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134 lines
4.7 KiB
HTML
134 lines
4.7 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2018 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Funding Free Software", the Front-Cover
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Texts being (a) (see below), and with the Back-Cover Texts being (b)
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development. -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Macros and Functions (GNU Compiler Collection (GCC) Internals)</title>
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<meta name="description" content="Macros and Functions (GNU Compiler Collection (GCC) Internals)">
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<meta name="keywords" content="Macros and Functions (GNU Compiler Collection (GCC) Internals)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Tree-overview.html#Tree-overview" rel="up" title="Tree overview">
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<link href="Identifiers.html#Identifiers" rel="next" title="Identifiers">
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<link href="Tree-overview.html#Tree-overview" rel="prev" title="Tree overview">
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<style type="text/css">
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-->
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</style>
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</head>
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<body lang="en">
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<a name="Macros-and-Functions"></a>
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<div class="header">
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<p>
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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>
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</div>
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<hr>
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<a name="Trees"></a>
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<h4 class="subsection">11.2.1 Trees</h4>
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<a name="index-tree-1"></a>
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<a name="index-TREE_005fCHAIN"></a>
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<a name="index-TREE_005fTYPE"></a>
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<p>All GENERIC trees have two fields in common. First, <code>TREE_CHAIN</code>
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is a pointer that can be used as a singly-linked list to other trees.
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The other is <code>TREE_TYPE</code>. Many trees store the type of an
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expression or declaration in this field.
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</p>
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<p>These are some other functions for handling trees:
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</p>
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<dl compact="compact">
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<dt><code>tree_size</code>
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<a name="index-tree_005fsize"></a>
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</dt>
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<dd><p>Return the number of bytes a tree takes.
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</p>
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</dd>
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<dt><code>build0</code>
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<a name="index-build0"></a>
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</dt>
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<dt><code>build1</code>
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<a name="index-build1"></a>
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</dt>
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<dt><code>build2</code>
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<a name="index-build2"></a>
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</dt>
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<dt><code>build3</code>
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<a name="index-build3"></a>
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</dt>
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<dt><code>build4</code>
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<a name="index-build4"></a>
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</dt>
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<dt><code>build5</code>
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<a name="index-build5"></a>
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</dt>
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<dt><code>build6</code>
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<a name="index-build6"></a>
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</dt>
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<dd>
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<p>These functions build a tree and supply values to put in each
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parameter. The basic signature is ‘<samp>code, type, [operands]<!-- /@w --></samp>’.
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<code>code</code> is the <code>TREE_CODE</code>, and <code>type</code> is a tree
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representing the <code>TREE_TYPE</code>. These are followed by the
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operands, each of which is also a tree.
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</p>
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</dd>
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</dl>
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</body>
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</html>
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