[Git][ghc/ghc][master] ghc-toolchain: Also configure windres on non-windows platforms.
by Marge Bot (＠marge-bot) 22 Jan '26
by Marge Bot (＠marge-bot) 22 Jan '26
22 Jan '26
Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC
Commits:
88c93796 by Zubin Duggal at 2026-01-21T16:09:42-05:00
ghc-toolchain: Also configure windres on non-windows platforms.
It may be needed for cross compilation.
Fixes #24588
- - - - -
1 changed file:
- utils/ghc-toolchain/exe/Main.hs
Changes:
=====================================
utils/ghc-toolchain/exe/Main.hs
=====================================
@@ -480,13 +480,8 @@ mkTarget opts = do
opt <- optional $ findProgram "opt" (optOpt opts) ["opt"]
llvmAs <- optional $ findProgram "llvm assembler" (optLlvmAs opts) ["clang"]
- -- Windows-specific utilities
- windres <-
- case archOS_OS archOs of
- OSMinGW32 -> do
- windres <- findProgram "windres" (optWindres opts) ["windres"]
- return (Just windres)
- _ -> return Nothing
+ -- for windows, also used for cross compiling
+ windres <- optional $ findProgram "windres" (optWindres opts) ["windres"]
-- Darwin-specific utilities
(otool, installNameTool) <-
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[Git][ghc/ghc][master] testsuite: avoid re.sub in favor of simple string replacements
by Marge Bot (＠marge-bot) 22 Jan '26
by Marge Bot (＠marge-bot) 22 Jan '26
22 Jan '26
Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC
Commits:
ca79475f by Cheng Shao at 2026-01-21T16:09:00-05:00
testsuite: avoid re.sub in favor of simple string replacements
This patch refactors the testsuite driver and avoids the usage of
re.sub in favor of simple string replacements when possible. The
changes are not comprehensive, and there are still a lot of re.sub
usages lingering around the tree, but this already addresses a major
performance bottleneck in the testsuite driver that might has to do
with quadratic or worse slowdown in cpython's regular expression
engine when handling certain regex patterns with large strings.
Especially on i386, and i386 jobs are the bottlenecks of all full-ci
validate pipelines!
Here are the elapsed times of testing x86_64/i386 with -j48 before
this patch:
x86_64: `Build completed in 6m06s`
i386: `Build completed in 1h36m`
And with this patch:
x86_64: `Build completed in 4m55s`
i386: `Build completed in 4m23s`
Fixes #26786.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
3 changed files:
- testsuite/driver/runtests.py
- testsuite/driver/testlib.py
- testsuite/driver/testutil.py
Changes:
=====================================
testsuite/driver/runtests.py
=====================================
@@ -28,7 +28,7 @@ import subprocess
import asyncio
-from testutil import getStdout, str_warn, str_info, print_table, shorten_metric_name
+from testutil import getStdout, str_warn, str_info, print_table, shorten_metric_name, str_removeprefix
from testglobals import getConfig, ghc_env, TestConfig, t, \
TestOptions, brokens, PerfMetric
from my_typing import TestName
@@ -291,7 +291,7 @@ if windows:
for line in pkginfo.split('\n'):
if line.startswith('library-dirs:'):
path = line.rstrip()
- path = re.sub('^library-dirs: ', '', path)
+ path = str_removeprefix(path, 'library-dirs: ')
# Use string.replace instead of re.sub, because re.sub
# interprets backslashes in the replacement string as
# escape sequences.
=====================================
testsuite/driver/testlib.py
=====================================
@@ -25,7 +25,7 @@ from testglobals import config, ghc_env, default_testopts, brokens, t, \
from testutil import strip_quotes, lndir, link_or_copy_file, passed, \
failBecause, testing_metrics, residency_testing_metrics, \
stable_perf_counters, \
- PassFail, badResult, memoize
+ PassFail, badResult, memoize, str_removeprefix
from term_color import Color, colored
import testutil
from cpu_features import have_cpu_feature
@@ -1792,7 +1792,7 @@ async def do_test(name: TestName,
if opts.expect not in ['pass', 'fail', 'missing-lib']:
framework_fail(name, way, 'bad expected ' + opts.expect)
- directory = re.sub(r'^\.[/\\]', '', str(opts.testdir))
+ directory = str_removeprefix(str_removeprefix(str(opts.testdir), './'), '.\\')
if way in opts.fragile_ways:
if_verbose(1, '*** fragile test %s resulted in %s' % (full_name, 'pass' if result.passed else 'fail'))
@@ -1830,7 +1830,7 @@ async def do_test(name: TestName,
# if found and instead have the testsuite decide on what to do
# with the output.
def override_options(pre_cmd):
- if config.verbose >= 5 and bool(re.match(r'\$make', pre_cmd, re.I)):
+ if config.verbose >= 5 and pre_cmd.lower().startswith('$make'):
return pre_cmd.replace(' -s' , '') \
.replace('--silent', '') \
.replace('--quiet' , '')
@@ -1843,7 +1843,7 @@ def framework_fail(name: Optional[TestName], way: Optional[WayName], reason: str
# so we need to take care not to blow up with the wrong way
# and report the actual reason for the failure.
try:
- directory = re.sub(r'^\.[/\\]', '', str(opts.testdir))
+ directory = str_removeprefix(str_removeprefix(str(opts.testdir), './'), '.\\')
except:
directory = ''
full_name = '%s(%s)' % (name, way)
@@ -1856,7 +1856,7 @@ def framework_fail(name: Optional[TestName], way: Optional[WayName], reason: str
def framework_warn(name: TestName, way: WayName, reason: str) -> None:
opts = getTestOpts()
- directory = re.sub(r'^\.[/\\]', '', str(opts.testdir))
+ directory = str_removeprefix(str_removeprefix(str(opts.testdir), './'), '.\\')
full_name = name + '(' + way + ')'
if_verbose(1, '*** framework warning for %s %s ' % (full_name, reason))
t.framework_warnings.append(TestResult(directory, name, reason, way))
@@ -2550,7 +2550,7 @@ def split_file(in_fn: Path, delimiter: str, out1_fn: Path, out2_fn: Path):
with out1_fn.open('w', encoding='utf8', newline='') as out1:
with out2_fn.open('w', encoding='utf8', newline='') as out2:
line = infile.readline()
- while re.sub(r'^\s*','',line) != delimiter and line != '':
+ while line.lstrip() != delimiter and line != '':
out1.write(line)
line = infile.readline()
@@ -2933,6 +2933,14 @@ def normalise_callstacks(s: str) -> str:
tyCon_re = re.compile(r'TyCon\s*\d+\#\#\d?\d?\s*\d+\#\#\d?\d?\s*', flags=re.MULTILINE)
+def drop_lines_containing(s: str, needle: str) -> str:
+ """
+ Drop lines from `s` which contain `needle`.
+ """
+ if needle not in s:
+ return s
+ return ''.join(line for line in s.splitlines(keepends=True) if needle not in line)
+
def normalise_type_reps(s: str) -> str:
""" Normalise out fingerprints from Typeable TyCon representations """
return re.sub(tyCon_re, 'TyCon FINGERPRINT FINGERPRINT ', s)
@@ -2944,8 +2952,8 @@ def normalise_errmsg(s: str) -> str:
s = s.replace('ld: 0706-027 The -x flag is ignored.\n', '')
# remove " error:" and lower-case " Warning:" to make patch for
# trac issue #10021 smaller
- s = modify_lines(s, lambda l: re.sub(' error:', '', l))
- s = modify_lines(s, lambda l: re.sub(' Warning:', ' warning:', l))
+ s = modify_lines(s, lambda l: l.replace(' error:', ''))
+ s = modify_lines(s, lambda l: l.replace(' Warning:', ' warning:'))
s = normalise_callstacks(s)
s = normalise_type_reps(s)
@@ -2960,7 +2968,7 @@ def normalise_errmsg(s: str) -> str:
# a target prefix (e.g. `aarch64-linux-gnu-ghc`)
# * On Windows the executable name may mention the
# versioned name (e.g. `ghc-9.2.1`)
- s = re.sub(Path(config.compiler).name + ':', 'ghc:', s)
+ s = s.replace(Path(config.compiler).name + ':', 'ghc:')
# If somefile ends in ".exe" or ".exe:", zap ".exe" (for Windows)
# the colon is there because it appears in error messages; this
@@ -2973,11 +2981,13 @@ def normalise_errmsg(s: str) -> str:
s = re.sub(r'([^\s])\.jsexe', r'\1', s)
# hpc executable is given ghc suffix
- s = re.sub('hpc-ghc', 'hpc', s)
+ s = s.replace('hpc-ghc', 'hpc')
# The inplace ghc's are called ghc-stage[123] to avoid filename
# collisions, so we need to normalise that to just "ghc"
- s = re.sub('ghc-stage[123]', 'ghc', s)
+ s = (s.replace('ghc-stage1', 'ghc')
+ .replace('ghc-stage2', 'ghc')
+ .replace('ghc-stage3', 'ghc'))
# Remove platform prefix (e.g. javascript-unknown-ghcjs) for cross-compiled tools
# (ghc, ghc-pkg, unlit, etc.)
s = re.sub(r'\w+(-\w+)*-ghc', 'ghc', s)
@@ -3000,7 +3010,7 @@ def normalise_errmsg(s: str) -> str:
# Also filter out bullet characters. This is because bullets are used to
# separate error sections, and tests shouldn't be sensitive to how the
# the division happens.
- bullet = '•'.encode('utf8') if isinstance(s, bytes) else '•'
+ bullet = '•'
s = s.replace(bullet, '')
# Windows only, this is a bug in hsc2hs but it is preventing
@@ -3015,19 +3025,19 @@ def normalise_errmsg(s: str) -> str:
s = modify_lines(s, lambda l: re.sub(r'^(.+)warning: (.+): unsupported GNU_PROPERTY_TYPE (?:\(5\) )?type: 0xc000000(.*)$', '', l))
s = re.sub(r'ld: warning: passed .* min versions \(.*\) for platform macOS. Using [\.0-9]+.','',s)
- s = re.sub('ld: warning: -sdk_version and -platform_version are not compatible, ignoring -sdk_version','',s)
+ s = s.replace('ld: warning: -sdk_version and -platform_version are not compatible, ignoring -sdk_version', '')
# ignore superfluous dylibs passed to the linker.
- s = re.sub('ld: warning: .*, ignoring unexpected dylib file\n','',s)
+ s = drop_lines_containing(s, 'ignoring unexpected dylib file')
# ignore LLVM Version mismatch garbage; this will just break tests.
- s = re.sub('You are using an unsupported version of LLVM!.*\n','',s)
- s = re.sub('Currently only [\\.0-9]+ is supported. System LLVM version: [\\.0-9]+.*\n','',s)
- s = re.sub('We will try though\\.\\.\\..*\n','',s)
+ s = drop_lines_containing(s, 'You are using an unsupported version of LLVM!')
+ s = drop_lines_containing(s, 'System LLVM version:')
+ s = drop_lines_containing(s, 'We will try though...')
# ignore warning about strip invalidating signatures
- s = re.sub('.*strip: changes being made to the file will invalidate the code signature in.*\n','',s)
+ s = drop_lines_containing(s, 'strip: changes being made to the file will invalidate the code signature in')
# clang may warn about unused argument when used as assembler
- s = re.sub('.*warning: argument unused during compilation:.*\n', '', s)
+ s = drop_lines_containing(s, 'warning: argument unused during compilation:')
# Emscripten displays cache info and old emcc doesn't support EMCC_LOGGING=0
- s = re.sub('cache:INFO: .*\n', '', s)
+ s = drop_lines_containing(s, 'cache:INFO:')
# Old emcc warns when we export HEAP8 but new one requires it (see #26290)
s = s.replace('warning: invalid item in EXPORTED_RUNTIME_METHODS: HEAP8\nwarning: invalid item in EXPORTED_RUNTIME_METHODS: HEAPU8\nemcc: warning: warnings in JS library compilation [-Wjs-compiler]\n','')
@@ -3050,7 +3060,7 @@ def normalise_prof (s: str) -> str:
# The next step assumes none of the fields have no spaces in, which is broke
# when the src = <no location info>
- s = re.sub('no location info','no-location-info', s)
+ s = s.replace('no location info', 'no-location-info')
# Source locations from internal libraries, remove the source location
# > libraries/ghc-internal/src/path/Foo.hs:204:1-18
@@ -3103,21 +3113,21 @@ def normalise_prof (s: str) -> str:
return s
def normalise_slashes_( s: str ) -> str:
- s = re.sub(r'\\', '/', s)
- s = re.sub(r'//', '/', s)
+ s = s.replace('\\', '/')
+ s = s.replace('//', '/')
return s
def normalise_exe_( s: str ) -> str:
- s = re.sub(r'\.exe', '', s)
- s = re.sub(r'\.wasm', '', s)
- s = re.sub(r'\.jsexe', '', s)
+ s = s.replace('.exe', '')
+ s = s.replace('.wasm', '')
+ s = s.replace('.jsexe', '')
return s
def normalise_output( s: str ) -> str:
# remove " error:" and lower-case " Warning:" to make patch for
# trac issue #10021 smaller
- s = modify_lines(s, lambda l: re.sub(' error:', '', l))
- s = modify_lines(s, lambda l: re.sub(' Warning:', ' warning:', l))
+ s = modify_lines(s, lambda l: l.replace(' error:', ''))
+ s = modify_lines(s, lambda l: l.replace(' Warning:', ' warning:'))
# Remove a .exe extension (for Windows)
# and .wasm extension (for the Wasm backend)
# and .jsexe extension (for the JS backend)
@@ -3129,19 +3139,19 @@ def normalise_output( s: str ) -> str:
s = normalise_type_reps(s)
# ghci outputs are pretty unstable with -fexternal-dynamic-refs, which is
# requires for -fPIC
- s = re.sub(' -fexternal-dynamic-refs\n','',s)
+ s = s.replace(' -fexternal-dynamic-refs\n', '')
s = re.sub(r'ld: warning: passed .* min versions \(.*\) for platform macOS. Using [\.0-9]+.','',s)
- s = re.sub('ld: warning: -sdk_version and -platform_version are not compatible, ignoring -sdk_version','',s)
+ s = s.replace('ld: warning: -sdk_version and -platform_version are not compatible, ignoring -sdk_version', '')
# ignore superfluous dylibs passed to the linker.
- s = re.sub('ld: warning: .*, ignoring unexpected dylib file\n','',s)
+ s = drop_lines_containing(s, 'ignoring unexpected dylib file')
# ignore LLVM Version mismatch garbage; this will just break tests.
- s = re.sub('You are using an unsupported version of LLVM!.*\n','',s)
- s = re.sub('Currently only [\\.0-9]+ is supported. System LLVM version: [\\.0-9]+.*\n','',s)
- s = re.sub('We will try though\\.\\.\\..*\n','',s)
+ s = drop_lines_containing(s, 'You are using an unsupported version of LLVM!')
+ s = drop_lines_containing(s, 'System LLVM version:')
+ s = drop_lines_containing(s, 'We will try though...')
# ignore warning about strip invalidating signatures
- s = re.sub('.*strip: changes being made to the file will invalidate the code signature in.*\n','',s)
+ s = drop_lines_containing(s, 'strip: changes being made to the file will invalidate the code signature in')
# clang may warn about unused argument when used as assembler
- s = re.sub('.*warning: argument unused during compilation:.*\n', '', s)
+ s = drop_lines_containing(s, 'warning: argument unused during compilation:')
# strip the cross prefix if any
s = re.sub(r'\w+(-\w+)*-ghc', 'ghc', s)
=====================================
testsuite/driver/testutil.py
=====================================
@@ -40,6 +40,12 @@ def strip_quotes(s: str) -> str:
# Don't wrap commands to subprocess.call/Popen in quotes.
return s.strip('\'"')
+# Python 3.7 compatibility shim for str.removeprefix (added in Python 3.9).
+def str_removeprefix(s: str, prefix: str) -> str:
+ if s.startswith(prefix):
+ return s.replace(prefix, '', 1)
+ return s
+
def str_warn(s: str) -> str:
return colored(Color.YELLOW, s)
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[Git][ghc/ghc][master] Make the implicit-parameter class have representational role
by Marge Bot (＠marge-bot) 22 Jan '26
by Marge Bot (＠marge-bot) 22 Jan '26
22 Jan '26
Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC
Commits:
34a27e20 by Simon Peyton Jones at 2026-01-21T16:08:17-05:00
Make the implicit-parameter class have representational role
This MR addresses #26737, by making the built-in class IP
have a representational role for its second parameter.
See Note [IP: implicit parameter class] in
ghc-internal:GHC.Internal.Classes.IP
In fact, IP is (unfortunately, currently) exposed by
base:GHC.Base, so we ran a quick CLC proposal to
agree the change:
https://github.com/haskell/core-libraries-committee/issues/385
Some (small) compilations get faster because they only need to
load (small) interface file GHC.Internal.Classes.IP.hi,
rather than (large) GHC.Internal.Classes.hi.
Metric Decrease:
T10421
T12150
T12425
T24582
T5837
T5030
- - - - -
14 changed files:
- compiler/GHC/Builtin/Names.hs
- docs/users_guide/9.16.1-notes.rst
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/src/GHC/Internal/Classes.hs
- + libraries/ghc-internal/src/GHC/Internal/Classes/IP.hs
- testsuite/tests/interface-stability/base-exports.stdout
- testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs
- testsuite/tests/interface-stability/base-exports.stdout-mingw32
- testsuite/tests/interface-stability/base-exports.stdout-ws-32
- testsuite/tests/interface-stability/ghc-prim-exports.stdout
- testsuite/tests/interface-stability/ghc-prim-exports.stdout-mingw32
- testsuite/tests/th/TH_implicitParams.stdout
- + testsuite/tests/typecheck/should_compile/T26737.hs
- testsuite/tests/typecheck/should_compile/all.T
Changes:
=====================================
compiler/GHC/Builtin/Names.hs
=====================================
@@ -526,7 +526,7 @@ genericTyConNames = [
gHC_PRIM, gHC_PRIM_PANIC,
gHC_TYPES, gHC_INTERNAL_DATA_DATA, gHC_MAGIC, gHC_MAGIC_DICT,
- gHC_CLASSES, gHC_PRIMOPWRAPPERS :: Module
+ gHC_CLASSES, gHC_CLASSES_IP, gHC_PRIMOPWRAPPERS :: Module
gHC_PRIM = mkGhcInternalModule (fsLit "GHC.Internal.Prim") -- Primitive types and values
gHC_PRIM_PANIC = mkGhcInternalModule (fsLit "GHC.Internal.Prim.Panic")
gHC_TYPES = mkGhcInternalModule (fsLit "GHC.Internal.Types")
@@ -534,6 +534,7 @@ gHC_MAGIC = mkGhcInternalModule (fsLit "GHC.Internal.Magic")
gHC_MAGIC_DICT = mkGhcInternalModule (fsLit "GHC.Internal.Magic.Dict")
gHC_CSTRING = mkGhcInternalModule (fsLit "GHC.Internal.CString")
gHC_CLASSES = mkGhcInternalModule (fsLit "GHC.Internal.Classes")
+gHC_CLASSES_IP = mkGhcInternalModule (fsLit "GHC.Internal.Classes.IP")
gHC_PRIMOPWRAPPERS = mkGhcInternalModule (fsLit "GHC.Internal.PrimopWrappers")
gHC_INTERNAL_TUPLE = mkGhcInternalModule (fsLit "GHC.Internal.Tuple")
@@ -1521,7 +1522,7 @@ fromLabelClassOpName
-- Implicit Parameters
ipClassName :: Name
ipClassName
- = clsQual gHC_CLASSES (fsLit "IP") ipClassKey
+ = clsQual gHC_CLASSES_IP (fsLit "IP") ipClassKey
-- Overloaded record fields
hasFieldClassName :: Name
=====================================
docs/users_guide/9.16.1-notes.rst
=====================================
@@ -30,6 +30,18 @@ Language
- The extension :extension:`ExplicitNamespaces` now allows namespace-specified
wildcards ``type ..`` and ``data ..`` in import and export lists.
+- Implicit parameters and ``ImpredicativeTypes``. GHC now knows
+ that if ``?foo::S`` is coecible to ``?foo::T`` only if ``S`` is coercible to ``T``.
+ Example (from :ghc-ticket:`#26737`)::
+
+ {-# LANGUAGE ImplicitParams, ImpredicativeTypes #-}
+ newtype N = MkN Int
+ test :: ((?foo::N) => Bool) -> ((?foo::Int) => Bool)
+ test = coerce
+
+ This is achieved by arranging that ``?foo :: T`` has a representational
+ role for ``T``.
+
Compiler
~~~~~~~~
=====================================
libraries/ghc-internal/ghc-internal.cabal.in
=====================================
@@ -343,6 +343,7 @@ Library
GHC.Internal.CString
GHC.Internal.Classes
+ GHC.Internal.Classes.IP
GHC.Internal.Debug
GHC.Internal.Magic
GHC.Internal.Magic.Dict
=====================================
libraries/ghc-internal/src/GHC/Internal/Classes.hs
=====================================
@@ -1,10 +1,9 @@
{-# LANGUAGE Trustworthy #-}
{-# LANGUAGE NoImplicitPrelude, MagicHash, StandaloneDeriving, BangPatterns,
KindSignatures, DataKinds, ConstraintKinds,
- MultiParamTypeClasses, FunctionalDependencies #-}
-{-# LANGUAGE UnboxedTuples #-}
-{-# LANGUAGE AllowAmbiguousTypes #-}
- -- ip :: IP x a => a is strictly speaking ambiguous, but IP is magic
+ MultiParamTypeClasses, FunctionalDependencies,
+ UnboxedTuples #-}
+
{-# LANGUAGE UndecidableSuperClasses #-}
-- Because of the type-variable superclasses for tuples
@@ -142,6 +141,7 @@ import GHC.Internal.Prim
import GHC.Internal.Tuple
import GHC.Internal.CString (unpackCString#)
import GHC.Internal.Types
+import GHC.Internal.Classes.IP
infix 4 ==, /=, <, <=, >=, >
infixr 3 &&
@@ -149,12 +149,6 @@ infixr 2 ||
default () -- Double isn't available yet
--- | The syntax @?x :: a@ is desugared into @IP "x" a@
--- IP is declared very early, so that libraries can take
--- advantage of the implicit-call-stack feature
-class IP (x :: Symbol) a | x -> a where
- ip :: a
-
{- $matching_overloaded_methods_in_rules
Matching on class methods (e.g. @(==)@) in rewrite rules tends to be a bit
=====================================
libraries/ghc-internal/src/GHC/Internal/Classes/IP.hs
=====================================
@@ -0,0 +1,87 @@
+{-# LANGUAGE Trustworthy #-}
+{-# LANGUAGE NoImplicitPrelude, MagicHash, StandaloneDeriving, BangPatterns,
+ KindSignatures, DataKinds, ConstraintKinds,
+ MultiParamTypeClasses, FunctionalDependencies #-}
+
+{-# LANGUAGE AllowAmbiguousTypes, RoleAnnotations, IncoherentInstances #-}
+ -- LANGUAGE pragmas: see Note [IP: implicit parameter class]
+
+{-# OPTIONS_HADDOCK not-home #-}
+-----------------------------------------------------------------------------
+-- |
+-- Module : GHC.Internal.Classes.IP
+-- Copyright : (c) The University of Glasgow, 1992-2002
+-- License : see libraries/base/LICENSE
+--
+-- Maintainer : ghc-devs(a)haskell.org
+-- Stability : internal
+-- Portability : non-portable (GHC extensions)
+--
+-- Basic classes.
+-- Do not import this module directly. It is an GHC internal only
+-- module. Some of its contents are instead available from @Prelude@
+-- and @GHC.Int@.
+--
+-----------------------------------------------------------------------------
+
+module GHC.Internal.Classes.IP( IP(..)) where
+
+import GHC.Internal.Types
+
+
+default () -- Double isn't available yet
+
+-- | The syntax @?x :: a@ is desugared into @IP "x" a@
+-- IP is declared very early, so that libraries can take
+-- advantage of the implicit-call-stack feature
+type role IP nominal representational -- See (IPRoles)
+class IP (x :: Symbol) a | x -> a where
+ ip :: a
+
+{- Note [IP: implicit parameter class]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+An implicit parameter constraint (?foo::ty) is just short for
+
+ IP "foo" ty
+
+where ghc-internal:GHC.Internal.Classes.IP is a special class that
+GHC knows about, defined in this module.
+
+* It is a unary type class, with one method `ip`, so it has no cost.
+ For example, (?foo::Int) is represented just by an Int.
+
+* Criticially, it has a functional dependency:
+ class IP (x :: Symbol) a | x -> a where ...
+ So if we have
+ [G] IP "foo" Int
+ [W] IP "foo" alpha
+ the fundep wil lgive us alpha ~ Int, as desired.
+
+* The solver has a number of special cases for implicit parameters,
+ mainly because a binding (let ?foo::Int = rhs in body)
+ is like a local instance declaration for IP. Search for uses
+ of `isIPClass`.
+
+Wrinkles
+
+(IPAmbiguity) The single method of IP has an ambiguous type
+ ip :: forall a. IP s a => a
+ Hence the LANGUAGE pragama AllowAmbiguousTypes.
+ The method `ip` is never called by the user, so ambiguity doesn't matter.
+
+(IPRoles) IP has a role annotation. Why? See #26737. We want
+ [W] IP "foo" t1 ~R# IP "foo" t2
+ to decompose to give [W] IP t1 ~R# t2, using /representational/
+ equality for (t1 ~R# t2) not nominal.
+
+ This usually gives a complaint about incoherence, because in general
+ (t1 ~R# t2) does NOT imply (C t1) ~R# (C t2) for any normal class.
+ But it does for IP, because instance selection is controlled by the Symbol,
+ not the type of the payload. Hence LANGUAGE pragma IncoherentInstances.
+ (It is unfortunate that we need a module-wide IncoherentInstances here;
+ see #17167.)
+
+ Side note: arguably this treatment could be applied to any class
+ with a functional dependency; but for now we restrict it to IP.
+-}
+
=====================================
testsuite/tests/interface-stability/base-exports.stdout
=====================================
@@ -3293,6 +3293,7 @@ module GHC.Base where
{-# MINIMAL fmap #-}
type IO :: * -> *
newtype IO a = IO (State# RealWorld -> (# State# RealWorld, a #))
+ type role IP nominal representational
type IP :: Symbol -> * -> Constraint
class IP x a | x -> a where
ip :: a
=====================================
testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs
=====================================
@@ -3293,6 +3293,7 @@ module GHC.Base where
{-# MINIMAL fmap #-}
type IO :: * -> *
newtype IO a = IO (State# RealWorld -> (# State# RealWorld, a #))
+ type role IP nominal representational
type IP :: Symbol -> * -> Constraint
class IP x a | x -> a where
ip :: a
=====================================
testsuite/tests/interface-stability/base-exports.stdout-mingw32
=====================================
@@ -3293,6 +3293,7 @@ module GHC.Base where
{-# MINIMAL fmap #-}
type IO :: * -> *
newtype IO a = IO (State# RealWorld -> (# State# RealWorld, a #))
+ type role IP nominal representational
type IP :: Symbol -> * -> Constraint
class IP x a | x -> a where
ip :: a
=====================================
testsuite/tests/interface-stability/base-exports.stdout-ws-32
=====================================
@@ -3293,6 +3293,7 @@ module GHC.Base where
{-# MINIMAL fmap #-}
type IO :: * -> *
newtype IO a = IO (State# RealWorld -> (# State# RealWorld, a #))
+ type role IP nominal representational
type IP :: Symbol -> * -> Constraint
class IP x a | x -> a where
ip :: a
=====================================
testsuite/tests/interface-stability/ghc-prim-exports.stdout
=====================================
@@ -1171,6 +1171,7 @@ module GHC.Classes where
(==) :: a -> a -> GHC.Internal.Types.Bool
(/=) :: a -> a -> GHC.Internal.Types.Bool
{-# MINIMAL (==) | (/=) #-}
+ type role IP nominal representational
type IP :: GHC.Internal.Types.Symbol -> * -> Constraint
class IP x a | x -> a where
ip :: a
=====================================
testsuite/tests/interface-stability/ghc-prim-exports.stdout-mingw32
=====================================
@@ -1171,6 +1171,7 @@ module GHC.Classes where
(==) :: a -> a -> GHC.Internal.Types.Bool
(/=) :: a -> a -> GHC.Internal.Types.Bool
{-# MINIMAL (==) | (/=) #-}
+ type role IP nominal representational
type IP :: GHC.Internal.Types.Symbol -> * -> Constraint
class IP x a | x -> a where
ip :: a
=====================================
testsuite/tests/th/TH_implicitParams.stdout
=====================================
@@ -1,5 +1,5 @@
-Main.funcToReify :: GHC.Internal.Classes.IP "z"
- GHC.Internal.Types.Int =>
+Main.funcToReify :: GHC.Internal.Classes.IP.IP "z"
+ GHC.Internal.Types.Int =>
GHC.Internal.Types.Int
5
1
=====================================
testsuite/tests/typecheck/should_compile/T26737.hs
=====================================
@@ -0,0 +1,10 @@
+{-# LANGUAGE ImpredicativeTypes, ImplicitParams #-}
+
+module T26737 where
+
+import Data.Coerce
+
+newtype Foo = MkFoo Int
+
+b :: ((?foo :: Foo) => Int) -> ((?foo :: Int) => Int)
+b = coerce @(((?foo :: Foo) => Int)) @(((?foo :: Int) => Int))
=====================================
testsuite/tests/typecheck/should_compile/all.T
=====================================
@@ -958,3 +958,4 @@ test('T14745', normal, compile, [''])
test('T26451', normal, compile, [''])
test('T26582', normal, compile, [''])
test('T26746', normal, compile, [''])
+test('T26737', normal, compile, [''])
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/34a27e2042b697b198aa85a7460fee7…
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[Git][ghc/ghc][master] 2 commits: rts: fix typo in TICK_ALLOC_RTS
by Marge Bot (＠marge-bot) 22 Jan '26
by Marge Bot (＠marge-bot) 22 Jan '26
22 Jan '26
Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC
Commits:
5efb58dc by Cheng Shao at 2026-01-21T16:07:36-05:00
rts: fix typo in TICK_ALLOC_RTS
This patch fixes a typo in the `TICK_ALLOC_RTS` macro, the original
`bytes` argument was silently dropped. The Cmm code has its own
version of `TICK_ALLOC_RTS` not affected by this typo, it affected the
C RTS, and went unnoticed because the variable `n` happened to also be
available at its call site. But the number was incorrect. Also fixes
its call site since `WDS()` is not available in C.
- - - - -
c406ea69 by Cheng Shao at 2026-01-21T16:07:36-05:00
rts: remove broken & unused ALLOC_P_TICKY
This patch removes the `ALLOC_P_TICKY` macro from the rts, it's
unused, and its expanded code is already broken.
- - - - -
3 changed files:
- rts/include/Cmm.h
- rts/include/stg/Ticky.h
- rts/sm/Storage.c
Changes:
=====================================
rts/include/Cmm.h
=====================================
@@ -441,12 +441,6 @@
#define HP_CHK_P(bytes, fun, arg) \
HEAP_CHECK(bytes, GC_PRIM_P(fun,arg))
-// TODO I'm not seeing where ALLOC_P_TICKY is used; can it be removed?
-// -NSF March 2013
-#define ALLOC_P_TICKY(bytes, fun, arg) \
- HP_CHK_P(bytes); \
- TICK_ALLOC_RTS(bytes);
-
// Load a field out of structure with relaxed ordering.
#define RELAXED_LOAD_FIELD(fld, ptr) \
REP_##fld![(ptr) + OFFSET_##fld]
=====================================
rts/include/stg/Ticky.h
=====================================
@@ -246,7 +246,7 @@ EXTERN StgInt RET_UNBOXED_TUP_hst[TICKY_BIN_COUNT] INIT({0});
TICK_BUMP_BY(ALLOC_THK_gds,g);\
TICK_BUMP_BY(ALLOC_THK_slp,s);\
-#define TICK_ALLOC_RTS(bytes)\
+#define TICK_ALLOC_RTS(n)\
TICK_BUMP(ALLOC_RTS_ctr);\
TICK_BUMP_BY(ALLOC_RTS_tot,n);
#endif
=====================================
rts/sm/Storage.c
=====================================
@@ -990,7 +990,7 @@ move_STACK (StgStack *src, StgStack *dest)
void
accountAllocation(Capability *cap, W_ n)
{
- TICK_ALLOC_RTS(WDS(n));
+ TICK_ALLOC_RTS(n*sizeof(W_));
CCS_ALLOC(cap->r.rCCCS,n);
if (cap->r.rCurrentTSO != NULL) {
// cap->r.rCurrentTSO->alloc_limit -= n*sizeof(W_)
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/485c12b2fe697b71a62fcd1f418aaa…
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[Git][ghc/ghc][master] Revert "hadrian: handle findExecutable "" gracefully"
by Marge Bot (＠marge-bot) 22 Jan '26
by Marge Bot (＠marge-bot) 22 Jan '26
22 Jan '26
Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC
Commits:
485c12b2 by Cheng Shao at 2026-01-21T16:06:54-05:00
Revert "hadrian: handle findExecutable "" gracefully"
This reverts commit 1e5752f64a522c4025365856d92f78073a7b3bba. The
underlying issue has been fixed in
https://github.com/haskell/directory/commit/75828696e7145adc09179111a0d631b…
and present since 1.3.9.0, and hadrian directory lower bound is
1.3.9.0, so we can revert our own in house hack now.
- - - - -
4 changed files:
- hadrian/src/Hadrian/Utilities.hs
- hadrian/src/Rules/Docspec.hs
- hadrian/src/Rules/Lint.hs
- hadrian/src/Settings/Builders/RunTest.hs
Changes:
=====================================
hadrian/src/Hadrian/Utilities.hs
=====================================
@@ -19,7 +19,6 @@ module Hadrian.Utilities (
copyFile, copyFileUntracked, createFileLink, fixFile,
makeExecutable, moveFile, removeFile, createDirectory, copyDirectory,
moveDirectory, removeDirectory, removeFile_, writeFileChangedBS,
- findExecutable,
-- * Diagnostic info
Colour (..), ANSIColour (..), putColoured, shouldUseColor,
@@ -691,7 +690,3 @@ renderUnicorn ls =
ponyPadding = " "
boxLines :: [String]
boxLines = ["", "", ""] ++ (lines . renderBox $ ls)
-
--- Workaround for https://github.com/haskell/directory/issues/180
-findExecutable :: String -> IO (Maybe FilePath)
-findExecutable exe = IO.catch (IO.findExecutable exe) $ \(_ :: IO.IOException) -> pure Nothing
=====================================
hadrian/src/Rules/Docspec.hs
=====================================
@@ -2,6 +2,8 @@ module Rules.Docspec
( docspecRules
) where
+import System.Directory (findExecutable)
+
import Base
import Context.Path
import Settings.Builders.Common
=====================================
hadrian/src/Rules/Lint.hs
=====================================
@@ -4,6 +4,7 @@ module Rules.Lint
import Base
import Settings.Builders.Common
+import System.Directory (findExecutable)
import System.Exit (exitFailure)
lintRules :: Rules ()
=====================================
hadrian/src/Settings/Builders/RunTest.hs
=====================================
@@ -16,6 +16,7 @@ import Settings.Builders.Common
import qualified Data.Set as Set
import Flavour
import qualified Context.Type as C
+import System.Directory (findExecutable)
import Settings.Program
import qualified Context.Type
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[Git][ghc/ghc][master] Use the correct field of ModOrigin when formatting error message listing hidden reexports
by Marge Bot (＠marge-bot) 22 Jan '26
by Marge Bot (＠marge-bot) 22 Jan '26
22 Jan '26
Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC
Commits:
3172db94 by Torsten Schmits at 2026-01-21T16:06:11-05:00
Use the correct field of ModOrigin when formatting error message listing hidden reexports
- - - - -
1 changed file:
- compiler/GHC/Unit/State.hs
Changes:
=====================================
compiler/GHC/Unit/State.hs
=====================================
@@ -215,7 +215,7 @@ instance Outputable ModuleOrigin where
(if null rhs
then []
else [text "hidden reexport by" <+>
- sep (map (ppr . mkUnit) res)]) ++
+ sep (map (ppr . mkUnit) rhs)]) ++
(if f then [text "package flag"] else [])
))
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/3172db940a11b1bae7490a2351f4154…
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22 Jan '26
Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC
Commits:
759fd15a by Andreas Klebinger at 2026-01-21T16:05:28-05:00
Don't build GHC with -Wcompat
Without bumping the boot compiler the warnings it produces are often not
actionable leading to pointless noise.
Fixes #26800
- - - - -
2 changed files:
- compiler/ghc.cabal.in
- hadrian/src/Settings/Builders/Ghc.hs
Changes:
=====================================
compiler/ghc.cabal.in
=====================================
@@ -149,6 +149,7 @@ Library
else
Build-Depends: unix >= 2.7 && < 2.9
+ -- Hadrian further set some warnings in its Settings.Warnings module.
GHC-Options: -Wall
-Wno-name-shadowing
-Wnoncanonical-monad-instances
=====================================
hadrian/src/Settings/Builders/Ghc.hs
=====================================
@@ -38,7 +38,6 @@ compileAndLinkHs = (builder (Ghc CompileHs) ||^ builder (Ghc LinkHs)) ? do
stage <- getStage
hie_path <- getHieBuildPath
mconcat [ arg "-Wall"
- , arg "-Wcompat"
, not useColor ? builder (Ghc CompileHs) ?
-- N.B. Target.trackArgument ignores this argument from the
-- input hash to avoid superfluous recompilation, avoiding
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/759fd15ad1eca1d8dd4838ba789ef74…
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[Git][ghc/ghc][wip/fix-ghc-experimental] Fix ghc-experimental GHC.Exception.Backtrace.Experimental module
by Matthew Pickering (＠mpickering) 22 Jan '26
by Matthew Pickering (＠mpickering) 22 Jan '26
22 Jan '26
Matthew Pickering pushed to branch wip/fix-ghc-experimental at Glasgow Haskell Compiler / GHC
Commits:
2e618759 by Matthew Pickering at 2026-01-21T18:21:50+00:00
Fix ghc-experimental GHC.Exception.Backtrace.Experimental module
This module wasn't added to the cabal file so it was never compiled or
included in the library.
- - - - -
4 changed files:
- libraries/ghc-experimental/ghc-experimental.cabal.in
- libraries/ghc-experimental/src/GHC/Exception/Backtrace/Experimental.hs
- testsuite/tests/interface-stability/ghc-experimental-exports.stdout
- testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32
Changes:
=====================================
libraries/ghc-experimental/ghc-experimental.cabal.in
=====================================
@@ -44,6 +44,7 @@ library
GHC.Stats.Experimental
Prelude.Experimental
System.Mem.Experimental
+ GHC.Exception.Backtrace.Experimental
if arch(wasm32)
exposed-modules: GHC.Wasm.Prim
other-extensions:
=====================================
libraries/ghc-experimental/src/GHC/Exception/Backtrace/Experimental.hs
=====================================
@@ -15,7 +15,7 @@ module GHC.Exception.Backtrace.Experimental
, getBacktraceMechanismState
, setBacktraceMechanismState
-- * Collecting backtraces
- , Backtraces(..),
+ , Backtraces(..)
, displayBacktraces
, collectBacktraces
-- * Collecting exception annotations on throwing 'Exception's
=====================================
testsuite/tests/interface-stability/ghc-experimental-exports.stdout
=====================================
@@ -4454,6 +4454,22 @@ module Data.Tuple.Experimental where
data Unit# = ...
getSolo :: forall a. Solo a -> a
+module GHC.Exception.Backtrace.Experimental where
+ -- Safety: None
+ type BacktraceMechanism :: *
+ data BacktraceMechanism = CostCentreBacktrace | HasCallStackBacktrace | ExecutionBacktrace | IPEBacktrace
+ type Backtraces :: *
+ data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot}
+ type CollectExceptionAnnotationMechanism :: *
+ data CollectExceptionAnnotationMechanism = ...
+ collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Internal.Types.IO Backtraces
+ collectExceptionAnnotation :: GHC.Internal.Stack.Types.HasCallStack => GHC.Internal.Types.IO GHC.Internal.Exception.Context.SomeExceptionAnnotation
+ displayBacktraces :: Backtraces -> GHC.Internal.Base.String
+ getBacktraceMechanismState :: BacktraceMechanism -> GHC.Internal.Types.IO GHC.Internal.Types.Bool
+ getCollectExceptionAnnotationMechanism :: GHC.Internal.Types.IO CollectExceptionAnnotationMechanism
+ setBacktraceMechanismState :: BacktraceMechanism -> GHC.Internal.Types.Bool -> GHC.Internal.Types.IO ()
+ setCollectExceptionAnnotation :: forall a. GHC.Internal.Exception.Context.ExceptionAnnotation a => (GHC.Internal.Stack.Types.HasCallStack => GHC.Internal.Types.IO a) -> GHC.Internal.Types.IO ()
+
module GHC.PrimOps where
-- Safety: Unsafe
(*#) :: Int# -> Int# -> Int#
@@ -11182,6 +11198,7 @@ instance GHC.Internal.Enum.Enum GHC.Internal.RTS.Flags.DoTrace -- Defined in ‘
instance GHC.Internal.Enum.Enum GHC.Internal.RTS.Flags.GiveGCStats -- Defined in ‘GHC.Internal.RTS.Flags’
instance GHC.Internal.Enum.Enum GHC.Internal.RTS.Flags.IoManagerFlag -- Defined in ‘GHC.Internal.RTS.Flags’
instance GHC.Internal.Enum.Enum GHC.Internal.IO.SubSystem.IoSubSystem -- Defined in ‘GHC.Internal.IO.SubSystem’
+instance GHC.Internal.Exception.Context.ExceptionAnnotation GHC.Internal.Exception.Backtrace.Backtraces -- Defined in ‘GHC.Internal.Exception.Backtrace’
instance forall a. GHC.Internal.Float.Floating a => GHC.Internal.Float.Floating (GHC.Internal.Data.Ord.Down a) -- Defined in ‘GHC.Internal.Data.Ord’
instance forall a. GHC.Internal.Float.RealFloat a => GHC.Internal.Float.RealFloat (GHC.Internal.Data.Ord.Down a) -- Defined in ‘GHC.Internal.Data.Ord’
instance forall a. GHC.Internal.Foreign.Storable.Storable a => GHC.Internal.Foreign.Storable.Storable (GHC.Internal.Data.Ord.Down a) -- Defined in ‘GHC.Internal.Data.Ord’
=====================================
testsuite/tests/interface-stability/ghc-experimental-exports.stdout-mingw32
=====================================
@@ -4454,6 +4454,22 @@ module Data.Tuple.Experimental where
data Unit# = ...
getSolo :: forall a. Solo a -> a
+module GHC.Exception.Backtrace.Experimental where
+ -- Safety: None
+ type BacktraceMechanism :: *
+ data BacktraceMechanism = CostCentreBacktrace | HasCallStackBacktrace | ExecutionBacktrace | IPEBacktrace
+ type Backtraces :: *
+ data Backtraces = Backtraces {btrCostCentre :: GHC.Internal.Maybe.Maybe (GHC.Internal.Ptr.Ptr GHC.Internal.Stack.CCS.CostCentreStack), btrHasCallStack :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.Types.CallStack, btrExecutionStack :: GHC.Internal.Maybe.Maybe GHC.Internal.ExecutionStack.Internal.StackTrace, btrIpe :: GHC.Internal.Maybe.Maybe GHC.Internal.Stack.CloneStack.StackSnapshot}
+ type CollectExceptionAnnotationMechanism :: *
+ data CollectExceptionAnnotationMechanism = ...
+ collectBacktraces :: (?callStack::GHC.Internal.Stack.Types.CallStack) => GHC.Internal.Types.IO Backtraces
+ collectExceptionAnnotation :: GHC.Internal.Stack.Types.HasCallStack => GHC.Internal.Types.IO GHC.Internal.Exception.Context.SomeExceptionAnnotation
+ displayBacktraces :: Backtraces -> GHC.Internal.Base.String
+ getBacktraceMechanismState :: BacktraceMechanism -> GHC.Internal.Types.IO GHC.Internal.Types.Bool
+ getCollectExceptionAnnotationMechanism :: GHC.Internal.Types.IO CollectExceptionAnnotationMechanism
+ setBacktraceMechanismState :: BacktraceMechanism -> GHC.Internal.Types.Bool -> GHC.Internal.Types.IO ()
+ setCollectExceptionAnnotation :: forall a. GHC.Internal.Exception.Context.ExceptionAnnotation a => (GHC.Internal.Stack.Types.HasCallStack => GHC.Internal.Types.IO a) -> GHC.Internal.Types.IO ()
+
module GHC.PrimOps where
-- Safety: Unsafe
(*#) :: Int# -> Int# -> Int#
@@ -11185,6 +11201,7 @@ instance GHC.Internal.Enum.Enum GHC.Internal.RTS.Flags.DoTrace -- Defined in ‘
instance GHC.Internal.Enum.Enum GHC.Internal.RTS.Flags.GiveGCStats -- Defined in ‘GHC.Internal.RTS.Flags’
instance GHC.Internal.Enum.Enum GHC.Internal.RTS.Flags.IoManagerFlag -- Defined in ‘GHC.Internal.RTS.Flags’
instance GHC.Internal.Enum.Enum GHC.Internal.IO.SubSystem.IoSubSystem -- Defined in ‘GHC.Internal.IO.SubSystem’
+instance GHC.Internal.Exception.Context.ExceptionAnnotation GHC.Internal.Exception.Backtrace.Backtraces -- Defined in ‘GHC.Internal.Exception.Backtrace’
instance forall a. GHC.Internal.Float.Floating a => GHC.Internal.Float.Floating (GHC.Internal.Data.Ord.Down a) -- Defined in ‘GHC.Internal.Data.Ord’
instance forall a. GHC.Internal.Float.RealFloat a => GHC.Internal.Float.RealFloat (GHC.Internal.Data.Ord.Down a) -- Defined in ‘GHC.Internal.Data.Ord’
instance forall a. GHC.Internal.Foreign.Storable.Storable a => GHC.Internal.Foreign.Storable.Storable (GHC.Internal.Data.Ord.Down a) -- Defined in ‘GHC.Internal.Data.Ord’
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[Git][ghc/ghc][wip/fix-ghc-experimental] 27 commits: testsuite: remove obsolete --ci option from the testsuite driver
by Matthew Pickering (＠mpickering) 22 Jan '26
by Matthew Pickering (＠mpickering) 22 Jan '26
22 Jan '26
Matthew Pickering pushed to branch wip/fix-ghc-experimental at Glasgow Haskell Compiler / GHC
Commits:
f25e2b12 by Cheng Shao at 2026-01-14T11:10:39-05:00
testsuite: remove obsolete --ci option from the testsuite driver
This patch removes the obsolete `--ci` option from the testsuite
driver: neither the CI scripts nor hadrian ever invokes the testsuite
driver with `--ci`, and the perf notes are always fetched to the
`refs/notes/perf` local reference anyway.
- - - - -
7964763b by Julian Ospald at 2026-01-14T11:11:31-05:00
Fix fetch_cabal
* download cabal if the existing one is of an older version
* fix FreeBSD download url
* fix unpacking on FreeBSD
- - - - -
6b0129c1 by Julian Ospald at 2026-01-14T11:11:31-05:00
Bump toolchain in CI
- - - - -
0f53ccc6 by Julian Ospald at 2026-01-14T11:11:31-05:00
Use libffi-clib
Previously, we would build libffi via hadrian
and bundle it manually with the GHC bindist.
This now moves all that logic out of hadrian
and allows us to have a clean Haskell package
to build and link against and ship it without
extra logic.
This patch still retains the ability to link
against a system libffi.
The main reason of bundling libffi was that on
some platforms (e.g. FreeBSD and Mac), system libffi
is not visible to the C toolchain by default,
so users would require settings in e.g. cabal
to be able to compile anything.
This adds the submodule libffi-clib to the repository.
- - - - -
5e1cd595 by Peng Fan at 2026-01-14T11:12:26-05:00
NCG/LA64: add support for la664 micro architecture
Add '-mla664' flag to LA664, which has some new features:
atomic instructions, dbar hints, etc.
'LA464' is the default so that unrecognized instructions are not
generated.
- - - - -
c56567ec by Simon Peyton Jones at 2026-01-15T23:19:04+00:00
Add evals for strict data-con args in worker-functions
This fixes #26722, by adding an eval in a worker for
arguments of strict data constructors, even if the
function body uses them strictly.
See (WIS1) in Note [Which Ids should be strictified]
I took the opportunity to make substantial improvements in the
documentation for call-by-value functions. See especially
Note [CBV Function Ids: overview] in GHC.Types.Id.Info
Note [Which Ids should be CBV candidates?] ditto
Note [EPT enforcement] in GHC.Stg.EnforceEpt
among others.
- - - - -
9719ce5d by Simon Peyton Jones at 2026-01-15T23:19:04+00:00
Improve `interestingArg`
This function analyses a function's argument to see if it is
interesting enough to deserve an inlining discount. Improvements
for
* LitRubbish arguments
* exprIsExpandable arguments
See Note [Interesting arguments] which is substantially rewritten.
- - - - -
7b616b9f by Cheng Shao at 2026-01-16T06:45:00-05:00
compiler: fix regression when compiling foreign stubs in the rts unit
This patch fixes a regression when compiling foreign stubs in the rts
unit introduced in 05e25647f72bc102061af3f20478aa72bff6ff6e. A simple
revert would fix it, but it's better to implement a proper fix with
comment for better understanding of the underlying problem, see the
added comment for explanation.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
c343ef64 by Sylvain Henry at 2026-01-16T06:45:51-05:00
base: remove GHC.JS.Prim.Internal.Build (#23432)
See accepted CLC proposal https://github.com/haskell/core-libraries-committee/issues/329
- - - - -
29c0aceb by Simon Peyton Jones at 2026-01-16T17:18:11-05:00
Improve newtype unwrapping
Ticket #26746 describes several relatively-minor shortcomings of newtype
unwrapping. This MR addresses them, while also (arguably) simplifying
the code a bit.
See new Note [Solving newtype equalities: overview]
and Note [Decomposing newtype equalities]
and Note [Eager newtype decomposition]
and Note [Even more eager newtype decomposition]
For some reason, on Windows only, runtime allocations decrease for test
T5205 (from 52k to 48k). I have not idea why. No change at all on Linux.
I'm just going to accept the change. (I saw this same effect in another
MR so I think it's a fault in the baseline.)
Metric Decrease:
T5205
- - - - -
8b59e62c by Andreas Klebinger at 2026-01-16T17:18:52-05:00
testsuite: Widen acceptance window for T5205.
Fixes #26782
- - - - -
9e5e0234 by mangoiv at 2026-01-17T06:03:03-05:00
add a new issue template for getting verified
To reduce spam created by new users, we will in future not grant
any rights but reporting issues to new users. That is why we will
have to be able to verify them. The added issue template serves that
purpose.
- - - - -
b18b2c42 by Cheng Shao at 2026-01-17T06:03:44-05:00
llvm: fix split sections for llvm backend
This patch fixes split sections for llvm backend:
- Pass missing `--data-sections`/`--function-sections` flags to
llc/opt.
- Use `@llvm.compiler.used` instead of `@llvm.used` to avoid sections
being unnecessarily retained at link-time.
Fixes #26770.
-------------------------
Metric Decrease:
libdir
size_hello_artifact
size_hello_unicode
-------------------------
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
ebf66f67 by Cheng Shao at 2026-01-17T13:16:50-05:00
Update autoconf scripts
Scripts taken from autoconf a2287c3041a3f2a204eb942e09c015eab00dc7dd
- - - - -
598624b9 by Andreas Klebinger at 2026-01-17T13:17:32-05:00
CString.hs: Update incorrect comment.
Fixes #26322
- - - - -
eea2036b by Cheng Shao at 2026-01-18T10:00:49-05:00
libraries: bump haskeline submodule to 0.8.4.1
This patch bumps the haskeline submodule to 0.8.4.1 which includes an
important fix for an ANSI handling bug on Windows
(https://github.com/haskell/haskeline/pull/126)
- - - - -
87d8f6c2 by Cheng Shao at 2026-01-18T10:01:30-05:00
hadrian: replace default -H32m/-H64m with -O64M to improve mutator productivity
Most hadrian build flavours pass `-H32m`/`-H64m` to GHC as
conventional wisdom to improve mutator productivity and reduce GC
overhead. They were inherited from the legacy Make build system, and
there used to be make flags to instrument a build process with
`-Rghc-timing` option to collect GC stats of each GHC run from stderr.
It's time to revisit whether there are better defaults for
`-H32m`/`-H64m`, and this patch changes it to `-O64M` which indeed
improves mutator productivity based on real statistics. `-O64M` is
more aggressive than `-H64m`; it allows the old generation to grow to
at least 64M before triggering major GC and reduces major GC runs.
The stats of a clean build with `validate` flavour and `-H64m`:
```
h64m.log
matched RTS stat lines: 5499
sum MUT cpu : 2400.808 s
sum GC cpu : 1378.292 s
sum MUT elapsed : 2788.253 s
sum GC elapsed : 1389.233 s
GC/MUT cpu ratio : 0.574 (GC is 57.4% of MUT)
GC/MUT elapsed ratio : 0.498 (GC is 49.8% of MUT)
GC fraction of (MUT+GC) cpu : 36.5%
GC fraction of (MUT+GC) elapsed : 33.3%
per-line GC/MUT cpu ratio: median 0.691, p90 1.777
per-line GC/MUT elapsed ratio: median 0.519, p90 1.081
```
The stats of a clean build with `validate` flavour and `-O64M`:
```
o64m.log
matched RTS stat lines: 5499
sum MUT cpu : 2377.383 s
sum GC cpu : 1127.146 s
sum MUT elapsed : 2758.857 s
sum GC elapsed : 1135.587 s
GC/MUT cpu ratio : 0.474 (GC is 47.4% of MUT)
GC/MUT elapsed ratio : 0.412 (GC is 41.2% of MUT)
GC fraction of (MUT+GC) cpu : 32.2%
GC fraction of (MUT+GC) elapsed : 29.2%
per-line GC/MUT cpu ratio: median 0.489, p90 1.099
per-line GC/MUT elapsed ratio: median 0.367, p90 0.806
```
Mutator time is roughly in the same ballpark, but GC CPU time has
reduced by 18.22%, and mutator productivity has increased from 63.5%
to 67.8%.
- - - - -
8372e13d by Cheng Shao at 2026-01-18T10:02:12-05:00
rts: remove unused .def files from rts/win32
This patch removes unused .def files from `rts/win32`, given we don't
build .dll files for rts/ghc-internal/ghc-prim at all. Even when we
resurrect win32 dll support at some point in the future, these .def
files still contain incorrect symbols anyway and won't be of any use.
- - - - -
f6af485d by Cheng Shao at 2026-01-18T10:03:19-05:00
.gitmodules: use gitlab mirror for the libffi-clib submodule
This patch fixes .gitmodules to use the gitlab mirror for the
libffi-clib submodule, to make it coherent with other submodules that
allow ghc developers to experiment with wip branches in submodules for
ghc patches. Fixes #26783.
- - - - -
41432d25 by Cheng Shao at 2026-01-18T10:05:13-05:00
hadrian: remove the horrible i386 speedHack
When hadrian builds certain rts objects for i386, there's a horrible
speedHack that forces -fno-PIC even for dynamic ways of those objects.
This is not compatible with newer versions of gcc/binutils as well as
clang/lld, and this patch removes it. Fixes #26792.
- - - - -
323eb8f0 by Cheng Shao at 2026-01-18T21:48:19-05:00
hadrian: enable split sections for cross stage0
This patch fixes a minor issue with `splitSectionsArgs` in hadrian:
previously, it's unconditionally disabled for stage0 libraries because
it's not going to be shipped in the final bindists. But it's only true
when not cross compiling. So for now we also need to enable it for
cross stage0 as well.
- - - - -
3fadfefe by Andreas Klebinger at 2026-01-18T21:49:01-05:00
RTS: Document -K behaviour better
- - - - -
30f442a9 by Teo Camarasu at 2026-01-20T13:57:26-05:00
base: don't expose GHC.Num.{BigNat, Integer, Natural}
We no longer expose GHC.Num.{BigNat, Integer, Natural} from base instead users should get these modules from ghc-bignum.
We make this change to insulate end users from changes to GHC's implementation of big numbers.
Implements CLC proposal 359: https://github.com/haskell/core-libraries-committee/issues/359
- - - - -
75a9053d by Teo Camarasu at 2026-01-20T13:58:07-05:00
base: deprecate GHC internals in GHC.Num
Implements CLC proposal: https://github.com/haskell/core-libraries-committee/issues/360
- - - - -
9534b032 by Andreas Klebinger at 2026-01-20T13:58:50-05:00
ghc-experimental: Update Changelog
I tried to reconstruct a high level overview of the changes and when
they were made since we introduced it.
Fixes #26506
Co-authored-by: Teo Camarasu <teofilcamarasu(a)gmail.com>
- - - - -
346f2f5a by Cheng Shao at 2026-01-20T13:59:30-05:00
hadrian: remove RTS options in ghc-in-ghci flavour
This patch removes the RTS options passed to ghc in ghc-in-ghci
flavour, to workaround command line argument handling issue in
hls/hie-boot that results in `-O64M` instead of `+RTS -O64M -RTS`
being passed to ghc. It's not a hadrian bug per se, since ghc's own
ghc-in-ghci multi repl works fine, but we should still make sure HLS
works. Closes #26801.
- - - - -
344e8da2 by Matthew Pickering at 2026-01-21T17:35:47+00:00
Fix ghc-experimental GHC.Exception.Backtrace.Experimental module
This module wasn't added to the cabal file so it was never compiled or
included in the library.
- - - - -
111 changed files:
- .gitlab/ci.sh
- .gitlab/generate-ci/gen_ci.hs
- + .gitlab/issue_templates/get-verified.md
- .gitlab/jobs.yaml
- .gitmodules
- compiler/GHC/CmmToAsm/Config.hs
- compiler/GHC/CmmToLlvm.hs
- compiler/GHC/CmmToLlvm/Base.hs
- compiler/GHC/Core/FamInstEnv.hs
- compiler/GHC/Core/Opt/Arity.hs
- compiler/GHC/Core/Opt/Simplify/Utils.hs
- compiler/GHC/Core/Opt/SpecConstr.hs
- compiler/GHC/Core/Opt/WorkWrap.hs
- compiler/GHC/Core/Opt/WorkWrap/Utils.hs
- compiler/GHC/Core/Tidy.hs
- compiler/GHC/Core/Unfold.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Driver/CodeOutput.hs
- compiler/GHC/Driver/Config/CmmToAsm.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Linker/Loader.hs
- compiler/GHC/Linker/Unit.hs
- compiler/GHC/Stg/EnforceEpt.hs
- compiler/GHC/Stg/Lint.hs
- compiler/GHC/StgToCmm/Closure.hs
- compiler/GHC/StgToCmm/Expr.hs
- compiler/GHC/Tc/Instance/Family.hs
- compiler/GHC/Tc/Solver/Equality.hs
- compiler/GHC/Tc/Solver/Monad.hs
- compiler/GHC/Types/Id.hs
- compiler/GHC/Types/Id/Info.hs
- compiler/GHC/Types/Id/Make.hs
- compiler/GHC/Unit/State.hs
- config.guess
- config.sub
- docs/users_guide/runtime_control.rst
- docs/users_guide/using.rst
- hadrian/doc/flavours.md
- hadrian/hadrian.cabal
- hadrian/src/Builder.hs
- hadrian/src/Packages.hs
- hadrian/src/Rules.hs
- hadrian/src/Rules/Documentation.hs
- hadrian/src/Rules/Generate.hs
- − hadrian/src/Rules/Libffi.hs
- hadrian/src/Rules/Register.hs
- hadrian/src/Rules/Rts.hs
- hadrian/src/Rules/SourceDist.hs
- hadrian/src/Settings/Builders/Cabal.hs
- hadrian/src/Settings/Builders/Ghc.hs
- hadrian/src/Settings/Builders/SplitSections.hs
- hadrian/src/Settings/Default.hs
- hadrian/src/Settings/Flavours/Benchmark.hs
- hadrian/src/Settings/Flavours/Development.hs
- hadrian/src/Settings/Flavours/GhcInGhci.hs
- hadrian/src/Settings/Flavours/Performance.hs
- hadrian/src/Settings/Flavours/Quick.hs
- hadrian/src/Settings/Flavours/QuickCross.hs
- hadrian/src/Settings/Flavours/Quickest.hs
- hadrian/src/Settings/Flavours/Validate.hs
- hadrian/src/Settings/Packages.hs
- − libffi-tarballs
- libraries/base/base.cabal.in
- libraries/base/changelog.md
- libraries/base/src/Data/Array/Byte.hs
- − libraries/base/src/GHC/JS/Prim/Internal/Build.hs
- libraries/base/src/GHC/Num.hs
- − libraries/base/src/GHC/Num/BigNat.hs
- − libraries/base/src/GHC/Num/Integer.hs
- − libraries/base/src/GHC/Num/Natural.hs
- libraries/base/src/System/CPUTime/Utils.hs
- libraries/ghc-bignum/ghc-bignum.cabal
- libraries/ghc-experimental/CHANGELOG.md
- libraries/ghc-experimental/ghc-experimental.cabal.in
- libraries/ghc-experimental/src/GHC/Exception/Backtrace/Experimental.hs
- libraries/ghc-experimental/src/GHC/TypeNats/Experimental.hs
- libraries/ghc-internal/src/GHC/Internal/CString.hs
- libraries/haskeline
- + libraries/libffi-clib
- packages
- rts/include/rts/ghc_ffi.h
- rts/rts.buildinfo.in
- rts/rts.cabal
- − rts/win32/libHSffi.def
- − rts/win32/libHSghc-internal.def
- − rts/win32/libHSghc-prim.def
- testsuite/driver/perf_notes.py
- testsuite/tests/deriving/should_fail/T8984.stderr
- testsuite/tests/deriving/should_fail/deriving-via-fail.stderr
- testsuite/tests/deriving/should_fail/deriving-via-fail4.stderr
- testsuite/tests/deriving/should_fail/deriving-via-fail5.stderr
- testsuite/tests/interface-stability/base-exports.stdout
- testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs
- testsuite/tests/interface-stability/base-exports.stdout-mingw32
- testsuite/tests/interface-stability/base-exports.stdout-ws-32
- testsuite/tests/interface-stability/ghc-experimental-exports.stdout
- testsuite/tests/perf/should_run/all.T
- testsuite/tests/simplCore/should_compile/T18013.stderr
- + testsuite/tests/simplCore/should_compile/T26722.hs
- + testsuite/tests/simplCore/should_compile/T26722.stderr
- testsuite/tests/simplCore/should_compile/all.T
- + testsuite/tests/typecheck/should_compile/T26746.hs
- testsuite/tests/typecheck/should_compile/all.T
- testsuite/tests/typecheck/should_fail/T15801.stderr
- testsuite/tests/typecheck/should_fail/T22924b.stderr
- testsuite/tests/typecheck/should_fail/TcCoercibleFail.hs
- testsuite/tests/typecheck/should_fail/TcCoercibleFail.stderr
- testsuite/tests/typecheck/should_fail/all.T
The diff was not included because it is too large.
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[Git][ghc/ghc][wip/t26751] 60 commits: Use half-word literals in info tables
by Matthew Pickering (＠mpickering) 22 Jan '26
by Matthew Pickering (＠mpickering) 22 Jan '26
22 Jan '26
Matthew Pickering pushed to branch wip/t26751 at Glasgow Haskell Compiler / GHC
Commits:
472df471 by Peter Trommler at 2026-01-08T13:28:54-05:00
Use half-word literals in info tables
With this commit info tables are mapped to the same assembler code
on big-endian and little-endian platforms.
Fixes #26579.
- - - - -
393f9c51 by Simon Peyton Jones at 2026-01-08T13:29:35-05:00
Refactor srutOkForBinderSwap
This MR does a small refactor:
* Moves `scrutOkForBinderSwap` and `BinderSwapDecision`
to GHC.Core.Utils
* Inverts the sense of the coercion it returns, which makes
more sense
No effect on behaviour
- - - - -
ad76fb0f by Simon Peyton Jones at 2026-01-08T13:29:36-05:00
Improve case merging
This small MR makes case merging happen a bit more often than
it otherwise could, by getting join points out of the way.
See #26709 and GHC.Core.Utils
Note [Floating join points out of DEFAULT alternatives]
- - - - -
4c9395f5 by Cheng Shao at 2026-01-08T13:30:16-05:00
hadrian: remove broken hsc2hs flag when cross compiling to windows
This patch removes the `--via-asm` hsc2hs flag when cross compiling to
windows. With recent llvm-mingw toolchain, it would fail with:
```
x86_64-w64-mingw32-hsc2hs: Cannot combine instructions: [Quad 8,Long 4,Long 241,Ref ".Ltmp1-.Ltmp0"]
```
The hsc2hs default `--cross-compile` logic is slower but works.
- - - - -
71fdef55 by Simon Peyton Jones at 2026-01-08T13:30:57-05:00
Try harder to keep the substitution empty
Avoid unnecessary cloning of variables in the Simplifier.
Addresses #26724,
See Note [Keeping the substitution empty]
We get some big wins in compile time
Metrics: compile_time/bytes allocated
-------------------------------------
Baseline
Test Metric value New value Change
----------------------------------------------------------------------------
CoOpt_Singletons(normal) ghc/alloc 721,544,088 692,174,216 -4.1% GOOD
LargeRecord(normal) ghc/alloc 1,268,031,157 1,265,168,448 -0.2%
T14766(normal) ghc/alloc 918,218,533 688,432,296 -25.0% GOOD
T15703(normal) ghc/alloc 318,103,629 306,638,016 -3.6% GOOD
T17836(normal) ghc/alloc 419,174,584 418,400,824 -0.2%
T18478(normal) ghc/alloc 471,042,976 470,261,376 -0.2%
T20261(normal) ghc/alloc 573,387,162 563,663,336 -1.7%
T24984(normal) ghc/alloc 87,832,666 87,636,168 -0.2%
T25196(optasm) ghc/alloc 1,103,284,040 1,101,376,992 -0.2%
hard_hole_fits(normal) ghc/alloc 224,981,413 224,608,208 -0.2%
geo. mean -0.3%
minimum -25.0%
maximum +0.1%
Metric Decrease:
CoOpt_Singletons
T14766
T15703
- - - - -
30341168 by Simon Peyton Jones at 2026-01-08T13:31:38-05:00
Add regression test for #24867
- - - - -
1ac1a541 by Julian Ospald at 2026-01-09T02:48:53-05:00
Support statically linking executables properly
Fixes #26434
In detail, this does a number of things:
* Makes GHC aware of 'extra-libraries-static' (this changes the package
database format).
* Adds a switch '-static-external' that will honour 'extra-libraries-static'
to link external system dependencies statically.
* Adds a new field to settings/targets: "ld supports verbatim namespace".
This field is used by '-static-external' to conditionally use '-l:foo.a'
syntax during linking, which is more robust than trying to find the
absolute path to an archive on our own.
* Adds a switch '-fully-static' that is meant as a high-level interface
for e.g. cabal. This also honours 'extra-libraries-static'.
This also attempts to clean up the confusion around library search directories.
At the moment, we have 3 types of directories in the package database
format:
* library-dirs
* library-dirs-static
* dynamic-library-dirs
However, we only have two types of linking: dynamic or static. Given the
existing logic in 'mungeDynLibFields', this patch assumes that
'library-dirs' is really just nothing but a fallback and always
prefers the more specific variants if they exist and are non-empty.
Conceptually, we should be ok with even just one search dirs variant.
Haskell libraries are named differently depending on whether they're
static or dynamic, so GHC can conveniently pick the right one depending
on the linking needs. That means we don't really need to play tricks
with search paths to convince the compiler to do linking as we want it.
For system C libraries, the convention has been anyway to place static and
dynamic libs next to each other, so we need to deal with that issue
anyway and it is outside of our control. But this is out of the scope
of this patch.
This patch is backwards compatible with cabal. Cabal should however
be patched to use the new '-fully-static' switch.
- - - - -
ad3c808d by Julian Ospald at 2026-01-09T02:48:53-05:00
Warn when "-dynamic" is mixed with "-staticlib"
- - - - -
322dd672 by Matthew Pickering at 2026-01-09T02:49:35-05:00
rts: Use INFO_TABLE_CONSTR for stg_dummy_ret_closure
Since the closure type is CONSTR_NOCAF, we need to use INFO_TABLE_CONSTR
to populate the constructor description field (this crashes ghc-debug
when decoding AP_STACK frames sometimes)
Fixes #26745
- - - - -
039bac4c by Ben Gamari at 2026-01-09T20:22:16-05:00
ghc-internal: Move STM utilities out of GHC.Internal.Conc.Sync
This is necessary to avoid an import cycle on Windows when importing
`GHC.Internal.Exception.Context` in `GHC.Internal.Conc.Sync`.
On the road to address #25365.
- - - - -
8c389e8c by Ben Gamari at 2026-01-09T20:22:16-05:00
base: Capture backtrace from throwSTM
Implements core-libraries-committee#297.
Fixes #25365.
- - - - -
e1ce1fc3 by Ben Gamari at 2026-01-09T20:22:16-05:00
base: Annotate rethrown exceptions in catchSTM with WhileHandling
Implements core-libraries-committee#298
- - - - -
c4ebdbdf by Cheng Shao at 2026-01-09T20:23:06-05:00
compiler: make getPrim eagerly evaluate its result
This commit makes `GHC.Utils.Binary.getPrim` eagerly evaluate its
result, to avoid accidental laziness when future patches build other
binary parsers using `getPrim`.
- - - - -
66a0c4f7 by Cheng Shao at 2026-01-09T20:23:06-05:00
compiler: implement fast get/put for Word16/Word32/Word64
Previously, `GHC.Utils.Binary` contains `get`/`put` functions for
`Word16`/`Word32`/`Word64` which always loads and stores them as
big-endian words at a potentially unaligned address. The previous
implementation is based on loads/stores of individual bytes and
concatenating bytes with bitwise operations, which currently cannot be
fused to a single load/store operation by GHC.
This patch implements fast `get`/`put` functions for
`Word16`/`Word32`/`Word64` based on a single memory load/store, with
an additional `byteSwap` operation on little-endian hosts. It is based
on unaligned load/store primops added since GHC 9.10, and we already
require booting with at least 9.10, so it's about time to switch to
this faster path.
- - - - -
641ec3f0 by Simon Peyton Jones at 2026-01-09T20:23:55-05:00
Fix scoping errors in specialisation
Using -fspecialise-aggressively in #26682 showed up a couple of
subtle errors in the type-class specialiser.
* dumpBindUDs failed to call `deleteCallsMentioning`, resulting in a
call that mentioned a dictionary that was not in scope. This call
has been missing since 2009!
commit c43c981705ec33da92a9ce91eb90f2ecf00be9fe
Author: Simon Peyton Jones <simonpj(a)microsoft.com>
Date: Fri Oct 23 16:15:51 2009 +0000
Fixed by re-combining `dumpBindUDs` and `dumpUDs`.
* I think there was another bug involving the quantified type
variables in polymorphic specialisation. In any case I refactored
`specHeader` and `spec_call` so that the former looks for the
extra quantified type variables rather than the latter. This
is quite a worthwhile simplification: less code, easier to grok.
Test case in simplCore/should_compile/T26682,
brilliantly minimised by @sheaf.
- - - - -
2433e91d by Cheng Shao at 2026-01-09T20:24:43-05:00
compiler: change sectionProtection to take SectionType argument
This commit changes `sectionProtection` to only take `SectionType`
argument instead of whole `Section`, since it doesn't need the Cmm
section content anyway, and it can then be called in parts of NCG
where we only have a `SectionType` in scope.
- - - - -
e5926fbe by Cheng Shao at 2026-01-09T20:24:43-05:00
compiler: change isInitOrFiniSection to take SectionType argument
This commit changes `isInitOrFiniSection` to only take `SectionType`
argument instead of whole `Section`, since it doesn't need the Cmm
section content anyway, and it can then be called in parts of NCG
where we only have a `SectionType` in scope. Also marks it as
exported.
- - - - -
244d57d7 by Cheng Shao at 2026-01-09T20:24:43-05:00
compiler: fix split sections on windows
This patch fixes split sections on windows by emitting the right
COMDAT section header in NCG, see added comment for more explanation.
Fix #26696 #26494.
-------------------------
Metric Decrease:
LargeRecord
T9675
size_hello_artifact
size_hello_artifact_gzip
size_hello_unicode
size_hello_unicode_gzip
Metric Increase:
T13035
-------------------------
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
182f3d0f by Cheng Shao at 2026-01-09T20:25:28-05:00
iserv: add comment about -fkeep-cafs
- - - - -
49675b69 by Matthew Craven at 2026-01-09T20:26:14-05:00
Account for "stupid theta" in demand sig for DataCon wrappers
Fixes #26748.
- - - - -
f3c18890 by Samuel Thibault at 2026-01-10T15:48:22+01:00
hurd: Fix getExecutablePath build
3939a8bf93e27 ("GNU/Hurd: Add getExecutablePath support") added using
/proc/self/exe for GNU/Hurd but missed adding the required imports for
the corresponding code.
- - - - -
7f15bd15 by Samuel Thibault at 2026-01-12T07:16:25-05:00
Fix the OS string encoding for GNU/Hurd
Following https://github.com/haskell/cabal/pull/9434/files , and as seen
in the various gnu_HOST_OS usages in the source code, it is expected that
GNU/Hurd is advertised as "gnu", like the autotools do.
- - - - -
1db2f240 by Andrew Lelechenko at 2026-01-12T07:17:06-05:00
Add since annotation for Data.Bifoldable1
Fixes #26432
- - - - -
e038a383 by Sven Tennie at 2026-01-12T07:17:49-05:00
Ignore Windows CI tool directories in Git
Otherwise, we see thousands of changes in `git status` which is very
confusing to work with.
- - - - -
023c301c by sheaf at 2026-01-13T04:57:30-05:00
Don't re-use stack slots for growing registers
This commit avoids re-using a stack slot for a register that has grown
but already had a stack slot.
For example, suppose we have stack slot assigments
%v1 :: FF64 |-> StackSlot 0
%v2 :: FF64 |-> StackSlot 1
Later, we start using %v1 at a larger format (e.g. F64x2) and we need
to spill it again. Then we **must not** use StackSlot 0, as a spill
at format F64x2 would clobber the data in StackSlot 1.
This can cause some fragmentation of the `StackMap`, but that's probably
OK.
Fixes #26668
- - - - -
d0966e64 by fendor at 2026-01-13T04:58:11-05:00
Remove `traceId` from ghc-pkg executable
- - - - -
20d7efec by Simon Peyton Jones at 2026-01-13T12:41:22-05:00
Make SpecContr rules fire a bit later
See #26615 and Note [SpecConstr rule activation]
- - - - -
8bc4eb8c by Andrew Lelechenko at 2026-01-13T12:42:03-05:00
Upgrade mtl submodule to 2.3.2
Fixes #26656
- - - - -
c94aaacd by Cheng Shao at 2026-01-13T12:42:44-05:00
compiler: remove iserv and only use on-demand external interpreter
This patch removes `iserv` from the tree completely. Hadrian would no
longer build or distribute `iserv`, and the GHC driver would use the
on-demand external interpreter by default when invoked with
`-fexternal-interpreter`, without needing to specify `-pgmi ""`. This
has multiple benefits:
- It allows cleanup of a lot of legacy hacks in the hadrian codebase.
- It paves the way for running cross ghc's iserv via cross emulator
(#25523), fixing TH/ghci support for cross targets other than
wasm/js.
- - - - -
c1fe0097 by Peter Trommler at 2026-01-14T03:54:49-05:00
PPC NCG: Fix shift right MO code
The shift amount in shift right [arithmetic] MOs is machine word
width. Therefore remove unnecessary zero- or sign-extending of
shift amount.
It looks harmless to extend the shift amount argument because the
shift right instruction uses only the seven lowest bits (i. e. mod 128).
But now we have a conversion operation from a smaller type to word width
around a memory load at word width. The types are not matching up but
there is no check done in CodeGen. The necessary conversion from word
width down to the smaller width would be translated into a no-op on
PowerPC anyway. So all seems harmless if it was not for a small
optimisation in getRegister'.
In getRegister' a load instruction with the smaller width of the
conversion operation was generated. This loaded the most significant
bits of the word in memory on a big-endian platform. These bits were
zero and hence shift right was used with shift amount zero and not one
as required in test Sized.
Fixes #26519
- - - - -
2dafc65a by Cheng Shao at 2026-01-14T03:55:31-05:00
Tree-wide cleanup of cygwin logic
GHC has not supported cygwin for quite a few years already, and will
not resume support in the forseeable future. The only supported
windows toolchain is clang64/clangarm64 of the msys2 project. This
patch cleans up the unused cygwin logic in the tree.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
66b96e2a by Teo Camarasu at 2026-01-14T03:56:13-05:00
Set default eventlog-flush-interval to 5s
Resolves #26707
- - - - -
d0254579 by Andrew Lelechenko at 2026-01-14T03:56:53-05:00
Document when -maxN RTS option was added
- - - - -
f25e2b12 by Cheng Shao at 2026-01-14T11:10:39-05:00
testsuite: remove obsolete --ci option from the testsuite driver
This patch removes the obsolete `--ci` option from the testsuite
driver: neither the CI scripts nor hadrian ever invokes the testsuite
driver with `--ci`, and the perf notes are always fetched to the
`refs/notes/perf` local reference anyway.
- - - - -
7964763b by Julian Ospald at 2026-01-14T11:11:31-05:00
Fix fetch_cabal
* download cabal if the existing one is of an older version
* fix FreeBSD download url
* fix unpacking on FreeBSD
- - - - -
6b0129c1 by Julian Ospald at 2026-01-14T11:11:31-05:00
Bump toolchain in CI
- - - - -
0f53ccc6 by Julian Ospald at 2026-01-14T11:11:31-05:00
Use libffi-clib
Previously, we would build libffi via hadrian
and bundle it manually with the GHC bindist.
This now moves all that logic out of hadrian
and allows us to have a clean Haskell package
to build and link against and ship it without
extra logic.
This patch still retains the ability to link
against a system libffi.
The main reason of bundling libffi was that on
some platforms (e.g. FreeBSD and Mac), system libffi
is not visible to the C toolchain by default,
so users would require settings in e.g. cabal
to be able to compile anything.
This adds the submodule libffi-clib to the repository.
- - - - -
5e1cd595 by Peng Fan at 2026-01-14T11:12:26-05:00
NCG/LA64: add support for la664 micro architecture
Add '-mla664' flag to LA664, which has some new features:
atomic instructions, dbar hints, etc.
'LA464' is the default so that unrecognized instructions are not
generated.
- - - - -
c56567ec by Simon Peyton Jones at 2026-01-15T23:19:04+00:00
Add evals for strict data-con args in worker-functions
This fixes #26722, by adding an eval in a worker for
arguments of strict data constructors, even if the
function body uses them strictly.
See (WIS1) in Note [Which Ids should be strictified]
I took the opportunity to make substantial improvements in the
documentation for call-by-value functions. See especially
Note [CBV Function Ids: overview] in GHC.Types.Id.Info
Note [Which Ids should be CBV candidates?] ditto
Note [EPT enforcement] in GHC.Stg.EnforceEpt
among others.
- - - - -
9719ce5d by Simon Peyton Jones at 2026-01-15T23:19:04+00:00
Improve `interestingArg`
This function analyses a function's argument to see if it is
interesting enough to deserve an inlining discount. Improvements
for
* LitRubbish arguments
* exprIsExpandable arguments
See Note [Interesting arguments] which is substantially rewritten.
- - - - -
7b616b9f by Cheng Shao at 2026-01-16T06:45:00-05:00
compiler: fix regression when compiling foreign stubs in the rts unit
This patch fixes a regression when compiling foreign stubs in the rts
unit introduced in 05e25647f72bc102061af3f20478aa72bff6ff6e. A simple
revert would fix it, but it's better to implement a proper fix with
comment for better understanding of the underlying problem, see the
added comment for explanation.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
c343ef64 by Sylvain Henry at 2026-01-16T06:45:51-05:00
base: remove GHC.JS.Prim.Internal.Build (#23432)
See accepted CLC proposal https://github.com/haskell/core-libraries-committee/issues/329
- - - - -
29c0aceb by Simon Peyton Jones at 2026-01-16T17:18:11-05:00
Improve newtype unwrapping
Ticket #26746 describes several relatively-minor shortcomings of newtype
unwrapping. This MR addresses them, while also (arguably) simplifying
the code a bit.
See new Note [Solving newtype equalities: overview]
and Note [Decomposing newtype equalities]
and Note [Eager newtype decomposition]
and Note [Even more eager newtype decomposition]
For some reason, on Windows only, runtime allocations decrease for test
T5205 (from 52k to 48k). I have not idea why. No change at all on Linux.
I'm just going to accept the change. (I saw this same effect in another
MR so I think it's a fault in the baseline.)
Metric Decrease:
T5205
- - - - -
8b59e62c by Andreas Klebinger at 2026-01-16T17:18:52-05:00
testsuite: Widen acceptance window for T5205.
Fixes #26782
- - - - -
9e5e0234 by mangoiv at 2026-01-17T06:03:03-05:00
add a new issue template for getting verified
To reduce spam created by new users, we will in future not grant
any rights but reporting issues to new users. That is why we will
have to be able to verify them. The added issue template serves that
purpose.
- - - - -
b18b2c42 by Cheng Shao at 2026-01-17T06:03:44-05:00
llvm: fix split sections for llvm backend
This patch fixes split sections for llvm backend:
- Pass missing `--data-sections`/`--function-sections` flags to
llc/opt.
- Use `@llvm.compiler.used` instead of `@llvm.used` to avoid sections
being unnecessarily retained at link-time.
Fixes #26770.
-------------------------
Metric Decrease:
libdir
size_hello_artifact
size_hello_unicode
-------------------------
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
ebf66f67 by Cheng Shao at 2026-01-17T13:16:50-05:00
Update autoconf scripts
Scripts taken from autoconf a2287c3041a3f2a204eb942e09c015eab00dc7dd
- - - - -
598624b9 by Andreas Klebinger at 2026-01-17T13:17:32-05:00
CString.hs: Update incorrect comment.
Fixes #26322
- - - - -
eea2036b by Cheng Shao at 2026-01-18T10:00:49-05:00
libraries: bump haskeline submodule to 0.8.4.1
This patch bumps the haskeline submodule to 0.8.4.1 which includes an
important fix for an ANSI handling bug on Windows
(https://github.com/haskell/haskeline/pull/126)
- - - - -
87d8f6c2 by Cheng Shao at 2026-01-18T10:01:30-05:00
hadrian: replace default -H32m/-H64m with -O64M to improve mutator productivity
Most hadrian build flavours pass `-H32m`/`-H64m` to GHC as
conventional wisdom to improve mutator productivity and reduce GC
overhead. They were inherited from the legacy Make build system, and
there used to be make flags to instrument a build process with
`-Rghc-timing` option to collect GC stats of each GHC run from stderr.
It's time to revisit whether there are better defaults for
`-H32m`/`-H64m`, and this patch changes it to `-O64M` which indeed
improves mutator productivity based on real statistics. `-O64M` is
more aggressive than `-H64m`; it allows the old generation to grow to
at least 64M before triggering major GC and reduces major GC runs.
The stats of a clean build with `validate` flavour and `-H64m`:
```
h64m.log
matched RTS stat lines: 5499
sum MUT cpu : 2400.808 s
sum GC cpu : 1378.292 s
sum MUT elapsed : 2788.253 s
sum GC elapsed : 1389.233 s
GC/MUT cpu ratio : 0.574 (GC is 57.4% of MUT)
GC/MUT elapsed ratio : 0.498 (GC is 49.8% of MUT)
GC fraction of (MUT+GC) cpu : 36.5%
GC fraction of (MUT+GC) elapsed : 33.3%
per-line GC/MUT cpu ratio: median 0.691, p90 1.777
per-line GC/MUT elapsed ratio: median 0.519, p90 1.081
```
The stats of a clean build with `validate` flavour and `-O64M`:
```
o64m.log
matched RTS stat lines: 5499
sum MUT cpu : 2377.383 s
sum GC cpu : 1127.146 s
sum MUT elapsed : 2758.857 s
sum GC elapsed : 1135.587 s
GC/MUT cpu ratio : 0.474 (GC is 47.4% of MUT)
GC/MUT elapsed ratio : 0.412 (GC is 41.2% of MUT)
GC fraction of (MUT+GC) cpu : 32.2%
GC fraction of (MUT+GC) elapsed : 29.2%
per-line GC/MUT cpu ratio: median 0.489, p90 1.099
per-line GC/MUT elapsed ratio: median 0.367, p90 0.806
```
Mutator time is roughly in the same ballpark, but GC CPU time has
reduced by 18.22%, and mutator productivity has increased from 63.5%
to 67.8%.
- - - - -
8372e13d by Cheng Shao at 2026-01-18T10:02:12-05:00
rts: remove unused .def files from rts/win32
This patch removes unused .def files from `rts/win32`, given we don't
build .dll files for rts/ghc-internal/ghc-prim at all. Even when we
resurrect win32 dll support at some point in the future, these .def
files still contain incorrect symbols anyway and won't be of any use.
- - - - -
f6af485d by Cheng Shao at 2026-01-18T10:03:19-05:00
.gitmodules: use gitlab mirror for the libffi-clib submodule
This patch fixes .gitmodules to use the gitlab mirror for the
libffi-clib submodule, to make it coherent with other submodules that
allow ghc developers to experiment with wip branches in submodules for
ghc patches. Fixes #26783.
- - - - -
41432d25 by Cheng Shao at 2026-01-18T10:05:13-05:00
hadrian: remove the horrible i386 speedHack
When hadrian builds certain rts objects for i386, there's a horrible
speedHack that forces -fno-PIC even for dynamic ways of those objects.
This is not compatible with newer versions of gcc/binutils as well as
clang/lld, and this patch removes it. Fixes #26792.
- - - - -
323eb8f0 by Cheng Shao at 2026-01-18T21:48:19-05:00
hadrian: enable split sections for cross stage0
This patch fixes a minor issue with `splitSectionsArgs` in hadrian:
previously, it's unconditionally disabled for stage0 libraries because
it's not going to be shipped in the final bindists. But it's only true
when not cross compiling. So for now we also need to enable it for
cross stage0 as well.
- - - - -
3fadfefe by Andreas Klebinger at 2026-01-18T21:49:01-05:00
RTS: Document -K behaviour better
- - - - -
30f442a9 by Teo Camarasu at 2026-01-20T13:57:26-05:00
base: don't expose GHC.Num.{BigNat, Integer, Natural}
We no longer expose GHC.Num.{BigNat, Integer, Natural} from base instead users should get these modules from ghc-bignum.
We make this change to insulate end users from changes to GHC's implementation of big numbers.
Implements CLC proposal 359: https://github.com/haskell/core-libraries-committee/issues/359
- - - - -
75a9053d by Teo Camarasu at 2026-01-20T13:58:07-05:00
base: deprecate GHC internals in GHC.Num
Implements CLC proposal: https://github.com/haskell/core-libraries-committee/issues/360
- - - - -
9534b032 by Andreas Klebinger at 2026-01-20T13:58:50-05:00
ghc-experimental: Update Changelog
I tried to reconstruct a high level overview of the changes and when
they were made since we introduced it.
Fixes #26506
Co-authored-by: Teo Camarasu <teofilcamarasu(a)gmail.com>
- - - - -
346f2f5a by Cheng Shao at 2026-01-20T13:59:30-05:00
hadrian: remove RTS options in ghc-in-ghci flavour
This patch removes the RTS options passed to ghc in ghc-in-ghci
flavour, to workaround command line argument handling issue in
hls/hie-boot that results in `-O64M` instead of `+RTS -O64M -RTS`
being passed to ghc. It's not a hadrian bug per se, since ghc's own
ghc-in-ghci multi repl works fine, but we should still make sure HLS
works. Closes #26801.
- - - - -
ceca37f9 by Matthew Pickering at 2026-01-21T17:16:12+00:00
Evaluate backtraces for "error" exceptions at the moment they are thrown
See Note [Capturing the backtrace in throw] and
Note [Hiding precise exception signature in throw] which explain the
implementation.
This commit makes `error` and `throw` behave the same with regard to
backtraces. Previously, exceptions raised by `error` would not contain
useful IPE backtraces.
I did try and implement `error` in terms of `throw` but it started to
involve putting diverging functions into hs-boot files, which seemed to
risky if the compiler wouldn't be able to see if applying a function
would diverge.
CLC proposal: https://github.com/haskell/core-libraries-committee/issues/383
Fixes #26751
- - - - -
252 changed files:
- .gitignore
- .gitlab/ci.sh
- .gitlab/generate-ci/gen_ci.hs
- + .gitlab/issue_templates/get-verified.md
- .gitlab/jobs.yaml
- .gitmodules
- CODEOWNERS
- cabal.project-reinstall
- compiler/GHC/Cmm.hs
- compiler/GHC/Cmm/Info.hs
- compiler/GHC/Cmm/InitFini.hs
- compiler/GHC/Cmm/Utils.hs
- compiler/GHC/CmmToAsm/AArch64/Ppr.hs
- compiler/GHC/CmmToAsm/Config.hs
- compiler/GHC/CmmToAsm/PPC/CodeGen.hs
- compiler/GHC/CmmToAsm/Ppr.hs
- compiler/GHC/CmmToAsm/Reg/Linear.hs
- compiler/GHC/CmmToAsm/Reg/Linear/StackMap.hs
- compiler/GHC/CmmToAsm/Wasm/FromCmm.hs
- compiler/GHC/CmmToAsm/X86/Ppr.hs
- compiler/GHC/CmmToC.hs
- compiler/GHC/CmmToLlvm.hs
- compiler/GHC/CmmToLlvm/Base.hs
- compiler/GHC/CmmToLlvm/Data.hs
- compiler/GHC/Core/FamInstEnv.hs
- compiler/GHC/Core/Opt/Arity.hs
- compiler/GHC/Core/Opt/OccurAnal.hs
- compiler/GHC/Core/Opt/Simplify/Env.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Opt/Simplify/Utils.hs
- compiler/GHC/Core/Opt/SpecConstr.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Core/Opt/WorkWrap.hs
- compiler/GHC/Core/Opt/WorkWrap/Utils.hs
- compiler/GHC/Core/Rules.hs
- compiler/GHC/Core/Subst.hs
- compiler/GHC/Core/Tidy.hs
- compiler/GHC/Core/TyCo/Subst.hs
- compiler/GHC/Core/Unfold.hs
- compiler/GHC/Core/Unfold/Make.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Driver/Backpack.hs
- compiler/GHC/Driver/CodeOutput.hs
- compiler/GHC/Driver/Config/CmmToAsm.hs
- compiler/GHC/Driver/Config/Interpreter.hs
- compiler/GHC/Driver/Downsweep.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/MakeFile.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Linker/Dynamic.hs
- compiler/GHC/Linker/Executable.hs
- compiler/GHC/Linker/Loader.hs
- compiler/GHC/Linker/Unit.hs
- compiler/GHC/Runtime/Interpreter/Init.hs
- compiler/GHC/Settings.hs
- compiler/GHC/Settings/IO.hs
- compiler/GHC/Stg/EnforceEpt.hs
- compiler/GHC/Stg/Lint.hs
- compiler/GHC/StgToCmm/Closure.hs
- compiler/GHC/StgToCmm/Expr.hs
- compiler/GHC/StgToJS/Linker/Utils.hs
- compiler/GHC/SysTools/Terminal.hs
- compiler/GHC/Tc/Instance/Family.hs
- compiler/GHC/Tc/Solver/Equality.hs
- compiler/GHC/Tc/Solver/Monad.hs
- compiler/GHC/Types/Id.hs
- compiler/GHC/Types/Id/Info.hs
- compiler/GHC/Types/Id/Make.hs
- compiler/GHC/Unit/Info.hs
- compiler/GHC/Unit/State.hs
- compiler/GHC/Utils/Binary.hs
- config.guess
- config.sub
- configure.ac
- distrib/configure.ac.in
- docs/users_guide/9.16.1-notes.rst
- docs/users_guide/ghci.rst
- docs/users_guide/packages.rst
- docs/users_guide/phases.rst
- docs/users_guide/runtime_control.rst
- docs/users_guide/using-concurrent.rst
- docs/users_guide/using.rst
- docs/users_guide/win32-dlls.rst
- driver/ghci/ghci.c
- driver/utils/cwrapper.c
- driver/utils/isMinTTY.c
- ghc/Main.hs
- hadrian/bindist/cwrappers/cwrapper.c
- hadrian/cfg/default.host.target.in
- hadrian/cfg/default.target.in
- hadrian/doc/flavours.md
- hadrian/doc/user-settings.md
- hadrian/hadrian.cabal
- hadrian/src/Builder.hs
- hadrian/src/Packages.hs
- hadrian/src/Rules.hs
- hadrian/src/Rules/BinaryDist.hs
- hadrian/src/Rules/CabalReinstall.hs
- hadrian/src/Rules/Documentation.hs
- hadrian/src/Rules/Generate.hs
- − hadrian/src/Rules/Libffi.hs
- hadrian/src/Rules/Program.hs
- hadrian/src/Rules/Register.hs
- hadrian/src/Rules/Rts.hs
- hadrian/src/Rules/SourceDist.hs
- hadrian/src/Rules/Test.hs
- hadrian/src/Settings/Builders/Cabal.hs
- hadrian/src/Settings/Builders/Ghc.hs
- hadrian/src/Settings/Builders/Hsc2Hs.hs
- hadrian/src/Settings/Builders/SplitSections.hs
- hadrian/src/Settings/Default.hs
- hadrian/src/Settings/Flavours/Benchmark.hs
- hadrian/src/Settings/Flavours/Development.hs
- hadrian/src/Settings/Flavours/GhcInGhci.hs
- hadrian/src/Settings/Flavours/Performance.hs
- hadrian/src/Settings/Flavours/Quick.hs
- hadrian/src/Settings/Flavours/QuickCross.hs
- hadrian/src/Settings/Flavours/Quickest.hs
- hadrian/src/Settings/Flavours/Validate.hs
- hadrian/src/Settings/Packages.hs
- hadrian/src/Settings/Program.hs
- − libffi-tarballs
- libraries/base/base.cabal.in
- libraries/base/changelog.md
- libraries/base/src/Data/Array/Byte.hs
- libraries/base/src/Data/Bifoldable1.hs
- libraries/base/src/GHC/Conc.hs
- libraries/base/src/GHC/Conc/Sync.hs
- − libraries/base/src/GHC/JS/Prim/Internal/Build.hs
- libraries/base/src/GHC/Num.hs
- − libraries/base/src/GHC/Num/BigNat.hs
- − libraries/base/src/GHC/Num/Integer.hs
- − libraries/base/src/GHC/Num/Natural.hs
- libraries/base/src/System/CPUTime/Utils.hs
- libraries/base/tests/IO/T12010/cbits/initWinSock.c
- libraries/ghc-bignum/ghc-bignum.cabal
- libraries/ghc-boot/GHC/Unit/Database.hs
- libraries/ghc-experimental/CHANGELOG.md
- libraries/ghc-experimental/ghc-experimental.cabal.in
- libraries/ghc-experimental/src/GHC/TypeNats/Experimental.hs
- libraries/ghc-internal/cbits/consUtils.c
- libraries/ghc-internal/configure.ac
- libraries/ghc-internal/ghc-internal.buildinfo.in
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/src/GHC/Internal/CString.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/Sync.hs
- libraries/ghc-internal/src/GHC/Internal/Conc/Sync.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Conc/Windows.hs
- libraries/ghc-internal/src/GHC/Internal/ConsoleHandler.hsc
- libraries/ghc-internal/src/GHC/Internal/Err.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Thread.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Windows/Thread.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle.hs
- + libraries/ghc-internal/src/GHC/Internal/STM.hs
- libraries/ghc-internal/src/GHC/Internal/System/Environment/ExecutablePath.hsc
- libraries/ghc-internal/tests/stack-annotation/all.T
- + libraries/ghc-internal/tests/stack-annotation/ann_frame005.hs
- + libraries/ghc-internal/tests/stack-annotation/ann_frame005.stdout
- libraries/ghc-platform/src/GHC/Platform/ArchOS.hs
- libraries/haskeline
- + libraries/libffi-clib
- libraries/mtl
- + m4/fp_linker_supports_verbatim.m4
- m4/ghc_select_file_extensions.m4
- m4/prep_target_file.m4
- mk/system-cxx-std-lib-1.0.conf.in
- packages
- rts/RtsFlags.c
- rts/StgMiscClosures.cmm
- rts/configure.ac
- rts/include/rts/ghc_ffi.h
- rts/rts.buildinfo.in
- rts/rts.cabal
- − rts/win32/libHSffi.def
- − rts/win32/libHSghc-internal.def
- − rts/win32/libHSghc-prim.def
- + testsuite/driver/_elffile.py
- testsuite/driver/perf_notes.py
- testsuite/driver/runtests.py
- testsuite/driver/testglobals.py
- testsuite/driver/testlib.py
- testsuite/ghc-config/ghc-config.hs
- testsuite/mk/test.mk
- testsuite/tests/deriving/should_fail/T8984.stderr
- testsuite/tests/deriving/should_fail/deriving-via-fail.stderr
- testsuite/tests/deriving/should_fail/deriving-via-fail4.stderr
- testsuite/tests/deriving/should_fail/deriving-via-fail5.stderr
- + testsuite/tests/dmdanal/should_run/T26748.hs
- + testsuite/tests/dmdanal/should_run/T26748.stdout
- testsuite/tests/dmdanal/should_run/all.T
- − testsuite/tests/driver/T24731.hs
- testsuite/tests/driver/all.T
- + testsuite/tests/driver/fully-static/Hello.hs
- + testsuite/tests/driver/fully-static/Makefile
- + testsuite/tests/driver/fully-static/all.T
- + testsuite/tests/driver/fully-static/fully-static.stdout
- + testsuite/tests/driver/fully-static/test/Test.hs
- + testsuite/tests/driver/fully-static/test/test.pkg
- + testsuite/tests/driver/mostly-static/Hello.hs
- + testsuite/tests/driver/mostly-static/Makefile
- + testsuite/tests/driver/mostly-static/all.T
- + testsuite/tests/driver/mostly-static/mostly-static.stdout
- + testsuite/tests/driver/mostly-static/test/test.c
- + testsuite/tests/driver/mostly-static/test/test.h
- + testsuite/tests/driver/mostly-static/test/test.pkg
- testsuite/tests/ghci.debugger/scripts/T8487.stdout
- testsuite/tests/ghci.debugger/scripts/break011.stdout
- testsuite/tests/ghci.debugger/scripts/break017.stdout
- testsuite/tests/ghci.debugger/scripts/break025.stdout
- 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/perf/should_run/all.T
- + testsuite/tests/pmcheck/should_compile/T24867.hs
- + testsuite/tests/pmcheck/should_compile/T24867.stderr
- testsuite/tests/pmcheck/should_compile/all.T
- testsuite/tests/rts/linker/rdynamic.hs
- testsuite/tests/simplCore/should_compile/T14003.stderr
- testsuite/tests/simplCore/should_compile/T18013.stderr
- testsuite/tests/simplCore/should_compile/T19672.stderr
- testsuite/tests/simplCore/should_compile/T21763.stderr
- testsuite/tests/simplCore/should_compile/T21763a.stderr
- + testsuite/tests/simplCore/should_compile/T26615.hs
- + testsuite/tests/simplCore/should_compile/T26615.stderr
- + testsuite/tests/simplCore/should_compile/T26615a.hs
- + testsuite/tests/simplCore/should_compile/T26682.hs
- + testsuite/tests/simplCore/should_compile/T26682a.hs
- + testsuite/tests/simplCore/should_compile/T26709.hs
- + testsuite/tests/simplCore/should_compile/T26709.stderr
- + testsuite/tests/simplCore/should_compile/T26722.hs
- + testsuite/tests/simplCore/should_compile/T26722.stderr
- testsuite/tests/simplCore/should_compile/T4908.stderr
- testsuite/tests/simplCore/should_compile/all.T
- testsuite/tests/simplCore/should_compile/spec-inline.stderr
- + testsuite/tests/typecheck/should_compile/T26746.hs
- testsuite/tests/typecheck/should_compile/all.T
- testsuite/tests/typecheck/should_fail/T15801.stderr
- testsuite/tests/typecheck/should_fail/T22924b.stderr
- testsuite/tests/typecheck/should_fail/TcCoercibleFail.hs
- testsuite/tests/typecheck/should_fail/TcCoercibleFail.stderr
- testsuite/tests/typecheck/should_fail/all.T
- utils/ghc-pkg/Main.hs
- utils/ghc-toolchain/exe/Main.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Tools/Link.hs
- − utils/iserv/iserv.cabal.in
- − utils/iserv/src/Main.hs
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/7ae17f5d13f42385b462e8e75c6d14…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/7ae17f5d13f42385b462e8e75c6d14…
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