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<h3>
Sebastian Graf pushed to branch wip/T18249
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/7ae12890cf0c6ba7610c36b78163a9f61b76877e">7ae12890</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-09-16T13:13:01+02:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">More tweaks
</pre>
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<h4>2 changed files:</h4>
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<li class="file-stats">
<a href="#8d8e5922fde8bc19ffa2bc9cae6b6720abb88564">
compiler/GHC/HsToCore/PmCheck/Oracle.hs
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<a href="#a90b29966ba2a86c0f6927651648cb062f00ea03">
compiler/GHC/HsToCore/PmCheck/Types.hs
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<h4>Changes:</h4>
<li id="8d8e5922fde8bc19ffa2bc9cae6b6720abb88564">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7ae12890cf0c6ba7610c36b78163a9f61b76877e#8d8e5922fde8bc19ffa2bc9cae6b6720abb88564"><strong>compiler/GHC/HsToCore/PmCheck/Oracle.hs</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="43" 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">@@ -43,9 +43,10 @@ import GHC.Types.Unique.Set</td>
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<pre style="margin: 0;"> <span id="LC43" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.DSet</span></span>
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<pre style="margin: 0;"> <span id="LC44" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.DFM</span></span>
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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Id</span></span>
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<pre style="margin: 0;">-<span id="LC46" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var.Env</span></span>
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<pre style="margin: 0;">-<span id="LC47" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EvVar</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC46" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Name</span></span>
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<pre style="margin: 0;">+<span id="LC47" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EvVar</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC48" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var.Env</span></span>
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<pre style="margin: 0;">+<span id="LC49" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var.Set</span></span>
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<pre style="margin: 0;"> <span id="LC50" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core</span></span>
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<pre style="margin: 0;"> <span id="LC51" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.FVs</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">exprFreeVars</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC52" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Map</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="85" 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="86" 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">@@ -85,8 +86,6 @@ import Data.Tuple (swap)</td>
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<pre style="margin: 0;"> <span id="LC86" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC87" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Driver.Ppr</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">pprTrace</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC88" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC88" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">reallyUnsafePtrEquality</span><span class="o" style="font-weight: 600;">#</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isTrue</span><span class="o" style="font-weight: 600;">#</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC89" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC89" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Debugging Infrastructure</span></span>
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<pre style="margin: 0;"> <span id="LC90" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC91" class="line" lang="haskell"><span class="n" style="color: #333;">tracePm</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;">SDoc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="nb" style="color: #0086b3;">()</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">@@ -105,8 +104,8 @@ trc :: String -> SDoc -> a -> a</td>
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<pre style="margin: 0;"> <span id="LC104" class="line" lang="haskell"><span class="n" style="color: #333;">trc</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">debugOn</span> <span class="nb" style="color: #0086b3;">()</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprTrace</span></span>
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<pre style="margin: 0;"> <span id="LC105" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;"> <span id="LC106" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC108" class="line" lang="haskell"><span class="n" style="color: #333;">trcM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Monad</span> <span class="n" style="color: #333;">m</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;">SDoc</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">m</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">-<span id="LC109" class="line" lang="haskell"><span class="n" style="color: #333;">trcM</span> <span class="n" style="color: #333;">header</span> <span class="n" style="color: #333;">doc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">trc</span> <span class="n" style="color: #333;">header</span> <span class="n" style="color: #333;">doc</span> <span class="p">(</span><span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC107" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left right">_</span>trcM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Monad</span> <span class="n" style="color: #333;">m</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;">SDoc</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">m</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC108" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left right">_</span>trcM</span> <span class="n" style="color: #333;">header</span> <span class="n" style="color: #333;">doc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">trc</span> <span class="n" style="color: #333;">header</span> <span class="n" style="color: #333;">doc</span> <span class="p">(</span><span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC109" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC110" class="line" lang="haskell"><span class="cd">-- | Generate a fresh `Id` of a given type</span></span>
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<pre style="margin: 0;"> <span id="LC111" class="line" lang="haskell"><span class="n" style="color: #333;">mkPmId</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;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">Id</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">@@ -278,10 +277,11 @@ instCon fuel nabla@MkNabla{nabla_ty_st = ty_st} x con = MaybeT $ do</td>
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<pre style="margin: 0;"> <span id="LC277" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">zipWith</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">tv</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tv</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">char</span> <span class="sc" style="color: #d14;">'↦'</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="n" style="color: #333;">univ_tvs</span> <span class="n" style="color: #333;">arg_tys</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC278" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">gammas</span></span>
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<pre style="margin: 0;"> <span id="LC279" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">dcolon</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">x</span><span class="p">))</span> <span class="n" style="color: #333;">arg_ids</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC280" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">fuel</span></span>
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<pre style="margin: 0;"> <span id="LC281" class="line" lang="haskell"> <span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC282" class="line" lang="haskell"> <span class="n" style="color: #333;">runMaybeT</span> <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="LC283" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">nabla'</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff"><-</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">addPhiCt</span> <span class="n" style="color: #333;">nabla</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PhiConCt</span> <span class="n" style="color: #333;">x</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="n" style="color: #333;">con</span><span class="p">)</span> <span class="n" style="color: #333;">ex_tvs</span> <span class="n" style="color: #333;">gammas</span> <span class="n" style="color: #333;">arg_ids</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC284" class="line" lang="haskell"> <span class="n" style="color: #333;">inhabitationTest</span> <span class="n" style="color: #333;">fuel</span> <span class="p">(</span><span class="n" style="color: #333;">nabla_ty_st</span> <span class="n" style="color: #333;">nabla</span><span class="p">)</span> <span class="n" style="color: #333;">nabla'</span></span>
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<pre style="margin: 0;">+<span id="LC283" class="line" lang="haskell"> <span class="n" style="color: #333;">addPhiCt</span> <span class="n" style="color: #333;">nabla</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PhiConCt</span> <span class="n" style="color: #333;">x</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="n" style="color: #333;">con</span><span class="p">)</span> <span class="n" style="color: #333;">ex_tvs</span> <span class="n" style="color: #333;">gammas</span> <span class="n" style="color: #333;">arg_ids</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC284" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;"><span class="idiff left right">-- </span>inhabitationTest fuel (nabla_ty_st nabla) nabla'</span></span>
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<pre style="margin: 0;"> <span id="LC285" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">nabla</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Could not guess arg_tys. Just assume inhabited</span></span>
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<pre style="margin: 0;"> <span id="LC286" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC287" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Strict fields and variables of unlifted type]</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">@@ -400,7 +400,7 @@ pmTopNormaliseType :: TyState -> Type -> DsM TopNormaliseTypeResult</td>
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<pre style="margin: 0;"> <span id="LC400" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- NB: Normalisation can potentially change kinds, if the head of the type</span></span>
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<pre style="margin: 0;"> <span id="LC401" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- is a type family with a variable result kind. I (Richard E) can't think</span></span>
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402
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<pre style="margin: 0;"> <span id="LC402" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- of a way to cause trouble here, though.</span></span>
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<pre style="margin: 0;">-<span id="LC403" class="line" lang="haskell"><span class="n" style="color: #333;">pmTopNormaliseType</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TySt</span> <span class="n" style="color: #333;">inert</span><span class="p">)</span> <span class="n" style="color: #333;">typ</span></span>
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<pre style="margin: 0;">+<span id="LC403" class="line" lang="haskell"><span class="n" style="color: #333;">pmTopNormaliseType</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TySt</span> <span class="kr" style="font-weight: 600;"><span class="idiff left">_</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">inert</span><span class="p">)</span> <span class="n" style="color: #333;">typ</span></span>
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<pre style="margin: 0;"> <span id="LC404" 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;">env</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">dsGetFamInstEnvs</span></span>
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<pre style="margin: 0;"> <span id="LC405" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Before proceeding, we chuck typ into the constraint solver, in case</span></span>
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<pre style="margin: 0;"> <span id="LC406" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- solving for given equalities may reduce typ some. See</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">@@ -582,7 +582,7 @@ nameTyCt pred_ty = do</td>
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582
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<pre style="margin: 0;"> <span id="LC582" class="line" lang="haskell"><span class="cd">-- | Add some extra type constraints to the 'TyState'; return 'Nothing' if we</span></span>
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583
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583
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<pre style="margin: 0;"> <span id="LC583" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- find a contradiction (e.g. @Int ~ Bool@).</span></span>
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584
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<pre style="margin: 0;"> <span id="LC584" class="line" lang="haskell"><span class="n" style="color: #333;">tyOracle</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TyState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bag</span> <span class="kt" style="color: #458; font-weight: 600;">PredType</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">TyState</span><span class="p">)</span></span>
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585
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<pre style="margin: 0;">-<span id="LC585" class="line" lang="haskell"><span class="n" style="color: #333;">tyOracle</span> <span class="n" style="color: #333;">ty_st</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TySt</span> <span class="n" style="color: #333;">inert</span><span class="p">)</span> <span class="n" style="color: #333;">cts</span></span>
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<pre style="margin: 0;">+<span id="LC585" class="line" lang="haskell"><span class="n" style="color: #333;">tyOracle</span> <span class="n" style="color: #333;">ty_st</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TySt</span> <span class="n" style="color: #333;"><span class="idiff left">n</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">inert</span><span class="p">)</span> <span class="n" style="color: #333;">cts</span></span>
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<pre style="margin: 0;"> <span id="LC586" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isEmptyBag</span> <span class="n" style="color: #333;">cts</span></span>
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<pre style="margin: 0;"> <span id="LC587" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">ty_st</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC588" 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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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -590,7 +590,8 @@ tyOracle ty_st@(TySt inert) cts</td>
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<pre style="margin: 0;"> <span id="LC590" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">tracePm</span> <span class="s" style="color: #d14;">"tyOracle"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">cts</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">inert</span><span class="p">)</span></span>
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591
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<pre style="margin: 0;"> <span id="LC591" class="line" lang="haskell"> <span class="p">;</span> <span class="p">((</span><span class="n" style="color: #333;">_warns</span><span class="p">,</span> <span class="n" style="color: #333;">errs</span><span class="p">),</span> <span class="n" style="color: #333;">res</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">initTcDsForSolver</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">tcCheckSatisfiability</span> <span class="n" style="color: #333;">inert</span> <span class="n" style="color: #333;">evs</span></span>
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592
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<pre style="margin: 0;"> <span id="LC592" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">res</span> <span class="kr" style="font-weight: 600;">of</span></span>
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593
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<pre style="margin: 0;">-<span id="LC593" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">mb_new_inert</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">tracePm</span> <span class="s" style="color: #d14;">"res"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">mb_new_inert</span><span class="p">)</span> <span class="o" style="font-weight: 600;">>></span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TySt</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mb_new_inert</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC593" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- return the new inert set and increment the sequence number n</span></span>
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<pre style="margin: 0;">+<span id="LC594" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">mb_new_inert</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TySt</span> <span class="p">(</span><span class="n" style="color: #333;">n</span><span class="o" style="font-weight: 600;">+</span><span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mb_new_inert</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC595" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"tyOracle"</span> <span class="p">(</span><span class="n" style="color: #333;">vcat</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">pprErrMsgBagWithLoc</span> <span class="n" style="color: #333;">errs</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC596" class="line" lang="haskell"></span>
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597
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<pre style="margin: 0;"> <span id="LC597" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</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">@@ -720,12 +721,11 @@ emptyVarInfo x</td>
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<pre style="margin: 0;"> <span id="LC721" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">vi_neg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">emptyPmAltConSet</span></span>
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722
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<pre style="margin: 0;"> <span id="LC722" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">vi_bot</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MaybeBot</span></span>
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722
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723
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<pre style="margin: 0;"> <span id="LC723" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">vi_rcm</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">emptyRCM</span></span>
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723
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<pre style="margin: 0;">-<span id="LC723" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">vi_dirty</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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724
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<pre style="margin: 0;"> <span id="LC724" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC725" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC726" class="line" lang="haskell"><span class="n" style="color: #333;">lookupVarInfo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarInfo</span></span>
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<pre style="margin: 0;"> <span id="LC727" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (lookupVarInfo tms x) tells what we know about 'x'</span></span>
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<pre style="margin: 0;">-<span id="LC728" class="line" lang="haskell"><span class="n" style="color: #333;">lookupVarInfo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TmSt</span> <span class="n" style="color: #333;">env</span> <span class="kr" style="font-weight: 600;">_</span><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;">fromMaybe</span> <span class="p">(</span><span class="n" style="color: #333;">emptyVarInfo</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">lookupSDIE</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC728" class="line" lang="haskell"><span class="n" style="color: #333;">lookupVarInfo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TmSt</span> <span class="n" style="color: #333;">env</span> <span class="kr" style="font-weight: 600;">_</span><span class="idiff left"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">_</span></span><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;">fromMaybe</span> <span class="p">(</span><span class="n" style="color: #333;">emptyVarInfo</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">lookupSDIE</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC729" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC730" class="line" lang="haskell"><span class="cd">-- | Like @lookupVarInfo ts x@, but @lookupVarInfo ts x = (y, vi)@ also looks</span></span>
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<pre style="margin: 0;"> <span id="LC731" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- through newtype constructors. We have @x ~ N1 (... (Nk y))@ such that the</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">@@ -781,7 +781,7 @@ where you can find the solution in a perhaps more digestible format.</td>
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<pre style="margin: 0;"> <span id="LC781" class="line" lang="haskell"><span class="n" style="color: #333;">lookupRefuts</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Uniquable</span> <span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC782" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Unfortunately we need the extra bit of polymorphism and the unfortunate</span></span>
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<pre style="margin: 0;"> <span id="LC783" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- duplication of lookupVarInfo here.</span></span>
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<pre style="margin: 0;">-<span id="LC784" class="line" lang="haskell"><span class="n" style="color: #333;">lookupRefuts</span> <span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ts</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TmSt</span><span class="idiff left"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">SDIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">_</span></span><span class="p">)</span> <span class="p">}</span> <span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC784" class="line" lang="haskell"><span class="n" style="color: #333;">lookupRefuts</span> <span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ts</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TmSt</span><span class="p"><span class="idiff left">{</span></span><span class="n" style="color: #333;"><span class="idiff">ts_facts</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">SDIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="p"><span class="idiff right">)}</span>)</span> <span class="p">}</span> <span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;"> <span id="LC785" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">lookupUDFM_Directly</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">getUnique</span> <span class="n" style="color: #333;">k</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC786" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>
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<pre style="margin: 0;"> <span id="LC787" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Indirect</span> <span class="n" style="color: #333;">y</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pmAltConSetElems</span> <span class="p">(</span><span class="n" style="color: #333;">vi_neg</span> <span class="p">(</span><span class="n" style="color: #333;">lookupVarInfo</span> <span class="n" style="color: #333;">ts</span> <span class="n" style="color: #333;">y</span><span class="p">))</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">@@ -924,14 +924,14 @@ addPhiCt nabla (PhiNotBotCt x) = addNotBotCt nabla x</td>
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<pre style="margin: 0;"> <span id="LC924" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- surely diverges. Quite similar to 'addConCt', only that it only cares about</span></span>
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<pre style="margin: 0;"> <span id="LC925" 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="LC926" class="line" lang="haskell"><span class="n" style="color: #333;">addBotCt</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MaybeT</span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span></span>
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<pre style="margin: 0;">-<span id="LC927" class="line" lang="haskell"><span class="n" style="color: #333;">addBotCt</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">TmSt</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">reps</span></span> <span class="p">}</span> <span class="n" style="color: #333;">x</span> <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="LC927" class="line" lang="haskell"><span class="n" style="color: #333;">addBotCt</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">ts</span></span><span class="o" style="font-weight: 600;"><span class="idiff">@</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">TmSt</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ts_facts</span></span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">}</span></span> <span class="p">}</span> <span class="n" style="color: #333;">x</span> <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="LC928" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">y</span><span class="p">,</span> <span class="n" style="color: #333;">vi</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="p">{</span> <span class="n" style="color: #333;">vi_bot</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bot</span> <span class="p">})</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lookupVarInfoNT</span> <span class="p">(</span><span class="n" style="color: #333;">nabla_tm_st</span> <span class="n" style="color: #333;">nabla</span><span class="p">)</span> <span class="n" style="color: #333;">x</span></span>
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929
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<pre style="margin: 0;"> <span id="LC929" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">bot</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC930" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IsNotBot</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mzero</span> <span class="c1" style="color: #998; font-style: italic;">-- There was x ≁ ⊥. Contradiction!</span></span>
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931
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<pre style="margin: 0;"> <span id="LC931" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IsBot</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">nabla</span> <span class="c1" style="color: #998; font-style: italic;">-- There already is x ~ ⊥. Nothing left to do</span></span>
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932
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<pre style="margin: 0;"> <span id="LC932" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MaybeBot</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span> <span class="c1" style="color: #998; font-style: italic;">-- We add x ~ ⊥</span></span>
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933
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<pre style="margin: 0;"> <span id="LC933" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">vi'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">vi</span><span class="p">{</span> <span class="n" style="color: #333;">vi_bot</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IsBot</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC934" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">TmSt</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">setEntrySDIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">y</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi'</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">reps</span></span><span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC934" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">ts</span></span><span class="p"><span class="idiff">{</span></span><span class="n" style="color: #333;"><span class="idiff">ts_facts</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">setEntrySDIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">y</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi'</span></span><span class="idiff"> </span><span class="p"><span class="idiff">}</span></span><span class="idiff right"> </span><span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC935" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC936" class="line" lang="haskell"><span class="cd">-- | Record a @x ~/ K@ constraint, e.g. that a particular 'Id' @x@ can't</span></span>
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<pre style="margin: 0;"> <span id="LC937" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- take the shape of a 'PmAltCon' @K@ in the 'Nabla' and return @Nothing@ if</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">@@ -940,30 +940,34 @@ addBotCt nabla@MkNabla{ nabla_tm_st = TmSt env reps } x = do</td>
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<pre style="margin: 0;"> <span id="LC940" class="line" lang="haskell"><span class="n" style="color: #333;">addNotConCt</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MaybeT</span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span></span>
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941
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<pre style="margin: 0;"> <span id="LC941" class="line" lang="haskell"><span class="n" style="color: #333;">addNotConCt</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">dc</span><span class="p">))</span></span>
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942
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<pre style="margin: 0;"> <span id="LC942" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isNewDataCon</span> <span class="n" style="color: #333;">dc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mzero</span> <span class="c1" style="color: #998; font-style: italic;">-- (3) in Note [Coverage checking Newtype matches]</span></span>
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<pre style="margin: 0;">-<span id="LC943" class="line" lang="haskell"><span class="n" style="color: #333;">addNotConCt</span> <span class="n" style="color: #333;">nabla</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">nalt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">overVarInfo</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">nabla</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">+<span id="LC943" class="line" lang="haskell"><span class="n" style="color: #333;">addNotConCt</span> <span class="n" style="color: #333;">nabla</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">nalt</span> <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="LC944" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">mb_mark_dirty</span><span class="p">,</span> <span class="n" style="color: #333;">nabla'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">trvVarInfo</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">nabla</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">+<span id="LC945" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">mb_mark_dirty</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC946" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">markDirty</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">nabla'</span></span>
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<pre style="margin: 0;">+<span id="LC947" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">nabla'</span></span>
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<pre style="margin: 0;"> <span id="LC948" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC945" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">vi</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="kr" style="font-weight: 600;"><span class="idiff left">_</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pos</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">neg</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">rcm</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">_</span></span><span class="p">)</span> <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="LC949" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">vi</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="n" style="color: #333;"><span class="idiff left">x'</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pos</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">neg</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">rcm</span></span><span class="p">)</span> <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="LC950" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- 1. Bail out quickly when nalt contradicts a solution</span></span>
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<pre style="margin: 0;"> <span id="LC951" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">contradicts</span> <span class="n" style="color: #333;">nalt</span> <span class="n" style="color: #333;">sol</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">eqPmAltCon</span> <span class="p">(</span><span class="n" style="color: #333;">paca_con</span> <span class="n" style="color: #333;">sol</span><span class="p">)</span> <span class="n" style="color: #333;">nalt</span> <span class="o" style="font-weight: 600;">==</span> <span class="kt" style="color: #458; font-weight: 600;">Equal</span></span>
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<pre style="margin: 0;"> <span id="LC952" class="line" lang="haskell"> <span class="n" style="color: #333;">guard</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">any</span> <span class="p">(</span><span class="n" style="color: #333;">contradicts</span> <span class="n" style="color: #333;">nalt</span><span class="p">)</span> <span class="n" style="color: #333;">pos</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC953" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- 2. Only record the new fact when it's not already implied by one of the</span></span>
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<pre style="margin: 0;"> <span id="LC954" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- solutions</span></span>
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<pre style="margin: 0;"> <span id="LC955" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">implies</span> <span class="n" style="color: #333;">nalt</span> <span class="n" style="color: #333;">sol</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">eqPmAltCon</span> <span class="p">(</span><span class="n" style="color: #333;">paca_con</span> <span class="n" style="color: #333;">sol</span><span class="p">)</span> <span class="n" style="color: #333;">nalt</span> <span class="o" style="font-weight: 600;">==</span> <span class="kt" style="color: #458; font-weight: 600;">Disjoint</span></span>
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<pre style="margin: 0;">-<span id="LC952" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;"><span class="idiff left right">neg'</span></span></span>
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<pre style="margin: 0;">-<span id="LC953" 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;">implies</span> <span class="n" style="color: #333;">nalt</span><span class="p">)</span> <span class="n" style="color: #333;">pos</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">neg</span></span></span>
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<pre style="margin: 0;">+<span id="LC956" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">neg_changed</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">neg'</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;">+<span id="LC957" 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;">implies</span> <span class="n" style="color: #333;">nalt</span><span class="p">)</span> <span class="n" style="color: #333;">pos</span> <span class="o" style="font-weight: 600;">=</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">False</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">neg</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;"> <span id="LC958" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Completeness checking with required Thetas]</span></span>
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<pre style="margin: 0;">-<span id="LC955" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">hasRequiredTheta</span> <span class="n" style="color: #333;">nalt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">neg</span></span></span>
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<pre style="margin: 0;">-<span id="LC956" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">extendPmAltConSet</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">neg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">nalt</span></span></span>
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<pre style="margin: 0;">+<span id="LC959" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">hasRequiredTheta</span> <span class="n" style="color: #333;">nalt</span> <span class="o" style="font-weight: 600;">=</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">False</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">neg</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;">+<span id="LC960" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">True</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">extendPmAltConSet</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">neg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">nalt</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;"> <span id="LC961" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MASSERT</span><span class="p">(</span> <span class="n" style="color: #333;">isPmAltConMatchStrict</span> <span class="n" style="color: #333;">nalt</span> <span class="p">)</span></span>
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958
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<pre style="margin: 0;">-<span id="LC958" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">vi<span class="idiff left right">1</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">vi</span><span class="p">{</span> <span class="n" style="color: #333;">vi_neg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">neg'</span><span class="p">,</span> <span class="n" style="color: #333;">vi_bot</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IsNotBot</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC962" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">vi<span class="idiff left right">'</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">vi</span><span class="p">{</span> <span class="n" style="color: #333;">vi_neg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">neg'</span><span class="p">,</span> <span class="n" style="color: #333;">vi_bot</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IsNotBot</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC963" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- 3. Make sure there's at least one other possible constructor</span></span>
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<pre style="margin: 0;"> <span id="LC964" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">nalt</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">-<span id="LC961" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="n" style="color: #333;">cl</span> <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="LC965" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="n" style="color: #333;">cl</span> <span class="o" style="font-weight: 600;"><span class="idiff left">|</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">neg_changed</span></span><span class="idiff right"> </span><span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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966
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<pre style="margin: 0;"> <span id="LC966" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Mark dirty to force a delayed inhabitation test</span></span>
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967
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<pre style="margin: 0;"> <span id="LC967" class="line" lang="haskell"> <span class="n" style="color: #333;">rcm'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lift</span> <span class="p">(</span><span class="n" style="color: #333;">markMatched</span> <span class="n" style="color: #333;">cl</span> <span class="n" style="color: #333;">rcm</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC964" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;"><span class="idiff left">vi1</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi_rcm</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">rcm'</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi_dirty</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">True</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">}</span></span></span>
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<pre style="margin: 0;">+<span id="LC968" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Just</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">x'</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi'</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi_rcm</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">rcm'</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">})</span></span></span>
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<pre style="margin: 0;"> <span id="LC969" class="line" lang="haskell"> <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="LC966" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;"><span class="idiff left right">vi1</span></span></span>
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970
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<pre style="margin: 0;">+<span id="LC970" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Nothing</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi'</span></span><span class="p"><span class="idiff right">)</span></span></span>
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967
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971
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<pre style="margin: 0;"> <span id="LC971" class="line" lang="haskell"></span>
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968
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972
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<pre style="margin: 0;"> <span id="LC972" class="line" lang="haskell"><span class="n" style="color: #333;">hasRequiredTheta</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltCon</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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969
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973
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<pre style="margin: 0;"> <span id="LC973" class="line" lang="haskell"><span class="n" style="color: #333;">hasRequiredTheta</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="n" style="color: #333;">cl</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">notNull</span> <span class="n" style="color: #333;">req_theta</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">@@ -1030,60 +1034,85 @@ guessConLikeUnivTyArgsFromResTy _ res_ty (PatSynCon ps) = do</td>
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1030
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1034
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<pre style="margin: 0;"> <span id="LC1034" class="line" lang="haskell"><span class="cd">-- | Adds the constraint @x ~/ ⊥@ to 'Nabla'. Quite similar to 'addNotConCt',</span></span>
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1031
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1035
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<pre style="margin: 0;"> <span id="LC1035" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- but only cares for the ⊥ "constructor".</span></span>
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1032
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1036
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<pre style="margin: 0;"> <span id="LC1036" class="line" lang="haskell"><span class="n" style="color: #333;">addNotBotCt</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MaybeT</span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span></span>
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1033
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<pre style="margin: 0;">-<span id="LC1033" class="line" lang="haskell"><span class="n" style="color: #333;">addNotBotCt</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">TmSt</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">reps</span></span> <span class="p">}</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1037
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<pre style="margin: 0;">+<span id="LC1037" class="line" lang="haskell"><span class="n" style="color: #333;">addNotBotCt</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">ts</span></span><span class="o" style="font-weight: 600;"><span class="idiff">@</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">TmSt</span></span><span class="p"><span class="idiff">{</span></span><span class="n" style="color: #333;"><span class="idiff">ts_facts</span></span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="p"><span class="idiff right">}</span></span> <span class="p">}</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1034
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1038
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<pre style="margin: 0;"> <span id="LC1038" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">y</span><span class="p">,</span> <span class="n" style="color: #333;">vi</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="p">{</span> <span class="n" style="color: #333;">vi_bot</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bot</span> <span class="p">})</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lookupVarInfoNT</span> <span class="p">(</span><span class="n" style="color: #333;">nabla_tm_st</span> <span class="n" style="color: #333;">nabla</span><span class="p">)</span> <span class="n" style="color: #333;">x</span></span>
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1035
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1039
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<pre style="margin: 0;"> <span id="LC1039" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">bot</span> <span class="kr" style="font-weight: 600;">of</span></span>
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1036
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1040
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<pre style="margin: 0;"> <span id="LC1040" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IsBot</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mzero</span> <span class="c1" style="color: #998; font-style: italic;">-- There was x ~ ⊥. Contradiction!</span></span>
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1037
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1041
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<pre style="margin: 0;"> <span id="LC1041" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IsNotBot</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">nabla</span> <span class="c1" style="color: #998; font-style: italic;">-- There already is x ≁ ⊥. Nothing left to do</span></span>
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1038
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1042
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<pre style="margin: 0;"> <span id="LC1042" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MaybeBot</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span> <span class="c1" style="color: #998; font-style: italic;">-- We add x ≁ ⊥ and test if x is still inhabited</span></span>
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1039
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1043
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<pre style="margin: 0;"> <span id="LC1043" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Mark dirty for a delayed inhabitation test</span></span>
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1040
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<pre style="margin: 0;">-<span id="LC1040" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">vi'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">vi</span><span class="p">{</span> <span class="n" style="color: #333;">vi_bot</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IsNotBot</span><span class="p">,</span> <span class="n" style="color: #333;">vi_dirty</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">}</span></span>
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1041
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<pre style="margin: 0;">-<span id="LC1041" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TmSt</span> <span class="p">(</span><span class="n" style="color: #333;">setEntrySDIE</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">y</span> <span class="n" style="color: #333;">vi'</span><span class="p">)</span> <span class="n" style="color: #333;">reps</span><span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC1044" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">vi'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">vi</span><span class="p">{</span> <span class="n" style="color: #333;">vi_bot</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IsNotBot</span><span class="p">}</span></span>
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1045
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<pre style="margin: 0;">+<span id="LC1045" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">markDirty</span> <span class="n" style="color: #333;">y</span></span>
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1046
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<pre style="margin: 0;">+<span id="LC1046" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ts</span><span class="p">{</span> <span class="n" style="color: #333;">ts_facts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setEntrySDIE</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">y</span> <span class="n" style="color: #333;">vi'</span> <span class="p">}</span> <span class="p">}</span></span>
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1047
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<pre style="margin: 0;">+<span id="LC1047" class="line" lang="haskell"></span>
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1048
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<pre style="margin: 0;">+<span id="LC1048" class="line" lang="haskell"><span class="n" style="color: #333;">tyStateChanged</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TyState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyState</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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1049
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<pre style="margin: 0;">+<span id="LC1049" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Makes use of the fact that the two TyStates we compare</span></span>
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1050
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<pre style="margin: 0;">+<span id="LC1050" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- will never have the same sequence number.</span></span>
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1051
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<pre style="margin: 0;">+<span id="LC1051" class="line" lang="haskell"><span class="n" style="color: #333;">tyStateChanged</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ty_st_n</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">/=</span> <span class="n" style="color: #333;">ty_st_n</span> <span class="n" style="color: #333;">b</span></span>
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1052
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<pre style="margin: 0;">+<span id="LC1052" class="line" lang="haskell"></span>
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1053
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<pre style="margin: 0;">+<span id="LC1053" class="line" lang="haskell"><span class="n" style="color: #333;">markDirty</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span></span>
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1054
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<pre style="margin: 0;">+<span id="LC1054" class="line" lang="haskell"><span class="n" style="color: #333;">markDirty</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span><span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ts</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">TmSt</span><span class="p">{</span><span class="n" style="color: #333;">ts_dirty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dirty</span><span class="p">}</span> <span class="p">}</span> <span class="o" style="font-weight: 600;">=</span></span>
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1055
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<pre style="margin: 0;">+<span id="LC1055" class="line" lang="haskell"> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ts</span><span class="p">{</span> <span class="n" style="color: #333;">ts_dirty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extendDVarSet</span> <span class="n" style="color: #333;">dirty</span> <span class="n" style="color: #333;">x</span> <span class="p">}</span> <span class="p">}</span></span>
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1056
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<pre style="margin: 0;">+<span id="LC1056" class="line" lang="haskell"></span>
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1057
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<pre style="margin: 0;">+<span id="LC1057" class="line" lang="haskell"><span class="n" style="color: #333;">traverseDirty</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Monad</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VarInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">m</span> <span class="kt" style="color: #458; font-weight: 600;">VarInfo</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">m</span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span></span>
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1058
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<pre style="margin: 0;">+<span id="LC1058" class="line" lang="haskell"><span class="n" style="color: #333;">traverseDirty</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">ts</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">TmSt</span><span class="p">{</span><span class="n" style="color: #333;">ts_facts</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;">ts_dirty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dirty</span><span class="p">}</span> <span class="o" style="font-weight: 600;">=</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1059" 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">
1059
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<pre style="margin: 0;">+<span id="LC1059" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">uniqDSetToList</span> <span class="n" style="color: #333;">dirty</span><span class="p">)</span> <span class="n" style="color: #333;">env</span></span>
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1060
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<pre style="margin: 0;">+<span id="LC1060" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1061
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<pre style="margin: 0;">+<span id="LC1061" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">ts</span><span class="p">{</span><span class="n" style="color: #333;">ts_facts</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">env</span><span class="p">}</span></span>
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1062
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<pre style="margin: 0;">+<span id="LC1062" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <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;">xs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">env</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1063
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<pre style="margin: 0;">+<span id="LC1063" class="line" lang="haskell"> <span class="n" style="color: #333;">vi'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="n" style="color: #333;">lookupVarInfo</span> <span class="n" style="color: #333;">ts</span> <span class="n" style="color: #333;">x</span><span class="p">)</span></span>
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1064
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<pre style="margin: 0;">+<span id="LC1064" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">xs</span> <span class="p">(</span><span class="n" style="color: #333;">setEntrySDIE</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">vi'</span><span class="p">)</span></span>
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1042
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1065
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<pre style="margin: 0;"> <span id="LC1065" class="line" lang="haskell"></span>
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1043
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<pre style="margin: 0;">-<span id="LC1043" class="line" lang="haskell"><span class="cd">-- | Not as unsafe as it looks! Quite a cheap test.</span></span>
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1044
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<pre style="margin: 0;">-<span id="LC1044" class="line" lang="haskell"><span class="n" style="color: #333;">tyStateUnchanged</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TyState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyState</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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1045
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<pre style="margin: 0;">-<span id="LC1045" class="line" lang="haskell"><span class="n" style="color: #333;">tyStateUnchanged</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span> <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;">reallyUnsafePtrEquality</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span><span class="p">)</span></span>
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1066
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<pre style="margin: 0;">+<span id="LC1066" class="line" lang="haskell"><span class="n" style="color: #333;">traverseAll</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Monad</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VarInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">m</span> <span class="kt" style="color: #458; font-weight: 600;">VarInfo</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">m</span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span></span>
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1067
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<pre style="margin: 0;">+<span id="LC1067" class="line" lang="haskell"><span class="n" style="color: #333;">traverseAll</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">ts</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">TmSt</span><span class="p">{</span><span class="n" style="color: #333;">ts_facts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env</span><span class="p">}</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1068
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<pre style="margin: 0;">+<span id="LC1068" class="line" lang="haskell"> <span class="n" style="color: #333;">env'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">traverseSDIE</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">env</span></span>
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1069
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<pre style="margin: 0;">+<span id="LC1069" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">ts</span><span class="p">{</span><span class="n" style="color: #333;">ts_facts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env'</span><span class="p">}</span></span>
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1046
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1070
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<pre style="margin: 0;"> <span id="LC1070" class="line" lang="haskell"></span>
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1047
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1071
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<pre style="margin: 0;"> <span id="LC1071" class="line" lang="haskell"><span class="n" style="color: #333;">inhabitationTest</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MaybeT</span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span></span>
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1048
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1072
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<pre style="margin: 0;"> <span id="LC1072" class="line" lang="haskell"><span class="n" style="color: #333;">inhabitationTest</span> <span class="mi" style="color: #099;">0</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">nabla</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">nabla</span></span>
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1049
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<td class="diff-line-num new_line old" data-linenumber="1073" 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="LC1049" class="line" lang="haskell"><span class="n" style="color: #333;">inhabitationTest</span> <span class="n" style="color: #333;">fuel</span> <span class="n" style="color: #333;">old_ty_st</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">TmSt</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">reps</span></span><span class="p">}</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1073
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<pre style="margin: 0;">+<span id="LC1073" class="line" lang="haskell"><span class="n" style="color: #333;">inhabitationTest</span> <span class="n" style="color: #333;">fuel</span> <span class="n" style="color: #333;">old_ty_st</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">ts</span></span><span class="idiff right"> </span><span class="p">}</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1050
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1074
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<pre style="margin: 0;"> <span id="LC1074" class="line" lang="haskell"> <span class="n" style="color: #333;">lift</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">tracePm</span> <span class="s" style="color: #d14;">"inhabitation test"</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">vcat</span></span>
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1051
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1075
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<pre style="margin: 0;"> <span id="LC1075" class="line" lang="haskell"> <span class="p">[</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">fuel</span></span>
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1052
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1076
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<pre style="margin: 0;"> <span id="LC1076" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">old_ty_st</span></span>
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1053
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1077
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<pre style="margin: 0;"> <span id="LC1077" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">nabla</span></span>
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1078
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<pre style="margin: 0;">+<span id="LC1078" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"tyStateChanged:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">tyStateChanged</span> <span class="n" style="color: #333;">old_ty_st</span> <span class="p">(</span><span class="n" style="color: #333;">nabla_ty_st</span> <span class="n" style="color: #333;">nabla</span><span class="p">))</span></span>
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1054
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1079
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<pre style="margin: 0;"> <span id="LC1079" class="line" lang="haskell"> <span class="p">]</span></span>
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1080
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<pre style="margin: 0;">+<span id="LC1080" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- When type state didn't change, we only need to traverse dirty VarInfos</span></span>
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1081
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<pre style="margin: 0;">+<span id="LC1081" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">trv_dirty</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">tyStateChanged</span> <span class="n" style="color: #333;">old_ty_st</span> <span class="p">(</span><span class="n" style="color: #333;">nabla_ty_st</span> <span class="n" style="color: #333;">nabla</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">traverseAll</span></span>
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1082
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<pre style="margin: 0;">+<span id="LC1082" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">traverseDirty</span></span>
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1055
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1083
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<pre style="margin: 0;"> <span id="LC1083" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We have to start the inhabitation test with a Nabla where all dirty bits</span></span>
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1056
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1084
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<pre style="margin: 0;"> <span id="LC1084" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- are cleared</span></span>
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1057
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<pre style="margin: 0;">-<span id="LC1057" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">clear_dirty</span> <span class="n" style="color: #333;">vi</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">vi</span><span class="p">{</span><span class="n" style="color: #333;">vi_dirty</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">}</span></span>
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1058
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<pre style="margin: 0;">-<span id="LC1058" class="line" lang="haskell"> <span class="n" style="color: #333;">cleared_env</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">traverseSDIE</span> <span class="n" style="color: #333;">clear_dirty</span> <span class="n" style="color: #333;">env</span></span>
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1059
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<pre style="margin: 0;">-<span id="LC1059" class="line" lang="haskell"> <span class="n" style="color: #333;">env'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">traverseSDIE</span> <span class="p">(</span><span class="n" style="color: #333;">test_one</span> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TmSt</span> <span class="n" style="color: #333;">cleared_env</span> <span class="n" style="color: #333;">reps</span> <span class="p">})</span> <span class="n" style="color: #333;">env</span></span>
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1060
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<pre style="margin: 0;">-<span id="LC1060" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TmSt</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">reps</span> <span class="p">}</span></span>
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1085
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<pre style="margin: 0;">+<span id="LC1085" class="line" lang="haskell"> <span class="n" style="color: #333;">ts'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">trv_dirty</span> <span class="p">(</span><span class="n" style="color: #333;">test_one</span> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ts</span><span class="p">{</span><span class="n" style="color: #333;">ts_dirty</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">emptyDVarSet</span><span class="p">}</span> <span class="p">})</span> <span class="n" style="color: #333;">ts</span></span>
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1086
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<pre style="margin: 0;">+<span id="LC1086" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ts'</span><span class="p">{</span><span class="n" style="color: #333;">ts_dirty</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">emptyDVarSet</span><span class="p">}}</span></span>
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1061
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1087
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<pre style="margin: 0;"> <span id="LC1087" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1062
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1088
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<pre style="margin: 0;"> <span id="LC1088" class="line" lang="haskell"> <span class="n" style="color: #333;">test_one</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MaybeT</span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">VarInfo</span></span>
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1063
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1089
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<pre style="margin: 0;"> <span id="LC1089" class="line" lang="haskell"> <span class="n" style="color: #333;">test_one</span> <span class="n" style="color: #333;">nabla</span> <span class="n" style="color: #333;">vi</span> <span class="o" style="font-weight: 600;">=</span></span>
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1064
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<pre style="margin: 0;">-<span id="LC1064" class="line" lang="haskell"> <span class="n" style="color: #333;">lift</span> <span class="p">(</span><span class="n" style="color: #333;">varNeedsTesting</span> <span class="n" style="color: #333;">old_ty_st</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">nabla_ty_st</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">nabla</span></span><span class="p"><span class="idiff right">)</span></span> <span class="n" style="color: #333;">vi</span><span class="p">)</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">case</span></span>
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1065
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<pre style="margin: 0;">-<span id="LC1065" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="o" style="font-weight: 600;"><span class="idiff left">|</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">null</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">vi_pos</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff right"> </span><span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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1090
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<pre style="margin: 0;">+<span id="LC1090" class="line" lang="haskell"> <span class="n" style="color: #333;">lift</span> <span class="p">(</span><span class="n" style="color: #333;">varNeedsTesting</span> <span class="n" style="color: #333;">old_ty_st</span> <span class="n" style="color: #333;"><span class="idiff left right">nabla</span></span> <span class="n" style="color: #333;">vi</span><span class="p">)</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">case</span></span>
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1091
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<pre style="margin: 0;">+<span id="LC1091" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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1066
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1092
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<pre style="margin: 0;"> <span id="LC1092" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- No solution yet and needs testing</span></span>
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1067
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<pre style="margin: 0;">-<span id="LC1067" class="line" lang="haskell"> <span class="n" style="color: #333;">trcM</span> <span class="s" style="color: #d14;">"instantiate one"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">vi</span><span class="p">)</span></span>
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1093
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<pre style="margin: 0;">+<span id="LC1093" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">_</span>trcM</span> <span class="s" style="color: #d14;">"instantiate one"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">vi</span><span class="p">)</span></span>
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1068
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1094
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<pre style="margin: 0;"> <span id="LC1094" class="line" lang="haskell"> <span class="n" style="color: #333;">instantiate</span> <span class="p">(</span><span class="n" style="color: #333;">fuel</span><span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="n" style="color: #333;">nabla</span> <span class="n" style="color: #333;">vi</span></span>
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1069
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1095
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<pre style="margin: 0;"> <span id="LC1095" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">vi</span></span>
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1070
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1096
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<pre style="margin: 0;"> <span id="LC1096" class="line" lang="haskell"></span>
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1071
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1097
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<pre style="margin: 0;"> <span id="LC1097" class="line" lang="haskell"><span class="cd">-- | Checks whether the given 'VarInfo' needs to be tested for inhabitants.</span></span>
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1072
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1098
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<pre style="margin: 0;"> <span id="LC1098" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1073
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<pre style="margin: 0;">-<span id="LC1073" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 1. If it's marked dirty because of new negative term constraints, we have</span></span>
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1099
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<pre style="margin: 0;">+<span id="LC1099" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 1. If it already has a solution, we don't have to test.</span></span>
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1100
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<pre style="margin: 0;">+<span id="LC1100" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 2. If it's marked dirty because of new negative term constraints, we have</span></span>
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1074
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1101
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<pre style="margin: 0;"> <span id="LC1101" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- to test.</span></span>
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1075
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<pre style="margin: 0;">-<span id="LC1075" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">2</span>. Otherwise, if the type state didn't change, we don't need to test.</span></span>
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1076
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<pre style="margin: 0;">-<span id="LC1076" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">3</span>. If the type state changed, we compare representation types. No need</span></span>
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1102
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<pre style="margin: 0;">+<span id="LC1102" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">3</span>. Otherwise, if the type state didn't change, we don't need to test.</span></span>
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1103
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<pre style="margin: 0;">+<span id="LC1103" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">4</span>. If the type state changed, we compare representation types. No need</span></span>
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1077
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1104
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<pre style="margin: 0;"> <span id="LC1104" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- to test if unchanged.</span></span>
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1078
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<pre style="margin: 0;">-<span id="LC1078" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">4</span>. If all the constructors of a TyCon are vanilla, we don't have to test.</span></span>
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1105
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<pre style="margin: 0;">+<span id="LC1105" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">5</span>. If all the constructors of a TyCon are vanilla, we don't have to test.</span></span>
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1079
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1106
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<pre style="margin: 0;"> <span id="LC1106" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- "vanilla" = No strict fields and no Theta.</span></span>
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1080
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<pre style="margin: 0;">-<span id="LC1080" class="line" lang="haskell"><span class="n" style="color: #333;">varNeedsTesting</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TyState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">-<span id="LC1081" class="line" lang="haskell"><span class="n" style="color: #333;">varNeedsTesting</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">vi</span></span>
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1082
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<pre style="margin: 0;">-<span id="LC1082" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">vi_dirty</span> <span class="n" style="color: #333;">vi</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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1083
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<pre style="margin: 0;">-<span id="LC1083" class="line" lang="haskell"><span class="n" style="color: #333;">varNeedsTesting</span> <span class="n" style="color: #333;">old_ty_st</span> <span class="n" style="color: #333;">new_ty_st</span> <span class="kr" style="font-weight: 600;">_</span></span>
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1107
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<pre style="margin: 0;">+<span id="LC1107" class="line" lang="haskell"><span class="n" style="color: #333;">varNeedsTesting</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TyState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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1108
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<pre style="margin: 0;">+<span id="LC1108" class="line" lang="haskell"><span class="n" style="color: #333;">varNeedsTesting</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">vi</span></span>
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1109
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<pre style="margin: 0;">+<span id="LC1109" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">notNull</span> <span class="p">(</span><span class="n" style="color: #333;">vi_pos</span> <span class="n" style="color: #333;">vi</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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1110
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<pre style="margin: 0;">+<span id="LC1110" class="line" lang="haskell"><span class="n" style="color: #333;">varNeedsTesting</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span><span class="n" style="color: #333;">nabla_tm_st</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">tm_st</span><span class="p">}</span> <span class="n" style="color: #333;">vi</span></span>
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1111
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<pre style="margin: 0;">+<span id="LC1111" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">elemDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">vi_id</span> <span class="n" style="color: #333;">vi</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">ts_dirty</span> <span class="n" style="color: #333;">tm_st</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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1112
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<pre style="margin: 0;">+<span id="LC1112" class="line" lang="haskell"><span class="n" style="color: #333;">varNeedsTesting</span> <span class="n" style="color: #333;">old_ty_st</span> <span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span><span class="n" style="color: #333;">nabla_ty_st</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">new_ty_st</span><span class="p">}</span> <span class="kr" style="font-weight: 600;">_</span></span>
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1084
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1113
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<pre style="margin: 0;"> <span id="LC1113" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Same type state => still inhabited</span></span>
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1085
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<pre style="margin: 0;">-<span id="LC1085" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">tyState<span class="idiff left right">Unc</span>hanged</span> <span class="n" style="color: #333;">old_ty_st</span> <span class="n" style="color: #333;">new_ty_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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1086
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<pre style="margin: 0;">-<span id="LC1086" class="line" lang="haskell"><span class="n" style="color: #333;">varNeedsTesting</span> <span class="n" style="color: #333;">old_ty_st</span> <span class="n" style="color: #333;"><span class="idiff left right">new_ty_st</span></span> <span class="n" style="color: #333;">vi</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1114
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<pre style="margin: 0;">+<span id="LC1114" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">tyState<span class="idiff left right">C</span>hanged</span> <span class="n" style="color: #333;">old_ty_st</span> <span class="n" style="color: #333;">new_ty_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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1115
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<pre style="margin: 0;">+<span id="LC1115" class="line" lang="haskell"><span class="n" style="color: #333;">varNeedsTesting</span> <span class="n" style="color: #333;">old_ty_st</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">MkNabla</span></span><span class="p"><span class="idiff">{</span></span><span class="n" style="color: #333;"><span class="idiff">nabla_ty_st</span></span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="n" style="color: #333;"><span class="idiff">new_ty_st</span></span><span class="p"><span class="idiff right">}</span></span> <span class="n" style="color: #333;">vi</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1087
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1116
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<pre style="margin: 0;"> <span id="LC1116" class="line" lang="haskell"> <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="n" style="color: #333;">old_rep_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tntrGuts</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">pmTopNormaliseType</span> <span class="n" style="color: #333;">old_ty_st</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">vi_id</span> <span class="n" style="color: #333;">vi</span><span class="p">)</span></span>
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1088
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1117
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<pre style="margin: 0;"> <span id="LC1117" class="line" lang="haskell"> <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="n" style="color: #333;">new_rep_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tntrGuts</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">pmTopNormaliseType</span> <span class="n" style="color: #333;">new_ty_st</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">vi_id</span> <span class="n" style="color: #333;">vi</span><span class="p">)</span></span>
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1089
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1118
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<pre style="margin: 0;"> <span id="LC1118" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">old_rep_ty</span> <span class="p">`</span><span class="n" style="color: #333;">eqType</span><span class="p">`</span> <span class="n" style="color: #333;">new_rep_ty</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">@@ -1118,14 +1147,14 @@ instBot _fuel nabla vi = do</td>
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<pre style="margin: 0;"> <span id="LC1147" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">vi</span></span>
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1148
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<pre style="margin: 0;"> <span id="LC1148" class="line" lang="haskell"></span>
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1120
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<pre style="margin: 0;"> <span id="LC1149" class="line" lang="haskell"><span class="n" style="color: #333;">trvVarInfo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Functor</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VarInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="n" style="color: #333;">a</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">VarInfo</span><span class="p">))</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="n" style="color: #333;">a</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span><span class="p">)</span></span>
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1121
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<pre style="margin: 0;">-<span id="LC1121" class="line" lang="haskell"><span class="n" style="color: #333;">trvVarInfo</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ts</span><span class="o" style="font-weight: 600;">@</span><span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">TmSt</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">reps</span></span><span class="p"><span class="idiff right">)</span></span> <span class="p">}</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">+<span id="LC1150" class="line" lang="haskell"><span class="n" style="color: #333;">trvVarInfo</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ts</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">TmSt</span></span><span class="p"><span class="idiff">{</span></span><span class="n" style="color: #333;"><span class="idiff">ts_facts</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">env</span></span><span class="p"><span class="idiff right">}</span></span> <span class="p">}</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;"> <span id="LC1151" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">set_vi</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="n" style="color: #333;">lookupVarInfo</span> <span class="n" style="color: #333;">ts</span> <span class="n" style="color: #333;">x</span><span class="p">)</span></span>
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1152
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<pre style="margin: 0;"> <span id="LC1152" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1124
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1153
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<pre style="margin: 0;"> <span id="LC1153" class="line" lang="haskell"> <span class="n" style="color: #333;">set_vi</span> <span class="p">(</span><span class="n" style="color: #333;">a</span><span class="p">,</span> <span class="n" style="color: #333;">vi'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
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1125
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<pre style="margin: 0;">-<span id="LC1125" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">a</span><span class="p">,</span> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">TmSt</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">setEntrySDIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">vi_id</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi'</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi'</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">reps</span></span> <span class="p">})</span></span>
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<pre style="margin: 0;">+<span id="LC1154" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">a</span><span class="p">,</span> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">ts</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ts_facts</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">setEntrySDIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">vi_id</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi'</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi'</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">}</span></span> <span class="p">})</span></span>
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<pre style="margin: 0;"> <span id="LC1155" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC1127" class="line" lang="haskell"><span class="n" style="color: #333;">overVarInfo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Functor</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VarInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">f</span> <span class="kt" style="color: #458; font-weight: 600;">VarInfo</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">f</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span></span>
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<pre style="margin: 0;">-<span id="LC1128" class="line" lang="haskell"><span class="n" style="color: #333;">overVarInfo</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">nabla</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">snd</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">trvVarInfo</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">vi</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="nb" style="color: #0086b3;">()</span><span class="p">,)</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">vi</span><span class="p">)</span> <span class="n" style="color: #333;">nabla</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">+<span id="LC1156" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;"><span class="idiff left right">--</span>overVarInfo :: Functor f => (VarInfo -> f VarInfo) -> Nabla -> Id -> f Nabla</span></span>
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<pre style="margin: 0;">+<span id="LC1157" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;"><span class="idiff left right">--</span>overVarInfo f nabla x = snd <$> trvVarInfo (\vi -> ((),) <$> f vi) nabla x</span></span>
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1129
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<pre style="margin: 0;"> <span id="LC1158" class="line" lang="haskell"></span>
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1130
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1159
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<pre style="margin: 0;"> <span id="LC1159" class="line" lang="haskell"><span class="n" style="color: #333;">addNormalisedTypeMatches</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ResidualCompleteMatches</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span><span class="p">)</span></span>
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1131
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1160
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<pre style="margin: 0;"> <span id="LC1160" class="line" lang="haskell"><span class="n" style="color: #333;">addNormalisedTypeMatches</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_ty_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ty_st</span> <span class="p">}</span> <span class="n" style="color: #333;">x</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">@@ -1204,7 +1233,7 @@ instCompleteSet fuel nabla x cs</td>
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1204
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1233
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<pre style="margin: 0;"> <span id="LC1233" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1205
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1234
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<pre style="margin: 0;"> <span id="LC1234" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [TmState invariants].</span></span>
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1206
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1235
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<pre style="margin: 0;"> <span id="LC1235" class="line" lang="haskell"><span class="n" style="color: #333;">addVarCt</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MaybeT</span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span></span>
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1207
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<pre style="margin: 0;">-<span id="LC1207" class="line" lang="haskell"><span class="n" style="color: #333;">addVarCt</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TmSt</span><span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">_</span></span> <span class="p">}</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span></span>
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1236
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<pre style="margin: 0;">+<span id="LC1236" class="line" lang="haskell"><span class="n" style="color: #333;">addVarCt</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TmSt</span><span class="p"><span class="idiff left">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ts_facts</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">env</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">}</span></span> <span class="p">}</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span></span>
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1208
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1237
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<pre style="margin: 0;"> <span id="LC1237" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's important that we never @equate@ two variables of the same equivalence</span></span>
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1209
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1238
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<pre style="margin: 0;"> <span id="LC1238" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- class, otherwise we might get cyclic substitutions.</span></span>
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1210
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1239
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<pre style="margin: 0;"> <span id="LC1239" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Cf. 'extendSubstAndSolve' and</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">@@ -1220,11 +1249,11 @@ addVarCt nabla@MkNabla{ nabla_tm_st = TmSt env _ } x y</td>
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1220
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1249
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<pre style="margin: 0;"> <span id="LC1249" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1221
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1250
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<pre style="margin: 0;"> <span id="LC1250" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [TmState invariants].</span></span>
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1222
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1251
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<pre style="margin: 0;"> <span id="LC1251" class="line" lang="haskell"><span class="n" style="color: #333;">equate</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MaybeT</span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span></span>
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1223
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<pre style="margin: 0;">-<span id="LC1223" class="line" lang="haskell"><span class="n" style="color: #333;">equate</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">TmSt</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">reps</span></span> <span class="p">}</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span></span>
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1252
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<pre style="margin: 0;">+<span id="LC1252" class="line" lang="haskell"><span class="n" style="color: #333;">equate</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">ts</span></span><span class="o" style="font-weight: 600;"><span class="idiff">@</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">TmSt</span></span><span class="p"><span class="idiff">{</span></span><span class="n" style="color: #333;"><span class="idiff">ts_facts</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">env</span></span><span class="p"><span class="idiff right">}</span></span> <span class="p">}</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span></span>
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1224
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1253
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<pre style="margin: 0;"> <span id="LC1253" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">sameRepresentativeSDIE</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span><span class="p">)</span> <span class="p">)</span></span>
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1225
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1254
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<pre style="margin: 0;"> <span id="LC1254" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="p">(</span><span class="n" style="color: #333;">lookupSDIE</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">lookupSDIE</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">y</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1226" 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">
1226
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<td class="diff-line-num new_line old" data-linenumber="1255" 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="LC1226" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Nothing</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;">pure</span> <span class="p">(</span><span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">TmSt</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">setIndirectSDIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">x</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">y</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">reps</span></span> <span class="p">})</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1227" 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">
1227
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<td class="diff-line-num new_line old" data-linenumber="1255" 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="LC1227" class="line" lang="haskell"> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">TmSt</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">setIndirectSDIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">y</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">x</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">reps</span></span> <span class="p">})</span></span>
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1255
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<pre style="margin: 0;">+<span id="LC1255" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Nothing</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;">pure</span> <span class="p">(</span><span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">ts</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ts_facts</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">setIndirectSDIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">x</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">y</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">}</span></span> <span class="p">})</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1256" 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">
1256
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<pre style="margin: 0;">+<span id="LC1256" class="line" lang="haskell"> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">ts</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ts_facts</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">setIndirectSDIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">y</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">x</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">}</span></span> <span class="p">})</span></span>
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1228
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<td class="diff-line-num new_line" data-linenumber="1257" 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">
1257
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<pre style="margin: 0;"> <span id="LC1257" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Merge the info we have for x into the info for y</span></span>
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<td class="diff-line-num old_line" data-linenumber="1229" 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">
1229
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<td class="diff-line-num new_line" data-linenumber="1258" 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">
1258
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<pre style="margin: 0;"> <span id="LC1258" 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;">vi_x</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">vi_y</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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<td class="diff-line-num old_line" data-linenumber="1230" 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">
1230
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1259
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<pre style="margin: 0;"> <span id="LC1259" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- This assert will probably trigger at some point...</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1234" 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="1263" 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">@@ -1234,7 +1263,7 @@ equate nabla@MkNabla{ nabla_tm_st = TmSt env reps } x y</td>
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1234
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1263
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<pre style="margin: 0;"> <span id="LC1263" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">env_ind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setIndirectSDIE</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span></span>
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<td class="diff-line-num old_line" data-linenumber="1235" 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">
1235
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<td class="diff-line-num new_line" data-linenumber="1264" 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">
1264
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<pre style="margin: 0;"> <span id="LC1264" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Then sum up the refinement counters</span></span>
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1236
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<td class="diff-line-num new_line" data-linenumber="1265" 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">
1265
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<pre style="margin: 0;"> <span id="LC1265" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">env_refs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setEntrySDIE</span> <span class="n" style="color: #333;">env_ind</span> <span class="n" style="color: #333;">y</span> <span class="n" style="color: #333;">vi_y</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1237" 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">
1237
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<td class="diff-line-num new_line old" data-linenumber="1266" 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="LC1237" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">nabla_refs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">TmSt</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env_refs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">reps</span></span> <span class="p">}</span></span>
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<td class="diff-line-num new old_line" data-linenumber="1238" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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1266
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<pre style="margin: 0;">+<span id="LC1266" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">nabla_refs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">ts</span></span><span class="p"><span class="idiff">{</span></span><span class="n" style="color: #333;"><span class="idiff">ts_facts</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">env_refs</span></span><span class="p"><span class="idiff right">}</span></span> <span class="p">}</span></span>
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1238
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1267
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<pre style="margin: 0;"> <span id="LC1267" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- and then gradually merge every positive fact we have on x into y</span></span>
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<td class="diff-line-num old_line" data-linenumber="1239" 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">
1239
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1268
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<pre style="margin: 0;"> <span id="LC1268" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">add_fact</span> <span class="n" style="color: #333;">nabla</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PACA</span> <span class="n" style="color: #333;">cl</span> <span class="n" style="color: #333;">tvs</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addConCt</span> <span class="n" style="color: #333;">nabla</span> <span class="n" style="color: #333;">y</span> <span class="n" style="color: #333;">cl</span> <span class="n" style="color: #333;">tvs</span> <span class="n" style="color: #333;">args</span></span>
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1240
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1269
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<pre style="margin: 0;"> <span id="LC1269" class="line" lang="haskell"> <span class="n" style="color: #333;">nabla_pos</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">foldlM</span> <span class="n" style="color: #333;">add_fact</span> <span class="n" style="color: #333;">nabla_refs</span> <span class="p">(</span><span class="n" style="color: #333;">vi_pos</span> <span class="n" style="color: #333;">vi_x</span><span class="p">)</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">@@ -1252,8 +1281,8 @@ equate nabla@MkNabla{ nabla_tm_st = TmSt env reps } x y</td>
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1252
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1281
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<pre style="margin: 0;"> <span id="LC1281" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1253
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1282
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<pre style="margin: 0;"> <span id="LC1282" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [TmState invariants].</span></span>
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1254
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1283
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<pre style="margin: 0;"> <span id="LC1283" class="line" lang="haskell"><span class="n" style="color: #333;">addConCt</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyVar</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Id</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MaybeT</span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">Nabla</span></span>
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1255
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<pre style="margin: 0;">-<span id="LC1255" class="line" lang="haskell"><span class="n" style="color: #333;">addConCt</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ts</span><span class="o" style="font-weight: 600;">@</span><span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">TmSt</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">reps</span></span><span class="p"><span class="idiff right">)</span></span> <span class="p">}</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">alt</span> <span class="n" style="color: #333;">tvs</span> <span class="n" style="color: #333;">args</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1256
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<pre style="margin: 0;">-<span id="LC1256" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">vi</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">pos</span> <span class="n" style="color: #333;">neg</span> <span class="n" style="color: #333;">bot</span> <span class="kr" style="font-weight: 600;">_</span><span class="idiff left"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">_</span></span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lookupVarInfo</span> <span class="n" style="color: #333;">ts</span> <span class="n" style="color: #333;">x</span></span>
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1284
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<pre style="margin: 0;">+<span id="LC1284" class="line" lang="haskell"><span class="n" style="color: #333;">addConCt</span> <span class="n" style="color: #333;">nabla</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkNabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ts</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">TmSt</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ts_facts</span></span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">}</span></span> <span class="p">}</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">alt</span> <span class="n" style="color: #333;">tvs</span> <span class="n" style="color: #333;">args</span> <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="LC1285" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">vi</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">pos</span> <span class="n" style="color: #333;">neg</span> <span class="n" style="color: #333;">bot</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;">lookupVarInfo</span> <span class="n" style="color: #333;">ts</span> <span class="n" style="color: #333;">x</span></span>
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1257
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1286
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<pre style="margin: 0;"> <span id="LC1286" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- First try to refute with a negative fact</span></span>
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1258
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1287
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<pre style="margin: 0;"> <span id="LC1287" class="line" lang="haskell"> <span class="n" style="color: #333;">guard</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">elemPmAltConSet</span> <span class="n" style="color: #333;">alt</span> <span class="n" style="color: #333;">neg</span><span class="p">))</span></span>
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1259
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1288
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<pre style="margin: 0;"> <span id="LC1288" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Then see if any of the other solutions (remember: each of them is an</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">@@ -1274,7 +1303,7 @@ addConCt nabla@MkNabla{ nabla_tm_st = ts@(TmSt env reps) } x alt tvs args = do</td>
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1274
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1303
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<pre style="margin: 0;"> <span id="LC1303" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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1275
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1304
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<pre style="margin: 0;"> <span id="LC1304" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">pos'</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PACA</span> <span class="n" style="color: #333;">alt</span> <span class="n" style="color: #333;">tvs</span> <span class="n" style="color: #333;">args</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">pos</span></span>
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1276
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1305
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<pre style="margin: 0;"> <span id="LC1305" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">nabla_with</span> <span class="n" style="color: #333;">bot'</span> <span class="o" style="font-weight: 600;">=</span></span>
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1277
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<pre style="margin: 0;">-<span id="LC1277" class="line" lang="haskell"> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">TmSt</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">setEntrySDIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">x</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">vi</span></span><span class="p"><span class="idiff">{</span></span><span class="n" style="color: #333;"><span class="idiff">vi_pos</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">pos'</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi_bot</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">bot'</span></span><span class="p"><span class="idiff">}))</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">reps</span></span><span class="p">}</span></span>
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1306
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<pre style="margin: 0;">+<span id="LC1306" class="line" lang="haskell"> <span class="n" style="color: #333;">nabla</span><span class="p">{</span> <span class="n" style="color: #333;">nabla_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">ts</span></span><span class="p"><span class="idiff">{</span></span><span class="n" style="color: #333;"><span class="idiff">ts_facts</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">setEntrySDIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">x</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">vi</span></span><span class="p"><span class="idiff">{</span></span><span class="n" style="color: #333;"><span class="idiff">vi_pos</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">pos'</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi_bot</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">bot'</span></span><span class="p"><span class="idiff">})}</span></span><span class="idiff right"> </span><span class="p">}</span></span>
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1278
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1307
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<pre style="margin: 0;"> <span id="LC1307" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Do (2) in Note [Coverage checking Newtype matches]</span></span>
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1279
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1308
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<pre style="margin: 0;"> <span id="LC1308" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="p">(</span><span class="n" style="color: #333;">alt</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">of</span></span>
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1280
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1309
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<pre style="margin: 0;"> <span id="LC1309" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">dc</span><span class="p">),</span> <span class="p">[</span><span class="n" style="color: #333;">y</span><span class="p">])</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isNewDataCon</span> <span class="n" style="color: #333;">dc</span> <span class="o" style="font-weight: 600;">-></span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1527" 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="1556" 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">@@ -1527,7 +1556,7 @@ generateInhabitants _ 0 _ = pure []</td>
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1527
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1556
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<pre style="margin: 0;"> <span id="LC1556" class="line" lang="haskell"><span class="n" style="color: #333;">generateInhabitants</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">nabla</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pure</span> <span class="p">[</span><span class="n" style="color: #333;">nabla</span><span class="p">]</span></span>
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1528
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1557
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<pre style="margin: 0;"> <span id="LC1557" class="line" lang="haskell"><span class="n" style="color: #333;">generateInhabitants</span> <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;">xs</span><span class="p">)</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">nabla</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1529
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1558
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<pre style="margin: 0;"> <span id="LC1558" class="line" lang="haskell"> <span class="n" style="color: #333;">tracePm</span> <span class="s" style="color: #d14;">"generateInhabitants"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">xs</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">nabla</span><span class="p">)</span></span>
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1530
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<pre style="margin: 0;">-<span id="LC1530" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">pos</span> <span class="n" style="color: #333;">neg</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 class="idiff left">_</span></span><span class="idiff right"> </span><span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lookupVarInfo</span> <span class="p">(</span><span class="n" style="color: #333;">nabla_tm_st</span> <span class="n" style="color: #333;">nabla</span><span class="p">)</span> <span class="n" style="color: #333;">x</span></span>
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1559
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<pre style="margin: 0;">+<span id="LC1559" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">pos</span> <span class="n" style="color: #333;">neg</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;">lookupVarInfo</span> <span class="p">(</span><span class="n" style="color: #333;">nabla_tm_st</span> <span class="n" style="color: #333;">nabla</span><span class="p">)</span> <span class="n" style="color: #333;">x</span></span>
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1531
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1560
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<pre style="margin: 0;"> <span id="LC1560" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">pos</span> <span class="kr" style="font-weight: 600;">of</span></span>
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1532
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1561
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<pre style="margin: 0;"> <span id="LC1561" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span><span class="o" style="font-weight: 600;">:</span><span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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1533
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1562
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<pre style="margin: 0;"> <span id="LC1562" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- All solutions must be valid at once. Try to find candidates for their</span></span>
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<li id="a90b29966ba2a86c0f6927651648cb062f00ea03">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7ae12890cf0c6ba7610c36b78163a9f61b76877e#a90b29966ba2a86c0f6927651648cb062f00ea03"><strong>compiler/GHC/HsToCore/PmCheck/Types.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">@@ -49,6 +49,7 @@ import GHC.Data.Bag</td>
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49
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<pre style="margin: 0;"> <span id="LC49" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.FastString</span></span>
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<pre style="margin: 0;"> <span id="LC50" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Id</span></span>
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<pre style="margin: 0;"> <span id="LC51" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var.Env</span></span>
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<pre style="margin: 0;">+<span id="LC52" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var.Set</span></span>
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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.DSet</span></span>
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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.DFM</span></span>
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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Name</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">@@ -521,6 +522,9 @@ data TmState</td>
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<pre style="margin: 0;"> <span id="LC522" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ^ An environment for looking up whether we already encountered semantically</span></span>
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523
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<pre style="margin: 0;"> <span id="LC523" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- equivalent expressions that we want to represent by the same 'Id'</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;">-- representative.</span></span>
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<pre style="margin: 0;">+<span id="LC525" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ts_dirty</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="kt" style="color: #458; font-weight: 600;">DIdSet</span></span>
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<pre style="margin: 0;">+<span id="LC526" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ^ Which 'VarInfo' needs to be checked for inhabitants because of new</span></span>
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<pre style="margin: 0;">+<span id="LC527" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- negative constraints (e.g. @x ≁ ⊥@ or @x ≁ K@).</span></span>
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<pre style="margin: 0;"> <span id="LC528" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC529" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC530" class="line" lang="haskell"><span class="cd">-- | Information about an 'Id'. Stores positive ('vi_pos') facts, like @x ~ Just 42@,</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">@@ -573,10 +577,6 @@ data VarInfo</td>
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<pre style="margin: 0;"> <span id="LC577" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- possible constructors of each COMPLETE set. So, if it's not in here, we</span></span>
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574
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<pre style="margin: 0;"> <span id="LC578" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- can't possibly match on it. Complementary to 'vi_neg'. We still need it</span></span>
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579
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<pre style="margin: 0;"> <span id="LC579" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- to recognise completion of a COMPLETE set efficiently for large enums.</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="LC577" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">vi_dirty</span> <span class="o" style="font-weight: 600;">::</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="LC578" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ^ Whether this 'VarInfo' needs to be checked for inhabitants because of new</span></span>
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<pre style="margin: 0;">-<span id="LC579" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- negative constraints (e.g. @x ≁ ⊥@ or @x ≁ K@).</span></span>
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580
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580
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<pre style="margin: 0;"> <span id="LC580" class="line" lang="haskell"> <span class="p">}</span></span>
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581
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<pre style="margin: 0;"> <span id="LC581" class="line" lang="haskell"></span>
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582
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<pre style="margin: 0;"> <span id="LC582" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltConApp</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">@@ -604,35 +604,34 @@ instance Outputable BotInfo where</td>
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<pre style="margin: 0;"> <span id="LC604" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC605" class="line" lang="haskell"><span class="cd">-- | Not user-facing.</span></span>
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<pre style="margin: 0;"> <span id="LC606" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span> <span class="kr" style="font-weight: 600;">where</span></span>
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607
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<pre style="margin: 0;">-<span id="LC607" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TmSt</span> <span class="n" style="color: #333;">state</span> <span class="n" style="color: #333;">reps</span><span class="p"><span class="idiff left">)</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">state</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">reps</span></span></span>
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<pre style="margin: 0;">+<span id="LC607" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TmSt</span> <span class="n" style="color: #333;">state</span> <span class="n" style="color: #333;">reps</span><span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff">dirty</span></span><span class="p"><span class="idiff">)</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">state</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$$</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">reps</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$$</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">dirty</span></span></span>
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<pre style="margin: 0;"> <span id="LC608" class="line" lang="haskell"></span>
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609
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<pre style="margin: 0;"> <span id="LC609" class="line" lang="haskell"><span class="cd">-- | Not user-facing.</span></span>
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610
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<pre style="margin: 0;"> <span id="LC610" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">VarInfo</span> <span class="kr" style="font-weight: 600;">where</span></span>
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611
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<pre style="margin: 0;">-<span id="LC611" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">pos</span> <span class="n" style="color: #333;">neg</span> <span class="n" style="color: #333;">bot</span> <span class="n" style="color: #333;">cache</span><span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff right">dirty</span></span><span class="p">)</span></span>
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612
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<pre style="margin: 0;">-<span id="LC612" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">braces</span> <span class="p">(</span><span class="n" style="color: #333;">hcat</span> <span class="p">(</span><span class="n" style="color: #333;">punctuate</span> <span class="n" style="color: #333;">comma</span> <span class="p">[</span><span class="n" style="color: #333;">pp_x</span><span class="p">,</span> <span class="n" style="color: #333;">pp_pos</span><span class="p">,</span> <span class="n" style="color: #333;">pp_neg</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">bot</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">cache</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">pp_dirty</span></span><span class="p">]))</span></span>
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<pre style="margin: 0;">+<span id="LC611" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">pos</span> <span class="n" style="color: #333;">neg</span> <span class="n" style="color: #333;">bot</span> <span class="n" style="color: #333;">cache</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC612" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">braces</span> <span class="p">(</span><span class="n" style="color: #333;">hcat</span> <span class="p">(</span><span class="n" style="color: #333;">punctuate</span> <span class="n" style="color: #333;">comma</span> <span class="p">[</span><span class="n" style="color: #333;">pp_x</span><span class="p">,</span> <span class="n" style="color: #333;">pp_pos</span><span class="p">,</span> <span class="n" style="color: #333;">pp_neg</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">bot</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">cache</span><span class="p">]))</span></span>
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<pre style="margin: 0;"> <span id="LC613" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC614" class="line" lang="haskell"> <span class="n" style="color: #333;">pp_x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">dcolon</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">x</span><span class="p">)</span></span>
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615
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615
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<pre style="margin: 0;"> <span id="LC615" class="line" lang="haskell"> <span class="n" style="color: #333;">pp_pos</span></span>
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616
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<pre style="margin: 0;"> <span id="LC616" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">[</span><span class="n" style="color: #333;">p</span><span class="p">]</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pos</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">char</span> <span class="sc" style="color: #d14;">'~'</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">p</span> <span class="c1" style="color: #998; font-style: italic;">-- suppress outer [_] if singleton</span></span>
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617
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617
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<pre style="margin: 0;"> <span id="LC617" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">char</span> <span class="sc" style="color: #d14;">'~'</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">pos</span></span>
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618
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618
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<pre style="margin: 0;"> <span id="LC618" class="line" lang="haskell"> <span class="n" style="color: #333;">pp_neg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">char</span> <span class="sc" style="color: #d14;">'≁'</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">neg</span></span>
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619
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<pre style="margin: 0;">-<span id="LC619" class="line" lang="haskell"> <span class="n" style="color: #333;">pp_dirty</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">dirty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"dirty"</span></span>
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<pre style="margin: 0;">-<span id="LC620" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">empty</span></span>
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<pre style="margin: 0;"> <span id="LC619" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC620" class="line" lang="haskell"><span class="cd">-- | Initial state of the term oracle.</span></span>
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<pre style="margin: 0;"> <span id="LC621" class="line" lang="haskell"><span class="n" style="color: #333;">initTmState</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span></span>
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<pre style="margin: 0;">-<span id="LC624" class="line" lang="haskell"><span class="n" style="color: #333;">initTmState</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TmSt</span> <span class="n" style="color: #333;">emptySDIE</span> <span class="n" style="color: #333;">emptyCoreMap</span></span>
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<pre style="margin: 0;">+<span id="LC622" class="line" lang="haskell"><span class="n" style="color: #333;">initTmState</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TmSt</span> <span class="n" style="color: #333;">emptySDIE</span> <span class="n" style="color: #333;">emptyCoreMap</span><span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff right">emptyDVarSet</span></span></span>
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<pre style="margin: 0;"> <span id="LC623" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC624" class="line" lang="haskell"><span class="cd">-- | The type oracle state. An 'GHC.Tc.Solver.Monad.InsertSet' that we</span></span>
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<pre style="margin: 0;">-<span id="LC627" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- incrementally add local type constraints to.</span></span>
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<pre style="margin: 0;">-<span id="LC628" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">TyState</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TySt</span> <span class="kt" style="color: #458; font-weight: 600;">InertSet</span></span>
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<pre style="margin: 0;">+<span id="LC625" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- incrementally add local type constraints to, together with a sequence</span></span>
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<pre style="margin: 0;">+<span id="LC626" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- number that counts the number of times we extended it with new facts.</span></span>
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<pre style="margin: 0;">+<span id="LC627" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">TyState</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TySt</span> <span class="p">{</span> <span class="n" style="color: #333;">ty_st_n</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">,</span> <span class="n" style="color: #333;">ty_st_inert</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="kt" style="color: #458; font-weight: 600;">InertSet</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC628" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC629" class="line" lang="haskell"><span class="cd">-- | Not user-facing.</span></span>
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<pre style="margin: 0;"> <span id="LC630" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">TyState</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC632" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TySt</span> <span class="n" style="color: #333;"><span class="idiff left">inert</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">=</span></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">inert</span></span>
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<pre style="margin: 0;">+<span id="LC631" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TySt</span> <span class="n" style="color: #333;"><span class="idiff left">n</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">inert</span></span><span class="p"><span class="idiff">)</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">n</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right"><+></span></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">inert</span></span>
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<pre style="margin: 0;"> <span id="LC632" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC633" class="line" lang="haskell"><span class="n" style="color: #333;">initTyState</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TyState</span></span>
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<pre style="margin: 0;">-<span id="LC635" class="line" lang="haskell"><span class="n" style="color: #333;">initTyState</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TySt</span> <span class="n" style="color: #333;">emptyInert</span></span>
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<pre style="margin: 0;">+<span id="LC634" class="line" lang="haskell"><span class="n" style="color: #333;">initTyState</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TySt</span> <span class="mi" style="color: #099;"><span class="idiff left">0</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">emptyInert</span></span>
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<pre style="margin: 0;"> <span id="LC635" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC636" class="line" lang="haskell"><span class="cd">-- | A normalised refinement type ∇ (\"nabla\"), comprised of an inert set of</span></span>
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<pre style="margin: 0;"> <span id="LC637" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- canonical (i.e. mutually compatible) term and type constraints that form the</span></span>
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