docs/Lexicon.html

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   5   <title>The LLVM Lexicon</title>
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   7   <meta name="author" content="Various">
   8   <meta name="description"
   9   content="A glossary of terms used with the LLVM project.">
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  12 <div class="doc_title">The LLVM Lexicon</div>
  13 <p class="doc_warning">NOTE: This document is a work in progress!</p>
  14 <!-- *********************************************************************** -->
  15 <div class="doc_section">Table Of Contents</div>
  16 <!-- *********************************************************************** -->
  17 <div class="doc_text">
  18   <table>
  19     <tr><th colspan="8"><b>- <a href="#A">A</a> -</b></th></tr>
  20     <tr>
  21       <td><a href="#ADCE">ADCE</a></td>
  22       <td></td>
  23       <td></td>
  24     </tr>
  25     <tr><th colspan="8"><b>- <a href="#B">B</a> -</b></th></tr>
  26     <tr>
  27       <td><a href="#BURS">BURS</a></td>
  28       <td></td>
  29       <td></td>
  30     </tr>
  31     <tr><th colspan="8"><b>- <a href="#C">C</a> -</b></th></tr>
  32     <tr>
  33       <td><a href="#CSE">CSE</a></td>
  34       <td></td>
  35       <td></td>
  36     </tr>
  37     <tr><th colspan="8"><b>- <a href="#D">D</a> -</b></th></tr>
  38     <tr>
  39       <td><a href="#DSA">DSA</a></td>
  40       <td><a href="#DSE">DSE</a></td>
  41       <td></td>
  42       <td></td>
  43     </tr>
  44     <tr><th colspan="8"><b>- <a href="#I">I</a> -</b></th></tr>
  45     <tr>
  46       <td><a href="#IPA">IPA</a></td>
  47       <td><a href="#IPO">IPO</a></td>
  48       <td></td>
  49       <td></td>
  50     </tr>
  51     <tr><th colspan="8"><b>- <a href="#L">L</a> -</b></th></tr>
  52     <tr>
  53       <td><a href="#LICM">LICM</a></td>
  54       <td><a href="#Load-VN">Load-VN</a></td>
  55       <td></td>
  56       <td></td>
  57     </tr>
  58     <tr><th colspan="8"><b>- <a href="#P">P</a> -</b></th></tr>
  59     <tr>
  60       <td><a href="#PRE">PRE</a></td>
  61       <td></td>
  62       <td></td>
  63     </tr>
  64     <tr><th colspan="8"><b>- <a href="#S">S</a> -</b></th></tr>
  65     <tr>
  66       <td><a href="#SCCP">SCCP</a></td>
  67       <td><a href="#SSA">SSA</a></td>
  68       <td></td>
  69     </tr>
  70   </table>
  71 </div>
  72
  73 <!-- *********************************************************************** -->
  74 <div class="doc_section">Definitions</div>
  75 <!-- *********************************************************************** -->
  76 <!-- _______________________________________________________________________ -->
  77 <div class="doc_subsection"><a name="A">- A -</a></div>
  78 <div class="doc_text">
  79   <dl>
  80     <dt><a name="ADCE"><b>ADCE</b></a></dt>
  81     <dd>Aggressive Dead Code Elimination</dd>
  82   </dl>
  83 </div>
  84 <!-- _______________________________________________________________________ -->
  85 <div class="doc_subsection"><a name="B">- B -</a></div>
  86 <div class="doc_text">
  87   <dl>
  88     <dt><a name="BURS"><b>BURS</b></a></dt>
  89     <dd>Bottom Up Rewriting System - A method of instruction selection for
  90         code generation.  An example is the <a
  91 href="http://www.program-transformation.org/Transform/BURG">BURG</a> tool.</dd>
  92   </dl>
  93 </div>
  94 <!-- _______________________________________________________________________ -->
  95 <div class="doc_subsection"><a name="C">- C -</a></div>
  96 <div class="doc_text">
  97   <dl>
  98     <dt><a name="CSE"><b>CSE</b></a></dt>
  99     <dd>Common Subexpression Elimination. An optimization that removes common
 100     subexpression compuation. For example <tt>(a+b)*(a+b)</tt> has two
 101     subexpressions that are the same: <tt>(a+b)</tt>. This optimization would
 102     perform the addition only once and then perform the multiply (but only if
 103     its compulationally correct/safe).
 104   </dl>
 105 </div>
 106 <!-- _______________________________________________________________________ -->
 107 <div class="doc_subsection"><a name="D">- D -</a></div>
 108 <div class="doc_text">
 109   <dl>
 110     <dt><a name="DSA"><b>DSA</b></a></dt>
 111     <dd>Data Structure Analysis</dd>
 112     <dt><a name="DSE"><b>DSE</b></a></dt>
 113     <dd>Dead Store Elimination</dd>
 114   </dl>
 115 </div>
 116 <!-- _______________________________________________________________________ -->
 117 <div class="doc_subsection"><a name="I">- I -</a></div>
 118 <div class="doc_text">
 119   <dl>
 120     <dt><a name="IPA"><b>IPA</b></a></dt>
 121     <dd>Inter-Procedural Analysis. Refers to any variety of code analysis that
 122     occurs between procedures, functions or compilation units (modules).</dd>
 123     <dt><a name="IPO"><b>IPO</b></a></dt>
 124     <dd>Inter-Procedural Optimization. Refers to any variety of code
 125     optimization that occurs between procedures, functions or compilation units
 126     (modules).</dd>
 127   </dl>
 128 </div>
 129 <!-- _______________________________________________________________________ -->
 130 <div class="doc_subsection"><a name="L">- L -</a></div>
 131 <div class="doc_text">
 132   <dl>
 133     <dt><a name="LICM"><b>LICM</b></a></dt>
 134     <dd>Loop Invariant Code Motion</dd>
 135     <dt><a name="Load-VN"><b>Load-VN</b></a></dt>
 136     <dd>Load Value Numbering</dd>
 137   </dl>
 138 </div>
 139 <!-- _______________________________________________________________________ -->
 140 <div class="doc_subsection"><a name="P">- P -</a></div>
 141 <div class="doc_text">
 142   <dl>
 143     <dt><a name="PRE"><b>PRE</b></a></dt>
 144     <dd>Partial Redundancy Elimination</dd>
 145   </dl>
 146 </div>
 147 <!-- _______________________________________________________________________ -->
 148 <div class="doc_subsection"><a name="S">- S -</a></div>
 149 <div class="doc_text">
 150   <dl>
 151     <dt><a name="SCCP"><b>SCCP</b></a></dt>
 152     <dd>Sparse Conditional Constant Propagation
 153     <dt><a name="SSA"><b>SSA</b></a></dt>
 154     <dd>Static Single Assignment</dd>
 155   </dl>
 156 </div>
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