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105 lines
4.6 KiB
HTML
105 lines
4.6 KiB
HTML
4 years ago
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<!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>Dump setup (GNU Compiler Collection (GCC) Internals)</title>
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<meta name="description" content="Dump setup (GNU Compiler Collection (GCC) Internals)">
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<meta name="keywords" content="Dump setup (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="Optimization-info.html#Optimization-info" rel="up" title="Optimization info">
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<link href="Optimization-groups.html#Optimization-groups" rel="next" title="Optimization groups">
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<link href="Optimization-info.html#Optimization-info" rel="prev" title="Optimization info">
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<style type="text/css">
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ul.no-bullet {list-style: none}
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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="Dump-setup"></a>
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<div class="header">
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<p>
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Next: <a href="Optimization-groups.html#Optimization-groups" accesskey="n" rel="next">Optimization groups</a>, Up: <a href="Optimization-info.html#Optimization-info" accesskey="u" rel="up">Optimization info</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="Dump-setup-1"></a>
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<h4 class="subsection">9.6.1 Dump setup</h4>
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<a name="index-dump-setup"></a>
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<p>A dump_manager class is defined in <samp>dumpfile.h</samp>. Various passes
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register dumping pass-specific information via <code>dump_register</code> in
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<samp>passes.c</samp>. During the registration, an optimization pass can
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select its optimization group (see <a href="Optimization-groups.html#Optimization-groups">Optimization groups</a>). After
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that optimization information corresponding to the entire group
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(presumably from multiple passes) can be output via command-line
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switches. Note that if a pass does not fit into any of the pre-defined
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groups, it can select <code>OPTGROUP_NONE</code>.
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</p>
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<p>Note that in general, a pass need not know its dump output file name,
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whether certain flags are enabled, etc. However, for legacy reasons,
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passes could also call <code>dump_begin</code> which returns a stream in
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case the particular pass has optimization dumps enabled. A pass could
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call <code>dump_end</code> when the dump has ended. These methods should go
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away once all the passes are converted to use the new dump
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infrastructure.
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</p>
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<p>The recommended way to setup the dump output is via <code>dump_start</code>
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and <code>dump_end</code>.
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</p>
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</body>
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</html>
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