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<h3 style="margin-top: 20px; margin-bottom: 10px;">
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at <a href="https://gitlab.haskell.org/ghc/ghc" style="color: #1068bf;">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4 style="margin-top: 10px; margin-bottom: 10px;">
Commits:
</h4>
<ul>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/286607a4422265ff8fd81fa58375944deb7b952b" style="color: #1068bf;">286607a4</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-12-14T23:53:52-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>hadrian: Don't enable TSAN in stage0 build
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f16b5e059d871d41e9928b26662713871fcf46c2" style="color: #1068bf;">f16b5e05</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-12-14T23:53:52-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>cmm: Introduce blockConcat
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4689f25bea87970698cc39ca838f9a0ecb4eed68" style="color: #1068bf;">4689f25b</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-12-14T23:53:52-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>cmm: Introduce MemoryOrderings
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6e3695532951312f6b17bc2cdad2b11e9ebe5131" style="color: #1068bf;">6e369553</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-12-14T23:53:52-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>llvm: Respect memory specified orderings
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eab018d6ffa44341b0d0fbbd270785c56f6145d0" style="color: #1068bf;">eab018d6</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-12-14T23:53:52-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Codegen/x86: Eliminate barrier for relaxed accesses
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c069fb53824281f3bd6c3fd3aec5767889305db4" style="color: #1068bf;">c069fb53</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-12-14T23:53:52-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>cmm/Parser: Reduce some repetition
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/12b08543c6586c6fe4cafe2a533cae74a1598fe4" style="color: #1068bf;">12b08543</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-12-14T23:53:52-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>cmm/Parser: Add syntax for ordered loads and stores
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a6422e8843784c43293bcec33eac4c5a2362db98" style="color: #1068bf;">a6422e88</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-12-14T23:53:52-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>cmm/Parser: Atomic load syntax
Originally I had thought I would just use the `prim` call syntax instead
of introducing new syntax for atomic loads. However, it turns out that
`prim` call syntax tends to make things quite unreadable. This new
syntax seems quite natural.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5731e5b315e2ffb24ff4459cfdcf7feca93c0fe4" style="color: #1068bf;">5731e5b3</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-12-14T23:53:52-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>codeGen: Introduce ThreadSanitizer instrumentation
This introduces a new Cmm pass which instruments the program with
ThreadSanitizer annotations, allowing full tracking of mutator memory
accesses via TSAN.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b5f29ee4d664cd3be1e0079d8d6e6e367f53915d" style="color: #1068bf;">b5f29ee4</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-12-14T23:53:52-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Hadrian: Drop TSAN_ENABLED define from flavour
This is redundant since the TSANUtils.h already defines it.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/266d80129f81bc9a992eda92425cfa6b51248d47" style="color: #1068bf;">266d8012</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-12-14T23:53:52-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>hadrian: Enable Cmm instrumentation in TSAN flavour
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5db5a1dd9b59754430f2b6fc823b2540f0a593b8" style="color: #1068bf;">5db5a1dd</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-12-14T23:53:53-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>rts: Ensure that global regs are never passed as fun call args
This is in general unsafe as they may be clobbered if they are mapped to
caller-saved machine registers. See Note [Register parameter passing].
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c9dc767613010512fdc08892d97a585572985731" style="color: #1068bf;">c9dc7676</a></strong>
<div>
<span> by Matthew Pickering </span> <i> at 2022-12-14T23:53:53-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Package Imports: Get candidate packages also from re-exported modules
Previously we were just looking at the direct imports to try and work
out what a package qualifier could apply to but #22333 pointed out we
also needed to look for reexported modules.
Fixes #22333
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/93e6c6448272bbe1c8d1f60625b15d4a87795c7a" style="color: #1068bf;">93e6c644</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2022-12-14T23:53:54-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>compiler: Ensure that MutVar operations have necessary barriers
Here we add acquire and release barriers in readMutVar# and
writeMutVar#, which are necessary for soundness.
Fixes #22468.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/659a55b4e33985bdd5e804bb452476f185df69ff" style="color: #1068bf;">659a55b4</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2022-12-14T23:53:54-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Fix bogus test in Lint
The Lint check for branch compatiblity within an axiom, in
GHC.Core.Lint.compatible_branches was subtly different to the
check made when contructing an axiom, in
GHC.Core.FamInstEnv.compatibleBranches.
The latter is correct, so I killed the former and am now using the
latter.
On the way I did some improvements to pretty-printing and documentation.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ee45fd9521be13104be1dc752f1474794a8585fe" style="color: #1068bf;">ee45fd95</a></strong>
<div>
<span> by Ryan Scott </span> <i> at 2022-12-14T23:53:55-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "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: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>checkValidInst: Don't expand synonyms when splitting sigma types
Previously, the `checkValidInst` function (used when checking that an instance
declaration is headed by an actual type class, not a type synonym) was using
`tcSplitSigmaTy` to split apart the `forall`s and instance context. This is
incorrect, however, as `tcSplitSigmaTy` expands type synonyms, which can cause
instances headed by quantified constraint type synonyms to be accepted
erroneously.
This patch introduces `splitInstTyForValidity`, a variant of `tcSplitSigmaTy`
specialized for validity checking that does _not_ expand type synonyms, and
uses it in `checkValidInst`.
Fixes #22570.
</pre>
</li>
</ul>
<h4 style="margin-top: 10px; margin-bottom: 10px;">
30 changed files:
</h4>
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<li class="file-stats">
<a href="#4be740ae89a8f621d7bcec7f85788c767929c322" style="color: #1068bf;">
compiler/GHC/Cmm/Config.hs
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<a href="#359dccbd5e329f4f4f3c88b6d43f0ad5dd435fe3" style="color: #1068bf;">
compiler/GHC/Cmm/ContFlowOpt.hs
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<a href="#eae45922f6e633780395508f44c14a5ed7959e7a" style="color: #1068bf;">
compiler/GHC/Cmm/Dataflow/Block.hs
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<a href="#e9c044b79842eca94ef683d075c4bfeca3bbb931" style="color: #1068bf;">
compiler/GHC/Cmm/Lexer.x
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<a href="#c898e00d01234ab22d3b485be68db3645f52f220" style="color: #1068bf;">
compiler/GHC/Cmm/MachOp.hs
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<a href="#71e696f452eb493722d70306c6f304fc9b2f6a95" style="color: #1068bf;">
compiler/GHC/Cmm/Parser.y
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<li class="file-stats">
<a href="#d40f34584a7f4c0fa7587fb41f94a34bca0d1064" style="color: #1068bf;">
compiler/GHC/Cmm/Pipeline.hs
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<a href="#194e2602b82bb08fd31c3028aace1da113aae36f" style="color: #1068bf;">
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compiler/GHC/Cmm/ThreadSanitizer.hs
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<li class="file-stats">
<a href="#6997a0cd37829d3d08db1c48185aaa3d7dfc3e6b" style="color: #1068bf;">
compiler/GHC/CmmToAsm/AArch64/CodeGen.hs
</a>
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<a href="#f71fa75baa7807186473f09c45a9ada1b72f4c6c" style="color: #1068bf;">
compiler/GHC/CmmToAsm/PPC/CodeGen.hs
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<a href="#94b86a17d123043012c2097c7c9559de28d86ad6" style="color: #1068bf;">
compiler/GHC/CmmToAsm/Wasm/FromCmm.hs
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<li class="file-stats">
<a href="#2bae5947e9412f6deebf4db7dcb89d780913130f" style="color: #1068bf;">
compiler/GHC/CmmToAsm/X86/CodeGen.hs
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<li class="file-stats">
<a href="#76664ab267df4fc0bec2465efd78bf0afacfe3a7" style="color: #1068bf;">
compiler/GHC/CmmToC.hs
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compiler/GHC/Core/Coercion/Axiom.hs
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<a href="#91648438362e5a35363d2bb7abb04016dedd7d7e" style="color: #1068bf;">
compiler/GHC/Core/FamInstEnv.hs
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<a href="#36a42448a83a9d1f6df8475f03ead2eed199dd8e" style="color: #1068bf;">
compiler/GHC/Core/Lint.hs
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<a href="#e7f862bd494e0375ab936eec987ade1ccd64b43b" style="color: #1068bf;">
compiler/GHC/Driver/Config/Cmm.hs
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compiler/GHC/Driver/Flags.hs
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<a href="#774d88050336ef660c7a219fb06c480c2fc639bc" style="color: #1068bf;">
compiler/GHC/Driver/Session.hs
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compiler/GHC/StgToCmm/ExtCode.hs
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<a href="#d12a108e34fe83acc9c99357ae841e22a0af0a23" style="color: #1068bf;">
compiler/GHC/StgToCmm/Prim.hs
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<li class="file-stats">
<a href="#1db07ed8cd9bab6b217a8f5a140176d3cb8672fd" style="color: #1068bf;">
compiler/GHC/Tc/Validity.hs
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compiler/GHC/Unit/Finder.hs
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<a href="#fb39dbd5a18747427e8ae2c57dcdde3473e65a53" style="color: #1068bf;">
compiler/GHC/Unit/State.hs
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compiler/ghc.cabal.in
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<a href="#36435f993774454b5956f3a38a9276ed176c61cc" style="color: #1068bf;">
docs/users_guide/debugging.rst
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hadrian/src/Flavour.hs
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<a href="#c295ca8b90dc6b200fb3e0cbd3dfdc5df307bbc7" style="color: #1068bf;">
rts/HeapStackCheck.cmm
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