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Began eliminate redundant labels stage
2019-06-11 02:38:15 +03:00
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<title>2/erm</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="inweb.css" rel="stylesheet" rev="stylesheet" type="text/css">
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<!--Weave of '2/erl' generated by 7-->
<ul class="crumbs"><li><a href="../webs.html">&#9733;</a></li><li><a href="index.html">codegen</a></li><li><a href="index.html#2">Chapter 2: Linking</a></li><li><b>Eliminate Redundant Labels</b></li></ul><p class="purpose">To reconcile clashes between assimilated and originally generated verbs.</p>
<ul class="toc"><li><a href="#SP1">&#167;1. Pipeline stage</a></li><li><a href="#SP2">&#167;2. Running</a></li></ul><hr class="tocbar">
<p class="inwebparagraph"><a id="SP1"></a><b>&#167;1. Pipeline stage. </b></p>
<pre class="display">
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">CodeGen::Labels::create_pipeline_stage</span><span class="plain">(</span><span class="reserved">void</span><span class="plain">) {</span>
<span class="functiontext">CodeGen::Stage::new</span><span class="plain">(</span><span class="identifier">I</span><span class="string">"eliminate-redundant-labels"</span><span class="plain">, </span><span class="functiontext">CodeGen::Labels::run_pipeline_stage</span><span class="plain">, </span><span class="constant">NO_STAGE_ARG</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="reserved">int</span><span class="plain"> </span><span class="functiontext">CodeGen::Labels::run_pipeline_stage</span><span class="plain">(</span><span class="reserved">pipeline_step</span><span class="plain"> *</span><span class="identifier">step</span><span class="plain">) {</span>
<span class="functiontext">CodeGen::Labels::go</span><span class="plain">(</span><span class="identifier">step</span><span class="plain">-</span><span class="element">&gt;repository</span><span class="plain">);</span>
<span class="reserved">return</span><span class="plain"> </span><span class="identifier">TRUE</span><span class="plain">;</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function CodeGen::Labels::create_pipeline_stage is used in 1/stg (<a href="1-stg.html#SP3">&#167;3</a>).</p>
<p class="endnote">The function CodeGen::Labels::run_pipeline_stage appears nowhere else.</p>
<p class="inwebparagraph"><a id="SP2"></a><b>&#167;2. Running. </b></p>
<pre class="display">
<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">CodeGen::Labels::go</span><span class="plain">(</span><span class="identifier">inter_repository</span><span class="plain"> *</span><span class="identifier">I</span><span class="plain">) {</span>
<span class="identifier">inter_frame</span><span class="plain"> </span><span class="identifier">P</span><span class="plain">;</span>
<span class="identifier">LOOP_THROUGH_FRAMES</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">I</span><span class="plain">) {</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">P</span><span class="plain">.</span><span class="identifier">data</span><span class="plain">[</span><span class="identifier">ID_IFLD</span><span class="plain">] == </span><span class="identifier">PACKAGE_IST</span><span class="plain">) {</span>
<span class="identifier">inter_symbol</span><span class="plain"> *</span><span class="identifier">package_name</span><span class="plain"> = </span><span class="identifier">Inter::SymbolsTables::symbol_from_frame_data</span><span class="plain">(</span><span class="identifier">P</span><span class="plain">, </span><span class="identifier">DEFN_PACKAGE_IFLD</span><span class="plain">);</span>
<span class="identifier">inter_package</span><span class="plain"> *</span><span class="identifier">which</span><span class="plain"> = </span><span class="identifier">Inter::Package::which</span><span class="plain">(</span><span class="identifier">package_name</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">which</span><span class="plain">) {</span>
<span class="identifier">inter_symbol</span><span class="plain"> *</span><span class="identifier">ptype</span><span class="plain"> = </span><span class="identifier">Inter::Packages::type</span><span class="plain">(</span><span class="identifier">which</span><span class="plain">);</span>
<span class="reserved">if</span><span class="plain"> ((</span><span class="identifier">ptype</span><span class="plain">) &amp;&amp; (</span><span class="identifier">Str::eq</span><span class="plain">(</span><span class="identifier">ptype</span><span class="plain">-&gt;</span><span class="identifier">symbol_name</span><span class="plain">, </span><span class="identifier">I</span><span class="string">"_code"</span><span class="plain">))) {</span>
<span class="identifier">LOG</span><span class="plain">(</span><span class="string">"Code block $3\</span><span class="plain">n</span><span class="string">"</span><span class="plain">, </span><span class="identifier">package_name</span><span class="plain">);</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="plain">}</span>
<span class="plain">}</span>
</pre>
<p class="inwebparagraph"></p>
<p class="endnote">The function CodeGen::Labels::go is used in <a href="#SP1">&#167;1</a>.</p>
<hr class="tocbar">
<ul class="toc"><li><a href="2-erm.html">Back to 'Eliminate Redundant Matter'</a></li><li><a href="2-inv.html">Continue with 'Inventory'</a></li></ul><hr class="tocbar">
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