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<h3>
Sven Tennie pushed to branch wip/stack_cloning
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/667d63558a694e12974ace723b553950f6080365">667d6355</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-09-23T20:43:48-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Refactor CLabel pretty-printing
* Don't depend on the selected backend to know if we print Asm or C
labels: we already have PprStyle to determine this. Moreover even when
a native backend is used (NCG, LLVM) we may want to C headers
containing pretty-printed labels, so it wasn't a good predicate
anyway.
* Make pretty-printing code clearer and avoid partiality
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a584366b1d363039247f73f6dcdd3514994ad600">a584366b</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-09-23T20:43:48-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove sdocWithDynFlags (fix #10143)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a997fa01d907fc1992dc8c3ebc73f98e7a1486f7">a997fa01</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-09-23T20:43:48-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Preliminary work towards removing DynFlags -> Driver.Ppr dependency
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/31fea307499009977fdf3dadedc98cfef986077a">31fea307</a></strong>
<div>
<span>by Hécate</span>
<i>at 2020-09-23T20:44:24-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove redundant "do", "return" and language extensions from base
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/04d6433158d95658684cf419c4ba5725d2aa539e">04d64331</a></strong>
<div>
<span>by syd@cs-syd.eu</span>
<i>at 2020-09-24T13:15:54-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Update Lock.hs with more documentation to make sure that the Boolean return value is clear.
[skip ci]
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/97cff9190d346c3b51c32c88fd145fcf1e6678f1">97cff919</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-09-24T13:16:32-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Implement Quick Look impredicativity
This patch implements Quick Look impredicativity (#18126), sticking
very closely to the design in
A quick look at impredicativity, Serrano et al, ICFP 2020
The main change is that a big chunk of GHC.Tc.Gen.Expr has been
extracted to two new modules
GHC.Tc.Gen.App
GHC.Tc.Gen.Head
which deal with typechecking n-ary applications, and the head of
such applications, respectively. Both contain a good deal of
documentation.
Three other loosely-related changes are in this patch:
* I implemented (partly by accident) points (2,3)) of the accepted GHC
proposal "Clean up printing of foralls", namely
https://github.com/ghc-proposals/ghc-proposals/blob/
master/proposals/0179-printing-foralls.rst
(see #16320).
In particular, see Note [TcRnExprMode] in GHC.Tc.Module
- :type instantiates /inferred/, but not /specified/, quantifiers
- :type +d instantiates /all/ quantifiers
- :type +v is killed off
That completes the implementation of the proposal,
since point (1) was done in
commit df08468113ab46832b7ac0a7311b608d1b418c4d
Author: Krzysztof Gogolewski <krzysztof.gogolewski@tweag.io>
Date: Mon Feb 3 21:17:11 2020 +0100
Always display inferred variables using braces
* HsRecFld (which the renamer introduces for record field selectors),
is now preserved by the typechecker, rather than being rewritten
back to HsVar. This is more uniform, and turned out to be more
convenient in the new scheme of things.
* The GHCi debugger uses a non-standard unification that allows the
unification variables to unify with polytypes. We used to hack
this by using ImpredicativeTypes, but that doesn't work anymore
so I introduces RuntimeUnkTv. See Note [RuntimeUnkTv] in
GHC.Runtime.Heap.Inspect
Updates haddock submodule.
WARNING: this patch won't validate on its own. It was too
hard to fully disentangle it from the following patch, on
type errors and kind generalisation.
Changes to tests
* Fixes #9730 (test added)
* Fixes #7026 (test added)
* Fixes most of #8808, except function `g2'` which uses a
section (which doesn't play with QL yet -- see #18126)
Test added
* Fixes #1330. NB Church1.hs subsumes Church2.hs, which is now deleted
* Fixes #17332 (test added)
* Fixes #4295
* This patch makes typecheck/should_run/T7861 fail.
But that turns out to be a pre-existing bug: #18467.
So I have just made T7861 into expect_broken(18467)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9fa26aa16f9eee0b56b5d9e65c16367d7b789996">9fa26aa1</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-09-24T13:16:32-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Improve kind generalisation, error messages
This patch does two things:
* It refactors GHC.Tc.Errors a bit. In debugging Quick Look I was
forced to look in detail at error messages, and ended up doing a bit
of refactoring, esp in mkTyVarEqErr'. It's still quite a mess, but
a bit better, I think.
* It makes a significant improvement to the kind checking of type and
class declarations. Specifically, we now ensure that if kind
checking fails with an unsolved constraint, all the skolems are in
scope. That wasn't the case before, which led to some obscure error
messages; and occasional failures with "no skolem info" (eg #16245).
Both of these, and the main Quick Look patch itself, affect a /lot/ of
error messages, as you can see from the number of files changed. I've
checked them all; I think they are as good or better than before.
Smaller things
* I documented the various instances of VarBndr better.
See Note [The VarBndr tyep and its uses] in GHC.Types.Var
* Renamed GHC.Tc.Solver.simpl_top to simplifyTopWanteds
* A bit of refactoring in bindExplicitTKTele, to avoid the
footwork with Either. Simpler now.
* Move promoteTyVar from GHC.Tc.Solver to GHC.Tc.Utils.TcMType
Fixes #16245 (comment 211369), memorialised as
typecheck/polykinds/T16245a
Also fixes the three bugs in #18640
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6d0ce0eb772bf69c57e14f30c16c606ab5035816">6d0ce0eb</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-09-24T13:17:07-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">PmCheck: Desugar string literal patterns with -XRebindableSyntax correctly (#18708)
Fixes #18708.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/007940d2fa1ac4f8046989d4af1d088914612a78">007940d2</a></strong>
<div>
<span>by Hécate</span>
<i>at 2020-09-24T13:17:44-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Namespace the Hadrian linting rule for base
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5b72718953c289b6827e877e14d9f0f3f5c64267">5b727189</a></strong>
<div>
<span>by Andreas Klebinger</span>
<i>at 2020-09-25T21:10:20-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Make sizeExpr strict in the size threshold to facilitate WW.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dd6640316865d84075b00013b8b97076705e5c44">dd664031</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-09-25T21:10:56-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">ci.sh: Factor out common utilities
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5b78e8658c3f5042967cbe9d30a5a630946c4fd7">5b78e865</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-09-25T21:10:56-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">ci: Add ad-hoc performance testing rule
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/29885f076219d878d2c976e78b7960a1a5938a96">29885f07</a></strong>
<div>
<span>by Zubin Duggal</span>
<i>at 2020-09-25T21:11:32-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Stop removing definitions of record fields in GHC.Iface.Ext.Ast
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0d6519d9e8604d067f4a4f760e4bc3403727a498">0d6519d9</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-09-25T21:12:08-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">gitlab-ci: Drop Darwin cleanup job
We now have a proper periodic clean-up script installed on the runners.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/277d20af1ce54c7e2c76dfe3b96c54babceeea41">277d20af</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-09-25T21:12:44-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add regression tests for #18371
They have been fixed by !3959, I believe.
Fixes #18371.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8edf60562720b91613a6ad6b949ae08416f81c9a">8edf6056</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-09-25T21:12:44-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add a regression test for #18609
The egregious performance hits are gone since !4050.
So we fix #18609.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4a1b89a40d553213c9722207608a07f8a4c07545">4a1b89a4</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-09-25T21:12:44-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Accept new test output for #17218
The expected test output was plain wrong.
It has been fixed for a long time.
Thus we can close #17218.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/516062366ed1957e499f27dfc6b685a073a18400">51606236</a></strong>
<div>
<span>by Sven Tennie</span>
<i>at 2020-09-25T21:13:19-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Print RET_BIG stack closures
A RET_BIG closure has a large bitmap that describes it's payload and can
be printed with printLargeBitmap().
Additionally, the output for payload closures of small and big bitmaps is
changed: printObj() is used to print a bit more information about what's
on the stack.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/2707c4eae4cf99e6da2709e128f560d91e468357">2707c4ea</a></strong>
<div>
<span>by Arnaud Spiwack</span>
<i>at 2020-09-25T21:13:58-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Pattern guards BindStmt always use multiplicity Many
Fixes #18439 .
The rhs of the pattern guard was consumed with multiplicity one, while
the pattern assumed it was Many. We use Many everywhere instead.
This is behaviour consistent with that of `case` expression. See #18738.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/92daad241bf136a10346ecbf520d62921c82bf7d">92daad24</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-09-25T21:14:36-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bignum: refactor backend modules
* move backends into GHC.Num.Backend.*
* split backend selection into GHC.Num.Backend and
GHC.Num.Backend.Selected to avoid duplication with the Check backend
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/04bc50b3c8e40387a0d0f090ea23cd68923f1834">04bc50b3</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-09-25T21:14:36-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bignum: implement extended GCD (#18427)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6a7dae4badcea5b3519005cf4e5fbf15f7e5df59">6a7dae4b</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-09-25T21:15:14-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix typed holes causing linearity errors (#18491)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/83407ffc7acc00cc025b9f6ed063add9ab9f9bcc">83407ffc</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-09-25T21:15:53-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Various documentation fixes
* Remove UnliftedFFITypes from conf. Some time ago, this extension
was undocumented and we had to silence a warning.
This is no longer needed.
* Use r'' in conf.py. This fixes a Sphinx warning:
WARNING: Support for evaluating Python 2 syntax is deprecated and will be removed in Sphinx 4.0. Convert docs/users_guide/conf.py to Python 3 syntax.
* Mark GHCForeignImportPrim as documented
* Fix formatting in template_haskell.rst
* Remove 'recursive do' from the list of unsupported items in TH
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/af1e84e794591e09e20c661fa1d3df59f5b56e4a">af1e84e7</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-09-26T05:36:46-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">PmCheck: Big refactor of module structure
* Move everything from `GHC.HsToCore.PmCheck.*` to
`GHC.HsToCore.Pmc.*` in analogy to `GHC.Tc`, rename exported
`covCheck*` functions to `pmc*`
* Rename `Pmc.Oracle` to `Pmc.Solver`
* Split off the LYG desugaring and checking steps into their own
modules (`Pmc.Desugar` and `Pmc.Check` respectively)
* Split off a `Pmc.Utils` module with stuff shared by
`Pmc.{,Desugar,Check,Solver}`
* Move `Pmc.Types` to `Pmc.Solver.Types`, add a new `Pmc.Types` module
with all the LYG types, which form the interfaces between
`Pmc.{Desugar,Check,Solver,}`.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f08f98e821bc4b755a7b6ad3bad39ce1099c5405">f08f98e8</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-09-26T05:36:46-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Extract SharedIdEnv into its own module
It's now named `GHC.Types.Unique.SDFM.UniqSDFM`.
The implementation is more clear about its stated goals and supported
operations.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/1cde295c543e209c3b81256b50e77f3c5132a4ad">1cde295c</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-09-26T05:37:23-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bignum: add bigNatFromWordArray
Reimplementation of integer-gmp's byteArrayToBigNat#
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/bda55fa0444310079ab89f2d28ddb8982975b646">bda55fa0</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-09-26T13:18:22-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Make 'undefined x' linear in 'x' (#18731)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/160fba4aa306c0649c72a6dcd7c98d9782a0e74b">160fba4a</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-09-26T13:19:00-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Disallow linear types in FFI (#18472)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e124f2a7d9a5932a4c2383fd3f9dd772b2059885">e124f2a7</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-09-26T13:19:36-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix handling of function coercions (#18747)
This was broken when we added multiplicity to the function type.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7ff433824ea4d265fca09de9c26f3fd77a34bb22">7ff43382</a></strong>
<div>
<span>by Vladislav Zavialov</span>
<i>at 2020-09-27T03:01:31+03:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Comments: change outdated reference to mergeOps
As of 686e06c59c3aa6b66895e8a501c7afb019b09e36,
GHC.Parser.PostProcess.mergeOps no longer exists.
[ci skip]
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4edf5527dbdd9781260e8822cb11a3f758fc7e91">4edf5527</a></strong>
<div>
<span>by Vladislav Zavialov</span>
<i>at 2020-09-27T10:04:12-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Don't rearrange (->) in the renamer
The parser produces an AST where the (->)
is already associated correctly:
1. (->) has the least possible precedence
2. (->) is right-associative
Thus we don't need to handle it in mkHsOpTyRn.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ce159ba58ca7e8946b46e19b1361588b677a26">a9ce159b</a></strong>
<div>
<span>by Vladislav Zavialov</span>
<i>at 2020-09-27T10:04:12-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove outdated comment in rnHsTyKi
This comment dates back to 3df40b7b78044206bbcffe3e2c0a57d901baf5e8
and does not seem relevant anymore.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/583a2070f1ad9162a365b034b27c3b80daafb8df">583a2070</a></strong>
<div>
<span>by Richard Eisenberg</span>
<i>at 2020-09-29T00:31:27-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Optimize NthCo (FunCo ...) in coercion opt
We were missing this case previously.
Close #18528.
Metric Decrease:
T18223
T5321Fun
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b31a3360e2ef12f3ec7eaf66b3600247c1eb36c3">b31a3360</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-09-29T00:32:05-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Linear types: fix kind inference when checking datacons
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5830a12c46e7227c276a8a71213057595ee4fc04">5830a12c</a></strong>
<div>
<span>by Vladislav Zavialov</span>
<i>at 2020-09-29T00:32:05-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">New linear types syntax: a %p -> b (#18459)
Implements GHC Proposal #356
Updates the haddock submodule.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/bca4d36dd835c1c31c8f3364113586e1aedc6787">bca4d36d</a></strong>
<div>
<span>by Vladislav Zavialov</span>
<i>at 2020-09-29T00:32:05-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Improve error messages for (a %m) without LinearTypes
Detect when the user forgets to enable the LinearTypes
extension and produce a better error message.
Steals the (a %m) syntax from TypeOperators, the workaround
is to write (a % m) instead.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b9635d0a9bbb7f659c376b68cdc87223c864243c">b9635d0a</a></strong>
<div>
<span>by Benjamin Maurer</span>
<i>at 2020-09-29T00:32:43-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Description of flag `-H` was in 'verbosity options', moved to 'misc'.
Fixes #18699
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/74c797f6b72c4d01f5e0092dfac1461f3f3dd7a2">74c797f6</a></strong>
<div>
<span>by Benjamin Maurer</span>
<i>at 2020-09-29T00:33:20-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Workaround for #18623: GHC crashes bc. under rlimit for vmem it will reserve
_all_ of it, leaving nothing for, e.g., thread stacks.
Fix will only allocate 2/3rds and check whether remainder is at least large
enough for minimum amount of thread stacks.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4365d77a0b306ada61654c3648b844cfa0f4fdcf">4365d77a</a></strong>
<div>
<span>by Ryan Scott</span>
<i>at 2020-09-29T00:33:57-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add regression test #18501
ghc/ghc!3220 ended up fixing #18501. This patch adds a regression
test for #18501 to ensure that it stays fixed.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8e3f00dd24936b6674d0a2322f8410125968583e">8e3f00dd</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-09-29T17:24:03+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Make the parser module less dependent on DynFlags
Bump haddock submodule
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ab0d8f77ec67676de40ebe6ff7e86756e5c761e">3ab0d8f7</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-09-30T02:48:27-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">PmCheck: Long-distance information for LocalBinds (#18626)
Now `desugarLocalBind` (formerly `desugarLet`) reasons about
* `FunBind`s that
* Have no pattern matches (so which aren't functions)
* Have a singleton match group with a single GRHS
* (which may have guards)
* and looks through trivial post-typechecking `AbsBinds` in doing so
to pick up the introduced renamings.
And desugars to `PmLet` LYG-style guards. Since GRHSs are no longer
denoted simply by `NonEmpty PmGRHS`, but also need to carry a `[PmGrd]`
for the `PmLet`s from `LocalBind`s, I added `PmGRHSs` to capture that.
Since we call out to the desugarer more often, I found that there were
superfluous warnings emitted when desugaring e.g. case expressions.
Thus, I made sure that we deactivate any warnings in the LYG desugaring
steps by the new wrapper function `noCheckDs`.
There's a regression test in `T18626`. Fixes #18626.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f8f60efc831c6adb5bfee8449b76238ba6d582db">f8f60efc</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-09-30T02:49:03-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Mark T12971 as broken on Windows
Due to #17945.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6527fc57b8e099703f5bdb5ec7f1dfd421651972">6527fc57</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-09-30T02:49:03-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bump Cabal, hsc2hs, directory, process submodules
Necessary for recent Win32 bump.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/df3f58807580bc2762086e063e3823b05de6fd64">df3f5880</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-09-30T02:49:41-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove unsafeGlobalDynFlags (#17957, #14597)
There are still global variables but only 3 booleans instead of a single
DynFlags.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9befd94d79a78fd53a28a4ce051a91d2215d069c">9befd94d</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-09-30T02:49:41-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove unused global variables
Some removed globals variables were still declared in the RTS.
They were removed in the following commits:
* 4fc6524a2a4a0003495a96c8b84783286f65c198
* 0dc7985663efa1739aafb480759e2e2e7fca2a36
* bbd3c399939311ec3e308721ab87ca6b9443f358
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7c98699f685d8c53fd594b6de22b425ed951174f">7c98699f</a></strong>
<div>
<span>by Richard Eisenberg</span>
<i>at 2020-09-30T02:50:17-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Omit redundant kind equality check in solver
See updated Note [Use loose types in inert set] in
GHC.Tc.Solver.Monad.
Close #18753.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/395498260ab444f5e1ec82d716bea3cc3ad887f7">39549826</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-09-30T02:50:54-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Pmc: Don't call exprType on type arguments (#18767)
Fixes #18767.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/235e410f63a4725bbc4466dbdef7d5f661793e84">235e410f</a></strong>
<div>
<span>by Richard Eisenberg</span>
<i>at 2020-09-30T02:51:29-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Regression test for #10709.
Close #10709
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5c32655fffd0d8862f3ba693351f1e612daa0b6b">5c32655f</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-09-30T22:31:55-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">hadrian/doc: Clarify documentation of key-value configuration</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0bb02873eeeca41a64d26becb9057e988f444acd">0bb02873</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-01T18:34:53-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add test for T18574
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e393f213f5ccff4fd6034d5294e51aa5a2720890">e393f213</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-01T18:34:53-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Allow fusion with catMaybes (#18574)
Metric Decrease:
T18574
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d2cfad96831edbe50aeddaefc1a3b0fb0dd73bc2">d2cfad96</a></strong>
<div>
<span>by Fendor</span>
<i>at 2020-10-01T18:35:33-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add mainModuleNameIs and demote mainModIs
Add `mainModuleNameIs` to DynFlags and demote
`mainModIs` to function which uses the homeUnit from DynFlags
it is created from.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fc351ab8fbf02eaf473e97b3ce8c4cddcba3a8a5">fc351ab8</a></strong>
<div>
<span>by Fendor</span>
<i>at 2020-10-01T18:35:33-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Use HomeUnit for main module without module declaration
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dca1cb22cab4fa7f5937e9ffdc0ee32313dbd01c">dca1cb22</a></strong>
<div>
<span>by Fendor</span>
<i>at 2020-10-01T18:35:33-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove mAIN completely
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a5aaceecaa04ce7ea5bade6eb96c0d129109c15a">a5aaceec</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-01T18:36:11-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Use ADTs for parser errors/warnings
Haskell and Cmm parsers/lexers now report errors and warnings using ADTs
defined in GHC.Parser.Errors. They can be printed using functions in
GHC.Parser.Errors.Ppr.
Some of the errors provide hints with a separate ADT (e.g. to suggest to
turn on some extension). For now, however, hints are not consistent
across all messages. For example some errors contain the hints in the
main message. I didn't want to change any message with this patch. I
expect these changes to be discussed and implemented later.
Surprisingly, this patch enhances performance. On CI
(x86_64/deb9/hadrian, ghc/alloc):
parsing001 -11.5%
T13719 -2.7%
MultiLayerModules -3.5%
Naperian -3.1%
Bump haddock submodule
Metric Decrease:
MultiLayerModules
Naperian
T13719
parsing001
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a946c7ef9eec768878d261c20437b924cd3afda3">a946c7ef</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-01T18:36:11-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Less DynFlags in Header parsing
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dafe79433c2ca884da3677194ee38913ee30e8dc">dafe7943</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-01T18:36:11-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Parser: remove some unused imports
These are not reported by GHC because Happy adds {-# OPTIONS_GHC -w #-}
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/93d5de165a81dfb335bf1646c2e29956f5ab55ea">93d5de16</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-01T18:36:11-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Don't import GHC.Unit to reduce the number of dependencies
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e3655f810b4eba1fb7d81a3227a08dae8b85dfc4">e3655f81</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-10-01T18:36:47-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Don't attach CPR signatures to NOINLINE data structures (#18154)
Because the generated `KindRep`s don't have an unfolding, !3230 did not
actually stop to compute, attach and serialise unnecessary CPR
signatures for them. As already said in
`Note [CPR for data structures]`, that leads to bloated interface
files which is ultimately quadratic for Nested CPR.
So we don't attach any CPR signature to bindings that
* Are not thunks (because thunks are not in WHNF)
* Have arity 0 (which means the top-level constructor is not a lambda)
If the data structure has an unfolding, we continue to look through it.
If not (as is the case for `KindRep`s), we look at the unchanged CPR
signature and see `topCprType`, as expected.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ba5965eb10967d21b992aac925fb772db2ddde12">ba5965eb</a></strong>
<div>
<span>by Richard Eisenberg</span>
<i>at 2020-10-01T18:37:23-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add regression test for #18755.
Close #18755
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a8018c17747342444c67eeec21a506c89c1110e8">a8018c17</a></strong>
<div>
<span>by Vladislav Zavialov</span>
<i>at 2020-10-01T18:37:58-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix pretty-printing of the mult-polymorphic arrow
A follow-up to !4020 (5830a12c46e7227c276a8a71213057595ee4fc04)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e5523324d2c55e0091857e21bf5613b5f6b442a7">e5523324</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-01T18:38:35-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bignum: add integerNegate RULE
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/1edd6d21c0abea34b498a627234a97df21648024">1edd6d21</a></strong>
<div>
<span>by Vladislav Zavialov</span>
<i>at 2020-10-01T18:39:10-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Refactor: remove rnHsDoc
It did not do any useful work.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890">a9ae83af</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-10-02T08:00:25-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix typos in comments
[skip ci]
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b81350bb925f8cb309355ee46238dbc11b796faf">b81350bb</a></strong>
<div>
<span>by Icelandjack</span>
<i>at 2020-10-02T08:01:01-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Replaced MkT1 with T1 in type signatures.</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3c9beab75aaa5fbbb11132c99e2af114f322152f">3c9beab7</a></strong>
<div>
<span>by Vladislav Zavialov</span>
<i>at 2020-10-02T13:51:58-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Minor TTG clean-up: comments, unused families, bottom
1. Fix and update section headers in GHC/Hs/Extension.hs
2. Delete the unused 'XCoreAnn' and 'XTickPragma' families
3. Avoid calls to 'panic' in 'pprStmt'
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/12c06927a03a2fdb516f7008c57d68568b02b576">12c06927</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-02T13:52:38-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bignum: implement integerRecipMod (#18427)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8dd4f40512bb18e296280acde0507b4233a27b69">8dd4f405</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-02T13:52:38-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bignum: implement integerPowMod (#18427)
Incidentally fix powModInteger which was crashing in integer-gmp for
negative exponents when the modular multiplicative inverse for the base
didn't exist. Now we compute it explicitly with integerRecipMod so that
every backend returns the same result without crashing.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/1033a720abf4a23a30c5cb0dfcb18b2bae3acc68">1033a720</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-10-02T13:53:23-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Reject linearity in kinds in checkValidType (#18780)
Patch taken from https://gitlab.haskell.org/ghc/ghc/-/issues/18624#note_300673
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b0ccba66c4d7c16eba7e2fdc1857fc0f63cd33f9">b0ccba66</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-10-03T19:33:02-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Small documentation fixes
- Fix formatting of code blocks and a few sphinx warnings
- Move the Void# change to 9.2, it was done right after the branch was cut
- Fix typo in linear types documentation
- Note that -Wincomplete-uni-patterns affects lazy patterns
[skip ci]
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/70dc2f09a33a4c3f485d8b63e92a21955643a0b7">70dc2f09</a></strong>
<div>
<span>by Karel Gardas</span>
<i>at 2020-10-03T19:33:06-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">fix rts.cabal to use real arch names and not aliasses (fixes #18654)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/bc5de347bccd7a2691a9e4b927ab80acb7e15991">bc5de347</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-10-05T13:59:24-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Inline `integerDecodeDouble#` and constant-fold `decodeDouble_Int64#` instead
Currently, `integerDecodeDouble#` is known-key so that it can be
recognised in constant folding. But that is very brittle and doesn't
survive worker/wrapper, which we even do for
`NOINLINE` things since #13143.
Also it is a trade-off: The implementation of `integerDecodeDouble#`
allocates an `Integer` box that never cancels aways if we don't inline
it.
Hence we recognise the `decodeDouble_Int64#` primop instead in constant
folding, so that we can inline `integerDecodeDouble#`. As a result,
`integerDecodeDouble#` no longer needs to be known-key.
While doing so, I realised that we don't constant-fold
`decodeFloat_Int#` either, so I also added a RULE for it.
`integerDecodeDouble` is dead, so I deleted it.
Part of #18092. This improves the 32-bit `realToFrac`/`toRational`:
Metric Decrease:
T10359
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/802b5e6fdd6dfc58396a9dca1903dc5a1d6634ca">802b5e6f</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-10-05T13:59:33-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix linear types in TH splices (#18465)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/18a3ddf75d25094096a7fe44fd250de973041187">18a3ddf7</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-10-05T13:59:33-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">rts: Fix integer width in TICK_BUMP_BY
Previously `TICK_BUMP_BY` was defined as
```c
#define TICK_BUMP_BY(ctr,n) CLong[ctr] = CLong[ctr] + n
```
Yet the tickers themselves were defined as `StgInt`s. This happened to
work out correctly on Linux, where `CLong` is 64-bits. However, it
failed on Windows, where `CLong` is 32-bits, resulting in #18782.
Fixes #18783.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5fc4243bf2da2adbae3d01d163053e8895bc52d9">5fc4243b</a></strong>
<div>
<span>by Rachel</span>
<i>at 2020-10-07T14:59:45-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Document profiling flags, warning flags, and no-pie
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b41f7c3814b2e0e765311babc851cd3d9b6a78d8">b41f7c38</a></strong>
<div>
<span>by Andreas Klebinger</span>
<i>at 2020-10-07T15:00:20-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">WinIO: Small changes related to atomic request swaps.
Move the atomix exchange over the Ptr type to an internal module.
Fix a bug caused by us passing ptr-to-ptr instead of ptr to
atomic exchange.
Renamed interlockedExchange to exchangePtr.
I've also added an cas primitive. It turned out we don't need it
for WinIO but I'm leaving it in as it's useful for other things.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/948a14e1eaaf0c033e3f19d1b9eecb398ddc8661">948a14e1</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-10-07T15:00:55-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">gitlab-ci: Fix name of Ubuntu 20.04 image</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/74d4017b744585a89709ac4b74dbe37b44741464">74d4017b</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-07T15:01:35-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix -flink-rts (#18651)
Before this patch -flink-rts could link with GHC's rts instead of the
selected one.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0e8b923d3c8a5ff415091b92c4c7b7e1e33d0ae6">0e8b923d</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-07T15:01:35-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Apply suggestion to compiler/GHC/SysTools.hs</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d6dff830754a97220eacf032c32cd54b18654917">d6dff830</a></strong>
<div>
<span>by Alan Zimmerman</span>
<i>at 2020-10-07T15:02:10-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Preserve as-parsed arrow type for HsUnrestrictedArrow
When linear types are disabled, HsUnrestrictedArrow is treated as
HslinearArrow.
Move this adjustment into the type checking phase, so that the parsed
source accurately represents the source as parsed.
Closes #18791
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/030c5ce0a58e212eb7b973e1206b775085b74afb">030c5ce0</a></strong>
<div>
<span>by Karel Gardas</span>
<i>at 2020-10-07T15:02:48-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">hadrian: use stage0 linker to merge objects when done during the stage0
Fixes #18800.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a94db588db5e2983112301e94b2133b5a3f03875">a94db588</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-10-07T15:03:23-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Allow whitespace before "Metric (in|de)crease"
Several people have struggled with metric change annotations
in their commit messages not being recognized due to the fact that
GitLab's job log inserts a space at the beginning of each line. Teach
the regular expression to accept this whitespace.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e91ddddd714b22df2569681fb033fbb151ec7e6b">e91ddddd</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-10-07T15:04:07-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Misc cleanup
* Include funTyCon in exposedPrimTyCons.
Every single place using exposedPrimTyCons was adding funTyCon
manually.
* Remove unused synTyConResKind and ieLWrappedName
* Add recordSelectorTyCon_maybe
* In exprType, panic instead of giving a trace message and dummy output.
This prevents #18767 reoccurring.
* Fix compilation error in fragile concprog001 test (part of #18732)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/386c2d7ff80843051ad15eab5de3766430ee98a5">386c2d7f</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-09T08:40:33-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Use UnitId in the backend instead of Unit
In Cmm we can only have real units identified with an UnitId. Other
units (on-the-fly instantiated units and holes) are only used in
type-checking backpack sessions that don't produce Cmm.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a566c83d4fc3a90b209b33131a2972ea53ec81b2">a566c83d</a></strong>
<div>
<span>by Simon Jakobi</span>
<i>at 2020-10-09T08:41:09-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Update containers to v0.6.4.1
Updates containers submodule.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fd984d68e5ec4b04bc79395c099434e653eb1060">fd984d68</a></strong>
<div>
<span>by Tamar Christina</span>
<i>at 2020-10-09T08:41:50-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">rts: fix race condition in StgCRun
On windows the stack has to be allocated 4k at a time, otherwise we get
a segfault. This is done by using a helper ___chkstk_ms that is provided
by libgcc. The Haskell side already knows how to handle this but we need
to do the same from STG. Previously we would drop the stack in StgRun
but would only make it valid whenever the scheduler loop ran.
This approach was fundamentally broken in that it falls apart when you
take a signal from the OS. We see it less often because you initially
get allocated a 1MB stack block which you have to blow past first.
Concretely this means we must always keep the stack valid.
Fixes #18601.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/accdb24a086b80fe74776246aa33bce5a920e3c8">accdb24a</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-09T08:42:31-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Expose RTS-only ways (#18651)
Some RTS ways are exposed via settings (ghcThreaded, ghcDebugged) but
not all. It's simpler if the RTS exposes them all itself.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d360f3438da7f6eb51e217c6697db6fb338c6fd7">d360f343</a></strong>
<div>
<span>by MaxGabriel</span>
<i>at 2020-10-09T08:43:11-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Document -Wderiving-typeable
Tracking: #18641
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e48cab2a57f2342891f985bcb44817e17e985275">e48cab2a</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-10-09T08:43:49-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add a flag to indicate that gcc supports -no-pie
Fixes #17919.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f7e2fff96975128397e2dab7d57da3c9c6b8c76b">f7e2fff9</a></strong>
<div>
<span>by Hécate</span>
<i>at 2020-10-09T08:44:26-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add linting of `base` to the CI
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/45a1d493ec877f5fa0b3228deee3e019033c89db">45a1d493</a></strong>
<div>
<span>by Andreas Klebinger</span>
<i>at 2020-10-09T08:45:05-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Use proper RTS flags when collecting residency in perf tests.
Replace options like collect_stats(['peak_megabytes_allocated'],4) with
collect_runtime_residency(4) and so forth. Reason being that the later
also supplies some default RTS arguments which make sure residency does
not fluctuate too much.
The new flags mean we get new (hopefully more accurate) baselines so
accept the stat changes.
-------------------------
Metric Decrease:
T4029
T4334
T7850
Metric Increase:
T13218
T7436
-------------------------
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ef65b1546ad01fdd10386f713fc246d49269a196">ef65b154</a></strong>
<div>
<span>by Andreas Klebinger</span>
<i>at 2020-10-09T08:45:42-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite/timeout: Fix windows specific errors.
We now seem to use -Werror there. Which caused some long standing
warnings to become errors.
I applied changes to remove the warnings allowing the testsuite to
run on windows as well.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e691a5a04692beb601d480ccf9f283199a70ed62">e691a5a0</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-09T08:46:22-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Hadrian: add quick-debug flavour
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/12191a99d3b978b697ec0fb4412276fbea5dce8f">12191a99</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-09T08:47:00-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bignum: match on small Integer/Natural
Previously we only matched on *variables* whose unfoldings were a ConApp
of the form `IS lit#` or `NS lit##`. But we forgot to match on the
ConApp directly... As a consequence, constant folding only worked after
the FloatOut pass which creates bindings for most sub-expressions. With
this patch, matching on bignums works even with -O0 (see bignumMatch
test).
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/36787bba78ae5acbb857c84b85b8feb7c83e54a5">36787bba</a></strong>
<div>
<span>by Alan Zimmerman</span>
<i>at 2020-10-09T08:47:36-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">ApiAnnotations : preserve parens in GADTs
A cleanup in 7f418acf61e accidentally discarded some parens in
ConDeclGADT.
Make sure these stay in the AST in a usable format.
Also ensure the AnnLolly does not get lost in a GADT.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/32dc7698a0c38afe2889119a2df0f2a2b8debe0a">32dc7698</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-10-09T08:48:15-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Linear types: fix roles in GADTs (#18799)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9657f6f34a1a00008a0db935dbf25733cb483cd4">9657f6f3</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-10-09T08:48:52-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">sdist: Include hadrian sources in source distribution
Previously the make build system's source distribution rules neglected
to include Hadrian's sources.
Fixes #18794.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c832f7e2a9314cfd61257cb161b1795b612d12b5">c832f7e2</a></strong>
<div>
<span>by Tamar Christina</span>
<i>at 2020-10-09T08:49:33-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">winio: fixed timeouts non-threaded.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6f0243ae5b359124936a8ff3dd0a287df3d7aca2">6f0243ae</a></strong>
<div>
<span>by Tamar Christina</span>
<i>at 2020-10-09T08:50:13-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">winio: fix array splat
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0fd3d360cab977e00fb6d90d0519962227b029bb">0fd3d360</a></strong>
<div>
<span>by Tamar Christina</span>
<i>at 2020-10-09T08:50:51-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">winio: fixed bytestring reading interface.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dfaef1cae7a4a0cb8783933274dae7f39d7165a0">dfaef1ca</a></strong>
<div>
<span>by Tamar Christina</span>
<i>at 2020-10-09T08:51:30-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">winio: fixed more data error.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/bfdccac6acce84e15292a454d12f4e0d87ef6f10">bfdccac6</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-10-09T08:52:07-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix desugaring of record updates on data families
This fixes a long-standing bug in the desugaring of record
updates for data families, when the latter involves a GADT. It's
all explained in Note [Update for GADTs] in GHC.HsToCore.Expr.
Building the correct cast is surprisingly tricky, as that Note
explains.
Fixes #18809. The test case (in indexed-types/should_compile/T18809)
contains several examples that exercise the dark corners.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e5c7c9c8578de1248826c21ebd08e475d094a552">e5c7c9c8</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-10-09T08:52:43-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bump win32-tarballs version to 0.3
This should fix #18774.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ef950b19c04bc9c41920ecc9f94382653981d4bb">ef950b19</a></strong>
<div>
<span>by Andreas Klebinger</span>
<i>at 2020-10-09T08:53:21-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add TyCon Set/Env and use them in a few places.
Firstly this improves code clarity.
But it also has performance benefits as we no longer
go through the name of the TyCon to get at it's unique.
In order to make this work the recursion check for TyCon
has been moved into it's own module in order to avoid import
cycles.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fd302e938ebf48c73d9f715d67ce8cd990f972ff">fd302e93</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-10-09T08:54:02-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add -pgmlm and -optlm flags
!3798 added documentation and semantics for the flags,
but not parsing.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/db236ffc03e5e17f71295469040da96b03ec2f87">db236ffc</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-09T08:54:41-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Testsuite: increase timeout for T18223 (#18795)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6a243e9daaa6c17c0859f47ae3a098e680aa28cf">6a243e9d</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-09T08:55:21-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Cache HomeUnit in HscEnv (#17957)
Instead of recreating the HomeUnit from the DynFlags every time we need
it, we store it in the HscEnv.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5884fd325248e75d40c9da431b4069e43a2c182c">5884fd32</a></strong>
<div>
<span>by Fendor</span>
<i>at 2020-10-09T19:46:28+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Move File Target parser to library #18596
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ea59fd4d0abe73e1127dcdd91855a39232e62d41">ea59fd4d</a></strong>
<div>
<span>by Hécate</span>
<i>at 2020-10-10T14:49:59-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Lint the compiler for extraneous LANGUAGE pragmas
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/22f218b729a751bc5e5965624a716fc542f502a5">22f218b7</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-10-10T14:50:42-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Linear types: fix quantification in GADTs (#18790)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/74ee1237bf243dd7d8b758a53695575c364c3088">74ee1237</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-10-10T14:51:20-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bignum: fix bigNatCompareWord# bug (#18813)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/274e21f02fabb4b3761841972b1074d0c0146fae">274e21f0</a></strong>
<div>
<span>by Hécate</span>
<i>at 2020-10-11T10:55:56+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove the dependency on the ghc-linters stage
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8ed649421f4d464b313b6c27ed255286fee62fd2">8ed64942</a></strong>
<div>
<span>by Sven Tennie</span>
<i>at 2020-10-11T20:13:21+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add cloneMyStack# and cloneThreadStack# primops (#18741)
This includes adding a new primtype, StackSnapshot#.
cloneThreadStack# is currently only a stub, cloneMyStack# is untested.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ca59fa89ff8a462dcc416133e39f140b9de4f830">ca59fa89</a></strong>
<div>
<span>by Sven Tennie</span>
<i>at 2020-10-11T20:13:21+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add hie.yaml for deriveConstants
This enables IDE support for this tool.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/919153d2bc75a2429ad59ef4dc62600874f2f642">919153d2</a></strong>
<div>
<span>by Sven Tennie</span>
<i>at 2020-10-11T20:13:21+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove unneccesary primop cloneThreadStack# (#18741)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/47ae646182813f50ef15bdd99e95d23f71f8b687">47ae6461</a></strong>
<div>
<span>by Sven Tennie</span>
<i>at 2020-10-11T20:13:21+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add cloneThreadStack and cloneMyStack
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9452542ab31b126c34e8c44ab110fe196179206e">9452542a</a></strong>
<div>
<span>by Sven Tennie</span>
<i>at 2020-10-11T20:13:21+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix MVar putting and implement tests
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0d14c1937daea7daf3ddfc341b9f632edd6987d6">0d14c193</a></strong>
<div>
<span>by Sven Tennie</span>
<i>at 2020-10-11T20:34:14+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add printStack
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/766dd4868a574247a6206991f9a9a0007a380448">766dd486</a></strong>
<div>
<span>by Sven Tennie</span>
<i>at 2020-10-11T20:34:14+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Rename assertion
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b3ca79d3b1df8bd33d03dea77f91415c33a13d18">b3ca79d3</a></strong>
<div>
<span>by Sven Tennie</span>
<i>at 2020-10-11T20:34:14+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Delete TODO
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/cd42fb202e8317e38668726d6a0df26308427ec9">cd42fb20</a></strong>
<div>
<span>by Sven Tennie</span>
<i>at 2020-10-11T20:34:15+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Undo Printer.h include
</pre>
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<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/745f8d2e67e6c2e7840257a09b877d02a6841ed6">745f8d2e</a></strong>
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<span>by Sven Tennie</span>
<i>at 2020-10-12T10:28:47+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix merge issue
</pre>
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<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c9c9e5547274f5e80fd886ad8bfb1f44e63866f4">c9c9e554</a></strong>
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<span>by Sven Tennie</span>
<i>at 2020-10-12T10:35:28+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix C compiler warnings
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</ul>
<h4>30 changed files:</h4>
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<a href="#587d266bb27a4dc3022bbed44dfa19849df3044c">
.gitlab-ci.yml
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<a href="#157f7634c25bc6366cb7c9c9edb48e819dce38db">
.gitlab/ci.sh
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.gitlab/common.sh
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compiler/.hlint.yaml
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<a href="#d0d96a6d03668aeab20ebe05e2c4ccb798c7e64c">
compiler/GHC.hs
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compiler/GHC/Builtin/Names.hs
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compiler/GHC/Builtin/Names/TH.hs
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compiler/GHC/Builtin/PrimOps.hs
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compiler/GHC/Builtin/Types.hs
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compiler/GHC/Builtin/Types/Prim.hs
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<a href="#d95fdf6575459444666f72b2281534e0558a4ba0">
compiler/GHC/Builtin/Utils.hs
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compiler/GHC/Builtin/primops.txt.pp
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compiler/GHC/ByteCode/Asm.hs
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compiler/GHC/ByteCode/InfoTable.hs
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compiler/GHC/ByteCode/Instr.hs
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compiler/GHC/ByteCode/Linker.hs
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compiler/GHC/ByteCode/Types.hs
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compiler/GHC/Cmm/CLabel.hs
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<a href="#04d7c9e00896d6fa6990b4873e539e9c04c268bc">
compiler/GHC/Cmm/Dataflow/Collections.hs
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<a href="#4fbb1c5f251c38fc01fcde693420ee6d02df7e45">
compiler/GHC/Cmm/Dataflow/Label.hs
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compiler/GHC/Cmm/Lexer.x
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compiler/GHC/Cmm/Monad.hs
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compiler/GHC/Cmm/Node.hs
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compiler/GHC/Cmm/Parser.y
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compiler/GHC/Cmm/Pipeline.hs
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compiler/GHC/CmmToAsm.hs
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compiler/GHC/CmmToAsm/BlockLayout.hs
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<a href="#d6e95c6ffd8955a51f59d69de7525bebd693db69">
compiler/GHC/CmmToAsm/CFG.hs
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<a href="#3008b031dfff6e38be4d7b8861e17927ee8c3fab">
compiler/GHC/CmmToAsm/Dwarf/Types.hs
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compiler/GHC/CmmToAsm/PIC.hs
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<h5>The diff was not included because it is too large.</h5>
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