You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
76 lines
3.8 KiB
HTML
76 lines
3.8 KiB
HTML
4 years ago
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>Loop Analysis and Representation - GNU Compiler Collection (GCC) Internals</title>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html">
|
||
|
|
<meta name="description" content="GNU Compiler Collection (GCC) Internals">
|
||
|
|
<meta name="generator" content="makeinfo 4.13">
|
||
|
|
<link title="Top" rel="start" href="index.html#Top">
|
||
|
|
<link rel="prev" href="Control-Flow.html#Control-Flow" title="Control Flow">
|
||
|
|
<link rel="next" href="Machine-Desc.html#Machine-Desc" title="Machine Desc">
|
||
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
||
|
|
<!--
|
||
|
|
Copyright (C) 1988-2015 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
Permission is granted to copy, distribute and/or modify this document
|
||
|
|
under the terms of the GNU Free Documentation License, Version 1.3 or
|
||
|
|
any later version published by the Free Software Foundation; with the
|
||
|
|
Invariant Sections being ``Funding Free Software'', the Front-Cover
|
||
|
|
Texts being (a) (see below), and with the Back-Cover Texts being (b)
|
||
|
|
(see below). A copy of the license is included in the section entitled
|
||
|
|
``GNU Free Documentation License''.
|
||
|
|
|
||
|
|
(a) The FSF's Front-Cover Text is:
|
||
|
|
|
||
|
|
A GNU Manual
|
||
|
|
|
||
|
|
(b) The FSF's Back-Cover Text is:
|
||
|
|
|
||
|
|
You have freedom to copy and modify this GNU Manual, like GNU
|
||
|
|
software. Copies published by the Free Software Foundation raise
|
||
|
|
funds for GNU development.-->
|
||
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
||
|
|
<style type="text/css"><!--
|
||
|
|
pre.display { font-family:inherit }
|
||
|
|
pre.format { font-family:inherit }
|
||
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
||
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
||
|
|
pre.smallexample { font-size:smaller }
|
||
|
|
pre.smalllisp { font-size:smaller }
|
||
|
|
span.sc { font-variant:small-caps }
|
||
|
|
span.roman { font-family:serif; font-weight:normal; }
|
||
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
||
|
|
--></style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div class="node">
|
||
|
|
<a name="Loop-Analysis-and-Representation"></a>
|
||
|
|
<p>
|
||
|
|
Next: <a rel="next" accesskey="n" href="Machine-Desc.html#Machine-Desc">Machine Desc</a>,
|
||
|
|
Previous: <a rel="previous" accesskey="p" href="Control-Flow.html#Control-Flow">Control Flow</a>,
|
||
|
|
Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a>
|
||
|
|
<hr>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<h2 class="chapter">15 Analysis and Representation of Loops</h2>
|
||
|
|
|
||
|
|
<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).
|
||
|
|
|
||
|
|
<ul class="menu">
|
||
|
|
<li><a accesskey="1" href="Loop-representation.html#Loop-representation">Loop representation</a>: Representation and analysis of loops.
|
||
|
|
<li><a accesskey="2" href="Loop-querying.html#Loop-querying">Loop querying</a>: Getting information about loops.
|
||
|
|
<li><a accesskey="3" href="Loop-manipulation.html#Loop-manipulation">Loop manipulation</a>: Loop manipulation functions.
|
||
|
|
<li><a accesskey="4" href="LCSSA.html#LCSSA">LCSSA</a>: Loop-closed SSA form.
|
||
|
|
<li><a accesskey="5" href="Scalar-evolutions.html#Scalar-evolutions">Scalar evolutions</a>: Induction variables on GIMPLE.
|
||
|
|
<li><a accesskey="6" href="loop_002div.html#loop_002div">loop-iv</a>: Induction variables on RTL.
|
||
|
|
<li><a accesskey="7" href="Number-of-iterations.html#Number-of-iterations">Number of iterations</a>: Number of iterations analysis.
|
||
|
|
<li><a accesskey="8" href="Dependency-analysis.html#Dependency-analysis">Dependency analysis</a>: Data dependency analysis.
|
||
|
|
<li><a accesskey="9" href="Omega.html#Omega">Omega</a>: A solver for linear programming problems.
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
</body></html>
|
||
|
|
|