[Git][ghc/ghc][wip/T26160] 11 commits: template-haskell: improve changelog
by Ben Gamari (＠bgamari) 01 Jul '25
by Ben Gamari (＠bgamari) 01 Jul '25
01 Jul '25
Ben Gamari pushed to branch wip/T26160 at Glasgow Haskell Compiler / GHC
Commits:
4b748a99 by Teo Camarasu at 2025-06-24T15:31:07-04:00
template-haskell: improve changelog
stable -> more stable, just to clarify that this interface isn't fully stable.
errornously -> mistakenly: I typod this and also let's go for a simpler word
- - - - -
e358e477 by Sylvain Henry at 2025-06-24T15:31:58-04:00
Bump stack resolver to use GHC 9.6.7
Cf #26139
- - - - -
4bf5eb63 by fendor at 2025-06-25T17:05:43-04:00
Teach `:reload` about multiple home units
`:reload` needs to lookup the `ModuleName` and must not assume the given
`ModuleName` is in the current `HomeUnit`.
We add a new utility function which allows us to find a `HomeUnitModule`
instead of a `Module`.
Further, we introduce the `GhciCommandError` type which can be used to
abort the execution of a GHCi command.
This error is caught and printed in a human readable fashion.
- - - - -
b3d97bb3 by fendor at 2025-06-25T17:06:25-04:00
Implement `-fno-load-initial-targets` flag
We add the new flag `-fno-load-initial-targets` which doesn't load all `Target`s
immediately but only computes the module graph for all `Target`s.
The user can then decide to load modules from that module graph using
the syntax:
ghci> :reload <Mod>
This will load everything in the module graph up to `Mod`.
The user can return to the initial state by using the builtin target
`none` to unload all modules.
ghci> :reload none
Is in principle identical to starting a new session with the
`-fno-load-initial-targets` flag.
The `-fno-load-initial-targets` flag allows for faster startup time of GHCi when a
user has lots of `Target`s.
We additionally extend the `:reload` command to accept multiple
`ModuleName`s. For example:
ghci> :reload <Mod1> <Mod2>
Loads all modules up to the modules `Mod1` and `Mod2`.
- - - - -
49f44e52 by Teo Camarasu at 2025-06-26T04:19:51-04:00
Expose ghc-internal unit id through the settings file
This in combination with the unit id of the compiler library allows
cabal to know of the two unit ids that should not be reinstalled (in
specific circumstances) as:
- when using plugins, we want to link against exactly the compiler unit
id
- when using TemplateHaskell we want to link against exactly the package
that contains the TemplateHaskell interfaces, which is `ghc-internal`
See: <https://github.com/haskell/cabal/issues/10087>
Resolves #25282
- - - - -
499c4efe by Bryan Richter at 2025-06-26T04:20:33-04:00
CI: Fix and clean up capture of timings
* Fixes the typo that caused 'cat ci-timings' to report "no such file or
directory"
* Gave ci_timings.txt a file extension so it may play better with other
systems
* Fixed the use of time_it so all times are recorded
* Fixed time_it to print name along with timing
- - - - -
86c90c9e by Bryan Richter at 2025-06-26T04:20:33-04:00
CI: Update collapsible section usage
The syntax apparently changed at some point.
- - - - -
04308ee4 by Bryan Richter at 2025-06-26T04:20:33-04:00
CI: Add more collapsible sections
- - - - -
43b606bb by Florian Ragwitz at 2025-06-27T16:31:26-04:00
Tick uses of wildcard/pun field binds as if using the record selector function
Fixes #17834.
See Note [Record-selector ticks] for additional reasoning behind this as well
as an overview of the implementation details and future improvements.
- - - - -
d4952549 by Ben Gamari at 2025-06-27T16:32:08-04:00
testsuite/caller-cc: Make CallerCc[123] less sensitive
These were previously sensitive to irrelevant changes in program
structure. To avoid this we filter out all by lines emitted by the
-fcaller-cc from the profile.
- - - - -
69cc65a7 by Ben Gamari at 2025-07-01T11:00:47-04:00
gitlab-ci: Pass -q by default
Reduces verbosity, making it more likely that the log size will fall
under GitLab's truncation limit.
Addresses #26160.
- - - - -
59 changed files:
- .gitlab-ci.yml
- .gitlab/ci.sh
- .gitlab/common.sh
- .gitlab/generate-ci/gen_ci.hs
- .gitlab/jobs.yaml
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/HsToCore/Ticks.hs
- compiler/GHC/Unit/Module/Graph.hs
- compiler/Setup.hs
- docs/users_guide/9.14.1-notes.rst
- docs/users_guide/ghci.rst
- ghc/GHCi/UI.hs
- ghc/GHCi/UI/Exception.hs
- ghc/GHCi/UI/Print.hs
- hadrian/src/Rules/Generate.hs
- hadrian/stack.yaml
- hadrian/stack.yaml.lock
- libraries/template-haskell/changelog.md
- testsuite/tests/ghc-e/should_fail/T18441fail5.stderr
- testsuite/tests/ghci/prog-mhu003/prog-mhu003.stderr
- testsuite/tests/ghci/prog-mhu004/prog-mhu004a.stderr
- + testsuite/tests/ghci/prog-mhu005/Makefile
- + testsuite/tests/ghci/prog-mhu005/a/A.hs
- + testsuite/tests/ghci/prog-mhu005/all.T
- + testsuite/tests/ghci/prog-mhu005/b/B.hs
- + testsuite/tests/ghci/prog-mhu005/prog-mhu005a.script
- + testsuite/tests/ghci/prog-mhu005/prog-mhu005a.stderr
- + testsuite/tests/ghci/prog-mhu005/prog-mhu005a.stdout
- + testsuite/tests/ghci/prog-mhu005/unitA
- + testsuite/tests/ghci/prog-mhu005/unitB
- + testsuite/tests/ghci/prog021/A.hs
- + testsuite/tests/ghci/prog021/B.hs
- + testsuite/tests/ghci/prog021/Makefile
- + testsuite/tests/ghci/prog021/all.T
- + testsuite/tests/ghci/prog021/prog021a.script
- + testsuite/tests/ghci/prog021/prog021a.stderr
- + testsuite/tests/ghci/prog021/prog021a.stdout
- + testsuite/tests/ghci/prog021/prog021b.script
- + testsuite/tests/ghci/prog021/prog021b.stderr
- + testsuite/tests/ghci/prog021/prog021b.stdout
- + testsuite/tests/ghci/prog022/A.hs
- + testsuite/tests/ghci/prog022/B.hs
- + testsuite/tests/ghci/prog022/Makefile
- + testsuite/tests/ghci/prog022/all.T
- + testsuite/tests/ghci/prog022/ghci.prog022a.script
- + testsuite/tests/ghci/prog022/ghci.prog022a.stderr
- + testsuite/tests/ghci/prog022/ghci.prog022a.stdout
- + testsuite/tests/ghci/prog022/ghci.prog022b.script
- + testsuite/tests/ghci/prog022/ghci.prog022b.stderr
- + testsuite/tests/ghci/prog022/ghci.prog022b.stdout
- testsuite/tests/ghci/scripts/ghci021.stderr
- + testsuite/tests/hpc/recsel/Makefile
- + testsuite/tests/hpc/recsel/recsel.hs
- + testsuite/tests/hpc/recsel/recsel.stdout
- + testsuite/tests/hpc/recsel/test.T
- testsuite/tests/profiling/should_run/caller-cc/all.T
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Ben Gamari pushed new branch wip/T26160 at Glasgow Haskell Compiler / GHC
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[Git][ghc/ghc][wip/romes/26039] Bump default language edition to GHC2024
by Rodrigo Mesquita (＠alt-romes) 01 Jul '25
by Rodrigo Mesquita (＠alt-romes) 01 Jul '25
01 Jul '25
Rodrigo Mesquita pushed to branch wip/romes/26039 at Glasgow Haskell Compiler / GHC
Commits:
95efe8b3 by Rodrigo Mesquita at 2025-07-01T15:27:56+01:00
Bump default language edition to GHC2024
As per the accepted ghc-proposal#632
Fixes #26039
- - - - -
85 changed files:
- compiler/GHC/Driver/Flags.hs
- testsuite/tests/ado/ado004.hs
- testsuite/tests/annotations/should_fail/annfail02.hs
- testsuite/tests/array/should_run/arr020.hs
- testsuite/tests/core-to-stg/T19700.hs
- testsuite/tests/deSugar/should_fail/DsStrictFail.hs
- testsuite/tests/deriving/should_compile/T15798b.hs
- testsuite/tests/deriving/should_compile/T15798c.hs
- testsuite/tests/deriving/should_compile/T24955a.hs
- testsuite/tests/deriving/should_compile/T24955b.hs
- testsuite/tests/deriving/should_compile/T24955c.hs
- testsuite/tests/deriving/should_fail/T10598_fail4.hs
- testsuite/tests/deriving/should_fail/T10598_fail5.hs
- testsuite/tests/dmdanal/sigs/T22241.hs
- testsuite/tests/gadt/T20485.hs
- testsuite/tests/ghci.debugger/scripts/all.T
- testsuite/tests/ghci.debugger/scripts/break012.hs
- testsuite/tests/ghci/prog-mhu002/all.T
- testsuite/tests/ghci/scripts/Makefile
- testsuite/tests/ghci/should_run/all.T
- testsuite/tests/indexed-types/should_compile/T15322.hs
- testsuite/tests/linear/should_fail/T18888.hs
- testsuite/tests/module/T20007.hs
- testsuite/tests/module/mod90.hs
- testsuite/tests/overloadedrecflds/should_fail/NoFieldSelectorsFail.hs
- testsuite/tests/overloadedrecflds/should_fail/T18999_NoDisambiguateRecordFields.hs
- testsuite/tests/overloadedrecflds/should_fail/all.T
- testsuite/tests/parser/should_fail/ParserNoLambdaCase.hs
- testsuite/tests/parser/should_fail/T16270h.hs
- testsuite/tests/parser/should_fail/readFail001.hs
- testsuite/tests/partial-sigs/should_compile/SomethingShowable.hs
- testsuite/tests/polykinds/T7151.hs
- testsuite/tests/polykinds/T7433.hs
- testsuite/tests/programs/andy_cherry/test.T
- testsuite/tests/rename/should_fail/T10668.hs
- testsuite/tests/rename/should_fail/T12681.hs
- testsuite/tests/rename/should_fail/T13568.hs
- testsuite/tests/rename/should_fail/T13644.hs
- testsuite/tests/rename/should_fail/T13847.hs
- testsuite/tests/rename/should_fail/T14032c.hs
- testsuite/tests/rename/should_fail/T19843l.hs
- testsuite/tests/rename/should_fail/T5385.hs
- testsuite/tests/roles/should_fail/Roles5.hs
- testsuite/tests/showIface/DocsInHiFile.hs
- testsuite/tests/showIface/DocsInHiFile1.stdout
- testsuite/tests/showIface/DocsInHiFileTH.hs
- testsuite/tests/showIface/DocsInHiFileTH.stdout
- testsuite/tests/showIface/DocsInHiFileTHExternal.hs
- testsuite/tests/showIface/HaddockIssue849.hs
- testsuite/tests/showIface/HaddockIssue849.stdout
- testsuite/tests/showIface/HaddockOpts.hs
- testsuite/tests/showIface/HaddockOpts.stdout
- testsuite/tests/showIface/HaddockSpanIssueT24378.hs
- testsuite/tests/showIface/HaddockSpanIssueT24378.stdout
- testsuite/tests/showIface/MagicHashInHaddocks.hs
- testsuite/tests/showIface/MagicHashInHaddocks.stdout
- testsuite/tests/showIface/Makefile
- testsuite/tests/showIface/NoExportList.hs
- testsuite/tests/showIface/NoExportList.stdout
- testsuite/tests/showIface/PragmaDocs.stdout
- testsuite/tests/showIface/ReExports.stdout
- testsuite/tests/simplCore/T9646/test.T
- testsuite/tests/simplCore/should_compile/T21960.hs
- testsuite/tests/th/TH_Promoted1Tuple.hs
- testsuite/tests/th/TH_Roles1.hs
- testsuite/tests/typecheck/should_compile/MutRec.hs
- testsuite/tests/typecheck/should_compile/T10770a.hs
- testsuite/tests/typecheck/should_compile/T11339.hs
- testsuite/tests/typecheck/should_compile/T11397.hs
- testsuite/tests/typecheck/should_compile/T13526.hs
- testsuite/tests/typecheck/should_compile/T18467.hs
- testsuite/tests/typecheck/should_compile/tc081.hs
- testsuite/tests/typecheck/should_compile/tc141.hs
- testsuite/tests/typecheck/should_fail/T23427.hs
- testsuite/tests/typecheck/should_fail/T6078.hs
- testsuite/tests/typecheck/should_fail/T7453.hs
- testsuite/tests/typecheck/should_fail/T8570.hs
- testsuite/tests/typecheck/should_fail/tcfail083.hs
- testsuite/tests/typecheck/should_fail/tcfail084.hs
- testsuite/tests/typecheck/should_fail/tcfail094.hs
- testsuite/tests/typecheck/should_run/T1735.hs
- testsuite/tests/typecheck/should_run/T3731.hs
- testsuite/tests/vdq-rta/should_fail/T24159_type_syntax_th_fail.script
- testsuite/tests/warnings/should_fail/CaretDiagnostics1.hs
- testsuite/tests/warnings/should_fail/T24396c.hs
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[Git][ghc/ghc][wip/wasm-ffi-docs] 2 commits: users-guide: Reference Wasm FFI section
by Ben Gamari (＠bgamari) 01 Jul '25
by Ben Gamari (＠bgamari) 01 Jul '25
01 Jul '25
Ben Gamari pushed to branch wip/wasm-ffi-docs at Glasgow Haskell Compiler / GHC
Commits:
cf1b1d9c by Ben Gamari at 2025-07-01T09:42:43-04:00
users-guide: Reference Wasm FFI section
- - - - -
80caffff by Ben Gamari at 2025-07-01T09:42:49-04:00
users-guide: Fix too-short heading warning
- - - - -
2 changed files:
- docs/users_guide/exts/doandifthenelse.rst
- docs/users_guide/exts/ffi.rst
Changes:
=====================================
docs/users_guide/exts/doandifthenelse.rst
=====================================
@@ -1,7 +1,7 @@
.. _doandifthenelse:
Do And If Then Else
-============
+===================
.. extension:: DoAndIfThenElse
:shortdesc: Allow semicolons in ``if`` expressions.
=====================================
docs/users_guide/exts/ffi.rst
=====================================
@@ -31,6 +31,8 @@ features should be avoided where possible.
The FFI libraries are documented in the accompanying library
documentation; see for example the :base-ref:`Foreign.` module.
+For documentation on FFI with WebAssembly, see the
+:ref:`WebAssembly chapter <wasm-jsffi>`.
GHC differences to the FFI Chapter
----------------------------------
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/eb8590bf8a91666eaf1ab4d5338e11…
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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 4 commits: Tick uses of wildcard/pun field binds as if using the record selector function
by Marge Bot (＠marge-bot) 01 Jul '25
by Marge Bot (＠marge-bot) 01 Jul '25
01 Jul '25
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
43b606bb by Florian Ragwitz at 2025-06-27T16:31:26-04:00
Tick uses of wildcard/pun field binds as if using the record selector function
Fixes #17834.
See Note [Record-selector ticks] for additional reasoning behind this as well
as an overview of the implementation details and future improvements.
- - - - -
d4952549 by Ben Gamari at 2025-06-27T16:32:08-04:00
testsuite/caller-cc: Make CallerCc[123] less sensitive
These were previously sensitive to irrelevant changes in program
structure. To avoid this we filter out all by lines emitted by the
-fcaller-cc from the profile.
- - - - -
8d2d8ffb by Berk Özkütük at 2025-07-01T09:23:58-04:00
Consider `PromotedDataCon` in `tyConStupidTheta`
Haddock checks data declarations for the stupid theta so as not to
pretty-print them as empty contexts. Type data declarations end up as
`PromotedDataCon`s by the time Haddock performs this check, causing a
panic. This commit extends `tyConStupidTheta` so that it returns an
empty list for `PromotedDataCon`s. This decision was guided by the fact
that type data declarations never have data type contexts (see (R1) in
Note [Type data declarations]).
Fixes #25739.
- - - - -
fe959cd4 by Rodrigo Mesquita at 2025-07-01T09:23:59-04:00
hadrian: Fallback logic for internal interpreter
When determining whether to build the internal interpreter, the `make`
build system had a fallback case for platforms not in the list of
explicitly-supported operating systems and architectures.
This fallback says we should try to build the internal interpreter if
building dynamic GHC programs (if the architecture is unknown).
Fixes #24098
- - - - -
15 changed files:
- compiler/GHC/Core/TyCon.hs
- compiler/GHC/HsToCore/Ticks.hs
- docs/users_guide/9.14.1-notes.rst
- hadrian/src/Oracles/Flag.hs
- hadrian/src/Rules/Generate.hs
- hadrian/src/Settings/Builders/Cabal.hs
- hadrian/src/Settings/Packages.hs
- hadrian/src/Settings/Program.hs
- + testsuite/tests/hpc/recsel/Makefile
- + testsuite/tests/hpc/recsel/recsel.hs
- + testsuite/tests/hpc/recsel/recsel.stdout
- + testsuite/tests/hpc/recsel/test.T
- testsuite/tests/profiling/should_run/caller-cc/all.T
- + utils/haddock/html-test/ref/Bug25739.html
- + utils/haddock/html-test/src/Bug25739.hs
Changes:
=====================================
compiler/GHC/Core/TyCon.hs
=====================================
@@ -2709,6 +2709,7 @@ tyConStupidTheta :: TyCon -> [PredType]
tyConStupidTheta tc@(TyCon { tyConDetails = details })
| AlgTyCon {algTcStupidTheta = stupid} <- details = stupid
| PrimTyCon {} <- details = []
+ | PromotedDataCon {} <- details = []
| otherwise = pprPanic "tyConStupidTheta" (ppr tc)
-- | Extract the 'TyVar's bound by a vanilla type synonym
=====================================
compiler/GHC/HsToCore/Ticks.hs
=====================================
@@ -1,12 +1,11 @@
-{-# LANGUAGE DeriveFunctor #-}
{-# LANGUAGE NondecreasingIndentation #-}
-{-# LANGUAGE TypeFamilies #-}
{-# OPTIONS_GHC -Wno-incomplete-record-updates #-}
{-
(c) Galois, 2006
(c) University of Glasgow, 2007
+(c) Florian Ragwitz, 2025
-}
module GHC.HsToCore.Ticks
@@ -38,7 +37,9 @@ import GHC.Utils.Logger
import GHC.Types.SrcLoc
import GHC.Types.Basic
import GHC.Types.Id
+import GHC.Types.Id.Info
import GHC.Types.Var.Set
+import GHC.Types.Var.Env
import GHC.Types.Name.Set hiding (FreeVars)
import GHC.Types.Name
import GHC.Types.CostCentre
@@ -48,6 +49,7 @@ import GHC.Types.ProfAuto
import Control.Monad
import Data.List (isSuffixOf, intersperse)
+import Data.Foldable (toList)
import Trace.Hpc.Mix
@@ -123,6 +125,7 @@ addTicksToBinds logger cfg
, density = mkDensity tickish $ ticks_profAuto cfg
, this_mod = mod
, tickishType = tickish
+ , recSelBinds = emptyVarEnv
}
(binds',_,st') = unTM (addTickLHsBinds binds) env st
in (binds', st')
@@ -224,8 +227,7 @@ addTickLHsBind :: LHsBind GhcTc -> TM (LHsBind GhcTc)
addTickLHsBind (L pos (XHsBindsLR bind@(AbsBinds { abs_binds = binds
, abs_exports = abs_exports
}))) =
- withEnv add_exports $
- withEnv add_inlines $ do
+ withEnv (add_rec_sels . add_inlines . add_exports) $ do
binds' <- addTickLHsBinds binds
return $ L pos $ XHsBindsLR $ bind { abs_binds = binds' }
where
@@ -247,6 +249,12 @@ addTickLHsBind (L pos (XHsBindsLR bind@(AbsBinds { abs_binds = binds
| ABE{ abe_poly = pid, abe_mono = mid } <- abs_exports
, isInlinePragma (idInlinePragma pid) ] }
+ add_rec_sels env =
+ env{ recSelBinds = recSelBinds env `extendVarEnvList`
+ [ (abe_mono, abe_poly)
+ | ABE{ abe_poly, abe_mono } <- abs_exports
+ , RecSelId{} <- [idDetails abe_poly] ] }
+
addTickLHsBind (L pos (funBind@(FunBind { fun_id = L _ id, fun_matches = matches }))) = do
let name = getOccString id
decl_path <- getPathEntry
@@ -261,6 +269,10 @@ addTickLHsBind (L pos (funBind@(FunBind { fun_id = L _ id, fun_matches = matches
tickish <- tickishType `liftM` getEnv
case tickish of { ProfNotes | inline -> return (L pos funBind); _ -> do
+ -- See Note [Record-selector ticks]
+ selTick <- recSelTick id
+ case selTick of { Just tick -> tick_rec_sel tick; _ -> do
+
(fvs, mg) <-
getFreeVars $
addPathEntry name $
@@ -288,7 +300,40 @@ addTickLHsBind (L pos (funBind@(FunBind { fun_id = L _ id, fun_matches = matches
let mbCons = maybe Prelude.id (:)
return $ L pos $ funBind { fun_matches = mg
, fun_ext = second (tick `mbCons`) (fun_ext funBind) }
- }
+ } }
+ where
+ -- See Note [Record-selector ticks]
+ tick_rec_sel tick =
+ pure $ L pos $ funBind { fun_ext = second (tick :) (fun_ext funBind) }
+
+
+-- Note [Record-selector ticks]
+-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+-- Users expect (see #17834) that accessing a record field by its name using
+-- NamedFieldPuns or RecordWildCards will mark it as covered. This is very
+-- reasonable, because otherwise the use of those two language features will
+-- produce unnecessary noise in coverage reports, distracting from real
+-- coverage problems.
+--
+-- Because of that, GHC chooses to treat record selectors specially for
+-- coverage purposes to improve the developer experience.
+--
+-- This is done by keeping track of which 'Id's are effectively bound to
+-- record fields (using NamedFieldPuns or RecordWildCards) in 'TickTransEnv's
+-- 'recSelBinds', and making 'HsVar's corresponding to those fields tick the
+-- appropriate box when executed.
+--
+-- To enable that, we also treat 'FunBind's for record selector functions
+-- specially. We only create a TopLevelBox for the record selector function,
+-- skipping the ExpBox that'd normally be created. This simplifies the re-use
+-- of ticks for the same record selector, and is done by not recursing into
+-- the fun_matches match group for record selector functions.
+--
+-- This scheme could be extended further in the future, making coverage for
+-- constructor fields (named or even positional) mean that the field was
+-- accessed at run-time. For the time being, we only cover NamedFieldPuns and
+-- RecordWildCards binds to cover most practical use-cases while keeping it
+-- simple.
-- TODO: Revisit this
addTickLHsBind (L pos (pat@(PatBind { pat_lhs = lhs
@@ -471,7 +516,10 @@ addBinTickLHsExpr boxLabel e@(L pos e0)
-- in the addTickLHsExpr family of functions.)
addTickHsExpr :: HsExpr GhcTc -> TM (HsExpr GhcTc)
-addTickHsExpr e@(HsVar _ (L _ id)) = do freeVar id; return e
+-- See Note [Record-selector ticks]
+addTickHsExpr e@(HsVar _ (L _ id)) =
+ freeVar id >> recSelTick id >>= pure . maybe e wrap
+ where wrap tick = XExpr . HsTick tick . noLocA $ e
addTickHsExpr e@(HsIPVar {}) = return e
addTickHsExpr e@(HsOverLit {}) = return e
addTickHsExpr e@(HsOverLabel{}) = return e
@@ -532,7 +580,7 @@ addTickHsExpr (HsMultiIf ty alts)
; alts' <- mapM (traverse $ addTickGRHS isOneOfMany False False) alts
; return $ HsMultiIf ty alts' }
addTickHsExpr (HsLet x binds e) =
- bindLocals (collectLocalBinders CollNoDictBinders binds) $ do
+ bindLocals binds $ do
binds' <- addTickHsLocalBinds binds -- to think about: !patterns.
e' <- addTickLHsExprLetBody e
return (HsLet x binds' e')
@@ -580,6 +628,7 @@ addTickHsExpr e@(HsUntypedSplice{}) = return e
addTickHsExpr e@(HsGetField {}) = return e
addTickHsExpr e@(HsProjection {}) = return e
addTickHsExpr (HsProc x pat cmdtop) =
+ bindLocals pat $
liftM2 (HsProc x)
(addTickLPat pat)
(traverse (addTickHsCmdTop) cmdtop)
@@ -646,19 +695,17 @@ addTickMatch :: Bool -> Bool -> Bool {-Is this Do Expansion-} -> Match GhcTc (L
-> TM (Match GhcTc (LHsExpr GhcTc))
addTickMatch isOneOfMany isLambda isDoExp match@(Match { m_pats = L _ pats
, m_grhss = gRHSs }) =
- bindLocals (collectPatsBinders CollNoDictBinders pats) $ do
+ bindLocals pats $ do
gRHSs' <- addTickGRHSs isOneOfMany isLambda isDoExp gRHSs
return $ match { m_grhss = gRHSs' }
addTickGRHSs :: Bool -> Bool -> Bool -> GRHSs GhcTc (LHsExpr GhcTc)
-> TM (GRHSs GhcTc (LHsExpr GhcTc))
addTickGRHSs isOneOfMany isLambda isDoExp (GRHSs x guarded local_binds) =
- bindLocals binders $ do
+ bindLocals local_binds $ do
local_binds' <- addTickHsLocalBinds local_binds
guarded' <- mapM (traverse (addTickGRHS isOneOfMany isLambda isDoExp)) guarded
return $ GRHSs x guarded' local_binds'
- where
- binders = collectLocalBinders CollNoDictBinders local_binds
addTickGRHS :: Bool -> Bool -> Bool -> GRHS GhcTc (LHsExpr GhcTc)
-> TM (GRHS GhcTc (LHsExpr GhcTc))
@@ -697,7 +744,7 @@ addTickLStmts isGuard stmts = do
addTickLStmts' :: (Maybe (Bool -> BoxLabel)) -> [ExprLStmt GhcTc] -> TM a
-> TM ([ExprLStmt GhcTc], a)
addTickLStmts' isGuard lstmts res
- = bindLocals (collectLStmtsBinders CollNoDictBinders lstmts) $
+ = bindLocals lstmts $
do { lstmts' <- mapM (traverse (addTickStmt isGuard)) lstmts
; a <- res
; return (lstmts', a) }
@@ -710,6 +757,7 @@ addTickStmt _isGuard (LastStmt x e noret ret) =
(pure noret)
(addTickSyntaxExpr hpcSrcSpan ret)
addTickStmt _isGuard (BindStmt xbs pat e) =
+ bindLocals pat $
liftM4 (\b f -> BindStmt $ XBindStmtTc
{ xbstc_bindOp = b
, xbstc_boundResultType = xbstc_boundResultType xbs
@@ -770,17 +818,19 @@ addTickApplicativeArg isGuard (op, arg) =
liftM2 (,) (addTickSyntaxExpr hpcSrcSpan op) (addTickArg arg)
where
addTickArg (ApplicativeArgOne m_fail pat expr isBody) =
- ApplicativeArgOne
- <$> mapM (addTickSyntaxExpr hpcSrcSpan) m_fail
- <*> addTickLPat pat
- <*> addTickLHsExpr expr
- <*> pure isBody
+ bindLocals pat $
+ ApplicativeArgOne
+ <$> mapM (addTickSyntaxExpr hpcSrcSpan) m_fail
+ <*> addTickLPat pat
+ <*> addTickLHsExpr expr
+ <*> pure isBody
addTickArg (ApplicativeArgMany x stmts ret pat ctxt) =
- (ApplicativeArgMany x)
- <$> addTickLStmts isGuard stmts
- <*> (unLoc <$> addTickLHsExpr (L (noAnnSrcSpan hpcSrcSpan) ret))
- <*> addTickLPat pat
- <*> pure ctxt
+ bindLocals pat $
+ ApplicativeArgMany x
+ <$> addTickLStmts isGuard stmts
+ <*> (unLoc <$> addTickLHsExpr (L (noAnnSrcSpan hpcSrcSpan) ret))
+ <*> addTickLPat pat
+ <*> pure ctxt
addTickStmtAndBinders :: Maybe (Bool -> BoxLabel) -> ParStmtBlock GhcTc GhcTc
-> TM (ParStmtBlock GhcTc GhcTc)
@@ -871,7 +921,7 @@ addTickHsCmd (HsCmdIf x cnd e1 c2 c3) =
(addTickLHsCmd c2)
(addTickLHsCmd c3)
addTickHsCmd (HsCmdLet x binds c) =
- bindLocals (collectLocalBinders CollNoDictBinders binds) $ do
+ bindLocals binds $ do
binds' <- addTickHsLocalBinds binds -- to think about: !patterns.
c' <- addTickLHsCmd c
return (HsCmdLet x binds' c')
@@ -907,18 +957,16 @@ addTickCmdMatchGroup mg@(MG { mg_alts = (L l matches) }) = do
addTickCmdMatch :: Match GhcTc (LHsCmd GhcTc) -> TM (Match GhcTc (LHsCmd GhcTc))
addTickCmdMatch match@(Match { m_pats = L _ pats, m_grhss = gRHSs }) =
- bindLocals (collectPatsBinders CollNoDictBinders pats) $ do
+ bindLocals pats $ do
gRHSs' <- addTickCmdGRHSs gRHSs
return $ match { m_grhss = gRHSs' }
addTickCmdGRHSs :: GRHSs GhcTc (LHsCmd GhcTc) -> TM (GRHSs GhcTc (LHsCmd GhcTc))
addTickCmdGRHSs (GRHSs x guarded local_binds) =
- bindLocals binders $ do
+ bindLocals local_binds $ do
local_binds' <- addTickHsLocalBinds local_binds
guarded' <- mapM (traverse addTickCmdGRHS) guarded
return $ GRHSs x guarded' local_binds'
- where
- binders = collectLocalBinders CollNoDictBinders local_binds
addTickCmdGRHS :: GRHS GhcTc (LHsCmd GhcTc) -> TM (GRHS GhcTc (LHsCmd GhcTc))
-- The *guards* are *not* Cmds, although the body is
@@ -937,15 +985,14 @@ addTickLCmdStmts stmts = do
addTickLCmdStmts' :: [LStmt GhcTc (LHsCmd GhcTc)] -> TM a
-> TM ([LStmt GhcTc (LHsCmd GhcTc)], a)
addTickLCmdStmts' lstmts res
- = bindLocals binders $ do
+ = bindLocals lstmts $ do
lstmts' <- mapM (traverse addTickCmdStmt) lstmts
a <- res
return (lstmts', a)
- where
- binders = collectLStmtsBinders CollNoDictBinders lstmts
addTickCmdStmt :: Stmt GhcTc (LHsCmd GhcTc) -> TM (Stmt GhcTc (LHsCmd GhcTc))
addTickCmdStmt (BindStmt x pat c) =
+ bindLocals pat $
liftM2 (BindStmt x)
(addTickLPat pat)
(addTickLHsCmd c)
@@ -1006,11 +1053,13 @@ addTickArithSeqInfo (FromThenTo e1 e2 e3) =
data TickTransState = TT { ticks :: !(SizedSeq Tick)
, ccIndices :: !CostCentreState
+ , recSelTicks :: !(IdEnv CoreTickish)
}
initTTState :: TickTransState
initTTState = TT { ticks = emptySS
, ccIndices = newCostCentreState
+ , recSelTicks = emptyVarEnv
}
addMixEntry :: Tick -> TM Int
@@ -1021,6 +1070,10 @@ addMixEntry ent = do
}
return c
+addRecSelTick :: Id -> CoreTickish -> TM ()
+addRecSelTick sel tick =
+ setState $ \s -> s{ recSelTicks = extendVarEnv (recSelTicks s) sel tick }
+
data TickTransEnv = TTE { fileName :: FastString
, density :: TickDensity
, tte_countEntries :: !Bool
@@ -1033,6 +1086,7 @@ data TickTransEnv = TTE { fileName :: FastString
, blackList :: Set RealSrcSpan
, this_mod :: Module
, tickishType :: TickishType
+ , recSelBinds :: IdEnv Id
}
-- deriving Show
@@ -1154,12 +1208,13 @@ ifGoodTickSrcSpan pos then_code else_code = do
good <- isGoodTickSrcSpan pos
if good then then_code else else_code
-bindLocals :: [Id] -> TM a -> TM a
-bindLocals new_ids (TM m)
- = TM $ \ env st ->
- case m env{ inScope = inScope env `extendVarSetList` new_ids } st of
- (r, fv, st') -> (r, fv `delListFromOccEnv` occs, st')
- where occs = [ nameOccName (idName id) | id <- new_ids ]
+bindLocals :: (CollectBinders bndr, CollectFldBinders bndr) => bndr -> TM a -> TM a
+bindLocals from (TM m) = TM $ \env st ->
+ case m (with_bnds env) st of
+ (r, fv, st') -> (r, fv `delListFromOccEnv` (map (nameOccName . idName) new_bnds), st')
+ where with_bnds e = e{ inScope = inScope e `extendVarSetList` new_bnds
+ , recSelBinds = recSelBinds e `plusVarEnv` collectFldBinds from }
+ new_bnds = collectBinds from
withBlackListed :: SrcSpan -> TM a -> TM a
withBlackListed (RealSrcSpan ss _) = withEnv (\ env -> env { blackList = Set.insert ss (blackList env) })
@@ -1186,6 +1241,17 @@ allocTickBox boxLabel countEntries topOnly pos m
tickish <- mkTickish boxLabel countEntries topOnly pos fvs (declPath env)
return (this_loc (XExpr $ HsTick tickish $ this_loc e))
+recSelTick :: Id -> TM (Maybe CoreTickish)
+recSelTick id = ifDensity TickForCoverage maybe_tick (pure Nothing)
+ where
+ maybe_tick = getEnv >>=
+ maybe (pure Nothing) tick . (`lookupVarEnv` id) . recSelBinds
+ tick sel = getState >>=
+ maybe (alloc sel) (pure . Just) . (`lookupVarEnv` sel) . recSelTicks
+ alloc sel = allocATickBox (box sel) False False (getSrcSpan sel) noFVs
+ >>= traverse (\t -> t <$ addRecSelTick sel t)
+ box sel = TopLevelBox [getOccString sel]
+
-- the tick application inherits the source position of its
-- expression argument to support nested box allocations
allocATickBox :: BoxLabel -> Bool -> Bool -> SrcSpan -> FreeVars
@@ -1288,3 +1354,98 @@ matchesOneOfMany lmatches = sum (map matchCount lmatches) > 1
matchCount :: LMatch GhcTc body -> Int
matchCount (L _ (Match { m_grhss = GRHSs _ grhss _ }))
= length grhss
+
+-- | Convenience class used by 'bindLocals' to collect new bindings from
+-- various parts of he AST. Just delegates to
+-- 'collect{Pat,Pats,Local,LStmts}Binders' from 'GHC.Hs.Utils' as appropriate.
+class CollectBinders a where
+ collectBinds :: a -> [Id]
+
+-- | Variant of 'CollectBinders' which collects information on which locals
+-- are bound to record fields (currently only via 'RecordWildCards' or
+-- 'NamedFieldPuns') to enable better coverage support for record selectors.
+--
+-- See Note [Record-selector ticks].
+class CollectFldBinders a where
+ collectFldBinds :: a -> IdEnv Id
+
+instance CollectBinders (LocatedA (Pat GhcTc)) where
+ collectBinds = collectPatBinders CollNoDictBinders
+instance CollectBinders [LocatedA (Pat GhcTc)] where
+ collectBinds = collectPatsBinders CollNoDictBinders
+instance CollectBinders (HsLocalBinds GhcTc) where
+ collectBinds = collectLocalBinders CollNoDictBinders
+instance CollectBinders [LocatedA (Stmt GhcTc (LocatedA (HsExpr GhcTc)))] where
+ collectBinds = collectLStmtsBinders CollNoDictBinders
+instance CollectBinders [LocatedA (Stmt GhcTc (LocatedA (HsCmd GhcTc)))] where
+ collectBinds = collectLStmtsBinders CollNoDictBinders
+
+instance (CollectFldBinders a) => CollectFldBinders [a] where
+ collectFldBinds = foldr (flip plusVarEnv . collectFldBinds) emptyVarEnv
+instance (CollectFldBinders e) => CollectFldBinders (GenLocated l e) where
+ collectFldBinds = collectFldBinds . unLoc
+instance CollectFldBinders (Pat GhcTc) where
+ collectFldBinds ConPat{ pat_args = RecCon HsRecFields{ rec_flds, rec_dotdot } } =
+ collectFldBinds rec_flds `plusVarEnv` plusVarEnvList (zipWith fld_bnds [0..] rec_flds)
+ where n_explicit | Just (L _ (RecFieldsDotDot n)) <- rec_dotdot = n
+ | otherwise = length rec_flds
+ fld_bnds n (L _ HsFieldBind{ hfbLHS = L _ FieldOcc{ foLabel = L _ sel }
+ , hfbRHS = L _ (VarPat _ (L _ var))
+ , hfbPun })
+ | hfbPun || n >= n_explicit = unitVarEnv var sel
+ fld_bnds _ _ = emptyVarEnv
+ collectFldBinds ConPat{ pat_args = PrefixCon pats } = collectFldBinds pats
+ collectFldBinds ConPat{ pat_args = InfixCon p1 p2 } = collectFldBinds [p1, p2]
+ collectFldBinds (LazyPat _ pat) = collectFldBinds pat
+ collectFldBinds (BangPat _ pat) = collectFldBinds pat
+ collectFldBinds (AsPat _ _ pat) = collectFldBinds pat
+ collectFldBinds (ViewPat _ _ pat) = collectFldBinds pat
+ collectFldBinds (ParPat _ pat) = collectFldBinds pat
+ collectFldBinds (ListPat _ pats) = collectFldBinds pats
+ collectFldBinds (TuplePat _ pats _) = collectFldBinds pats
+ collectFldBinds (SumPat _ pats _ _) = collectFldBinds pats
+ collectFldBinds (SigPat _ pat _) = collectFldBinds pat
+ collectFldBinds (XPat exp) = collectFldBinds exp
+ collectFldBinds VarPat{} = emptyVarEnv
+ collectFldBinds WildPat{} = emptyVarEnv
+ collectFldBinds OrPat{} = emptyVarEnv
+ collectFldBinds LitPat{} = emptyVarEnv
+ collectFldBinds NPat{} = emptyVarEnv
+ collectFldBinds NPlusKPat{} = emptyVarEnv
+ collectFldBinds SplicePat{} = emptyVarEnv
+ collectFldBinds EmbTyPat{} = emptyVarEnv
+ collectFldBinds InvisPat{} = emptyVarEnv
+instance (CollectFldBinders r) => CollectFldBinders (HsFieldBind l r) where
+ collectFldBinds = collectFldBinds . hfbRHS
+instance CollectFldBinders XXPatGhcTc where
+ collectFldBinds (CoPat _ pat _) = collectFldBinds pat
+ collectFldBinds (ExpansionPat _ pat) = collectFldBinds pat
+instance CollectFldBinders (HsLocalBinds GhcTc) where
+ collectFldBinds (HsValBinds _ bnds) = collectFldBinds bnds
+ collectFldBinds HsIPBinds{} = emptyVarEnv
+ collectFldBinds EmptyLocalBinds{} = emptyVarEnv
+instance CollectFldBinders (HsValBinds GhcTc) where
+ collectFldBinds (ValBinds _ bnds _) = collectFldBinds bnds
+ collectFldBinds (XValBindsLR (NValBinds bnds _)) = collectFldBinds (map snd bnds)
+instance CollectFldBinders (HsBind GhcTc) where
+ collectFldBinds PatBind{ pat_lhs } = collectFldBinds pat_lhs
+ collectFldBinds (XHsBindsLR AbsBinds{ abs_exports, abs_binds }) =
+ mkVarEnv [ (abe_poly, sel)
+ | ABE{ abe_poly, abe_mono } <- abs_exports
+ , Just sel <- [lookupVarEnv monos abe_mono] ]
+ where monos = collectFldBinds abs_binds
+ collectFldBinds VarBind{} = emptyVarEnv
+ collectFldBinds FunBind{} = emptyVarEnv
+ collectFldBinds PatSynBind{} = emptyVarEnv
+instance CollectFldBinders (Stmt GhcTc e) where
+ collectFldBinds (BindStmt _ pat _) = collectFldBinds pat
+ collectFldBinds (LetStmt _ bnds) = collectFldBinds bnds
+ collectFldBinds (ParStmt _ xs _ _) = collectFldBinds [s | ParStmtBlock _ ss _ _ <- toList xs, s <- ss]
+ collectFldBinds TransStmt{ trS_stmts } = collectFldBinds trS_stmts
+ collectFldBinds RecStmt{ recS_stmts } = collectFldBinds recS_stmts
+ collectFldBinds (XStmtLR (ApplicativeStmt _ args _)) = collectFldBinds (map snd args)
+ collectFldBinds LastStmt{} = emptyVarEnv
+ collectFldBinds BodyStmt{} = emptyVarEnv
+instance CollectFldBinders (ApplicativeArg GhcTc) where
+ collectFldBinds ApplicativeArgOne{ app_arg_pattern } = collectFldBinds app_arg_pattern
+ collectFldBinds ApplicativeArgMany{ bv_pattern } = collectFldBinds bv_pattern
=====================================
docs/users_guide/9.14.1-notes.rst
=====================================
@@ -138,6 +138,11 @@ Compiler
uses of the now deprecated ``pattern`` namespace specifier in import/export
lists. See `GHC Proposal #581, section 2.3 <https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0581-n…>`_.
+- Code coverage (:ghc-flag:`-fhpc`) now treats uses of record fields via
+ :extension:`RecordWildCards` or :extension:`NamedFieldPuns` as if the fields
+ were accessed using the generated record selector functions, marking the fields
+ as covered in coverage reports (:ghc-ticket:`17834`).
+
GHCi
~~~~
=====================================
hadrian/src/Oracles/Flag.hs
=====================================
@@ -7,7 +7,6 @@ module Oracles.Flag (
targetRTSLinkerOnlySupportsSharedLibs,
targetSupportsThreadedRts,
targetSupportsSMP,
- ghcWithInterpreter,
useLibffiForAdjustors,
arSupportsDashL,
arSupportsAtFile
@@ -146,31 +145,5 @@ targetSupportsSMP = do
| goodArch -> return True
| otherwise -> return False
-
--- | When cross compiling, enable for stage0 to get ghci
--- support. But when not cross compiling, disable for
--- stage0, otherwise we introduce extra dependencies
--- like haskeline etc, and mixing stageBoot/stage0 libs
--- can cause extra trouble (e.g. #25406)
---
--- Also checks whether the target supports GHCi.
-ghcWithInterpreter :: Stage -> Action Bool
-ghcWithInterpreter stage = do
- is_cross <- flag CrossCompiling
- goodOs <- anyTargetOs [ OSMinGW32, OSLinux, OSSolaris2 -- TODO "cygwin32"?,
- , OSFreeBSD, OSDragonFly, OSNetBSD, OSOpenBSD
- , OSDarwin, OSKFreeBSD
- , OSWasi ]
- goodArch <- (||) <$>
- anyTargetArch [ ArchX86, ArchX86_64, ArchPPC
- , ArchAArch64, ArchS390X
- , ArchPPC_64 ELF_V1, ArchPPC_64 ELF_V2
- , ArchRISCV64, ArchLoongArch64
- , ArchWasm32 ]
- <*> isArmTarget
- -- Maybe this should just be false for cross compilers. But for now
- -- I've kept the old behaviour where it will say yes. (See #25939)
- return $ goodOs && goodArch && (stage >= Stage1 || is_cross)
-
useLibffiForAdjustors :: Action Bool
useLibffiForAdjustors = queryTargetTarget tgtUseLibffiForAdjustors
=====================================
hadrian/src/Rules/Generate.hs
=====================================
@@ -26,6 +26,7 @@ import Utilities
import GHC.Toolchain as Toolchain hiding (HsCpp(HsCpp))
import GHC.Toolchain.Program
import GHC.Platform.ArchOS
+import Settings.Program (ghcWithInterpreter)
-- | Track this file to rebuild generated files whenever it changes.
trackGenerateHs :: Expr ()
=====================================
hadrian/src/Settings/Builders/Cabal.hs
=====================================
@@ -11,7 +11,7 @@ import Settings.Builders.Common
import qualified Settings.Builders.Common as S
import Control.Exception (assert)
import qualified Data.Set as Set
-import Settings.Program (programContext)
+import Settings.Program (programContext, ghcWithInterpreter)
import GHC.Toolchain (ccLinkProgram, tgtCCompilerLink)
import GHC.Toolchain.Program (prgFlags)
=====================================
hadrian/src/Settings/Packages.hs
=====================================
@@ -11,6 +11,7 @@ import Settings.Builders.Common (wayCcArgs)
import GHC.Toolchain.Target
import GHC.Platform.ArchOS
import Data.Version.Extra
+import Settings.Program (ghcWithInterpreter)
-- | Package-specific command-line arguments.
packageArgs :: Args
=====================================
hadrian/src/Settings/Program.hs
=====================================
@@ -1,12 +1,17 @@
module Settings.Program
( programContext
+ , ghcWithInterpreter
) where
import Base
import Context
import Oracles.Flavour
+import Oracles.Flag
import Packages
+import GHC.Platform.ArchOS
+import Settings.Builders.Common (anyTargetOs, anyTargetArch, isArmTarget)
+
-- TODO: there is duplication and inconsistency between this and
-- Rules.Program.getProgramContexts. There should only be one way to
-- get a context/contexts for a given stage and package.
@@ -24,3 +29,33 @@ programContext stage pkg = do
notStage0 (Stage0 {}) = False
notStage0 _ = True
+
+-- | When cross compiling, enable for stage0 to get ghci
+-- support. But when not cross compiling, disable for
+-- stage0, otherwise we introduce extra dependencies
+-- like haskeline etc, and mixing stageBoot/stage0 libs
+-- can cause extra trouble (e.g. #25406)
+--
+-- Also checks whether the target supports GHCi.
+ghcWithInterpreter :: Stage -> Action Bool
+ghcWithInterpreter stage = do
+ is_cross <- flag CrossCompiling
+ goodOs <- anyTargetOs [ OSMinGW32, OSLinux, OSSolaris2 -- TODO "cygwin32"?,
+ , OSFreeBSD, OSDragonFly, OSNetBSD, OSOpenBSD
+ , OSDarwin, OSKFreeBSD
+ , OSWasi ]
+ goodArch <- (||) <$>
+ anyTargetArch [ ArchX86, ArchX86_64, ArchPPC
+ , ArchAArch64, ArchS390X
+ , ArchPPC_64 ELF_V1, ArchPPC_64 ELF_V2
+ , ArchRISCV64, ArchLoongArch64
+ , ArchWasm32 ]
+ <*> isArmTarget
+ -- The explicit support list is essentially a list of platforms for which
+ -- the RTS linker has support. If the RTS linker is not supported then we
+ -- fall back on dynamic linking:
+ dynamicGhcProgs <- askDynGhcPrograms
+
+ -- Maybe this should just be false for cross compilers. But for now
+ -- I've kept the old behaviour where it will say yes. (See #25939)
+ return $ ((goodOs && goodArch) || dynamicGhcProgs) && (stage >= Stage1 || is_cross)
=====================================
testsuite/tests/hpc/recsel/Makefile
=====================================
@@ -0,0 +1,3 @@
+TOP=../../..
+include $(TOP)/mk/boilerplate.mk
+include $(TOP)/mk/test.mk
=====================================
testsuite/tests/hpc/recsel/recsel.hs
=====================================
@@ -0,0 +1,49 @@
+{-# LANGUAGE RecordWildCards, NamedFieldPuns, Arrows #-}
+
+import Control.Monad.Identity
+import Control.Arrow (runKleisli, arr, returnA)
+import Data.Maybe
+import Data.List
+import Data.Bifunctor
+import Trace.Hpc.Mix
+import Trace.Hpc.Tix
+import Trace.Hpc.Reflect
+
+data Foo = Foo { fooA, fooB, fooC, fooD, fooE, fooF, fooG, fooH, fooI
+ , fooJ, fooK, fooL, fooM, fooN, fooO :: Int }
+data Bar = Bar { barFoo :: Foo }
+
+fAB Foo{..} = fooA + fooB
+fC Foo{fooC} = fooC
+fD x Foo{..} = fromMaybe 0 $ if x then Just fooD else Nothing
+fE Bar{barFoo = Foo{..}} = fooE
+fF Foo{fooF = f} = f
+fG f = let Foo{..} = f in fooG
+fH f = runIdentity $ do
+ Foo{..} <- pure f
+ return fooH
+fI f = runIdentity $ do
+ let Foo{..} = f
+ return fooI
+fJ f = [ fooJ | let Foo{..} = f ] !! 0
+fK = runIdentity . runKleisli (proc f -> do
+ Foo{..} <- arr id -< f
+ returnA -< fooK)
+fL = runIdentity . runKleisli (proc f -> do
+ let Foo{..} = f;
+ returnA -< fooL)
+fM f | Foo{..} <- f = fooM
+fN f = fooN f
+fO = runIdentity . runKleisli (proc Foo{..} -> returnA -< fooO)
+
+recSel (n, TopLevelBox [s]) | any (`isPrefixOf` s) ["foo", "bar"] = Just (n, s)
+recSel _ = Nothing
+
+main = do
+ let foo = Foo 42 23 0 1 2 3 4 5 6 7 0xaffe 9 10 11 12
+ mapM_ (print . ($ foo))
+ [fAB, fC, fD False, fE . Bar, fF, fG, fH, fI, fJ, fK, fL, fM, fN, fO]
+ (Mix _ _ _ _ mixs) <- readMix [".hpc"] (Left "Main")
+ let sels = mapMaybe recSel . zip [0..] $ map snd mixs
+ (Tix [TixModule "Main" _ _ tix]) <- examineTix
+ mapM_ print . sortOn snd $ map (first (tix !!)) sels
=====================================
testsuite/tests/hpc/recsel/recsel.stdout
=====================================
@@ -0,0 +1,30 @@
+65
+0
+0
+2
+3
+4
+5
+6
+7
+45054
+9
+10
+11
+12
+(0,"barFoo")
+(1,"fooA")
+(1,"fooB")
+(1,"fooC")
+(0,"fooD")
+(1,"fooE")
+(0,"fooF")
+(1,"fooG")
+(1,"fooH")
+(1,"fooI")
+(1,"fooJ")
+(1,"fooK")
+(1,"fooL")
+(1,"fooM")
+(1,"fooN")
+(1,"fooO")
=====================================
testsuite/tests/hpc/recsel/test.T
=====================================
@@ -0,0 +1,7 @@
+setTestOpts([omit_ghci, when(fast(), skip), js_skip])
+
+test('recsel',
+ [ignore_extension,
+ when(arch('wasm32'), fragile(23243))],
+ compile_and_run, ['-fhpc'])
+
=====================================
testsuite/tests/profiling/should_run/caller-cc/all.T
=====================================
@@ -8,6 +8,7 @@ setTestOpts(only_ways(prof_ways))
setTestOpts(extra_files(['Main.hs']))
setTestOpts(extra_run_opts('7'))
setTestOpts(grep_prof("Main.hs"))
+setTestOpts(grep_prof("calling:"))
# N.B. Main.hs is stolen from heapprof001.
=====================================
utils/haddock/html-test/ref/Bug25739.html
=====================================
@@ -0,0 +1,62 @@
+<html xmlns="http://www.w3.org/1999/xhtml"
+><head
+ ><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"
+ /><meta name="viewport" content="width=device-width, initial-scale=1"
+ /><title
+ >Bug25739</title
+ ><link href="#" rel="stylesheet" type="text/css" title="Linuwial"
+ /><link rel="stylesheet" type="text/css" href="#"
+ /><link rel="stylesheet" type="text/css" href="#"
+ /><script src="haddock-bundle.min.js" async="async" type="text/javascript"
+ ></script
+ ><script type="text/x-mathjax-config"
+ >MathJax.Hub.Config({ tex2jax: { processClass: "mathjax", ignoreClass: ".*" } });</script
+ ><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js?config=TeX-…" type="text/javascript"
+ ></script
+ ></head
+ ><body
+ ><div id="package-header"
+ ><span class="caption empty"
+ > </span
+ ><ul class="links" id="page-menu"
+ ><li
+ ><a href="#"
+ >Contents</a
+ ></li
+ ><li
+ ><a href="#"
+ >Index</a
+ ></li
+ ></ul
+ ></div
+ ><div id="content"
+ ><div id="module-header"
+ ><table class="info"
+ ><tr
+ ><th
+ >Safe Haskell</th
+ ><td
+ >None</td
+ ></tr
+ ></table
+ ><p class="caption"
+ >Bug25739</p
+ ></div
+ ><div id="interface"
+ ><h1
+ >Documentation</h1
+ ><div class="top"
+ ><p class="src"
+ ><span class="keyword"
+ >data</span
+ > <a id="t:Bar" class="def"
+ >Bar</a
+ > :: Foo <a href="#" class="selflink"
+ >#</a
+ ></p
+ ></div
+ ></div
+ ></div
+ ></body
+ ></html
+>
=====================================
utils/haddock/html-test/src/Bug25739.hs
=====================================
@@ -0,0 +1,5 @@
+{-# LANGUAGE TypeData #-}
+
+module Bug25739 (Bar) where
+
+type data Foo = Bar
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/58bcdc47edf4e6f2855c5e29e1efc4…
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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/58bcdc47edf4e6f2855c5e29e1efc4…
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[Git][ghc/ghc][wip/T25716] 93 commits: Don't emit unprintable characters when printing Uniques
by Ben Gamari (＠bgamari) 01 Jul '25
by Ben Gamari (＠bgamari) 01 Jul '25
01 Jul '25
Ben Gamari pushed to branch wip/T25716 at Glasgow Haskell Compiler / GHC
Commits:
3b3a5dec by Ben Gamari at 2025-05-15T16:10:01-04:00
Don't emit unprintable characters when printing Uniques
When faced with an unprintable tag we now instead print the codepoint
number.
Fixes #25989.
(cherry picked from commit e832b1fadee66e8d6dd7b019368974756f8f8c46)
- - - - -
e1ef8974 by Mike Pilgrem at 2025-05-16T16:09:14-04:00
Translate iff in Haddock documentation into everyday English
- - - - -
fd64667d by Vladislav Zavialov at 2025-05-20T03:25:08-04:00
Allow the 'data' keyword in import/export lists (#25899)
This patch introduces the 'data' namespace specifier in import and
export lists. The intended use is to import data constructors without
their parent type constructors, e.g.
import Data.Proxy as D (data Proxy)
type DP = D.Proxy -- promoted data constructor
Additionally, it is possible to use 'data' to explicitly qualify any
data constructors or terms, incl. operators and field selectors
import Prelude (Semigroup(data (<>)))
import Data.Function (data (&))
import Data.Monoid (data Dual, data getDual)
x = Dual "Hello" <> Dual "World" & getDual
The implementation mostly builds on top of the existing logic for the
'type' and 'pattern' namespace specifiers, plus there are a few tweaks
to how we generate suggestions in error messages.
- - - - -
acc86753 by Ben Gamari at 2025-05-20T03:25:51-04:00
compiler: Use field selectors when creating BCOs
This makes it easier to grep for these fields.
- - - - -
60a55fd7 by Ben Gamari at 2025-05-20T03:25:51-04:00
compiler: Clarify BCO size
Previously the semantics and size of StgBCO was a bit unclear.
Specifically, the `size` field was documented to contain the size of the
bitmap whereas it was actually the size of the closure *and* bitmap.
Additionally, it was not as clear as it could be that the bitmap was a
full StgLargeBitmap with its own `size` field.
- - - - -
ac9fb269 by Simon Peyton Jones at 2025-05-20T09:19:04-04:00
Track rewriter sets more accurately in constraint solving
This MR addresses #26003, by refactoring the arcane
intricacies of Note [Equalities with incompatible kinds].
NB: now retitled to
Note [Equalities with heterogeneous kinds].
and the main Note for this MR.
In particular:
* Abandon invariant (COERCION-HOLE) in Note [Unification preconditions] in
GHC.Tc.Utils.Unify.
* Abandon invariant (TyEq:CH)) in Note [Canonical equalities] in
GHC.Tc.Types.Constraint.
* Instead: add invariant (REWRITERS) to Note [Unification preconditions]:
unify only if the constraint has an empty rewriter set.
Implementation:
* In canEqCanLHSFinish_try_unification, skip trying unification if there is a
non-empty rewriter set.
* To do this, make sure the rewriter set is zonked; do so in selectNextWorkItem,
which also deals with prioritisation.
* When a coercion hole is filled, kick out inert equalities that have that hole
as a rewriter. It might now be unlocked and available to unify.
* Remove the ad-hoc `ch_hetero_kind` field of `CoercionHole`.
* In `selectNextWorkItem`, priorities equalities withan empty rewriter set.
* Defaulting: see (DE6) in Note [Defaulting equalities]
and Note [Limited defaulting in the ambiguity check]
* Concreteness checks: there is some extra faff to try to get decent
error messages when the FRR (representation-polymorphism) checks
fail. In partiular, add a "When unifying..." explanation when the
representation-polymorphism check arose from another constraint.
- - - - -
86406f48 by Cheng Shao at 2025-05-20T09:19:47-04:00
rts: fix rts_clearMemory logic when sanity checks are enabled
This commit fixes an RTS assertion failure when invoking
rts_clearMemory with +RTS -DS. -DS implies -DZ which asserts that free
blocks contain 0xaa as the designated garbage value. Also adds the
sanity way to rts_clearMemory test to prevent future regression.
Closes #26011.
ChatGPT Codex automatically diagnosed the issue and proposed the
initial patch in a single shot, given a GHC checkout and the following
prompt:
---
Someone is reporting the following error when attempting to use `rts_clearMemory` with the RTS option `-DS`:
```
test.wasm: internal error: ASSERTION FAILED: file rts/sm/Storage.c, line 1216
(GHC version 9.12.2.20250327 for wasm32_unknown_wasi)
Please report this as a GHC bug: https://www.haskell.org/ghc/reportabug
```
What's the culprit? How do I look into this issue?
---
I manually reviewed & revised the patch, tested and submitted it.
- - - - -
7147370b by Cheng Shao at 2025-05-20T17:22:19-04:00
compiler: do not allocate strings in bytecode assembler
This patch refactors the compiler to avoid allocating iserv buffers
for BCONPtrStr at assemble-time. Now BCONPtrStr ByteStrings are
recorded as a part of CompiledByteCode, and actual allocation only
happens at link-time. This refactoring is necessary for adding
bytecode serialization functionality, as explained by the revised
comments in this commit.
- - - - -
a67db612 by Cheng Shao at 2025-05-20T17:22:19-04:00
compiler: make bc_strs serializable
This commit makes the bc_strs field in CompiledByteCode serializable;
similar to previous commit, we preserve the ByteString directly and
defer the actual allocation to link-time, as mentioned in updated
comment.
- - - - -
5faf34ef by Cheng Shao at 2025-05-20T17:22:19-04:00
compiler: make bc_itbls serializable
This commit makes bc_itbls in CompiledByteCode serializable. A
dedicated ConInfoTable datatype has been added in ghci which is the
recipe for dynamically making a datacon's info table, containing the
payload of the MkConInfoTable iserv message.
- - - - -
2abaf8c1 by Cheng Shao at 2025-05-20T17:22:19-04:00
compiler: remove FFIInfo bookkeeping in BCO
This commit removes the bc_ffis field from CompiledByteCode
completely, as well as all the related bookkeeping logic in
GHC.StgToByteCode. bc_ffis is actually *unused* in the rest of GHC
codebase! It is merely a list of FFIInfo, which is just a remote
pointer of the libffi ffi_cif struct; once we allocate the ffi_cif
struct and put its pointer in a CCALL instruction, we'll never free it
anyway. So there is no point of bookkeeping.
- - - - -
adb9e4d2 by Cheng Shao at 2025-05-20T17:22:19-04:00
compiler: make FFIInfo serializable in BCO
This commit makes all the FFIInfo needed in CCALL instructions
serializable. Previously, when doing STG to BCO lowering, we would
allocate a libffi ffi_cif struct and keep its remote pointer as
FFIInfo; but actually we can just keep the type signature as FFIInfo
and defer the actual allocation to link-time.
- - - - -
200f401b by Cheng Shao at 2025-05-20T17:22:19-04:00
ghci: remove redundant NewBreakModule message
This commit removes the redundant NewBreakModule message from ghci: it
just allocates two strings! This functionality can be implemented with
existing MallocStrings in one iserv call.
- - - - -
ddaadca6 by Cheng Shao at 2025-05-20T17:22:19-04:00
compiler: make breakpoint module name and unit id serializable
This commit makes breakpoint module name and unit id serializable, in
BRK_FUN instructions as well as ModBreaks. We can simply keep the
module name and unit ids, and defer the buffer allocation to link
time.
- - - - -
a0fde202 by Cheng Shao at 2025-05-20T17:22:19-04:00
compiler: remove unused newModule
This commit removes the now unused newModule function from GHC.
- - - - -
68c8f140 by Cheng Shao at 2025-05-20T17:22:19-04:00
compiler: add BCONPtrFS for interned top level string literals in BCO
This commit adds BCONPtrFS as a BCO non-pointer literal kind, which
has the same semantics of BCONPtrStr, except it contains a FastString
instead of a ByteString. By using BCONPtrFS to represent top level
string literals that are already FastString in the compilation
pipeline, we enjoy the FastString interning logic and avoid allocating
a bunch of redundant ByteStrings for the same FastStrings, especially
when we lower the BRK_FUN instruction.
- - - - -
f2b532bc by Peng Fan at 2025-05-20T17:23:15-04:00
hadrian: enable GHCi for loongarch64
- - - - -
8ded2330 by kwxm at 2025-05-20T17:24:07-04:00
Fix bugs in `integerRecipMod` and `integerPowMod`
This fixes #26017.
* `integerRecipMod x 1` now returns `(# 1 | #)` for all x; previously it
incorrectly returned `(# | () #)`, indicating failure.
* `integerPowMod 0 e m` now returns `(# | () #)` for e<0 and m>1, indicating
failure; previously it incorrectly returned `(# 0 | #)`.
- - - - -
c9abb87c by Andreas Klebinger at 2025-05-20T17:24:50-04:00
Specialise: Don't float out constraint components.
It was fairly complex to do so and it doesn't seem to improve anything.
Nofib allocations were unaffected as well.
See also Historical Note [Floating dictionaries out of cases]
- - - - -
202b201c by Andreas Klebinger at 2025-05-21T10:16:14-04:00
Interpreter: Add limited support for direct primop evaluation.
This commit adds support for a number of primops directly
to the interpreter. This avoids the indirection of going
through the primop wrapper for those primops speeding interpretation
of optimized code up massively.
Code involving IntSet runs about 25% faster with optimized core and these
changes. For core without breakpoints it's even more pronouced and I
saw reductions in runtime by up to 50%.
Running GHC itself in the interpreter was sped up by ~15% through this
change.
Additionally this comment does a few other related changes:
testsuite:
* Run foundation test in ghci and ghci-opt ways to test these
primops.
* Vastly expand the foundation test to cover all basic primops
by comparing result with the result of calling the wrapper.
Interpreter:
* When pushing arguments for interpreted primops extend each argument to
at least word with when pushing. This avoids some issues with big
endian. We can revisit this if it causes performance issues.
* Restructure the stack chunk check logic. There are now macros for
read accesses which might cross stack chunk boundries and macros which
omit the checks which are used when we statically know we access an
address in the current stack chunk.
- - - - -
67a177b4 by sheaf at 2025-05-21T10:17:04-04:00
QuickLook: do a shape test before unifying
This commit ensures we do a shape test before unifying. This ensures
we don't try to unify a TyVarTv with a non-tyvar, e.g.
alpha[tyv] := Int
On the way, we refactor simpleUnifyCheck:
1. Move the checkTopShape check into simpleUnifyCheck
2. Refactors simpleUnifyCheck to return a value of the new type
SimpleUnifyResult type. Now, simpleUnifyCheck returns "can unify",
"cannot unify" or "dunno" (with "cannot unify" being the new result
it can return). Now:
- touchabilityTest is included; it it fails we return "cannot unify"
- checkTopShape now returns "cannot unify" instead of "dunno" upon failure
3. Move the call to simpleUnifyCheck out of checkTouchableTyVarEq.
After that, checkTouchableTyVarEq becames a simple call to
checkTyEqRhs, so we inline it.
This allows the logic in canEqCanLHSFinish_try_unification to be simplified.
In particular, we now avoid calling 'checkTopShape' twice.
Two further changes suggested by Simon were also implemented:
- In canEqCanLHSFinish, if checkTyEqRhs returns PuFail with
'do_not_prevent_rewriting', we now **continue with this constraint**.
This allows us to use the constraint for rewriting.
- checkTyEqRhs now has a top-level check to avoid flattening a tyfam app
in a top-level equality of the form alpha ~ F tys, as this is
going around in circles. This simplifies the implementation without
any change in behaviour.
Fixes #25950
Fixes #26030
- - - - -
4020972c by sheaf at 2025-05-21T10:17:04-04:00
FixedRuntimeRepError: omit unhelpful explanation
This commit tweaks the FixedRuntimeRepError case of pprTcSolverReportMsg,
to avoid including an explanation which refers to a type variable that
appears nowhere else.
For example, the old error message could look like the following:
The pattern binding does not have a fixed runtime representation.
Its type is:
T :: TYPE R
Cannot unify ‘R’ with the type variable ‘c0’
because the former is not a concrete ‘RuntimeRep’.
With this commit, we now omit the last two lines, because the concrete
type variable (here 'c0') does not appear in the type displayed to the
user (here 'T :: TYPE R').
- - - - -
6d058a69 by Andrea Bedini at 2025-05-21T16:00:51-04:00
Don't fail when ghcversion.h can't be found (#26018)
If ghcversion.h can't be found, don't try to include it. This happens
when there is no rts package in the package db and when -ghcversion-file
argument isn't passed.
Co-authored-by: Syvlain Henry <sylvain(a)haskus.fr>
- - - - -
b1212fbf by Vladislav Zavialov at 2025-05-21T16:01:33-04:00
Implement -Wpattern-namespace-specifier (#25900)
In accordance with GHC Proposal #581 "Namespace-specified imports",
section 2.3 "Deprecate use of pattern in import/export lists", the
`pattern` namespace specifier is now deprecated.
Test cases: T25900 T25900_noext
- - - - -
e650ec3e by Ben Gamari at 2025-05-23T03:42:46-04:00
base: Forward port changelog language from 9.12
- - - - -
94cd9ca4 by Ben Gamari at 2025-05-23T03:42:46-04:00
base: Fix RestructuredText-isms in changelog
- - - - -
7722232c by Ben Gamari at 2025-05-23T03:42:46-04:00
base: Note strictness changes made in 4.16.0.0
Addresses #25886.
- - - - -
3f4b823c by Ben Gamari at 2025-05-23T03:43:28-04:00
rts/linker: Factor out ProddableBlocks machinery
- - - - -
6e23fef2 by Ben Gamari at 2025-05-23T03:43:28-04:00
rts/linker: Improve efficiency of proddable blocks structure
Previously the linker's "proddable blocks" check relied on a simple
linked list of spans. This resulted in extremely poor complexity while
linking objects with lots of small sections (e.g. objects built with
split sections).
Rework the mechanism to instead use a simple interval set implemented
via binary search.
Fixes #26009.
- - - - -
ea74860c by Ben Gamari at 2025-05-23T03:43:28-04:00
testsuite: Add simple functional test for ProddableBlockSet
- - - - -
74c4db46 by Ben Gamari at 2025-05-23T03:43:28-04:00
rts/linker/PEi386: Drop check for LOAD_LIBRARY_SEARCH_*_DIRS
The `LOAD_LIBRARY_SEARCH_USER_DIRS` and
`LOAD_LIBRARY_SEARCH_DEFAULT_DIRS` were introduced in Windows Vista and
have been available every since. As we no longer support Windows XP we
can drop this check.
Addresses #26009.
- - - - -
972d81d6 by Ben Gamari at 2025-05-23T03:43:28-04:00
rts/linker/PEi386: Clean up code style
- - - - -
8a1073a5 by Ben Gamari at 2025-05-23T03:43:28-04:00
rts/Hash: Factor out hashBuffer
This is a useful helper which can be used for non-strings as well.
- - - - -
44f509f2 by Ben Gamari at 2025-05-23T03:43:28-04:00
rts/linker/PEi386: Fix incorrect use of break in nested for
Previously the happy path of PEi386 used `break` in a double-`for` loop
resulting in redundant calls to `LoadLibraryEx`.
Fixes #26052.
- - - - -
bfb12783 by Ben Gamari at 2025-05-23T03:43:28-04:00
rts: Correctly mark const arguments
- - - - -
08469ff8 by Ben Gamari at 2025-05-23T03:43:28-04:00
rts/linker/PEi386: Don't repeatedly load DLLs
Previously every DLL-imported symbol would result in a call to
`LoadLibraryEx`. This ended up constituting over 40% of the runtime of
`ghc --interactive -e 42` on Windows. Avoid this by maintaining a
hash-set of loaded DLL names, skipping the call if we have already
loaded the requested DLL.
Addresses #26009.
- - - - -
823d1ccf by Ben Gamari at 2025-05-23T03:43:28-04:00
rts/linker: Expand comment describing ProddableBlockSet
- - - - -
e9de9e0b by Sylvain Henry at 2025-05-23T15:12:34-04:00
Remove emptyModBreaks
Remove emptyModBreaks and track the absence of ModBreaks with `Maybe
ModBreaks`. It avoids testing for null pointers...
- - - - -
17db44c5 by Ben Gamari at 2025-05-23T15:13:16-04:00
base: Expose Backtraces constructor and fields
This was specified in the proposal (CLC #199) yet somehow didn't make it
into the implementation.
Fixes #26049.
- - - - -
b08c08ae by soulomoon at 2025-05-28T01:57:23+08:00
Refactor handling of imported COMPLETE pragmas
from the HPT
Previously, we imported COMPLETE pragmas from all modules in the Home
Package Table (HPT) during type checking. However, since !13675, there
may be non-below modules in the HPT from the dependency tree that we do
not want to import COMPLETE pragmas from. This refactor changes the way
we handle COMPLETE pragmas from the HPT to only import them from modules
that are "below" the current module in the HPT.
- Add hugCompleteSigsBelow to filter COMPLETE pragmas from "below"
modules in the HPT, mirroring hugRulesBelow.
- Move responsibility for calling hugCompleteSigsBelow to tcRnImports,
storing the result in the new tcg_complete_match_env field of TcGblEnv.
- Update getCompleteMatchesTcM to use tcg_complete_match_env.
This refactor only affects how COMPLETE pragmas are imported from the
HPT, imports from external packages are unchanged.
- - - - -
16014bf8 by Hécate Kleidukos at 2025-05-28T20:09:34-04:00
Expose all of Backtraces' internals for ghc-internal
Closes #26049
- - - - -
a0adc30d by Ryan Hendrickson at 2025-05-30T14:12:52-04:00
haddock: Fix links to type operators
- - - - -
7b64697c by Mario Blažević at 2025-05-30T14:13:41-04:00
Introduce parenBreakableList and use it in ppHsContext
- - - - -
5f213bff by fendor at 2025-06-02T09:16:24+02:00
Make GHCi commands compatible with multiple home units
=== Design
We enable all GHCi features that were previously guarded by the `inMulti`
option.
GHCi supported multiple home units up to a certain degree for quite a while now.
The supported feature set was limited, due to a design impasse:
One of the home units must be "active", e.g., there must be one `HomeUnit`
whose `UnitId` is "active" which is returned when calling
```haskell
do
hscActiveUnitId <$> getSession
```
This makes sense in a GHC session, since you are always compiling a particular
Module, but it makes less intuitive sense in an interactive session.
Given an expression to evaluate, we can't easily tell in which "context" the expression
should be parsed, typechecked and evaluated.
That's why initially, most of GHCi features, except for `:reload`ing were disabled
if the GHCi session had more than one `HomeUnitEnv`.
We lift this restriction, enabling all features of GHCi for the multiple home unit case.
To do this, we fundamentally change the `HomeUnitEnv` graph to be multiple home unit first.
Instead of differentiating the case were we have a single home unit and multiple,
we now always set up a multiple home unit session that scales seamlessly to an arbitrary
amount of home units.
We introduce two new `HomeUnitEnv`s that are always added to the `HomeUnitGraph`.
They are:
The "interactive-ghci", called the `interactiveGhciUnit`, contains the same
`DynFlags` that are used by the `InteractiveContext` for interactive evaluation
of expressions.
This `HomeUnitEnv` is only used on the prompt of GHCi, so we may refer to it as
"interactive-prompt" unit.
See Note [Relation between the `InteractiveContext` and `interactiveGhciUnitId`]
for discussing its role.
And the "interactive-session"", called `interactiveSessionUnit` or
`interactiveSessionUnitId`, which is used for loading Scripts into
GHCi that are not `Target`s of any home unit, via `:load` or `:add`.
Both of these "interactive" home units depend on all other `HomeUnitEnv`s that
are passed as arguments on the cli.
Additionally, the "interactive-ghci" unit depends on `interactive-session`.
We always evaluate expressions in the context of the
"interactive-ghci" session.
Since "interactive-ghci" depends on all home units, we can import any `Module`
from the other home units with ease.
As we have a clear `HomeUnitGraph` hierarchy, we can set `interactiveGhciUnitId`
as the active home unit for the full duration of the GHCi session.
In GHCi, we always set `interactiveGhciUnitId` to be the currently active home unit.
=== Implementation Details
Given this design idea, the implementation is relatively straight
forward.
The core insight is that a `ModuleName` is not sufficient to identify a
`Module` in the `HomeUnitGraph`. Thus, large parts of the PR is simply
about refactoring usages of `ModuleName` to prefer `Module`, which has a
`Unit` attached and is unique over the `HomeUnitGraph`.
Consequentially, most usages of `lookupHPT` are likely to be incorrect and have
been replaced by `lookupHugByModule` which is keyed by a `Module`.
In `GHCi/UI.hs`, we make sure there is only one location where we are
actually translating `ModuleName` to a `Module`:
* `lookupQualifiedModuleName`
If a `ModuleName` is ambiguous, we detect this and report it to the
user.
To avoid repeated lookups of `ModuleName`s, we store the `Module` in the
`InteractiveImport`, which additionally simplifies the interface
loading.
A subtle detail is that the `DynFlags` of the `InteractiveContext` are
now stored both in the `HomeUnitGraph` and in the `InteractiveContext`.
In UI.hs, there are multiple code paths where we are careful to update
the `DynFlags` in both locations.
Most importantly in `addToProgramDynFlags`.
---
There is one metric increase in this commit:
-------------------------
Metric Increase:
T4029
-------------------------
It is an increase from 14.4 MB to 16.1 MB (+11.8%) which sounds like a
pretty big regression at first.
However, we argue this increase is solely caused by using more data
structures for managing multiple home units in the GHCi session.
In particular, due to the design decision of using three home units, the
base memory usage increases... but by how much?
A big contributor is the `UnitState`, of which we have three now, which
on its own 260 KB per instance. That makes an additional memory usage of
520 KB, already explaining a third of the overall memory usage increase.
Then we store more elements in the `HomeUnitGraph`, we have more
`HomeUnitEnv` entries, etc...
While we didn't chase down each byte, we looked at the memory usage over time
for both `-hi` and `-hT` profiles and can say with confidence while the memory
usage increased slightly, we did not introduce any space leak, as
the graph looks almost identical as the memory usage graph of GHC HEAD.
---
Adds testcases for GHCi multiple home units session
* Test truly multiple home unit sessions, testing reload logic and code evaluation.
* Test that GHCi commands such as `:all-types`, `:browse`, etc., work
* Object code reloading for home modules
* GHCi debugger multiple home units session
- - - - -
de603d01 by fendor at 2025-06-02T09:16:24+02:00
Update "loading compiled code" GHCi documentation
To use object code in GHCi, the module needs to be compiled for use in
GHCi. To do that, users need to compile their modules with:
* `-dynamic`
* `-this-unit-id interactive-session`
Otherwise, the interface files will not match.
- - - - -
b255a8ca by Vladislav Zavialov at 2025-06-02T16:00:12-04:00
docs: Fix code example for NoListTuplePuns
Without the fix, the example produces an error:
Test.hs:11:3: error: [GHC-45219]
• Data constructor ‘Tuple’ returns type ‘Tuple2 a b’
instead of an instance of its parent type ‘Tuple a’
• In the definition of data constructor ‘Tuple’
In the data type declaration for ‘Tuple’
Fortunately, a one line change makes it compile.
- - - - -
6558467c by Ryan Hendrickson at 2025-06-06T05:46:58-04:00
haddock: Parse math even after ordinary characters
Fixes a bug where math sections were not recognized if preceded by a
character that isn't special (like space or a markup character).
- - - - -
265d0024 by ARATA Mizuki at 2025-06-06T05:47:48-04:00
AArch64 NCG: Fix sub-word arithmetic right shift
As noted in Note [Signed arithmetic on AArch64], we should zero-extend sub-word values.
Fixes #26061
- - - - -
05e9be18 by Simon Hengel at 2025-06-06T05:48:35-04:00
Allow Unicode in "message" and "hints" with -fdiagnostics-as-json
(fixes #26075)
- - - - -
bfa6b70f by ARATA Mizuki at 2025-06-06T05:49:24-04:00
x86 NCG: Fix code generation of bswap64 on i386
Co-authored-by: sheaf <sam.derbyshire(a)gmail.com>
Fix #25601
- - - - -
35826d8b by Matthew Pickering at 2025-06-08T22:00:41+01:00
Hadrian: Add option to generate .hie files for stage1 libraries
The +hie_files flavour transformer can be enabled to produce hie files
for stage1 libraries. The hie files are produced in the
"extra-compilation-artifacts" folder and copied into the resulting
bindist.
At the moment the hie files are not produced for the release flavour,
they add about 170M to the final bindist.
Towards #16901
- - - - -
e2467dbd by Ryan Hendrickson at 2025-06-09T13:07:05-04:00
Fix various failures to -fprint-unicode-syntax
- - - - -
1d99d3e4 by maralorn at 2025-06-12T03:47:39-04:00
Add necessary flag for js linking
- - - - -
974d5734 by maralorn at 2025-06-12T03:47:39-04:00
Don’t use additional linker flags to detect presence of -fno-pie in configure.ac
This mirrors the behavior of ghc-toolchain
- - - - -
1e9eb118 by Andrew Lelechenko at 2025-06-12T03:48:21-04:00
Add HasCallStack to Control.Monad.Fail.fail
CLC proposal https://github.com/haskell/core-libraries-committee/issues/327
2% compile-time allocations increase in T3064, likely because `fail`
is now marginally more expensive to compile.
Metric Increase:
T3064
- - - - -
6d12060f by meooow25 at 2025-06-12T14:26:07-04:00
Bump containers submodule to 0.8
Also
* Disable -Wunused-imports for containers
* Allow containers-0.8 for in-tree packages
* Bump some submodules so that they allow containers-0.8. These are not
at any particular versions.
* Remove unused deps containers and split from ucd2haskell
* Fix tests affected by the new containers and hpc-bin
- - - - -
537bd233 by Peng Fan at 2025-06-12T14:27:02-04:00
NCG/LA64: Optimize code generation and reduce build-directory size.
1. makeFarBranches: Prioritize fewer instruction sequences.
2. Prefer instructions with immediate numbers to reduce register moves,
e.g. andi,ori,xori,addi.
3. Ppr: Remove unnecessary judgments.
4. genJump: Avoid "ld+jr" as much as possible.
5. BCOND and BCOND1: Implement conditional jumps with two jump ranges,
with limited choice of the shortest.
6. Implement FSQRT, CLT, CTZ.
7. Remove unnecessary code.
- - - - -
19f20861 by Simon Peyton Jones at 2025-06-13T09:51:11-04:00
Improve redundant constraints for instance decls
Addresses #25992, which showed that the default methods
of an instance decl could make GHC fail to report redundant
constraints.
Figuring out how to do this led me to refactor the computation
of redundant constraints. See the entirely rewritten
Note [Tracking redundant constraints]
in GHC.Tc.Solver.Solve
- - - - -
1d02798e by Matthew Pickering at 2025-06-13T09:51:54-04:00
Refactor the treatment of nested Template Haskell splices
* The difference between a normal splice, a quasiquoter and implicit
splice caused by lifting is stored in the AST after renaming.
* Information that the renamer learns about splices is stored in the
relevant splice extension points (XUntypedSpliceExpr, XQuasiQuote).
* Normal splices and quasi quotes record the flavour of splice
(exp/pat/dec etc)
* Implicit lifting stores information about why the lift was attempted,
so if it fails, that can be reported to the user.
* After renaming, the decision taken to attempt to implicitly lift a
variable is stored in the `XXUntypedSplice` extension field in the
`HsImplicitLiftSplice` constructor.
* Since all the information is stored in the AST, in `HsUntypedSplice`,
the type of `PendingRnSplice` now just stores a `HsUntypedSplice`.
* Error messages since the original program can be easily
printed, this is noticeable in the case of implicit lifting.
* The user-written syntax is directly type-checked. Before, some
desugaring took place in the
* Fixes .hie files to work better with nested splices (nested splices
are not indexed)
* The location of the quoter in a quasiquote is now located, so error
messages will precisely point to it (and again, it is indexed by hie
files)
In the future, the typechecked AST should also retain information about
the splices and the specific desugaring being left to the desugarer.
Also, `runRnSplice` should call `tcUntypedSplice`, otherwise the
typechecking logic is duplicated (see the `QQError` and `QQTopError`
tests for a difference caused by this).
- - - - -
f93798ba by Cheng Shao at 2025-06-13T09:52:35-04:00
libffi: update to 3.5.1
Bumps libffi submodule.
- - - - -
c7aa0c10 by Andreas Klebinger at 2025-06-15T05:47:24-04:00
Revert "Specialise: Don't float out constraint components."
This reverts commit c9abb87ccc0c91cd94f42b3e36270158398326ef.
Turns out two benchmarks from #19747 regresses by a factor of 7-8x if
we do not float those out.
- - - - -
fd998679 by Krzysztof Gogolewski at 2025-06-15T05:48:06-04:00
Fix EPT enforcement when mixing unboxed tuples and non-tuples
The code was assuming that an alternative cannot be returning a normal
datacon and an unboxed tuple at the same time. However, as seen in #26107,
this can happen when using a GADT to refine the representation type.
The solution is just to conservatively return TagDunno.
- - - - -
e64b3f16 by ARATA Mizuki at 2025-06-17T10:13:42+09:00
MachRegs.h: Don't define NO_ARG_REGS when a XMM register is defined
On i386, MAX_REAL_VANILLA_REG is 1, but MAX_REAL_XMM_REG is 4.
If we define NO_ARG_REGS on i386, programs that use SIMD vectors may segfault.
Closes #25985
A couple of notes on the BROKEN_TESTS field:
* This fixes the segfault from T25062_V16.
* The failure from T22187_run was fixed in an earlier commit (see #25561),
but BROKEN_TESTS was missed at that time. Now should be a good time to
mark it fixed.
- - - - -
3e7c6b4d by Matthew Pickering at 2025-06-18T15:34:04-04:00
Improve error messages when implicit lifting fails
This patch concerns programs which automatically try to fix level errors
by inserting `Lift`. For example:
```
foo x = [| x |]
~>
foo x = [| $(lift x) |]
```
Before, there were two problems with the message.
1. (#26031), the location of the error was reported as the whole
quotation.
2. (#26035), the message just mentions there is no Lift instance, but
gives no indicate why the user program needed a Lift instance in the
first place.
This problem is especially bad when you disable
`ImplicitStagePersistence`, so you just end up with a confusing "No
instance for" message rather than an error message about levels
This patch fixes both these issues.
Firstly, `PendingRnSplice` differentiates between a user-written splice
and an implicit lift. Then, the Lift instance is precisely requested
with a specific origin in the typechecker. If the instance fails to be
solved, the message is reported using the `TcRnBadlyLevelled`
constructor (like a normal level error).
Fixes #26031, #26035
- - - - -
44b8cee2 by Cheng Shao at 2025-06-18T15:34:46-04:00
testsuite: add T26120 marked as broken
- - - - -
894a04f3 by Cheng Shao at 2025-06-18T15:34:46-04:00
compiler: fix GHC.SysTools.Ar archive member size writing logic
This patch fixes a long-standing bug in `GHC.SysTools.Ar` that emits
the wrong archive member size in each archive header. It should encode
the exact length of the member payload, excluding any padding byte,
otherwise malformed archive that extracts a broken object with an
extra trailing byte could be created.
Apart from the in-tree `T26120` test, I've also created an out-of-tree
testsuite at https://github.com/TerrorJack/ghc-ar-quickcheck that
contains QuickCheck roundtrip tests for `GHC.SysTools.Ar`. With this
fix, simple roundtrip tests and `writeGNUAr`/GNU `ar` roundtrip test
passes. There might be more bugs lurking in here, but this patch is
still a critical bugfix already.
Fixes #26120 #22586.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
f677ab5f by Lauren Yim at 2025-06-18T15:35:37-04:00
fix some typos in the warnings page in the user guide
- - - - -
b968e1c1 by Rodrigo Mesquita at 2025-06-18T15:36:18-04:00
Add a frozen callstack to throwGhcException
Fixes #25956
- - - - -
a5e0c3a3 by fendor at 2025-06-18T15:36:59-04:00
Update using.rst to advertise full mhu support for GHCi
- - - - -
d3e60e97 by Ryan Scott at 2025-06-18T22:29:21-04:00
Deprecate -Wdata-kinds-tc, make DataKinds issues in typechecker become errors
!11314 introduced the `-Wdata-kinds-tc` warning as part of a fix for #22141.
This was a temporary stopgap measure to allow users who were accidentally
relying on code which needed the `DataKinds` extension in order to typecheck
without having to explicitly enable the extension.
Now that some amount of time has passed, this patch deprecates
`-Wdata-kinds-tc` and upgrades any `DataKinds`-related issues in the
typechecker (which were previously warnings) into errors.
- - - - -
fd5b5177 by Ryan Hendrickson at 2025-06-18T22:30:06-04:00
haddock: Add redact-type-synonyms pragma
`{-# OPTIONS_HADDOCK redact-type-synonyms #-}` pragma will hide the RHS
of type synonyms, and display the result kind instead, if the RHS
contains any unexported types.
- - - - -
fbc0b92a by Vladislav Zavialov at 2025-06-22T04:25:16+03:00
Visible forall in GADTs (#25127)
Add support for visible dependent quantification `forall a -> t` in
types of data constructors, e.g.
data KindVal a where
K :: forall k.
forall (a::k) -> -- now allowed!
k ->
KindVal a
For details, see docs/users_guide/exts/required_type_arguments.rst,
which has gained a new subsection.
DataCon in compiler/GHC/Core/DataCon.hs
---------------------------------------
The main change in this patch is that DataCon, the Core representation
of a data constructor, now uses a different type to store user-written
type variable binders:
- dcUserTyVarBinders :: [InvisTVBinder]
+ dcUserTyVarBinders :: [TyVarBinder]
where
type TyVarBinder = VarBndr TyVar ForAllTyFlag
type InvisTVBinder = VarBndr TyVar Specificity
and
data Specificity = InferredSpec | SpecifiedSpec
data ForAllTyFlag = Invisible Specificity | Required
This change necessitates some boring, mechanical changes scattered
throughout the diff:
... is now used in place of ...
-----------------+---------------
TyVarBinder | InvisTVBinder
IfaceForAllBndr | IfaceForAllSpecBndr
Specified | SpecifiedSpec
Inferred | InferredSpec
mkForAllTys | mkInvisForAllTys
additionally,
tyVarSpecToBinders -- added or removed calls
ifaceForAllSpecToBndrs -- removed calls
Visibility casts in mkDataConRep
--------------------------------
Type abstractions in Core (/\a. e) always have type (forall a. t)
because coreTyLamForAllTyFlag = Specified. This is also true of data
constructor workers. So we may be faced with the following:
data con worker: (forall a. blah)
data con wrapper: (forall a -> blah)
In this case the wrapper must use a visibility cast (e |> ForAllCo ...)
with appropriately set fco_vis{L,R}. Relevant functions:
mkDataConRep in compiler/GHC/Types/Id/Make.hs
dataConUserTyVarBindersNeedWrapper in compiler/GHC/Core/DataCon.hs
mkForAllVisCos in compiler/GHC/Core/Coercion.hs
mkCoreTyLams in compiler/GHC/Core/Make.hs
mkWpForAllCast in compiler/GHC/Tc/Types/Evidence.hs
More specifically:
- dataConUserTyVarBindersNeedWrapper has been updated to answer "yes"
if there are visible foralls in the type of the data constructor.
- mkDataConRep now uses mkCoreTyLams to generate the big lambda
abstractions (/\a b c. e) in the data con wrapper.
- mkCoreTyLams is a variant of mkCoreLams that applies visibility casts
as needed. It similar in purpose to the pre-existing mkWpForAllCast,
so the common bits have been factored out into mkForAllVisCos.
ConDecl in compiler/Language/Haskell/Syntax/Decls.hs
----------------------------------------------------
The surface syntax representation of a data constructor declaration is
ConDecl. In accordance with the proposal, only GADT syntax is extended
with support for visible forall, so we are interested in ConDeclGADT.
ConDeclGADT's field con_bndrs has been renamed to con_outer_bndrs
and is now accompanied by con_inner_bndrs:
con_outer_bndrs :: XRec pass (HsOuterSigTyVarBndrs pass)
con_inner_bndrs :: [HsForAllTelescope pass]
Visible foralls always end up in con_inner_bndrs. The outer binders are
stored and processed separately to support implicit quantification and
the forall-or-nothing rule, a design established by HsSigType.
A side effect of this change is that even in absence of visible foralls,
GHC now permits multiple invisible foralls, e.g.
data T a where { MkT :: forall a b. forall c d. ... -> T a }
But of course, this is done in service of making at least some of these
foralls visible. The entire compiler front-end has been updated to deal
with con_inner_bndrs. See the following modified or added functions:
Parser:
mkGadtDecl in compiler/GHC/Parser/PostProcess.hs
splitLHsGadtTy in compiler/GHC/Hs/Type.hs
Pretty-printer:
pprConDecl in compiler/GHC/Hs/Decls.hs
pprHsForAllTelescope in compiler/GHC/Hs/Type.hs
Renamer:
rnConDecl in compiler/GHC/Rename/Module.hs
bindHsForAllTelescopes in compiler/GHC/Rename/HsType.hs
extractHsForAllTelescopes in compiler/GHC/Rename/HsType.hs
Type checker:
tcConDecl in compiler/GHC/Tc/TyCl.hs
tcGadtConTyVarBndrs in compiler/GHC/Tc/Gen/HsType.hs
Template Haskell
----------------
The TH AST is left unchanged for the moment to avoid breakage. An
attempt to quote or reify a data constructor declaration with visible
forall in its type will result an error:
data ThRejectionReason -- in GHC/HsToCore/Errors/Types.hs
= ...
| ThDataConVisibleForall -- new error constructor
However, as noted in the previous section, GHC now permits multiple
invisible foralls, and TH was updated accordingly. Updated code:
repC in compiler/GHC/HsToCore/Quote.hs
reifyDataCon in compiler/GHC/Tc/Gen/Splice.hs
ppr @Con in libraries/ghc-boot-th/GHC/Boot/TH/Ppr.hs
Pattern matching
----------------
Everything described above concerns data constructor declarations, but
what about their use sites? Now it is trickier to type check a pattern
match fn(Con a b c)=... because we can no longer assume that a,b,c are
all value arguments. Indeed, some or all of them may very well turn out
to be required type arguments.
To that end, see the changes to:
tcDataConPat in compiler/GHC/Tc/Gen/Pat.hs
splitConTyArgs in compiler/GHC/Tc/Gen/Pat.hs
and the new helpers split_con_ty_args, zip_pats_bndrs.
This is also the reason the TcRnTooManyTyArgsInConPattern error
constructor has been removed. The new code emits TcRnArityMismatch
or TcRnIllegalInvisibleTypePattern.
Summary
-------
DataCon, ConDecl, as well as all related functions have been updated to
support required type arguments in data constructors.
Test cases:
HieGadtConSigs GadtConSigs_th_dump1 GadtConSigs_th_pprint1
T25127_data T25127_data_inst T25127_infix
T25127_newtype T25127_fail_th_quote T25127_fail_arity
TyAppPat_Tricky
Co-authored-by: mniip <mniip(a)mniip.com>
- - - - -
ae003a3a by Teo Camarasu at 2025-06-23T05:21:48-04:00
linters: lint-whitespace: bump upper-bound for containers
The version of containers was bumped in https://gitlab.haskell.org/ghc/ghc/-/merge_requests/13989
- - - - -
0fb37893 by Matthew Pickering at 2025-06-23T13:55:10-04:00
Move ModuleGraph into UnitEnv
The ModuleGraph is a piece of information associated with the
ExternalPackageState and HomeUnitGraph. Therefore we should store it
inside the HomeUnitEnv.
- - - - -
3bf6720e by soulomoon at 2025-06-23T13:55:52-04:00
Remove hptAllFamInstances usage during upsweep
Fixes #26118
This change eliminates the use of hptAllFamInstances during the upsweep phase,
as it could access non-below modules from the home package table.
The following updates were made:
* Updated checkFamInstConsistency to accept an explicit ModuleEnv FamInstEnv
parameter and removed the call to hptAllFamInstances.
* Adjusted hugInstancesBelow so we can construct ModuleEnv FamInstEnv
from its result,
* hptAllFamInstances and allFamInstances functions are removed.
- - - - -
83ee7b78 by Ben Gamari at 2025-06-24T05:02:07-04:00
configure: Don't force value of OTOOL, etc. if not present
Previously if `otool` and `install_name_tool` were not present they
would be overridden by `fp_settings.m4`. This logic was introduced in
4ff93292243888545da452ea4d4c1987f2343591 without explanation.
- - - - -
9329c9e1 by Ben Gamari at 2025-06-24T05:02:07-04:00
ghc-toolchain: Add support for otool, install_name_tool
Fixes part of ghc#23675.
- - - - -
25f5c998 by Ben Gamari at 2025-06-24T05:02:08-04:00
ghc-toolchain: Add support for llc, opt, llvm-as
Fixes #23675.
- - - - -
51d150dd by Rodrigo Mesquita at 2025-06-24T05:02:08-04:00
hadrian: Use settings-use-distro-mingw directly
The type `ToolchainSetting` only made sense when we had more settings to
fetch from the system config file. Even then "settings-use-distro-mingw"
is arguably not a toolchain setting.
With the fix for #23675, all toolchain tools were moved to the
`ghc-toolchain` `Toolchain` format. Therefore, we can inline
`settings-use-distro-mingw` accesses and delete `ToolchainSetting`.
- - - - -
dcf68a83 by Rodrigo Mesquita at 2025-06-24T05:02:08-04:00
configure: Check LlvmTarget exists for LlvmAsFlags
If LlvmTarget was empty, LlvmAsFlags would be just "--target=".
If it is empty now, simply keep LlvmAsFlags empty.
ghc-toolchain already does this right. This fix makes the two
configurations match up.
- - - - -
580a3353 by Ben Gamari at 2025-06-24T05:02:51-04:00
rts/linker/LoadArchive: Use bool
Improve type precision by using `bool` instead of `int` and `StgBool`.
- - - - -
76d1041d by Ben Gamari at 2025-06-24T05:02:51-04:00
rts/linker/LoadArchive: Don't rely on file extensions for identification
Previously archive members would be identified via their file extension,
as described in #13103. We now instead use a more principled approach,
relying on the magic number in the member's header.
As well, we refactor treatment of archive format detection to improve
code clarity and error handling.
Closes #13103.
- - - - -
4b748a99 by Teo Camarasu at 2025-06-24T15:31:07-04:00
template-haskell: improve changelog
stable -> more stable, just to clarify that this interface isn't fully stable.
errornously -> mistakenly: I typod this and also let's go for a simpler word
- - - - -
e358e477 by Sylvain Henry at 2025-06-24T15:31:58-04:00
Bump stack resolver to use GHC 9.6.7
Cf #26139
- - - - -
4bf5eb63 by fendor at 2025-06-25T17:05:43-04:00
Teach `:reload` about multiple home units
`:reload` needs to lookup the `ModuleName` and must not assume the given
`ModuleName` is in the current `HomeUnit`.
We add a new utility function which allows us to find a `HomeUnitModule`
instead of a `Module`.
Further, we introduce the `GhciCommandError` type which can be used to
abort the execution of a GHCi command.
This error is caught and printed in a human readable fashion.
- - - - -
b3d97bb3 by fendor at 2025-06-25T17:06:25-04:00
Implement `-fno-load-initial-targets` flag
We add the new flag `-fno-load-initial-targets` which doesn't load all `Target`s
immediately but only computes the module graph for all `Target`s.
The user can then decide to load modules from that module graph using
the syntax:
ghci> :reload <Mod>
This will load everything in the module graph up to `Mod`.
The user can return to the initial state by using the builtin target
`none` to unload all modules.
ghci> :reload none
Is in principle identical to starting a new session with the
`-fno-load-initial-targets` flag.
The `-fno-load-initial-targets` flag allows for faster startup time of GHCi when a
user has lots of `Target`s.
We additionally extend the `:reload` command to accept multiple
`ModuleName`s. For example:
ghci> :reload <Mod1> <Mod2>
Loads all modules up to the modules `Mod1` and `Mod2`.
- - - - -
49f44e52 by Teo Camarasu at 2025-06-26T04:19:51-04:00
Expose ghc-internal unit id through the settings file
This in combination with the unit id of the compiler library allows
cabal to know of the two unit ids that should not be reinstalled (in
specific circumstances) as:
- when using plugins, we want to link against exactly the compiler unit
id
- when using TemplateHaskell we want to link against exactly the package
that contains the TemplateHaskell interfaces, which is `ghc-internal`
See: <https://github.com/haskell/cabal/issues/10087>
Resolves #25282
- - - - -
499c4efe by Bryan Richter at 2025-06-26T04:20:33-04:00
CI: Fix and clean up capture of timings
* Fixes the typo that caused 'cat ci-timings' to report "no such file or
directory"
* Gave ci_timings.txt a file extension so it may play better with other
systems
* Fixed the use of time_it so all times are recorded
* Fixed time_it to print name along with timing
- - - - -
86c90c9e by Bryan Richter at 2025-06-26T04:20:33-04:00
CI: Update collapsible section usage
The syntax apparently changed at some point.
- - - - -
04308ee4 by Bryan Richter at 2025-06-26T04:20:33-04:00
CI: Add more collapsible sections
- - - - -
43b606bb by Florian Ragwitz at 2025-06-27T16:31:26-04:00
Tick uses of wildcard/pun field binds as if using the record selector function
Fixes #17834.
See Note [Record-selector ticks] for additional reasoning behind this as well
as an overview of the implementation details and future improvements.
- - - - -
d4952549 by Ben Gamari at 2025-06-27T16:32:08-04:00
testsuite/caller-cc: Make CallerCc[123] less sensitive
These were previously sensitive to irrelevant changes in program
structure. To avoid this we filter out all by lines emitted by the
-fcaller-cc from the profile.
- - - - -
52cf1518 by Ben Gamari at 2025-07-01T09:16:27-04:00
configure: Drop probing of ld.gold
As noted in #25716, `gold` has been dropped from binutils-2.44.
Fixes #25716.
Metric Increase:
size_hello_artifact_gzip
size_hello_unicode_gzip
ghc_prim_so
- - - - -
699 changed files:
- .gitlab-ci.yml
- .gitlab/ci.sh
- .gitlab/common.sh
- .gitlab/generate-ci/gen_ci.hs
- .gitlab/jobs.yaml
- compiler/GHC.hs
- compiler/GHC/Builtin/Names/TH.hs
- compiler/GHC/Builtin/Types.hs
- compiler/GHC/Builtin/primops.txt.pp
- compiler/GHC/ByteCode/Asm.hs
- compiler/GHC/ByteCode/InfoTable.hs
- compiler/GHC/ByteCode/Instr.hs
- compiler/GHC/ByteCode/Linker.hs
- compiler/GHC/ByteCode/Types.hs
- compiler/GHC/CmmToAsm/AArch64/CodeGen.hs
- compiler/GHC/CmmToAsm/LA64.hs
- compiler/GHC/CmmToAsm/LA64/CodeGen.hs
- compiler/GHC/CmmToAsm/LA64/Instr.hs
- compiler/GHC/CmmToAsm/LA64/Ppr.hs
- compiler/GHC/CmmToAsm/X86/CodeGen.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/ConLike.hs
- compiler/GHC/Core/DataCon.hs
- compiler/GHC/Core/DataCon.hs-boot
- compiler/GHC/Core/Make.hs
- compiler/GHC/Core/Opt/Pipeline.hs
- compiler/GHC/Core/PatSyn.hs
- compiler/GHC/Core/Predicate.hs
- compiler/GHC/Core/TyCo/Ppr.hs
- compiler/GHC/Core/TyCo/Rep.hs
- compiler/GHC/Core/TyCo/Tidy.hs
- compiler/GHC/Driver/Backpack.hs
- compiler/GHC/Driver/Downsweep.hs
- compiler/GHC/Driver/DynFlags.hs
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- − testsuite/tests/typecheck/should_compile/T22141a.stderr
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- testsuite/tests/typecheck/should_fail/T20443b.stderr
- − testsuite/tests/typecheck/should_fail/T20873c.hs
- − testsuite/tests/typecheck/should_fail/T20873c.stderr
- testsuite/tests/typecheck/should_compile/T22141a.hs → testsuite/tests/typecheck/should_fail/T22141a.hs
- testsuite/tests/typecheck/should_fail/T22141a.stderr
- testsuite/tests/typecheck/should_compile/T22141b.hs → testsuite/tests/typecheck/should_fail/T22141b.hs
- testsuite/tests/typecheck/should_fail/T22141b.stderr
- testsuite/tests/typecheck/should_compile/T22141c.hs → testsuite/tests/typecheck/should_fail/T22141c.hs
- testsuite/tests/typecheck/should_fail/T22141c.stderr
- testsuite/tests/typecheck/should_compile/T22141d.hs → testsuite/tests/typecheck/should_fail/T22141d.hs
- testsuite/tests/typecheck/should_fail/T22141d.stderr
- testsuite/tests/typecheck/should_compile/T22141e.hs → testsuite/tests/typecheck/should_fail/T22141e.hs
- testsuite/tests/typecheck/should_fail/T22141e.stderr
- testsuite/tests/typecheck/should_compile/T22141e_Aux.hs → testsuite/tests/typecheck/should_fail/T22141e_Aux.hs
- + testsuite/tests/typecheck/should_fail/T25950.hs
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- testsuite/tests/typecheck/should_fail/tcfail097.stderr
- + testsuite/tests/vdq-rta/should_compile/T25127_data.hs
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- testsuite/tests/vdq-rta/should_compile/all.T
- testsuite/tests/vdq-rta/should_fail/T23739_fail_case.hs
- testsuite/tests/vdq-rta/should_fail/T23739_fail_case.stderr
- testsuite/tests/vdq-rta/should_fail/T24159_type_syntax_th_fail.script
- + testsuite/tests/vdq-rta/should_fail/T25127_fail_arity.hs
- + testsuite/tests/vdq-rta/should_fail/T25127_fail_arity.stderr
- + testsuite/tests/vdq-rta/should_fail/T25127_fail_th_quote.hs
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- testsuite/tests/warnings/should_compile/DataToTagWarnings.hs
- testsuite/tests/warnings/should_compile/T14794a.hs
- testsuite/tests/warnings/should_compile/T14794a.stderr
- testsuite/tests/warnings/should_compile/T14794b.hs
- testsuite/tests/warnings/should_compile/T14794b.stderr
- testsuite/tests/warnings/should_compile/T14794c.hs
- testsuite/tests/warnings/should_compile/T14794c.stderr
- testsuite/tests/warnings/should_compile/T14794d.hs
- testsuite/tests/warnings/should_compile/T14794d.stderr
- testsuite/tests/warnings/should_compile/T14794e.hs
- testsuite/tests/warnings/should_compile/T14794e.stderr
- testsuite/tests/warnings/should_compile/T14794f.hs
- testsuite/tests/warnings/should_compile/T14794f.stderr
- testsuite/tests/wcompat-warnings/Template.hs
- + testsuite/tests/wcompat-warnings/WCompatWarningsOn.stderr
- utils/check-exact/ExactPrint.hs
- utils/genprimopcode/Main.hs
- utils/genprimopcode/Syntax.hs
- utils/ghc-toolchain/exe/Main.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Target.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Tools/Link.hs
- utils/haddock/CHANGES.md
- utils/haddock/doc/cheatsheet/haddocks.md
- utils/haddock/doc/markup.rst
- utils/haddock/haddock-api/resources/html/Linuwial.std-theme/linuwial.css
- 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/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.hs
- utils/haddock/haddock-api/src/Haddock/Interface/AttachInstances.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Create.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/InterfaceFile.hs
- utils/haddock/haddock-api/src/Haddock/Types.hs
- utils/haddock/haddock-library/haddock-library.cabal
- utils/haddock/haddock-library/src/Documentation/Haddock/Parser.hs
- utils/haddock/haddock-library/test/Documentation/Haddock/ParserSpec.hs
- utils/haddock/html-test/ref/Bug1004.html
- utils/haddock/html-test/ref/Bug548.html
- utils/haddock/html-test/ref/Bug973.html
- utils/haddock/html-test/ref/Hash.html
- utils/haddock/html-test/ref/ImplicitParams.html
- utils/haddock/html-test/ref/Instances.html
- utils/haddock/html-test/ref/PatternSyns.html
- + utils/haddock/html-test/ref/RedactTypeSynonyms.html
- utils/haddock/html-test/ref/TypeOperators.html
- + utils/haddock/html-test/src/RedactTypeSynonyms.hs
- utils/haddock/html-test/src/TypeOperators.hs
- utils/haddock/hypsrc-test/ref/src/Quasiquoter.html
- + utils/haddock/latex-test/ref/RedactTypeSynonyms/RedactTypeSynonyms.tex
- + utils/haddock/latex-test/src/RedactTypeSynonyms/RedactTypeSynonyms.hs
- utils/hpc
- utils/hsc2hs
- utils/iserv/iserv.cabal.in
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/20d215863e7e7da36aa03252e40a75…
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[Git][ghc/ghc][wip/andreask/overloaded_calls] Disable -fprof-late-overloaded-calls for join points.
by Andreas Klebinger (＠AndreasK) 01 Jul '25
by Andreas Klebinger (＠AndreasK) 01 Jul '25
01 Jul '25
Andreas Klebinger pushed to branch wip/andreask/overloaded_calls at Glasgow Haskell Compiler / GHC
Commits:
d8c22402 by Andreas Klebinger at 2025-07-01T11:41:50+02:00
Disable -fprof-late-overloaded-calls for join points.
Currently GHC considers cost centres as destructive to
join contexts. Or in other words this is not considered valid:
join f x = ...
in
... -> scc<tick> jmp
This makes the functionality of `-fprof-late-overloaded-calls` not feasible
for join points in general. We used to try to work around this by putting the
ticks on the rhs of the join point rather than around the jump. However beyond
the loss of accuracy this was broken for recursive join points as we ended up
with something like:
rec-join f x = scc<tick> ... jmp f x
Which similarly is not valid as the tick once again destroys the tail call.
One might think we could limit ourselves to non-recursive tail calls and do
something clever like:
join f x = scc<tick> ...
in ... jmp f x
And sometimes this works! But sometimes the full rhs would look something like:
join g x = ....
join f x = scc<tick> ... -> jmp g x
Which, would again no longer be valid. I believe in the long run we can make
cost centre ticks non-destructive to join points. Or we could keep track of
where we are/are not allowed to insert a cost centre. But in the short term I will
simply disable the annotation of join calls under this flag.
- - - - -
2 changed files:
- compiler/GHC/Core/LateCC/OverloadedCalls.hs
- docs/users_guide/profiling.rst
Changes:
=====================================
compiler/GHC/Core/LateCC/OverloadedCalls.hs
=====================================
@@ -20,7 +20,6 @@ import GHC.Core.Make
import GHC.Core.Predicate
import GHC.Core.Type
import GHC.Core.Utils
-import GHC.Tc.Utils.TcType
import GHC.Types.Id
import GHC.Types.Name
import GHC.Types.SrcLoc
@@ -29,6 +28,41 @@ import GHC.Types.Var
type OverloadedCallsCCState = Strict.Maybe SrcSpan
+{- Note [Overloaded Calls and join points]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Currently GHC considers cost centres as destructive to
+join contexts. Or in other words this is not considered valid:
+
+ join f x = ...
+ in
+ ... -> scc<tick> jmp
+
+This makes the functionality of `-fprof-late-overloaded-calls` not feasible
+for join points in general. We used to try to work around this by putting the
+ticks on the rhs of the join point rather than around the jump. However beyond
+the loss of accuracy this was broken for recursive join points as we ended up
+with something like:
+
+ rec-join f x = scc<tick> ... jmp f x
+
+Which similarly is not valid as the tick once again destroys the tail call.
+One might think we could limit ourselves to non-recursive tail calls and do
+something clever like:
+
+ join f x = scc<tick> ...
+ in ... jmp f x
+
+And sometimes this works! But sometimes the full rhs would look something like:
+
+ join g x = ....
+ join f x = scc<tick> ... -> jmp g x
+
+Which, would again no longer be valid. I believe in the long run we can make
+cost centre ticks non-destructive to join points. Or we could keep track of
+where we are/are not allowed to insert a cost centre. But in the short term I will
+simply disable the annotation of join calls under this flag.
+-}
+
-- | Insert cost centres on function applications with dictionary arguments. The
-- source locations attached to the cost centres is approximated based on the
-- "closest" source note encountered in the traversal.
@@ -52,21 +86,10 @@ overloadedCallsCC =
CoreBndr
-> LateCCM OverloadedCallsCCState CoreExpr
-> LateCCM OverloadedCallsCCState CoreExpr
- wrap_if_join b pexpr = do
+ wrap_if_join _b pexpr = do
+ -- See Note [Overloaded Calls and join points]
expr <- pexpr
- if isJoinId b && isOverloadedTy (exprType expr) then do
- let
- cc_name :: FastString
- cc_name = fsLit "join-rhs-" `appendFS` getOccFS b
-
- cc_srcspan <-
- fmap (Strict.fromMaybe (UnhelpfulSpan UnhelpfulNoLocationInfo)) $
- lift $ gets lateCCState_extra
-
- insertCC cc_name cc_srcspan expr
- else
- return expr
-
+ return expr
processExpr :: CoreExpr -> LateCCM OverloadedCallsCCState CoreExpr
processExpr expr =
@@ -99,6 +122,7 @@ overloadedCallsCC =
-- Avoid instrumenting join points.
-- (See comment in processBind above)
+ -- Also see Note [Overloaded Calls and join points]
&& not (isJoinVarExpr f)
then do
-- Extract a name and source location from the function being
=====================================
docs/users_guide/profiling.rst
=====================================
@@ -571,9 +571,7 @@ of your profiled program will be different to that of the unprofiled one.
Some overloaded calls may not be annotated, specifically in cases where the
optimizer turns an overloaded function into a join point. Calls to such
functions will not be wrapped in ``SCC`` annotations, since it would make
- them non-tail calls, which is a requirement for join points. Instead,
- ``SCC`` annotations are added around the body of overloaded join variables
- and given distinct names (``join-rhs-<var>``) to avoid confusion.
+ them non-tail calls, which is a requirement for join points.
.. ghc-flag:: -fprof-cafs
:shortdesc: Auto-add ``SCC``\\ s to all CAFs
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/d8c22402fe5bb986abb15250772e1b5…
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[Git][ghc/ghc][wip/romes/26039] Bump default language edition to GHC2024
by Rodrigo Mesquita (＠alt-romes) 01 Jul '25
by Rodrigo Mesquita (＠alt-romes) 01 Jul '25
01 Jul '25
Rodrigo Mesquita pushed to branch wip/romes/26039 at Glasgow Haskell Compiler / GHC
Commits:
dca20032 by Rodrigo Mesquita at 2025-07-01T09:43:35+01:00
Bump default language edition to GHC2024
As per the accepted ghc-proposal#632
Fixes #26039
- - - - -
42 changed files:
- compiler/GHC/Driver/Flags.hs
- testsuite/tests/ado/all.T
- testsuite/tests/annotations/should_fail/all.T
- testsuite/tests/array/should_run/all.T
- testsuite/tests/core-to-stg/all.T
- testsuite/tests/deSugar/should_fail/all.T
- testsuite/tests/deriving/should_compile/all.T
- testsuite/tests/deriving/should_fail/all.T
- testsuite/tests/dmdanal/sigs/all.T
- testsuite/tests/gadt/all.T
- testsuite/tests/ghci.debugger/scripts/all.T
- testsuite/tests/ghci/prog-mhu002/all.T
- testsuite/tests/ghci/scripts/Makefile
- testsuite/tests/ghci/should_run/all.T
- testsuite/tests/indexed-types/should_compile/all.T
- testsuite/tests/linear/should_fail/all.T
- testsuite/tests/module/all.T
- testsuite/tests/overloadedrecflds/should_fail/all.T
- testsuite/tests/parser/should_fail/all.T
- testsuite/tests/partial-sigs/should_compile/all.T
- testsuite/tests/polykinds/all.T
- testsuite/tests/programs/andy_cherry/test.T
- testsuite/tests/rename/should_fail/all.T
- testsuite/tests/roles/should_fail/all.T
- testsuite/tests/showIface/DocsInHiFile1.stdout
- testsuite/tests/showIface/DocsInHiFileTH.stdout
- testsuite/tests/showIface/HaddockIssue849.stdout
- testsuite/tests/showIface/HaddockOpts.stdout
- testsuite/tests/showIface/HaddockSpanIssueT24378.stdout
- testsuite/tests/showIface/MagicHashInHaddocks.stdout
- testsuite/tests/showIface/Makefile
- testsuite/tests/showIface/NoExportList.stdout
- testsuite/tests/showIface/PragmaDocs.stdout
- testsuite/tests/showIface/ReExports.stdout
- testsuite/tests/simplCore/T9646/test.T
- testsuite/tests/simplCore/should_compile/all.T
- testsuite/tests/th/all.T
- testsuite/tests/typecheck/should_compile/all.T
- testsuite/tests/typecheck/should_fail/all.T
- testsuite/tests/typecheck/should_run/all.T
- testsuite/tests/vdq-rta/should_fail/all.T
- testsuite/tests/warnings/should_fail/all.T
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