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<h3>
John Ericson pushed to branch wip/int64-everywhere
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/a11c9678409b2e0a01e8aba153e094800f3641bf">a11c9678</a></strong>
<div>
<span>by Adam Sandberg Ericsson</span>
<i>at 2020-08-09T11:32:25+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">hadrian: depend on boot compiler version #18001
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c8873b52f6a16202c3cb839e988c1406b8f67cfe">c8873b52</a></strong>
<div>
<span>by Alan Zimmerman</span>
<i>at 2020-08-09T21:17:54-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Api Annotations : Adjust SrcSpans for prefix bang (!).
And prefix ~
(cherry picked from commit 8dbee2c578b1f642d45561be3f416119863e01eb)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/77398b678aba45ba25932a39b7e8a7a31d0dd6f3">77398b67</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-09T21:18:34-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Avoid allocations in `splitAtList` (#18535)
As suspected by @simonpj in #18535, avoiding allocations in
`GHC.Utils.Misc.splitAtList` when there are no leftover arguments is
beneficial for performance:
On CI validate-x86_64-linux-deb9-hadrian:
T12227 -7%
T12545 -12.3%
T5030 -10%
T9872a -2%
T9872b -2.1%
T9872c -2.5%
Metric Decrease:
T12227
T12545
T5030
T9872a
T9872b
T9872c
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8ba41a0f7f5a8eeb39b73d0f0041a53549c377ab">8ba41a0f</a></strong>
<div>
<span>by Felix Yan</span>
<i>at 2020-08-10T20:23:29-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Correct a typo in ghc.mk</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/1c4692641dcaca3e90116c28d012c506108b386f">1c469264</a></strong>
<div>
<span>by Felix Yan</span>
<i>at 2020-08-10T20:23:29-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add a closing parenthesis too
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/acf537f9fefa31883b7cb28ff61b837ab7f8a44a">acf537f9</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-10T20:24:09-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Make splitAtList strict in its arguments
Also fix its slightly wrong comment
Metric Decrease:
T5030
T12227
T12545
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ab4d15898c03a5db6741feb2028488facf032fa4">ab4d1589</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-11T22:18:03-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">typecheck: Drop SPECIALISE pragmas when there is no unfolding
Previously the desugarer would instead fall over when it realized that
there was no unfolding for an imported function with a SPECIALISE
pragma. We now rather drop the SPECIALISE pragma and throw a warning.
Fixes #18118.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0ac8c0a551619b52e0f151d6781b11dd66cf2110">0ac8c0a5</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-11T22:18:03-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Add test for #18118
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c43078d7b78b4722dd30b56674c27189d2689ffe">c43078d7</a></strong>
<div>
<span>by Sven Tennie</span>
<i>at 2020-08-11T22:18:38-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add hie.yaml to ghc-heap
This enables IDE support by haskell-language-server for ghc-heap.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f1088b3f31ceddf918a319c97557fb1f08a9a387">f1088b3f</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-11T22:19:15-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Specify metrics collected by T17516
Previously it collected everything, including "max bytes used". This is
problematic since the test makes no attempt to control for deviations in
GC timing, resulting in high variability. Fix this by only collecting
"bytes allocated".
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/accbc242e555822a2060091af7188ce6e9b0144e">accbc242</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-12T03:50:12-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">DynFlags: disentangle Outputable
- put panic related functions into GHC.Utils.Panic
- put trace related functions using DynFlags in GHC.Driver.Ppr
One step closer making Outputable fully independent of DynFlags.
Bump haddock submodule
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/db6dd810eb7986a39657f7f028f1f4de92b321dd">db6dd810</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-12T03:50:48-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Increase tolerance of T16916
T16916 (testing #16916) has been slightly fragile in CI due to its
reliance on CPU times. While it's hard to see how to eliminate
the time-dependence entirely, we can nevertheless make it more tolerant.
Fixes #16966.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/bee43aca827387aa81a64801d82adcb596d01d9a">bee43aca</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-12T20:52:50-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Rewrite and move the monad-state hack note
The note has been rewritten by @simonpj in !3851
[skip ci]
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/25fdf25eb574d6d291673603ab36ac5ec7e37066">25fdf25e</a></strong>
<div>
<span>by Alan Zimmerman</span>
<i>at 2020-08-12T20:53:26-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">ApiAnnotations: Fix parser for new GHC 9.0 features
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7831fe05021caa90d4696ca91ae2b31a82e65b3d">7831fe05</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-13T03:44:17-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">parser: Suggest ImportQualifiedPost in prepositive import warning
As suggested in #18545.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/55dec4dc6e8f8430810d212c73e78ffbb92e0a48">55dec4dc</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-08-13T03:44:52-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">PmCheck: Better long-distance info for where bindings (#18533)
Where bindings can see evidence from the pattern match of the `GRHSs`
they belong to, but not from anything in any of the guards (which belong
to one of possibly many RHSs).
Before this patch, we did *not* consider said evidence, causing #18533,
where the lack of considering type information from a case pattern match
leads to failure to resolve the vanilla COMPLETE set of a data type.
Making available that information required a medium amount of
refactoring so that `checkMatches` can return a
`[(Deltas, NonEmpty Deltas)]`; one `(Deltas, NonEmpty Deltas)` for each
`GRHSs` of the match group. The first component of the pair is the
covered set of the pattern, the second component is one covered set per
RHS.
Fixes #18533.
Regression test case: T18533
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/cf97889a38edc3314a7b61e6e0b6e6d0f434c8a2">cf97889a</a></strong>
<div>
<span>by Hécate</span>
<i>at 2020-08-13T03:45:29-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Re-add BangPatterns to CodePage.hs
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ffc0d578ea22de02a68c64c094602701e65d8895">ffc0d578</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-13T09:49:56-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add HomeUnit type
Since Backpack the "home unit" is much more involved than what it was
before (just an identifier obtained with `-this-unit-id`). Now it is
used in conjunction with `-component-id` and `-instantiated-with` to
configure module instantiations and to detect if we are type-checking an
indefinite unit or compiling a definite one.
This patch introduces a new HomeUnit datatype which is much easier to
understand. Moreover to make GHC support several packages in the same
instances, we will need to handle several HomeUnits so having a
dedicated (documented) type is helpful.
Finally in #14335 we will also need to handle the case where we have no
HomeUnit at all because we are only loading existing interfaces for
plugins which live in a different space compared to units used to
produce target code. Several functions will have to be refactored to
accept "Maybe HomeUnit" parameters instead of implicitly querying the
HomeUnit fields in DynFlags. Having a dedicated type will make this
easier.
Bump haddock submodule
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8a51b2ab7433c06bddca9699b0dfd8ab1d11879b">8a51b2ab</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-13T21:09:15-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Make IOEnv monad one-shot (#18202)
On CI (x86_64-linux-deb9-hadrian, compile_time/bytes_allocated):
T10421 -1.8% (threshold: +/- 1%)
T10421a -1.7% (threshold: +/- 1%)
T12150 -4.9% (threshold: +/- 2%)
T12227 -1.6 (threshold: +/- 1%)
T12425 -1.5% (threshold: +/- 1%)
T12545 -3.8% (threshold: +/- 1%)
T12707 -3.0% (threshold: +/- 1%)
T13035 -3.0% (threshold: +/- 1%)
T14683 -10.3% (threshold: +/- 2%)
T3064 -6.9% (threshold: +/- 2%)
T4801 -4.3% (threshold: +/- 2%)
T5030 -2.6% (threshold: +/- 2%)
T5321FD -3.6% (threshold: +/- 2%)
T5321Fun -4.6% (threshold: +/- 2%)
T5631 -19.7% (threshold: +/- 2%)
T5642 -13.0% (threshold: +/- 2%)
T783 -2.7 (threshold: +/- 2%)
T9020 -11.1 (threshold: +/- 2%)
T9961 -3.4% (threshold: +/- 2%)
T1969 (compile_time/bytes_allocated) -2.2% (threshold: +/-1%)
T1969 (compile_time/max_bytes_used) +24.4% (threshold: +/-20%)
Additionally on other CIs:
haddock.Cabal -10.0% (threshold: +/- 5%)
haddock.compiler -9.5% (threshold: +/- 5%)
haddock.base (max bytes used) +24.6% (threshold: +/- 15%)
T10370 (max bytes used, i386) +18.4% (threshold: +/- 15%)
Metric Decrease:
T10421
T10421a
T12150
T12227
T12425
T12545
T12707
T13035
T14683
T3064
T4801
T5030
T5321FD
T5321Fun
T5631
T5642
T783
T9020
T9961
haddock.Cabal
haddock.compiler
Metric Decrease 'compile_time/bytes allocated':
T1969
Metric Increase 'compile_time/max_bytes_used':
T1969
T10370
haddock.base
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9f66fdf69b7bcdacbfc46e636668ad0fe509b1b6">9f66fdf6</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-14T15:50:34-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Drop --io-manager flag from testsuite configuration
This is no longer necessary as there are now dedicated testsuite ways
which run tests with WinIO.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/55fd1dc55990623dcf3b2e6143e766242315d757">55fd1dc5</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-14T15:51:10-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">llvm-targets: Add i686 targets
Addresses #18422.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f4cc57fa2df08f5b33a4cf86c3e041b8de9f6ebf">f4cc57fa</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-18T15:38:55-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Allow unsaturated runRW# applications
Previously we had a very aggressive Core Lint check which caught
unsaturated applications of runRW#. However, there is nothing
wrong with such applications and they may naturally arise in desugared
Core. For instance, the desugared Core of Data.Primitive.Array.runArray#
from the `primitive` package contains:
case ($) (runRW# @_ @_) (\s -> ...) of ...
In this case it's almost certain that ($) will be inlined, turning the
application into a saturated application. However, even if this weren't
the case there isn't a problem: CorePrep (after deleting an unnecessary
case) can simply generate code in its usual way, resulting in a call to
the Haskell definition of runRW#.
Fixes #18291.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ac6ae7c8d5a66bfe36973d1e92f3feef482d589">3ac6ae7c</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-18T15:38:55-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Add test for #18291
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a87a0b498f4c93c33e3db8d7f68fbaa5d812b408">a87a0b49</a></strong>
<div>
<span>by Eli Schwartz</span>
<i>at 2020-08-18T15:39:30-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">install: do not install sphinx doctrees
These files are 100% not needed at install time, and they contain
unreproducible info. See https://reproducible-builds.org/ for why this
matters.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/194b25ee97d93bc4bcb5bed9a0454debba7f2b6a">194b25ee</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-18T15:40:05-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Allow baseline commit to be set explicitly
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fdcf76450348d0554b7fd1768331f9efaf691e13">fdcf7645</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-18T15:40:05-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">gitlab-ci: Use MR base commit as performance baseline
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9ad5cab33b8b78a346896cc6de555365c73e6298">9ad5cab3</a></strong>
<div>
<span>by Fendor</span>
<i>at 2020-08-18T15:40:42-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Expose UnitInfoMap as it is part of the public API
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/aa4b744d51aa6bdb46064f981ea8e001627921d6">aa4b744d</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-18T22:11:36-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">testsuite: Only run llvm ways if llc is available
As noted in #18560, we previously would always run the LLVM ways since
`configure` would set `SettingsLlcCommand` to something non-null when
it otherwise couldn't find the `llc` executable. Now we rather probe for
the existence of the `llc` executable in the testsuite driver.
Fixes #18560.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0c5ed5c7eb30bc5462b67ff097c3388597265a4b">0c5ed5c7</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-18T22:12:13-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">DynFlags: refactor GHC.CmmToAsm (#17957, #10143)
This patch removes the use of `sdocWithDynFlags` from GHC.CmmToAsm.*.Ppr
To do that I've had to make some refactoring:
* X86' and PPC's `Instr` are no longer `Outputable` as they require a
`Platform` argument
* `Instruction` class now exposes `pprInstr :: Platform -> instr -> SDoc`
* as a consequence, I've refactored some modules to avoid .hs-boot files
* added (derived) functor instances for some datatypes parametric in the
instruction type. It's useful for pretty-printing as we just have to
map `pprInstr` before pretty-printing the container datatype.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/731c8d3bc5a84515793e5dadb26adf52f9280e13">731c8d3b</a></strong>
<div>
<span>by nineonine</span>
<i>at 2020-08-19T18:47:39-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Implement -Wredundant-bang-patterns (#17340)
Add new flag '-Wredundant-bang-patterns' that enables checks for "dead" bangs.
Dead bangs are the ones that under no circumstances can force a thunk that
wasn't already forced. Dead bangs are a form of redundant bangs. The new check
is performed in Pattern-Match Coverage Checker along with other checks (namely,
redundant and inaccessible RHSs). Given
f :: Bool -> Int
f True = 1
f !x = 2
we can detect dead bang patterns by checking whether @x ~ ⊥@ is satisfiable
where the PmBang appears in 'checkGrdTree'. If not, then clearly the bang is
dead. Such a dead bang is then indicated in the annotated pattern-match tree by
a 'RedundantSrcBang' wrapping. In 'redundantAndInaccessibles', we collect
all dead bangs to warn about.
Note that we don't want to warn for a dead bang that appears on a redundant
clause. That is because in that case, we recommend to delete the clause wholly,
including its leading pattern match.
Dead bang patterns are redundant. But there are bang patterns which are
redundant that aren't dead, for example
f !() = 0
the bang still forces the match variable, before we attempt to match on (). But
it is redundant with the forcing done by the () match. We currently don't
detect redundant bangs that aren't dead.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f">eb9bdaef</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-08-19T18:48:14-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add right-to-left rule for pattern bindings
Fix #18323 by adding a few lines of code to handle non-recursive
pattern bindings. see GHC.Tc.Gen.Bind
Note [Special case for non-recursive pattern bindings]
Alas, this confused the pattern-match overlap checker; see #18323.
Note that this patch only affects pattern bindings like that
for (x,y) in this program
combine :: (forall a . [a] -> a) -> [forall a. a -> a]
-> ((forall a . [a] -> a), [forall a. a -> a])
breaks = let (x,y) = combine head ids
in x y True
We need ImpredicativeTypes for those [forall a. a->a] types to be
valid. And with ImpredicativeTypes the old, unprincipled "allow
unification variables to unify with a polytype" story actually
works quite well. So this test compiles fine (if delicatedly) with
old GHCs; but not with QuickLook unless we add this patch
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/293c7fba6cde31151baaf2a92c723605ed458ade">293c7fba</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-21T09:36:38-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Put CFG weights into their own module (#17957)
It avoids having to query DynFlags to get them
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/50eb4460cd8412387e0c3755a9e0bafaced12bb2">50eb4460</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-21T09:36:38-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Don't use DynFlags in CmmToAsm.BlockLayout (#17957)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/659eb31b7a40f0aa2ba43c3454b5d9006fde837d">659eb31b</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-21T09:36:38-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">NCG: Dwarf configuration
* remove references to DynFlags in GHC.CmmToAsm.Dwarf
* add specific Dwarf options in NCGConfig instead of directly querying
the debug level
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/2d8ca9170328249a436c3b5647b8e548d32b11c8">2d8ca917</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-21T09:37:15-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix -ddump-stg flag
-ddump-stg was dumping the initial STG (just after Core-to-STG pass)
which was misleading because we want the final STG to know if a function
allocates or not. Now we have a new flag -ddump-stg-from-core for this and
-ddump-stg is deprecated.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fddddbf47d6ba2b1b3b6ec89bd40c8fa020e6606">fddddbf4</a></strong>
<div>
<span>by Vladislav Zavialov</span>
<i>at 2020-08-21T09:37:49-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Import qualified Prelude in Cmm/Parser.y
In preparation for the next version of 'happy', c95920 added a qualified
import to GHC/Parser.y but for some reason neglected GHC/Cmm/Parser.y
This patch adds the missing qualified import to GHC/Cmm/Parser.y and
also adds a clarifying comment to explain why this import is needed.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/989c1c27b1ec69d8cf56b438f0173d92c3547ab5">989c1c27</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-21T11:27:53-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">gitlab-ci: Test master branch as well
While these builds are strictly speaking redundant (since every commit
is tested by @marge-bot before making it into `master`), they are nevertheless
useful as they are displayed in the branch's commit list in GitLab's web interface.
Fixes #18595.</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e67ae884ebe42cb31fc4230301a5f555ae23cce8">e67ae884</a></strong>
<div>
<span>by Aditya Gupta</span>
<i>at 2020-08-22T03:29:00-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">mkUnique refactoring (#18362)
Move uniqFromMask from Unique.Supply to Unique.
Move the the functions that call mkUnique from Unique to Builtin.Uniques
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/03cfcfd450335d5ecb63fec1f55d9feafabb2b4c">03cfcfd4</a></strong>
<div>
<span>by Wander Hillen</span>
<i>at 2020-08-22T03:29:36-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add ubuntu 20.04 jobs for nightly and release
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3f50154591ada9064351ccec4adfe6df53ca2439">3f501545</a></strong>
<div>
<span>by Craig Ferguson</span>
<i>at 2020-08-22T03:30:13-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Utils: clarify docs slightly
The previous comment implies `nTimes n f` is either `f^{n+1}` or
`f^{2^n}` (when in fact it's `f^n`).
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8b86509270227dbc61f0700c7d9261a4c7672361">8b865092</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-08-23T14:12:53+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Do not print synonyms in :i (->), :i Type (#18594)
This adds a new printing flag `sdocPrintTypeAbbreviations` that is used
specifically to avoid ghci printing 'type (->) = (->)' and 'type Type = Type'.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d8f61182c3bdd1b6121c83be632b4941b907de88">d8f61182</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-08-23T14:12:56+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Move pprTyTcApp' inside pprTyTcApp
No semantic change
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/364258e0ad25bc95e69745554f5ca831ce80baf8">364258e0</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-08-24T00:32:31-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix types in silly shifts (#18589)
Patch written by Simon. I have only added a testcase.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b1eb38a0a7168d7612c791c4289cc02d900d402f">b1eb38a0</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-24T00:33:13-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Perf: make SDoc monad one-shot (#18202)
With validate-x86_64-linux-deb9-hadrian:
T1969 -3.4% (threshold: +/-1%)
T3294 -3.3% (threshold: +/-1%)
T12707 -1.4% (threshold: +/-1%)
Additionally with validate-x86_64-linux-deb9-unreg-hadrian:
T4801 -2.4% (threshold: +/-2%)
T13035 -1.4% (threshold: +/-1%)
T13379 -2.4% (threshold: +/-2%)
ManyAlternatives -2.5% (threshold: +/-2%)
ManyConstructors -3.0% (threshold: +/-2%)
Metric Decrease:
T12707
T1969
T3294
ManyAlternatives
ManyConstructors
T13035
T13379
T4801
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a77b9ec2a6153065565bca7bb154fff35b830b82">a77b9ec2</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-08-24T10:04:20-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add a test for #18397
The bug was fixed by !3421.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/05550a5abc369e1cc4fc48def532ca9ba9adcad7">05550a5a</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-24T10:04:59-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Avoid roundtrip through SDoc
As found by @monoidal on https://gitlab.haskell.org/ghc/ghc/-/merge_requests/3885#note_295126
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0a1ecc5fd45a46372c3935df596f05432db1b270">0a1ecc5f</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-08-25T07:37:05-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">SysTools.Process: Handle exceptions in readCreateProcessWithExitCode'
In #18069 we are observing MVar deadlocks from somewhere in ghc.exe.
This use of MVar stood out as being one of the more likely culprits.
Here we make sure that it is exception-safe.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/db8793ad417ebfcb57d42e8111674a90706a7918">db8793ad</a></strong>
<div>
<span>by Richard Eisenberg</span>
<i>at 2020-08-25T07:37:40-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Use tcView, not coreView, in the pure unifier.
Addresses a lingering point within #11715.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fb77207a23deade8e3f8598c34598535711264cc">fb77207a</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-08-25T07:38:16-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Use LIdP rather than (XRec p (IdP p))
This patch mainly just replaces use of
XRec p (IdP p)
with
LIdP p
One slightly more significant change is to parameterise
HsPatSynDetails over the pass rather than the argument type,
so that it's uniform with HsConDeclDetails and HsConPatDetails.
I also got rid of the dead code GHC.Hs.type.conDetailsArgs
But this is all just minor refactoring. No change in functionality.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8426a1364ba450fe48fc41a95b2ba76c8d1bb7c8">8426a136</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-08-25T07:38:54-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add a test for #18585
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/2d635a50b81732b2512b68c652aee36f489b5969">2d635a50</a></strong>
<div>
<span>by Takenobu Tani</span>
<i>at 2020-08-26T04:50:21-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">linters: Make CPP linter skip image files
This patch adds an exclusion rule for `docs/users_guide/images`,
to avoid lint errors of PDF files.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b7d98cb2606997e05ad6406929dae3aba746fbb9">b7d98cb2</a></strong>
<div>
<span>by Takenobu Tani</span>
<i>at 2020-08-26T04:50:21-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">users-guide: Color the logo on the front page of the PDF
This patch updates the logo with a recent color scheme.
This affects only the PDF version of the user's guide.
See also:
* https://mail.haskell.org/pipermail/ghc-devs/2020-August/019139.html
* https://gitlab.haskell.org/ghc/ghc/-/wikis/logo
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0b17fa185aec793861364afd9a05aa4219fbc019">0b17fa18</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-26T04:50:58-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Refactor UnitId pretty-printing
When we pretty-print a UnitId for the user, we try to map it back to its
origin package name, version and component to print
"package-version:component" instead of some hash.
The UnitId type doesn't carry these information, so we have to look into
a UnitState to find them. This is why the Outputable instance of
UnitId used `sdocWithDynFlags` in order to access the `unitState` field
of DynFlags.
This is wrong for several reasons:
1. The DynFlags are accessed when the message is printed, not when it is
generated. So we could imagine that the unitState may have changed
in-between. Especially if we want to allow unit unloading.
2. We want GHC to support several independent sessions at once, hence
several UnitState. The current approach supposes there is a unique
UnitState as a UnitId doesn't indicate which UnitState to use.
See the Note [Pretty-printing UnitId] in GHC.Unit for the new approach
implemented by this patch.
One step closer to remove `sdocDynFlags` field from `SDocContext`
(#10143).
Fix #18124.
Also fix some Backpack code to use SDoc instead of String.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dc476a5040cdc64c177de0f78edaafec0972cff4">dc476a50</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-26T04:51:35-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bignum: fix BigNat subtraction (#18604)
There was a confusion between the boolean expected by
withNewWordArrayTrimedMaybe and the boolean returned by subtracting
functions.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fcb10b6c69e388d8c6e777baf39920e2cc694501">fcb10b6c</a></strong>
<div>
<span>by Peter Trommler</span>
<i>at 2020-08-26T10:42:30-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">PPC and X86: Portable printing of IEEE floats
GNU as and the AIX assembler support floating point literals.
SPARC seems to have support too but I cannot test on SPARC.
Curiously, `doubleToBytes` is also used in the LLVM backend.
To avoid endianness issues when cross-compiling float and double literals
are printed as C-style floating point values. The assembler then takes
care of memory layout and endianness.
This was brought up in #18431 by @hsyl20.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/770100e0266750a313b34a52a60968410fcf0769">770100e0</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-08-26T10:43:13-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">primops: Remove Monadic and Dyadic categories
There were four categories of primops: Monadic, Dyadic, Compare, GenPrimOp.
The compiler does not treat Monadic and Dyadic in any special way,
we can just replace them with GenPrimOp.
Compare is still used in isComparisonPrimOp.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/01ff8c89727a91cbc1571ae54f73f5919d6aaa71">01ff8c89</a></strong>
<div>
<span>by Aditya Gupta</span>
<i>at 2020-08-27T14:19:26-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Consolidate imports in getMinimalImports (#18264)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/bacccb73c9b080c3c01a5e55ecb0a00cd8a77e55">bacccb73</a></strong>
<div>
<span>by Ryan Scott</span>
<i>at 2020-08-27T14:20:01-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Make {hsExpr,hsType,pat}NeedsParens aware of boxed 1-tuples
`hsExprNeedsParens`, `hsTypeNeedsParens`, and `patNeedsParens`
previously assumed that all uses of explicit tuples in the source
syntax never need to be parenthesized. This is true save for one
exception: boxed one-tuples, which use the `Solo` data type from
`GHC.Tuple` instead of special tuple syntax. This patch adds the
necessary logic to the three `*NeedsParens` functions to handle
`Solo` correctly.
Fixes #18612.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c6f50cea42a9ffc947bf4243986663cc820b0ec8">c6f50cea</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-08-28T02:22:36-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add missing primop documentation (#18454)
- Add three pseudoops to primops.txt.pp, so that Haddock renders
the documentation
- Update comments
- Remove special case for "->" - it's no longer exported from GHC.Prim
- Remove reference to Note [Compiling GHC.Prim] - the ad-hoc fix is no
longer there after updates to levity polymorphism.
- Document GHC.Prim
- Remove the comment that lazy is levity-polymorphic.
As far as I can tell, it never was: in 80e399639,
only the unfolding was given an open type variable.
- Remove haddock hack in GHC.Magic - no longer neccessary after
adding realWorld# to primops.txt.pp.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f065b6b012fb8f73689bc5c2a4904d5e6e377af8">f065b6b0</a></strong>
<div>
<span>by Tamar Christina</span>
<i>at 2020-08-28T02:23:13-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix use distro toolchian
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4517a38215eb72a4824c72d97377b9325059bf55">4517a382</a></strong>
<div>
<span>by Tamar Christina</span>
<i>at 2020-08-28T02:23:13-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">document how build system find toolchains on Windows
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/21c0a84f5da4a9f7cc1eba48874b457465bf1041">21c0a84f</a></strong>
<div>
<span>by John Ericson</span>
<i>at 2020-08-29T20:48:40-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Make fixed-size `Int32#` and `Int64#`
The boxed Int64 uses Int64#, but Int32# still uses Int#. The 32-bit case
is less pressing to change because it is not a source of brittle
CPP---it is the same thing on all platforms.
We need Int64/Word64 constant folding to avoid the let/app restriction on Core, so
that is implemented now. 32-bit constant unfolding and 32-bit literals
are left as follow-up.
This is the bulk of #11953
ghc-bignum: add support for Word64#/Int64# on 64-bit arch
Fix fingerprint Core generation
Fix some tests
Co-authored-by: Sylvain Henry <hsyl20@gmail.com>
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/463dde406d804c9de34840161579e95c5b477898">463dde40</a></strong>
<div>
<span>by John Ericson</span>
<i>at 2020-08-29T20:50:50-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Inline INT64 and WORD64 macros in primops.txt.pp
The definition is now unconditional so there is no reason for that CPP.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/54ae3476953ee1f81be49285a85e9312a2b159ad">54ae3476</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-29T20:50:51-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix toArgRep
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4952704c50ac86ff60fc37a7a7a1c357da925280">4952704c</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-08-29T20:50:51-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Adapt rules from #16402 to Word64#/Int64#
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8557e5246ff12ca1a09595166ec09d82528267a6">8557e524</a></strong>
<div>
<span>by John Ericson</span>
<i>at 2020-08-29T20:50:51-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Copy enumFrom* implementations from Int/Word for Int64/Word64
Without this, we don't get proper list fusion.
I think this sort of copying is OK for now, but we absolutely need
something better if we are going to make `IntN` use `IntN#` for all `N`.
The degree to which proper metaprogramming has been punted upon by
factoring everything through the native-sized types is disconcerting.
</pre>
</li>
</ul>
<h4>30 changed files:</h4>
<ul>
<li class="file-stats">
<a href="#587d266bb27a4dc3022bbed44dfa19849df3044c">
.gitlab-ci.yml
</a>
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<li class="file-stats">
<a href="#157f7634c25bc6366cb7c9c9edb48e819dce38db">
.gitlab/ci.sh
</a>
</li>
<li class="file-stats">
<a href="#412267f7d5ed866deae5ac2ca598ff8092b826b6">
.gitlab/linters/check-cpp.py
</a>
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<a href="#9ab3868b23ed5d5a6e12ef902049902556fa4009">
aclocal.m4
</a>
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<a href="#d0d96a6d03668aeab20ebe05e2c4ccb798c7e64c">
compiler/GHC.hs
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<a href="#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77">
compiler/GHC/Builtin/Names.hs
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compiler/GHC/Builtin/Names/TH.hs
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<a href="#a1519b7fe8a0d4b42e4aaa927fb6ab5b5da0fcdd">
compiler/GHC/Builtin/PrimOps.hs
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compiler/GHC/Builtin/Types.hs
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compiler/GHC/Builtin/Types.hs-boot
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compiler/GHC/Builtin/Types/Prim.hs
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<a href="#8dc7109003a77f8a82e987dc1de31466aa956174">
compiler/GHC/Builtin/Uniques.hs
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compiler/GHC/Builtin/Uniques.hs-boot
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compiler/GHC/Builtin/Utils.hs
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compiler/GHC/Cmm.hs
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compiler/GHC/Cmm/CLabel.hs
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compiler/GHC/Cmm/CallConv.hs
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compiler/GHC/Cmm/CommonBlockElim.hs
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compiler/GHC/Cmm/DebugBlock.hs
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compiler/GHC/Cmm/Expr.hs
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compiler/GHC/Cmm/Info/Build.hs
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compiler/GHC/Cmm/LayoutStack.hs
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compiler/GHC/Cmm/Liveness.hs
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compiler/GHC/Cmm/Opt.hs
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compiler/GHC/Cmm/Parser.y
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compiler/GHC/Cmm/Ppr/Expr.hs
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compiler/GHC/Cmm/ProcPoint.hs
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