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<h3>
Sebastian Graf pushed to branch wip/dmdanal-precise-exn
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/8ebfdf4fb3f0e1c020b166f11864b30cf7587d28">8ebfdf4f</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-03-29T17:09:50+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Revert "Change forcesRealWorld to work like the old IO hack"

This reverts commit 516987db1eb32bb231063e1e0fa4ff78178b15c9.
</pre>
</li>
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<h4>1 changed file:</h4>
<ul>
<li class="file-stats">
<a href="#1419e35d2402c23209a644b054c5a67aa4463451">
compiler/GHC/Core/Op/DmdAnal.hs
</a>
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<h4>Changes:</h4>
<li id="1419e35d2402c23209a644b054c5a67aa4463451">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8ebfdf4fb3f0e1c020b166f11864b30cf7587d28#1419e35d2402c23209a644b054c5a67aa4463451"><strong>compiler/GHC/Core/Op/DmdAnal.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">@@ -27,7 +27,6 @@ import Data.List        ( mapAccumL )</td>
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.DataCon</span></span>
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<pre style="margin: 0;"> <span id="LC28" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Id</span></span>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">IdInfo</span></span>
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<pre style="margin: 0;">-<span id="LC30" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">TysWiredIn</span></span>
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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Utils</span></span>
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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCon</span></span>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Type</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="351" 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="350" 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">@@ -351,24 +350,19 @@ forcesRealWorld :: FamInstEnvs -> Type -> Bool</td>
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<pre style="margin: 0;"> <span id="LC350" class="line" lang="haskell"><span class="n" style="color: #333;">forcesRealWorld</span> <span class="n" style="color: #333;">fam_envs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">initRecTc</span></span>
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<pre style="margin: 0;"> <span id="LC351" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC352" class="line" lang="haskell">    <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RecTcChecker</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</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="LC354" class="line" lang="haskell">    <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">_rec_tc</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">-<span id="LC355" 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="p">(</span><span class="n" style="color: #333;">dc</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">field_tys</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;">deepSplitProductType_maybe</span> <span class="n" style="color: #333;">fam_envs</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">-<span id="LC356" class="line" lang="haskell">      <span class="p">,</span> <span class="n" style="color: #333;">dc</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">tupleDataCon</span> <span class="kt" style="color: #458; font-weight: 600;">Unboxed</span> <span class="mi" style="color: #099;">2</span></span>
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<pre style="margin: 0;">-<span id="LC357" class="line" lang="haskell">      <span class="p">,</span> <span class="p">((</span><span class="n" style="color: #333;">first_ty</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="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">field_tys</span></span>
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<pre style="margin: 0;">-<span id="LC358" class="line" lang="haskell">      <span class="p">,</span> <span class="n" style="color: #333;">first_ty</span> <span class="p">`</span><span class="n" style="color: #333;">eqType</span><span class="p">`</span> <span class="n" style="color: #333;">realWorldStatePrimTy</span></span>
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<pre style="margin: 0;">+<span id="LC353" class="line" lang="haskell">    <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">rec_tc</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">+<span id="LC354" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- Found it!</span></span>
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<pre style="margin: 0;">+<span id="LC355" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">ty</span> <span class="p">`</span><span class="n" style="color: #333;">eqType</span><span class="p">`</span>  <span class="n" style="color: #333;">realWorldStatePrimTy</span></span>
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<pre style="margin: 0;"> <span id="LC356" 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="LC360" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- -- Found it!</span></span>
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<pre style="margin: 0;">-<span id="LC361" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- | ty `eqType`  realWorldStatePrimTy</span></span>
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<pre style="margin: 0;">-<span id="LC362" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- = True</span></span>
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<pre style="margin: 0;">-<span id="LC363" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- -- search depth-first</span></span>
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<pre style="margin: 0;">-<span id="LC364" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- | Just (dc, _, field_tys, _) <- deepSplitProductType_maybe fam_envs ty</span></span>
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<pre style="margin: 0;">-<span id="LC365" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- -- don't check the same TyCon twice</span></span>
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<pre style="margin: 0;">-<span id="LC366" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- , Just rec_tc' <- checkRecTc rec_tc (dataConTyCon dc)</span></span>
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<pre style="margin: 0;">-<span id="LC367" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- = any (strict_field_forces rec_tc') field_tys</span></span>
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<pre style="margin: 0;">+<span id="LC357" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- search depth-first</span></span>
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<pre style="margin: 0;">+<span id="LC358" 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="p">(</span><span class="n" style="color: #333;">dc</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">field_tys</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;">deepSplitProductType_maybe</span> <span class="n" style="color: #333;">fam_envs</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">+<span id="LC359" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- don't check the same TyCon twice</span></span>
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<pre style="margin: 0;">+<span id="LC360" class="line" lang="haskell">      <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">rec_tc'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">checkRecTc</span> <span class="n" style="color: #333;">rec_tc</span> <span class="p">(</span><span class="n" style="color: #333;">dataConTyCon</span> <span class="n" style="color: #333;">dc</span><span class="p">)</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC361" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">any</span> <span class="p">(</span><span class="n" style="color: #333;">strict_field_forces</span> <span class="n" style="color: #333;">rec_tc'</span><span class="p">)</span> <span class="n" style="color: #333;">field_tys</span></span>
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<pre style="margin: 0;"> <span id="LC362" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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369
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<td class="diff-line-num new_line" data-linenumber="363" 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">
363
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<pre style="margin: 0;"> <span id="LC363" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="370" 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">
370
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<td class="diff-line-num new_line" data-linenumber="364" 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">
364
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<pre style="margin: 0;"> <span id="LC364" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="371" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
371
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<td class="diff-line-num new_line old" data-linenumber="365" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
 
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<pre style="margin: 0;">-<span id="LC371" class="line" lang="haskell">    <span class="n" style="color: #333;"><span class="idiff left right">_</span>strict_field_forces</span> <span class="n" style="color: #333;">rec_tc</span> <span class="p">(</span><span class="n" style="color: #333;">field_ty</span><span class="p">,</span> <span class="n" style="color: #333;">str_mark</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="372" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="365" 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">
365
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<pre style="margin: 0;">+<span id="LC365" class="line" lang="haskell">    <span class="n" style="color: #333;">strict_field_forces</span> <span class="n" style="color: #333;">rec_tc</span> <span class="p">(</span><span class="n" style="color: #333;">field_ty</span><span class="p">,</span> <span class="n" style="color: #333;">str_mark</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
</pre>
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372
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<td class="diff-line-num new_line" data-linenumber="366" 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">
366
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<pre style="margin: 0;"> <span id="LC366" class="line" lang="haskell">      <span class="p">(</span><span class="n" style="color: #333;">isMarkedStrict</span> <span class="n" style="color: #333;">str_mark</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">isLiftedType_maybe</span> <span class="n" style="color: #333;">field_ty</span> <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;">False</span><span class="p">)</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="373" 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">
373
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<td class="diff-line-num new_line" data-linenumber="367" 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">
367
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<pre style="margin: 0;"> <span id="LC367" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">rec_tc</span> <span class="n" style="color: #333;">field_ty</span></span>
</pre>
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374
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<td class="diff-line-num new_line" data-linenumber="368" 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">
368
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<pre style="margin: 0;"> <span id="LC368" class="line" lang="haskell"></span>
</pre>
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