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<h3>
 Marge Bot pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4>
Commits:
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<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/bff74de713dac3e62c3bb6f1946e0649549f2215">bff74de7</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-11-03T17:43:03-05:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bignum: make GMP's bignat_add not recursive

bignat_add was a loopbreaker with an INLINE pragma (spotted by
@mpickering). This patch makes it non recursive to avoid the issue.
</pre>
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<h4>1 changed file:</h4>
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<a href="#233ee515bec9e1a53e1490cca550d836c94c38ad">
libraries/ghc-bignum/src/GHC/Num/Backend/GMP.hs
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<h4>Changes:</h4>
<li id="233ee515bec9e1a53e1490cca550d836c94c38ad">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/bff74de713dac3e62c3bb6f1946e0649549f2215#233ee515bec9e1a53e1490cca550d836c94c38ad"><strong>libraries/ghc-bignum/src/GHC/Num/Backend/GMP.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">@@ -70,13 +70,13 @@ bignat_add</td>
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<pre style="margin: 0;"> <span id="LC70" class="line" lang="haskell">   <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>
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<pre style="margin: 0;"> <span id="LC71" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# INLINE bignat_add #-}</span></span>
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<pre style="margin: 0;"> <span id="LC72" class="line" lang="haskell"><span class="n" style="color: #333;">bignat_add</span> <span class="n" style="color: #333;">mwa</span> <span class="n" style="color: #333;">wa</span> <span class="n" style="color: #333;">wb</span> <span class="n" style="color: #333;">s</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;">-- weird GMP requirement</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;">-- weird GMP requirement<span class="idiff left right">: the biggest comes first</span></span></span>
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<pre style="margin: 0;"> <span id="LC74" class="line" lang="haskell">   <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isTrue</span><span class="o" style="font-weight: 600;">#</span> <span class="p">(</span><span class="n" style="color: #333;">wordArraySize</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">wb</span> <span class="o" style="font-weight: 600;">>#</span> <span class="n" style="color: #333;">wordArraySize</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">wa</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC75" class="line" lang="haskell">   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bignat_add</span> <span class="n" style="color: #333;">mwa</span> <span class="n" style="color: #333;">wb</span> <span class="n" style="color: #333;">wa</span> <span class="n" style="color: #333;">s</span></span>
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<pre style="margin: 0;">+<span id="LC75" class="line" lang="haskell">   <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">ioWord</span><span class="o" style="font-weight: 600;">#</span> <span class="p">(</span><span class="n" style="color: #333;">c_mpn_add</span> <span class="n" style="color: #333;">mwa</span> <span class="n" style="color: #333;">wb</span> <span class="p">(</span><span class="n" style="color: #333;">wordArraySize</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">wb</span><span class="p">)</span> <span class="n" style="color: #333;">wa</span> <span class="p">(</span><span class="n" style="color: #333;">wordArraySize</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">wa</span><span class="p">))</span> <span class="n" style="color: #333;">s</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC76" class="line" lang="haskell">      <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="n" style="color: #333;">c</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;">mwaWriteMostSignificant</span> <span class="n" style="color: #333;">mwa</span> <span class="n" style="color: #333;">c</span> <span class="n" style="color: #333;">s'</span></span>
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<pre style="margin: 0;"> <span id="LC77" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC78" class="line" lang="haskell">   <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;">-<span id="LC78" class="line" lang="haskell">   <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">-<span id="LC79" class="line" lang="haskell">   <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">ioWord</span><span class="o" style="font-weight: 600;">#</span> <span class="p">(</span><span class="n" style="color: #333;">c_mpn_add</span> <span class="n" style="color: #333;">mwa</span> <span class="n" style="color: #333;">wa</span> <span class="p">(</span><span class="n" style="color: #333;">wordArraySize</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">wa</span><span class="p">)</span> <span class="n" style="color: #333;">wb</span> <span class="p">(</span><span class="n" style="color: #333;">wordArraySize</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">wb</span><span class="p">))</span> <span class="n" style="color: #333;">s</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC79" class="line" lang="haskell">   <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">ioWord</span><span class="o" style="font-weight: 600;">#</span> <span class="p">(</span><span class="n" style="color: #333;">c_mpn_add</span> <span class="n" style="color: #333;">mwa</span> <span class="n" style="color: #333;">wa</span> <span class="p">(</span><span class="n" style="color: #333;">wordArraySize</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">wa</span><span class="p">)</span> <span class="n" style="color: #333;">wb</span> <span class="p">(</span><span class="n" style="color: #333;">wordArraySize</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">wb</span><span class="p">))</span> <span class="n" style="color: #333;">s</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC80" class="line" lang="haskell">      <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="n" style="color: #333;">c</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;">mwaWriteMostSignificant</span> <span class="n" style="color: #333;">mwa</span> <span class="n" style="color: #333;">c</span> <span class="n" style="color: #333;">s'</span></span>
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<td class="diff-line-num old_line" data-linenumber="81" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<td class="diff-line-num new_line" data-linenumber="81" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC81" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;"> <span id="LC82" class="line" lang="haskell"><span class="n" style="color: #333;">bignat_add_word</span></span>
</pre>
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