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[Git][ghc/ghc][master] add changelog entry for #26233
by Marge Bot (＠marge-bot) 14 Apr '26

14 Apr '26

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: 71462fff by Luite Stegeman at 2026-04-13T15:17:38-04:00 add changelog entry for #26233 - - - - - 1 changed file: - + changelog.d/fix-ghci-duplicate-warnings-26233 Changes: ===================================== changelog.d/fix-ghci-duplicate-warnings-26233 ===================================== @@ -0,0 +1,4 @@ +section: ghci +synopsis: Fix duplicate warnings in GHCi when typechecking statements. +issues: #26233 +mrs: !15860 View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/71462fff006e784d72e2bda68b1e90f… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/71462fff006e784d72e2bda68b1e90f… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][master] Typo ~/ghc/arch-os-version/environments
by Marge Bot (＠marge-bot) 14 Apr '26

14 Apr '26

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: c5b80dd0 by Phil de Joux at 2026-04-13T15:16:51-04:00 Typo ~/ghc/arch-os-version/environments - - - - - 1 changed file: - docs/users_guide/packages.rst Changes: ===================================== docs/users_guide/packages.rst ===================================== @@ -600,7 +600,7 @@ must be relative to the location of the package environment file. :category: Use the package environment in ⟨file⟩, or in - ``$XDG_DATA_HOME/ghc/arch-os-version/environments/⟨name⟩`` + ``$XDG_DATA_HOME/.ghc/arch-os-version/environments/⟨name⟩`` If set to ``-`` no package environment is read. .. envvar:: GHC_ENVIRONMENT @@ -613,13 +613,13 @@ locations: - File ⟨file⟩ if you pass the option :ghc-flag:`-package-env ⟨file⟩|⟨name⟩`. -- File ``$XDG_DATA_HOME/ghc/arch-os-version/environments/name`` if you pass the +- File ``$XDG_DATA_HOME/.ghc/arch-os-version/environments/name`` if you pass the option ``-package-env ⟨name⟩``. - File ⟨file⟩ if the environment variable :envvar:`GHC_ENVIRONMENT` is set to ⟨file⟩. -- File ``$XDG_DATA_HOME/ghc/arch-os-version/environments/name`` if the +- File ``$XDG_DATA_HOME/.ghc/arch-os-version/environments/name`` if the environment variable :envvar:`GHC_ENVIRONMENT` is set to ⟨name⟩. Additionally, unless ``-hide-all-packages`` is specified ``ghc`` will also @@ -628,7 +628,7 @@ look for the package environment in the following locations: - File ``.ghc.environment.arch-os-version`` if it exists in the current directory or any parent directory (but not the user's home directory). -- File ``$XDG_DATA_HOME/ghc/arch-os-version/environments/default`` if it +- File ``$XDG_DATA_HOME/.ghc/arch-os-version/environments/default`` if it exists. Package environments can be modified by further command line arguments; View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/c5b80dd04792d7516946de226120c5f… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/c5b80dd04792d7516946de226120c5f… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][master] Suppress desugaring warnings in the pattern match checker
by Marge Bot (＠marge-bot) 14 Apr '26

14 Apr '26

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: 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 - - - - - 5 changed files: - + changelog.d/fix-duplicate-pmc-warnings - compiler/GHC/HsToCore/Pmc/Desugar.hs - + testsuite/tests/deSugar/should_compile/T25996.hs - + testsuite/tests/deSugar/should_compile/T25996.stderr - testsuite/tests/deSugar/should_compile/all.T Changes: ===================================== changelog.d/fix-duplicate-pmc-warnings ===================================== @@ -0,0 +1,6 @@ +section: compiler +synopsis: Fix duplicate desugaring warnings emitted by the pattern match checker. + The pattern match checker now suppresses warnings that are already reported + by the main desugaring pass. +issues: #25996 +mrs: !15859 ===================================== compiler/GHC/HsToCore/Pmc/Desugar.hs ===================================== @@ -375,16 +375,18 @@ desugarConPatOut x con univ_tys ex_tvs dicts = \case desugarPatBind :: SrcSpan -> Id -> Pat GhcTc -> DsM (PmPatBind Pre) -- See 'GrdPatBind' for how this simply repurposes GrdGRHS. -desugarPatBind loc var pat = +-- See Note [Suppress warnings in PMC desugaring] +desugarPatBind loc var pat = discardWarningsDs $ PmPatBind . flip PmGRHS (SrcInfo (L loc (ppr pat))) <$> desugarPat var pat desugarEmptyCase :: Id -> DsM PmEmptyCase desugarEmptyCase var = pure PmEmptyCase { pe_var = var } -- | Desugar the non-empty 'Match'es of a 'MatchGroup'. +-- See Note [Suppress warnings in PMC desugaring] desugarMatches :: [Id] -> NonEmpty (LMatch GhcTc (LHsExpr GhcTc)) -> DsM (PmMatchGroup Pre) -desugarMatches vars matches = +desugarMatches vars matches = discardWarningsDs $ PmMatchGroup <$> traverse (desugarMatch vars) matches -- Desugar a single match @@ -398,8 +400,9 @@ desugarMatch vars (L match_loc (Match { m_pats = L _ pats, m_grhss = grhss })) = -- tracePm "desugarMatch" (vcat [ppr pats, ppr pats', ppr grhss']) return PmMatch { pm_pats = pats', pm_grhss = grhss' } +-- See Note [Suppress warnings in PMC desugaring] desugarGRHSs :: SrcSpan -> SDoc -> GRHSs GhcTc (LHsExpr GhcTc) -> DsM (PmGRHSs Pre) -desugarGRHSs match_loc pp_pats grhss = do +desugarGRHSs match_loc pp_pats grhss = discardWarningsDs $ do lcls <- desugarLocalBinds (grhssLocalBinds grhss) grhss' <- traverse (desugarLGRHS match_loc pp_pats) (grhssGRHSs grhss) return PmGRHSs { pgs_lcls = lcls, pgs_grhss = grhss' } @@ -593,6 +596,17 @@ The place to store the 'PmLet' guards for @where@ clauses (which are per 'GRHSs') is as a field of 'PmGRHSs'. For plain @let@ guards as in the guards of @x@, we can simply add them to the 'pg_grds' field of 'PmGRHS'. +Note [Suppress warnings in PMC desugaring] +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +This module uses 'dsLExpr', 'dsExpr', and 'dsSyntaxExpr' to desugar +expressions into Core for pattern match checking. The main desugaring +pass in GHC.HsToCore processes these same expressions too, so without +suppression any warnings would be emitted twice (#25996). + +To avoid this, the exported functions ('desugarPatBind', 'desugarMatches', +'desugarGRHSs') are wrapped in 'discardWarningsDs', covering all internal +desugarer calls without having to wrap each one individually. + Note [Desugaring -XStrict matches in Pmc] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Consider (#21761) ===================================== testsuite/tests/deSugar/should_compile/T25996.hs ===================================== @@ -0,0 +1,17 @@ +{-# OPTIONS_GHC -Wall #-} +{-# OPTIONS_GHC -Wno-unused-local-binds #-} +{-# OPTIONS_GHC -Wno-unused-top-binds #-} + +main :: IO () +main = do + pure () + where + biz :: IO () + biz = do + pure (10 :: Integer) + pure () + +biz' :: IO () +biz' = do + pure (10 :: Integer) + pure () ===================================== testsuite/tests/deSugar/should_compile/T25996.stderr ===================================== @@ -0,0 +1,10 @@ +T25996.hs:11:7: warning: [GHC-81995] [-Wunused-do-bind (in -Wall)] + A do-notation statement discarded a result of type ‘Integer’ + Suggested fix: + Suppress this warning by saying ‘_ <- pure (10 :: Integer)’ + +T25996.hs:16:3: warning: [GHC-81995] [-Wunused-do-bind (in -Wall)] + A do-notation statement discarded a result of type ‘Integer’ + Suggested fix: + Suppress this warning by saying ‘_ <- pure (10 :: Integer)’ + ===================================== testsuite/tests/deSugar/should_compile/all.T ===================================== @@ -115,3 +115,4 @@ test('T19883', normal, compile, ['']) test('T22719', normal, compile, ['-ddump-simpl -dsuppress-uniques -dno-typeable-binds']) test('T23550', normal, compile, ['']) test('T24489', normal, compile, ['-O']) +test('T25996', normal, compile, ['']) View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/d419e972dec4275afca69e7949d2f38… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/d419e972dec4275afca69e7949d2f38… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/int-index/epa-parens] 53 commits: Bump default language edition to GHC2024
by Vladislav Zavialov (＠int-index) 14 Apr '26

14 Apr '26

Vladislav Zavialov pushed to branch wip/int-index/epa-parens at Glasgow Haskell Compiler / GHC Commits: 7fbb4fcb by Rodrigo Mesquita at 2026-04-01T12:16:33+00:00 Bump default language edition to GHC2024 As per the accepted ghc-proposal#632 Fixes #26039 - - - - - 5ae43275 by Peng Fan at 2026-04-01T19:01:06-04:00 NCG/LA64: add cmpxchg and xchg primops And append some new instructions for LA664 uarch. Apply fix to cmpxchg-prim by Andreas Klebinger. Suggestions in https://gitlab.haskell.org/ghc/ghc/-/merge_requests/15515 - - - - - 8f95534a by Duncan Coutts at 2026-04-01T19:01:52-04:00 Remove signal-based ticker implementations Fixes issue #27073 All supported platforms should work with the pthreads + nanosleep based ticker implementation. This avoids all the problems with using signals. In practice, all supported platforms were probably using the non-signal tickers already, which is probably why we do not get lots of reports about deadlocks and other weirdness: we were definately using functions that are not async signal safe in the tick handler (such as fflush to flussh the eventlog). Only Solaris was explicitly using the timer_create ticker impl, and even Solaris could probably use the pthreads one (if anyone cared: Solaris is no longer a Teir 3 supported platform). Plausibly the only supported platform that this will change will be AIX, which should now use the pthreads impl. - - - - - 51b32b0d by Duncan Coutts at 2026-04-01T19:01:52-04:00 Tidy up some timer/ticker comments elsewhere - - - - - 7562bcd7 by Duncan Coutts at 2026-04-01T19:01:52-04:00 Remove now-unused install_vtalrm_handler Support function used by both of the signal-based ticker implementations. - - - - - 6da127c7 by Duncan Coutts at 2026-04-01T19:01:52-04:00 No longer probe for timer_create in rts/configure It was only used by the TimerCreate.c ticker impl. - - - - - 3fd490fa by Duncan Coutts at 2026-04-01T19:01:53-04:00 Note that rtsTimerSignal is deprecated. - - - - - 63099b0f by Simon Jakobi at 2026-04-01T19:02:39-04:00 Add perf test for #13960 Closes #13960. - - - - - 58009c14 by Apoorv Ingle at 2026-04-02T09:51:24+01:00 Streamline expansions using HsExpansion (#25001) Notes added [Error Context Stack] [Typechecking by expansion: overview] Notes updated Note [Expanding HsDo with XXExprGhcRn] [tcApp: typechecking applications] ------------------------- Metric Decrease: T9020 ------------------------- There are 2 key changes: 1. `HsExpand` datatype mediates between expansions 2. Replace `ErrCtxtM` to a simpler `HsCtxt` that does not depend on a `TidyEnv` This has some consequences detailed below: 1. `HsExpand` datatype mediates between expansions * Simplifies the implementations of `tcExpr` to work on `XExpr` * Removes `VACtxt` (and its associated `VAExpansion` and `VACall`) datatype, it is subsumed by simply a `SrcSpan`. * Removes the function `addHeadCtxt` as it is now mearly setting a location * The function `tcValArgs` does its own argument number management * move `splitHsTypes` out of `tcApp` * Removes special case of tcBody from `tcLambdaMatches` * Removes special case of `dsExpr` for `ExpandedThingTc` * Renames `tcMonoExpr` -> `tcMonoLExpr`, `tcMonoExprNC` -> `tcMonoLExpr` * Renames `EValArg`, `EValArgQL` fields: `ea_ctxt` -> `ea_loc_span` and `eaql_ctx` -> `eaql_loc_span` * Remove `PopErrCtxt` from `XXExprGhcRn` * `fun_orig` in tcInstFun depends on the SrcSpan of the head of the application chain (similar to addArgCtxt) - it references the application chain head if it is user located, or uses the error context stack as a fallback if it's a generated location * Make a new variant `GeneratedSrcSpan` in `SrcSpan` for HIEAst Nodes - Expressions wrapped around `GeneratedSrcSpan` are ignored and never added to the error context stack - In Explicit list expansion `fromListN` is wrapped with a `GeneratedSrcSpan` with `GeneratedSrcSpanDetails` field to store the original srcspan 2. Replace `ErrCtxtM` to a simpler `HsCtxt` that does not depend on a `TidyEnv` * Merge `HsThingRn` to `HsCtxt` * Landmark Error messages are now just computed on the fly * Make HsExpandedRn and HsExpandedTc payload a located HsExpr GhcRn * `HsCtxt` are tidied and zonked at the end right before printing Co-authored-by: simonpj <simon.peytonjones(a)gmail.com> - - - - - bc4b4487 by Zubin Duggal at 2026-04-03T14:22:27-04:00 driver: recognise .dyn_o as a valid object file to link if passed on the command line. This allows plugins compiled with this suffix to run. Fixes #24486 - - - - - 5ebb9121 by Simon Jakobi at 2026-04-03T14:23:11-04:00 Add regression test for #16145 Closes #16145. - - - - - c1fc1c44 by Simon Peyton Jones at 2026-04-03T19:56:07-04:00 Refactor eta-expansion in Prep The Prep pass does eta-expansion but I found cases where it was doing bad things. So I refactored and simplified it quite a bit. In the new design * There is no distinction between `rhs` and `body`; in particular, lambdas can now appear anywhere, rather than just as the RHS of a let-binding. * This change led to a significant simplification of Prep, and a more straightforward explanation of eta-expansion. See the new Note [Eta expansion] * The consequences is that CoreToStg needs to handle naked lambdas. This is very easy; but it does need a unique supply, which forces some simple refactoring. Having a unique supply to hand is probably a good thing anyway. - - - - - 21beda2c by Simon Peyton Jones at 2026-04-03T19:56:07-04:00 Clarify Note [Interesting dictionary arguments] Ticket #26831 ended up concluding that the code for GHC.Core.Opt.Specialise.interestingDict was good, but the commments were a bit inadequate. This commit improves the comments slightly. - - - - - 3eaac1f2 by Simon Peyton Jones at 2026-04-03T19:56:07-04:00 Make inlining a bit more eager for overloaded functions If we have f d = ... (class-op d x y) ... we should be eager to inline `f`, because that may change the higher order call (class-op d x y) into a call to a statically known function. See the discussion on #26831. Even though this does a bit /more/ inlining, compile times decrease by an average of 0.4%. Compile time changes: DsIncompleteRecSel3(normal) 431,786,104 -2.2% ManyAlternatives(normal) 670,883,768 -1.6% ManyConstructors(normal) 3,758,493,832 -2.6% GOOD MultilineStringsPerf(normal) 29,900,576 -2.8% T14052Type(ghci) 1,047,600,848 -1.2% T17836(normal) 392,852,328 -5.2% T18478(normal) 442,785,768 -1.4% T21839c(normal) 341,536,992 -14.1% GOOD T3064(normal) 174,086,152 +5.3% BAD T5631(normal) 506,867,800 +1.0% hard_hole_fits(normal) 209,530,736 -1.3% info_table_map_perf(normal) 19,523,093,184 -1.2% parsing001(normal) 377,810,528 -1.1% pmcOrPats(normal) 60,075,264 -0.5% geo. mean -0.4% minimum -14.1% maximum +5.3% Runtime changes haddock.Cabal(normal) 27,351,988,792 -0.7% haddock.base(normal) 26,997,212,560 -0.6% haddock.compiler(normal) 219,531,332,960 -1.0% Metric Decrease: LinkableUsage01 ManyConstructors T17949 T21839c T13035 TcPlugin_RewritePerf hard_hole_fits Metric Increase: T3064 - - - - - 5cbc2c82 by Matthew Pickering at 2026-04-03T19:57:02-04:00 bytecode: Add magic header/version to bytecode files In order to avoid confusing errors when using stale interface files (ie from an older compiler version), we add a simple header/version check like the one for interface files. Fixes #27068 - - - - - d95a1936 by fendor at 2026-04-03T19:57:02-04:00 Add constants for bytecode in-memory buffer size Introduce a common constant for the default size of the .gbc and .bytecodelib binary buffer. The buffer is by default set to 1 MB. - - - - - b822c30a by mangoiv at 2026-04-03T19:57:49-04:00 testsuite: filter stderr for static001 on darwin This reactivates the test on x86_64 darwin as this should have been done long ago and ignores warnings emitted by ranlib on newer version of the darwin toolchain since they are benign. (no symbols for stub libraries) Fixes #27116 - - - - - 28ce1f8a by Andreas Klebinger at 2026-04-03T19:58:44-04:00 Give the Data instance for ModuleName a non-bottom toConstr implementation. I've also taken the liberty to add Note [Data.Data instances for GHC AST Types] describing some of the uses of Data.Data I could find. Fixes #27129 - - - - - 8ca41ffe by mangoiv at 2026-04-03T19:59:30-04:00 issue template: fix add bug label - - - - - 3981db0c by Sylvain Henry at 2026-04-03T20:00:33-04:00 Add more canned GC functions for common register patterns (#27142) Based on analysis of heap-check sites across the GHC compiler and Cabal, the following patterns were not covered by existing canned GC functions but occurred frequently enough to warrant specialisation: stg_gc_ppppp -- 5 GC pointers stg_gc_ip -- unboxed word + GC pointer stg_gc_pi -- GC pointer + unboxed word stg_gc_ii -- two unboxed words stg_gc_bpp -- byte (I8) + two GC pointers Adding these reduces the fraction of heap-check sites falling back to the generic GC path from ~1.4% to ~0.4% when compiling GHC itself. Co-Authored-By: Claude Sonnet 4.6 <noreply(a)anthropic.com> - - - - - d17d1435 by Matthew Pickering at 2026-04-03T20:01:19-04:00 Make home unit dependencies stored as sets Co-authored-by: Wolfgang Jeltsch <wolfgang(a)well-typed.com> - - - - - 92a97015 by Simon Peyton Jones at 2026-04-05T00:58:57+01:00 Add Invariant (NoTypeShadowing) to Core This commit addresses #26868, by adding a new invariant (NoTypeShadowing) to Core. See Note [No type-shadowing in Core] in GHC.Core - - - - - 8b5a5020 by Simon Peyton Jones at 2026-04-05T00:58:57+01:00 Major refactor of free-variable functions For some time we have had two free-variable mechanims for types: * The "FV" mechanism, embodied in GHC.Utils.FV, which worked OK, but was fragile where eta-expansion was concerned. * The TyCoFolder mechanism, using a one-shot EndoOS accumulator I finally got tired of this and refactored the whole thing, thereby addressing #27080. Now we have * `GHC.Types.Var.FV`, which has a composable free-variable result type, very much in the spirit of the old `FV`, but much more robust. (It uses the "one shot trick".) * GHC.Core.TyCo.FVs now has just one technology for free variables. All this led to a lot of renaming. There are couple of error-message changes. The change in T18451 makes an already-poor error message even more mysterious. But it really needs a separate look. We also now traverse the AST in a different order leading to a different but still deterministic order for FVs and test output has been adjusted accordingly. - - - - - 4bf040c6 by sheaf at 2026-04-05T14:56:29-04:00 Add utility pprTrace_ function This function is useful for quick debugging, as it can be added to a where clause to pretty-print debugging information: fooBar x y | cond = body1 | otherwise = body2 where !_ = pprTrace_ "fooBar" $ vcat [ text "x:" <+> ppr x , text "y:" <+> ppr y , text "cond:" <+> ppr cond ] - - - - - 502e6ffe by Andrew Lelechenko at 2026-04-07T04:47:21-04:00 base: improve error message for Data.Char.chr As per https://github.com/haskell/core-libraries-committee/issues/384 - - - - - b21bd52e by Simon Peyton Jones at 2026-04-07T04:48:07-04:00 Refactor FunResCtxt a bit Fixes #27154 - - - - - 7fe84ea5 by Zubin Duggal at 2026-04-07T19:11:52+05:30 compiler: Warn when -finfo-table-map is used with -fllvm These are currently not supported together. Fixes #26435 - - - - - 4a45a7da by Matthew Pickering at 2026-04-08T04:37:29-04:00 packaging: correctly propagate build/host/target to bindist configure script At the moment the host and target which we will produce a compiler for is fixed at the initial configure time. Therefore we need to persist the choice made at this time into the installation bindist as well so we look for the right tools, with the right prefixes at install time. In the future, we want to provide a bit more control about what kind of bindist we produce so the logic about what the host/target will have to be written by hadrian rather than persisted by the configure script. In particular with cross compilers we want to either build a normal stage 2 cross bindist or a stage 3 bindist, which creates a bindist which has a native compiler for the target platform. Fixes #21970 Co-authored-by: Sven Tennie <sven.tennie(a)gmail.com> - - - - - b0950df6 by Sven Tennie at 2026-04-08T04:37:29-04:00 Cross --host and --target no longer required for cross (#21970) We set sane defaults in the configure script. Thus, these paramenters aren't required any longer. - - - - - fef35216 by Sven Tennie at 2026-04-08T04:37:30-04:00 ci: Define USER_CONF_CC_OPTS_STAGE2 for aarch64/mingw ghc-toolchain doesn't see $CONF_CC_OPTS_STAGE2 when the bindist gets configured. So, the hack to override the compiler gets lost. - - - - - 8dd6f453 by Cheng Shao at 2026-04-08T04:38:11-04:00 ghci: use ShortByteString for LookupSymbol/LookupSymbolInDLL/LookupClosure messages This patch refactors ghci to use `ShortByteString` for `LookupSymbol`/`LookupSymbolInDLL`/`LookupClosure` messages as the first part of #27147. Co-authored-by: Codex <codex(a)openai.com> - - - - - 371ef200 by Cheng Shao at 2026-04-08T04:38:11-04:00 ghci: use ShortByteString for MkCostCentres message This patch refactors ghci to use `ShortByteString` for `MkCostCentres` messages as a first part of #27147. This also considerably lowers the memory overhead of breakpoints when cost center profiling is enabled. ------------------------- Metric Decrease: interpreter_steplocal ------------------------- Co-authored-by: Codex <codex(a)openai.com> - - - - - 4a122bb6 by Phil Hazelden at 2026-04-08T20:49:42-04:00 Implement modifiers syntax. The `%m` syntax of linear types is now accepted in more places, to allow use by future extensions, though so far linear types is still the only consumer. This may break existing code where it * Uses -XLinearTypes. * Has code of the form `a %m -> b`, where `m` can't be inferred to be kind Multiplicity. The code can be fixed either by adding a kind annotation, or by setting `-XLinearTypes -XNoModifiers`. Proposal: https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0370-m… - - - - - 07267f79 by Zubin Duggal at 2026-04-08T20:50:25-04:00 hadrian: Don't include the package hash in the haddock directory Since GHC 9.8 and hash_unit_ids, haddock urls have looked like`ghc-9.10.3/doc/html/libraries/base-4.20.2.0-39f9/**/*.html` The inclusion of the hash makes it hard for downstream non-boot packages to properly link to these files, as the hash is not part of a standard cabal substitution. Since we only build one version of each package, we don't need the hash to disambiguate anything, we can just remove it. Fixes #26635 - - - - - 0a83b95b by ARATA Mizuki at 2026-04-08T20:51:18-04:00 testsuite: Allow multiple ways to be run by setting multiple command-line options This patch allows multiple `--test-way`s to take effect, like: $ hadrian/build test --test-way=normal --test-way=llvm Previously, only one way was run if the test speed was 'normal' or 'fast'. Closes #26926 Co-authored-by: sheaf <sam.derbyshire(a)gmail.com> - - - - - e841931c by Teo Camarasu at 2026-04-08T20:52:00-04:00 doc: improve eventlog-flush-interval flag documentation We mention the performance cost and how this flag can be turned off. Resolves #27056 - - - - - e332db25 by Teo Camarasu at 2026-04-08T20:52:01-04:00 docs/user_guide: fix typo - - - - - 5b82080a by Simon Jakobi at 2026-04-08T20:52:44-04:00 Fix -dsuppress-uniques for free variables in demand signatures Before: Str=b{sXyZ->S} With this patch: Str=b{S} T13143.stderr is updated accordingly. Fixes #27106. - - - - - b7a084cc by Simon Jakobi at 2026-04-08T20:53:27-04:00 Documentation fixes for demand signature notation Fixes #27115. - - - - - 59391132 by Simon Jakobi at 2026-04-08T20:54:08-04:00 Use upsert for non-deleting map updates Some compiler functions were using `alter`, despite never removing any entries: they only update an existing entry or insert a new one. These functions are converted to using `upsert`: alter :: (Maybe a -> Maybe a) -> Key -> Map a -> Map a upsert :: (Maybe a -> a) -> Key -> Map a -> Map a `upsert` variants are also added to APIs of the various Word64Map wrapper types. The precedent for this `upsert` operation is in the containers library: see https://github.com/haskell/containers/pull/1145 Metrics: compile_time/bytes allocated ------------------------------------- geo. mean: -0.1% minimum: -0.5% maximum: +0.0% Resolves #27140. - - - - - da7e82f4 by Cheng Shao at 2026-04-08T20:54:49-04:00 testsuite: fix testsuite run for +ipe again This patch makes the +ipe flavour transformer pass the entire testsuite again by dropping stdout/stderr checks of certain tests that are sensitive to stack layout changes with `+ipe`. Related: #26799. - - - - - 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> - - - - - fbc131b6 by Vladislav Zavialov at 2026-04-13T22:15:04+03:00 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. - - - - - 644 changed files: - .gitlab-ci.yml - .gitlab/ci.sh - .gitlab/generate-ci/gen_ci.hs - .gitlab/issue_templates/default.md - .gitlab/issue_templates/release_tracking.md - .gitlab/jobs.yaml - .gitlab/merge_request_templates/Default.md - + changelog.d/changelog-entries - + changelog.d/config - compiler/GHC.hs - compiler/GHC/Builtin/PrimOps.hs - compiler/GHC/ByteCode/Breakpoints.hs - compiler/GHC/ByteCode/InfoTable.hs - compiler/GHC/ByteCode/Serialize.hs - compiler/GHC/Cmm/CommonBlockElim.hs - compiler/GHC/Cmm/Dataflow/Graph.hs - compiler/GHC/Cmm/Dataflow/Label.hs - compiler/GHC/Cmm/LayoutStack.hs - compiler/GHC/Cmm/Utils.hs - compiler/GHC/CmmToAsm/CFG.hs - compiler/GHC/CmmToAsm/LA64/CodeGen.hs - compiler/GHC/CmmToAsm/LA64/Instr.hs - compiler/GHC/CmmToAsm/LA64/Ppr.hs - compiler/GHC/Core.hs - compiler/GHC/Core/Coercion.hs - compiler/GHC/Core/FVs.hs - compiler/GHC/Core/Lint.hs - compiler/GHC/Core/Multiplicity.hs - compiler/GHC/Core/Opt/Arity.hs - compiler/GHC/Core/Opt/DmdAnal.hs - compiler/GHC/Core/Opt/SetLevels.hs - compiler/GHC/Core/Opt/Simplify/Iteration.hs - compiler/GHC/Core/Opt/Specialise.hs - compiler/GHC/Core/RoughMap.hs - compiler/GHC/Core/Rules.hs - compiler/GHC/Core/Subst.hs - compiler/GHC/Core/Tidy.hs - compiler/GHC/Core/TyCo/FVs.hs - compiler/GHC/Core/TyCo/Ppr.hs - compiler/GHC/Core/TyCo/Rep.hs - compiler/GHC/Core/TyCo/Subst.hs - compiler/GHC/Core/TyCon/Env.hs - 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compiler/GHC/Unit/Finder.hs - compiler/GHC/Unit/Home/Graph.hs - compiler/GHC/Unit/State.hs - + compiler/GHC/Unit/State.hs-boot - compiler/GHC/Utils/Binary.hs - compiler/GHC/Utils/EndoOS.hs - − compiler/GHC/Utils/FV.hs - compiler/GHC/Utils/Logger.hs - compiler/GHC/Utils/Trace.hs - compiler/GHC/Wasm/ControlFlow/FromCmm.hs - compiler/Language/Haskell/Syntax/Binds.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/Module/Name.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/exts/control.rst - docs/users_guide/exts/linear_types.rst - + docs/users_guide/exts/modifiers.rst - docs/users_guide/exts/syntax.rst - docs/users_guide/ghc_config.py.in - − docs/users_guide/ghc_packages.py - docs/users_guide/release-notes.rst - docs/users_guide/runtime_control.rst - docs/users_guide/using-optimisation.rst - docs/users_guide/using-warnings.rst - ghc/GHCi/UI.hs - ghc/GHCi/UI/Info.hs - ghc/ghc-bin.cabal.in - hadrian/bindist/Makefile - hadrian/cfg/system.config.in - hadrian/hadrian.cabal - hadrian/src/CommandLine.hs - hadrian/src/Context.hs - hadrian/src/Main.hs - hadrian/src/Oracles/Setting.hs - hadrian/src/Packages.hs - + hadrian/src/Rules/Changelog.hs - hadrian/src/Rules/Documentation.hs - hadrian/src/Rules/Generate.hs - hadrian/src/Rules/Test.hs - hadrian/src/Settings/Builders/Cabal.hs - hadrian/src/Settings/Default.hs - libraries/array - libraries/base/base.cabal.in - libraries/base/changelog.md - libraries/base/tests/enum01.stdout - libraries/base/tests/enum01.stdout-alpha-dec-osf3 - libraries/base/tests/enum01.stdout-ws-64 - 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− m4/fp_check_timer_create.m4 - m4/fp_setup_project_version.m4 - m4/fptools_ghc_version.m4 - m4/fptools_set_platform_vars.m4 - m4/ghc_toolchain.m4 - rts/HeapStackCheck.cmm - rts/RtsSymbols.c - rts/Timer.c - rts/configure.ac - rts/include/rts/Timer.h - rts/include/stg/MiscClosures.h - rts/include/stg/SMP.h - rts/posix/Signals.c - rts/posix/Signals.h - rts/posix/Ticker.c - − rts/posix/ticker/Setitimer.c - − rts/posix/ticker/TimerCreate.c - testsuite/driver/testlib.py - testsuite/mk/boilerplate.mk - testsuite/tests/ado/ado004.hs - testsuite/tests/annotations/should_fail/annfail02.hs - testsuite/tests/annotations/should_fail/annfail02.stderr - testsuite/tests/arityanal/should_compile/Arity01.stderr - testsuite/tests/arityanal/should_compile/Arity05.stderr - testsuite/tests/arityanal/should_compile/Arity08.stderr - testsuite/tests/arityanal/should_compile/Arity11.stderr - testsuite/tests/arityanal/should_compile/Arity14.stderr - testsuite/tests/array/should_run/arr020.hs - testsuite/tests/core-to-stg/T19700.hs - 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utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Decl.hs - utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Utils.hs - utils/haddock/haddock-api/src/Haddock/Convert.hs - utils/haddock/haddock-api/src/Haddock/GhcUtils.hs - utils/haddock/haddock-api/src/Haddock/Interface/Create.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/src/LinearTypes.hs - utils/haddock/latex-test/src/LinearTypes/LinearTypes.hs - utils/hsc2hs - utils/jsffi/dyld.mjs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/ef641c0749cadb3badf2cb87ee9d76… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/ef641c0749cadb3badf2cb87ee9d76… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/int-index/namespace-specifier] 32 commits: Add Invariant (NoTypeShadowing) to Core
by Vladislav Zavialov (＠int-index) 14 Apr '26

14 Apr '26

Vladislav Zavialov pushed to branch wip/int-index/namespace-specifier at Glasgow Haskell Compiler / GHC Commits: 92a97015 by Simon Peyton Jones at 2026-04-05T00:58:57+01:00 Add Invariant (NoTypeShadowing) to Core This commit addresses #26868, by adding a new invariant (NoTypeShadowing) to Core. See Note [No type-shadowing in Core] in GHC.Core - - - - - 8b5a5020 by Simon Peyton Jones at 2026-04-05T00:58:57+01:00 Major refactor of free-variable functions For some time we have had two free-variable mechanims for types: * The "FV" mechanism, embodied in GHC.Utils.FV, which worked OK, but was fragile where eta-expansion was concerned. * The TyCoFolder mechanism, using a one-shot EndoOS accumulator I finally got tired of this and refactored the whole thing, thereby addressing #27080. Now we have * `GHC.Types.Var.FV`, which has a composable free-variable result type, very much in the spirit of the old `FV`, but much more robust. (It uses the "one shot trick".) * GHC.Core.TyCo.FVs now has just one technology for free variables. All this led to a lot of renaming. There are couple of error-message changes. The change in T18451 makes an already-poor error message even more mysterious. But it really needs a separate look. We also now traverse the AST in a different order leading to a different but still deterministic order for FVs and test output has been adjusted accordingly. - - - - - 4bf040c6 by sheaf at 2026-04-05T14:56:29-04:00 Add utility pprTrace_ function This function is useful for quick debugging, as it can be added to a where clause to pretty-print debugging information: fooBar x y | cond = body1 | otherwise = body2 where !_ = pprTrace_ "fooBar" $ vcat [ text "x:" <+> ppr x , text "y:" <+> ppr y , text "cond:" <+> ppr cond ] - - - - - 502e6ffe by Andrew Lelechenko at 2026-04-07T04:47:21-04:00 base: improve error message for Data.Char.chr As per https://github.com/haskell/core-libraries-committee/issues/384 - - - - - b21bd52e by Simon Peyton Jones at 2026-04-07T04:48:07-04:00 Refactor FunResCtxt a bit Fixes #27154 - - - - - 7fe84ea5 by Zubin Duggal at 2026-04-07T19:11:52+05:30 compiler: Warn when -finfo-table-map is used with -fllvm These are currently not supported together. Fixes #26435 - - - - - 4a45a7da by Matthew Pickering at 2026-04-08T04:37:29-04:00 packaging: correctly propagate build/host/target to bindist configure script At the moment the host and target which we will produce a compiler for is fixed at the initial configure time. Therefore we need to persist the choice made at this time into the installation bindist as well so we look for the right tools, with the right prefixes at install time. In the future, we want to provide a bit more control about what kind of bindist we produce so the logic about what the host/target will have to be written by hadrian rather than persisted by the configure script. In particular with cross compilers we want to either build a normal stage 2 cross bindist or a stage 3 bindist, which creates a bindist which has a native compiler for the target platform. Fixes #21970 Co-authored-by: Sven Tennie <sven.tennie(a)gmail.com> - - - - - b0950df6 by Sven Tennie at 2026-04-08T04:37:29-04:00 Cross --host and --target no longer required for cross (#21970) We set sane defaults in the configure script. Thus, these paramenters aren't required any longer. - - - - - fef35216 by Sven Tennie at 2026-04-08T04:37:30-04:00 ci: Define USER_CONF_CC_OPTS_STAGE2 for aarch64/mingw ghc-toolchain doesn't see $CONF_CC_OPTS_STAGE2 when the bindist gets configured. So, the hack to override the compiler gets lost. - - - - - 8dd6f453 by Cheng Shao at 2026-04-08T04:38:11-04:00 ghci: use ShortByteString for LookupSymbol/LookupSymbolInDLL/LookupClosure messages This patch refactors ghci to use `ShortByteString` for `LookupSymbol`/`LookupSymbolInDLL`/`LookupClosure` messages as the first part of #27147. Co-authored-by: Codex <codex(a)openai.com> - - - - - 371ef200 by Cheng Shao at 2026-04-08T04:38:11-04:00 ghci: use ShortByteString for MkCostCentres message This patch refactors ghci to use `ShortByteString` for `MkCostCentres` messages as a first part of #27147. This also considerably lowers the memory overhead of breakpoints when cost center profiling is enabled. ------------------------- Metric Decrease: interpreter_steplocal ------------------------- Co-authored-by: Codex <codex(a)openai.com> - - - - - 4a122bb6 by Phil Hazelden at 2026-04-08T20:49:42-04:00 Implement modifiers syntax. The `%m` syntax of linear types is now accepted in more places, to allow use by future extensions, though so far linear types is still the only consumer. This may break existing code where it * Uses -XLinearTypes. * Has code of the form `a %m -> b`, where `m` can't be inferred to be kind Multiplicity. The code can be fixed either by adding a kind annotation, or by setting `-XLinearTypes -XNoModifiers`. Proposal: https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0370-m… - - - - - 07267f79 by Zubin Duggal at 2026-04-08T20:50:25-04:00 hadrian: Don't include the package hash in the haddock directory Since GHC 9.8 and hash_unit_ids, haddock urls have looked like`ghc-9.10.3/doc/html/libraries/base-4.20.2.0-39f9/**/*.html` The inclusion of the hash makes it hard for downstream non-boot packages to properly link to these files, as the hash is not part of a standard cabal substitution. Since we only build one version of each package, we don't need the hash to disambiguate anything, we can just remove it. Fixes #26635 - - - - - 0a83b95b by ARATA Mizuki at 2026-04-08T20:51:18-04:00 testsuite: Allow multiple ways to be run by setting multiple command-line options This patch allows multiple `--test-way`s to take effect, like: $ hadrian/build test --test-way=normal --test-way=llvm Previously, only one way was run if the test speed was 'normal' or 'fast'. Closes #26926 Co-authored-by: sheaf <sam.derbyshire(a)gmail.com> - - - - - e841931c by Teo Camarasu at 2026-04-08T20:52:00-04:00 doc: improve eventlog-flush-interval flag documentation We mention the performance cost and how this flag can be turned off. Resolves #27056 - - - - - e332db25 by Teo Camarasu at 2026-04-08T20:52:01-04:00 docs/user_guide: fix typo - - - - - 5b82080a by Simon Jakobi at 2026-04-08T20:52:44-04:00 Fix -dsuppress-uniques for free variables in demand signatures Before: Str=b{sXyZ->S} With this patch: Str=b{S} T13143.stderr is updated accordingly. Fixes #27106. - - - - - b7a084cc by Simon Jakobi at 2026-04-08T20:53:27-04:00 Documentation fixes for demand signature notation Fixes #27115. - - - - - 59391132 by Simon Jakobi at 2026-04-08T20:54:08-04:00 Use upsert for non-deleting map updates Some compiler functions were using `alter`, despite never removing any entries: they only update an existing entry or insert a new one. These functions are converted to using `upsert`: alter :: (Maybe a -> Maybe a) -> Key -> Map a -> Map a upsert :: (Maybe a -> a) -> Key -> Map a -> Map a `upsert` variants are also added to APIs of the various Word64Map wrapper types. The precedent for this `upsert` operation is in the containers library: see https://github.com/haskell/containers/pull/1145 Metrics: compile_time/bytes allocated ------------------------------------- geo. mean: -0.1% minimum: -0.5% maximum: +0.0% Resolves #27140. - - - - - da7e82f4 by Cheng Shao at 2026-04-08T20:54:49-04:00 testsuite: fix testsuite run for +ipe again This patch makes the +ipe flavour transformer pass the entire testsuite again by dropping stdout/stderr checks of certain tests that are sensitive to stack layout changes with `+ipe`. Related: #26799. - - - - - 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> - - - - - c20fe745 by Vladislav Zavialov at 2026-04-13T22:10:14+03:00 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. - - - - - 400 changed files: - .gitlab-ci.yml - .gitlab/ci.sh - .gitlab/generate-ci/gen_ci.hs - .gitlab/issue_templates/release_tracking.md - .gitlab/jobs.yaml - .gitlab/merge_request_templates/Default.md - + changelog.d/changelog-entries - + changelog.d/config - compiler/GHC/ByteCode/Breakpoints.hs - compiler/GHC/ByteCode/InfoTable.hs - compiler/GHC/Cmm/CommonBlockElim.hs - compiler/GHC/Cmm/Dataflow/Graph.hs - compiler/GHC/Cmm/Dataflow/Label.hs - compiler/GHC/Cmm/LayoutStack.hs - compiler/GHC/Cmm/Utils.hs - compiler/GHC/CmmToAsm/CFG.hs - compiler/GHC/Core.hs - compiler/GHC/Core/Coercion.hs - compiler/GHC/Core/FVs.hs - compiler/GHC/Core/Lint.hs - compiler/GHC/Core/Multiplicity.hs - compiler/GHC/Core/Opt/DmdAnal.hs - compiler/GHC/Core/Opt/SetLevels.hs - compiler/GHC/Core/Opt/Simplify/Iteration.hs - compiler/GHC/Core/Opt/Specialise.hs - compiler/GHC/Core/RoughMap.hs - compiler/GHC/Core/Rules.hs - compiler/GHC/Core/Subst.hs - compiler/GHC/Core/TyCo/FVs.hs - compiler/GHC/Core/TyCo/Ppr.hs - compiler/GHC/Core/TyCo/Rep.hs - compiler/GHC/Core/TyCo/Subst.hs - compiler/GHC/Core/TyCon/Env.hs - compiler/GHC/Core/Type.hs - compiler/GHC/Core/Unify.hs - compiler/GHC/Data/FastString/Env.hs - compiler/GHC/Data/Word64Map/Internal.hs - compiler/GHC/Data/Word64Map/Lazy.hs - compiler/GHC/Data/Word64Map/Strict.hs - compiler/GHC/Data/Word64Map/Strict/Internal.hs - compiler/GHC/Driver/Flags.hs - compiler/GHC/Driver/Plugins.hs - compiler/GHC/Driver/Session.hs - compiler/GHC/Hs/Basic.hs - compiler/GHC/Hs/Binds.hs - compiler/GHC/Hs/Decls.hs - compiler/GHC/Hs/Expr.hs - compiler/GHC/Hs/ImpExp.hs - compiler/GHC/Hs/Instances.hs - compiler/GHC/Hs/Pat.hs - compiler/GHC/Hs/Syn/Type.hs - compiler/GHC/Hs/Type.hs - compiler/GHC/Hs/Utils.hs - compiler/GHC/HsToCore/Binds.hs - compiler/GHC/HsToCore/Breakpoints.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/Match.hs - compiler/GHC/HsToCore/Pmc/Desugar.hs - compiler/GHC/HsToCore/Quote.hs - compiler/GHC/HsToCore/Ticks.hs - compiler/GHC/Iface/Ext/Ast.hs - compiler/GHC/Iface/Syntax.hs - compiler/GHC/Iface/Type.hs - compiler/GHC/Linker/Loader.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/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 - 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testsuite/tests/simplCore/should_compile/spec-inline.stderr - testsuite/tests/typecheck/no_skolem_info/T20063.stderr - testsuite/tests/typecheck/no_skolem_info/T20232.hs - testsuite/tests/typecheck/no_skolem_info/T20232.stderr - testsuite/tests/typecheck/should_compile/T25180.stderr - testsuite/tests/typecheck/should_compile/free_monad_hole_fits.stderr - testsuite/tests/typecheck/should_fail/T10971d.stderr - testsuite/tests/typecheck/should_fail/T12589.stderr - testsuite/tests/typecheck/should_fail/T13311.stderr - testsuite/tests/typecheck/should_fail/T17773.stderr - testsuite/tests/typecheck/should_fail/T2846b.stderr - testsuite/tests/typecheck/should_fail/T7851.stderr - testsuite/tests/typecheck/should_fail/T8603.stderr - + 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/check-exact/Transform.hs - utils/haddock/haddock-api/haddock-api.cabal - 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/Create.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/src/LinearTypes.hs - utils/haddock/latex-test/src/LinearTypes/LinearTypes.hs - utils/hsc2hs - utils/jsffi/dyld.mjs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/72097d908d0fd66df5a87df8ed4ec9… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/72097d908d0fd66df5a87df8ed4ec9… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/ani/T27160
by Apoorv Ingle (＠ani) 14 Apr '26

14 Apr '26

Apoorv Ingle pushed new branch wip/ani/T27160 at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/ani/T27160 You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/27162/hadrian-linkhs-response-file] Use response files for hadrian linking with ghc (support long command lines)
by David Eichmann (＠DavidEichmann) 14 Apr '26

14 Apr '26

David Eichmann pushed to branch wip/27162/hadrian-linkhs-response-file at Glasgow Haskell Compiler / GHC Commits: f72a7252 by Duncan Coutts at 2026-04-13T18:05:43+01:00 Use response files for hadrian linking with ghc (support long command lines) In future supoort 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> - - - - - 3 changed files: - hadrian/src/Builder.hs - hadrian/src/Hadrian/Builder.hs - hadrian/src/Settings/Builders/Ghc.hs Changes: ===================================== hadrian/src/Builder.hs ===================================== @@ -345,11 +345,7 @@ instance H.Builder Builder where Haddock BuildPackage -> runHaddock path buildArgs buildInputs - Ghc FindHsDependencies _ -> do - -- Use a response file for ghc -M invocations, to - -- avoid issues with command line size limit on - -- Windows (#26637) - runGhcWithResponse path buildArgs buildInputs + Ghc _ _ -> runGhcWithResponse path buildArgs buildInputs buildOptions HsCpp -> captureStdout @@ -393,16 +389,18 @@ runHaddock haddockPath flagArgs fileInputs = withTempFile $ \tmp -> do writeFile' tmp $ escapeArgs fileInputs cmd [haddockPath] flagArgs ('@' : tmp) -runGhcWithResponse :: FilePath -> [String] -> [FilePath] -> Action () -runGhcWithResponse ghcPath flagArgs fileInputs = withTempFile $ \tmp -> do - - writeFile' tmp $ escapeArgs fileInputs - - -- We can't put the flags in a response file, because some flags - -- require empty arguments (such as the -dep-suffix flag), but - -- that isn't supported yet due to #26560. - cmd [ghcPath] flagArgs ('@' : tmp) - +-- | Use a response file for ghc invocations to avoid issues with command line +-- size limit on Windows (#26637). +runGhcWithResponse :: FilePath -- ^ Path to ghc + -> [String] -- ^ Arguments passed on the command line + -> [FilePath] -- ^ Input file paths (passed via response file) + -> [CmdOption] + -> Action () +runGhcWithResponse ghcPath buildArgs buildInputs buildOptions = withTempFile $ \tmp -> do + let tmpContents = escapeArgs buildInputs + putVerbose $ "Build Inputs (" <> tmp <> "): " <> show buildInputs + writeFile' tmp tmpContents + cmd [ghcPath] buildArgs ('@' : tmp) buildOptions -- TODO: Some builders are required only on certain platforms. For example, -- 'Objdump' is only required on OpenBSD and AIX. Add support for platform ===================================== hadrian/src/Hadrian/Builder.hs ===================================== @@ -29,7 +29,9 @@ import Hadrian.Utilities -- | This data structure captures all information relevant to invoking a builder. data BuildInfo = BuildInfo { - -- | Command line arguments. + -- | Command line arguments. Some builders (e.g. Ar, Ghc, Haddock) omit + -- buildInputs from buildArgs so that buildInputs can be passed separately + -- using a response file. buildArgs :: [String], -- | Input files. buildInputs :: [FilePath], ===================================== hadrian/src/Settings/Builders/Ghc.hs ===================================== @@ -62,7 +62,6 @@ compileAndLinkHs = (builder (Ghc CompileHs) ||^ builder (Ghc LinkHs)) ? do [ arg "-fwrite-ide-info" , arg "-hiedir", arg hie_path ] - , getInputs , arg "-o", arg =<< getOutput ] compileC :: Args @@ -78,7 +77,6 @@ compileC = builder (Ghc CompileCWithGhc) ? do , mconcat (map (map ("-optc" ++) <$>) ccArgs) , defaultGhcWarningsArgs , arg "-c" - , getInputs , arg "-o" , arg =<< getOutput ] @@ -95,7 +93,6 @@ compileCxx = builder (Ghc CompileCppWithGhc) ? do , mconcat (map (map ("-optcxx" ++) <$>) ccArgs) , defaultGhcWarningsArgs , arg "-c" - , getInputs , arg "-o" , arg =<< getOutput ] View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/f72a72522c87164a608627ad2111176… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/f72a72522c87164a608627ad2111176… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/27162/hadrian-linkhs-response-file] Use response files for hadrian linking with ghc (support long command lines)
by David Eichmann (＠DavidEichmann) 14 Apr '26

14 Apr '26

David Eichmann pushed to branch wip/27162/hadrian-linkhs-response-file at Glasgow Haskell Compiler / GHC Commits: 99e73b95 by Duncan Coutts at 2026-04-13T18:00:51+01:00 Use response files for hadrian linking with ghc (support long command lines) In future supoort 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> - - - - - 3 changed files: - hadrian/src/Builder.hs - hadrian/src/Hadrian/Builder.hs - hadrian/src/Settings/Builders/Ghc.hs Changes: ===================================== hadrian/src/Builder.hs ===================================== @@ -345,11 +345,7 @@ instance H.Builder Builder where Haddock BuildPackage -> runHaddock path buildArgs buildInputs - Ghc FindHsDependencies _ -> do - -- Use a response file for ghc -M invocations, to - -- avoid issues with command line size limit on - -- Windows (#26637) - runGhcWithResponse path buildArgs buildInputs + Ghc _ _ -> runGhcWithResponse path buildArgs buildInputs buildOptions HsCpp -> captureStdout @@ -393,16 +389,18 @@ runHaddock haddockPath flagArgs fileInputs = withTempFile $ \tmp -> do writeFile' tmp $ escapeArgs fileInputs cmd [haddockPath] flagArgs ('@' : tmp) -runGhcWithResponse :: FilePath -> [String] -> [FilePath] -> Action () -runGhcWithResponse ghcPath flagArgs fileInputs = withTempFile $ \tmp -> do - - writeFile' tmp $ escapeArgs fileInputs - - -- We can't put the flags in a response file, because some flags - -- require empty arguments (such as the -dep-suffix flag), but - -- that isn't supported yet due to #26560. - cmd [ghcPath] flagArgs ('@' : tmp) - +-- | Use a response file for ghc invocations to avoid issues with command line +-- size limit on Windows (#26637). +runGhcWithResponse :: FilePath -- ^ Path to ghc + -> [String] -- ^ Arguments passed on the command line + -> [FilePath] -- ^ Input file paths (passed via response file) + -> [CmdOption] + -> Action () +runGhcWithResponse ghcPath buildArgs buildInputs buildOptions = withTempFile $ \tmp -> do + let tmpContents = escapeArgs buildInputs + putVerbose $ "Build Inputs (" <> tmp <> "): " <> show buildInputs + writeFile' tmp tmpContents + cmd [ghcPath] buildArgs ('@' : tmp) buildOptions -- TODO: Some builders are required only on certain platforms. For example, -- 'Objdump' is only required on OpenBSD and AIX. Add support for platform ===================================== hadrian/src/Hadrian/Builder.hs ===================================== @@ -29,7 +29,9 @@ import Hadrian.Utilities -- | This data structure captures all information relevant to invoking a builder. data BuildInfo = BuildInfo { - -- | Command line arguments. + -- | Command line arguments. Some builders (e.g. Ar, Ghc, Haddock) ommit + -- buildInputs from buildArgs so that buildInputs can be passed separately + -- using a response file. buildArgs :: [String], -- | Input files. buildInputs :: [FilePath], ===================================== hadrian/src/Settings/Builders/Ghc.hs ===================================== @@ -62,7 +62,6 @@ compileAndLinkHs = (builder (Ghc CompileHs) ||^ builder (Ghc LinkHs)) ? do [ arg "-fwrite-ide-info" , arg "-hiedir", arg hie_path ] - , getInputs , arg "-o", arg =<< getOutput ] compileC :: Args @@ -78,7 +77,6 @@ compileC = builder (Ghc CompileCWithGhc) ? do , mconcat (map (map ("-optc" ++) <$>) ccArgs) , defaultGhcWarningsArgs , arg "-c" - , getInputs , arg "-o" , arg =<< getOutput ] @@ -95,7 +93,6 @@ compileCxx = builder (Ghc CompileCppWithGhc) ? do , mconcat (map (map ("-optcxx" ++) <$>) ccArgs) , defaultGhcWarningsArgs , arg "-c" - , getInputs , arg "-o" , arg =<< getOutput ] View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/99e73b95cb7b77b2ffccf35391048a3… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/99e73b95cb7b77b2ffccf35391048a3… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/27162/hadrian-linkhs-response-file] Use response files for hadrian linking with ghc (support long command lines)
by David Eichmann (＠DavidEichmann) 14 Apr '26

14 Apr '26

David Eichmann pushed to branch wip/27162/hadrian-linkhs-response-file at Glasgow Haskell Compiler / GHC Commits: c439d0d8 by Duncan Coutts at 2026-04-13T17:47:40+01:00 Use response files for hadrian linking with ghc (support long command lines) In future supoort 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> - - - - - 2 changed files: - hadrian/src/Builder.hs - hadrian/src/Settings/Builders/Ghc.hs Changes: ===================================== hadrian/src/Builder.hs ===================================== @@ -345,11 +345,8 @@ instance H.Builder Builder where Haddock BuildPackage -> runHaddock path buildArgs buildInputs - Ghc FindHsDependencies _ -> do - -- Use a response file for ghc -M invocations, to - -- avoid issues with command line size limit on - -- Windows (#26637) - runGhcWithResponse path buildArgs buildInputs + + Ghc _ _ -> runGhcWithResponse path buildArgs buildInputs buildOptions HsCpp -> captureStdout @@ -393,16 +390,18 @@ runHaddock haddockPath flagArgs fileInputs = withTempFile $ \tmp -> do writeFile' tmp $ escapeArgs fileInputs cmd [haddockPath] flagArgs ('@' : tmp) -runGhcWithResponse :: FilePath -> [String] -> [FilePath] -> Action () -runGhcWithResponse ghcPath flagArgs fileInputs = withTempFile $ \tmp -> do - - writeFile' tmp $ escapeArgs fileInputs - - -- We can't put the flags in a response file, because some flags - -- require empty arguments (such as the -dep-suffix flag), but - -- that isn't supported yet due to #26560. - cmd [ghcPath] flagArgs ('@' : tmp) - +-- | Use a response file for ghc invocations to avoid issues with command line +-- size limit on Windows (#26637). +runGhcWithResponse :: FilePath -- ^ Path to ghc + -> [String] -- ^ Arguments passed on the command line + -> [FilePath] -- ^ Input file paths (passed via response file) + -> [CmdOption] + -> Action () +runGhcWithResponse ghcPath buildArgs buildInputs buildOptions = withTempFile $ \tmp -> do + let tmpContents = escapeArgs buildInputs + putVerbose $ "Build Inputs (" <> tmp <> "): " <> show buildInputs + writeFile' tmp tmpContents + cmd [ghcPath] buildArgs ('@' : tmp) buildOptions -- TODO: Some builders are required only on certain platforms. For example, -- 'Objdump' is only required on OpenBSD and AIX. Add support for platform ===================================== hadrian/src/Settings/Builders/Ghc.hs ===================================== @@ -62,7 +62,6 @@ compileAndLinkHs = (builder (Ghc CompileHs) ||^ builder (Ghc LinkHs)) ? do [ arg "-fwrite-ide-info" , arg "-hiedir", arg hie_path ] - , getInputs , arg "-o", arg =<< getOutput ] compileC :: Args @@ -78,7 +77,6 @@ compileC = builder (Ghc CompileCWithGhc) ? do , mconcat (map (map ("-optc" ++) <$>) ccArgs) , defaultGhcWarningsArgs , arg "-c" - , getInputs , arg "-o" , arg =<< getOutput ] @@ -95,7 +93,6 @@ compileCxx = builder (Ghc CompileCppWithGhc) ? do , mconcat (map (map ("-optcxx" ++) <$>) ccArgs) , defaultGhcWarningsArgs , arg "-c" - , getInputs , arg "-o" , arg =<< getOutput ] View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/c439d0d8de047277cc75c6917d95984… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/c439d0d8de047277cc75c6917d95984… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/spj-reinstallable-base2
by Simon Peyton Jones (＠simonpj) 14 Apr '26

14 Apr '26

Simon Peyton Jones pushed new branch wip/spj-reinstallable-base2 at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/spj-reinstallable-base2 You're receiving this email because of your account on gitlab.haskell.org.

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