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<h3>

 Marge Bot pushed to branch master

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/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890">a9ae83af</a></strong>

<div>

<span>by Krzysztof Gogolewski</span>

<i>at 2020-10-02T08:00:25-04:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix typos in comments

[skip ci]

</pre>

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</ul>

<h4>29 changed files:</h4>

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<a href="#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77">

compiler/GHC/Builtin/Names.hs

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<li class="file-stats">

<a href="#451725cc4e5d443a3b7c2adcdf224840f953b7e2">

compiler/GHC/Builtin/primops.txt.pp

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<a href="#10b61652f9817945bb54ccf8fc40f8a664ca3c30">

compiler/GHC/CmmToAsm.hs

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<a href="#5596bb0f228bd2a308c4391df97375ae879430a8">

compiler/GHC/Core/InstEnv.hs

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<a href="#36a42448a83a9d1f6df8475f03ead2eed199dd8e">

compiler/GHC/Core/Lint.hs

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<a href="#35cff95f9f44690fc50b44bbe8ac3c554c7d5a5e">

compiler/GHC/Core/Make.hs

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<a href="#2f46b19cb85e3f7b4e72305644bc50015628c41d">

compiler/GHC/Core/Opt/Simplify/Env.hs

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<a href="#ab22d7ae4d245581b701367e386d7e886e416e76">

compiler/GHC/Core/Opt/Specialise.hs

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<a href="#578c7c3857d66d963736ff6742f3433a0e8d01b7">

compiler/GHC/Core/TyCo/Rep.hs

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<a href="#1a7aba0daeafab195716dd25432479804a55ab60">

compiler/GHC/Core/Utils.hs

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<a href="#99771528d6dbafffa79f4900ea74e7d5ec76800c">

compiler/GHC/CoreToByteCode.hs

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<a href="#774d88050336ef660c7a219fb06c480c2fc639bc">

compiler/GHC/Driver/Session.hs

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<a href="#f2b2b84d138b362920ab9f144f58bf16254aab64">

compiler/GHC/Iface/Type.hs

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<a href="#897218b3e24728ae9e5b0329b949493f1ede80fb">

compiler/GHC/Tc/Errors/Hole.hs

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<a href="#6a1f039ed7725eddef15dd5f4dc318a3434f26c9">

compiler/GHC/Tc/Gen/App.hs

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<a href="#73cf7ada7d008f315e18676ed83f3a566fbbe679">

compiler/GHC/Tc/Gen/Export.hs

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<a href="#36920f1fa315563c590243b1b096096bc305ca70">

compiler/GHC/Tc/Gen/Head.hs

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<a href="#aebe2c3d616f6843166d2657bed048898add6bc9">

compiler/GHC/Tc/Instance/Class.hs

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<a href="#e65390fa5a32c453a81a1c9a3e1c4464d155ca4a">

compiler/GHC/Tc/Module.hs

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<a href="#f639b0b31b7245cb7d34ac190b798f5ec1c7da2e">

compiler/GHC/Tc/Solver/Interact.hs

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<a href="#2eac51f9871ca0c0698aa1fc7f79c05ef8fc4a49">

compiler/GHC/ThToHs.hs

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<a href="#261c0c5029eb34eb7436b087d77314f377ff8223">

compiler/GHC/Types/Id/Make.hs

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<a href="#18b2d73a5951d93c536faf471580e620f462867b">

docs/users_guide/flags.py

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<a href="#484e50173b324b5842d294580ec9ed8a7b0d5d38">

libraries/base/GHC/Conc/Sync.hs

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<a href="#613eb2a1c706c7ea57be637d2c8ed135d1d2af29">

libraries/base/GHC/TypeNats.hs

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<a href="#98b46afb652ad9b66a276d3c312d1262c3838642">

libraries/base/Unsafe/Coerce.hs

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<a href="#24275227d2bf375fcdf395e9e895a83bf8c86491">

libraries/ghc-prim/GHC/Prim/Ext.hs

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<a href="#156cc2660393f1d1fc85c7add1ed2dbebe4ed154">

testsuite/tests/typecheck/should_fail/T18357b.hs

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<a href="#9f8e1cdb633f79039d0792275510ccf1d8cf8d32">

utils/genprimopcode/Main.hs

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<h4>Changes:</h4>

<li id="0887cf39c5cdf9cf8d6758f410d7dab3023c0d77">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77"><strong>compiler/GHC/Builtin/Names.hs</strong></a>

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<table class="code white" style="font-family: monospace; font-size: 90%;" bgcolor="#fff" width="100%" cellpadding="0" cellspacing="0">

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1668" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1668" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1668,7 +1668,7 @@ datatypeClassKey    = mkPreludeClassUnique 39</td>

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<td class="diff-line-num old_line" data-linenumber="1668" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="1668" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1668" class="line" lang="haskell"><span class="n" style="color: #333;">constructorClassKey</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPreludeClassUnique</span> <span class="mi" style="color: #099;">40</span></span>

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<td class="diff-line-num old_line" data-linenumber="1669" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="1669" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1669" class="line" lang="haskell"><span class="n" style="color: #333;">selectorClassKey</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPreludeClassUnique</span> <span class="mi" style="color: #099;">41</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1670" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="1670" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1670" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1671" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1671

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<td class="diff-line-num new_line old" data-linenumber="1671" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1671" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- KnownNat: see Note [KnowNat & KnownSymbol and EvLit] in GHC.Tc.Types.Evidence</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1672" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1671" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC1671" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- KnownNat: see Note [Know<span class="idiff left right">n</span>Nat & KnownSymbol and EvLit] in GHC.Tc.Types.Evidence</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1672" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="1672" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1672" class="line" lang="haskell"><span class="n" style="color: #333;">knownNatClassNameKey</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Unique</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1673" class="line" lang="haskell"><span class="n" style="color: #333;">knownNatClassNameKey</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPreludeClassUnique</span> <span class="mi" style="color: #099;">42</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1674" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1674" class="line" lang="haskell"></span>

</pre>

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<br>

</li>

<li id="451725cc4e5d443a3b7c2adcdf224840f953b7e2">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#451725cc4e5d443a3b7c2adcdf224840f953b7e2"><strong>compiler/GHC/Builtin/primops.txt.pp</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="163" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -163,7 +163,7 @@ defaults</td>

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<pre style="margin: 0;"> <span id="LC163" class="line" lang="puppet"><span class="o" style="font-weight: 600;">--</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="164" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="164" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC164" class="line" lang="puppet"><span class="o" style="font-weight: 600;">--</span> <span class="nc" style="color: #458; font-weight: 600;">Unfortunately</span><span class="p">,</span> <span class="n" style="color: #333;">for</span> <span class="n" style="color: #333;">the</span> <span class="n" style="color: #333;">time</span> <span class="n" style="color: #333;">being</span> <span class="n" style="color: #333;">most</span> <span class="n" style="color: #333;">of</span> <span class="n" style="color: #333;">the</span> <span class="n" style="color: #333;">primops</span> <span class="n" style="color: #333;">which</span> <span class="n" style="color: #333;">should</span> <span class="n" style="color: #333;">be</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC165" class="line" lang="puppet"><span class="o" style="font-weight: 600;">--</span> <span class="n" style="color: #333;">moved</span> <span class="n" style="color: #333;">according</span> <span class="n" style="color: #333;">to</span> <span class="n" style="color: #333;">the</span> <span class="n" style="color: #333;">previous</span> <span class="n" style="color: #333;">paragraph</span> <span class="n" style="color: #333;">can</span><span class="s1" style="color: #d14;">'t yet. There are some</span></span>

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166

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<pre style="margin: 0;">-<span id="LC166" class="line" lang="puppet"><span class="s1" style="color: #d14;">-- superficial restrictions in `foreign import prim` which mus be fixed</span></span>

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<pre style="margin: 0;">+<span id="LC166" class="line" lang="puppet"><span class="s1" style="color: #d14;">-- superficial restrictions in `foreign import prim` which mus<span class="idiff left right">t</span> be fixed</span></span>

</pre>

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167

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167

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<pre style="margin: 0;"> <span id="LC167" class="line" lang="puppet"><span class="s1" style="color: #d14;">-- first. Specifically, `foreign import prim` always requires:</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="168" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

168

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<pre style="margin: 0;"> <span id="LC168" class="line" lang="puppet"><span class="s1" style="color: #d14;">--</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="169" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

169

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169

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<pre style="margin: 0;"> <span id="LC169" class="line" lang="puppet"><span class="s1" style="color: #d14;">--   - No polymorphism in type</span></span>

</pre>

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</li>

<li id="10b61652f9817945bb54ccf8fc40f8a664ca3c30">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#10b61652f9817945bb54ccf8fc40f8a664ca3c30"><strong>compiler/GHC/CmmToAsm.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1174" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1174" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1174,7 +1174,7 @@ initNCGConfig dflags = NCGConfig</td>

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1174

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1174

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<pre style="margin: 0;"> <span id="LC1174" class="line" lang="haskell">                                 <span class="kt" style="color: #458; font-weight: 600;">ArchX86</span>    <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">bmiVersion</span> <span class="n" style="color: #333;">dflags</span></span>

</pre>

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1175

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<td class="diff-line-num new_line" data-linenumber="1175" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1175

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<pre style="margin: 0;"> <span id="LC1175" class="line" lang="haskell">                                 <span class="kr" style="font-weight: 600;">_</span>          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1176" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1176

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1176

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<pre style="margin: 0;"> <span id="LC1176" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1177" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1177

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<pre style="margin: 0;">-<span id="LC1177" class="line" lang="haskell">     <span class="c1" style="color: #998; font-style: italic;">-- We <span class="idiff left right">A</span>ssume  SSE1 and SSE2 operations are available on both</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1178" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1177" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1177

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<pre style="margin: 0;">+<span id="LC1177" class="line" lang="haskell">     <span class="c1" style="color: #998; font-style: italic;">-- We <span class="idiff left right">a</span>ssume  SSE1 and SSE2 operations are available on both</span></span>

</pre>

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1178

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<td class="diff-line-num new_line" data-linenumber="1178" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1178

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<pre style="margin: 0;"> <span id="LC1178" class="line" lang="haskell">     <span class="c1" style="color: #998; font-style: italic;">-- x86 and x86_64. Historically we didn't default to SSE2 and</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1179" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1179

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<td class="diff-line-num new_line" data-linenumber="1179" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1179

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<pre style="margin: 0;"> <span id="LC1179" class="line" lang="haskell">     <span class="c1" style="color: #998; font-style: italic;">-- SSE1 on x86, which results in defacto nondeterminism for how</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1180

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<td class="diff-line-num new_line" data-linenumber="1180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1180

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<pre style="margin: 0;"> <span id="LC1180" class="line" lang="haskell">     <span class="c1" style="color: #998; font-style: italic;">-- rounding behaves in the associated x87 floating point instructions</span></span>

</pre>

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</li>

<li id="5596bb0f228bd2a308c4391df97375ae879430a8">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#5596bb0f228bd2a308c4391df97375ae879430a8"><strong>compiler/GHC/Core/InstEnv.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="234" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="234" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -234,7 +234,7 @@ pprInstances :: [ClsInst] -> SDoc</td>

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<pre style="margin: 0;"> <span id="LC234" class="line" lang="haskell"><span class="n" style="color: #333;">pprInstances</span> <span class="n" style="color: #333;">ispecs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">vcat</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">pprInstance</span> <span class="n" style="color: #333;">ispecs</span><span class="p">)</span></span>

</pre>

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235

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<td class="diff-line-num new_line" data-linenumber="235" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

235

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<pre style="margin: 0;"> <span id="LC235" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC236" class="line" lang="haskell"><span class="n" style="color: #333;">instanceHead</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ClsInst</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">TyVar</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">Class</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">])</span></span>

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<pre style="margin: 0;">-<span id="LC237" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Returns the head, using the fresh ty<span class="idiff left right">av</span>s from the ClsInst</span></span>

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<pre style="margin: 0;">+<span id="LC237" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Returns the head, using the fresh ty<span class="idiff left right">var</span>s from the ClsInst</span></span>

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238

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<pre style="margin: 0;"> <span id="LC238" class="line" lang="haskell"><span class="n" style="color: #333;">instanceHead</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ClsInst</span> <span class="p">{</span> <span class="n" style="color: #333;">is_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tvs</span><span class="p">,</span> <span class="n" style="color: #333;">is_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tys</span><span class="p">,</span> <span class="n" style="color: #333;">is_dfun</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dfun</span> <span class="p">})</span></span>

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239

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239

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<pre style="margin: 0;"> <span id="LC239" class="line" lang="haskell">   <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">tvs</span><span class="p">,</span> <span class="n" style="color: #333;">cls</span><span class="p">,</span> <span class="n" style="color: #333;">tys</span><span class="p">)</span></span>

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240

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240

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<pre style="margin: 0;"> <span id="LC240" class="line" lang="haskell">   <span class="kr" style="font-weight: 600;">where</span></span>

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<li id="36a42448a83a9d1f6df8475f03ead2eed199dd8e">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#36a42448a83a9d1f6df8475f03ead2eed199dd8e"><strong>compiler/GHC/Core/Lint.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="178" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="178" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -178,7 +178,7 @@ in GHC.Core.Opt.WorkWrap.Utils.  (Maybe there are other "clients" of this featur</td>

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178

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<pre style="margin: 0;"> <span id="LC178" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  might reject a correct program.  So we carry a type substitution (in</span></span>

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179

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<pre style="margin: 0;"> <span id="LC179" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  this example [a -> Bool]) and apply this substitution before</span></span>

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<pre style="margin: 0;"> <span id="LC180" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  comparing types. In effect, in Lint, type equality is always</span></span>

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<pre style="margin: 0;">-<span id="LC181" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  equality-modu<span class="idiff left right">o</span>lo-le-subst.  This is in the le_subst field of</span></span>

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<pre style="margin: 0;">+<span id="LC181" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  equality-modulo-le-subst.  This is in the le_subst field of</span></span>

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<pre style="margin: 0;"> <span id="LC182" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  LintEnv.  But nota bene:</span></span>

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<pre style="margin: 0;"> <span id="LC183" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC184" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  (SI1) The le_subst substitution is applied to types and coercions only</span></span>

</pre>

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<li id="35cff95f9f44690fc50b44bbe8ac3c554c7d5a5e">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#35cff95f9f44690fc50b44bbe8ac3c554c7d5a5e"><strong>compiler/GHC/Core/Make.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="940" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="940" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -940,7 +940,7 @@ We use aBSENT_ERROR_ID to build dummy values in workers.  E.g.</td>

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940

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940

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<pre style="margin: 0;"> <span id="LC940" class="line" lang="haskell"></span>

</pre>

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941

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941

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<pre style="margin: 0;"> <span id="LC941" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   f x = (case x of (a,b) -> b) + 1::Int</span></span>

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942

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942

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<pre style="margin: 0;"> <span id="LC942" class="line" lang="haskell"></span>

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943

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<pre style="margin: 0;">-<span id="LC943" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The demand analyser figures ot that only the second component of x is</span></span>

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943

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<pre style="margin: 0;">+<span id="LC943" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The demand analyser figures o<span class="idiff left right">u</span>t that only the second component of x is</span></span>

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944

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<pre style="margin: 0;"> <span id="LC944" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">used, and does a w/w split thus</span></span>

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945

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<pre style="margin: 0;"> <span id="LC945" class="line" lang="haskell"></span>

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946

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<pre style="margin: 0;"> <span id="LC946" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   f x = case x of (a,b) -> $wf b</span></span>

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<li id="2f46b19cb85e3f7b4e72305644bc50015628c41d">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#2f46b19cb85e3f7b4e72305644bc50015628c41d"><strong>compiler/GHC/Core/Opt/Simplify/Env.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="809" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -809,7 +809,7 @@ subst_id_bndr env@(SimplEnv { seInScope = in_scope, seIdSubst = id_subst })</td>

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<pre style="margin: 0;"> <span id="LC809" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isCoVar</span> <span class="n" style="color: #333;">old_id</span><span class="p">),</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">old_id</span> <span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC810" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">env</span> <span class="p">{</span> <span class="n" style="color: #333;">seInScope</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">in_scope</span> <span class="p">`</span><span class="n" style="color: #333;">extendInScopeSet</span><span class="p">`</span> <span class="n" style="color: #333;">new_id</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC811" class="line" lang="haskell">           <span class="n" style="color: #333;">seIdSubst</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">new_subst</span> <span class="p">},</span> <span class="n" style="color: #333;">new_id</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC812" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- It's important that both seInScope and seIdSubt are updated with</span></span>

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<pre style="margin: 0;">+<span id="LC812" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- It's important that both seInScope and seIdSub<span class="idiff left right">s</span>t are updated with</span></span>

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<pre style="margin: 0;"> <span id="LC813" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- the new_id, /after/ applying adjust_type. That's why adjust_type</span></span>

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<pre style="margin: 0;"> <span id="LC814" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- is done here.  If we did adjust_type in simplJoinBndr (the only</span></span>

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<pre style="margin: 0;"> <span id="LC815" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- place that gives a non-identity adjust_type) we'd have to fiddle</span></span>

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<li id="ab22d7ae4d245581b701367e386d7e886e416e76">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#ab22d7ae4d245581b701367e386d7e886e416e76"><strong>compiler/GHC/Core/Opt/Specialise.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="946" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -946,7 +946,7 @@ and we get a loop!</td>

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<pre style="margin: 0;"> <span id="LC946" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [specImport call stack]</span></span>

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<pre style="margin: 0;"> <span id="LC947" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

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<pre style="margin: 0;"> <span id="LC948" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When specialising an imports function 'f', we may get new calls</span></span>

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<pre style="margin: 0;">-<span id="LC949" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">of an imported fuction 'g', which we want to specialise in turn,</span></span>

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<pre style="margin: 0;">+<span id="LC949" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">of an imported fu<span class="idiff left right">n</span>ction 'g', which we want to specialise in turn,</span></span>

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<pre style="margin: 0;"> <span id="LC950" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and similarly specialising 'g' might expose a new call to 'h'.</span></span>

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<pre style="margin: 0;"> <span id="LC951" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC952" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We track the stack of enclosing functions. So when specialising 'h' we</span></span>

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<li id="578c7c3857d66d963736ff6742f3433a0e8d01b7">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#578c7c3857d66d963736ff6742f3433a0e8d01b7"><strong>compiler/GHC/Core/TyCo/Rep.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2032" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2032,7 +2032,7 @@ GHC.Core.Multiplicity above this module.</td>

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<pre style="margin: 0;"> <span id="LC2032" class="line" lang="haskell"><span class="cd">-- | A shorthand for data with an attached 'Mult' element (the multiplicity).</span></span>

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<pre style="margin: 0;"> <span id="LC2033" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">Scaled</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Scaled</span> <span class="kt" style="color: #458; font-weight: 600;">Mult</span> <span class="n" style="color: #333;">a</span></span>

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<pre style="margin: 0;"> <span id="LC2034" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">deriving</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Data</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Data</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC2035" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- You might think that this would be a natural candiate for</span></span>

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<pre style="margin: 0;">+<span id="LC2035" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- You might think that this would be a natural candi<span class="idiff left right">d</span>ate for</span></span>

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<pre style="margin: 0;"> <span id="LC2036" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- Functor, Traversable but Krzysztof says (!3674) "it was too easy</span></span>

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<pre style="margin: 0;"> <span id="LC2037" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- to accidentally lift functions (substitutions, zonking etc.) from</span></span>

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2038

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<pre style="margin: 0;"> <span id="LC2038" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- Type -> Type to Scaled Type -> Scaled Type, ignoring</span></span>

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<li id="1a7aba0daeafab195716dd25432479804a55ab60">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#1a7aba0daeafab195716dd25432479804a55ab60"><strong>compiler/GHC/Core/Utils.hs</strong></a>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="604" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -604,7 +604,7 @@ which allows only (Coercion co) on the RHS.</td>

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<pre style="margin: 0;"> <span id="LC604" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC605" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>

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<pre style="margin: 0;"> <span id="LC606" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>

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<pre style="margin: 0;">-<span id="LC607" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">               Operations oer case alternatives</span></span>

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<pre style="margin: 0;">+<span id="LC607" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">               Operations o<span class="idiff left right">v</span>er case alternatives</span></span>

</pre>

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608

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608

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<pre style="margin: 0;"> <span id="LC608" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="609" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

609

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<td class="diff-line-num new_line" data-linenumber="609" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

609

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<pre style="margin: 0;"> <span id="LC609" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="610" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

610

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<td class="diff-line-num new_line" data-linenumber="610" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

610

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<pre style="margin: 0;"> <span id="LC610" class="line" lang="haskell"></span>

</pre>

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<br>

</li>

<li id="99771528d6dbafffa79f4900ea74e7d5ec76800c">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#99771528d6dbafffa79f4900ea74e7d5ec76800c"><strong>compiler/GHC/CoreToByteCode.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="625" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="625" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -625,7 +625,7 @@ schemeE d s p exp@(AnnTick (Breakpoint _id _fvs) _rhs)</td>

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625

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625

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<pre style="margin: 0;"> <span id="LC625" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">--    match = /\(r::RuntimeRep) /\(a::TYPE r).</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="626" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

626

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<td class="diff-line-num new_line" data-linenumber="626" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

626

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<pre style="margin: 0;"> <span id="LC626" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">--            \(k :: Int -> a) \(v::T).</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="627" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

627

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<td class="diff-line-num new_line" data-linenumber="627" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

627

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<pre style="margin: 0;"> <span id="LC627" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">--            case v of MkV n -> k n</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="628" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

628

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<td class="diff-line-num new_line old" data-linenumber="628" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC628" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- Here (k n) :: a :: T<span class="idiff left right">ype</span> r, so we don't know if it's lifted</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="629" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="628" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

628

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<pre style="margin: 0;">+<span id="LC628" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- Here (k n) :: a :: T<span class="idiff left right">YPE</span> r, so we don't know if it's lifted</span></span>

</pre>

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629

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<td class="diff-line-num new_line" data-linenumber="629" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

629

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<pre style="margin: 0;"> <span id="LC629" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- or not; but that should be fine provided we add that void arg.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="630" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

630

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<td class="diff-line-num new_line" data-linenumber="630" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

630

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<pre style="margin: 0;"> <span id="LC630" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="631" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

631

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<td class="diff-line-num new_line" data-linenumber="631" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

631

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<pre style="margin: 0;"> <span id="LC631" class="line" lang="haskell">          <span class="n" style="color: #333;">id</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newId</span> <span class="p">(</span><span class="n" style="color: #333;">mkVisFunTyMany</span> <span class="n" style="color: #333;">realWorldStatePrimTy</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span></span>

</pre>

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<br>

</li>

<li id="774d88050336ef660c7a219fb06c480c2fc639bc">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#774d88050336ef660c7a219fb06c480c2fc639bc"><strong>compiler/GHC/Driver/Session.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="4910" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="4910" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -4910,7 +4910,7 @@ isSseEnabled platform = case platformArch platform of</td>

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4910

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<td class="diff-line-num new_line" data-linenumber="4910" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4910

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<pre style="margin: 0;"> <span id="LC4910" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="4911" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4911

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<td class="diff-line-num new_line" data-linenumber="4911" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4911

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<pre style="margin: 0;"> <span id="LC4911" class="line" lang="haskell"><span class="n" style="color: #333;">isSse2Enabled</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Platform</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="4912" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4912

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<td class="diff-line-num new_line" data-linenumber="4912" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4912

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<pre style="margin: 0;"> <span id="LC4912" class="line" lang="haskell"><span class="n" style="color: #333;">isSse2Enabled</span> <span class="n" style="color: #333;">platform</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">platformArch</span> <span class="n" style="color: #333;">platform</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="4913" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4913

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<td class="diff-line-num new_line old" data-linenumber="4913" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC4913" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- We <span class="idiff left right">A</span>ssume  SSE1 and SSE2 operations are available on both</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="4914" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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4913

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<pre style="margin: 0;">+<span id="LC4913" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- We <span class="idiff left right">a</span>ssume  SSE1 and SSE2 operations are available on both</span></span>

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<pre style="margin: 0;"> <span id="LC4914" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- x86 and x86_64. Historically we didn't default to SSE2 and</span></span>

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<pre style="margin: 0;"> <span id="LC4915" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- SSE1 on x86, which results in defacto nondeterminism for how</span></span>

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<pre style="margin: 0;"> <span id="LC4916" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- rounding behaves in the associated x87 floating point instructions</span></span>

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<li id="f2b2b84d138b362920ab9f144f58bf16254aab64">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#f2b2b84d138b362920ab9f144f58bf16254aab64"><strong>compiler/GHC/Iface/Type.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="987" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="987" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -987,7 +987,7 @@ mismatch between two skolems</td>

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<pre style="margin: 0;"> <span id="LC987" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We certainly don't want to say "Can't match LiftedRep ~ LiftedRep"!</span></span>

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<pre style="margin: 0;"> <span id="LC988" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC989" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">But if we are printing the type</span></span>

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<pre style="margin: 0;">-<span id="LC990" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (forall (a :: T<span class="idiff left right">ype</span> r). blah</span></span>

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<pre style="margin: 0;">+<span id="LC990" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (forall (a :: T<span class="idiff left right">YPE</span> r). blah</span></span>

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<pre style="margin: 0;"> <span id="LC991" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we do want to turn that (free) r into LiftedRep, so it prints as</span></span>

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<pre style="margin: 0;"> <span id="LC992" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (forall a. blah)</span></span>

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<pre style="margin: 0;"> <span id="LC993" class="line" lang="haskell"></span>

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<li id="897218b3e24728ae9e5b0329b949493f1ede80fb">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#897218b3e24728ae9e5b0329b949493f1ede80fb"><strong>compiler/GHC/Tc/Errors/Hole.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="601" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="601" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -601,7 +601,7 @@ findValidHoleFits tidy_env implics simples h@(Hole { hole_sort = ExprHole _</td>

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<pre style="margin: 0;"> <span id="LC601" class="line" lang="haskell">     <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"findingValidHoleFitsFor }"</span> <span class="n" style="color: #333;">empty</span></span>

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<pre style="margin: 0;"> <span id="LC602" class="line" lang="haskell">     <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">tidy_env</span><span class="p">,</span> <span class="n" style="color: #333;">vMsg</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">refMsg</span><span class="p">)</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC603" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">-<span id="LC604" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- We extract the type, the <span class="idiff left right">t</span>cLevel and the types free variables</span></span>

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<pre style="margin: 0;">+<span id="LC604" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- We extract the type, the <span class="idiff left right">T</span>cLevel and the types free variables</span></span>

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<pre style="margin: 0;"> <span id="LC605" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- from the constraint.</span></span>

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<pre style="margin: 0;"> <span id="LC606" class="line" lang="haskell">    <span class="n" style="color: #333;">hole_fvs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">FV</span></span>

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<pre style="margin: 0;"> <span id="LC607" class="line" lang="haskell">    <span class="n" style="color: #333;">hole_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyCoFVsOfType</span> <span class="n" style="color: #333;">hole_ty</span></span>

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<br>

</li>

<li id="6a1f039ed7725eddef15dd5f4dc318a3434f26c9">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#6a1f039ed7725eddef15dd5f4dc318a3434f26c9"><strong>compiler/GHC/Tc/Gen/App.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="196" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="196" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -196,7 +196,7 @@ tcApp works like this:</td>

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<pre style="margin: 0;"> <span id="LC196" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   The "list of arguments" is [HsExprArg], described in Note [HsExprArg].</span></span>

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<pre style="margin: 0;"> <span id="LC197" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   in GHC.Tc.Gen.Head</span></span>

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<pre style="margin: 0;"> <span id="LC198" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC199" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">2. Use tcInferAppHead to infer the type of the fuction,</span></span>

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<pre style="margin: 0;">+<span id="LC199" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">2. Use tcInferAppHead to infer the type of the fu<span class="idiff left right">n</span>ction,</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC200" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     as an (uninstantiated) TcSigmaType</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC201" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   There are special cases for</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC202" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     HsVar, HsRecFld, and ExprWithTySig</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="588" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="588" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -588,7 +588,7 @@ Consider (#15859)</td>

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<pre style="margin: 0;"> <span id="LC588" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC589" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  data A k :: k -> Type      -- A      :: forall k -> k -> Type</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC590" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  type KindOf (a :: k) = k   -- KindOf :: forall k. k -> Type</span></span>

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<pre style="margin: 0;">-<span id="LC591" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  a = (undefind :: KindOf A) @Int</span></span>

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<pre style="margin: 0;">+<span id="LC591" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  a = (undefin<span class="idiff left right">e</span>d :: KindOf A) @Int</span></span>

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<pre style="margin: 0;"> <span id="LC592" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC593" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">With ImpredicativeTypes (thin ice, I know), we instantiate</span></span>

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<pre style="margin: 0;"> <span id="LC594" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">KindOf at type (forall k -> k -> Type), so</span></span>

</pre>

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<li id="73cf7ada7d008f315e18676ed83f3a566fbbe679">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#73cf7ada7d008f315e18676ed83f3a566fbbe679"><strong>compiler/GHC/Tc/Gen/Export.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="579" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="579" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -579,7 +579,7 @@ lookupChildrenExport spec_parent rdr_items =</td>

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579

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579

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<pre style="margin: 0;"> <span id="LC579" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="580" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

580

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580

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<pre style="margin: 0;"> <span id="LC580" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Note: [Types of TyCon]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="581" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

581

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<td class="diff-line-num new_line" data-linenumber="581" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

581

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<pre style="margin: 0;"> <span id="LC581" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="582" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

582

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<td class="diff-line-num new_line old" data-linenumber="582" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC582" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This check appears to be overl<span class="idiff left right">l</span>y complicated, Richard asked why it</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="583" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="582" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

582

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<pre style="margin: 0;">+<span id="LC582" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This check appears to be overly complicated, Richard asked why it</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="583" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

583

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<td class="diff-line-num new_line" data-linenumber="583" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

583

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<pre style="margin: 0;"> <span id="LC583" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- is not simply just `isAlgTyCon`. The answer for this is that</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="584" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

584

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<td class="diff-line-num new_line" data-linenumber="584" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

584

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<pre style="margin: 0;"> <span id="LC584" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- a classTyCon is also an `AlgTyCon` which we explicitly want to disallow.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="585" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

585

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<td class="diff-line-num new_line" data-linenumber="585" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

585

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<pre style="margin: 0;"> <span id="LC585" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (It is either a newtype or data depending on the number of methods)</span></span>

</pre>

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<li id="36920f1fa315563c590243b1b096096bc305ca70">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#36920f1fa315563c590243b1b096096bc305ca70"><strong>compiler/GHC/Tc/Gen/Head.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="326" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="326" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -326,7 +326,7 @@ tcInferAppHead :: HsExpr GhcRn</td>

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326

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326

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<pre style="margin: 0;"> <span id="LC326" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Application chains and heads] in GHC.Tc.Gen.App</span></span>

</pre>

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327

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327

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<pre style="margin: 0;"> <span id="LC327" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We get back a /SigmaType/ because we have special cases for</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="328" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

328

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328

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<pre style="margin: 0;"> <span id="LC328" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   * A bare identifier (just look it up)</span></span>

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<td class="diff-line-num old old_line" data-linenumber="329" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

329

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<td class="diff-line-num new_line old" data-linenumber="329" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC329" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     This case also covers a record select<span class="idiff left right">ro</span> HsRecFld</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="330" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="329" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

329

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<pre style="margin: 0;">+<span id="LC329" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     This case also covers a record select<span class="idiff left right">or</span> HsRecFld</span></span>

</pre>

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330

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330

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<pre style="margin: 0;"> <span id="LC330" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   * An expression with a type signature (e :: ty)</span></span>

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331

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331

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<pre style="margin: 0;"> <span id="LC331" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Application chains and heads] in GHC.Tc.Gen.App</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="332" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

332

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<td class="diff-line-num new_line" data-linenumber="332" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

332

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<pre style="margin: 0;"> <span id="LC332" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<li id="aebe2c3d616f6843166d2657bed048898add6bc9">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#aebe2c3d616f6843166d2657bed048898add6bc9"><strong>compiler/GHC/Tc/Instance/Class.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -297,7 +297,7 @@ a more convenient function, defined in terms of `natSing`:</td>

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<pre style="margin: 0;"> <span id="LC297" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC298" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The reason we don't use this directly in the class is that it is simpler</span></span>

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<pre style="margin: 0;"> <span id="LC299" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and more efficient to pass around a Natural rather than an entire function,</span></span>

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<pre style="margin: 0;">-<span id="LC300" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">especially when the `KnowNat` evidence is packaged up in an existential.</span></span>

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<pre style="margin: 0;">+<span id="LC300" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">especially when the `Know<span class="idiff left right">n</span>Nat` evidence is packaged up in an existential.</span></span>

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<pre style="margin: 0;"> <span id="LC301" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC302" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The story for kind `Symbol` is analogous:</span></span>

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<pre style="margin: 0;"> <span id="LC303" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * class KnownSymbol</span></span>

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<li id="e65390fa5a32c453a81a1c9a3e1c4464d155ca4a">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#e65390fa5a32c453a81a1c9a3e1c4464d155ca4a"><strong>compiler/GHC/Tc/Module.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="301" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -301,7 +301,7 @@ tcRnModuleTcRnM hsc_env mod_sum</td>

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<pre style="margin: 0;"> <span id="LC301" class="line" lang="haskell">                        <span class="n" style="color: #333;">tcg_env</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">tcg_env</span></span>

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<pre style="margin: 0;"> <span id="LC302" class="line" lang="haskell">                                           <span class="p">{</span> <span class="n" style="color: #333;">tcg_doc_hdr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">maybe_doc_hdr</span> <span class="p">})</span></span>

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<pre style="margin: 0;"> <span id="LC303" class="line" lang="haskell">                      <span class="p">;</span> <span class="c1" style="color: #998; font-style: italic;">-- Report unused names</span></span>

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<pre style="margin: 0;">-<span id="LC304" class="line" lang="haskell">                        <span class="c1" style="color: #998; font-style: italic;">-- Do this /after/ typeinference, so that when reporting</span></span>

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<pre style="margin: 0;">+<span id="LC304" class="line" lang="haskell">                        <span class="c1" style="color: #998; font-style: italic;">-- Do this /after/ type<span class="idiff left right"> </span>inference, so that when reporting</span></span>

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<pre style="margin: 0;"> <span id="LC305" class="line" lang="haskell">                        <span class="c1" style="color: #998; font-style: italic;">-- a function with no type signature we can give the</span></span>

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<pre style="margin: 0;"> <span id="LC306" class="line" lang="haskell">                        <span class="c1" style="color: #998; font-style: italic;">-- inferred type</span></span>

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<pre style="margin: 0;"> <span id="LC307" class="line" lang="haskell">                        <span class="n" style="color: #333;">reportUnusedNames</span> <span class="n" style="color: #333;">tcg_env</span> <span class="n" style="color: #333;">hsc_src</span></span>

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<li id="f639b0b31b7245cb7d34ac190b798f5ec1c7da2e">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#f639b0b31b7245cb7d34ac190b798f5ec1c7da2e"><strong>compiler/GHC/Tc/Solver/Interact.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2606" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2606" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2606,7 +2606,7 @@ because many good things flow from [W] t1 ~# t2.</td>

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2606

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2606

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<pre style="margin: 0;"> <span id="LC2606" class="line" lang="haskell"></span>

</pre>

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2607

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<td class="diff-line-num new_line" data-linenumber="2607" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC2607" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The same reasoning applies to</span></span>

</pre>

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2608

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2608

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<pre style="margin: 0;"> <span id="LC2608" class="line" lang="haskell"></span>

</pre>

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2609

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<td class="diff-line-num new_line old" data-linenumber="2609" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2609" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* (~~)        heqTyC<span class="idiff left right">O</span>n</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2610" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC2609" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* (~~)        heqTyC<span class="idiff left right">o</span>n</span></span>

</pre>

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2610

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2610

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<pre style="margin: 0;"> <span id="LC2610" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* (~)         eqTyCon</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2611" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2611

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<pre style="margin: 0;"> <span id="LC2611" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Coercible   coercibleTyCon</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2612" class="line" lang="haskell"></span>

</pre>

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<li id="2eac51f9871ca0c0698aa1fc7f79c05ef8fc4a49">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#2eac51f9871ca0c0698aa1fc7f79c05ef8fc4a49"><strong>compiler/GHC/ThToHs.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1689" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1689" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1689,7 +1689,7 @@ points so that the code is readable with its original meaning.</td>

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1689

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1689

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<pre style="margin: 0;"> <span id="LC1689" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1690" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1690" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So scattered through "GHC.ThToHs" are various points where parens are added.</span></span>

</pre>

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1691

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1691

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<pre style="margin: 0;"> <span id="LC1691" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1692" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1692

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<td class="diff-line-num new_line old" data-linenumber="1692" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1692" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">See (among other closed issue<span class="idiff left right">d</span>) https://gitlab.haskell.org/ghc/ghc/issues/14289</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1692" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">See (among other closed issue<span class="idiff left right">s</span>) https://gitlab.haskell.org/ghc/ghc/issues/14289</span></span>

</pre>

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1693

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<td class="diff-line-num new_line" data-linenumber="1693" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1693

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<pre style="margin: 0;"> <span id="LC1693" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>

</pre>

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1694

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<pre style="margin: 0;"> <span id="LC1694" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ---------------------------------------------------------------------</span></span>

</pre>

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1695

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1695

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<pre style="margin: 0;"> <span id="LC1695" class="line" lang="haskell"></span>

</pre>

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<br>

</li>

<li id="261c0c5029eb34eb7436b087d77314f377ff8223">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#261c0c5029eb34eb7436b087d77314f377ff8223"><strong>compiler/GHC/Types/Id/Make.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1564,7 +1564,7 @@ Note [seqId magic]</td>

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1564

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<pre style="margin: 0;"> <span id="LC1564" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">a) Its fixity is set in GHC.Iface.Load.ghcPrimIface</span></span>

</pre>

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1565

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<pre style="margin: 0;"> <span id="LC1565" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1566" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">b) It has quite a bit of desugaring magic.</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC1567" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   See GHC.HsToCore.Utils Note [Desugaring seq<span class="idiff left right"> (1)]</span> and (2) and (3)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1567" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   See GHC.HsToCore.Utils Note [Desugaring seq<span class="idiff left right">] (1)</span> and (2) and (3)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1568" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1569" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">c) There is some special rule handing: Note [User-defined RULES for seq]</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1570" class="line" lang="haskell"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1748" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1748,7 +1748,7 @@ definition in Core.  The rewrite rule works as follows:</td>

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<pre style="margin: 0;"> <span id="LC1748" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  f (x `cast` co a) y</span></span>

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<pre style="margin: 0;"> <span id="LC1749" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1750" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The `co` coercion is the newtype-coercion extracted from the type-class.</span></span>

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<pre style="margin: 0;">-<span id="LC1751" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The type class is obtain by looking at the type of wrap.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1751" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The type class is obtain<span class="idiff left right">ed</span> by looking at the type of wrap.</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1752" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC1753" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC1754" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-------------------------------------------------------------</span></span>

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<br>

</li>

<li id="18b2d73a5951d93c536faf471580e620f462867b">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#18b2d73a5951d93c536faf471580e620f462867b"><strong>docs/users_guide/flags.py</strong></a>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="257" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -257,7 +257,7 @@ class LanguageExtension(GenericFlag):</td>

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<pre style="margin: 0;"> <span id="LC257" class="line" lang="python">    <span class="o" style="font-weight: 600;">@</span><span class="nb" style="color: #0086b3;">staticmethod</span></span>

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<pre style="margin: 0;"> <span id="LC258" class="line" lang="python">    <span class="k" style="font-weight: 600;">def</span> <span class="nf" style="color: #900; font-weight: 600;">_noname</span><span class="p">(</span><span class="n" style="color: #333;">name</span><span class="p">):</span></span>

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<pre style="margin: 0;"> <span id="LC259" class="line" lang="python">        <span class="c1" style="color: #998; font-style: italic;"># We check isupper() so that NondecreasingIndentation</span></span>

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<pre style="margin: 0;">-<span id="LC260" class="line" lang="python">        <span class="c1" style="color: #998; font-style: italic;"># is not counted as "No-decreasingIndentation"</span></span>

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<pre style="margin: 0;">+<span id="LC260" class="line" lang="python">        <span class="c1" style="color: #998; font-style: italic;"># is not counted as "No-<span class="idiff left right">n</span>decreasingIndentation"</span></span>

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<pre style="margin: 0;"> <span id="LC261" class="line" lang="python">        <span class="k" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">name</span><span class="p">[:</span><span class="mi" style="color: #099;">2</span><span class="p">]</span> <span class="o" style="font-weight: 600;">==</span> <span class="s" style="color: #d14;">"No"</span> <span class="ow" style="font-weight: 600;">and</span> <span class="n" style="color: #333;">name</span><span class="p">[</span><span class="mi" style="color: #099;">2</span><span class="p">].</span><span class="n" style="color: #333;">isupper</span><span class="p">():</span></span>

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<pre style="margin: 0;"> <span id="LC262" class="line" lang="python">          <span class="k" style="font-weight: 600;">return</span> <span class="n" style="color: #333;">name</span><span class="p">[</span><span class="mi" style="color: #099;">2</span><span class="p">:]</span></span>

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<pre style="margin: 0;"> <span id="LC263" class="line" lang="python">        <span class="k" style="font-weight: 600;">else</span><span class="p">:</span></span>

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<li id="484e50173b324b5842d294580ec9ed8a7b0d5d38">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#484e50173b324b5842d294580ec9ed8a7b0d5d38"><strong>libraries/base/GHC/Conc/Sync.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -497,7 +497,7 @@ labelThread (ThreadId t) str =</td>

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<pre style="margin: 0;"> <span id="LC497" class="line" lang="haskell">     <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">labelThread</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">t</span> <span class="n" style="color: #333;">p</span> <span class="n" style="color: #333;">s</span> <span class="kr" style="font-weight: 600;">of</span> <span class="n" style="color: #333;">s1</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">s1</span><span class="p">,</span> <span class="nb" style="color: #0086b3;">()</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC498" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC499" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      Nota Bene: 'pseq' used to be 'seq'</span></span>

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<pre style="margin: 0;">-<span id="LC500" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--                 but 'seq' is now defined in <span class="idiff left right">PrelGHC</span></span></span>

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<pre style="margin: 0;">+<span id="LC500" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--                 but 'seq' is now defined in <span class="idiff left right">GHC.Prim</span></span></span>

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<pre style="margin: 0;"> <span id="LC501" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

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<pre style="margin: 0;"> <span id="LC502" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- "pseq" is defined a bit weirdly (see below)</span></span>

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<pre style="margin: 0;"> <span id="LC503" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

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<br>

</li>

<li id="613eb2a1c706c7ea57be637d2c8ed135d1d2af29">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#613eb2a1c706c7ea57be637d2c8ed135d1d2af29"><strong>libraries/base/GHC/TypeNats.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="82" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="82" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -82,7 +82,7 @@ someNatVal n = withSNat SomeNat (SNat n) Proxy</td>

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<pre style="margin: 0;"> <span id="LC82" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [NOINLINE someNatVal]</span></span>

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<pre style="margin: 0;"> <span id="LC83" class="line" lang="haskell"></span>

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<td class="diff-line-num old_line" data-linenumber="84" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC84" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">`someNatVal` converts a natural number to an existentially quantified</span></span>

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<pre style="margin: 0;">-<span id="LC85" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">dictionary for `KnowNat` (aka `SomeNat`).  The existential quantification</span></span>

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<pre style="margin: 0;">+<span id="LC85" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">dictionary for `Know<span class="idiff left right">n</span>Nat` (aka `SomeNat`).  The existential quantification</span></span>

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<pre style="margin: 0;"> <span id="LC86" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is very important, as it captures the fact that we don't know the type</span></span>

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<pre style="margin: 0;"> <span id="LC87" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">statically, although we do know that it exists.   Because this type is</span></span>

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<pre style="margin: 0;"> <span id="LC88" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">fully opaque, we should never be able to prove that it matches anything else.</span></span>

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<li id="98b46afb652ad9b66a276d3c312d1262c3838642">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#98b46afb652ad9b66a276d3c312d1262c3838642"><strong>libraries/base/Unsafe/Coerce.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="277" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="277" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -277,7 +277,7 @@ unsafeEqualityProof = case unsafeEqualityProof @a @b of UnsafeRefl -> UnsafeRefl</td>

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<pre style="margin: 0;"> <span id="LC277" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      are the same  -- but the proof of that relies on the complex, trusted</span></span>

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<pre style="margin: 0;"> <span id="LC278" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      implementation of @Typeable@.</span></span>

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<pre style="margin: 0;"> <span id="LC279" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

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<pre style="margin: 0;">-<span id="LC280" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   4. The "reflection trick", which takes advanta<span class="idiff left right">na</span>ge of the fact that in</span></span>

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<pre style="margin: 0;">+<span id="LC280" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   4. The "reflection trick", which takes advantage of the fact that in</span></span>

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<pre style="margin: 0;"> <span id="LC281" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      @class C a where { op :: ty }@, we can safely coerce between @C a@ and @ty@</span></span>

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<pre style="margin: 0;"> <span id="LC282" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      (which have different kinds!) because it's really just a newtype.</span></span>

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<pre style="margin: 0;"> <span id="LC283" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      Note: there is /no guarantee, at all/ that this behavior will be supported</span></span>

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<li id="24275227d2bf375fcdf395e9e895a83bf8c86491">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#24275227d2bf375fcdf395e9e895a83bf8c86491"><strong>libraries/ghc-prim/GHC/Prim/Ext.hs</strong></a>

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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="n" style="color: #333;">include</span> <span class="s" style="color: #d14;">"MachDeps.h"</span></span>

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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See note [When do out-of-line primops go in primops.txt.pp]. More primops</span></span>

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<pre style="margin: 0;">-<span id="LC13" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- there are elgible according to the description below, but cannot yet be moved</span></span>

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- there are el<span class="idiff left right">i</span>gible according to the description below, but cannot yet be moved</span></span>

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14

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14

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- here because of superficial restrictions to `foreign import prim`. Hopefully</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="15" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

15

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<td class="diff-line-num new_line" data-linenumber="15" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- that is fixed soon.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="16" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

16

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<td class="diff-line-num new_line" data-linenumber="16" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

16

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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"></span>

</pre>

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<li id="156cc2660393f1d1fc85c7add1ed2dbebe4ed154">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#156cc2660393f1d1fc85c7add1ed2dbebe4ed154"><strong>testsuite/tests/typecheck/should_fail/T18357b.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -10,4 +10,4 @@ newtype T :: Type where</td>

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<td class="diff-line-num old_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

10

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<td class="diff-line-num new_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

10

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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MkT</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">T</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Star</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="11" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

11

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<td class="diff-line-num new_line" data-linenumber="11" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

11

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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

12

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<td class="diff-line-num new_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

12

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The error message is pretty terrible</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="13" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

13

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<td class="diff-line-num new_line old" data-linenumber="13" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC13" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- but it probably never<span class="idiff left right">y</span> happens in practice</span></span></pre>

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<td class="diff-line-num new old_line" data-linenumber="14" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="13" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

13

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- but it probably never happens in practice</span></span></pre>

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<br>

</li>

<li id="9f8e1cdb633f79039d0792275510ccf1d8cf8d32">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a9ae83af9e0cf48e860f2b7e1d50a057cb8a7890#9f8e1cdb633f79039d0792275510ccf1d8cf8d32"><strong>utils/genprimopcode/Main.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="274" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="274" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -274,7 +274,7 @@ gen_hs_source (Info defaults entries) =</td>

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<td class="diff-line-num old_line" data-linenumber="274" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

274

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<pre style="margin: 0;"> <span id="LC274" class="line" lang="haskell">                     <span class="c1" style="color: #998; font-style: italic;">-- with Declaration for $fEqMaybe:</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="275" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="275" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC275" class="line" lang="haskell">                     <span class="c1" style="color: #998; font-style: italic;">--       attempting to use module ‘GHC.Classes’</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="276" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC276" class="line" lang="haskell">                     <span class="c1" style="color: #998; font-style: italic;">--       (libraries/ghc-prim/./GHC/Classes.hs) which is not loaded</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="277" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC277" class="line" lang="haskell">                     <span class="c1" style="color: #998; font-style: italic;">-- coming from GHC.I<span class="idiff left right">F</span>ace.Load.homeModError</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="277" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC277" class="line" lang="haskell">                     <span class="c1" style="color: #998; font-style: italic;">-- coming from GHC.I<span class="idiff left right">f</span>ace.Load.homeModError</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

278

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<td class="diff-line-num new_line" data-linenumber="278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC278" class="line" lang="haskell">                     <span class="c1" style="color: #998; font-style: italic;">-- I'm not sure precisely why; but I *am* sure that we don't need</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="279" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

279

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<pre style="margin: 0;"> <span id="LC279" class="line" lang="haskell">                     <span class="c1" style="color: #998; font-style: italic;">-- any type-class defaulting; and it's clearly wrong to need</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="280" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

280

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<td class="diff-line-num new_line" data-linenumber="280" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC280" class="line" lang="haskell">                     <span class="c1" style="color: #998; font-style: italic;">-- the base package when haddocking ghc-prim</span></span>

</pre>

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