You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
135 lines
5.3 KiB
HTML
135 lines
5.3 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
|
<html>
|
|
<!-- Copyright (C) 1988-2018 Free Software Foundation, Inc.
|
|
|
|
Permission is granted to copy, distribute and/or modify this document
|
|
under the terms of the GNU Free Documentation License, Version 1.3 or
|
|
any later version published by the Free Software Foundation; with the
|
|
Invariant Sections being "Funding Free Software", the Front-Cover
|
|
Texts being (a) (see below), and with the Back-Cover Texts being (b)
|
|
(see below). A copy of the license is included in the section entitled
|
|
"GNU Free Documentation License".
|
|
|
|
(a) The FSF's Front-Cover Text is:
|
|
|
|
A GNU Manual
|
|
|
|
(b) The FSF's Back-Cover Text is:
|
|
|
|
You have freedom to copy and modify this GNU Manual, like GNU
|
|
software. Copies published by the Free Software Foundation raise
|
|
funds for GNU development. -->
|
|
<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
|
|
<head>
|
|
<title>profopt Testing (GNU Compiler Collection (GCC) Internals)</title>
|
|
|
|
<meta name="description" content="profopt Testing (GNU Compiler Collection (GCC) Internals)">
|
|
<meta name="keywords" content="profopt Testing (GNU Compiler Collection (GCC) Internals)">
|
|
<meta name="resource-type" content="document">
|
|
<meta name="distribution" content="global">
|
|
<meta name="Generator" content="makeinfo">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
|
<link href="index.html#Top" rel="start" title="Top">
|
|
<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
|
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
|
<link href="Testsuites.html#Testsuites" rel="up" title="Testsuites">
|
|
<link href="compat-Testing.html#compat-Testing" rel="next" title="compat Testing">
|
|
<link href="gcov-Testing.html#gcov-Testing" rel="prev" title="gcov Testing">
|
|
<style type="text/css">
|
|
<!--
|
|
a.summary-letter {text-decoration: none}
|
|
blockquote.indentedblock {margin-right: 0em}
|
|
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
|
|
blockquote.smallquotation {font-size: smaller}
|
|
div.display {margin-left: 3.2em}
|
|
div.example {margin-left: 3.2em}
|
|
div.lisp {margin-left: 3.2em}
|
|
div.smalldisplay {margin-left: 3.2em}
|
|
div.smallexample {margin-left: 3.2em}
|
|
div.smalllisp {margin-left: 3.2em}
|
|
kbd {font-style: oblique}
|
|
pre.display {font-family: inherit}
|
|
pre.format {font-family: inherit}
|
|
pre.menu-comment {font-family: serif}
|
|
pre.menu-preformatted {font-family: serif}
|
|
pre.smalldisplay {font-family: inherit; font-size: smaller}
|
|
pre.smallexample {font-size: smaller}
|
|
pre.smallformat {font-family: inherit; font-size: smaller}
|
|
pre.smalllisp {font-size: smaller}
|
|
span.nolinebreak {white-space: nowrap}
|
|
span.roman {font-family: initial; font-weight: normal}
|
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
|
ul.no-bullet {list-style: none}
|
|
-->
|
|
</style>
|
|
|
|
|
|
</head>
|
|
|
|
<body lang="en">
|
|
<a name="profopt-Testing"></a>
|
|
<div class="header">
|
|
<p>
|
|
Next: <a href="compat-Testing.html#compat-Testing" accesskey="n" rel="next">compat Testing</a>, Previous: <a href="gcov-Testing.html#gcov-Testing" accesskey="p" rel="prev">gcov Testing</a>, Up: <a href="Testsuites.html#Testsuites" accesskey="u" rel="up">Testsuites</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>
|
|
</div>
|
|
<hr>
|
|
<a name="Support-for-testing-profile_002ddirected-optimizations"></a>
|
|
<h3 class="section">7.7 Support for testing profile-directed optimizations</h3>
|
|
|
|
<p>The file <samp>profopt.exp</samp> provides language-independent support for
|
|
checking correct execution of a test built with profile-directed
|
|
optimization. This testing requires that a test program be built and
|
|
executed twice. The first time it is compiled to generate profile
|
|
data, and the second time it is compiled to use the data that was
|
|
generated during the first execution. The second execution is to
|
|
verify that the test produces the expected results.
|
|
</p>
|
|
<p>To check that the optimization actually generated better code, a
|
|
test can be built and run a third time with normal optimizations to
|
|
verify that the performance is better with the profile-directed
|
|
optimizations. <samp>profopt.exp</samp> has the beginnings of this kind
|
|
of support.
|
|
</p>
|
|
<p><samp>profopt.exp</samp> provides generic support for profile-directed
|
|
optimizations. Each set of tests that uses it provides information
|
|
about a specific optimization:
|
|
</p>
|
|
<dl compact="compact">
|
|
<dt><code>tool</code></dt>
|
|
<dd><p>tool being tested, e.g., <code>gcc</code>
|
|
</p>
|
|
</dd>
|
|
<dt><code>profile_option</code></dt>
|
|
<dd><p>options used to generate profile data
|
|
</p>
|
|
</dd>
|
|
<dt><code>feedback_option</code></dt>
|
|
<dd><p>options used to optimize using that profile data
|
|
</p>
|
|
</dd>
|
|
<dt><code>prof_ext</code></dt>
|
|
<dd><p>suffix of profile data files
|
|
</p>
|
|
</dd>
|
|
<dt><code>PROFOPT_OPTIONS</code></dt>
|
|
<dd><p>list of options with which to run each test, similar to the lists for
|
|
torture tests
|
|
</p>
|
|
</dd>
|
|
<dt><code>{ dg-final-generate { <var>local-directive</var> } }</code></dt>
|
|
<dd><p>This directive is similar to <code>dg-final</code>, but the
|
|
<var>local-directive</var> is run after the generation of profile data.
|
|
</p>
|
|
</dd>
|
|
<dt><code>{ dg-final-use { <var>local-directive</var> } }</code></dt>
|
|
<dd><p>The <var>local-directive</var> is run after the profile data have been
|
|
used.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
|
|
|
|
|
|
</body>
|
|
</html>
|