[Git][ghc/ghc][wip/sjakobi/T27653] 3 commits: testsuite: Migrate perf tests off collect_compiler_stats('all')
by Simon Jakobi (＠sjakobi) 13 Aug '26
by Simon Jakobi (＠sjakobi) 13 Aug '26
13 Aug '26
Simon Jakobi pushed to branch wip/sjakobi/T27653 at Glasgow Haskell Compiler / GHC
Commits:
218d6445 by Simon Jakobi at 2026-08-13T11:52:41+02:00
testsuite: Migrate perf tests off collect_compiler_stats('all')
The 'all' metric argument applies a single tolerance to bytes
allocated, max_bytes_used and peak_megabytes_allocated, although their
noise profiles are incompatible (#27653): allocations are nearly
deterministic, residency needs 10-20%, and peak is quantized to 1 MB.
Any single tolerance is too tight for one metric or too slack for
another. This migrates all users of 'all' (and of the 'all' default)
to explicit per-metric collection, ahead of removing 'all' from the
driver.
peak_megabytes_allocated is dropped everywhere: its 1 MB granularity
makes tight relative windows meaningless (#27613), and it is sensitive
to GC timing. In #27489 it drifted by -5.3% while max_bytes_used moved
by less than 0.1%. Where a test guards a memory property,
max_bytes_used covers it at byte granularity.
Where the motivating ticket was about compile-time memory
(T11545, T15304, T26425, LinkableUsage01/02), residency remains
gated via max_bytes_used, now with a residency-appropriate tolerance.
max_bytes_used is dropped where residency was only ever an accident of
'all':
* T15630, T15630a, T20261: the underlying tickets (#15630, #20261)
contain no memory data at all. One is a simplifier-ticks blowup and
the other is stated entirely in allocation numbers, so the 20%
window never had teeth.
* T21839c: #21839's measurements show residency essentially flat
(+0.16%) while allocations moved +7%, so allocations are the
discriminating metric. They are already gated at 1% via
collect_compiler_runtime. The ghc/max gate had previously broken CI
spuriously (9fd11585eb widened it from 1% to 10% for that reason).
Allocation tolerances are tightened to the testsuite's conventional 2%
where 'all' previously left them at 10-20%.
Assisted-by: Claude Fable 5
- - - - -
2e568d97 by Simon Jakobi at 2026-08-13T12:05:11+02:00
testsuite: Remove the 'all' metric argument of collect_stats
'all' gated bytes allocated, max_bytes_used and peak_megabytes_allocated
at a single tolerance, although their noise profiles are incompatible,
making such tests either flaky or toothless (#27653).
Assisted-by: Claude Fable 5
- - - - -
8e164679 by Simon Jakobi at 2026-08-13T12:06:47+02:00
testsuite: Make the deviation argument of collect_stats mandatory
Almost every caller passes an explicit tolerance matched to the
metric's noise profile, and the silent 20% default is far slacker than
'bytes allocated' merits. Only two tests relied on it. They now state
their tolerance explicitly:
large-project gets 10%, in line with other large compile-time tests.
T9848 gets 2%: its metric is byte-for-byte deterministic across CI
jobs and platforms of a given test_env, has drifted only about 2.5%
since 2015, and the fusion failure it guards against would show up as
a roughly +30000% jump.
Assisted-by: Claude Fable 5
- - - - -
7 changed files:
- libraries/base/tests/all.T
- testsuite/driver/README.md
- testsuite/driver/testlib.py
- testsuite/tests/bytecode/TLinkable/all.T
- testsuite/tests/perf/compiler/all.T
- testsuite/tests/perf/compiler/large-project/all.T
- testsuite/tests/perf/space_leaks/all.T
Changes:
=====================================
libraries/base/tests/all.T
=====================================
@@ -243,7 +243,7 @@ test('T8684', expect_broken(8684), compile_and_run, [''])
test('hWaitForInput-accurate-stdin', [js_broken(22349), expect_broken_for(16535, threaded_ways), req_process], compile_and_run, [''])
test('T9826',normal, compile_and_run,[''])
test('T9848',
- [ collect_stats('bytes allocated')
+ [ collect_stats('bytes allocated', 2)
, only_ways(['normal'])
, js_broken(22261)
],
=====================================
testsuite/driver/README.md
=====================================
@@ -35,11 +35,13 @@ differences, and things such as that are not necessary to be considered by the
test writer anymore. This is due to the fact that the test comparison relies
entirely on locally collected metrics on the testing machine.
-As such, it is perfectly sufficient to write `collect_stats('all',20)` in the
-".T" files to measure the 3 potential stats that can be collected for that test
-and automatically test them for regressions, failing if there is more than a 20%
-change in any direction. In fact, even that is not necessary as
-`collect_stats()` defaults to 'all', and 20% deviation allowed.
+A test states which metric to measure and how much deviation to allow, e.g.
+`collect_stats('bytes allocated', 2)` in the ".T" files. Such a test fails if
+the metric changes by more than 2% in either direction. To gate several metrics,
+use one `collect_stats` call per metric, so that each gets a tolerance matched
+to its noise profile: allocations are nearly deterministic and support tight
+windows, while the residency metrics need considerably slacker ones (see
+Note [Measuring residency] in testlib.py).
The function `collect_compiler_stats()` is completely equivalent in every way to
`collect_stats` except that it measures the performance of the compiler itself
=====================================
testsuite/driver/testlib.py
=====================================
@@ -24,7 +24,7 @@ import subprocess
from testglobals import config, ghc_env, default_testopts, brokens, t, \
TestRun, TestResult, TestOptions, PerfMetric
from testutil import strip_quotes, lndir, link_or_copy_file, passed, \
- failBecause, testing_metrics, residency_testing_metrics, \
+ failBecause, residency_testing_metrics, \
stable_perf_counters, \
PassFail, badResult, str_warn, str_removeprefix
from term_color import Color, colored
@@ -816,28 +816,20 @@ def _collect_generic_stat(name : TestName, opts, metric_infos):
# -----
-# Defaults to "test everything, and only break on extreme cases"
-#
-# The inputs to this function are slightly interesting:
-# metric can be either:
-# - 'all', in which case all 3 possible metrics are collected and compared.
-# - The specific metric one wants to use in the test.
-# - A set of the metrics one wants to use in the test.
-#
-# Deviation defaults to 20% because the goal is correctness over performance.
-# The testsuite should avoid breaking when there is not an actual error.
-# Instead, the testsuite should notify of regressions in a non-breaking manner.
+# metric is either a single metric name or a set of metric names. Use one
+# call per metric so each gets a tolerance matched to its noise profile.
+# See Note [Measuring residency] for the residency metrics.
#
# collect_compiler_stats is used when the metrics collected are about the compiler.
# collect_stats is used in the majority case when the metrics to be collected
# are about the performance of the runtime code generated by the compiler.
-def collect_compiler_stats(metric='all',deviation=20):
+def collect_compiler_stats(metric, deviation):
def f(name, opts, m=metric, d=deviation):
no_lint(name, opts)
return _collect_stats(name, opts, m, d, None, True)
return f
-def collect_stats(metric='all', deviation=20, static_stats_file=None):
+def collect_stats(metric, deviation, static_stats_file=None):
return lambda name, opts, m=metric, d=deviation, s=static_stats_file: _collect_stats(name, opts, m, d, s)
def statsFile(comp_test: bool, name: str) -> str:
@@ -864,12 +856,9 @@ def _collect_stats(name: TestName, opts, metrics, deviation: Optional[int],
# This is a bit weird, though.
return
- # Normalize metrics to a list of strings.
+ # Normalize metrics to a set of strings.
if isinstance(metrics, str):
- if metrics == 'all':
- metrics = testing_metrics()
- else:
- metrics = { metrics }
+ metrics = { metrics }
opts.is_stats_test = True
if is_compiler_stats_test:
=====================================
testsuite/tests/bytecode/TLinkable/all.T
=====================================
@@ -3,7 +3,8 @@
# after they have been loaded into the `LoaderState`.
# However, this property is currently not validated automatically.
test('LinkableUsage01'
- , [ collect_compiler_stats('all', 2)
+ , [ collect_compiler_stats('bytes allocated', 2)
+ , collect_compiler_stats('max_bytes_used', 5)
, extra_files(['genLinkables.sh', 'BCOTemplate.hs'])
, pre_cmd('$MAKE -s --no-print-directory LinkableUsage01_Prep')
, req_bco
@@ -18,7 +19,8 @@ test('LinkableUsage01'
# Performance test for bytecode `Linkable`s.
test('LinkableUsage02'
- , [ collect_compiler_stats('all', 2)
+ , [ collect_compiler_stats('bytes allocated', 2)
+ , collect_compiler_stats('max_bytes_used', 5)
, extra_files(['genLinkables.sh', 'BCOTemplate.hs'])
, pre_cmd('$MAKE -s --no-print-directory LinkableUsage02_Prep')
, req_bco
=====================================
testsuite/tests/perf/compiler/all.T
=====================================
@@ -640,13 +640,16 @@ test ('T15164',
],
compile,
['-v0 -O'])
+# T15630/T15630a guard against exponential simplifier blowup when inlining
+# join points (#15630). T15630a is a monomorphic variant that has blown up
+# even when T15630 was fine; see the comment in T15630.hs.
test('T15630',
- [collect_compiler_stats()
+ [collect_compiler_stats('bytes allocated', 2)
],
compile,
['-O2'])
test('T15630a',
- [collect_compiler_stats()
+ [collect_compiler_stats('bytes allocated', 2)
],
compile,
['-O2'])
@@ -770,12 +773,19 @@ test ('T9198',
compile,
[''])
+# Guards against quadratic demand-analysis cost on wide recursive data
+# types, which manifested as a compile-time memory blowup (#11545).
test('T11545',
- [ collect_compiler_stats('all', 15) ],
+ [ collect_compiler_stats('bytes allocated', 2)
+ , collect_compiler_residency(15) ],
compile, ['-O'])
+# Guards against the compile-time memory blowup of #15304, caused by
+# over-keen inlining and demand-analysis memory usage on a module with
+# many wide strict constructors.
test('T15304',
- [ collect_compiler_stats('all', 10) ],
+ [ collect_compiler_stats('bytes allocated', 2)
+ , collect_compiler_residency(10) ],
compile, ['-O'])
test ('T20049',
[ collect_compiler_stats('bytes allocated',2) ],
@@ -797,8 +807,10 @@ test('T16875', # Testing one hole-fit with a lot in scope for #16875
collect_compiler_runtime(4),
compile, ['-fdefer-type-errors -fno-max-valid-hole-fits -package ghc'])
+# Guards against renamer/typechecker allocation regressions on very large
+# generated modules (#20261, a Happy-generated parser).
test ('T20261',
- [collect_compiler_stats('all')],
+ [collect_compiler_stats('bytes allocated', 2)],
compile,
[''])
@@ -807,8 +819,7 @@ test ('T20261',
# does not sensibly handle one test acting as both
# a compile-time and a run-time performance test
test('T21839c',
- [ collect_compiler_stats('all', 10),
- collect_compiler_runtime(1),
+ [ collect_compiler_runtime(1),
only_ways(['normal'])],
compile,
['-O'])
@@ -874,8 +885,12 @@ test('interpreter_steplocal',
ghci_script,
['interpreter_steplocal.script'])
+# Guards against the compile-time memory blowup of #26425; primarily
+# stresses OccAnal and unfolding performance on a long chain of nested
+# join points and cases.
test ('T26425',
- [ collect_compiler_stats('all',20) ],
+ [ collect_compiler_stats('bytes allocated', 2)
+ , collect_compiler_residency(20) ],
compile,
['-O'])
=====================================
testsuite/tests/perf/compiler/large-project/all.T
=====================================
@@ -7,7 +7,7 @@ def large_project_makedepend(num):
return test(
f'large-project-makedepend-{num}',
[
- collect_compiler_stats('bytes allocated'),
+ collect_compiler_stats('bytes allocated', 10),
pre_cmd(f'./large-project.sh {num}'),
extra_files(['large-project.sh']),
ignore_stderr,
=====================================
testsuite/tests/perf/space_leaks/all.T
=====================================
@@ -1,9 +1,6 @@
setTestOpts(js_skip)
test('space_leak_001',
- # This could potentially be replaced with
- # collect_stats('all',5) to test all 3 with
- # 5% possible deviation.
[ collect_stats('bytes allocated',5),
collect_runtime_residency(15),
omit_ways(['profasm','profthreaded','threaded1','threaded2',
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/b28f7e4865c3345380cf8880a3cf9c…
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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 5 commits: Allow rewriting in RuntimeReps for newtype ConPats
by Marge Bot (＠marge-bot) 13 Aug '26
by Marge Bot (＠marge-bot) 13 Aug '26
13 Aug '26
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
e230a6b6 by sheaf at 2026-08-13T05:24:25-04:00
Allow rewriting in RuntimeReps for newtype ConPats
This commit implements PHASE 2 of the FixedRuntimeRep plan described in
Note [The Concrete mechanism] in GHC.Tc.Utils.Concrete for newtype
constructor patterns.
In short, GHC now accepts programs of the form
f (MkN x) = ...
in which the argument 'x' of the newtype constructor pattern 'MkN x'
has a representation that is not syntactically concrete, e.g. it can be
'Id IntRep' reducing to 'IntRep'. See T20363{,b,c} for examples.
There are two main parts to the implementation:
1. Typechecking, in GHC.Tc.Gen.Pat.tcDataConPat.
See Note [Typechecking newtype constructor patterns] in GHC.Tc.Gen.Pat.
2. Desugaring. We restructure the code for desugaring pattern matches
by allowing the scrutinised match variable to be casted. This allows
us to accumulate coercions and avoids creating binders at intermediate
types tha don't have a fixed RuntimeRep.
See the revamped Note [Match Ids] in GHC.HsToCore.Monad.
Fixes #20363
-------------------------
Metric Increase:
InstanceMatching
-------------------------
- - - - -
5c7e44af by Wolfgang Jeltsch at 2026-08-13T05:24:26-04:00
Improve the documentation of `--show-iface`
This change in particular gets rid of the claim that `--show-iface`
writes *the* contents of the interface file in question. It doesn’t do
that; it only writes those parts that are likely of interest to a human
reader.
- - - - -
be94ffa2 by Sylvain Henry at 2026-08-13T05:24:34-04:00
RTS: fix LDV profiler's slop skipping (#27585)
processHeapForDead was the one heap scanner not updated for the slop
marker encoding introduced in #19048. It still assumed slop is zeroed:
while (p < bd->free && !*p) p++; // skip slop
so it stopped at the (StgWord)(-1) sentinel and passed it to
processHeapClosureForDead. IS_FORWARDING_PTR(-1) holds, hence a garbage
size was read out of LDVW and the scan ran off the block, tripping
ASSERT(p == bd->free) on a debug RTS and silently corrupting the census
otherwise.
The loop was hand-copied in four places, so factor it out into skipSlop
in ClosureMacros.h and use it in ProfHeap.c, Sanity.c, Printer.c and
LdvProfile.c.
Co-Authored-By: Claude Opus 5 (1M context) <noreply(a)anthropic.com>
- - - - -
9eb9bc74 by Zubin Duggal at 2026-08-13T05:24:35-04:00
hadrian: Fix links to remaining doc sites to not use the package hash for haddock links
In 07267f79d91169f474cacc8bcd38d76a6e97887d we changed hadrian to not include the package hash in the haddock
directory. This patch takes care of a few remaining links that were missed in that patch
Fixes #27671
- - - - -
6e10933a by Simon Jakobi at 2026-08-13T05:24:35-04:00
Testsuite: widen InstanceMatching acceptance window to 5% (#27673)
...in order to unblock CI.
Assisted-by: Claude Fable 5
- - - - -
49 changed files:
- + changelog.d/T20363
- changelog.d/fix-heap-census-large-arrays-19048
- compiler/GHC/Hs/Pat.hs
- compiler/GHC/HsToCore/Match.hs
- compiler/GHC/HsToCore/Match.hs-boot
- compiler/GHC/HsToCore/Match/Constructor.hs
- compiler/GHC/HsToCore/Match/Literal.hs
- compiler/GHC/HsToCore/Monad.hs
- compiler/GHC/HsToCore/Utils.hs
- compiler/GHC/Tc/Gen/Pat.hs
- compiler/GHC/Tc/Gen/Sig.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Utils/Concrete.hs
- compiler/GHC/Types/Id/Make.hs
- docs/index.html.in
- docs/users_guide/ghc_config.py.in
- docs/users_guide/separate_compilation.rst
- docs/users_guide/using.rst
- hadrian/src/Rules/Generate.hs
- rts/LdvProfile.c
- rts/PrimOps.cmm
- rts/Printer.c
- rts/ProfHeap.c
- rts/include/rts/storage/ClosureMacros.h
- rts/sm/Sanity.c
- rts/sm/Storage.c
- testsuite/tests/corelint/T21115b.stderr
- testsuite/tests/dmdanal/should_compile/T23398.stderr
- testsuite/tests/numeric/should_compile/T23907.stderr
- testsuite/tests/perf/compiler/all.T
- testsuite/tests/rep-poly/RepPolyRecordPattern.hs
- testsuite/tests/rep-poly/RepPolyRecordPattern.stderr
- testsuite/tests/rep-poly/RepPolyRecordUpdate.stderr
- testsuite/tests/rep-poly/T20113.stderr
- − testsuite/tests/rep-poly/T20363.stderr
- − testsuite/tests/rep-poly/T20363_show_co.hs
- − testsuite/tests/rep-poly/T20363_show_co.stderr
- − testsuite/tests/rep-poly/T20363b.stderr
- + testsuite/tests/rep-poly/T20363c.hs
- testsuite/tests/rep-poly/all.T
- + testsuite/tests/rts/T27585.hs
- + testsuite/tests/rts/T27585.stdout
- testsuite/tests/rts/all.T
- testsuite/tests/simplCore/should_compile/T24229a.stderr
- testsuite/tests/simplCore/should_compile/T24229b.stderr
- testsuite/tests/simplCore/should_compile/T3717.stderr
- testsuite/tests/simplCore/should_compile/T3772.stdout
- testsuite/tests/simplCore/should_compile/T4081.stderr
- testsuite/tests/simplCore/should_compile/T4908.stderr
The diff was not included because it is too large.
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[Git][ghc/ghc][wip/spj-reinstallable-base2] 2 commits: Major patch to re-engineer known-key names
by sheaf (＠sheaf) 13 Aug '26
by sheaf (＠sheaf) 13 Aug '26
13 Aug '26
sheaf pushed to branch wip/spj-reinstallable-base2 at Glasgow Haskell Compiler / GHC
Commits:
c61ad9a3 by Simon Peyton Jones at 2026-08-13T10:51:18+02:00
Major patch to re-engineer known-key names
This big patch implements the New Plan for known-key names,
described in #27013.
Read the big Note [Overview of known-key names] in GHC.Types.Name
Some things had to be reworked slightly to accomodate the new known-keys
design. A significant one was the generation of auxiliary KindRep
bindings, which was greatly simplified. Note [Grand plan for Typeable]
was updated accordingly. Another example: GHC.Internal.CString was
merged into GHC.Internal.Types.
Co-authored-by: Rodrigo Mesquita <rodrigo.m.mesquita(a)gmail.com>
The couple hundreds of hours spent here by Rodrigo were sponsored by Well-Typed
Metrics: compile_time/bytes allocated
-------------------------------------
Baseline
Test Metric value New value Change
------------------------------------------------------------------------------------------
MultiComponentModules100(normal) ghc/alloc 24,312,779,672 24,990,470,432 +2.8% BAD
MultiComponentModulesRecomp(normal) ghc/alloc 601,924,960 621,884,888 +3.3% BAD
MultiComponentModulesRecomp100(normal) ghc/alloc 11,884,065,432 12,531,373,704 +5.4% BAD
MultiLayerModules(normal) ghc/alloc 3,861,537,072 3,706,919,512 -4.0% GOOD
T13701(normal) ghc/alloc 3,517,246,392 3,237,179,616 -8.0% GOOD
T13820(normal) ghc/alloc 28,961,056 29,663,208 +2.4% BAD
T14697(normal) ghc/alloc 472,044,184 443,550,048 -6.0% GOOD
T18140(normal) ghc/alloc 47,905,664 49,115,808 +2.5% BAD
T4801(normal) ghc/alloc 269,339,096 263,432,040 -2.2% GOOD
T783(normal) ghc/alloc 341,112,672 333,339,952 -2.3% GOOD
hard_hole_fits(normal) ghc/alloc 222,164,728 213,433,808 -3.9% GOOD
mhu-perf(normal) ghc/alloc 49,011,440 46,706,280 -4.7% GOOD
geo. mean +0.1%
minimum -8.0%
maximum +5.4%
All performance regressions were investigated in depth. The surviving
ones:
- MultiComponentModules100, MultiComponentModulesRecomp100,
MultiComponentModulesRecomp regresses because existing bugs that make
an additional implicit edge do too much redundant work: #27053 and #27461
- T13820, T18140, T10547, T13035 regress because we load an additional
interface and associated Names for GHC.Essentials.
-------------------------
Metric Decrease:
MultiLayerModules
T13379
T13701
T14697
T26989
T4801
T783
T9961
hard_hole_fits
mhu-perf
size_hello_artifact
size_hello_obj
size_hello_unicode
Metric Increase:
LinkableUsage01
LinkableUsage02
MultiComponentModules100
MultiComponentModulesRecomp
MultiComponentModulesRecomp100
T10547
T13035
T13820
T18140
T18698a
T18698b
T20049
-------------------------
Bumps submodule binary
Closes #27013
- - - - -
e67f4c90 by sheaf at 2026-08-13T10:51:48+02:00
Allow GHC.Essentials to be hidden
This commit overhauls several aspects of the known entity handling,
in order to allow GHC.Essentials to be hidden without a proliferation
of special cases in the compiler.
The main contribution is to introduce the 'UnresolvedImport' datatype
which cleans up a lot of ad-hoc handling relating to 'ModSummary',
fixing #27603. This allows us to reduce duplication, e.g. by having
Backpack reuse 'mkUnresolvedImports' instead of replicating the
"add implicit imports" logic. It also makes it easier to avoid
undesirable edge cases (such as making sure that the Template Haskell
'reifyModule' function does not leak the implicit GHC.Essentials import).
In particular, the infamous 'findImportedModuleWithIsBoot' is now simply
'resolveImport', taking a single 'UnresolvedImport' and resolving it
to a 'FindResult' (usually a 'Module').
Other changes:
- Cache the result of looking up GHC.Essentials (in TcM and DsM
environments) to avoid redundant work.
This reduces allocations on LinkableUsage01 and hard_hole_fits.
- Properly look up known entities for StaticPointers like we do for
other known entities everywhere else. This allows e.g. modules in
ghc-internal to use -XStaticPointers.
- When using multiple home units, we are now careful to handle the
situation in which we may have multiple GHC.Essentials modules
around. See the new tests under 'driver/multipleHomeUnits'.
- - - - -
793 changed files:
- + changelog.d/refactor-known-names
- compiler/GHC.hs
- + compiler/GHC/Builtin.hs
- + compiler/GHC/Builtin/KnownKeys.hs
- + compiler/GHC/Builtin/KnownOccs.hs
- + compiler/GHC/Builtin/Modules.hs
- − compiler/GHC/Builtin/Names.hs
- − compiler/GHC/Builtin/Names/TH.hs
- compiler/GHC/Builtin/PrimOps.hs
- compiler/GHC/Builtin/PrimOps/Casts.hs
- compiler/GHC/Builtin/PrimOps/Ids.hs
- + compiler/GHC/Builtin/TH.hs
- compiler/GHC/Builtin/Uniques.hs
- compiler/GHC/Builtin/Uniques.hs-boot
- − compiler/GHC/Builtin/Utils.hs
- + compiler/GHC/Builtin/WiredIn/Ids.hs
- compiler/GHC/Builtin/Types/Prim.hs → compiler/GHC/Builtin/WiredIn/Prim.hs
- compiler/GHC/Builtin/Types/Literals.hs → compiler/GHC/Builtin/WiredIn/TypeLits.hs
- compiler/GHC/Builtin/Types.hs → compiler/GHC/Builtin/WiredIn/Types.hs
- compiler/GHC/Builtin/Types.hs-boot → compiler/GHC/Builtin/WiredIn/Types.hs-boot
- compiler/GHC/ByteCode/Asm.hs
- compiler/GHC/Core.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/DataCon.hs
- compiler/GHC/Core/FVs.hs
- compiler/GHC/Core/FamInstEnv.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/CprAnal.hs
- compiler/GHC/Core/Opt/DmdAnal.hs
- compiler/GHC/Core/Opt/LiberateCase.hs
- compiler/GHC/Core/Opt/OccurAnal.hs
- compiler/GHC/Core/Opt/SetLevels.hs
- compiler/GHC/Core/Opt/Simplify/Env.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Opt/SpecConstr.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Core/Opt/WorkWrap/Utils.hs
- compiler/GHC/Core/Ppr.hs
- compiler/GHC/Core/Predicate.hs
- compiler/GHC/Core/Rules.hs
- compiler/GHC/Core/SimpleOpt.hs
- compiler/GHC/Core/Subst.hs
- compiler/GHC/Core/TyCo/FVs.hs
- compiler/GHC/Core/TyCo/Rep.hs
- compiler/GHC/Core/TyCon.hs
- compiler/GHC/Core/Type.hs
- compiler/GHC/Core/Unfold.hs
- compiler/GHC/Core/Unify.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToIface.hs
- compiler/GHC/CoreToStg.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Driver/Backpack.hs
- compiler/GHC/Driver/Config/Tidy.hs
- compiler/GHC/Driver/Downsweep.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Env.hs
- compiler/GHC/Driver/Env/KnotVars.hs
- compiler/GHC/Driver/Env/Types.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Main/Hsc.hs
- compiler/GHC/Driver/Main/Passes.hs
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/MakeFile.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Driver/Plugins.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/ImpExp.hs
- compiler/GHC/Hs/Lit.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.hs
- compiler/GHC/HsToCore/Arrows.hs
- compiler/GHC/HsToCore/Binds.hs
- compiler/GHC/HsToCore/Expr.hs
- compiler/GHC/HsToCore/Foreign/C.hs
- compiler/GHC/HsToCore/Foreign/Call.hs
- compiler/GHC/HsToCore/Foreign/JavaScript.hs
- compiler/GHC/HsToCore/Foreign/Utils.hs
- compiler/GHC/HsToCore/Foreign/Wasm.hs
- compiler/GHC/HsToCore/ListComp.hs
- compiler/GHC/HsToCore/Match.hs
- compiler/GHC/HsToCore/Match/Literal.hs
- compiler/GHC/HsToCore/Monad.hs
- compiler/GHC/HsToCore/Pmc/Check.hs
- compiler/GHC/HsToCore/Pmc/Desugar.hs
- compiler/GHC/HsToCore/Pmc/Ppr.hs
- compiler/GHC/HsToCore/Pmc/Solver.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/HsToCore/Types.hs
- compiler/GHC/HsToCore/Usage.hs
- compiler/GHC/HsToCore/Utils.hs
- compiler/GHC/Iface/Binary.hs
- compiler/GHC/Iface/Env.hs
- − compiler/GHC/Iface/Env.hs-boot
- compiler/GHC/Iface/Errors/Ppr.hs
- compiler/GHC/Iface/Errors/Types.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Iface/Load.hs
- compiler/GHC/Iface/Make.hs
- compiler/GHC/Iface/Recomp.hs
- compiler/GHC/Iface/Syntax.hs
- compiler/GHC/Iface/Tidy.hs
- compiler/GHC/Iface/Type.hs
- compiler/GHC/IfaceToCore.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Annotation.hs
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Header.hs
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Plugins.hs
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Rename/Expr.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/Unbound.hs
- compiler/GHC/Rename/Utils.hs
- compiler/GHC/Runtime/Context.hs
- compiler/GHC/Runtime/Debugger.hs
- compiler/GHC/Runtime/Eval.hs
- compiler/GHC/Runtime/Heap/Inspect.hs
- compiler/GHC/Runtime/Interpreter.hs
- compiler/GHC/Runtime/Loader.hs
- compiler/GHC/Stg/BcPrep.hs
- compiler/GHC/Stg/Unarise.hs
- compiler/GHC/StgToByteCode.hs
- compiler/GHC/StgToCmm/Bind.hs
- compiler/GHC/StgToCmm/DataCon.hs
- compiler/GHC/StgToCmm/Env.hs
- compiler/GHC/StgToCmm/Foreign.hs
- compiler/GHC/StgToCmm/Lit.hs
- compiler/GHC/StgToCmm/Ticky.hs
- compiler/GHC/StgToJS/Apply.hs
- compiler/GHC/StgToJS/Arg.hs
- compiler/GHC/StgToJS/Expr.hs
- compiler/GHC/StgToJS/FFI.hs
- compiler/GHC/StgToJS/Linker/Utils.hs
- compiler/GHC/StgToJS/Utils.hs
- compiler/GHC/Tc/Deriv.hs
- compiler/GHC/Tc/Deriv/Functor.hs
- compiler/GHC/Tc/Deriv/Generate.hs
- compiler/GHC/Tc/Deriv/Generics.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/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/Export.hs
- compiler/GHC/Tc/Gen/Expr.hs
- 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/Pat.hs
- compiler/GHC/Tc/Gen/Sig.hs
- compiler/GHC/Tc/Gen/Splice.hs
- compiler/GHC/Tc/Instance/Class.hs
- compiler/GHC/Tc/Instance/FunDeps.hs
- compiler/GHC/Tc/Instance/Typeable.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Tc/Plugin.hs
- compiler/GHC/Tc/Solver.hs
- compiler/GHC/Tc/Solver/Default.hs
- compiler/GHC/Tc/Solver/Dict.hs
- compiler/GHC/Tc/Solver/FunDeps.hs
- compiler/GHC/Tc/Solver/InertSet.hs
- compiler/GHC/Tc/Solver/Monad.hs
- compiler/GHC/Tc/Solver/Rewrite.hs
- compiler/GHC/Tc/TyCl.hs
- compiler/GHC/Tc/TyCl/Build.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/Constraint.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Types/LclEnv.hs
- compiler/GHC/Tc/Types/Origin.hs
- compiler/GHC/Tc/Utils/Backpack.hs
- compiler/GHC/Tc/Utils/Concrete.hs
- compiler/GHC/Tc/Utils/Env.hs
- compiler/GHC/Tc/Utils/Instantiate.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/Tc/Utils/TcType.hs
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/Tc/Validity.hs
- compiler/GHC/Tc/Zonk/Type.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/DefaultEnv.hs
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/Hint.hs
- compiler/GHC/Types/Hint/Ppr.hs
- compiler/GHC/Types/Id/Make.hs
- compiler/GHC/Types/Literal.hs
- compiler/GHC/Types/Name.hs
- compiler/GHC/Types/Name/Cache.hs
- compiler/GHC/Types/Name/Ppr.hs
- compiler/GHC/Types/Name/Reader.hs
- compiler/GHC/Types/RepType.hs
- compiler/GHC/Types/TyThing.hs
- compiler/GHC/Types/Unique.hs
- compiler/GHC/Types/Unique/FM.hs
- + compiler/GHC/Types/UnresolvedImport.hs
- compiler/GHC/Types/Var.hs
- compiler/GHC/Unit.hs
- compiler/GHC/Unit/External.hs
- compiler/GHC/Unit/External/Index.hs
- compiler/GHC/Unit/External/ModuleOrigin.hs
- compiler/GHC/Unit/External/Providers.hs
- compiler/GHC/Unit/Finder.hs
- compiler/GHC/Unit/Finder/Types.hs
- compiler/GHC/Unit/Module/Deps.hs
- compiler/GHC/Unit/Module/ModSummary.hs
- compiler/GHC/Unit/State.hs
- compiler/GHC/Unit/Types.hs
- compiler/GHC/Utils/Binary.hs
- − compiler/GHC/Utils/Binary/Typeable.hs
- compiler/Language/Haskell/Syntax/Expr.hs
- compiler/ghc.cabal.in
- docs/users_guide/separate_compilation.rst
- ghc/GHCi/UI.hs
- ghc/GHCi/UI/Monad.hs
- ghc/Main.hs
- libraries/base/base.cabal.in
- libraries/base/src/Control/Applicative.hs
- libraries/base/src/Control/Concurrent.hs
- libraries/base/src/Control/Concurrent/Chan.hs
- libraries/base/src/Control/Concurrent/QSem.hs
- libraries/base/src/Control/Concurrent/QSemN.hs
- libraries/base/src/Data/Array/Byte.hs
- libraries/base/src/Data/Bifoldable.hs
- libraries/base/src/Data/Bifoldable1.hs
- libraries/base/src/Data/Bifunctor.hs
- libraries/base/src/Data/Bitraversable.hs
- libraries/base/src/Data/Bool.hs
- libraries/base/src/Data/Complex.hs
- libraries/base/src/Data/Data.hs
- libraries/base/src/Data/Enum.hs
- libraries/base/src/Data/Fixed.hs
- libraries/base/src/Data/Foldable1.hs
- libraries/base/src/Data/Functor/Classes.hs
- libraries/base/src/Data/Functor/Compose.hs
- libraries/base/src/Data/Functor/Contravariant.hs
- libraries/base/src/Data/Functor/Product.hs
- libraries/base/src/Data/Functor/Sum.hs
- libraries/base/src/Data/List.hs
- libraries/base/src/Data/List/NonEmpty.hs
- libraries/base/src/Data/List/NubOrdSet.hs
- libraries/base/src/Data/Semigroup.hs
- libraries/base/src/Data/Version.hs
- libraries/base/src/GHC/Base.hs
- libraries/base/src/GHC/ByteOrder.hs
- + libraries/base/src/GHC/Essentials.hs
- libraries/base/src/GHC/Exts.hs
- libraries/base/src/GHC/Fingerprint.hs
- libraries/base/src/GHC/RTS/Flags.hs
- libraries/base/src/GHC/ResponseFile.hs
- libraries/base/src/GHC/Stats.hs
- libraries/base/src/GHC/Weak/Finalize.hs
- libraries/base/src/Numeric.hs
- libraries/base/src/Prelude.hs
- libraries/base/src/System/CPUTime/Posix/ClockGetTime.hsc
- libraries/base/src/System/CPUTime/Posix/RUsage.hsc
- libraries/base/src/System/CPUTime/Posix/Times.hsc
- libraries/base/src/System/CPUTime/Unsupported.hs
- libraries/base/src/System/Console/GetOpt.hs
- libraries/base/src/System/Exit.hs
- libraries/base/src/System/IO.hs
- libraries/base/src/System/IO/OS.hs
- libraries/base/src/System/IO/Unsafe.hs
- libraries/base/src/System/Info.hs
- libraries/base/src/System/Timeout.hs
- libraries/base/src/Text/Printf.hs
- libraries/base/src/Text/Read.hs
- libraries/base/src/Text/Show/Functions.hs
- libraries/binary
- libraries/ghc-experimental/src/Data/Sum/Experimental.hs
- libraries/ghc-experimental/src/Data/Tuple/Experimental.hs
- libraries/ghc-experimental/src/GHC/Profiling/Eras.hs
- libraries/ghc-experimental/src/Prelude/Experimental.hs
- libraries/ghc-internal/codepages/MakeTable.hs
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/include/RtsIfaceSymbols.h
- libraries/ghc-internal/src/GHC/Internal/AllocationLimitHandler.hs
- libraries/ghc-internal/src/GHC/Internal/Arr.hs
- libraries/ghc-internal/src/GHC/Internal/ArrayArray.hs
- libraries/ghc-internal/src/GHC/Internal/Base.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/GMP.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/Native.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/BigNat.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/BigNat.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Bignum/Integer.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Integer.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Bignum/Natural.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Natural.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Bignum/Primitives.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/WordArray.hs
- libraries/ghc-internal/src/GHC/Internal/Bits.hs
- libraries/ghc-internal/src/GHC/Internal/ByteOrder.hs
- libraries/ghc-internal/src/GHC/Internal/CString.hs
- libraries/ghc-internal/src/GHC/Internal/Char.hs
- libraries/ghc-internal/src/GHC/Internal/Classes.hs
- libraries/ghc-internal/src/GHC/Internal/Classes/IP.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/POSIX/Const.hsc
- libraries/ghc-internal/src/GHC/Internal/Conc/Signal.hs
- libraries/ghc-internal/src/GHC/Internal/Conc/Sync.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/Category.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
- libraries/ghc-internal/src/GHC/Internal/Control/Monad.hs
- 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.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/ST/Imp.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/ST/Lazy.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/ST/Lazy/Imp.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/Zip.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Bits.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Coerce.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/Foldable.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Function.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor/Const.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor/Identity.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor/Utils.hs
- libraries/ghc-internal/src/GHC/Internal/Data/IORef.hs
- libraries/ghc-internal/src/GHC/Internal/Data/List.hs
- libraries/ghc-internal/src/GHC/Internal/Data/List/NonEmpty.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Maybe.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Monoid.hs
- libraries/ghc-internal/src/GHC/Internal/Data/NonEmpty.hs
- libraries/ghc-internal/src/GHC/Internal/Data/OldList.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Ord.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Proxy.hs
- libraries/ghc-internal/src/GHC/Internal/Data/STRef.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Semigroup/Internal.hs
- libraries/ghc-internal/src/GHC/Internal/Data/String.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Traversable.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Tuple.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Type/Bool.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Type/Coercion.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Type/Equality.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Type/Ord.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Typeable.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Typeable/Internal.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Unique.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Version.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Void.hs
- libraries/ghc-internal/src/GHC/Internal/Debug/Trace.hs
- libraries/ghc-internal/src/GHC/Internal/Desugar.hs
- libraries/ghc-internal/src/GHC/Internal/Encoding/UTF8.hs
- libraries/ghc-internal/src/GHC/Internal/Enum.hs
- libraries/ghc-internal/src/GHC/Internal/Enum.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Environment.hs
- libraries/ghc-internal/src/GHC/Internal/Err.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Arr.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Array.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Control.hs
- libraries/ghc-internal/src/GHC/Internal/Event/EPoll.hsc
- libraries/ghc-internal/src/GHC/Internal/Event/IntTable.hs
- libraries/ghc-internal/src/GHC/Internal/Event/IntVar.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Internal.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Internal/Types.hs
- libraries/ghc-internal/src/GHC/Internal/Event/KQueue.hsc
- libraries/ghc-internal/src/GHC/Internal/Event/Manager.hs
- libraries/ghc-internal/src/GHC/Internal/Event/PSQ.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Poll.hsc
- libraries/ghc-internal/src/GHC/Internal/Event/Thread.hs
- libraries/ghc-internal/src/GHC/Internal/Event/TimeOut.hs
- libraries/ghc-internal/src/GHC/Internal/Event/TimerManager.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Unique.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Windows.hsc
- libraries/ghc-internal/src/GHC/Internal/Event/Windows/Clock.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Windows/ConsoleEvent.hsc
- libraries/ghc-internal/src/GHC/Internal/Event/Windows/FFI.hsc
- libraries/ghc-internal/src/GHC/Internal/Event/Windows/ManagedThreadPool.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Windows/Thread.hs
- libraries/ghc-internal/src/GHC/Internal/Exception.hs
- libraries/ghc-internal/src/GHC/Internal/Exception/Backtrace.hs
- libraries/ghc-internal/src/GHC/Internal/Exception/Backtrace.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Exception/Context.hs
- libraries/ghc-internal/src/GHC/Internal/Exception/Context.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Exception/Type.hs
- libraries/ghc-internal/src/GHC/Internal/Exception/Type.hs-boot
- libraries/ghc-internal/src/GHC/Internal/ExecutionStack.hs
- libraries/ghc-internal/src/GHC/Internal/ExecutionStack/Internal.hsc
- libraries/ghc-internal/src/GHC/Internal/Exts.hs
- libraries/ghc-internal/src/GHC/Internal/Fingerprint.hs
- libraries/ghc-internal/src/GHC/Internal/Fingerprint/Type.hs
- libraries/ghc-internal/src/GHC/Internal/Float.hs
- libraries/ghc-internal/src/GHC/Internal/Float/ConversionUtils.hs
- libraries/ghc-internal/src/GHC/Internal/Float/RealFracMethods.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/C/ConstPtr.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/C/Error.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/C/String.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/C/String/Encoding.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/C/Types.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/ForeignPtr/Imp.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/Marshal/Alloc.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/Marshal/Array.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/Marshal/Error.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/Marshal/Pool.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/Marshal/Utils.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/Ptr.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/Storable.hs
- libraries/ghc-internal/src/GHC/Internal/ForeignPtr.hs
- libraries/ghc-internal/src/GHC/Internal/ForeignSrcLang.hs
- libraries/ghc-internal/src/GHC/Internal/Functor/ZipList.hs
- libraries/ghc-internal/src/GHC/Internal/GHCi.hs
- libraries/ghc-internal/src/GHC/Internal/GHCi/Helpers.hs
- libraries/ghc-internal/src/GHC/Internal/Generics.hs
- libraries/ghc-internal/src/GHC/Internal/Heap/Closures.hs
- libraries/ghc-internal/src/GHC/Internal/Heap/Constants.hsc
- libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc
- libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable/Types.hsc
- libraries/ghc-internal/src/GHC/Internal/Heap/InfoTableProf.hsc
- libraries/ghc-internal/src/GHC/Internal/Heap/ProfInfo/Types.hs
- libraries/ghc-internal/src/GHC/Internal/IO.hs
- libraries/ghc-internal/src/GHC/Internal/IO.hs-boot
- libraries/ghc-internal/src/GHC/Internal/IO/Buffer.hs
- libraries/ghc-internal/src/GHC/Internal/IO/BufferedIO.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Device.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/CodePage.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/CodePage/API.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/CodePage/Table.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/Failure.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/Iconv.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/Latin1.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/Types.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/UTF16.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/UTF32.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/UTF8.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Exception.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Exception.hs-boot
- libraries/ghc-internal/src/GHC/Internal/IO/FD.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/FD.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Internals.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Lock.hs
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[Git][ghc/ghc][wip/sjakobi/T27459] Enumerate RoughMap unifiers non-deterministically
by Simon Jakobi (＠sjakobi) 13 Aug '26
by Simon Jakobi (＠sjakobi) 13 Aug '26
13 Aug '26
Simon Jakobi pushed to branch wip/sjakobi/T27459 at Glasgow Haskell Compiler / GHC
Commits:
449e126a by Simon Jakobi at 2026-08-13T10:05:41+02:00
Enumerate RoughMap unifiers non-deterministically
The wildcard case of lookupRM' enumerated potential unifiers with a
deterministic fold, which must inspect every entry of rm_known before
producing the first element. This defeats the laziness that
Note [Matches vs Unifiers] relies on: hot consumers such as matchInstEnv
only test whether the unifier list is empty, yet paid for deterministic
iteration over the whole map (#27459).
Enumerate the unifiers with a new lazy nonDetFoldUDFM instead, so the
emptiness test can stop at the first unifier. Matches are still
enumerated deterministically. Unifier order is now restored at the
error-rendering sites: class-instance overlap errors already sort with
fuzzyClsInstCmp, and reportConflictInstErr now picks the reported
conflict deterministically. See Note [Matches vs Unifiers].
-------------------------
Metric Decrease:
InstanceMatching
InstanceMatching1
Assisted-by: Claude Fable 5
- - - - -
4 changed files:
- compiler/GHC/Core/RoughMap.hs
- compiler/GHC/Tc/Instance/Family.hs
- compiler/GHC/Types/Name/Env.hs
- compiler/GHC/Types/Unique/DFM.hs
Changes:
=====================================
compiler/GHC/Core/RoughMap.hs
=====================================
@@ -168,6 +168,16 @@ each candidate. We only need the full list of unifiers when displaying error mes
Therefore the list is computed lazily so much work can be avoided constructing the
list in the first place.
+For the same reason the unifiers are enumerated in non-deterministic order (see
+the RML_WildCard case of lookupRM'): a deterministic fold would have to inspect
+every entry of rm_known before it could produce the first unifier, defeating
+that laziness (#27459; see Note [Cost of deterministic iteration] in
+GHC.Types.Unique.DFM). The order is observable only where error messages are
+rendered, so those sites must sort the unifiers they display; see
+fuzzyClsInstCmp in GHC.Core.InstEnv and reportConflictInstErr in
+GHC.Tc.Instance.Family. The matches, by contrast, are still enumerated
+deterministically.
+
Note [Simple Matching Semantics]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppose `rm` is a RoughMap representing a set of (key,vals) pairs,
@@ -420,15 +430,18 @@ lookupRM' (RML_NoKnownTc : tcs) rm =
lookupRM' (RML_WildCard : tcs) rm =
-- pprTrace "RM wild" (ppr tcs $$ ppr (eltsDNameEnv (rm_known rm))) $
- let (m, u) = foldDNameEnv add_one (emptyBag, []) (rm_known rm)
+ let m = foldDNameEnv (\rm' acc -> fst (lookupRM' tcs rm') `unionBags` acc)
+ emptyBag (rm_known rm)
+ -- The unifiers are enumerated non-deterministically: hot consumers
+ -- only test whether the list is empty, and the lazy fold lets that
+ -- test stop at the first unifier instead of paying for deterministic
+ -- iteration over the whole map (#27459).
+ -- See Note [Matches vs Unifiers].
+ u = nonDetFoldDNameEnv (\rm' acc -> snd (lookupRM' tcs rm') ++ acc)
+ [] (rm_known rm)
(u_m, u_u) = lookupRM' tcs (rm_wild rm)
in ( rm_empty rm `unionBags` u_m `unionBags` m
, bagToList (rm_empty rm) ++ u_u ++ u )
- where
- add_one :: RoughMap a -> (Bag a, [a]) -> (Bag a, [a])
- add_one rm ~(m2, u2) = (m1 `unionBags` m2, u1 ++ u2)
- where
- (m1,u1) = lookupRM' tcs rm
unionRM :: RoughMap a -> RoughMap a -> RoughMap a
unionRM RMEmpty a = a
=====================================
compiler/GHC/Tc/Instance/Family.hs
=====================================
@@ -939,11 +939,18 @@ buildInjectivityError mkErr fam_tc branches
reportConflictInstErr :: FamInst -> [FamInst] -> TcRn ()
reportConflictInstErr _ []
= return () -- No conflicts
-reportConflictInstErr fam_inst (conf_inst : _) =
+reportConflictInstErr fam_inst (conf_inst1 : conf_insts) =
+ -- The conflicts are enumerated in non-deterministic order (see
+ -- Note [Matches vs Unifiers] in GHC.Core.RoughMap), so pick the one to
+ -- report deterministically.
-- The sortBy just arranges that instances are displayed in order
-- of source location, which reduced wobbling in error messages,
-- and is better for users
- let sorted = NE.sortBy (SrcLoc.leftmost_smallest `on` getSpan) (fam_inst NE.:| [conf_inst])
+ let conf_inst = minimumBy cmp_inst (conf_inst1 :| conf_insts)
+ cmp_inst f1 f2 = case (SrcLoc.leftmost_smallest `on` getSpan) f1 f2 of
+ EQ -> (stableNameCmp `on` (getName . famInstAxiom)) f1 f2
+ o -> o
+ sorted = NE.sortBy (SrcLoc.leftmost_smallest `on` getSpan) (fam_inst NE.:| [conf_inst])
fi1 = NE.head sorted
span = coAxBranchSpan (coAxiomSingleBranch (famInstAxiom fi1))
getSpan = getSrcSpan . famInstAxiom
=====================================
compiler/GHC/Types/Name/Env.hs
=====================================
@@ -40,6 +40,7 @@ module GHC.Types.Name.Env (
plusDNameEnv_C,
foldDNameEnv,
nonDetStrictFoldDNameEnv,
+ nonDetFoldDNameEnv,
-- ** Dependency analysis
depAnal
) where
@@ -224,3 +225,7 @@ plusDNameEnv_C = plusUDFM_C
nonDetStrictFoldDNameEnv :: (a -> b -> b) -> b -> DNameEnv a -> b
nonDetStrictFoldDNameEnv = nonDetStrictFoldUDFM
+-- | Lazy nondeterministic fold; can stream and short-circuit.
+nonDetFoldDNameEnv :: (a -> b -> b) -> b -> DNameEnv a -> b
+nonDetFoldDNameEnv = nonDetFoldUDFM
+
=====================================
compiler/GHC/Types/Unique/DFM.hs
=====================================
@@ -66,6 +66,7 @@ module GHC.Types.Unique.DFM (
udfmToList,
udfmToUfm,
nonDetStrictFoldUDFM,
+ nonDetFoldUDFM,
unsafeCastUDFMKey,
alwaysUnsafeUfmToUdfm,
) where
@@ -378,6 +379,15 @@ nonDetStrictFoldUDFM k z (UDFM m _i) = foldl' k' z m
where
k' acc (TaggedVal v _) = k v acc
+-- | Performs a nondeterministic lazy right fold over the UniqDFM.
+-- It's O(n), and lazy in the accumulator, so unlike 'foldUDFM' it can
+-- stream and short-circuit; see Note [Cost of deterministic iteration].
+-- If you use this please provide a justification why it doesn't introduce
+-- nondeterminism.
+nonDetFoldUDFM :: (elt -> a -> a) -> a -> UniqDFM key elt -> a
+{-# INLINE nonDetFoldUDFM #-}
+nonDetFoldUDFM k z (UDFM m _i) = M.foldr (k . taggedFst) z m
+
{- Note [Cost of deterministic iteration]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Deterministic iteration -- foldUDFM, eltsUDFM, udfmToList, and everything
@@ -392,7 +402,8 @@ whether the result was non-empty.
So: to test for emptiness, use isNullUDFM rather than null on eltsUDFM;
for order-oblivious queries, prefer short-circuiting anyUDFM/allUDFM; and
-if you don't need the deterministic order at all, use nonDetStrictFoldUDFM.
+if you don't need the deterministic order at all, use nonDetStrictFoldUDFM
+(or nonDetFoldUDFM when the fold should stream or short-circuit).
-}
-- | Deterministic, in order of insertion.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/449e126ac32f447b7b916cdf446ca9c…
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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/449e126ac32f447b7b916cdf446ca9c…
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Zubin pushed to branch wip/27626 at Glasgow Haskell Compiler / GHC
Commits:
876bc4ee by Zubin Duggal at 2026-08-13T13:24:15+05:30
DmdAnal: Fix maxDmdType
We need to eta expand the smaller DmdType using defaultArgDmd, like in lubDmdType.
Introduce zipDmdType as a common combinator to implement both maxDmdType and lubDmdType
uniformly.
fixes #27626
- - - - -
6 changed files:
- + changelog.d/27626
- compiler/GHC/Types/Demand.hs
- + testsuite/tests/dmdanal/should_run/M2.hs
- + testsuite/tests/dmdanal/should_run/T27626.hs
- + testsuite/tests/dmdanal/should_run/T27626.stdout
- testsuite/tests/dmdanal/should_run/all.T
Changes:
=====================================
changelog.d/27626
=====================================
@@ -0,0 +1,5 @@
+section: compiler
+synopsis: Fix a bug where an argument used only by a function's stable unfolding
+ could still be marked absent, resulting in a runtime crash.
+mrs: !16503
+issues: #27626
=====================================
compiler/GHC/Types/Demand.hs
=====================================
@@ -1849,12 +1849,14 @@ botDmdEnv = mkEmptyDmdEnv botDiv
exnDmdEnv :: DmdEnv
exnDmdEnv = mkEmptyDmdEnv exnDiv
+combineDmdEnv :: (Demand -> Demand -> Demand) -> DmdEnv -> DmdEnv -> DmdEnv
+combineDmdEnv f (DE fv1 d1) (DE fv2 d2)
+ -- See Note [Demand env Equality]
+ = DE (plusVarEnv_CD f fv1 (defaultFvDmd d1) fv2 (defaultFvDmd d2))
+ (lubDivergence d1 d2)
+
lubDmdEnv :: DmdEnv -> DmdEnv -> DmdEnv
-lubDmdEnv (DE fv1 d1) (DE fv2 d2) = DE lub_fv lub_div
- where
- -- See Note [Demand env Equality]
- lub_fv = plusVarEnv_CD lubDmd fv1 (defaultFvDmd d1) fv2 (defaultFvDmd d2)
- lub_div = lubDivergence d1 d2
+lubDmdEnv = combineDmdEnv lubDmd
addVarDmdEnv :: DmdEnv -> Id -> Demand -> DmdEnv
addVarDmdEnv env@(DE fvs div) id dmd
@@ -1908,36 +1910,31 @@ instance Eq DmdType where
= ds1 == ds2 -- cheap checks first
&& env1 == env2
+-- | The smaller 'DmdType' is eta expanded using its 'defaultArgDmd'.
+-- See Note [Default demand on free variables and arguments].
+zipDmdType :: (Demand -> Demand -> Demand) -> DmdType -> DmdType -> DmdType
+zipDmdType f (DmdType fv1 ds1) (DmdType fv2 ds2)
+ = DmdType (combineDmdEnv f fv1 fv2) (go ds1 ds2)
+ where
+ def1, def2 :: Demand -- Default argument demands for eta expansion
+ def1 = defaultArgDmd (de_div fv1)
+ def2 = defaultArgDmd (de_div fv2)
+
+ -- If `ds1` is shorter than `ds2`, extend `ds1` with the appropriate
+ -- default demand `def1`; and similarly if `ds2` is shorter
+ go (d1:ds1') (d2:ds2') = f d1 d2 : go ds1' ds2'
+ go [] ds2' = map (def1 `f`) ds2'
+ go ds1' [] = map (`f` def2) ds1'
+
-- | Compute the least upper bound of two 'DmdType's elicited /by the same
-- incoming demand/!
lubDmdType :: DmdType -> DmdType -> DmdType
-lubDmdType d1 d2 = DmdType lub_fv lub_ds
- where
- n = max (dmdTypeDepth d1) (dmdTypeDepth d2)
- (DmdType fv1 ds1) = etaExpandDmdType n d1
- (DmdType fv2 ds2) = etaExpandDmdType n d2
- lub_ds = zipWithEqual lubDmd ds1 ds2
- lub_fv = lubDmdEnv fv1 fv2
+lubDmdType = zipDmdType lubDmd
-- | Combine two 'DmdType's for stable unfolding analysis.
-- See Note [Combining demands for stable unfoldings].
maxDmdType :: DmdType -> DmdType -> DmdType
-maxDmdType (DmdType fv1 ds1) (DmdType fv2 ds2)
- = DmdType combined_fv combined_ds
- where
- combined_fv = maxDmdEnv fv1 fv2
- combined_ds = go ds1 ds2
- -- If lists have different lengths, keep remaining ds1 (from RHS)
- go rhs [] = rhs
- go [] _ = []
- go (r:rhs) (u:unfs) = maxDmd r u : go rhs unfs
-
--- | See Note [Combining demands for stable unfoldings].
-maxDmdEnv :: DmdEnv -> DmdEnv -> DmdEnv
-maxDmdEnv (DE fv1 d1) (DE fv2 d2) = DE combined_fv combined_div
- where
- combined_fv = plusVarEnv_CD maxDmd fv1 (defaultFvDmd d1) fv2 (defaultFvDmd d2)
- combined_div = lubDivergence d1 d2
+maxDmdType = zipDmdType maxDmd
discardArgDmds :: DmdType -> DmdEnv
discardArgDmds (DmdType fv _) = fv
=====================================
testsuite/tests/dmdanal/should_run/M2.hs
=====================================
@@ -0,0 +1,28 @@
+module M2 where
+
+-- f's stable unfolding template is the PAP `mk g`, which is not
+-- eta-expanded, so its DmdType has depth 0. The big lambda keeps the
+-- template large enough that f does not certainlyWillInline, so it is
+-- worker/wrappered.
+{-# INLINABLE [1] f #-}
+f :: Int -> Int -> Float
+f = mk (\y -> succ . succ . succ . succ . succ . succ . succ . succ . succ $ y)
+
+-- Arity 1: the `let` does real work, so mk is not eta-expanded past it.
+-- The returned function really forces x.
+{-# NOINLINE mk #-}
+mk :: (Int -> Int) -> Int -> Int -> Float
+mk t = let s = t 1 in \dummy x -> x `seq` fromIntegral (t (dummy + s))
+
+{-# INLINE mkFast #-}
+mkFast :: (Int -> Int) -> Int -> Int -> Float
+mkFast t = \dummy x -> fromIntegral (t dummy)
+
+-- Active only before phase 1: rewrites f's RHS early, but is dead by
+-- the time f's stable unfolding (activation [1]) is inlined at call
+-- sites.
+{-# RULES "mk" [~1] forall t. mk t = mkFast t #-}
+
+{-# NOINLINE g #-}
+g :: Int -> Int
+g x = x + 1
=====================================
testsuite/tests/dmdanal/should_run/T27626.hs
=====================================
@@ -0,0 +1,6 @@
+-- The raised threshold persuades GHC to inline the worker's stable
+-- unfolding in this small program; a larger program does that naturally.
+{-# OPTIONS_GHC -funfolding-use-threshold=400 #-}
+module Main where
+import M2 ( f )
+main = print (f 19 12)
=====================================
testsuite/tests/dmdanal/should_run/T27626.stdout
=====================================
@@ -0,0 +1 @@
+38.0
=====================================
testsuite/tests/dmdanal/should_run/all.T
=====================================
@@ -36,3 +36,4 @@ test('T23208', exit_code(1), multimod_compile_and_run, ['T23208_Lib', 'T23208'])
test('T25439', normal, compile_and_run, [''])
test('T26748', normal, compile_and_run, [''])
test('T26416', [extra_files(['M1.hs'])], multimod_compile_and_run, ['T26416','M1.hs'])
+test('T27626', [extra_files(['M2.hs'])], multimod_compile_and_run, ['T27626','M2.hs'])
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/876bc4ee7d8d46e425f0748f9f64193…
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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 6 commits: Major patch to re-engineer known-key names
by Marge Bot (＠marge-bot) 13 Aug '26
by Marge Bot (＠marge-bot) 13 Aug '26
13 Aug '26
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
4898a5ba by Simon Peyton Jones at 2026-08-12T21:20:54-04:00
Major patch to re-engineer known-key names
This big patch implements the New Plan for known-key names,
described in #27013.
Read the big Note [Overview of known-key names] in GHC.Types.Name
Some things had to be reworked slightly to accomodate the new known-keys
design. A significant one was the generation of auxiliary KindRep
bindings, which was greatly simplified. Note [Grand plan for Typeable]
was updated accordingly. Another example: GHC.Internal.CString was
merged into GHC.Internal.Types.
Co-authored-by: Rodrigo Mesquita <rodrigo.m.mesquita(a)gmail.com>
The couple hundreds of hours spent here by Rodrigo were sponsored by Well-Typed
Metrics: compile_time/bytes allocated
-------------------------------------
Baseline
Test Metric value New value Change
------------------------------------------------------------------------------------------
MultiComponentModules100(normal) ghc/alloc 24,312,779,672 24,990,470,432 +2.8% BAD
MultiComponentModulesRecomp(normal) ghc/alloc 601,924,960 621,884,888 +3.3% BAD
MultiComponentModulesRecomp100(normal) ghc/alloc 11,884,065,432 12,531,373,704 +5.4% BAD
MultiLayerModules(normal) ghc/alloc 3,861,537,072 3,706,919,512 -4.0% GOOD
T13701(normal) ghc/alloc 3,517,246,392 3,237,179,616 -8.0% GOOD
T13820(normal) ghc/alloc 28,961,056 29,663,208 +2.4% BAD
T14697(normal) ghc/alloc 472,044,184 443,550,048 -6.0% GOOD
T18140(normal) ghc/alloc 47,905,664 49,115,808 +2.5% BAD
T4801(normal) ghc/alloc 269,339,096 263,432,040 -2.2% GOOD
T783(normal) ghc/alloc 341,112,672 333,339,952 -2.3% GOOD
hard_hole_fits(normal) ghc/alloc 222,164,728 213,433,808 -3.9% GOOD
mhu-perf(normal) ghc/alloc 49,011,440 46,706,280 -4.7% GOOD
geo. mean +0.1%
minimum -8.0%
maximum +5.4%
All performance regressions were investigated in depth. The surviving
ones:
- MultiComponentModules100, MultiComponentModulesRecomp100,
MultiComponentModulesRecomp regresses because existing bugs that make
an additional implicit edge do too much redundant work: #27053 and #27461
- T13820, T18140, T10547, T13035 regress because we load an additional
interface and associated Names for GHC.Essentials.
-------------------------
Metric Decrease:
MultiLayerModules
T13379
T13701
T14697
T26989
T4801
T783
hard_hole_fits
mhu-perf
size_hello_obj
Metric Increase:
LinkableUsage01
LinkableUsage02
MultiComponentModules100
MultiComponentModulesRecomp
MultiComponentModulesRecomp100
T10547
T13035
T13820
T18140
T18698a
T18698b
T20049
-------------------------
Bumps submodule binary
Closes #27013
- - - - -
0a1ad8a1 by sheaf at 2026-08-12T21:20:54-04:00
Allow GHC.Essentials to be hidden
This commit overhauls several aspects of the known entity handling,
in order to allow GHC.Essentials to be hidden without a proliferation
of special cases in the compiler.
The main contribution is to introduce the 'UnresolvedImport' datatype
which cleans up a lot of ad-hoc handling relating to 'ModSummary',
fixing #27603. This allows us to reduce duplication, e.g. by having
Backpack reuse 'mkUnresolvedImports' instead of replicating the
"add implicit imports" logic. It also makes it easier to avoid
undesirable edge cases (such as making sure that the Template Haskell
'reifyModule' function does not leak the implicit GHC.Essentials import).
In particular, the infamous 'findImportedModuleWithIsBoot' is now simply
'resolveImport', taking a single 'UnresolvedImport' and resolving it
to a 'FindResult' (usually a 'Module').
Other changes:
- Cache the result of looking up GHC.Essentials (in TcM and DsM
environments) to avoid redundant work.
This reduces allocations on LinkableUsage01 and hard_hole_fits.
- Properly look up known entities for StaticPointers like we do for
other known entities everywhere else. This allows e.g. modules in
ghc-internal to use -XStaticPointers.
- When using multiple home units, we are now careful to handle the
situation in which we may have multiple GHC.Essentials modules
around. See the new tests under 'driver/multipleHomeUnits'.
- - - - -
247e701b by Wolfgang Jeltsch at 2026-08-12T21:21:06-04:00
Improve the documentation of `--show-iface`
This change in particular gets rid of the claim that `--show-iface`
writes *the* contents of the interface file in question. It doesn’t do
that; it only writes those parts that are likely of interest to a human
reader.
- - - - -
8b328542 by Sylvain Henry at 2026-08-12T21:21:14-04:00
RTS: fix LDV profiler's slop skipping (#27585)
processHeapForDead was the one heap scanner not updated for the slop
marker encoding introduced in #19048. It still assumed slop is zeroed:
while (p < bd->free && !*p) p++; // skip slop
so it stopped at the (StgWord)(-1) sentinel and passed it to
processHeapClosureForDead. IS_FORWARDING_PTR(-1) holds, hence a garbage
size was read out of LDVW and the scan ran off the block, tripping
ASSERT(p == bd->free) on a debug RTS and silently corrupting the census
otherwise.
The loop was hand-copied in four places, so factor it out into skipSlop
in ClosureMacros.h and use it in ProfHeap.c, Sanity.c, Printer.c and
LdvProfile.c.
Co-Authored-By: Claude Opus 5 (1M context) <noreply(a)anthropic.com>
- - - - -
14a1c46d by Alan Zimmerman at 2026-08-12T21:21:16-04:00
EPA: Remove al_trailing from AnnList
It was not being used
- - - - -
bce8165b by Simon Jakobi at 2026-08-12T21:21:18-04:00
Testsuite: widen InstanceMatching acceptance window to 5% (#27673)
...in order to unblock CI.
Assisted-by: Claude Fable 5
- - - - -
817 changed files:
- changelog.d/fix-heap-census-large-arrays-19048
- + changelog.d/refactor-known-names
- compiler/GHC.hs
- + compiler/GHC/Builtin.hs
- + compiler/GHC/Builtin/KnownKeys.hs
- + compiler/GHC/Builtin/KnownOccs.hs
- + compiler/GHC/Builtin/Modules.hs
- − compiler/GHC/Builtin/Names.hs
- − compiler/GHC/Builtin/Names/TH.hs
- compiler/GHC/Builtin/PrimOps.hs
- compiler/GHC/Builtin/PrimOps/Casts.hs
- compiler/GHC/Builtin/PrimOps/Ids.hs
- + compiler/GHC/Builtin/TH.hs
- compiler/GHC/Builtin/Uniques.hs
- compiler/GHC/Builtin/Uniques.hs-boot
- − compiler/GHC/Builtin/Utils.hs
- + compiler/GHC/Builtin/WiredIn/Ids.hs
- compiler/GHC/Builtin/Types/Prim.hs → compiler/GHC/Builtin/WiredIn/Prim.hs
- compiler/GHC/Builtin/Types/Literals.hs → compiler/GHC/Builtin/WiredIn/TypeLits.hs
- compiler/GHC/Builtin/Types.hs → compiler/GHC/Builtin/WiredIn/Types.hs
- compiler/GHC/Builtin/Types.hs-boot → compiler/GHC/Builtin/WiredIn/Types.hs-boot
- compiler/GHC/ByteCode/Asm.hs
- compiler/GHC/Core.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/DataCon.hs
- compiler/GHC/Core/FVs.hs
- compiler/GHC/Core/FamInstEnv.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/CprAnal.hs
- compiler/GHC/Core/Opt/DmdAnal.hs
- compiler/GHC/Core/Opt/LiberateCase.hs
- compiler/GHC/Core/Opt/OccurAnal.hs
- compiler/GHC/Core/Opt/SetLevels.hs
- compiler/GHC/Core/Opt/Simplify/Env.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Opt/SpecConstr.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Core/Opt/WorkWrap/Utils.hs
- compiler/GHC/Core/Ppr.hs
- compiler/GHC/Core/Predicate.hs
- compiler/GHC/Core/Rules.hs
- compiler/GHC/Core/SimpleOpt.hs
- compiler/GHC/Core/Subst.hs
- compiler/GHC/Core/TyCo/FVs.hs
- compiler/GHC/Core/TyCo/Rep.hs
- compiler/GHC/Core/TyCon.hs
- compiler/GHC/Core/Type.hs
- compiler/GHC/Core/Unfold.hs
- compiler/GHC/Core/Unify.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToIface.hs
- compiler/GHC/CoreToStg.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Driver/Backpack.hs
- compiler/GHC/Driver/Config/Tidy.hs
- compiler/GHC/Driver/Downsweep.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Env.hs
- compiler/GHC/Driver/Env/KnotVars.hs
- compiler/GHC/Driver/Env/Types.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Main/Hsc.hs
- compiler/GHC/Driver/Main/Passes.hs
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/MakeFile.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Driver/Plugins.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/ImpExp.hs
- compiler/GHC/Hs/Lit.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.hs
- compiler/GHC/HsToCore/Arrows.hs
- compiler/GHC/HsToCore/Binds.hs
- compiler/GHC/HsToCore/Expr.hs
- compiler/GHC/HsToCore/Foreign/C.hs
- compiler/GHC/HsToCore/Foreign/Call.hs
- compiler/GHC/HsToCore/Foreign/JavaScript.hs
- compiler/GHC/HsToCore/Foreign/Utils.hs
- compiler/GHC/HsToCore/Foreign/Wasm.hs
- compiler/GHC/HsToCore/ListComp.hs
- compiler/GHC/HsToCore/Match.hs
- compiler/GHC/HsToCore/Match/Literal.hs
- compiler/GHC/HsToCore/Monad.hs
- compiler/GHC/HsToCore/Pmc/Check.hs
- compiler/GHC/HsToCore/Pmc/Desugar.hs
- compiler/GHC/HsToCore/Pmc/Ppr.hs
- compiler/GHC/HsToCore/Pmc/Solver.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/HsToCore/Types.hs
- compiler/GHC/HsToCore/Usage.hs
- compiler/GHC/HsToCore/Utils.hs
- compiler/GHC/Iface/Binary.hs
- compiler/GHC/Iface/Env.hs
- − compiler/GHC/Iface/Env.hs-boot
- compiler/GHC/Iface/Errors/Ppr.hs
- compiler/GHC/Iface/Errors/Types.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Iface/Load.hs
- compiler/GHC/Iface/Make.hs
- compiler/GHC/Iface/Recomp.hs
- compiler/GHC/Iface/Syntax.hs
- compiler/GHC/Iface/Tidy.hs
- compiler/GHC/Iface/Type.hs
- compiler/GHC/IfaceToCore.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Annotation.hs
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Header.hs
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Plugins.hs
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Rename/Expr.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/Unbound.hs
- compiler/GHC/Rename/Utils.hs
- compiler/GHC/Runtime/Context.hs
- compiler/GHC/Runtime/Debugger.hs
- compiler/GHC/Runtime/Eval.hs
- compiler/GHC/Runtime/Heap/Inspect.hs
- compiler/GHC/Runtime/Interpreter.hs
- compiler/GHC/Runtime/Loader.hs
- compiler/GHC/Stg/BcPrep.hs
- compiler/GHC/Stg/Unarise.hs
- compiler/GHC/StgToByteCode.hs
- compiler/GHC/StgToCmm/Bind.hs
- compiler/GHC/StgToCmm/DataCon.hs
- compiler/GHC/StgToCmm/Env.hs
- compiler/GHC/StgToCmm/Foreign.hs
- compiler/GHC/StgToCmm/Lit.hs
- compiler/GHC/StgToCmm/Ticky.hs
- compiler/GHC/StgToJS/Apply.hs
- compiler/GHC/StgToJS/Arg.hs
- compiler/GHC/StgToJS/Expr.hs
- compiler/GHC/StgToJS/FFI.hs
- compiler/GHC/StgToJS/Linker/Utils.hs
- compiler/GHC/StgToJS/Utils.hs
- compiler/GHC/Tc/Deriv.hs
- compiler/GHC/Tc/Deriv/Functor.hs
- compiler/GHC/Tc/Deriv/Generate.hs
- compiler/GHC/Tc/Deriv/Generics.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/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/Export.hs
- compiler/GHC/Tc/Gen/Expr.hs
- 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/Pat.hs
- compiler/GHC/Tc/Gen/Sig.hs
- compiler/GHC/Tc/Gen/Splice.hs
- compiler/GHC/Tc/Instance/Class.hs
- compiler/GHC/Tc/Instance/FunDeps.hs
- compiler/GHC/Tc/Instance/Typeable.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Tc/Plugin.hs
- compiler/GHC/Tc/Solver.hs
- compiler/GHC/Tc/Solver/Default.hs
- compiler/GHC/Tc/Solver/Dict.hs
- compiler/GHC/Tc/Solver/FunDeps.hs
- compiler/GHC/Tc/Solver/InertSet.hs
- compiler/GHC/Tc/Solver/Monad.hs
- compiler/GHC/Tc/Solver/Rewrite.hs
- compiler/GHC/Tc/TyCl.hs
- compiler/GHC/Tc/TyCl/Build.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/Constraint.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Types/LclEnv.hs
- compiler/GHC/Tc/Types/Origin.hs
- compiler/GHC/Tc/Utils/Backpack.hs
- compiler/GHC/Tc/Utils/Concrete.hs
- compiler/GHC/Tc/Utils/Env.hs
- compiler/GHC/Tc/Utils/Instantiate.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/Tc/Utils/TcType.hs
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/Tc/Validity.hs
- compiler/GHC/Tc/Zonk/Type.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/DefaultEnv.hs
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/Hint.hs
- compiler/GHC/Types/Hint/Ppr.hs
- compiler/GHC/Types/Id/Make.hs
- compiler/GHC/Types/Literal.hs
- compiler/GHC/Types/Name.hs
- compiler/GHC/Types/Name/Cache.hs
- compiler/GHC/Types/Name/Ppr.hs
- compiler/GHC/Types/Name/Reader.hs
- compiler/GHC/Types/RepType.hs
- compiler/GHC/Types/TyThing.hs
- compiler/GHC/Types/Unique.hs
- compiler/GHC/Types/Unique/FM.hs
- + compiler/GHC/Types/UnresolvedImport.hs
- compiler/GHC/Types/Var.hs
- compiler/GHC/Unit.hs
- compiler/GHC/Unit/External.hs
- compiler/GHC/Unit/External/Index.hs
- compiler/GHC/Unit/External/ModuleOrigin.hs
- compiler/GHC/Unit/External/Providers.hs
- compiler/GHC/Unit/Finder.hs
- compiler/GHC/Unit/Finder/Types.hs
- compiler/GHC/Unit/Module/Deps.hs
- compiler/GHC/Unit/Module/ModSummary.hs
- compiler/GHC/Unit/State.hs
- compiler/GHC/Unit/Types.hs
- compiler/GHC/Utils/Binary.hs
- − compiler/GHC/Utils/Binary/Typeable.hs
- compiler/Language/Haskell/Syntax/Expr.hs
- compiler/ghc.cabal.in
- docs/users_guide/separate_compilation.rst
- docs/users_guide/using.rst
- ghc/GHCi/UI.hs
- ghc/GHCi/UI/Monad.hs
- ghc/Main.hs
- libraries/base/base.cabal.in
- libraries/base/src/Control/Applicative.hs
- libraries/base/src/Control/Concurrent.hs
- libraries/base/src/Control/Concurrent/Chan.hs
- libraries/base/src/Control/Concurrent/QSem.hs
- libraries/base/src/Control/Concurrent/QSemN.hs
- libraries/base/src/Data/Array/Byte.hs
- libraries/base/src/Data/Bifoldable.hs
- libraries/base/src/Data/Bifoldable1.hs
- libraries/base/src/Data/Bifunctor.hs
- libraries/base/src/Data/Bitraversable.hs
- libraries/base/src/Data/Bool.hs
- libraries/base/src/Data/Complex.hs
- libraries/base/src/Data/Data.hs
- libraries/base/src/Data/Enum.hs
- libraries/base/src/Data/Fixed.hs
- libraries/base/src/Data/Foldable1.hs
- libraries/base/src/Data/Functor/Classes.hs
- libraries/base/src/Data/Functor/Compose.hs
- libraries/base/src/Data/Functor/Contravariant.hs
- libraries/base/src/Data/Functor/Product.hs
- libraries/base/src/Data/Functor/Sum.hs
- libraries/base/src/Data/List.hs
- libraries/base/src/Data/List/NonEmpty.hs
- libraries/base/src/Data/List/NubOrdSet.hs
- libraries/base/src/Data/Semigroup.hs
- libraries/base/src/Data/Version.hs
- libraries/base/src/GHC/Base.hs
- libraries/base/src/GHC/ByteOrder.hs
- + libraries/base/src/GHC/Essentials.hs
- libraries/base/src/GHC/Exts.hs
- libraries/base/src/GHC/Fingerprint.hs
- libraries/base/src/GHC/RTS/Flags.hs
- libraries/base/src/GHC/ResponseFile.hs
- libraries/base/src/GHC/Stats.hs
- libraries/base/src/GHC/Weak/Finalize.hs
- libraries/base/src/Numeric.hs
- libraries/base/src/Prelude.hs
- libraries/base/src/System/CPUTime/Posix/ClockGetTime.hsc
- libraries/base/src/System/CPUTime/Posix/RUsage.hsc
- libraries/base/src/System/CPUTime/Posix/Times.hsc
- libraries/base/src/System/CPUTime/Unsupported.hs
- libraries/base/src/System/Console/GetOpt.hs
- libraries/base/src/System/Exit.hs
- libraries/base/src/System/IO.hs
- libraries/base/src/System/IO/OS.hs
- libraries/base/src/System/IO/Unsafe.hs
- libraries/base/src/System/Info.hs
- libraries/base/src/System/Timeout.hs
- libraries/base/src/Text/Printf.hs
- libraries/base/src/Text/Read.hs
- libraries/base/src/Text/Show/Functions.hs
- libraries/binary
- libraries/ghc-experimental/src/Data/Sum/Experimental.hs
- libraries/ghc-experimental/src/Data/Tuple/Experimental.hs
- libraries/ghc-experimental/src/GHC/Profiling/Eras.hs
- libraries/ghc-experimental/src/Prelude/Experimental.hs
- libraries/ghc-internal/codepages/MakeTable.hs
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/include/RtsIfaceSymbols.h
- libraries/ghc-internal/src/GHC/Internal/AllocationLimitHandler.hs
- libraries/ghc-internal/src/GHC/Internal/Arr.hs
- libraries/ghc-internal/src/GHC/Internal/ArrayArray.hs
- libraries/ghc-internal/src/GHC/Internal/Base.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/GMP.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/Native.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/BigNat.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/BigNat.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Bignum/Integer.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Integer.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Bignum/Natural.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Natural.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Bignum/Primitives.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/WordArray.hs
- libraries/ghc-internal/src/GHC/Internal/Bits.hs
- libraries/ghc-internal/src/GHC/Internal/ByteOrder.hs
- libraries/ghc-internal/src/GHC/Internal/CString.hs
- libraries/ghc-internal/src/GHC/Internal/Char.hs
- libraries/ghc-internal/src/GHC/Internal/Classes.hs
- libraries/ghc-internal/src/GHC/Internal/Classes/IP.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/POSIX/Const.hsc
- libraries/ghc-internal/src/GHC/Internal/Conc/Signal.hs
- libraries/ghc-internal/src/GHC/Internal/Conc/Sync.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/Category.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
- libraries/ghc-internal/src/GHC/Internal/Control/Monad.hs
- 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.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/ST/Imp.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/ST/Lazy.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/ST/Lazy/Imp.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/Zip.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Bits.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Coerce.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/Foldable.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Function.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor/Const.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor/Identity.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor/Utils.hs
- libraries/ghc-internal/src/GHC/Internal/Data/IORef.hs
- libraries/ghc-internal/src/GHC/Internal/Data/List.hs
- libraries/ghc-internal/src/GHC/Internal/Data/List/NonEmpty.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Maybe.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Monoid.hs
- libraries/ghc-internal/src/GHC/Internal/Data/NonEmpty.hs
- libraries/ghc-internal/src/GHC/Internal/Data/OldList.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Ord.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Proxy.hs
- libraries/ghc-internal/src/GHC/Internal/Data/STRef.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Semigroup/Internal.hs
- libraries/ghc-internal/src/GHC/Internal/Data/String.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Traversable.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Tuple.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Type/Bool.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Type/Coercion.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Type/Equality.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Type/Ord.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Typeable.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Typeable/Internal.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Unique.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Version.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Void.hs
- libraries/ghc-internal/src/GHC/Internal/Debug/Trace.hs
- libraries/ghc-internal/src/GHC/Internal/Desugar.hs
- libraries/ghc-internal/src/GHC/Internal/Encoding/UTF8.hs
- libraries/ghc-internal/src/GHC/Internal/Enum.hs
- libraries/ghc-internal/src/GHC/Internal/Enum.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Environment.hs
- libraries/ghc-internal/src/GHC/Internal/Err.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Arr.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Array.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Control.hs
- libraries/ghc-internal/src/GHC/Internal/Event/EPoll.hsc
- libraries/ghc-internal/src/GHC/Internal/Event/IntTable.hs
- libraries/ghc-internal/src/GHC/Internal/Event/IntVar.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Internal.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Internal/Types.hs
- libraries/ghc-internal/src/GHC/Internal/Event/KQueue.hsc
- libraries/ghc-internal/src/GHC/Internal/Event/Manager.hs
- libraries/ghc-internal/src/GHC/Internal/Event/PSQ.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Poll.hsc
- libraries/ghc-internal/src/GHC/Internal/Event/Thread.hs
- libraries/ghc-internal/src/GHC/Internal/Event/TimeOut.hs
- libraries/ghc-internal/src/GHC/Internal/Event/TimerManager.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Unique.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Windows.hsc
- libraries/ghc-internal/src/GHC/Internal/Event/Windows/Clock.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Windows/ConsoleEvent.hsc
- libraries/ghc-internal/src/GHC/Internal/Event/Windows/FFI.hsc
- libraries/ghc-internal/src/GHC/Internal/Event/Windows/ManagedThreadPool.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Windows/Thread.hs
- libraries/ghc-internal/src/GHC/Internal/Exception.hs
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- libraries/ghc-internal/src/GHC/Internal/Exception/Context.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Exception/Type.hs
- libraries/ghc-internal/src/GHC/Internal/Exception/Type.hs-boot
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- libraries/ghc-internal/src/GHC/Internal/ExecutionStack/Internal.hsc
- libraries/ghc-internal/src/GHC/Internal/Exts.hs
- libraries/ghc-internal/src/GHC/Internal/Fingerprint.hs
- libraries/ghc-internal/src/GHC/Internal/Fingerprint/Type.hs
- libraries/ghc-internal/src/GHC/Internal/Float.hs
- libraries/ghc-internal/src/GHC/Internal/Float/ConversionUtils.hs
- libraries/ghc-internal/src/GHC/Internal/Float/RealFracMethods.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/C/ConstPtr.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/C/Error.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/C/String.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/C/String/Encoding.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/C/Types.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/ForeignPtr/Imp.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/Marshal/Alloc.hs
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- libraries/ghc-internal/src/GHC/Internal/Foreign/Marshal/Error.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/Marshal/Pool.hs
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- libraries/ghc-internal/src/GHC/Internal/Foreign/Ptr.hs
- libraries/ghc-internal/src/GHC/Internal/Foreign/Storable.hs
- libraries/ghc-internal/src/GHC/Internal/ForeignPtr.hs
- libraries/ghc-internal/src/GHC/Internal/ForeignSrcLang.hs
- libraries/ghc-internal/src/GHC/Internal/Functor/ZipList.hs
- libraries/ghc-internal/src/GHC/Internal/GHCi.hs
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- libraries/ghc-internal/src/GHC/Internal/Generics.hs
- libraries/ghc-internal/src/GHC/Internal/Heap/Closures.hs
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- libraries/ghc-internal/src/GHC/Internal/IO/Buffer.hs
- libraries/ghc-internal/src/GHC/Internal/IO/BufferedIO.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Device.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/CodePage.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/CodePage/API.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/CodePage/Table.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/Failure.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/Iconv.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Encoding/Latin1.hs
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- libraries/ghc-internal/src/GHC/Internal/IO/Exception.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Exception.hs-boot
- libraries/ghc-internal/src/GHC/Internal/IO/FD.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/FD.hs
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- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Lock/Common.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Lock/Flock.hsc
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Lock/LinuxOFD.hsc
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Lock/NoOp.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Lock/Windows.hsc
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Text.hs
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- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Types.hs-boot
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- libraries/ghc-internal/src/GHC/Internal/IO/IOMode.hs
- libraries/ghc-internal/src/GHC/Internal/IO/SubSystem.hs
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- libraries/ghc-internal/src/GHC/Internal/IO/Windows/Handle.hsc
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- libraries/ghc-internal/src/GHC/Internal/IORef.hs
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- libraries/ghc-internal/src/GHC/Internal/LanguageExtensions.hs
- libraries/ghc-internal/src/GHC/Internal/Lexeme.hs
- libraries/ghc-internal/src/GHC/Internal/List.hs
- libraries/ghc-internal/src/GHC/Internal/MVar.hs
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- libraries/ghc-internal/src/GHC/Internal/Maybe.hs
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- libraries/ghc-internal/src/GHC/Internal/OverloadedLabels.hs
- libraries/ghc-internal/src/GHC/Internal/Pack.hs
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- libraries/ghc-internal/src/GHC/Internal/Real.hs-boot
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- libraries/ghc-internal/src/GHC/Internal/ST.hs
- libraries/ghc-internal/src/GHC/Internal/STM.hs
- libraries/ghc-internal/src/GHC/Internal/STRef.hs
- libraries/ghc-internal/src/GHC/Internal/Show.hs
- libraries/ghc-internal/src/GHC/Internal/Stable.hs
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- libraries/ghc-internal/src/GHC/Internal/System/Environment/ExecutablePath.hsc
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- libraries/ghc-internal/src/GHC/Internal/System/Mem.hs
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- libraries/ghc-internal/src/GHC/Internal/TH/Lib.hs
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- utils/check-exact/Transform.hs
- utils/check-exact/Utils.hs
- utils/genprimopcode/Main.hs
- utils/haddock/haddock-api/src/Haddock/Convert.hs
- utils/haddock/haddock-api/src/Haddock/GhcUtils.hs
- utils/haddock/haddock-api/src/Haddock/Interface.hs
- utils/haddock/haddock-api/src/Haddock/Interface/AttachInstances.hs
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- utils/haddock/haddock-api/src/Haddock/Interface/Rename.hs
- utils/haddock/haddock-api/src/Haddock/Types.hs
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/a05b15350819ef74027589030bfdab…
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[Git][ghc/ghc][wip/az/exactprint-annotation-rationalisation] 15 commits: EPA: Remove ListBanana / ListParens from AnnListBrackets
by Alan Zimmerman (＠alanz) 12 Aug '26
by Alan Zimmerman (＠alanz) 12 Aug '26
12 Aug '26
Alan Zimmerman pushed to branch wip/az/exactprint-annotation-rationalisation at Glasgow Haskell Compiler / GHC
Commits:
f1dffcfe by Alan Zimmerman at 2026-08-11T20:33:59+01:00
EPA: Remove ListBanana / ListParens from AnnListBrackets
- - - - -
c753f41b by Alan Zimmerman at 2026-08-11T23:09:33+01:00
EPA: Tidy up mkHsDoPv, take AnnList directly
And some extra stuff by accident.
The main goal is to slim down AnnListBrackets to just have braces or
none.
This makes it clear that it serves only for lists which may have layout,
and opens the route to use EpLayout instead of AnnListBrackets
- - - - -
2fed12ec by Alan Zimmerman at 2026-08-12T18:50:45+01:00
EPA: Add specific layout field to AnnList
- - - - -
affb39d4 by Alan Zimmerman at 2026-08-12T21:06:15+01:00
EPA: Use EpaLocation in EpVirtualBraces
reword:
EPA Use vocurly as basis for AnnListLayout
For the existing cases that populate AnnList.
This also shows up AnnList usages that can never capture layout.
- - - - -
23c18c09 by Alan Zimmerman at 2026-08-12T21:29:47+01:00
EPA Use vocurly as basis for AnnListLayout
For the existing cases that populate AnnList.
This also shows up AnnList usages that can never capture layout.
- - - - -
2d86111b by Alan Zimmerman at 2026-08-12T21:29:47+01:00
EPA: AnnList clean up patch for empty where clause
- - - - -
ec87c38f by Alan Zimmerman at 2026-08-12T21:29:47+01:00
EPA: Add TTG fields to FamilyInfo
This commit is a simple add, with unused extension fields.
It lays the groundwork for using them for exact print annotations
- - - - -
6a641163 by Alan Zimmerman at 2026-08-12T21:29:47+01:00
WIP annclassdecl
- - - - -
09e02068 by Alan Zimmerman at 2026-08-12T21:29:47+01:00
EPA: Update AnnClsInstDecl to contain AnnList
It was already separately tracking the '{', '}' and leading ';' values.
This aligns it with layout-introducing parser productions ('vocurly'),
so the layout processing can be handled uniformly
- - - - -
cab6b18a by Alan Zimmerman at 2026-08-12T23:35:32+01:00
EPA: First pass implementation of HsList, for ClassDecls
Just as a straight list replacement to start with, no payload.
This shows the scope and invasiveness of the initial change
- - - - -
3eb49aa3 by Alan Zimmerman at 2026-08-12T23:35:32+01:00
EPA: HsList attempt WIP
- - - - -
9813d8dc by Alan Zimmerman at 2026-08-12T23:35:32+01:00
Enable ppr test for Haddock1. It currently fails
- - - - -
7e3cab56 by Alan Zimmerman at 2026-08-12T23:35:32+01:00
WIP on removing NoEpAnn. Likely abandon
- - - - -
f5f86975 by Alan Zimmerman at 2026-08-12T23:35:32+01:00
EPA: Add an overview doc for exact printing
- - - - -
f74a5e88 by Simon Peyton Jones at 2026-08-12T23:35:32+01:00
Added an intro section
- - - - -
68 changed files:
- ANNLIST-LAYOUT-PLAN.md
- + ExactPrint.md
- compiler/GHC/Driver/Backpack.hs
- compiler/GHC/Driver/Main/Interactive.hs
- compiler/GHC/Hs.hs
- compiler/GHC/Hs/Decls.hs
- compiler/GHC/Hs/DocString.hs
- compiler/GHC/Hs/Dump.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/ImpExp.hs
- compiler/GHC/Hs/Instances.hs
- compiler/GHC/Hs/Pat.hs
- compiler/GHC/Hs/Stats.hs
- compiler/GHC/Hs/Utils.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Annotation.hs
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Parser/PostProcess/Haddock.hs
- compiler/GHC/Rename/Module.hs
- compiler/GHC/Rename/Splice.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Tc/TyCl.hs
- compiler/GHC/Tc/Types/Origin.hs
- compiler/GHC/ThToHs.hs
- compiler/Language/Haskell/Syntax.hs
- compiler/Language/Haskell/Syntax/Basic.hs
- compiler/Language/Haskell/Syntax/Decls.hs
- compiler/Language/Haskell/Syntax/Expr.hs
- compiler/Language/Haskell/Syntax/Extension.hs
- ghc/GHCi/UI.hs
- testsuite/tests/ghc-api/T25121_status.stdout
- testsuite/tests/ghc-api/exactprint/T22919.stderr
- testsuite/tests/ghc-api/exactprint/Test20239.stderr
- testsuite/tests/ghc-api/exactprint/ZeroWidthSemi.stderr
- testsuite/tests/haddock/should_compile_flag_haddock/T17544.stderr
- testsuite/tests/haddock/should_compile_flag_haddock/T17544_kw.stderr
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- testsuite/tests/parser/should_compile/T23315/T23315.stderr
- testsuite/tests/printer/AnnotationNoListTuplePuns.stdout
- testsuite/tests/printer/Makefile
- testsuite/tests/printer/T18791.stderr
- testsuite/tests/printer/Test20297.stdout
- testsuite/tests/printer/Test24533.stdout
- 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/haddock/haddock-api/src/Haddock/Backends/Hoogle.hs
- utils/haddock/haddock-api/src/Haddock/Backends/LaTeX.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Decl.hs
- utils/haddock/haddock-api/src/Haddock/Convert.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Rename.hs
- utils/haddock/haddock-api/src/Haddock/Types.hs
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/8b82cc94a0fb70af6048a3decec255…
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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 6 commits: Major patch to re-engineer known-key names
by Marge Bot (＠marge-bot) 12 Aug '26
by Marge Bot (＠marge-bot) 12 Aug '26
12 Aug '26
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
55945b44 by Simon Peyton Jones at 2026-08-12T18:08:14-04:00
Major patch to re-engineer known-key names
This big patch implements the New Plan for known-key names,
described in #27013.
Read the big Note [Overview of known-key names] in GHC.Types.Name
Some things had to be reworked slightly to accomodate the new known-keys
design. A significant one was the generation of auxiliary KindRep
bindings, which was greatly simplified. Note [Grand plan for Typeable]
was updated accordingly. Another example: GHC.Internal.CString was
merged into GHC.Internal.Types.
Co-authored-by: Rodrigo Mesquita <rodrigo.m.mesquita(a)gmail.com>
The couple hundreds of hours spent here by Rodrigo were sponsored by Well-Typed
Metrics: compile_time/bytes allocated
-------------------------------------
Baseline
Test Metric value New value Change
------------------------------------------------------------------------------------------
MultiComponentModules100(normal) ghc/alloc 24,312,779,672 24,990,470,432 +2.8% BAD
MultiComponentModulesRecomp(normal) ghc/alloc 601,924,960 621,884,888 +3.3% BAD
MultiComponentModulesRecomp100(normal) ghc/alloc 11,884,065,432 12,531,373,704 +5.4% BAD
MultiLayerModules(normal) ghc/alloc 3,861,537,072 3,706,919,512 -4.0% GOOD
T13701(normal) ghc/alloc 3,517,246,392 3,237,179,616 -8.0% GOOD
T13820(normal) ghc/alloc 28,961,056 29,663,208 +2.4% BAD
T14697(normal) ghc/alloc 472,044,184 443,550,048 -6.0% GOOD
T18140(normal) ghc/alloc 47,905,664 49,115,808 +2.5% BAD
T4801(normal) ghc/alloc 269,339,096 263,432,040 -2.2% GOOD
T783(normal) ghc/alloc 341,112,672 333,339,952 -2.3% GOOD
hard_hole_fits(normal) ghc/alloc 222,164,728 213,433,808 -3.9% GOOD
mhu-perf(normal) ghc/alloc 49,011,440 46,706,280 -4.7% GOOD
geo. mean +0.1%
minimum -8.0%
maximum +5.4%
All performance regressions were investigated in depth. The surviving
ones:
- MultiComponentModules100, MultiComponentModulesRecomp100,
MultiComponentModulesRecomp regresses because existing bugs that make
an additional implicit edge do too much redundant work: #27053 and #27461
- T13820, T18140, T10547, T13035 regress because we load an additional
interface and associated Names for GHC.Essentials.
-------------------------
Metric Decrease:
MultiLayerModules
T13379
T13701
T14697
T26989
T4801
T783
hard_hole_fits
mhu-perf
size_hello_obj
Metric Increase:
LinkableUsage01
LinkableUsage02
MultiComponentModules100
MultiComponentModulesRecomp
MultiComponentModulesRecomp100
T10547
T13035
T13820
T18140
T18698a
T18698b
T20049
-------------------------
Bumps submodule binary
Closes #27013
- - - - -
b262e02c by sheaf at 2026-08-12T18:08:15-04:00
Allow GHC.Essentials to be hidden
This commit overhauls several aspects of the known entity handling,
in order to allow GHC.Essentials to be hidden without a proliferation
of special cases in the compiler.
The main contribution is to introduce the 'UnresolvedImport' datatype
which cleans up a lot of ad-hoc handling relating to 'ModSummary',
fixing #27603. This allows us to reduce duplication, e.g. by having
Backpack reuse 'mkUnresolvedImports' instead of replicating the
"add implicit imports" logic. It also makes it easier to avoid
undesirable edge cases (such as making sure that the Template Haskell
'reifyModule' function does not leak the implicit GHC.Essentials import).
In particular, the infamous 'findImportedModuleWithIsBoot' is now simply
'resolveImport', taking a single 'UnresolvedImport' and resolving it
to a 'FindResult' (usually a 'Module').
Other changes:
- Cache the result of looking up GHC.Essentials (in TcM and DsM
environments) to avoid redundant work.
This reduces allocations on LinkableUsage01 and hard_hole_fits.
- Properly look up known entities for StaticPointers like we do for
other known entities everywhere else. This allows e.g. modules in
ghc-internal to use -XStaticPointers.
- When using multiple home units, we are now careful to handle the
situation in which we may have multiple GHC.Essentials modules
around. See the new tests under 'driver/multipleHomeUnits'.
- - - - -
162a0fc6 by Wolfgang Jeltsch at 2026-08-12T18:08:39-04:00
Improve the documentation of `--show-iface`
This change in particular gets rid of the claim that `--show-iface`
writes *the* contents of the interface file in question. It doesn’t do
that; it only writes those parts that are likely of interest to a human
reader.
- - - - -
3db5ba62 by Sylvain Henry at 2026-08-12T18:08:47-04:00
RTS: fix LDV profiler's slop skipping (#27585)
processHeapForDead was the one heap scanner not updated for the slop
marker encoding introduced in #19048. It still assumed slop is zeroed:
while (p < bd->free && !*p) p++; // skip slop
so it stopped at the (StgWord)(-1) sentinel and passed it to
processHeapClosureForDead. IS_FORWARDING_PTR(-1) holds, hence a garbage
size was read out of LDVW and the scan ran off the block, tripping
ASSERT(p == bd->free) on a debug RTS and silently corrupting the census
otherwise.
The loop was hand-copied in four places, so factor it out into skipSlop
in ClosureMacros.h and use it in ProfHeap.c, Sanity.c, Printer.c and
LdvProfile.c.
Co-Authored-By: Claude Opus 5 (1M context) <noreply(a)anthropic.com>
- - - - -
a151864c by Alan Zimmerman at 2026-08-12T18:08:50-04:00
EPA: Remove al_trailing from AnnList
It was not being used
- - - - -
a05b1535 by Simon Jakobi at 2026-08-12T18:08:53-04:00
Testsuite: widen InstanceMatching acceptance window to 5% (#27673)
...in order to unblock CI.
Assisted-by: Claude Fable 5
- - - - -
817 changed files:
- changelog.d/fix-heap-census-large-arrays-19048
- + changelog.d/refactor-known-names
- compiler/GHC.hs
- + compiler/GHC/Builtin.hs
- + compiler/GHC/Builtin/KnownKeys.hs
- + compiler/GHC/Builtin/KnownOccs.hs
- + compiler/GHC/Builtin/Modules.hs
- − compiler/GHC/Builtin/Names.hs
- − compiler/GHC/Builtin/Names/TH.hs
- compiler/GHC/Builtin/PrimOps.hs
- compiler/GHC/Builtin/PrimOps/Casts.hs
- compiler/GHC/Builtin/PrimOps/Ids.hs
- + compiler/GHC/Builtin/TH.hs
- compiler/GHC/Builtin/Uniques.hs
- compiler/GHC/Builtin/Uniques.hs-boot
- − compiler/GHC/Builtin/Utils.hs
- + compiler/GHC/Builtin/WiredIn/Ids.hs
- compiler/GHC/Builtin/Types/Prim.hs → compiler/GHC/Builtin/WiredIn/Prim.hs
- compiler/GHC/Builtin/Types/Literals.hs → compiler/GHC/Builtin/WiredIn/TypeLits.hs
- compiler/GHC/Builtin/Types.hs → compiler/GHC/Builtin/WiredIn/Types.hs
- compiler/GHC/Builtin/Types.hs-boot → compiler/GHC/Builtin/WiredIn/Types.hs-boot
- compiler/GHC/ByteCode/Asm.hs
- compiler/GHC/Core.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/DataCon.hs
- compiler/GHC/Core/FVs.hs
- compiler/GHC/Core/FamInstEnv.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/CprAnal.hs
- compiler/GHC/Core/Opt/DmdAnal.hs
- compiler/GHC/Core/Opt/LiberateCase.hs
- compiler/GHC/Core/Opt/OccurAnal.hs
- compiler/GHC/Core/Opt/SetLevels.hs
- compiler/GHC/Core/Opt/Simplify/Env.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Opt/SpecConstr.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Core/Opt/WorkWrap/Utils.hs
- compiler/GHC/Core/Ppr.hs
- compiler/GHC/Core/Predicate.hs
- compiler/GHC/Core/Rules.hs
- compiler/GHC/Core/SimpleOpt.hs
- compiler/GHC/Core/Subst.hs
- compiler/GHC/Core/TyCo/FVs.hs
- compiler/GHC/Core/TyCo/Rep.hs
- compiler/GHC/Core/TyCon.hs
- compiler/GHC/Core/Type.hs
- compiler/GHC/Core/Unfold.hs
- compiler/GHC/Core/Unify.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToIface.hs
- compiler/GHC/CoreToStg.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Driver/Backpack.hs
- compiler/GHC/Driver/Config/Tidy.hs
- compiler/GHC/Driver/Downsweep.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Env.hs
- compiler/GHC/Driver/Env/KnotVars.hs
- compiler/GHC/Driver/Env/Types.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Main/Hsc.hs
- compiler/GHC/Driver/Main/Passes.hs
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/MakeFile.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Driver/Plugins.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/ImpExp.hs
- compiler/GHC/Hs/Lit.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.hs
- compiler/GHC/HsToCore/Arrows.hs
- compiler/GHC/HsToCore/Binds.hs
- compiler/GHC/HsToCore/Expr.hs
- compiler/GHC/HsToCore/Foreign/C.hs
- compiler/GHC/HsToCore/Foreign/Call.hs
- compiler/GHC/HsToCore/Foreign/JavaScript.hs
- compiler/GHC/HsToCore/Foreign/Utils.hs
- compiler/GHC/HsToCore/Foreign/Wasm.hs
- compiler/GHC/HsToCore/ListComp.hs
- compiler/GHC/HsToCore/Match.hs
- compiler/GHC/HsToCore/Match/Literal.hs
- compiler/GHC/HsToCore/Monad.hs
- compiler/GHC/HsToCore/Pmc/Check.hs
- compiler/GHC/HsToCore/Pmc/Desugar.hs
- compiler/GHC/HsToCore/Pmc/Ppr.hs
- compiler/GHC/HsToCore/Pmc/Solver.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/HsToCore/Types.hs
- compiler/GHC/HsToCore/Usage.hs
- compiler/GHC/HsToCore/Utils.hs
- compiler/GHC/Iface/Binary.hs
- compiler/GHC/Iface/Env.hs
- − compiler/GHC/Iface/Env.hs-boot
- compiler/GHC/Iface/Errors/Ppr.hs
- compiler/GHC/Iface/Errors/Types.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Iface/Load.hs
- compiler/GHC/Iface/Make.hs
- compiler/GHC/Iface/Recomp.hs
- compiler/GHC/Iface/Syntax.hs
- compiler/GHC/Iface/Tidy.hs
- compiler/GHC/Iface/Type.hs
- compiler/GHC/IfaceToCore.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Annotation.hs
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Header.hs
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Plugins.hs
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Rename/Expr.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/Unbound.hs
- compiler/GHC/Rename/Utils.hs
- compiler/GHC/Runtime/Context.hs
- compiler/GHC/Runtime/Debugger.hs
- compiler/GHC/Runtime/Eval.hs
- compiler/GHC/Runtime/Heap/Inspect.hs
- compiler/GHC/Runtime/Interpreter.hs
- compiler/GHC/Runtime/Loader.hs
- compiler/GHC/Stg/BcPrep.hs
- compiler/GHC/Stg/Unarise.hs
- compiler/GHC/StgToByteCode.hs
- compiler/GHC/StgToCmm/Bind.hs
- compiler/GHC/StgToCmm/DataCon.hs
- compiler/GHC/StgToCmm/Env.hs
- compiler/GHC/StgToCmm/Foreign.hs
- compiler/GHC/StgToCmm/Lit.hs
- compiler/GHC/StgToCmm/Ticky.hs
- compiler/GHC/StgToJS/Apply.hs
- compiler/GHC/StgToJS/Arg.hs
- compiler/GHC/StgToJS/Expr.hs
- compiler/GHC/StgToJS/FFI.hs
- compiler/GHC/StgToJS/Linker/Utils.hs
- compiler/GHC/StgToJS/Utils.hs
- compiler/GHC/Tc/Deriv.hs
- compiler/GHC/Tc/Deriv/Functor.hs
- compiler/GHC/Tc/Deriv/Generate.hs
- compiler/GHC/Tc/Deriv/Generics.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/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/Export.hs
- compiler/GHC/Tc/Gen/Expr.hs
- 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/Pat.hs
- compiler/GHC/Tc/Gen/Sig.hs
- compiler/GHC/Tc/Gen/Splice.hs
- compiler/GHC/Tc/Instance/Class.hs
- compiler/GHC/Tc/Instance/FunDeps.hs
- compiler/GHC/Tc/Instance/Typeable.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Tc/Plugin.hs
- compiler/GHC/Tc/Solver.hs
- compiler/GHC/Tc/Solver/Default.hs
- compiler/GHC/Tc/Solver/Dict.hs
- compiler/GHC/Tc/Solver/FunDeps.hs
- compiler/GHC/Tc/Solver/InertSet.hs
- compiler/GHC/Tc/Solver/Monad.hs
- compiler/GHC/Tc/Solver/Rewrite.hs
- compiler/GHC/Tc/TyCl.hs
- compiler/GHC/Tc/TyCl/Build.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/Constraint.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Types/LclEnv.hs
- compiler/GHC/Tc/Types/Origin.hs
- compiler/GHC/Tc/Utils/Backpack.hs
- compiler/GHC/Tc/Utils/Concrete.hs
- compiler/GHC/Tc/Utils/Env.hs
- compiler/GHC/Tc/Utils/Instantiate.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/Tc/Utils/TcType.hs
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/Tc/Validity.hs
- compiler/GHC/Tc/Zonk/Type.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/DefaultEnv.hs
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/Hint.hs
- compiler/GHC/Types/Hint/Ppr.hs
- compiler/GHC/Types/Id/Make.hs
- compiler/GHC/Types/Literal.hs
- compiler/GHC/Types/Name.hs
- compiler/GHC/Types/Name/Cache.hs
- compiler/GHC/Types/Name/Ppr.hs
- compiler/GHC/Types/Name/Reader.hs
- compiler/GHC/Types/RepType.hs
- compiler/GHC/Types/TyThing.hs
- compiler/GHC/Types/Unique.hs
- compiler/GHC/Types/Unique/FM.hs
- + compiler/GHC/Types/UnresolvedImport.hs
- compiler/GHC/Types/Var.hs
- compiler/GHC/Unit.hs
- compiler/GHC/Unit/External.hs
- compiler/GHC/Unit/External/Index.hs
- compiler/GHC/Unit/External/ModuleOrigin.hs
- compiler/GHC/Unit/External/Providers.hs
- compiler/GHC/Unit/Finder.hs
- compiler/GHC/Unit/Finder/Types.hs
- compiler/GHC/Unit/Module/Deps.hs
- compiler/GHC/Unit/Module/ModSummary.hs
- compiler/GHC/Unit/State.hs
- compiler/GHC/Unit/Types.hs
- compiler/GHC/Utils/Binary.hs
- − compiler/GHC/Utils/Binary/Typeable.hs
- compiler/Language/Haskell/Syntax/Expr.hs
- compiler/ghc.cabal.in
- docs/users_guide/separate_compilation.rst
- docs/users_guide/using.rst
- ghc/GHCi/UI.hs
- ghc/GHCi/UI/Monad.hs
- ghc/Main.hs
- libraries/base/base.cabal.in
- libraries/base/src/Control/Applicative.hs
- libraries/base/src/Control/Concurrent.hs
- libraries/base/src/Control/Concurrent/Chan.hs
- libraries/base/src/Control/Concurrent/QSem.hs
- libraries/base/src/Control/Concurrent/QSemN.hs
- libraries/base/src/Data/Array/Byte.hs
- libraries/base/src/Data/Bifoldable.hs
- libraries/base/src/Data/Bifoldable1.hs
- libraries/base/src/Data/Bifunctor.hs
- libraries/base/src/Data/Bitraversable.hs
- libraries/base/src/Data/Bool.hs
- libraries/base/src/Data/Complex.hs
- libraries/base/src/Data/Data.hs
- libraries/base/src/Data/Enum.hs
- libraries/base/src/Data/Fixed.hs
- libraries/base/src/Data/Foldable1.hs
- libraries/base/src/Data/Functor/Classes.hs
- libraries/base/src/Data/Functor/Compose.hs
- libraries/base/src/Data/Functor/Contravariant.hs
- libraries/base/src/Data/Functor/Product.hs
- libraries/base/src/Data/Functor/Sum.hs
- libraries/base/src/Data/List.hs
- libraries/base/src/Data/List/NonEmpty.hs
- libraries/base/src/Data/List/NubOrdSet.hs
- libraries/base/src/Data/Semigroup.hs
- libraries/base/src/Data/Version.hs
- libraries/base/src/GHC/Base.hs
- libraries/base/src/GHC/ByteOrder.hs
- + libraries/base/src/GHC/Essentials.hs
- libraries/base/src/GHC/Exts.hs
- libraries/base/src/GHC/Fingerprint.hs
- libraries/base/src/GHC/RTS/Flags.hs
- libraries/base/src/GHC/ResponseFile.hs
- libraries/base/src/GHC/Stats.hs
- libraries/base/src/GHC/Weak/Finalize.hs
- libraries/base/src/Numeric.hs
- libraries/base/src/Prelude.hs
- libraries/base/src/System/CPUTime/Posix/ClockGetTime.hsc
- libraries/base/src/System/CPUTime/Posix/RUsage.hsc
- libraries/base/src/System/CPUTime/Posix/Times.hsc
- libraries/base/src/System/CPUTime/Unsupported.hs
- libraries/base/src/System/Console/GetOpt.hs
- libraries/base/src/System/Exit.hs
- libraries/base/src/System/IO.hs
- libraries/base/src/System/IO/OS.hs
- libraries/base/src/System/IO/Unsafe.hs
- libraries/base/src/System/Info.hs
- libraries/base/src/System/Timeout.hs
- libraries/base/src/Text/Printf.hs
- libraries/base/src/Text/Read.hs
- libraries/base/src/Text/Show/Functions.hs
- libraries/binary
- libraries/ghc-experimental/src/Data/Sum/Experimental.hs
- libraries/ghc-experimental/src/Data/Tuple/Experimental.hs
- libraries/ghc-experimental/src/GHC/Profiling/Eras.hs
- libraries/ghc-experimental/src/Prelude/Experimental.hs
- libraries/ghc-internal/codepages/MakeTable.hs
- libraries/ghc-internal/ghc-internal.cabal.in
- libraries/ghc-internal/include/RtsIfaceSymbols.h
- libraries/ghc-internal/src/GHC/Internal/AllocationLimitHandler.hs
- libraries/ghc-internal/src/GHC/Internal/Arr.hs
- libraries/ghc-internal/src/GHC/Internal/ArrayArray.hs
- libraries/ghc-internal/src/GHC/Internal/Base.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/GMP.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Backend/Native.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/BigNat.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/BigNat.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Bignum/Integer.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Integer.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Bignum/Natural.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Natural.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Bignum/Primitives.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/WordArray.hs
- libraries/ghc-internal/src/GHC/Internal/Bits.hs
- libraries/ghc-internal/src/GHC/Internal/ByteOrder.hs
- libraries/ghc-internal/src/GHC/Internal/CString.hs
- libraries/ghc-internal/src/GHC/Internal/Char.hs
- libraries/ghc-internal/src/GHC/Internal/Classes.hs
- libraries/ghc-internal/src/GHC/Internal/Classes/IP.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/POSIX/Const.hsc
- libraries/ghc-internal/src/GHC/Internal/Conc/Signal.hs
- libraries/ghc-internal/src/GHC/Internal/Conc/Sync.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/Category.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
- libraries/ghc-internal/src/GHC/Internal/Control/Monad.hs
- 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.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/ST/Imp.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/ST/Lazy.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/ST/Lazy/Imp.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/Zip.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Bits.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Coerce.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/Foldable.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Function.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor/Const.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor/Identity.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Functor/Utils.hs
- libraries/ghc-internal/src/GHC/Internal/Data/IORef.hs
- libraries/ghc-internal/src/GHC/Internal/Data/List.hs
- libraries/ghc-internal/src/GHC/Internal/Data/List/NonEmpty.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Maybe.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Monoid.hs
- libraries/ghc-internal/src/GHC/Internal/Data/NonEmpty.hs
- libraries/ghc-internal/src/GHC/Internal/Data/OldList.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Ord.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Proxy.hs
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- testsuite/tests/simplCore/should_compile/str-rules.hs
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- testsuite/tests/tcplugins/EmitWantedPlugin.hs
- testsuite/tests/tcplugins/RewritePlugin.hs
- testsuite/tests/tcplugins/T26395_Plugin.hs
- testsuite/tests/tcplugins/TyFamPlugin.hs
- testsuite/tests/th/T14741.hs
- testsuite/tests/th/T21547.stderr
- testsuite/tests/th/T26568.stderr
- + testsuite/tests/th/T27013th.hs
- testsuite/tests/th/TH_Roles2.stderr
- + testsuite/tests/th/TH_pragmaSpecOld.hs
- + testsuite/tests/th/TH_pragmaSpecOld.stderr
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- testsuite/tests/typecheck/should_compile/T13032.stderr
- testsuite/tests/typecheck/should_compile/T14273.stderr
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- testsuite/tests/typecheck/should_fail/TcStaticPointersFail02.stderr
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- testsuite/tests/typecheck/should_fail/tcfail097.stderr
- testsuite/tests/typecheck/should_fail/tcfail133.stderr
- testsuite/tests/typecheck/should_run/T22510.stdout
- testsuite/tests/unboxedsums/UbxSumLevPoly.hs
- testsuite/tests/unboxedsums/unboxedsums_unit_tests.hs
- testsuite/tests/warnings/should_compile/DerivingTypeable.stderr
- utils/check-exact/ExactPrint.hs
- utils/check-exact/Main.hs
- utils/check-exact/Transform.hs
- utils/check-exact/Utils.hs
- utils/genprimopcode/Main.hs
- utils/haddock/haddock-api/src/Haddock/Convert.hs
- utils/haddock/haddock-api/src/Haddock/GhcUtils.hs
- utils/haddock/haddock-api/src/Haddock/Interface.hs
- utils/haddock/haddock-api/src/Haddock/Interface/AttachInstances.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Create.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Rename.hs
- utils/haddock/haddock-api/src/Haddock/Types.hs
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/6c5a1148ea179a11bd5f31b88b2a2b…
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[Git][ghc/ghc][wip/az/ghc-cpp] 12 commits: Word64Map: add compareSize
by Alan Zimmerman (＠alanz) 12 Aug '26
by Alan Zimmerman (＠alanz) 12 Aug '26
12 Aug '26
Alan Zimmerman pushed to branch wip/az/ghc-cpp at Glasgow Haskell Compiler / GHC
Commits:
3a552476 by Simon Jakobi at 2026-08-09T15:20:06-04:00
Word64Map: add compareSize
compareSize m c compares the size of a map to an Int, but unlike
compare (size m) c it stops traversing the map once the outcome is
determined.
Based on https://github.com/haskell/containers/pull/1139
Assisted-by: Claude Opus 5
- - - - -
6e2c99d8 by Simon Jakobi at 2026-08-09T15:20:06-04:00
Use a pigeonhole sort for deterministic UniqDFM iteration
Deterministic UniqDFM iteration used a list mergesort, allocating O(n
log n) cons cells and contributing significantly to compiler allocations
(#27459).
Use a pigeonhole sort where appropriate, while retaining the mergesort
fallback. See Note [Sorting a UDFM] and Note [Cost of deterministic
iteration].
The peak_megabytes_allocated increase for LinkableUsage02 is probably
due to GC timing noise. See #27613.
-------------------------
Metric Decrease:
InstanceMatching
InstanceMatching1
ManyAlternatives
T12707
T13379
T13719
T24471
T27336
T5321FD
T5321Fun
T783
Metric Increase 'peak_megabytes_allocated':
LinkableUsage02
-------------------------
Assisted-by: gpt-5.6-sol via Codex CLI
- - - - -
a938ab12 by sheaf at 2026-08-09T15:20:48-04:00
Testsuite: don't measure max residency for T27336
We really care more about total allocations for this test, so this commit
removes the maximum residency measurement.
- - - - -
7d94bb78 by Alan Zimmerman at 2026-08-09T15:21:29-04:00
EPA: Remove LocatedE, replace with LocatedA
This gets rid of one more LocatedXXX occurrence
- - - - -
9df24b7e by sheaf at 2026-08-10T14:28:30-04:00
hie.yaml: use a polyglot shell/batch script
This commit merges hie-bios and hie-bios.bat into a single polyglot
script. This avoids Windows users having to manually update hie.yaml
in order to be able to use HLS.
- - - - -
7f75c588 by Alan Zimmerman at 2026-08-10T14:29:11-04:00
EPA: Remove type parameter from AnnList
This is a step towards cutting AnnList down to its core for formatting
lists only
- - - - -
e8d1a0d6 by Bernhard M. Wiedemann at 2026-08-10T21:31:23-04:00
driver: Link object files in a deterministic order
The object files handed to the linker come from the HomePackageTable,
which is ordered by the order in which modules finished compiling. With
-j1 that is the build plan order, with -jN it is whatever the scheduler
produced, so the same sources can link to different (but equivalent)
binaries.
The order reaches the output: .text and .rodata contributions are
concatenated in link order, so e.g. building the hdav executable of the
DAV package twice, once with -j1 and once with -j4, yields two binaries
that differ in ~100kB of section contents.
Sort the home modules by module before collecting their linkables,
guarded under `Opt_ObjectDeterminism` .
Fixes #27612
Signed-off-by: Bernhard M. Wiedemann <bwiedemann(a)suse.de>
- - - - -
556db2f3 by sheaf at 2026-08-10T21:32:06-04:00
Reduce SpecConstr threshold in GHC.Tc.Solver.Rewrite
As remarked in #27628, this module currently sits on a knife's edge: if
the body of 'simplifyArgsWorker' is made even a tiny bit smaller, then
SpecConstr suddenly kicks in and causes disastrous reboxing of the
LiftingContext argument.
To make this less likely to happen, this commit lowers the SpecConstr
threshold.
- - - - -
6183044a by Alan Zimmerman at 2026-08-12T21:42:49+01:00
GHC-CPP: Initial implementation
Processes
#define FOO
#ifdef FOO
x = 1
#endif
Into
[ITcppIgnored [L loc ITcppDefine]
,ITcppIgnored [L loc ITcppIfdef]
,ITvarid "x"
,ITequal
,ITinteger (IL {il_text = SourceText "1", il_neg = False, il_value = 1})
,ITcppIgnored [L loc ITcppEndif]
,ITeof]
In time, ITcppIgnored will be pushed into a comment
Tidy up before re-visiting the continuation mechanic
Switch preprocessor to continuation passing style
Proof of concept, needs tidying up
Small cleanup
Get rid of some cruft
Summary: Patch:
Author: Alan Zimmerman <alan.zimm(a)gmail.com>
Date: 2025-10-12 16:23:56 +0100
Summary: Patch: rebase-and-tests-pass
Author: Alan Zimmerman <alan.zimm(a)gmail.com>
Date: 2025-10-12 14:19:04 +0100
Rebase, and all tests pass except whitespace for generated parser
Starting to integrate.
Need to get the pragma recognised and set
Make cppTokens extend to end of line, and process CPP comments
Remove unused ITcppDefined
Allow spaces between # and keyword for preprocessor directive
Process CPP continuation lines
They are emited as separate ITcppContinue tokens.
Perhaps the processing should be more like a comment, and keep on
going to the end.
BUT, the last line needs to be slurped as a whole.
Accumulate CPP continuations, process when ready
Can be simplified further, we only need one CPP token
Simplify Lexer interface. Only ITcpp
We transfer directive lines through it, then parse them from scratch
in the preprocessor.
Deal with directive on last line, with no trailing \n
Start parsing and processing the directives
Prepare for processing include files
Move PpState into PreProcess
And initParserState, initPragState too
Process nested include files
Also move PpState out of Lexer.x, so it is easy to evolve it in a ghci
session, loading utils/check-cpp/Main.hs
Split into separate files
Starting on expression parser.
But it hangs. Time for Text.Parsec.Expr
Start integrating the ghc-cpp work
From https://github.com/alanz/ghc-cpp
WIP
Fixup after rebase
WIP
Fixup after rebase, including all tests pass
Change pragma usage to GHC_CPP from GhcCPP
Some comments
Reformat
Delete unused file
Rename module Parse to ParsePP
Clarify naming in the parser
WIP. Switching to alex/happy to be able to work in-tree
Since Parsec is not available
Layering is now correct
- GHC lexer, emits CPP tokens
- accumulated in Preprocessor state
- Lexed by CPP lexer, CPP command extracted, tokens concated with
spaces (to get rid of token pasting via comments)
- if directive lexed and parsed by CPP lexer/parser, and evaluated
First example working
Loading Example1.hs into ghci, getting the right results
```
{-# LANGUAGE GHC_CPP #-}
module Example1 where
y = 3
x =
"hello"
"bye now"
foo = putStrLn x
```
Rebase, and all tests pass except whitespace for generated parser
info: patch template saved to `-`
More plumbing. Ready for testing tomorrow.
Proress. Renamed module State from Types
And at first blush it seems to handle preprocessor scopes properly.
Insert basic GHC version macros into parser
__GLASGOW_HASKELL__
__GLASGOW_HASKELL_FULL_VERSION__
__GLASGOW_HASKELL_PATCHLEVEL1__
__GLASGOW_HASKELL_PATCHLEVEL2__
Re-sync check-cpp for easy ghci work
Get rid of warnings
Rework macro processing, in check-cpp
Macros kept at the top level, looked up via name, multiple arity
versions per name can be stored
WIP. Can crack arguments for #define
Next step it to crack out args in an expansion
WIP on arg parsing.
Progress. Still screwing up nested parens.
Seems to work, but has redundant code
Remove redundant code
Reformat
Expand args, single pass
Still need to repeat until fixpoint
Fixed point expansion
Sync the playground to compiler
Working on dumping the GHC_CPP result
But We need to keep the BufSpan in a comment
Keep BufSpan in queued comments in GHC.Parser.Lexer
Getting close to being able to print the combined tokens
showing what is in and what is out
First implementation of dumpGhcCpp.
Example output
First dumps all macros in the state, then the source, showing which
lines are in and which are out
------------------------------
- |#define FOO(A,B) A + B
- |#define FOO(A,B,C) A + B + C
- |#if FOO(1,FOO(3,4)) == 8
- |-- a comment
|x = 1
- |#else
- |x = 5
- |#endif
Clean up a bit
Add -ddump-ghc-cpp option and a test based on it
Restore Lexer.x rules, we need them for continuation lines
Lexer.x: trying to sort out the span for continuations
- We need to match on \n at the end of the line
- We cannot simply back up for it
Inserts predefined macros. But does not dump properly
Because the cpp tokens have a trailing newline
Remove unnecessary LExer rules
We *need* the ones that explicitly match to the end of the line.
Generate correct span for ITcpp
Dump now works, except we do not render trailing `\` for continuation
lines. This is good enough for use in test output.
Reduce duplication in lexer
Tweaks
Insert min_version predefined macros into state
The mechanism now works. Still need to flesh out the full set.
Trying my alternative pragma syntax.
It works, but dumpGhcCpp is broken, I suspect from the ITcpp token
span update.
Pragma extraction now works, with both CPP and GHC_CPP
For the following
{-# LANGUAGE CPP #-}
#if __GLASGOW_HASKELL__ >= 913
{-# LANGUAGE GHC_CPP #-}
#endif
We will enable GHC_CPP only
Remove some tracing
Fix test exes for changes
For GHC_CPP tests, normalise config-time-based macros
WIP
WIP again. What is wrong?
Revert to dynflags for normal not pragma lexing
Working on getting check-exact to work properly
Passes CppCommentPlacement test
Starting on exact printing with GHC_CPP
While overriding normal CPP
Correctly store CPP ignored tokens as comments
By populating the lexeme string in it, based on the bufpos
WIP
Simplifying
Update the active state logic
Work the new logic into the mainline code
Process `defined` operator
Manage lexer state while skipping tokens
There is very intricate layout-related state used when lexing. If a
CPP directive blanks out some tokens, store this state when the
blanking starts, and restore it when they are no longer being blanked.
Track the last token buffer index, for ITCppIgnored
We need to attach the source being skipped in an ITCppIgnored token.
We cannot simply use its BufSpan as an index into the underlying
StringBuffer as it counts unicode chars, not bytes.
So we update the lexer state to store the starting StringBuffer
location for the last token, and use the already-stored length to
extract the correct portion of the StringBuffer being parsed.
Process the ! operator in GHC_CPP expressions
Predefine a constant when GHC_CPP is being used.
WIP
Skip lines directly in the lexer when required
Properly manage location when accepting tokens again
Seems to be working now, for Example9
Remove tracing
Fix parsing '*' in block comments
Instead of replacing them with '-'
Keep the trailing backslash in a ITcpp token
Deal with only enabling one section of a group.
A group is an instance of a conditional introduced by
#if/#ifdef/#ifndef,
and ending at the final #endif, including intermediate #elsif sections
Replace remaining identifiers with 0 when evaluating
As per the spec
Snapshot before rebase
Skip non-processed lines starting with #
Export generateMacros so we can use it in ghc-exactprint
Fix rebase
Expose initParserStateWithMacrosString
Fix buggy lexer cppSkip
It was skipping all lines, not just ones prefixed by #
Fix evaluation of && to use the correct operator
Deal with closing #-} at the start of a line
Add the MIN_VERSION_GLASGOW_HASKELL predefined macro
Include MIN_VERSION_GLASGOW_HASKELL in GhcCpp01.stderr
Use a strict map for macro defines
Process TIdentifierLParen
Which only matters at the start of #define
Do not provide TIdentifierLParen paren twice
Handle whitespace between identifier and '(' for directive only
Expose some Lexer bitmap manipulation helpers
Deal with line pragmas as tokens
Blows up for dumpGhcCpp though
Allow strings delimited by a single quote too
Allow leading whitespace on cpp directives
As per https://timsong-cpp.github.io/cppwp/n4140/cpp#1
Implement GHC_CPP undef
Sort out expansion of no-arg macros, in a context with args
And make the expansion bottom out, in the case of recursion
Fix GhcCpp01 test
The LINE pragma stuff works in ghc-exactprint when specifically
setting flag to emit ITline_pragma tokens
Process comments in CPP directives
Correctly lex pragmas with finel #-} on a newline
Do not process CPP-style comments
Allow cpp-style comments when GHC_CPP enabled
Return other pragmas as cpp ignored when GHC_CPP active
Reorganise getOptionsFromFile for use in ghc-exactprint
We want to be able to inject predefined macro definitions into the
parser preprocessor state for when we do a hackage roundtrip.
Tweak testing
Only allow unknown cpp pragmas with # in left margin
Require # against left margin for all GHC_CPP directives
Fix CPP directives appearing in pragmas
And add a test for error reporting for missing `#if`
Starting to report GHC_CPP errors using GHC machinery
More GHC_CPP diagnostic results
WIP on converting error calls to GHC diagnostics in GHC_CPP
Working on CPP diagnostic reporting
Tweak some tests/lint warnings
More error reporting in Macro
Some cleanups
Some cleanup
GHC_CPP: Working on improving error reporting
Harvest some commonality
Use PPM as Maybe inside PP
Clean up a bit
Fix GhcCpp01 test
I think this needs to be made more robust. Likely by not dumping the
(pre-)defined macros.
info: patch template saved to `-`
info: patch template saved to `-`
- - - - -
990ff9d0 by Alan Zimmerman at 2026-08-12T21:42:49+01:00
GHC_CPP: delete utils/check-cpp
It is not needed
- - - - -
ebf72c24 by Alan Zimmerman at 2026-08-12T21:42:49+01:00
GHC_CPP: remove #include processing
We do not support it
- - - - -
f6c309b6 by Alan Zimmerman at 2026-08-12T21:42:49+01:00
GHC_CPP: move Eval.hs into GHC.Parser.PreProcess.Macro
- - - - -
99 changed files:
- + changelog.d/link-deterministic-order
- compiler/GHC.hs
- compiler/GHC/Cmm/Lexer.x
- compiler/GHC/Cmm/Parser.y
- compiler/GHC/Cmm/Parser/Monad.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/Backpack.hs
- compiler/GHC/Driver/Config/Parser.hs
- compiler/GHC/Driver/Downsweep.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Main.hs
- compiler/GHC/Driver/Main/Interactive.hs
- compiler/GHC/Driver/Main/Passes.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Hs/Binds.hs
- compiler/GHC/Hs/Decls.hs
- compiler/GHC/Hs/Dump.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/Pat.hs
- compiler/GHC/Hs/Utils.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Parser.hs-boot
- 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/Header.hs
- compiler/GHC/Parser/Lexer.x
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Parser/PostProcess/Haddock.hs
- + compiler/GHC/Parser/PreProcess.hs
- + compiler/GHC/Parser/PreProcess/Eval.hs
- + compiler/GHC/Parser/PreProcess/Lexer.x
- + compiler/GHC/Parser/PreProcess/Macro.hs
- + compiler/GHC/Parser/PreProcess/ParsePP.hs
- + compiler/GHC/Parser/PreProcess/Parser.y
- + compiler/GHC/Parser/PreProcess/ParserM.hs
- + compiler/GHC/Parser/PreProcess/State.hs
- compiler/GHC/Parser/Utils.hs
- compiler/GHC/Rename/Pat.hs
- compiler/GHC/SysTools/Cpp.hs
- compiler/GHC/Tc/Solver/Rewrite.hs
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/Unique/DFM.hs
- compiler/GHC/Unit/Module/Warnings.hs
- compiler/ghc.cabal.in
- docs/users_guide/debugging.rst
- ghc/GHCi/UI.hs
- − hadrian/hie-bios
- hadrian/hie-bios.bat
- hadrian/src/Rules/SourceDist.hs
- hie.yaml
- libraries/ghc-internal/src/GHC/Internal/LanguageExtensions.hs
- testsuite/tests/count-deps/CountDepsParser.stdout
- testsuite/tests/driver/T4437.hs
- testsuite/tests/ghc-api/T11579.hs
- testsuite/tests/ghc-api/T25121_status.stdout
- testsuite/tests/ghc-api/exactprint/T22919.stderr
- testsuite/tests/ghc-api/exactprint/ZeroWidthSemi.stderr
- + testsuite/tests/ghc-cpp/GhcCpp01.hs
- + testsuite/tests/ghc-cpp/GhcCpp01.stderr
- + testsuite/tests/ghc-cpp/GhcCpp02.hs
- + testsuite/tests/ghc-cpp/GhcCpp02.stderr
- + testsuite/tests/ghc-cpp/all.T
- testsuite/tests/interface-stability/template-haskell-exports.stdout
- testsuite/tests/linters/notes.stdout
- testsuite/tests/linters/regex-linters/check-cpp.py
- testsuite/tests/module/mod185.stderr
- testsuite/tests/parser/should_compile/DumpParsedAst.stderr
- testsuite/tests/parser/should_compile/DumpParsedAstComments.stderr
- testsuite/tests/parser/should_compile/DumpRenamedAst.stderr
- testsuite/tests/parser/should_compile/DumpSemis.stderr
- testsuite/tests/parser/should_compile/DumpTypecheckedAst.stderr
- testsuite/tests/parser/should_compile/KindSigs.stderr
- testsuite/tests/parser/should_compile/T15279.stderr
- testsuite/tests/parser/should_compile/T20718.stderr
- testsuite/tests/parser/should_compile/T20846.stderr
- testsuite/tests/perf/compiler/all.T
- + testsuite/tests/printer/CppCommentPlacement.hs
- testsuite/tests/printer/Test20297.stdout
- testsuite/tests/printer/Test24533.stdout
- + utils/check-cpp/Example7.hs.ast
- + utils/check-cpp/Example7.hs.ast.new
- + utils/check-cpp/Example7.ppr.hs
- utils/check-exact/ExactPrint.hs
- utils/check-exact/Main.hs
- utils/check-exact/Parsers.hs
- utils/check-exact/Preprocess.hs
- utils/check-exact/Transform.hs
- utils/check-exact/Utils.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Hyperlinker/Parser.hs
- utils/haddock/haddock-api/src/Haddock/Parser.hs
- utils/haddock/haddock-api/src/Haddock/Types.hs
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12 Aug '26
Simon Jakobi pushed new branch wip/sjakobi/T27459 at Glasgow Haskell Compiler / GHC
--
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