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110 lines
4.8 KiB
HTML
110 lines
4.8 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 files and streams (GNU Compiler Collection (GCC) Internals)</title>
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<meta name="description" content="Dump files and streams (GNU Compiler Collection (GCC) Internals)">
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<meta name="keywords" content="Dump files and streams (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="Dump-output-verbosity.html#Dump-output-verbosity" rel="next" title="Dump output verbosity">
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<link href="Optimization-groups.html#Optimization-groups" rel="prev" title="Optimization groups">
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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-files-and-streams"></a>
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<div class="header">
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<p>
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Next: <a href="Dump-output-verbosity.html#Dump-output-verbosity" accesskey="n" rel="next">Dump output verbosity</a>, Previous: <a href="Optimization-groups.html#Optimization-groups" accesskey="p" rel="prev">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-files-and-streams-1"></a>
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<h4 class="subsection">9.6.3 Dump files and streams</h4>
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<a name="index-optimization-info-file-names"></a>
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<p>There are two separate output streams available for outputting
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optimization information from passes. Note that both these streams
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accept <code>stderr</code> and <code>stdout</code> as valid streams and thus it is
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possible to dump output to standard output or error. This is specially
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handy for outputting all available information in a single file by
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redirecting <code>stderr</code>.
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</p>
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<dl compact="compact">
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<dt><code><code>pstream</code></code></dt>
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<dd><p>This stream is for pass-specific dump output. For example,
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<samp>-fdump-tree-vect=foo.v</samp> dumps tree vectorization pass output
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into the given file name <samp>foo.v</samp>. If the file name is not provided,
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the default file name is based on the source file and pass number. Note
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that one could also use special file names <code>stdout</code> and
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<code>stderr</code> for dumping to standard output and standard error
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respectively.
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</p>
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</dd>
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<dt><code><code>alt_stream</code></code></dt>
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<dd><p>This steam is used for printing optimization specific output in
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response to the <samp>-fopt-info</samp>. Again a file name can be given. If
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the file name is not given, it defaults to <code>stderr</code>.
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</p></dd>
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</dl>
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</body>
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</html>
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