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<h3>
Leif Metcalf pushed to branch wip/z-encoding-note
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/35a7b7ecabeba39e53d6dea78ecc2d3eca8b1b24">35a7b7ec</a></strong>
<div>
<span>by Adam Sandberg Eriksson</span>
<i>at 2020-09-14T17:46:16-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">docs: -B rts option sounds the bell on every GC (#18351)</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5ae8212c3d2f284bc18a562625be3f4640984497">5ae8212c</a></strong>
<div>
<span>by Wander Hillen</span>
<i>at 2020-09-14T17:46:54-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Populate gitlab cache after building
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a5ffb39afc386729c821b924dd2c6a93917e1b5f">a5ffb39a</a></strong>
<div>
<span>by Wander Hillen</span>
<i>at 2020-09-14T17:46:54-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Move ahead cabal cache restoration to before use of cabal
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e8b37c21fdcb9ca515e3dd2fab1661b7792fb728">e8b37c21</a></strong>
<div>
<span>by Wander Hillen</span>
<i>at 2020-09-14T17:46:54-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Do the hadrian rebuild multicore
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/07762eb5cfe735e131a7f017939a6b0ccfb28389">07762eb5</a></strong>
<div>
<span>by Wander Hillen</span>
<i>at 2020-09-14T17:46:54-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Also cache other hadrian builds
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8610bcbeb11b898f85f228b755fa8421b5ae3e34">8610bcbe</a></strong>
<div>
<span>by DenisFrezzato</span>
<i>at 2020-09-15T15:19:08-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix rtsopts documentation
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c7182a5c67fe8b5bd256cb8eb805562636853ea2">c7182a5c</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-09-15T15:19:44-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Care with implicit-parameter superclasses
Two bugs, #18627 and #18649, had the same cause: we were not
account for the fact that a constaint tuple might hide an implicit
parameter.
The solution is not hard: look for implicit parameters in
superclasses. See Note [Local implicit parameters] in
GHC.Core.Predicate.
Then we use this new function in two places
* The "short-cut solver" in GHC.Tc.Solver.Interact.shortCutSolver
which simply didn't handle implicit parameters properly at all.
This fixes #18627
* The specialiser, which should not specialise on implicit parameters
This fixes #18649
There are some lingering worries (see Note [Local implicit
parameters]) but things are much better.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0f3884b0b72fb1e4641450e68f63580c0e86f515">0f3884b0</a></strong>
<div>
<span>by Zubin Duggal</span>
<i>at 2020-09-15T15:20:23-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Export enrichHie from GHC.Iface.Ext.Ast
This is useful for `ghcide`
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b3143f5a0827b640840ef241a30933dc23b69d91">b3143f5a</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-09-15T15:21:06-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Enhance metrics output
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4283feaa9e0826211f7a71d543054c989ea32965">4283feaa</a></strong>
<div>
<span>by Ryan Scott</span>
<i>at 2020-09-15T15:21:43-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Introduce and use DerivClauseTys (#18662)
This switches `deriv_clause_tys` so that instead of using a list of
`LHsSigType`s to represent the types in a `deriving` clause, it now
uses a sum type. `DctSingle` represents a `deriving` clause with no
enclosing parentheses, while `DctMulti` represents a clause with
enclosing parentheses. This makes pretty-printing easier and avoids
confusion between `HsParTy` and the enclosing parentheses in
`deriving` clauses, which are different semantically.
Fixes #18662.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/376ba2fcbc02f4f28b6e6f59a3a8f719b2f4dc15">376ba2fc</a></strong>
<div>
<span>by Leif Metcalf</span>
<i>at 2020-09-15T17:27:38-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Make Z-encoding comment into a note
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d722c58e3e2311e655d778bb027bf4010dd23e66">d722c58e</a></strong>
<div>
<span>by Leif Metcalf</span>
<i>at 2020-09-15T17:27:38-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Cosmetic
</pre>
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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="#ab22d7ae4d245581b701367e386d7e886e416e76">
compiler/GHC/Core/Opt/Specialise.hs
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<a href="#0ca1508e5b0cedec2f19fe10e414597184209573">
compiler/GHC/Core/Predicate.hs
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<a href="#d51029aec6ce58e66d4b48865c1dd0d2038fda29">
compiler/GHC/Data/FastString.hs
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<a href="#75bfcd03f3ba9315d33104fcb0424c6bfeb4e334">
compiler/GHC/Hs/Decls.hs
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compiler/GHC/Hs/Extension.hs
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compiler/GHC/Hs/Instances.hs
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compiler/GHC/HsToCore/Docs.hs
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<a href="#3c19c0be465f9a28d7b69f89c55648080fcc37eb">
compiler/GHC/HsToCore/Quote.hs
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<a href="#649144a78135a23cabfc90dd83c4aabf448eb6ab">
compiler/GHC/Iface/Ext/Ast.hs
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<a href="#bf951467d4a9aa443cb109cb4c84a2891945649b">
compiler/GHC/Parser.y
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<a href="#13755bdc5d6c6b4c6f31604eb0da778521355795">
compiler/GHC/Parser/PostProcess/Haddock.hs
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<a href="#7dd1cd0f6f2164a14c83d9aa564dd32bc30e447a">
compiler/GHC/Rename/Module.hs
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compiler/GHC/Tc/Deriv.hs
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compiler/GHC/Tc/Instance/Class.hs
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compiler/GHC/Tc/Module.hs
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compiler/GHC/Tc/Solver.hs
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<a href="#f018e77421f495c6f75733fee4a511cfe57bebe8">
compiler/GHC/Tc/Solver/Canonical.hs
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<a href="#f639b0b31b7245cb7d34ac190b798f5ec1c7da2e">
compiler/GHC/Tc/Solver/Interact.hs
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<a href="#0c6b585a8a21f8340a85ca2cef89c4b1bf5a8953">
compiler/GHC/Tc/Solver/Monad.hs
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compiler/GHC/Tc/TyCl/Instance.hs
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compiler/GHC/Tc/Utils/TcType.hs
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compiler/GHC/ThToHs.hs
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compiler/GHC/Utils/Encoding.hs
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docs/users_guide/phases.rst
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docs/users_guide/runtime_control.rst
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<a href="#6e9e255267780d64d50e2445aee2360e1269dcf1">
testsuite/driver/perf_notes.py
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<a href="#326e115e015c04db679ca1d9dbc1092906bef3a6">
testsuite/driver/runtests.py
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testsuite/tests/simplCore/should_compile/T18649.hs
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