[Git][ghc/ghc][wip/fendor/ghc-pkg-ospath] Migrate `ghc-pkg` to use `OsPath` and `file-io`
by Hannes Siebenhandl (＠fendor) 16 Apr '26
by Hannes Siebenhandl (＠fendor) 16 Apr '26
16 Apr '26
Hannes Siebenhandl pushed to branch wip/fendor/ghc-pkg-ospath at Glasgow Haskell Compiler / GHC
Commits:
0a42990e by Fendor at 2026-04-16T12:34:07+02:00
Migrate `ghc-pkg` to use `OsPath` and `file-io`
`ghc-pkg` should use UNC paths as much as possible to avoid MAX_PATH
issues on windows.
`file-io` uses UNC Paths by default on windows, ensuring we use the
correct APIs and that we finally are no longer plagued by MAX_PATH
issues in CI and private machines.
On top of it, the higher correctness of `OsPath` is appreciated in this
small codebase. Also, we improve memory usage very slightly, due to the
more efficient memory representation of `OsPath` over `FilePath`
Adds `ghc-pkg` regression test for MAX_PATH on windows
Make sure `ghc-pkg` behaves as expected when long paths (> 255) are
involved on windows.
Let's generate a testcase where we can actually observe that `ghc-pkg`
behaves as epxected.
See the documentation for windows on Maximum Path Length Limitation:
* `https://learn.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation`
Adds changelog entry for long path support in ghc-pkg.
- - - - -
9 changed files:
- + changelog.d/ghc-pkg-long-path-support
- compiler/GHC/Unit/State.hs
- libraries/ghc-boot/GHC/Unit/Database.hs
- libraries/ghc-boot/ghc-boot.cabal.in
- testsuite/tests/cabal/Makefile
- testsuite/tests/cabal/all.T
- + testsuite/tests/cabal/ghcpkg10.stdout
- utils/ghc-pkg/Main.hs
- utils/ghc-pkg/ghc-pkg.cabal.in
Changes:
=====================================
changelog.d/ghc-pkg-long-path-support
=====================================
@@ -0,0 +1,15 @@
+section: ghc-pkg
+synopsis: Improve ``ghc-pkg``'s support for long paths on windows.
+issues: #26960
+mrs: !15584
+
+description: {
+ ``ghc-pkg`` can't handle working with file paths longer than the MAX_PATH
+ restrictions on windows as it is not using UNC file paths by default.
+
+ By using UNC file paths whenever possible, we improve ``ghc-pkg`` on windows.
+ Note, this still requires the user to enable the use of long paths in order to opt-in
+ this behaviour on older windows machines.
+}
+
+
=====================================
compiler/GHC/Unit/State.hs
=====================================
@@ -802,7 +802,7 @@ readUnitDatabase logger cfg conf_file = do
if cache_exists
then do
debugTraceMsg logger 2 $ text "Using binary package database:" <+> ppr filename
- readPackageDbForGhc (OsPath.unsafeDecodeUtf filename)
+ readPackageDbForGhc filename
else do
-- If there is no package.cache file, we check if the database is not
-- empty by inspecting if the directory contains any .conf file. If it
=====================================
libraries/ghc-boot/GHC/Unit/Database.hs
=====================================
@@ -68,6 +68,8 @@ module GHC.Unit.Database
-- * Misc
, mkMungePathUrl
, mungeUnitInfoPaths
+ , writeFileAtomic
+ , unsafeDecodeUtf
)
where
@@ -86,18 +88,23 @@ import Data.Binary.Get as Bin
import Data.List (intersperse)
import Control.Exception as Exception
import Control.Monad (when)
-import System.FilePath as FilePath
+import qualified System.FilePath as FilePath
#if !defined(mingw32_HOST_OS)
import Data.Bits ((.|.))
-import System.Posix.Files
+import System.Posix.Files.PosixString
import System.Posix.Types (FileMode)
+import System.OsString.Internal.Types (getOsString)
#endif
import System.IO
import System.IO.Error
import GHC.IO.Exception (IOErrorType(InappropriateType))
import qualified GHC.Data.ShortText as ST
import GHC.IO.Handle.Lock
-import System.Directory
+import GHC.Stack.Types (HasCallStack)
+import System.OsPath
+import qualified System.Directory.OsPath as OsPath
+import qualified System.Directory.Internal as OsPath.Internal
+import qualified System.File.OsPath as FileIO
-- | @ghc-boot@'s UnitInfo, serialized to the database.
type DbUnitInfo = GenericUnitInfo BS.ByteString BS.ByteString BS.ByteString BS.ByteString DbModule
@@ -314,13 +321,13 @@ data DbInstUnitId
newtype PackageDbLock = PackageDbLock Handle
-- | Acquire an exclusive lock related to package DB under given location.
-lockPackageDb :: FilePath -> IO PackageDbLock
+lockPackageDb :: OsPath -> IO PackageDbLock
-- | Release the lock related to package DB.
unlockPackageDb :: PackageDbLock -> IO ()
-- | Acquire a lock of given type related to package DB under given location.
-lockPackageDbWith :: LockMode -> FilePath -> IO PackageDbLock
+lockPackageDbWith :: LockMode -> OsPath -> IO PackageDbLock
lockPackageDbWith mode file = do
-- We are trying to open the lock file and then lock it. Thus the lock file
-- needs to either exist or we need to be able to create it. Ideally we
@@ -350,10 +357,10 @@ lockPackageDbWith mode file = do
(lockFileOpenIn ReadWriteMode)
(const $ lockFileOpenIn ReadMode)
where
- lock = file <.> "lock"
+ lock = file <.> OsPath.Internal.os "lock"
lockFileOpenIn io_mode = bracketOnError
- (openBinaryFile lock io_mode)
+ (FileIO.openBinaryFile lock io_mode)
hClose
-- If file locking support is not available, ignore the error and proceed
-- normally. Without it the only thing we lose on non-Windows platforms is
@@ -387,7 +394,7 @@ isDbOpenReadMode = \case
-- | Read the part of the package DB that GHC is interested in.
--
-readPackageDbForGhc :: FilePath -> IO [DbUnitInfo]
+readPackageDbForGhc :: OsPath -> IO [DbUnitInfo]
readPackageDbForGhc file =
decodeFromFile file DbOpenReadOnly getDbForGhc >>= \case
(pkgs, DbOpenReadOnly) -> return pkgs
@@ -409,7 +416,7 @@ readPackageDbForGhc file =
-- we additionally receive a PackageDbLock that represents a lock on the
-- database, so that we can safely update it later.
--
-readPackageDbForGhcPkg :: Binary pkgs => FilePath -> DbOpenMode mode t ->
+readPackageDbForGhcPkg :: Binary pkgs => OsPath -> DbOpenMode mode t ->
IO (pkgs, DbOpenMode mode PackageDbLock)
readPackageDbForGhcPkg file mode =
decodeFromFile file mode getDbForGhcPkg
@@ -425,7 +432,7 @@ readPackageDbForGhcPkg file mode =
-- | Write the whole of the package DB, both parts.
--
-writePackageDb :: Binary pkgs => FilePath -> [DbUnitInfo] -> pkgs -> IO ()
+writePackageDb :: Binary pkgs => OsPath -> [DbUnitInfo] -> pkgs -> IO ()
writePackageDb file ghcPkgs ghcPkgPart = do
writeFileAtomic file (runPut putDbForGhcPkg)
#if !defined(mingw32_HOST_OS)
@@ -446,10 +453,10 @@ writePackageDb file ghcPkgs ghcPkgPart = do
ghcPart = encode ghcPkgs
#if !defined(mingw32_HOST_OS)
-addFileMode :: FilePath -> FileMode -> IO ()
+addFileMode :: OsPath -> FileMode -> IO ()
addFileMode file m = do
- o <- fileMode <$> getFileStatus file
- setFileMode file (m .|. o)
+ o <- fileMode <$> getFileStatus (getOsString file)
+ setFileMode (getOsString file) (m .|. o)
#endif
getHeader :: Get (Word32, Word32)
@@ -496,7 +503,7 @@ headerMagic = BS.Char8.pack "\0ghcpkg\0"
-- | Feed a 'Get' decoder with data chunks from a file.
--
-decodeFromFile :: FilePath -> DbOpenMode mode t -> Get pkgs ->
+decodeFromFile :: OsPath -> DbOpenMode mode t -> Get pkgs ->
IO (pkgs, DbOpenMode mode PackageDbLock)
decodeFromFile file mode decoder = case mode of
DbOpenReadOnly -> do
@@ -517,7 +524,7 @@ decodeFromFile file mode decoder = case mode of
bracketOnError (lockPackageDb file) unlockPackageDb $ \lock -> do
(, DbOpenReadWrite lock) <$> decodeFileContents
where
- decodeFileContents = withBinaryFile file ReadMode $ \hnd ->
+ decodeFileContents = FileIO.withBinaryFile file ReadMode $ \hnd ->
feed hnd (runGetIncremental decoder)
feed hnd (Partial k) = do chunk <- BS.hGet hnd BS.Lazy.defaultChunkSize
@@ -527,21 +534,21 @@ decodeFromFile file mode decoder = case mode of
feed _ (Done _ _ res) = return res
feed _ (Fail _ _ msg) = ioError err
where
- err = mkIOError InappropriateType loc Nothing (Just file)
+ err = mkIOError InappropriateType loc Nothing (Just $ unsafeDecodeUtf file)
`ioeSetErrorString` msg
loc = "GHC.Unit.Database.readPackageDb"
-- Copied from Cabal's Distribution.Simple.Utils.
-writeFileAtomic :: FilePath -> BS.Lazy.ByteString -> IO ()
+writeFileAtomic :: OsPath -> BS.Lazy.ByteString -> IO ()
writeFileAtomic targetPath content = do
let (targetDir, targetFile) = splitFileName targetPath
Exception.bracketOnError
- (openBinaryTempFileWithDefaultPermissions targetDir $ targetFile <.> "tmp")
- (\(tmpPath, handle) -> hClose handle >> removeFile tmpPath)
+ (FileIO.openBinaryTempFileWithDefaultPermissions targetDir $ targetFile <.> OsPath.Internal.os "tmp")
+ (\(tmpPath, handle) -> hClose handle >> OsPath.removeFile tmpPath)
(\(tmpPath, handle) -> do
BS.Lazy.hPut handle content
hClose handle
- renameFile tmpPath targetPath)
+ OsPath.renameFile tmpPath targetPath)
instance Binary DbUnitInfo where
put (GenericUnitInfo
@@ -711,7 +718,7 @@ mkMungePathUrl top_dir pkgroot = (munge_path, munge_url)
-- rather than letting FilePath change it to use \ as the separator
stripVarPrefix var path = case ST.stripPrefix var path of
Just "" -> Just ""
- Just cs | isPathSeparator (ST.head cs) -> Just cs
+ Just cs | FilePath.isPathSeparator (ST.head cs) -> Just cs
_ -> Nothing
@@ -742,3 +749,8 @@ mungeUnitInfoPaths top_dir pkgroot pkg =
munge_paths = map munge_path
munge_urls = map munge_url
(munge_path,munge_url) = mkMungePathUrl top_dir pkgroot
+
+-- | Decode an 'OsPath' to 'FilePath', throwing an 'error' if decoding failed.
+-- Prefer 'decodeUtf' and gracious error handling.
+unsafeDecodeUtf :: HasCallStack => OsPath -> FilePath
+unsafeDecodeUtf = OsPath.Internal.so
=====================================
libraries/ghc-boot/ghc-boot.cabal.in
=====================================
@@ -82,6 +82,8 @@ Library
containers >= 0.5 && < 0.9,
directory >= 1.2 && < 1.4,
filepath >= 1.3 && < 1.6,
+ file-io >= 0.1.6 && < 0.3,
+ os-string >= 2.0.1 && < 2.1,
deepseq >= 1.4 && < 1.6,
ghc-platform >= 0.1,
ghc-toolchain >= 0.1
=====================================
testsuite/tests/cabal/Makefile
=====================================
@@ -79,6 +79,25 @@ ghcpkg04 :
@: # testpkg-1.2.3.4 and newtestpkg-2.0 are both exposed now
'$(TEST_HC)' $(TEST_HC_OPTS) -package-db $(PKGCONF04) -c ghcpkg04.hs || true
+PKGCONF20=local20.package.conf
+LOCAL_GHC_PKG20 = '$(GHC_PKG)' --no-user-package-db
+
+DIR1=asdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdf
+DIR2=zxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcv
+DIR3=uiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiop
+DIR4=qwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwer
+WDIR=$(DIR1)/$(DIR2)/$(DIR3)/$(DIR4)
+.PHONY: ghcpkg10
+ghcpkg10 :
+ @mkdir -p $(WDIR)
+ @rm -rf $(WDIR)/$(PKGCONF20)
+ $(LOCAL_GHC_PKG20) -f $(WDIR)/$(PKGCONF20) init $(WDIR)/$(PKGCONF20)
+ $(LOCAL_GHC_PKG20) -f $(WDIR)/$(PKGCONF20) list
+ $(LOCAL_GHC_PKG20) -f $(WDIR)/$(PKGCONF20) register --force test.pkg 2>/dev/null
+ $(LOCAL_GHC_PKG20) -f $(WDIR)/$(PKGCONF20) describe testpkg | $(STRIP_PKGROOT)
+ $(LOCAL_GHC_PKG20) -f $(WDIR)/$(PKGCONF20) describe testpkg-1.2.3.4 | $(STRIP_PKGROOT)
+ $(LOCAL_GHC_PKG20) -f $(WDIR)/$(PKGCONF20) field testpkg-1.2.3.4 import-dirs
+
# Test stacking of package.confs (also #2441)
PKGCONF05a=local05a.package.conf
PKGCONF05b=local05b.package.conf
=====================================
testsuite/tests/cabal/all.T
=====================================
@@ -5,6 +5,7 @@ def ignore_warnings(str):
return re.sub(r'Warning:.*\n', '', str)
test('ghcpkg01', [extra_files(['test.pkg', 'test2.pkg', 'test3.pkg'])], makefile_test, [])
+test('ghcpkg10', [extra_files(['test.pkg', 'test2.pkg', 'test3.pkg'])], makefile_test, [])
# Use ignore_stderr to prevent (when HADDOCK_DOCS=NO):
# warning: haddock-interfaces .. doesn't exist or isn't a file
=====================================
testsuite/tests/cabal/ghcpkg10.stdout
=====================================
@@ -0,0 +1,50 @@
+asdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdf/zxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcv/uiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiopuiop/qwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwerqwer/local20.package.conf
+ (no packages)
+Reading package info from "test.pkg" ... done.
+name: testpkg
+version: 1.2.3.4
+visibility: public
+id: testpkg-1.2.3.4-XXX
+key: testpkg-1.2.3.4-XXX
+license: BSD3
+copyright: (c) The Univsersity of Glasgow 2004
+maintainer: glasgow-haskell-users(a)haskell.org
+author: simonmar(a)microsoft.com
+stability: stable
+homepage: http://www.haskell.org/ghc
+package-url: http://www.haskell.org/ghc
+description: A Test Package
+category: none
+exposed: True
+exposed-modules: A
+hidden-modules: B C.D
+import-dirs: /usr/local/lib/testpkg "c:/Program Files/testpkg"
+library-dirs: /usr/local/lib/testpkg "c:/Program Files/testpkg"
+hs-libraries: testpkg-1.2.3.4-XXX
+include-dirs: /usr/local/include/testpkg "c:/Program Files/testpkg"
+pkgroot:
+
+name: testpkg
+version: 1.2.3.4
+visibility: public
+id: testpkg-1.2.3.4-XXX
+key: testpkg-1.2.3.4-XXX
+license: BSD3
+copyright: (c) The Univsersity of Glasgow 2004
+maintainer: glasgow-haskell-users(a)haskell.org
+author: simonmar(a)microsoft.com
+stability: stable
+homepage: http://www.haskell.org/ghc
+package-url: http://www.haskell.org/ghc
+description: A Test Package
+category: none
+exposed: True
+exposed-modules: A
+hidden-modules: B C.D
+import-dirs: /usr/local/lib/testpkg "c:/Program Files/testpkg"
+library-dirs: /usr/local/lib/testpkg "c:/Program Files/testpkg"
+hs-libraries: testpkg-1.2.3.4-XXX
+include-dirs: /usr/local/include/testpkg "c:/Program Files/testpkg"
+pkgroot:
+
+import-dirs: /usr/local/lib/testpkg "c:/Program Files/testpkg"
=====================================
utils/ghc-pkg/Main.hs
=====================================
@@ -47,12 +47,19 @@ import Distribution.Types.UnqualComponentName
import Distribution.Types.LibraryName
import Distribution.Types.MungedPackageName
import Distribution.Types.MungedPackageId
-import Distribution.Simple.Utils (toUTF8BS, writeUTF8File, readUTF8File)
+import Distribution.Simple.Utils (ignoreBOM, toUTF8BS, toUTF8LBS, fromUTF8LBS)
import qualified Data.Version as Version
-import System.FilePath as FilePath
+import System.OsPath as OsPath
+import qualified System.FilePath as FilePath
import qualified System.FilePath.Posix as FilePath.Posix
-import System.Directory ( getXdgDirectory, createDirectoryIfMissing, getAppUserDataDirectory,
- getModificationTime, XdgDirectory ( XdgData ) )
+import System.Directory.OsPath
+ ( getXdgDirectory, createDirectoryIfMissing, getAppUserDataDirectory,
+ getModificationTime, XdgDirectory ( XdgData ),
+ doesDirectoryExist, getDirectoryContents,
+ doesFileExist, removeFile,
+ getCurrentDirectory )
+import System.Directory.Internal (os)
+import qualified System.File.OsPath as FileIO
import Text.Printf
import Prelude hiding (Foldable(..))
@@ -65,15 +72,13 @@ import Data.Bifunctor
import Data.Char ( toLower )
import Control.Monad
-import System.Directory ( doesDirectoryExist, getDirectoryContents,
- doesFileExist, removeFile,
- getCurrentDirectory )
import System.Exit ( exitWith, ExitCode(..) )
import System.Environment ( getArgs, getProgName, getEnv )
import System.IO
import System.IO.Error
-import GHC.IO ( catchException )
+import GHC.IO ( catchException, unsafePerformIO )
import GHC.IO.Exception (IOErrorType(InappropriateType))
+import GHC.Stack.Types (HasCallStack)
import Data.List ( group, sort, sortBy, nub, partition, find
, intercalate, intersperse, unfoldr
, isInfixOf, isSuffixOf, isPrefixOf, stripPrefix )
@@ -429,8 +434,9 @@ runit verbosity cli nonopts = do
print filename
glob filename >>= print
#endif
- ["init", filename] ->
- initPackageDB filename verbosity cli
+ ["init", filename] -> do
+ filenameOs <- encodeFS filename
+ initPackageDB filenameOs verbosity cli
["register", filename] ->
registerPackage filename verbosity cli
multi_instance
@@ -538,7 +544,7 @@ readPackageArg AsDefault str = Id <$> readGlobPkgId str
data PackageDB (mode :: GhcPkg.DbMode)
= PackageDB {
- location, locationAbsolute :: !FilePath,
+ location, locationAbsolute :: !OsPath,
-- We need both possibly-relative and definitely-absolute package
-- db locations. This is because the relative location is used as
-- an identifier for the db, so it is important we do not modify it.
@@ -570,14 +576,14 @@ allPackagesInStack = concatMap packages
-- specified package DB can depend on, since dependencies can only extend
-- down the stack, not up (e.g. global packages cannot depend on user
-- packages).
-stackUpTo :: FilePath -> PackageDBStack -> PackageDBStack
+stackUpTo :: OsPath -> PackageDBStack -> PackageDBStack
stackUpTo to_modify = dropWhile ((/= to_modify) . location)
-readFromSettingsFile :: FilePath
- -> (FilePath -> RawSettings -> Either String b)
+readFromSettingsFile :: OsPath
+ -> (OsPath -> RawSettings -> Either String b)
-> IO (Either String b)
readFromSettingsFile settingsFile f = do
- settingsStr <- readFile settingsFile
+ settingsStr <- readUtf8File settingsFile
pure $ do
mySettings <- case maybeReadFuzzy settingsStr of
Just s -> pure $ Map.fromList s
@@ -586,11 +592,11 @@ readFromSettingsFile settingsFile f = do
Nothing -> Left $ "Can't parse settings file " ++ show settingsFile
f settingsFile mySettings
-readFromTargetFile :: FilePath
+readFromTargetFile :: OsPath
-> (Target -> b)
-> IO (Either String b)
readFromTargetFile targetFile f = do
- targetStr <- readFile targetFile
+ targetStr <- readUtf8File targetFile
pure $ do
target <- case maybeReadFuzzy targetStr of
Just t -> Right t
@@ -626,33 +632,35 @@ getPkgDatabases verbosity mode use_user use_cache expand_vars my_flags = do
case [ f | FlagGlobalConfig f <- my_flags ] of
-- See Note [Base Dir] for more information on the base dir / top dir.
[] -> do mb_dir <- getBaseDir
- case mb_dir of
+ mb_dir_os <- traverse encodeFS mb_dir
+ case mb_dir_os of
Nothing -> die err_msg
Just dir -> do
-- Look for where it is given in the settings file, if marked there.
-- See Note [Settings file] about this file, and why we need GHC to share it with us.
- let settingsFile = dir </> "settings"
+ let settingsFile = dir </> os "settings"
exists_settings_file <- doesFileExist settingsFile
erel_db <-
if exists_settings_file
- then readFromSettingsFile settingsFile getGlobalPackageDb
- else pure (Left ("Settings file doesn't exist: " ++ settingsFile))
+ then do
+ readFromSettingsFile settingsFile (\ settings -> getGlobalPackageDb (unsafeDecodeUtf settings))
+ else pure (Left ("Settings file doesn't exist: " ++ showOsPath settingsFile))
case erel_db of
- Right rel_db -> return (dir, dir </> rel_db)
+ Right rel_db -> return (dir, dir </> unsafeEncodeUtf rel_db)
-- If the version of GHC doesn't have this field or the settings file
-- doesn't exist for some reason, look in the libdir.
Left err -> do
r <- lookForPackageDBIn dir
case r of
- Nothing -> die (unlines [err, ("Fallback: Can't find package database in " ++ dir)])
+ Nothing -> die (unlines [err, ("Fallback: Can't find package database in " ++ showOsPath dir)])
Just path -> return (dir, path)
fs -> do
-- The value of the $topdir variable used in some package descriptions
-- Note that the way we calculate this is slightly different to how it
-- is done in ghc itself. We rely on the convention that the global
-- package db lives in ghc's libdir.
- let pkg_db = last fs
+ let pkg_db = unsafeEncodeUtf $ last fs
top_dir <- absolutePath (takeDirectory pkg_db)
return (top_dir, pkg_db)
@@ -662,10 +670,10 @@ getPkgDatabases verbosity mode use_user use_cache expand_vars my_flags = do
-- getXdgDirectory can fail (e.g. if $HOME isn't set)
mb_user_conf <-
- case [ f | FlagUserConfig f <- my_flags ] of
+ case [ unsafeEncodeUtf f | FlagUserConfig f <- my_flags ] of
_ | no_user_db -> return Nothing
[] -> do
- let targetFile = top_dir </> "targets" </> "default.target"
+ let targetFile = top_dir </> os "targets" </> os "default.target"
exists_settings_file <- doesFileExist targetFile
targetArchOS <- case exists_settings_file of
False -> do
@@ -694,15 +702,15 @@ getPkgDatabases verbosity mode use_user use_cache expand_vars my_flags = do
-- otherwise we use $XDG_DATA_HOME/$UNIQUE_SUBDIR
--
-- UNIQUE_SUBDIR is typically a combination of the target platform and GHC version
- m_appdir <- getFirstSuccess $ map (fmap (</> subdir))
- [ getAppUserDataDirectory "ghc" -- this is ~/.ghc/
- , getXdgDirectory XdgData "ghc" -- this is $XDG_DATA_HOME/
+ m_appdir <- getFirstSuccess $ map (fmap (</> unsafeEncodeUtf subdir))
+ [ getAppUserDataDirectory $ os "ghc" -- this is ~/.ghc/
+ , getXdgDirectory XdgData $ os "ghc" -- this is $XDG_DATA_HOME/
]
case m_appdir of
Nothing -> return Nothing
Just dir -> do
lookForPackageDBIn dir >>= \case
- Nothing -> return (Just (dir </> "package.conf.d", False))
+ Nothing -> return (Just (dir </> os "package.conf.d", False))
Just f -> return (Just (f, True))
fs -> return (Just (last fs, True))
@@ -716,11 +724,11 @@ getPkgDatabases verbosity mode use_user use_cache expand_vars my_flags = do
e_pkg_path <- tryIO (System.Environment.getEnv "GHC_PACKAGE_PATH")
let env_stack =
- case e_pkg_path of
+ case fmap unsafeEncodeUtf e_pkg_path of
Left _ -> sys_databases
Right path
- | not (null path) && isSearchPathSeparator (last path)
- -> splitSearchPath (init path) ++ sys_databases
+ | hasTrailingPathSeparator path
+ -> splitSearchPath (dropTrailingPathSeparator path) <> sys_databases
| otherwise
-> splitSearchPath path
@@ -733,7 +741,7 @@ getPkgDatabases verbosity mode use_user use_cache expand_vars my_flags = do
| Just (user_conf, _user_exists) <- mb_user_conf
= Just user_conf
is_db_flag FlagGlobal = Just virt_global_conf
- is_db_flag (FlagConfig f) = Just f
+ is_db_flag (FlagConfig f) = Just $ unsafeEncodeUtf f
is_db_flag _ = Nothing
let flag_db_names | null db_flags = env_stack
@@ -748,7 +756,7 @@ getPkgDatabases verbosity mode use_user use_cache expand_vars my_flags = do
-- stack, unless any of them are present in the stack
-- already.
let final_stack = filter (`notElem` env_stack)
- [ f | FlagConfig f <- reverse my_flags ]
+ [ unsafeEncodeUtf f | FlagConfig f <- reverse my_flags ]
++ env_stack
top_db = if null db_flags
@@ -764,7 +772,7 @@ getPkgDatabases verbosity mode use_user use_cache expand_vars my_flags = do
when (verbosity > Normal) $ do
infoLn ("db stack: " ++ show (map location db_stack))
F.forM_ db_to_operate_on $ \db ->
- infoLn ("modifying: " ++ (location db))
+ infoLn ("modifying: " ++ showOsPath (location db))
infoLn ("flag db stack: " ++ show (map location flag_db_stack))
return (db_stack, db_to_operate_on, flag_db_stack)
@@ -843,17 +851,19 @@ getPkgDatabases verbosity mode use_user use_cache expand_vars my_flags = do
return (db_stack, GhcPkg.DbOpenReadWrite to_modify)
where
- couldntOpenDbForModification :: FilePath -> IOError -> IO a
+ couldntOpenDbForModification :: OsPath -> IOError -> IO a
couldntOpenDbForModification db_path e = die $ "Couldn't open database "
- ++ db_path ++ " for modification: " ++ show e
+ ++ showOsPath db_path ++ " for modification: " ++ show e
-- Parse package db in read-only mode.
- readDatabase :: FilePath -> IO (PackageDB 'GhcPkg.DbReadOnly)
+ readDatabase :: OsPath -> IO (PackageDB 'GhcPkg.DbReadOnly)
readDatabase db_path = do
db <- readParseDatabase verbosity mb_user_conf
GhcPkg.DbOpenReadOnly use_cache db_path
if expand_vars
- then return $ mungePackageDBPaths top_dir db
+ then do
+ top_dir_filepath <- decodeFS top_dir
+ return $ mungePackageDBPaths top_dir_filepath db
else return db
stateSequence :: Monad m => s -> [s -> m (a, s)] -> m ([a], s)
@@ -863,20 +873,20 @@ getPkgDatabases verbosity mode use_user use_cache expand_vars my_flags = do
(as, s'') <- stateSequence s' ms
return (a : as, s'')
-lookForPackageDBIn :: FilePath -> IO (Maybe FilePath)
+lookForPackageDBIn :: OsPath -> IO (Maybe OsPath)
lookForPackageDBIn dir = do
- let path_dir = dir </> "package.conf.d"
+ let path_dir = dir </> os "package.conf.d"
exists_dir <- doesDirectoryExist path_dir
if exists_dir then return (Just path_dir) else do
- let path_file = dir </> "package.conf"
+ let path_file = dir </> os "package.conf"
exists_file <- doesFileExist path_file
if exists_file then return (Just path_file) else return Nothing
readParseDatabase :: forall mode t. Verbosity
- -> Maybe (FilePath,Bool)
+ -> Maybe (OsPath,Bool)
-> GhcPkg.DbOpenMode mode t
-> Bool -- use cache
- -> FilePath
+ -> OsPath
-> IO (PackageDB mode)
readParseDatabase verbosity mb_user_conf mode use_cache path
-- the user database (only) is allowed to be non-existent
@@ -898,7 +908,7 @@ readParseDatabase verbosity mb_user_conf mode use_cache path
Just db -> return db
Nothing ->
die $ "ghc no longer supports single-file style package "
- ++ "databases (" ++ path ++ ") use 'ghc-pkg init'"
+ ++ "databases (" ++ showOsPath path ++ ") use 'ghc-pkg init'"
++ "to create the database with the correct format."
| otherwise -> ioError err
@@ -914,7 +924,7 @@ readParseDatabase verbosity mb_user_conf mode use_cache path
-- It's fine if the cache is not there as long as the
-- database is empty.
when (not $ null confs) $ do
- warn ("WARNING: cache does not exist: " ++ cache)
+ warn ("WARNING: cache does not exist: " ++ showOsPath cache)
warn ("ghc will fail to read this package db. " ++
recacheAdvice)
else do
@@ -923,7 +933,7 @@ readParseDatabase verbosity mb_user_conf mode use_cache path
ignore_cache (const $ return ())
Right tcache -> do
when (verbosity >= Verbose) $ do
- warn ("Timestamp " ++ show tcache ++ " for " ++ cache)
+ warn ("Timestamp " ++ show tcache ++ " for " ++ showOsPath cache)
-- If any of the .conf files is newer than package.cache, we
-- assume that cache is out of date.
cache_outdated <- (`anyM` confs) $ \conf ->
@@ -931,12 +941,12 @@ readParseDatabase verbosity mb_user_conf mode use_cache path
if not cache_outdated
then do
when (verbosity > Normal) $
- infoLn ("using cache: " ++ cache)
+ infoLn ("using cache: " ++ showOsPath cache)
GhcPkg.readPackageDbForGhcPkg cache mode
>>= uncurry mkPackageDB
else do
whenReportCacheErrors $ do
- warn ("WARNING: cache is out of date: " ++ cache)
+ warn ("WARNING: cache is out of date: " ++ showOsPath cache)
warn ("ghc will see an old view of this " ++
"package db. " ++ recacheAdvice)
ignore_cache $ \file -> do
@@ -947,11 +957,11 @@ readParseDatabase verbosity mb_user_conf mode use_cache path
GT -> " (older than cache)"
EQ -> " (same as cache)"
warn ("Timestamp " ++ show tFile
- ++ " for " ++ file ++ rel)
+ ++ " for " ++ showOsPath file ++ rel)
where
- confs = map (path </>) $ filter (".conf" `isSuffixOf`) fs
+ confs = map (path </>) $ filter (os ".conf" `OsPath.isExtensionOf`) fs
- ignore_cache :: (FilePath -> IO ()) -> IO (PackageDB mode)
+ ignore_cache :: (OsPath -> IO ()) -> IO (PackageDB mode)
ignore_cache checkTime = do
-- If we're opening for modification, we need to acquire a
-- lock even if we don't open the cache now, because we are
@@ -987,17 +997,18 @@ readParseDatabase verbosity mb_user_conf mode use_cache path
packages = pkgs
}
-parseSingletonPackageConf :: Verbosity -> FilePath -> IO InstalledPackageInfo
+parseSingletonPackageConf :: Verbosity -> OsPath -> IO InstalledPackageInfo
parseSingletonPackageConf verbosity file = do
- when (verbosity > Normal) $ infoLn ("reading package config: " ++ file)
- BS.readFile file >>= fmap fst . parsePackageInfo
+ when (verbosity > Normal) $ infoLn ("reading package config: " ++ showOsPath file)
+ FileIO.readFile file >>= fmap fst . parsePackageInfo . BS.toStrict
+
-cachefilename :: FilePath
-cachefilename = "package.cache"
+cachefilename :: OsPath
+cachefilename = os "package.cache"
mungePackageDBPaths :: FilePath -> PackageDB mode -> PackageDB mode
mungePackageDBPaths top_dir db@PackageDB { packages = pkgs } =
- db { packages = map (mungePackagePaths top_dir pkgroot) pkgs }
+ db { packages = map (mungePackagePaths top_dir (unsafeDecodeUtf pkgroot)) pkgs }
where
pkgroot = takeDirectory $ dropTrailingPathSeparator (locationAbsolute db)
-- It so happens that for both styles of package db ("package.conf"
@@ -1044,12 +1055,13 @@ mkMungePathUrl top_dir pkgroot = (munge_path, munge_url)
| Just p' <- stripVarPrefix "$httptopdir" p = toUrlPath top_dir p'
| otherwise = p
+ toUrlPath :: FilePath -> FilePath -> FilePath
toUrlPath r p = "file:///"
-- URLs always use posix style '/' separators:
++ FilePath.Posix.joinPath
(r : -- We need to drop a leading "/" or "\\"
-- if there is one:
- dropWhile (all isPathSeparator)
+ dropWhile (all FilePath.isPathSeparator)
(FilePath.splitDirectories p))
-- We could drop the separator here, and then use </> above. However,
@@ -1057,7 +1069,7 @@ mkMungePathUrl top_dir pkgroot = (munge_path, munge_url)
-- rather than letting FilePath change it to use \ as the separator
stripVarPrefix var path = case stripPrefix var path of
Just [] -> Just []
- Just cs@(c : _) | isPathSeparator c -> Just cs
+ Just cs@(c : _) | FilePath.isPathSeparator c -> Just cs
_ -> Nothing
-- -----------------------------------------------------------------------------
@@ -1074,18 +1086,18 @@ mkMungePathUrl top_dir pkgroot = (munge_path, munge_url)
-- ghc itself also cooperates in this workaround
-tryReadParseOldFileStyleDatabase :: Verbosity -> Maybe (FilePath, Bool)
- -> GhcPkg.DbOpenMode mode t -> Bool -> FilePath
+tryReadParseOldFileStyleDatabase :: Verbosity -> Maybe (OsPath, Bool)
+ -> GhcPkg.DbOpenMode mode t -> Bool -> OsPath
-> IO (Maybe (PackageDB mode))
tryReadParseOldFileStyleDatabase verbosity mb_user_conf
mode use_cache path = do
-- assumes we've already established that path exists and is not a dir
- content <- readFile path `catchIO` \_ -> return ""
+ content <- readUtf8File path `catchIO` \_ -> return ""
if take 2 content == "[]"
then do
path_abs <- absolutePath path
let path_dir = adjustOldDatabasePath path
- warn $ "Warning: ignoring old file-style db and trying " ++ path_dir
+ warn $ "Warning: ignoring old file-style db and trying " ++ showOsPath path_dir
direxists <- doesDirectoryExist path_dir
if direxists
then do
@@ -1112,7 +1124,7 @@ tryReadParseOldFileStyleDatabase verbosity mb_user_conf
adjustOldFileStylePackageDB :: PackageDB mode -> IO (PackageDB mode)
adjustOldFileStylePackageDB db = do
-- assumes we have not yet established if it's an old style or not
- mcontent <- liftM Just (readFile (location db)) `catchIO` \_ -> return Nothing
+ mcontent <- liftM Just (readUtf8File (location db)) `catchIO` \_ -> return Nothing
case fmap (take 2) mcontent of
-- it is an old style and empty db, so look for a dir kind in location.d/
Just "[]" -> return db {
@@ -1121,20 +1133,20 @@ adjustOldFileStylePackageDB db = do
}
-- it is old style but not empty, we have to bail
Just _ -> die $ "ghc no longer supports single-file style package "
- ++ "databases (" ++ location db ++ ") use 'ghc-pkg init'"
+ ++ "databases (" ++ showOsPath (location db) ++ ") use 'ghc-pkg init'"
++ "to create the database with the correct format."
-- probably not old style, carry on as normal
Nothing -> return db
-adjustOldDatabasePath :: FilePath -> FilePath
-adjustOldDatabasePath = (<.> "d")
+adjustOldDatabasePath :: OsPath -> OsPath
+adjustOldDatabasePath = (<.> os "d")
-- -----------------------------------------------------------------------------
-- Creating a new package DB
-initPackageDB :: FilePath -> Verbosity -> [Flag] -> IO ()
+initPackageDB :: OsPath -> Verbosity -> [Flag] -> IO ()
initPackageDB filename verbosity _flags = do
- let eexist = die ("cannot create: " ++ filename ++ " already exists")
+ let eexist = die ("cannot create: " ++ showOsPath filename ++ " already exists")
b1 <- doesFileExist filename
when b1 eexist
b2 <- doesDirectoryExist filename
@@ -1183,7 +1195,8 @@ registerPackage input verbosity my_flags multi_instance
f -> do
when (verbosity >= Normal) $
info ("Reading package info from " ++ show f ++ " ... ")
- readUTF8File f
+ fs <- encodeFS f
+ readUtf8File fs
expanded <- if expand_env_vars then expandEnvVars s force
else return s
@@ -1199,7 +1212,11 @@ registerPackage input verbosity my_flags multi_instance
-- validate the expanded pkg, but register the unexpanded
pkgroot <- absolutePath (takeDirectory to_modify)
let top_dir = takeDirectory (location (last db_stack))
- pkg_expanded = mungePackagePaths top_dir pkgroot pkg
+
+ top_dir_filepath <- decodeFS top_dir
+ pkgroot_filepath <- decodeFS pkgroot
+ let
+ pkg_expanded = mungePackagePaths top_dir_filepath pkgroot_filepath pkg
let truncated_stack = stackUpTo to_modify db_stack
-- truncate the stack for validation, because we don't allow
@@ -1274,13 +1291,13 @@ changeDBDir verbosity cmds db db_stack = do
updateDBCache verbosity db db_stack
where
do_cmd (RemovePackage p) = do
- let file = location db </> display (installedUnitId p) <.> "conf"
- when (verbosity > Normal) $ infoLn ("removing " ++ file)
+ let file = location db </> unsafeEncodeUtf (display (installedUnitId p)) <.> os "conf"
+ when (verbosity > Normal) $ infoLn ("removing " ++ showOsPath file)
removeFileSafe file
do_cmd (AddPackage p) = do
- let file = location db </> display (installedUnitId p) <.> "conf"
- when (verbosity > Normal) $ infoLn ("writing " ++ file)
- writeUTF8File file (showInstalledPackageInfo p)
+ let file = location db </> unsafeEncodeUtf (display (installedUnitId p)) <.> os "conf"
+ when (verbosity > Normal) $ infoLn ("writing " ++ showOsPath file)
+ writeUtf8File file (showInstalledPackageInfo p)
do_cmd (ModifyPackage p) =
do_cmd (AddPackage p)
@@ -1338,13 +1355,13 @@ updateDBCache verbosity db db_stack = do
warn $ " " ++ pkg
when (verbosity > Normal) $
- infoLn ("writing cache " ++ filename)
+ infoLn ("writing cache " ++ showOsPath filename)
let d = fmap (fromPackageCacheFormat . fst) pkgsGhcCacheFormat
GhcPkg.writePackageDb filename d pkgsCabalFormat
`catchIO` \e ->
if isPermissionError e
- then die $ filename ++ ": you don't have permission to modify this file"
+ then die $ showOsPath filename ++ ": you don't have permission to modify this file"
else ioError e
case packageDbLock db of
@@ -1583,7 +1600,7 @@ listPackages verbosity my_flags mPackageName mModuleName = do
broken = map installedUnitId (brokenPackages pkg_map)
show_normal PackageDB{ location = db_name, packages = pkg_confs } =
- do hPutStrLn stdout db_name
+ do hPutStrLn stdout (showOsPath db_name)
if null pkg_confs
then hPutStrLn stdout " (no packages)"
else hPutStrLn stdout $ unlines (map (" " ++) (map pp_pkg pkg_confs))
@@ -1610,7 +1627,7 @@ listPackages verbosity my_flags mPackageName mModuleName = do
#else
let
show_colour PackageDB{ location = db_name, packages = pkg_confs } =
- do hPutStrLn stdout db_name
+ do hPutStrLn stdout (showOsPath db_name)
if null pkg_confs
then hPutStrLn stdout " (no packages)"
else hPutStrLn stdout $ unlines (map (" " ++) (map pp_pkg pkg_confs))
@@ -1698,7 +1715,7 @@ dumpUnits verbosity my_flags expand_pkgroot = do
doDump expand_pkgroot [ (pkg, locationAbsolute db)
| db <- flag_db_stack, pkg <- packages db ]
-doDump :: Bool -> [(InstalledPackageInfo, FilePath)] -> IO ()
+doDump :: Bool -> [(InstalledPackageInfo, OsPath)] -> IO ()
doDump expand_pkgroot pkgs = do
-- fix the encoding to UTF-8, since this is an interchange format
hSetEncoding stdout utf8
@@ -1731,7 +1748,7 @@ findPackagesByDB db_stack pkgarg
cannotFindPackage :: PackageArg -> Maybe (PackageDB mode) -> IO a
cannotFindPackage pkgarg mdb = die $ "cannot find package " ++ pkg_msg pkgarg
- ++ maybe "" (\db -> " in " ++ location db) mdb
+ ++ maybe "" (\db -> " in " ++ showOsPath (location db)) mdb
where
pkg_msg (Id pkgid) = displayGlobPkgId pkgid
pkg_msg (IUId ipid) = display ipid
@@ -1944,7 +1961,7 @@ checkPackageConfig pkg verbosity db_stack
checkExposedModules db_stack pkg
checkOtherModules pkg
let has_code = Set.null (openModuleSubstFreeHoles (Map.fromList (instantiatedWith pkg)))
- when has_code $ mapM_ (checkHSLib verbosity (libraryDirs pkg ++ libraryDynDirs pkg)) (hsLibraries pkg)
+ when has_code $ mapM_ (checkHSLib verbosity (fmap unsafeEncodeUtf $ libraryDirs pkg ++ libraryDynDirs pkg)) (hsLibraries pkg)
-- ToDo: check these somehow?
-- extra_libraries :: [String],
-- c_includes :: [String],
@@ -2011,20 +2028,20 @@ checkPath url_ok is_dir warn_only thisfield d
|| "https://" `isPrefixOf` d) = return ()
| url_ok
- , Just d' <- stripPrefix "file://" d
- = checkPath False is_dir warn_only thisfield d'
+ , Just f <- stripPrefix "file://" d
+ = checkPath False is_dir warn_only thisfield f
-- Note: we don't check for $topdir/${pkgroot} here. We rely on these
-- variables having been expanded already, see mungePackagePaths.
- | isRelative d = verror ForceFiles $
+ | isRelative d' = verror ForceFiles $
thisfield ++ ": " ++ d ++ " is a relative path which "
++ "makes no sense (as there is nothing for it to be "
++ "relative to). You can make paths relative to the "
++ "package database itself by using ${pkgroot}."
-- relative paths don't make any sense; #4134
| otherwise = do
- there <- liftIO $ if is_dir then doesDirectoryExist d else doesFileExist d
+ there <- liftIO $ if is_dir then doesDirectoryExist d' else doesFileExist d'
when (not there) $
let msg = thisfield ++ ": " ++ d ++ " doesn't exist or isn't a "
++ if is_dir then "directory" else "file"
@@ -2032,6 +2049,8 @@ checkPath url_ok is_dir warn_only thisfield d
if warn_only
then vwarn msg
else verror ForceFiles msg
+ where
+ d' = unsafeEncodeUtf d
checkDep :: PackageDBStack -> UnitId -> Validate ()
checkDep db_stack pkgid
@@ -2050,24 +2069,25 @@ checkDuplicateDepends deps
where
dups = [ p | (p:_:_) <- group (sort deps) ]
-checkHSLib :: Verbosity -> [String] -> String -> Validate ()
+checkHSLib :: Verbosity -> [OsPath] -> String -> Validate ()
checkHSLib _verbosity dirs lib = do
- let filenames = ["lib" ++ lib ++ ".a",
- "lib" ++ lib ++ "_p.a",
- "lib" ++ lib ++ "-ghc" ++ GHC.Version.cProjectVersion ++ ".so",
- "lib" ++ lib ++ "_p" ++ "-ghc" ++ GHC.Version.cProjectVersion ++ ".so",
- "lib" ++ lib ++ "-ghc" ++ GHC.Version.cProjectVersion ++ ".dylib",
- "lib" ++ lib ++ "_p" ++ "-ghc" ++ GHC.Version.cProjectVersion ++ ".dylib",
- lib ++ "-ghc" ++ GHC.Version.cProjectVersion ++ ".dll",
- lib ++ "_p" ++ "-ghc" ++ GHC.Version.cProjectVersion ++ ".dll",
- lib ++ ".bytecodelib"
- ]
+ let filenames = fmap OsPath.unsafeEncodeUtf
+ [ "lib" ++ lib ++ ".a"
+ , "lib" ++ lib ++ "_p.a"
+ , "lib" ++ lib ++ "-ghc" ++ GHC.Version.cProjectVersion ++ ".so"
+ , "lib" ++ lib ++ "_p" ++ "-ghc" ++ GHC.Version.cProjectVersion ++ ".so"
+ , "lib" ++ lib ++ "-ghc" ++ GHC.Version.cProjectVersion ++ ".dylib"
+ , "lib" ++ lib ++ "_p" ++ "-ghc" ++ GHC.Version.cProjectVersion ++ ".dylib"
+ , lib ++ "-ghc" ++ GHC.Version.cProjectVersion ++ ".dll"
+ , lib ++ "_p" ++ "-ghc" ++ GHC.Version.cProjectVersion ++ ".dll"
+ , lib ++ ".bytecodelib"
+ ]
b <- liftIO $ doesFileExistOnPath filenames dirs
when (not b) $
verror ForceFiles ("cannot find any of " ++ show filenames ++
" on library path")
-doesFileExistOnPath :: [FilePath] -> [FilePath] -> IO Bool
+doesFileExistOnPath :: [OsPath] -> [OsPath] -> IO Bool
doesFileExistOnPath filenames paths = anyM doesFileExist fullFilenames
where fullFilenames = [ path </> filename
| filename <- filenames
@@ -2096,9 +2116,9 @@ checkModuleFile :: InstalledPackageInfo -> ModuleName -> Validate ()
checkModuleFile pkg modl =
-- there's no interface file for GHC.Prim
unless (modl == ModuleName.fromString "GHC.Prim") $ do
- let files = [ ModuleName.toFilePath modl <.> extension
- | extension <- ["hi", "p_hi", "dyn_hi", "p_dyn_hi"] ]
- b <- liftIO $ doesFileExistOnPath files (importDirs pkg)
+ let files = [ unsafeEncodeUtf (ModuleName.toFilePath modl) <.> extension
+ | extension <- fmap os ["hi", "p_hi", "dyn_hi", "p_dyn_hi"] ]
+ b <- liftIO $ doesFileExistOnPath files (fmap unsafeEncodeUtf $ importDirs pkg)
when (not b) $
verror ForceFiles ("cannot find any of " ++ show files)
@@ -2273,19 +2293,45 @@ installSignalHandlers = do
return ()
#endif
+-- ------------------------------------------------
+-- OsPath Utils
+
+-- | Show an 'OsPath', throwing an exception if we fail to decode it.
+showOsPath :: HasCallStack => OsPath -> FilePath
+showOsPath = unsafePerformIO . decodeFS
+
+-- | Turn a path relative to the current directory into a (normalised)
+-- absolute path.
+absolutePath :: OsPath -> IO OsPath
+absolutePath path = return . normalise . (</> path) =<< getCurrentDirectory
+
+-- ------------------------------------------------
+
catchIO :: IO a -> (Exception.IOException -> IO a) -> IO a
catchIO = catchException
tryIO :: IO a -> IO (Either Exception.IOException a)
tryIO = Exception.try
--- removeFileSave doesn't throw an exceptions, if the file is already deleted
-removeFileSafe :: FilePath -> IO ()
+-----------------------------------------
+-- Adapted from ghc/compiler/utils/Panic
+
+-- | 'removeFileSave' doesn't throw an exceptions, if the file is already deleted
+removeFileSafe :: OsPath -> IO ()
removeFileSafe fn =
removeFile fn `catchIO` \ e ->
when (not $ isDoesNotExistError e) $ ioError e
--- | Turn a path relative to the current directory into a (normalised)
--- absolute path.
-absolutePath :: FilePath -> IO FilePath
-absolutePath path = return . normalise . (</> path) =<< getCurrentDirectory
+-- | Read a file using UTF-8 encoding
+--
+-- Taken from https://github.com/haskell/cabal/blob/cea1d8ff1a80df3c3b3148d1556bd3edf656d…
+-- and adapted to 'OsPath'.
+writeUtf8File :: OsPath -> String -> IO ()
+writeUtf8File file contents = writeFileAtomic file (toUTF8LBS contents)
+
+-- | Read a file and interpret its content to be UTF-8 encoded.
+--
+-- Taken from https://github.com/haskell/cabal/blob/cea1d8ff1a80df3c3b3148d1556bd3edf656d…
+-- and adapted to 'OsPath'.
+readUtf8File :: OsPath -> IO String
+readUtf8File file = (ignoreBOM . fromUTF8LBS) <$> FileIO.readFile file
=====================================
utils/ghc-pkg/ghc-pkg.cabal.in
=====================================
@@ -25,6 +25,7 @@ Executable ghc-pkg
process >= 1 && < 1.7,
containers,
filepath,
+ file-io,
Cabal,
Cabal-syntax,
binary,
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/0a42990e58caaa42c2396c2a9dd6ce4…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/0a42990e58caaa42c2396c2a9dd6ce4…
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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 5 commits: Simplify mkTick
by Marge Bot (＠marge-bot) 16 Apr '26
by Marge Bot (＠marge-bot) 16 Apr '26
16 Apr '26
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
92547827 by sheaf at 2026-04-16T05:24:49-04:00
Simplify mkTick
This commit simplifies 'GHC.Core.Utils.mkTick', removing the
accumulating parameter 'rest' which was suspiciously treating a bunch of
different ticks as a group, and moving the group as a whole around the
AST, ignoring that the ticks in the group might have different placement
properties.
The most important change is that we revert the logic (added in 85b0aae2)
that allowed ticks to be placed around coercions, which caused serious
issues (e.g. #27121). It was just a mistake, as it doesn't make sense
to put a tick around a coercion.
Also adds Note [Pushing SCCs inwards] which clarifies the logic for
pushing SCCs into lambdas, constructor applications, and dropping SCCs
around non-function variables (in particular the treatment of splittable
ticks).
A few other changes are also implemented:
- simplify 'can_split' predicate (no functional change)
- combine profiling ticks into one when possible
Fixes #26878, #26941 and #27121
Co-authored-by: simonpj <simon.peytonjones(a)gmail.com>
- - - - -
98a7316b by aparker at 2026-04-16T05:24:53-04:00
NCG: Implement constant folding for vector simd ops (Issue #25030)
- - - - -
2b391bc0 by Simon Jakobi at 2026-04-16T05:24:55-04:00
Add regression test for #9074
Closes #9074.
- - - - -
cb70a24d by Sylvain Henry at 2026-04-16T05:25:03-04:00
Add changelog for #15973
- - - - -
c32a5ea4 by sheaf at 2026-04-16T05:25:08-04:00
Deal with 'noSpec' in 'coreExprToPmLit'
This commit makes two separate changes relating to
'GHC.HsToCore.Pmc.Solver.Types.coreExprAsPmLit':
1. Commit 7124e4ad mistakenly marked deferred errors as non-canonical,
which led to the introduction of 'nospec' wrappers in the
generated Core. This reverts that accident by declaring deferred
errors as being canonical, avoiding spurious 'nospec' wrapping.
2. Look through magic identity-like Ids such as 'nospec', 'inline' and
'lazy' in 'coreExprAsPmLit', just like Core Prep does.
There might genuinely be incoherent evidence, but that shouldn't
obstruct the pattern match checker. See test T27124a.
Fixes #25926 #27124
-------------------------
Metric Decrease:
T3294
-------------------------
- - - - -
37 changed files:
- + changelog.d/T15973
- + changelog.d/T27121.md
- + changelog.d/T27124.md
- + changelog.d/simd_constant_folding
- compiler/GHC/Cmm/Opt.hs
- compiler/GHC/Core/Opt/FloatOut.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/Stg/Debug.hs
- compiler/GHC/Tc/Errors.hs
- compiler/GHC/Types/Tickish.hs
- compiler/GHC/Utils/Misc.hs
- libraries/ghc-heap/tests/tso_and_stack_closures.hs
- + testsuite/tests/ghci/T9074/Makefile
- + testsuite/tests/ghci/T9074/T9074.hs
- + testsuite/tests/ghci/T9074/T9074.stdout
- + testsuite/tests/ghci/T9074/T9074a.c
- + testsuite/tests/ghci/T9074/T9074b.c
- + testsuite/tests/ghci/T9074/all.T
- + testsuite/tests/overloadedstrings/should_fail/T25926.hs
- + testsuite/tests/overloadedstrings/should_fail/T25926.stderr
- + testsuite/tests/overloadedstrings/should_fail/T27124.hs
- + testsuite/tests/overloadedstrings/should_fail/T27124.stderr
- + testsuite/tests/overloadedstrings/should_fail/all.T
- + testsuite/tests/overloadedstrings/should_run/T27124a.hs
- testsuite/tests/overloadedstrings/should_run/all.T
- + testsuite/tests/profiling/should_compile/T27121.hs
- + testsuite/tests/profiling/should_compile/T27121_aux.hs
- testsuite/tests/profiling/should_compile/all.T
- + testsuite/tests/simd/should_run/Makefile
- + testsuite/tests/simd/should_run/T25030.hs
- + testsuite/tests/simd/should_run/T25030.stdout
- testsuite/tests/simd/should_run/all.T
- + testsuite/tests/simplCore/should_compile/T26941.hs
- + testsuite/tests/simplCore/should_compile/T26941_aux.hs
- testsuite/tests/simplCore/should_compile/all.T
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/41fb8dd43464fa998c8d91598c196e…
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[Git][ghc/ghc][wip/27162/hadrian-linkhs-response-file] 88 commits: Fix assert in Interpreter.c
by David Eichmann (＠DavidEichmann) 16 Apr '26
by David Eichmann (＠DavidEichmann) 16 Apr '26
16 Apr '26
David Eichmann pushed to branch wip/27162/hadrian-linkhs-response-file at Glasgow Haskell Compiler / GHC
Commits:
404b71c1 by Luite Stegeman at 2026-03-27T04:40:49-04:00
Fix assert in Interpreter.c
If we skip exactly the number of words on the stack we end up on
the first word in the next chunk.
- - - - -
a85bd503 by Luite Stegeman at 2026-03-27T04:40:49-04:00
Support arbitrary size unboxed tuples in bytecode
This stores the size (number of words on the stack) of the next
expected tuple in the TSO, ctoi_spill_size field, eliminating
the need of stg_ctoi_tN frames for each size.
Note: On 32 bit platform there is still a bytecode tuple size
limit of 255 words on the stack.
Fixes #26946
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e2209031 by Luite Stegeman at 2026-03-27T04:40:49-04:00
Add specialized frames for small tuples
Small tuples are now returned more efficiently to the interpreter.
They use one less word of stack space and don't need manipulation
of the TSO anymore.
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b26bb2ea by VeryMilkyJoe at 2026-03-27T04:41:38-04:00
Remove backwards compatibility pattern synonym `ModLocation`
Fixes #24932
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66e5e324 by Vladislav Zavialov at 2026-03-27T04:42:25-04:00
Extend HsExpr with the StarIsType syntax (#26587, #26967)
This patch allows kinds of the form `k -> *` and `* -> k` to occur in
expression syntax, i.e. to be used as required type arguments.
For example:
{-# LANGUAGE RequiredTypeArguments, StarIsType #-}
x1 = f (* -> * -> *)
x2 = f (forall k. k -> *)
x3 = f ((* -> *) -> Constraint)
Summary of the changes:
* Introduce the HsStar constructor of HsExpr and its extension field XStar.
It is analogous to HsStarTy in HsType.
* Refactor HsStarTy to store the unicode flag as TokStar, defined as
type TokStar = EpUniToken "*" "★" -- similar to TokForall, TokRArrow, etc.
The token is stored in the extension field and replaces the Bool field.
* Extend the `infixexp2` nonterminal to parse `*` as a direct argument of `->`.
This is more limited than the full StarIsType syntax, but has the nice
property of not conflicting with the multiplication operator `a * b`.
Test case: T26967 T26967_tyop
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f8de456f by Sylvain Henry at 2026-03-27T04:43:22-04:00
STM: don't create a transaction in the rhs of catchRetry# (#26028)
We don't need to create a transaction for the rhs of (catchRetry#)
because contrary to the lhs we don't need to abort it on retry. Moreover
it is particularly harmful if we have code such as (#26028):
let cN = readTVar vN >> retry
tree = c1 `orElse` (c2 `orElse` (c3 `orElse` ...))
atomically tree
Because it will stack transactions for the rhss and the read-sets of all
the transactions will be iteratively merged in O(n^2) after the
execution of the most nested retry.
This is the second attempt at implementing this. The first attempt
triggered segfaults (#26291) and has been reverted.
Co-Authored-By: Claude Sonnet 4.6 <noreply(a)anthropic.com>
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fcf092dd by Luite Stegeman at 2026-03-27T04:44:17-04:00
Windows: remove StgAsyncIOResult and fix crash/leaks
In stg_block_async{_void}, a stack slot was reserved for
an StgAsyncIOResult. This slot would be filled by the IO
manager upon completion of the async call.
However, if the blocked thread was interrupted by an async
exception, we would end up in an invalid state:
- If the blocked computation was never re-entered, the
StgAsyncIOResult would never be freed.
- If the blocked computation was re-entered, the thread would
find an unitialized stack slot for the StgAsyncIOResult,
leading to a crash reading its fields, or freeing the pointer.
We fix this by removing the StgAsyncIOResult altogether and writing
the result directly to the stack.
Fixes #26341
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05094993 by Luite Stegeman at 2026-03-27T04:45:12-04:00
Don't refine DEFAULT alt for unary typeclasses
A non-DEFAULT data alt for a unary typeclass dictionary would
interfere with Unary Class Magic, leading to segfaults.
fixes #27071
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4ee260cf by sheaf at 2026-03-27T04:46:06-04:00
Fix several oversights in hsExprType
This commit fixes several oversights in GHC.Hs.Syn.Type.hsExprType:
- The 'RecordCon' case was returning the type of the constructor,
instead of the constructor application. This is fixed by using
'splitFunTys'.
- The 'ExplicitTuple' case failed to take into account tuple sections,
and was also incorrectly handling 1-tuples (e.g. 'Solo') which can
be constructed using Template Haskell.
- The 'NegApp' case was returning the type of the negation operator,
again failing to apply it to the argument. Fixed by using
'funResultTy'.
- The 'HsProc' case was computing the result type of the arrow proc
block, without taking into account the argument type. Fix that by
adding a new field to 'CmdTopTc' that stores the arrow type, so that
we can construct the correct result type `arr a b` for
`proc (pat :: a) -> (cmd :: b)`.
- The 'ArithSeq' and 'NegApp' cases were failing to take into account
the result 'HsWrapper', which could e.g. silently drop casts.
This is fixed by introducing 'syntaxExpr_wrappedFunResTy' which, on
top of taking the result type, applies the result 'HsWrapper'.
These fixes are validated by the new GHC API test T26910.
Fixes #26910
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e97232ce by Hai at 2026-03-27T04:47:04-04:00
Parser.y: avoid looking at token with QualifiedDo
This changes the behavior of 'hintQualifiedDo' so that the supplied
token is not inspected when the QualifiedDo language extension bit is
set.
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9831385b by Vladislav Zavialov at 2026-03-27T17:22:30-04:00
Infix holes in types (#11107)
This patch introduces several improvements that follow naturally from
refactoring HsOpTy to represent the operator as an HsType, aligning it
with the approach taken by OpApp and HsExpr.
User-facing changes:
1. Infix holes (t1 `_` t2) are now permitted in types, following the
precedent set by term-level expressions.
Test case: T11107
2. Error messages for illegal promotion ticks are now reported at more
precise source locations.
Test case: T17865
Internal changes:
* The definition of HsOpTy now mirrors that of OpApp:
| HsOpTy (XOpTy p) (LHsType p) (LHsType p) (LHsType p)
| OpApp (XOpApp p) (LHsExpr p) (LHsExpr p) (LHsExpr p)
This moves us one step closer to unifying HsType and HsExpr.
* Ignoring locations,
the old pattern match (HsOpTy x prom lhs op rhs)
is now written as (HsOpTy x lhs (HsTyVar x' prom op) rhs)
but we also handle (HsOpTy x lhs (HsWildCardTy x') rhs)
Constructors other than HsTyVar and HsWildCardTy never appear
in the operator position.
* The various definitions across the compiler have been updated to work
with the new representation, drawing inspiration from the term-level
pipeline where appropriate. For example,
ppr_infix_ty <=> ppr_infix_expr
get_tyop <=> get_op
lookupTypeFixityRn <=> lookupExprFixityRn
(the latter is factored out from rnExpr)
Test cases: T11107 T17865
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5b6757d7 by mangoiv at 2026-03-27T17:23:19-04:00
ci: build i386 non-validate for deb12
This is a small fix that will unlock ghcup metadata to run, i386 debian
12 was missing as a job.
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cf942119 by Cheng Shao at 2026-03-30T15:24:37-04:00
ghc-boot: remove unused SizedSeq instances and functions
This commit removes unused `SizedSeq` instances and functions, only
keeping the bits we need for hpc tick sequence for now.
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22c5b7cc by Cheng Shao at 2026-03-30T15:24:38-04:00
ghci: remove unused GHCi.BinaryArray
This patch removes the unused `GHCi.BinaryArray` module from `ghci`.
Closes #27108.
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77abb4ab by Cheng Shao at 2026-03-30T15:25:21-04:00
testsuite: mark T17912 as fragile on Windows
T17912 is still fragile on Windows, it sometimes unexpectedly pass in
CI. This especially strains our already scarce Windows CI runner
resources. Mark it as fragile on Windows for the time being.
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d741a6cc by Andreas Klebinger at 2026-03-31T04:39:33-04:00
Bump minimum shake version for hadrian.
We also add the shake version we want to stack.yaml
Fixes #26884
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5e556f9e by Vladislav Zavialov at 2026-03-31T04:40:16-04:00
Status check for the HsType~HsExpr refactoring (#25121)
Add a test case to track the status of a refactoring project within GHC
whose goal is to arrive at the following declaration:
type HsType = HsExpr
The rationale for this is to increase code reuse between the term- and
type-level code in the compiler front-end (AST, parser, renamer, type checker).
The status report is saved to testsuite/tests/ghc-api/T25121_status.stdout
and provides useful insights into what needs to happen to make progress on
the ticket.
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acffb1b1 by fendor at 2026-03-31T04:41:02-04:00
Extract Binary instances to `GHC.ByteCode.Binary`
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e2ea8e25 by fendor at 2026-03-31T04:41:02-04:00
Add `seqNonEmpty` for evaluating `NonEmpty a`
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048b00b7 by fendor at 2026-03-31T04:41:02-04:00
Record `LinkableUsage` instead of `Linkable` in `LoaderState`
Retaining a ByteCode `Linkable` after it has been loaded retains its
`UnlinkedBCO`, keeping it alive for the remainder of the program.
This starts accumulating a lot of `UnlinkedBCO` and memory over time.
However, the `Linkable` is merely used to later record its usage in
`mkObjectUsage`, which is used for recompilation checking.
However, this is incorrect, as the interface file and bytecode objects
could be in different states, e.g. the interface changes, but the
bytecode library hasn't changed so we don't need to recompile and vice
versa.
By computing a `Fingerprint` for the `ModuleByteCode`, and recording it
in the `LinkableUsage`, we know precisely whether the `ByteCode` object
on disk is outdated.
Thus, parts of this commit just makes sure that we efficiently compute a
`Fingerprint` for `ModuleByteCode` and store it in the on-disk
representation of `ModuleByteCode`.
We change the `LoaderState` to retain `LinkableUsage`, which is smaller
representation of a `Linkable`. This allows us to free the unneeded
fields of `Linkable` after linking them.
We declare the following memory invariants that this commit implements:
* No `LinkablePart` should be retained from `LoaderState`.
* `Linkable`s should be unloaded after they have been loaded.
These invariants are unfortunately tricky to automatically uphold, so we
are simply documenting our assumptions for now.
We introduce the `linkable-space` test which makes sure that after
loading, no `DotGBC` or `UnlinkedBCO` is retained.
-------------------------
Metric Increase:
MultiLayerModulesTH_OneShot
-------------------------
We allocate a bit more, but the peak number of bytes doesn't change.
While a bit unfortunate, accepting the metric increase.
We add multiple new performance measurements where we were able to
observe the desired memory invariants. Further, we add regression tests
to validate that the recompilation checker behaves more correct than
before.
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2d1c1997 by Simon Jakobi at 2026-03-31T04:41:46-04:00
Eliminate dictionary-passing in ListMap operations
Mark the ListMap helpers 'INLINABLE' so importing modules can specialise
the 'TrieMap (ListMap m)' methods and avoid recursive dictionary-passing.
See Note [Making ListMap operations specialisable].
Fixes #27097
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ed2c6570 by Cheng Shao at 2026-03-31T04:42:33-04:00
testsuite: fix testdir cleanup logic on Windows
testdir cleanup is unreliable on Windows (#13162) and despite existing
hacks in the driver, new failure mode has occurred. This patch makes
it print the warning and carry on when failed to clean up a testdir,
instead of reporting a spurious framework failure. See added comment
for detailed explanation.
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d9388e29 by Simon Jakobi at 2026-03-31T13:14:59-04:00
Add regression test for #18177
Closes #18177.
Assisted-by: Codex
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6a10045c by mangoiv at 2026-03-31T13:15:43-04:00
ci: allow metric decrease for two tests on i386
There has been a nightly failure on i386 due to a compiler runtime
improvement on i386 debian 12. We allow that.
Metric Decrease (test_env='i386-linux-deb12'):
T12707 T8095
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7fbb4fcb by Rodrigo Mesquita at 2026-04-01T12:16:33+00:00
Bump default language edition to GHC2024
As per the accepted ghc-proposal#632
Fixes #26039
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5ae43275 by Peng Fan at 2026-04-01T19:01:06-04:00
NCG/LA64: add cmpxchg and xchg primops
And append some new instructions for LA664 uarch.
Apply fix to cmpxchg-prim by Andreas Klebinger.
Suggestions in https://gitlab.haskell.org/ghc/ghc/-/merge_requests/15515
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8f95534a by Duncan Coutts at 2026-04-01T19:01:52-04:00
Remove signal-based ticker implementations
Fixes issue #27073
All supported platforms should work with the pthreads + nanosleep based
ticker implementation. This avoids all the problems with using signals.
In practice, all supported platforms were probably using the non-signal
tickers already, which is probably why we do not get lots of reports
about deadlocks and other weirdness: we were definately using functions
that are not async signal safe in the tick handler (such as fflush to
flussh the eventlog).
Only Solaris was explicitly using the timer_create ticker impl, and even
Solaris could probably use the pthreads one (if anyone cared: Solaris is
no longer a Teir 3 supported platform).
Plausibly the only supported platform that this will change will be AIX,
which should now use the pthreads impl.
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51b32b0d by Duncan Coutts at 2026-04-01T19:01:52-04:00
Tidy up some timer/ticker comments elsewhere
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7562bcd7 by Duncan Coutts at 2026-04-01T19:01:52-04:00
Remove now-unused install_vtalrm_handler
Support function used by both of the signal-based ticker
implementations.
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6da127c7 by Duncan Coutts at 2026-04-01T19:01:52-04:00
No longer probe for timer_create in rts/configure
It was only used by the TimerCreate.c ticker impl.
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3fd490fa by Duncan Coutts at 2026-04-01T19:01:53-04:00
Note that rtsTimerSignal is deprecated.
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63099b0f by Simon Jakobi at 2026-04-01T19:02:39-04:00
Add perf test for #13960
Closes #13960.
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58009c14 by Apoorv Ingle at 2026-04-02T09:51:24+01:00
Streamline expansions using HsExpansion (#25001)
Notes added [Error Context Stack] [Typechecking by expansion: overview]
Notes updated Note [Expanding HsDo with XXExprGhcRn] [tcApp: typechecking applications]
-------------------------
Metric Decrease:
T9020
-------------------------
There are 2 key changes:
1. `HsExpand` datatype mediates between expansions
2. Replace `ErrCtxtM` to a simpler `HsCtxt` that does not depend on a `TidyEnv`
This has some consequences detailed below:
1. `HsExpand` datatype mediates between expansions
* Simplifies the implementations of `tcExpr` to work on `XExpr`
* Removes `VACtxt` (and its associated `VAExpansion` and `VACall`) datatype, it is subsumed by simply a `SrcSpan`.
* Removes the function `addHeadCtxt` as it is now mearly setting a location
* The function `tcValArgs` does its own argument number management
* move `splitHsTypes` out of `tcApp`
* Removes special case of tcBody from `tcLambdaMatches`
* Removes special case of `dsExpr` for `ExpandedThingTc`
* Renames `tcMonoExpr` -> `tcMonoLExpr`, `tcMonoExprNC` -> `tcMonoLExpr`
* Renames `EValArg`, `EValArgQL` fields: `ea_ctxt` -> `ea_loc_span` and `eaql_ctx` -> `eaql_loc_span`
* Remove `PopErrCtxt` from `XXExprGhcRn`
* `fun_orig` in tcInstFun depends on the SrcSpan of the head of the application chain (similar to addArgCtxt)
- it references the application chain head if it is user located, or
uses the error context stack as a fallback if it's a generated
location
* Make a new variant `GeneratedSrcSpan` in `SrcSpan` for HIEAst Nodes
- Expressions wrapped around `GeneratedSrcSpan` are ignored and never added to the error context stack
- In Explicit list expansion `fromListN` is wrapped with a `GeneratedSrcSpan` with `GeneratedSrcSpanDetails` field to store the original srcspan
2. Replace `ErrCtxtM` to a simpler `HsCtxt` that does not depend on a `TidyEnv`
* Merge `HsThingRn` to `HsCtxt`
* Landmark Error messages are now just computed on the fly
* Make HsExpandedRn and HsExpandedTc payload a located HsExpr GhcRn
* `HsCtxt` are tidied and zonked at the end right before printing
Co-authored-by: simonpj <simon.peytonjones(a)gmail.com>
- - - - -
bc4b4487 by Zubin Duggal at 2026-04-03T14:22:27-04:00
driver: recognise .dyn_o as a valid object file to link if passed on the command line.
This allows plugins compiled with this suffix to run.
Fixes #24486
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5ebb9121 by Simon Jakobi at 2026-04-03T14:23:11-04:00
Add regression test for #16145
Closes #16145.
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c1fc1c44 by Simon Peyton Jones at 2026-04-03T19:56:07-04:00
Refactor eta-expansion in Prep
The Prep pass does eta-expansion but I found cases where it was
doing bad things. So I refactored and simplified it quite a bit.
In the new design
* There is no distinction between `rhs` and `body`; in particular,
lambdas can now appear anywhere, rather than just as the RHS of
a let-binding.
* This change led to a significant simplification of Prep, and
a more straightforward explanation of eta-expansion. See the new
Note [Eta expansion]
* The consequences is that CoreToStg needs to handle naked lambdas.
This is very easy; but it does need a unique supply, which forces
some simple refactoring. Having a unique supply to hand is probably
a good thing anyway.
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21beda2c by Simon Peyton Jones at 2026-04-03T19:56:07-04:00
Clarify Note [Interesting dictionary arguments]
Ticket #26831 ended up concluding that the code for
GHC.Core.Opt.Specialise.interestingDict was good, but the
commments were a bit inadequate.
This commit improves the comments slightly.
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3eaac1f2 by Simon Peyton Jones at 2026-04-03T19:56:07-04:00
Make inlining a bit more eager for overloaded functions
If we have
f d = ... (class-op d x y) ...
we should be eager to inline `f`, because that may change the
higher order call (class-op d x y) into a call to a statically
known function.
See the discussion on #26831.
Even though this does a bit /more/ inlining, compile times
decrease by an average of 0.4%.
Compile time changes:
DsIncompleteRecSel3(normal) 431,786,104 -2.2%
ManyAlternatives(normal) 670,883,768 -1.6%
ManyConstructors(normal) 3,758,493,832 -2.6% GOOD
MultilineStringsPerf(normal) 29,900,576 -2.8%
T14052Type(ghci) 1,047,600,848 -1.2%
T17836(normal) 392,852,328 -5.2%
T18478(normal) 442,785,768 -1.4%
T21839c(normal) 341,536,992 -14.1% GOOD
T3064(normal) 174,086,152 +5.3% BAD
T5631(normal) 506,867,800 +1.0%
hard_hole_fits(normal) 209,530,736 -1.3%
info_table_map_perf(normal) 19,523,093,184 -1.2%
parsing001(normal) 377,810,528 -1.1%
pmcOrPats(normal) 60,075,264 -0.5%
geo. mean -0.4%
minimum -14.1%
maximum +5.3%
Runtime changes
haddock.Cabal(normal) 27,351,988,792 -0.7%
haddock.base(normal) 26,997,212,560 -0.6%
haddock.compiler(normal) 219,531,332,960 -1.0%
Metric Decrease:
LinkableUsage01
ManyConstructors
T17949
T21839c
T13035
TcPlugin_RewritePerf
hard_hole_fits
Metric Increase:
T3064
- - - - -
5cbc2c82 by Matthew Pickering at 2026-04-03T19:57:02-04:00
bytecode: Add magic header/version to bytecode files
In order to avoid confusing errors when using stale interface files (ie
from an older compiler version), we add a simple header/version check
like the one for interface files.
Fixes #27068
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d95a1936 by fendor at 2026-04-03T19:57:02-04:00
Add constants for bytecode in-memory buffer size
Introduce a common constant for the default size of the .gbc and
.bytecodelib binary buffer.
The buffer is by default set to 1 MB.
- - - - -
b822c30a by mangoiv at 2026-04-03T19:57:49-04:00
testsuite: filter stderr for static001 on darwin
This reactivates the test on x86_64 darwin as this should have been done
long ago and ignores warnings emitted by ranlib on newer version of the
darwin toolchain since they are benign. (no symbols for stub libraries)
Fixes #27116
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28ce1f8a by Andreas Klebinger at 2026-04-03T19:58:44-04:00
Give the Data instance for ModuleName a non-bottom toConstr implementation.
I've also taken the liberty to add Note [Data.Data instances for GHC AST Types]
describing some of the uses of Data.Data I could find.
Fixes #27129
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8ca41ffe by mangoiv at 2026-04-03T19:59:30-04:00
issue template: fix add bug label
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3981db0c by Sylvain Henry at 2026-04-03T20:00:33-04:00
Add more canned GC functions for common register patterns (#27142)
Based on analysis of heap-check sites across the GHC compiler and Cabal,
the following patterns were not covered by existing canned GC functions
but occurred frequently enough to warrant specialisation:
stg_gc_ppppp -- 5 GC pointers
stg_gc_ip -- unboxed word + GC pointer
stg_gc_pi -- GC pointer + unboxed word
stg_gc_ii -- two unboxed words
stg_gc_bpp -- byte (I8) + two GC pointers
Adding these reduces the fraction of heap-check sites falling back to
the generic GC path from ~1.4% to ~0.4% when compiling GHC itself.
Co-Authored-By: Claude Sonnet 4.6 <noreply(a)anthropic.com>
- - - - -
d17d1435 by Matthew Pickering at 2026-04-03T20:01:19-04:00
Make home unit dependencies stored as sets
Co-authored-by: Wolfgang Jeltsch <wolfgang(a)well-typed.com>
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92a97015 by Simon Peyton Jones at 2026-04-05T00:58:57+01:00
Add Invariant (NoTypeShadowing) to Core
This commit addresses #26868, by adding
a new invariant (NoTypeShadowing) to Core.
See Note [No type-shadowing in Core] in GHC.Core
- - - - -
8b5a5020 by Simon Peyton Jones at 2026-04-05T00:58:57+01:00
Major refactor of free-variable functions
For some time we have had two free-variable mechanims for types:
* The "FV" mechanism, embodied in GHC.Utils.FV, which worked OK, but
was fragile where eta-expansion was concerned.
* The TyCoFolder mechanism, using a one-shot EndoOS accumulator
I finally got tired of this and refactored the whole thing, thereby
addressing #27080. Now we have
* `GHC.Types.Var.FV`, which has a composable free-variable result type,
very much in the spirit of the old `FV`, but much more robust.
(It uses the "one shot trick".)
* GHC.Core.TyCo.FVs now has just one technology for free variables.
All this led to a lot of renaming.
There are couple of error-message changes. The change in T18451
makes an already-poor error message even more mysterious. But
it really needs a separate look.
We also now traverse the AST in a different order leading to a different
but still deterministic order for FVs and test output has been adjusted
accordingly.
- - - - -
4bf040c6 by sheaf at 2026-04-05T14:56:29-04:00
Add utility pprTrace_ function
This function is useful for quick debugging, as it can be added to a
where clause to pretty-print debugging information:
fooBar x y
| cond = body1
| otherwise = body2
where
!_ = pprTrace_ "fooBar" $
vcat [ text "x:" <+> ppr x
, text "y:" <+> ppr y
, text "cond:" <+> ppr cond
]
- - - - -
502e6ffe by Andrew Lelechenko at 2026-04-07T04:47:21-04:00
base: improve error message for Data.Char.chr
As per https://github.com/haskell/core-libraries-committee/issues/384
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b21bd52e by Simon Peyton Jones at 2026-04-07T04:48:07-04:00
Refactor FunResCtxt a bit
Fixes #27154
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7fe84ea5 by Zubin Duggal at 2026-04-07T19:11:52+05:30
compiler: Warn when -finfo-table-map is used with -fllvm
These are currently not supported together.
Fixes #26435
- - - - -
4a45a7da by Matthew Pickering at 2026-04-08T04:37:29-04:00
packaging: correctly propagate build/host/target to bindist configure script
At the moment the host and target which we will produce a compiler for
is fixed at the initial configure time. Therefore we need to persist
the choice made at this time into the installation bindist as well so we
look for the right tools, with the right prefixes at install time.
In the future, we want to provide a bit more control about what kind of
bindist we produce so the logic about what the host/target will have to
be written by hadrian rather than persisted by the configure script. In
particular with cross compilers we want to either build a normal stage 2
cross bindist or a stage 3 bindist, which creates a bindist which has a
native compiler for the target platform.
Fixes #21970
Co-authored-by: Sven Tennie <sven.tennie(a)gmail.com>
- - - - -
b0950df6 by Sven Tennie at 2026-04-08T04:37:29-04:00
Cross --host and --target no longer required for cross (#21970)
We set sane defaults in the configure script. Thus, these paramenters
aren't required any longer.
- - - - -
fef35216 by Sven Tennie at 2026-04-08T04:37:30-04:00
ci: Define USER_CONF_CC_OPTS_STAGE2 for aarch64/mingw
ghc-toolchain doesn't see $CONF_CC_OPTS_STAGE2 when the bindist gets
configured. So, the hack to override the compiler gets lost.
- - - - -
8dd6f453 by Cheng Shao at 2026-04-08T04:38:11-04:00
ghci: use ShortByteString for LookupSymbol/LookupSymbolInDLL/LookupClosure messages
This patch refactors ghci to use `ShortByteString` for
`LookupSymbol`/`LookupSymbolInDLL`/`LookupClosure` messages as the
first part of #27147.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
371ef200 by Cheng Shao at 2026-04-08T04:38:11-04:00
ghci: use ShortByteString for MkCostCentres message
This patch refactors ghci to use `ShortByteString` for `MkCostCentres`
messages as a first part of #27147. This also considerably lowers the
memory overhead of breakpoints when cost center profiling is enabled.
-------------------------
Metric Decrease:
interpreter_steplocal
-------------------------
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
4a122bb6 by Phil Hazelden at 2026-04-08T20:49:42-04:00
Implement modifiers syntax.
The `%m` syntax of linear types is now accepted in more places, to allow
use by future extensions, though so far linear types is still the only
consumer.
This may break existing code where it
* Uses -XLinearTypes.
* Has code of the form `a %m -> b`, where `m` can't be inferred to be
kind Multiplicity.
The code can be fixed either by adding a kind annotation, or by setting
`-XLinearTypes -XNoModifiers`.
Proposal:
https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0370-m…
- - - - -
07267f79 by Zubin Duggal at 2026-04-08T20:50:25-04:00
hadrian: Don't include the package hash in the haddock directory
Since GHC 9.8 and hash_unit_ids, haddock urls have looked like`ghc-9.10.3/doc/html/libraries/base-4.20.2.0-39f9/**/*.html`
The inclusion of the hash makes it hard for downstream non-boot packages to properly link to these files, as the hash is not
part of a standard cabal substitution.
Since we only build one version of each package, we don't need the hash to disambiguate anything, we can just remove it.
Fixes #26635
- - - - -
0a83b95b by ARATA Mizuki at 2026-04-08T20:51:18-04:00
testsuite: Allow multiple ways to be run by setting multiple command-line options
This patch allows multiple `--test-way`s to take effect, like:
$ hadrian/build test --test-way=normal --test-way=llvm
Previously, only one way was run if the test speed was 'normal' or 'fast'.
Closes #26926
Co-authored-by: sheaf <sam.derbyshire(a)gmail.com>
- - - - -
e841931c by Teo Camarasu at 2026-04-08T20:52:00-04:00
doc: improve eventlog-flush-interval flag documentation
We mention the performance cost and how this flag can be turned off.
Resolves #27056
- - - - -
e332db25 by Teo Camarasu at 2026-04-08T20:52:01-04:00
docs/user_guide: fix typo
- - - - -
5b82080a by Simon Jakobi at 2026-04-08T20:52:44-04:00
Fix -dsuppress-uniques for free variables in demand signatures
Before: Str=b{sXyZ->S}
With this patch: Str=b{S}
T13143.stderr is updated accordingly.
Fixes #27106.
- - - - -
b7a084cc by Simon Jakobi at 2026-04-08T20:53:27-04:00
Documentation fixes for demand signature notation
Fixes #27115.
- - - - -
59391132 by Simon Jakobi at 2026-04-08T20:54:08-04:00
Use upsert for non-deleting map updates
Some compiler functions were using `alter`, despite never removing
any entries: they only update an existing entry or insert a new one.
These functions are converted to using `upsert`:
alter :: (Maybe a -> Maybe a) -> Key -> Map a -> Map a
upsert :: (Maybe a -> a) -> Key -> Map a -> Map a
`upsert` variants are also added to APIs of the various Word64Map
wrapper types.
The precedent for this `upsert` operation is in the containers library:
see https://github.com/haskell/containers/pull/1145
Metrics: compile_time/bytes allocated
-------------------------------------
geo. mean: -0.1%
minimum: -0.5%
maximum: +0.0%
Resolves #27140.
- - - - -
da7e82f4 by Cheng Shao at 2026-04-08T20:54:49-04:00
testsuite: fix testsuite run for +ipe again
This patch makes the +ipe flavour transformer pass the entire
testsuite again by dropping stdout/stderr checks of certain tests that
are sensitive to stack layout changes with `+ipe`. Related: #26799.
- - - - -
b135a87d by Zubin Duggal at 2026-04-09T19:36:50+05:30
Bump directory submodule to 1.3.11.0 (unreleased)
- - - - -
3a291d07 by Zubin Duggal at 2026-04-09T19:36:50+05:30
Bump file-io submodule to 0.2.0
- - - - -
e0ab606d by Zubin Duggal at 2026-04-10T18:40:20+05:30
Release notes for GHC 10.0
- - - - -
e08b9b34 by Zubin Duggal at 2026-04-10T18:40:20+05:30
Bump ghc-prim version to 0.14.0
- - - - -
a92aac6e by Zubin Duggal at 2026-04-10T18:40:20+05:30
Bump template-haskell to 2.25.0.0; update submodule exceptions for TH 2.25
- - - - -
f254d9e8 by Zubin Duggal at 2026-04-10T18:40:20+05:30
Bump GHC version to 10.0
- - - - -
6ce0368a by Zubin Duggal at 2026-04-10T18:40:28+05:30
Bump base to 4.23.0.0; update submodules for base 4.24 upper bound
- - - - -
702fb8a5 by Zubin Duggal at 2026-04-10T18:40:28+05:30
Bump GHC version to 10.1; update submodules template-haskell-lift and template-haskell-quasiquoter for ghc-internal 10.200
- - - - -
75df1ca4 by Zubin Duggal at 2026-04-10T18:40:28+05:30
Use changelog.d for release notes (#26002)
GHC now uses a fragment-based changelog workflow using a custom script adapted from https://codeberg.org/fgaz/changelog-d.
Contributors add a file in changelog.d/ for each user-facing change.
At release time, these are assembled into release notes for sphinx (in RST) format, using
the tool.
New hadrian `changelog` target to generate changelogs
CI job to validate changelog entries for MRs unless skipped with ~"no-changelog" label
Teach sphinx about ghc-mr: extlink to link to MRs
Remove `ghc-package-list` from sphinx, and implement it in changelog-d instead (Fixes #26476).
(cherry picked from commit 989c07249978f418dfde1353abfad453f024d61a)
- - - - -
585d7450 by Luite Stegeman at 2026-04-11T02:17:13-04:00
tc: discard warnings in tcUserStmt Plan C
We typecheck let_stmt twice, but we don't want the warnings twice!
see #26233
- - - - -
2df604e9 by Sylvain Henry at 2026-04-11T02:19:30-04:00
Introduce TargetInt to represent target's Int (#15973)
GHC was using host 'Int' in several places to represent values that
live in the target machine's 'Int' type. This is silently wrong when
cross-compiling from a 32-bit host to a 64-bit target: the host Int
is 32 bits while the target Int is 64 bits.
See Note [TargetInt] in GHC.Platform.
Also used the opportunity to make DynTag = Word8.
Fixes #15973
Co-Authored-By: Claude Sonnet 4.6 <noreply(a)anthropic.com>
- - - - -
d419e972 by Luite Stegeman at 2026-04-13T15:16:04-04:00
Suppress desugaring warnings in the pattern match checker
Avoid duplicating warnings from the actual desugaring pass.
fixes #25996
- - - - -
c5b80dd0 by Phil de Joux at 2026-04-13T15:16:51-04:00
Typo ~/ghc/arch-os-version/environments
- - - - -
71462fff by Luite Stegeman at 2026-04-13T15:17:38-04:00
add changelog entry for #26233
- - - - -
d1ddfd4b by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
Add test for #25636
The existing test behaviour of "T23146_liftedeq" changed because the
simplifier now does a bit more inlining. We can restore the previous bad
behavior by using an OPAQUE pragma.
This test doubles as a test for #25636 when run in ghci, so we add it as
such.
- - - - -
b9df40ee by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
refactor: protoBCOName is always a Name
Simplifies the code by removing the unnecessary type argument to
ProtoBCO which was always 'Name'
- - - - -
5c2a179e by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
Allocate static constructors for bytecode
This commit adds support for static constructors when compiling and
linking ByteCode objects.
Top-level StgRhsCon get lowered to ProtoStaticCons rather than to
ProtoBCOs. A ProtoStaticCon gets allocated directly as a data con
application on the heap (using the new primop newConApp#).
Previously, we would allocate a ProtoBCO which, when evaluated, would
PACK and return the constructor.
A few more details are given in Note [Static constructors in Bytecode].
Secondly, this commit also fixes issue #25636 which was caused by
linking *unlifted* constructors in BCO instructions as
- (1) a thunk indexing the array of BCOs in a module
- (2) which evaluated to a BCO which still had to be evaluated to
return the unlifted constructor proper.
The (2) issue has been resolved by allocating the static constructors
directly. The (1) issue can be resolved by ensuring that we allocate all
unlifted top-level constructors eagerly, and leave the knot-tying for
the lifted BCOs and top-level constructors only.
The top-level unlifted constructors are never mutually recursive, so we
can allocate them all in one go as long as we do it in topological
order. Lifted fields of unlifted constructors can still be filled by the
knot-tied lifted variables since in those fields it is fine to keep
those thunks. See Note [Tying the knot in createBCOs] for more details.
Fixes #25636
-------------------------
Metric Decrease:
LinkableUsage01
-------------------------
- - - - -
cde47053 by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
Revert "StgToByteCode: Assert that PUSH_G'd values are lifted"
This reverts commit ec26c54d818e0cd328276196930313f66b780905.
Ever since f7a22c0f4e9ae0dc767115d4c53fddbd8372b777, we now do support
and will link top-level unlifted constructors into evaluated and
properly tagged values which we can reference with PUSH_G.
This assertion is no longer true and triggered a failure in T25636
- - - - -
c7a7e5b8 by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
refactor: Tag more remote Ptrs as RemotePtr
Pure refactor which improves the API of
- GHC.ByteCode.Linker
- GHC.Runtime.Interpreter
- GHC.Runtime.Interpreter.Types.SymbolCache
by using `RemotePtr` for more functions which used to return `Ptr`s that
could potentially be in a foreign process. E.g. `lookupIE`,
`lookupStaticPtr`, etc...
- - - - -
fc59494c by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
Add float# and subword tests for #25636
These tests cover that static constructors in bytecode work correctly
for Float# and subword values (Word8#, Word16#)
- - - - -
477f521b by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
test: Validate topoSort logic in createBCOs
This test validates that the topological sorting and ordering of the
unlifted constructors and lifted constructors in `createBCOs` is
correct.
See `Note [Tying the knot in createBCOs]` for why tying the knot for the
created BCOs is slightly difficult and why the topological sorting is
necessary.
This test fails when `let topoSortedObjs = topSortObjs objs` is
substituted by `let topoSortedObjs = zip [0..] objs`, thus witnessing
the toposort logic is correct and necessary.
The test calls the ghci `createBCOs` directly because it is currently
impossible to construct in Source Haskell a situation where a top-level
static unlifted constructor depends on another (we don't have top-level
unlifted constructors except for nullary constructors like `Leaf ::
(UTree :: UnliftedType)`).
This is another test for fix for #25636
- - - - -
2d9c30be by Simon Jakobi at 2026-04-14T18:42:00-04:00
Improve tests for `elem`
...in order to simplify the work on #27096.
* Improve T17752 by including the Core output in golden files, checking
both -O1 and -O2.
* Add tests for fusion and no-fusion cases.
Fixes #27101.
- - - - -
5ab0507c by Duncan Coutts at 2026-04-16T09:41:22+01:00
Use response files for hadrian linking with ghc (support long command lines)
In future support for windows dynamic linking, we expect long command
lines for linking dll files with ghc. Experiments with dynamic linking the
ghc-internal library yielded a link command well over 32kb. We did not
encounter this before for static libs, since we already use ar's @file
feature (if available, which it is for the llvm toolchain).
Co-authored-by: David Eichmann <davide(a)well-typed.com>
- - - - -
814 changed files:
- .gitlab-ci.yml
- .gitlab/ci.sh
- .gitlab/generate-ci/gen_ci.hs
- .gitlab/issue_templates/default.md
- .gitlab/issue_templates/release_tracking.md
- .gitlab/jobs.yaml
- .gitlab/merge_request_templates/Default.md
- .gitlab/rel_eng/mk-ghcup-metadata/mk_ghcup_metadata.py
- + changelog.d/T25636
- + changelog.d/changelog-entries
- + changelog.d/config
- + changelog.d/fix-duplicate-pmc-warnings
- + changelog.d/fix-ghci-duplicate-warnings-26233
- compiler/GHC.hs
- compiler/GHC/Builtin/PrimOps.hs
- compiler/GHC/Builtin/primops.txt.pp
- compiler/GHC/ByteCode/Asm.hs
- + compiler/GHC/ByteCode/Binary.hs
- compiler/GHC/ByteCode/Breakpoints.hs
- compiler/GHC/ByteCode/InfoTable.hs
- compiler/GHC/ByteCode/Instr.hs
- compiler/GHC/ByteCode/Linker.hs
- + compiler/GHC/ByteCode/Recomp/Binary.hs
- compiler/GHC/ByteCode/Serialize.hs
- compiler/GHC/ByteCode/Types.hs
- compiler/GHC/Cmm/CommonBlockElim.hs
- compiler/GHC/Cmm/Dataflow/Graph.hs
- compiler/GHC/Cmm/Dataflow/Label.hs
- compiler/GHC/Cmm/LayoutStack.hs
- compiler/GHC/Cmm/Liveness.hs
- compiler/GHC/Cmm/Utils.hs
- compiler/GHC/CmmToAsm/CFG.hs
- compiler/GHC/CmmToAsm/LA64/CodeGen.hs
- compiler/GHC/CmmToAsm/LA64/Instr.hs
- compiler/GHC/CmmToAsm/LA64/Ppr.hs
- compiler/GHC/Core.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/FVs.hs
- compiler/GHC/Core/Lint.hs
- compiler/GHC/Core/Multiplicity.hs
- compiler/GHC/Core/Opt/Arity.hs
- compiler/GHC/Core/Opt/DmdAnal.hs
- compiler/GHC/Core/Opt/SetLevels.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Core/RoughMap.hs
- compiler/GHC/Core/Rules.hs
- compiler/GHC/Core/Subst.hs
- compiler/GHC/Core/Tidy.hs
- compiler/GHC/Core/TyCo/FVs.hs
- compiler/GHC/Core/TyCo/Ppr.hs
- compiler/GHC/Core/TyCo/Rep.hs
- compiler/GHC/Core/TyCo/Subst.hs
- compiler/GHC/Core/TyCon.hs
- compiler/GHC/Core/TyCon/Env.hs
- compiler/GHC/Core/Type.hs
- compiler/GHC/Core/Unfold.hs
- compiler/GHC/Core/Unify.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToStg.hs
- compiler/GHC/CoreToStg/AddImplicitBinds.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Data/FastString/Env.hs
- compiler/GHC/Data/TrieMap.hs
- compiler/GHC/Data/Word64Map/Internal.hs
- compiler/GHC/Data/Word64Map/Lazy.hs
- compiler/GHC/Data/Word64Map/Strict.hs
- compiler/GHC/Data/Word64Map/Strict/Internal.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Hooks.hs
- compiler/GHC/Driver/Main.hs
- compiler/GHC/Driver/Phases.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Plugins.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Binds.hs
- compiler/GHC/Hs/Decls.hs
- compiler/GHC/Hs/DocString.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/Expr.hs-boot
- compiler/GHC/Hs/Instances.hs
- compiler/GHC/Hs/Pat.hs
- compiler/GHC/Hs/Syn/Type.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/Hs/Utils.hs
- compiler/GHC/HsToCore/Arrows.hs
- compiler/GHC/HsToCore/Binds.hs
- compiler/GHC/HsToCore/Breakpoints.hs
- compiler/GHC/HsToCore/Docs.hs
- compiler/GHC/HsToCore/Errors/Ppr.hs
- compiler/GHC/HsToCore/Errors/Types.hs
- compiler/GHC/HsToCore/Expr.hs
- compiler/GHC/HsToCore/Match.hs
- compiler/GHC/HsToCore/Monad.hs
- compiler/GHC/HsToCore/Pmc.hs
- compiler/GHC/HsToCore/Pmc/Desugar.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/HsToCore/Ticks.hs
- compiler/GHC/HsToCore/Usage.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Iface/Ext/Utils.hs
- compiler/GHC/Iface/Recomp.hs
- compiler/GHC/Iface/Recomp/Types.hs
- compiler/GHC/Iface/Syntax.hs
- compiler/GHC/Iface/Type.hs
- compiler/GHC/Linker/ByteCode.hs
- compiler/GHC/Linker/Deps.hs
- compiler/GHC/Linker/Loader.hs
- compiler/GHC/Linker/Types.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Annotation.hs
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Errors/Types.hs
- compiler/GHC/Parser/HaddockLex.x
- compiler/GHC/Parser/Lexer.x
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Parser/PostProcess/Haddock.hs
- compiler/GHC/Parser/Types.hs
- compiler/GHC/Platform.hs
- compiler/GHC/Platform/Tag.hs
- compiler/GHC/Rename/Bind.hs
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Rename/Expr.hs
- compiler/GHC/Rename/Expr.hs-boot
- compiler/GHC/Rename/Fixity.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/Rename/Lit.hs
- compiler/GHC/Rename/Module.hs
- compiler/GHC/Rename/Names.hs
- compiler/GHC/Rename/Pat.hs
- compiler/GHC/Rename/Splice.hs
- compiler/GHC/Rename/Splice.hs-boot
- compiler/GHC/Rename/Utils.hs
- compiler/GHC/Runtime/Debugger/Breakpoints.hs
- compiler/GHC/Runtime/Interpreter.hs
- compiler/GHC/Runtime/Interpreter/Types/SymbolCache.hs
- compiler/GHC/Runtime/Loader.hs
- compiler/GHC/Stg/Lint.hs
- compiler/GHC/StgToByteCode.hs
- compiler/GHC/StgToCmm.hs
- compiler/GHC/StgToCmm/Bind.hs
- compiler/GHC/StgToCmm/Closure.hs
- compiler/GHC/StgToCmm/DataCon.hs
- compiler/GHC/StgToCmm/Env.hs
- compiler/GHC/StgToCmm/Expr.hs
- compiler/GHC/StgToCmm/Foreign.hs
- compiler/GHC/StgToCmm/Heap.hs
- compiler/GHC/StgToCmm/InfoTableProv.hs
- compiler/GHC/StgToCmm/Layout.hs
- compiler/GHC/StgToCmm/Prim.hs
- compiler/GHC/StgToCmm/Prof.hs
- compiler/GHC/StgToCmm/Ticky.hs
- compiler/GHC/StgToCmm/Utils.hs
- compiler/GHC/StgToJS/Prim.hs
- compiler/GHC/Tc/Deriv.hs
- compiler/GHC/Tc/Deriv/Generate.hs
- compiler/GHC/Tc/Deriv/Infer.hs
- compiler/GHC/Tc/Deriv/Utils.hs
- compiler/GHC/Tc/Errors.hs
- compiler/GHC/Tc/Errors/Hole.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Arrow.hs
- compiler/GHC/Tc/Gen/Bind.hs
- compiler/GHC/Tc/Gen/Default.hs
- compiler/GHC/Tc/Gen/Do.hs
- + compiler/GHC/Tc/Gen/Expand.hs
- compiler/GHC/Tc/Gen/Export.hs
- compiler/GHC/Tc/Gen/Expr.hs
- compiler/GHC/Tc/Gen/Expr.hs-boot
- compiler/GHC/Tc/Gen/Foreign.hs
- compiler/GHC/Tc/Gen/Head.hs
- compiler/GHC/Tc/Gen/HsType.hs
- compiler/GHC/Tc/Gen/Match.hs
- compiler/GHC/Tc/Gen/Match.hs-boot
- compiler/GHC/Tc/Gen/Pat.hs
- compiler/GHC/Tc/Gen/Sig.hs
- compiler/GHC/Tc/Gen/Splice.hs
- compiler/GHC/Tc/Instance/Class.hs
- compiler/GHC/Tc/Instance/Family.hs
- compiler/GHC/Tc/Instance/FunDeps.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Tc/Solver/Solve.hs
- compiler/GHC/Tc/Solver/Types.hs
- compiler/GHC/Tc/TyCl.hs
- compiler/GHC/Tc/TyCl/Class.hs
- compiler/GHC/Tc/TyCl/Instance.hs
- compiler/GHC/Tc/TyCl/PatSyn.hs
- compiler/GHC/Tc/TyCl/Utils.hs
- compiler/GHC/Tc/Types.hs
- compiler/GHC/Tc/Types/BasicTypes.hs
- compiler/GHC/Tc/Types/Constraint.hs
- compiler/GHC/Tc/Types/CtLoc.hs
- compiler/GHC/Tc/Types/ErrCtxt.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Types/LclEnv.hs
- compiler/GHC/Tc/Types/Origin.hs
- compiler/GHC/Tc/Types/Origin.hs-boot
- compiler/GHC/Tc/Utils/Env.hs
- compiler/GHC/Tc/Utils/Instantiate.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/Tc/Utils/TcType.hs
- compiler/GHC/Tc/Utils/TcType.hs-boot
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/Tc/Validity.hs
- compiler/GHC/Tc/Zonk/TcType.hs
- compiler/GHC/Tc/Zonk/Type.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/Demand.hs
- compiler/GHC/Types/Error.hs
- + compiler/GHC/Types/Error.hs-boot
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/Hint.hs
- compiler/GHC/Types/Hint/Ppr.hs
- compiler/GHC/Types/Id.hs
- compiler/GHC/Types/Id/Info.hs
- compiler/GHC/Types/Name/Env.hs
- compiler/GHC/Types/Name/Occurrence.hs
- compiler/GHC/Types/Name/Reader.hs
- compiler/GHC/Types/Name/Set.hs
- compiler/GHC/Types/SrcLoc.hs
- compiler/GHC/Types/Unique/DFM.hs
- compiler/GHC/Types/Unique/FM.hs
- compiler/GHC/Types/Var/Env.hs
- + compiler/GHC/Types/Var/FV.hs
- compiler/GHC/Types/Var/Set.hs
- compiler/GHC/Unit/Finder.hs
- compiler/GHC/Unit/Home/Graph.hs
- compiler/GHC/Unit/Home/ModInfo.hs
- compiler/GHC/Unit/Module/Deps.hs
- compiler/GHC/Unit/Module/Location.hs
- compiler/GHC/Unit/Module/Status.hs
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- testsuite/tests/rep-poly/RepPolyRecordUpdate.stderr
- testsuite/tests/roles/should_fail/Roles5.hs
- testsuite/tests/roles/should_fail/Roles5.stderr
- testsuite/tests/rts/KeepCafsMain.hs
- testsuite/tests/runghc/Makefile
- + testsuite/tests/runghc/T16145.hs
- + testsuite/tests/runghc/T16145.stdout
- + testsuite/tests/runghc/T16145_aux.hs
- testsuite/tests/runghc/all.T
- testsuite/tests/showIface/DocsInHiFile.hs
- testsuite/tests/showIface/DocsInHiFile1.stdout
- testsuite/tests/showIface/DocsInHiFileTH.hs
- testsuite/tests/showIface/DocsInHiFileTH.stdout
- testsuite/tests/showIface/DocsInHiFileTHExternal.hs
- testsuite/tests/showIface/HaddockIssue849.hs
- testsuite/tests/showIface/HaddockIssue849.stdout
- testsuite/tests/showIface/HaddockOpts.hs
- testsuite/tests/showIface/HaddockOpts.stdout
- testsuite/tests/showIface/HaddockSpanIssueT24378.hs
- testsuite/tests/showIface/HaddockSpanIssueT24378.stdout
- testsuite/tests/showIface/MagicHashInHaddocks.hs
- testsuite/tests/showIface/MagicHashInHaddocks.stdout
- testsuite/tests/showIface/Makefile
- testsuite/tests/showIface/NoExportList.hs
- testsuite/tests/showIface/NoExportList.stdout
- testsuite/tests/showIface/PragmaDocs.stdout
- testsuite/tests/showIface/ReExports.stdout
- testsuite/tests/simplCore/T9646/test.T
- testsuite/tests/simplCore/should_compile/DsSpecPragmas.stderr
- testsuite/tests/simplCore/should_compile/T15205.stderr
- testsuite/tests/simplCore/should_compile/T21960.hs
- testsuite/tests/simplCore/should_compile/T24229a.stderr
- testsuite/tests/simplCore/should_compile/T24229b.stderr
- testsuite/tests/simplCore/should_compile/T24359a.stderr
- testsuite/tests/simplCore/should_compile/T26116.stderr
- testsuite/tests/simplCore/should_compile/T26709.stderr
- testsuite/tests/simplCore/should_compile/T4908.stderr
- testsuite/tests/simplCore/should_compile/spec-inline.stderr
- + testsuite/tests/simplCore/should_run/T27071.hs
- + testsuite/tests/simplCore/should_run/T27071.stdout
- testsuite/tests/simplCore/should_run/all.T
- testsuite/tests/th/TH_Promoted1Tuple.hs
- testsuite/tests/th/TH_Roles1.hs
- testsuite/tests/typecheck/no_skolem_info/T20063.stderr
- testsuite/tests/typecheck/no_skolem_info/T20232.hs
- testsuite/tests/typecheck/no_skolem_info/T20232.stderr
- + testsuite/tests/typecheck/should_compile/ExpansionQLIm.hs
- testsuite/tests/typecheck/should_compile/MutRec.hs
- testsuite/tests/typecheck/should_compile/T10770a.hs
- testsuite/tests/typecheck/should_compile/T11339.hs
- testsuite/tests/typecheck/should_compile/T11397.hs
- testsuite/tests/typecheck/should_compile/T13526.hs
- testsuite/tests/typecheck/should_compile/T14590.stderr
- testsuite/tests/typecheck/should_compile/T18467.hs
- testsuite/tests/typecheck/should_compile/T18467.stderr
- testsuite/tests/typecheck/should_compile/T25180.stderr
- testsuite/tests/typecheck/should_compile/all.T
- testsuite/tests/typecheck/should_compile/free_monad_hole_fits.stderr
- testsuite/tests/typecheck/should_compile/tc081.hs
- testsuite/tests/typecheck/should_compile/tc141.hs
- testsuite/tests/typecheck/should_compile/valid_hole_fits.stderr
- testsuite/tests/typecheck/should_fail/DoExpansion1.stderr
- testsuite/tests/typecheck/should_fail/DoExpansion2.stderr
- testsuite/tests/typecheck/should_fail/T10971d.stderr
- testsuite/tests/typecheck/should_fail/T12589.stderr
- testsuite/tests/typecheck/should_fail/T13311.stderr
- testsuite/tests/typecheck/should_fail/T17773.stderr
- testsuite/tests/typecheck/should_fail/T23427.hs
- testsuite/tests/typecheck/should_fail/T2846b.stderr
- testsuite/tests/typecheck/should_fail/T3323.stderr
- testsuite/tests/typecheck/should_fail/T3613.stderr
- testsuite/tests/typecheck/should_fail/T6069.stderr
- testsuite/tests/typecheck/should_fail/T6078.hs
- testsuite/tests/typecheck/should_fail/T7453.hs
- testsuite/tests/typecheck/should_fail/T7453.stderr
- testsuite/tests/typecheck/should_fail/T7851.stderr
- testsuite/tests/typecheck/should_fail/T7857.stderr
- testsuite/tests/typecheck/should_fail/T8570.hs
- testsuite/tests/typecheck/should_fail/T8570.stderr
- testsuite/tests/typecheck/should_fail/T8603.stderr
- testsuite/tests/typecheck/should_fail/T9612.stderr
- testsuite/tests/typecheck/should_fail/tcfail083.hs
- testsuite/tests/typecheck/should_fail/tcfail083.stderr
- testsuite/tests/typecheck/should_fail/tcfail084.hs
- testsuite/tests/typecheck/should_fail/tcfail084.stderr
- testsuite/tests/typecheck/should_fail/tcfail094.hs
- testsuite/tests/typecheck/should_fail/tcfail094.stderr
- testsuite/tests/typecheck/should_fail/tcfail102.stderr
- testsuite/tests/typecheck/should_fail/tcfail128.stderr
- testsuite/tests/typecheck/should_fail/tcfail140.stderr
- testsuite/tests/typecheck/should_fail/tcfail181.stderr
- testsuite/tests/typecheck/should_run/T1735.hs
- testsuite/tests/typecheck/should_run/T1735_Help/Basics.hs
- testsuite/tests/typecheck/should_run/T3731.hs
- + testsuite/tests/vdq-rta/should_compile/T26967.hs
- + testsuite/tests/vdq-rta/should_compile/T26967.stderr
- + testsuite/tests/vdq-rta/should_compile/T26967_tyop.hs
- + testsuite/tests/vdq-rta/should_compile/T26967_tyop.stderr
- testsuite/tests/vdq-rta/should_compile/all.T
- testsuite/tests/vdq-rta/should_fail/T24159_type_syntax_th_fail.script
- testsuite/tests/warnings/should_fail/CaretDiagnostics1.hs
- testsuite/tests/warnings/should_fail/CaretDiagnostics1.stderr
- testsuite/tests/warnings/should_fail/T24396c.hs
- testsuite/tests/warnings/should_fail/T24396c.stderr
- testsuite/tests/wasm/should_run/control-flow/LoadCmmGroup.hs
- + utils/changelog-d/ChangelogD.hs
- + utils/changelog-d/LICENSE
- + utils/changelog-d/README.md
- + utils/changelog-d/changelog-d.cabal
- utils/check-exact/ExactPrint.hs
- utils/check-exact/Main.hs
- utils/check-exact/Parsers.hs
- utils/check-exact/Transform.hs
- utils/check-exact/Utils.hs
- utils/deriveConstants/Main.hs
- utils/haddock/haddock-api/haddock-api.cabal
- utils/haddock/haddock-api/src/Haddock/Backends/Hoogle.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Hyperlinker/Parser.hs
- utils/haddock/haddock-api/src/Haddock/Backends/LaTeX.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Decl.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Utils.hs
- utils/haddock/haddock-api/src/Haddock/Convert.hs
- utils/haddock/haddock-api/src/Haddock/GhcUtils.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Create.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Rename.hs
- utils/haddock/haddock-api/src/Haddock/Interface/RenameType.hs
- utils/haddock/haddock-api/src/Haddock/InterfaceFile.hs
- utils/haddock/haddock-api/src/Haddock/Types.hs
- utils/haddock/haddock-library/haddock-library.cabal
- utils/haddock/haddock-test/haddock-test.cabal
- utils/haddock/haddock.cabal
- utils/haddock/html-test/src/LinearTypes.hs
- utils/haddock/latex-test/src/LinearTypes/LinearTypes.hs
- utils/hsc2hs
- utils/jsffi/dyld.mjs
The diff was not included because it is too large.
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[Git][ghc/ghc][wip/mangoiv/cherry-pick-fix-testdir] rts: Eliminate uses of implicit constant arrays
by Magnus (＠MangoIV) 16 Apr '26
by Magnus (＠MangoIV) 16 Apr '26
16 Apr '26
Magnus pushed to branch wip/mangoiv/cherry-pick-fix-testdir at Glasgow Haskell Compiler / GHC
Commits:
b422b4c3 by Ben Gamari at 2026-04-16T10:01:33+02:00
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.
(cherry picked from commit 0c00c9c3b4e9b8515d4839f2c1d7d771781dc6f4)
- - - - -
2 changed files:
- rts/Printer.c
- rts/posix/OSMem.c
Changes:
=====================================
rts/Printer.c
=====================================
@@ -1033,8 +1033,8 @@ findPtr(P_ p, int follow)
{
uint32_t g, n;
bdescr *bd;
- const int arr_size = 1024;
- StgPtr arr[arr_size];
+#define ARR_SIZE 1024
+ StgPtr arr[ARR_SIZE];
int i = 0;
searched = 0;
@@ -1044,24 +1044,24 @@ findPtr(P_ p, int follow)
// just before a block is used.
for (n = 0; n < getNumCapabilities(); n++) {
bd = nurseries[i].blocks;
- i = findPtrBlocks(p,bd,arr,arr_size,i);
- if (i >= arr_size) return;
+ i = findPtrBlocks(p,bd,arr,ARR_SIZE,i);
+ if (i >= ARR_SIZE) return;
}
#endif
for (g = 0; g < RtsFlags.GcFlags.generations; g++) {
bd = generations[g].blocks;
- i = findPtrBlocks(p,bd,arr,arr_size,i);
+ i = findPtrBlocks(p,bd,arr,ARR_SIZE,i);
bd = generations[g].large_objects;
- i = findPtrBlocks(p,bd,arr,arr_size,i);
- if (i >= arr_size) return;
+ i = findPtrBlocks(p,bd,arr,ARR_SIZE,i);
+ if (i >= ARR_SIZE) return;
for (n = 0; n < getNumCapabilities(); n++) {
i = findPtrBlocks(p, gc_threads[n]->gens[g].part_list,
- arr, arr_size, i);
+ arr, ARR_SIZE, i);
i = findPtrBlocks(p, gc_threads[n]->gens[g].todo_bd,
- arr, arr_size, i);
+ arr, ARR_SIZE, i);
}
- if (i >= arr_size) return;
+ if (i >= ARR_SIZE) return;
}
if (follow && i == 1) {
debugBelch("-->\n");
=====================================
rts/posix/OSMem.c
=====================================
@@ -585,7 +585,7 @@ void *osReserveHeapMemory(void *startAddressPtr, W_ *len)
}
#endif
- const int MAX_ATTEMPTS = 256;
+#define MAX_ATTEMPTS 256
void *bad_allocs[MAX_ATTEMPTS];
size_t bad_alloc_lens[MAX_ATTEMPTS];
memset(bad_allocs, 0, sizeof(void*) * MAX_ATTEMPTS);
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/b422b4c32c41648b828345085e1364c…
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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 5 commits: Simplify mkTick
by Marge Bot (＠marge-bot) 16 Apr '26
by Marge Bot (＠marge-bot) 16 Apr '26
16 Apr '26
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
20d59236 by sheaf at 2026-04-16T00:12:26-04:00
Simplify mkTick
This commit simplifies 'GHC.Core.Utils.mkTick', removing the
accumulating parameter 'rest' which was suspiciously treating a bunch of
different ticks as a group, and moving the group as a whole around the
AST, ignoring that the ticks in the group might have different placement
properties.
The most important change is that we revert the logic (added in 85b0aae2)
that allowed ticks to be placed around coercions, which caused serious
issues (e.g. #27121). It was just a mistake, as it doesn't make sense
to put a tick around a coercion.
Also adds Note [Pushing SCCs inwards] which clarifies the logic for
pushing SCCs into lambdas, constructor applications, and dropping SCCs
around non-function variables (in particular the treatment of splittable
ticks).
A few other changes are also implemented:
- simplify 'can_split' predicate (no functional change)
- combine profiling ticks into one when possible
Fixes #26878, #26941 and #27121
Co-authored-by: simonpj <simon.peytonjones(a)gmail.com>
- - - - -
7e3f6c79 by aparker at 2026-04-16T00:12:29-04:00
NCG: Implement constant folding for vector simd ops (Issue #25030)
- - - - -
d57d8967 by Simon Jakobi at 2026-04-16T00:12:31-04:00
Add regression test for #9074
Closes #9074.
- - - - -
ba6d9b90 by Sylvain Henry at 2026-04-16T00:12:58-04:00
Add changelog for #15973
- - - - -
41fb8dd4 by sheaf at 2026-04-16T00:13:19-04:00
Deal with 'noSpec' in 'coreExprToPmLit'
This commit makes two separate changes relating to
'GHC.HsToCore.Pmc.Solver.Types.coreExprAsPmLit':
1. Commit 7124e4ad mistakenly marked deferred errors as non-canonical,
which led to the introduction of 'nospec' wrappers in the
generated Core. This reverts that accident by declaring deferred
errors as being canonical, avoiding spurious 'nospec' wrapping.
2. Look through magic identity-like Ids such as 'nospec', 'inline' and
'lazy' in 'coreExprAsPmLit', just like Core Prep does.
There might genuinely be incoherent evidence, but that shouldn't
obstruct the pattern match checker. See test T27124a.
Fixes #25926 #27124
-------------------------
Metric Decrease:
T3294
-------------------------
- - - - -
37 changed files:
- + changelog.d/T15973
- + changelog.d/T27121.md
- + changelog.d/T27124.md
- + changelog.d/simd_constant_folding
- compiler/GHC/Cmm/Opt.hs
- compiler/GHC/Core/Opt/FloatOut.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/Stg/Debug.hs
- compiler/GHC/Tc/Errors.hs
- compiler/GHC/Types/Tickish.hs
- compiler/GHC/Utils/Misc.hs
- libraries/ghc-heap/tests/tso_and_stack_closures.hs
- + testsuite/tests/ghci/T9074/Makefile
- + testsuite/tests/ghci/T9074/T9074.hs
- + testsuite/tests/ghci/T9074/T9074.stdout
- + testsuite/tests/ghci/T9074/T9074a.c
- + testsuite/tests/ghci/T9074/T9074b.c
- + testsuite/tests/ghci/T9074/all.T
- + testsuite/tests/overloadedstrings/should_fail/T25926.hs
- + testsuite/tests/overloadedstrings/should_fail/T25926.stderr
- + testsuite/tests/overloadedstrings/should_fail/T27124.hs
- + testsuite/tests/overloadedstrings/should_fail/T27124.stderr
- + testsuite/tests/overloadedstrings/should_fail/all.T
- + testsuite/tests/overloadedstrings/should_run/T27124a.hs
- testsuite/tests/overloadedstrings/should_run/all.T
- + testsuite/tests/profiling/should_compile/T27121.hs
- + testsuite/tests/profiling/should_compile/T27121_aux.hs
- testsuite/tests/profiling/should_compile/all.T
- + testsuite/tests/simd/should_run/Makefile
- + testsuite/tests/simd/should_run/T25030.hs
- + testsuite/tests/simd/should_run/T25030.stdout
- testsuite/tests/simd/should_run/all.T
- + testsuite/tests/simplCore/should_compile/T26941.hs
- + testsuite/tests/simplCore/should_compile/T26941_aux.hs
- testsuite/tests/simplCore/should_compile/all.T
The diff was not included because it is too large.
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[Git][ghc/ghc][wip/rae/skip-tests] 146 commits: Introduce `-fimport-loaded-targets` GHCi flag
by Richard Eisenberg (＠rae) 16 Apr '26
by Richard Eisenberg (＠rae) 16 Apr '26
16 Apr '26
Richard Eisenberg pushed to branch wip/rae/skip-tests at Glasgow Haskell Compiler / GHC
Commits:
86bd9bfc by fendor at 2026-03-17T23:46:09-04:00
Introduce `-fimport-loaded-targets` GHCi flag
This new flag automatically adds all loaded targets to the GHCi session
by adding an `InteractiveImport` for the loaded targets.
By default, this flag is disabled, as it potentially increases memory-usage.
This interacts with the flag `-fno-load-initial-targets` as follows:
* If no module is loaded, no module is added as an interactive import.
* If a reload loads up to a module, all loaded modules are added as
interactive imports.
* Unloading modules removes them from the interactive context.
Fixes #26866 by rendering the use of a `-ghci-script` to achieve the
same thing redundant.
- - - - -
e3d4c1bb by mniip at 2026-03-17T23:47:03-04:00
ghc-internal: Remove GHC.Internal.Data.Eq
It served no purpose other than being a re-export.
- - - - -
6f4f6cf0 by mniip at 2026-03-17T23:47:03-04:00
ghc-internal: Refine GHC.Internal.Base imports
Removed re-exports from GHC.Internal.Base. This reveals some modules
that don't actually use anything *defined* in GHC.Internal.Base, and
that can be pushed down a little in the import graph.
Replaced most imports of GHC.Internal.Base with non-wildcard imports
from modules where the identifiers are actually defined.
Part of #26834
Metric Decrease:
T5321FD
- - - - -
7fb51f54 by mangoiv at 2026-03-17T23:48:00-04:00
ci: clone, don't copy when creating the cabal cache
Also removed WINDOWS_HOST variable detected via uname - we now just
check whether the CI job has windows in its name. This works because we
only ever care about it if the respective job is not a cross job. We
also statically detect darwin cross jobs in the same way. We only ever have
darwin -> darwin cross jobs so this is enough to detect the host
reliably.
- - - - -
f8817879 by mangoiv at 2026-03-17T23:48:44-04:00
ci: mark size_hello_artifact fragile on darwin x86
The size of the x86_64 hello artifact is not stable which results in flaky testruns.
Resolves #26814
- - - - -
e34cb6da by Adam Gundry at 2026-03-20T12:20:00-04:00
ghci: Mention active language edition in startup banner
Per GHC proposal 632, this makes the GHCi startup banner include
the active language edition, plus an indication of whether this
was the default (as opposed to being explicitly selected via an
option such as `-XGHC2024`). For example:
```
$ ghci
GHCi, version 9.14.1: https://www.haskell.org/ghc/ :? for help
Using default language edition: GHC2024
ghci>
```
Fixes #26037.
- - - - -
52c3e6ba by sheaf at 2026-03-20T12:21:09-04:00
Improve incomplete record selector warnings
This commit stops GHC from emitting spurious incomplete record selector
warnings for bare selectors/projections such as .fld
There are two places we currently emit incomplete record selector
warnings:
1. In the desugarer, when we see a record selector or an occurrence
of 'getField'. Here, we can use pattern matching information to
ensure we don't give false positives.
2. In the typechecker, which might sometimes give false positives but
can emit warnings in cases that the pattern match checker would
otherwise miss.
This is explained in Note [Detecting incomplete record selectors]
in GHC.HsToCore.Pmc.
Now, we obviously don't want to emit the same error twice, and generally
we prefer (1), as those messages contain fewer false positives. So we
suppress (2) when we are sure we are going to emit (1); the logic for
doing so is in GHC.Tc.Instance.Class.warnIncompleteRecSel,
and works by looking at the CtOrigin.
Now, the issue was that this logic handled explicit record selectors as
well as overloaded record field selectors such as "x.r" (which turns
into a simple GetFieldOrigin CtOrigin), but it didn't properly handle
record projectors like ".fld" or ".fld1.fld2" (which result in other
CtOrigins such as 'RecordFieldProjectionOrigin').
To solve this problem, we re-use the 'isHasFieldOrigin' introduced in
fbdc623a (slightly adjusted).
On the way, we also had to update the desugarer with special handling
for the 'ExpandedThingTc' case in 'ds_app', to make sure that
'ds_app_var' sees all the type arguments to 'getField' in order for it
to indeed emit warnings like in (1).
Fixes #26686
- - - - -
309d7e87 by Cheng Shao at 2026-03-20T12:21:53-04:00
rts: opportunistically grow the MutableByteArray# in-place in resizeMutableByteArray#
Following !15234, this patch improves `resizeMutableByteArray#` memory
efficiency by growing the `MutableByteArray#` in-place if possible,
addressing an old todo comment here. Also adds a new test case
`resizeMutableByteArrayInPlace` that stresses this behavior.
- - - - -
7d4ef162 by Matthew Craven at 2026-03-20T12:22:47-04:00
Change representation of floating point literals
This commit changes the representation of floating point literals
throughough the compiler, in particular in Core and Cmm.
The Rational type is deficient for this purpose, dealing poorly
with NaN, +/-Infinity, and negative zero. Instead, the new module
GHC.Types.Literal.Floating uses the host Float/Double type to represent
NaNs, infinities and negative zero. It also contains a Rational
constructor, for the benefit of -fexcess-precision.
Other changes:
- Remove Note [negative zero] and related code
This also removes the restrictions on constant-folding of division
by zero, and should make any problems with NaN/Infinity more obvious.
- Use -0.0 as the additive identity for Core constant folding rules
for floating-point addition, fixing #21227.
- Manual worker-wrapper for GHC.Float.rationalToDouble. This is
intended to prevent the compiler's WW on this function from
interfering with constant-folding. This change means that we now
avoid allocating a box for the result of a 'realToFrac' call in
T10359.
- Combine floatDecodeOp and doubleDecodeOp.
This change also fixes a bug in doubleDecodeOp wherein it
would incorrectly produce an Int# instead of an Int64#
literal for the mantissa component with 64-bit targets.
- Use Float/Double for assembly immediates, and update the X86 and
PowerPC backends to properly handle special values such as NaN and
infinity.
- Allow 'rational_to' to handle zero denominators, fixing a
TODO in GHC.Core.Opt.ConstantFold.
Fixes #8364 #9811 #18897 #21227
Progress towards #26919
Metric Decrease:
T10359
Co-authored-by: sheaf <sam.derbyshire(a)gmail.com>
-------------------------
Metric Decrease:
T1969
T5321FD
-------------------------
- - - - -
80e2dd4f by Zubin Duggal at 2026-03-20T12:23:33-04:00
compiler/ffi: Collapse void pointer chains in capi wrappers
New gcc/clang treat -Wincompatible-pointer-types as an error by
default. Since C only allows implicit conversion from void*, not void**,
capi wrappers for functions taking e.g. abstract** would fail to compile
when the Haskell type Ptr (Ptr Abstract) was naively translated to void**.
Collapse nested void pointers to a single void* when the pointee type
has no known C representation.
Fixes #26852
- - - - -
1c50bd7b by Luite Stegeman at 2026-03-20T12:24:37-04:00
Move some functions related to pointer tagging to a separate module
- - - - -
bfd7aafd by Luite Stegeman at 2026-03-20T12:24:37-04:00
Branchless unpacking for enumeration types
Change unpacking for enumeration types to go to Word8#/Word16#/Word#
directly instead of going through an intermediate unboxed sum. This
allows us to do a branchless conversion using DataToTag and TagToEnum.
Fixes #26970
- - - - -
72b20fc0 by Luite Stegeman at 2026-03-20T12:25:30-04:00
bytecode: Carefully SLIDE off the end of a stack chunk
The SLIDE bytecode instruction was not checking for stack chunk
boundaries and could corrupt the stack underflow frame, leading
to crashes.
We add a check to use safe writes if we cross the chunk boundary
and also handle stack underflow if Sp is advanced past the underflow
frame.
fix #27001
- - - - -
2e22b43c by Cheng Shao at 2026-03-20T12:26:14-04:00
ghci: serialize BCOByteArray buffer directly when possible
This patch changes the `Binary` instances of `BCOByteArray` to
directly serialize the underlying buffer when possible, while also
taking into account the issue of host-dependent `Word` width. See
added comments and amended `Note [BCOByteArray serialization]` for
detailed explanation. Closes #27020.
- - - - -
89d9ba37 by Sylvain Henry at 2026-03-20T12:27:34-04:00
JS: replace BigInt with Number arithmetic for 32/64-bit quot/rem (#23597)
Replace BigInt-based implementations of quotWord32, remWord32,
quotRemWord32, quotRem2Word32, quotWord64, remWord64, quotInt64, and
remInt64 with pure Number (double/integer) arithmetic to avoid the
overhead of BigInt promotion.
- - - - -
ae4ddd60 by Sylvain Henry at 2026-03-20T12:28:28-04:00
Core: add constant-folding rules for Addr# eq/ne (#18032)
- - - - -
3e767f98 by Matthew Pickering at 2026-03-20T12:29:11-04:00
Use OsPath rather than FilePath in Downsweep cache
This gets us one step closure to uniformly using `OsPath` in the
compiler.
- - - - -
2c57de29 by Cheng Shao at 2026-03-20T12:29:55-04:00
hadrian: fix ghc-in-ghci flavour stage0 shared libraries
This patch fixes missing stage0 shared libraries in hadrian
ghc-in-ghci flavour, which was accidentally dropped in
669d09f950a6e88b903d9fd8a7571531774d4d5d and resulted in a regression
in HLS support on linux/macos. Fixes #27057.
- - - - -
5b1be555 by Sylvain Henry at 2026-03-20T12:30:48-04:00
JS: install rts/Types.h header file (#27033)
It was an omission, making HsFFI.h not usable with GHC using the JS
backend.
- - - - -
b883f08f by Cheng Shao at 2026-03-20T12:31:33-04:00
hadrian: don't compile RTS with -Winline
This patch removes `-Winline` from cflags when compiling the RTS,
given that:
1. It generates a huge pile of spam and hurts developer experience
2. Whether inlining happens is highly dependent on toolchains,
flavours, etc, and it's not really an issue to fix if inlining
doesn't happen; it's a hint to the C compiler anyway.
Fixes #27060.
- - - - -
333387d6 by Cheng Shao at 2026-03-20T12:31:33-04:00
hadrian: compile libffi-clib with -Wno-deprecated-declarations
This patch adds `-Wno-deprecated-declarations` to cflags of
`libffi-clib`, given that it produces noise at compile-time that
aren't really our issue to fix anyway, it's from vendored libffi
source code.
- - - - -
67c47771 by Rodrigo Mesquita at 2026-03-20T12:32:17-04:00
Expose decodeStackWithIpe from ghc-experimental
This decoding is useful to the debugger and it wasn't originally
exported as an oversight.
- - - - -
18513365 by Matthew Pickering at 2026-03-21T04:43:26-04:00
Add support for custom external interpreter commands
It can be useful for GHC API clients to implement their own external
interpreter commands.
For example, the debugger may want an efficient way to inspect the
stacks of the running threads in the external interpreter.
- - - - -
4636d906 by mangoiv at 2026-03-21T04:44:10-04:00
ci: remove obsolete fallback for old debian and ubuntu versions
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2e3a2805 by mangoiv at 2026-03-21T04:44:10-04:00
ci: drop ubuntu 18 and 20
Ubuntu 18 EOL: May 2023
Ubuntu 20 EOL: May 2025
We should probably not make another major release supporting these platforms.
Also updates the generator script.
Resolves #25876
- - - - -
de54e264 by Cheng Shao at 2026-03-21T17:52:08+01:00
rts: fix -Wcompare-distinct-pointer-types errors
This commit fixes `-Wcompare-distinct-pointer-types` errors in the RTS
which should have been caught by the `validate` flavour but was
warnings in CI due to the recent `+werror` regression.
- - - - -
b9bd73de by Cheng Shao at 2026-03-21T17:52:08+01:00
ghc-internal: fix unused imports
This commit fixes unused imports in `ghc-internal` which should have
been caught by the `validate` flavour but was warnings in CI due to
the recent `+werror` regression. Fixes #26987 #27059.
- - - - -
da946a16 by Cheng Shao at 2026-03-21T17:03:51+00:00
ghci: fix unused imports
This commit fixes unused imports in `ghci` which should have been
caught by the `validate` flavour but was warnings in CI due to the
recent `+werror` regression. Fixes #26987 #27059.
- - - - -
955b1cf8 by Cheng Shao at 2026-03-21T17:03:51+00:00
compiler: fix unused imports in GHC.Tc.Types.Origin
This commit fixes unused imports in `GHC.Tc.Types.Origin` which should
have been caught by the `validate` flavour but was warnings in CI due
to the recent `+werror` regression. Fixes #27059.
- - - - -
3b1aeb50 by Cheng Shao at 2026-03-21T17:03:51+00:00
hadrian: fix missing +werror in validate flavour
This patch fixes missing `+werror` in validate flavour, which was an
oversight in bb3a2ba1eefadf0b2ef4f39b31337a23eec67f29. Fixes #27066.
- - - - -
44f118f0 by Cheng Shao at 2026-03-22T04:54:01-04:00
ci: bump CACHE_REV and add the missing reminder
This patch bumps `CACHE_REV` to address recent `[Cabal-7159]` CI
errors due to stale cabal cache on some runners, and also adds a
reminder to remind future maintainers. Fixes #27075.
- - - - -
2a218737 by ARATA Mizuki at 2026-03-23T11:11:39-04:00
Add 128-bit SIMD support to AArch64 NCG
Changes:
- Add `Format` field to vector-capable instructions.
These instructions will emit `vN.4s` (for example) as a operand.
- Additional constructors for `Operand`:
`OpVecLane` represents a vector lane and will be emitted as `vN.<width>[<index>]` (`vN.s[3]` for example).
`OpScalarAsVec` represents a scalar, but printed as a vector lane like `vN.<width>[0]` (`vN.s[0]` for example).
- Integer quot/rem are implemented in C, like x86.
Closes #26536
Metric Increase:
T3294
- - - - -
5d6e2be9 by ARATA Mizuki at 2026-03-23T11:11:39-04:00
AArch64 NCG: Improve code generation for floating-point and vector constants
Some floating-point constants can be directly encoded using the FMOV instruction.
Similarly, a class of vectors with same values can be encoded using FMOV, MOVI, or MVNI.
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c6d262aa by Simon Jakobi at 2026-03-23T11:12:22-04:00
Add regression test for #13729
Closes #13729.
- - - - -
aa5dfe67 by Sylvain Henry at 2026-03-26T03:48:56-04:00
Check that shift values are valid
In GHC's codebase in non-DEBUG builds we silently substitute shiftL/R
with unsafeShiftL/R for performance reasons. However we were not
checking that the shift value was valid for unsafeShiftL/R, leading to
wrong computations, but only in non-DEBUG builds.
This patch adds the necessary checks and reports an error when a wrong
shift value is passed.
- - - - -
c8a7b588 by Sylvain Henry at 2026-03-26T03:48:56-04:00
Implement basic value range analysis (#25718)
Perform basic value range analysis to try to determine at compile time
the result of the application of some comparison primops (ltWord#, etc.).
This subsumes the built-in rewrite rules used previously to check if one
of the comparison argument was a bound (e.g. (x :: Word8) <= 255 is
always True). Our analysis is more powerful and handles type
conversions: e.g. word8ToWord x <= 255 is now detected as always True too.
We also use value range analysis to filter unreachable alternatives in
case-expressions. To support this, we had to allow case-expressions for
primitive types to not have a DEFAULT alternative (as was assumed before
and checked in Core lint).
- - - - -
a5ec467e by ARATA Mizuki at 2026-03-26T03:49:49-04:00
rts: Align stack to 64-byte boundary in StgRun on x86
When LLVM spills AVX/AVX-512 vector registers to the stack, it requires
32-byte (__m256) or 64-byte (__m512) alignment. If the stack is not
sufficiently aligned, LLVM inserts a realignment prologue that reserves
%rbp as a frame pointer, conflicting with GHC's use of %rbp as an STG
callee-saved register and breaking the tail-call-based calling convention.
Previously, GHC worked around this by lying to LLVM about the stack
alignment and rewriting aligned vector loads/stores (VMOVDQA, VMOVAPS)
to unaligned ones (VMOVDQU, VMOVUPS) in the LLVM Mangler. This had two
problems:
- It did not extend to AVX-512, which requires 64-byte alignment. (#26595)
- When Haskell calls a C function that takes __m256/__m512 arguments on
the stack, the callee requires genuine alignment, which could cause a
segfault. (#26822)
This patch genuinely aligns the stack to 64 bytes in StgRun by saving
the original stack pointer before alignment and restoring it in
StgReturn. We now unconditionally advertise 64-byte stack alignment to
LLVM for all x86 targets, making rewriteAVX in the LLVM Mangler
unnecessary. STG_RUN_STACK_FRAME_SIZE is increased from 48 to 56 bytes
on non-Windows x86-64 to store the saved stack pointer.
Closes #26595 and #26822
Co-Authored-By: Claude Opus 4.5 <noreply(a)anthropic.com>
- - - - -
661da815 by Teo Camarasu at 2026-03-26T03:50:33-04:00
ghc-internal: Float Generics to near top of module graph
We remove GHC.Internal.Generics from the critical path of the
`ghc-internal` module graph. GHC.Internal.Generics used to be in the
middle of the module graph, but now it is nearer the top (built later).
This change thins out the module graph and allows us to get rid of the
ByteOrder hs-boot file.
We implement this by moving Generics instances from the module where the
datatype is defined to the GHC.Internal.Generics module. This trades off
increasing the compiled size of GHC.Internal.Generics with reducing the
dependency footprint of datatype modules.
Not all instances are moved to GHC.Internal.Generics. For instance,
`GHC.Internal.Control.Monad.Fix` keeps its instance as it is one of the
very last modules compiled in `ghc-internal` and so inverting the
relationship here would risk adding GHC.Internal.Generics back onto the
critical path.
We also don't change modules that are re-exported from the `template-haskell` or `ghc-heap`.
This is done to make it easy to eventually move `Generics` to `base`
once something like #26657 is implemented.
Resolves #26930
Metric Decrease:
T21839c
- - - - -
45428f88 by sheaf at 2026-03-26T03:51:31-04:00
Avoid infinite loop in deep subsumption
This commit ensures we only unify after we recur in the deep subsumption
code in the FunTy vs non-FunTy case of GHC.Tc.Utils.Unify.tc_sub_type_deep,
to avoid falling into an infinite loop.
See the new Wrinkle [Avoiding a loop in tc_sub_type_deep] in
Note [FunTy vs non-FunTy case in tc_sub_type_deep] in GHC.Tc.Utils.Unify.
Fixes #26823
Co-authored-by: simonpj <simon.peytonjones(a)gmail.com>
- - - - -
2823b039 by Ian Duncan at 2026-03-26T03:52:21-04:00
AArch64: fix MOVK regUsageOfInstr to mark dst as both read and written
MOVK (move with keep) modifies only a 16-bit slice of the destination
register, so the destination is both read and written. The register
allocator must know this to avoid clobbering live values. Update
regUsageOfInstr to list the destination in both src and dst sets.
No regression test: triggering the misallocation requires specific
register pressure around a MOVK sequence, which is difficult to
reliably provoke from Haskell source.
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57b7878d by Simon Jakobi at 2026-03-26T03:53:07-04:00
Add regression test for #12002
Closes #12002.
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c8f9df2d by Simon Jakobi at 2026-03-26T03:53:07-04:00
Add regression test for #12046
Closes #12046.
Co-authored-by: Andreas Klebinger <klebinger.andreas(a)gmx.at>
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615d72ac by Simon Jakobi at 2026-03-26T03:53:07-04:00
Add regression test for #13180
Closes #13180.
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423eebcf by Simon Jakobi at 2026-03-26T03:53:07-04:00
Add regression test for #11141
Closes #11141.
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286849a4 by Simon Jakobi at 2026-03-26T03:53:07-04:00
Add regression test for #11505
Closes #11505.
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7db149d9 by Simon Jakobi at 2026-03-26T03:53:07-04:00
Add regression perf test for #13820
Closes #13820.
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e73c4adb by Simon Jakobi at 2026-03-26T03:53:07-04:00
Add regression test for #10381
Closes #10381.
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5ebcfb57 by Benjamin Maurer at 2026-03-26T03:54:02-04:00
Generate assembly on x86 for word2float (#22252)
We used to emit C function call for MO_UF_Conv primitive.
Now emits direct assembly instead.
Co-Authored-By: Sylvain Henry <sylvain(a)haskus.fr>
Co-Authored-By: Claude Sonnet 4.6 <noreply(a)anthropic.com>
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5b550754 by Matthew Pickering at 2026-03-26T03:54:51-04:00
rts: forward clone-stack messages after TSO migration
MSG_CLONE_STACK assumed that the target TSO was still owned by the
capability that received the message. This is not always true: the TSO
can migrate before the inbox entry is handled.
When that happened, handleCloneStackMessage could clone a live stack from
the wrong capability and use the wrong capability for allocation and
performTryPutMVar, leading to stack sanity failures such as
checkStackFrame: weird activation record found on stack.
Fix this by passing the current capability into
handleCloneStackMessage, rechecking msg->tso->cap at handling time, and
forwarding the message if the TSO has migrated. Once ownership matches,
use the executing capability consistently for cloneStack, rts_apply, and
performTryPutMVar.
Fixes #27008
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ef0a1bd2 by mangoiv at 2026-03-26T03:55:34-04:00
release tracking: adopt release tracking ticket from #16816
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a7f40fd9 by mangoiv at 2026-03-26T03:55:34-04:00
release tracking: add a release tracking ticket
Brings the information in the release tracking ticket up to date with
https://gitlab.haskell.org/ghc/ghc-hq/-/blob/main/release-management.mkd
Resolves #26691
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161d3285 by Teo Camarasu at 2026-03-26T03:56:18-04:00
Revert "Set default eventlog-flush-interval to 5s"
Flushing the eventlog forces a synchronisation of all the capabilities
and there was a worry that this might lead to a performance cost for
some highly parallel workloads.
This reverts commit 66b96e2a591d8e3d60e74af3671344dfe4061cf2.
- - - - -
36eed985 by Cheng Shao at 2026-03-26T03:57:03-04:00
ghc-boot: move GHC.Data.SmallArray to ghc-boot
This commit moves `GHC.Data.SmallArray` from the `ghc` library to
`ghc-boot`, so that it can be used by `ghci` as well:
- The `Binary` (from `ghc`) instance of `SmallArray` is moved to
`GHC.Utils.Binary`
- Util functions `replicateSmallArrayIO`, `mapSmallArrayIO`,
`mapSmallArrayM_`, `imapSmallArrayM_` , `smallArrayFromList` and
`smallArrayToList` are added
- The `Show` instance is added
- The `Binary` (from `binary`) instance is added
- - - - -
fdf828ae by Cheng Shao at 2026-03-26T03:57:03-04:00
compiler: use `Binary` instance of `BCOByteArray` for bytecode objects
This commit defines `Binary` (from `compiler`) instance of
`BCOByteArray` which serializes the underlying buffer directly, and
uses it directly in bytecode object serialization. Previously we reuse
the `Binary` (from `binary`) instance, and this change allows us to
avoid double-copying via an intermediate `ByteString` when using
`put`/`get` in `binnary`. Also see added comment for explanation.
- - - - -
3bf62d0a by Cheng Shao at 2026-03-26T03:57:03-04:00
ghci: use SmallArray directly in ResolvedBCO
This patch makes ghci use `SmallArray` directly in `ResolvedBCO` when
applicable, making the memory representation more compact and reducing
marshaling overhead. Closes #27058.
- - - - -
3d6492ce by Wen Kokke at 2026-03-26T03:57:53-04:00
Fix race condition between flushEventLog and start/endEventLogging.
This commit changes `flushEventLog` to acquire/release the `state_change` mutex to prevent interleaving with `startEventLogging` and `endEventLogging`. In the current RTS, `flushEventLog` _does not_ acquire this mutex, which may lead to eventlog corruption on the following interleaving:
- `startEventLogging` writes the new `EventLogWriter` to `event_log_writer`.
- `flushEventLog` flushes some events to `event_log_writer`.
- `startEventLogging` writes the eventlog header to `event_log_writer`.
This causes the eventlog to be written out in an unreadable state, with one or more events preceding the eventlog header.
This commit renames the old function to `flushEventLog_` and defines `flushEventLog` simply as:
```c
void flushEventLog(Capability **cap USED_IF_THREADS)
{
ACQUIRE_LOCK(&state_change_mutex);
flushEventLog_(cap);
RELEASE_LOCK(&state_change_mutex);
}
```
The old function is still needed internally within the compilation unit, where it is used in `endEventLogging` in a context where the `state_change` mutex has already been acquired. I've chosen to mark `flushEventLog_` as static and let other uses of `flushEventLog` within the RTS refer to the new version. There is one use in `hs_init_ghc` via `flushTrace`, where the new locking behaviour should be harmless, and one use in `handle_tick`, which I believe was likely vulnerable to the same race condition, so the new locking behaviour is desirable.
I have not added a test. The behaviour is highly non-deterministic and requires a program that concurrently calls `flushEventLog` and `startEventLogging`/`endEventLogging`. I encountered the issue while developing `eventlog-socket` and within that context have verified that my patch likely addresses the issue: a test that used to fail within the first dozen or so runs now has been running on repeat for several hours.
- - - - -
7b9a75f0 by Phil Hazelden at 2026-03-26T03:58:37-04:00
Fix build with werror on glibc 2.43.
We've been defining `_XOPEN_SOURCE` and `_POSIX_C_SOURCE` to the same
values as defined in glibc prior to 2.43. But in 2.43, glibc changes
them to new values, which means we get a warning when redefining them.
By `#undef`ing them first, we no longer get a warning.
Closes #27076.
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fe6e76c5 by Tobias Haslop at 2026-03-26T03:59:30-04:00
Fix broken Haddock link to Bifunctor class in description of Functor class
- - - - -
404b71c1 by Luite Stegeman at 2026-03-27T04:40:49-04:00
Fix assert in Interpreter.c
If we skip exactly the number of words on the stack we end up on
the first word in the next chunk.
- - - - -
a85bd503 by Luite Stegeman at 2026-03-27T04:40:49-04:00
Support arbitrary size unboxed tuples in bytecode
This stores the size (number of words on the stack) of the next
expected tuple in the TSO, ctoi_spill_size field, eliminating
the need of stg_ctoi_tN frames for each size.
Note: On 32 bit platform there is still a bytecode tuple size
limit of 255 words on the stack.
Fixes #26946
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e2209031 by Luite Stegeman at 2026-03-27T04:40:49-04:00
Add specialized frames for small tuples
Small tuples are now returned more efficiently to the interpreter.
They use one less word of stack space and don't need manipulation
of the TSO anymore.
- - - - -
b26bb2ea by VeryMilkyJoe at 2026-03-27T04:41:38-04:00
Remove backwards compatibility pattern synonym `ModLocation`
Fixes #24932
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66e5e324 by Vladislav Zavialov at 2026-03-27T04:42:25-04:00
Extend HsExpr with the StarIsType syntax (#26587, #26967)
This patch allows kinds of the form `k -> *` and `* -> k` to occur in
expression syntax, i.e. to be used as required type arguments.
For example:
{-# LANGUAGE RequiredTypeArguments, StarIsType #-}
x1 = f (* -> * -> *)
x2 = f (forall k. k -> *)
x3 = f ((* -> *) -> Constraint)
Summary of the changes:
* Introduce the HsStar constructor of HsExpr and its extension field XStar.
It is analogous to HsStarTy in HsType.
* Refactor HsStarTy to store the unicode flag as TokStar, defined as
type TokStar = EpUniToken "*" "★" -- similar to TokForall, TokRArrow, etc.
The token is stored in the extension field and replaces the Bool field.
* Extend the `infixexp2` nonterminal to parse `*` as a direct argument of `->`.
This is more limited than the full StarIsType syntax, but has the nice
property of not conflicting with the multiplication operator `a * b`.
Test case: T26967 T26967_tyop
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f8de456f by Sylvain Henry at 2026-03-27T04:43:22-04:00
STM: don't create a transaction in the rhs of catchRetry# (#26028)
We don't need to create a transaction for the rhs of (catchRetry#)
because contrary to the lhs we don't need to abort it on retry. Moreover
it is particularly harmful if we have code such as (#26028):
let cN = readTVar vN >> retry
tree = c1 `orElse` (c2 `orElse` (c3 `orElse` ...))
atomically tree
Because it will stack transactions for the rhss and the read-sets of all
the transactions will be iteratively merged in O(n^2) after the
execution of the most nested retry.
This is the second attempt at implementing this. The first attempt
triggered segfaults (#26291) and has been reverted.
Co-Authored-By: Claude Sonnet 4.6 <noreply(a)anthropic.com>
- - - - -
fcf092dd by Luite Stegeman at 2026-03-27T04:44:17-04:00
Windows: remove StgAsyncIOResult and fix crash/leaks
In stg_block_async{_void}, a stack slot was reserved for
an StgAsyncIOResult. This slot would be filled by the IO
manager upon completion of the async call.
However, if the blocked thread was interrupted by an async
exception, we would end up in an invalid state:
- If the blocked computation was never re-entered, the
StgAsyncIOResult would never be freed.
- If the blocked computation was re-entered, the thread would
find an unitialized stack slot for the StgAsyncIOResult,
leading to a crash reading its fields, or freeing the pointer.
We fix this by removing the StgAsyncIOResult altogether and writing
the result directly to the stack.
Fixes #26341
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05094993 by Luite Stegeman at 2026-03-27T04:45:12-04:00
Don't refine DEFAULT alt for unary typeclasses
A non-DEFAULT data alt for a unary typeclass dictionary would
interfere with Unary Class Magic, leading to segfaults.
fixes #27071
- - - - -
4ee260cf by sheaf at 2026-03-27T04:46:06-04:00
Fix several oversights in hsExprType
This commit fixes several oversights in GHC.Hs.Syn.Type.hsExprType:
- The 'RecordCon' case was returning the type of the constructor,
instead of the constructor application. This is fixed by using
'splitFunTys'.
- The 'ExplicitTuple' case failed to take into account tuple sections,
and was also incorrectly handling 1-tuples (e.g. 'Solo') which can
be constructed using Template Haskell.
- The 'NegApp' case was returning the type of the negation operator,
again failing to apply it to the argument. Fixed by using
'funResultTy'.
- The 'HsProc' case was computing the result type of the arrow proc
block, without taking into account the argument type. Fix that by
adding a new field to 'CmdTopTc' that stores the arrow type, so that
we can construct the correct result type `arr a b` for
`proc (pat :: a) -> (cmd :: b)`.
- The 'ArithSeq' and 'NegApp' cases were failing to take into account
the result 'HsWrapper', which could e.g. silently drop casts.
This is fixed by introducing 'syntaxExpr_wrappedFunResTy' which, on
top of taking the result type, applies the result 'HsWrapper'.
These fixes are validated by the new GHC API test T26910.
Fixes #26910
- - - - -
e97232ce by Hai at 2026-03-27T04:47:04-04:00
Parser.y: avoid looking at token with QualifiedDo
This changes the behavior of 'hintQualifiedDo' so that the supplied
token is not inspected when the QualifiedDo language extension bit is
set.
- - - - -
9831385b by Vladislav Zavialov at 2026-03-27T17:22:30-04:00
Infix holes in types (#11107)
This patch introduces several improvements that follow naturally from
refactoring HsOpTy to represent the operator as an HsType, aligning it
with the approach taken by OpApp and HsExpr.
User-facing changes:
1. Infix holes (t1 `_` t2) are now permitted in types, following the
precedent set by term-level expressions.
Test case: T11107
2. Error messages for illegal promotion ticks are now reported at more
precise source locations.
Test case: T17865
Internal changes:
* The definition of HsOpTy now mirrors that of OpApp:
| HsOpTy (XOpTy p) (LHsType p) (LHsType p) (LHsType p)
| OpApp (XOpApp p) (LHsExpr p) (LHsExpr p) (LHsExpr p)
This moves us one step closer to unifying HsType and HsExpr.
* Ignoring locations,
the old pattern match (HsOpTy x prom lhs op rhs)
is now written as (HsOpTy x lhs (HsTyVar x' prom op) rhs)
but we also handle (HsOpTy x lhs (HsWildCardTy x') rhs)
Constructors other than HsTyVar and HsWildCardTy never appear
in the operator position.
* The various definitions across the compiler have been updated to work
with the new representation, drawing inspiration from the term-level
pipeline where appropriate. For example,
ppr_infix_ty <=> ppr_infix_expr
get_tyop <=> get_op
lookupTypeFixityRn <=> lookupExprFixityRn
(the latter is factored out from rnExpr)
Test cases: T11107 T17865
- - - - -
5b6757d7 by mangoiv at 2026-03-27T17:23:19-04:00
ci: build i386 non-validate for deb12
This is a small fix that will unlock ghcup metadata to run, i386 debian
12 was missing as a job.
- - - - -
cf942119 by Cheng Shao at 2026-03-30T15:24:37-04:00
ghc-boot: remove unused SizedSeq instances and functions
This commit removes unused `SizedSeq` instances and functions, only
keeping the bits we need for hpc tick sequence for now.
- - - - -
22c5b7cc by Cheng Shao at 2026-03-30T15:24:38-04:00
ghci: remove unused GHCi.BinaryArray
This patch removes the unused `GHCi.BinaryArray` module from `ghci`.
Closes #27108.
- - - - -
77abb4ab by Cheng Shao at 2026-03-30T15:25:21-04:00
testsuite: mark T17912 as fragile on Windows
T17912 is still fragile on Windows, it sometimes unexpectedly pass in
CI. This especially strains our already scarce Windows CI runner
resources. Mark it as fragile on Windows for the time being.
- - - - -
d741a6cc by Andreas Klebinger at 2026-03-31T04:39:33-04:00
Bump minimum shake version for hadrian.
We also add the shake version we want to stack.yaml
Fixes #26884
- - - - -
5e556f9e by Vladislav Zavialov at 2026-03-31T04:40:16-04:00
Status check for the HsType~HsExpr refactoring (#25121)
Add a test case to track the status of a refactoring project within GHC
whose goal is to arrive at the following declaration:
type HsType = HsExpr
The rationale for this is to increase code reuse between the term- and
type-level code in the compiler front-end (AST, parser, renamer, type checker).
The status report is saved to testsuite/tests/ghc-api/T25121_status.stdout
and provides useful insights into what needs to happen to make progress on
the ticket.
- - - - -
acffb1b1 by fendor at 2026-03-31T04:41:02-04:00
Extract Binary instances to `GHC.ByteCode.Binary`
- - - - -
e2ea8e25 by fendor at 2026-03-31T04:41:02-04:00
Add `seqNonEmpty` for evaluating `NonEmpty a`
- - - - -
048b00b7 by fendor at 2026-03-31T04:41:02-04:00
Record `LinkableUsage` instead of `Linkable` in `LoaderState`
Retaining a ByteCode `Linkable` after it has been loaded retains its
`UnlinkedBCO`, keeping it alive for the remainder of the program.
This starts accumulating a lot of `UnlinkedBCO` and memory over time.
However, the `Linkable` is merely used to later record its usage in
`mkObjectUsage`, which is used for recompilation checking.
However, this is incorrect, as the interface file and bytecode objects
could be in different states, e.g. the interface changes, but the
bytecode library hasn't changed so we don't need to recompile and vice
versa.
By computing a `Fingerprint` for the `ModuleByteCode`, and recording it
in the `LinkableUsage`, we know precisely whether the `ByteCode` object
on disk is outdated.
Thus, parts of this commit just makes sure that we efficiently compute a
`Fingerprint` for `ModuleByteCode` and store it in the on-disk
representation of `ModuleByteCode`.
We change the `LoaderState` to retain `LinkableUsage`, which is smaller
representation of a `Linkable`. This allows us to free the unneeded
fields of `Linkable` after linking them.
We declare the following memory invariants that this commit implements:
* No `LinkablePart` should be retained from `LoaderState`.
* `Linkable`s should be unloaded after they have been loaded.
These invariants are unfortunately tricky to automatically uphold, so we
are simply documenting our assumptions for now.
We introduce the `linkable-space` test which makes sure that after
loading, no `DotGBC` or `UnlinkedBCO` is retained.
-------------------------
Metric Increase:
MultiLayerModulesTH_OneShot
-------------------------
We allocate a bit more, but the peak number of bytes doesn't change.
While a bit unfortunate, accepting the metric increase.
We add multiple new performance measurements where we were able to
observe the desired memory invariants. Further, we add regression tests
to validate that the recompilation checker behaves more correct than
before.
- - - - -
2d1c1997 by Simon Jakobi at 2026-03-31T04:41:46-04:00
Eliminate dictionary-passing in ListMap operations
Mark the ListMap helpers 'INLINABLE' so importing modules can specialise
the 'TrieMap (ListMap m)' methods and avoid recursive dictionary-passing.
See Note [Making ListMap operations specialisable].
Fixes #27097
- - - - -
ed2c6570 by Cheng Shao at 2026-03-31T04:42:33-04:00
testsuite: fix testdir cleanup logic on Windows
testdir cleanup is unreliable on Windows (#13162) and despite existing
hacks in the driver, new failure mode has occurred. This patch makes
it print the warning and carry on when failed to clean up a testdir,
instead of reporting a spurious framework failure. See added comment
for detailed explanation.
- - - - -
d9388e29 by Simon Jakobi at 2026-03-31T13:14:59-04:00
Add regression test for #18177
Closes #18177.
Assisted-by: Codex
- - - - -
6a10045c by mangoiv at 2026-03-31T13:15:43-04:00
ci: allow metric decrease for two tests on i386
There has been a nightly failure on i386 due to a compiler runtime
improvement on i386 debian 12. We allow that.
Metric Decrease (test_env='i386-linux-deb12'):
T12707 T8095
- - - - -
7fbb4fcb by Rodrigo Mesquita at 2026-04-01T12:16:33+00:00
Bump default language edition to GHC2024
As per the accepted ghc-proposal#632
Fixes #26039
- - - - -
5ae43275 by Peng Fan at 2026-04-01T19:01:06-04:00
NCG/LA64: add cmpxchg and xchg primops
And append some new instructions for LA664 uarch.
Apply fix to cmpxchg-prim by Andreas Klebinger.
Suggestions in https://gitlab.haskell.org/ghc/ghc/-/merge_requests/15515
- - - - -
8f95534a by Duncan Coutts at 2026-04-01T19:01:52-04:00
Remove signal-based ticker implementations
Fixes issue #27073
All supported platforms should work with the pthreads + nanosleep based
ticker implementation. This avoids all the problems with using signals.
In practice, all supported platforms were probably using the non-signal
tickers already, which is probably why we do not get lots of reports
about deadlocks and other weirdness: we were definately using functions
that are not async signal safe in the tick handler (such as fflush to
flussh the eventlog).
Only Solaris was explicitly using the timer_create ticker impl, and even
Solaris could probably use the pthreads one (if anyone cared: Solaris is
no longer a Teir 3 supported platform).
Plausibly the only supported platform that this will change will be AIX,
which should now use the pthreads impl.
- - - - -
51b32b0d by Duncan Coutts at 2026-04-01T19:01:52-04:00
Tidy up some timer/ticker comments elsewhere
- - - - -
7562bcd7 by Duncan Coutts at 2026-04-01T19:01:52-04:00
Remove now-unused install_vtalrm_handler
Support function used by both of the signal-based ticker
implementations.
- - - - -
6da127c7 by Duncan Coutts at 2026-04-01T19:01:52-04:00
No longer probe for timer_create in rts/configure
It was only used by the TimerCreate.c ticker impl.
- - - - -
3fd490fa by Duncan Coutts at 2026-04-01T19:01:53-04:00
Note that rtsTimerSignal is deprecated.
- - - - -
63099b0f by Simon Jakobi at 2026-04-01T19:02:39-04:00
Add perf test for #13960
Closes #13960.
- - - - -
58009c14 by Apoorv Ingle at 2026-04-02T09:51:24+01:00
Streamline expansions using HsExpansion (#25001)
Notes added [Error Context Stack] [Typechecking by expansion: overview]
Notes updated Note [Expanding HsDo with XXExprGhcRn] [tcApp: typechecking applications]
-------------------------
Metric Decrease:
T9020
-------------------------
There are 2 key changes:
1. `HsExpand` datatype mediates between expansions
2. Replace `ErrCtxtM` to a simpler `HsCtxt` that does not depend on a `TidyEnv`
This has some consequences detailed below:
1. `HsExpand` datatype mediates between expansions
* Simplifies the implementations of `tcExpr` to work on `XExpr`
* Removes `VACtxt` (and its associated `VAExpansion` and `VACall`) datatype, it is subsumed by simply a `SrcSpan`.
* Removes the function `addHeadCtxt` as it is now mearly setting a location
* The function `tcValArgs` does its own argument number management
* move `splitHsTypes` out of `tcApp`
* Removes special case of tcBody from `tcLambdaMatches`
* Removes special case of `dsExpr` for `ExpandedThingTc`
* Renames `tcMonoExpr` -> `tcMonoLExpr`, `tcMonoExprNC` -> `tcMonoLExpr`
* Renames `EValArg`, `EValArgQL` fields: `ea_ctxt` -> `ea_loc_span` and `eaql_ctx` -> `eaql_loc_span`
* Remove `PopErrCtxt` from `XXExprGhcRn`
* `fun_orig` in tcInstFun depends on the SrcSpan of the head of the application chain (similar to addArgCtxt)
- it references the application chain head if it is user located, or
uses the error context stack as a fallback if it's a generated
location
* Make a new variant `GeneratedSrcSpan` in `SrcSpan` for HIEAst Nodes
- Expressions wrapped around `GeneratedSrcSpan` are ignored and never added to the error context stack
- In Explicit list expansion `fromListN` is wrapped with a `GeneratedSrcSpan` with `GeneratedSrcSpanDetails` field to store the original srcspan
2. Replace `ErrCtxtM` to a simpler `HsCtxt` that does not depend on a `TidyEnv`
* Merge `HsThingRn` to `HsCtxt`
* Landmark Error messages are now just computed on the fly
* Make HsExpandedRn and HsExpandedTc payload a located HsExpr GhcRn
* `HsCtxt` are tidied and zonked at the end right before printing
Co-authored-by: simonpj <simon.peytonjones(a)gmail.com>
- - - - -
bc4b4487 by Zubin Duggal at 2026-04-03T14:22:27-04:00
driver: recognise .dyn_o as a valid object file to link if passed on the command line.
This allows plugins compiled with this suffix to run.
Fixes #24486
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5ebb9121 by Simon Jakobi at 2026-04-03T14:23:11-04:00
Add regression test for #16145
Closes #16145.
- - - - -
c1fc1c44 by Simon Peyton Jones at 2026-04-03T19:56:07-04:00
Refactor eta-expansion in Prep
The Prep pass does eta-expansion but I found cases where it was
doing bad things. So I refactored and simplified it quite a bit.
In the new design
* There is no distinction between `rhs` and `body`; in particular,
lambdas can now appear anywhere, rather than just as the RHS of
a let-binding.
* This change led to a significant simplification of Prep, and
a more straightforward explanation of eta-expansion. See the new
Note [Eta expansion]
* The consequences is that CoreToStg needs to handle naked lambdas.
This is very easy; but it does need a unique supply, which forces
some simple refactoring. Having a unique supply to hand is probably
a good thing anyway.
- - - - -
21beda2c by Simon Peyton Jones at 2026-04-03T19:56:07-04:00
Clarify Note [Interesting dictionary arguments]
Ticket #26831 ended up concluding that the code for
GHC.Core.Opt.Specialise.interestingDict was good, but the
commments were a bit inadequate.
This commit improves the comments slightly.
- - - - -
3eaac1f2 by Simon Peyton Jones at 2026-04-03T19:56:07-04:00
Make inlining a bit more eager for overloaded functions
If we have
f d = ... (class-op d x y) ...
we should be eager to inline `f`, because that may change the
higher order call (class-op d x y) into a call to a statically
known function.
See the discussion on #26831.
Even though this does a bit /more/ inlining, compile times
decrease by an average of 0.4%.
Compile time changes:
DsIncompleteRecSel3(normal) 431,786,104 -2.2%
ManyAlternatives(normal) 670,883,768 -1.6%
ManyConstructors(normal) 3,758,493,832 -2.6% GOOD
MultilineStringsPerf(normal) 29,900,576 -2.8%
T14052Type(ghci) 1,047,600,848 -1.2%
T17836(normal) 392,852,328 -5.2%
T18478(normal) 442,785,768 -1.4%
T21839c(normal) 341,536,992 -14.1% GOOD
T3064(normal) 174,086,152 +5.3% BAD
T5631(normal) 506,867,800 +1.0%
hard_hole_fits(normal) 209,530,736 -1.3%
info_table_map_perf(normal) 19,523,093,184 -1.2%
parsing001(normal) 377,810,528 -1.1%
pmcOrPats(normal) 60,075,264 -0.5%
geo. mean -0.4%
minimum -14.1%
maximum +5.3%
Runtime changes
haddock.Cabal(normal) 27,351,988,792 -0.7%
haddock.base(normal) 26,997,212,560 -0.6%
haddock.compiler(normal) 219,531,332,960 -1.0%
Metric Decrease:
LinkableUsage01
ManyConstructors
T17949
T21839c
T13035
TcPlugin_RewritePerf
hard_hole_fits
Metric Increase:
T3064
- - - - -
5cbc2c82 by Matthew Pickering at 2026-04-03T19:57:02-04:00
bytecode: Add magic header/version to bytecode files
In order to avoid confusing errors when using stale interface files (ie
from an older compiler version), we add a simple header/version check
like the one for interface files.
Fixes #27068
- - - - -
d95a1936 by fendor at 2026-04-03T19:57:02-04:00
Add constants for bytecode in-memory buffer size
Introduce a common constant for the default size of the .gbc and
.bytecodelib binary buffer.
The buffer is by default set to 1 MB.
- - - - -
b822c30a by mangoiv at 2026-04-03T19:57:49-04:00
testsuite: filter stderr for static001 on darwin
This reactivates the test on x86_64 darwin as this should have been done
long ago and ignores warnings emitted by ranlib on newer version of the
darwin toolchain since they are benign. (no symbols for stub libraries)
Fixes #27116
- - - - -
28ce1f8a by Andreas Klebinger at 2026-04-03T19:58:44-04:00
Give the Data instance for ModuleName a non-bottom toConstr implementation.
I've also taken the liberty to add Note [Data.Data instances for GHC AST Types]
describing some of the uses of Data.Data I could find.
Fixes #27129
- - - - -
8ca41ffe by mangoiv at 2026-04-03T19:59:30-04:00
issue template: fix add bug label
- - - - -
3981db0c by Sylvain Henry at 2026-04-03T20:00:33-04:00
Add more canned GC functions for common register patterns (#27142)
Based on analysis of heap-check sites across the GHC compiler and Cabal,
the following patterns were not covered by existing canned GC functions
but occurred frequently enough to warrant specialisation:
stg_gc_ppppp -- 5 GC pointers
stg_gc_ip -- unboxed word + GC pointer
stg_gc_pi -- GC pointer + unboxed word
stg_gc_ii -- two unboxed words
stg_gc_bpp -- byte (I8) + two GC pointers
Adding these reduces the fraction of heap-check sites falling back to
the generic GC path from ~1.4% to ~0.4% when compiling GHC itself.
Co-Authored-By: Claude Sonnet 4.6 <noreply(a)anthropic.com>
- - - - -
d17d1435 by Matthew Pickering at 2026-04-03T20:01:19-04:00
Make home unit dependencies stored as sets
Co-authored-by: Wolfgang Jeltsch <wolfgang(a)well-typed.com>
- - - - -
92a97015 by Simon Peyton Jones at 2026-04-05T00:58:57+01:00
Add Invariant (NoTypeShadowing) to Core
This commit addresses #26868, by adding
a new invariant (NoTypeShadowing) to Core.
See Note [No type-shadowing in Core] in GHC.Core
- - - - -
8b5a5020 by Simon Peyton Jones at 2026-04-05T00:58:57+01:00
Major refactor of free-variable functions
For some time we have had two free-variable mechanims for types:
* The "FV" mechanism, embodied in GHC.Utils.FV, which worked OK, but
was fragile where eta-expansion was concerned.
* The TyCoFolder mechanism, using a one-shot EndoOS accumulator
I finally got tired of this and refactored the whole thing, thereby
addressing #27080. Now we have
* `GHC.Types.Var.FV`, which has a composable free-variable result type,
very much in the spirit of the old `FV`, but much more robust.
(It uses the "one shot trick".)
* GHC.Core.TyCo.FVs now has just one technology for free variables.
All this led to a lot of renaming.
There are couple of error-message changes. The change in T18451
makes an already-poor error message even more mysterious. But
it really needs a separate look.
We also now traverse the AST in a different order leading to a different
but still deterministic order for FVs and test output has been adjusted
accordingly.
- - - - -
4bf040c6 by sheaf at 2026-04-05T14:56:29-04:00
Add utility pprTrace_ function
This function is useful for quick debugging, as it can be added to a
where clause to pretty-print debugging information:
fooBar x y
| cond = body1
| otherwise = body2
where
!_ = pprTrace_ "fooBar" $
vcat [ text "x:" <+> ppr x
, text "y:" <+> ppr y
, text "cond:" <+> ppr cond
]
- - - - -
502e6ffe by Andrew Lelechenko at 2026-04-07T04:47:21-04:00
base: improve error message for Data.Char.chr
As per https://github.com/haskell/core-libraries-committee/issues/384
- - - - -
b21bd52e by Simon Peyton Jones at 2026-04-07T04:48:07-04:00
Refactor FunResCtxt a bit
Fixes #27154
- - - - -
7fe84ea5 by Zubin Duggal at 2026-04-07T19:11:52+05:30
compiler: Warn when -finfo-table-map is used with -fllvm
These are currently not supported together.
Fixes #26435
- - - - -
4a45a7da by Matthew Pickering at 2026-04-08T04:37:29-04:00
packaging: correctly propagate build/host/target to bindist configure script
At the moment the host and target which we will produce a compiler for
is fixed at the initial configure time. Therefore we need to persist
the choice made at this time into the installation bindist as well so we
look for the right tools, with the right prefixes at install time.
In the future, we want to provide a bit more control about what kind of
bindist we produce so the logic about what the host/target will have to
be written by hadrian rather than persisted by the configure script. In
particular with cross compilers we want to either build a normal stage 2
cross bindist or a stage 3 bindist, which creates a bindist which has a
native compiler for the target platform.
Fixes #21970
Co-authored-by: Sven Tennie <sven.tennie(a)gmail.com>
- - - - -
b0950df6 by Sven Tennie at 2026-04-08T04:37:29-04:00
Cross --host and --target no longer required for cross (#21970)
We set sane defaults in the configure script. Thus, these paramenters
aren't required any longer.
- - - - -
fef35216 by Sven Tennie at 2026-04-08T04:37:30-04:00
ci: Define USER_CONF_CC_OPTS_STAGE2 for aarch64/mingw
ghc-toolchain doesn't see $CONF_CC_OPTS_STAGE2 when the bindist gets
configured. So, the hack to override the compiler gets lost.
- - - - -
8dd6f453 by Cheng Shao at 2026-04-08T04:38:11-04:00
ghci: use ShortByteString for LookupSymbol/LookupSymbolInDLL/LookupClosure messages
This patch refactors ghci to use `ShortByteString` for
`LookupSymbol`/`LookupSymbolInDLL`/`LookupClosure` messages as the
first part of #27147.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
371ef200 by Cheng Shao at 2026-04-08T04:38:11-04:00
ghci: use ShortByteString for MkCostCentres message
This patch refactors ghci to use `ShortByteString` for `MkCostCentres`
messages as a first part of #27147. This also considerably lowers the
memory overhead of breakpoints when cost center profiling is enabled.
-------------------------
Metric Decrease:
interpreter_steplocal
-------------------------
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
4a122bb6 by Phil Hazelden at 2026-04-08T20:49:42-04:00
Implement modifiers syntax.
The `%m` syntax of linear types is now accepted in more places, to allow
use by future extensions, though so far linear types is still the only
consumer.
This may break existing code where it
* Uses -XLinearTypes.
* Has code of the form `a %m -> b`, where `m` can't be inferred to be
kind Multiplicity.
The code can be fixed either by adding a kind annotation, or by setting
`-XLinearTypes -XNoModifiers`.
Proposal:
https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0370-m…
- - - - -
07267f79 by Zubin Duggal at 2026-04-08T20:50:25-04:00
hadrian: Don't include the package hash in the haddock directory
Since GHC 9.8 and hash_unit_ids, haddock urls have looked like`ghc-9.10.3/doc/html/libraries/base-4.20.2.0-39f9/**/*.html`
The inclusion of the hash makes it hard for downstream non-boot packages to properly link to these files, as the hash is not
part of a standard cabal substitution.
Since we only build one version of each package, we don't need the hash to disambiguate anything, we can just remove it.
Fixes #26635
- - - - -
0a83b95b by ARATA Mizuki at 2026-04-08T20:51:18-04:00
testsuite: Allow multiple ways to be run by setting multiple command-line options
This patch allows multiple `--test-way`s to take effect, like:
$ hadrian/build test --test-way=normal --test-way=llvm
Previously, only one way was run if the test speed was 'normal' or 'fast'.
Closes #26926
Co-authored-by: sheaf <sam.derbyshire(a)gmail.com>
- - - - -
e841931c by Teo Camarasu at 2026-04-08T20:52:00-04:00
doc: improve eventlog-flush-interval flag documentation
We mention the performance cost and how this flag can be turned off.
Resolves #27056
- - - - -
e332db25 by Teo Camarasu at 2026-04-08T20:52:01-04:00
docs/user_guide: fix typo
- - - - -
5b82080a by Simon Jakobi at 2026-04-08T20:52:44-04:00
Fix -dsuppress-uniques for free variables in demand signatures
Before: Str=b{sXyZ->S}
With this patch: Str=b{S}
T13143.stderr is updated accordingly.
Fixes #27106.
- - - - -
b7a084cc by Simon Jakobi at 2026-04-08T20:53:27-04:00
Documentation fixes for demand signature notation
Fixes #27115.
- - - - -
59391132 by Simon Jakobi at 2026-04-08T20:54:08-04:00
Use upsert for non-deleting map updates
Some compiler functions were using `alter`, despite never removing
any entries: they only update an existing entry or insert a new one.
These functions are converted to using `upsert`:
alter :: (Maybe a -> Maybe a) -> Key -> Map a -> Map a
upsert :: (Maybe a -> a) -> Key -> Map a -> Map a
`upsert` variants are also added to APIs of the various Word64Map
wrapper types.
The precedent for this `upsert` operation is in the containers library:
see https://github.com/haskell/containers/pull/1145
Metrics: compile_time/bytes allocated
-------------------------------------
geo. mean: -0.1%
minimum: -0.5%
maximum: +0.0%
Resolves #27140.
- - - - -
da7e82f4 by Cheng Shao at 2026-04-08T20:54:49-04:00
testsuite: fix testsuite run for +ipe again
This patch makes the +ipe flavour transformer pass the entire
testsuite again by dropping stdout/stderr checks of certain tests that
are sensitive to stack layout changes with `+ipe`. Related: #26799.
- - - - -
b135a87d by Zubin Duggal at 2026-04-09T19:36:50+05:30
Bump directory submodule to 1.3.11.0 (unreleased)
- - - - -
3a291d07 by Zubin Duggal at 2026-04-09T19:36:50+05:30
Bump file-io submodule to 0.2.0
- - - - -
e0ab606d by Zubin Duggal at 2026-04-10T18:40:20+05:30
Release notes for GHC 10.0
- - - - -
e08b9b34 by Zubin Duggal at 2026-04-10T18:40:20+05:30
Bump ghc-prim version to 0.14.0
- - - - -
a92aac6e by Zubin Duggal at 2026-04-10T18:40:20+05:30
Bump template-haskell to 2.25.0.0; update submodule exceptions for TH 2.25
- - - - -
f254d9e8 by Zubin Duggal at 2026-04-10T18:40:20+05:30
Bump GHC version to 10.0
- - - - -
6ce0368a by Zubin Duggal at 2026-04-10T18:40:28+05:30
Bump base to 4.23.0.0; update submodules for base 4.24 upper bound
- - - - -
702fb8a5 by Zubin Duggal at 2026-04-10T18:40:28+05:30
Bump GHC version to 10.1; update submodules template-haskell-lift and template-haskell-quasiquoter for ghc-internal 10.200
- - - - -
75df1ca4 by Zubin Duggal at 2026-04-10T18:40:28+05:30
Use changelog.d for release notes (#26002)
GHC now uses a fragment-based changelog workflow using a custom script adapted from https://codeberg.org/fgaz/changelog-d.
Contributors add a file in changelog.d/ for each user-facing change.
At release time, these are assembled into release notes for sphinx (in RST) format, using
the tool.
New hadrian `changelog` target to generate changelogs
CI job to validate changelog entries for MRs unless skipped with ~"no-changelog" label
Teach sphinx about ghc-mr: extlink to link to MRs
Remove `ghc-package-list` from sphinx, and implement it in changelog-d instead (Fixes #26476).
(cherry picked from commit 989c07249978f418dfde1353abfad453f024d61a)
- - - - -
585d7450 by Luite Stegeman at 2026-04-11T02:17:13-04:00
tc: discard warnings in tcUserStmt Plan C
We typecheck let_stmt twice, but we don't want the warnings twice!
see #26233
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2df604e9 by Sylvain Henry at 2026-04-11T02:19:30-04:00
Introduce TargetInt to represent target's Int (#15973)
GHC was using host 'Int' in several places to represent values that
live in the target machine's 'Int' type. This is silently wrong when
cross-compiling from a 32-bit host to a 64-bit target: the host Int
is 32 bits while the target Int is 64 bits.
See Note [TargetInt] in GHC.Platform.
Also used the opportunity to make DynTag = Word8.
Fixes #15973
Co-Authored-By: Claude Sonnet 4.6 <noreply(a)anthropic.com>
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d419e972 by Luite Stegeman at 2026-04-13T15:16:04-04:00
Suppress desugaring warnings in the pattern match checker
Avoid duplicating warnings from the actual desugaring pass.
fixes #25996
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c5b80dd0 by Phil de Joux at 2026-04-13T15:16:51-04:00
Typo ~/ghc/arch-os-version/environments
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71462fff by Luite Stegeman at 2026-04-13T15:17:38-04:00
add changelog entry for #26233
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d1ddfd4b by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
Add test for #25636
The existing test behaviour of "T23146_liftedeq" changed because the
simplifier now does a bit more inlining. We can restore the previous bad
behavior by using an OPAQUE pragma.
This test doubles as a test for #25636 when run in ghci, so we add it as
such.
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b9df40ee by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
refactor: protoBCOName is always a Name
Simplifies the code by removing the unnecessary type argument to
ProtoBCO which was always 'Name'
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5c2a179e by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
Allocate static constructors for bytecode
This commit adds support for static constructors when compiling and
linking ByteCode objects.
Top-level StgRhsCon get lowered to ProtoStaticCons rather than to
ProtoBCOs. A ProtoStaticCon gets allocated directly as a data con
application on the heap (using the new primop newConApp#).
Previously, we would allocate a ProtoBCO which, when evaluated, would
PACK and return the constructor.
A few more details are given in Note [Static constructors in Bytecode].
Secondly, this commit also fixes issue #25636 which was caused by
linking *unlifted* constructors in BCO instructions as
- (1) a thunk indexing the array of BCOs in a module
- (2) which evaluated to a BCO which still had to be evaluated to
return the unlifted constructor proper.
The (2) issue has been resolved by allocating the static constructors
directly. The (1) issue can be resolved by ensuring that we allocate all
unlifted top-level constructors eagerly, and leave the knot-tying for
the lifted BCOs and top-level constructors only.
The top-level unlifted constructors are never mutually recursive, so we
can allocate them all in one go as long as we do it in topological
order. Lifted fields of unlifted constructors can still be filled by the
knot-tied lifted variables since in those fields it is fine to keep
those thunks. See Note [Tying the knot in createBCOs] for more details.
Fixes #25636
-------------------------
Metric Decrease:
LinkableUsage01
-------------------------
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cde47053 by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
Revert "StgToByteCode: Assert that PUSH_G'd values are lifted"
This reverts commit ec26c54d818e0cd328276196930313f66b780905.
Ever since f7a22c0f4e9ae0dc767115d4c53fddbd8372b777, we now do support
and will link top-level unlifted constructors into evaluated and
properly tagged values which we can reference with PUSH_G.
This assertion is no longer true and triggered a failure in T25636
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c7a7e5b8 by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
refactor: Tag more remote Ptrs as RemotePtr
Pure refactor which improves the API of
- GHC.ByteCode.Linker
- GHC.Runtime.Interpreter
- GHC.Runtime.Interpreter.Types.SymbolCache
by using `RemotePtr` for more functions which used to return `Ptr`s that
could potentially be in a foreign process. E.g. `lookupIE`,
`lookupStaticPtr`, etc...
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fc59494c by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
Add float# and subword tests for #25636
These tests cover that static constructors in bytecode work correctly
for Float# and subword values (Word8#, Word16#)
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477f521b by Rodrigo Mesquita at 2026-04-14T18:41:12-04:00
test: Validate topoSort logic in createBCOs
This test validates that the topological sorting and ordering of the
unlifted constructors and lifted constructors in `createBCOs` is
correct.
See `Note [Tying the knot in createBCOs]` for why tying the knot for the
created BCOs is slightly difficult and why the topological sorting is
necessary.
This test fails when `let topoSortedObjs = topSortObjs objs` is
substituted by `let topoSortedObjs = zip [0..] objs`, thus witnessing
the toposort logic is correct and necessary.
The test calls the ghci `createBCOs` directly because it is currently
impossible to construct in Source Haskell a situation where a top-level
static unlifted constructor depends on another (we don't have top-level
unlifted constructors except for nullary constructors like `Leaf ::
(UTree :: UnliftedType)`).
This is another test for fix for #25636
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2d9c30be by Simon Jakobi at 2026-04-14T18:42:00-04:00
Improve tests for `elem`
...in order to simplify the work on #27096.
* Improve T17752 by including the Core output in golden files, checking
both -O1 and -O2.
* Add tests for fusion and no-fusion cases.
Fixes #27101.
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34c99af1 by Richard Eisenberg at 2026-04-15T21:43:11-04:00
Teaching hadrian to --skip-test.
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1268 changed files:
- .gitlab-ci.yml
- .gitlab/ci.sh
- .gitlab/generate-ci/flake.lock
- .gitlab/generate-ci/gen_ci.hs
- .gitlab/issue_templates/default.md
- + .gitlab/issue_templates/release_tracking.md
- .gitlab/jobs.yaml
- .gitlab/merge_request_templates/Default.md
- .gitlab/rel_eng/fetch-gitlab-artifacts/fetch_gitlab.py
- .gitlab/rel_eng/mk-ghcup-metadata/mk_ghcup_metadata.py
- + changelog.d/T25636
- + changelog.d/changelog-entries
- + changelog.d/config
- + changelog.d/fix-duplicate-pmc-warnings
- + changelog.d/fix-ghci-duplicate-warnings-26233
- compiler/CodeGen.Platform.h
- compiler/GHC.hs
- compiler/GHC/Builtin/Names.hs
- compiler/GHC/Builtin/PrimOps.hs
- compiler/GHC/Builtin/primops.txt.pp
- compiler/GHC/ByteCode/Asm.hs
- + compiler/GHC/ByteCode/Binary.hs
- compiler/GHC/ByteCode/Breakpoints.hs
- compiler/GHC/ByteCode/InfoTable.hs
- compiler/GHC/ByteCode/Instr.hs
- compiler/GHC/ByteCode/Linker.hs
- + compiler/GHC/ByteCode/Recomp/Binary.hs
- compiler/GHC/ByteCode/Serialize.hs
- compiler/GHC/ByteCode/Types.hs
- compiler/GHC/Cmm/CommonBlockElim.hs
- compiler/GHC/Cmm/Dataflow/Graph.hs
- compiler/GHC/Cmm/Dataflow/Label.hs
- compiler/GHC/Cmm/Expr.hs
- compiler/GHC/Cmm/LayoutStack.hs
- compiler/GHC/Cmm/Liveness.hs
- compiler/GHC/Cmm/Node.hs
- compiler/GHC/Cmm/Opt.hs
- compiler/GHC/Cmm/Parser.y
- compiler/GHC/Cmm/Type.hs
- compiler/GHC/Cmm/Utils.hs
- compiler/GHC/CmmToAsm/AArch64/CodeGen.hs
- compiler/GHC/CmmToAsm/AArch64/Instr.hs
- compiler/GHC/CmmToAsm/AArch64/Ppr.hs
- compiler/GHC/CmmToAsm/AArch64/Regs.hs
- compiler/GHC/CmmToAsm/CFG.hs
- compiler/GHC/CmmToAsm/LA64/CodeGen.hs
- compiler/GHC/CmmToAsm/LA64/Instr.hs
- compiler/GHC/CmmToAsm/LA64/Ppr.hs
- compiler/GHC/CmmToAsm/LA64/Regs.hs
- compiler/GHC/CmmToAsm/PPC/CodeGen.hs
- compiler/GHC/CmmToAsm/PPC/Ppr.hs
- compiler/GHC/CmmToAsm/PPC/Regs.hs
- compiler/GHC/CmmToAsm/RV64/CodeGen.hs
- compiler/GHC/CmmToAsm/RV64/Ppr.hs
- compiler/GHC/CmmToAsm/RV64/Regs.hs
- compiler/GHC/CmmToAsm/Reg/Graph/TrivColorable.hs
- compiler/GHC/CmmToAsm/Wasm/FromCmm.hs
- compiler/GHC/CmmToAsm/X86/CodeGen.hs
- compiler/GHC/CmmToAsm/X86/Ppr.hs
- compiler/GHC/CmmToAsm/X86/Regs.hs
- compiler/GHC/CmmToC.hs
- compiler/GHC/CmmToLlvm.hs
- compiler/GHC/CmmToLlvm/CodeGen.hs
- compiler/GHC/CmmToLlvm/Config.hs
- compiler/GHC/CmmToLlvm/Data.hs
- compiler/GHC/CmmToLlvm/Mangler.hs
- compiler/GHC/Core.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/FVs.hs
- compiler/GHC/Core/Lint.hs
- compiler/GHC/Core/Make.hs
- compiler/GHC/Core/Multiplicity.hs
- compiler/GHC/Core/Opt/Arity.hs
- compiler/GHC/Core/Opt/ConstantFold.hs
- compiler/GHC/Core/Opt/DmdAnal.hs
- + compiler/GHC/Core/Opt/Range.hs
- compiler/GHC/Core/Opt/SetLevels.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Core/RoughMap.hs
- compiler/GHC/Core/Rules.hs
- compiler/GHC/Core/Subst.hs
- compiler/GHC/Core/Tidy.hs
- compiler/GHC/Core/TyCo/FVs.hs
- compiler/GHC/Core/TyCo/Ppr.hs
- compiler/GHC/Core/TyCo/Rep.hs
- compiler/GHC/Core/TyCo/Subst.hs
- compiler/GHC/Core/TyCon.hs
- compiler/GHC/Core/TyCon/Env.hs
- compiler/GHC/Core/Type.hs
- compiler/GHC/Core/Unfold.hs
- compiler/GHC/Core/Unify.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToStg.hs
- compiler/GHC/CoreToStg/AddImplicitBinds.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Data/FastString/Env.hs
- compiler/GHC/Data/TrieMap.hs
- compiler/GHC/Data/Word64Map/Internal.hs
- compiler/GHC/Data/Word64Map/Lazy.hs
- compiler/GHC/Data/Word64Map/Strict.hs
- compiler/GHC/Data/Word64Map/Strict/Internal.hs
- compiler/GHC/Driver/Config/CmmToLlvm.hs
- compiler/GHC/Driver/Config/StgToCmm.hs
- compiler/GHC/Driver/Downsweep.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Hooks.hs
- compiler/GHC/Driver/Main.hs
- compiler/GHC/Driver/Phases.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Plugins.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Binds.hs
- compiler/GHC/Hs/Decls.hs
- compiler/GHC/Hs/DocString.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/Expr.hs-boot
- compiler/GHC/Hs/Instances.hs
- compiler/GHC/Hs/Pat.hs
- compiler/GHC/Hs/Syn/Type.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/Hs/Utils.hs
- compiler/GHC/HsToCore/Arrows.hs
- compiler/GHC/HsToCore/Binds.hs
- compiler/GHC/HsToCore/Breakpoints.hs
- compiler/GHC/HsToCore/Docs.hs
- compiler/GHC/HsToCore/Errors/Ppr.hs
- compiler/GHC/HsToCore/Errors/Types.hs
- compiler/GHC/HsToCore/Expr.hs
- compiler/GHC/HsToCore/Foreign/C.hs
- compiler/GHC/HsToCore/Match.hs
- compiler/GHC/HsToCore/Match/Literal.hs
- compiler/GHC/HsToCore/Monad.hs
- compiler/GHC/HsToCore/Pmc.hs
- compiler/GHC/HsToCore/Pmc/Desugar.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/HsToCore/Ticks.hs
- compiler/GHC/HsToCore/Usage.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Iface/Ext/Utils.hs
- compiler/GHC/Iface/Recomp.hs
- compiler/GHC/Iface/Recomp/Types.hs
- compiler/GHC/Iface/Syntax.hs
- compiler/GHC/Iface/Type.hs
- compiler/GHC/Linker/ByteCode.hs
- compiler/GHC/Linker/Deps.hs
- compiler/GHC/Linker/Loader.hs
- compiler/GHC/Linker/Types.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Annotation.hs
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Errors/Types.hs
- compiler/GHC/Parser/HaddockLex.x
- compiler/GHC/Parser/Lexer.x
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Parser/PostProcess/Haddock.hs
- compiler/GHC/Parser/Types.hs
- compiler/GHC/Platform.hs
- + compiler/GHC/Platform/Tag.hs
- compiler/GHC/Prelude/Basic.hs
- compiler/GHC/Rename/Bind.hs
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Rename/Expr.hs
- compiler/GHC/Rename/Expr.hs-boot
- compiler/GHC/Rename/Fixity.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/Rename/Lit.hs
- compiler/GHC/Rename/Module.hs
- compiler/GHC/Rename/Names.hs
- compiler/GHC/Rename/Pat.hs
- compiler/GHC/Rename/Splice.hs
- compiler/GHC/Rename/Splice.hs-boot
- compiler/GHC/Rename/Utils.hs
- compiler/GHC/Runtime/Debugger/Breakpoints.hs
- compiler/GHC/Runtime/Interpreter.hs
- compiler/GHC/Runtime/Interpreter/Types/SymbolCache.hs
- compiler/GHC/Runtime/Loader.hs
- compiler/GHC/Stg/Lint.hs
- compiler/GHC/Stg/Unarise.hs
- compiler/GHC/StgToByteCode.hs
- compiler/GHC/StgToCmm.hs
- compiler/GHC/StgToCmm/Bind.hs
- compiler/GHC/StgToCmm/Closure.hs
- compiler/GHC/StgToCmm/DataCon.hs
- compiler/GHC/StgToCmm/Env.hs
- compiler/GHC/StgToCmm/Expr.hs
- compiler/GHC/StgToCmm/Foreign.hs
- compiler/GHC/StgToCmm/Heap.hs
- compiler/GHC/StgToCmm/InfoTableProv.hs
- compiler/GHC/StgToCmm/Layout.hs
- compiler/GHC/StgToCmm/Lit.hs
- compiler/GHC/StgToCmm/Prim.hs
- compiler/GHC/StgToCmm/Prof.hs
- compiler/GHC/StgToCmm/Ticky.hs
- compiler/GHC/StgToCmm/Utils.hs
- compiler/GHC/StgToJS/Literal.hs
- compiler/GHC/StgToJS/Prim.hs
- compiler/GHC/Tc/Deriv.hs
- compiler/GHC/Tc/Deriv/Generate.hs
- compiler/GHC/Tc/Deriv/Infer.hs
- compiler/GHC/Tc/Deriv/Utils.hs
- compiler/GHC/Tc/Errors.hs
- compiler/GHC/Tc/Errors/Hole.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Arrow.hs
- compiler/GHC/Tc/Gen/Bind.hs
- compiler/GHC/Tc/Gen/Default.hs
- compiler/GHC/Tc/Gen/Do.hs
- + compiler/GHC/Tc/Gen/Expand.hs
- compiler/GHC/Tc/Gen/Export.hs
- compiler/GHC/Tc/Gen/Expr.hs
- compiler/GHC/Tc/Gen/Expr.hs-boot
- compiler/GHC/Tc/Gen/Foreign.hs
- compiler/GHC/Tc/Gen/Head.hs
- compiler/GHC/Tc/Gen/HsType.hs
- compiler/GHC/Tc/Gen/Match.hs
- compiler/GHC/Tc/Gen/Match.hs-boot
- compiler/GHC/Tc/Gen/Pat.hs
- compiler/GHC/Tc/Gen/Sig.hs
- compiler/GHC/Tc/Gen/Splice.hs
- compiler/GHC/Tc/Instance/Class.hs
- compiler/GHC/Tc/Instance/Family.hs
- compiler/GHC/Tc/Instance/FunDeps.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Tc/Solver/Solve.hs
- compiler/GHC/Tc/Solver/Types.hs
- compiler/GHC/Tc/TyCl.hs
- compiler/GHC/Tc/TyCl/Build.hs
- compiler/GHC/Tc/TyCl/Class.hs
- compiler/GHC/Tc/TyCl/Instance.hs
- compiler/GHC/Tc/TyCl/PatSyn.hs
- compiler/GHC/Tc/TyCl/Utils.hs
- compiler/GHC/Tc/Types.hs
- compiler/GHC/Tc/Types/BasicTypes.hs
- compiler/GHC/Tc/Types/Constraint.hs
- compiler/GHC/Tc/Types/CtLoc.hs
- compiler/GHC/Tc/Types/ErrCtxt.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Types/LclEnv.hs
- compiler/GHC/Tc/Types/Origin.hs
- compiler/GHC/Tc/Types/Origin.hs-boot
- compiler/GHC/Tc/Utils/Env.hs
- compiler/GHC/Tc/Utils/Instantiate.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/Tc/Utils/TcType.hs
- compiler/GHC/Tc/Utils/TcType.hs-boot
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/Tc/Validity.hs
- compiler/GHC/Tc/Zonk/TcType.hs
- compiler/GHC/Tc/Zonk/Type.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/Demand.hs
- compiler/GHC/Types/Error.hs
- + compiler/GHC/Types/Error.hs-boot
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/Hint.hs
- compiler/GHC/Types/Hint/Ppr.hs
- compiler/GHC/Types/Id.hs
- compiler/GHC/Types/Id/Info.hs
- compiler/GHC/Types/Id/Make.hs
- compiler/GHC/Types/Literal.hs
- + compiler/GHC/Types/Literal/Floating.hs
- compiler/GHC/Types/Name/Env.hs
- compiler/GHC/Types/Name/Occurrence.hs
- compiler/GHC/Types/Name/Reader.hs
- compiler/GHC/Types/Name/Set.hs
- compiler/GHC/Types/RepType.hs
- compiler/GHC/Types/SrcLoc.hs
- compiler/GHC/Types/Unique/DFM.hs
- compiler/GHC/Types/Unique/FM.hs
- compiler/GHC/Types/Var/Env.hs
- + compiler/GHC/Types/Var/FV.hs
- compiler/GHC/Types/Var/Set.hs
- compiler/GHC/Unit/Finder.hs
- compiler/GHC/Unit/Home/Graph.hs
- compiler/GHC/Unit/Home/ModInfo.hs
- compiler/GHC/Unit/Module/Deps.hs
- compiler/GHC/Unit/Module/Location.hs
- compiler/GHC/Unit/Module/Status.hs
- compiler/GHC/Unit/State.hs
- + compiler/GHC/Unit/State.hs-boot
- compiler/GHC/Utils/Binary.hs
- compiler/GHC/Utils/EndoOS.hs
- − compiler/GHC/Utils/FV.hs
- compiler/GHC/Utils/Logger.hs
- compiler/GHC/Utils/Misc.hs
- compiler/GHC/Utils/Outputable.hs
- compiler/GHC/Utils/Trace.hs
- compiler/GHC/Wasm/ControlFlow/FromCmm.hs
- compiler/Language/Haskell/Syntax/Binds.hs
- compiler/Language/Haskell/Syntax/Decls.hs
- compiler/Language/Haskell/Syntax/Decls/Foreign.hs
- compiler/Language/Haskell/Syntax/Expr.hs
- compiler/Language/Haskell/Syntax/Extension.hs
- compiler/Language/Haskell/Syntax/Module/Name.hs
- compiler/Language/Haskell/Syntax/Pat.hs
- compiler/Language/Haskell/Syntax/Type.hs
- compiler/ghc.cabal.in
- configure.ac
- distrib/configure.ac.in
- − docs/users_guide/10.0.1-notes.rst
- + docs/users_guide/10.2.1-notes.rst
- − docs/users_guide/9.16.1-notes.rst
- docs/users_guide/conf.py
- docs/users_guide/debug-info.rst
- docs/users_guide/exts/control.rst
- docs/users_guide/exts/linear_types.rst
- + docs/users_guide/exts/modifiers.rst
- docs/users_guide/exts/required_type_arguments.rst
- docs/users_guide/exts/syntax.rst
- docs/users_guide/ghc_config.py.in
- − docs/users_guide/ghc_packages.py
- docs/users_guide/ghci.rst
- docs/users_guide/packages.rst
- docs/users_guide/release-notes.rst
- docs/users_guide/runtime_control.rst
- docs/users_guide/using-optimisation.rst
- docs/users_guide/using-warnings.rst
- docs/users_guide/utils.py
- ghc/GHCi/Leak.hs
- ghc/GHCi/UI.hs
- ghc/GHCi/UI/Info.hs
- ghc/Main.hs
- ghc/ghc-bin.cabal.in
- hadrian/bindist/Makefile
- hadrian/cabal.project
- hadrian/cfg/system.config.in
- hadrian/doc/make.md
- hadrian/doc/testsuite.md
- hadrian/hadrian.cabal
- hadrian/src/CommandLine.hs
- hadrian/src/Context.hs
- hadrian/src/Main.hs
- hadrian/src/Oracles/Setting.hs
- hadrian/src/Packages.hs
- + hadrian/src/Rules/Changelog.hs
- hadrian/src/Rules/Documentation.hs
- hadrian/src/Rules/Generate.hs
- hadrian/src/Rules/Test.hs
- hadrian/src/Settings/Builders/Cabal.hs
- hadrian/src/Settings/Builders/RunTest.hs
- hadrian/src/Settings/Default.hs
- hadrian/src/Settings/Flavours/GhcInGhci.hs
- hadrian/src/Settings/Flavours/Validate.hs
- hadrian/src/Settings/Packages.hs
- hadrian/stack.yaml
- libraries/array
- libraries/base/base.cabal.in
- libraries/base/changelog.md
- libraries/base/src/Control/Applicative.hs
- libraries/base/src/Data/Char.hs
- libraries/base/src/Data/Eq.hs
- libraries/base/src/Data/Semigroup.hs
- libraries/base/src/GHC/Base.hs
- libraries/base/src/GHC/Weak/Finalize.hs
- libraries/base/src/Prelude.hs
- libraries/base/tests/IO/all.T
- libraries/base/tests/enum01.stdout
- libraries/base/tests/enum01.stdout-alpha-dec-osf3
- libraries/base/tests/enum01.stdout-ws-64
- + libraries/base/tests/perf/ElemFusionUnknownList.hs
- + libraries/base/tests/perf/ElemFusionUnknownList_O1.stderr
- + libraries/base/tests/perf/ElemFusionUnknownList_O2.stderr
- + libraries/base/tests/perf/ElemNoFusion.hs
- + libraries/base/tests/perf/ElemNoFusion_O1.stderr
- + libraries/base/tests/perf/ElemNoFusion_O2.stderr
- − libraries/base/tests/perf/Makefile
- libraries/base/tests/perf/T17752.hs
- − libraries/base/tests/perf/T17752.stdout
- + libraries/base/tests/perf/T17752_O1.stderr
- + libraries/base/tests/perf/T17752_O2.stderr
- libraries/base/tests/perf/all.T
- libraries/deepseq
- libraries/directory
- libraries/exceptions
- libraries/file-io
- libraries/filepath
- libraries/ghc-boot-th/ghc-boot-th.cabal.in
- libraries/ghc-boot/GHC/Data/SizedSeq.hs
- compiler/GHC/Data/SmallArray.hs → libraries/ghc-boot/GHC/Data/SmallArray.hs
- libraries/ghc-boot/ghc-boot.cabal.in
- libraries/ghc-compact/ghc-compact.cabal
- libraries/ghc-experimental/ghc-experimental.cabal.in
- libraries/ghc-experimental/src/GHC/Profiling/Eras.hs
- + libraries/ghc-experimental/src/GHC/Stack/Decode/Experimental.hs
- libraries/ghc-experimental/tests/backtraces/all.T
- libraries/ghc-internal/codepages/MakeTable.hs
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/src/GHC/Internal/AllocationLimitHandler.hs
- libraries/ghc-internal/src/GHC/Internal/Arr.hs
- libraries/ghc-internal/src/GHC/Internal/Base.hs
- libraries/ghc-internal/src/GHC/Internal/Bits.hs
- libraries/ghc-internal/src/GHC/Internal/ByteOrder.hs
- − libraries/ghc-internal/src/GHC/Internal/ByteOrder.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Char.hs
- libraries/ghc-internal/src/GHC/Internal/Clock.hsc
- libraries/ghc-internal/src/GHC/Internal/ClosureTypes.hs
- libraries/ghc-internal/src/GHC/Internal/Conc/Bound.hs
- libraries/ghc-internal/src/GHC/Internal/Conc/IO.hs
- libraries/ghc-internal/src/GHC/Internal/Conc/POSIX.hs
- libraries/ghc-internal/src/GHC/Internal/Conc/Signal.hs
- libraries/ghc-internal/src/GHC/Internal/Conc/Sync.hs
- libraries/ghc-internal/src/GHC/Internal/Conc/Windows.hs
- libraries/ghc-internal/src/GHC/Internal/ConsoleHandler.hsc
- libraries/ghc-internal/src/GHC/Internal/Control/Arrow.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Concurrent/MVar.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Exception.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Exception/Base.hs
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- libraries/ghc-internal/src/GHC/Internal/Control/Monad/Fail.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/Fix.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/IO/Class.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/ST/Imp.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/ST/Lazy/Imp.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Bits.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Data.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Dynamic.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Either.hs
- − libraries/ghc-internal/src/GHC/Internal/Data/Eq.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Foldable.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Function.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor/Const.hs
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- libraries/ghc-internal/src/GHC/Internal/Data/List.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Maybe.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Monoid.hs
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- libraries/ghc-internal/src/GHC/Internal/Float/RealFracMethods.hs
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- libraries/ghc-internal/src/GHC/Internal/Stack.hs-boot
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- libraries/ghc-internal/src/GHC/Internal/Stack/Decode.hs
- libraries/ghc-internal/src/GHC/Internal/StaticPtr.hs
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- + testsuite/tests/typecheck/should_compile/T11505Foo.hs
- + testsuite/tests/typecheck/should_compile/T11505Foo.hs-boot
- + testsuite/tests/typecheck/should_compile/T12046.hs
- testsuite/tests/typecheck/should_compile/T13526.hs
- testsuite/tests/typecheck/should_compile/T14590.stderr
- testsuite/tests/typecheck/should_compile/T18467.hs
- testsuite/tests/typecheck/should_compile/T18467.stderr
- testsuite/tests/typecheck/should_compile/T25180.stderr
- testsuite/tests/typecheck/should_compile/T26225.hs
- testsuite/tests/typecheck/should_compile/all.T
- testsuite/tests/typecheck/should_compile/free_monad_hole_fits.stderr
- testsuite/tests/typecheck/should_compile/tc081.hs
- testsuite/tests/typecheck/should_compile/tc141.hs
- testsuite/tests/typecheck/should_compile/valid_hole_fits.stderr
- testsuite/tests/typecheck/should_fail/DoExpansion1.stderr
- testsuite/tests/typecheck/should_fail/DoExpansion2.stderr
- testsuite/tests/typecheck/should_fail/T10971d.stderr
- testsuite/tests/typecheck/should_fail/T12589.stderr
- testsuite/tests/typecheck/should_fail/T13311.stderr
- testsuite/tests/typecheck/should_fail/T17773.stderr
- testsuite/tests/typecheck/should_fail/T23427.hs
- + testsuite/tests/typecheck/should_fail/T26823.hs
- + testsuite/tests/typecheck/should_fail/T26823.stderr
- testsuite/tests/typecheck/should_fail/T2846b.stderr
- testsuite/tests/typecheck/should_fail/T3323.stderr
- testsuite/tests/typecheck/should_fail/T3613.stderr
- testsuite/tests/typecheck/should_fail/T6069.stderr
- testsuite/tests/typecheck/should_fail/T6078.hs
- testsuite/tests/typecheck/should_fail/T7453.hs
- testsuite/tests/typecheck/should_fail/T7453.stderr
- testsuite/tests/typecheck/should_fail/T7851.stderr
- testsuite/tests/typecheck/should_fail/T7857.stderr
- testsuite/tests/typecheck/should_fail/T8570.hs
- testsuite/tests/typecheck/should_fail/T8570.stderr
- testsuite/tests/typecheck/should_fail/T8603.stderr
- testsuite/tests/typecheck/should_fail/T9612.stderr
- testsuite/tests/typecheck/should_fail/all.T
- testsuite/tests/typecheck/should_fail/tcfail083.hs
- testsuite/tests/typecheck/should_fail/tcfail083.stderr
- testsuite/tests/typecheck/should_fail/tcfail084.hs
- testsuite/tests/typecheck/should_fail/tcfail084.stderr
- testsuite/tests/typecheck/should_fail/tcfail094.hs
- testsuite/tests/typecheck/should_fail/tcfail094.stderr
- testsuite/tests/typecheck/should_fail/tcfail102.stderr
- testsuite/tests/typecheck/should_fail/tcfail128.stderr
- testsuite/tests/typecheck/should_fail/tcfail140.stderr
- testsuite/tests/typecheck/should_fail/tcfail181.stderr
- testsuite/tests/typecheck/should_run/T1735.hs
- testsuite/tests/typecheck/should_run/T1735_Help/Basics.hs
- testsuite/tests/typecheck/should_run/T3731.hs
- + testsuite/tests/vdq-rta/should_compile/T26967.hs
- + testsuite/tests/vdq-rta/should_compile/T26967.stderr
- + testsuite/tests/vdq-rta/should_compile/T26967_tyop.hs
- + testsuite/tests/vdq-rta/should_compile/T26967_tyop.stderr
- testsuite/tests/vdq-rta/should_compile/all.T
- testsuite/tests/vdq-rta/should_fail/T24159_type_syntax_th_fail.script
- testsuite/tests/warnings/should_fail/CaretDiagnostics1.hs
- testsuite/tests/warnings/should_fail/CaretDiagnostics1.stderr
- testsuite/tests/warnings/should_fail/T24396c.hs
- testsuite/tests/warnings/should_fail/T24396c.stderr
- testsuite/tests/wasm/should_run/control-flow/LoadCmmGroup.hs
- + utils/changelog-d/ChangelogD.hs
- + utils/changelog-d/LICENSE
- + utils/changelog-d/README.md
- + utils/changelog-d/changelog-d.cabal
- utils/check-exact/ExactPrint.hs
- utils/check-exact/Main.hs
- utils/check-exact/Parsers.hs
- utils/check-exact/Transform.hs
- utils/check-exact/Utils.hs
- utils/deriveConstants/Main.hs
- utils/haddock/haddock-api/haddock-api.cabal
- utils/haddock/haddock-api/src/Haddock/Backends/Hoogle.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Hyperlinker/Parser.hs
- utils/haddock/haddock-api/src/Haddock/Backends/LaTeX.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Decl.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Utils.hs
- utils/haddock/haddock-api/src/Haddock/Convert.hs
- utils/haddock/haddock-api/src/Haddock/GhcUtils.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Create.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Rename.hs
- utils/haddock/haddock-api/src/Haddock/Interface/RenameType.hs
- utils/haddock/haddock-api/src/Haddock/InterfaceFile.hs
- utils/haddock/haddock-api/src/Haddock/Types.hs
- utils/haddock/haddock-library/haddock-library.cabal
- utils/haddock/haddock-test/haddock-test.cabal
- utils/haddock/haddock.cabal
- utils/haddock/html-test/src/LinearTypes.hs
- utils/haddock/latex-test/src/LinearTypes/LinearTypes.hs
- utils/hsc2hs
- utils/jsffi/dyld.mjs
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/2cc29aac475696ae89a1488c018429…
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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 5 commits: Simplify mkTick
by Marge Bot (＠marge-bot) 16 Apr '26
by Marge Bot (＠marge-bot) 16 Apr '26
16 Apr '26
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
d110a78c by sheaf at 2026-04-15T20:12:27-04:00
Simplify mkTick
This commit simplifies 'GHC.Core.Utils.mkTick', removing the
accumulating parameter 'rest' which was suspiciously treating a bunch of
different ticks as a group, and moving the group as a whole around the
AST, ignoring that the ticks in the group might have different placement
properties.
The most important change is that we revert the logic (added in 85b0aae2)
that allowed ticks to be placed around coercions, which caused serious
issues (e.g. #27121). It was just a mistake, as it doesn't make sense
to put a tick around a coercion.
Also adds Note [Pushing SCCs inwards] which clarifies the logic for
pushing SCCs into lambdas, constructor applications, and dropping SCCs
around non-function variables (in particular the treatment of splittable
ticks).
A few other changes are also implemented:
- simplify 'can_split' predicate (no functional change)
- combine profiling ticks into one when possible
Fixes #26878, #26941 and #27121
Co-authored-by: simonpj <simon.peytonjones(a)gmail.com>
- - - - -
fff7f6ca by aparker at 2026-04-15T20:12:31-04:00
NCG: Implement constant folding for vector simd ops (Issue #25030)
- - - - -
bbd0b492 by Simon Jakobi at 2026-04-15T20:12:34-04:00
Add regression test for #9074
Closes #9074.
- - - - -
fc76f4a3 by Sylvain Henry at 2026-04-15T20:12:41-04:00
Add changelog for #15973
- - - - -
db543941 by sheaf at 2026-04-15T20:12:47-04:00
Deal with 'noSpec' in 'coreExprToPmLit'
This commit makes two separate changes relating to
'GHC.HsToCore.Pmc.Solver.Types.coreExprAsPmLit':
1. Commit 7124e4ad mistakenly marked deferred errors as non-canonical,
which led to the introduction of 'nospec' wrappers in the
generated Core. This reverts that accident by declaring deferred
errors as being canonical, avoiding spurious 'nospec' wrapping.
2. Look through magic identity-like Ids such as 'nospec', 'inline' and
'lazy' in 'coreExprAsPmLit', just like Core Prep does.
There might genuinely be incoherent evidence, but that shouldn't
obstruct the pattern match checker. See test T27124a.
Fixes #25926 #27124
-------------------------
Metric Decrease:
T3294
-------------------------
- - - - -
37 changed files:
- + changelog.d/T15973
- + changelog.d/T27121.md
- + changelog.d/T27124.md
- + changelog.d/simd_constant_folding
- compiler/GHC/Cmm/Opt.hs
- compiler/GHC/Core/Opt/FloatOut.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/Stg/Debug.hs
- compiler/GHC/Tc/Errors.hs
- compiler/GHC/Types/Tickish.hs
- compiler/GHC/Utils/Misc.hs
- libraries/ghc-heap/tests/tso_and_stack_closures.hs
- + testsuite/tests/ghci/T9074/Makefile
- + testsuite/tests/ghci/T9074/T9074.hs
- + testsuite/tests/ghci/T9074/T9074.stdout
- + testsuite/tests/ghci/T9074/T9074a.c
- + testsuite/tests/ghci/T9074/T9074b.c
- + testsuite/tests/ghci/T9074/all.T
- + testsuite/tests/overloadedstrings/should_fail/T25926.hs
- + testsuite/tests/overloadedstrings/should_fail/T25926.stderr
- + testsuite/tests/overloadedstrings/should_fail/T27124.hs
- + testsuite/tests/overloadedstrings/should_fail/T27124.stderr
- + testsuite/tests/overloadedstrings/should_fail/all.T
- + testsuite/tests/overloadedstrings/should_run/T27124a.hs
- testsuite/tests/overloadedstrings/should_run/all.T
- + testsuite/tests/profiling/should_compile/T27121.hs
- + testsuite/tests/profiling/should_compile/T27121_aux.hs
- testsuite/tests/profiling/should_compile/all.T
- + testsuite/tests/simd/should_run/Makefile
- + testsuite/tests/simd/should_run/T25030.hs
- + testsuite/tests/simd/should_run/T25030.stdout
- testsuite/tests/simd/should_run/all.T
- + testsuite/tests/simplCore/should_compile/T26941.hs
- + testsuite/tests/simplCore/should_compile/T26941_aux.hs
- testsuite/tests/simplCore/should_compile/all.T
The diff was not included because it is too large.
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Simon Peyton Jones pushed to branch wip/T27078 at Glasgow Haskell Compiler / GHC
Commits:
78b20395 by Simon Peyton Jones at 2026-04-16T00:01:07+01:00
Wibble
- - - - -
1 changed file:
- compiler/GHC/Core/Lint.hs
Changes:
=====================================
compiler/GHC/Core/Lint.hs
=====================================
@@ -517,10 +517,10 @@ lintRecBindings top_lvl pairs thing_inside
; return (a, ues) }
where
(bndrs, rhss) = unzip pairs
- lint_pair bndr' rhs
- = addLoc (RhsOf bndr') $
- do { (rhs_ty, ue) <- lintRhs bndr' rhs -- Check the rhs
- ; lintLetBind top_lvl Recursive bndr' rhs rhs_ty
+ lint_pair bndr rhs
+ = addLoc (RhsOf bndr) $
+ do { (rhs_ty, ue) <- lintRhs bndr rhs -- Check the rhs
+ ; lintLetBind top_lvl Recursive bndr rhs rhs_ty
; return ue }
lintLetBody :: LintLocInfo -> [Id] -> CoreExpr -> LintM (Type, UsageEnv)
@@ -605,14 +605,17 @@ lintLetBind top_lvl rec_flag binder rhs rhs_ty
_ -> return ()
- ; addLoc (RuleOf binder) $ mapM_ (lintCoreRule binder binder_ty) (idCoreRules binder)
+ -- Lint any RULES
+ ; addLoc (RuleOf binder) $
+ mapM_ (lintCoreRule binder binder_ty) (idCoreRules binder)
+ -- Lint the unfolding
+ -- Do this here, not in lintIdBinder, so that all the
+ -- binders of the letrec group are in scope
; addLoc (UnfoldingOf binder) $
lintIdUnfolding binder binder_ty (idUnfolding binder)
- ; return () }
- -- We should check the unfolding, if any, but this is tricky because
- -- the unfolding is a SimplifiableCoreExpr. Give up for now.
+ ; return () }
-- | Checks the RHS of bindings. It only differs from 'lintCoreExpr'
-- in that it doesn't reject occurrences of the function 'makeStatic' when they
@@ -669,17 +672,26 @@ lintIdUnfolding :: Id -> Type -> Unfolding -> LintM ()
lintIdUnfolding bndr bndr_ty uf
| isStableUnfolding uf
, Just rhs <- maybeUnfoldingTemplate uf
- = noMultiplicityChecks $ -- Skip linearity checking for unfoldings
- -- See Note [Linting linearity]
- do { ty <- fst <$> (if isCompulsoryUnfolding uf
- then noFixedRuntimeRepChecks $ lintRhs bndr rhs
- -- ^^^^^^^^^^^^^^^^^^^^^^^
- -- See Note [Checking for representation polymorphism]
- else lintRhs bndr rhs)
- ; ensureEqTys bndr_ty ty (mkRhsMsg bndr (text "unfolding") ty) }
-lintIdUnfolding _ _ _
- = return () -- Do not Lint unstable unfoldings, because that leads
- -- to exponential behaviour; c.f. GHC.Core.FVs.idUnfoldingVars
+ = do { -- Check the unfolding only if lf_check_stable_unfoldings is on
+ -- See (STL3) in Note [Substituting type-lets]
+ flags <- getLintFlags
+ ; when (lf_check_stable_unfoldings flags) $
+ suppress_rr_checks $
+ noMultiplicityChecks $ -- Skip linearity checking for unfoldings
+ -- See Note [Linting linearity]
+ do { (unf_ty, _unf_ue) <- lintRhs bndr rhs
+ ; ensureEqTys bndr_ty unf_ty (mkRhsMsg bndr (text "unfolding") unf_ty) } }
+
+ | otherwise
+ = -- Do not Lint the body of an unstable unfolding, because that leads
+ -- to exponential behaviour; c.f. GHC.Core.FVs.idUnfoldingVars
+ return ()
+
+ where
+ -- See Note [Checking for representation polymorphism]
+ suppress_rr_checks thing_inside
+ | isCompulsoryUnfolding uf = noFixedRuntimeRepChecks thing_inside
+ | otherwise = thing_inside
{- Note [Checking for INLINE loop breakers]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -893,7 +905,7 @@ lintCoreExpr (Let (NonRec bndr rhs) body)
= do { -- First Lint the RHS, before bringing the binder into scope
(rhs_ty, let_ue) <- lintRhs bndr rhs
- -- See Note [Multiplicity of let binders] in Var
+ -- See Note [Multiplicity of let binders] in Var
-- Now lint the binder
; lintBinder LetBind bndr $
do { lintLetBind NotTopLevel NonRecursive bndr rhs rhs_ty
@@ -1824,7 +1836,12 @@ lintIdBndr top_lvl bind_site id thing_inside
; lintL (not (isCoVarType id_ty))
(text "Non-CoVar has coercion type" <+> ppr id <+> dcolon <+> ppr id_ty)
- ; lintLocalUnfolding bind_site id
+ -- Check that lambda-bound Ids have no unfolding; not even OtherCon
+ -- See #21496
+ ; let unf = idUnfolding id
+ ; checkL (not (bind_site == LambdaBind && hasSomeUnfolding unf)) $
+ hang (text "Lambda binder" <+> quotes (ppr id) <+> text "has an unfolding")
+ 2 (ppr unf)
; addLoc (IdTy id) (lintValueType id_ty)
@@ -1837,28 +1854,6 @@ lintIdBndr top_lvl bind_site id thing_inside
LetBind -> True
_ -> False
-lintLocalUnfolding :: BindingSite -> Id -> LintM ()
-lintLocalUnfolding bind_site id
- | Just unf_rhs <- maybeUnfoldingTemplate unf
- , isStableUnfolding unf
- = do { checkL (bind_site == LetBind) $
- hang (text "Non-let-binder" <+> quotes (ppr id) <+> text "has a stable unfolding")
- 2 (ppr unf)
- ; flags <- getLintFlags
- ; when (lf_check_stable_unfoldings flags) $
- do { (unf_ty, _unf_ue) <- lintCoreExpr unf_rhs
- ; ensureEqTys (idType id) unf_ty $
- hang (text "Unfolding for:" <+> ppr id <+> dcolon <+> ppr (idType id))
- 2 (text "has type:" <+> ppr unf_ty) } }
-
- | otherwise
- = do { -- Check that the lambda binder has no value or OtherCon unfolding.
- -- See #21496
- ; lintL (not (bind_site == LambdaBind && isEvaldUnfolding (idUnfolding id)))
- (text "Lambda binder with value or OtherCon unfolding.") }
- where
- unf = idUnfolding id
-
{-
%************************************************************************
%* *
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[Git][ghc/ghc][wip/sjakobi/T27096] Implement List.elem via foldr
by Simon Jakobi (＠sjakobi2) 16 Apr '26
by Simon Jakobi (＠sjakobi2) 16 Apr '26
16 Apr '26
Simon Jakobi pushed to branch wip/sjakobi/T27096 at Glasgow Haskell Compiler / GHC
Commits:
f020dd1f by Simon Jakobi at 2026-04-15T23:32:18+02:00
Implement List.elem via foldr
...in order to allow specialization to Eq instances.
Addresses #27096.
- - - - -
3 changed files:
- libraries/base/tests/perf/ElemNoFusion_O1.stderr
- libraries/base/tests/perf/ElemNoFusion_O2.stderr
- libraries/ghc-internal/src/GHC/Internal/List.hs
Changes:
=====================================
libraries/base/tests/perf/ElemNoFusion_O1.stderr
=====================================
@@ -1,5 +1,38 @@
-noFusionElemSort = \ x x1 -> elem $fEqInt x (actualSort gtInt x1)
+noFusionElemSort
+ = \ x x1 ->
+ joinrec {
+ go1 ds
+ = case ds of {
+ [] -> False;
+ : y ys ->
+ case x of { I# x2 ->
+ case y of { I# y1 ->
+ case ==# x2 y1 of {
+ __DEFAULT -> jump go1 ys;
+ 1# -> True
+ }
+ }
+ }
+ }; } in
+ jump go1 (actualSort gtInt x1)
noFusionElemNonEmptyToList
- = \ x x1 -> case x1 of { :| a1 as -> elem $fEqInt x (: a1 as) }
+ = \ x x1 ->
+ case x1 of { :| a1 as ->
+ joinrec {
+ go1 ds
+ = case ds of {
+ [] -> False;
+ : y ys ->
+ case x of { I# x2 ->
+ case y of { I# y1 ->
+ case ==# x2 y1 of {
+ __DEFAULT -> jump go1 ys;
+ 1# -> True
+ }
+ }
+ }
+ }; } in
+ jump go1 (: a1 as)
+ }
=====================================
libraries/base/tests/perf/ElemNoFusion_O2.stderr
=====================================
@@ -1,5 +1,54 @@
-noFusionElemSort = \ x x1 -> elem $fEqInt x (actualSort gtInt x1)
+noFusionElemSort
+ = \ x x1 ->
+ case actualSort gtInt x1 of {
+ [] -> False;
+ : y ys ->
+ case x of { I# x2 ->
+ case y of { I# y1 ->
+ case ==# x2 y1 of {
+ __DEFAULT ->
+ joinrec {
+ go1 ds
+ = case ds of {
+ [] -> False;
+ : y2 ys1 ->
+ case y2 of { I# y3 ->
+ case ==# x2 y3 of {
+ __DEFAULT -> jump go1 ys1;
+ 1# -> True
+ }
+ }
+ }; } in
+ jump go1 ys;
+ 1# -> True
+ }
+ }
+ }
+ }
noFusionElemNonEmptyToList
- = \ x x1 -> case x1 of { :| a1 as -> elem $fEqInt x (: a1 as) }
+ = \ x x1 ->
+ case x1 of { :| a1 as ->
+ case x of { I# x2 ->
+ case a1 of { I# y ->
+ case ==# x2 y of {
+ __DEFAULT ->
+ joinrec {
+ go1 ds
+ = case ds of {
+ [] -> False;
+ : y1 ys ->
+ case y1 of { I# y2 ->
+ case ==# x2 y2 of {
+ __DEFAULT -> jump go1 ys;
+ 1# -> True
+ }
+ }
+ }; } in
+ jump go1 as;
+ 1# -> True
+ }
+ }
+ }
+ }
=====================================
libraries/ghc-internal/src/GHC/Internal/List.hs
=====================================
@@ -1517,14 +1517,9 @@ all p (x:xs) = p x && all p xs
--
-- >>> 3 `elem` [4..]
-- * Hangs forever *
-elem :: (Eq a) => a -> [a] -> Bool
-elem _ [] = False
-elem x (y:ys) = x==y || elem x ys
-{-# NOINLINE [1] elem #-}
-{-# RULES
-"elem/build" forall x (g :: forall b . (a -> b -> b) -> b -> b)
- . elem x (build g) = g (\ y r -> (x == y) || r) False
- #-}
+elem :: Eq a => a -> [a] -> Bool
+elem x = foldr (\y r -> x == y || r) False
+{-# INLINE elem #-}
-- | 'notElem' is the negation of 'elem'.
--
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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 6 commits: Simplify mkTick
by Marge Bot (＠marge-bot) 16 Apr '26
by Marge Bot (＠marge-bot) 16 Apr '26
16 Apr '26
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
11c6fca1 by sheaf at 2026-04-15T15:29:04-04:00
Simplify mkTick
This commit simplifies 'GHC.Core.Utils.mkTick', removing the
accumulating parameter 'rest' which was suspiciously treating a bunch of
different ticks as a group, and moving the group as a whole around the
AST, ignoring that the ticks in the group might have different placement
properties.
The most important change is that we revert the logic (added in 85b0aae2)
that allowed ticks to be placed around coercions, which caused serious
issues (e.g. #27121). It was just a mistake, as it doesn't make sense
to put a tick around a coercion.
Also adds Note [Pushing SCCs inwards] which clarifies the logic for
pushing SCCs into lambdas, constructor applications, and dropping SCCs
around non-function variables (in particular the treatment of splittable
ticks).
A few other changes are also implemented:
- simplify 'can_split' predicate (no functional change)
- combine profiling ticks into one when possible
Fixes #26878, #26941 and #27121
Co-authored-by: simonpj <simon.peytonjones(a)gmail.com>
- - - - -
d2df9a48 by aparker at 2026-04-15T15:29:07-04:00
NCG: Implement constant folding for vector simd ops (Issue #25030)
- - - - -
365f8707 by Wolfgang Jeltsch at 2026-04-15T15:29:08-04:00
Move most of the `System.IO` implementation into `base`
This involves a rewrite of the `combine` helper function to avoid the
use of `last`, which would now be flagged as an error.
Metric Increase:
T12227
T12707
T5642
- - - - -
a6620207 by Simon Jakobi at 2026-04-15T15:29:11-04:00
Add regression test for #9074
Closes #9074.
- - - - -
1e5fe14d by Sylvain Henry at 2026-04-15T15:29:18-04:00
Add changelog for #15973
- - - - -
ebb924af by sheaf at 2026-04-15T15:29:35-04:00
Deal with 'noSpec' in 'coreExprToPmLit'
This commit makes two separate changes relating to
'GHC.HsToCore.Pmc.Solver.Types.coreExprAsPmLit':
1. Commit 7124e4ad mistakenly marked deferred errors as non-canonical,
which led to the introduction of 'nospec' wrappers in the
generated Core. This reverts that accident by declaring deferred
errors as being canonical, avoiding spurious 'nospec' wrapping.
2. Look through magic identity-like Ids such as 'nospec', 'inline' and
'lazy' in 'coreExprAsPmLit', just like Core Prep does.
There might genuinely be incoherent evidence, but that shouldn't
obstruct the pattern match checker. See test T27124a.
Fixes #25926 #27124
-------------------------
Metric Decrease:
T3294
-------------------------
- - - - -
64 changed files:
- + changelog.d/T15973
- + changelog.d/T27121.md
- + changelog.d/T27124.md
- + changelog.d/simd_constant_folding
- compiler/GHC/Cmm/Opt.hs
- compiler/GHC/Core/Opt/FloatOut.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/Stg/Debug.hs
- compiler/GHC/Tc/Errors.hs
- compiler/GHC/Types/Tickish.hs
- compiler/GHC/Utils/Misc.hs
- libraries/base/src/Control/Concurrent.hs
- libraries/base/src/GHC/IO/Handle.hs
- libraries/base/src/Prelude.hs
- libraries/base/src/System/IO.hs
- libraries/base/src/Text/Printf.hs
- libraries/ghc-heap/tests/tso_and_stack_closures.hs
- libraries/ghc-internal/src/GHC/Internal/System/IO.hs
- + testsuite/tests/ghci/T9074/Makefile
- + testsuite/tests/ghci/T9074/T9074.hs
- + testsuite/tests/ghci/T9074/T9074.stdout
- + testsuite/tests/ghci/T9074/T9074a.c
- + testsuite/tests/ghci/T9074/T9074b.c
- + testsuite/tests/ghci/T9074/all.T
- testsuite/tests/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/overloadedstrings/should_fail/T25926.hs
- + testsuite/tests/overloadedstrings/should_fail/T25926.stderr
- + testsuite/tests/overloadedstrings/should_fail/T27124.hs
- + testsuite/tests/overloadedstrings/should_fail/T27124.stderr
- + testsuite/tests/overloadedstrings/should_fail/all.T
- + testsuite/tests/overloadedstrings/should_run/T27124a.hs
- testsuite/tests/overloadedstrings/should_run/all.T
- + testsuite/tests/profiling/should_compile/T27121.hs
- + testsuite/tests/profiling/should_compile/T27121_aux.hs
- testsuite/tests/profiling/should_compile/all.T
- + testsuite/tests/simd/should_run/Makefile
- + testsuite/tests/simd/should_run/T25030.hs
- + testsuite/tests/simd/should_run/T25030.stdout
- testsuite/tests/simd/should_run/all.T
- + testsuite/tests/simplCore/should_compile/T26941.hs
- + testsuite/tests/simplCore/should_compile/T26941_aux.hs
- testsuite/tests/simplCore/should_compile/all.T
- testsuite/tests/typecheck/should_compile/T9497a.stderr
- testsuite/tests/typecheck/should_compile/holes.stderr
- testsuite/tests/typecheck/should_compile/holes3.stderr
- testsuite/tests/typecheck/should_compile/valid_hole_fits.stderr
- testsuite/tests/typecheck/should_fail/T9497d.stderr
- testsuite/tests/typecheck/should_run/T9497a-run.stderr
- testsuite/tests/typecheck/should_run/T9497b-run.stderr
- testsuite/tests/typecheck/should_run/T9497c-run.stderr
- utils/haddock/html-test/ref/Bug1004.html
- utils/haddock/html-test/ref/Bug973.html
- utils/haddock/html-test/ref/ConstructorPatternExport.html
- utils/haddock/html-test/ref/DefaultSignatures.html
- utils/haddock/html-test/ref/Hash.html
- utils/haddock/html-test/ref/PatternSyns.html
- utils/haddock/html-test/ref/PatternSyns2.html
- utils/haddock/html-test/ref/QuasiExpr.html
- utils/haddock/html-test/ref/Test.html
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/1c776e3ba5cab6adf63bda67c6adde…
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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/1c776e3ba5cab6adf63bda67c6adde…
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