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  73. Next: <a href="Static-Analyzer.html#Static-Analyzer" accesskey="n" rel="next">Static Analyzer</a>, Previous: <a href="LTO.html#LTO" accesskey="p" rel="prev">LTO</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>

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  76. <a name="Match-and-Simplify-1"></a>

  77. <h2 class="chapter">26 Match and Simplify</h2>

  78. <a name="index-Match-and-Simplify"></a>

  79. 

  80. <p>The GIMPLE and GENERIC pattern matching project match-and-simplify

  81. tries to address several issues.

  82. </p>

  83. <ol>

  84. <li> unify expression simplifications currently spread and duplicated

  85.     over separate files like fold-const.c, gimple-fold.c and builtins.c

  86. </li><li> allow for a cheap way to implement building and simplifying

  87.     non-trivial GIMPLE expressions, avoiding the need to go through

  88.     building and simplifying GENERIC via fold_buildN and then

  89.     gimplifying via force_gimple_operand

  90. </li></ol>

  91. 

  92. <p>To address these the project introduces a simple domain specific language

  93. to write expression simplifications from which code targeting GIMPLE

  94. and GENERIC is auto-generated.  The GENERIC variant follows the

  95. fold_buildN API while for the GIMPLE variant and to address 2) new

  96. APIs are introduced.

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