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<h3>
Ben Gamari pushed to branch wip/runRW
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c1f35320a1ee3885ff8291cac9dfeefb6b32fb06">c1f35320</a></strong>
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<span>by Ben Gamari</span>
<i>at 2020-04-21T15:59:13+00:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Don't look through casts in CoreLint
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<h4>1 changed file:</h4>
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<a href="#36a42448a83a9d1f6df8475f03ead2eed199dd8e">
compiler/GHC/Core/Lint.hs
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<h4>Changes:</h4>
<li id="36a42448a83a9d1f6df8475f03ead2eed199dd8e">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c1f35320a1ee3885ff8291cac9dfeefb6b32fb06#36a42448a83a9d1f6df8475f03ead2eed199dd8e"><strong>compiler/GHC/Core/Lint.hs</strong></a>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="710" 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="710" 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">@@ -710,9 +710,6 @@ lintJoinLams join_arity enforce rhs</td>
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710
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710
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<pre style="margin: 0;"> <span id="LC710" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC711" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lintCoreExpr</span> <span class="n" style="color: #333;">rhs</span></span>
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712
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<pre style="margin: 0;"> <span id="LC712" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">n</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lintLambda</span> <span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">go</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="n" style="color: #333;">expr</span></span>
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713
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<pre style="margin: 0;">-<span id="LC713" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">n</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">expr</span></span>
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<pre style="margin: 0;">-<span id="LC714" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">lintCastExpr</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">co</span></span>
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<pre style="margin: 0;">-<span id="LC715" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC713" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- N.B. join points can be cast. e.g. we consider ((\x -> ...) `cast` ...)</span></span>
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<pre style="margin: 0;"> <span id="LC714" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- to be a join point at join arity 1.</span></span>
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<pre style="margin: 0;"> <span id="LC715" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">_other</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">bndr</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">enforce</span> <span class="c1" style="color: #998; font-style: italic;">-- Join point with too few RHS lambdas</span></span>
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