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<h3 style="margin-top: 20px; margin-bottom: 10px;">
Simon Peyton Jones pushed to branch wip/T22439 at <a href="https://gitlab.haskell.org/ghc/ghc" style="color: #1068bf;">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4 style="margin-top: 10px; margin-bottom: 10px;">
Commits:
</h4>
<ul>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/430eccefaef1bc78a00a5327e6e485299be674a5" style="color: #1068bf;">430eccef</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-11-11T13:16:45-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>rts: Check for program_invocation_short_name via autoconf
Instead of assuming support on all Linuxes.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6dab0046b575e102bf3245fd63d5ac6bc6f4204d" style="color: #1068bf;">6dab0046</a></strong>
<div>
<span> by Matthew Pickering </span> <i> at 2022-11-11T13:17:22-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>driver: Fix -fdefer-diagnostics flag
The `withDeferredDiagnostics` wrapper wasn't doing anything because the
session it was modifying wasn't used in hsc_env. Therefore the fix is
simple, just push the `getSession` call into the scope of
`withDeferredDiagnostics`.
Fixes #22391
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d0c691b6110b11a43d5ea2685d17bc001d2298da" style="color: #1068bf;">d0c691b6</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2022-11-11T13:18:07-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Add a fast path for data constructor workers
See Note [Fast path for data constructors] in
GHC.Core.Opt.Simplify.Iteration
This bypasses lots of expensive logic, in the special case of
applications of data constructors. It is a surprisingly worthwhile
improvement, as you can see in the figures below.
Metrics: compile_time/bytes allocated
------------------------------------------------
CoOpt_Read(normal) -2.0%
CoOpt_Singletons(normal) -2.0%
ManyConstructors(normal) -1.3%
T10421(normal) -1.9% GOOD
T10421a(normal) -1.5%
T10858(normal) -1.6%
T11545(normal) -1.7%
T12234(optasm) -1.3%
T12425(optasm) -1.9% GOOD
T13035(normal) -1.0% GOOD
T13056(optasm) -1.8%
T13253(normal) -3.3% GOOD
T15164(normal) -1.7%
T15304(normal) -3.4%
T15630(normal) -2.8%
T16577(normal) -4.3% GOOD
T17096(normal) -1.1%
T17516(normal) -3.1%
T18282(normal) -1.9%
T18304(normal) -1.2%
T18698a(normal) -1.2% GOOD
T18698b(normal) -1.5% GOOD
T18923(normal) -1.3%
T1969(normal) -1.3% GOOD
T19695(normal) -4.4% GOOD
T21839c(normal) -2.7% GOOD
T21839r(normal) -2.7% GOOD
T4801(normal) -3.8% GOOD
T5642(normal) -3.1% GOOD
T6048(optasm) -2.5% GOOD
T9020(optasm) -2.7% GOOD
T9630(normal) -2.1% GOOD
T9961(normal) -11.7% GOOD
WWRec(normal) -1.0%
geo. mean -1.1%
minimum -11.7%
maximum +0.1%
Metric Decrease:
T10421
T12425
T13035
T13253
T16577
T18698a
T18698b
T1969
T19695
T21839c
T21839r
T4801
T5642
T6048
T9020
T9630
T9961
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3c37d30b07fc85fe09452f4ce250aec42cb1d2e4" style="color: #1068bf;">3c37d30b</a></strong>
<div>
<span> by Krzysztof Gogolewski </span> <i> at 2022-11-11T19:18:39+01:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Use a more efficient printer for code generation (#21853)
The changes in `GHC.Utils.Outputable` are the bulk of the patch
and drive the rest.
The types `HLine` and `HDoc` in Outputable can be used instead of `SDoc`
and support printing directly to a handle with `bPutHDoc`.
See Note [SDoc versus HDoc] and Note [HLine versus HDoc].
The classes `IsLine` and `IsDoc` are used to make the existing code polymorphic
over `HLine`/`HDoc` and `SDoc`. This is done for X86, PPC, AArch64, DWARF
and dependencies (printing module names, labels etc.).
Co-authored-by: Alexis King <lexi.lambda@gmail.com>
Metric Decrease:
CoOpt_Read
ManyAlternatives
ManyConstructors
T10421
T12425
T12707
T13035
T13056
T13253
T13379
T18140
T18282
T18698a
T18698b
T1969
T20049
T21839c
T21839r
T3064
T3294
T4801
T5321FD
T5321Fun
T5631
T6048
T783
T9198
T9233
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6b92b47fa2386ccb2f8264110ff7a827958fb7bf" style="color: #1068bf;">6b92b47f</a></strong>
<div>
<span> by Matthew Craven </span> <i> at 2022-11-11T18:32:14-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Weaken wrinkle 1 of Note [Scrutinee Constant Folding]
Fixes #22375.
Co-authored-by: Simon Peyton Jones <simon.peytonjones@gmail.com>
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/154c70f6c589aa6531cbeea4aa3ec06e0acaf690" style="color: #1068bf;">154c70f6</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2022-11-11T23:40:10+00:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Fix fragile RULE setup in GHC.Float
In testing my type-vs-constraint patch I found that the handling
of Natural literals was very fragile -- and I somehow tripped that
fragility in my work.
So this patch fixes the fragility.
See Note [realToFrac natural-to-float]
This made a big (9%) difference in one existing test in
perf/should_run/T1-359
Metric Decrease:
T10359
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/778c6adca2c995cd8a1b84394d4d5ca26b915dac" style="color: #1068bf;">778c6adc</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2022-11-11T23:40:10+00:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Type vs Constraint: finally nailed
This big patch addresses the rats-nest of issues that have plagued
us for years, about the relationship between Type and Constraint.
See #11715/#21623.
The main payload of the patch is:
* To introduce CONSTRAINT :: RuntimeRep -> Type
* To make TYPE and CONSTRAINT distinct throughout the compiler
Two overview Notes in GHC.Builtin.Types.Prim
* Note [TYPE and CONSTRAINT]
* Note [Type and Constraint are not apart]
This is the main complication.
The specifics
* New primitive types (GHC.Builtin.Types.Prim)
- CONSTRAINT
- ctArrowTyCon (=>)
- tcArrowTyCon (-=>)
- ccArrowTyCon (==>)
- funTyCon FUN -- Not new
See Note [Function type constructors and FunTy]
and Note [TYPE and CONSTRAINT]
* GHC.Builtin.Types:
- New type Constraint = CONSTRAINT LiftedRep
- I also stopped nonEmptyTyCon being built-in; it only needs to be wired-in
* Exploit the fact that Type and Constraint are distinct throughout GHC
- Get rid of tcView in favour of coreView.
- Many tcXX functions become XX functions.
e.g. tcGetCastedTyVar --> getCastedTyVar
* Kill off Note [ForAllTy and typechecker equality], in (old)
GHC.Tc.Solver.Canonical. It said that typechecker-equality should ignore
the specified/inferred distinction when comparein two ForAllTys. But
that wsa only weakly supported and (worse) implies that we need a separate
typechecker equality, different from core equality. No no no.
* GHC.Core.TyCon: kill off FunTyCon in data TyCon. There was no need for it,
and anyway now we have four of them!
* GHC.Core.TyCo.Rep: add two FunTyFlags to FunCo
See Note [FunCo] in that module.
* GHC.Core.Type. Lots and lots of changes driven by adding CONSTRAINT.
The key new function is sORTKind_maybe; most other changes are built
on top of that.
See also `funTyConAppTy_maybe` and `tyConAppFun_maybe`.
* Fix a longstanding bug in GHC.Core.Type.typeKind, and Core Lint, in
kinding ForAllTys. See new tules (FORALL1) and (FORALL2) in GHC.Core.Type.
(The bug was that before (forall (cv::t1 ~# t2). blah), where
blah::TYPE IntRep, would get kind (TYPE IntRep), but it should be
(TYPE LiftedRep). See Note [Kinding rules for types] in GHC.Core.Type.
* GHC.Core.TyCo.Compare is a new module in which we do eqType and cmpType.
Of course, no tcEqType any more.
* GHC.Core.TyCo.FVs. I moved some free-var-like function into this module:
tyConsOfType, visVarsOfType, and occCheckExpand. Refactoring only.
* GHC.Builtin.Types. Compiletely re-engineer boxingDataCon_maybe to
have one for each /RuntimeRep/, rather than one for each /Type/.
This dramatically widens the range of types we can auto-box.
See Note [Boxing constructors] in GHC.Builtin.Types
The boxing types themselves are declared in library ghc-prim:GHC.Types.
GHC.Core.Make. Re-engineer the treatment of "big" tuples (mkBigCoreVarTup
etc) GHC.Core.Make, so that it auto-boxes unboxed values and (crucially)
types of kind Constraint. That allows the desugaring for arrows to work;
it gathers up free variables (including dictionaries) into tuples.
See Note [Big tuples] in GHC.Core.Make.
There is still work to do here: #22336. But things are better than
before.
* GHC.Core.Make. We need two absent-error Ids, aBSENT_ERROR_ID for types of
kind Type, and aBSENT_CONSTRAINT_ERROR_ID for vaues of kind Constraint.
Ditto noInlineId vs noInlieConstraintId in GHC.Types.Id.Make;
see Note [inlineId magic].
* GHC.Core.TyCo.Rep. Completely refactor the NthCo coercion. It is now called
SelCo, and its fields are much more descriptive than the single Int we used to
have. A great improvement. See Note [SelCo] in GHC.Core.TyCo.Rep.
* GHC.Core.RoughMap.roughMatchTyConName. Collapse TYPE and CONSTRAINT to
a single TyCon, so that the rough-map does not distinguish them.
* GHC.Core.DataCon
- Mainly just improve documentation
* Some significant renamings:
GHC.Core.Multiplicity: Many --> ManyTy (easier to grep for)
One --> OneTy
GHC.Core.TyCo.Rep TyCoBinder --> GHC.Core.Var.PiTyBinder
GHC.Core.Var TyCoVarBinder --> ForAllTyBinder
AnonArgFlag --> FunTyFlag
ArgFlag --> ForAllTyFlag
GHC.Core.TyCon TyConTyCoBinder --> TyConPiTyBinder
Many functions are renamed in consequence
e.g. isinvisibleArgFlag becomes isInvisibleForAllTyFlag, etc
* I refactored FunTyFlag (was AnonArgFlag) into a simple, flat data type
data FunTyFlag
= FTF_T_T -- (->) Type -> Type
| FTF_T_C -- (-=>) Type -> Constraint
| FTF_C_T -- (=>) Constraint -> Type
| FTF_C_C -- (==>) Constraint -> Constraint
* GHC.Tc.Errors.Ppr. Some significant refactoring in the TypeEqMisMatch case
of pprMismatchMsg.
* I made the tyConUnique field of TyCon strict, because I
saw code with lots of silly eval's. That revealed that
GHC.Settings.Constants.mAX_SUM_SIZE can only be 63, because
we pack the sum tag into a 6-bit field. (Lurking bug squashed.)
Fixes
* #21530
Updates haddock submodule slightly.
Performance changes
~~~~~~~~~~~~~~~~~~~
I was worried that compile times would get worse, but after
some careful profiling we are down to a geometric mean 0.1%
increase in allocation (in perf/compiler). That seems fine.
There is a big runtime improvement in T10359
Metric Decrease:
LargeRecord
MultiLayerModulesTH_OneShot
T13386
T13719
Metric Increase:
T8095
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/360f5fec2eb430ac15145193d95120a5a6ca6812" style="color: #1068bf;">360f5fec</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2022-11-11T23:40:11+00:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Indent closing "#-}" to silence HLint
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e160cf4776f21a39adebfa8f5d4dcbe9ec6b0ffe" style="color: #1068bf;">e160cf47</a></strong>
<div>
<span> by Krzysztof Gogolewski </span> <i> at 2022-11-12T08:05:28-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Fix merge conflict in T18355.stderr
Fixes #22446
</pre>
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<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/294f907370fadd3313f8c5e6aa87a93c8b86f139" style="color: #1068bf;">294f9073</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2022-11-12T23:14:13+00:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Fix a trivial typo in dataConNonlinearType
Fixes #22416
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/268a3ce952f6be00a1dd164dc4d7acb346045e90" style="color: #1068bf;">268a3ce9</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-11-14T09:36:57-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>eventlog: Ensure that IPE output contains actual info table pointers
The refactoring in 866c736e introduced a rather subtle change in the
semantics of the IPE eventlog output, changing the eventlog field from
encoding info table pointers to "TNTC pointers" (which point to entry
code when tables-next-to-code is enabled). Fix this.
Fixes #22452.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d91db67928d1478589d98e349954800dc9a04a34" style="color: #1068bf;">d91db679</a></strong>
<div>
<span> by Matthew Pickering </span> <i> at 2022-11-14T16:48:10-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>testsuite: Add tests for T22347
These are fixed in recent versions but might as well add regression
tests.
See #22347
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8f6c576b0b9b82acf23c51ae8cb3c6e5bde61ab4" style="color: #1068bf;">8f6c576b</a></strong>
<div>
<span> by Matthew Pickering </span> <i> at 2022-11-14T16:48:45-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>testsuite: Improve output from tests which have failing pre_cmd
There are two changes:
* If a pre_cmd fails, then don't attempt to run the test.
* If a pre_cmd fails, then print the stdout and stderr from running that
command (which hopefully has a nice error message).
For example:
```
=====> 1 of 1 [0, 0, 0]
*** framework failure for test-defaulting-plugin(normal) pre_cmd failed: 2
** pre_cmd was "$MAKE -s --no-print-directory -C defaulting-plugin package.test-defaulting-plugin TOP={top}".
stdout:
stderr:
DefaultLifted.hs:19:13: error: [GHC-76037]
Not in scope: type constructor or class ‘Typ’
Suggested fix:
Perhaps use one of these:
‘Type’ (imported from GHC.Tc.Utils.TcType),
data constructor ‘Type’ (imported from GHC.Plugins)
|
19 | instance Eq Typ where
| ^^^
make: *** [Makefile:17: package.test-defaulting-plugin] Error 1
Performance Metrics (test environment: local):
```
Fixes #22329
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/2b7d5ccc4a022abfba3a6774639d30738a94ae85" style="color: #1068bf;">2b7d5ccc</a></strong>
<div>
<span> by Madeline Haraj </span> <i> at 2022-11-14T22:44:17+00:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Implement UNPACK support for sum types.
This is based on osa's unpack_sums PR from ages past.
The meat of the patch is implemented in dataConArgUnpackSum
and described in Note [UNPACK for sum types].
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/78f7ecb053340388236300e7e8d458a1a5a42344" style="color: #1068bf;">78f7ecb0</a></strong>
<div>
<span> by Andreas Klebinger </span> <i> at 2022-11-14T22:20:29-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Expand on the need to clone local binders.
Fixes #22402.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/65ce43cc647109fb18c8703563cf25fc8cf103fc" style="color: #1068bf;">65ce43cc</a></strong>
<div>
<span> by Krzysztof Gogolewski </span> <i> at 2022-11-14T22:21:05-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Fix :i Constraint printing "type Constraint = Constraint"
Since Constraint became a synonym for CONSTRAINT 'LiftedRep,
we need the same code for handling printing as for the synonym
Type = TYPE 'LiftedRep.
This addresses the same bug as #18594, so I'm reusing the test.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/94549f8fd6b40072a58125cffd21e387e709dd9c" style="color: #1068bf;">94549f8f</a></strong>
<div>
<span> by ARATA Mizuki </span> <i> at 2022-11-15T21:36:03-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>configure: Don't check for an unsupported version of LLVM
The upper bound is not inclusive.
Fixes #22449
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/02d3511b8d248ea9429512830f8f17b31688a6a6" style="color: #1068bf;">02d3511b</a></strong>
<div>
<span> by Bodigrim </span> <i> at 2022-11-15T21:36:41-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Fix capitalization in haddock for TestEquality
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/08bf28819b78e740550a73a90eda62cce8d21c90" style="color: #1068bf;">08bf2881</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2022-11-16T09:16:29+00:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>base: make Foreign.Marshal.Pool use RTS internal arena for allocation
`Foreign.Marshal.Pool` used to call `malloc` once for each allocation
request. Each `Pool` maintained a list of allocated pointers, and
traverses the list to `free` each one of those pointers. The extra O(n)
overhead is apparently bad for a `Pool` that serves a lot of small
allocation requests.
This patch uses the RTS internal arena to implement `Pool`, with these
benefits:
- Gets rid of the extra O(n) overhead.
- The RTS arena is simply a bump allocator backed by the block
allocator, each allocation request is likely faster than a libc
`malloc` call.
Closes #14762 #18338.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/37cfe3c0f4fb16189bbe3bb735f758cd6e3d9157" style="color: #1068bf;">37cfe3c0</a></strong>
<div>
<span> by Krzysztof Gogolewski </span> <i> at 2022-11-16T14:50:06-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Misc cleanup
* Replace catMaybes . map f with mapMaybe f
* Use concatFS to concatenate multiple FastStrings
* Fix documentation of -exclude-module
* Cleanup getIgnoreCount in GHCi.UI
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b0ac38133767a8ca7de63112f39436241ff435a0" style="color: #1068bf;">b0ac3813</a></strong>
<div>
<span> by Lawton Nichols </span> <i> at 2022-11-19T03:22:14-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Give better errors for code corrupted by Unicode smart quotes (#21843)
Previously, we emitted a generic and potentially confusing error during lexical
analysis on programs containing smart quotes (“/”/‘/’). This commit adds
smart quote-aware lexer errors.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/cb8430f8133dc7e6375ae7aa5a282986f3ddac69" style="color: #1068bf;">cb8430f8</a></strong>
<div>
<span> by Sebastian Graf </span> <i> at 2022-11-19T03:22:49-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Make OpaqueNo* tests less noisy to unrelated changes
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b1a8af691763fa4620bc7974012c3986569e1e05" style="color: #1068bf;">b1a8af69</a></strong>
<div>
<span> by Sebastian Graf </span> <i> at 2022-11-19T03:22:49-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Simplifier: Consider `seq` as a `BoringCtxt` (#22317)
See `Note [Seq is boring]` for the rationale.
Fixes #22317.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9fd11585eb475a45267a86256a239b9b42eebd4e" style="color: #1068bf;">9fd11585</a></strong>
<div>
<span> by Sebastian Graf </span> <i> at 2022-11-19T03:22:49-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Make T21839c's ghc/max threshold more forgiving
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4b6251ab421add0f2ac476673e5e7f6291d1539f" style="color: #1068bf;">4b6251ab</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2022-11-19T03:23:24-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Be more careful when reporting unbound RULE binders
See Note [Variables unbound on the LHS] in GHC.HsToCore.Binds.
Fixes #22471.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e8f2b80da6429af05d5e8ef1a0937aae8c22f819" style="color: #1068bf;">e8f2b80d</a></strong>
<div>
<span> by Peter Trommler </span> <i> at 2022-11-19T03:23:59-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>PPC NCG: Fix generating assembler code
Fixes #22479
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f2f9ef07f1491b72e96b5d1ba88284dee37a1d8f" style="color: #1068bf;">f2f9ef07</a></strong>
<div>
<span> by Bodigrim </span> <i> at 2022-11-20T18:39:30-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Extend documentation for Data.IORef
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ef511b235f10101f9923e3f098eeeb6a03a734d8" style="color: #1068bf;">ef511b23</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2022-11-20T18:40:05-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Buglet in GHC.Tc.Module.checkBootTyCon
This lurking bug used the wrong function to compare two
types in GHC.Tc.Module.checkBootTyCon
It's hard to trigger the bug, which only came up during
!9343, so there's no regression test in this MR.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/451aeac3b07f171f148995717d0d9a1eefe08f0e" style="color: #1068bf;">451aeac3</a></strong>
<div>
<span> by Bodigrim </span> <i> at 2022-11-20T18:40:44-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Add since pragmas for c_interruptible_open and hostIsThreaded
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4050dde898a206582bd7459265a6ff9868080c34" style="color: #1068bf;">4050dde8</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2022-11-21T11:10:50+00:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Improve the Lint checking for empty cases
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/204774e3fcee55df79d7a92398dc4b8ccce5fee1" style="color: #1068bf;">204774e3</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2022-11-21T11:12:20+00:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Wibble
</pre>
</li>
</ul>
<h4 style="margin-top: 10px; margin-bottom: 10px;">
20 changed files:
</h4>
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<li class="file-stats">
<a href="#d0d96a6d03668aeab20ebe05e2c4ccb798c7e64c" style="color: #1068bf;">
compiler/GHC.hs
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<a href="#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77" style="color: #1068bf;">
compiler/GHC/Builtin/Names.hs
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<a href="#a1519b7fe8a0d4b42e4aaa927fb6ab5b5da0fcdd" style="color: #1068bf;">
compiler/GHC/Builtin/PrimOps.hs
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<a href="#377cfd14c1f92357465df995ec6537b074051322" style="color: #1068bf;">
compiler/GHC/Builtin/Types.hs
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<a href="#be7a5c9dc04ecfe7bedb2a2afcc2a51be6719577" style="color: #1068bf;">
compiler/GHC/Builtin/Types.hs-boot
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<a href="#02362b473a022fb921814e97a6beba08107d38b1" style="color: #1068bf;">
compiler/GHC/Builtin/Types/Literals.hs
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compiler/GHC/Builtin/Types/Prim.hs
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compiler/GHC/Builtin/Types/Prim.hs-boot
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<a href="#8dc7109003a77f8a82e987dc1de31466aa956174" style="color: #1068bf;">
compiler/GHC/Builtin/Uniques.hs
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<a href="#5c66928780aaad0eb5888511dc4b0b08492c69fa" style="color: #1068bf;">
compiler/GHC/ByteCode/Types.hs
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compiler/GHC/Cmm/CLabel.hs
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<a href="#ca3b9351fcc30af1bab95f790c2300efbb7b4e1e" style="color: #1068bf;">
compiler/GHC/Cmm/CLabel.hs-boot
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<a href="#92b713d88390e6ea489e24b6cff8a3960384c0d0" style="color: #1068bf;">
compiler/GHC/Cmm/DebugBlock.hs
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compiler/GHC/Cmm/Reg.hs
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compiler/GHC/CmmToAsm.hs
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compiler/GHC/CmmToAsm/AArch64.hs
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<a href="#0c06b80d12937afa0db5ee9903e4d2be2f146d29" style="color: #1068bf;">
compiler/GHC/CmmToAsm/AArch64/Ppr.hs
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compiler/GHC/CmmToAsm/BlockLayout.hs
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compiler/GHC/CmmToAsm/Dwarf.hs
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compiler/GHC/CmmToAsm/Dwarf/Constants.hs
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The diff was not included because it is too large.
</h5>
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