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<h3>

Ben Gamari pushed to branch wip/T16742

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/1b50fdcb68d92861c0801ce8a99bb318edbc5ca9">1b50fdcb</a></strong>

<div>

<span>by Ben Gamari</span>

<i>at 2019-06-04T03:44:27Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Allow runtimeError applications under let/app invariant

PrelRules.shiftRule can now rewrite Int# expressions to bottom due to

the invalid-shift check introduced by

1503da32d26fb59fb6ebb620bfd0f8c08638f627. To accomodate this we allow

known-bottoming expressions under the let/app invariant.

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/802035236788df8168345c84b10fb012ef1c21df">80203523</a></strong>

<div>

<span>by Ben Gamari</span>

<i>at 2019-06-04T03:44:27Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">PrelRules: Ensure that shift rule result type is correct

Previously shiftRule would always produce a wordPrimTy result, despite

the fact that some of the primops which it handled were of type

intPrimTy.

</pre>

</li>

</ul>

<h4>3 changed files:</h4>

<ul>

<li class="file-stats">

<a href="#da5742c4b404a672740f0eef71683f5a8dd3818e">

compiler/coreSyn/CoreLint.hs

</a>

</li>

<li class="file-stats">

<a href="#c51feff1097e886121a45f5d4b0baf4d9793d59e">

compiler/coreSyn/CoreSyn.hs

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</li>

<li class="file-stats">

<a href="#844514241b3e1a009f66bf594cbb57fef61482fb">

compiler/prelude/PrelRules.hs

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</li>

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<h4>Changes:</h4>

<li id="da5742c4b404a672740f0eef71683f5a8dd3818e">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/3c44d90954a64d83217f300e6508a21f13ccbb70...802035236788df8168345c84b10fb012ef1c21df#da5742c4b404a672740f0eef71683f5a8dd3818e"><strong>compiler/coreSyn/CoreLint.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="536" 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="536" 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">@@ -536,7 +536,8 @@ lintSingleBinding top_lvl_flag rec_flag (binder,rhs)</td>

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536

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536

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<pre style="margin: 0;"> <span id="LC536" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">checkL</span> <span class="p">(</span> <span class="n" style="color: #333;">isJoinId</span> <span class="n" style="color: #333;">binder</span></span>

</pre>

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537

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537

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<pre style="margin: 0;"> <span id="LC537" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isUnliftedType</span> <span class="n" style="color: #333;">binder_ty</span><span class="p">)</span></span>

</pre>

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538

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538

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<pre style="margin: 0;"> <span id="LC538" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">||</span> <span class="p">(</span><span class="n" style="color: #333;">isNonRec</span> <span class="n" style="color: #333;">rec_flag</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">exprOkForSpeculation</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span></span>

</pre>

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539

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<pre style="margin: 0;">-<span id="LC539" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">exprIsTickedString</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span></span>

</pre>

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539

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<pre style="margin: 0;">+<span id="LC539" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">exprIsTickedString</span> <span class="n" style="color: #333;">rhs</span></span>

</pre>

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540

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<pre style="margin: 0;">+<span id="LC540" class="line" lang="haskell">                <span class="p">)</span></span>

</pre>

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540

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541

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<pre style="margin: 0;"> <span id="LC541" class="line" lang="haskell">           <span class="p">(</span><span class="n" style="color: #333;">badBndrTyMsg</span> <span class="n" style="color: #333;">binder</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"unlifted"</span><span class="p">))</span></span>

</pre>

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541

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542

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<pre style="margin: 0;"> <span id="LC542" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC543" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Check that if the binder is top-level or recursive, it's not</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1018" 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="1019" 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">@@ -1018,7 +1019,7 @@ lintCoreArg fun_ty arg</td>

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1018

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<pre style="margin: 0;"> <span id="LC1019" class="line" lang="haskell">             <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">arg</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;">parens</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">arg_ty</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;">typeKind</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">))))</span></span>

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<pre style="margin: 0;"> <span id="LC1020" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- check for levity polymorphism first, because otherwise isUnliftedType panics</span></span>

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<pre style="margin: 0;"> <span id="LC1021" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC1021" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">checkL</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isUnliftedType</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">exprOkForSpeculation</span> <span class="n" style="color: #333;">arg</span><span class="p">)</span></span>

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1022

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<pre style="margin: 0;">+<span id="LC1022" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">checkL</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isUnliftedType</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">exprOkForSpeculation</span> <span class="n" style="color: #333;">arg</span><span class="idiff left"> </span><span class="o" style="font-weight: 600;"><span class="idiff">||</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">exprIsBottom</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">arg</span></span><span class="p">)</span></span>

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1022

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1023

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<pre style="margin: 0;"> <span id="LC1023" class="line" lang="haskell">                <span class="p">(</span><span class="n" style="color: #333;">mkLetAppMsg</span> <span class="n" style="color: #333;">arg</span><span class="p">)</span></span>

</pre>

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1023

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1024

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<pre style="margin: 0;"> <span id="LC1024" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">lintValApp</span> <span class="n" style="color: #333;">arg</span> <span class="n" style="color: #333;">fun_ty</span> <span class="n" style="color: #333;">arg_ty</span> <span class="p">}</span></span>

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1024

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1025

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<pre style="margin: 0;"> <span id="LC1025" class="line" lang="haskell"></span>

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<br>

</li>

<li id="c51feff1097e886121a45f5d4b0baf4d9793d59e">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/3c44d90954a64d83217f300e6508a21f13ccbb70...802035236788df8168345c84b10fb012ef1c21df#c51feff1097e886121a45f5d4b0baf4d9793d59e"><strong>compiler/coreSyn/CoreSyn.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">@@ -420,9 +420,9 @@ parts of the compilation pipeline.</td>

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420

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420

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<pre style="margin: 0;"> <span id="LC420" class="line" lang="haskell"></span>

</pre>

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421

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421

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<pre style="margin: 0;"> <span id="LC421" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [CoreSyn let/app invariant]</span></span>

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422

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422

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<pre style="margin: 0;"> <span id="LC422" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

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423

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<pre style="margin: 0;">-<span id="LC423" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The let/app invariant</span></span>

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424

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<pre style="margin: 0;">-<span id="LC424" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    <span class="idiff left right"> </span>the right hand side of a non-recursive 'Let', and</span></span>

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425

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<pre style="margin: 0;">-<span id="LC425" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    <span class="idiff left right"> </span>the argument of an 'App',</span></span>

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<pre style="margin: 0;">+<span id="LC423" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The let/app invariant<span class="idiff left right">:</span></span></span>

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<pre style="margin: 0;">+<span id="LC424" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    the right hand side of a non-recursive 'Let', and</span></span>

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<pre style="margin: 0;">+<span id="LC425" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    the argument of an 'App',</span></span>

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426

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426

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<pre style="margin: 0;"> <span id="LC426" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    /may/ be of unlifted type, but only if</span></span>

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427

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427

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<pre style="margin: 0;"> <span id="LC427" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    the expression is ok-for-speculation</span></span>

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<pre style="margin: 0;"> <span id="LC428" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    or the 'Let' is for a join point.</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="445" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -445,6 +445,14 @@ which will generate a @case@ if necessary</td>

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445

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445

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<pre style="margin: 0;"> <span id="LC445" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The let/app invariant is initially enforced by mkCoreLet and mkCoreApp in</span></span>

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446

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<pre style="margin: 0;"> <span id="LC446" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">coreSyn/MkCore.</span></span>

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<pre style="margin: 0;"> <span id="LC447" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC448" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">One notable exception to this rule is bottoming expressions. For instance, we</span></span>

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<pre style="margin: 0;">+<span id="LC449" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">allow</span></span>

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<pre style="margin: 0;">+<span id="LC450" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC451" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  y::Int = I# (runtimeError ...)</span></span>

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<pre style="margin: 0;">+<span id="LC452" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC453" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">since we sometimes need to make unlifted bindings bottom (e.g. see</span></span>

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<pre style="margin: 0;">+<span id="LC454" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">PrelRules.shiftRule).</span></span>

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<pre style="margin: 0;">+<span id="LC455" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC456" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [CoreSyn type and coercion invariant]</span></span>

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<pre style="margin: 0;"> <span id="LC457" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

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<pre style="margin: 0;"> <span id="LC458" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We allow a /non-recursive/, /non-top-level/ let to bind type and</span></span>

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<br>

</li>

<li id="844514241b3e1a009f66bf594cbb57fef61482fb">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/3c44d90954a64d83217f300e6508a21f13ccbb70...802035236788df8168345c84b10fb012ef1c21df#844514241b3e1a009f66bf594cbb57fef61482fb"><strong>compiler/prelude/PrelRules.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="134" 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="134" 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">@@ -134,11 +134,11 @@ primOpRules nm NotIOp      = mkPrimOpRule nm 1 [ unaryLit complementOp</td>

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<pre style="margin: 0;"> <span id="LC134" class="line" lang="haskell">                                               <span class="p">,</span> <span class="n" style="color: #333;">inversePrimOp</span> <span class="kt" style="color: #458; font-weight: 600;">NotIOp</span> <span class="p">]</span></span>

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<pre style="margin: 0;"> <span id="LC135" class="line" lang="haskell"><span class="n" style="color: #333;">primOpRules</span> <span class="n" style="color: #333;">nm</span> <span class="kt" style="color: #458; font-weight: 600;">IntNegOp</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPrimOpRule</span> <span class="n" style="color: #333;">nm</span> <span class="mi" style="color: #099;">1</span> <span class="p">[</span> <span class="n" style="color: #333;">unaryLit</span> <span class="n" style="color: #333;">negOp</span></span>

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<pre style="margin: 0;"> <span id="LC136" class="line" lang="haskell">                                               <span class="p">,</span> <span class="n" style="color: #333;">inversePrimOp</span> <span class="kt" style="color: #458; font-weight: 600;">IntNegOp</span> <span class="p">]</span></span>

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<pre style="margin: 0;">-<span id="LC137" class="line" lang="haskell"><span class="n" style="color: #333;">primOpRules</span> <span class="n" style="color: #333;">nm</span> <span class="kt" style="color: #458; font-weight: 600;">ISllOp</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPrimOpRule</span> <span class="n" style="color: #333;">nm</span> <span class="mi" style="color: #099;">2</span> <span class="p">[</span> <span class="n" style="color: #333;">shiftRule</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="kt" style="color: #458; font-weight: 600;">Bits</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">shiftL</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC137" class="line" lang="haskell"><span class="n" style="color: #333;">primOpRules</span> <span class="n" style="color: #333;">nm</span> <span class="kt" style="color: #458; font-weight: 600;">ISllOp</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPrimOpRule</span> <span class="n" style="color: #333;">nm</span> <span class="mi" style="color: #099;">2</span> <span class="p">[</span> <span class="n" style="color: #333;">shiftRule</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="kt" style="color: #458; font-weight: 600;">Bits</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">shiftL</span><span class="p">)</span><span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff right">intPrimTy</span></span></span>

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<pre style="margin: 0;"> <span id="LC138" class="line" lang="haskell">                                               <span class="p">,</span> <span class="n" style="color: #333;">rightIdentityDynFlags</span> <span class="n" style="color: #333;">zeroi</span> <span class="p">]</span></span>

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<pre style="margin: 0;">-<span id="LC139" class="line" lang="haskell"><span class="n" style="color: #333;">primOpRules</span> <span class="n" style="color: #333;">nm</span> <span class="kt" style="color: #458; font-weight: 600;">ISraOp</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPrimOpRule</span> <span class="n" style="color: #333;">nm</span> <span class="mi" style="color: #099;">2</span> <span class="p">[</span> <span class="n" style="color: #333;">shiftRule</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="kt" style="color: #458; font-weight: 600;">Bits</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">shiftR</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC139" class="line" lang="haskell"><span class="n" style="color: #333;">primOpRules</span> <span class="n" style="color: #333;">nm</span> <span class="kt" style="color: #458; font-weight: 600;">ISraOp</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPrimOpRule</span> <span class="n" style="color: #333;">nm</span> <span class="mi" style="color: #099;">2</span> <span class="p">[</span> <span class="n" style="color: #333;">shiftRule</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="kt" style="color: #458; font-weight: 600;">Bits</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">shiftR</span><span class="p">)</span><span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff right">intPrimTy</span></span></span>

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<pre style="margin: 0;"> <span id="LC140" class="line" lang="haskell">                                               <span class="p">,</span> <span class="n" style="color: #333;">rightIdentityDynFlags</span> <span class="n" style="color: #333;">zeroi</span> <span class="p">]</span></span>

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<pre style="margin: 0;">-<span id="LC141" class="line" lang="haskell"><span class="n" style="color: #333;">primOpRules</span> <span class="n" style="color: #333;">nm</span> <span class="kt" style="color: #458; font-weight: 600;">ISrlOp</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPrimOpRule</span> <span class="n" style="color: #333;">nm</span> <span class="mi" style="color: #099;">2</span> <span class="p">[</span> <span class="n" style="color: #333;">shiftRule</span> <span class="n" style="color: #333;">shiftRightLogical</span></span>

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<pre style="margin: 0;">+<span id="LC141" class="line" lang="haskell"><span class="n" style="color: #333;">primOpRules</span> <span class="n" style="color: #333;">nm</span> <span class="kt" style="color: #458; font-weight: 600;">ISrlOp</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPrimOpRule</span> <span class="n" style="color: #333;">nm</span> <span class="mi" style="color: #099;">2</span> <span class="p">[</span> <span class="n" style="color: #333;">shiftRule</span> <span class="n" style="color: #333;">shiftRightLogical</span><span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff right">intPrimTy</span></span></span>

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<pre style="margin: 0;"> <span id="LC142" class="line" lang="haskell">                                               <span class="p">,</span> <span class="n" style="color: #333;">rightIdentityDynFlags</span> <span class="n" style="color: #333;">zeroi</span> <span class="p">]</span></span>

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<pre style="margin: 0;"> <span id="LC143" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC144" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Word operations</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -180,8 +180,8 @@ primOpRules nm XorOp       = mkPrimOpRule nm 2 [ binaryLit (wordOp2 xor)</td>

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<pre style="margin: 0;"> <span id="LC180" class="line" lang="haskell">                                               <span class="p">,</span> <span class="n" style="color: #333;">equalArgs</span> <span class="o" style="font-weight: 600;">>></span> <span class="n" style="color: #333;">retLit</span> <span class="n" style="color: #333;">zerow</span> <span class="p">]</span></span>

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<pre style="margin: 0;"> <span id="LC181" class="line" lang="haskell"><span class="n" style="color: #333;">primOpRules</span> <span class="n" style="color: #333;">nm</span> <span class="kt" style="color: #458; font-weight: 600;">NotOp</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPrimOpRule</span> <span class="n" style="color: #333;">nm</span> <span class="mi" style="color: #099;">1</span> <span class="p">[</span> <span class="n" style="color: #333;">unaryLit</span> <span class="n" style="color: #333;">complementOp</span></span>

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<pre style="margin: 0;"> <span id="LC182" class="line" lang="haskell">                                               <span class="p">,</span> <span class="n" style="color: #333;">inversePrimOp</span> <span class="kt" style="color: #458; font-weight: 600;">NotOp</span> <span class="p">]</span></span>

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<pre style="margin: 0;">-<span id="LC183" class="line" lang="haskell"><span class="n" style="color: #333;">primOpRules</span> <span class="n" style="color: #333;">nm</span> <span class="kt" style="color: #458; font-weight: 600;">SllOp</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPrimOpRule</span> <span class="n" style="color: #333;">nm</span> <span class="mi" style="color: #099;">2</span> <span class="p">[</span> <span class="n" style="color: #333;">shiftRule</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="kt" style="color: #458; font-weight: 600;">Bits</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">shiftL</span><span class="p">)</span> <span class="p">]</span></span>

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<pre style="margin: 0;">-<span id="LC184" class="line" lang="haskell"><span class="n" style="color: #333;">primOpRules</span> <span class="n" style="color: #333;">nm</span> <span class="kt" style="color: #458; font-weight: 600;">SrlOp</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPrimOpRule</span> <span class="n" style="color: #333;">nm</span> <span class="mi" style="color: #099;">2</span> <span class="p">[</span> <span class="n" style="color: #333;">shiftRule</span> <span class="n" style="color: #333;">shiftRightLogical</span> <span class="p">]</span></span>

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<pre style="margin: 0;">+<span id="LC183" class="line" lang="haskell"><span class="n" style="color: #333;">primOpRules</span> <span class="n" style="color: #333;">nm</span> <span class="kt" style="color: #458; font-weight: 600;">SllOp</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPrimOpRule</span> <span class="n" style="color: #333;">nm</span> <span class="mi" style="color: #099;">2</span> <span class="p">[</span> <span class="n" style="color: #333;">shiftRule</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="kt" style="color: #458; font-weight: 600;">Bits</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">shiftL</span><span class="p">)</span> <span class="n" style="color: #333;"><span class="idiff left">wordPrimTy</span></span><span class="idiff right"> </span><span class="p">]</span></span>

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<pre style="margin: 0;">+<span id="LC184" class="line" lang="haskell"><span class="n" style="color: #333;">primOpRules</span> <span class="n" style="color: #333;">nm</span> <span class="kt" style="color: #458; font-weight: 600;">SrlOp</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPrimOpRule</span> <span class="n" style="color: #333;">nm</span> <span class="mi" style="color: #099;">2</span> <span class="p">[</span> <span class="n" style="color: #333;">shiftRule</span> <span class="n" style="color: #333;">shiftRightLogical</span> <span class="n" style="color: #333;"><span class="idiff left">wordPrimTy</span></span><span class="idiff right"> </span><span class="p">]</span></span>

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<pre style="margin: 0;"> <span id="LC185" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC186" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- coercions</span></span>

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<pre style="margin: 0;"> <span id="LC187" class="line" lang="haskell"><span class="n" style="color: #333;">primOpRules</span> <span class="n" style="color: #333;">nm</span> <span class="kt" style="color: #458; font-weight: 600;">Word2IntOp</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPrimOpRule</span> <span class="n" style="color: #333;">nm</span> <span class="mi" style="color: #099;">1</span> <span class="p">[</span> <span class="n" style="color: #333;">liftLitDynFlags</span> <span class="n" style="color: #333;">word2IntLit</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">@@ -462,12 +462,12 @@ wordOpC2 op dflags (LitNumber LitNumWord w1 _) (LitNumber LitNumWord w2 _) =</td>

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<pre style="margin: 0;"> <span id="LC462" class="line" lang="haskell">  <span class="n" style="color: #333;">wordCResult</span> <span class="n" style="color: #333;">dflags</span> <span class="p">(</span><span class="n" style="color: #333;">fromInteger</span> <span class="n" style="color: #333;">w1</span> <span class="p">`</span><span class="n" style="color: #333;">op</span><span class="p">`</span> <span class="n" style="color: #333;">fromInteger</span> <span class="n" style="color: #333;">w2</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC463" class="line" lang="haskell"><span class="n" style="color: #333;">wordOpC2</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span>  <span class="c1" style="color: #998; font-style: italic;">-- Could find LitLit</span></span>

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<pre style="margin: 0;"> <span id="LC464" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC465" class="line" lang="haskell"><span class="n" style="color: #333;">shiftRule</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Integer</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;">Integer</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RuleM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

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<pre style="margin: 0;">+<span id="LC465" class="line" lang="haskell"><span class="n" style="color: #333;">shiftRule</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Integer</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;">Integer</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Type</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="kt" style="color: #458; font-weight: 600;">RuleM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

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<pre style="margin: 0;"> <span id="LC466" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Shifts take an Int; hence third arg of op is Int</span></span>

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<pre style="margin: 0;"> <span id="LC467" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Used for shift primops</span></span>

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<pre style="margin: 0;"> <span id="LC468" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--    ISllOp, ISraOp, ISrlOp :: Word# -> Int# -> Word#</span></span>

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<pre style="margin: 0;"> <span id="LC469" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--    SllOp, SrlOp           :: Word# -> Int# -> Word#</span></span>

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<pre style="margin: 0;">-<span id="LC470" class="line" lang="haskell"><span class="n" style="color: #333;">shiftRule</span> <span class="n" style="color: #333;">shift_op</span></span>

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<pre style="margin: 0;">+<span id="LC470" class="line" lang="haskell"><span class="n" style="color: #333;">shiftRule</span> <span class="n" style="color: #333;">shift_op</span><span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff right">resultTy</span></span></span>

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<pre style="margin: 0;"> <span id="LC471" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getDynFlags</span></span>

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<pre style="margin: 0;"> <span id="LC472" class="line" lang="haskell">       <span class="p">;</span> <span class="p">[</span><span class="n" style="color: #333;">e1</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Lit</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LitNumber</span> <span class="kt" style="color: #458; font-weight: 600;">LitNumInt</span> <span class="n" style="color: #333;">shift_len</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;">getArgs</span></span>

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<pre style="margin: 0;"> <span id="LC473" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">e1</span> <span class="kr" style="font-weight: 600;">of</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="475" 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="475" 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">@@ -475,7 +475,7 @@ shiftRule shift_op</td>

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<pre style="margin: 0;"> <span id="LC475" class="line" lang="haskell">             <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">e1</span></span>

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<pre style="margin: 0;"> <span id="LC476" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- See Note [Guarding against silly shifts]</span></span>

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<pre style="margin: 0;"> <span id="LC477" class="line" lang="haskell">             <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">shift_len</span> <span class="o" style="font-weight: 600;"><</span> <span class="mi" style="color: #099;">0</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">shift_len</span> <span class="o" style="font-weight: 600;">></span> <span class="n" style="color: #333;">wordSizeInBits</span> <span class="n" style="color: #333;">dflags</span></span>

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<td class="diff-line-num new_line old" data-linenumber="478" 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="LC478" class="line" lang="haskell">             <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkRuntimeErrorApp</span> <span class="n" style="color: #333;">rUNTIME_ERROR_ID</span> <span class="n" style="color: #333;"><span class="idiff left right">wordPrim</span>Ty</span></span>

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<pre style="margin: 0;">+<span id="LC478" class="line" lang="haskell">             <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkRuntimeErrorApp</span> <span class="n" style="color: #333;">rUNTIME_ERROR_ID</span> <span class="n" style="color: #333;"><span class="idiff left right">result</span>Ty</span></span>

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<pre style="margin: 0;"> <span id="LC479" class="line" lang="haskell">                           <span class="p">(</span><span class="s" style="color: #d14;">"Bad shift length "</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">show</span> <span class="n" style="color: #333;">shift_len</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC480" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC481" class="line" lang="haskell">           <span class="c1" style="color: #998; font-style: italic;">-- Do the shift at type Integer, but shift length is Int</span></span>

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