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<title>GNU Compiler Collection (GCC) Internals: Torture Tests</title>
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<a name="Torture-Tests"></a>
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<p>
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Previous: <a href="compat-Testing.html#compat-Testing" accesskey="p" rel="prev">compat 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>
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<a name="Support-for-torture-testing-using-multiple-options"></a>
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<h3 class="section">7.10 Support for torture testing using multiple options</h3>
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<p>Throughout the compiler testsuite there are several directories whose
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tests are run multiple times, each with a different set of options.
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These are known as torture tests.
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<samp>lib/torture-options.exp</samp> defines procedures to
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set up these lists:
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</p>
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<dl compact="compact">
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<dt><code>torture-init</code></dt>
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<dd><p>Initialize use of torture lists.
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</p></dd>
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<dt><code>set-torture-options</code></dt>
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<dd><p>Set lists of torture options to use for tests with and without loops.
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Optionally combine a set of torture options with a set of other
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options, as is done with Objective-C runtime options.
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</p></dd>
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<dt><code>torture-finish</code></dt>
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<dd><p>Finalize use of torture lists.
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</p></dd>
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</dl>
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<p>The <samp>.exp</samp> file for a set of tests that use torture options must
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include calls to these three procedures if:
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</p>
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<ul>
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<li> It calls <code>gcc-dg-runtest</code> and overrides <var>DG_TORTURE_OPTIONS</var>.
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</li><li> It calls <var>${tool}</var><code>-torture</code> or
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<var>${tool}</var><code>-torture-execute</code>, where <var>tool</var> is <code>c</code>,
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<code>fortran</code>, or <code>objc</code>.
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</li><li> It calls <code>dg-pch</code>.
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</li></ul>
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<p>It is not necessary for a <samp>.exp</samp> file that calls <code>gcc-dg-runtest</code>
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to call the torture procedures if the tests should use the list in
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<var>DG_TORTURE_OPTIONS</var> defined in <samp>gcc-dg.exp</samp>.
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</p>
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<p>Most uses of torture options can override the default lists by defining
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<var>TORTURE_OPTIONS</var> or add to the default list by defining
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<var>ADDITIONAL_TORTURE_OPTIONS</var>. Define these in a <samp>.dejagnurc</samp>
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file or add them to the <samp>site.exp</samp> file; for example
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</p>
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<div class="smallexample">
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<pre class="smallexample">set ADDITIONAL_TORTURE_OPTIONS [list \
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{ -O2 -ftree-loop-linear } \
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{ -O2 -fpeel-loops } ]
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</pre></div>
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