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
5.1 KiB
HTML
134 lines
5.1 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>Plugins pass (GNU Compiler Collection (GCC) Internals)</title>
|
||
|
|
|
||
|
|
<meta name="description" content="Plugins pass (GNU Compiler Collection (GCC) Internals)">
|
||
|
|
<meta name="keywords" content="Plugins pass (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="Plugins.html#Plugins" rel="up" title="Plugins">
|
||
|
|
<link href="Plugins-GC.html#Plugins-GC" rel="next" title="Plugins GC">
|
||
|
|
<link href="Plugin-API.html#Plugin-API" rel="prev" title="Plugin API">
|
||
|
|
<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="Plugins-pass"></a>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="Plugins-GC.html#Plugins-GC" accesskey="n" rel="next">Plugins GC</a>, Previous: <a href="Plugin-API.html#Plugin-API" accesskey="p" rel="prev">Plugin API</a>, Up: <a href="Plugins.html#Plugins" accesskey="u" rel="up">Plugins</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="Interacting-with-the-pass-manager"></a>
|
||
|
|
<h3 class="section">24.3 Interacting with the pass manager</h3>
|
||
|
|
|
||
|
|
<p>There needs to be a way to add/reorder/remove passes dynamically. This
|
||
|
|
is useful for both analysis plugins (plugging in after a certain pass
|
||
|
|
such as CFG or an IPA pass) and optimization plugins.
|
||
|
|
</p>
|
||
|
|
<p>Basic support for inserting new passes or replacing existing passes is
|
||
|
|
provided. A plugin registers a new pass with GCC by calling
|
||
|
|
<code>register_callback</code> with the <code>PLUGIN_PASS_MANAGER_SETUP</code>
|
||
|
|
event and a pointer to a <code>struct register_pass_info</code> object defined as follows
|
||
|
|
</p>
|
||
|
|
<div class="smallexample">
|
||
|
|
<pre class="smallexample">enum pass_positioning_ops
|
||
|
|
{
|
||
|
|
PASS_POS_INSERT_AFTER, // Insert after the reference pass.
|
||
|
|
PASS_POS_INSERT_BEFORE, // Insert before the reference pass.
|
||
|
|
PASS_POS_REPLACE // Replace the reference pass.
|
||
|
|
};
|
||
|
|
|
||
|
|
struct register_pass_info
|
||
|
|
{
|
||
|
|
struct opt_pass *pass; /* New pass provided by the plugin. */
|
||
|
|
const char *reference_pass_name; /* Name of the reference pass for hooking
|
||
|
|
up the new pass. */
|
||
|
|
int ref_pass_instance_number; /* Insert the pass at the specified
|
||
|
|
instance number of the reference pass. */
|
||
|
|
/* Do it for every instance if it is 0. */
|
||
|
|
enum pass_positioning_ops pos_op; /* how to insert the new pass. */
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/* Sample plugin code that registers a new pass. */
|
||
|
|
int
|
||
|
|
plugin_init (struct plugin_name_args *plugin_info,
|
||
|
|
struct plugin_gcc_version *version)
|
||
|
|
{
|
||
|
|
struct register_pass_info pass_info;
|
||
|
|
|
||
|
|
...
|
||
|
|
|
||
|
|
/* Code to fill in the pass_info object with new pass information. */
|
||
|
|
|
||
|
|
...
|
||
|
|
|
||
|
|
/* Register the new pass. */
|
||
|
|
register_callback (plugin_info->base_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
|
||
|
|
|
||
|
|
...
|
||
|
|
}
|
||
|
|
</pre></div>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|