doc/guide/localhost/LoopInvariant

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  26 <h1>LoopInvariant</h1>
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  29 <div id="preamble">
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  31 <div class="paragraph"><p><a href="LoopInvariant">LoopInvariant</a> is an optimization pass for the <a href="SSA">SSA</a>
  32 <a href="IntermediateLanguage">IntermediateLanguage</a>, invoked from <a href="SSASimplify">SSASimplify</a>.</p></div>
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  35 <div class="sect1">
  36 <h2 id="_description">Description</h2>
  37 <div class="sectionbody">
  38 <div class="paragraph"><p>This pass removes loop invariant arguments to local loops.</p></div>
  39 <div class="listingblock">
  40 <div class="content monospaced">
  41 <pre>  loop (x, y)
  42     ...
  43   ...
  44     loop (x, z)
  45   ...</pre>
  46 </div></div>
  47 <div class="paragraph"><p>becomes</p></div>
  48 <div class="listingblock">
  49 <div class="content monospaced">
  50 <pre>  loop' (x, y)
  51     loop (y)
  52   loop (y)
  53     ...
  54   ...
  55     loop (z)
  56   ...</pre>
  57 </div></div>
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  60 <div class="sect1">
  61 <h2 id="_implementation">Implementation</h2>
  62 <div class="sectionbody">
  63 <div class="ulist"><ul>
  64 <li>
  65 <p>
  66 <a href="https://github.com/MLton/mlton/blob/master/mlton/ssa/loop-invariant.fun"><span class="monospaced">loop-invariant.fun</span></a>
  67 </p>
  68 </li>
  69 </ul></div>
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  72 <div class="sect1">
  73 <h2 id="_details_and_notes">Details and Notes</h2>
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  75 <div class="paragraph"><p></p></div>
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