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<h3>
Ben Gamari pushed to branch wip/tyconapp-opts
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/90945a225e18900444c8095387ac7cd28dca30a7">90945a22</a></strong>
<div>
<span>by Cale Gibbard</span>
<i>at 2020-12-11T12:36:23-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Implement type applications in patterns
The haddock submodule is also updated so that it understands the changes
to patterns.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0f15a2daf64c45bf0ce8c9ea1d8805975aefc549">0f15a2da</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Display FFI labels (fix #18539)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/46f1da5908f00407f1f9ede43c02f86e8a0d9cb5">46f1da59</a></strong>
<div>
<span>by Aaron Allen</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Elide extraneous messages for :doc command (#15784)
Do not print `<has no documentation>` alongside a valid doc.
Additionally, if two matching symbols lack documentation then the
message will only be printed once. Hence, `<has no documentation>` will
be printed at most once and only if all matching symbols are lacking
docs.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d5c31cd0f8d8d7e90295caca142fd958b7a12b62">d5c31cd0</a></strong>
<div>
<span>by Aaron Allen</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add :doc test case for duplicate record fields
Tests that the output of the `:doc` command is correct for duplicate
record fields defined using -XDuplicateRecordFields.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7af03d603c89495124e8959055b53c70d118cd21">7af03d60</a></strong>
<div>
<span>by Ryan Scott</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Delete outdated Note [Kind-checking tyvar binders for associated types]
This Note has severely bitrotted, as it has no references anywhere in the
codebase, and none of the functions that it mentions exist anymore. Let's just
delete this. While I was in town, I deleted some outdated comments from
`checkFamPatBinders` of a similar caliber.
Fixes #19008.
[ci skip]
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e733612bab4a7b3f942b48007e58b66a69d21e11">e733612b</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Arrows: correctly query arrow methods (#17423)
Consider the following code:
proc (C x y) -> ...
Before this patch, the evidence binding for the Arrow dictionary was
attached to the C pattern:
proc (C x y) { $dArrow = ... } -> ...
But then when we desugar this, we use arrow operations ("arr", ">>>"...)
specialised for this arrow:
let
arr_xy = arr $dArrow -- <-- Not in scope!
...
in
arr_xy (\(C x y) { $dArrow = ... } -> ...)
This patch allows arrow operations to be type-checked before the proc
itself, avoiding this issue.
Fix #17423
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3f9fa2a2e4249100299174ccb05e8464b09151f9">3f9fa2a2</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Validate script: fix configure command when using stack
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ec7926de7d14c10ec32f46e2031f80a2a9625e47">ec7926de</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Hadrian: fix libffi tarball parsing
Fix parsing of "libffi-3.3.tar.gz".
NB: switch to a newer libffi isn't done in this patch
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8c8884fffca1d54c168b99b570b4bfc732de2fb1">8c8884ff</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Parser: move parser utils into their own module
Move code unrelated to runtime evaluation out of GHC.Runtime.Eval
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7e029c9aeb7ce1e0c759df92bc669b93ce072549">7e029c9a</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Move SizedSeq into ghc-boot
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/039e76f9dc5c35b2c238b0c1c0ad2e255dbd589d">039e76f9</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">ghci: don't compile unneeded modules
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/08e38cae2bfebc6216f14002b25540e64829b557">08e38cae</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">ghci: reuse Arch from ghc-boot
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ef6c6ecf98288c327f3ffc4c0fd076061f82ffa0">ef6c6ecf</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">rts: don't use siginterrupt (#19019)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f10df0ea07b47463f952b7c4e9a314a6feab4c70">f10df0ea</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Use static array in zeroCount
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/cdcdb4aa39e45c9d30bc72bc67489a3555b3b139">cdcdb4aa</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">DmdAnal: Annotate top-level function bindings with demands (#18894)
It's useful to annotate a non-exported top-level function like `g` in
```hs
module Lib (h) where
g :: Int -> Int -> (Int,Int)
g m 1 = (m, 0)
g m n = (2 * m, 2 `div` n)
{-# NOINLINE g #-}
h :: Int -> Int
h 1 = 0
h m
| odd m = snd (g m 2)
| otherwise = uncurry (+) (g 2 m)
```
with its demand `UCU(CS(P(1P(U),SP(U))`, which tells us that whenever `g` was
called, the second component of the returned pair was evaluated strictly.
Since #18903 we do so for local functions, where we can see all calls.
For top-level functions, we can assume that all *exported* functions are
demanded according to `topDmd` and thus get sound demands for
non-exported top-level functions.
The demand on `g` is crucial information for Nested CPR, which may the
go on and unbox `g` for the second pair component. That is true even if
that pair component may diverge, as is the case for the call site `g 13
0`, which throws a div-by-zero exception.
In `T18894b`, you can even see the new demand annotation enabling us to
eta-expand a function that we wouldn't be able to eta-expand without
Call Arity.
We only track bindings of function type in order not to risk huge compile-time
regressions, see `isInterestingTopLevelFn`.
There was a CoreLint check that rejected strict demand annotations on
recursive or top-level bindings, which seems completely unjustified.
All the cases I investigated were fine, so I removed it.
Fixes #18894.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/1906844878a42d8684e96479f924909d8a29b27c">19068448</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Demand: Simplify `CU(U)` to `U` (#19005)
Both sub-demands encode the same information.
This is a trivial change and already affects a few regression tests
(e.g. `T5075`), so no separate regression test is necessary.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0202bd494ee4fb53e512a26aba444359a63b1661">0202bd49</a></strong>
<div>
<span>by Adam Sandberg Ericsson</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">hadrian: correctly copy the docs dir into the bindist #18669
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6ead906f070666f05fb5b530fc7121b9f65eafcf">6ead906f</a></strong>
<div>
<span>by Adam Sandberg Ericsson</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">mkDocs: support hadrian bindists #18973
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/547a01dc22b4dbcfb447b61ec63cedf2ab603a63">547a01dc</a></strong>
<div>
<span>by John Ericson</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove old .travis.yml
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6f404e9285a848f847a6880bfe836a3f3bdef8e4">6f404e92</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-12-14T12:45:26-05:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Optimise nullary type constructor usage
During the compilation of programs GHC very frequently deals with
the `Type` type, which is a synonym of `TYPE 'LiftedRep`. This patch
teaches GHC to avoid expanding the `Type` synonym (and other nullary
type synonyms) during type comparisons, saving a good amount of work.
This optimisation is described in `Note [Comparing nullary type
synonyms]`.
To maximize the impact of this optimisation, we introduce a few
special-cases to reduce `TYPE 'LiftedRep` to `Type`. See
`Note [Prefer Type over TYPE 'LiftedPtrRep]`.
Closes #17958.
Metric Decrease:
T18698b
T1969
T12227
T12545
T12707
T14683
T3064
T5631
T5642
T9020
T9630
T9872a
T13035
haddock.Cabal
haddock.base
</pre>
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