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<h3 style="margin-top: 20px; margin-bottom: 10px;">
Serge S. Gulin pushed to branch wip/T24744 at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4 style="margin-top: 10px; margin-bottom: 10px;">
Commits:
</h4>
<ul>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7536181d54e929397716dedcef7f04975a699373">7536181d</a></strong>
<div>
<span> by Matthew Pickering </span> <i> at 2024-11-25T14:00:07-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>driver: Always link against "base" package when one shot linking
The default value for base-unit-id is stored in the settings file.
At install time, this can be set by using the BASE_UNIT_ID environment
variable.
At runtime, the value can be set by `-base-unit-id` flag.
For whether all this is a good idea, see #25382
Fixes #25382
</pre>
</li>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7f90f319531c312a074d21688b05f664f0d173fc">7f90f319</a></strong>
<div>
<span> by Andreas Klebinger </span> <i> at 2024-11-25T14:00:44-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>Compacting GC: Handle black holes in large objects.
As #14497 showed black holes can appear inside large objects when
we capture a computation and later blackhole it like we do for AP_STACK
closures.
Fixes #24791
</pre>
</li>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/291388e18b5b61a02a43cc153a642fd67d6127c4">291388e1</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2024-11-25T14:01:19-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>ci: minor nix-in-docker improvements
This patch makes some minor improvements re nix-in-docker logic in the
ci configuration:
- Update `nixos/nix` to the latest version
- Apply $CPUS to `cores`/`max-jobs` to avoid oversubscribing while
allowing a reasonable degree of parallelism
- Remove redundant `--extra-experimental-features nix-command` in
later `nix shell` invocations, it's already configured in
`/etc/nix/nix.conf`
</pre>
</li>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e684c40693577f47b1e6984f4c7994859edef6ad">e684c406</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2024-11-25T14:01:57-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>ci: avoid depending on stack job for test-bootstrap jobs
This patch makes test-bootstrap related ci jobs only depend on
hadrian-ghc-in-ghci job to finish, consistent with other jobs in the
full-build stage generated by gen_ci.hs. This allows the jobs to be
spawned earlier and improve overall pipeline parallelism.
</pre>
</li>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/caaf53881d5cc82ebff617f39ad5363429d2eccf">caaf5388</a></strong>
<div>
<span> by Simon Hengel </span> <i> at 2024-11-25T14:02:41-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>Refactoring: Remove `pSupportedExts` from `ParserOpts`
This is never used for lexing / parsing. It is only used by
`GHC.Parser.Header.getOptions`.
</pre>
</li>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/41f8365c1de962f83d2fed44e8d6cbe5279d6cd8">41f8365c</a></strong>
<div>
<span> by Arnaud Spiwack </span> <i> at 2024-11-25T14:03:23-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>Add test for #25515
</pre>
</li>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9279619f09a9449a35ac467c1c2ff7380fca9d06">9279619f</a></strong>
<div>
<span> by Arnaud Spiwack </span> <i> at 2024-11-25T14:03:23-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>Desugar record notation with correct multiplicities
Simply uses the multiplicity as stored in the field. As I'm writing
this commit, the only possible multiplicity is 1, but !13525 is
changing this. It's actually easier to take !13525 into account.
Fixes #25515.
</pre>
</li>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fcc3ae6ec74725804364742f864ded7038e3520d">fcc3ae6e</a></strong>
<div>
<span> by Andreas Klebinger </span> <i> at 2024-11-26T08:24:58-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>Clarify INLINE unfolding optimization docs.
Fixes #24660
</pre>
</li>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/88c4fe1d8a3bdbedf3972fde12f663a974cc2191">88c4fe1d</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2024-11-26T08:25:34-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>rts: remove -Wl,-U,___darwin_check_fd_set_overflow hack
This patch bumps macOS minimum SDK version to 11.0 for x86_64-darwin
to align it with aarch64-darwin. This allows us to get rid of the
horrible -Wl,-U,___darwin_check_fd_set_overflow hack, which is causing
linker warnings and testsuite failures on macOS 15. Fixes #25504.
</pre>
</li>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ff23b86b78f17b44b38f7ad8a97a7138eead0b2c">ff23b86b</a></strong>
<div>
<span> by Serge S. Gulin </span> <i> at 2024-11-26T18:09:57+03:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>JS: Basic cleanup for unused stuff to simplify things.
1. Make `staticInitStat`, `staticDeclStat`, `allocUnboxedConStatic`, `allocateStaticList`, `jsStaticArg` local to modules.
2. Remove unused `hdRawStr`, `hdStrStr` from Haskell and JavaScript (`h$pstr`, `h$rstr`, `h$str`).
3. Introduce a special type `StaticAppKind` enumeration and `StaticApp` to represent boxed scalar static applications. Originally, StaticThunk supported to pass Maybe when it became Nothing for initializied thunks in an alternatie way but it is not used anymore.
</pre>
</li>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8e6c75b120369d5b80cdd0817988899dc350334c">8e6c75b1</a></strong>
<div>
<span> by Serge S. Gulin </span> <i> at 2024-11-26T18:09:57+03:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>JS: Add trivial optimizations for `unpackCString` and `unpackCStringUtf8`.
It became possible due of introduction strings unfloating at Sinker pass (#13185). Earns few more bytes at optimizations.
</pre>
</li>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c2f77764c89258251733ecb51cbca82766ef6133">c2f77764</a></strong>
<div>
<span> by Serge S. Gulin </span> <i> at 2024-11-26T18:09:57+03:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #28272d; position: relative; font-family: "GitLab Mono","JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>JS: Specialize unpackCString# CAFs (fixes #24744)
Code analysis shown that such optimization would be possible out of the box if `cachedIdentForId` allowed to do that for Haskell `Id`s which are represented by few JavaScript `Ident`s. It is a usual for strings which are represented at JavaScript as a pair of 2 values: the string content and the offset where to start reading actual string from the full content. Usually offset is 0 but technically we need to allow such complex structures to be treated as "global".
Enabling it there shown that `genToplevelRhs` and `globalOccs` had inaccuracies in their implementations:
1. `globalOccs` operated over JavaScript's `Ident`s but for complex structures it didn't pay attention to the fact that different Idents actually could be pointed to same Id. Now the algo is changed to calculate occurencies for Ids.
2. `genToplevelRhs` didn't assume that different Idents pointed to same Id can have mixed order of occurence. But actually the order is important. Strings are encoded into 2 variables where first is content and second is offset and their order are not interchangeable. It is fixed by regeneration Idents from collected Ids which is fine because all Idents generation is passed through the Cache and they are quasi-stable.
</pre>
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<h4 style="margin-top: 10px; margin-bottom: 10px;">
30 changed files:
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.gitlab-ci.yml
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.gitlab/generate-ci/gen_ci.hs
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.gitlab/jobs.yaml
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compiler/GHC/Driver/Backpack.hs
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compiler/GHC/Driver/Config/Parser.hs
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compiler/GHC/Driver/DynFlags.hs
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compiler/GHC/Driver/Pipeline/Execute.hs
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compiler/GHC/Driver/Session.hs
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compiler/GHC/Parser/HaddockLex.x
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compiler/GHC/Parser/Header.hs
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compiler/GHC/Parser/Lexer.x
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compiler/GHC/Settings.hs
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compiler/GHC/Settings/IO.hs
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