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.
134 lines
4.7 KiB
HTML
134 lines
4.7 KiB
HTML
4 years ago
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
|
|
<html>
|
||
|
|
<!-- Copyright (C) 1988-2018 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 6.4, http://www.gnu.org/software/texinfo/ -->
|
||
|
|
<head>
|
||
|
|
<title>Macros and Functions (GNU Compiler Collection (GCC) Internals)</title>
|
||
|
|
|
||
|
|
<meta name="description" content="Macros and Functions (GNU Compiler Collection (GCC) Internals)">
|
||
|
|
<meta name="keywords" content="Macros and Functions (GNU Compiler Collection (GCC) Internals)">
|
||
|
|
<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="Tree-overview.html#Tree-overview" rel="up" title="Tree overview">
|
||
|
|
<link href="Identifiers.html#Identifiers" rel="next" title="Identifiers">
|
||
|
|
<link href="Tree-overview.html#Tree-overview" rel="prev" title="Tree overview">
|
||
|
|
<style type="text/css">
|
||
|
|
<!--
|
||
|
|
a.summary-letter {text-decoration: none}
|
||
|
|
blockquote.indentedblock {margin-right: 0em}
|
||
|
|
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
|
||
|
|
blockquote.smallquotation {font-size: smaller}
|
||
|
|
div.display {margin-left: 3.2em}
|
||
|
|
div.example {margin-left: 3.2em}
|
||
|
|
div.lisp {margin-left: 3.2em}
|
||
|
|
div.smalldisplay {margin-left: 3.2em}
|
||
|
|
div.smallexample {margin-left: 3.2em}
|
||
|
|
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.nolinebreak {white-space: nowrap}
|
||
|
|
span.roman {font-family: initial; font-weight: normal}
|
||
|
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
||
|
|
ul.no-bullet {list-style: none}
|
||
|
|
-->
|
||
|
|
</style>
|
||
|
|
|
||
|
|
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body lang="en">
|
||
|
|
<a name="Macros-and-Functions"></a>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="Identifiers.html#Identifiers" accesskey="n" rel="next">Identifiers</a>, Up: <a href="Tree-overview.html#Tree-overview" accesskey="u" rel="up">Tree overview</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="Trees"></a>
|
||
|
|
<h4 class="subsection">11.2.1 Trees</h4>
|
||
|
|
<a name="index-tree-1"></a>
|
||
|
|
<a name="index-TREE_005fCHAIN"></a>
|
||
|
|
<a name="index-TREE_005fTYPE"></a>
|
||
|
|
|
||
|
|
<p>All GENERIC trees have two fields in common. First, <code>TREE_CHAIN</code>
|
||
|
|
is a pointer that can be used as a singly-linked list to other trees.
|
||
|
|
The other is <code>TREE_TYPE</code>. Many trees store the type of an
|
||
|
|
expression or declaration in this field.
|
||
|
|
</p>
|
||
|
|
<p>These are some other functions for handling trees:
|
||
|
|
</p>
|
||
|
|
<dl compact="compact">
|
||
|
|
<dt><code>tree_size</code>
|
||
|
|
<a name="index-tree_005fsize"></a>
|
||
|
|
</dt>
|
||
|
|
<dd><p>Return the number of bytes a tree takes.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>build0</code>
|
||
|
|
<a name="index-build0"></a>
|
||
|
|
</dt>
|
||
|
|
<dt><code>build1</code>
|
||
|
|
<a name="index-build1"></a>
|
||
|
|
</dt>
|
||
|
|
<dt><code>build2</code>
|
||
|
|
<a name="index-build2"></a>
|
||
|
|
</dt>
|
||
|
|
<dt><code>build3</code>
|
||
|
|
<a name="index-build3"></a>
|
||
|
|
</dt>
|
||
|
|
<dt><code>build4</code>
|
||
|
|
<a name="index-build4"></a>
|
||
|
|
</dt>
|
||
|
|
<dt><code>build5</code>
|
||
|
|
<a name="index-build5"></a>
|
||
|
|
</dt>
|
||
|
|
<dt><code>build6</code>
|
||
|
|
<a name="index-build6"></a>
|
||
|
|
</dt>
|
||
|
|
<dd>
|
||
|
|
<p>These functions build a tree and supply values to put in each
|
||
|
|
parameter. The basic signature is ‘<samp>code, type, [operands]<!-- /@w --></samp>’.
|
||
|
|
<code>code</code> is the <code>TREE_CODE</code>, and <code>type</code> is a tree
|
||
|
|
representing the <code>TREE_TYPE</code>. These are followed by the
|
||
|
|
operands, each of which is also a tree.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|