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<h3>
Ben Gamari pushed to branch wip/keepAlive-optionB
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/966c190eab11654270bec5dbe5912c96390f8bed">966c190e</a></strong>
<div>
<span>by GHC GitLab CI</span>
<i>at 2020-09-10T17:16:51+00:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Simplify
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8acc7f9b999bd39899be67b2abfc559086482d81">8acc7f9b</a></strong>
<div>
<span>by GHC GitLab CI</span>
<i>at 2020-09-10T17:16:51+00:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">hadrian: Don't include -fdiagnostics-color in argument hash
Otherwise the input hash will vary with whether colors are requested,
which changed with `isatty`.
Fixes #17983.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a3cf57fd7d3a1bc47aa9c4c7ab4c884863ef4f45">a3cf57fd</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-09-10T17:16:51+00:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">base: Use keepAlive# in withForeignPtr
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d6a05f42ed6dd81ce18e7fe2a415cd80d4b4168f">d6a05f42</a></strong>
<div>
<span>by GHC GitLab CI</span>
<i>at 2020-09-10T17:16:51+00:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">base: Make touchForeignPtr more robust
Previously touchForeignPtr would touch the ForeignPtr's
associated ForeignPtrContents. However, this is a normal constructor and
therefore can be eliminated by the simplifier. To ensure that the
foreign pointer's contents isn't dropped we need to rather `touch#` the
underlying array (which is the same thing that we key the `Weak` on when
adding finalizers).
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/36c95e394bd58147070966409d4ba926799db094">36c95e39</a></strong>
<div>
<span>by GHC GitLab CI</span>
<i>at 2020-09-10T17:16:51+00:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">base: Make ForeignPtrContents of ForeignPtr strict
As mentioned in #17290, there are strong benefits to the
`ForeignPtrContents` field of `ForeignPtr` being strict. In particular,
when looking at the reproducer for #17746, I noticed that the
`ForeignPtrContents` was being allocated on every call to
`withForeignPtr` just to be `touch#`'d'. This is a pretty large
overhead for something like `withForeignPtr` that should be free.
This required updating the `bytestring` submodule to avoid a bottoming
`ForeignPtrContents` in `Data.ByteString.Internal`
Fixes #17290.
</pre>
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<h4>7 changed files:</h4>
<ul>
<li class="file-stats">
<a href="#f168a93cde5e2aec2441d6331dfe500172df4af3">
compiler/GHC/Core/Opt/Simplify.hs
</a>
</li>
<li class="file-stats">
<a href="#a5d27de4e3111a69f69902c65ecf7b3379f7c49a">
compiler/GHC/CoreToStg/Prep.hs
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<li class="file-stats">
<a href="#52ac3fb9d79a975886f930e407b4c98c993e9e8e">
hadrian/src/Settings/Builders/Ghc.hs
</a>
</li>
<li class="file-stats">
<a href="#ab592100ed82c8a311237d6f24c5de0d0f5297a4">
hadrian/src/Target.hs
</a>
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<li class="file-stats">
<a href="#67eb7bf6167db761647d70b8c599a9f0b917dcfe">
libraries/base/Foreign/ForeignPtr/Imp.hs
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<li class="file-stats">
<a href="#269448746b2d7046ede74979e927b8642db7271f">
libraries/base/GHC/ForeignPtr.hs
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</li>
<li class="file-stats">
<a href="#ccb6db036bae2c1242147ab8e03f3410502feba9">
libraries/bytestring
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</li>
</ul>
<h4>Changes:</h4>
<li id="f168a93cde5e2aec2441d6331dfe500172df4af3">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/03b1daef7b206c7ad66b8a417381a90b0070d28e...36c95e394bd58147070966409d4ba926799db094#f168a93cde5e2aec2441d6331dfe500172df4af3"><strong>compiler/GHC/Core/Opt/Simplify.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">@@ -68,7 +68,7 @@ import GHC.Utils.Misc</td>
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<pre style="margin: 0;"> <span id="LC68" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Error</span></span>
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Unit.Module</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">moduleName</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pprModuleName</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC70" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Multiplicity</span></span>
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<pre style="margin: 0;">-<span id="LC71" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.PrimOps</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">PrimOp</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SeqOp</span><span class="p">)</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC71" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.PrimOps</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">PrimOp</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SeqOp</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">KeepAliveOp</span></span><span class="p">)</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC72" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC73" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC74" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2014" 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="2014" 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">@@ -2014,28 +2014,36 @@ rebuildCall env fun_info</td>
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2014
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2014
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<pre style="margin: 0;"> <span id="LC2014" class="line" lang="haskell"><span class="n" style="color: #333;">rebuildCall</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ArgInfo</span> <span class="p">{</span> <span class="n" style="color: #333;">ai_fun</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fun</span><span class="p">,</span> <span class="n" style="color: #333;">ai_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rev_args</span> <span class="p">})</span> <span class="n" style="color: #333;">cont</span></span>
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2015
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2015
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<pre style="margin: 0;"> <span id="LC2015" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rebuild</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">argInfoExpr</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">rev_args</span><span class="p">)</span> <span class="n" style="color: #333;">cont</span></span>
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2016
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2016
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<pre style="margin: 0;"> <span id="LC2016" class="line" lang="haskell"></span>
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2017
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<pre style="margin: 0;">+<span id="LC2017" class="line" lang="haskell"><span class="cd">-- | Simplifications of runRW# and keepAlive#</span></span>
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2017
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2018
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<pre style="margin: 0;"> <span id="LC2018" class="line" lang="haskell"><span class="n" style="color: #333;">rebuildContOpCall</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SimplEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ArgInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SimplCont</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SimplM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SimplFloats</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">OutExpr</span><span class="p">))</span></span>
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2018
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<pre style="margin: 0;">-<span id="LC2018" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">---------- The runRW# rule. Do this after absorbing all arguments ------</span></span>
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2019
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<pre style="margin: 0;">+<span id="LC2019" class="line" lang="haskell"><span class="n" style="color: #333;">rebuildContOpCall</span> <span class="n" style="color: #333;">_env</span> <span class="n" style="color: #333;">_arg_info</span> <span class="n" style="color: #333;">cont</span></span>
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<pre style="margin: 0;">+<span id="LC2020" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">contIsStop</span> <span class="n" style="color: #333;">cont</span> <span class="c1" style="color: #998; font-style: italic;">-- Don't fiddle around if the continuation is boring</span></span>
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<pre style="margin: 0;">+<span id="LC2021" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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2022
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<pre style="margin: 0;">+<span id="LC2022" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2023" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Simplification of runRW#] in GHC.CoreToSTG.Prep.</span></span>
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<pre style="margin: 0;"> <span id="LC2024" 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="LC2021" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- runRW# :: forall (r :: RuntimeRep) (o :: TYPE r). (State# RealWorld -> o) -> o</span></span>
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2022
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<pre style="margin: 0;">-<span id="LC2022" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- K[ runRW# rr ty body ] --> runRW rr' ty' (\s. K[ body s ])</span></span>
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<pre style="margin: 0;">+<span id="LC2025" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- N.B. runRW# :: forall (r :: RuntimeRep) (o :: TYPE r).</span></span>
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2026
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<pre style="margin: 0;">+<span id="LC2026" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (State# RealWorld -> o) -> o</span></span>
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<pre style="margin: 0;">+<span id="LC2027" 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="LC2028" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- K[ runRW# rr ty body ]</span></span>
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<pre style="margin: 0;">+<span id="LC2029" 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="LC2030" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- runRW rr' ty' (\s. K[ body s ])</span></span>
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<pre style="margin: 0;"> <span id="LC2031" class="line" lang="haskell"><span class="n" style="color: #333;">rebuildContOpCall</span></span>
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<pre style="margin: 0;"> <span id="LC2032" class="line" lang="haskell"> <span class="n" style="color: #333;">env</span></span>
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<pre style="margin: 0;"> <span id="LC2033" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ArgInfo</span> <span class="p">{</span> <span class="n" style="color: #333;">ai_fun</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fun_id</span><span class="p">,</span> <span class="n" style="color: #333;">ai_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rev_args</span> <span class="p">})</span></span>
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<pre style="margin: 0;"> <span id="LC2034" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ApplyToVal</span> <span class="p">{</span> <span class="n" style="color: #333;">sc_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">arg</span><span class="p">,</span> <span class="n" style="color: #333;">sc_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">arg_se</span></span>
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2035
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<pre style="margin: 0;"> <span id="LC2035" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sc_cont</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cont</span><span class="p">,</span> <span class="n" style="color: #333;">sc_hole_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fun_ty</span> <span class="p">})</span></span>
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<pre style="margin: 0;"> <span id="LC2036" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">fun_id</span> <span class="p">`</span><span class="n" style="color: #333;">hasKey</span><span class="p">`</span> <span class="n" style="color: #333;">runRWKey</span></span>
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<pre style="margin: 0;">-<span id="LC2029" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">contIsStop</span> <span class="n" style="color: #333;">cont</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Don't fiddle around if the continuation is boring</span></span>
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<pre style="margin: 0;"> <span id="LC2037" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span> <span class="kt" style="color: #458; font-weight: 600;">TyArg</span> <span class="p">{},</span> <span class="kt" style="color: #458; font-weight: 600;">TyArg</span> <span class="p">{}</span> <span class="p">]</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">rev_args</span></span>
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<pre style="margin: 0;"> <span id="LC2038" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span></span>
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2032
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2039
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<pre style="margin: 0;"> <span id="LC2039" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">s</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;">fsLit</span> <span class="s" style="color: #d14;">"s"</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">Many</span> <span class="n" style="color: #333;">realWorldStatePrimTy</span></span>
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2033
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2040
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<pre style="margin: 0;"> <span id="LC2040" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">m</span><span class="p">,</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span><span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitFunTy</span> <span class="n" style="color: #333;">fun_ty</span></span>
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2034
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2041
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<pre style="margin: 0;"> <span id="LC2041" class="line" lang="haskell"> <span class="n" style="color: #333;">env'</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">arg_se</span> <span class="p">`</span><span class="n" style="color: #333;">setInScopeFromE</span><span class="p">`</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="p">`</span><span class="n" style="color: #333;">addNewInScopeIds</span><span class="p">`</span> <span class="p">[</span><span class="n" style="color: #333;">s</span><span class="p">]</span></span>
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2035
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2042
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<pre style="margin: 0;"> <span id="LC2042" class="line" lang="haskell"> <span class="n" style="color: #333;">ty'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">contResultType</span> <span class="n" style="color: #333;">cont</span></span>
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2043
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<pre style="margin: 0;">+<span id="LC2043" class="line" lang="haskell"> <span class="n" style="color: #333;">k'_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkVisFunTy</span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">realWorldStatePrimTy</span> <span class="n" style="color: #333;">ty'</span></span>
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2036
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2044
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<pre style="margin: 0;"> <span id="LC2044" class="line" lang="haskell"> <span class="n" style="color: #333;">cont'</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ApplyToVal</span> <span class="p">{</span> <span class="n" style="color: #333;">sc_dup</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Simplified</span><span class="p">,</span> <span class="n" style="color: #333;">sc_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">s</span></span>
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2037
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2045
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<pre style="margin: 0;"> <span id="LC2045" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sc_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">sc_cont</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cont</span></span>
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2038
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<pre style="margin: 0;">-<span id="LC2038" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sc_hole_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">mkVisFunTy</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">m</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">realWorldStatePrimTy</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">ty'</span></span> <span class="p">}</span></span>
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2046
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<pre style="margin: 0;">+<span id="LC2046" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sc_hole_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">k'_ty</span></span> <span class="p">}</span></span>
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2039
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2047
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<pre style="margin: 0;"> <span id="LC2047" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- cont' applies to s, then K</span></span>
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2040
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2048
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<pre style="margin: 0;"> <span id="LC2048" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">body'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">simplExprC</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">arg</span> <span class="n" style="color: #333;">cont'</span></span>
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2041
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2049
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<pre style="margin: 0;"> <span id="LC2049" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">arg'</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">body'</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2051" 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">@@ -2043,6 +2051,48 @@ rebuildContOpCall</td>
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2043
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2051
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<pre style="margin: 0;"> <span id="LC2051" class="line" lang="haskell"> <span class="n" style="color: #333;">call'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkApps</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">fun_id</span><span class="p">)</span> <span class="p">[</span><span class="n" style="color: #333;">mkTyArg</span> <span class="n" style="color: #333;">rr'</span><span class="p">,</span> <span class="n" style="color: #333;">mkTyArg</span> <span class="n" style="color: #333;">ty'</span><span class="p">,</span> <span class="n" style="color: #333;">arg'</span><span class="p">]</span></span>
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2044
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2052
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<pre style="margin: 0;"> <span id="LC2052" 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;">emptyFloats</span> <span class="n" style="color: #333;">env</span><span class="p">,</span> <span class="n" style="color: #333;">call'</span><span class="p">)</span> <span class="p">}</span></span>
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2053
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<pre style="margin: 0;"> <span id="LC2053" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC2054" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Simplification of keepAlive#] in GHC.CoreToStg.Prep.</span></span>
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2055
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<pre style="margin: 0;">+<span id="LC2055" 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="LC2056" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- K[keepAlive# @a_rep @a @r_rep @r x s k]</span></span>
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2057
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<pre style="margin: 0;">+<span id="LC2057" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ~></span></span>
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2058
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<pre style="margin: 0;">+<span id="LC2058" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- keepAlive# @a_rep @a @r_rep @r x s K[k]</span></span>
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2059
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<pre style="margin: 0;">+<span id="LC2059" class="line" lang="haskell"><span class="n" style="color: #333;">rebuildContOpCall</span></span>
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2060
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<pre style="margin: 0;">+<span id="LC2060" class="line" lang="haskell"> <span class="n" style="color: #333;">env</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2061" 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">
2061
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<pre style="margin: 0;">+<span id="LC2061" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ArgInfo</span> <span class="p">{</span> <span class="n" style="color: #333;">ai_fun</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fun_id</span><span class="p">,</span> <span class="n" style="color: #333;">ai_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rev_args</span> <span class="p">})</span></span>
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2062
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<pre style="margin: 0;">+<span id="LC2062" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ApplyToVal</span> <span class="p">{</span> <span class="n" style="color: #333;">sc_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">k</span><span class="p">,</span> <span class="n" style="color: #333;">sc_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">k_se</span></span>
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2063
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<pre style="margin: 0;">+<span id="LC2063" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sc_cont</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cont</span><span class="p">,</span> <span class="n" style="color: #333;">sc_hole_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fun_ty</span> <span class="p">})</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2064" 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">
2064
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<pre style="margin: 0;">+<span id="LC2064" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="kt" style="color: #458; font-weight: 600;">KeepAliveOp</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">isPrimOpId_maybe</span> <span class="n" style="color: #333;">fun_id</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2065" 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">
2065
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<pre style="margin: 0;">+<span id="LC2065" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span> <span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="p">{</span><span class="n" style="color: #333;">as_arg</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">s0</span><span class="p">}</span></span>
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2066
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<pre style="margin: 0;">+<span id="LC2066" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="p">{</span><span class="n" style="color: #333;">as_arg</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">x</span><span class="p">}</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2067" 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">
2067
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<pre style="margin: 0;">+<span id="LC2067" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TyArg</span> <span class="p">{}</span> <span class="c1" style="color: #998; font-style: italic;">-- res_ty</span></span>
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2068
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<pre style="margin: 0;">+<span id="LC2068" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TyArg</span> <span class="p">{}</span> <span class="c1" style="color: #998; font-style: italic;">-- res_rep</span></span>
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2069
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<pre style="margin: 0;">+<span id="LC2069" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TyArg</span> <span class="p">{</span><span class="n" style="color: #333;">as_arg_ty</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">arg_ty</span><span class="p">}</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2070" 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">
2070
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<pre style="margin: 0;">+<span id="LC2070" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TyArg</span> <span class="p">{</span><span class="n" style="color: #333;">as_arg_ty</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">arg_rep</span><span class="p">}</span></span>
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2071
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<pre style="margin: 0;">+<span id="LC2071" class="line" lang="haskell"> <span class="p">]</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">rev_args</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2072" 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">
2072
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<pre style="margin: 0;">+<span id="LC2072" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2073" 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">
2073
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<pre style="margin: 0;">+<span id="LC2073" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">s</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;">fsLit</span> <span class="s" style="color: #d14;">"s"</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">One</span> <span class="n" style="color: #333;">realWorldStatePrimTy</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2074" 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">
2074
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<pre style="margin: 0;">+<span id="LC2074" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">m</span><span class="p">,</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span><span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitFunTy</span> <span class="n" style="color: #333;">fun_ty</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2075" 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">
2075
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<pre style="margin: 0;">+<span id="LC2075" class="line" lang="haskell"> <span class="n" style="color: #333;">k_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">k_se</span> <span class="p">`</span><span class="n" style="color: #333;">setInScopeFromE</span><span class="p">`</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="p">`</span><span class="n" style="color: #333;">addNewInScopeIds</span><span class="p">`</span> <span class="p">[</span><span class="n" style="color: #333;">s</span><span class="p">]</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2076" 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">
2076
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<pre style="margin: 0;">+<span id="LC2076" class="line" lang="haskell"> <span class="n" style="color: #333;">ty'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">contResultType</span> <span class="n" style="color: #333;">cont</span></span>
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2077
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<pre style="margin: 0;">+<span id="LC2077" class="line" lang="haskell"> <span class="n" style="color: #333;">k'_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkVisFunTy</span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">realWorldStatePrimTy</span> <span class="n" style="color: #333;">ty'</span></span>
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2078
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<pre style="margin: 0;">+<span id="LC2078" class="line" lang="haskell"> <span class="n" style="color: #333;">k_cont</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ApplyToVal</span> <span class="p">{</span> <span class="n" style="color: #333;">sc_dup</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Simplified</span><span class="p">,</span> <span class="n" style="color: #333;">sc_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">s</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2079" 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">
2079
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<pre style="margin: 0;">+<span id="LC2079" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sc_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">k_env</span><span class="p">,</span> <span class="n" style="color: #333;">sc_cont</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cont</span></span>
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2080
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<pre style="margin: 0;">+<span id="LC2080" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sc_hole_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">k'_ty</span> <span class="p">}</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2081" 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">
2081
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<pre style="margin: 0;">+<span id="LC2081" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">k'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">simplExprC</span> <span class="n" style="color: #333;">k_env</span> <span class="n" style="color: #333;">k</span> <span class="n" style="color: #333;">k_cont</span></span>
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2082
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<pre style="margin: 0;">+<span id="LC2082" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">env'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">zapSubstEnv</span> <span class="n" style="color: #333;">env</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2083" 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">
2083
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<pre style="margin: 0;">+<span id="LC2083" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">s0'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">simplExpr</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">s0</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2084" 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">
2084
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<pre style="margin: 0;">+<span id="LC2084" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">x'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">simplExpr</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">x</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2085" 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">
2085
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<pre style="margin: 0;">+<span id="LC2085" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">arg_rep'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">simplType</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">arg_rep</span></span>
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2086
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<pre style="margin: 0;">+<span id="LC2086" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">arg_ty'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">simplType</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">arg_ty</span></span>
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2087
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<pre style="margin: 0;">+<span id="LC2087" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">call'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkApps</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">fun_id</span><span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2088" 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">
2088
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<pre style="margin: 0;">+<span id="LC2088" class="line" lang="haskell"> <span class="p">[</span> <span class="n" style="color: #333;">mkTyArg</span> <span class="n" style="color: #333;">arg_rep'</span><span class="p">,</span> <span class="n" style="color: #333;">mkTyArg</span> <span class="n" style="color: #333;">arg_ty'</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2089" 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">
2089
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<pre style="margin: 0;">+<span id="LC2089" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mkTyArg</span> <span class="p">(</span><span class="n" style="color: #333;">getRuntimeRep</span> <span class="n" style="color: #333;">ty'</span><span class="p">),</span> <span class="n" style="color: #333;">mkTyArg</span> <span class="n" style="color: #333;">ty'</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2090" 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">
2090
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<pre style="margin: 0;">+<span id="LC2090" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">x'</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2091" 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">
2091
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<pre style="margin: 0;">+<span id="LC2091" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">s0'</span></span>
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2092
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<pre style="margin: 0;">+<span id="LC2092" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">k'</span></span>
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2093
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<pre style="margin: 0;">+<span id="LC2093" class="line" lang="haskell"> <span class="p">]</span></span>
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2094
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<pre style="margin: 0;">+<span id="LC2094" 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;">emptyFloats</span> <span class="n" style="color: #333;">env</span><span class="p">,</span> <span class="n" style="color: #333;">call'</span><span class="p">)</span> <span class="p">}</span></span>
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2095
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<pre style="margin: 0;">+<span id="LC2095" class="line" lang="haskell"></span>
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2046
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<td class="diff-line-num new_line" data-linenumber="2096" 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">
2096
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<pre style="margin: 0;"> <span id="LC2096" class="line" lang="haskell"><span class="n" style="color: #333;">rebuildContOpCall</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <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>
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2047
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2097
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<pre style="margin: 0;"> <span id="LC2097" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2098" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Trying rewrite rules]</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/03b1daef7b206c7ad66b8a417381a90b0070d28e...36c95e394bd58147070966409d4ba926799db094#a5d27de4e3111a69f69902c65ecf7b3379f7c49a"><strong>compiler/GHC/CoreToStg/Prep.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">@@ -1096,10 +1096,26 @@ Breaking our desired invariant. Ultimately we decided to simply accept that</td>
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<pre style="margin: 0;"> <span id="LC1096" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the continuation may not be a manifest lambda.</span></span>
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1097
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<pre style="margin: 0;"> <span id="LC1097" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1098" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1099" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Simplification of keepAlive#]</span></span>
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<pre style="margin: 0;">+<span id="LC1100" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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1101
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<pre style="margin: 0;">+<span id="LC1101" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1102" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The keepAlive# primop benefits from a similar optimisation to that described in</span></span>
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1103
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<pre style="margin: 0;">+<span id="LC1103" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Simplification of runRW#] above. Specifically, we transform:</span></span>
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1104
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<pre style="margin: 0;">+<span id="LC1104" class="line" lang="haskell"></span>
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1105
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<pre style="margin: 0;">+<span id="LC1105" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> K[keepAlive# @a_rep @a @r_rep @r x s k]</span></span>
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1106
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<pre style="margin: 0;">+<span id="LC1106" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ~></span></span>
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1107
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<pre style="margin: 0;">+<span id="LC1107" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> keepAlive# @a_rep @a @r_rep @r x s K[k]</span></span>
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1108
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<pre style="margin: 0;">+<span id="LC1108" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1109" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The reasons are similar to those described in Note [Simplification of runRW#].</span></span>
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1110
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<pre style="margin: 0;">+<span id="LC1110" class="line" lang="haskell"></span>
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1111
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<pre style="margin: 0;">+<span id="LC1111" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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1112
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<pre style="margin: 0;">+<span id="LC1112" class="line" lang="haskell"></span>
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1113
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<pre style="margin: 0;">+<span id="LC1113" class="line" lang="haskell"></span>
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1099
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1114
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<pre style="margin: 0;"> <span id="LC1114" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ---------------------------------------------------------------------------</span></span>
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1100
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1115
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<pre style="margin: 0;"> <span id="LC1115" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- CpeArg: produces a result satisfying CpeArg</span></span>
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1101
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1116
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<pre style="margin: 0;"> <span id="LC1116" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ---------------------------------------------------------------------------</span></span>
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1102
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1117
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<pre style="margin: 0;"> <span id="LC1117" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1118" 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="LC1119" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [ANF-ising literal string arguments]</span></span>
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<pre style="margin: 0;"> <span id="LC1120" 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="LC1121" class="line" lang="haskell"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/03b1daef7b206c7ad66b8a417381a90b0070d28e...36c95e394bd58147070966409d4ba926799db094#52ac3fb9d79a975886f930e407b4c98c993e9e8e"><strong>hadrian/src/Settings/Builders/Ghc.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">@@ -35,6 +35,9 @@ compileAndLinkHs = (builder (Ghc CompileHs) ||^ builder (Ghc LinkHs)) ? do</td>
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<pre style="margin: 0;"> <span id="LC35" class="line" lang="haskell"> <span class="n" style="color: #333;">hasDynamic</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">elem</span> <span class="n" style="color: #333;">dynamic</span> <span class="n" style="color: #333;">ways</span></span>
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<pre style="margin: 0;"> <span id="LC36" class="line" lang="haskell"> <span class="n" style="color: #333;">mconcat</span> <span class="p">[</span> <span class="n" style="color: #333;">arg</span> <span class="s" style="color: #d14;">"-Wall"</span></span>
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">not</span> <span class="n" style="color: #333;">useColor</span> <span class="o" style="font-weight: 600;">?</span> <span class="n" style="color: #333;">builder</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ghc</span> <span class="kt" style="color: #458; font-weight: 600;">CompileHs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">?</span></span>
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<pre style="margin: 0;">+<span id="LC38" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- N.B. Target.trackArgument ignores this argument from the</span></span>
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<pre style="margin: 0;">+<span id="LC39" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- input hash to avoid superfluous recompilation, avoiding</span></span>
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<pre style="margin: 0;">+<span id="LC40" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- #18672.</span></span>
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<pre style="margin: 0;"> <span id="LC41" class="line" lang="haskell"> <span class="n" style="color: #333;">arg</span> <span class="s" style="color: #d14;">"-fdiagnostics-color=never"</span></span>
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<pre style="margin: 0;"> <span id="LC42" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">hasVanilla</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">hasDynamic</span><span class="p">)</span> <span class="o" style="font-weight: 600;">?</span> <span class="n" style="color: #333;">builder</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ghc</span> <span class="kt" style="color: #458; font-weight: 600;">CompileHs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">?</span></span>
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<pre style="margin: 0;"> <span id="LC43" class="line" lang="haskell"> <span class="n" style="color: #333;">platformSupportsSharedLibs</span> <span class="o" style="font-weight: 600;">?</span> <span class="n" style="color: #333;">way</span> <span class="n" style="color: #333;">vanilla</span> <span class="o" style="font-weight: 600;">?</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/03b1daef7b206c7ad66b8a417381a90b0070d28e...36c95e394bd58147070966409d4ba926799db094#ab592100ed82c8a311237d6f24c5de0d0f5297a4"><strong>hadrian/src/Target.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">@@ -21,11 +21,12 @@ type Target = H.Target Context Builder</td>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"><span class="n" style="color: #333;">trackArgument</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Target</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">String</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"><span class="n" style="color: #333;">trackArgument</span> <span class="n" style="color: #333;">target</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">builder</span> <span class="n" style="color: #333;">target</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Make</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">threadArg</span> <span class="n" style="color: #333;">arg</span></span>
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<pre style="margin: 0;">-<span id="LC24" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Ghc</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">verbosityArg</span> <span class="n" style="color: #333;">arg</span></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Ghc</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">verbosityArg</span> <span class="n" style="color: #333;">arg</span><span class="idiff left"> </span><span class="o" style="font-weight: 600;"><span class="idiff">||</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">diagnosticsColorArg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">arg</span></span></span>
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Cabal</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">verbosityArg</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">cabal_configure_ignore</span> <span class="n" style="color: #333;">arg</span></span>
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26
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<pre style="margin: 0;"> <span id="LC26" 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;">True</span></span>
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27
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC28" class="line" lang="haskell"> <span class="n" style="color: #333;">threadArg</span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dropWhileEnd</span> <span class="n" style="color: #333;">isDigit</span> <span class="n" style="color: #333;">s</span> <span class="p">`</span><span class="n" style="color: #333;">elem</span><span class="p">`</span> <span class="p">[</span><span class="s" style="color: #d14;">"-j"</span><span class="p">,</span> <span class="s" style="color: #d14;">"MAKEFLAGS=-j"</span><span class="p">,</span> <span class="s" style="color: #d14;">"THREADS="</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"> <span class="n" style="color: #333;">verbosityArg</span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dropWhileEnd</span> <span class="n" style="color: #333;">isDigit</span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">==</span> <span class="s" style="color: #d14;">"-v"</span></span>
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<pre style="margin: 0;">+<span id="LC30" class="line" lang="haskell"> <span class="n" style="color: #333;">diagnosticsColorArg</span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"-fdiagnostics-color="</span> <span class="p">`</span><span class="n" style="color: #333;">isPrefixOf</span><span class="p">`</span> <span class="n" style="color: #333;">s</span> <span class="c1" style="color: #998; font-style: italic;">-- N.B. #18672</span></span>
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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"> <span class="n" style="color: #333;">cabal_configure_ignore</span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"> <span class="n" style="color: #333;">s</span> <span class="p">`</span><span class="n" style="color: #333;">elem</span><span class="p">`</span> <span class="p">[</span> <span class="s" style="color: #d14;">"--configure-option=--quiet"</span><span class="p">,</span> <span class="s" style="color: #d14;">"--configure-option=--disable-option-checking"</span> <span class="p">]</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/03b1daef7b206c7ad66b8a417381a90b0070d28e...36c95e394bd58147070966409d4ba926799db094#67eb7bf6167db761647d70b8c599a9f0b917dcfe"><strong>libraries/base/Foreign/ForeignPtr/Imp.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">@@ -66,31 +66,6 @@ newForeignPtr finalizer p</td>
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<pre style="margin: 0;"> <span id="LC66" class="line" lang="haskell"> <span class="n" style="color: #333;">addForeignPtrFinalizer</span> <span class="n" style="color: #333;">finalizer</span> <span class="n" style="color: #333;">fObj</span></span>
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<pre style="margin: 0;"> <span id="LC67" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">fObj</span></span>
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<pre style="margin: 0;"> <span id="LC68" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC69" class="line" lang="haskell"><span class="n" style="color: #333;">withForeignPtr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ForeignPtr</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ptr</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;">IO</span> <span class="n" style="color: #333;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="n" style="color: #333;">b</span></span>
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<pre style="margin: 0;">-<span id="LC70" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ^This is a way to look at the pointer living inside a</span></span>
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<pre style="margin: 0;">-<span id="LC71" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- foreign object. This function takes a function which is</span></span>
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<pre style="margin: 0;">-<span id="LC72" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- applied to that pointer. The resulting 'IO' action is then</span></span>
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<pre style="margin: 0;">-<span id="LC73" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- executed. The foreign object is kept alive at least during</span></span>
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<pre style="margin: 0;">-<span id="LC74" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the whole action, even if it is not used directly</span></span>
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<pre style="margin: 0;">-<span id="LC75" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- inside. Note that it is not safe to return the pointer from</span></span>
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<pre style="margin: 0;">-<span id="LC76" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the action and use it after the action completes. All uses</span></span>
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<pre style="margin: 0;">-<span id="LC77" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- of the pointer should be inside the</span></span>
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<pre style="margin: 0;">-<span id="LC78" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'withForeignPtr' bracket. The reason for</span></span>
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<pre style="margin: 0;">-<span id="LC79" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- this unsafeness is the same as for</span></span>
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<pre style="margin: 0;">-<span id="LC80" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'unsafeForeignPtrToPtr' below: the finalizer</span></span>
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<pre style="margin: 0;">-<span id="LC81" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- may run earlier than expected, because the compiler can only</span></span>
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<pre style="margin: 0;">-<span id="LC82" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- track usage of the 'ForeignPtr' object, not</span></span>
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<pre style="margin: 0;">-<span id="LC83" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- a 'Ptr' object made from it.</span></span>
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<pre style="margin: 0;">-<span id="LC84" 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="LC85" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This function is normally used for marshalling data to</span></span>
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<pre style="margin: 0;">-<span id="LC86" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- or from the object pointed to by the</span></span>
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<pre style="margin: 0;">-<span id="LC87" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'ForeignPtr', using the operations from the</span></span>
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<pre style="margin: 0;">-<span id="LC88" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'Storable' class.</span></span>
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<pre style="margin: 0;">-<span id="LC89" class="line" lang="haskell"><span class="n" style="color: #333;">withForeignPtr</span> <span class="n" style="color: #333;">fo</span> <span class="n" style="color: #333;">io</span></span>
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90
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<pre style="margin: 0;">-<span id="LC90" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">io</span> <span class="p">(</span><span class="n" style="color: #333;">unsafeForeignPtrToPtr</span> <span class="n" style="color: #333;">fo</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC91" class="line" lang="haskell"> <span class="n" style="color: #333;">touchForeignPtr</span> <span class="n" style="color: #333;">fo</span></span>
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<pre style="margin: 0;">-<span id="LC92" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">r</span></span>
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<pre style="margin: 0;">-<span id="LC93" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="haskell"><span class="cd">-- | This variant of 'newForeignPtr' adds a finalizer that expects an</span></span>
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<pre style="margin: 0;"> <span id="LC70" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- environment in addition to the finalized pointer. The environment</span></span>
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<pre style="margin: 0;"> <span id="LC71" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- that will be passed to the finalizer is fixed by the second argument to</span></span>
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<li id="269448746b2d7046ede74979e927b8642db7271f">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/03b1daef7b206c7ad66b8a417381a90b0070d28e...36c95e394bd58147070966409d4ba926799db094#269448746b2d7046ede74979e927b8642db7271f"><strong>libraries/base/GHC/ForeignPtr.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">@@ -3,6 +3,8 @@</td>
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3
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<pre style="margin: 0;"> <span id="LC3" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE NoImplicitPrelude #-}</span></span>
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4
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE UnboxedTuples #-}</span></span>
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5
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<pre style="margin: 0;"> <span id="LC5" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE Unsafe #-}</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE RankNTypes #-}</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE KindSignatures #-}</span></span>
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<pre style="margin: 0;"> <span id="LC8" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC9" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# OPTIONS_HADDOCK not-home #-}</span></span>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"></span>
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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">@@ -46,6 +48,7 @@ module GHC.ForeignPtr</td>
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<pre style="margin: 0;"> <span id="LC48" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">castForeignPtr</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC49" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">plusForeignPtr</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC50" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- * Finalization</span></span>
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<pre style="margin: 0;">+<span id="LC51" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">withForeignPtr</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC52" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">touchForeignPtr</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">finalizeForeignPtr</span></span>
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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- * Commentary</span></span>
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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">@@ -55,6 +58,7 @@ module GHC.ForeignPtr</td>
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<pre style="margin: 0;"> <span id="LC58" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Foreign.Storable</span></span>
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<pre style="margin: 0;"> <span id="LC59" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Foldable</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">sequence_</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC60" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC61" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types</span></span>
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<pre style="margin: 0;"> <span id="LC62" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Show</span></span>
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<pre style="margin: 0;"> <span id="LC63" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Base</span></span>
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<pre style="margin: 0;"> <span id="LC64" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.IORef</span></span>
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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">@@ -79,7 +83,7 @@ import Unsafe.Coerce ( unsafeCoerce, unsafeCoerceUnlifted )</td>
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<pre style="margin: 0;"> <span id="LC83" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- type argument of 'ForeignPtr' should normally be an instance of</span></span>
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<pre style="margin: 0;"> <span id="LC84" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- class 'Storable'.</span></span>
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<pre style="margin: 0;"> <span id="LC85" 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="LC82" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">ForeignPtr</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;">ForeignPtr</span> <span class="kt" style="color: #458; font-weight: 600;">Addr</span><span class="o" style="font-weight: 600;">#</span> <span class="kt" style="color: #458; font-weight: 600;">ForeignPtrContents</span></span>
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<pre style="margin: 0;">+<span id="LC86" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">ForeignPtr</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;">ForeignPtr</span> <span class="kt" style="color: #458; font-weight: 600;">Addr</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;"><span class="idiff left right">!</span></span><span class="kt" style="color: #458; font-weight: 600;">ForeignPtrContents</span></span>
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87
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<pre style="margin: 0;"> <span id="LC87" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The Addr# in the ForeignPtr object is intentionally stored</span></span>
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84
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88
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<pre style="margin: 0;"> <span id="LC88" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- separately from the finalizer. The primary aim of the</span></span>
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89
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<pre style="margin: 0;"> <span id="LC89" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- representation is to make withForeignPtr efficient; in fact,</span></span>
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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">@@ -124,7 +128,7 @@ data ForeignPtrContents</td>
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124
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128
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<pre style="margin: 0;"> <span id="LC128" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ^ The pointer refers to unmanaged memory that should not be freed when</span></span>
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125
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129
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<pre style="margin: 0;"> <span id="LC129" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- the 'ForeignPtr' becomes unreachable. Functions that add finalizers</span></span>
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126
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130
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<pre style="margin: 0;"> <span id="LC130" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- to a 'ForeignPtr' throw exceptions when the 'ForeignPtr' is backed by</span></span>
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127
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<pre style="margin: 0;">-<span id="LC127" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- 'PlainPtr'Most commonly, this is used with @Addr#@ literals.</span></span>
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131
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<pre style="margin: 0;">+<span id="LC131" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- 'PlainPtr'<span class="idiff left right">. </span>Most commonly, this is used with @Addr#@ literals.</span></span>
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128
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<pre style="margin: 0;"> <span id="LC132" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Why FinalPtr].</span></span>
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<pre style="margin: 0;"> <span id="LC133" 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="LC134" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- @since 4.15</span></span>
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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">@@ -162,6 +166,7 @@ data ForeignPtrContents</td>
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162
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166
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<pre style="margin: 0;"> <span id="LC166" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The invariants that apply to 'MallocPtr' apply to 'PlainPtr' as well.</span></span>
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167
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<pre style="margin: 0;"> <span id="LC167" class="line" lang="haskell"></span>
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164
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<pre style="margin: 0;"> <span id="LC168" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Note [Why FinalPtr]</span></span>
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169
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<pre style="margin: 0;">+<span id="LC169" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ~~~~~~~~~~~~~~~~~~~</span></span>
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165
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170
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<pre style="margin: 0;"> <span id="LC170" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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166
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<pre style="margin: 0;"> <span id="LC171" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- FinalPtr exists as an optimization for foreign pointers created</span></span>
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<pre style="margin: 0;"> <span id="LC172" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- from Addr# literals. Most commonly, this happens in the bytestring</span></span>
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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">@@ -428,7 +433,7 @@ addForeignPtrConcFinalizer_ f@(MallocPtr fo r) finalizer = do</td>
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428
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433
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<pre style="margin: 0;"> <span id="LC433" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span></span>
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429
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434
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<pre style="margin: 0;"> <span id="LC434" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC435" class="line" lang="haskell"> <span class="n" style="color: #333;">finalizer'</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">State</span><span class="o" style="font-weight: 600;">#</span> <span class="kt" style="color: #458; font-weight: 600;">RealWorld</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="kt" style="color: #458; font-weight: 600;">State</span><span class="o" style="font-weight: 600;">#</span> <span class="kt" style="color: #458; font-weight: 600;">RealWorld</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="LC431" class="line" lang="haskell"> <span class="n" style="color: #333;">finalizer'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unIO</span> <span class="p">(</span><span class="n" style="color: #333;">foreignPtrFinalizer</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">>></span> <span class="n" style="color: #333;">touch</span> <span class="n" style="color: #333;">f</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC436" class="line" lang="haskell"> <span class="n" style="color: #333;">finalizer'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unIO</span> <span class="p">(</span><span class="n" style="color: #333;">foreignPtrFinalizer</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">>></span> <span class="n" style="color: #333;">touch<span class="idiff left right">ForeignPtrContents</span></span> <span class="n" style="color: #333;">f</span><span class="p">)</span></span>
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437
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<pre style="margin: 0;"> <span id="LC437" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC438" class="line" lang="haskell"><span class="n" style="color: #333;">addForeignPtrConcFinalizer_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;"> <span id="LC439" class="line" lang="haskell"> <span class="n" style="color: #333;">errorWithoutStackTrace</span> <span class="s" style="color: #d14;">"GHC.ForeignPtr: attempt to add a finalizer to plain pointer or a final pointer"</span></span>
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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">@@ -503,6 +508,36 @@ newForeignPtr_ (Ptr obj) = do</td>
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<pre style="margin: 0;"> <span id="LC508" class="line" lang="haskell"> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newIORef</span> <span class="kt" style="color: #458; font-weight: 600;">NoFinalizers</span></span>
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504
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<pre style="margin: 0;"> <span id="LC509" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ForeignPtr</span> <span class="n" style="color: #333;">obj</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PlainForeignPtr</span> <span class="n" style="color: #333;">r</span><span class="p">))</span></span>
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510
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<pre style="margin: 0;"> <span id="LC510" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC511" class="line" lang="haskell"><span class="n" style="color: #333;">withForeignPtr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ForeignPtr</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ptr</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;">IO</span> <span class="n" style="color: #333;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="n" style="color: #333;">b</span></span>
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<pre style="margin: 0;">+<span id="LC512" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ^This is a way to look at the pointer living inside a</span></span>
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<pre style="margin: 0;">+<span id="LC513" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- foreign object. This function takes a function which is</span></span>
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<pre style="margin: 0;">+<span id="LC514" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- applied to that pointer. The resulting 'IO' action is then</span></span>
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<pre style="margin: 0;">+<span id="LC515" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- executed. The foreign object is kept alive at least during</span></span>
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<pre style="margin: 0;">+<span id="LC516" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the whole action, even if it is not used directly</span></span>
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<pre style="margin: 0;">+<span id="LC517" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- inside. Note that it is not safe to return the pointer from</span></span>
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<pre style="margin: 0;">+<span id="LC518" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the action and use it after the action completes. All uses</span></span>
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519
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<pre style="margin: 0;">+<span id="LC519" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- of the pointer should be inside the</span></span>
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<pre style="margin: 0;">+<span id="LC520" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'withForeignPtr' bracket. The reason for</span></span>
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521
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<pre style="margin: 0;">+<span id="LC521" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- this unsafeness is the same as for</span></span>
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<pre style="margin: 0;">+<span id="LC522" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'unsafeForeignPtrToPtr' below: the finalizer</span></span>
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<pre style="margin: 0;">+<span id="LC523" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- may run earlier than expected, because the compiler can only</span></span>
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524
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<pre style="margin: 0;">+<span id="LC524" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- track usage of the 'ForeignPtr' object, not</span></span>
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525
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<pre style="margin: 0;">+<span id="LC525" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- a 'Ptr' object made from it.</span></span>
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526
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<pre style="margin: 0;">+<span id="LC526" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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527
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<pre style="margin: 0;">+<span id="LC527" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This function is normally used for marshalling data to</span></span>
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528
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<pre style="margin: 0;">+<span id="LC528" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- or from the object pointed to by the</span></span>
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529
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<pre style="margin: 0;">+<span id="LC529" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'ForeignPtr', using the operations from the</span></span>
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530
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<pre style="margin: 0;">+<span id="LC530" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'Storable' class.</span></span>
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531
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<pre style="margin: 0;">+<span id="LC531" class="line" lang="haskell"><span class="n" style="color: #333;">withForeignPtr</span> <span class="n" style="color: #333;">fo</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ForeignPtr</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span></span>
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532
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<pre style="margin: 0;">+<span id="LC532" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="n" style="color: #333;">unsafeForeignPtrToPtr</span> <span class="n" style="color: #333;">fo</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">of</span></span>
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533
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<pre style="margin: 0;">+<span id="LC533" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="n" style="color: #333;">action</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-></span></span>
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534
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<pre style="margin: 0;">+<span id="LC534" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">r</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC535" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">PlainForeignPtr</span> <span class="n" style="color: #333;">ref</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">keepAlive</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">ref</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">action</span><span class="o" style="font-weight: 600;">#</span></span>
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536
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<pre style="margin: 0;">+<span id="LC536" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">FinalPtr</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">action</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">s</span></span>
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537
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<pre style="margin: 0;">+<span id="LC537" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MallocPtr</span> <span class="n" style="color: #333;">mba</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">keepAlive</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">mba</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">action</span><span class="o" style="font-weight: 600;">#</span></span>
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538
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<pre style="margin: 0;">+<span id="LC538" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">PlainPtr</span> <span class="n" style="color: #333;">mba</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">keepAlive</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">mba</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">action</span><span class="o" style="font-weight: 600;">#</span></span>
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539
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<pre style="margin: 0;">+<span id="LC539" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC541" class="line" lang="haskell"><span class="n" style="color: #333;">touchForeignPtr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ForeignPtr</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;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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507
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<pre style="margin: 0;"> <span id="LC542" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ^This function ensures that the foreign object in</span></span>
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508
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<pre style="margin: 0;"> <span id="LC543" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- question is alive at the given place in the sequence of IO</span></span>
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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">@@ -528,10 +563,19 @@ touchForeignPtr :: ForeignPtr a -> IO ()</td>
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<pre style="margin: 0;"> <span id="LC563" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- result in artificial deadlock. Another alternative is to use</span></span>
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<pre style="margin: 0;"> <span id="LC564" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- explicit reference counting.</span></span>
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<pre style="margin: 0;"> <span id="LC565" 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="LC531" class="line" lang="haskell"><span class="n" style="color: #333;">touchForeignPtr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ForeignPtr</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">touch</span> <span class="n" style="color: #333;">r</span></span>
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<pre style="margin: 0;">+<span id="LC566" class="line" lang="haskell"><span class="n" style="color: #333;">touchForeignPtr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ForeignPtr</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">touchForeignPtrContents</span> <span class="n" style="color: #333;">r</span></span>
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<pre style="margin: 0;">+<span id="LC567" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC568" class="line" lang="haskell"><span class="n" style="color: #333;">touchForeignPtrContents</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ForeignPtrContents</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC569" class="line" lang="haskell"><span class="n" style="color: #333;">touchForeignPtrContents</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PlainForeignPtr</span> <span class="n" style="color: #333;">ref</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">touchLifted</span> <span class="n" style="color: #333;">ref</span></span>
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<pre style="margin: 0;">+<span id="LC570" class="line" lang="haskell"><span class="n" style="color: #333;">touchForeignPtrContents</span> <span class="kt" style="color: #458; font-weight: 600;">FinalPtr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC571" class="line" lang="haskell"><span class="n" style="color: #333;">touchForeignPtrContents</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MallocPtr</span> <span class="n" style="color: #333;">mba</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">touchUnlifted</span> <span class="n" style="color: #333;">mba</span></span>
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<pre style="margin: 0;">+<span id="LC572" class="line" lang="haskell"><span class="n" style="color: #333;">touchForeignPtrContents</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PlainPtr</span> <span class="n" style="color: #333;">mba</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">touchUnlifted</span> <span class="n" style="color: #333;">mba</span></span>
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<pre style="margin: 0;">+<span id="LC573" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC574" class="line" lang="haskell"><span class="n" style="color: #333;">touchLifted</span> <span class="o" style="font-weight: 600;">::</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;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC575" class="line" lang="haskell"><span class="n" style="color: #333;">touchLifted</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">touch</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">s</span> <span class="kr" style="font-weight: 600;">of</span> <span class="n" style="color: #333;">s'</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;">s'</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="LC576" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC533" class="line" lang="haskell"><span class="n" style="color: #333;">touch</span><span class="idiff left"> </span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">ForeignPtrContents</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">-<span id="LC534" class="line" lang="haskell"><span class="n" style="color: #333;">touch</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">touch</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">s</span> <span class="kr" style="font-weight: 600;">of</span> <span class="n" style="color: #333;">s'</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;">s'</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="LC577" class="line" lang="haskell"><span class="n" style="color: #333;">touch<span class="idiff left">Unlifted</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">forall</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">a</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">TYPE</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">'UnliftedRep</span></span><span class="p"><span class="idiff">)</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">a</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC578" class="line" lang="haskell"><span class="n" style="color: #333;">touch<span class="idiff left right">Unlifted</span></span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">touch</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">s</span> <span class="kr" style="font-weight: 600;">of</span> <span class="n" style="color: #333;">s'</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;">s'</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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535
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579
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<pre style="margin: 0;"> <span id="LC579" class="line" lang="haskell"></span>
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580
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<pre style="margin: 0;"> <span id="LC580" class="line" lang="haskell"><span class="n" style="color: #333;">unsafeForeignPtrToPtr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ForeignPtr</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;">Ptr</span> <span class="n" style="color: #333;">a</span></span>
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537
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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;">-- ^This function extracts the pointer component of a foreign</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/03b1daef7b206c7ad66b8a417381a90b0070d28e...36c95e394bd58147070966409d4ba926799db094#ccb6db036bae2c1242147ab8e03f3410502feba9"><strong>libraries/bytestring</strong></a>
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<pre style="margin: 0;">-Subproject commit <span class="idiff left right">e6cb01e2ec0bfdd19298418c85f220925a9fa307</span></pre>
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<pre style="margin: 0;">+Subproject commit <span class="idiff left right">cff1ad3422ed463cf92ea996b276da9156200bbf</span></pre>
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