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<title>Passes (GNU Compiler Collection (GCC) Internals)</title>

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<a name="Passes-and-Files-of-the-Compiler"></a>
<h2 class="chapter">9 Passes and Files of the Compiler</h2>
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<a name="index-files-and-passes-of-the-compiler"></a>
<a name="index-compiler-passes-and-files"></a>
<a name="index-pass-dumps"></a>

<p>This chapter is dedicated to giving an overview of the optimization and
code generation passes of the compiler.  In the process, it describes
some of the language front end interface, though this description is no
where near complete.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">&bull; <a href="Parsing-pass.html#Parsing-pass" accesskey="1">Parsing pass</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">The language front end turns text into bits.
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Gimplification-pass.html#Gimplification-pass" accesskey="2">Gimplification pass</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">The bits are turned into something we can optimize.
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<tr><td align="left" valign="top">&bull; <a href="Pass-manager.html#Pass-manager" accesskey="3">Pass manager</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Sequencing the optimization passes.
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="IPA-passes.html#IPA-passes" accesskey="4">IPA passes</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Inter-procedural optimizations.
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<tr><td align="left" valign="top">&bull; <a href="Tree-SSA-passes.html#Tree-SSA-passes" accesskey="5">Tree SSA passes</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Optimizations on a high-level representation.
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<tr><td align="left" valign="top">&bull; <a href="RTL-passes.html#RTL-passes" accesskey="6">RTL passes</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Optimizations on a low-level representation.
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<tr><td align="left" valign="top">&bull; <a href="Optimization-info.html#Optimization-info" accesskey="7">Optimization info</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Dumping optimization information from passes.
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