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78 lines
3.4 KiB
HTML
78 lines
3.4 KiB
HTML
4 years ago
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<title>Dump setup - GNU Compiler Collection (GCC) Internals</title>
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<meta name="description" content="GNU Compiler Collection (GCC) Internals">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Optimization-info.html#Optimization-info" title="Optimization info">
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<link rel="next" href="Optimization-groups.html#Optimization-groups" title="Optimization groups">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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Copyright (C) 1988-2015 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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(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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</head>
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<body>
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<div class="node">
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<a name="Dump-setup"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Optimization-groups.html#Optimization-groups">Optimization groups</a>,
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Up: <a rel="up" accesskey="u" href="Optimization-info.html#Optimization-info">Optimization info</a>
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<hr>
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</div>
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<h4 class="subsection">9.7.1 Dump setup</h4>
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<p><a name="index-dump-setup-1696"></a>
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A dump_manager class is defined in <samp><span class="file">dumpfile.h</span></samp>. Various passes
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register dumping pass-specific information via <code>dump_register</code> in
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<samp><span class="file">passes.c</span></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>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>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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</body></html>
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