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64 lines
2.5 KiB
HTML
64 lines
2.5 KiB
HTML
4 years ago
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<head>
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<title>Annotations - GNU Compiler Collection (GCC) Internals</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="GNU Compiler Collection (GCC) Internals">
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<meta name="generator" content="makeinfo 4.13">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Tree-SSA.html#Tree-SSA" title="Tree SSA">
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<link rel="next" href="SSA-Operands.html#SSA-Operands" title="SSA Operands">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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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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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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<style type="text/css"><!--
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--></style>
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</head>
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<body>
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<div class="node">
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<a name="Annotations"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="SSA-Operands.html#SSA-Operands">SSA Operands</a>,
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Up: <a rel="up" accesskey="u" href="Tree-SSA.html#Tree-SSA">Tree SSA</a>
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<hr>
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</div>
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<h3 class="section">12.1 Annotations</h3>
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<p><a name="index-annotations-2507"></a>
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The optimizers need to associate attributes with variables during the
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optimization process. For instance, we need to know whether a
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variable has aliases. All these attributes are stored in data
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structures called annotations which are then linked to the field
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<code>ann</code> in <code>struct tree_common</code>.
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</body></html>
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