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| Next: <a href="Machine-Desc.html#Machine-Desc" accesskey="n" rel="next">Machine Desc</a>, Previous: <a href="Control-Flow.html#Control-Flow" accesskey="p" rel="prev">Control Flow</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<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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| <h2 class="chapter">15 Analysis and Representation of Loops</h2> |
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| <p>GCC provides extensive infrastructure for work with natural loops, i.e., |
| strongly connected components of CFG with only one entry block. This |
| chapter describes representation of loops in GCC, both on GIMPLE and in |
| RTL, as well as the interfaces to loop-related analyses (induction |
| variable analysis and number of iterations analysis). |
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| <table class="menu" border="0" cellspacing="0"> |
| <tr><td align="left" valign="top">• <a href="Loop-representation.html#Loop-representation" accesskey="1">Loop representation</a>:</td><td> </td><td align="left" valign="top">Representation and analysis of loops. |
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| <tr><td align="left" valign="top">• <a href="Loop-querying.html#Loop-querying" accesskey="2">Loop querying</a>:</td><td> </td><td align="left" valign="top">Getting information about loops. |
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| <tr><td align="left" valign="top">• <a href="Loop-manipulation.html#Loop-manipulation" accesskey="3">Loop manipulation</a>:</td><td> </td><td align="left" valign="top">Loop manipulation functions. |
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| <tr><td align="left" valign="top">• <a href="LCSSA.html#LCSSA" accesskey="4">LCSSA</a>:</td><td> </td><td align="left" valign="top">Loop-closed SSA form. |
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| <tr><td align="left" valign="top">• <a href="Scalar-evolutions.html#Scalar-evolutions" accesskey="5">Scalar evolutions</a>:</td><td> </td><td align="left" valign="top">Induction variables on GIMPLE. |
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| <tr><td align="left" valign="top">• <a href="loop_002div.html#loop_002div" accesskey="6">loop-iv</a>:</td><td> </td><td align="left" valign="top">Induction variables on RTL. |
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| <tr><td align="left" valign="top">• <a href="Number-of-iterations.html#Number-of-iterations" accesskey="7">Number of iterations</a>:</td><td> </td><td align="left" valign="top">Number of iterations analysis. |
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| <tr><td align="left" valign="top">• <a href="Dependency-analysis.html#Dependency-analysis" accesskey="8">Dependency analysis</a>:</td><td> </td><td align="left" valign="top">Data dependency analysis. |
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| <tr><td align="left" valign="top">• <a href="Omega.html#Omega" accesskey="9">Omega</a>:</td><td> </td><td align="left" valign="top">A solver for linear programming problems. |
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