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76 lines
3.4 KiB
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76 lines
3.4 KiB
HTML
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<title>LTO - GNU Compiler Collection (GCC) Internals</title>
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<link rel="prev" href="Plugins.html#Plugins" title="Plugins">
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<link rel="next" href="Match-and-Simplify.html#Match-and-Simplify" title="Match and Simplify">
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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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(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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<body>
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<div class="node">
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<a name="LTO"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Match-and-Simplify.html#Match-and-Simplify">Match and Simplify</a>,
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Previous: <a rel="previous" accesskey="p" href="Plugins.html#Plugins">Plugins</a>,
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Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a>
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<hr>
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</div>
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<h2 class="chapter">24 Link Time Optimization</h2>
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<p><a name="index-lto-5103"></a><a name="index-whopr-5104"></a><a name="index-wpa-5105"></a><a name="index-ltrans-5106"></a>
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Link Time Optimization (LTO) gives GCC the capability of
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dumping its internal representation (GIMPLE) to disk,
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so that all the different compilation units that make up
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a single executable can be optimized as a single module.
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This expands the scope of inter-procedural optimizations
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to encompass the whole program (or, rather, everything
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that is visible at link time).
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<ul class="menu">
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<li><a accesskey="1" href="LTO-Overview.html#LTO-Overview">LTO Overview</a>: Overview of LTO.
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<li><a accesskey="2" href="LTO-object-file-layout.html#LTO-object-file-layout">LTO object file layout</a>: LTO file sections in ELF.
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<li><a accesskey="3" href="IPA.html#IPA">IPA</a>: Using summary information in IPA passes.
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<li><a accesskey="4" href="WHOPR.html#WHOPR">WHOPR</a>: Whole program assumptions,
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linker plugin and symbol visibilities.
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<li><a accesskey="5" href="Internal-flags.html#Internal-flags">Internal flags</a>: Internal flags controlling <code>lto1</code>.
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</ul>
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</body></html>
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