diff options
Diffstat (limited to 'share/doc/gccint/Plugins-pass.html')
| -rw-r--r-- | share/doc/gccint/Plugins-pass.html | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/share/doc/gccint/Plugins-pass.html b/share/doc/gccint/Plugins-pass.html new file mode 100644 index 0000000..5351d6f --- /dev/null +++ b/share/doc/gccint/Plugins-pass.html @@ -0,0 +1,134 @@ +<!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: Plugins pass</title> + +<meta name="description" content="GNU Compiler Collection (GCC) Internals: Plugins pass"> +<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: Plugins pass"> +<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="previous" title="Plugin API"> +<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="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="previous">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> |