLiteral' to 'L.H.S.Lit'.
* Added TTG extension points to the types above.
* Added nice export list to 'GHC.Hs.Lit'.
* Added 'rnOverLitVal' and 'tcOverLitVal' functions to 'GHC.Hs.Lit'.
* Added instance 'Anno (StringLiteral (GhcPass p)) = SrcSpanAnnN'
* Moved [Notes] about 'SourceText' from 'L.H.S.*' to 'GHC.*'.
* Removed all references to 'SourceText' from 'L.H.S'.
* Removed the trailing comma record field from 'StringLiteral'
* Renamed exported functions for nomenclature consistency.
* Deprecated the renamed functions
Resolves issue #26953
- - - - -
846a549b by Recursion Ninja at 2026-06-01T13:14:18-04:00
Reverting erroneous rebase changes
- - - - -
854 changed files:
- .gitlab-ci.yml
- .gitlab/generate-ci/gen_ci.hs
- .gitlab/issue_templates/release_tracking.md
- .gitlab/jobs.yaml
- .gitlab/merge_request_templates/Default.md
- .gitmodules
- + changelog.d/T15973
- + changelog.d/T19174.md
- + changelog.d/T25636
- + changelog.d/T26979
- + changelog.d/T27022
- + changelog.d/T27121.md
- + changelog.d/T27124.md
- + changelog.d/T27131
- + changelog.d/T27202
- + changelog.d/T27261
- + changelog.d/binary-array-no-list
- + changelog.d/bump-process
- + changelog.d/bytecode-interpreter-hpc-support
- + changelog.d/changelog-entries
- + changelog.d/cmm-import-syntax-changes
- + changelog.d/config
- + changelog.d/dynamic-trace-flags
- + changelog.d/elem-via-foldr-27096
- + changelog.d/fix-blackhole-handling
- + changelog.d/fix-duplicate-pmc-warnings
- + changelog.d/fix-finalizers-27072
- + changelog.d/fix-ghci-duplicate-warnings-26233
- + changelog.d/ghc-api-epa-parens
- + changelog.d/ghc-api-holes-ast-27111
- + changelog.d/ghc-api-namespace-specifier-26678
- + changelog.d/ghc-pkg-faster-closure
- + changelog.d/ghc-pkg-long-path-support
- + changelog.d/hadrian-response-files.md
- + changelog.d/hadrian-system-cxx-std-lib-25303
- + changelog.d/hadrian-warn-missing-package-index-16484
- + changelog.d/ipe-event-class
- + changelog.d/jobserver-leak-fix
- + changelog.d/lib-add-tuple-tyfam-27179
- + changelog.d/libdir-setting
- + changelog.d/llvm-22
- + changelog.d/module-graph-reuse-in-downsweep
- + changelog.d/more-efficient-home-unit-imports-finding
- + changelog.d/no-more-timer-signal
- + changelog.d/remove-bignum-check-backend
- + changelog.d/remove-bignum-ffi-backend
- + changelog.d/rts_symlinks.md
- + changelog.d/semaphore-v2
- + changelog.d/simd_constant_folding
- + changelog.d/skip-test
- + changelog.d/so_inline_is_a_predicate
- + changelog.d/tcplugin_init.md
- + changelog.d/tcplugins-pmc.md
- + changelog.d/typecheckModule-API.md
- + changelog.d/wasm-fix-serviceworker
- + changelog.d/windows-rethrow-overlapped-exception
- + changelog.d/withTcPlugins.md
- compiler/GHC.hs
- compiler/GHC/Builtin/Utils.hs
- compiler/GHC/Builtin/primops.txt.pp
- compiler/GHC/ByteCode/Asm.hs
- compiler/GHC/ByteCode/Binary.hs
- compiler/GHC/ByteCode/InfoTable.hs
- compiler/GHC/ByteCode/Instr.hs
- compiler/GHC/ByteCode/Linker.hs
- compiler/GHC/ByteCode/Types.hs
- compiler/GHC/Cmm/LayoutStack.hs
- compiler/GHC/Cmm/Lexer.x
- compiler/GHC/Cmm/Liveness.hs
- compiler/GHC/Cmm/Opt.hs
- compiler/GHC/Cmm/Parser.y
- compiler/GHC/Cmm/Utils.hs
- compiler/GHC/CmmToAsm/AArch64/CodeGen.hs
- compiler/GHC/CmmToAsm/X86/CodeGen.hs
- compiler/GHC/CmmToLlvm/Base.hs
- compiler/GHC/CmmToLlvm/CodeGen.hs
- compiler/GHC/Core.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/Coercion/Opt.hs
- compiler/GHC/Core/Lint.hs
- + compiler/GHC/Core/Lint/SubstTypeLets.hs
- compiler/GHC/Core/Make.hs
- compiler/GHC/Core/Opt/Arity.hs
- compiler/GHC/Core/Opt/ConstantFold.hs
- compiler/GHC/Core/Opt/FloatIn.hs
- compiler/GHC/Core/Opt/FloatOut.hs
- compiler/GHC/Core/Opt/Monad.hs
- compiler/GHC/Core/Opt/OccurAnal.hs
- compiler/GHC/Core/Opt/Simplify/Env.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Opt/Simplify/Utils.hs
- compiler/GHC/Core/Opt/SpecConstr.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Core/Opt/WorkWrap/Utils.hs
- compiler/GHC/Core/Ppr.hs
- compiler/GHC/Core/Rules.hs
- compiler/GHC/Core/SimpleOpt.hs
- compiler/GHC/Core/Subst.hs
- compiler/GHC/Core/TyCo/Subst.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Data/FastString.hs
- compiler/GHC/Data/List/SetOps.hs
- compiler/GHC/Data/Pair.hs
- compiler/GHC/Driver/Backend.hs
- compiler/GHC/Driver/Backpack.hs
- compiler/GHC/Driver/CodeOutput.hs
- compiler/GHC/Driver/Config.hs
- compiler/GHC/Driver/Config/Core/Lint.hs
- compiler/GHC/Driver/Config/Interpreter.hs
- compiler/GHC/Driver/Downsweep.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Env/Types.hs
- compiler/GHC/Driver/Errors/Ppr.hs
- compiler/GHC/Driver/Errors/Types.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Main.hs
- + compiler/GHC/Driver/Main/Compile.hs
- compiler/GHC/Driver/Main.hs-boot → compiler/GHC/Driver/Main/Compile.hs-boot
- + compiler/GHC/Driver/Main/Hsc.hs
- + compiler/GHC/Driver/Main/Interactive.hs
- + compiler/GHC/Driver/Main/Passes.hs
- + compiler/GHC/Driver/Main/Passes.hs-boot
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/MakeAction.hs
- compiler/GHC/Driver/MakeSem.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Driver/Pipeline/Monad.hs
- compiler/GHC/Driver/Pipeline/Phases.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Basic.hs
- compiler/GHC/Hs/Binds.hs
- compiler/GHC/Hs/Decls.hs
- compiler/GHC/Hs/Dump.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/Expr.hs-boot
- compiler/GHC/Hs/ImpExp.hs
- compiler/GHC/Hs/Instances.hs
- compiler/GHC/Hs/Lit.hs
- compiler/GHC/Hs/Pat.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/Hs/Utils.hs
- compiler/GHC/HsToCore.hs
- compiler/GHC/HsToCore/Coverage.hs
- compiler/GHC/HsToCore/Docs.hs
- compiler/GHC/HsToCore/Errors/Ppr.hs
- compiler/GHC/HsToCore/Errors/Types.hs
- compiler/GHC/HsToCore/Expr.hs
- compiler/GHC/HsToCore/Foreign/JavaScript.hs
- compiler/GHC/HsToCore/Match.hs
- compiler/GHC/HsToCore/Match/Literal.hs
- compiler/GHC/HsToCore/Monad.hs
- compiler/GHC/HsToCore/Pmc.hs
- compiler/GHC/HsToCore/Pmc/Desugar.hs
- compiler/GHC/HsToCore/Pmc/Solver.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/HsToCore/Ticks.hs
- compiler/GHC/HsToCore/Types.hs
- compiler/GHC/Iface/Binary.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Iface/Load.hs
- compiler/GHC/Iface/Syntax.hs
- compiler/GHC/Iface/Tidy.hs
- compiler/GHC/Iface/Warnings.hs
- compiler/GHC/IfaceToCore.hs
- compiler/GHC/Linker/Executable.hs
- compiler/GHC/Linker/Loader.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Annotation.hs
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Errors/Types.hs
- compiler/GHC/Parser/HaddockLex.x
- compiler/GHC/Parser/Lexer.x
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Parser/PostProcess/Haddock.hs
- compiler/GHC/Parser/Types.hs
- compiler/GHC/Platform.hs
- compiler/GHC/Platform/Tag.hs
- compiler/GHC/Rename/Bind.hs
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Rename/Expr.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/Rename/Lit.hs
- compiler/GHC/Rename/Module.hs
- compiler/GHC/Rename/Names.hs
- compiler/GHC/Rename/Pat.hs
- compiler/GHC/Rename/Utils.hs
- compiler/GHC/Runtime/Eval.hs
- compiler/GHC/Runtime/Heap/Inspect.hs
- compiler/GHC/Runtime/Interpreter.hs
- compiler/GHC/Runtime/Interpreter/Types/SymbolCache.hs
- compiler/GHC/Runtime/Loader.hs
- compiler/GHC/Settings.hs
- compiler/GHC/Settings/Constants.hs
- compiler/GHC/Settings/IO.hs
- compiler/GHC/Stg/Debug.hs
- compiler/GHC/Stg/Pipeline.hs
- compiler/GHC/StgToByteCode.hs
- compiler/GHC/StgToCmm.hs
- compiler/GHC/StgToCmm/Bind.hs
- compiler/GHC/StgToCmm/Closure.hs
- compiler/GHC/StgToCmm/DataCon.hs
- compiler/GHC/StgToCmm/Env.hs
- compiler/GHC/StgToCmm/Expr.hs
- compiler/GHC/StgToCmm/Foreign.hs
- compiler/GHC/StgToCmm/Heap.hs
- compiler/GHC/StgToCmm/InfoTableProv.hs
- compiler/GHC/StgToCmm/Layout.hs
- compiler/GHC/StgToCmm/Prim.hs
- compiler/GHC/StgToCmm/Prof.hs
- compiler/GHC/StgToCmm/Ticky.hs
- compiler/GHC/StgToCmm/Utils.hs
- compiler/GHC/StgToJS/Ids.hs
- compiler/GHC/StgToJS/Prim.hs
- compiler/GHC/SysTools/Cpp.hs
- compiler/GHC/Tc/Errors.hs
- compiler/GHC/Tc/Errors/Hole.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Bind.hs
- compiler/GHC/Tc/Gen/Export.hs
- compiler/GHC/Tc/Gen/Head.hs
- compiler/GHC/Tc/Gen/HsType.hs
- compiler/GHC/Tc/Gen/Pat.hs
- compiler/GHC/Tc/Gen/Sig.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Tc/Solver/Default.hs
- compiler/GHC/Tc/Solver/Rewrite.hs
- compiler/GHC/Tc/Solver/Solve.hs
- compiler/GHC/Tc/Types.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Utils/Backpack.hs
- compiler/GHC/Tc/Utils/Instantiate.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/Error.hs
- compiler/GHC/Types/Error.hs-boot
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/ForeignStubs.hs
- compiler/GHC/Types/Hint.hs
- compiler/GHC/Types/Hint/Ppr.hs
- compiler/GHC/Types/HpcInfo.hs
- compiler/GHC/Types/Id/Make.hs
- compiler/GHC/Types/Name/Cache.hs
- compiler/GHC/Types/Name/Reader.hs
- compiler/GHC/Types/PkgQual.hs
- compiler/GHC/Types/SourceText.hs
- compiler/GHC/Types/Tickish.hs
- compiler/GHC/Types/Unique.hs
- compiler/GHC/Types/Unique/DSet.hs
- compiler/GHC/Types/Unique/Supply.hs
- compiler/GHC/Unit/Finder.hs
- compiler/GHC/Unit/Module/Deps.hs
- compiler/GHC/Unit/Module/Graph.hs
- compiler/GHC/Unit/Module/ModGuts.hs
- compiler/GHC/Unit/Module/Warnings.hs
- compiler/GHC/Unit/State.hs
- compiler/GHC/Utils/Binary.hs
- compiler/GHC/Utils/Misc.hs
- compiler/GHC/Utils/Ppr/Colour.hs
- compiler/Language/Haskell/Syntax/Binds.hs
- compiler/Language/Haskell/Syntax/Binds/InlinePragma.hs
- compiler/Language/Haskell/Syntax/Decls.hs
- compiler/Language/Haskell/Syntax/Decls/Foreign.hs
- compiler/Language/Haskell/Syntax/Expr.hs
- compiler/Language/Haskell/Syntax/Extension.hs
- compiler/Language/Haskell/Syntax/ImpExp.hs
- compiler/Language/Haskell/Syntax/Lit.hs
- compiler/Language/Haskell/Syntax/Pat.hs
- compiler/Language/Haskell/Syntax/Type.hs
- compiler/ghc.cabal.in
- configure.ac
- distrib/configure.ac.in
- − docs/users_guide/10.0.1-notes.rst
- + docs/users_guide/10.2.1-notes.rst
- − docs/users_guide/9.16.1-notes.rst
- docs/users_guide/conf.py
- docs/users_guide/debug-info.rst
- docs/users_guide/extending_ghc.rst
- docs/users_guide/exts/explicit_namespaces.rst
- docs/users_guide/exts/linear_types.rst
- docs/users_guide/exts/modifiers.rst
- docs/users_guide/exts/qualified_strings.rst
- docs/users_guide/exts/required_type_arguments.rst
- docs/users_guide/exts/stolen_syntax.rst
- docs/users_guide/exts/template_haskell.rst
- docs/users_guide/ghc_config.py.in
- − docs/users_guide/ghc_packages.py
- docs/users_guide/packages.rst
- docs/users_guide/profiling.rst
- docs/users_guide/release-notes.rst
- docs/users_guide/runtime_control.rst
- docs/users_guide/using-warnings.rst
- docs/users_guide/using.rst
- ghc/GHC/Driver/Session/Mode.hs
- ghc/GHCi/UI.hs
- ghc/GHCi/UI/Info.hs
- ghc/Main.hs
- ghc/ghc-bin.cabal.in
- hadrian/README.md
- hadrian/build-cabal
- hadrian/build-cabal.bat
- hadrian/cfg/default.host.target.in
- hadrian/cfg/default.target.in
- hadrian/doc/flavours.md
- hadrian/doc/make.md
- hadrian/doc/testsuite.md
- hadrian/doc/user-settings.md
- hadrian/hadrian.cabal
- hadrian/src/Builder.hs
- hadrian/src/CommandLine.hs
- hadrian/src/Flavour.hs
- hadrian/src/Flavour/Type.hs
- hadrian/src/Hadrian/Builder.hs
- hadrian/src/Hadrian/Builder/Ar.hs
- hadrian/src/Hadrian/Haskell/Cabal/Parse.hs
- hadrian/src/Hadrian/Haskell/Cabal/Type.hs
- hadrian/src/Hadrian/Utilities.hs
- hadrian/src/Main.hs
- hadrian/src/Packages.hs
- hadrian/src/Rules/BinaryDist.hs
- + hadrian/src/Rules/Changelog.hs
- hadrian/src/Rules/Documentation.hs
- hadrian/src/Rules/Generate.hs
- hadrian/src/Rules/Library.hs
- hadrian/src/Rules/Register.hs
- hadrian/src/Rules/Rts.hs
- hadrian/src/Rules/Test.hs
- hadrian/src/Settings.hs
- hadrian/src/Settings/Builders/Ghc.hs
- hadrian/src/Settings/Builders/RunTest.hs
- hadrian/src/Settings/Default.hs
- hadrian/src/Settings/Packages.hs
- libraries/array
- libraries/base/base.cabal.in
- libraries/base/changelog.md
- libraries/base/src/Control/Concurrent.hs
- libraries/base/src/Control/Exception.hs
- libraries/base/src/Control/Monad/IO/Class.hs
- libraries/base/src/Data/Data.hs
- libraries/base/src/Data/Fixed.hs
- libraries/base/src/Data/Functor/Classes.hs
- libraries/base/src/Data/Functor/Compose.hs
- libraries/base/src/Data/List/NonEmpty.hs
- libraries/base/src/Data/Version.hs
- libraries/base/src/GHC/Base.hs
- libraries/base/src/GHC/ByteOrder.hs
- libraries/base/src/GHC/Exts.hs
- libraries/base/src/GHC/IO/Handle.hs
- libraries/base/src/Numeric.hs
- libraries/base/src/Prelude.hs
- libraries/base/src/System/IO.hs
- libraries/base/src/System/Timeout.hs
- libraries/base/src/Text/Printf.hs
- libraries/base/src/Text/Read.hs
- + libraries/base/tests/perf/ElemFusionUnknownList.hs
- + libraries/base/tests/perf/ElemFusionUnknownList_O1.stderr
- + libraries/base/tests/perf/ElemFusionUnknownList_O2.stderr
- + libraries/base/tests/perf/ElemNoFusion.hs
- + libraries/base/tests/perf/ElemNoFusion_O1.stderr
- + libraries/base/tests/perf/ElemNoFusion_O2.stderr
- − libraries/base/tests/perf/Makefile
- libraries/base/tests/perf/T17752.hs
- − libraries/base/tests/perf/T17752.stdout
- + libraries/base/tests/perf/T17752_O1.stderr
- + libraries/base/tests/perf/T17752_O2.stderr
- libraries/base/tests/perf/all.T
- libraries/deepseq
- libraries/directory
- libraries/exceptions
- libraries/file-io
- libraries/filepath
- libraries/ghc-bignum/ghc-bignum.cabal
- libraries/ghc-boot-th/ghc-boot-th.cabal.in
- + libraries/ghc-boot/GHC/Data/ShortByteString.hs
- libraries/ghc-boot/GHC/Settings/Utils.hs
- libraries/ghc-boot/GHC/Unit/Database.hs
- libraries/ghc-boot/ghc-boot.cabal.in
- libraries/ghc-compact/ghc-compact.cabal
- libraries/ghc-experimental/ghc-experimental.cabal.in
- libraries/ghc-experimental/src/Data/Sum/Experimental.hs
- libraries/ghc-experimental/src/Data/Tuple/Experimental.hs
- libraries/ghc-heap/tests/tso_and_stack_closures.hs
- libraries/ghc-internal/bignum-backend.rst
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/include/CTypes.h
- libraries/ghc-internal/src/GHC/Internal/Base.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend.hs
- − libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/Check.hs
- − libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/FFI.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/Native.hs
- − libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/Selected.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Data.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Version.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Windows.hsc
- libraries/ghc-internal/src/GHC/Internal/Exts.hs
- libraries/ghc-internal/src/GHC/Internal/Float.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Device.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Types.hs
- libraries/ghc-internal/src/GHC/Internal/IO/IOMode.hs
- libraries/ghc-internal/src/GHC/Internal/List.hs
- libraries/ghc-internal/src/GHC/Internal/Numeric.hs
- libraries/ghc-internal/src/GHC/Internal/RTS/Flags.hsc
- libraries/ghc-internal/src/GHC/Internal/Read.hs
- libraries/ghc-internal/src/GHC/Internal/System/IO.hs
- − libraries/ghc-internal/src/GHC/Internal/Text/Read.hs
- libraries/ghc-internal/src/GHC/Internal/Types.hs
- libraries/ghc-prim/changelog.md
- libraries/ghc-prim/ghc-prim.cabal
- + libraries/ghci/GHCi/Coverage.hs
- libraries/ghci/GHCi/CreateBCO.hs
- libraries/ghci/GHCi/Message.hs
- libraries/ghci/GHCi/ResolvedBCO.hs
- libraries/ghci/GHCi/Run.hs
- libraries/ghci/GHCi/TH.hs
- libraries/ghci/ghci.cabal.in
- libraries/haskeline
- libraries/hpc
- libraries/os-string
- libraries/parsec
- libraries/process
- libraries/semaphore-compat
- libraries/stm
- libraries/template-haskell-lift
- libraries/template-haskell-quasiquoter
- libraries/template-haskell/template-haskell.cabal.in
- libraries/terminfo
- libraries/unix
- m4/find_llvm_prog.m4
- m4/fp_setup_project_version.m4
- m4/fp_setup_windows_toolchain.m4
- m4/fptools_ghc_version.m4
- m4/ghc_toolchain.m4
- m4/prep_target_file.m4
- rts/.gitignore
- rts/Disassembler.c
- rts/Hpc.c
- rts/IOManager.h
- rts/IPE.c
- rts/Interpreter.c
- rts/Linker.c
- rts/LinkerInternals.h
- rts/Messages.c
- rts/PrimOps.cmm
- rts/RtsFlags.c
- rts/RtsSymbols.c
- rts/RtsSymbols.h
- rts/StgMiscClosures.cmm
- rts/ThreadPaused.c
- rts/Threads.c
- rts/Threads.h
- rts/Trace.c
- rts/Trace.h
- rts/Updates.h
- rts/include/Rts.h
- rts/include/rts/Bytecodes.h
- rts/include/rts/EventLogWriter.h
- rts/include/rts/Flags.h
- rts/include/rts/storage/ClosureMacros.h
- rts/include/rts/storage/Closures.h
- rts/include/stg/MiscClosures.h
- rts/linker/Elf.c
- + rts/posix/FdWakeup.c
- + rts/posix/FdWakeup.h
- rts/posix/Ticker.c
- − rts/posix/ticker/Pthread.c
- − rts/posix/ticker/TimerFd.c
- rts/rts.cabal
- rts/sm/BlockAlloc.c
- rts/sm/MBlock.c
- rts/sm/NonMoving.c
- + rts/win32/libHSghc-internal.def.in
- testsuite/driver/runtests.py
- testsuite/driver/testglobals.py
- testsuite/driver/testlib.py
- testsuite/mk/boilerplate.mk
- + testsuite/tests/MiniQuickCheck.hs
- testsuite/tests/cabal/Makefile
- testsuite/tests/cabal/all.T
- + testsuite/tests/cabal/ghcpkg10.stdout
- testsuite/tests/codeGen/should_compile/T25177.stderr
- + testsuite/tests/codeGen/should_gen_asm/aarch64-shl-subword.asm
- + testsuite/tests/codeGen/should_gen_asm/aarch64-shl-subword.hs
- + testsuite/tests/codeGen/should_gen_asm/aarch64-ushr-subword.asm
- + testsuite/tests/codeGen/should_gen_asm/aarch64-ushr-subword.hs
- testsuite/tests/codeGen/should_gen_asm/all.T
- testsuite/tests/codeGen/should_run/T23146/T23146_liftedeq.hs
- + testsuite/tests/codeGen/should_run/T23146/T25636.script
- + testsuite/tests/codeGen/should_run/T23146/T25636.stdout
- testsuite/tests/codeGen/should_run/T23146/all.T
- + testsuite/tests/codeGen/should_run/T25636a/T25636a.script
- + testsuite/tests/codeGen/should_run/T25636a/T25636a.stdout
- + testsuite/tests/codeGen/should_run/T25636a/all.T
- + testsuite/tests/codeGen/should_run/T25636b/T25636b.script
- + testsuite/tests/codeGen/should_run/T25636b/T25636b.stdout
- + testsuite/tests/codeGen/should_run/T25636b/all.T
- + testsuite/tests/codeGen/should_run/T25636c/T25636c.script
- + testsuite/tests/codeGen/should_run/T25636c/T25636c.stdout
- + testsuite/tests/codeGen/should_run/T25636c/all.T
- + testsuite/tests/codeGen/should_run/T25636d/T25636d.script
- + testsuite/tests/codeGen/should_run/T25636d/T25636d.stdout
- + testsuite/tests/codeGen/should_run/T25636d/all.T
- + testsuite/tests/codeGen/should_run/T25636e/T25636e.script
- + testsuite/tests/codeGen/should_run/T25636e/T25636e.stdout
- + testsuite/tests/codeGen/should_run/T25636e/all.T
- + testsuite/tests/codeGen/should_run/T27072d.hs
- + testsuite/tests/codeGen/should_run/T27072d.stdout
- + testsuite/tests/codeGen/should_run/T27072d_c.c
- + testsuite/tests/codeGen/should_run/T27072d_check.c
- + testsuite/tests/codeGen/should_run/T27072w.hs
- + testsuite/tests/codeGen/should_run/T27072w.stdout
- + testsuite/tests/codeGen/should_run/T27072w_c.c
- + testsuite/tests/codeGen/should_run/aarch64-subword-ops.hs
- + testsuite/tests/codeGen/should_run/aarch64-subword-ops.stdout
- + testsuite/tests/codeGen/should_run/aarch64-ushr-subword-run.hs
- + testsuite/tests/codeGen/should_run/aarch64-ushr-subword-run.stdout
- testsuite/tests/codeGen/should_run/all.T
- testsuite/tests/corelint/LintEtaExpand.stderr
- testsuite/tests/corelint/T21115b.stderr
- testsuite/tests/deSugar/should_compile/T13208.stdout
- + testsuite/tests/deSugar/should_compile/T25996.hs
- + testsuite/tests/deSugar/should_compile/T25996.stderr
- testsuite/tests/deSugar/should_compile/all.T
- testsuite/tests/diagnostic-codes/codes.stdout
- + testsuite/tests/driver/T10531/A.hs
- + testsuite/tests/driver/T10531/B.hs
- + testsuite/tests/driver/T10531/C.hs
- + testsuite/tests/driver/T10531/Makefile
- + testsuite/tests/driver/T10531/all.T
- testsuite/tests/driver/fat-iface/fat014.stdout
- testsuite/tests/ffi/should_run/all.T
- + testsuite/tests/ghc-api/T24386.hs
- testsuite/tests/ghc-api/T25121_status.stdout
- testsuite/tests/ghc-api/T26910.hs
- + testsuite/tests/ghc-api/T27273.hs
- testsuite/tests/ghc-api/T6145.hs
- testsuite/tests/ghc-api/all.T
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/A.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/B.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/C.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/D.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/X.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/Y.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/Z.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.stdout
- testsuite/tests/ghc-api/downsweep/OldModLocation.hs
- testsuite/tests/ghc-api/downsweep/PartialDownsweep.hs
- testsuite/tests/ghc-api/downsweep/all.T
- testsuite/tests/ghc-api/fixed-nodes/InterfaceModuleGraph.hs
- + testsuite/tests/ghc-api/settings/LibDir.hs
- + testsuite/tests/ghc-api/settings/LibDir.stdout
- + testsuite/tests/ghc-api/settings/all.T
- testsuite/tests/ghci.debugger/scripts/print034.stdout
- + testsuite/tests/ghci/T9074/Makefile
- + testsuite/tests/ghci/T9074/T9074.hs
- + testsuite/tests/ghci/T9074/T9074.stdout
- + testsuite/tests/ghci/T9074/T9074a.c
- + testsuite/tests/ghci/T9074/T9074b.c
- + testsuite/tests/ghci/T9074/all.T
- + testsuite/tests/ghci/prog-mhu006/Makefile
- + testsuite/tests/ghci/prog-mhu006/a/A.hs
- + testsuite/tests/ghci/prog-mhu006/all.T
- + testsuite/tests/ghci/prog-mhu006/b/B.hs
- + testsuite/tests/ghci/prog-mhu006/prog-mhu006a.script
- + testsuite/tests/ghci/prog-mhu006/prog-mhu006a.stdout
- + testsuite/tests/ghci/prog-mhu006/unitA
- + testsuite/tests/ghci/prog-mhu006/unitB
- testsuite/tests/ghci/prog003/prog003.script
- testsuite/tests/ghci/prog018/prog018.stdout
- testsuite/tests/ghci/prog020/Makefile
- testsuite/tests/ghci/prog020/all.T
- testsuite/tests/ghci/prog020/ghci.prog020.script → testsuite/tests/ghci/prog020/ghci.prog020a.script
- testsuite/tests/ghci/prog020/ghci.prog020.stderr → testsuite/tests/ghci/prog020/ghci.prog020a.stderr
- testsuite/tests/ghci/prog020/ghci.prog020.stdout → testsuite/tests/ghci/prog020/ghci.prog020a.stdout
- + testsuite/tests/ghci/prog020/ghci.prog020b.script
- + testsuite/tests/ghci/prog020/ghci.prog020b.stderr
- + testsuite/tests/ghci/prog020/ghci.prog020b.stdout
- + testsuite/tests/ghci/prog023/Makefile
- + testsuite/tests/ghci/prog023/all.T
- + testsuite/tests/ghci/prog023/prog023a.script
- + testsuite/tests/ghci/prog023/prog023a.stdout
- + testsuite/tests/ghci/prog023/prog023b.script
- + testsuite/tests/ghci/prog023/prog023b.stdout
- + testsuite/tests/ghci/prog023/src/A.hs
- + testsuite/tests/ghci/prog024/Makefile
- + testsuite/tests/ghci/prog024/all.T
- + testsuite/tests/ghci/prog024/prog024a.script
- + testsuite/tests/ghci/prog024/prog024a.stdout
- + testsuite/tests/ghci/prog024/prog024b.script
- + testsuite/tests/ghci/prog024/prog024b.stdout
- + testsuite/tests/ghci/prog024/prog024c.script
- + testsuite/tests/ghci/prog024/prog024c.stderr
- + testsuite/tests/ghci/prog024/prog024c.stdout
- + testsuite/tests/ghci/prog024/prog024d.script
- + testsuite/tests/ghci/prog024/prog024d.stderr
- + testsuite/tests/ghci/prog024/prog024d.stdout
- + testsuite/tests/ghci/prog024/prog024e.script
- + testsuite/tests/ghci/prog024/prog024e.stdout
- + testsuite/tests/ghci/prog024/prog024f.script
- + testsuite/tests/ghci/prog024/prog024f.stdout
- + testsuite/tests/ghci/prog024/src/A.hs
- + testsuite/tests/ghci/prog024/src/B.hs
- + testsuite/tests/ghci/prog025/Makefile
- + testsuite/tests/ghci/prog025/a/A.hs
- + testsuite/tests/ghci/prog025/all.T
- + testsuite/tests/ghci/prog025/prog025a.script
- + testsuite/tests/ghci/prog025/prog025a.stdout
- + testsuite/tests/ghci/prog025/prog025b.script
- + testsuite/tests/ghci/prog025/prog025b.stdout
- + testsuite/tests/ghci/prog025/testpkg/Test.hs
- + testsuite/tests/ghci/prog025/testpkg/testpkg-0.1.0.0.pkg
- + testsuite/tests/ghci/prog025/testpkg/testpkg-0.2.0.0.pkg
- + testsuite/tests/ghci/prog025/unitA
- testsuite/tests/ghci/scripts/ListTuplePunsPprNoAbbrevTuple.stdout
- testsuite/tests/ghci/scripts/T13997.stdout
- testsuite/tests/ghci/scripts/T1914.stdout
- testsuite/tests/ghci/scripts/T20217.stdout
- + testsuite/tests/ghci/scripts/T26233.script
- + testsuite/tests/ghci/scripts/T26233.stderr
- + testsuite/tests/ghci/scripts/T26233.stdout
- testsuite/tests/ghci/scripts/T8042.stdout
- testsuite/tests/ghci/scripts/T8042recomp.stdout
- testsuite/tests/ghci/scripts/all.T
- testsuite/tests/ghci/should_run/T10920.stderr
- + testsuite/tests/ghci/should_run/T25636f.hs
- + testsuite/tests/ghci/should_run/T25636f.stdout
- testsuite/tests/ghci/should_run/all.T
- testsuite/tests/ghci/should_run/tc-plugin-ghci/TcPluginGHCi.hs
- testsuite/tests/haddock/should_compile_flag_haddock/T17544_kw.stderr
- testsuite/tests/hpc/Makefile
- testsuite/tests/hpc/T17073.stdout → testsuite/tests/hpc/T17073a.stdout
- + testsuite/tests/hpc/T17073b.stdout
- testsuite/tests/hpc/T20568.stdout → testsuite/tests/hpc/T20568a.stdout
- + testsuite/tests/hpc/T20568b.stdout
- testsuite/tests/hpc/all.T
- testsuite/tests/hpc/fork/Makefile
- testsuite/tests/hpc/function/Makefile
- testsuite/tests/hpc/function/test.T
- + testsuite/tests/hpc/function/tough1.stderr
- + testsuite/tests/hpc/function/tough1.stdout
- testsuite/tests/hpc/function2/test.T
- + testsuite/tests/hpc/function2/tough3.script
- + testsuite/tests/hpc/ghc_ghci/BytecodeMain.hs
- testsuite/tests/hpc/ghc_ghci/Makefile
- + testsuite/tests/hpc/ghc_ghci/hpc_ghc_ghci_bytecode.stdout
- + testsuite/tests/hpc/ghc_ghci/hpc_ghci01.stdout
- + testsuite/tests/hpc/ghc_ghci/hpc_ghci02.stdout
- testsuite/tests/hpc/ghc_ghci/test.T
- testsuite/tests/hpc/simple/Makefile
- + testsuite/tests/hpc/simple/hpc002.hs
- + testsuite/tests/hpc/simple/hpc002.stdout
- + testsuite/tests/hpc/simple/hpc003.hs
- + testsuite/tests/hpc/simple/hpc003.script
- + testsuite/tests/hpc/simple/hpc003.stdout
- testsuite/tests/hpc/simple/test.T
- + testsuite/tests/interface-stability/.gitignore
- testsuite/tests/interface-stability/README.mkd
- testsuite/tests/interface-stability/base-exports.stdout
- testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs
- testsuite/tests/interface-stability/base-exports.stdout-mingw32
- − testsuite/tests/interface-stability/base-exports.stdout-ws-32
- + testsuite/tests/interface-stability/download-base-exports.sh
- testsuite/tests/interface-stability/ghc-experimental-exports.stdout
- testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32
- testsuite/tests/interface-stability/ghc-prim-exports.stdout
- testsuite/tests/interface-stability/ghc-prim-exports.stdout-mingw32
- testsuite/tests/linters/Makefile
- testsuite/tests/linters/all.T
- + testsuite/tests/linters/changelog-d.stdout
- testsuite/tests/linters/notes.stdout
- testsuite/tests/numeric/should_compile/T15547.stderr
- testsuite/tests/numeric/should_compile/T20347.stderr
- testsuite/tests/numeric/should_compile/T20374.stderr
- testsuite/tests/numeric/should_compile/T20376.stderr
- testsuite/tests/numeric/should_run/all.T
- testsuite/tests/numeric/should_run/foundation.hs
- + testsuite/tests/overloadedstrings/should_fail/T25926.hs
- + testsuite/tests/overloadedstrings/should_fail/T25926.stderr
- + testsuite/tests/overloadedstrings/should_fail/T27124.hs
- + testsuite/tests/overloadedstrings/should_fail/T27124.stderr
- + testsuite/tests/overloadedstrings/should_fail/all.T
- + testsuite/tests/overloadedstrings/should_run/T27124a.hs
- testsuite/tests/overloadedstrings/should_run/all.T
- testsuite/tests/parser/should_compile/DumpParsedAst.stderr
- testsuite/tests/parser/should_compile/DumpRenamedAst.stderr
- testsuite/tests/parser/should_compile/KindSigs.stderr
- testsuite/tests/parser/should_compile/ListTuplePunsSuccess1.hs
- testsuite/tests/parser/should_compile/T20452.stderr
- testsuite/tests/parser/should_compile/T20846.stderr
- testsuite/tests/parser/should_compile/all.T
- + testsuite/tests/parser/should_fail/ListTuplePunsFail6.hs
- + testsuite/tests/parser/should_fail/ListTuplePunsFail6.stderr
- testsuite/tests/parser/should_fail/all.T
- testsuite/tests/parser/should_run/ListTuplePunsConstraints.hs
- testsuite/tests/perf/compiler/Makefile
- + testsuite/tests/perf/compiler/T26989.hs
- + testsuite/tests/perf/compiler/T26989a.hs
- testsuite/tests/perf/compiler/all.T
- testsuite/tests/perf/compiler/genMultiComp.py
- + testsuite/tests/perf/should_run/T11226.hs
- + testsuite/tests/perf/should_run/T11226.stdout
- testsuite/tests/perf/should_run/all.T
- testsuite/tests/plugins/defaulting-plugin/DefaultInterference.hs
- testsuite/tests/plugins/defaulting-plugin/DefaultInvalid.hs
- testsuite/tests/plugins/defaulting-plugin/DefaultLifted.hs
- testsuite/tests/plugins/defaulting-plugin/DefaultMultiParam.hs
- testsuite/tests/plugins/echo-plugin/Echo.hs
- testsuite/tests/plugins/plugins09.stdout
- testsuite/tests/plugins/plugins10.stdout
- testsuite/tests/plugins/plugins11.stdout
- testsuite/tests/plugins/static-plugins.stdout
- testsuite/tests/printer/Makefile
- + testsuite/tests/printer/PprInfixHole.hs
- testsuite/tests/printer/PprModifiers.hs
- + testsuite/tests/printer/PprQualifiedStrings.hs
- testsuite/tests/printer/T18052a.stderr
- + testsuite/tests/printer/Test27291.hs
- testsuite/tests/printer/all.T
- + testsuite/tests/profiling/should_compile/T27121.hs
- + testsuite/tests/profiling/should_compile/T27121_aux.hs
- testsuite/tests/profiling/should_compile/all.T
- testsuite/tests/profiling/should_run/callstack001.stdout
- testsuite/tests/quasiquotation/T7918.hs
- + testsuite/tests/rts/T25275/DebugIpe.hs
- + testsuite/tests/rts/T25275/T25275_A.stdout
- + testsuite/tests/rts/T25275/T25275_B.stdout
- + testsuite/tests/rts/T25275/T25275_C.stdout
- + testsuite/tests/rts/T25275/T25275_D.stdout
- + testsuite/tests/rts/T25275/TraceIpe.hs
- + testsuite/tests/rts/T25275/all.T
- + testsuite/tests/rts/T27131.hs
- + testsuite/tests/rts/T27131.stdout
- + testsuite/tests/rts/T27131_c.c
- testsuite/tests/rts/all.T
- + testsuite/tests/rts/linker/T27072/Lib.c
- + testsuite/tests/rts/linker/T27072/Makefile
- + testsuite/tests/rts/linker/T27072/T27072.stdout
- + testsuite/tests/rts/linker/T27072/all.T
- + testsuite/tests/rts/linker/T27072/main.c
- + testsuite/tests/simd/should_run/Makefile
- + testsuite/tests/simd/should_run/T25030.hs
- + testsuite/tests/simd/should_run/T25030.stdout
- testsuite/tests/simd/should_run/all.T
- testsuite/tests/simd/should_run/simd006.hs
- testsuite/tests/simplCore/should_compile/DsSpecPragmas.stderr
- testsuite/tests/simplCore/should_compile/RewriteHigherOrderPatterns.stderr
- testsuite/tests/simplCore/should_compile/T15205.stderr
- testsuite/tests/simplCore/should_compile/T18668.stderr
- testsuite/tests/simplCore/should_compile/T19246.stderr
- testsuite/tests/simplCore/should_compile/T19599.stderr
- testsuite/tests/simplCore/should_compile/T19599a.stderr
- testsuite/tests/simplCore/should_compile/T21917.stderr
- testsuite/tests/simplCore/should_compile/T23074.stderr
- testsuite/tests/simplCore/should_compile/T24359a.stderr
- testsuite/tests/simplCore/should_compile/T25160.stderr
- testsuite/tests/simplCore/should_compile/T25718c.stderr-ws-32
- testsuite/tests/simplCore/should_compile/T25718c.stderr-ws-64
- testsuite/tests/simplCore/should_compile/T26051.stderr
- testsuite/tests/simplCore/should_compile/T26116.stderr
- + testsuite/tests/simplCore/should_compile/T26941.hs
- + testsuite/tests/simplCore/should_compile/T26941_aux.hs
- + testsuite/tests/simplCore/should_compile/T27261.hs
- + testsuite/tests/simplCore/should_compile/T27261_aux.hs
- testsuite/tests/simplCore/should_compile/T8331.stderr
- testsuite/tests/simplCore/should_compile/T8848a.stderr
- testsuite/tests/simplCore/should_compile/all.T
- testsuite/tests/simplCore/should_compile/spec004.stderr
- testsuite/tests/tcplugins/Common.hs
- testsuite/tests/tcplugins/RewritePerfPlugin.hs
- testsuite/tests/tcplugins/T11462_Plugin.hs
- testsuite/tests/tcplugins/T11525_Plugin.hs
- testsuite/tests/tcplugins/T26395_Plugin.hs
- + testsuite/tests/tcplugins/TcPlugin_InitStop_Ghci.hs
- + testsuite/tests/tcplugins/TcPlugin_InitStop_Ghci.script
- + testsuite/tests/tcplugins/TcPlugin_InitStop_Ghci.stderr
- + testsuite/tests/tcplugins/TcPlugin_InitStop_Ghci.stdout
- + testsuite/tests/tcplugins/TcPlugin_InitStop_NoCode.hs
- + testsuite/tests/tcplugins/TcPlugin_InitStop_NoCode.hs-boot
- + testsuite/tests/tcplugins/TcPlugin_InitStop_NoCode.stderr
- + testsuite/tests/tcplugins/TcPlugin_InitStop_NoCode_aux.hs
- + testsuite/tests/tcplugins/TcPlugin_InitStop_Warn.hs
- + testsuite/tests/tcplugins/TcPlugin_InitStop_Warn.stderr
- testsuite/tests/tcplugins/all.T
- + testsuite/tests/tcplugins/tc-plugin-initstop/Makefile
- + testsuite/tests/tcplugins/tc-plugin-initstop/Setup.hs
- + testsuite/tests/tcplugins/tc-plugin-initstop/TcPlugin_InitStop_Plugin.hs
- + testsuite/tests/tcplugins/tc-plugin-initstop/tc-plugin-initstop.cabal
- testsuite/tests/th/T24111.stdout
- + testsuite/tests/th/T27022.hs
- + testsuite/tests/th/T27022.stdout
- testsuite/tests/th/all.T
- testsuite/tests/typecheck/should_compile/T13032.stderr
- + testsuite/tests/typecheck/should_compile/T23135.hs
- testsuite/tests/typecheck/should_compile/T9497a.stderr
- testsuite/tests/typecheck/should_compile/all.T
- testsuite/tests/typecheck/should_compile/holes.stderr
- testsuite/tests/typecheck/should_compile/holes3.stderr
- testsuite/tests/typecheck/should_compile/subsumption_sort_hole_fits.stderr
- testsuite/tests/typecheck/should_compile/valid_hole_fits.stderr
- testsuite/tests/typecheck/should_fail/T21130.stderr
- + testsuite/tests/typecheck/should_fail/T27210.hs
- + testsuite/tests/typecheck/should_fail/T27210.stderr
- testsuite/tests/typecheck/should_fail/T9497d.stderr
- testsuite/tests/typecheck/should_fail/all.T
- testsuite/tests/typecheck/should_run/T9497a-run.stderr
- testsuite/tests/typecheck/should_run/T9497b-run.stderr
- testsuite/tests/typecheck/should_run/T9497c-run.stderr
- testsuite/tests/wasm/should_run/control-flow/LoadCmmGroup.hs
- + utils/changelog-d/ChangelogD.hs
- + utils/changelog-d/LICENSE
- + utils/changelog-d/README.md
- + utils/changelog-d/changelog-d.cabal
- utils/check-exact/ExactPrint.hs
- utils/check-exact/Main.hs
- utils/deriveConstants/Main.hs
- utils/ghc-pkg/Main.hs
- utils/ghc-pkg/ghc-pkg.cabal.in
- utils/ghc-toolchain/exe/Main.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Program.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Target.hs
- utils/haddock/haddock-api/haddock-api.cabal
- utils/haddock/haddock-api/src/Haddock/Backends/Hoogle.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Hyperlinker/Parser.hs
- utils/haddock/haddock-api/src/Haddock/Backends/LaTeX.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Decl.hs
- utils/haddock/haddock-api/src/Haddock/Convert.hs
- utils/haddock/haddock-api/src/Haddock/GhcUtils.hs
- utils/haddock/haddock-api/src/Haddock/Interface/AttachInstances.hs
- utils/haddock/haddock-api/src/Haddock/Interface/LexParseRn.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Rename.hs
- utils/haddock/haddock-api/src/Haddock/Interface/RenameType.hs
- utils/haddock/haddock-api/src/Haddock/InterfaceFile.hs
- utils/haddock/haddock-api/src/Haddock/Types.hs
- utils/haddock/haddock-library/haddock-library.cabal
- utils/haddock/haddock-test/haddock-test.cabal
- utils/haddock/haddock.cabal
- utils/haddock/html-test/ref/Bug1004.html
- utils/haddock/html-test/ref/Bug973.html
- utils/haddock/html-test/ref/ConstructorPatternExport.html
- utils/haddock/html-test/ref/DefaultSignatures.html
- utils/haddock/html-test/ref/Hash.html
- utils/haddock/html-test/ref/PatternSyns.html
- utils/haddock/html-test/ref/PatternSyns2.html
- utils/haddock/html-test/ref/QuasiExpr.html
- utils/haddock/html-test/ref/Test.html
- utils/hsc2hs
- utils/jsffi/prelude.mjs
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/7a4ebd275f15b547d7747e32046221…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/7a4ebd275f15b547d7747e32046221…
You're receiving this email because of your account on gitlab.haskell.org.
1
0
[Git][ghc/ghc] Pushed new branch wip/davide/hadrian_avoid_response_files_2
by David Eichmann (＠DavidEichmann) 01 Jun '26
by David Eichmann (＠DavidEichmann) 01 Jun '26
01 Jun '26
David Eichmann pushed new branch wip/davide/hadrian_avoid_response_files_2 at Glasgow Haskell Compiler / GHC
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/davide/hadrian_avoid_response…
You're receiving this email because of your account on gitlab.haskell.org.
1
0
[Git][ghc/ghc][wip/ani/th-rs] 131 commits: NCG: Implement constant folding for vector simd ops (Issue #25030)
by Apoorv Ingle (＠ani) 01 Jun '26
by Apoorv Ingle (＠ani) 01 Jun '26
01 Jun '26
Apoorv Ingle pushed to branch wip/ani/th-rs at Glasgow Haskell Compiler / GHC
Commits:
72d6dc74 by aparker at 2026-04-20T20:15:44-04:00
NCG: Implement constant folding for vector simd ops (Issue #25030)
- - - - -
b9cab907 by sheaf at 2026-04-20T20:15:44-04:00
Mark some SIMD tests as broken on i386 optllvm
As seen in #25498, several SIMD tests are broken on i386 in the optllvm
way. This commit marks them as "expect_broken".
- - - - -
76528cc3 by Wolfgang Jeltsch at 2026-04-20T20:16:25-04:00
Move most of the `System.IO` implementation into `base`
This involves a rewrite of the `combine` helper function to avoid the
use of `last`, which would now be flagged as an error.
Metric Decrease:
LinkableUsage01
T3294
Metric Increase:
T12227
T12707
T5642
- - - - -
04d143c0 by Luite Stegeman at 2026-04-21T14:05:33-04:00
rts: add a few missing i386 relocations in the rts linker
- - - - -
014087e7 by Luite Stegeman at 2026-04-21T14:05:34-04:00
CodeOutput: Fix finalizers on multiple platforms
- ELF platforms: emit .fini_array section
- wasm32/Darwin: emit initializer with __cxa_atexit call
- Windows: use -Wl,--whole-archive to prevent dropping finalizer symbols
- rts linker: fix crash/assertion failure unloading objects with finalizers
fixes #27072
- - - - -
915bba6f by Simon Jakobi at 2026-04-21T14:06:16-04:00
Add regression test for #10531
Closes #10531.
- - - - -
86a646a6 by Andreas Klebinger at 2026-04-22T13:00:05-04:00
Revert use of generic instances for compiler time perf reasons.
Revert "Derive Semigroup/Monoid for instances believed could be derived in #25871"
This reverts commit 11a04cbb221cc404fe00d65d7c951558ede4caa9.
Revert "add Ghc.Data.Pair deriving"
This reverts commit 15d9ce449e1be8c01b89fd39bdf1e700ea7d1dce.
- - - - -
bc9ee1cf by Wen Kokke at 2026-04-22T13:00:51-04:00
hadrian: Fix docs to remove static flavour
In 638f6548, the static flavour was turned into into the fully_static
flavour transformer. However, this commit did not update flavours.md.
- - - - -
cc9cc6d5 by Cheng Shao at 2026-04-23T09:40:46+00:00
configure: bump LlvmMaxVersion to 23
This patch bumps `LlvmMaxVersion` to 23 to support LLVM 22.x releases.
- - - - -
2ea7ef8e by Cheng Shao at 2026-04-23T09:46:26+00:00
changelog: add llvm 22.x support
- - - - -
5574ee10 by Cheng Shao at 2026-04-24T08:24:30-04:00
compiler: avoid unused temporary `appendFS` operands
This patch fixes unused temporary `appendFS` operands in the codebase
that are retained in the `FastString` table after concatenation.
Rewrite rules are added so that if an operand is
`fsLit`/`mkFastString`, the `appendFS` application is rewritten to
append the `ShortByteString` operands first. The patch also fixes
`sconcat` behavior to align with `mconcat` for the same reason. Fixes #27205.
- - - - -
4ed78760 by mangoiv at 2026-04-24T08:25:13-04:00
contributing: adjust MR template to be less verbose
- MR template only shows text that is relevant for submissiong
- MR template was rewritten so it's readable from a user's and reviewer's
perspective
Resolves #27165
Co-Authored-By: @sheaf
- - - - -
87db83e2 by Cheng Shao at 2026-04-24T14:37:21-04:00
ci: bump freebsd boot ghc to 9.10.3
This commit bumps freebsd boot ghc to 9.10.3 to align with other
platforms and prevent outdated boot libs in boot ghc to block the
freebsd job.
- - - - -
17e3a0b7 by Cheng Shao at 2026-04-24T14:37:21-04:00
compiler: improve Binary instance of Array
This patch improves the `Binary` instance of `Array`:
- We no longer allocate intermediate lists. When serializing an
`Array`, we iterate over the elements directly; when deserializing
it, we allocate the result `Array` and fill it in a loop.
- Now we only serialize the array bounds tuple; the length field is
not needed.
Closes #27109.
- - - - -
2d30f7d3 by sheaf at 2026-04-24T14:38:23-04:00
Vendor mini-QuickCheck for testsuite
This commit extracts the vendored QuickCheck implementation from the
foundation testsuite to make it more broadly available in the GHC
testsuite, and makes use of it in the simd006 test (which also used
a vendored QuickCheck implementation).
On the way, we update the linear congruential generator to avoid the
shortcoming of only generating 31 bit large numbers.
Fixes #25990 and #25969.
- - - - -
1350271b by sheaf at 2026-04-27T09:32:53-04:00
Ensure TcM plugins are only initialised once
This commit ensures we keep TcM plugins (typechecker plugins,
defaulting plugins and hole fit plugins) running all the way through
desugaring, instead of stopping them at the end of typechecking.
To do this, the "stop" actions of TcPlugin and DefaultingPlugin are
split into two: one for the "post-typecheck" action, and one for the
final shutdown action (after desugaring).
This allows the plugins to be invoked by the pattern match checker
(during desugaring) without having to be repeatedly re-initialised and
stopped, fixing #26839.
In the process, this commit modifies 'initTc' and 'initTcInteractive',
adding an extra argument that describes whether to start/stop the 'TcM'
plugins.
See Note [Stop TcM plugins after desugaring] for an overview.
- - - - -
42549222 by sheaf at 2026-04-27T09:33:50-04:00
Hadrian: add --keep-response-files
This commit adds a Hadrian flag that allows response files to be
retained. This is useful for debugging a failing Hadrian command line.
- - - - -
40564e8d by sheaf at 2026-04-27T09:34:46-04:00
hadrian/build-cabal.bat: fix build on Windows
Commit 8cb99552f6 introduced a warning for a missing package index.
However, the logic was faulty on Windows: the piping was broken, and
"remote-repo-cache:" was being interpreted as a (malformed) drive letter,
leading to the error:
The filename, directory name, or volume label syntax is incorrect.
This commit fixes that by using a temporary file instead of piping.
- - - - -
14bc71e4 by Sven Tennie at 2026-04-28T13:22:47-04:00
ghc: Distinguish between having an interpreter and having an internal one
Actually, these are related but different things:
- ghc can run an interpreter (either internal or external)
- ghc is compiled with an internal interpreter
Splitting the logic solves compiler warnings and expresses the intent
better.
- - - - -
df691563 by Vladislav Zavialov at 2026-04-28T13:23:29-04:00
Refactor HsWildCardTy to use HoleKind (#27111)
The payload of this patch is that the extension fields of HsWildCardTy
and HsHole now match:
type instance XWildCardTy Ghc{Ps,Rn} = HoleKind
type instance XHole Ghc{Ps,Rn} = HoleKind
This is progress towards unification of HsExpr and HsType.
Test case: T25121_status
In addition to that, exact-printing of infix holes is fixed.
Test case: PprInfixHole
- - - - -
f3485446 by fendor at 2026-04-28T13:24:12-04:00
Expose startupHpc as an rts symbol
- - - - -
28f07d70 by fendor at 2026-04-28T13:24:12-04:00
Make HPC work with bytecode interpreter
Add support to generate .tix files from bytecode objects and the
bytecode interpreter.
Conceptually, we insert HPC ticks into the bytecode similar to how we insert
breakpoints.
HPC and breakpoints do not share the same tick array but we use a separate
tick-array for hpc/breakpoint ticks during bytecode generation.
We teach the bytecode interpreter to handle hpc ticks.
The implementation is quite trivial, simply increment the counter in the
global hpc_ticks array for the respective module.
This hpc_ticks array is generated as part of the `CStub`, so we can rely
on it existing.
A tricky bit is "registering" a bytecode object for HPC instrumentation.
In the compiled case, this is achieved via CStub and initializer/finalizers
`.init` sections which are called when the executable is run.
After the initializers have been invoked, which is before `hs_init_ghc`,
we then call `startup_hpc` in `hs_init_ghc` iff any modules were "registered"
for hpc instrumentation via `hs_hpc_module`.
Since bytecode objects are loaded after starting up GHCi, this workflow
doesn't work for supporting `hpc` and the `hpc` run-time is never
started, even if a module is added for instrumentation.
We fix this issue by employing the same technique as is for `SptEntry`s:
* We introduce a new field to `CompiledByteCode`, called `ByteCodeHpcInfo`
which contains enough information to call `hs_hpc_module`, allowing us to
register the module for `hpc` instrumentation`.
* After registering the module, we unconditionally call `startupHpc`, to make
sure the .tix file is written.
Calling `startupHpc` multiple times is safe.
Calling `hs_hpc_module` multiple times for the same module is also safe.
If we didn't register the hpc module in this way, evaluating a bytecode object
instrumented with `-fhpc` without registering it in the `hpc` run-time will
simply not generate any `.tix` files for this bytecode object.
However, this shouldn't happen if everything is set up correctly.
Closes #27036
- - - - -
950879f0 by Vladislav Zavialov at 2026-04-28T13:24:55-04:00
Move NamespaceSpecifier from x-fields into the AST proper (#26678)
This refactoring moves NamespaceSpecifier out of extension fields and into the
AST proper, as it is part of the user-written source, and is not pass-specific.
Summary of changes:
* Move NamespaceSpecifier from GHC/Hs/Basic.hs to Language/Haskell/Syntax/ImpExp.hs
and parameterise it by the compiler pass, creating the necessary extension points
* Move NamespaceSpecifier out of XFixitySig into FixitySig
* Move NamespaceSpecifier out of XIEThingAll (IEThingAllExt) into IEThingAll
* Move NamespaceSpecifier out of XIEWholeNamespace (IEWholeNamespaceExt) into IEWholeNamespace
This is a pure refactoring with no change in behaviour.
- - - - -
9797052b by Simon Peyton Jones at 2026-04-28T13:25:37-04:00
Fix assertion check in checkResultTy
As #27210 shows, the assertion was a little bit too eager.
I refactored a bit by moving some code from GHC.Tc.Gen.App
to GHC.Tc.Utils.Unify; see the new function tcSubTypeApp,
which replaces tcSubTypeDS
- - - - -
9f85f034 by Duncan Coutts at 2026-04-30T04:52:42-04:00
Make cmm 'import "package" name;' syntax use consistent label types
There is a little-used syntactic form in cmm imports:
import "package" foo;
Which means to import foo from the given package (unit id, specified as
a string). This syntax is somewhat reminiscent of GHC's package import
extension.
This syntax form is not used in the rts cmm code, nor any of the boot
libraries. It may not be used at all. Unclear.
Change the kind of CLabel this syntax generates to be consistent with
the others. The other cmm imports use ForeignLabel with
ForeignLabelInExternalPackage. For some reason this form was using
CmmLabel. Change that to also be ForeignLabel but with
ForeignLabelInPackage. This specifies a specific package, rather
than an unnamed external package.
- - - - -
a811f68f by Duncan Coutts at 2026-04-30T04:52:42-04:00
Change default cmm import statements to be internal
Previously a cmm statement like:
import foo;
meant to expect the symbol from a different shared library than the
current one.
Now it means to expect the symbol from the same shared library as the
current one. We'll add explicit syntax to indicate that it's a foreign
import. Most existing uses are in fact intenal (rts to rts), so few
imports will need to be annotated foreign. Examples would include cmm
code in libraries (other than the rts) that need to access RTS APIs.
In practice, this makes no difference whatsoever at the moment on any
platform other than windows (where building Haskell libs as shared libs
does not fully work yet), since the 'labelDynamic' treats all such
labels as foreign, irrespective of the foreign label source.
- - - - -
17fe5d1d by Duncan Coutts at 2026-04-30T04:52:42-04:00
Add cmm import syntax 'import DATA foo;' as better name for CLOSURE
The existing syntax is:
import CLOSURE foo;
The new syntax is
import DATA foo;
This means to interpret the symbol foo as refering to data (i.e. a
global constant or variable) rather than to code (a function). The
historical syntax for this uses CLOSURE, which is rather misleading.
Presumably this was done to avoid introducing new reserved words.
Be less squemish about new reserved words and add DATA and use that.
Keep the existing CLOSURE syntax as an alias for compatibility.
- - - - -
3a530d68 by Duncan Coutts at 2026-04-30T04:52:42-04:00
Add cmm 'import extern name;' syntax
Since the default for cmm imports is now for symbols within the same
shared object, we need a way to indicate we want a symbol from an
external shared object:
import extern foo; -- for a function
import extern DATA foo; -- for data
This adds a new reserved word 'extern'.
We don't expect to have to use this much. Most cmm imports are
intra-DSO.
This makes no difference currently on ELF and MachO platforms, but does
make a difference to the linking conventions on PE (Windows).
In future it's plausible we could take make distinctions on ELF or
MachO, so it's worth trying to get it right. Windows can be the guinea
pig.
- - - - -
2b8e44c7 by Duncan Coutts at 2026-04-30T04:52:42-04:00
Add cmm syntax 'import "package" DATA foo;' for completeness
We already have:
import DATA foo; -- for data imports
import "package" foo; -- for imports from a given unitid
There's no reason not to have both at once:
import "package" DATA foo;
So add that.
- - - - -
ee05e5cc by Duncan Coutts at 2026-04-30T04:52:42-04:00
Improve the commentary for the cmm import grammar.
AFAIK, this is the only place where GHC-style Cmm syntax is documented.
- - - - -
b35946ad by Duncan Coutts at 2026-04-30T04:52:42-04:00
Add a changelog.d entry for the .cmm import syntax changes
- - - - -
d59b7c71 by Wolfgang Jeltsch at 2026-04-30T04:53:25-04:00
Move code that uses `GHC.Internal.Text.Read` into `base`
This contribution serves to remove all dependencies on
`GHC.Internal.Text.Read` from within `ghc-internal`, so that the
implementation of `Text.Read` and ultimately more reading-related code
can be moved to `base` as well.
The following things are moved from `ghc-internal` to `base`:
* I/O-related `Read` instances
* Most of the `Numeric` implementation
* The instance `Read ByteOrder`
* The `parseVersion` operation
* The `readConstr` operation
Metric Increase:
LinkableUsage01
T9198
T12425
T13035
T13820
T18140
- - - - -
5bd6a964 by Rodrigo Mesquita at 2026-04-30T04:54:08-04:00
New rts Message to {set,unset} TSO flags
This commit introduces stg_MSG_SET_TSO_FLAG_info and
stg_MSG_UNSET_TSO_FLAG_info, which allows setting flags of a TSO other
than yourself.
This is especially useful/necessary to set breakpoints and toggle
breakpoints of different threads, which is needed to safely implement
features like pausing, toggling step-out, toggling step-in per thread,
etc.
Fixes #27131
-------------------------
Metric Decrease:
T3294
-------------------------
- - - - -
ce97fd3e by Rodrigo Mesquita at 2026-04-30T04:54:08-04:00
test: Add test setting another TSO's flags
Introduces a test that runs on two capabilities. The main thread running
on Capability 0 sets the flags on a TSO running on Capability 1.
The TSO from Capability 1 itself checks whether its flags were set and
reports that back.
This validates that the RTS messages for setting TSO flags work, even if
it doesn't test a harsher scenario with race conditions to exercise why
the message passing is necessary for safely setting another TSO's flags.
Part of #27131
- - - - -
a4ff6315 by David Eichmann at 2026-04-30T04:54:51-04:00
Hadrian: withResponseFile outputs response file when verbodity is Verbose
At the Verbose verbosity, shake will display full commandlines. With the
use of response files, the full command is hidden. That makes it hard to run
the command manually. This commit outputs the contents of the response
file so that that full command can be recreated and also hints at the
use of the --keep-response-files hadrian flag.
- - - - -
cd732ee3 by Duncan Coutts at 2026-04-30T04:54:51-04:00
Use response files for hadrian linking with ghc (support long command lines)
In future support for windows dynamic linking, we expect long command
lines for linking dll files with ghc. Experiments with dynamic linking the
ghc-internal library yielded a link command well over 32kb. We did not
encounter this before for static libs, since we already use ar's @file
feature (if available, which it is for the llvm toolchain).
Co-authored-by: David Eichmann <davide(a)well-typed.com>
- - - - -
3d41368f by Andreas Klebinger at 2026-04-30T04:55:32-04:00
Split GHC.Driver.Main.hs up into multiple components.
This commit splits GHC.Driver.Main into four components:
* GHC.Driver.Main.Compile
* GHC.Driver.Main.Hsc
* GHC.Driver.Main.Interactive
* GHC.Driver.Main.Passes
We might improve that separation further in the future but this should
hopefully make it easier to reason about and work with this part of the
code.
- - - - -
2128ba85 by Cheng Shao at 2026-04-30T04:56:14-04:00
compiler: avoid unique OccNames for internal Names in bytecode objects
This patch improves bytecode object serialization logic by avoiding
the construction of unique `OccName`s when serializing/deserializing
internal `Name`s. Closes #27213.
-------------------------
Metric Decrease:
LinkableUsage01
-------------------------
- - - - -
e16854c3 by Vladislav Zavialov at 2026-04-30T04:56:57-04:00
Replace GHC 9.16 references with GHC 10.0
- - - - -
39141343 by Alice Rixte at 2026-05-01T14:09:32+02:00
Add Bounded instances for Double, Float, CDouble and CFloat
- - - - -
5c4c3bf4 by Sylvain Henry at 2026-05-02T03:39:28-04:00
testsuite: fix flaky foundation Divisible / mulIntMayOflo# tests (#27222)
Since the LCG was widened to 64 bits and the seed randomised per CI run
(commit 2d30f7d3400 "Vendor mini-QuickCheck for testsuite"), two latent
bugs in the foundation test surface stochastically:
* The Divisible property `(x `div` y) * y + (x `mod` y) == x` raises
ArithException(Overflow) when (a, b) = (minBound, -1) for fixed-width
signed Integral types. Split testNumber/testDivisible into Bounded and
unbounded variants and skip just that one pair, gated by
`(minBound :: a) < 0` so unsigned types lose no coverage.
* The `mulIntMayOflo#` test compared raw Int# bit-for-bit, but the primop
is only specified to return 0/non-zero -- the exact non-zero indicator
legitimately differs between backends and inlining choices. Add a
dedicated `testPrimopMayOflo` helper that only compares zero / non-zero.
Also fix the long-standing typo "Dividible" -> "Divisible" in identifiers.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
e242ce4f by Sylvain Henry at 2026-05-02T03:39:28-04:00
testsuite: catch and display exceptions in MiniQuickCheck
Exceptions raised while evaluating a property are now caught and reported
as a normal failure (with arguments and seed), instead of aborting the
test.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
3b75cccd by fendor at 2026-05-02T03:40:14-04:00
Fix name of Note [Structure of dep_boot_mods]
- - - - -
9a9ae4df by Duncan Coutts at 2026-05-05T14:44:37-04:00
Use __attribute__((dllimport)) for external RTS symbol declarations
This is needed to be hygenic about DLL symbol imports and exports.
The attribute is ignored on platforms other than Windows.
Use of the attribute however means that external data symbols do not
have a compile-time constant address (they are loaded using an
indirection). This means we have to adjust the rtsSyms initial linker
table so that it is a local constant in a function, rather than a global
constant. We now define it within a function that pre-populates the
symbol table with the RTS symbols.
- - - - -
2ad3e01e by Duncan Coutts at 2026-05-05T14:44:37-04:00
Fix the rts linker declarations for a few data symbols
and ensure that the (windows only) rts_IOManagerIsWin32Native data
symbol is marked as externally visible.
- - - - -
8ff4fdb5 by David Eichmann at 2026-05-05T14:44:37-04:00
Hadrian: Disable runtime pseudo relocations for RTS on windows hosts
- - - - -
96974723 by Teo Camarasu at 2026-05-05T14:45:20-04:00
ghci/TH: refactor to use IORef QState
This is a pure refactor and shouldn't modify semantics at all
- - - - -
eff6bfaf by Teo Camarasu at 2026-05-05T14:45:20-04:00
iserv: recover/getQ/putQ should behave same as internal interpreter
The internal and external interpreter should behave the same when
handling `recover`, the exeception recovery method of Q.
In practice, they diverge. In case of failure, the internal interpreter
only restores error message state to before the computation, wheras the
external interperter restores error message state *and* the state of putQ/getQ.
As far as I can tell this is a simple mistake in the implementation.
Note [TH recover with -fexternal-interpreter] describes the correct
behaviour but the implementation doesn't mirror this.
This change restores the correct behaviour by keeping the effects of
putQ in the erroring computation.
This is a breaking change since it modifies the behaviour of programs
that rely on recover ignoring putQ from failling computations when used
with the external interpreter. Although I highly doubt anyone relies on
this behaviour.
This divergence was first introduced in d00c308633fe7d216d31a1087e00e63532d87d6d.
As far as I can tell this was unintentional and tha commit was trying to solve a different bug.
Resolves #27022
- - - - -
1cb1d672 by Wen Kokke at 2026-05-06T09:53:40-04:00
rts: Add dynamic trace flags API
This commit adds an API to the RTS (exposed via Rts.h) that allows users to dynamically change the trace flags.
Prior to this commit, users were able to stop and start the profiling and heap profiling timers (via startProfTimer/stopProfTimer and startHeapProfTimer/stopHeapProfTimer).
This extends that functionality to also cover the core event types.
The getTraceFlag/setTraceFlag functions read and write the values of the trace flag cache, which is allocated by Trace.c, rather than modifying the members of RtsFlags.TraceFlags.
This is done under the assumption that the members of RtsFlags should not be modified after RTS initialisation.
Consequently, if the user modifies the trace flags using setTraceFlag, the object returned by getTraceFlags (from base) will not reflect these changes.
The trace flags are not protected by locks of any sort.
Hence, these functions are not thread-safe.
However, the trace flags are not modified by the RTS after initialisation, only read, so the race conditions introduced by one user modifying them are most likely benign.
This PR also puts the trace flag cache in a single global struct, as opposed to a collection of global variables, and changes the types of the individual flags from uint8_t to bool, as these have the same size on both Clang and GCC and are a better semantic match.
Prior to the change to uint8_t, they had type int, see 42c47cd6.
Even with its deprecation in C23, I don't think there should be any issue depending on stdbool.h.
The TRACE_X macros are redefined to access the global struct, with values cast to const bool to ensure they are read-only.
- - - - -
9d54dc94 by Wen Kokke at 2026-05-06T09:53:40-04:00
rts: Ensure TRACE_X values are used in place of RtsFlags.TraceFlags.X
- - - - -
418d737b by Wen Kokke at 2026-05-06T09:53:40-04:00
rts: Fix nonmoving-GC tracing
The current nonmoving-GC tracing functions were written in a different
style from the other tracing functions. They were directly implemented
as, e.g., a traceConcMarkEnd function that called postConcMarkEnd.
The other tracing functions are implemented as, e.g., traceThreadLabel_,
a function that posts the thread label event, and traceThreadLabel, a
macro that checks whether TRACE_scheduler is set. This commit fixes that
implementation, and ensures that the nonmoving-GC tracing functions only
emit events if nonmoving-GC tracing is enabled.
- - - - -
99f4afa4 by Wen Kokke at 2026-05-06T09:53:40-04:00
rts: Add SymI_HasProto for get/setTraceFlag
- - - - -
7e9eb8b9 by Wen Kokke at 2026-05-06T09:53:40-04:00
rts: Add SymI_HasProto for start/endEventLogging
- - - - -
3a3045fb by Wen Kokke at 2026-05-06T09:53:41-04:00
rts: Add changelog entry
- - - - -
a3b339a4 by Teo Camarasu at 2026-05-06T09:54:25-04:00
interface-stability/base: don't distinguish ws-32
The interface of base is identical when the Word size is 32bits.
Therefore, there is no need to have another file for this case.
So, we delete it.
Step towards: #26752
- - - - -
eb922183 by Duncan Coutts at 2026-05-07T14:28:50+01:00
Add a rts posix FdWakup utility module
This will be used to implement wakeupIOManager for in-RTS I/O managers.
It provides a notification/wakeup mechanism using FDs, suitable for
situations when a thread is blocked on a set of fds anyway. It uses the
classic self-pipe trick, or equivalently eventfd on supported platforms.
This will initially be used to implement prompt interrupt or shutdown of
the posix ticker thread.
- - - - -
01b0e233 by Duncan Coutts at 2026-05-07T14:28:50+01:00
Add prompt shutdown to the pthread ticker implementation.
The Linux timerfd ticker monitors a pipe which is used by exitTicker to
ensure a prompt wakeup and shutdown. The pthread ticker lacked this and
so would only exit at the next ticker wakeup (10ms by default).
This patch adds the same mechanism to the pthread ticker.
This changes the pthread ticker from waiting by using nanosleep() to
waiting using either ppoll() or select(), so that it can wait on both
a time and a file descriptor. On Linux at least, a test program to
compare the timing jitter of these APIs shows that using nanpsleep,
ppoll or select makes no statistical difference to the maximum or
average jitter.
This is a step towards unifying the posix ticker implementations, so
that we can have just one portable one (albeit with some limited cpp).
It is also a step towards using the ticker as part of a more general
implementation of wakeUpRts, since this will require a method to wake
the rts from a signal handler context (ctl-c handler).
- - - - -
bc41d646 by Duncan Coutts at 2026-05-07T14:28:50+01:00
Update ticker header commentary
It was antique and didn't apply even to the previous implementation, and
certainly not to the updated one.
- - - - -
4ed9a386 by Duncan Coutts at 2026-05-07T14:28:50+01:00
Remove the timerfd-based ticker implementation
There does not appear to be any remaining advantage on Linux to using
the timerfd ticker implementation over the portable one (using ppoll on
Linux for precise timing).
The eventfd implementation was originally added at a time when Linux was
still using a signal based implementation. So it made sense at the time.
See (closed) issue #10840.
- - - - -
97504fa6 by Duncan Coutts at 2026-05-07T14:28:50+01:00
Consolidate to a single posix ticker implementation
Previously we had four implementations, two using signals and two using
threads. Having just one should make behaviour more consistent between
platforms, and should make maintenance easier.
- - - - -
1e60023b by Facundo Domínguez at 2026-05-07T18:01:16-04:00
Generalize so_inline to specify which bindings should be preserved
This commit generalizes the so_inline option of the simple optimizer
so we can indicate with a predicate the specific bindings that should
be kept.
This feature is important for the LiquidHaskell plugin, which relies on the
simple optimizer to make core programs easier to read, but needs to preserve
bindings that are relevant for verification.
See https://gitlab.haskell.org/ghc/ghc/-/issues/24386 for the full discussion.
- - - - -
44cf9cd7 by Wolfgang Jeltsch at 2026-05-12T09:48:18-04:00
Move the `Text.Read` implementation into `base`
- - - - -
4ac3f7d6 by Vladislav Zavialov at 2026-05-12T09:49:03-04:00
EPA: Use AnnParen for tuples and sums
Summary of changes
* Do not use AnnParen in XListTy, replace it with EpToken "[" and "]"
* Specialise AnnParen to tuple/sums by dropping the AnnParensSquare
and keeping only AnnParens and AnnParensHash
* Use AnnParen in XExplicitTuple
* Use AnnParen in XExplicitTupleTy
* Use AnnParen in XTuplePat
* Use AnnParen in XExplicitSum (via AnnExplicitSum)
* Use AnnParen in XSumPat (via EpAnnSumPat)
This is a refactoring with no user-facing changes.
- - - - -
1bdcddec by Duncan Coutts at 2026-05-12T09:49:48-04:00
Add minimal dlltool support to ghc-toolchain
The dlltool is a tool that can create dll import libraries from .def
files. These .def files list the exported symbols of dlls. Its somewhat
like gnu linker scripts, but more limited.
We will need dlltool to build the rts and ghc-internal libraries as DLLs
on Windows. The rts and ghc-internal libraries have a recursive
dependency on each other. Import libraries can be used to resolve
recursive dependencies between dlls. We will use an import library for
the rts when linking the ghc-internal library.
- - - - -
f7fc3770 by Duncan Coutts at 2026-05-12T09:49:48-04:00
Add minimal dlltool support into ./configure
Find dlltool, and hopefully support finding it within the bundled llvm
toolchain on windows.
- - - - -
e4e22bfb by Duncan Coutts at 2026-05-12T09:49:48-04:00
Update the default host and target files for dlltool support
- - - - -
5666c8f9 by Duncan Coutts at 2026-05-12T09:49:48-04:00
Add dlltool as a hadrian builder
Optional except on windows.
- - - - -
5e14fe3f by Duncan Coutts at 2026-05-12T09:49:48-04:00
Update and generate libHSghc-internal.def from .def.in file
The only symbol that the rts imports from the ghc-internal package now
is init_ghc_hs_iface. So the rts only needs an import lib that defines
that one symbol.
Also, remove the libHSghc-prim.def because it is redundant. The rts no
longer imports anything from ghc-prim.
Keep libHSffi.def for now. We may yet need it once it is clear how
libffi is going to be built/used for ghc.
- - - - -
3d91e4a6 by Duncan Coutts at 2026-05-12T09:49:48-04:00
Add rule to build libHSghc-internal.dll.a and link into the rts
On windows only, with dynamic linking.
This is needed because on windows, all symbols in dlls must be resolved.
No dangling symbols allowed. References to external symbols must be
explicit. We resolve this with an import library. We create an import
library for ghc-internal, a .dll.a file. This is a static archive
containing .o files that define the symbols we need, and crucially have
".idata" sections that specifies the symbols the dll imports and from
where.
Note that we do not install this libHSghc-internal.dll.a, and it does
not need to list all the symbols exported by that package. We create a
special purpose import lib and only use it when linking the rts dll, so
it only has to list the symbols that the rts uses from ghc-internal
(which is exactly one symbol: init_ghc_hs_iface).
- - - - -
c8dae539 by Alice Rixte at 2026-05-12T09:50:52-04:00
Script for downloading and copying `base-exports` file
- - - - -
5fab2238 by Wolfgang Jeltsch at 2026-05-12T21:24:27+03:00
Introduce a cache of home module name providers
This contribution introduces to the module graph a cache that maps home
module names to sets of units providing them and changes the finder to
use that cache. This is a performance optimization, especially for
multi-home-unit builds.
The particular changes are as follows:
* In `GHC.Unit.Module.Graph`, `ModuleGraph` is extended with a new
field `mg_home_module_name_providers_map`, exposed as
`mgHomeModuleNameProvidersMap`. This is a cache that assigns to each
home module name the set of IDs of home units that define it.
Operations that construct module graphs are updated such that this
cache stays synchronized.
* In `GHC.Unit.Finder`, `findImportedModule` is changed to pull
`mgHomeModuleNameProvidersMap` from `hsc_mod_graph` and pass it to
`findImportedModuleNoHsc`, which now does not search home units in
arbitrary order but prioritizes those units that the cache mentions
as potential providers of the requested module.
In addition, this contribution adds variants of the two multi-component
compiler performance tests that use 100 units instead of 20, because
with just 20 units the benefits from caching of home module name
providers are still negligible.
The following table shows the total time needed for running both
multi-component tests before and after this contribution and with
different numbers of units:
| # of units | Before | After |
|-----------:|-------:|------:|
| 20 | 0:12 | 0:12 |
| 100 | 0:47 | 0:42 |
| 200 | 3:05 | 2:08 |
Note that there seems to be a general overhead of 12 seconds that is not
attributable to the actual tests, so that the real running times should
be 12 seconds smaller than shown above.
Resolves #27055.
Metric Decrease:
MultiComponentModules
MultiComponentModulesRecomp
Co-authored-by: Matthew Pickering <matthewtpickering(a)gmail.com>
Co-authored-by: Fendor <fendor(a)posteo.de>
- - - - -
38b76b2f by Cheng Shao at 2026-05-13T17:48:48-04:00
testsuite: mark T22159 as fragile
This patch marks T22159 as fragile on Windows for issue described in #27248.
Before we get to the bottom of those failures, this unblocks newer
Windows runners.
- - - - -
50188615 by Ian Duncan at 2026-05-14T13:45:07+02:00
AArch64: use ASR not LSR for MO_U_Shr at W8/W16
The unsigned right shift (MO_U_Shr) for sub-word widths (W8, W16)
with a variable shift amount was emitting ASR (arithmetic/signed shift
right) after zero-extending with UXTB/UXTH. This should be LSR
(logical/unsigned shift right). After zero-extension the upper bits
happen to be 0 so ASR produces the same result, but it is semantically
wrong and would break if the zero-extension were ever optimized away.
Includes assembly output test (grep for lsr) and runtime test
verifying unsigned right shift of Word8 and Word16 values.
- - - - -
28666fbf by Vladislav Zavialov at 2026-05-19T12:44:05-04:00
Add type families: Tuple, Constraints, Tuple#, Sum# (#27179)
These type families map tuples of types to the corresponding Tuple<N>,
Tuple<N>#, CTuple<N>, and Sum<N># types. Some examples at N=2:
Tuple (Int, Bool) = Tuple2 Int Bool
Constraints (Show a, Eq a) = CTuple2 (Show a) (Eq a)
Tuple# (Int#, Float#) = Tuple2# Int# Float#
Sum# (Int#, Float#) = Sum2# Int# Float#
See GHC Proposal #145 "Non-punning list and tuple syntax".
To make the Sum# instance at N=64 possible, this patch also introduces
the Sum64# constructor declaration and bumps mAX_SUM_SIZE from 63 to 64.
Metric Increase:
ghc_experimental_dir
- - - - -
41c2448b by Wen Kokke at 2026-05-19T12:44:53-04:00
rts: Add IPE event class for -l
This commit adds a new IPE event class to the -l RTS flag.
Previously, IPE events were enabled unconditionally.
However, the IPE events can easily grow to hundreds or thousands of megabytes.
With the new event class you can pass, e.g., -l-I to disable IPE events.
- - - - -
62536551 by Wen Kokke at 2026-05-19T12:44:53-04:00
ghc-internal: Add TraceFlags.traceIPE
- - - - -
e45312d1 by Wen Kokke at 2026-05-19T12:44:53-04:00
testsuite: Add test for TraceFlags.traceIpe
- - - - -
4768d9aa by Wen Kokke at 2026-05-19T12:44:53-04:00
ghc-internal: Add DebugFlags.ipe
- - - - -
bc1b5c69 by Wen Kokke at 2026-05-19T12:44:53-04:00
testsuite: Add test for DebugFlags.ipe
- - - - -
0da1543f by Duncan Coutts at 2026-05-19T12:45:37-04:00
Document removal of the signal-based interval timer
Update mentions within the RTS section of the users guide.
Add a changelog entry.
- - - - -
b2911514 by Duncan Coutts at 2026-05-19T12:45:37-04:00
Fix section for an recent changelog entry
- - - - -
d6d76a7a by David Eichmann at 2026-05-19T12:46:19-04:00
ghc-toolchain: implement llvm program versioning logic
- - - - -
2dd36fa3 by Wolfgang Jeltsch at 2026-05-20T04:49:52-04:00
Turn `Trustworthy` into `Safe` in `base` where possible
- - - - -
f4399dd1 by Wolfgang Jeltsch at 2026-05-20T04:50:37-04:00
Make the current `base` buildable with GHC 10.0
- - - - -
1a7de232 by Duncan Coutts at 2026-05-20T12:26:25-04:00
Hadrian: remove legacy rts .so symlinks
For compatibility with the old makefile based build system, hadrian had
rules to generate symlinks from unversioned to versioned names for the
rts .so/.dynlib file, like libHSrts-ghcx.y.so -> libHSrts-1.0.3-ghcx.y.so
We no longer need these symlinks since the makefile build system has
been retired some time ago. The need for these symlinks is awkward on
windows where we cannot (in practice) create symlinks. So rather than
make them conditional (non-windows), just remove them entirely.
- - - - -
286f1adf by fendor at 2026-05-20T12:27:09-04:00
Fix regression T27202: `:load` and `:add` work in GHCi
To fix the regression there are conceptually two major things that we
fix:
* We don't remove the `importDirs` from `interactive-session`
* When `:add`ing a module, we don't try to find them via PackageImports
* The PackageImport is wrong as we can't know the package-name at
this stage in ghc/UI.hs
What does it mean to not remove the `importDirs` from
`interactive-session`?
It means that, given some initial `DynFlags`, we will use those
`importDirs` in `interactive-session`.
The initial `DynFlags`, however, depend on how you initialise the GHC
session.
For a simple session, initialised by
ghc -isrc -this-unit-id main
It is simple, just use the `DynFlags` given on the cli.
Thus, `main` and `interactive-session` will have the same `DynFlags`,
except for the `homeUnitId` and `interactive-session` depends on `main`
by construction of the GHCi session.
What about a multiple home unit session, though?
ghc -unit @unit1 -unit @unit2
What are the `DynFlags` in this cli invocation? It shouldn't be either
`@unti1` nor `@unit2`, as the order shouldn't matter or any other
implicit condition.
For consistency, we decide that the initial `DynFlags` are the top
`DynFlags` on the cli, ignoring `-unit` flags.
Thus, in this example, there are no `importsDirs` regardless of what we
might find in `@unit1` and `@unit2`.
But in this invocation:
ghc -isrc -unit @unit1 -unit @unit2
The `interactive-session` will have the `importsDirs` `src`.
Note, `-isrc` will be inherited in `@unit1` and `@unit2`, so you need to
explicitly use `-i` to clear the `importsDirs`, in order to avoid
accidentally adding `src` as an import directory to all other home
units.
This fix has been made possible by the improvements introduced in
!15888, which avoids ambiguity when a home unit shares the `importsDirs`
with the `interactive-session`, on top of being much faster for multiple
home units.
Adds regression tests for T27202 for `:load`ing and `:add`ing modules
that are located in import directories.
- - - - -
728662de by fendor at 2026-05-20T12:27:09-04:00
Use home unit package db stacks in GHCi prompt and session unit
In order to import modules from home unit dependencies (e.g., `Data.Map`),
the ghci prompt unit needs to populate its `UnitState`.
This is tricky to handle correctly, which `PackageDBFlag`s should we use
to populate the `UnitState`?
We decide, the most intuitive solution for users is to depend on all
`PackageDBFlag`s, so that any dependency can be imported in GHCi.
This assumes consistency in the `PackageDBFlag`s, so no two home units
specify `PackageDBFlag`s that are inconsistent with each other.
We could simply concat all the `PackageDBFlag`s of the existing home
units, but later `PackageDBFlag`s shadow earlier ones, leading to the
last processed home units' `PackageDBFlag`s to shadow the earlier ones.
This is hard to fix, we need to give users the capability to provide ghc
options for the ghci prompt home unit.
However, as this is considerably more work, we decided on an
approximation that should work out most of the time.
Package Db stacks in cabal and stack follow a certain structure:
-no-user-package-db > -package-db $cabal-store > -package-db $local-db
The first two arguments are always the same, namely the
`-no-user-package-db` and `-package-db`.
We compute the longest common prefix over all home units, and use that
as the start of the package db stack. Then, over the rest of the
`PackageDBFlag`s, we simply take the union and append them to our
initial stack.
We assume, that the rest of package dbs only defines very few, "local"
units that are usually not shadowing each other.
This allows us to get a relatively consistent package database stack for
the ghci prompt home unit.
Similar reasoning applies to the session unit in order to add modules to
the session and have dependencies available in the module.
We do something similar for `-package` flags, to make sure only the
correct units are actually visible in the ghci session.
This time, we simply take the union of all `PackageFlag`s, allowing us
to import modules from the home unit dependencies.
In the future, it would be beneficial to allow the user to provide the
exact ghc options to control the visibilities. For now, this will have
to do.
- - - - -
740d89a0 by Simon Peyton Jones at 2026-05-20T17:20:44-04:00
Do not use mkCast during typechecking
This commit fixes #27219. The problem was that the typechecker was using
`mkCast`, whose assertion checks legitimately fail when applied to types
that contain unification variables.
- - - - -
a50fdb06 by Simon Peyton Jones at 2026-05-20T17:20:45-04:00
Major refactor of the Simplifier
The main payload of this patch is to refactor the Simplifer to avoid
repeated simplification when using Plan (AFTER) for rule rewrites.
The need for this was shown up by #26989.
See Note [Avoid repeated simplification] in GHC.Core.Opt.Simplify.Iteration.
Related refactoring:
* Refactor the two fields `sc_dup` and `sc_env` in `ApplyToVal` into one, `sc_env`.
Reason: the envt is irrelevant in the "simplified" case, so the data type describes
the possiblitiies much more accurately now.
* Some refactoring in `knownCon` to split off `wrapDataConFloats`.
* Refactor `lookupRule` and its auxiliary functions to return `RuleMatch`,
a new data type. See Note [data RuleMatch] in GHC.Core. Ditto for BuiltinRule.
This RuleMatch returns fragments of the target in rm_args and rm_floats,
leaving `rm_rhs` to be the stuff from the RULE itself.
Doing this has routine consequences in GHC.Core.Opt.ConstantFold. Many changes
there but all routine.
* When doing occurrence analysis on RULEs, make the occ-info on the rule
binders relate just to the RHS, not the LHS. See (OUR1) in
Note Note [OccInfo in unfoldings and rules]
This means that Lint must not complain about the fact that the patterns
in the RULE mentions binders that are marked dead.
See Note [Dead occurrences] in GHC.Core.Lint.
I changed the Core pretty-printer so that it didn't suppress dead binders,
else I can't see those binders in RULEs. That led to quite a lot of testsuite wibbles.
* Refactor FloatBinds, so that it is used both by
`exprIsConApp_mabye` and by `lookupRule`
* Move the definition of FloatBinds out of GHc.Core.Make, into GHC.Core.
* Add FloatTick as an extra constructor.
* Refactor `lookupRule` to use `FloatBinds` instead of `BindWrapper`.
This refactor just shares more code.
(Rename GHC.Core.Opt.FloatOut.FloatBinds to FloatLets, to avoid gratuitious
name clash with GHC.Core.FloatBinds.)
Corecion optimisation
* In simpleOpt, when composing coercions, call new function `optTransCo`.
This is much lighter weight than full blown coercion optimisation.
* Make `GHC.Core.Opt.Arity.pushCoValArg` and `pushCoTyArg` return the
coercionLKind of the coercion. This saves recomputing that coercionLKind
at the key call sites in GHC.Core.Opt.Simplify.Iteration.pushCast.
* Rename `addCoerce` in GHC.Core.Simplify.Iteration to become `pushCast`.
* In the `ApplyToVal` case of `pushCast` we had a very unsavoury call to `simplArg`.
I eliminated it by adding a field `sc_cast` to `ApplyToVal` that records any
pending casts. Much nicer now. See Note [The sc_cast field of ApplyToVal].
* Don't optimise coercions if the type-substitution is empty.
See Note [Optimising coercions] in GHC.Core.Opt.Simplify.Iteration.
The fix for #26838 is dramatic. For the test in perf/compiler/T26839 we have
Compiler allocs: Before: 7,363M
After: 688M
Compile time goes down generally. Here are compiler-alloc changes
over 0.5%:
CoOpt_Read(normal) 729,184,920 -0.7%
CoOpt_Singletons(normal) 666,916,960 -4.6% GOOD
LargeRecord(normal) 1,227,056,876 +1.1%
T12227(normal) 256,827,604 -4.6% GOOD
T12425(optasm) 76,879,410 -0.8%
T12545(normal) 787,826,918 -10.8% GOOD
T12707(normal) 775,186,464 -0.9%
T13253(normal) 318,599,596 -0.8%
T14766(normal) 685,857,320 -1.0%
T15304(normal) 1,123,333,422 -2.2%
T15630(normal) 123,142,330 -2.6%
T15630a(normal) 123,092,100 -2.6%
T15703(normal) 299,751,682 -2.9% GOOD
T17516(normal) 964,072,280 +1.0%
T18223(normal) 367,016,820 -6.2% GOOD
T18730(optasm) 130,643,770 -3.3% GOOD
T20261(normal) 535,608,584 -0.7%
T21839c(normal) 340,340,436 -0.9%
T24984(normal) 85,568,392 -1.9%
T3064(normal) 174,631,992 -1.2%
T3294(normal) 1,215,886,432 -0.7%
T5030(normal) 141,449,704 -17.2% GOOD
T5321Fun(normal) 258,484,744 -1.9%
T8095(normal) 770,532,232 -2.7%
T9630(normal) 858,423,408 -14.5% GOOD
T9872c(normal) 1,591,709,448 +0.7%
info_table_map_perf(normal) 19,700,614,458 -1.3%
geo. mean -0.7%
minimum -17.2%
maximum +1.1%
However, strangely there seems to be a 5.0% increase in CoOpt_Read in
the x86_64-linux-fedora43-validate+debug_info+ubsan job, although
there generally a /decrease/ in this test in other builds. The baseline
value looks strange. Anyway I'll just accept it.
Metric Decrease:
CoOpt_Singletons
T12227
T12545
T12707
T15703
T18223
T18730
T21839c
T5030
T9630
Metric Increase:
CoOpt_Read
- - - - -
834623d4 by Mrjtjmn at 2026-05-20T17:21:41-04:00
users-guide: Fix weird notation in "Summary of stolen syntax"
- - - - -
6f9d7c71 by Markus Läll at 2026-05-21T15:25:34-04:00
Use "grimily" instead of "grimly"
Fixes https://gitlab.haskell.org/ghc/ghc/-/issues/27221
- - - - -
50e999ca by fendor at 2026-05-21T15:26:18-04:00
Speed up 'closure' computation in `ghc-pkg`
Cache the set of already seen `UnitId`s and use `Set` operations to
speed up 'closure' computation.
Further simplify the implementation of 'closure' to account for the
actual usage.
As a consequence, we rename 'closure' to 'brokenPackages' to reflect its
purpose better after the simplification.
- - - - -
7ecc6184 by sheaf at 2026-05-21T15:27:10-04:00
TcMPluginHandling: be more lenient when no plugins
This change ensures that, if a function such as 'typecheckModule' was
invoked with 'NoTcMPlugins', GHC doesn't spuriously complain about TcM
plugins having already been stopped, as there were none to start with.
- - - - -
72c8de5c by Simon Jakobi at 2026-05-23T18:41:42-04:00
Implement List.elem via foldr
...in order to allow specialization to Eq instances.
The implementation of notElem is updated for consistency.`
Corresponding CLC proposal:
https://github.com/haskell/core-libraries-committee/issues/412
Addresses #27096.
- - - - -
3268c610 by Alan Zimmerman at 2026-05-23T18:42:30-04:00
EPA: Fix span for qualified multiline string
Fix the span for a qualified multiline string like
Text."""
I'm a multiline
Text value
!
"""
to extend to the end of the entire string, not just the first line.
Closes #27274
- - - - -
1f096790 by Alan Zimmerman at 2026-05-23T18:43:20-04:00
EPA: Fix exact printing namespace-specified wildcards
Ensures correct printing of imports of the form
import Data.Bool (data True(data ..))
import Data.Bool (data True(type ..))
Closes #27291
- - - - -
56ada7c0 by Mrjtjmn at 2026-05-23T18:44:19-04:00
Fix ambiguous syntax of BangPatterns in users guide
Update documentation for the BangPatterns extension to specify
how surrounding whitespace affects interpretation of `!`.
* Only when there is whitespace before `!` and no whitespace after,
it is recognized as a BangPattern.
* Other cases `⟨varid⟩!⟨varid⟩`, `⟨varid⟩ ! ⟨varid⟩`, `⟨varid⟩! ⟨varid⟩`
are treated as infix operators.
- - - - -
579aa0b7 by Simon Jakobi at 2026-05-25T16:31:26-04:00
Ensure that SetOps.{minusList,unionListsOrd} can be specialized
...by marking them INLINABLE. Haddock allocates 0.1–0.3% less as a
result.
This also removes some redundant constraints on unionListsOrd.
- - - - -
cccf45da by Cheng Shao at 2026-05-25T16:32:13-04:00
wasm: ensure post-linker output is synchronous ESM
This patch fixes wasm backend's post-linker output script to ensure
it's synchronous ESM and doesn't use top-level await, which doesn't
work in ServiceWorkers. Fixes #27257.
- - - - -
8db331a3 by Zubin Duggal at 2026-05-26T04:54:03-04:00
Update to semaphore-compat 2.0.0 using v2 of the protocol
On Linux and other POSIX platforms, GHC's -jsem jobserver client now
speaks v2 of the semaphore-compat protocol, which uses Unix domain
sockets in place of POSIX named semaphores. This avoids the libc-ABI
issues that affected the old implementation. Windows is unaffected
and continues to use the v1 protocol (Win32 named semaphores); its
reported protocol version remains v1.
When GHC receives a -jsem name whose protocol version it does not
support, it emits a -Wsemaphore-version-mismatch warning and falls
back to -j<N> rather than crashing. ghc --info exposes the supported
version in a new "Semaphore version" entry so cabal-install can detect
a mismatch before invoking GHC.
Users on a cabal-install that predates the v2 update will continue to
build successfully on Linux/POSIX, but will lose the cross-process
-jsem coordination and fall back to -j<N> per GHC invocation. Users
must upgrade to a cabal-install that supports protocol v2 to recover
full parallelism.
Also fix a leak in cleanupSem (#27253): cleanupSem used to snapshot
heldTokens and release them before killing the loop, while the loop's
in-flight acquire/release children could still be mutating it.
Cleanup now runs inside the loop's own exit handler, after draining
the active child via a new activeChild TVar, so the snapshot has no
concurrent mutator.
See also:
- GHC proposal amendment: https://github.com/ghc-proposals/ghc-proposals/pull/673
- cabal-install patch: https://github.com/haskell/cabal/pull/11628
- semaphore-compat MR: https://gitlab.haskell.org/ghc/semaphore-compat/-/merge_requests/8
Bump semaphore-compat submodule to 2.0.0
Fixes #25087 and #27253
- - - - -
17be4f1f by Alan Zimmerman at 2026-05-26T04:54:52-04:00
EPA: Record semicolons in HsModifier
Ensure the semi colons are captured in the ParsedSource for code like
%True;; %False;
instance C D
It makes HsModifier (and hence HsModifierOf) LocatedA, so the semi
colons can be recorded as [TrailingAnn]
Also rename pprHsModifiers to pprLHsModifiers to match.
Closes #27294
- - - - -
8f991755 by fendor at 2026-05-26T11:02:52-04:00
Revert prog003 acceptance
We thought the commit 286f1adff3e78d775ff325caff71d0cee25d710b fixed the
test, but due to changes to ghci, modules loaded during the GHCi
session, the test was actually no longer testing what it set out to do,
"fixing" the broken test.
As modules are added to the `interactive-session` home unit, the object code needs
to be compiled with `-this-unit-id interactive-session`, otherwise the
object code won't be used.
Once this has been fixed in the test, the test fails as expected again.
- - - - -
277a3687 by mangoiv at 2026-05-26T11:03:40-04:00
libraries/process: bump submodule to v1.6.29.0
This submodule bump resolves a segfault on macos 15.
Fixes #27144
- - - - -
6779bb0c by mangoiv at 2026-05-26T11:03:40-04:00
libraries/unix: in submodule, don't pick branch 2.7
The 2.7 branch is outdated and the module has been advanced far beyond
it anyway, so remove that line.
- - - - -
4a645683 by Simon Peyton Jones at 2026-05-27T21:41:59-04:00
Trim the continuation in mkDupableContWithDmds
When there are no remaining argument demands, it means the application
is bottoming. In this case, we can trim the continuation to avoid the
panic that was observed in #27261.
See Note [Trimming the continuation for bottoming functions] in
GHC.Core.Opt.Simplify.Iteration.
- - - - -
8ab506ff by Cheng Shao at 2026-05-27T21:42:47-04:00
ghci: fix module name string lifetime in hs_hpc_module invocation
This patch makes hpcAddModule pass a properly malloced module name
string to hs_hpc_module, instead of using useAsCString which causes
use-after-free of module name string. Fixes #27297.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
b0233814 by sheaf at 2026-05-27T21:43:31-04:00
Relax acceptance threshold for T10421
As seen in #27289, the 1% acceptance threshold for this text was
overly narrow, resulting in spurious test failures. This commit widens
the acceptance threshold to 2%. Fixes #27289.
- - - - -
63ce5770 by Luite Stegeman at 2026-05-28T12:23:35-04:00
Fixes for black holes
- suspend duplicate work for eager black holes
- detect eager black holes in checkBlockingQueues
- don't overwrite existing black holes even if they're not
in an eager blackhole frame
- don't deadlock on self when thunk is already blackholed
Fixes #26936
- - - - -
037a80dc by Tom McLaughlin at 2026-05-28T12:24:36-04:00
Event/Windows.hsc: rethrow exceptions in overlapped IO
This prevents the WinIO manager from swallowing exceptions in overlapped IO. It
was added to make WinIO support possible in the `network` library. See
https://gitlab.haskell.org/ghc/ghc/-/issues/27283.
We also bump __IO_MANAGER_WINIO__ to 2 so libraries can gate on this using CPP.
- - - - -
2d53bcdb by Wolfgang Jeltsch at 2026-05-28T12:25:21-04:00
Allow `downsweep` to use nodes of an existing module graph
To this end, `downsweep` has not been able to use the nodes of a module
graph obtained from a previous downsweeping round. In some GHC API
applications, downsweeping is performed somewhat incrementally and
therefore could profit from reusing such existing results. This
contribution makes this possible.
Resolves #27054.
Co-authored-by: Matthew Pickering <matthewtpickering(a)gmail.com>
- - - - -
f4fbb583 by Simon Jakobi at 2026-05-28T12:26:04-04:00
Add regression test for T11226
Closes #11226.
- - - - -
ed29a5e6 by Sven Tennie at 2026-05-28T17:30:36-04:00
Add optional config setting for LibDir (#19174)
Previously, the `libDir` was derived from `topDir`. This won't work for
inplace stage2 cross-compilers where binaries and libraries are in
different stage dirs (`_build/stage1/` for executables and
`_build/stage2` for libraries).
`LibDir` is set in the inplace `settings` files. For bindists, we
generate a new `settings` file with no `LibDir` entry. GHC then defaults
to use `topDir` as `libDir` again. This keeps the bindist relocatable.
If `LibDir` is a relative path, it is interpreted relatively to
`topDir`.
The global package db is part of the `lib/` folder. If we want to point
for inplace cross-compilers to the succeeding stage's folder, this is
done by setting `LibDir`. Thus, the global package db must be found
relative to `libDir`` (which may default to `topDir` or be set by
`LibDir`).
The complexity of settings becomes scary. So, add a test to ensure
`LibDir` works as expected.
- - - - -
8339cf8f by Sven Tennie at 2026-05-28T17:30:36-04:00
Add Haddock to FileSettings
Helping to understand the fields' meanings without deeper analyses.
- - - - -
4ce251e4 by Sylvain Henry at 2026-05-28T17:31:39-04:00
foundation test: skip signed minBound `quot` (-1) (#27222)
`minBound `quot` (-1)` for fixed-width signed integers is platform
dependent: the mathematical result -minBound is not representable in
the type. On x86, IDIV traps; LLVM's sdiv is undefined behaviour in
this case; on AArch64/RISC-V, SDIV wraps to minBound.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
b8ba7e61 by Simon Jakobi at 2026-05-28T17:32:23-04:00
Prevent dictionary-passing in checkTyEqRhs
...by pre-specializing it to TcM.
Previously, wherever checkTyEqRhs was used in other modules, the
Core showed dictionary passing ($fMonadIOEnv). The added SPECIALIZE
pragma prevents this.
- - - - -
d603477f by David Eichmann at 2026-05-29T13:17:12-04:00
Hadrian: create a ghc-internal .def file per ghc-internal dll
The .def file generated from rts/win32/libHSghc-internal.def.in contains
the name of the ghc-internal dll. The correct dll name differs based
on if the dll is inplace/final and if using the Dynamic way. Previously,
this was not accounted for and inconsistent dlls names where used. That
led to failure when loading dlls at runtime in experiments with windows
dynamic linking.
- - - - -
1fc21753 by Sylvain Henry at 2026-05-29T13:18:14-04:00
ghc-bignum: copy backend interface haddocks to Native backend (#27305)
The haddock comments documenting the BigNat backend interface (function
contracts, expected MutableWordArray# sizes, return-value semantics, etc.)
were attached to the FFI backend module. Copy them to the Native backend
so they remain in tree once the FFI backend is removed.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
717059df by Sylvain Henry at 2026-05-29T13:18:14-04:00
ghc-bignum: remove FFI backend (#27305)
The FFI backend of ghc-bignum (now part of ghc-internal) had no known
users and is easy to recreate by relinking ghc-internal with a custom
backend. Remove the backend module, the bignum-ffi cabal flag, and the
ffi option from Hadrian's --bignum selector. The backend interface
documentation now lives in the Native backend module.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
4bb3b1d8 by Sylvain Henry at 2026-05-29T13:18:14-04:00
ghc-bignum: remove Check backend (#27305)
The Check backend of ghc-bignum (now part of ghc-internal) compared the
selected backend's output against the Native backend for validation.
It had no known users. Remove the backend module, the bignum-check
cabal flag, the bignumCheck Hadrian flavour field, and the check-
prefix in Hadrian's --bignum selector.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply(a)anthropic.com>
- - - - -
6b3044a0 by David Eichmann at 2026-05-30T11:58:48-04:00
Add code comments to allocator code
- - - - -
f4e04210 by Matthew Pickering at 2026-05-30T11:59:34-04:00
hadrian: Refactor system-cxx-std-lib rules
I noticed a few things wrong with the hadrian rules for
`system-cxx-std-lib` rules.
* For `text` there is an ad-hoc check to depend on `system-cxx-std-lib`
outside of `configurePackage`.
* The `system-cxx-std-lib` dependency is not read from cabal files.
* Recache is not called on the packge database after the `.conf` file is
generated, a more natural place for this rule is `registerRules`.
Treating this uniformly like other packages is complicated by it not
having any source code or a cabal file. However we can do a bit better
by reporting the dependency firstly in `PackageData` and then needing
the `.conf` file in the same place as every other package in
`configurePackage`.
This commit increases the `shakeVersion`, to provide backwards
compatibility to previous builds with different PackageData.
Fixes #25303
Co-authored-by: Sven Tennie <sven.tennie(a)gmail.com>
- - - - -
9a2b87c0 by Apoorv Ingle at 2026-06-01T10:36:53-05:00
move SectionL and SectionR into tcExpand
Work on #27156
- - - - -
05ff067d by Apoorv Ingle at 2026-06-01T10:36:53-05:00
move Record dot syntax expansion from renamer to Expand
- - - - -
98a6f8db by Apoorv Ingle at 2026-06-01T10:36:54-05:00
tcExpr to do expansion first, then type checking
- - - - -
684d3b06 by Apoorv Ingle at 2026-06-01T10:36:54-05:00
- Add RebindableSyntaxTable to store function/operator names while renaming in the XBlah fields
- Expand the following expressins right before typechecking instead of in the renamer
* OverloadedLabel
* RecordDotSyntax: HsGetField and HsProjection
* ExplicitList
* RecordUpd
* HsIf
- - - - -
de27a240 by Apoorv Ingle at 2026-06-01T10:36:54-05:00
HsQualLit via Expand
- - - - -
6d670bdb by Apoorv Ingle at 2026-06-01T10:36:55-05:00
split tcExpand into two functions. Call Expansion in HsToCore.Quote
- - - - -
c77df502 by Apoorv Ingle at 2026-06-01T10:36:55-05:00
expand the bracket expression before puting it in typed bracket
- - - - -
5e1e8083 by Apoorv Ingle at 2026-06-01T10:36:55-05:00
fix testcases
- - - - -
53a376ed by Apoorv Ingle at 2026-06-01T10:36:55-05:00
remove expand no tcm
- - - - -
7465e109 by Apoorv Ingle at 2026-06-01T10:36:56-05:00
repE
- - - - -
671 changed files:
- .gitlab/generate-ci/gen_ci.hs
- .gitlab/jobs.yaml
- .gitlab/merge_request_templates/Default.md
- .gitmodules
- + changelog.d/T19174.md
- + changelog.d/T26979
- + changelog.d/T27022
- + changelog.d/T27131
- + changelog.d/T27202
- + changelog.d/T27261
- + changelog.d/binary-array-no-list
- + changelog.d/bump-process
- + changelog.d/bytecode-interpreter-hpc-support
- + changelog.d/cmm-import-syntax-changes
- + changelog.d/dynamic-trace-flags
- + changelog.d/elem-via-foldr-27096
- + changelog.d/fix-blackhole-handling
- + changelog.d/fix-finalizers-27072
- + changelog.d/ghc-api-epa-parens
- + changelog.d/ghc-api-holes-ast-27111
- + changelog.d/ghc-api-namespace-specifier-26678
- + changelog.d/ghc-pkg-faster-closure
- + changelog.d/hadrian-response-files.md
- + changelog.d/hadrian-system-cxx-std-lib-25303
- + changelog.d/ipe-event-class
- + changelog.d/jobserver-leak-fix
- + changelog.d/lib-add-tuple-tyfam-27179
- + changelog.d/libdir-setting
- + changelog.d/llvm-22
- + changelog.d/module-graph-reuse-in-downsweep
- + changelog.d/more-efficient-home-unit-imports-finding
- + changelog.d/no-more-timer-signal
- + changelog.d/remove-bignum-check-backend
- + changelog.d/remove-bignum-ffi-backend
- + changelog.d/rts_symlinks.md
- + changelog.d/semaphore-v2
- + changelog.d/simd_constant_folding
- + changelog.d/so_inline_is_a_predicate
- + changelog.d/tcplugin_init.md
- + changelog.d/tcplugins-pmc.md
- + changelog.d/typecheckModule-API.md
- + changelog.d/wasm-fix-serviceworker
- + changelog.d/windows-rethrow-overlapped-exception
- + changelog.d/withTcPlugins.md
- compiler/GHC.hs
- compiler/GHC/ByteCode/Asm.hs
- compiler/GHC/ByteCode/Binary.hs
- compiler/GHC/ByteCode/Instr.hs
- compiler/GHC/ByteCode/Types.hs
- compiler/GHC/Cmm/Lexer.x
- compiler/GHC/Cmm/Opt.hs
- compiler/GHC/Cmm/Parser.y
- compiler/GHC/CmmToAsm/AArch64/CodeGen.hs
- compiler/GHC/CmmToAsm/X86/CodeGen.hs
- compiler/GHC/CmmToLlvm/Base.hs
- compiler/GHC/CmmToLlvm/CodeGen.hs
- compiler/GHC/Core.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/Coercion/Opt.hs
- compiler/GHC/Core/Lint.hs
- compiler/GHC/Core/Make.hs
- compiler/GHC/Core/Opt/Arity.hs
- compiler/GHC/Core/Opt/ConstantFold.hs
- compiler/GHC/Core/Opt/FloatIn.hs
- compiler/GHC/Core/Opt/FloatOut.hs
- compiler/GHC/Core/Opt/Monad.hs
- compiler/GHC/Core/Opt/OccurAnal.hs
- compiler/GHC/Core/Opt/Simplify/Env.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Opt/Simplify/Utils.hs
- compiler/GHC/Core/Opt/SpecConstr.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Core/Ppr.hs
- compiler/GHC/Core/Rules.hs
- compiler/GHC/Core/SimpleOpt.hs
- compiler/GHC/Core/TyCo/Subst.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Data/FastString.hs
- compiler/GHC/Data/List/SetOps.hs
- compiler/GHC/Data/Pair.hs
- compiler/GHC/Driver/Backend.hs
- compiler/GHC/Driver/Backpack.hs
- compiler/GHC/Driver/CodeOutput.hs
- compiler/GHC/Driver/Config.hs
- compiler/GHC/Driver/Config/Core/Lint.hs
- compiler/GHC/Driver/Config/Interpreter.hs
- compiler/GHC/Driver/Downsweep.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Env/Types.hs
- compiler/GHC/Driver/Errors/Ppr.hs
- compiler/GHC/Driver/Errors/Types.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Main.hs
- + compiler/GHC/Driver/Main/Compile.hs
- compiler/GHC/Driver/Main.hs-boot → compiler/GHC/Driver/Main/Compile.hs-boot
- + compiler/GHC/Driver/Main/Hsc.hs
- + compiler/GHC/Driver/Main/Interactive.hs
- + compiler/GHC/Driver/Main/Passes.hs
- + compiler/GHC/Driver/Main/Passes.hs-boot
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/MakeAction.hs
- compiler/GHC/Driver/MakeSem.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Driver/Pipeline/Monad.hs
- compiler/GHC/Driver/Pipeline/Phases.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Basic.hs
- compiler/GHC/Hs/Binds.hs
- compiler/GHC/Hs/Decls.hs
- compiler/GHC/Hs/Dump.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/Expr.hs-boot
- compiler/GHC/Hs/ImpExp.hs
- compiler/GHC/Hs/Instances.hs
- compiler/GHC/Hs/Pat.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/HsToCore.hs
- compiler/GHC/HsToCore/Coverage.hs
- compiler/GHC/HsToCore/Docs.hs
- compiler/GHC/HsToCore/Errors/Ppr.hs
- compiler/GHC/HsToCore/Errors/Types.hs
- compiler/GHC/HsToCore/Foreign/JavaScript.hs
- compiler/GHC/HsToCore/Monad.hs
- compiler/GHC/HsToCore/Pmc.hs
- compiler/GHC/HsToCore/Pmc/Solver.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/HsToCore/Ticks.hs
- compiler/GHC/HsToCore/Types.hs
- compiler/GHC/Iface/Binary.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Iface/Load.hs
- compiler/GHC/Iface/Tidy.hs
- compiler/GHC/IfaceToCore.hs
- compiler/GHC/Linker/Executable.hs
- compiler/GHC/Linker/Loader.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Annotation.hs
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Errors/Types.hs
- compiler/GHC/Parser/Lexer.x
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Parser/PostProcess/Haddock.hs
- compiler/GHC/Parser/Types.hs
- compiler/GHC/Rename/Bind.hs
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Rename/Expr.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/Rename/Module.hs
- compiler/GHC/Rename/Names.hs
- compiler/GHC/Rename/Pat.hs
- compiler/GHC/Rename/Splice.hs
- compiler/GHC/Runtime/Eval.hs
- compiler/GHC/Runtime/Heap/Inspect.hs
- compiler/GHC/Runtime/Interpreter.hs
- compiler/GHC/Runtime/Loader.hs
- compiler/GHC/Settings.hs
- compiler/GHC/Settings/Constants.hs
- compiler/GHC/Settings/IO.hs
- compiler/GHC/Stg/Pipeline.hs
- compiler/GHC/StgToByteCode.hs
- compiler/GHC/StgToJS/Ids.hs
- compiler/GHC/SysTools/Cpp.hs
- compiler/GHC/Tc/Errors/Hole.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Bind.hs
- compiler/GHC/Tc/Gen/Expand.hs
- compiler/GHC/Tc/Gen/Export.hs
- compiler/GHC/Tc/Gen/Expr.hs
- compiler/GHC/Tc/Gen/Head.hs
- compiler/GHC/Tc/Gen/HsType.hs
- compiler/GHC/Tc/Gen/Pat.hs
- compiler/GHC/Tc/Gen/Sig.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Tc/Solver/Default.hs
- compiler/GHC/Tc/Solver/Rewrite.hs
- compiler/GHC/Tc/Solver/Solve.hs
- compiler/GHC/Tc/TyCl/PatSyn.hs
- compiler/GHC/Tc/Types.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Types/Origin.hs
- compiler/GHC/Tc/Utils/Backpack.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/Error.hs
- compiler/GHC/Types/Error.hs-boot
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/ForeignStubs.hs
- compiler/GHC/Types/Hint.hs
- compiler/GHC/Types/Hint/Ppr.hs
- compiler/GHC/Types/HpcInfo.hs
- compiler/GHC/Types/Id/Make.hs
- compiler/GHC/Types/Name/Cache.hs
- compiler/GHC/Types/Name/Reader.hs
- compiler/GHC/Types/Unique.hs
- compiler/GHC/Types/Unique/DSet.hs
- compiler/GHC/Types/Unique/Supply.hs
- compiler/GHC/Unit/Finder.hs
- compiler/GHC/Unit/Module/Deps.hs
- compiler/GHC/Unit/Module/Graph.hs
- compiler/GHC/Unit/Module/ModGuts.hs
- compiler/GHC/Unit/State.hs
- compiler/GHC/Utils/Binary.hs
- compiler/GHC/Utils/Misc.hs
- compiler/GHC/Utils/Ppr/Colour.hs
- compiler/Language/Haskell/Syntax/Binds.hs
- compiler/Language/Haskell/Syntax/Decls.hs
- compiler/Language/Haskell/Syntax/Decls/Foreign.hs
- compiler/Language/Haskell/Syntax/Extension.hs
- compiler/Language/Haskell/Syntax/ImpExp.hs
- compiler/Language/Haskell/Syntax/Pat.hs
- compiler/Language/Haskell/Syntax/Type.hs
- compiler/ghc.cabal.in
- configure.ac
- distrib/configure.ac.in
- docs/users_guide/debug-info.rst
- docs/users_guide/extending_ghc.rst
- docs/users_guide/exts/explicit_namespaces.rst
- docs/users_guide/exts/linear_types.rst
- docs/users_guide/exts/modifiers.rst
- docs/users_guide/exts/qualified_strings.rst
- docs/users_guide/exts/required_type_arguments.rst
- docs/users_guide/exts/stolen_syntax.rst
- docs/users_guide/exts/template_haskell.rst
- docs/users_guide/profiling.rst
- docs/users_guide/runtime_control.rst
- docs/users_guide/using-warnings.rst
- docs/users_guide/using.rst
- ghc/GHC/Driver/Session/Mode.hs
- ghc/GHCi/UI.hs
- ghc/GHCi/UI/Info.hs
- ghc/Main.hs
- ghc/ghc-bin.cabal.in
- hadrian/README.md
- hadrian/build-cabal.bat
- hadrian/cfg/default.host.target.in
- hadrian/cfg/default.target.in
- hadrian/doc/flavours.md
- hadrian/doc/user-settings.md
- hadrian/src/Builder.hs
- hadrian/src/CommandLine.hs
- hadrian/src/Flavour.hs
- hadrian/src/Flavour/Type.hs
- hadrian/src/Hadrian/Builder.hs
- hadrian/src/Hadrian/Builder/Ar.hs
- hadrian/src/Hadrian/Haskell/Cabal/Parse.hs
- hadrian/src/Hadrian/Haskell/Cabal/Type.hs
- hadrian/src/Hadrian/Utilities.hs
- hadrian/src/Main.hs
- hadrian/src/Rules/BinaryDist.hs
- hadrian/src/Rules/Generate.hs
- hadrian/src/Rules/Library.hs
- hadrian/src/Rules/Register.hs
- hadrian/src/Rules/Rts.hs
- hadrian/src/Settings.hs
- hadrian/src/Settings/Builders/Ghc.hs
- hadrian/src/Settings/Builders/RunTest.hs
- hadrian/src/Settings/Default.hs
- hadrian/src/Settings/Packages.hs
- libraries/base/changelog.md
- libraries/base/src/Control/Concurrent.hs
- libraries/base/src/Control/Exception.hs
- libraries/base/src/Control/Monad/IO/Class.hs
- libraries/base/src/Data/Data.hs
- libraries/base/src/Data/Fixed.hs
- libraries/base/src/Data/Functor/Classes.hs
- libraries/base/src/Data/Functor/Compose.hs
- libraries/base/src/Data/List/NonEmpty.hs
- libraries/base/src/Data/Version.hs
- libraries/base/src/GHC/Base.hs
- libraries/base/src/GHC/ByteOrder.hs
- libraries/base/src/GHC/Exts.hs
- libraries/base/src/GHC/IO/Handle.hs
- libraries/base/src/Numeric.hs
- libraries/base/src/Prelude.hs
- libraries/base/src/System/IO.hs
- libraries/base/src/System/Timeout.hs
- libraries/base/src/Text/Printf.hs
- libraries/base/src/Text/Read.hs
- libraries/base/tests/perf/ElemNoFusion_O1.stderr
- libraries/base/tests/perf/ElemNoFusion_O2.stderr
- libraries/ghc-bignum/ghc-bignum.cabal
- + libraries/ghc-boot/GHC/Data/ShortByteString.hs
- libraries/ghc-boot/GHC/Settings/Utils.hs
- libraries/ghc-boot/ghc-boot.cabal.in
- libraries/ghc-experimental/src/Data/Sum/Experimental.hs
- libraries/ghc-experimental/src/Data/Tuple/Experimental.hs
- libraries/ghc-internal/bignum-backend.rst
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/include/CTypes.h
- libraries/ghc-internal/src/GHC/Internal/Base.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend.hs
- − libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/Check.hs
- − libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/FFI.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/Native.hs
- − libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/Selected.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Data.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Version.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Windows.hsc
- libraries/ghc-internal/src/GHC/Internal/Exts.hs
- libraries/ghc-internal/src/GHC/Internal/Float.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Device.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Types.hs
- libraries/ghc-internal/src/GHC/Internal/IO/IOMode.hs
- libraries/ghc-internal/src/GHC/Internal/List.hs
- libraries/ghc-internal/src/GHC/Internal/Numeric.hs
- libraries/ghc-internal/src/GHC/Internal/RTS/Flags.hsc
- libraries/ghc-internal/src/GHC/Internal/Read.hs
- libraries/ghc-internal/src/GHC/Internal/System/IO.hs
- − libraries/ghc-internal/src/GHC/Internal/Text/Read.hs
- libraries/ghc-internal/src/GHC/Internal/Types.hs
- + libraries/ghci/GHCi/Coverage.hs
- libraries/ghci/GHCi/Message.hs
- libraries/ghci/GHCi/Run.hs
- libraries/ghci/GHCi/TH.hs
- libraries/ghci/ghci.cabal.in
- libraries/process
- libraries/semaphore-compat
- m4/find_llvm_prog.m4
- m4/fp_setup_windows_toolchain.m4
- m4/ghc_toolchain.m4
- m4/prep_target_file.m4
- rts/.gitignore
- rts/Disassembler.c
- rts/Hpc.c
- rts/IOManager.h
- rts/IPE.c
- rts/Interpreter.c
- rts/Linker.c
- rts/LinkerInternals.h
- rts/Messages.c
- rts/RtsFlags.c
- rts/RtsSymbols.c
- rts/RtsSymbols.h
- rts/StgMiscClosures.cmm
- rts/ThreadPaused.c
- rts/Threads.c
- rts/Threads.h
- rts/Trace.c
- rts/Trace.h
- rts/Updates.h
- rts/include/rts/Bytecodes.h
- rts/include/rts/EventLogWriter.h
- rts/include/rts/Flags.h
- rts/include/rts/storage/ClosureMacros.h
- rts/include/rts/storage/Closures.h
- rts/include/stg/MiscClosures.h
- rts/linker/Elf.c
- + rts/posix/FdWakeup.c
- + rts/posix/FdWakeup.h
- rts/posix/Ticker.c
- − rts/posix/ticker/Pthread.c
- − rts/posix/ticker/TimerFd.c
- rts/rts.cabal
- rts/sm/BlockAlloc.c
- rts/sm/MBlock.c
- rts/sm/NonMoving.c
- + rts/win32/libHSghc-internal.def.in
- testsuite/driver/testlib.py
- + testsuite/tests/MiniQuickCheck.hs
- testsuite/tests/codeGen/should_compile/T25177.stderr
- + testsuite/tests/codeGen/should_gen_asm/aarch64-shl-subword.asm
- + testsuite/tests/codeGen/should_gen_asm/aarch64-shl-subword.hs
- + testsuite/tests/codeGen/should_gen_asm/aarch64-ushr-subword.asm
- + testsuite/tests/codeGen/should_gen_asm/aarch64-ushr-subword.hs
- testsuite/tests/codeGen/should_gen_asm/all.T
- + testsuite/tests/codeGen/should_run/T27072d.hs
- + testsuite/tests/codeGen/should_run/T27072d.stdout
- + testsuite/tests/codeGen/should_run/T27072d_c.c
- + testsuite/tests/codeGen/should_run/T27072d_check.c
- + testsuite/tests/codeGen/should_run/T27072w.hs
- + testsuite/tests/codeGen/should_run/T27072w.stdout
- + testsuite/tests/codeGen/should_run/T27072w_c.c
- + testsuite/tests/codeGen/should_run/aarch64-subword-ops.hs
- + testsuite/tests/codeGen/should_run/aarch64-subword-ops.stdout
- + testsuite/tests/codeGen/should_run/aarch64-ushr-subword-run.hs
- + testsuite/tests/codeGen/should_run/aarch64-ushr-subword-run.stdout
- testsuite/tests/codeGen/should_run/all.T
- testsuite/tests/deSugar/should_compile/T13208.stdout
- testsuite/tests/diagnostic-codes/codes.stdout
- + testsuite/tests/driver/T10531/A.hs
- + testsuite/tests/driver/T10531/B.hs
- + testsuite/tests/driver/T10531/C.hs
- + testsuite/tests/driver/T10531/Makefile
- + testsuite/tests/driver/T10531/all.T
- testsuite/tests/driver/fat-iface/fat014.stdout
- testsuite/tests/ffi/should_run/all.T
- + testsuite/tests/ghc-api/T24386.hs
- testsuite/tests/ghc-api/T25121_status.stdout
- testsuite/tests/ghc-api/T26910.hs
- + testsuite/tests/ghc-api/T27273.hs
- testsuite/tests/ghc-api/T6145.hs
- testsuite/tests/ghc-api/all.T
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/A.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/B.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/C.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/D.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/X.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/Y.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.modules/Z.hs
- + testsuite/tests/ghc-api/downsweep/IncrementalDownsweep.stdout
- testsuite/tests/ghc-api/downsweep/OldModLocation.hs
- testsuite/tests/ghc-api/downsweep/PartialDownsweep.hs
- testsuite/tests/ghc-api/downsweep/all.T
- testsuite/tests/ghc-api/fixed-nodes/InterfaceModuleGraph.hs
- + testsuite/tests/ghc-api/settings/LibDir.hs
- + testsuite/tests/ghc-api/settings/LibDir.stdout
- + testsuite/tests/ghc-api/settings/all.T
- + testsuite/tests/ghci/prog-mhu006/Makefile
- + testsuite/tests/ghci/prog-mhu006/a/A.hs
- + testsuite/tests/ghci/prog-mhu006/all.T
- + testsuite/tests/ghci/prog-mhu006/b/B.hs
- + testsuite/tests/ghci/prog-mhu006/prog-mhu006a.script
- + testsuite/tests/ghci/prog-mhu006/prog-mhu006a.stdout
- + testsuite/tests/ghci/prog-mhu006/unitA
- + testsuite/tests/ghci/prog-mhu006/unitB
- testsuite/tests/ghci/prog003/prog003.script
- testsuite/tests/ghci/prog018/prog018.stdout
- testsuite/tests/ghci/prog020/Makefile
- testsuite/tests/ghci/prog020/all.T
- testsuite/tests/ghci/prog020/ghci.prog020.script → testsuite/tests/ghci/prog020/ghci.prog020a.script
- testsuite/tests/ghci/prog020/ghci.prog020.stderr → testsuite/tests/ghci/prog020/ghci.prog020a.stderr
- testsuite/tests/ghci/prog020/ghci.prog020.stdout → testsuite/tests/ghci/prog020/ghci.prog020a.stdout
- + testsuite/tests/ghci/prog020/ghci.prog020b.script
- + testsuite/tests/ghci/prog020/ghci.prog020b.stderr
- + testsuite/tests/ghci/prog020/ghci.prog020b.stdout
- + testsuite/tests/ghci/prog023/Makefile
- + testsuite/tests/ghci/prog023/all.T
- + testsuite/tests/ghci/prog023/prog023a.script
- + testsuite/tests/ghci/prog023/prog023a.stdout
- + testsuite/tests/ghci/prog023/prog023b.script
- + testsuite/tests/ghci/prog023/prog023b.stdout
- + testsuite/tests/ghci/prog023/src/A.hs
- + testsuite/tests/ghci/prog024/Makefile
- + testsuite/tests/ghci/prog024/all.T
- + testsuite/tests/ghci/prog024/prog024a.script
- + testsuite/tests/ghci/prog024/prog024a.stdout
- + testsuite/tests/ghci/prog024/prog024b.script
- + testsuite/tests/ghci/prog024/prog024b.stdout
- + testsuite/tests/ghci/prog024/prog024c.script
- + testsuite/tests/ghci/prog024/prog024c.stderr
- + testsuite/tests/ghci/prog024/prog024c.stdout
- + testsuite/tests/ghci/prog024/prog024d.script
- + testsuite/tests/ghci/prog024/prog024d.stderr
- + testsuite/tests/ghci/prog024/prog024d.stdout
- + testsuite/tests/ghci/prog024/prog024e.script
- + testsuite/tests/ghci/prog024/prog024e.stdout
- + testsuite/tests/ghci/prog024/prog024f.script
- + testsuite/tests/ghci/prog024/prog024f.stdout
- + testsuite/tests/ghci/prog024/src/A.hs
- + testsuite/tests/ghci/prog024/src/B.hs
- + testsuite/tests/ghci/prog025/Makefile
- + testsuite/tests/ghci/prog025/a/A.hs
- + testsuite/tests/ghci/prog025/all.T
- + testsuite/tests/ghci/prog025/prog025a.script
- + testsuite/tests/ghci/prog025/prog025a.stdout
- + testsuite/tests/ghci/prog025/prog025b.script
- + testsuite/tests/ghci/prog025/prog025b.stdout
- + testsuite/tests/ghci/prog025/testpkg/Test.hs
- + testsuite/tests/ghci/prog025/testpkg/testpkg-0.1.0.0.pkg
- + testsuite/tests/ghci/prog025/testpkg/testpkg-0.2.0.0.pkg
- + testsuite/tests/ghci/prog025/unitA
- testsuite/tests/ghci/scripts/ListTuplePunsPprNoAbbrevTuple.stdout
- testsuite/tests/ghci/scripts/T13997.stdout
- testsuite/tests/ghci/scripts/T1914.stdout
- testsuite/tests/ghci/scripts/T20217.stdout
- testsuite/tests/ghci/scripts/T8042.stdout
- testsuite/tests/ghci/scripts/T8042recomp.stdout
- testsuite/tests/ghci/scripts/all.T
- testsuite/tests/ghci/should_run/T10920.stderr
- testsuite/tests/ghci/should_run/tc-plugin-ghci/TcPluginGHCi.hs
- testsuite/tests/haddock/should_compile_flag_haddock/T17544_kw.stderr
- testsuite/tests/hpc/Makefile
- testsuite/tests/hpc/T17073.stdout → testsuite/tests/hpc/T17073a.stdout
- + testsuite/tests/hpc/T17073b.stdout
- testsuite/tests/hpc/T20568.stdout → testsuite/tests/hpc/T20568a.stdout
- + testsuite/tests/hpc/T20568b.stdout
- testsuite/tests/hpc/all.T
- testsuite/tests/hpc/fork/Makefile
- testsuite/tests/hpc/function/Makefile
- testsuite/tests/hpc/function/test.T
- + testsuite/tests/hpc/function/tough1.stderr
- + testsuite/tests/hpc/function/tough1.stdout
- testsuite/tests/hpc/function2/test.T
- + testsuite/tests/hpc/function2/tough3.script
- + testsuite/tests/hpc/ghc_ghci/BytecodeMain.hs
- testsuite/tests/hpc/ghc_ghci/Makefile
- + testsuite/tests/hpc/ghc_ghci/hpc_ghc_ghci_bytecode.stdout
- + testsuite/tests/hpc/ghc_ghci/hpc_ghci01.stdout
- + testsuite/tests/hpc/ghc_ghci/hpc_ghci02.stdout
- testsuite/tests/hpc/ghc_ghci/test.T
- testsuite/tests/hpc/simple/Makefile
- + testsuite/tests/hpc/simple/hpc002.hs
- + testsuite/tests/hpc/simple/hpc002.stdout
- + testsuite/tests/hpc/simple/hpc003.hs
- + testsuite/tests/hpc/simple/hpc003.script
- + testsuite/tests/hpc/simple/hpc003.stdout
- testsuite/tests/hpc/simple/test.T
- + testsuite/tests/interface-stability/.gitignore
- testsuite/tests/interface-stability/README.mkd
- testsuite/tests/interface-stability/base-exports.stdout
- testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs
- testsuite/tests/interface-stability/base-exports.stdout-mingw32
- − testsuite/tests/interface-stability/base-exports.stdout-ws-32
- + testsuite/tests/interface-stability/download-base-exports.sh
- testsuite/tests/interface-stability/ghc-experimental-exports.stdout
- testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32
- testsuite/tests/interface-stability/ghc-prim-exports.stdout
- testsuite/tests/interface-stability/ghc-prim-exports.stdout-mingw32
- testsuite/tests/linters/notes.stdout
- testsuite/tests/numeric/should_compile/T15547.stderr
- testsuite/tests/numeric/should_compile/T20347.stderr
- testsuite/tests/numeric/should_compile/T20374.stderr
- testsuite/tests/numeric/should_compile/T20376.stderr
- testsuite/tests/numeric/should_run/all.T
- testsuite/tests/numeric/should_run/foundation.hs
- testsuite/tests/parser/should_compile/DumpParsedAst.stderr
- testsuite/tests/parser/should_compile/DumpRenamedAst.stderr
- testsuite/tests/parser/should_compile/KindSigs.stderr
- testsuite/tests/parser/should_compile/ListTuplePunsSuccess1.hs
- testsuite/tests/parser/should_compile/T20452.stderr
- testsuite/tests/parser/should_compile/T20846.stderr
- testsuite/tests/parser/should_compile/all.T
- + testsuite/tests/parser/should_fail/ListTuplePunsFail6.hs
- + testsuite/tests/parser/should_fail/ListTuplePunsFail6.stderr
- testsuite/tests/parser/should_fail/RecordDotSyntaxFail8.stderr
- testsuite/tests/parser/should_fail/RecordDotSyntaxFail9.stderr
- testsuite/tests/parser/should_fail/all.T
- testsuite/tests/parser/should_run/ListTuplePunsConstraints.hs
- testsuite/tests/perf/compiler/Makefile
- + testsuite/tests/perf/compiler/T26989.hs
- + testsuite/tests/perf/compiler/T26989a.hs
- testsuite/tests/perf/compiler/all.T
- testsuite/tests/perf/compiler/genMultiComp.py
- + testsuite/tests/perf/should_run/T11226.hs
- + testsuite/tests/perf/should_run/T11226.stdout
- testsuite/tests/perf/should_run/all.T
- testsuite/tests/plugins/defaulting-plugin/DefaultInterference.hs
- testsuite/tests/plugins/defaulting-plugin/DefaultInvalid.hs
- testsuite/tests/plugins/defaulting-plugin/DefaultLifted.hs
- testsuite/tests/plugins/defaulting-plugin/DefaultMultiParam.hs
- testsuite/tests/plugins/echo-plugin/Echo.hs
- testsuite/tests/plugins/plugins09.stdout
- testsuite/tests/plugins/plugins10.stdout
- testsuite/tests/plugins/plugins11.stdout
- testsuite/tests/plugins/static-plugins.stdout
- testsuite/tests/printer/Makefile
- + testsuite/tests/printer/PprInfixHole.hs
- testsuite/tests/printer/PprModifiers.hs
- + testsuite/tests/printer/PprQualifiedStrings.hs
- testsuite/tests/printer/T18052a.stderr
- + testsuite/tests/printer/Test27291.hs
- testsuite/tests/printer/all.T
- testsuite/tests/profiling/should_run/callstack001.stdout
- testsuite/tests/quasiquotation/T7918.hs
- testsuite/tests/rebindable/T19918.stdout
- + testsuite/tests/rts/T25275/DebugIpe.hs
- + testsuite/tests/rts/T25275/T25275_A.stdout
- + testsuite/tests/rts/T25275/T25275_B.stdout
- + testsuite/tests/rts/T25275/T25275_C.stdout
- + testsuite/tests/rts/T25275/T25275_D.stdout
- + testsuite/tests/rts/T25275/TraceIpe.hs
- + testsuite/tests/rts/T25275/all.T
- + testsuite/tests/rts/T27131.hs
- + testsuite/tests/rts/T27131.stdout
- + testsuite/tests/rts/T27131_c.c
- testsuite/tests/rts/all.T
- + testsuite/tests/rts/linker/T27072/Lib.c
- + testsuite/tests/rts/linker/T27072/Makefile
- + testsuite/tests/rts/linker/T27072/T27072.stdout
- + testsuite/tests/rts/linker/T27072/all.T
- + testsuite/tests/rts/linker/T27072/main.c
- + testsuite/tests/simd/should_run/Makefile
- + testsuite/tests/simd/should_run/T25030.hs
- + testsuite/tests/simd/should_run/T25030.stdout
- testsuite/tests/simd/should_run/all.T
- testsuite/tests/simd/should_run/simd006.hs
- testsuite/tests/simplCore/should_compile/DsSpecPragmas.stderr
- testsuite/tests/simplCore/should_compile/RewriteHigherOrderPatterns.stderr
- testsuite/tests/simplCore/should_compile/T15205.stderr
- testsuite/tests/simplCore/should_compile/T18668.stderr
- testsuite/tests/simplCore/should_compile/T19246.stderr
- testsuite/tests/simplCore/should_compile/T19599.stderr
- testsuite/tests/simplCore/should_compile/T19599a.stderr
- testsuite/tests/simplCore/should_compile/T21917.stderr
- testsuite/tests/simplCore/should_compile/T23074.stderr
- testsuite/tests/simplCore/should_compile/T24359a.stderr
- testsuite/tests/simplCore/should_compile/T25160.stderr
- testsuite/tests/simplCore/should_compile/T25718c.stderr-ws-32
- testsuite/tests/simplCore/should_compile/T25718c.stderr-ws-64
- testsuite/tests/simplCore/should_compile/T26051.stderr
- testsuite/tests/simplCore/should_compile/T26116.stderr
- + testsuite/tests/simplCore/should_compile/T27261.hs
- + testsuite/tests/simplCore/should_compile/T27261_aux.hs
- testsuite/tests/simplCore/should_compile/T8331.stderr
- testsuite/tests/simplCore/should_compile/T8848a.stderr
- testsuite/tests/simplCore/should_compile/all.T
- testsuite/tests/simplCore/should_compile/spec004.stderr
- testsuite/tests/tcplugins/Common.hs
- testsuite/tests/tcplugins/RewritePerfPlugin.hs
- testsuite/tests/tcplugins/T11462_Plugin.hs
- testsuite/tests/tcplugins/T11525_Plugin.hs
- testsuite/tests/tcplugins/T26395_Plugin.hs
- + testsuite/tests/tcplugins/TcPlugin_InitStop_Ghci.hs
- + testsuite/tests/tcplugins/TcPlugin_InitStop_Ghci.script
- + testsuite/tests/tcplugins/TcPlugin_InitStop_Ghci.stderr
- + testsuite/tests/tcplugins/TcPlugin_InitStop_Ghci.stdout
- + testsuite/tests/tcplugins/TcPlugin_InitStop_NoCode.hs
- + testsuite/tests/tcplugins/TcPlugin_InitStop_NoCode.hs-boot
- + testsuite/tests/tcplugins/TcPlugin_InitStop_NoCode.stderr
- + testsuite/tests/tcplugins/TcPlugin_InitStop_NoCode_aux.hs
- + testsuite/tests/tcplugins/TcPlugin_InitStop_Warn.hs
- + testsuite/tests/tcplugins/TcPlugin_InitStop_Warn.stderr
- testsuite/tests/tcplugins/all.T
- + testsuite/tests/tcplugins/tc-plugin-initstop/Makefile
- + testsuite/tests/tcplugins/tc-plugin-initstop/Setup.hs
- + testsuite/tests/tcplugins/tc-plugin-initstop/TcPlugin_InitStop_Plugin.hs
- + testsuite/tests/tcplugins/tc-plugin-initstop/tc-plugin-initstop.cabal
- testsuite/tests/th/T24111.stdout
- + testsuite/tests/th/T27022.hs
- + testsuite/tests/th/T27022.stdout
- testsuite/tests/th/all.T
- testsuite/tests/typecheck/should_compile/T13032.stderr
- + testsuite/tests/typecheck/should_compile/T23135.hs
- testsuite/tests/typecheck/should_compile/T9497a.stderr
- testsuite/tests/typecheck/should_compile/all.T
- testsuite/tests/typecheck/should_compile/holes.stderr
- testsuite/tests/typecheck/should_compile/holes3.stderr
- testsuite/tests/typecheck/should_compile/subsumption_sort_hole_fits.stderr
- testsuite/tests/typecheck/should_compile/valid_hole_fits.stderr
- testsuite/tests/typecheck/should_fail/T21130.stderr
- + testsuite/tests/typecheck/should_fail/T27210.hs
- + testsuite/tests/typecheck/should_fail/T27210.stderr
- testsuite/tests/typecheck/should_fail/T9497d.stderr
- testsuite/tests/typecheck/should_fail/all.T
- testsuite/tests/typecheck/should_run/T9497a-run.stderr
- testsuite/tests/typecheck/should_run/T9497b-run.stderr
- testsuite/tests/typecheck/should_run/T9497c-run.stderr
- testsuite/tests/wasm/should_run/control-flow/LoadCmmGroup.hs
- utils/check-exact/ExactPrint.hs
- utils/check-exact/Main.hs
- utils/ghc-pkg/Main.hs
- utils/ghc-toolchain/exe/Main.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Program.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Target.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Hoogle.hs
- utils/haddock/haddock-api/src/Haddock/Backends/LaTeX.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Decl.hs
- utils/haddock/haddock-api/src/Haddock/Convert.hs
- utils/haddock/haddock-api/src/Haddock/GhcUtils.hs
- utils/haddock/haddock-api/src/Haddock/Interface/AttachInstances.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Rename.hs
- utils/haddock/haddock-api/src/Haddock/Interface/RenameType.hs
- utils/haddock/haddock-api/src/Haddock/Types.hs
- utils/haddock/html-test/ref/Bug1004.html
- utils/haddock/html-test/ref/Bug973.html
- utils/haddock/html-test/ref/ConstructorPatternExport.html
- utils/haddock/html-test/ref/DefaultSignatures.html
- utils/haddock/html-test/ref/Hash.html
- utils/haddock/html-test/ref/PatternSyns.html
- utils/haddock/html-test/ref/PatternSyns2.html
- utils/haddock/html-test/ref/QuasiExpr.html
- utils/haddock/html-test/ref/Test.html
- utils/jsffi/prelude.mjs
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/b58f6422c1cdcd465b273e55cbb043…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/b58f6422c1cdcd465b273e55cbb043…
You're receiving this email because of your account on gitlab.haskell.org.
1
0
Apoorv Ingle pushed new branch wip/ani/th-rs at Glasgow Haskell Compiler / GHC
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/ani/th-rs
You're receiving this email because of your account on gitlab.haskell.org.
1
0
[Git][ghc/ghc][wip/sjakobi/T25450-print-cpu] Fix print_enabled_cpu_features_unknown_flag.stderr
by Simon Jakobi (＠sjakobi2) 01 Jun '26
by Simon Jakobi (＠sjakobi2) 01 Jun '26
01 Jun '26
Simon Jakobi pushed to branch wip/sjakobi/T25450-print-cpu at Glasgow Haskell Compiler / GHC
Commits:
a57d2603 by Simon Jakobi at 2026-06-01T16:42:03+02:00
Fix print_enabled_cpu_features_unknown_flag.stderr
- - - - -
1 changed file:
- testsuite/tests/driver/print_enabled_cpu_features_unknown_flag.stderr
Changes:
=====================================
testsuite/tests/driver/print_enabled_cpu_features_unknown_flag.stderr
=====================================
@@ -1 +1,6 @@
-unrecognised flag: -mavx22
+ghc: unrecognised flag: -mavx22
+did you mean one of:
+ -mavx2
+ -mavx
+
+Usage: For basic information, try the `--help' option.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/a57d2603d61e102fbc104b6ad8e2a7e…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/a57d2603d61e102fbc104b6ad8e2a7e…
You're receiving this email because of your account on gitlab.haskell.org.
1
0