diff options
Diffstat (limited to 'share/doc/gccint/Loop-Analysis-and-Representation.html')
| -rw-r--r-- | share/doc/gccint/Loop-Analysis-and-Representation.html | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/share/doc/gccint/Loop-Analysis-and-Representation.html b/share/doc/gccint/Loop-Analysis-and-Representation.html new file mode 100644 index 0000000..a61abe5 --- /dev/null +++ b/share/doc/gccint/Loop-Analysis-and-Representation.html @@ -0,0 +1,109 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1988-2023 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. --> +<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>GNU Compiler Collection (GCC) Internals: Loop Analysis and Representation</title> + +<meta name="description" content="GNU Compiler Collection (GCC) Internals: Loop Analysis and Representation"> +<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: Loop Analysis and Representation"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<link href="index.html#Top" rel="start" title="Top"> +<link href="Option-Index.html#Option-Index" rel="index" title="Option Index"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="index.html#Top" rel="up" title="Top"> +<link href="Loop-representation.html#Loop-representation" rel="next" title="Loop representation"> +<link href="Liveness-information.html#Liveness-information" rel="previous" title="Liveness information"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.smallquotation {font-size: smaller} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.indentedblock {margin-left: 3.2em} +div.lisp {margin-left: 3.2em} +div.smalldisplay {margin-left: 3.2em} +div.smallexample {margin-left: 3.2em} +div.smallindentedblock {margin-left: 3.2em; font-size: smaller} +div.smalllisp {margin-left: 3.2em} +kbd {font-style:oblique} +pre.display {font-family: inherit} +pre.format {font-family: inherit} +pre.menu-comment {font-family: serif} +pre.menu-preformatted {font-family: serif} +pre.smalldisplay {font-family: inherit; font-size: smaller} +pre.smallexample {font-size: smaller} +pre.smallformat {font-family: inherit; font-size: smaller} +pre.smalllisp {font-size: smaller} +span.nocodebreak {white-space:nowrap} +span.nolinebreak {white-space:nowrap} +span.roman {font-family:serif; font-weight:normal} +span.sansserif {font-family:sans-serif; font-weight:normal} +ul.no-bullet {list-style: none} +--> +</style> + + +</head> + +<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="Loop-Analysis-and-Representation"></a> +<div class="header"> +<p> +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="previous">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> +</div> +<hr> +<a name="Analysis-and-Representation-of-Loops"></a> +<h2 class="chapter">16 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). +</p> +<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. +</td></tr> +<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. +</td></tr> +<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. +</td></tr> +<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. +</td></tr> +<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. +</td></tr> +<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. +</td></tr> +<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. +</td></tr> +<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. +</td></tr> +</table> + + + + +</body> +</html> |