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<h3>
Marge Bot pushed to branch wip/marge_bot_batch_merge_job
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/acccf67ece2f3805bcd907bbd2c08a8f5b386f93">acccf67e</a></strong>
<div>
<span>by Andrew Martin</span>
<i>at 2020-05-07T14:58:39-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Implement cstringLength# and FinalPtr
This function and its accompanying rule resolve issue #5218.
A future PR to the bytestring library will make the internal
Data.ByteString.Internal.unsafePackAddress compute string length
with cstringLength#. This will improve the status quo because it is
eligible for constant folding.
Additionally, introduce a new data constructor to ForeignPtrContents
named FinalPtr. This additional data constructor, when used in the
IsString instance for ByteString, leads to more Core-to-Core
optimization opportunities, fewer runtime allocations, and smaller
binaries.
Also, this commit re-exports all the functions from GHC.CString
(including cstringLength#) in GHC.Exts. It also adds a new test
driver. This test driver is used to perform substring matches on Core
that is dumped after all the simplifier passes. In this commit, it is
used to check that constant folding of cstringLength# works.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c3bcb6af47e6e8575df3d39a64d2146908c94d00">c3bcb6af</a></strong>
<div>
<span>by Brian Foley</span>
<i>at 2020-05-07T14:58:40-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove further dead code found by a simple Python script.
Avoid removing some functions that are part of an API even
though they're not used in-tree at the moment.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebb58b0e133bb0472271064daf9a578947d3ff62">ebb58b0e</a></strong>
<div>
<span>by Julien Debon</span>
<i>at 2020-05-07T14:58:44-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add doc examples for Bifoldable
See #17929
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e4b1d38c1862afaf51c073aa974252da339c90bb">e4b1d38c</a></strong>
<div>
<span>by Julien Debon</span>
<i>at 2020-05-07T14:58:46-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">doc (Bitraversable): Add examples to Bitraversable
* Add examples to Data.Bitraversable
* Fix formatting for (,) in Bitraversable and Bifoldable
* Fix mistake on bimapAccumR documentation
See #17929
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/77ea518c93fb81f18bc8cff418f31d1b67eb21d9">77ea518c</a></strong>
<div>
<span>by John Ericson</span>
<i>at 2020-05-07T14:58:48-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">HsSigWcTypeScoping: Pull in documentation from stray location
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7f7e0e7d2e14510059c4d9e1195d1b1e6de2b91f">7f7e0e7d</a></strong>
<div>
<span>by John Ericson</span>
<i>at 2020-05-07T14:58:48-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Rename local `real_fvs` to `implicit_vs`
It doesn't make sense to call the "free" variables we are about to
implicitly bind the real ones.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c1185e83553d7d33ab16bc627730dd665db38363">c1185e83</a></strong>
<div>
<span>by John Ericson</span>
<i>at 2020-05-07T14:58:48-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">A few tiny style nits with renaming
- Use case rather than guards that repeatedly scrutenize same thing.
- No need for view pattern when `L` is fine.
- Use type synnonym to convey the intent like elsewhere.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/341ece26283a256bf98c84b0b4c29a8ab14f9c4b">341ece26</a></strong>
<div>
<span>by John Ericson</span>
<i>at 2020-05-07T14:58:48-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add `forAllOrNothing` function with note
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/306bc7f46f78cf21118fce60c2d4656782a15f7e">306bc7f4</a></strong>
<div>
<span>by Joseph C. Sible</span>
<i>at 2020-05-07T14:58:50-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Document lawlessness of Ap's Num instance</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9e71105568e90aee0001e8afeab2503320dc18ba">9e711055</a></strong>
<div>
<span>by Joseph C. Sible</span>
<i>at 2020-05-07T14:58:50-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Apply suggestion to libraries/base/Data/Monoid.hs</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d03c9c6f6cb86e61851bdbabc0acb0887207607c">d03c9c6f</a></strong>
<div>
<span>by Joseph C. Sible</span>
<i>at 2020-05-07T14:58:50-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Apply more suggestions from Simon Jakobi</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5286b945700a9ad05940134d91607aaed9b73571">5286b945</a></strong>
<div>
<span>by Adam Gundry</span>
<i>at 2020-05-07T14:58:51-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Reject all duplicate declarations involving DuplicateRecordFields (fixes #17965)
This fixes a bug that resulted in some programs being accepted that used the same
identifier as a field label and another declaration, depending on the order they
appeared in the source code.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/df9d7db4cce8ebc7a7fcf2aab4fb9113b82cd553">df9d7db4</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-05-07T14:58:51-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix specialisation for DFuns
When specialising a DFun we must take care to saturate the
unfolding. See Note [Specialising DFuns] in Specialise.
Fixes #18120
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/62aea86f290ac722d414b97c3784d2f0c0f36bcc">62aea86f</a></strong>
<div>
<span>by Greg Steuck</span>
<i>at 2020-05-07T14:58:53-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove unused SEGMENT_PROT_RWX
It's been unused for a year and is problematic on any OS which
requires W^X for security.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4484f0f71158518fb2bf8b8b66845952e7c555df">4484f0f7</a></strong>
<div>
<span>by nineonine</span>
<i>at 2020-05-07T14:58:54-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add test for #16167
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0dcde93c60559014afd58ee5c24c8e3f59ed7238">0dcde93c</a></strong>
<div>
<span>by Ryan Scott</span>
<i>at 2020-05-07T14:58:55-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bump exceptions submodule so that dist-boot is .gitignore'd
`exceptions` is a stage-0 boot library as of commit
30272412fa437ab8e7a8035db94a278e10513413, which means that building
`exceptions` in a GHC tree will generate a `dist-boot` directory.
However, this directory was not specified in `exceptions`'
`.gitignore` file, which causes it to dirty up the current `git`
working directory.
Accordingly, this bumps the `exceptions` submodule to commit
ghc/packages/exceptions@23c0b8a50d7592af37ca09beeec16b93080df98f,
which adds `dist-boot` to the `.gitignore` file.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8dfdce68107799c040e9387a0b7f31d8379befa5">8dfdce68</a></strong>
<div>
<span>by Ömer Sinan Ağacan</span>
<i>at 2020-05-07T14:59:00-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Linker.c: initialize n_symbols of ObjectCode with other fields
</pre>
</li>
</ul>
<h4>30 changed files:</h4>
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<a href="#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77">
compiler/GHC/Builtin/Names.hs
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<a href="#f9f29a5a64a0b66967f0a7c538dbf8ad06a9f5bb">
compiler/GHC/Cmm/Utils.hs
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<a href="#383a469809c6f6c238dbf10f7eb5e6e6ec7eae6e">
compiler/GHC/CmmToAsm/PPC/Cond.hs
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<a href="#b8960ccd7a97c06d974e6369b8b4b019d8fee8aa">
compiler/GHC/CmmToAsm/SPARC/Cond.hs
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<a href="#0f6d4f3a187ff5a5b59934f5a93adf2d4eed24ad">
compiler/GHC/CmmToAsm/X86/Cond.hs
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<a href="#b5ac041c7f79084a7a7626eda4cdadda3457d235">
compiler/GHC/CmmToLlvm/Base.hs
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<a href="#aa79261abf782f3dc603af7fbd5c4b08ed3ddb88">
compiler/GHC/Core/Opt/ConstantFold.hs
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compiler/GHC/Core/Opt/Specialise.hs
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compiler/GHC/Core/Unfold.hs
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compiler/GHC/Data/FastString.hs
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compiler/GHC/HsToCore/Binds.hs
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compiler/GHC/Plugins.hs
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compiler/GHC/Rename/HsType.hs
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compiler/GHC/Rename/Module.hs
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compiler/GHC/Rename/Names.hs
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compiler/GHC/StgToCmm/Utils.hs
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compiler/GHC/SysTools/Tasks.hs
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compiler/GHC/Tc/Gen/Sig.hs
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compiler/GHC/Tc/Types/Evidence.hs
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compiler/GHC/Tc/Utils/Monad.hs
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<a href="#1db07ed8cd9bab6b217a8f5a140176d3cb8672fd">
compiler/GHC/Tc/Validity.hs
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<a href="#166e3514d27c63ef7e86af29830d9e8b2a31c8b1">
compiler/GHC/Types/Basic.hs
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compiler/GHC/Types/Name/Reader.hs
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compiler/GHC/Types/Var/Env.hs
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<a href="#4d45cd1896284e4b4034580e431af68b09013b33">
compiler/GHC/Utils/Misc.hs
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<a href="#b421960e854c6cfa1e4ca830bd6a5fc6eef91168">
docs/users_guide/8.12.1-notes.rst
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<a href="#271fc04c22b6c80a8cf3a4de059bb99f878c6730">
libraries/base/Data/Bifoldable.hs
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<a href="#cad85fefbf89e6d92f38b3283ec4e405b01793e7">
libraries/base/Data/Bitraversable.hs
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<a href="#d28e8f7991f23b5670e34ba0c037beefb6bf58a9">
libraries/base/Data/Monoid.hs
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<a href="#48a6c03232a2b3f836daeff09b3c6e3790804632">
libraries/base/GHC/Exts.hs
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