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[Git][ghc/ghc][wip/backports-9.14] 3 commits: testsuite: Accept new base-exports output
by Ben Gamari (＠bgamari) 27 Oct '25

27 Oct '25

Ben Gamari pushed to branch wip/backports-9.14 at Glasgow Haskell Compiler / GHC Commits: abb1e151 by Ben Gamari at 2025-10-27T07:36:13-04:00 testsuite: Accept new base-exports output - - - - - 29030795 by Ben Gamari at 2025-10-27T07:36:13-04:00 template-haskell: Accept T15321 - - - - - dcd0fb6c by Ben Gamari at 2025-10-27T07:36:13-04:00 testsuite: Accept new template-haskell-exports output - - - - - 8 changed files: - testsuite/tests/interface-stability/base-exports.stdout - testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs - testsuite/tests/interface-stability/base-exports.stdout-mingw32 - testsuite/tests/interface-stability/base-exports.stdout-ws-32 - testsuite/tests/interface-stability/ghc-experimental-exports.stdout - testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32 - testsuite/tests/interface-stability/template-haskell-exports.stdout - testsuite/tests/th/T15321.stderr The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/405c23152363c36837fcce88dae24c… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/405c23152363c36837fcce88dae24c… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/T23162-spj] Accept error message wibbles
by Simon Peyton Jones (＠simonpj) 27 Oct '25

27 Oct '25

Simon Peyton Jones pushed to branch wip/T23162-spj at Glasgow Haskell Compiler / GHC Commits: 41c46970 by Simon Peyton Jones at 2025-10-27T11:00:31+00:00 Accept error message wibbles - - - - - 10 changed files: - testsuite/tests/count-deps/CountDepsAst.stdout - testsuite/tests/count-deps/CountDepsParser.stdout - testsuite/tests/parser/should_fail/RecordDotSyntaxFail10.stderr - testsuite/tests/parser/should_fail/RecordDotSyntaxFail13.stderr - testsuite/tests/partial-sigs/should_fail/T14584a.stderr - testsuite/tests/rep-poly/T13233.stderr - testsuite/tests/rep-poly/T14561b.stderr - testsuite/tests/rep-poly/T19709b.stderr - testsuite/tests/rep-poly/T23903.stderr - testsuite/tests/typecheck/should_compile/T25266a.stderr Changes: ===================================== testsuite/tests/count-deps/CountDepsAst.stdout ===================================== @@ -212,6 +212,7 @@ GHC.Utils.CliOption GHC.Utils.Constants GHC.Utils.Containers.Internal.BitUtil GHC.Utils.Containers.Internal.StrictPair +GHC.Utils.EndoOS GHC.Utils.Error GHC.Utils.Exception GHC.Utils.FV ===================================== testsuite/tests/count-deps/CountDepsParser.stdout ===================================== @@ -241,6 +241,7 @@ GHC.Utils.CliOption GHC.Utils.Constants GHC.Utils.Containers.Internal.BitUtil GHC.Utils.Containers.Internal.StrictPair +GHC.Utils.EndoOS GHC.Utils.Error GHC.Utils.Exception GHC.Utils.FV ===================================== testsuite/tests/parser/should_fail/RecordDotSyntaxFail10.stderr ===================================== @@ -1,5 +1,6 @@ RecordDotSyntaxFail10.hs:40:11: error: [GHC-39999] • No instance for ‘HasField "quux" Quux String’ + NB: ‘HasField’ is not the built-in ‘GHC.Internal.Records.HasField’ class. • In the second argument of ‘($)’, namely ‘a {foo.bar.baz.quux}’ In a stmt of a 'do' block: print $ a {foo.bar.baz.quux} In the expression: ===================================== testsuite/tests/parser/should_fail/RecordDotSyntaxFail13.stderr ===================================== @@ -1,7 +1,7 @@ RecordDotSyntaxFail13.hs:26:11: error: [GHC-39999] • No instance for ‘HasField "foo" Foo (Foo -> Int)’ arising from a record update - (maybe you haven't applied a function to enough arguments?) + NB: ‘HasField’ is not the built-in ‘GHC.Internal.Records.HasField’ class. • In the second argument of ‘($)’, namely ‘a {foo}’ In a stmt of a 'do' block: print $ a {foo} In the expression: ===================================== testsuite/tests/partial-sigs/should_fail/T14584a.stderr ===================================== @@ -1,4 +1,3 @@ - T14584a.hs:12:5: warning: [GHC-83865] [-Wdeferred-type-errors (in -Wdefault)] • Couldn't match expected type ‘()’ with actual type ‘m -> m’ • Probable cause: ‘id @m :: _’ is applied to too few arguments @@ -17,7 +16,7 @@ T14584a.hs:12:9: warning: [GHC-25897] [-Wdeferred-type-errors (in -Wdefault)] T14584a.hs:12:14: warning: [GHC-88464] [-Wpartial-type-signatures (in -Wdefault)] • Found type wildcard ‘_’ standing for ‘m -> m’ - Where: ‘m’, ‘k’ are rigid type variables bound by + Where: ‘k’, ‘m’ are rigid type variables bound by the type signature for: f :: forall {k} (m :: k). () at T14584a.hs:11:1-17 @@ -44,3 +43,4 @@ T14584a.hs:16:8: warning: [GHC-83865] [-Wdeferred-type-errors (in -Wdefault)] In the expression: let h = id @m in h In an equation for ‘g’: g = let h = id @m in h • Relevant bindings include h :: m -> m (bound at T14584a.hs:15:9) + ===================================== testsuite/tests/rep-poly/T13233.stderr ===================================== @@ -2,20 +2,20 @@ T13233.hs:14:11: error: [GHC-55287] • • The first component of the unboxed tuple does not have a fixed runtime representation. Its type is: - a1 :: TYPE k2 + a1 :: TYPE k1 When unifying: • a1 -> b1 -> (# a1, b1 #) • a -> a -> (# a, a #) - Cannot unify ‘rep’ with the type variable ‘k2’ + Cannot unify ‘rep’ with the type variable ‘k1’ because the former is not a concrete ‘RuntimeRep’. • The second component of the unboxed tuple does not have a fixed runtime representation. Its type is: - b1 :: TYPE k1 + b1 :: TYPE k2 When unifying: • a1 -> b1 -> (# a1, b1 #) • a -> a -> (# a, a #) - Cannot unify ‘rep’ with the type variable ‘k1’ + Cannot unify ‘rep’ with the type variable ‘k2’ because the former is not a concrete ‘RuntimeRep’. • In the first argument of ‘bar’, namely ‘(#,#)’ In the expression: bar (#,#) ===================================== testsuite/tests/rep-poly/T14561b.stderr ===================================== @@ -2,9 +2,9 @@ T14561b.hs:12:9: error: [GHC-55287] • The first argument of ‘coerce’ does not have a fixed runtime representation. Its type is: - b0 :: TYPE k0 + a0 :: TYPE k0 When unifying: - • b0 -> b0 + • a0 -> b0 • a -> a Cannot unify ‘r’ with the type variable ‘k0’ because the former is not a concrete ‘RuntimeRep’. ===================================== testsuite/tests/rep-poly/T19709b.stderr ===================================== @@ -2,7 +2,7 @@ T19709b.hs:11:15: error: [GHC-55287] • The argument ‘(error @Any "e2")’ of ‘levfun’ does not have a fixed runtime representation. Its type is: - a1 :: TYPE c0 + a0 :: TYPE c0 Cannot unify ‘Any’ with the type variable ‘c0’ because the former is not a concrete ‘RuntimeRep’. • In the first argument of ‘levfun’, namely ‘(error @Any "e2")’ ===================================== testsuite/tests/rep-poly/T23903.stderr ===================================== @@ -2,7 +2,7 @@ T23903.hs:21:1: error: [GHC-55287] • The first pattern in the equation for ‘f’ does not have a fixed runtime representation. Its type is: - t0 :: TYPE c0 + Unbox a :: TYPE c0 Cannot unify ‘Rep a’ with the type variable ‘c0’ because the former is not a concrete ‘RuntimeRep’. • The equation for ‘f’ has one visible argument, ===================================== testsuite/tests/typecheck/should_compile/T25266a.stderr ===================================== @@ -1,4 +1,4 @@ -T25266a.hs:10:39: error: [GHC-25897] +T25266a.hs:10:41: error: [GHC-25897] • Could not deduce ‘p2 ~ p1’ from the context: a ~ Int bound by a pattern with constructor: T1 :: T Int, @@ -10,7 +10,7 @@ T25266a.hs:10:39: error: [GHC-25897] ‘p1’ is a rigid type variable bound by the inferred type of f :: p1 -> p2 -> T a -> Int at T25266a.hs:(9,1)-(11,40) - • In the expression: x + • In the expression: y In the first argument of ‘length’, namely ‘[x, y]’ In the expression: length [x, y] • Relevant bindings include View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/41c46970eb4c85a63ed87a6e432dfb3… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/41c46970eb4c85a63ed87a6e432dfb3… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/T26514
by Simon Peyton Jones (＠simonpj) 27 Oct '25

27 Oct '25

Simon Peyton Jones pushed new branch wip/T26514 at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/T26514 You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/T26349] Comments and one test wibble
by Simon Peyton Jones (＠simonpj) 27 Oct '25

27 Oct '25

Simon Peyton Jones pushed to branch wip/T26349 at Glasgow Haskell Compiler / GHC Commits: 076f9021 by Simon Peyton Jones at 2025-10-27T10:51:28+00:00 Comments and one test wibble - - - - - 3 changed files: - compiler/GHC/Tc/Types/Evidence.hs - compiler/GHC/Tc/Utils/Unify.hs - testsuite/tests/simplCore/should_compile/rule2.stderr Changes: ===================================== compiler/GHC/Tc/Types/Evidence.hs ===================================== @@ -188,6 +188,40 @@ that it is a no-op. Here's our solution (DSST3) When desugaring, try eta-reduction on the payload of a WpSubType. This is done in `GHC.HsToCore.Binds.dsHsWrapper` by the call to `optSubTypeHsWrapper`. + +Note [Smart contructor for WpFun] +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +In `matchExpectedFunTys` (and the moribund `matchActualFunTys`) we use the smart +constructor `mkWpFun` to optimise away a `WpFun`. This is important (T1753b, T15105). +Suppose we have `type instance F Int = Type`, and we are typechecking this: + (\x. True) :: (a :: F Int) -> a +We cannot desugar this to + \(x::a::F Int). True +because then `x` does not have a fixed runtime representation. +See Note [Representation polymorphism invariants] in GHC.Core. + +So we must cast the entire lambda first. We want to end up with + (\(x::(a |> kco). x) |> (FunCo co <Bool>) +where + kco :: F Int ~ Type = ... -- From the type instance + co :: (a |> kco) ~ a = GRefl a kco +Note that we /cast/ the lambda with a /coercion/. We must not +/wrap/ it in a /WpFun/ because the latter generates a lambda that won't obey +the runtime-rep rules. + +The check is done by the `hasFixedRuntimeRep` magic in `matchExpectedFunTys`. + +QUESTIONS: + +* What happens if we can't build a cast? What error is produced, and how? + +* What about mkWpFun (WpCast co) (WpTyLam ...), which might arise from + (a :: F Int -> forall b. b->b) + Will we generate a cast and then a WpFun. Surely we should? + Test case? + +* I think it's really only matchExpectedFunTys that is implicated here. + (Apart from matchActualFunTys.) Anything else? -} -- We write wrap :: t1 ~> t2 @@ -276,20 +310,31 @@ WpCast c1 <.> WpCast c2 = WpCast (c2 `mkTransCo` c1) -- This is thus the same as WpCast (c2 ; c1) and not WpCast (c1 ; c2). c1 <.> c2 = c1 `WpCompose` c2 --- | Smart constructor to create a 'WpFun' 'HsWrapper', which avoids introducing --- a lambda abstraction if the two supplied wrappers are either identities or --- casts. --- --- PRECONDITION: either: --- --- 1. both of the 'HsWrapper's are identities or casts, or --- 2. both the "from" and "to" types of the first wrapper have a syntactically --- fixed RuntimeRep (see Note [Fixed RuntimeRep] in GHC.Tc.Utils.Concrete). mkWpFun :: HsWrapper -> HsWrapper -> Scaled TcTypeFRR -- ^ the "from" type of the first wrapper -> TcType -- ^ Either "from" type or "to" type of the second wrapper -- (used only when the second wrapper is the identity) -> HsWrapper +-- ^ Smart constructor to create a 'WpFun' 'HsWrapper' +-- See Note [Smart contructor for WpFun] for why we need a smart constructor +-- +-- PRECONDITION: either: +-- +-- 1. Both of the 'HsWrapper's are WpHole or WpCast. +-- In this we optimise away the WpFun entirely +-- OR +-- 2. Both the "from" and "to" types of the first wrapper have a syntactically +-- fixed RuntimeRep (see Note [Fixed RuntimeRep] in GHC.Tc.Utils.Concrete). +-- If we retain the WpFun (i.e. not case 1), it will desugar to a lambda +-- \x. w_res[ e w_arg[x] ] +-- To satisfy Note [Representation polymorphism invariants] in GHC.Core, +-- it must be the case that both the lambda bound variable x and the function +-- argument w_arg[x] have a fixed runtime representation, i.e. that both the +-- "from" and "to" types of the first wrapper "w_arg" have a fixed runtime +-- representation. +-- +-- Unfortunately, we can't check precondition (2) with an assertion here, because of +-- [Wrinkle: Typed Template Haskell] in Note [hasFixedRuntimeRep] in GHC.Tc.Utils.Concrete. mkWpFun w1 w2 st1@(Scaled m1 t1) t2 = case (w1,w2) of (WpHole, WpHole) -> WpHole @@ -297,17 +342,6 @@ mkWpFun w1 w2 st1@(Scaled m1 t1) t2 (WpCast co1, WpHole) -> WpCast (mk_wp_fun_co m1 (mkSymCo co1) (mkRepReflCo t2)) (WpCast co1, WpCast co2) -> WpCast (mk_wp_fun_co m1 (mkSymCo co1) co2) (_, _) -> WpFun w1 w2 st1 t2 - -- In the WpFun case, we will desugar to a lambda - -- - -- \x. w_res[ e w_arg[x] ] - -- - -- To satisfy Note [Representation polymorphism invariants] in GHC.Core, - -- it must be the case that both the lambda bound variable x and the function - -- argument w_arg[x] have a fixed runtime representation, i.e. that both the - -- "from" and "to" types of the first wrapper "w_arg" have a fixed runtime representation. - -- - -- Unfortunately, we can't check this with an assertion here, because of - -- [Wrinkle: Typed Template Haskell] in Note [hasFixedRuntimeRep] in GHC.Tc.Utils.Concrete. mkWpSubType :: HsWrapper -> HsWrapper -- See (DSST2) in Note [Deep subsumption and WpSubType] ===================================== compiler/GHC/Tc/Utils/Unify.hs ===================================== @@ -248,6 +248,8 @@ matchActualFunTys :: ExpectedFunTyOrigin -- ^ See Note [Herald for matchExpected -> Arity -> TcSigmaType -> TcM (HsWrapper, [Scaled TcSigmaTypeFRR], TcRhoType) +-- NB: Called only from `tcSynArgA`, and hence scheduled for destruction +-- -- If matchActualFunTys n fun_ty = (wrap, [t1,..,tn], res_ty) -- then wrap : fun_ty ~> (t1 -> ... -> tn -> res_ty) -- and res_ty is a RhoType @@ -868,6 +870,7 @@ matchExpectedFunTys herald ctx arity (Check top_ty) thing_inside res_ty ; let wrap_arg = mkWpCastN arg_co fun_wrap = mkWpFun wrap_arg wrap_res (Scaled mult arg_ty) res_ty + -- mkWpFun: see Note [Smart contructor for WpFun] in GHC.Tc.Types.Evidence ; return (fun_wrap, result) } ---------------------------- ===================================== testsuite/tests/simplCore/should_compile/rule2.stderr ===================================== @@ -10,18 +10,15 @@ ==================== Grand total simplifier statistics ==================== -Total ticks: 13 +Total ticks: 11 -2 PreInlineUnconditionally - 1 ds - 1 f +1 PreInlineUnconditionally 1 f 2 UnfoldingDone 1 GHC.Internal.Base.id 1 Roman.bar 1 RuleFired 1 foo/bar 1 LetFloatFromLet 1 -7 BetaReduction - 1 ds +6 BetaReduction 1 f 1 a 1 m View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/076f9021e43c04f875ae48f735ad9dc… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/076f9021e43c04f875ae48f735ad9dc… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/T26521] 2 commits: ghc-toolchain: detect PowerPC 64 bit ABI
by Peter Trommler (＠trommler) 27 Oct '25

27 Oct '25

Peter Trommler pushed to branch wip/T26521 at Glasgow Haskell Compiler / GHC Commits: 858a19f2 by Peter Trommler at 2025-10-27T10:21:20+01:00 ghc-toolchain: detect PowerPC 64 bit ABI Check preprocessor macro defined for ABI v2 and assume v1 otherwise. Fixes #26521 - - - - - 79f5d7e2 by Peter Trommler at 2025-10-27T10:23:10+01:00 ghc-toolchain: refactor, move lastLine to Utils - - - - - 5 changed files: - utils/ghc-toolchain/ghc-toolchain.cabal - utils/ghc-toolchain/src/GHC/Toolchain/CheckArm.hs - + utils/ghc-toolchain/src/GHC/Toolchain/CheckPower.hs - utils/ghc-toolchain/src/GHC/Toolchain/ParseTriple.hs - utils/ghc-toolchain/src/GHC/Toolchain/Utils.hs Changes: ===================================== utils/ghc-toolchain/ghc-toolchain.cabal ===================================== @@ -21,6 +21,7 @@ library GHC.Toolchain.NormaliseTriple, GHC.Toolchain.CheckArm, GHC.Toolchain.Target, + GHC.Toolchain.CheckPower GHC.Toolchain.Tools.Ar, GHC.Toolchain.Tools.Cc, GHC.Toolchain.Tools.Cxx, ===================================== utils/ghc-toolchain/src/GHC/Toolchain/CheckArm.hs ===================================== @@ -8,6 +8,7 @@ import System.Process import GHC.Platform.ArchOS import GHC.Toolchain.Prelude +import GHC.Toolchain.Utils (lastLine) import GHC.Toolchain.Tools.Cc -- | Awkwardly, ARM triples sometimes contain insufficient information about @@ -75,10 +76,6 @@ findArmIsa cc = do "False" -> return False _ -> throwE $ "unexpected output from test program: " ++ out -lastLine :: String -> String -lastLine "" = "" -lastLine s = last $ lines s - -- | Raspbian unfortunately makes some extremely questionable packaging -- decisions, configuring gcc to compile for ARMv6 despite the fact that the -- Raspberry Pi 4 is ARMv8. As ARMv8 doesn't support all instructions supported ===================================== utils/ghc-toolchain/src/GHC/Toolchain/CheckPower.hs ===================================== @@ -0,0 +1,29 @@ +module GHC.Toolchain.CheckPower ( checkPowerAbi ) where + +import GHC.Platform.ArchOS + +import GHC.Toolchain.Prelude +import GHC.Toolchain.Utils (lastLine) +import GHC.Toolchain.Tools.Cc + +-- 64-Bit ELF V2 ABI Specification, Power Architecture, Revision 1.5 says: +-- A C preprocessor that conforms to this ABI shall predefine the macro +-- _CALL_ELF to have a value of 2 (Section 5.1.4 Predifined Macros). +-- The 64-bit PowerPC ELF Application Binary Interface Supplement 1.9 +-- does not define any macro to identify the ABI. +-- So we check for ABI version 2 and default to ABI version 1. + +checkPowerAbi :: Cc -> M Arch +checkPowerAbi cc = do + checking "POWER ELF ABI" $ do + out <- fmap lastLine $ preprocess cc $ unlines + [ "#if defined(_CALL_ELF) && _CALL_ELF == 2" + , "ELFv2" + , "#else" + , "ELFv1" + , "#endif" + ] + case out of + "ELFv1" -> pure $ ArchPPC_64 ELF_V1 + "ELFv2" -> pure $ ArchPPC_64 ELF_V2 + _ -> throwE $ "unexpected output from test program: " ++ out ===================================== utils/ghc-toolchain/src/GHC/Toolchain/ParseTriple.hs ===================================== @@ -6,6 +6,7 @@ import GHC.Platform.ArchOS import GHC.Toolchain.Prelude import GHC.Toolchain.CheckArm +import GHC.Toolchain.CheckPower import GHC.Toolchain.Tools.Cc -- | Parse a triple `arch-vendor-os` into an 'ArchOS' and a vendor name 'String' @@ -40,7 +41,7 @@ parseArch cc arch = "x86_64" -> pure ArchX86_64 "amd64" -> pure ArchX86_64 "powerpc" -> pure ArchPPC - "powerpc64" -> pure (ArchPPC_64 ELF_V1) + "powerpc64" -> checkPowerAbi cc "powerpc64le" -> pure (ArchPPC_64 ELF_V2) "s390x" -> pure ArchS390X "arm" -> findArmIsa cc ===================================== utils/ghc-toolchain/src/GHC/Toolchain/Utils.hs ===================================== @@ -8,6 +8,7 @@ module GHC.Toolchain.Utils , oneOf , oneOf' , isSuccess + , lastLine ) where import Control.Exception @@ -65,3 +66,6 @@ isSuccess = \case ExitSuccess -> True ExitFailure _ -> False +lastLine :: String -> String +lastLine "" = "" +lastLine s = last $ lines s View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/cf9d958f5ed1bebd6f5ff757a6078c… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/cf9d958f5ed1bebd6f5ff757a6078c… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/int-index/reexport-ghc-hs-basic] 4 commits: Add SIMD primops for bitwise logical operations
by Vladislav Zavialov (＠int-index) 27 Oct '25

27 Oct '25

Vladislav Zavialov pushed to branch wip/int-index/reexport-ghc-hs-basic at Glasgow Haskell Compiler / GHC Commits: 6ef22fa0 by IC Rainbow at 2025-10-26T18:23:01-04:00 Add SIMD primops for bitwise logical operations This adds 128-bit wide and/or/xor instructions for X86 NCG, with both SSE and AVX encodings. ``` andFloatX4# :: FloatX4# -> FloatX4# -> FloatX4# -- andps / vandps andDoubleX2# :: DoubleX2# -> DoubleX2# -> DoubleX2# -- andpd / vandpd andInt8X16# :: Int8X16# -> Int8X16# -> Int8X16# -- pand / vpand ``` The new primops are available on ARM when using LLVM backend. Tests added: - simd015 (floats and doubles) - simd016 (integers) - simd017 (words) Fixes #26417 - - - - - fbdc623a by sheaf at 2025-10-26T18:23:52-04:00 Add hints for unsolved HasField constraints This commit adds hints and explanations for unsolved 'HasField' constraints. GHC will now provide additional explanations for an unsolved constraint of the form 'HasField fld_name rec_ty fld_ty'; the details are laid out in Note [Error messages for unsolved HasField constraints], but briefly: 1. Provide similar name suggestions (e.g. mis-spelled field name) and import suggestions (record field not in scope). These result in actionable 'GhcHints', which is helpful to provide code actions in HLS. 2. Explain why GHC did not solve the constraint, e.g.: - 'fld_name' is not a string literal (e.g. a type variable) - 'rec_ty' is a TyCon without any fields, e.g. 'Int' or 'Bool'. - 'fld_ty' contains existentials variables or foralls. - The record field is a pattern synonym field (GHC does not generate HasField instances for those). - 'HasField' is a custom 'TyCon', not actually the built-in 'HasField' typeclass from 'GHC.Records'. On the way, we slightly refactor the mechanisms for import suggestions in GHC.Rename.Unbound. This is to account for the fact that, for 'HasField', we don't care whether the field is imported qualified or unqualified. 'importSuggestions' was refactored, we now have 'sameQualImportSuggestions' and 'anyQualImportSuggestions'. Fixes #18776 #22382 #26480 - - - - - 99d5707f by sheaf at 2025-10-26T18:23:52-04:00 Rename PatSyn MatchContext to PatSynCtx to avoid punning - - - - - ae5137f3 by Vladislav Zavialov at 2025-10-27T12:11:00+03:00 Re-export GHC.Hs.Basic from GHC.Hs Clean up some import sections in GHC by re-exporting GHC.Hs.Basic from GHC.Hs. - - - - - 80 changed files: - compiler/GHC/Builtin/primops.txt.pp - compiler/GHC/Cmm/MachOp.hs - compiler/GHC/CmmToAsm/AArch64/CodeGen.hs - compiler/GHC/CmmToAsm/X86/CodeGen.hs - compiler/GHC/CmmToAsm/X86/Instr.hs - compiler/GHC/CmmToAsm/X86/Ppr.hs - compiler/GHC/CmmToC.hs - compiler/GHC/CmmToLlvm/CodeGen.hs - compiler/GHC/Core/ConLike.hs - compiler/GHC/Hs.hs - compiler/GHC/Hs/Decls.hs - compiler/GHC/Hs/Expr.hs - compiler/GHC/HsToCore/Foreign/Wasm.hs - compiler/GHC/HsToCore/Pmc/Utils.hs - compiler/GHC/HsToCore/Quote.hs - compiler/GHC/HsToCore/Utils.hs - compiler/GHC/Parser/Errors/Types.hs - compiler/GHC/Parser/PostProcess.hs - compiler/GHC/Rename/Bind.hs - compiler/GHC/Rename/Env.hs - compiler/GHC/Rename/Expr.hs - compiler/GHC/Rename/HsType.hs - compiler/GHC/Rename/Names.hs - compiler/GHC/Rename/Pat.hs - compiler/GHC/Rename/Unbound.hs - compiler/GHC/Rename/Utils.hs - compiler/GHC/StgToCmm/Prim.hs - compiler/GHC/StgToJS/Prim.hs - compiler/GHC/Tc/Deriv/Generate.hs - compiler/GHC/Tc/Deriv/Generics.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/Expr.hs - compiler/GHC/Tc/Gen/Pat.hs - compiler/GHC/Tc/Instance/Class.hs - compiler/GHC/Tc/TyCl.hs - compiler/GHC/Tc/TyCl/Instance.hs - compiler/GHC/Tc/TyCl/PatSyn.hs - compiler/GHC/Tc/TyCl/Utils.hs - compiler/GHC/Tc/Types/Origin.hs - compiler/GHC/Tc/Validity.hs - compiler/GHC/ThToHs.hs - compiler/GHC/Types/Hint.hs - compiler/GHC/Types/Hint/Ppr.hs - compiler/Language/Haskell/Syntax/Expr.hs - docs/users_guide/9.16.1-notes.rst - libraries/base/src/GHC/Base.hs - libraries/base/src/GHC/Exts.hs - libraries/ghc-experimental/CHANGELOG.md - libraries/ghc-prim/changelog.md - testsuite/tests/interface-stability/ghc-experimental-exports.stdout - testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32 - testsuite/tests/interface-stability/ghc-prim-exports.stdout - testsuite/tests/interface-stability/ghc-prim-exports.stdout-mingw32 - + testsuite/tests/overloadedrecflds/should_fail/T26480.hs - + testsuite/tests/overloadedrecflds/should_fail/T26480.stderr - + testsuite/tests/overloadedrecflds/should_fail/T26480_aux1.hs - + testsuite/tests/overloadedrecflds/should_fail/T26480_aux2.hs - + testsuite/tests/overloadedrecflds/should_fail/T26480b.hs - + testsuite/tests/overloadedrecflds/should_fail/T26480b.stderr - testsuite/tests/overloadedrecflds/should_fail/all.T - testsuite/tests/overloadedrecflds/should_fail/hasfieldfail01.stderr - testsuite/tests/overloadedrecflds/should_fail/hasfieldfail02.stderr - testsuite/tests/parser/should_fail/RecordDotSyntaxFail11.stderr - testsuite/tests/parser/should_fail/RecordDotSyntaxFail8.hs - testsuite/tests/parser/should_fail/RecordDotSyntaxFail8.stderr - testsuite/tests/rename/should_fail/T19843h.stderr - testsuite/tests/simd/should_run/all.T - + testsuite/tests/simd/should_run/simd015.hs - + testsuite/tests/simd/should_run/simd015.stdout - + testsuite/tests/simd/should_run/simd016.hs - + testsuite/tests/simd/should_run/simd016.stdout - + testsuite/tests/simd/should_run/simd017.hs - + testsuite/tests/simd/should_run/simd017.stdout - utils/check-exact/ExactPrint.hs - utils/haddock/haddock-api/src/Haddock/Convert.hs - utils/haddock/haddock-api/src/Haddock/Interface/Rename.hs - utils/haddock/haddock-api/src/Haddock/Types.hs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/51223e7ce07e4d25d7ac02603b275c… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/51223e7ce07e4d25d7ac02603b275c… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/fendor/ghc-sample-profiler] 48 commits: Improve how we detect user type errors in types
by Hannes Siebenhandl (＠fendor) 27 Oct '25

27 Oct '25

Hannes Siebenhandl pushed to branch wip/fendor/ghc-sample-profiler at Glasgow Haskell Compiler / GHC Commits: 7471eb6a by sheaf at 2025-10-07T21:39:43-04:00 Improve how we detect user type errors in types This commit cleans up all the code responsible for detecting whether a type contains "TypeError msg" applications nested inside it. All the logic is now in 'userTypeError_maybe', which is always deep. Whether it looks inside type family applications is determined by the passed-in boolean flag: - When deciding whether a constraint is definitely insoluble, don't look inside type family applications, as they may still reduce -- in which case the TypeError could disappear. - When reporting unsolved constraints, look inside type family applications: they had the chance to reduce but didn't, and the custom type error might contain valuable information. All the details are explained in Note [Custom type errors in constraints] in GHC.Tc.Types.Constraint. Another benefit of this change is that it allows us to get rid of the deeply dodgy 'getUserTypeErrorMsg' function. This commit also improves the detection of custom type errors, for example in equality constraints: TypeError blah ~# rhs It used to be the case that we didn't detect the TypeError on the LHS, because we never considered that equality constraints could be insoluble due to the presence of custom type errors. Addressing this oversight improves detection of redundant pattern match warnings, fixing #26400. - - - - - 29955267 by Rodrigo Mesquita at 2025-10-07T21:40:25-04:00 cleanup: Drop obsolete settings from config.mk.in These values used to be spliced into the bindist's `config.mk` s.t. when `make` was run, the values were read and written into the bindist installation `settings` file. However, we now carry these values to the bindist directly in the default.target toolchain file, and `make` writes almost nothing to `settings` now (see #26227) The entries deleted in this MR were already unused. Fixes #26478 - - - - - f7adfed2 by ARATA Mizuki at 2025-10-08T08:37:24-04:00 T22033 is only relevant if the word size is 64-bit Fixes #25497 - - - - - ff1650c9 by Ben Gamari at 2025-10-08T08:38:07-04:00 rts/posix: Enforce iteration limit on heap reservation logic Previously we could loop indefinitely when attempting to get an address space reservation for our heap. Limit the logic to 8 iterations to ensure we instead issue a reasonable error message. Addresses #26151. - - - - - 01844557 by Ben Gamari at 2025-10-08T08:38:07-04:00 rts/posix: Hold on to low reservations when reserving heap Previously when the OS gave us an address space reservation in low memory we would immediately release it and try again. However, on some platforms this meant that we would get the same allocation again in the next iteration (since mmap's `hint` argument is just that, a hint). Instead we now hold on to low reservations until we have found a suitable heap reservation. Fixes #26151. - - - - - b2c8d052 by Sven Tennie at 2025-10-08T08:38:47-04:00 Build terminfo only in upper stages in cross-builds (#26288) Currently, there's no way to provide library paths for [n]curses for both - build and target - in cross-builds. As stage0 is only used to build upper stages, it should be fine to build terminfo only for them. This re-enables building cross-compilers with terminfo. - - - - - c58f9a61 by Julian Ospald at 2025-10-08T08:39:36-04:00 ghc-toolchain: Drop `ld.gold` from merge object command It's deprecated. Also see #25716 - - - - - 2b8baada by sheaf at 2025-10-08T18:23:37-04:00 Improvements to 'mayLookIdentical' This commit makes significant improvements to the machinery that decides when we should pretty-print the "invisible bits" of a type, such as: - kind applications, e.g. '@k' in 'Proxy @k ty' - RuntimeReps, e.g. 'TYPE r' - multiplicities and linear arrows 'a %1 -> b' To do this, this commit refactors 'mayLookIdentical' to return **which** of the invisible bits don't match up, e.g. in (a %1 -> b) ~ (a %Many -> b) we find that the invisible bit that doesn't match up is a multiplicity, so we should set 'sdocLinearTypes = True' when pretty-printing, and with e.g. Proxy @k1 ~ Proxy @k2 we find that the invisible bit that doesn't match up is an invisible TyCon argument, so we set 'sdocPrintExplicitKinds = True'. We leverage these changes to remove the ad-hoc treatment of linearity of data constructors with 'dataConDisplayType' and 'dataConNonLinearType'. This is now handled by the machinery of 'pprWithInvisibleBits'. Fixes #26335 #26340 - - - - - 129ce32d by sheaf at 2025-10-08T18:23:37-04:00 Store SDoc context in SourceError This commits modifies the SourceError datatype which is used for throwing and then reporting exceptions by storing all the info we need to be able to print the SDoc, including whether we should print with explicit kinds, explicit runtime-reps, etc. This is done using the new datatype: data SourceErrorContext = SEC !DiagOpts !(DiagnosticOpts GhcMessage) Now, when we come to report an error (by handling the exception), we have access to the full context we need. Fixes #26387 - - - - - f9790ca8 by Ben Gamari at 2025-10-08T18:24:19-04:00 gitlab-ci: Make RELEASE_JOB an input Rather than an undocumented variable. - - - - - 14281a22 by Ben Gamari at 2025-10-11T14:06:47-04:00 rts/nonmoving: Fix comment spelling - - - - - bedd38b0 by Ben Gamari at 2025-10-11T14:06:47-04:00 rts/nonmoving: Use atomic operations to update bd->flags - - - - - 215d6841 by Ben Gamari at 2025-10-11T14:06:47-04:00 nonmoving: Use get_itbl instead of explicit loads This is cleaner and also fixes unnecessary (and unsound) use of `volatile`. - - - - - 2c94aa3a by Ben Gamari at 2025-10-11T14:06:47-04:00 rts/Scav: Handle WHITEHOLEs in scavenge_one `scavenge_one`, used to scavenge mutable list entries, may encounter `WHITEHOLE`s when the non-moving GC is in use via two paths: 1. when an MVAR is being marked concurrently 2. when the object belongs to a chain of selectors being short-cutted. Fixes #26204. - - - - - 6bd8155c by Matthew Pickering at 2025-10-11T14:07:29-04:00 Add support for generating bytecode objects This commit adds the `-fwrite-byte-code` option which makes GHC emit a `.gbc` file which contains a serialised representation of bytecode. The bytecode can be loaded by the compiler to avoid having to reinterpret a module when using the bytecode interpreter (for example, in GHCi). There are also the new options: * -gbcdir=<DIR>: Specify the directory to place the gbc files * -gbcsuf=<suffix>: Specify the suffix for gbc files The option `-fbyte-code-and-object-code` now implies `-fwrite-byte-code`. These performance tests fail due to https://github.com/haskell/directory/issues/204 ------------------------- Metric Increase: MultiComponentModules MultiLayerModules MultiComponentModulesRecomp MultiLayerModulesRecomp MultiLayerModulesTH_Make MultiLayerModulesTH_OneShot T13701 ------------------------- The bytecode serialisation part was implemented by Cheng Shao Co-authored-by: Cheng Shao <terrorjack(a)type.dance> - - - - - dc8f9599 by Matthew Pickering at 2025-10-11T14:07:30-04:00 Revert "Add a perf test for #26425" This test has a large memory spike currently, which makes the test sensitive, since if you allocate a little more or less, the precise location where GC happens shifts and you observe a different part of the spike. Andreas told me to revert the patch for now, and he will add it back when he fixes the memory spike. This reverts commit 41bdb16fd083110a06507248f648c507a2feb4af. - - - - - e10dcd65 by Sven Tennie at 2025-10-12T10:24:56+00:00 T22859: Increase threadDelay for small machines The previously used thread delay led to failures on my RISC-V test setups. - - - - - d59ef6b6 by Hai / @BestYeen at 2025-10-14T21:51:14-04:00 Change Alex and Happy m4 scripts to display which version was found in the system, adapt small formatting details in Happy script to be more like the Alex script again. - - - - - c98abb6a by Hai / @BestYeen at 2025-10-14T21:52:08-04:00 Update occurrences of return to pure and add a sample for redefining :m to mean :main - - - - - 70ee825a by Cheng Shao at 2025-10-14T21:52:50-04:00 testsuite: fix T3586 for non-SSE3 platforms `T3586.hs` contains `-fvia-C -optc-msse3` which I think is a best-effort basis to harvest the C compiler's auto vectorization optimizations via the C backend back when the test was added. The `-fvia-C` part is now a deprecated no-op because GHC can't fall back to the C backend on a non-unregisterised build, and `-optc-msse3` might actually cause the test to fail on non x86/x64 platforms, e.g. recent builds of wasi-sdk would report `wasm32-wasi-clang: error: unsupported option '-msse3' for target 'wasm32-unknown-wasi'`. So this patch cleans up this historical cruft. `-fvia-C` is removed, and `-optc-msse3` is only passed when cpuid contains `pni` (which indicates support of SSE3). - - - - - 4be32153 by Teo Camarasu at 2025-10-15T08:06:09-04:00 Add submodules for template-haskell-lift and template-haskell-quasiquoter These two new boot libraries expose stable subsets of the template-haskell interface. This is an implemenation of the GHC proposal https://github.com/ghc-proposals/ghc-proposals/pull/696 Work towards #25262 - - - - - 0c00c9c3 by Ben Gamari at 2025-10-15T08:06:51-04:00 rts: Eliminate uses of implicit constant arrays Folding of `const`-sized variable-length arrays to a constant-length array is a gnu extension which clang complains about. Closes #26502. - - - - - bf902a1d by Fendor at 2025-10-15T16:00:59-04:00 Refactor distinct constructor tables map construction Adds `GHC.Types.Unique.FM.alterUFM_L`, `GHC.Types.Unique.DFM.alterUDFM_L` `GHC.Data.Word64Map.alterLookup` to support fusion of distinct constructor data insertion and lookup during the construction of the `DataCon` map in `GHC.Stg.Debug.numberDataCon`. Co-authored-by: Fendor <fendor(a)posteo.de> Co-authored-by: Finley McIlwaine <finleymcilwaine(a)gmail.com> - - - - - b3585ba1 by Fendor at 2025-10-15T16:00:59-04:00 Allow per constructor refinement of distinct-constructor-tables Introduce `-fno-distinct-constructor-tables`. A distinct constructor table configuration is built from the combination of flags given, in order. For example, to only generate distinct constructor tables for a few specific constructors and no others, just pass `-fdistinct-constructor-tables-only=C1,...,CN`. This flag can be supplied multiple times to extend the set of constructors to generate a distinct info table for. You can disable generation of distinct constructor tables for all configurations by passing `-fno-distinct-constructor-tables`. The various configurations of these flags is included in the `DynFlags` fingerprints, which should result in the expected recompilation logic. Adds a test that checks for distinct tables for various given or omitted constructors. Updates CountDepsAst and CountDepsParser tests to account for new dependencies. Fixes #23703 Co-authored-by: Fendor <fendor(a)posteo.de> Co-authored-by: Finley McIlwaine <finleymcilwaine(a)gmail.com> - - - - - e17dc695 by fendor at 2025-10-15T16:01:41-04:00 Fix typos in haddock documentation for stack annotation API - - - - - f85058d3 by Zubin Duggal at 2025-10-17T13:50:52+05:30 compiler: Attempt to systematize Unique tags by introducing an ADT for each different tag Fixes #26264 Metric Decrease: T9233 - - - - - c85c845d by sheaf at 2025-10-17T22:35:32-04:00 Don't prematurely final-zonk PatSyn declarations This commit makes GHC hold off on the final zonk for pattern synonym declarations, in 'GHC.Tc.TyCl.PatSyn.tc_patsyn_finish'. This accommodates the fact that pattern synonym declarations without a type signature can contain unfilled metavariables, e.g. if the RHS of the pattern synonym involves view-patterns whose type mentions promoted (level 0) metavariables. Just like we do for ordinary function bindings, we should allow these metavariables to be settled later, instead of eagerly performing a final zonk-to-type. Now, the final zonking-to-type for pattern synonyms is performed in GHC.Tc.Module.zonkTcGblEnv. Fixes #26465 - - - - - ba3e5bdd by Rodrigo Mesquita at 2025-10-18T16:57:18-04:00 Move code-gen aux symbols from ghc-internal to rts These symbols were all previously defined in ghc-internal and made the dependency structure awkward, where the rts may refer to some of these symbols and had to work around that circular dependency the way described in #26166. Moreover, the code generator will produce code that uses these symbols! Therefore, they should be available in the rts: PRINCIPLE: If the code generator may produce code which uses this symbol, then it should be defined in the rts rather than, say, ghc-internal. That said, the main motivation is towards fixing #26166. Towards #26166. Pre-requisite of !14892 - - - - - f31de2a9 by Ben Gamari at 2025-10-18T16:57:18-04:00 rts: Avoid static symbol references to ghc-internal This resolves #26166, a bug due to new constraints placed by Apple's linker on undefined references. One source of such references in the RTS is the many symbols referenced in ghc-internal. To mitigate #26166, we make these references dynamic, as described in Note [RTS/ghc-internal interface]. Fixes #26166 Co-authored-by: Rodrigo Mesquita <rodrigo.m.mesquita(a)gmail.com> Co-authored-by: Cheng Shao <terrorjack(a)type.dance> - - - - - 43fdfddc by Ben Gamari at 2025-10-18T16:57:18-04:00 compiler: Rename isMathFun -> isLibcFun This set includes more than just math functions. - - - - - 4ed5138f by Ben Gamari at 2025-10-18T16:57:18-04:00 compiler: Add libc allocator functions to libc_funs Prototypes for these are now visible from `Prim.h`, resulting in multiple-declaration warnings in the unregisterised job. - - - - - 9a0a076b by Ben Gamari at 2025-10-18T16:57:18-04:00 rts: Minimize header dependencies of Prim.h Otherwise we will end up with redundant and incompatible declarations resulting in warnings during the unregisterised build. - - - - - 26b8a414 by Diego Antonio Rosario Palomino at 2025-10-18T16:58:10-04:00 Cmm Parser: Fix incorrect example in comment The Parser.y file contains a comment with an incorrect example of textual Cmm (used in .cmm files). This commit updates the comment to ensure it reflects valid textual Cmm syntax. Fixes #26313 - - - - - d4a9d6d6 by ARATA Mizuki at 2025-10-19T18:43:47+09:00 Handle implications between x86 feature flags This includes: * Multiple -msse* options can be specified * -mavx implies -msse4.2 * -mavx2 implies -mavx * -mfma implies -mavx * -mavx512f implies -mavx2 and -mfma * -mavx512{cd,er,pf} imply -mavx512f Closes #24989 Co-authored-by: sheaf <sam.derbyshire(a)gmail.com> - - - - - c9b8465c by Cheng Shao at 2025-10-20T10:16:00-04:00 wasm: workaround WebKit bug in dyld This patch works around a WebKit bug and allows dyld to run on WebKit based platforms as well. See added note for detailed explanation. Co-authored-by: Codex <codex(a)openai.com> - - - - - 91b6be10 by Julian Ospald at 2025-10-20T18:21:03-04:00 Improve error handling in 'getPackageArchives' When the library dirs in the package conf files are not set up correctly, the JS linker will happily ignore such packages and not link against them, although they're part of the link plan. Fixes #26383 - - - - - 6c5269da by Sven Tennie at 2025-10-20T18:21:44-04:00 Align coding style Improve readability by using the same style for all constructor calls in this function. - - - - - 3d305889 by Sven Tennie at 2025-10-20T18:21:44-04:00 Reduce complexity by removing joins with mempty ldArgs, cArgs and cppArgs are all `mempty`. Thus concatenating them adds nothing but some complexity while reading the code. - - - - - 38d65187 by Matthew Pickering at 2025-10-21T13:12:20+01:00 Fix stack decoding when using profiled runtime There are three fixes in this commit. * We need to replicate the `InfoTable` and `InfoTableProf` approach for the other stack constants (see the new Stack.ConstantsProf file). * Then we need to appropiately import the profiled or non-profiled versions. * Finally, there was an incorrect addition in `stackFrameSize`. We need to cast after performing addition on words. Fixes #26507 - - - - - 17231bfb by fendor at 2025-10-21T13:12:20+01:00 Add regression test for #26507 - - - - - 4f5bf93b by Simon Peyton Jones at 2025-10-25T04:05:34-04:00 Postscript to fix for #26255 This MR has comments only - - - - - 6ef22fa0 by IC Rainbow at 2025-10-26T18:23:01-04:00 Add SIMD primops for bitwise logical operations This adds 128-bit wide and/or/xor instructions for X86 NCG, with both SSE and AVX encodings. ``` andFloatX4# :: FloatX4# -> FloatX4# -> FloatX4# -- andps / vandps andDoubleX2# :: DoubleX2# -> DoubleX2# -> DoubleX2# -- andpd / vandpd andInt8X16# :: Int8X16# -> Int8X16# -> Int8X16# -- pand / vpand ``` The new primops are available on ARM when using LLVM backend. Tests added: - simd015 (floats and doubles) - simd016 (integers) - simd017 (words) Fixes #26417 - - - - - fbdc623a by sheaf at 2025-10-26T18:23:52-04:00 Add hints for unsolved HasField constraints This commit adds hints and explanations for unsolved 'HasField' constraints. GHC will now provide additional explanations for an unsolved constraint of the form 'HasField fld_name rec_ty fld_ty'; the details are laid out in Note [Error messages for unsolved HasField constraints], but briefly: 1. Provide similar name suggestions (e.g. mis-spelled field name) and import suggestions (record field not in scope). These result in actionable 'GhcHints', which is helpful to provide code actions in HLS. 2. Explain why GHC did not solve the constraint, e.g.: - 'fld_name' is not a string literal (e.g. a type variable) - 'rec_ty' is a TyCon without any fields, e.g. 'Int' or 'Bool'. - 'fld_ty' contains existentials variables or foralls. - The record field is a pattern synonym field (GHC does not generate HasField instances for those). - 'HasField' is a custom 'TyCon', not actually the built-in 'HasField' typeclass from 'GHC.Records'. On the way, we slightly refactor the mechanisms for import suggestions in GHC.Rename.Unbound. This is to account for the fact that, for 'HasField', we don't care whether the field is imported qualified or unqualified. 'importSuggestions' was refactored, we now have 'sameQualImportSuggestions' and 'anyQualImportSuggestions'. Fixes #18776 #22382 #26480 - - - - - 99d5707f by sheaf at 2025-10-26T18:23:52-04:00 Rename PatSyn MatchContext to PatSynCtx to avoid punning - - - - - b56b9842 by fendor at 2025-10-27T08:41:36+01:00 Expose InfoProvId - - - - - 636d5645 by fendor at 2025-10-27T08:41:36+01:00 Expose more details from stack decoding - - - - - aa1efb61 by fendor at 2025-10-27T08:41:37+01:00 WIP: dont commit this, just for profiling - - - - - fcf56eb3 by Matthew Pickering at 2025-10-27T08:42:14+01:00 Verious stuff that needs to be revisited - - - - - 385 changed files: - .gitlab-ci.yml - .gitlab/generate-ci/gen_ci.hs - .gitlab/jobs.yaml - .gitmodules - compiler/GHC.hs - compiler/GHC/Builtin/PrimOps.hs - compiler/GHC/Builtin/Uniques.hs - compiler/GHC/Builtin/primops.txt.pp - compiler/GHC/ByteCode/Breakpoints.hs - + compiler/GHC/ByteCode/Serialize.hs - compiler/GHC/ByteCode/Types.hs - compiler/GHC/Cmm/CLabel.hs - compiler/GHC/Cmm/Info.hs - compiler/GHC/Cmm/Info/Build.hs - compiler/GHC/Cmm/MachOp.hs - compiler/GHC/Cmm/Parser.y - compiler/GHC/Cmm/Pipeline.hs - compiler/GHC/Cmm/UniqueRenamer.hs - compiler/GHC/CmmToAsm/AArch64/CodeGen.hs - compiler/GHC/CmmToAsm/Config.hs - compiler/GHC/CmmToAsm/Wasm/FromCmm.hs - compiler/GHC/CmmToAsm/X86/CodeGen.hs - compiler/GHC/CmmToAsm/X86/Instr.hs - compiler/GHC/CmmToAsm/X86/Ppr.hs - compiler/GHC/CmmToC.hs - compiler/GHC/CmmToLlvm/Base.hs - compiler/GHC/CmmToLlvm/CodeGen.hs - compiler/GHC/Core/ConLike.hs - compiler/GHC/Core/Make.hs - compiler/GHC/Core/Multiplicity.hs - compiler/GHC/Core/Opt/Monad.hs - compiler/GHC/Core/Opt/Pipeline.hs - compiler/GHC/Core/Opt/Simplify/Monad.hs - compiler/GHC/Core/PatSyn.hs - compiler/GHC/Core/Predicate.hs - compiler/GHC/Core/TyCo/Compare.hs - compiler/GHC/Core/TyCo/Ppr.hs - compiler/GHC/Core/Type.hs - compiler/GHC/CoreToStg/Prep.hs - compiler/GHC/Data/FlatBag.hs - compiler/GHC/Data/SmallArray.hs - compiler/GHC/Data/Word64Map/Internal.hs - compiler/GHC/Data/Word64Map/Lazy.hs - compiler/GHC/Driver/Backend.hs - compiler/GHC/Driver/Backpack.hs - + compiler/GHC/Driver/ByteCode.hs - compiler/GHC/Driver/CodeOutput.hs - compiler/GHC/Driver/Config/CmmToAsm.hs - compiler/GHC/Driver/Config/Finder.hs - compiler/GHC/Driver/Config/Stg/Debug.hs - compiler/GHC/Driver/Downsweep.hs - compiler/GHC/Driver/DynFlags.hs - compiler/GHC/Driver/Env/Types.hs - compiler/GHC/Driver/Errors.hs - compiler/GHC/Driver/Flags.hs - compiler/GHC/Driver/Main.hs - compiler/GHC/Driver/Make.hs - compiler/GHC/Driver/MakeFile.hs - compiler/GHC/Driver/Messager.hs - compiler/GHC/Driver/Monad.hs - compiler/GHC/Driver/Pipeline/Execute.hs - compiler/GHC/Driver/Session.hs - compiler/GHC/Hs/Decls.hs - compiler/GHC/Hs/Expr.hs - compiler/GHC/Hs/Type.hs - compiler/GHC/HsToCore/Breakpoints.hs - compiler/GHC/HsToCore/Foreign/C.hs - compiler/GHC/HsToCore/Foreign/JavaScript.hs - compiler/GHC/HsToCore/Foreign/Wasm.hs - compiler/GHC/HsToCore/Monad.hs - compiler/GHC/HsToCore/Pmc/Utils.hs - compiler/GHC/HsToCore/Usage.hs - compiler/GHC/HsToCore/Utils.hs - compiler/GHC/Iface/Binary.hs - compiler/GHC/Iface/Decl.hs - compiler/GHC/Iface/Ext/Ast.hs - compiler/GHC/Iface/Flags.hs - compiler/GHC/Iface/Load.hs - compiler/GHC/Iface/Make.hs - compiler/GHC/Iface/Recomp/Flags.hs - compiler/GHC/Iface/Rename.hs - compiler/GHC/Iface/Type.hs - compiler/GHC/JS/JStg/Monad.hs - compiler/GHC/Linker/Deps.hs - compiler/GHC/Linker/Dynamic.hs - compiler/GHC/Linker/Loader.hs - compiler/GHC/Linker/Static.hs - compiler/GHC/Linker/Types.hs - compiler/GHC/Parser/Header.hs - compiler/GHC/Platform.hs - compiler/GHC/Platform/Reg.hs - compiler/GHC/Rename/Bind.hs - compiler/GHC/Rename/Names.hs - compiler/GHC/Rename/Unbound.hs - compiler/GHC/Runtime/Eval.hs - compiler/GHC/Stg/Debug.hs - + compiler/GHC/Stg/Debug/Types.hs - compiler/GHC/Stg/EnforceEpt.hs - compiler/GHC/Stg/Pipeline.hs - compiler/GHC/StgToCmm/ExtCode.hs - compiler/GHC/StgToCmm/Monad.hs - compiler/GHC/StgToCmm/Prim.hs - compiler/GHC/StgToJS/CodeGen.hs - compiler/GHC/StgToJS/Ids.hs - compiler/GHC/StgToJS/Linker/Linker.hs - compiler/GHC/StgToJS/Prim.hs - compiler/GHC/Tc/Errors.hs - compiler/GHC/Tc/Errors/Ppr.hs - compiler/GHC/Tc/Errors/Types.hs - compiler/GHC/Tc/Gen/HsType.hs - compiler/GHC/Tc/Gen/Splice.hs - compiler/GHC/Tc/Instance/Class.hs - compiler/GHC/Tc/Module.hs - compiler/GHC/Tc/Solver.hs - compiler/GHC/Tc/Solver/Equality.hs - compiler/GHC/Tc/Solver/Monad.hs - compiler/GHC/Tc/Solver/Solve.hs - compiler/GHC/Tc/TyCl.hs - compiler/GHC/Tc/TyCl/PatSyn.hs - compiler/GHC/Tc/TyCl/Utils.hs - compiler/GHC/Tc/Types.hs - compiler/GHC/Tc/Types/Constraint.hs - compiler/GHC/Tc/Types/CtLoc.hs - compiler/GHC/Tc/Types/Origin.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/Utils/Unify.hs-boot - compiler/GHC/Tc/Validity.hs - compiler/GHC/Tc/Zonk/Type.hs - compiler/GHC/Types/Hint.hs - compiler/GHC/Types/Hint/Ppr.hs - compiler/GHC/Types/Name/Cache.hs - compiler/GHC/Types/SourceError.hs - compiler/GHC/Types/SptEntry.hs - compiler/GHC/Types/Tickish.hs - compiler/GHC/Types/TyThing/Ppr.hs - compiler/GHC/Types/Unique.hs - compiler/GHC/Types/Unique/DFM.hs - compiler/GHC/Types/Unique/DSM.hs - compiler/GHC/Types/Unique/FM.hs - compiler/GHC/Types/Unique/Supply.hs - compiler/GHC/Unit/Finder.hs - compiler/GHC/Unit/Finder/Types.hs - compiler/GHC/Unit/Module/Graph.hs - compiler/GHC/Unit/Module/Location.hs - compiler/GHC/Unit/Module/ModSummary.hs - compiler/GHC/Unit/Module/WholeCoreBindings.hs - compiler/GHC/Utils/Binary.hs - compiler/GHC/Utils/Error.hs - compiler/GHC/Utils/Outputable.hs - compiler/Language/Haskell/Syntax/Binds.hs - compiler/Language/Haskell/Syntax/Expr.hs - compiler/ghc.cabal.in - docs/users_guide/9.16.1-notes.rst - docs/users_guide/debug-info.rst - docs/users_guide/ghci.rst - docs/users_guide/phases.rst - docs/users_guide/separate_compilation.rst - docs/users_guide/using.rst - + ghc-debug - + ghc/GHC/EventLog/Sample.hs - ghc/GHCi/UI.hs - ghc/Main.hs - ghc/ghc-bin.cabal.in - hadrian/bindist/config.mk.in - hadrian/src/Packages.hs - hadrian/src/Rules/Gmp.hs - hadrian/src/Rules/Libffi.hs - hadrian/src/Settings/Builders/Cabal.hs - hadrian/src/Settings/Builders/Common.hs - hadrian/src/Settings/Builders/DeriveConstants.hs - hadrian/src/Settings/Builders/Hsc2Hs.hs - hadrian/src/Settings/Default.hs - hadrian/src/Settings/Packages.hs - + instructions.md - libraries/base/src/GHC/Base.hs - libraries/base/src/GHC/Exts.hs - libraries/ghc-experimental/CHANGELOG.md - libraries/ghc-experimental/src/GHC/Stack/Annotation/Experimental.hs - + libraries/ghc-internal/cbits/RtsIface.c - libraries/ghc-internal/cbits/Stack_c.c - libraries/ghc-internal/ghc-internal.cabal.in - + libraries/ghc-internal/include/RtsIfaceSymbols.h - libraries/ghc-internal/src/GHC/Internal/InfoProv/Types.hsc - + libraries/ghc-internal/src/GHC/Internal/Stack/ConstantsProf.hsc - libraries/ghc-internal/src/GHC/Internal/Stack/Decode.hs - libraries/ghc-internal/src/GHC/Internal/TH/Lift.hs - libraries/ghc-internal/src/GHC/Internal/TH/Quote.hs - + libraries/ghc-internal/tests/backtraces/T26507.hs - + libraries/ghc-internal/tests/backtraces/T26507.stderr - libraries/ghc-internal/tests/backtraces/all.T - libraries/ghc-internal/tests/stack-annotation/all.T - libraries/ghc-prim/changelog.md - libraries/ghci/GHCi/Message.hs - + libraries/template-haskell-lift - + libraries/template-haskell-quasiquoter - m4/fptools_alex.m4 - m4/fptools_happy.m4 - rts/BuiltinClosures.c - rts/CloneStack.h - rts/Compact.cmm - rts/ContinuationOps.cmm - rts/Exception.cmm - rts/Prelude.h - rts/PrimOps.cmm - rts/Printer.c - rts/RtsAPI.c - rts/RtsStartup.c - rts/RtsSymbols.c - + rts/RtsToHsIface.c - rts/StgStdThunks.cmm - rts/configure.ac - − rts/external-symbols.list.in - rts/include/Rts.h - rts/include/RtsAPI.h - rts/include/Stg.h - + rts/include/rts/RtsToHsIface.h - rts/include/rts/Types.h - rts/include/rts/storage/Block.h - rts/include/stg/Prim.h - rts/posix/OSMem.c - rts/posix/Signals.c - libraries/ghc-internal/cbits/atomic.c → rts/prim/atomic.c - libraries/ghc-internal/cbits/bitrev.c → rts/prim/bitrev.c - libraries/ghc-internal/cbits/bswap.c → rts/prim/bswap.c - libraries/ghc-internal/cbits/clz.c → rts/prim/clz.c - libraries/ghc-internal/cbits/ctz.c → rts/prim/ctz.c - libraries/ghc-internal/cbits/int64x2minmax.c → rts/prim/int64x2minmax.c - libraries/ghc-internal/cbits/longlong.c → rts/prim/longlong.c - libraries/ghc-internal/cbits/mulIntMayOflo.c → rts/prim/mulIntMayOflo.c - libraries/ghc-internal/cbits/pdep.c → rts/prim/pdep.c - libraries/ghc-internal/cbits/pext.c → rts/prim/pext.c - libraries/ghc-internal/cbits/popcnt.c → rts/prim/popcnt.c - libraries/ghc-internal/cbits/vectorQuotRem.c → rts/prim/vectorQuotRem.c - libraries/ghc-internal/cbits/word2float.c → rts/prim/word2float.c - − rts/rts.buildinfo.in - rts/rts.cabal - rts/sm/NonMoving.c - rts/sm/NonMovingMark.c - rts/sm/Scav.c - rts/wasm/JSFFI.c - rts/wasm/scheduler.cmm - rts/win32/libHSghc-internal.def - testsuite/driver/cpu_features.py - testsuite/tests/bytecode/T24634/T24634a.stdout - testsuite/tests/bytecode/T24634/T24634b.stdout - testsuite/tests/codeGen/should_gen_asm/all.T - + testsuite/tests/codeGen/should_gen_asm/mavx-should-enable-popcnt.asm - + testsuite/tests/codeGen/should_gen_asm/mavx-should-enable-popcnt.hs - + testsuite/tests/codeGen/should_gen_asm/msse-option-order.asm - + testsuite/tests/codeGen/should_gen_asm/msse-option-order.hs - testsuite/tests/count-deps/CountDepsAst.stdout - testsuite/tests/count-deps/CountDepsParser.stdout - testsuite/tests/cpranal/should_compile/T18174.stderr - testsuite/tests/driver/T11429c.stderr - testsuite/tests/driver/T21682.stderr - + testsuite/tests/driver/bytecode-object/A.hs - + testsuite/tests/driver/bytecode-object/BytecodeForeign.c - + testsuite/tests/driver/bytecode-object/BytecodeForeign.hs - + testsuite/tests/driver/bytecode-object/BytecodeMain.hs - + testsuite/tests/driver/bytecode-object/BytecodeTest.hs - + testsuite/tests/driver/bytecode-object/Makefile - + testsuite/tests/driver/bytecode-object/all.T - + testsuite/tests/driver/bytecode-object/bytecode_object12.stderr - + testsuite/tests/driver/bytecode-object/bytecode_object13.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object14.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object15.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object16.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object17.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object18.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object19.script - + testsuite/tests/driver/bytecode-object/bytecode_object19.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object25.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object4.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object5.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object6.stdout - testsuite/tests/driver/fat-iface/T22405/T22405.stdout - testsuite/tests/driver/fat-iface/T22405/T22405b.stdout - testsuite/tests/driver/fat-iface/fat011.stderr - testsuite/tests/ghc-api/T10942.hs - + testsuite/tests/ghc-api/T26264.hs - + testsuite/tests/ghc-api/T26264.stdout - testsuite/tests/ghc-api/all.T - testsuite/tests/ghc-api/annotations-literals/literals.hs - testsuite/tests/indexed-types/should_fail/T14887.stderr - testsuite/tests/interface-stability/ghc-experimental-exports.stdout - testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32 - testsuite/tests/interface-stability/ghc-prim-exports.stdout - testsuite/tests/interface-stability/ghc-prim-exports.stdout-mingw32 - testsuite/tests/linear/should_fail/T19361.stderr - testsuite/tests/llvm/should_run/all.T - testsuite/tests/overloadedrecflds/should_compile/BootFldReexport.stderr - testsuite/tests/overloadedrecflds/should_fail/T16745.stderr - testsuite/tests/overloadedrecflds/should_fail/T18999_NoDisambiguateRecordFields.stderr - + testsuite/tests/overloadedrecflds/should_fail/T26480.hs - + testsuite/tests/overloadedrecflds/should_fail/T26480.stderr - + testsuite/tests/overloadedrecflds/should_fail/T26480_aux1.hs - + testsuite/tests/overloadedrecflds/should_fail/T26480_aux2.hs - + testsuite/tests/overloadedrecflds/should_fail/T26480b.hs - + testsuite/tests/overloadedrecflds/should_fail/T26480b.stderr - 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testsuite/tests/perf/should_run/T3586.hs - testsuite/tests/perf/should_run/UniqLoop.hs - testsuite/tests/perf/should_run/all.T - + testsuite/tests/pmcheck/should_compile/T26400.hs - + testsuite/tests/pmcheck/should_compile/T26400.stderr - + testsuite/tests/pmcheck/should_compile/T26400b.hs - testsuite/tests/pmcheck/should_compile/all.T - testsuite/tests/regalloc/regalloc_unit_tests.hs - testsuite/tests/rename/should_fail/T19843h.stderr - testsuite/tests/roles/should_compile/Roles13.stderr - testsuite/tests/rts/T22859.hs - + testsuite/tests/rts/ipe/distinct-tables/Main.hs - + testsuite/tests/rts/ipe/distinct-tables/Makefile - + testsuite/tests/rts/ipe/distinct-tables/X.hs - + testsuite/tests/rts/ipe/distinct-tables/all.T - + testsuite/tests/rts/ipe/distinct-tables/distinct_tables01.stdout - + testsuite/tests/rts/ipe/distinct-tables/distinct_tables02.stdout - + testsuite/tests/rts/ipe/distinct-tables/distinct_tables03.stdout - + testsuite/tests/rts/ipe/distinct-tables/distinct_tables04.stdout - 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testsuite/tests/typecheck/should_fail/T19627.stderr - testsuite/tests/typecheck/should_fail/T20241b.stderr - testsuite/tests/typecheck/should_fail/T21530a.stderr - testsuite/tests/typecheck/should_fail/UnliftedNewtypesFamilyKindFail2.stderr - testsuite/tests/typecheck/should_fail/VisFlag1.stderr - utils/check-exact/Parsers.hs - utils/check-exact/Preprocess.hs - utils/deriveConstants/Main.hs - utils/ghc-toolchain/src/GHC/Toolchain/Tools/MergeObjs.hs - utils/jsffi/dyld.mjs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/f3e2839af9f12a5bb85b8fff299bec… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/f3e2839af9f12a5bb85b8fff299bec… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/fendor/ghc-sample-profiler] 2 commits: WIP: dont commit this, just for profiling
by Hannes Siebenhandl (＠fendor) 27 Oct '25

27 Oct '25

Hannes Siebenhandl pushed to branch wip/fendor/ghc-sample-profiler at Glasgow Haskell Compiler / GHC Commits: c5d76d58 by fendor at 2025-10-17T11:52:06+02:00 WIP: dont commit this, just for profiling - - - - - f3e2839a by Matthew Pickering at 2025-10-27T08:41:03+01:00 Verious stuff that needs to be revisited - - - - - 9 changed files: - .gitmodules - + ghc-debug - + ghc/GHC/EventLog/Sample.hs - ghc/Main.hs - ghc/ghc-bin.cabal.in - hadrian/src/Packages.hs - hadrian/src/Settings/Default.hs - hadrian/src/Settings/Packages.hs - + instructions.md Changes: ===================================== .gitmodules ===================================== @@ -118,3 +118,6 @@ [submodule "libraries/file-io"] path = libraries/file-io url = https://gitlab.haskell.org/ghc/packages/file-io.git +[submodule "ghc-debug"] + path = ghc-debug + url = git@gitlab.haskell.org:ghc/ghc-debug.git ===================================== ghc-debug ===================================== @@ -0,0 +1 @@ +Subproject commit 1b0f36fab86e9baa9734c88dcc1dbe17d10d8c93 ===================================== ghc/GHC/EventLog/Sample.hs ===================================== @@ -0,0 +1,376 @@ +{-# LANGUAGE NamedFieldPuns #-} +{-# LANGUAGE OverloadedStrings #-} +{-# LANGUAGE LambdaCase #-} +{-# LANGUAGE MagicHash #-} +{-# LANGUAGE UnboxedTuples #-} +{-# LANGUAGE CPP #-} + +module GHC.EventLog.Sample where +import Prelude + +import Control.Concurrent +import Control.Exception +import Control.Monad +import qualified Data.ByteString.Lazy as LBS +import qualified Data.List as List +import GHC.Conc +import GHC.Conc.Sync + +import Control.Concurrent +import Control.Monad (replicateM, when) +import Data.Binary +import Data.Binary.Get +import Data.Binary.Put +import qualified Data.ByteString as B +import qualified Data.ByteString.Unsafe as BU +import qualified System.IO.Unsafe as Unsafe +import qualified Data.ByteString.Lazy as LBS +import Data.Text (Text) +import qualified Data.Text as Text +import Data.Typeable (cast) +import Data.Maybe +import qualified Data.List.NonEmpty as NonEmpty +import Unsafe.Coerce +import GHC.Exts (Ptr(..), Int(..), traceBinaryEvent#) +import GHC.IO (IO(..)) +import GHC.Stack.Annotation.Experimental + +import GHC.Stack.CloneStack (StackSnapshot(..), cloneThreadStack) +import GHC.Internal.Conc.Sync + +import GHC.Internal.Conc.Sync +import GHC.Internal.InfoProv.Types (InfoProv(..), lookupIpProvId) +import GHC.Internal.Heap.Closures +import qualified GHC.Internal.Stack.Decode as Decode +import GHC.Internal.Stack.Types + +import Control.Monad (replicateM) +import Data.Binary +import Data.Binary.Put +import Data.Binary.Get + +import GHC.Internal.RTS.Flags.Test + +import Debug.Trace +import GHC.Profiling.Eras + +traceBinaryEventIO :: B.ByteString -> IO () +traceBinaryEventIO bytes = traceBinaryEventIO' bytes + +traceBinaryEventIO' :: B.ByteString -> IO () +traceBinaryEventIO' bytes = + BU.unsafeUseAsCStringLen bytes $ \(Ptr p, I# n) -> IO $ \s -> + case traceBinaryEvent# p n s of + s' -> (# s', () #) + +data SamplerThread = MkSamplerThread + { samplerThreadId :: ThreadId + } deriving (Show, Eq, Ord) + +withSampleProfiler :: Int -> IO a -> IO a +withSampleProfiler delay act = do + enabled <- getUserEventTracingEnabled + if enabled + then bracket setupSamplers tearDownSamplers (const act) + else act + where + setupSamplers = do + samplerThreadConfigMVar <- newEmptyMVar + sid <- forkIO $ do + config <- takeMVar samplerThreadConfigMVar + sampleThreadId <- myThreadId + labelThread sampleThreadId "Sample Profiler Thread" + forever $ do + tids <- listThreads + userThreads <- filterM (isThreadOfInterest config) tids + forM_ userThreads $ \tid -> + sampleToEventlog tid + -- TODO: this is wrong, we don't sample every delay time as sampling takes time as well + threadDelay delay + + let sampleThreadConf = MkSamplerThread + { samplerThreadId = sid + } + putMVar samplerThreadConfigMVar sampleThreadConf + pure sampleThreadConf + + tearDownSamplers MkSamplerThread{samplerThreadId} = + killThread samplerThreadId + + isThreadOfInterest :: SamplerThread -> ThreadId -> IO Bool + isThreadOfInterest config tid = do + lbl <- threadLabel tid + pure $ not $ or + [ isProfilerThread config tid lbl + , isBuiltinThread tid lbl + ] + +isProfilerThread :: SamplerThread -> ThreadId -> Maybe String -> Bool +isProfilerThread MkSamplerThread {samplerThreadId} tid lbl = tid == samplerThreadId + +isBuiltinThread :: ThreadId -> Maybe String -> Bool +isBuiltinThread _ Nothing = False +isBuiltinThread _tid (Just lbl) = + lbl `elem` ["TimerManager"] || "IOManager on cap" `List.isPrefixOf` lbl + + +sampleToEventlog :: ThreadId -> IO () +sampleToEventlog tid = do + sampleThread tid >>= \ case + Nothing -> pure () + Just threadSample -> do + msg <- serializeThreadSample threadSample + traceBinaryEventIO $ LBS.toStrict msg + + +---- + + +newtype CapabilityId = + CapabilityId + { getCapabilityId :: Word64 + } + deriving (Show, Eq, Ord) + +data ThreadSample = + ThreadSample + { threadSampleId :: ThreadId + , threadSampleCapability :: CapabilityId + , threadSampleStackSnapshot :: StackSnapshot + } + +sampleThread :: ThreadId -> IO (Maybe ThreadSample) +sampleThread tid = do + (cap, blocked) <- threadCapability tid + if blocked + then pure Nothing + else do + stack <- cloneThreadStack tid + pure $ Just $ ThreadSample + { threadSampleId = tid + , threadSampleCapability = CapabilityId $ intToWord64 cap + , threadSampleStackSnapshot = stack + } + +serializeThreadSample :: ThreadSample -> IO LBS.ByteString +serializeThreadSample sample = do + callStackMessage <- threadSampleToCallStackMessage sample + pure $ runPut $ put callStackMessage + +deserializeCallStackMessage :: LBS.ByteString -> Either String CallStackMessage +deserializeCallStackMessage = Right . runGet get + +-- Message format: +-- +-- MESSAGE +-- := "CA" "11" <STACK> +-- STACK +-- := <capability: Word32> <threadId: Word32> <length: Word32> <ENTRY>+ +-- ENTRY +-- := "01" <ipe: Word64> +-- | "02" <string: STRING> +-- | "03" <row: Word32> <col: Word32> <function: CStringLen> <filename: CStringLen> +-- CStringLen +-- := <length: Word8> <Char>+ + +data CallStackMessage = + MkCallStackMessage + { callThreadId :: Word64 + , callCapabilityId :: CapabilityId + , callStack :: [StackItem] + } + deriving (Eq, Ord, Show) + +data StackItem + = IpeId !Word64 + | UserMessage !String + | SourceLocation !SourceLocation + deriving (Eq, Ord, Show) + +data SourceLocation = + MkSourceLocation + { line :: !Word32 + , column :: !Word32 + , functionName :: !Text + , fileName :: !Text + } + deriving (Eq, Ord, Show) + +instance Binary CallStackMessage where + put msg = do + putByteString "CA" + putByteString "11" + putWord32 $ word64ToWord32 $ getCapabilityId $ callCapabilityId msg + putWord32 $ word64ToWord32 $ callThreadId msg + putWord8 $ intToWord8 $ min cutOffLength $ length $ callStack msg -- TODO: limit number of stack entries to 2^32 + mapM_ put $ take cutOffLength $ callStack msg + + get = do + _ <- getByteString 2 -- CA + _ <- getByteString 2 -- 11 + capId <- getWord32 + tid <- getWord32 + len <- getWord8 + items <- replicateM (word8ToInt len) get + pure MkCallStackMessage + { callThreadId = word32ToWord64 tid + , callCapabilityId = CapabilityId $ word32ToWord64 capId + , callStack = items + } + +instance Binary SourceLocation where + put loc = do + putWord32 $ line loc + putWord32 $ column loc + putStringLen $ Text.unpack $ functionName loc + putStringLen $ Text.unpack $ fileName loc + + get = do + MkSourceLocation + <$> getWord32 + <*> getWord32 + <*> (Text.pack <$> getStringLen) + <*> (Text.pack <$> getStringLen) + +instance Binary StackItem where + put = \ case + IpeId ipeId -> do + putWord8 1 + putWord64 ipeId + UserMessage msg -> do + putWord8 2 + putStringLen msg + SourceLocation loc -> do + putWord8 3 + put loc + + get = do + getWord8 >>= \ case + 1 -> IpeId <$> getWord64 + 2 -> UserMessage <$> getStringLen + 3 -> SourceLocation <$> get + n -> fail $ "StackItem: Unexpected tag byte encounter: " <> show n + +decodeStackWithIpProvId :: StackSnapshot -> IO [(StackFrame, Maybe Word64)] +decodeStackWithIpProvId snapshot = do + concat . snd <$> Decode.decodeStackWithFrameUnpack unpackStackFrameWithIpProvId snapshot + +unpackStackFrameWithIpProvId :: Decode.StackFrameLocation -> IO (StackFrame, Maybe Word64) +unpackStackFrameWithIpProvId stackFrameLoc = do + Decode.unpackStackFrameTo stackFrameLoc + (\ info infoKey nextChunk@(StackSnapshot stack#) -> do + framesWithIpe <- decodeStackWithIpProvId nextChunk + mIpeId <- lookupIpProvId infoKey + pure + ( UnderflowFrame + { info_tbl = info, + nextChunk = + GenStgStackClosure + { ssc_info = info, + ssc_stack_size = Decode.getStackFields stack#, + ssc_stack = map fst framesWithIpe + } + } + , mIpeId + ) + + ) + (\ frame infoKey -> do + mIpeId <- lookupIpProvId infoKey + pure (frame, mIpeId) + ) + +threadSampleToCallStackMessage :: ThreadSample -> IO CallStackMessage +threadSampleToCallStackMessage sample = do + frames <- decodeStackWithIpProvId $ threadSampleStackSnapshot sample + let stackMessages = fmap List.head . List.group $ mapMaybe (uncurry stackFrameToStackItem) frames + pure MkCallStackMessage + { callThreadId = fromThreadId $ threadSampleId sample + , callCapabilityId = threadSampleCapability sample + , callStack = stackMessages + } + +stackFrameToStackItem :: StackFrame -> Maybe Word64 -> Maybe StackItem +stackFrameToStackItem frame mIpe = + case frame of + AnnFrame { annotation = Box someStackAnno } -> + case unsafeCoerce someStackAnno of + SomeStackAnnotation ann -> + case cast ann of + Just (CallStackAnnotation cs) -> + case getCallStack cs of + [] -> Nothing + ((name, sourceLoc):_) -> + Just $ SourceLocation $ MkSourceLocation + { line = intToWord32 $ srcLocStartLine sourceLoc + , column = intToWord32 $ srcLocStartCol sourceLoc + , functionName = Text.pack $ name + , fileName = Text.pack $ srcLocFile sourceLoc + } + + Nothing -> case cast ann of + Just (StringAnnotation msg) -> + Just $ UserMessage msg + Nothing -> + Nothing + _ -> + IpeId <$> mIpe + +-------- + +cutOffLength :: Int +cutOffLength = 255 + +putStringLenWithTag :: Word8 -> String -> Put +putStringLenWithTag tag msg = + putWord8 tag <> putStringLen msg + +putStringLen :: String -> Put +putStringLen msg = + putWord8 len <> putStringUtf8 msg + where + shortName = take cutOffLength msg + -- this is safe as we made sure that cutOffLength fits in a Word8 + len = intToWord8 $ length shortName + +getStringLen :: Get String +getStringLen = do + len <- getWord8 + replicateM (word8ToInt len) get + +putWord64 :: Word64 -> Put +putWord64 = putWord64be + +putWord32 :: Word32 -> Put +putWord32 = putWord32be + +getWord64 :: Get Word64 +getWord64 = getWord64be + +getWord32 :: Get Word32 +getWord32 = getWord32be + +word64ToWord32 :: Word64 -> Word32 +word64ToWord32 = fromIntegral + +word32ToWord64 :: Word32 -> Word64 +word32ToWord64 = fromIntegral + +word32ToInt :: Word32 -> Int +word32ToInt = fromIntegral + +word64ToInt :: Word64 -> Int +word64ToInt = fromIntegral + +intToWord64 :: Int -> Word64 +intToWord64 = fromIntegral + +intToWord32 :: Int -> Word32 +intToWord32 = fromIntegral + +intToWord8 :: Int -> Word8 +intToWord8 = fromIntegral + +word8ToInt :: Word8 -> Int +word8ToInt = fromIntegral + ===================================== ghc/Main.hs ===================================== @@ -33,6 +33,7 @@ import GHC.Driver.Backpack ( doBackpack ) import GHC.Driver.Plugins import GHC.Driver.Config.Logger (initLogFlags) import GHC.Driver.Config.Diagnostic +import GHC.Driver.Monad import GHC.Platform import GHC.Platform.Host @@ -92,6 +93,14 @@ import Data.List ( isPrefixOf, partition, intercalate ) import Prelude import qualified Data.List.NonEmpty as NE +#if defined(GHC_DEBUG) +import GHC.Debug.Stub +#endif + +#if defined(SAMPLE_TRACER) +import GHC.EventLog.Sample +#endif + ----------------------------------------------------------------------------- -- ToDo: @@ -104,8 +113,24 @@ import qualified Data.List.NonEmpty as NE ----------------------------------------------------------------------------- -- GHC's command-line interface +withGhcSampleProfiler :: IO () -> IO () +#if defined(SAMPLE_TRACER) +withGhcSampleProfiler = + withSampleProfiler 10000 +#else +withGhcSampleProfiler = + id +#endif + +debugWrapper :: IO a -> IO a +#if defined(GHC_DEBUG) +debugWrapper = withGhcDebug +#else +debugWrapper = id +#endif + main :: IO () -main = do +main = withGhcSampleProfiler $ do hSetBuffering stdout LineBuffering hSetBuffering stderr LineBuffering @@ -152,8 +177,10 @@ main = do ShowGhcUsage -> showGhcUsage dflags ShowGhciUsage -> showGhciUsage dflags PrintWithDynFlags f -> putStrLn (f dflags) - Right postLoadMode -> - main' postLoadMode units dflags argv3 flagWarnings + Right postLoadMode -> do + reifyGhc $ \session -> debugWrapper $ + reflectGhc (main' postLoadMode units dflags argv3 flagWarnings) session + main' :: PostLoadMode -> [String] -> DynFlags -> [Located String] -> [Warn] -> Ghc () ===================================== ghc/ghc-bin.cabal.in ===================================== @@ -22,11 +22,21 @@ Flag internal-interpreter Default: False Manual: True +Flag ghc-debug + Description: Build with support for ghc-debug. + Default: False + Manual: True + Flag threaded Description: Link the ghc executable against the threaded RTS Default: True Manual: True +Flag sampleTracer + Description: Link the ghc executable against the threaded RTS + Default: False + Manual: True + Executable ghc Default-Language: GHC2021 @@ -42,9 +52,20 @@ Executable ghc filepath >= 1.5 && < 1.6, containers >= 0.5 && < 0.9, transformers >= 0.5 && < 0.7, + ghc-internal, ghc-experimental, binary, + text, ghc-boot == @ProjectVersionMunged@, ghc == @ProjectVersionMunged@ + if flag(sampleTracer) + CPP-OPTIONS: -DSAMPLE_TRACER + other-modules: + GHC.EventLog.Sample + + if flag(ghc-debug) + build-depends: ghc-debug-stub + CPP-OPTIONS: -DGHC_DEBUG + if os(windows) Build-Depends: Win32 >= 2.3 && < 2.15 else ===================================== hadrian/src/Packages.hs ===================================== @@ -12,7 +12,7 @@ module Packages ( runGhc, semaphoreCompat, stm, templateHaskell, terminfo, text, time, timeout, transformers, unlit, unix, win32, xhtml, lintersCommon, lintNotes, lintCodes, lintCommitMsg, lintSubmoduleRefs, lintWhitespace, - ghcPackages, isGhcPackage, + ghcPackages, isGhcPackage, ghc_debug_convention, ghc_debug_stub, -- * Package information crossPrefix, programName, nonHsMainPackage, programPath, timeoutPath, @@ -43,7 +43,9 @@ ghcPackages = , terminfo, text, time, transformers, unlit, unix, win32, xhtml, fileio , timeout , lintersCommon - , lintNotes, lintCodes, lintCommitMsg, lintSubmoduleRefs, lintWhitespace ] + , lintNotes, lintCodes, lintCommitMsg, lintSubmoduleRefs, lintWhitespace + , ghc_debug_convention + , ghc_debug_stub ] -- TODO: Optimise by switching to sets of packages. isGhcPackage :: Package -> Bool @@ -133,6 +135,8 @@ unlit = util "unlit" unix = lib "unix" win32 = lib "Win32" xhtml = lib "xhtml" +ghc_debug_convention = lib "ghc-debug-convention" `setPath` "ghc-debug/convention" +ghc_debug_stub = lib "ghc-debug-stub" `setPath` "ghc-debug/stub" lintersCommon = lib "linters-common" `setPath` "linters/linters-common" lintNotes = linter "lint-notes" ===================================== hadrian/src/Settings/Default.hs ===================================== @@ -174,6 +174,8 @@ stage1Packages = do , unlit , xhtml , if winTarget then win32 else unix + , ghc_debug_convention + , ghc_debug_stub ] , when (not cross) [ hpcBin ===================================== hadrian/src/Settings/Packages.hs ===================================== @@ -116,6 +116,7 @@ packageArgs = do , builder (Cabal Flags) ? mconcat [ (expr (ghcWithInterpreter stage)) `cabalFlag` "internal-interpreter" + , notStage0 `cabalFlag` "ghc-debug" , ifM stage0 -- We build a threaded stage 1 if the bootstrapping compiler -- supports it. @@ -124,6 +125,7 @@ packageArgs = do -- We build a threaded stage N, N>1 if the configuration calls -- for it. (compilerStageOption ghcThreaded `cabalFlag` "threaded") + , notStage0 `cabalFlag` "sampleTracer" ] ] ===================================== instructions.md ===================================== @@ -0,0 +1,45 @@ +# Building GHC + +* Add the following to _build/hadrian.settings + +``` +stage1.*.ghc.hs.opts += -finfo-table-map -fdistinct-constructor-tables +``` + +* Build GHC as normal + +``` +./hadrian/build -j8 +``` + +* The result is a ghc-debug enabled compiler + +# Building a debugger + +* Use the compiler you just built to build ghc-debug + +``` +cd ghc-debug +cabal update +cabal new-build debugger -w ../_build/stage1/bin/ghc +``` + +# Running the debugger + +Modify `test/Test.hs` to implement the debugging thing you want to do. Perhaps +start with `p30`, which is a program to generate a profile. + + +* Start the process you want to debug +``` +GHC_DEBUG_SOCKET=/tmp/ghc-debug build-cabal +``` + +* Start the debugger +``` +cabal new-run debugger -w ... +``` + +* Open a ticket about the memory issue you find. + + View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/67ea2dcc1582dc863c8c8e3a6af965… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/67ea2dcc1582dc863c8c8e3a6af965… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/ani/kill-popErrCtxt] 57 commits: Add a perf test for #26425
by Apoorv Ingle (＠ani) 26 Oct '25

26 Oct '25

Apoorv Ingle pushed to branch wip/ani/kill-popErrCtxt at Glasgow Haskell Compiler / GHC Commits: 41bdb16f by Andreas Klebinger at 2025-10-06T18:04:34-04:00 Add a perf test for #26425 - - - - - 1da0c700 by Andreas Klebinger at 2025-10-06T18:05:14-04:00 Testsuite: Silence warnings about Wx-partial in concprog001 - - - - - 7471eb6a by sheaf at 2025-10-07T21:39:43-04:00 Improve how we detect user type errors in types This commit cleans up all the code responsible for detecting whether a type contains "TypeError msg" applications nested inside it. All the logic is now in 'userTypeError_maybe', which is always deep. Whether it looks inside type family applications is determined by the passed-in boolean flag: - When deciding whether a constraint is definitely insoluble, don't look inside type family applications, as they may still reduce -- in which case the TypeError could disappear. - When reporting unsolved constraints, look inside type family applications: they had the chance to reduce but didn't, and the custom type error might contain valuable information. All the details are explained in Note [Custom type errors in constraints] in GHC.Tc.Types.Constraint. Another benefit of this change is that it allows us to get rid of the deeply dodgy 'getUserTypeErrorMsg' function. This commit also improves the detection of custom type errors, for example in equality constraints: TypeError blah ~# rhs It used to be the case that we didn't detect the TypeError on the LHS, because we never considered that equality constraints could be insoluble due to the presence of custom type errors. Addressing this oversight improves detection of redundant pattern match warnings, fixing #26400. - - - - - 29955267 by Rodrigo Mesquita at 2025-10-07T21:40:25-04:00 cleanup: Drop obsolete settings from config.mk.in These values used to be spliced into the bindist's `config.mk` s.t. when `make` was run, the values were read and written into the bindist installation `settings` file. However, we now carry these values to the bindist directly in the default.target toolchain file, and `make` writes almost nothing to `settings` now (see #26227) The entries deleted in this MR were already unused. Fixes #26478 - - - - - f7adfed2 by ARATA Mizuki at 2025-10-08T08:37:24-04:00 T22033 is only relevant if the word size is 64-bit Fixes #25497 - - - - - ff1650c9 by Ben Gamari at 2025-10-08T08:38:07-04:00 rts/posix: Enforce iteration limit on heap reservation logic Previously we could loop indefinitely when attempting to get an address space reservation for our heap. Limit the logic to 8 iterations to ensure we instead issue a reasonable error message. Addresses #26151. - - - - - 01844557 by Ben Gamari at 2025-10-08T08:38:07-04:00 rts/posix: Hold on to low reservations when reserving heap Previously when the OS gave us an address space reservation in low memory we would immediately release it and try again. However, on some platforms this meant that we would get the same allocation again in the next iteration (since mmap's `hint` argument is just that, a hint). Instead we now hold on to low reservations until we have found a suitable heap reservation. Fixes #26151. - - - - - b2c8d052 by Sven Tennie at 2025-10-08T08:38:47-04:00 Build terminfo only in upper stages in cross-builds (#26288) Currently, there's no way to provide library paths for [n]curses for both - build and target - in cross-builds. As stage0 is only used to build upper stages, it should be fine to build terminfo only for them. This re-enables building cross-compilers with terminfo. - - - - - c58f9a61 by Julian Ospald at 2025-10-08T08:39:36-04:00 ghc-toolchain: Drop `ld.gold` from merge object command It's deprecated. Also see #25716 - - - - - 2b8baada by sheaf at 2025-10-08T18:23:37-04:00 Improvements to 'mayLookIdentical' This commit makes significant improvements to the machinery that decides when we should pretty-print the "invisible bits" of a type, such as: - kind applications, e.g. '@k' in 'Proxy @k ty' - RuntimeReps, e.g. 'TYPE r' - multiplicities and linear arrows 'a %1 -> b' To do this, this commit refactors 'mayLookIdentical' to return **which** of the invisible bits don't match up, e.g. in (a %1 -> b) ~ (a %Many -> b) we find that the invisible bit that doesn't match up is a multiplicity, so we should set 'sdocLinearTypes = True' when pretty-printing, and with e.g. Proxy @k1 ~ Proxy @k2 we find that the invisible bit that doesn't match up is an invisible TyCon argument, so we set 'sdocPrintExplicitKinds = True'. We leverage these changes to remove the ad-hoc treatment of linearity of data constructors with 'dataConDisplayType' and 'dataConNonLinearType'. This is now handled by the machinery of 'pprWithInvisibleBits'. Fixes #26335 #26340 - - - - - 129ce32d by sheaf at 2025-10-08T18:23:37-04:00 Store SDoc context in SourceError This commits modifies the SourceError datatype which is used for throwing and then reporting exceptions by storing all the info we need to be able to print the SDoc, including whether we should print with explicit kinds, explicit runtime-reps, etc. This is done using the new datatype: data SourceErrorContext = SEC !DiagOpts !(DiagnosticOpts GhcMessage) Now, when we come to report an error (by handling the exception), we have access to the full context we need. Fixes #26387 - - - - - f9790ca8 by Ben Gamari at 2025-10-08T18:24:19-04:00 gitlab-ci: Make RELEASE_JOB an input Rather than an undocumented variable. - - - - - 14281a22 by Ben Gamari at 2025-10-11T14:06:47-04:00 rts/nonmoving: Fix comment spelling - - - - - bedd38b0 by Ben Gamari at 2025-10-11T14:06:47-04:00 rts/nonmoving: Use atomic operations to update bd->flags - - - - - 215d6841 by Ben Gamari at 2025-10-11T14:06:47-04:00 nonmoving: Use get_itbl instead of explicit loads This is cleaner and also fixes unnecessary (and unsound) use of `volatile`. - - - - - 2c94aa3a by Ben Gamari at 2025-10-11T14:06:47-04:00 rts/Scav: Handle WHITEHOLEs in scavenge_one `scavenge_one`, used to scavenge mutable list entries, may encounter `WHITEHOLE`s when the non-moving GC is in use via two paths: 1. when an MVAR is being marked concurrently 2. when the object belongs to a chain of selectors being short-cutted. Fixes #26204. - - - - - 6bd8155c by Matthew Pickering at 2025-10-11T14:07:29-04:00 Add support for generating bytecode objects This commit adds the `-fwrite-byte-code` option which makes GHC emit a `.gbc` file which contains a serialised representation of bytecode. The bytecode can be loaded by the compiler to avoid having to reinterpret a module when using the bytecode interpreter (for example, in GHCi). There are also the new options: * -gbcdir=<DIR>: Specify the directory to place the gbc files * -gbcsuf=<suffix>: Specify the suffix for gbc files The option `-fbyte-code-and-object-code` now implies `-fwrite-byte-code`. These performance tests fail due to https://github.com/haskell/directory/issues/204 ------------------------- Metric Increase: MultiComponentModules MultiLayerModules MultiComponentModulesRecomp MultiLayerModulesRecomp MultiLayerModulesTH_Make MultiLayerModulesTH_OneShot T13701 ------------------------- The bytecode serialisation part was implemented by Cheng Shao Co-authored-by: Cheng Shao <terrorjack(a)type.dance> - - - - - dc8f9599 by Matthew Pickering at 2025-10-11T14:07:30-04:00 Revert "Add a perf test for #26425" This test has a large memory spike currently, which makes the test sensitive, since if you allocate a little more or less, the precise location where GC happens shifts and you observe a different part of the spike. Andreas told me to revert the patch for now, and he will add it back when he fixes the memory spike. This reverts commit 41bdb16fd083110a06507248f648c507a2feb4af. - - - - - e10dcd65 by Sven Tennie at 2025-10-12T10:24:56+00:00 T22859: Increase threadDelay for small machines The previously used thread delay led to failures on my RISC-V test setups. - - - - - d59ef6b6 by Hai / @BestYeen at 2025-10-14T21:51:14-04:00 Change Alex and Happy m4 scripts to display which version was found in the system, adapt small formatting details in Happy script to be more like the Alex script again. - - - - - c98abb6a by Hai / @BestYeen at 2025-10-14T21:52:08-04:00 Update occurrences of return to pure and add a sample for redefining :m to mean :main - - - - - 70ee825a by Cheng Shao at 2025-10-14T21:52:50-04:00 testsuite: fix T3586 for non-SSE3 platforms `T3586.hs` contains `-fvia-C -optc-msse3` which I think is a best-effort basis to harvest the C compiler's auto vectorization optimizations via the C backend back when the test was added. The `-fvia-C` part is now a deprecated no-op because GHC can't fall back to the C backend on a non-unregisterised build, and `-optc-msse3` might actually cause the test to fail on non x86/x64 platforms, e.g. recent builds of wasi-sdk would report `wasm32-wasi-clang: error: unsupported option '-msse3' for target 'wasm32-unknown-wasi'`. So this patch cleans up this historical cruft. `-fvia-C` is removed, and `-optc-msse3` is only passed when cpuid contains `pni` (which indicates support of SSE3). - - - - - 4be32153 by Teo Camarasu at 2025-10-15T08:06:09-04:00 Add submodules for template-haskell-lift and template-haskell-quasiquoter These two new boot libraries expose stable subsets of the template-haskell interface. This is an implemenation of the GHC proposal https://github.com/ghc-proposals/ghc-proposals/pull/696 Work towards #25262 - - - - - 0c00c9c3 by Ben Gamari at 2025-10-15T08:06:51-04:00 rts: Eliminate uses of implicit constant arrays Folding of `const`-sized variable-length arrays to a constant-length array is a gnu extension which clang complains about. Closes #26502. - - - - - bf902a1d by Fendor at 2025-10-15T16:00:59-04:00 Refactor distinct constructor tables map construction Adds `GHC.Types.Unique.FM.alterUFM_L`, `GHC.Types.Unique.DFM.alterUDFM_L` `GHC.Data.Word64Map.alterLookup` to support fusion of distinct constructor data insertion and lookup during the construction of the `DataCon` map in `GHC.Stg.Debug.numberDataCon`. Co-authored-by: Fendor <fendor(a)posteo.de> Co-authored-by: Finley McIlwaine <finleymcilwaine(a)gmail.com> - - - - - b3585ba1 by Fendor at 2025-10-15T16:00:59-04:00 Allow per constructor refinement of distinct-constructor-tables Introduce `-fno-distinct-constructor-tables`. A distinct constructor table configuration is built from the combination of flags given, in order. For example, to only generate distinct constructor tables for a few specific constructors and no others, just pass `-fdistinct-constructor-tables-only=C1,...,CN`. This flag can be supplied multiple times to extend the set of constructors to generate a distinct info table for. You can disable generation of distinct constructor tables for all configurations by passing `-fno-distinct-constructor-tables`. The various configurations of these flags is included in the `DynFlags` fingerprints, which should result in the expected recompilation logic. Adds a test that checks for distinct tables for various given or omitted constructors. Updates CountDepsAst and CountDepsParser tests to account for new dependencies. Fixes #23703 Co-authored-by: Fendor <fendor(a)posteo.de> Co-authored-by: Finley McIlwaine <finleymcilwaine(a)gmail.com> - - - - - e17dc695 by fendor at 2025-10-15T16:01:41-04:00 Fix typos in haddock documentation for stack annotation API - - - - - f85058d3 by Zubin Duggal at 2025-10-17T13:50:52+05:30 compiler: Attempt to systematize Unique tags by introducing an ADT for each different tag Fixes #26264 Metric Decrease: T9233 - - - - - c85c845d by sheaf at 2025-10-17T22:35:32-04:00 Don't prematurely final-zonk PatSyn declarations This commit makes GHC hold off on the final zonk for pattern synonym declarations, in 'GHC.Tc.TyCl.PatSyn.tc_patsyn_finish'. This accommodates the fact that pattern synonym declarations without a type signature can contain unfilled metavariables, e.g. if the RHS of the pattern synonym involves view-patterns whose type mentions promoted (level 0) metavariables. Just like we do for ordinary function bindings, we should allow these metavariables to be settled later, instead of eagerly performing a final zonk-to-type. Now, the final zonking-to-type for pattern synonyms is performed in GHC.Tc.Module.zonkTcGblEnv. Fixes #26465 - - - - - ba3e5bdd by Rodrigo Mesquita at 2025-10-18T16:57:18-04:00 Move code-gen aux symbols from ghc-internal to rts These symbols were all previously defined in ghc-internal and made the dependency structure awkward, where the rts may refer to some of these symbols and had to work around that circular dependency the way described in #26166. Moreover, the code generator will produce code that uses these symbols! Therefore, they should be available in the rts: PRINCIPLE: If the code generator may produce code which uses this symbol, then it should be defined in the rts rather than, say, ghc-internal. That said, the main motivation is towards fixing #26166. Towards #26166. Pre-requisite of !14892 - - - - - f31de2a9 by Ben Gamari at 2025-10-18T16:57:18-04:00 rts: Avoid static symbol references to ghc-internal This resolves #26166, a bug due to new constraints placed by Apple's linker on undefined references. One source of such references in the RTS is the many symbols referenced in ghc-internal. To mitigate #26166, we make these references dynamic, as described in Note [RTS/ghc-internal interface]. Fixes #26166 Co-authored-by: Rodrigo Mesquita <rodrigo.m.mesquita(a)gmail.com> Co-authored-by: Cheng Shao <terrorjack(a)type.dance> - - - - - 43fdfddc by Ben Gamari at 2025-10-18T16:57:18-04:00 compiler: Rename isMathFun -> isLibcFun This set includes more than just math functions. - - - - - 4ed5138f by Ben Gamari at 2025-10-18T16:57:18-04:00 compiler: Add libc allocator functions to libc_funs Prototypes for these are now visible from `Prim.h`, resulting in multiple-declaration warnings in the unregisterised job. - - - - - 9a0a076b by Ben Gamari at 2025-10-18T16:57:18-04:00 rts: Minimize header dependencies of Prim.h Otherwise we will end up with redundant and incompatible declarations resulting in warnings during the unregisterised build. - - - - - 26b8a414 by Diego Antonio Rosario Palomino at 2025-10-18T16:58:10-04:00 Cmm Parser: Fix incorrect example in comment The Parser.y file contains a comment with an incorrect example of textual Cmm (used in .cmm files). This commit updates the comment to ensure it reflects valid textual Cmm syntax. Fixes #26313 - - - - - d4a9d6d6 by ARATA Mizuki at 2025-10-19T18:43:47+09:00 Handle implications between x86 feature flags This includes: * Multiple -msse* options can be specified * -mavx implies -msse4.2 * -mavx2 implies -mavx * -mfma implies -mavx * -mavx512f implies -mavx2 and -mfma * -mavx512{cd,er,pf} imply -mavx512f Closes #24989 Co-authored-by: sheaf <sam.derbyshire(a)gmail.com> - - - - - c9b8465c by Cheng Shao at 2025-10-20T10:16:00-04:00 wasm: workaround WebKit bug in dyld This patch works around a WebKit bug and allows dyld to run on WebKit based platforms as well. See added note for detailed explanation. Co-authored-by: Codex <codex(a)openai.com> - - - - - 91b6be10 by Julian Ospald at 2025-10-20T18:21:03-04:00 Improve error handling in 'getPackageArchives' When the library dirs in the package conf files are not set up correctly, the JS linker will happily ignore such packages and not link against them, although they're part of the link plan. Fixes #26383 - - - - - 6c5269da by Sven Tennie at 2025-10-20T18:21:44-04:00 Align coding style Improve readability by using the same style for all constructor calls in this function. - - - - - 3d305889 by Sven Tennie at 2025-10-20T18:21:44-04:00 Reduce complexity by removing joins with mempty ldArgs, cArgs and cppArgs are all `mempty`. Thus concatenating them adds nothing but some complexity while reading the code. - - - - - 38d65187 by Matthew Pickering at 2025-10-21T13:12:20+01:00 Fix stack decoding when using profiled runtime There are three fixes in this commit. * We need to replicate the `InfoTable` and `InfoTableProf` approach for the other stack constants (see the new Stack.ConstantsProf file). * Then we need to appropiately import the profiled or non-profiled versions. * Finally, there was an incorrect addition in `stackFrameSize`. We need to cast after performing addition on words. Fixes #26507 - - - - - 17231bfb by fendor at 2025-10-21T13:12:20+01:00 Add regression test for #26507 - - - - - 4f5bf93b by Simon Peyton Jones at 2025-10-25T04:05:34-04:00 Postscript to fix for #26255 This MR has comments only - - - - - 6ef22fa0 by IC Rainbow at 2025-10-26T18:23:01-04:00 Add SIMD primops for bitwise logical operations This adds 128-bit wide and/or/xor instructions for X86 NCG, with both SSE and AVX encodings. ``` andFloatX4# :: FloatX4# -> FloatX4# -> FloatX4# -- andps / vandps andDoubleX2# :: DoubleX2# -> DoubleX2# -> DoubleX2# -- andpd / vandpd andInt8X16# :: Int8X16# -> Int8X16# -> Int8X16# -- pand / vpand ``` The new primops are available on ARM when using LLVM backend. Tests added: - simd015 (floats and doubles) - simd016 (integers) - simd017 (words) Fixes #26417 - - - - - fbdc623a by sheaf at 2025-10-26T18:23:52-04:00 Add hints for unsolved HasField constraints This commit adds hints and explanations for unsolved 'HasField' constraints. GHC will now provide additional explanations for an unsolved constraint of the form 'HasField fld_name rec_ty fld_ty'; the details are laid out in Note [Error messages for unsolved HasField constraints], but briefly: 1. Provide similar name suggestions (e.g. mis-spelled field name) and import suggestions (record field not in scope). These result in actionable 'GhcHints', which is helpful to provide code actions in HLS. 2. Explain why GHC did not solve the constraint, e.g.: - 'fld_name' is not a string literal (e.g. a type variable) - 'rec_ty' is a TyCon without any fields, e.g. 'Int' or 'Bool'. - 'fld_ty' contains existentials variables or foralls. - The record field is a pattern synonym field (GHC does not generate HasField instances for those). - 'HasField' is a custom 'TyCon', not actually the built-in 'HasField' typeclass from 'GHC.Records'. On the way, we slightly refactor the mechanisms for import suggestions in GHC.Rename.Unbound. This is to account for the fact that, for 'HasField', we don't care whether the field is imported qualified or unqualified. 'importSuggestions' was refactored, we now have 'sameQualImportSuggestions' and 'anyQualImportSuggestions'. Fixes #18776 #22382 #26480 - - - - - 99d5707f by sheaf at 2025-10-26T18:23:52-04:00 Rename PatSyn MatchContext to PatSynCtx to avoid punning - - - - - 87b43d8e by Apoorv Ingle at 2025-10-26T20:49:14-05:00 This commit: - Streamlines implementations of `tcExpr` and `tcXExpr` to work on `XExpr` Calls `setInGeneratedCode` everytime the typechecker goes over an `XExpr` - Kills `VACtxt` (and its associated VAExpansion and VACall) datatype, it is subsumed by simply a SrcSpan. - Kills the function `addHeadCtxt` as it is now mearly setting a location - The function `tcValArgs` does its own argument number management - Makes `splitHsApps` not look through `XExpr` - `tcExprSigma` is called if the head of the expression after calling `splitHsApps` turns out to be an `XExpr` - Removes location information from `OrigPat` payload - Removes special case of tcBody from `tcLambdaMatches` - Removes special case of `dsExpr` for `ExpandedThingTc` - Moves `setQLInstLevel` inside `tcInstFun` - Rename `HsThingRn` to `SrcCodeCtxt` - Kills `tcl_in_gen_code` and `tcl_err_ctxt`. It is subsumed by `ErrCtxtStack` - Kills `ExpectedFunTyOrig`. It is subsumed by `CtOrigin` - Fixes `CtOrigin` for `HsProjection` case in `exprCtOrigin`. It was previously assigned to be `SectionOrigin`. It is now just the expression - Adds a new `CtOrigin.ExpansionOrigin` for storing the original syntax - Adds a new `CtOrigin.ExpectedTySyntax` as a replacement for `ExpectedTySyntaxOp`. Cannot kill the former yet because of `ApplicativeDo` - Renames `tcMonoExpr` -> `tcMonoLExpr`, `tcMonoExprNC` -> `tcMonoLExpr` - Renames `EValArg`, `EValArgQL` fields: `ea_ctxt` -> `ea_loc_span` and `eaql_ctx` -> `eaql_loc_span` Notes added [Error Context Stack] Notes updated Note [Expanding HsDo with XXExprGhcRn] ------------------------- Metric Decrease: T9020 ------------------------- - - - - - 2285692a by Apoorv Ingle at 2025-10-26T20:49:34-05:00 This commit: - Streamlines implementations of `tcExpr` and `tcXExpr` to work on `XExpr` Calls `setInGeneratedCode` everytime the typechecker goes over an `XExpr` - Kills `VACtxt` (and its associated VAExpansion and VACall) datatype, it is subsumed by simply a SrcSpan. - Kills the function `addHeadCtxt` as it is now mearly setting a location - The function `tcValArgs` does its own argument number management - Makes `splitHsApps` not look through `XExpr` - `tcExprSigma` is called if the head of the expression after calling `splitHsApps` turns out to be an `XExpr` - Removes location information from `OrigPat` payload - Removes special case of tcBody from `tcLambdaMatches` - Removes special case of `dsExpr` for `ExpandedThingTc` - Moves `setQLInstLevel` inside `tcInstFun` - Rename `HsThingRn` to `SrcCodeCtxt` - Kills `tcl_in_gen_code` and `tcl_err_ctxt`. It is subsumed by `ErrCtxtStack` - Kills `ExpectedFunTyOrig`. It is subsumed by `CtOrigin` - Fixes `CtOrigin` for `HsProjection` case in `exprCtOrigin`. It was previously assigned to be `SectionOrigin`. It is now just the expression - Adds a new `CtOrigin.ExpansionOrigin` for storing the original syntax - Adds a new `CtOrigin.ExpectedTySyntax` as a replacement for `ExpectedTySyntaxOp`. Cannot kill the former yet because of `ApplicativeDo` - Renames `tcMonoExpr` -> `tcMonoLExpr`, `tcMonoExprNC` -> `tcMonoLExpr` - Renames `EValArg`, `EValArgQL` fields: `ea_ctxt` -> `ea_loc_span` and `eaql_ctx` -> `eaql_loc_span` Notes added [Error Context Stack] Notes updated Note [Expanding HsDo with XXExprGhcRn] ------------------------- Metric Decrease: T9020 ------------------------- - - - - - 884138ce by Apoorv Ingle at 2025-10-26T20:49:34-05:00 some initial experiment to make ErrCtxt more expressive - - - - - 43aec828 by Apoorv Ingle at 2025-10-26T20:49:34-05:00 bring back tcl_in_gen_code - - - - - 7831fe5c by Apoorv Ingle at 2025-10-26T20:49:34-05:00 wombat - - - - - dace5b21 by Apoorv Ingle at 2025-10-26T20:49:34-05:00 some progress with addArgCtxt - - - - - 6bdab4e0 by Apoorv Ingle at 2025-10-26T20:49:34-05:00 change add arg ctxt to be verbose - - - - - b2a7a323 by Apoorv Ingle at 2025-10-26T20:49:34-05:00 make sure context is not updated when tcl_in_gen is set - - - - - 3bd8e5fd by Apoorv Ingle at 2025-10-26T20:49:34-05:00 remote tcl_in_gen_code - - - - - f90464af by Apoorv Ingle at 2025-10-26T20:49:35-05:00 kill popErrCtxt - - - - - c9d26f37 by Apoorv Ingle at 2025-10-26T21:43:39-05:00 wibbles - - - - - 431 changed files: - .gitlab-ci.yml - .gitlab/generate-ci/gen_ci.hs - .gitlab/jobs.yaml - .gitmodules - compiler/GHC.hs - compiler/GHC/Builtin/PrimOps.hs - compiler/GHC/Builtin/Uniques.hs - compiler/GHC/Builtin/primops.txt.pp - compiler/GHC/ByteCode/Breakpoints.hs - + compiler/GHC/ByteCode/Serialize.hs - compiler/GHC/ByteCode/Types.hs - compiler/GHC/Cmm/CLabel.hs - compiler/GHC/Cmm/Info.hs - compiler/GHC/Cmm/Info/Build.hs - compiler/GHC/Cmm/MachOp.hs - compiler/GHC/Cmm/Parser.y - compiler/GHC/Cmm/Pipeline.hs - compiler/GHC/Cmm/UniqueRenamer.hs - compiler/GHC/CmmToAsm/AArch64/CodeGen.hs - compiler/GHC/CmmToAsm/Config.hs - compiler/GHC/CmmToAsm/Wasm/FromCmm.hs - compiler/GHC/CmmToAsm/X86/CodeGen.hs - compiler/GHC/CmmToAsm/X86/Instr.hs - compiler/GHC/CmmToAsm/X86/Ppr.hs - compiler/GHC/CmmToC.hs - compiler/GHC/CmmToLlvm/Base.hs - compiler/GHC/CmmToLlvm/CodeGen.hs - compiler/GHC/Core/ConLike.hs - compiler/GHC/Core/Make.hs - compiler/GHC/Core/Multiplicity.hs - compiler/GHC/Core/Opt/Monad.hs - compiler/GHC/Core/Opt/Pipeline.hs - compiler/GHC/Core/Opt/Simplify/Monad.hs - compiler/GHC/Core/PatSyn.hs - compiler/GHC/Core/Predicate.hs - compiler/GHC/Core/TyCo/Compare.hs - compiler/GHC/Core/TyCo/Ppr.hs - compiler/GHC/Core/Type.hs - compiler/GHC/CoreToStg/Prep.hs - compiler/GHC/Data/FlatBag.hs - compiler/GHC/Data/SmallArray.hs - compiler/GHC/Data/Word64Map/Internal.hs - compiler/GHC/Data/Word64Map/Lazy.hs - compiler/GHC/Driver/Backend.hs - compiler/GHC/Driver/Backpack.hs - + compiler/GHC/Driver/ByteCode.hs - compiler/GHC/Driver/CodeOutput.hs - compiler/GHC/Driver/Config/CmmToAsm.hs - compiler/GHC/Driver/Config/Finder.hs - compiler/GHC/Driver/Config/Stg/Debug.hs - compiler/GHC/Driver/Downsweep.hs - compiler/GHC/Driver/DynFlags.hs - compiler/GHC/Driver/Env/Types.hs - compiler/GHC/Driver/Errors.hs - compiler/GHC/Driver/Flags.hs - compiler/GHC/Driver/Main.hs - compiler/GHC/Driver/Make.hs - compiler/GHC/Driver/MakeFile.hs - compiler/GHC/Driver/Messager.hs - compiler/GHC/Driver/Monad.hs - compiler/GHC/Driver/Pipeline/Execute.hs - compiler/GHC/Driver/Session.hs - compiler/GHC/Hs.hs - compiler/GHC/Hs/Decls.hs - compiler/GHC/Hs/Expr.hs - compiler/GHC/Hs/Instances.hs - compiler/GHC/Hs/Type.hs - compiler/GHC/HsToCore/Breakpoints.hs - compiler/GHC/HsToCore/Expr.hs - compiler/GHC/HsToCore/Foreign/C.hs - compiler/GHC/HsToCore/Foreign/JavaScript.hs - compiler/GHC/HsToCore/Foreign/Wasm.hs - compiler/GHC/HsToCore/Match.hs - compiler/GHC/HsToCore/Monad.hs - compiler/GHC/HsToCore/Pmc.hs - compiler/GHC/HsToCore/Pmc/Utils.hs - compiler/GHC/HsToCore/Quote.hs - compiler/GHC/HsToCore/Ticks.hs - compiler/GHC/HsToCore/Usage.hs - compiler/GHC/HsToCore/Utils.hs - compiler/GHC/Iface/Binary.hs - compiler/GHC/Iface/Decl.hs - compiler/GHC/Iface/Ext/Ast.hs - compiler/GHC/Iface/Flags.hs - compiler/GHC/Iface/Load.hs - compiler/GHC/Iface/Make.hs - compiler/GHC/Iface/Recomp/Flags.hs - compiler/GHC/Iface/Rename.hs - compiler/GHC/Iface/Type.hs - compiler/GHC/JS/JStg/Monad.hs - compiler/GHC/Linker/Deps.hs - compiler/GHC/Linker/Dynamic.hs - compiler/GHC/Linker/Loader.hs - compiler/GHC/Linker/Static.hs - compiler/GHC/Linker/Types.hs - compiler/GHC/Parser/Header.hs - compiler/GHC/Platform.hs - compiler/GHC/Platform/Reg.hs - compiler/GHC/Rename/Bind.hs - compiler/GHC/Rename/Expr.hs - compiler/GHC/Rename/Names.hs - compiler/GHC/Rename/Unbound.hs - compiler/GHC/Rename/Utils.hs - compiler/GHC/Runtime/Eval.hs - compiler/GHC/Stg/Debug.hs - + compiler/GHC/Stg/Debug/Types.hs - compiler/GHC/Stg/EnforceEpt.hs - compiler/GHC/Stg/Pipeline.hs - compiler/GHC/StgToCmm/ExtCode.hs - compiler/GHC/StgToCmm/Monad.hs - compiler/GHC/StgToCmm/Prim.hs - compiler/GHC/StgToJS/CodeGen.hs - compiler/GHC/StgToJS/Ids.hs - compiler/GHC/StgToJS/Linker/Linker.hs - compiler/GHC/StgToJS/Prim.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/App.hs-boot - compiler/GHC/Tc/Gen/Do.hs - compiler/GHC/Tc/Gen/Expr.hs - compiler/GHC/Tc/Gen/Expr.hs-boot - 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/Instance/Class.hs - compiler/GHC/Tc/Module.hs - compiler/GHC/Tc/Solver.hs - compiler/GHC/Tc/Solver/Equality.hs - compiler/GHC/Tc/Solver/Monad.hs - compiler/GHC/Tc/Solver/Solve.hs - compiler/GHC/Tc/TyCl.hs - compiler/GHC/Tc/TyCl/PatSyn.hs - compiler/GHC/Tc/TyCl/Utils.hs - compiler/GHC/Tc/Types.hs - compiler/GHC/Tc/Types/Constraint.hs - compiler/GHC/Tc/Types/CtLoc.hs - compiler/GHC/Tc/Types/ErrCtxt.hs - compiler/GHC/Tc/Types/LclEnv.hs - compiler/GHC/Tc/Types/Origin.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/Utils/Unify.hs-boot - compiler/GHC/Tc/Validity.hs - compiler/GHC/Tc/Zonk/Type.hs - compiler/GHC/Types/Hint.hs - compiler/GHC/Types/Hint/Ppr.hs - compiler/GHC/Types/Name/Cache.hs - compiler/GHC/Types/SourceError.hs - compiler/GHC/Types/SptEntry.hs - compiler/GHC/Types/Tickish.hs - compiler/GHC/Types/TyThing/Ppr.hs - compiler/GHC/Types/Unique.hs - compiler/GHC/Types/Unique/DFM.hs - compiler/GHC/Types/Unique/DSM.hs - compiler/GHC/Types/Unique/FM.hs - compiler/GHC/Types/Unique/Supply.hs - compiler/GHC/Unit/Finder.hs - compiler/GHC/Unit/Finder/Types.hs - compiler/GHC/Unit/Module/Graph.hs - compiler/GHC/Unit/Module/Location.hs - compiler/GHC/Unit/Module/ModSummary.hs - compiler/GHC/Unit/Module/WholeCoreBindings.hs - compiler/GHC/Utils/Binary.hs - compiler/GHC/Utils/Error.hs - compiler/GHC/Utils/Outputable.hs - compiler/Language/Haskell/Syntax/Binds.hs - compiler/Language/Haskell/Syntax/Expr.hs - compiler/ghc.cabal.in - docs/users_guide/9.16.1-notes.rst - docs/users_guide/debug-info.rst - docs/users_guide/ghci.rst - docs/users_guide/phases.rst - docs/users_guide/separate_compilation.rst - docs/users_guide/using.rst - ghc/GHCi/UI.hs - hadrian/bindist/config.mk.in - hadrian/src/Packages.hs - hadrian/src/Rules/Gmp.hs - hadrian/src/Rules/Libffi.hs - hadrian/src/Settings/Builders/Cabal.hs - hadrian/src/Settings/Builders/Common.hs - hadrian/src/Settings/Builders/DeriveConstants.hs - hadrian/src/Settings/Builders/Hsc2Hs.hs - hadrian/src/Settings/Default.hs - hadrian/src/Settings/Packages.hs - libraries/base/src/GHC/Base.hs - libraries/base/src/GHC/Exts.hs - libraries/ghc-experimental/CHANGELOG.md - libraries/ghc-experimental/src/GHC/Stack/Annotation/Experimental.hs - + libraries/ghc-internal/cbits/RtsIface.c - libraries/ghc-internal/cbits/Stack_c.c - libraries/ghc-internal/ghc-internal.cabal.in - + libraries/ghc-internal/include/RtsIfaceSymbols.h - + libraries/ghc-internal/src/GHC/Internal/Stack/ConstantsProf.hsc - libraries/ghc-internal/src/GHC/Internal/Stack/Decode.hs - libraries/ghc-internal/src/GHC/Internal/TH/Lift.hs - libraries/ghc-internal/src/GHC/Internal/TH/Quote.hs - + libraries/ghc-internal/tests/backtraces/T26507.hs - + libraries/ghc-internal/tests/backtraces/T26507.stderr - libraries/ghc-internal/tests/backtraces/all.T - libraries/ghc-internal/tests/stack-annotation/all.T - libraries/ghc-prim/changelog.md - + libraries/template-haskell-lift - + libraries/template-haskell-quasiquoter - m4/fptools_alex.m4 - m4/fptools_happy.m4 - rts/BuiltinClosures.c - rts/CloneStack.h - rts/Compact.cmm - rts/ContinuationOps.cmm - rts/Exception.cmm - rts/Prelude.h - rts/PrimOps.cmm - rts/Printer.c - rts/RtsAPI.c - rts/RtsStartup.c - rts/RtsSymbols.c - + rts/RtsToHsIface.c - rts/StgStdThunks.cmm - rts/configure.ac - − rts/external-symbols.list.in - rts/include/Rts.h - rts/include/RtsAPI.h - rts/include/Stg.h - + rts/include/rts/RtsToHsIface.h - rts/include/rts/Types.h - rts/include/rts/storage/Block.h - rts/include/stg/Prim.h - rts/posix/OSMem.c - rts/posix/Signals.c - libraries/ghc-internal/cbits/atomic.c → rts/prim/atomic.c - libraries/ghc-internal/cbits/bitrev.c → rts/prim/bitrev.c - libraries/ghc-internal/cbits/bswap.c → rts/prim/bswap.c - libraries/ghc-internal/cbits/clz.c → rts/prim/clz.c - libraries/ghc-internal/cbits/ctz.c → rts/prim/ctz.c - libraries/ghc-internal/cbits/int64x2minmax.c → rts/prim/int64x2minmax.c - libraries/ghc-internal/cbits/longlong.c → rts/prim/longlong.c - libraries/ghc-internal/cbits/mulIntMayOflo.c → rts/prim/mulIntMayOflo.c - libraries/ghc-internal/cbits/pdep.c → rts/prim/pdep.c - libraries/ghc-internal/cbits/pext.c → rts/prim/pext.c - libraries/ghc-internal/cbits/popcnt.c → rts/prim/popcnt.c - libraries/ghc-internal/cbits/vectorQuotRem.c → rts/prim/vectorQuotRem.c - libraries/ghc-internal/cbits/word2float.c → rts/prim/word2float.c - − rts/rts.buildinfo.in - rts/rts.cabal - rts/sm/NonMoving.c - rts/sm/NonMovingMark.c - rts/sm/Scav.c - rts/wasm/JSFFI.c - rts/wasm/scheduler.cmm - rts/win32/libHSghc-internal.def - testsuite/driver/cpu_features.py - testsuite/tests/bytecode/T24634/T24634a.stdout - testsuite/tests/bytecode/T24634/T24634b.stdout - 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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/436d9f72a594aefd81f4be10291677… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/436d9f72a594aefd81f4be10291677… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/backports-9.14] 3 commits: testsuite: Accept new base-exports output
by Ben Gamari (＠bgamari) 26 Oct '25

26 Oct '25

Ben Gamari pushed to branch wip/backports-9.14 at Glasgow Haskell Compiler / GHC Commits: a343b2a3 by Ben Gamari at 2025-10-26T20:05:37-04:00 testsuite: Accept new base-exports output - - - - - df252ddd by Ben Gamari at 2025-10-26T20:05:37-04:00 template-haskell: Accept T15321 - - - - - 405c2315 by Ben Gamari at 2025-10-26T20:05:37-04:00 testsuite: Accept new template-haskell-exports output - - - - - 8 changed files: - testsuite/tests/interface-stability/base-exports.stdout - testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs - testsuite/tests/interface-stability/base-exports.stdout-mingw32 - testsuite/tests/interface-stability/base-exports.stdout-ws-32 - testsuite/tests/interface-stability/ghc-experimental-exports.stdout - testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32 - testsuite/tests/interface-stability/template-haskell-exports.stdout - testsuite/tests/th/T15321.stderr The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/387872bdf05feec31489a5f0873a58… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/387872bdf05feec31489a5f0873a58… You're receiving this email because of your account on gitlab.haskell.org.

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