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<h3>
Alan Zimmerman pushed to branch wip/az/exactprint
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/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Comments: change outdated reference to mergeOps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Remove outdated comment in rnHsTyKi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/6e75fcf0b8b702d412c204add30855042bf7623c">6e75fcf0</a></strong>
<div>
<span>by Alan Zimmerman</span>
<i>at 2020-10-08T21:37:32+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Proof of Concept implementation of in-tree API Annotations
This MR introduces a possible machinery to introduce API Annotations
into the TTG extension points.
It is intended to be a concrete example for discussion.
It still needs to process comments.
----
Work in progress, adding more TTG extensions for annotations.
And fixing ppr round-trip tests by being able to blank out in-tree
annotations, as done with SrcSpans.
This is needed for the case of
class Foo a where
for which current ppr does not print the "where".
Rename AA to AddApiAnn and AA to AddAnn
Add XConPatIn and XConPatOut
Rebase
----
First pass at bringing in LocatedA for API anns in locations
Treatment of ECP in parsing is provisional at this stage, leads to some
horribly stuff in Parser.y and RdrHsSyn.
It is an extensive but not invasive change. I think (AZ).
Locally it reports some parsing tests using less memory.
Add ApiAnns to the HsExpr data structure.
rebase.
Change HsMatchContext and HsStmtContext to use an id, not a GhcPass
parameter.
Add ApiAnns to Hs/Types
Rebase
Rebased 2020-03-25
WIP on in-tree annotations
Includes updating HsModule
Imports
LocateA ImportDecl so we can hang AnnSemi off it
A whole bunch of stuff more
InjectivityAnn and FamEqn now have annotations in them
Add annotations to context srcspan
----
In-tree annotations: LHsDecl and LHsBind LocatedA
----
WIP on in-tree annotations
----
in-tree annotations: LHsType is now LocatedA
----
FunDeps is now also a HS data type
----
WIP. Added LocatedA to Pat, Expr, Decl
And worked some more through Parser.y
----
LStmt now Located
----
Finished working through Parser.y, tests seem ok
failures relate to annotations.
Adding test infrastructure for check-exact
Like check-ppr, but checking for an exact reproduction of the parsed
source file.
Starting to work on actual exact printer
Bring in ApiAnnName
As an alternative for LocatedA, to be used for names only.
Carrying extra name adornments, such as locations of backticks,
parens, etc.
Working on changing ApiAnnName to accurately reflect actual usage
Get rid of AnnApiName in favour of LocatedN
Working on check-exact. Making progress
Working on the ghc-exact bit
Progress, can reproduce the first Test.hs file.
Move API Annotations out of the extensions to annotations
Remove LHsLocalBinds
Fix up after rebasing to bring in XRec
Main thing is to make
type instance XRec (GhcPass p) a = GenLocated (Anno a) a
type family Anno a = b
But this has massive implications.
</pre>
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compiler/GHC.hs
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