[Git][ghc/ghc][wip/T18570] 2 commits: Fix hole fits
by Sjoerd Visscher (＠trac-sjoerd_visscher) 25 Jun '25
by Sjoerd Visscher (＠trac-sjoerd_visscher) 25 Jun '25
25 Jun '25
Sjoerd Visscher pushed to branch wip/T18570 at Glasgow Haskell Compiler / GHC
Commits:
7e05307b by Sjoerd Visscher at 2025-06-25T17:26:38+02:00
Fix hole fits
- - - - -
4876d312 by Sjoerd Visscher at 2025-06-25T17:31:27+02:00
Remove check for LinearTypes extension
- - - - -
7 changed files:
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/TyCl/PatSyn.hs
- compiler/GHC/Tc/TyCl/Utils.hs
- testsuite/tests/overloadedrecflds/should_run/overloadedrecfldsrun04.stdout
- testsuite/tests/simplCore/should_compile/OpaqueNoCastWW.stderr
- testsuite/tests/typecheck/should_fail/CommonFieldTypeMismatch.stderr
- utils/haddock/html-test/ref/Bug294.html
Changes:
=====================================
compiler/GHC/Tc/Errors/Ppr.hs
=====================================
@@ -3541,12 +3541,12 @@ pprHoleFit :: HoleFitDispConfig -> HoleFit -> SDoc
pprHoleFit _ (RawHoleFit sd) = sd
pprHoleFit (HFDC sWrp sWrpVars sTy sProv sMs) (TcHoleFit (HoleFit {..})) =
hang display 2 provenance
- where tyApp = sep $ zipWithEqual pprArg vars hfWrap
+ where tyApps = concat $ zipWithEqual pprArg vars hfWrap
where pprArg b arg = case binderFlag b of
- Specified -> text "@" <> pprParendType arg
+ Specified -> [text "@" <> pprParendType arg]
-- Do not print type application for inferred
-- variables (#16456)
- Inferred -> empty
+ Inferred -> []
Required -> pprPanic "pprHoleFit: bad Required"
(ppr b <+> ppr arg)
tyAppVars = sep $ punctuate comma $
@@ -3573,9 +3573,9 @@ pprHoleFit (HFDC sWrp sWrpVars sTy sProv sMs) (TcHoleFit (HoleFit {..})) =
IdHFCand id_ -> pprPrefixOcc id_
tyDisp = ppWhen sTy $ dcolon <+> ppr hfType
has = not . null
- wrapDisp = ppWhen (has hfWrap && (sWrp || sWrpVars))
+ wrapDisp = ppWhen (has tyApps && (sWrp || sWrpVars))
$ text "with" <+> if sWrp || not sTy
- then occDisp <+> tyApp
+ then occDisp <+> sep tyApps
else tyAppVars
docs = case hfDoc of
Just d -> pprHsDocStrings d
=====================================
compiler/GHC/Tc/TyCl/PatSyn.hs
=====================================
@@ -841,7 +841,7 @@ mkPatSynRecSelBinds :: PatSyn
-> FieldSelectors
-> [(Id, LHsBind GhcRn)]
mkPatSynRecSelBinds ps fields has_sel
- = [ mkOneRecordSelector False [PatSynCon ps] (RecSelPatSyn ps) fld_lbl has_sel
+ = [ mkOneRecordSelector [PatSynCon ps] (RecSelPatSyn ps) fld_lbl has_sel
| fld_lbl <- fields ]
isUnidirectional :: HsPatSynDir a -> Bool
=====================================
compiler/GHC/Tc/TyCl/Utils.hs
=====================================
@@ -766,8 +766,7 @@ addTyConsToGblEnv tyclss
do { traceTc "tcAddTyCons" $ vcat
[ text "tycons" <+> ppr tyclss
, text "implicits" <+> ppr implicit_things ]
- ; linearEnabled <- xoptM LangExt.LinearTypes
- ; gbl_env <- tcRecSelBinds (mkRecSelBinds linearEnabled tyclss)
+ ; gbl_env <- tcRecSelBinds (mkRecSelBinds tyclss)
; th_bndrs <- tcTyThBinders implicit_things
; return (gbl_env, th_bndrs)
}
@@ -850,24 +849,24 @@ tcRecSelBinds sel_bind_prs
, let loc = getSrcSpan sel_id ]
binds = [(NonRecursive, [bind]) | (_, bind) <- sel_bind_prs]
-mkRecSelBinds :: Bool -> [TyCon] -> [(Id, LHsBind GhcRn)]
+mkRecSelBinds :: [TyCon] -> [(Id, LHsBind GhcRn)]
-- NB We produce *un-typechecked* bindings, rather like 'deriving'
-- This makes life easier, because the later type checking will add
-- all necessary type abstractions and applications
-mkRecSelBinds allowMultiplicity tycons
- = [ mkRecSelBind allowMultiplicity tc fld | tc <- tycons
- , fld <- tyConFieldLabels tc ]
+mkRecSelBinds tycons
+ = [ mkRecSelBind tc fld | tc <- tycons
+ , fld <- tyConFieldLabels tc ]
-mkRecSelBind :: Bool -> TyCon -> FieldLabel -> (Id, LHsBind GhcRn)
-mkRecSelBind allowMultiplicity tycon fl
- = mkOneRecordSelector allowMultiplicity all_cons (RecSelData tycon) fl
+mkRecSelBind :: TyCon -> FieldLabel -> (Id, LHsBind GhcRn)
+mkRecSelBind tycon fl
+ = mkOneRecordSelector all_cons (RecSelData tycon) fl
FieldSelectors -- See Note [NoFieldSelectors and naughty record selectors]
where
all_cons = map RealDataCon (tyConDataCons tycon)
-mkOneRecordSelector :: Bool -> [ConLike] -> RecSelParent -> FieldLabel -> FieldSelectors
+mkOneRecordSelector :: [ConLike] -> RecSelParent -> FieldLabel -> FieldSelectors
-> (Id, LHsBind GhcRn)
-mkOneRecordSelector allowMultiplicity all_cons idDetails fl has_sel
+mkOneRecordSelector all_cons idDetails fl has_sel
= (sel_id, L (noAnnSrcSpan loc) sel_bind)
where
loc = getSrcSpan sel_name
@@ -932,7 +931,7 @@ mkOneRecordSelector allowMultiplicity all_cons idDetails fl has_sel
mkVisFunTy sel_mult data_ty $
field_ty
non_partial = length all_cons == length cons_w_field -- See Note [Multiplicity and partial selectors]
- (mult_tvb, sel_mult) = if allowMultiplicity && non_partial && all_other_fields_unrestricted
+ (mult_tvb, sel_mult) = if non_partial && all_other_fields_unrestricted
then ([mkForAllTyBinder (Invisible InferredSpec) mult_var], mkTyVarTy mult_var)
else ([], manyDataConTy)
mult_var = mkTyVar (mkSysTvName (mkBuiltinUnique 1) (fsLit "m")) multiplicityTy
=====================================
testsuite/tests/overloadedrecflds/should_run/overloadedrecfldsrun04.stdout
=====================================
@@ -1,5 +1,8 @@
data Main.R = Main.MkR {Main.foo :: GHC.Internal.Types.Int}
-Main.foo :: Main.R -> GHC.Internal.Types.Int
-Main.foo :: Main.R -> GHC.Internal.Types.Int
-Main.foo :: Main.R -> GHC.Internal.Types.Int
+Main.foo :: forall {m_0 :: GHC.Internal.Types.Multiplicity} .
+ Main.R %m_0 -> GHC.Internal.Types.Int
+Main.foo :: forall {m_0 :: GHC.Internal.Types.Multiplicity} .
+ Main.R %m_0 -> GHC.Internal.Types.Int
+Main.foo :: forall {m_0 :: GHC.Internal.Types.Multiplicity} .
+ Main.R %m_0 -> GHC.Internal.Types.Int
42
=====================================
testsuite/tests/simplCore/should_compile/OpaqueNoCastWW.stderr
=====================================
@@ -1,22 +1,32 @@
==================== Tidy Core ====================
Result size of Tidy Core
- = {terms: 82, types: 52, coercions: 29, joins: 0/0}
+ = {terms: 83, types: 55, coercions: 31, joins: 0/0}
--- RHS size: {terms: 3, types: 3, coercions: 0, joins: 0/0}
-unsafeToInteger1 :: forall (n :: Nat). Signed n -> Signed n
+-- RHS size: {terms: 4, types: 4, coercions: 0, joins: 0/0}
+unsafeToInteger1
+ :: forall (n :: Nat) (m :: GHC.Internal.Types.Multiplicity).
+ Signed n %m -> Signed n
[GblId, Arity=1, Unf=OtherCon []]
-unsafeToInteger1 = \ (@(n :: Nat)) (ds :: Signed n) -> ds
+unsafeToInteger1
+ = \ (@(n :: Nat))
+ (@(m :: GHC.Internal.Types.Multiplicity))
+ (ds :: Signed n) ->
+ ds
--- RHS size: {terms: 1, types: 0, coercions: 8, joins: 0/0}
-unsafeToInteger :: forall (n :: Nat). Signed n -> Integer
+-- RHS size: {terms: 1, types: 0, coercions: 10, joins: 0/0}
+unsafeToInteger
+ :: forall (n :: Nat) {m :: GHC.Internal.Types.Multiplicity}.
+ Signed n %m -> Integer
[GblId[[RecSel]], Arity=1, Unf=OtherCon []]
unsafeToInteger
= unsafeToInteger1
- `cast` (forall (n :: <Nat>_N).
- <Signed n>_R %<Many>_N ->_R OpaqueNoCastWW.N:Signed <n>_P
- :: (forall (n :: Nat). Signed n -> Signed n)
- ~R# (forall (n :: Nat). Signed n -> Integer))
+ `cast` (forall (n :: <Nat>_N) (m :: <GHC.Internal.Types.Multiplicity>_N).
+ <Signed n>_R %<m>_N ->_R OpaqueNoCastWW.N:Signed <n>_P
+ :: (forall (n :: Nat) (m :: GHC.Internal.Types.Multiplicity).
+ Signed n %m -> Signed n)
+ ~R# (forall (n :: Nat) (m :: GHC.Internal.Types.Multiplicity).
+ Signed n %m -> Integer))
-- RHS size: {terms: 8, types: 7, coercions: 21, joins: 0/0}
times [InlPrag=OPAQUE]
=====================================
testsuite/tests/typecheck/should_fail/CommonFieldTypeMismatch.stderr
=====================================
@@ -1,3 +1,11 @@
-CommonFieldTypeMismatch.hs:3:1: [GHC-91827]
- Constructors A1 and A2 give different types for field ‘fld’
- In the data type declaration for ‘A’
+CommonFieldTypeMismatch.hs:3:1: error: [GHC-91827]
+ • Constructors A1 and A2 give different types for field ‘fld’
+ • In the data type declaration for ‘A’
+
+CommonFieldTypeMismatch.hs:4:8: error: [GHC-83865]
+ • Couldn't match type ‘[Char]’ with ‘Int’
+ Expected: Int
+ Actual: String
+ • In the expression: fld
+ In an equation for ‘fld’: fld A2 {fld = fld} = fld
+
=====================================
utils/haddock/html-test/ref/Bug294.html
=====================================
@@ -159,9 +159,13 @@
><p class="src"
><a id="v:problemField" class="def"
>problemField</a
- > :: TO <a href="#" title="Bug294"
+ > :: <span class="keyword"
+ >forall</span
+ > {m :: <a href="#" title="GHC.Exts"
+ >Multiplicity</a
+ >}. TO <a href="#" title="Bug294"
>A</a
- > -> <a href="#" title="Bug294"
+ > %m -> <a href="#" title="Bug294"
>A</a
> <a href="#" class="selflink"
>#</a
@@ -171,9 +175,13 @@
><p class="src"
><a id="v:problemField-39-" class="def"
>problemField'</a
- > :: DO <a href="#" title="Bug294"
+ > :: <span class="keyword"
+ >forall</span
+ > {m :: <a href="#" title="GHC.Exts"
+ >Multiplicity</a
+ >}. DO <a href="#" title="Bug294"
>A</a
- > -> <a href="#" title="Bug294"
+ > %m -> <a href="#" title="Bug294"
>A</a
> <a href="#" class="selflink"
>#</a
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/4104fade70e76afdfb109d68e2819c…
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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 4 commits: template-haskell: improve changelog
by Marge Bot (＠marge-bot) 25 Jun '25
by Marge Bot (＠marge-bot) 25 Jun '25
25 Jun '25
Marge Bot pushed to branch wip/marge_bot_batch_merge_job 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
- - - - -
bd51bc0e by fendor at 2025-06-25T11:25:23-04:00
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.
- - - - -
7889cc86 by fendor at 2025-06-25T11:25:23-04:00
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`.
- - - - -
45 changed files:
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Unit/Module/Graph.hs
- docs/users_guide/ghci.rst
- ghc/GHCi/UI.hs
- ghc/GHCi/UI/Exception.hs
- ghc/GHCi/UI/Print.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
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/8a3251665c810b0fb0c7d0d964c08e…
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Simon Peyton Jones pushed to branch wip/T26115 at Glasgow Haskell Compiler / GHC
Commits:
592bf1aa by Simon Peyton Jones at 2025-06-25T15:37:39+01:00
More improvements
- - - - -
12 changed files:
- compiler/GHC/HsToCore/Binds.hs
- compiler/GHC/Tc/Gen/Sig.hs
- compiler/GHC/Tc/Solver.hs
- compiler/GHC/Tc/Solver/Default.hs
- compiler/GHC/Tc/Solver/Dict.hs
- compiler/GHC/Tc/Solver/InertSet.hs
- compiler/GHC/Tc/Solver/Monad.hs
- compiler/GHC/Tc/Solver/Solve.hs
- compiler/GHC/Tc/Solver/Solve.hs-boot
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Zonk/Type.hs
- testsuite/tests/typecheck/should_compile/T23171.hs
Changes:
=====================================
compiler/GHC/HsToCore/Binds.hs
=====================================
@@ -1896,10 +1896,10 @@ dsEvTerm (EvExpr e) = return e
dsEvTerm (EvTypeable ty ev) = dsEvTypeable ty ev
dsEvTerm (EvFun { et_tvs = tvs, et_given = given
, et_binds = ev_binds, et_body = wanted_id })
- = do { dsTcEvBinds ev_binds $ \ds_ev_binds -> do
- { return $ (mkLams (tvs ++ given) $
+ = do { dsEvBinds ev_binds $ \ds_ev_binds ->
+ return $ (mkLams (tvs ++ given) $
mkCoreLets ds_ev_binds $
- Var wanted_id) } }
+ Var wanted_id) }
{-**********************************************************************
=====================================
compiler/GHC/Tc/Gen/Sig.hs
=====================================
@@ -39,7 +39,7 @@ import GHC.Tc.Gen.HsType
import GHC.Tc.Solver( reportUnsolvedEqualities, pushLevelAndSolveEqualitiesX
, emitResidualConstraints )
import GHC.Tc.Solver.Solve( solveWanteds )
-import GHC.Tc.Solver.Monad( runTcS, runTcSSpecPrag )
+import GHC.Tc.Solver.Monad( runTcS, runTcSWithEvBinds )
import GHC.Tc.Validity ( checkValidType )
import GHC.Tc.Utils.Monad
@@ -1042,7 +1042,7 @@ tcSpecPrag poly_id (SpecSigE nm rule_bndrs spec_e inl)
-- (2) Solve the resulting wanteds in TcSSpecPrag mode.
; ev_binds_var <- newTcEvBinds
; spec_e_wanted <- setTcLevel rhs_tclvl $
- runTcSSpecPrag ev_binds_var $
+ runTcSWithEvBinds ev_binds_var $
solveWanteds spec_e_wanted
; spec_e_wanted <- liftZonkM $ zonkWC spec_e_wanted
=====================================
compiler/GHC/Tc/Solver.hs
=====================================
@@ -1036,8 +1036,7 @@ findInferredDiff annotated_theta inferred_theta
-- See `Note [Quantification and partial signatures]` Wrinkle 2
; return (map (box_pred . ctPred) $
- bagToList $
- wc_simple residual) }
+ bagToList residual) }
where
box_pred :: PredType -> PredType
box_pred pred = case classifyPredType pred of
=====================================
compiler/GHC/Tc/Solver/Default.hs
=====================================
@@ -1188,8 +1188,8 @@ tryDefaultGroup wanteds (Proposal assignments)
; new_wanteds <- sequence [ new_wtd_ct wtd
| CtWanted wtd <- map ctEvidence wanteds
]
- ; residual_wc <- solveSimpleWanteds (listToBag new_wanteds)
- ; return $ if isEmptyWC residual_wc then Just (tvs, subst) else Nothing }
+ ; residual <- solveSimpleWanteds (listToBag new_wanteds)
+ ; return $ if isEmptyBag residual then Just (tvs, subst) else Nothing }
| otherwise
= return Nothing
=====================================
compiler/GHC/Tc/Solver/Dict.hs
=====================================
@@ -702,10 +702,10 @@ tryInertDicts :: DictCt -> SolverStage ()
tryInertDicts dict_ct
= Stage $ do { inerts <- getInertCans
; mode <- getTcSMode
- -- In TcSSpecPrag mode we do not look at Givens; that's the point
+ -- In TcSShortCut mode we do not look at Givens; that's the point
-- Looking at Wanteds would be OK but no real benefit
; case mode of
- TcSSpecPrag -> continueWith ()
+ TcSShortCut -> continueWith ()
_other -> try_inert_dicts inerts dict_ct }
try_inert_dicts :: InertCans -> DictCt -> TcS (StopOrContinue ())
@@ -774,9 +774,9 @@ tryShortCutSolver try_short_cut dict_w@(DictCt { di_ev = ev_w })
-> tryTcS $ -- tryTcS tries to completely solve some contraints
-- Inherit the current solved_dicts, so that one invocation of
-- tryShortCutSolver can benefit from the work of earlier invocations
- setTcSMode TcSSpecPrag $
- do { wc <- solveSimpleWanteds (unitBag (CDictCan dict_w))
- ; return (isSolvedWC wc) }
+ setTcSMode TcSShortCut $
+ do { residual <- solveSimpleWanteds (unitBag (CDictCan dict_w))
+ ; return (isEmptyBag residual) }
| otherwise
-> return False }
=====================================
compiler/GHC/Tc/Solver/InertSet.hs
=====================================
@@ -11,7 +11,6 @@ module GHC.Tc.Solver.InertSet (
extendWorkListEq, extendWorkListChildEqs,
extendWorkListRewrittenEqs,
appendWorkList,
- extendWorkListImplic, extendWorkListImplics,
workListSize,
-- * The inert set
@@ -155,17 +154,6 @@ So we arrange to put these particular class constraints in the wl_eqs.
NB: since we do not currently apply the substitution to the
inert_solved_dicts, the knot-tying still seems a bit fragile.
But this makes it better.
-
-Note [Residual implications]
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-The wl_implics in the WorkList are the residual implication
-constraints that are generated while solving or canonicalising the
-current worklist. Specifically, when canonicalising
- (forall a. t1 ~ forall a. t2)
-from which we get the implication
- (forall a. t1 ~ t2)
-See GHC.Tc.Solver.Monad.deferTcSForAllEq
-
-}
-- See Note [WorkList priorities]
@@ -187,8 +175,6 @@ data WorkList
-- in GHC.Tc.Types.Constraint for more details.
, wl_rest :: [Ct]
-
- , wl_implics :: Bag Implication -- See Note [Residual implications]
}
isNominalEqualityCt :: Ct -> Bool
@@ -203,15 +189,12 @@ isNominalEqualityCt ct
appendWorkList :: WorkList -> WorkList -> WorkList
appendWorkList
- (WL { wl_eqs_N = eqs1_N, wl_eqs_X = eqs1_X, wl_rw_eqs = rw_eqs1
- , wl_rest = rest1, wl_implics = implics1 })
- (WL { wl_eqs_N = eqs2_N, wl_eqs_X = eqs2_X, wl_rw_eqs = rw_eqs2
- , wl_rest = rest2, wl_implics = implics2 })
+ (WL { wl_eqs_N = eqs1_N, wl_eqs_X = eqs1_X, wl_rw_eqs = rw_eqs1, wl_rest = rest1 })
+ (WL { wl_eqs_N = eqs2_N, wl_eqs_X = eqs2_X, wl_rw_eqs = rw_eqs2, wl_rest = rest2 })
= WL { wl_eqs_N = eqs1_N ++ eqs2_N
, wl_eqs_X = eqs1_X ++ eqs2_X
, wl_rw_eqs = rw_eqs1 ++ rw_eqs2
- , wl_rest = rest1 ++ rest2
- , wl_implics = implics1 `unionBags` implics2 }
+ , wl_rest = rest1 ++ rest2 }
workListSize :: WorkList -> Int
workListSize (WL { wl_eqs_N = eqs_N, wl_eqs_X = eqs_X, wl_rw_eqs = rw_eqs, wl_rest = rest })
@@ -269,12 +252,6 @@ extendWorkListNonEq :: Ct -> WorkList -> WorkList
-- Extension by non equality
extendWorkListNonEq ct wl = wl { wl_rest = ct : wl_rest wl }
-extendWorkListImplic :: Implication -> WorkList -> WorkList
-extendWorkListImplic implic wl = wl { wl_implics = implic `consBag` wl_implics wl }
-
-extendWorkListImplics :: Bag Implication -> WorkList -> WorkList
-extendWorkListImplics implics wl = wl { wl_implics = implics `unionBags` wl_implics wl }
-
extendWorkListCt :: Ct -> WorkList -> WorkList
-- Agnostic about what kind of constraint
extendWorkListCt ct wl
@@ -298,18 +275,18 @@ extendWorkListCts :: Cts -> WorkList -> WorkList
extendWorkListCts cts wl = foldr extendWorkListCt wl cts
isEmptyWorkList :: WorkList -> Bool
-isEmptyWorkList (WL { wl_eqs_N = eqs_N, wl_eqs_X = eqs_X, wl_rw_eqs = rw_eqs
- , wl_rest = rest, wl_implics = implics })
- = null eqs_N && null eqs_X && null rw_eqs && null rest && isEmptyBag implics
+isEmptyWorkList (WL { wl_eqs_N = eqs_N, wl_eqs_X = eqs_X
+ , wl_rw_eqs = rw_eqs, wl_rest = rest })
+ = null eqs_N && null eqs_X && null rw_eqs && null rest
emptyWorkList :: WorkList
emptyWorkList = WL { wl_eqs_N = [], wl_eqs_X = []
- , wl_rw_eqs = [], wl_rest = [], wl_implics = emptyBag }
+ , wl_rw_eqs = [], wl_rest = [] }
-- Pretty printing
instance Outputable WorkList where
- ppr (WL { wl_eqs_N = eqs_N, wl_eqs_X = eqs_X, wl_rw_eqs = rw_eqs
- , wl_rest = rest, wl_implics = implics })
+ ppr (WL { wl_eqs_N = eqs_N, wl_eqs_X = eqs_X
+ , wl_rw_eqs = rw_eqs, wl_rest = rest })
= text "WL" <+> (braces $
vcat [ ppUnless (null eqs_N) $
text "Eqs_N =" <+> vcat (map ppr eqs_N)
@@ -319,9 +296,6 @@ instance Outputable WorkList where
text "RwEqs =" <+> vcat (map ppr rw_eqs)
, ppUnless (null rest) $
text "Non-eqs =" <+> vcat (map ppr rest)
- , ppUnless (isEmptyBag implics) $
- ifPprDebug (text "Implics =" <+> vcat (map ppr (bagToList implics)))
- (text "(Implics omitted)")
])
{- *********************************************************************
=====================================
compiler/GHC/Tc/Solver/Monad.hs
=====================================
@@ -17,12 +17,10 @@ module GHC.Tc.Solver.Monad (
-- The TcS monad
TcS(..), TcSEnv(..),
runTcS, runTcSEarlyAbort, runTcSWithEvBinds, runTcSInerts,
- runTcSSpecPrag,
failTcS, warnTcS, addErrTcS, wrapTcS, ctLocWarnTcS,
runTcSEqualities,
nestTcS, nestImplicTcS, tryTcS,
setEvBindsTcS, setTcLevelTcS,
- emitImplicationTcS, emitTvImplicationTcS,
emitFunDepWanteds,
selectNextWorkItem,
@@ -746,8 +744,7 @@ get_sc_pending this_lvl ic@(IC { inert_dicts = dicts, inert_insts = insts })
-- We only want Givens from this level; see (3a) in
-- Note [The superclass story] in GHC.Tc.Solver.Dict
-getUnsolvedInerts :: TcS ( Bag Implication
- , Cts ) -- All simple constraints
+getUnsolvedInerts :: TcS Cts -- All simple constraints
-- Return all the unsolved [Wanted] constraints
--
-- Post-condition: the returned simple constraints are all fully zonked
@@ -767,20 +764,17 @@ getUnsolvedInerts
unsolved_dicts = foldDicts (add_if_unsolved CDictCan) idicts emptyCts
unsolved_qcis = foldr (add_if_unsolved CQuantCan) emptyCts qcis
- ; implics <- getWorkListImplics
-
; traceTcS "getUnsolvedInerts" $
vcat [ text " tv eqs =" <+> ppr unsolved_tv_eqs
, text "fun eqs =" <+> ppr unsolved_fun_eqs
, text "dicts =" <+> ppr unsolved_dicts
- , text "irreds =" <+> ppr unsolved_irreds
- , text "implics =" <+> ppr implics ]
-
- ; return ( implics, unsolved_tv_eqs `unionBags`
- unsolved_fun_eqs `unionBags`
- unsolved_irreds `unionBags`
- unsolved_dicts `unionBags`
- unsolved_qcis ) }
+ , text "irreds =" <+> ppr unsolved_irreds ]
+
+ ; return ( unsolved_tv_eqs `unionBags`
+ unsolved_fun_eqs `unionBags`
+ unsolved_irreds `unionBags`
+ unsolved_dicts `unionBags`
+ unsolved_qcis ) }
where
add_if_unsolved :: (a -> Ct) -> a -> Cts -> Cts
add_if_unsolved mk_ct thing cts
@@ -938,7 +932,7 @@ data TcSMode
= TcSVanilla -- ^ Normal constraint solving
| TcSPMCheck -- ^ Used when doing patterm match overlap checks
| TcSEarlyAbort -- ^ Abort early on insoluble constraints
- | TcSSpecPrag -- ^ Fully solve all constraints
+ | TcSShortCut -- ^ Fully solve all constraints, without using local Givens
deriving (Eq)
{- Note [TcSMode]
@@ -1135,10 +1129,6 @@ runTcSEarlyAbort tcs
-- | Run the 'TcS' monad in 'TcSSpecPrag' mode, which either fully solves
-- individual Wanted quantified constraints or leaves them alone.
--
--- See Note [TcSSpecPrag].
-runTcSSpecPrag :: EvBindsVar -> TcS a -> TcM a
-runTcSSpecPrag ev_binds_var tcs
- = runTcSWithEvBinds' TcSSpecPrag ev_binds_var tcs
{- Note [TcSSpecPrag]
~~~~~~~~~~~~~~~~~~~~~
@@ -1390,46 +1380,6 @@ updateInertsWith current_inerts
= current_inerts { inert_solved_dicts = new_solved
, inert_safehask = new_safehask }
-emitImplicationTcS :: TcLevel -> SkolemInfoAnon
- -> [TcTyVar] -- Skolems
- -> [EvVar] -- Givens
- -> Cts -- Wanteds
- -> TcS TcEvBinds
--- Add an implication to the TcS monad work-list
-emitImplicationTcS new_tclvl skol_info skol_tvs givens wanteds
- = do { let wc = emptyWC { wc_simple = wanteds }
- ; imp <- wrapTcS $
- do { ev_binds_var <- TcM.newTcEvBinds
- ; imp <- TcM.newImplication
- ; return (imp { ic_tclvl = new_tclvl
- , ic_skols = skol_tvs
- , ic_given = givens
- , ic_wanted = wc
- , ic_binds = ev_binds_var
- , ic_info = skol_info }) }
-
- ; updWorkListTcS (extendWorkListImplic imp)
- ; return (TcEvBinds (ic_binds imp)) }
-
-emitTvImplicationTcS :: TcLevel -> SkolemInfoAnon
- -> [TcTyVar] -- Skolems
- -> Cts -- Wanteds
- -> TcS ()
--- Just like emitImplicationTcS but no givens and no bindings
-emitTvImplicationTcS new_tclvl skol_info skol_tvs wanteds
- = do { let wc = emptyWC { wc_simple = wanteds }
- ; imp <- wrapTcS $
- do { ev_binds_var <- TcM.newNoTcEvBinds
- ; imp <- TcM.newImplication
- ; return (imp { ic_tclvl = new_tclvl
- , ic_skols = skol_tvs
- , ic_wanted = wc
- , ic_binds = ev_binds_var
- , ic_info = skol_info }) }
-
- ; updWorkListTcS (extendWorkListImplic imp) }
-
-
{- Note [Propagate the solved dictionaries]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
It's really quite important that nestTcS does not discard the solved
@@ -1795,12 +1745,6 @@ getWorkList :: TcS WorkList
getWorkList = do { wl_var <- getTcSWorkListRef
; readTcRef wl_var }
-getWorkListImplics :: TcS (Bag Implication)
-getWorkListImplics
- = do { wl_var <- getTcSWorkListRef
- ; wl_curr <- readTcRef wl_var
- ; return (wl_implics wl_curr) }
-
updWorkListTcS :: (WorkList -> WorkList) -> TcS ()
updWorkListTcS f
= do { wl_var <- getTcSWorkListRef
@@ -2017,7 +1961,7 @@ instFlexiXTcM subst (tv:tvs)
matchGlobalInst :: DynFlags -> Class -> [Type] -> CtLoc -> TcS TcM.ClsInstResult
matchGlobalInst dflags cls tys loc
= do { mode <- getTcSMode
- ; let short_cut = mode == TcSSpecPrag
+ ; let short_cut = mode == TcSShortCut
; wrapTcS $ TcM.matchGlobalInst dflags short_cut cls tys (Just loc) }
tcInstSkolTyVarsX :: SkolemInfo -> Subst -> [TyVar] -> TcS (Subst, [TcTyVar])
=====================================
compiler/GHC/Tc/Solver/Solve.hs
=====================================
@@ -94,6 +94,7 @@ solveWanteds wc@(WC { wc_errors = errs })
; bb <- TcS.getTcEvBindsMap ev_binds_var
; traceTcS "solveWanteds }" $
vcat [ text "final wc =" <+> ppr final_wc
+ , text "ev_binds_var =" <+> ppr ev_binds_var
, text "current evbinds =" <+> ppr (evBindMapBinds bb) ]
; return final_wc }
@@ -118,19 +119,17 @@ simplify_loop n limit definitely_redo_implications
, int (lengthBag simples) <+> text "simples to solve" ])
; traceTcS "simplify_loop: wc =" (ppr wc)
- ; (unifs1, wc1) <- reportUnifications $ -- See Note [Superclass iteration]
- solveSimpleWanteds simples
+ ; (unifs1, simples1) <- reportUnifications $ -- See Note [Superclass iteration]
+ solveSimpleWanteds simples
-- Any insoluble constraints are in 'simples' and so get rewritten
-- See Note [Rewrite insolubles] in GHC.Tc.Solver.InertSet
; wc2 <- if not definitely_redo_implications -- See Note [Superclass iteration]
&& unifs1 == 0 -- for this conditional
- && isEmptyBag (wc_impl wc1)
- then return (wc { wc_simple = wc_simple wc1 }) -- Short cut
- else do { implics2 <- solveNestedImplications $
- implics `unionBags` (wc_impl wc1)
- ; return (wc { wc_simple = wc_simple wc1
- , wc_impl = implics2 }) }
+ then return (wc { wc_simple = simples1 }) -- Short cut
+ else do { implics1 <- solveNestedImplications implics
+ ; return (wc { wc_simple = simples1
+ , wc_impl = implics1 }) }
; unif_happened <- resetUnificationFlag
; csTraceTcS $ text "unif_happened" <+> ppr unif_happened
@@ -978,30 +977,32 @@ solveSimpleGivens givens
-- for use by subsequent calls of nestImplicTcS
; updInertSet (\is -> is { inert_givens = inert_cans is })
- ; traceTcS "End solveSimpleGivens }" empty }
+ ; cans <- getInertCans
+ ; traceTcS "End solveSimpleGivens }" (ppr cans) }
where
go givens = do { solveSimples (listToBag givens)
; new_givens <- runTcPluginsGiven
; when (notNull new_givens) $
go new_givens }
-solveSimpleWanteds :: Cts -> TcS WantedConstraints
+solveSimpleWanteds :: Cts -> TcS Cts
-- The result is not necessarily zonked
solveSimpleWanteds simples
= do { traceTcS "solveSimpleWanteds {" (ppr simples)
; dflags <- getDynFlags
- ; (n,wc) <- go 1 (solverIterations dflags) (emptyWC { wc_simple = simples })
+ ; (n,wc) <- go 1 (solverIterations dflags) simples
; traceTcS "solveSimpleWanteds end }" $
vcat [ text "iterations =" <+> ppr n
, text "residual =" <+> ppr wc ]
; return wc }
where
- go :: Int -> IntWithInf -> WantedConstraints -> TcS (Int, WantedConstraints)
+ go :: Int -> IntWithInf -> Cts -> TcS (Int, Cts)
-- See Note [The solveSimpleWanteds loop]
go n limit wc
| n `intGtLimit` limit
- = failTcS $ TcRnSimplifierTooManyIterations simples limit wc
- | isEmptyBag (wc_simple wc)
+ = failTcS $ TcRnSimplifierTooManyIterations
+ simples limit (emptyWC { wc_simple = wc })
+ | isEmptyBag wc
= return (n,wc)
| otherwise
= do { -- Solve
@@ -1018,17 +1019,13 @@ solveSimpleWanteds simples
else return (n, wc2) } -- Done
-solve_simple_wanteds :: WantedConstraints -> TcS WantedConstraints
+solve_simple_wanteds :: Cts -> TcS Cts
-- Try solving these constraints
-- Affects the unification state (of course) but not the inert set
-- The result is not necessarily zonked
-solve_simple_wanteds (WC { wc_simple = simples1, wc_impl = implics1, wc_errors = errs })
- = nestTcS $
- do { solveSimples simples1
- ; (implics2, unsolved) <- getUnsolvedInerts
- ; return (WC { wc_simple = unsolved
- , wc_impl = implics1 `unionBags` implics2
- , wc_errors = errs }) }
+solve_simple_wanteds simples
+ = nestTcS $ do { solveSimples simples
+ ; getUnsolvedInerts }
{- Note [The solveSimpleWanteds loop]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -1379,13 +1376,14 @@ solveWantedForAll qci tvs theta body_pred
, ic_skols = skol_tvs
, ic_given = given_ev_vars
, ic_wanted = emptyWC { wc_simple = wanteds } }
- ; traceTcS "sllveForAll }" (ppr solved)
+ ; traceTcS "solveForAll }" (ppr solved)
+ ; evbs <- TcS.getTcEvBindsMap ev_binds_var
; if not solved
then do { addInertForAll qci
; stopWith (CtWanted wtd) "Wanted forall-constraint:unsolved" }
else do { setWantedEvTerm dest EvCanonical $
EvFun { et_tvs = skol_tvs, et_given = given_ev_vars
- , et_binds = TcEvBinds ev_binds_var, et_body = w_id }
+ , et_binds = evBindMapBinds evbs, et_body = w_id }
; stopWith (CtWanted wtd) "Wanted forall-constraint:solved" } }
where
loc_env = ctLocEnv ct_loc
@@ -1596,13 +1594,13 @@ runTcPluginsGiven
-- work) and a bag of insolubles. The boolean indicates whether
-- 'solveSimpleWanteds' should feed the updated wanteds back into the
-- main solver.
-runTcPluginsWanted :: WantedConstraints -> TcS (Bool, WantedConstraints)
-runTcPluginsWanted wc@(WC { wc_simple = simples1 })
+runTcPluginsWanted :: Cts -> TcS (Bool, Cts)
+runTcPluginsWanted simples1
| isEmptyBag simples1
- = return (False, wc)
+ = return (False, simples1)
| otherwise
= do { solvers <- getTcPluginSolvers
- ; if null solvers then return (False, wc) else
+ ; if null solvers then return (False, simples1) else
do { given <- getInertGivens
; wanted <- TcS.zonkSimples simples1 -- Plugin requires zonked inputs
@@ -1624,8 +1622,7 @@ runTcPluginsWanted wc@(WC { wc_simple = simples1 })
; mapM_ setEv solved_wanted
; traceTcS "Finished plugins }" (ppr new_wanted)
- ; return ( notNull (pluginNewCts p)
- , wc { wc_simple = all_new_wanted } ) } }
+ ; return ( notNull (pluginNewCts p), all_new_wanted ) } }
where
setEv :: (EvTerm,Ct) -> TcS ()
setEv (ev,ct) = case ctEvidence ct of
=====================================
compiler/GHC/Tc/Solver/Solve.hs-boot
=====================================
@@ -2,7 +2,7 @@ module GHC.Tc.Solver.Solve where
import Prelude( Bool )
import GHC.Tc.Solver.Monad( TcS )
-import GHC.Tc.Types.Constraint( WantedConstraints, Cts, Implication )
+import GHC.Tc.Types.Constraint( Cts, Implication )
-solveSimpleWanteds :: Cts -> TcS WantedConstraints
+solveSimpleWanteds :: Cts -> TcS Cts
trySolveImplication :: Implication -> TcS Bool
=====================================
compiler/GHC/Tc/Types/Evidence.hs
=====================================
@@ -509,8 +509,8 @@ data EvTerm
| EvFun -- /\as \ds. let binds in v
{ et_tvs :: [TyVar]
, et_given :: [EvVar]
- , et_binds :: TcEvBinds -- This field is why we need an EvFun
- -- constructor, and can't just use EvExpr
+ , et_binds :: Bag EvBind -- This field is why we need an EvFun
+ -- constructor, and can't just use EvExpr
, et_body :: EvVar }
deriving Data.Data
@@ -876,7 +876,11 @@ relevantEvVar v = isInternalName (varName v)
evVarsOfTerm :: EvTerm -> VarSet
evVarsOfTerm (EvExpr e) = exprSomeFreeVars relevantEvVar e
evVarsOfTerm (EvTypeable _ ev) = evVarsOfTypeable ev
-evVarsOfTerm (EvFun {}) = emptyVarSet -- See Note [Free vars of EvFun]
+evVarsOfTerm (EvFun { et_tvs = tvs, et_given = given, et_binds = binds, et_body = v })
+ = fvs `delVarSetList` bndrs
+ where
+ fvs = foldr (unionVarSet . evVarsOfTerm . eb_rhs) (unitVarSet v) binds
+ bndrs = foldr ((:) . eb_lhs) (tvs ++ given) binds
evVarsOfTerms :: [EvTerm] -> VarSet
evVarsOfTerms = mapUnionVarSet evVarsOfTerm
=====================================
compiler/GHC/Tc/Zonk/Type.hs
=====================================
@@ -1764,7 +1764,7 @@ zonkEvTerm (EvFun { et_tvs = tvs, et_given = evs
, et_binds = ev_binds, et_body = body_id })
= runZonkBndrT (zonkTyBndrsX tvs) $ \ new_tvs ->
runZonkBndrT (zonkEvBndrsX evs) $ \ new_evs ->
- runZonkBndrT (zonkTcEvBinds ev_binds) $ \ new_ev_binds ->
+ runZonkBndrT (zonkEvBinds ev_binds) $ \ new_ev_binds ->
do { new_body_id <- zonkIdOcc body_id
; return (EvFun { et_tvs = new_tvs, et_given = new_evs
, et_binds = new_ev_binds, et_body = new_body_id }) }
=====================================
testsuite/tests/typecheck/should_compile/T23171.hs
=====================================
@@ -33,7 +33,7 @@ tried :: forall (e :: Type). (forall m. C1T e m) => e -> ()
tried = try @e
-- From the call to "try", we get [W] D (T e).
--- After using the instance for D, we get the QC [G] C3 m ==> [W] C1 (T e) m.
+-- After using the instance for D, we get the QC [W] (forall m. C3 m ==> C1 (T e) m)
--
-- The Given "[G] C3 m" thus arises from superclass expansion
-- from "D (T e)", which contains a type family application, T.
@@ -41,3 +41,16 @@ tried = try @e
-- expanding the superclasses of C3 (in this case, C2); in particular
-- ltPatersonSize needs to handle a type family in its second argument.
+{- [G] forall m. C1T e m
+ --> sc
+ [G] forall m. C1 (T e) m <<--- aJT
+
+ [W] D (T e)
+--> instance
+ [W] (forall m. C3 m => C1 (T e) m)
+
+ ---- Implication: forall m2 ---
+ [G] C3 m2
+ [W] C1 (T e) m2
+ --> solve via qci
+-}
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/592bf1aad69ed7fef07abd24393f071…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/592bf1aad69ed7fef07abd24393f071…
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[Git][ghc/ghc][wip/romes/step-out-5] 15 commits: Move ModuleGraph into UnitEnv
by Rodrigo Mesquita (＠alt-romes) 25 Jun '25
by Rodrigo Mesquita (＠alt-romes) 25 Jun '25
25 Jun '25
Rodrigo Mesquita pushed to branch wip/romes/step-out-5 at Glasgow Haskell Compiler / GHC
Commits:
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
- - - - -
76a3e56c by Rodrigo Mesquita at 2025-06-25T12:09:22+01:00
debugger/rts: Allow toggling step-in per thread
The RTS global flag `rts_stop_next_breakpoint` globally sets the
interpreter to stop at the immediate next breakpoint.
With this commit, single step mode can additionally be set per thread in
the TSO flag (TSO_STOP_NEXT_BREAKPOINT).
Being able to toggle "stop at next breakpoint" per thread is an
important requirement for implementing "stepping out" of a function in a
multi-threaded context.
And, more generally, having a per-thread flag for single-stepping paves the
way for multi-threaded debugging.
That said, when we want to enable "single step" mode for the whole
interpreted program we still want to stop at the immediate next
breakpoint, whichever thread it belongs to.
That's why we also keep the global `rts_stop_next_breakpoint` flag, with
`rts_enableStopNextBreakpointAll` and `rts_disableStopNextBreakpointAll` helpers.
Preparation for #26042
- - - - -
242d6102 by Rodrigo Mesquita at 2025-06-25T12:09:22+01:00
docs: Case continuation BCOs
This commit documents a subtle interaction between frames for case BCOs
and their parents frames. Namely, case continuation BCOs may refer to
(non-local) variables that are part of the parent's frame.
The note expanding a bit on these details is called [Case continuation BCOs]
- - - - -
e1dbb1f8 by Rodrigo Mesquita at 2025-06-25T14:57:21+01:00
debugger: Implement step-out feature
Implements support for stepping-out of a function (aka breaking right after
returning from a function) in the interactive debugger.
It also introduces a GHCi command :stepout to step-out of a function
being debugged in the interpreter. The feature is described as:
Stop at the first breakpoint immediately after returning from the current
function scope.
Known limitations: because a function tail-call does not push a stack
frame, if step-out is used inside of a function that was tail-called,
execution will not be returned to its caller, but rather its caller's
first non-tail caller. On the other hand, it means the debugger
follows the more realistic execution of the program.
In the following example:
.. code-block:: none
f = do
a
b <--- (1) set breakpoint then step in here
c
b = do
...
d <--- (2) step-into this tail call
d = do
...
something <--- (3) step-out here
...
Stepping-out will stop execution at the `c` invokation in `f`, rather than
stopping at `b`.
The key idea is simple: When step-out is enabled, traverse the runtime
stack until a continuation BCO is found -- and enable the breakpoint
heading that BCO explicitly using its tick-index.
The details are specified in `Note [Debugger: Step-out]` in `rts/Interpreter.c`.
Since PUSH_ALTS BCOs (representing case continuations) were never headed
by a breakpoint (unlike the case alternatives they push), we introduced
the BRK_ALTS instruction to allow the debugger to set a case
continuation to stop at the breakpoint heading the alternative that is
taken. This is further described in `Note [Debugger: BRK_ALTS]`.
Fixes #26042
- - - - -
78cdb362 by Rodrigo Mesquita at 2025-06-25T14:57:21+01:00
debugger: Filter step-out stops by SrcSpan
To implement step-out, the RTS looks for the first continuation frame on
the stack and explicitly enables its entry breakpoint. However, some
continuations will be contained in the function from which step-out was
initiated (trivial example is a case expression).
Similarly to steplocal, we will filter the breakpoints at which the RTS
yields to the debugger based on the SrcSpan. When doing step-out, only
stop if the breakpoint is /not/ contained in the function from which we
initiated it.
This is especially relevant in monadic statements such as IO which is
compiled to a long chain of case expressions.
See Note [Debugger: Filtering step-out stops]
- - - - -
77 changed files:
- compiler/GHC.hs
- compiler/GHC/ByteCode/Asm.hs
- compiler/GHC/ByteCode/Instr.hs
- compiler/GHC/ByteCode/Types.hs
- compiler/GHC/Core/Opt/Pipeline.hs
- compiler/GHC/Driver/Backpack.hs
- compiler/GHC/Driver/Config.hs
- compiler/GHC/Driver/Env.hs
- compiler/GHC/Driver/Env/Types.hs
- compiler/GHC/Driver/Main.hs
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Iface/Load.hs
- compiler/GHC/Runtime/Eval.hs
- compiler/GHC/Runtime/Eval/Types.hs
- compiler/GHC/StgToByteCode.hs
- compiler/GHC/Tc/Instance/Family.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Unit/Env.hs
- compiler/GHC/Unit/Home/Graph.hs
- compiler/GHC/Unit/Home/PackageTable.hs
- distrib/configure.ac.in
- docs/users_guide/ghci.rst
- ghc/GHCi/UI.hs
- hadrian/cfg/default.host.target.in
- hadrian/cfg/default.target.in
- hadrian/cfg/system.config.in
- hadrian/src/Builder.hs
- hadrian/src/Oracles/Setting.hs
- hadrian/src/Rules/Generate.hs
- hadrian/src/Settings/Builders/RunTest.hs
- hadrian/stack.yaml
- hadrian/stack.yaml.lock
- libraries/ghc-heap/GHC/Exts/Heap/Closures.hs
- libraries/ghc-heap/GHC/Exts/Heap/FFIClosures_ProfilingDisabled.hsc
- libraries/ghc-heap/GHC/Exts/Heap/FFIClosures_ProfilingEnabled.hsc
- libraries/ghc-heap/tests/parse_tso_flags.hs
- + libraries/ghci/GHCi/Debugger.hs
- libraries/ghci/GHCi/Message.hs
- libraries/ghci/GHCi/Run.hs
- libraries/ghci/ghci.cabal.in
- libraries/template-haskell/changelog.md
- m4/fp_settings.m4
- m4/ghc_toolchain.m4
- m4/prep_target_file.m4
- rts/Disassembler.c
- rts/Interpreter.c
- rts/Interpreter.h
- rts/RtsSymbols.c
- rts/StgMiscClosures.cmm
- rts/include/rts/Bytecodes.h
- rts/include/rts/Constants.h
- rts/include/rts/storage/Closures.h
- rts/linker/LoadArchive.c
- + testsuite/tests/ghci.debugger/scripts/T26042b.hs
- + testsuite/tests/ghci.debugger/scripts/T26042b.script
- + testsuite/tests/ghci.debugger/scripts/T26042b.stdout
- + testsuite/tests/ghci.debugger/scripts/T26042c.hs
- + testsuite/tests/ghci.debugger/scripts/T26042c.script
- + testsuite/tests/ghci.debugger/scripts/T26042c.stdout
- + testsuite/tests/ghci.debugger/scripts/T26042d.hs
- + testsuite/tests/ghci.debugger/scripts/T26042d.script
- + testsuite/tests/ghci.debugger/scripts/T26042d.stdout
- + testsuite/tests/ghci.debugger/scripts/T26042e.hs
- + testsuite/tests/ghci.debugger/scripts/T26042e.script
- + testsuite/tests/ghci.debugger/scripts/T26042e.stdout
- + testsuite/tests/ghci.debugger/scripts/T26042f.hs
- + testsuite/tests/ghci.debugger/scripts/T26042f.script
- + testsuite/tests/ghci.debugger/scripts/T26042f1.stderr
- + testsuite/tests/ghci.debugger/scripts/T26042f1.stdout
- + testsuite/tests/ghci.debugger/scripts/T26042f2.stdout
- + testsuite/tests/ghci.debugger/scripts/T26042g.hs
- + testsuite/tests/ghci.debugger/scripts/T26042g.script
- + testsuite/tests/ghci.debugger/scripts/T26042g.stdout
- testsuite/tests/ghci.debugger/scripts/all.T
- utils/ghc-toolchain/exe/Main.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Target.hs
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25 Jun '25
Sjoerd Visscher pushed to branch wip/T18570 at Glasgow Haskell Compiler / GHC
Commits:
4104fade by Sjoerd Visscher at 2025-06-25T15:00:12+02:00
Fix hole fits
- - - - -
3 changed files:
- compiler/GHC/Tc/Errors/Ppr.hs
- testsuite/tests/overloadedrecflds/should_fail/DRFHoleFits.stderr
- testsuite/tests/overloadedrecflds/should_fail/T23063.stderr
Changes:
=====================================
compiler/GHC/Tc/Errors/Ppr.hs
=====================================
@@ -3541,12 +3541,12 @@ pprHoleFit :: HoleFitDispConfig -> HoleFit -> SDoc
pprHoleFit _ (RawHoleFit sd) = sd
pprHoleFit (HFDC sWrp sWrpVars sTy sProv sMs) (TcHoleFit (HoleFit {..})) =
hang display 2 provenance
- where tyApp = sep $ zipWithEqual pprArg vars hfWrap
+ where tyApps = concat $ zipWithEqual pprArg vars hfWrap
where pprArg b arg = case binderFlag b of
- Specified -> text "@" <> pprParendType arg
+ Specified -> [text "@" <> pprParendType arg]
-- Do not print type application for inferred
-- variables (#16456)
- Inferred -> empty
+ Inferred -> []
Required -> pprPanic "pprHoleFit: bad Required"
(ppr b <+> ppr arg)
tyAppVars = sep $ punctuate comma $
@@ -3573,9 +3573,9 @@ pprHoleFit (HFDC sWrp sWrpVars sTy sProv sMs) (TcHoleFit (HoleFit {..})) =
IdHFCand id_ -> pprPrefixOcc id_
tyDisp = ppWhen sTy $ dcolon <+> ppr hfType
has = not . null
- wrapDisp = ppWhen (has hfWrap && (sWrp || sWrpVars))
+ wrapDisp = ppWhen (has tyApps && (sWrp || sWrpVars))
$ text "with" <+> if sWrp || not sTy
- then occDisp <+> tyApp
+ then occDisp <+> sep tyApps
else tyAppVars
docs = case hfDoc of
Just d -> pprHsDocStrings d
=====================================
testsuite/tests/overloadedrecflds/should_fail/DRFHoleFits.stderr
=====================================
@@ -6,9 +6,7 @@ DRFHoleFits.hs:7:7: error: [GHC-88464]
bar :: T -> Int (bound at DRFHoleFits.hs:7:1)
Valid hole fits include
bar :: T -> Int (defined at DRFHoleFits.hs:7:1)
- foo :: T -> Int
- with foo
- (defined at DRFHoleFits.hs:5:16)
+ foo :: T -> Int (defined at DRFHoleFits.hs:5:16)
DRFHoleFits.hs:8:7: error: [GHC-88464]
• Found hole: _ :: A.S -> Int
@@ -19,7 +17,6 @@ DRFHoleFits.hs:8:7: error: [GHC-88464]
Valid hole fits include
baz :: A.S -> Int (defined at DRFHoleFits.hs:8:1)
A.foo :: A.S -> Int
- with A.foo
(imported qualified from ‘DRFHoleFits_A’ at DRFHoleFits.hs:3:1-35
(and originally defined at DRFHoleFits_A.hs:5:16-18))
=====================================
testsuite/tests/overloadedrecflds/should_fail/T23063.stderr
=====================================
@@ -7,7 +7,6 @@ T23063.hs:5:7: error: [GHC-88464]
Valid hole fits include
baz :: A.S -> Int (defined at T23063.hs:5:1)
A.foo :: A.S -> Int
- with A.foo
(imported qualified from ‘T23063_aux’ at T23063.hs:3:1-32
(and originally defined at T23063_aux.hs:4:16-18))
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[Git][ghc/ghc][wip/chreekat/ci-timings] 136 commits: Refactor Handling of Multiple Default Declarations
by Bryan R (＠chreekat) 25 Jun '25
by Bryan R (＠chreekat) 25 Jun '25
25 Jun '25
Bryan R pushed to branch wip/chreekat/ci-timings at Glasgow Haskell Compiler / GHC
Commits:
e0f3ff11 by Patrick at 2025-04-17T04:31:12-04:00
Refactor Handling of Multiple Default Declarations
Fixes: #25912, #25914, #25934
Previously, GHC discarded all loaded defaults (tcg_default) when local
defaults were encountered during typechecking. According to the
exportable-named-default proposal (sections 2.4.2 and 2.4.3), local
defaults should be merged into tcg_default, retaining any defaults
already present while overriding where necessary.
Key Changes:
* Introduce DefaultProvenance to track the origin of default declarations
(local, imported, or built-in), replacing the original cd_module
in ClassDefaults with cd_provenance :: DefaultProvenance.
* Rename tcDefaults to tcDefaultDecls, limiting its responsibility to only
converting renamed class defaults into ClassDefaults.
* Add extendDefaultEnvWithLocalDefaults to merge local defaults into the
environment, with proper duplication checks:
- Duplicate local defaults for a class trigger an error.
- Local defaults override imported or built-in defaults.
* Update and add related notes: Note [Builtin class defaults],
Note [DefaultProvenance].
* Add regression tests: T25912, T25914, T25934.
Thanks sam and simon for the help on this patch.
Co-authored-by: sheaf <sam.derbyshire(a)gmail.com>
- - - - -
386f1854 by Teo Camarasu at 2025-04-17T04:31:55-04:00
template-haskell: Remove `addrToByteArrayName` and `addrToByteArray`
These were part of the implementation of the `Lift ByteArray` instance and were errornously exported because this module lacked an explicit export list. They have no usages on Hackage.
Resolves #24782
- - - - -
b96e2f77 by Sylvain Henry at 2025-04-18T20:46:33-04:00
RTS: remove target info and fix host info (#24058)
The RTS isn't a compiler, hence it doesn't have a target and we remove
the reported target info displayed by "+RTS --info". We also fix the
host info displayed by "+RTS --info": the host of the RTS is the
RTS-building compiler's target, not the compiler's host (wrong when
doing cross-compilation).
- - - - -
6d9965f4 by Sylvain Henry at 2025-04-18T20:46:33-04:00
RTS: remove build info
As per the discussion in !13967, there is no reason to tag the RTS with
information about the build platform.
- - - - -
d52e9b3f by Vladislav Zavialov at 2025-04-18T20:47:15-04:00
Diagnostics: remove the KindMismatch constructor (#25957)
The KindMismatch constructor was only used as an intermediate
representation in pretty-printing.
Its removal addresses a problem detected by the "codes" test case:
[GHC-89223] is untested (constructor = KindMismatch)
In a concious deviation from the usual procedure, the error code
GHC-89223 is removed entirely rather than marked as Outdated.
The reason is that it never was user-facing in the first place.
- - - - -
e2f2f9d0 by Vladislav Zavialov at 2025-04-20T10:53:39-04:00
Add name for -Wunusable-unpack-pragmas
This warning had no name or flag and was triggered unconditionally.
Now it is part of -Wdefault.
In GHC.Tc.TyCl.tcTyClGroupsPass's strict mode, we now have to
force-enable this warning to ensure that detection of flawed groups
continues to work even if the user disables the warning with the
-Wno-unusable-unpack-pragmas option. Test case: T3990c
Also, the misnamed BackpackUnpackAbstractType is now called
UnusableUnpackPragma.
- - - - -
6caa6508 by Adam Gundry at 2025-04-20T10:54:22-04:00
Fix specialisation of incoherent instances (fixes #25883)
GHC normally assumes that class constraints are canonical, meaning that
the specialiser is allowed to replace one dictionary argument with another
provided that they have the same type. The `-fno-specialise-incoherents`
flag alters INCOHERENT instance definitions so that they will prevent
specialisation in some cases, by inserting `nospec`.
This commit fixes a bug in 7124e4ad76d98f1fc246ada4fd7bf64413ff2f2e, which
treated some INCOHERENT instance matches as if `-fno-specialise-incoherents`
was in effect, thereby unnecessarily preventing specialisation. In addition
it updates the relevant `Note [Rules for instance lookup]` and adds a new
`Note [Canonicity for incoherent matches]`.
- - - - -
0426fd6c by Adam Gundry at 2025-04-20T10:54:23-04:00
Add regression test for #23429
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eec96527 by Adam Gundry at 2025-04-20T10:54:23-04:00
user's guide: update specification of overlapping/incoherent instances
The description of the instance resolution algorithm in the user's
guide was slightly out of date, because it mentioned in-scope given
constraints only at the end, whereas the implementation checks for
their presence before any of the other steps.
This also adds a warning to the user's guide about the impact of
incoherent instances on specialisation, and more clearly documents
some of the other effects of `-XIncoherentInstances`.
- - - - -
a00eeaec by Matthew Craven at 2025-04-20T10:55:03-04:00
Fix bytecode generation for `tagToEnum# <LITERAL>`
Fixes #25975.
- - - - -
2e204269 by Andreas Klebinger at 2025-04-22T12:20:41+02:00
Simplifier: Constant fold invald tagToEnum# calls to bottom expr.
When applying tagToEnum# to a out-of-range value it's best to simply
constant fold it to a bottom expression. That potentially allows more
dead code elimination and makes debugging easier.
Fixes #25976
- - - - -
7250fc0c by Matthew Pickering at 2025-04-22T16:24:04-04:00
Move -fno-code note into Downsweep module
This note was left behind when all the code which referred to it was
moved into the GHC.Driver.Downsweep module
- - - - -
d2dc89b4 by Matthew Pickering at 2025-04-22T16:24:04-04:00
Apply editing notes to Note [-fno-code mode] suggested by sheaf
These notes were suggested in https://gitlab.haskell.org/ghc/ghc/-/merge_requests/14241
- - - - -
91564daf by Matthew Pickering at 2025-04-24T00:29:02-04:00
ghci: Use loadInterfaceForModule rather than loadSrcInterface in mkTopLevEnv
loadSrcInterface takes a user given `ModuleName` and resolves it to the
module which needs to be loaded (taking into account module
renaming/visibility etc).
loadInterfaceForModule takes a specific module and loads it.
The modules in `ImpDeclSpec` have already been resolved to the actual
module to get the information from during renaming. Therefore we just
need to fetch the precise interface from disk (and not attempt to rename
it again).
Fixes #25951
- - - - -
2e0c07ab by Simon Peyton Jones at 2025-04-24T00:29:43-04:00
Test for #23298
- - - - -
0eef99b0 by Sven Tennie at 2025-04-24T07:34:36-04:00
RV64: Introduce J instruction (non-local jumps) and don't deallocate stack slots for J_TBL (#25738)
J_TBL result in local jumps, there should not deallocate stack slots
(see Note [extra spill slots].)
J is for non-local jumps, these may need to deallocate stack slots.
- - - - -
1bd3d13e by fendor at 2025-04-24T07:35:17-04:00
Add `UnitId` to `EvalBreakpoint`
The `EvalBreakpoint` is used to communicate that a breakpoint was
encountered during code evaluation.
This `EvalBreakpoint` needs to be converted to an `InternalBreakpointId`
which stores a `Module` to uniquely find the correct `Module` in the
Home Package Table.
The `EvalBreakpoint` used to store only a `ModuleName` which is then
converted to a `Module` based on the currently active home unit.
This is incorrect in the face of multiple home units, the break point
could be in an entirely other home unit!
To fix this, we additionally store the `UnitId` of the `Module` in
`EvalBreakpoint` to later reconstruct the correct `Module`
All of the changes are the consequence of extending `EvalBreakpoint`
with the additional `ShortByteString` of the `UnitId`.
For performance reasons, we store the `ShortByteString` backing the
`UnitId` directly, avoiding marshalling overhead.
- - - - -
fe6ed8d9 by Sylvain Henry at 2025-04-24T18:04:12-04:00
Doc: add doc for JS interruptible calling convention (#24444)
- - - - -
6111c5e4 by Ben Gamari at 2025-04-24T18:04:53-04:00
compiler: Ensure that Panic.Plain.assertPanic' provides callstack
In 36cddd2ce1a3bc62ea8a1307d8bc6006d54109cf @alt-romes removed CallStack
output from `GHC.Utils.Panic.Plain.assertPanic'`. While this output is
redundant due to the exception backtrace proposal, we may be
bootstrapping with a compiler which does not yet include this machinery.
Reintroduce the output for now.
Fixes #25898.
- - - - -
217caad1 by Matthew Pickering at 2025-04-25T18:58:42+01:00
Implement Explicit Level Imports for Template Haskell
This commit introduces the `ExplicitLevelImports` and
`ImplicitStagePersistence` language extensions as proposed in GHC
Proposal #682.
Key Features
------------
- `ExplicitLevelImports` adds two new import modifiers - `splice` and
`quote` - allowing precise control over the level at which imported
identifiers are available
- `ImplicitStagePersistence` (enabled by default) preserves existing
path-based cross-stage persistence behavior
- `NoImplicitStagePersistence` disables implicit cross-stage
persistence, requiring explicit level imports
Benefits
--------
- Improved compilation performance by reducing unnecessary code generation
- Enhanced IDE experience with faster feedback in `-fno-code` mode
- Better dependency tracking by distinguishing compile-time and runtime dependencies
- Foundation for future cross-compilation improvements
This implementation enables the separation of modules needed at
compile-time from those needed at runtime, allowing for more efficient
compilation pipelines and clearer code organization in projects using
Template Haskell.
Implementation Notes
--------------------
The level which a name is availble at is stored in the 'GRE', in the normal
GlobalRdrEnv. The function `greLevels` returns the levels which a specific GRE
is imported at. The level information for a 'Name' is computed by `getCurrentAndBindLevel`.
The level validity is checked by `checkCrossLevelLifting`.
Instances are checked by `checkWellLevelledDFun`, which computes the level an
instance by calling `checkWellLevelledInstanceWhat`, which sees what is
available at by looking at the module graph.
Modifications to downsweep
--------------------------
Code generation is now only enabled for modules which are needed at
compile time.
See the Note [-fno-code mode] for more information.
Uniform error messages for level errors
---------------------------------------
All error messages to do with levels are now reported uniformly using
the `TcRnBadlyStaged` constructor.
Error messages are uniformly reported in terms of levels.
0 - top-level
1 - quote level
-1 - splice level
The only level hard-coded into the compiler is the top-level in
GHC.Types.ThLevelIndex.topLevelIndex.
Uniformly refer to levels and stages
------------------------------------
There was much confusion about levels vs stages in the compiler.
A level is a semantic concept, used by the typechecker to ensure a
program can be evaluated in a well-staged manner.
A stage is an operational construct, program evaluation proceeds in
stages.
Deprecate -Wbadly-staged-types
------------------------------
`-Wbadly-staged-types` is deprecated in favour of `-Wbadly-levelled-types`.
Lift derivation changed
-----------------------
Derived lift instances will now not generate code with expression
quotations.
Before:
```
data A = A Int deriving Lift
=>
lift (A x) = [| A $(lift x) |]
```
After:
```
lift (A x) = conE 'A `appE` (lift x)
```
This is because if you attempt to derive `Lift` in a module where
`NoImplicitStagePersistence` is enabled, you would get an infinite loop
where a constructor was attempted to be persisted using the instance you
are currently defining.
GHC API Changes
---------------
The ModuleGraph now contains additional information about the type of
the edges (normal, quote or splice) between modules. This is abstracted
using the `ModuleGraphEdge` data type.
Fixes #25828
-------------------------
Metric Increase:
MultiLayerModulesTH_Make
-------------------------
- - - - -
7641a74a by Simon Peyton Jones at 2025-04-26T22:05:19-04:00
Get a decent MatchContext for pattern synonym bindings
In particular when we have a pattern binding
K p1 .. pn = rhs
where K is a pattern synonym. (It might be nested.)
This small MR fixes #25995. It's a tiny fix, to an error message,
removing an always-dubious `unkSkol`.
The bug report was in the context of horde-ad, a big program,
and I didn't manage to make a small repro case quickly. I decided
not to bother further.
- - - - -
ce616f49 by Simon Peyton Jones at 2025-04-27T21:10:25+01:00
Fix infelicities in the Specialiser
On the way to #23109 (unary classes) I discovered some infelicities
(or maybe tiny bugs, I forget) in the type-class specialiser.
I also tripped over #25965, an outright bug in the rule matcher
Specifically:
* Refactor: I enhanced `wantCallsFor`, whih previously always said
`True`, to discard calls of class-ops, data constructors etc. This is
a bit more efficient; and it means we don't need to worry about
filtering them out later.
* Fix: I tidied up some tricky logic that eliminated redundant
specialisations. It wasn't working correctly. See the expanded
Note [Specialisations already covered], and
(MP3) in Note [Specialising polymorphic dictionaries].
See also the new top-level `alreadyCovered`
function, which now goes via `GHC.Core.Rules.ruleLhsIsMoreSpecific`
I also added a useful Note [The (CI-KEY) invariant]
* Fix #25965: fixed a tricky bug in the `go_fam_fam` in
`GHC.Core.Unify.uVarOrFam`, which allows matching to succeed
without binding all type varibles.
I enhanced Note [Apartness and type families] some more
* #25703. This ticket "just works" with -fpolymorphic-specialisation;
but I was surprised that it worked! In this MR I added documentation
to Note [Interesting dictionary arguments] to explain; and tests to
ensure it stays fixed.
- - - - -
22d11fa8 by Simon Peyton Jones at 2025-04-28T18:05:19-04:00
Track rewriter sets more accurately in constraint solving
The key change, which fixed #25440, is to call `recordRewriter` in
GHC.Tc.Solver.Rewrite.rewrite_exact_fam_app. This missing call meant
that we were secretly rewriting a Wanted with a Wanted, but not really
noticing; and that led to a very bad error message, as you can see
in the ticket.
But of course that led me into rabbit hole of other refactoring around
the RewriteSet code:
* Improve Notes [Wanteds rewrite Wanteds]
* Zonk the RewriterSet in `zonkCtEvidence` rather than only in GHC.Tc.Errors.
This is tidier anyway (e.g. de-clutters debug output), and helps with the
next point.
* In GHC.Tc.Solver.Equality.inertsCanDischarge, don't replace a constraint
with no rewriters with an equal constraint that has many. See
See (CE4) in Note [Combining equalities]
* Move zonkRewriterSet and friends from GHC.Tc.Zonk.Type into
GHC.Tc.Zonk.TcType, where they properly belong.
A handful of tests get better error messages.
For some reason T24984 gets 12% less compiler allocation -- good
Metric Decrease:
T24984
- - - - -
6467d61e by Brandon Chinn at 2025-04-29T18:36:03-04:00
Fix lexing "\^\" (#25937)
This broke in the refactor in !13128, where the old code parsed escape
codes and collapsed string gaps at the same time, but the new code
collapsed gaps first, then resolved escape codes. The new code used a
naive heuristic to skip escaped backslashes, but didn't account for
"\^\".
- - - - -
99868a86 by Jens Petersen at 2025-04-29T18:36:44-04:00
hadrian: default selftest to disabled
- - - - -
aba2a4a5 by Zubin Duggal at 2025-04-30T06:35:59-04:00
get-win32-tarballs.py: List tarball files to be downloaded if we cannot find them
Fixes #25929
- - - - -
d99a617b by Ben Gamari at 2025-04-30T06:36:40-04:00
Move Data ModuleName instance to Language.Haskell.Syntax.Module.Name
Fixes #25968.
- - - - -
9995c2b7 by Serge S. Gulin at 2025-05-04T17:13:36+03:00
Support for ARM64 Windows (LLVM-enabled) (fixes #24603)
1. Add Windows AArch64 cross-compilation support via CI jobs
Introduce new CI configurations for cross-compiling to Windows ARM64 using Debian12Wine, FEX, and MSYS2.
Configure toolchain variables for LLVM MinGW and Wine emulation in CI pipelines.
2. Adjust compiler and RTS for AArch64 Windows compatibility
Reserve register `x18` on Windows and Darwin platforms in AArch64 codegen.
Handle Windows-specific relocations and data sections in AArch64 assembler.
Update PEi386 linker to recognize ARM64 binaries and support exception handling.
Adjust LLVM target definitions and data layouts for new architectures.
Update `ghc-toolchain` and build scripts to handle `TablesNextToCode` on Windows ARM64.
3. Enhance CI scripts and stability
Modify `ci.sh` to handle mingw cross-targets, fixing GHC executable paths and test execution.
Use `diff -w` in tests to ignore whitespace differences, improving cross-platform consistency.
4. Refactor and clean up code
Remove redundant imports in hello.hs test.
Improve error messages and checks for unsupported configurations in the driver.
Add `EXDEV` error code to `errno.js`.
Add async/sync flags to IO logs at `base.js`.
Improve POSIX compatibility for file close at `base.js`: decrease indeterminism for mixed cases of async and sync code.
5. Update dependencies: `Cabal`, `Win32`, `directory`, `process`, `haskeline`, and `unix`.
submodule
Co-authored-by: Cheng Shao <terrorjack(a)type.dance>
Co-authored-by: Dmitrii Egorov <egorov.d.i(a)icloud.com>
Co-authored-by: Andrei Borzenkov <root(a)sandwitch.dev>
- - - - -
50fa8165 by Javran Cheng at 2025-05-05T05:55:39-04:00
Suppress unused do-binding if discarded variable is Any or ZonkAny.
Consider example (#25895):
> do { forever (return ()); blah }
where `forever :: forall a b. IO a -> IO b`.
Nothing constrains `b`, so it will be instantiates with `Any` or
`ZonkAny`.
But we certainly don't want to complain about a discarded do-binding.
Fixes #25895
- - - - -
e46c6b18 by Rodrigo Mesquita at 2025-05-06T09:01:57-04:00
Refactor mkTopLevImportedEnv out of mkTopLevEnv
This makes the code clearer and allows the top-level import context to
be fetched directly from the HomeModInfo through the API (e.g. useful
for the debugger).
- - - - -
0ce0d263 by Rodrigo Mesquita at 2025-05-06T09:01:57-04:00
Export sizeOccEnv from GHC.Types.Name.Occurrence
Counts the number of OccNames in an OccEnv
- - - - -
165f98d8 by Simon Peyton Jones at 2025-05-06T09:02:39-04:00
Fix a bad untouchability bug im simplifyInfer
This patch addresses #26004. The root cause was that simplifyInfer
was willing to unify variables "far out". The fix, in
runTcSWithEvBinds', is to initialise the inert set given-eq level with
the current level. See
(TGE6) in Note [Tracking Given equalities]
in GHC.Tc.Solver.InertSet
Two loosely related refactors:
* Refactored approximateWCX to return just the free type
variables of the un-quantified constraints. That avoids duplication
of work (these free vars are needed in simplifyInfer) and makes it
clearer that the constraints themselves are irrelevant.
* A little local refactor of TcSMode, which reduces the number of
parameters to runTcSWithEvBinds
- - - - -
6e67fa08 by Ben Gamari at 2025-05-08T06:21:21-04:00
llvmGen: Fix built-in variable predicate
Previously the predicate to identify LLVM builtin global variables was
checking for `$llvm` rather than `@llvm` as it should.
- - - - -
a9d0a22c by Ben Gamari at 2025-05-08T06:21:22-04:00
llvmGen: Fix linkage of built-in arrays
LLVM now insists that built-in arrays use Appending linkage, not
Internal.
Fixes #25769.
- - - - -
9c6d2b1b by sheaf at 2025-05-08T06:22:11-04:00
Use mkTrAppChecked in ds_ev_typeable
This change avoids violating the invariant of mkTrApp according to which
the argument should not be a fully saturated function type.
This ensures we don't return false negatives for type equality
involving function types.
Fixes #25998
- - - - -
75cadf81 by Ryan Hendrickson at 2025-05-08T06:22:55-04:00
haddock: Preserve indentation in multiline examples
Intended for use with :{ :}, but doesn't look for those characters. Any
consecutive lines with birdtracks will only have initial whitespace
stripped up to the column of the first line.
- - - - -
fee9b351 by Cheng Shao at 2025-05-08T06:23:36-04:00
ci: re-enable chrome for wasm ghci browser tests
Currently only firefox is enabled for wasm ghci browser tests, for
some reason testing with chrome works on my machine but gets stuck on
gitlab instance runners. This patch re-enables testing with chrome by
passing `--no-sandbox`, since chrome sandboxing doesn't work in
containers without `--cap-add=SYS_ADMIN`.
- - - - -
282df905 by Vladislav Zavialov at 2025-05-09T03:18:25-04:00
Take subordinate 'type' specifiers into account
This patch fixes multiple bugs (#22581, #25983, #25984, #25991)
in name resolution of subordinate import lists.
Bug #22581
----------
In subordinate import lists, the use of the `type` namespace specifier
used to be ignored. For example, this import statement was incorrectly
accepted:
import Prelude (Bool(type True))
Now it results in an error message:
<interactive>:2:17: error: [GHC-51433]
In the import of ‘Prelude’:
a data type called ‘Bool’ is exported,
but its subordinate item ‘True’ is not in the type namespace.
Bug #25983
----------
In subordinate import lists within a `hiding` clause, non-existent
items led to a poor warning message with -Wdodgy-imports. Consider:
import Prelude hiding (Bool(X))
The warning message for this import statement used to misreport the
cause of the problem:
<interactive>:3:24: warning: [GHC-56449] [-Wdodgy-imports]
In the import of ‘Prelude’:
an item called ‘Bool’ is exported, but it is a type.
Now the warning message is correct:
<interactive>:2:24: warning: [GHC-10237] [-Wdodgy-imports]
In the import of ‘Prelude’:
a data type called ‘Bool’ is exported, but it does not export
any constructors or record fields called ‘X’.
Bug #25984
----------
In subordinate import lists within a `hiding` clause, non-existent
items resulted in the entire import declaration being discarded.
For example, this program was incorrectly accepted:
import Prelude hiding (Bool(True,X))
t = True
Now it results in an error message:
<interactive>:2:5: error: [GHC-88464]
Data constructor not in scope: True
Bug #25991
----------
In subordinate import lists, it was not possible to refer to a class
method if there was an associated type of the same name:
module M_helper where
class C a b where
type a # b
(#) :: a -> b -> ()
module M where
import M_helper (C((#)))
This import declaration failed with:
M.hs:2:28: error: [GHC-10237]
In the import of ‘M_helper’:
an item called ‘C’ is exported, but it does not export any children
(constructors, class methods or field names) called ‘#’.
Now it is accepted.
Summary
-------
The changes required to fix these bugs are almost entirely confined to
GHC.Rename.Names. Other than that, there is a new error constructor
BadImportNonTypeSubordinates with error code [GHC-51433].
Test cases:
T22581a T22581b T22581c T22581d
T25983a T25983b T25983c T25983d T25983e T25983f T25983g
T25984a T25984b
T25991a T25991b1 T25991b2
- - - - -
51b0ce8f by Simon Peyton Jones at 2025-05-09T03:19:07-04:00
Slighty improve `dropMisleading`
Fix #26105, by upgrading the (horrible, hacky) `dropMisleading`
function.
This fix makes things a bit better but does not cure the underlying
problem.
- - - - -
7b2d1e6d by Simon Peyton Jones at 2025-05-11T03:24:47-04:00
Refine `noGivenNewtypeReprEqs` to account for quantified constraints
This little MR fixes #26020. We are on the edge of completeness
for newtype equalities (that doesn't change) but this MR makes GHC
a bit more consistent -- and fixes the bug reported.
- - - - -
eaa8093b by Cheng Shao at 2025-05-11T03:25:28-04:00
wasm: mark freeJSVal as INLINE
This patch marks `freeJSVal` as `INLINE` for the wasm backend. I
noticed that the `freeJSVal` invocations are not inlined when
inspecting STG/Cmm dumps of downstream libraries that use release
build of the wasm backend. The performance benefit of inlining here is
very modest, but so is the cost anyway; if you are using `freeJSVal`
at all then you care about every potential chance to improve
performance :)
- - - - -
eac196df by Cheng Shao at 2025-05-11T03:25:28-04:00
wasm: add zero length fast path for fromJSString
This patch adds a zero length fast path for `fromJSString`; when
marshaling a zero-length `JSString` we don't need to allocate an empty
`ByteArray#` at all.
- - - - -
652cba7e by Peng Fan at 2025-05-14T04:24:35-04:00
Add LoongArch NCG support
Not supported before.
- - - - -
c01f4374 by Lin Runze at 2025-05-14T04:24:35-04:00
ci: Add LoongArch64 cross-compile CI for testing
- - - - -
ce6cf240 by Ben Gamari at 2025-05-14T04:25:18-04:00
rts/linker: Don't fail due to RTLD_NOW
In !12264 we started using the NativeObj machinery introduced some time
ago for loading of shared objects. One of the side-effects of this
change is shared objects are now loaded eagerly (i.e. with `RTLD_NOW`).
This is needed by NativeObj to ensure full visibility of the mappings of
the loaded object, which is in turn needed for safe shared object
unloading.
Unfortunately, this change subtly regressed, causing compilation
failures in some programs. Specifically, shared objects which refer to
undefined symbols (e.g. which may be usually provided by either the
executable image or libraries loaded via `dlopen`) will fail to load
with eager binding. This is problematic as GHC loads all package
dependencies while, e.g., evaluating TemplateHaskell splices. This
results in compilation failures in programs depending upon (but not
using at compile-time) packages with undefined symbol references.
To mitigate this NativeObj now first attempts to load an object via
eager binding, reverting to lazy binding (and disabling unloading) on
failure.
See Note [Don't fail due to RTLD_NOW].
Fixes #25943.
- - - - -
88ee8bb5 by Sylvain Henry at 2025-05-14T04:26:15-04:00
Deprecate GHC.JS.Prim.Internal.Build (#23432)
Deprecated as per CLC proposal 329 (https://github.com/haskell/core-libraries-committee/issues/329)
- - - - -
b4ed465b by Cheng Shao at 2025-05-14T04:26:57-04:00
libffi: update to 3.4.8
Bumps libffi submodule.
- - - - -
a3e71296 by Matthew Pickering at 2025-05-14T04:27:38-04:00
Remove leftover trace
- - - - -
2d0ecdc6 by Cheng Shao at 2025-05-14T04:28:19-04:00
Revert "ci: re-enable chrome for wasm ghci browser tests"
This reverts commit fee9b351fa5a35d5778d1252789eacaaf5663ae8.
Unfortunately the chrome test jobs may still timeout on certain
runners (e.g. OpenCape) for unknown reasons.
- - - - -
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
- - - - -
b5232f02 by Bryan Richter at 2025-06-25T14:57:13+03:00
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
- - - - -
8cacc21c by Bryan Richter at 2025-06-25T14:57:13+03:00
CI: Update collapsible section usage
The syntax apparently changed at some point.
- - - - -
0a933a10 by Bryan Richter at 2025-06-25T14:57:13+03:00
CI: Add more collapsible sections
- - - - -
1036 changed files:
- .gitlab-ci.yml
- .gitlab/ci.sh
- .gitlab/common.sh
- .gitlab/generate-ci/gen_ci.hs
- .gitlab/hello.hs
- .gitlab/jobs.yaml
- compiler/CodeGen.Platform.h
- compiler/GHC.hs
- compiler/GHC/Builtin/Names.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/Cmm/CLabel.hs
- compiler/GHC/CmmToAsm.hs
- compiler/GHC/CmmToAsm/AArch64/CodeGen.hs
- compiler/GHC/CmmToAsm/AArch64/Instr.hs
- compiler/GHC/CmmToAsm/AArch64/Ppr.hs
- compiler/GHC/CmmToAsm/Dwarf/Constants.hs
- + compiler/GHC/CmmToAsm/LA64.hs
- + compiler/GHC/CmmToAsm/LA64/CodeGen.hs
- + compiler/GHC/CmmToAsm/LA64/Cond.hs
- + compiler/GHC/CmmToAsm/LA64/Instr.hs
- + compiler/GHC/CmmToAsm/LA64/Ppr.hs
- + compiler/GHC/CmmToAsm/LA64/RegInfo.hs
- + compiler/GHC/CmmToAsm/LA64/Regs.hs
- compiler/GHC/CmmToAsm/PIC.hs
- compiler/GHC/CmmToAsm/RV64/CodeGen.hs
- compiler/GHC/CmmToAsm/RV64/Instr.hs
- compiler/GHC/CmmToAsm/RV64/Ppr.hs
- compiler/GHC/CmmToAsm/Reg/Graph/TrivColorable.hs
- compiler/GHC/CmmToAsm/Reg/Linear.hs
- compiler/GHC/CmmToAsm/Reg/Linear/AArch64.hs
- compiler/GHC/CmmToAsm/Reg/Linear/FreeRegs.hs
- + compiler/GHC/CmmToAsm/Reg/Linear/LA64.hs
- compiler/GHC/CmmToAsm/Reg/Target.hs
- compiler/GHC/CmmToAsm/X86/CodeGen.hs
- compiler/GHC/CmmToLlvm/Base.hs
- compiler/GHC/CmmToLlvm/Data.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/InstEnv.hs
- compiler/GHC/Core/Make.hs
- compiler/GHC/Core/Opt/ConstantFold.hs
- compiler/GHC/Core/Opt/Pipeline.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Core/PatSyn.hs
- compiler/GHC/Core/Predicate.hs
- compiler/GHC/Core/Rules.hs
- compiler/GHC/Core/TyCo/Ppr.hs
- compiler/GHC/Core/TyCo/Rep.hs
- compiler/GHC/Core/TyCo/Tidy.hs
- compiler/GHC/Core/Unify.hs
- compiler/GHC/Data/Graph/Directed/Reachability.hs
- compiler/GHC/Driver/Backend.hs
- compiler/GHC/Driver/Backpack.hs
- compiler/GHC/Driver/Downsweep.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Env.hs
- compiler/GHC/Driver/Env/Types.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Main.hs
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/MakeFile.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Binds.hs
- compiler/GHC/Hs/Decls.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/Expr.hs-boot
- compiler/GHC/Hs/ImpExp.hs
- compiler/GHC/Hs/Instances.hs
- compiler/GHC/Hs/Pat.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/HsToCore/Binds.hs
- compiler/GHC/HsToCore/Breakpoints.hs
- compiler/GHC/HsToCore/Errors/Ppr.hs
- compiler/GHC/HsToCore/Errors/Types.hs
- compiler/GHC/HsToCore/Expr.hs
- compiler/GHC/HsToCore/Monad.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/Iface/Decl.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Iface/Load.hs
- compiler/GHC/Iface/Recomp.hs
- compiler/GHC/Iface/Syntax.hs
- compiler/GHC/Iface/Tidy.hs
- compiler/GHC/Iface/Type.hs
- compiler/GHC/IfaceToCore.hs
- compiler/GHC/Linker/Loader.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Errors/Types.hs
- compiler/GHC/Parser/Header.hs
- compiler/GHC/Parser/Lexer.x
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Parser/PostProcess/Haddock.hs
- compiler/GHC/Parser/String.hs
- compiler/GHC/Platform/LoongArch64.hs → compiler/GHC/Platform/LA64.hs
- compiler/GHC/Platform/Regs.hs
- compiler/GHC/Rename/Bind.hs
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Rename/Expr.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/Rename/Module.hs
- compiler/GHC/Rename/Names.hs
- compiler/GHC/Rename/Splice.hs
- compiler/GHC/Rename/Unbound.hs
- compiler/GHC/Rename/Utils.hs
- compiler/GHC/Runtime/Context.hs
- compiler/GHC/Runtime/Debugger/Breakpoints.hs
- compiler/GHC/Runtime/Eval.hs
- compiler/GHC/Runtime/Interpreter.hs
- compiler/GHC/Runtime/Loader.hs
- compiler/GHC/Stg/EnforceEpt/Types.hs
- compiler/GHC/StgToByteCode.hs
- compiler/GHC/StgToJS/Linker/Linker.hs
- compiler/GHC/SysTools/Ar.hs
- compiler/GHC/SysTools/Cpp.hs
- compiler/GHC/Tc/Deriv/Generate.hs
- compiler/GHC/Tc/Deriv/Utils.hs
- compiler/GHC/Tc/Errors.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Default.hs
- compiler/GHC/Tc/Gen/Export.hs
- compiler/GHC/Tc/Gen/Expr.hs
- compiler/GHC/Tc/Gen/Head.hs
- compiler/GHC/Tc/Gen/HsType.hs
- compiler/GHC/Tc/Gen/Match.hs
- compiler/GHC/Tc/Gen/Pat.hs
- compiler/GHC/Tc/Gen/Splice.hs
- compiler/GHC/Tc/Gen/Splice.hs-boot
- compiler/GHC/Tc/Instance/Family.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Tc/Plugin.hs
- compiler/GHC/Tc/Solver.hs
- compiler/GHC/Tc/Solver/Default.hs
- compiler/GHC/Tc/Solver/Dict.hs
- compiler/GHC/Tc/Solver/Equality.hs
- compiler/GHC/Tc/Solver/InertSet.hs
- compiler/GHC/Tc/Solver/Monad.hs
- compiler/GHC/Tc/Solver/Rewrite.hs
- compiler/GHC/Tc/Solver/Solve.hs
- compiler/GHC/Tc/TyCl.hs
- compiler/GHC/Tc/TyCl/Build.hs
- compiler/GHC/Tc/TyCl/Instance.hs
- compiler/GHC/Tc/TyCl/Utils.hs
- compiler/GHC/Tc/Types.hs
- compiler/GHC/Tc/Types/Constraint.hs
- compiler/GHC/Tc/Types/ErrCtxt.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Types/LclEnv.hs
- compiler/GHC/Tc/Types/Origin.hs
- compiler/GHC/Tc/Types/TH.hs
- compiler/GHC/Tc/Utils/Backpack.hs
- compiler/GHC/Tc/Utils/Concrete.hs
- compiler/GHC/Tc/Utils/Env.hs
- compiler/GHC/Tc/Utils/Instantiate.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/Tc/Utils/TcType.hs
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/Tc/Validity.hs
- compiler/GHC/Tc/Zonk/TcType.hs
- compiler/GHC/Tc/Zonk/Type.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/Basic.hs
- compiler/GHC/Types/DefaultEnv.hs
- compiler/GHC/Types/Error.hs
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/Hint.hs
- compiler/GHC/Types/Hint/Ppr.hs
- compiler/GHC/Types/Id/Make.hs
- compiler/GHC/Types/Name/Occurrence.hs
- compiler/GHC/Types/Name/Ppr.hs
- compiler/GHC/Types/Name/Reader.hs
- + compiler/GHC/Types/ThLevelIndex.hs
- compiler/GHC/Types/Unique.hs
- compiler/GHC/Types/Var.hs-boot
- compiler/GHC/Unit/Env.hs
- compiler/GHC/Unit/Home/Graph.hs
- compiler/GHC/Unit/Home/PackageTable.hs
- compiler/GHC/Unit/Module/Deps.hs
- compiler/GHC/Unit/Module/Graph.hs
- compiler/GHC/Unit/Module/Imported.hs
- compiler/GHC/Unit/Module/ModSummary.hs
- + compiler/GHC/Unit/Module/Stage.hs
- compiler/GHC/Unit/Types.hs
- compiler/GHC/Utils/Binary.hs
- compiler/GHC/Utils/Outputable.hs
- compiler/GHC/Utils/Panic.hs
- compiler/GHC/Utils/Panic/Plain.hs
- compiler/Language/Haskell/Syntax/Decls.hs
- compiler/Language/Haskell/Syntax/Expr.hs
- compiler/Language/Haskell/Syntax/Extension.hs
- compiler/Language/Haskell/Syntax/ImpExp.hs
- + compiler/Language/Haskell/Syntax/ImpExp/IsBoot.hs
- compiler/Language/Haskell/Syntax/Module/Name.hs
- compiler/Language/Haskell/Syntax/Pat.hs
- compiler/ghc.cabal.in
- configure.ac
- distrib/configure.ac.in
- docs/users_guide/9.14.1-notes.rst
- docs/users_guide/exts/control.rst
- docs/users_guide/exts/data_kinds.rst
- docs/users_guide/exts/explicit_namespaces.rst
- docs/users_guide/exts/gadt_syntax.rst
- docs/users_guide/exts/instances.rst
- docs/users_guide/exts/pattern_synonyms.rst
- docs/users_guide/exts/required_type_arguments.rst
- docs/users_guide/exts/template_haskell.rst
- docs/users_guide/ghci.rst
- docs/users_guide/javascript.rst
- docs/users_guide/phases.rst
- docs/users_guide/using-warnings.rst
- docs/users_guide/using.rst
- ghc/GHCi/UI.hs
- ghc/GHCi/UI/Exception.hs
- ghc/GHCi/UI/Info.hs
- ghc/GHCi/UI/Monad.hs
- ghc/Main.hs
- ghc/ghc-bin.cabal.in
- hadrian/README.md
- hadrian/bindist/config.mk.in
- hadrian/cfg/default.host.target.in
- hadrian/cfg/default.target.in
- hadrian/cfg/system.config.in
- hadrian/doc/flavours.md
- hadrian/doc/user-settings.md
- hadrian/hadrian.cabal
- hadrian/src/Builder.hs
- hadrian/src/Context.hs
- hadrian/src/Context/Path.hs
- hadrian/src/Flavour.hs
- hadrian/src/Flavour/Type.hs
- hadrian/src/Oracles/Flag.hs
- hadrian/src/Oracles/Setting.hs
- hadrian/src/Rules/BinaryDist.hs
- hadrian/src/Rules/Generate.hs
- hadrian/src/Settings/Builders/Ghc.hs
- hadrian/src/Settings/Builders/RunTest.hs
- hadrian/src/Settings/Default.hs
- hadrian/src/Settings/Flavours/Release.hs
- hadrian/src/Settings/Packages.hs
- hadrian/src/Settings/Warnings.hs
- hadrian/stack.yaml
- hadrian/stack.yaml.lock
- libffi-tarballs
- libraries/Cabal
- libraries/Win32
- libraries/base/changelog.md
- libraries/base/src/Control/Exception/Backtrace.hs
- libraries/base/src/GHC/JS/Prim/Internal/Build.hs
- libraries/base/src/System/CPUTime/Windows.hsc
- libraries/base/tests/IO/Makefile
- libraries/base/tests/IO/withBinaryFile002.stderr
- libraries/base/tests/IO/withFile002.stderr
- libraries/base/tests/IO/withFileBlocking002.stderr
- libraries/base/tests/perf/encodingAllocations.hs
- libraries/containers
- libraries/directory
- libraries/ghc-boot-th/GHC/Boot/TH/Ppr.hs
- libraries/ghc-boot/ghc-boot.cabal.in
- libraries/ghc-heap/ghc-heap.cabal.in
- libraries/ghc-internal/jsbits/base.js
- libraries/ghc-internal/jsbits/errno.js
- libraries/ghc-internal/src/GHC/Internal/Bignum/Integer.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/Fail.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Maybe.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Typeable/Internal.hs
- libraries/ghc-internal/src/GHC/Internal/Exception/Backtrace.hs
- libraries/ghc-internal/src/GHC/Internal/Exception/Type.hs-boot
- libraries/ghc-internal/src/GHC/Internal/IO.hs-boot
- libraries/ghc-internal/src/GHC/Internal/IO/Exception.hs-boot
- libraries/ghc-internal/src/GHC/Internal/LanguageExtensions.hs
- libraries/ghc-internal/src/GHC/Internal/System/Posix/Internals.hs
- libraries/ghc-internal/src/GHC/Internal/Type/Reflection.hs
- libraries/ghc-internal/src/GHC/Internal/TypeLits.hs
- libraries/ghc-internal/src/GHC/Internal/TypeNats.hs
- libraries/ghc-internal/src/GHC/Internal/Wasm/Prim/Types.hs
- libraries/ghc-internal/tools/ucd2haskell/ucd2haskell.cabal
- libraries/ghci/GHCi/Message.hs
- libraries/ghci/GHCi/Run.hs
- libraries/ghci/ghci.cabal.in
- libraries/haskeline
- libraries/hpc
- libraries/process
- libraries/template-haskell/Language/Haskell/TH/Syntax.hs
- libraries/template-haskell/changelog.md
- libraries/unix
- linters/lint-whitespace/lint-whitespace.cabal
- llvm-targets
- m4/fp_cc_supports_target.m4
- m4/fp_gcc_supports_no_pie.m4
- m4/fp_settings.m4
- m4/fp_setup_windows_toolchain.m4
- m4/fptools_set_c_ld_flags.m4
- m4/fptools_set_platform_vars.m4
- m4/ghc_tables_next_to_code.m4
- m4/ghc_toolchain.m4
- m4/prep_target_file.m4
- rts/Disassembler.c
- rts/Exception.cmm
- rts/Hash.c
- rts/Hash.h
- rts/Interpreter.c
- rts/Linker.c
- rts/LinkerInternals.h
- rts/PathUtils.c
- rts/PathUtils.h
- rts/PrimOps.cmm
- rts/RtsUtils.c
- rts/StgCRun.c
- rts/include/rts/Bytecodes.h
- rts/include/rts/storage/Closures.h
- rts/include/stg/MachRegs.h
- rts/linker/Elf.c
- rts/linker/LoadArchive.c
- rts/linker/LoadNativeObjPosix.c
- rts/linker/MachO.c
- rts/linker/PEi386.c
- rts/linker/PEi386.h
- + rts/linker/ProddableBlocks.c
- + rts/linker/ProddableBlocks.h
- rts/rts.cabal
- rts/sm/Storage.h
- rts/win32/veh_excn.c
- testsuite/driver/testlib.py
- testsuite/ghc-config/ghc-config.hs
- testsuite/tests/ado/ado004.stderr
- testsuite/tests/annotations/should_fail/annfail03.stderr
- testsuite/tests/annotations/should_fail/annfail04.stderr
- testsuite/tests/annotations/should_fail/annfail06.stderr
- testsuite/tests/annotations/should_fail/annfail09.stderr
- testsuite/tests/bytecode/T22376/all.T
- + testsuite/tests/bytecode/T25975.hs
- + testsuite/tests/bytecode/T25975.stdout
- testsuite/tests/bytecode/all.T
- testsuite/tests/callarity/unittest/CallArity1.hs
- + testsuite/tests/cmm/should_run/T25601.hs
- + testsuite/tests/cmm/should_run/T25601.stdout
- + testsuite/tests/cmm/should_run/T25601a.cmm
- testsuite/tests/cmm/should_run/all.T
- + testsuite/tests/codeGen/should_run/T26061.hs
- + testsuite/tests/codeGen/should_run/T26061.stdout
- testsuite/tests/codeGen/should_run/all.T
- testsuite/tests/count-deps/CountDepsAst.stdout
- testsuite/tests/count-deps/CountDepsParser.stdout
- testsuite/tests/deSugar/should_run/DsDoExprFailMsg.stderr
- testsuite/tests/deSugar/should_run/DsMonadCompFailMsg.stderr
- + testsuite/tests/default/T25912.hs
- + testsuite/tests/default/T25912.stdout
- + testsuite/tests/default/T25912_helper.hs
- + testsuite/tests/default/T25914.hs
- + testsuite/tests/default/T25934.hs
- testsuite/tests/default/all.T
- testsuite/tests/default/default-fail03.stderr
- testsuite/tests/dependent/should_compile/T14729.stderr
- testsuite/tests/dependent/should_compile/T15743.stderr
- testsuite/tests/dependent/should_compile/T15743e.stderr
- testsuite/tests/dependent/should_fail/T11471.stderr
- testsuite/tests/dependent/should_fail/T13135_simple.stderr
- testsuite/tests/dependent/should_fail/T16326_Fail6.stderr
- testsuite/tests/deriving/should_compile/T14682.stderr
- testsuite/tests/determinism/determ021/determ021.stdout
- testsuite/tests/diagnostic-codes/codes.stdout
- testsuite/tests/driver/Makefile
- testsuite/tests/driver/RecompExports/RecompExports1.stderr
- testsuite/tests/driver/RecompExports/RecompExports4.stderr
- + testsuite/tests/driver/T4437.stdout
- testsuite/tests/driver/T8526/T8526.stdout
- testsuite/tests/driver/all.T
- testsuite/tests/driver/fat-iface/fat014.stdout
- testsuite/tests/driver/json.stderr
- testsuite/tests/driver/json2.stderr
- testsuite/tests/driver/json_warn.stderr
- testsuite/tests/driver/multipleHomeUnits/multiGHCi.stderr
- testsuite/tests/ffi/should_run/all.T
- testsuite/tests/gadt/T19847a.stderr
- + testsuite/tests/gadt/T23298.hs
- + testsuite/tests/gadt/T23298.stderr
- testsuite/tests/gadt/all.T
- + testsuite/tests/ghc-api/T26120.hs
- + testsuite/tests/ghc-api/T26120.stdout
- testsuite/tests/ghc-api/T6145.hs
- testsuite/tests/ghc-api/all.T
- testsuite/tests/ghc-api/annotations-literals/literals.hs
- testsuite/tests/ghc-api/annotations-literals/parsed.hs
- testsuite/tests/ghc-api/apirecomp001/myghc.hs
- testsuite/tests/ghc-api/fixed-nodes/FixedNodes.hs
- testsuite/tests/ghc-api/fixed-nodes/ModuleGraphInvariants.hs
- testsuite/tests/ghc-api/fixed-nodes/T1.hs
- testsuite/tests/ghc-api/fixed-nodes/all.T
- + testsuite/tests/ghci.debugger/scripts/break031/Makefile
- + testsuite/tests/ghci.debugger/scripts/break031/a/A.hs
- + testsuite/tests/ghci.debugger/scripts/break031/all.T
- + testsuite/tests/ghci.debugger/scripts/break031/b/B.hs
- + testsuite/tests/ghci.debugger/scripts/break031/break031a.script
- + testsuite/tests/ghci.debugger/scripts/break031/break031a.stdout
- + testsuite/tests/ghci.debugger/scripts/break031/break031b.script
- + testsuite/tests/ghci.debugger/scripts/break031/break031b.stderr
- + testsuite/tests/ghci.debugger/scripts/break031/break031b.stdout
- + testsuite/tests/ghci.debugger/scripts/break031/unitA
- + testsuite/tests/ghci.debugger/scripts/break031/unitB
- + testsuite/tests/ghci/all.T
- + testsuite/tests/ghci/ghci-mem-primops.hs
- + testsuite/tests/ghci/ghci-mem-primops.script
- + testsuite/tests/ghci/ghci-mem-primops.stdout
- testsuite/tests/ghci/linking/dyn/T3372.hs
- + testsuite/tests/ghci/prog-mhu001/Makefile
- + testsuite/tests/ghci/prog-mhu001/all.T
- + testsuite/tests/ghci/prog-mhu001/e/E.hs
- + testsuite/tests/ghci/prog-mhu001/prog-mhu001a.script
- + testsuite/tests/ghci/prog-mhu001/prog-mhu001a.stdout
- + testsuite/tests/ghci/prog-mhu001/prog-mhu001b.script
- + testsuite/tests/ghci/prog-mhu001/prog-mhu001b.stdout
- + testsuite/tests/ghci/prog-mhu001/prog-mhu001c.script
- + testsuite/tests/ghci/prog-mhu001/prog-mhu001c.stdout
- + testsuite/tests/ghci/prog-mhu001/prog-mhu001d.script
- + testsuite/tests/ghci/prog-mhu001/prog-mhu001d.stdout
- + testsuite/tests/ghci/prog-mhu001/prog-mhu001e.script
- + testsuite/tests/ghci/prog-mhu001/prog-mhu001e.stdout
- + testsuite/tests/ghci/prog-mhu001/prog-mhu001f.script
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- + testsuite/tests/typecheck/should_compile/T26020a_help.hs
- + testsuite/tests/typecheck/should_compile/T26030.hs
- testsuite/tests/typecheck/should_compile/T7050.stderr
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- testsuite/tests/typecheck/should_compile/TypeRepCon.hs
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- testsuite/tests/wcompat-warnings/Template.hs
- + testsuite/tests/wcompat-warnings/WCompatWarningsOn.stderr
- utils/check-exact/ExactPrint.hs
- utils/count-deps/Main.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/Cc.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/Hyperlinker/Parser.hs
- utils/haddock/haddock-api/src/Haddock/Backends/LaTeX.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Decl.hs
- utils/haddock/haddock-api/src/Haddock/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
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- 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
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- utils/hpc
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The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/12416a1826969ee3d309e026d0970e…
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[Git][ghc/ghc][wip/T23109] Slight improvement to pre/postInlineUnconditionally
by Simon Peyton Jones (＠simonpj) 25 Jun '25
by Simon Peyton Jones (＠simonpj) 25 Jun '25
25 Jun '25
Simon Peyton Jones pushed to branch wip/T23109 at Glasgow Haskell Compiler / GHC
Commits:
b0ceb856 by Simon Peyton Jones at 2025-06-25T12:47:37+01:00
Slight improvement to pre/postInlineUnconditionally
Avoids an extra simplifier iteration
- - - - -
1 changed file:
- compiler/GHC/Core/Opt/Simplify/Utils.hs
Changes:
=====================================
compiler/GHC/Core/Opt/Simplify/Utils.hs
=====================================
@@ -1494,6 +1494,7 @@ preInlineUnconditionally env top_lvl bndr rhs rhs_env
-- so substituting rhs inside a lambda doesn't change the occ info.
-- Sadly, not quite the same as exprIsHNF.
canInlineInLam (Lit _) = True
+ canInlineInLam (Cast e _) = canInlineInLam e
canInlineInLam (Lam b e) = isRuntimeVar b || canInlineInLam e
canInlineInLam (Tick t e) = not (tickishIsCode t) && canInlineInLam e
canInlineInLam (Var v) = case idOccInfo v of
@@ -1612,7 +1613,7 @@ postInlineUnconditionally env bind_cxt old_bndr bndr rhs
-- so inlining duplicates code but nothing more
| otherwise
- -> work_ok in_lam int_cxt && smallEnoughToInline uf_opts unfolding
+ -> work_ok in_lam int_cxt && (n_br == 1 || smallEnoughToInline uf_opts unfolding)
-- Multiple syntactic occurences; but lazy, and small enough to dup
-- ToDo: consider discount on smallEnoughToInline if int_cxt is true
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/b0ceb8566e4d2c8817e5b556cf2a938…
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25 Jun '25
Rodrigo Mesquita pushed new branch wip/romes/step-out-6 at Glasgow Haskell Compiler / GHC
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25 Jun '25
Rodrigo Mesquita pushed new branch wip/romes/step-out-7 at Glasgow Haskell Compiler / GHC
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[Git][ghc/ghc][wip/fendor/no-load] Implement `-fno-load-initial-targets` flag
by Hannes Siebenhandl (＠fendor) 25 Jun '25
by Hannes Siebenhandl (＠fendor) 25 Jun '25
25 Jun '25
Hannes Siebenhandl pushed to branch wip/fendor/no-load at Glasgow Haskell Compiler / GHC
Commits:
082172b7 by fendor at 2025-06-25T09:26:59+02:00
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`.
- - - - -
35 changed files:
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Unit/Module/Graph.hs
- docs/users_guide/ghci.rst
- ghc/GHCi/UI.hs
- ghc/GHCi/UI/Exception.hs
- + 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/all.T
- − testsuite/tests/ghci/prog021/prog021.T
- testsuite/tests/ghci/prog021/prog021.script → testsuite/tests/ghci/prog021/prog021a.script
- testsuite/tests/ghci/prog021/prog021.stderr → testsuite/tests/ghci/prog021/prog021a.stderr
- testsuite/tests/ghci/prog021/prog021.stdout → 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
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