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llvm-6502/docs/Lexicon.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>The LLVM Lexicon</title>
<link rel="stylesheet" href="llvm.css" type="text/css">
<meta name="author" content="Various">
<meta name="description"
content="A glossary of terms used with the LLVM project.">
</head>
<body>
<div class="doc_title">The LLVM Lexicon</div>
<p class="doc_warning">NOTE: This document is a work in progress!</p>
<!-- *********************************************************************** -->
<div class="doc_section">Table Of Contents</div>
<!-- *********************************************************************** -->
<div class="doc_text">
<table>
<tr><th colspan="8"><b>- <a href="#A">A</a> -</b></th></tr>
<tr>
<td><a href="#ADCE">ADCE</a></td>
<td></td>
<td></td>
</tr>
<tr><th colspan="8"><b>- <a href="#B">B</a> -</b></th></tr>
<tr>
<td><a href="#BURS">BURS</a></td>
<td></td>
<td></td>
</tr>
<tr><th colspan="8"><b>- <a href="#C">C</a> -</b></th></tr>
<tr>
<td><a href="#CSE">CSE</a></td>
<td></td>
<td></td>
</tr>
<tr><th colspan="8"><b>- <a href="#D">D</a> -</b></th></tr>
<tr>
<td><a href="#DSA">DSA</a></td>
<td><a href="#DSE">DSE</a></td>
<td></td>
<td></td>
</tr>
<tr><th colspan="8"><b>- <a href="#I">I</a> -</b></th></tr>
<tr>
<td><a href="#IPA">IPA</a></td>
<td><a href="#IPO">IPO</a></td>
<td></td>
<td></td>
</tr>
<tr><th colspan="8"><b>- <a href="#L">L</a> -</b></th></tr>
<tr>
<td><a href="#LICM">LICM</a></td>
<td><a href="#Load-VN">Load-VN</a></td>
<td></td>
<td></td>
</tr>
<tr><th colspan="8"><b>- <a href="#P">P</a> -</b></th></tr>
<tr>
<td><a href="#PRE">PRE</a></td>
<td></td>
<td></td>
</tr>
<tr><th colspan="8"><b>- <a href="#S">S</a> -</b></th></tr>
<tr>
<td><a href="#SCCP">SCCP</a></td>
<td><a href="#SSA">SSA</a></td>
<td></td>
</tr>
</table>
</div>
<!-- *********************************************************************** -->
<div class="doc_section">Definitions</div>
<!-- *********************************************************************** -->
<!-- _______________________________________________________________________ -->
<div class="doc_subsection"><a name="A">- A -</a></div>
<div class="doc_text">
<dl>
<dt><a name="ADCE"><b>ADCE</b></a></dt>
<dd>Aggressive Dead Code Elimination</dd>
</dl>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsection"><a name="B">- B -</a></div>
<div class="doc_text">
<dl>
<dt><a name="BURS"><b>BURS</b></a></dt>
<dd>Bottom Up Rewriting System - A method of instruction selection for
code generation. An example is the <a
href="http://www.program-transformation.org/Transform/BURG">BURG</a> tool.</dd>
</dl>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsection"><a name="C">- C -</a></div>
<div class="doc_text">
<dl>
<dt><a name="CSE"><b>CSE</b></a></dt>
<dd>Common Subexpression Elimination. An optimization that removes common
subexpression compuation. For example <tt>(a+b)*(a+b)</tt> has two
subexpressions that are the same: <tt>(a+b)</tt>. This optimization would
perform the addition only once and then perform the multiply (but only if
its compulationally correct/safe).
</dl>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsection"><a name="D">- D -</a></div>
<div class="doc_text">
<dl>
<dt><a name="DSA"><b>DSA</b></a></dt>
<dd>Data Structure Analysis</dd>
<dt><a name="DSE"><b>DSE</b></a></dt>
<dd>Dead Store Elimination</dd>
</dl>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsection"><a name="I">- I -</a></div>
<div class="doc_text">
<dl>
<dt><a name="IPA"><b>IPA</b></a></dt>
<dd>Inter-Procedural Analysis. Refers to any variety of code analysis that
occurs between procedures, functions or compilation units (modules).</dd>
<dt><a name="IPO"><b>IPO</b></a></dt>
<dd>Inter-Procedural Optimization. Refers to any variety of code
optimization that occurs between procedures, functions or compilation units
(modules).</dd>
</dl>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsection"><a name="L">- L -</a></div>
<div class="doc_text">
<dl>
<dt><a name="LICM"><b>LICM</b></a></dt>
<dd>Loop Invariant Code Motion</dd>
<dt><a name="Load-VN"><b>Load-VN</b></a></dt>
<dd>Load Value Numbering</dd>
</dl>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsection"><a name="P">- P -</a></div>
<div class="doc_text">
<dl>
<dt><a name="PRE"><b>PRE</b></a></dt>
<dd>Partial Redundancy Elimination</dd>
</dl>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsection"><a name="S">- S -</a></div>
<div class="doc_text">
<dl>
<dt><a name="SCCP"><b>SCCP</b></a></dt>
<dd>Sparse Conditional Constant Propagation
<dt><a name="SSA"><b>SSA</b></a></dt>
<dd>Static Single Assignment</dd>
</dl>
</div>
<!-- *********************************************************************** -->
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