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<h3 style="margin-top: 20px; margin-bottom: 10px;">
Apoorv Ingle pushed to branch wip/T21909 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: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b56025f448646de40446a133f140f62c8a49cabf">b56025f4</a></strong>
<div>
<span> by Gergő Érdi </span> <i> at 2023-02-27T13:34:22+00:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "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;'>Don't specialise incoherent instance applications
Using incoherent instances, there can be situations where two
occurrences of the same overloaded function at the same type use two
different instances (see #22448). For incoherently resolved instances,
we must mark them with `nospec` to avoid the specialiser rewriting one
to the other. This marking is done during the desugaring of the
`WpEvApp` wrapper.
Fixes #22448
Metric Increase:
T15304
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d0c7bbedb741e6bf947bcdc0e097070242ab56e1">d0c7bbed</a></strong>
<div>
<span> by Tom Ellis </span> <i> at 2023-02-27T20:04:07-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "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;'>Fix SCC grouping example
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f84a8cd428759e0cc413ac49a51cf7545ea2be30">f84a8cd4</a></strong>
<div>
<span> by Bryan Richter </span> <i> at 2023-02-28T05:58:37-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "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;'>Mark setnumcapabilities001 fragile
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/29a04d6e6e999bf907ba01ea0cb2f3af9f76f558">29a04d6e</a></strong>
<div>
<span> by Bryan Richter </span> <i> at 2023-02-28T05:58:37-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "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;'>Allow nightly-x86_64-linux-deb10-validate+thread_sanitizer to fail
See #22520
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9fa545722f9151781344446dd5501db38cb90dd1">9fa54572</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-02-28T05:59:15-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "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;'>ghc-prim: fix hs_cmpxchg64 function prototype
hs_cmpxchg64 must return a StgWord64, otherwise incorrect runtime
results of 64-bit MO_Cmpxchg will appear in 32-bit unregisterised
builds, which go unnoticed at compile-time due to C implicit casting
in .hc files.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0c200ab78c814cb5d1efaf426f0d3d91ceab9f4d">0c200ab7</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2023-02-28T11:10:31-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "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;'>Account for local rules in specImports
As #23024 showed, in GHC.Core.Opt.Specialise.specImports, we were
generating specialisations (a locally-define function) for imported
functions; and then generating specialisations for those
locally-defined functions. The RULE for the latter should be
attached to the local Id, not put in the rules-for-imported-ids
set.
Fix is easy; similar to what happens in GHC.HsToCore.addExportFlagsAndRules
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8b77f9bfceb456115f63349ad0ff66a5cea7ab59">8b77f9bf</a></strong>
<div>
<span> by Sylvain Henry </span> <i> at 2023-02-28T11:11:21-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "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: fix for overlap with copyMutableByteArray# (#23033)
The code wasn't taking into account some kind of overlap.
cgrun070 has been extended to test the missing case.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/239202a2b14714740e016d7bbcd4f351356fcb00">239202a2</a></strong>
<div>
<span> by Sylvain Henry </span> <i> at 2023-02-28T11:12:03-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "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;'>Testsuite: replace some js_skip with req_cmm
req_cmm is more informative than js_skip
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/42dac9ef24ff1f7486ddae3c6429b2ca7c2802ae">42dac9ef</a></strong>
<div>
<span> by Apoorv Ingle </span> <i> at 2023-02-28T17:50:32+00:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "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;'>Constraint simplification loop now depends on `ExpansionFuel`
instead of a boolean flag for `CDictCan.cc_pend_sc`.
Pending givens get a fuel of 3 while Wanted and quantified constraints get a fuel of 1.
This helps pending given constraints to keep up with pending wanted constraints in case of
`UndecidableSuperClasses` and superclass expansions while simplifying the infered type.
Adds 3 dynamic flags for controlling the fuels for each type of constraints
`-fgivens-expansion-fuel` for givens `-fwanteds-expansion-fuel` for wanteds and `-fqcs-expansion-fuel` for quantified constraints
Fixes #21909
Added Tests T21909, T21909b
Added Note [SimplifyInfer and UndecidableSuperClasses]
</pre>
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compiler/GHC/HsToCore.hs
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