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139 lines
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<title>C Tests - GNU Compiler Collection (GCC) Internals</title>
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<meta name="description" content="GNU Compiler Collection (GCC) Internals">
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<link rel="up" href="Testsuites.html#Testsuites" title="Testsuites">
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<link rel="prev" href="Ada-Tests.html#Ada-Tests" title="Ada Tests">
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<link rel="next" href="libgcj-Tests.html#libgcj-Tests" title="libgcj Tests">
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A GNU Manual
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<a name="C-Tests"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="libgcj-Tests.html#libgcj-Tests">libgcj Tests</a>,
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Previous: <a rel="previous" accesskey="p" href="Ada-Tests.html#Ada-Tests">Ada Tests</a>,
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Up: <a rel="up" accesskey="u" href="Testsuites.html#Testsuites">Testsuites</a>
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<hr>
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</div>
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<h3 class="section">7.4 C Language Testsuites</h3>
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<p>GCC contains the following C language testsuites, in the
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<samp><span class="file">gcc/testsuite</span></samp> directory:
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<dl>
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<dt><samp><span class="file">gcc.dg</span></samp><dd>This contains tests of particular features of the C compiler, using the
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more modern ‘<samp><span class="samp">dg</span></samp>’ harness. Correctness tests for various compiler
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features should go here if possible.
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<p>Magic comments determine whether the file
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is preprocessed, compiled, linked or run. In these tests, error and warning
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message texts are compared against expected texts or regular expressions
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given in comments. These tests are run with the options ‘<samp><span class="samp">-ansi -pedantic</span></samp>’
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unless other options are given in the test. Except as noted below they
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are not run with multiple optimization options.
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<br><dt><samp><span class="file">gcc.dg/compat</span></samp><dd>This subdirectory contains tests for binary compatibility using
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<samp><span class="file">lib/compat.exp</span></samp>, which in turn uses the language-independent support
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(see <a href="compat-Testing.html#compat-Testing">Support for testing binary compatibility</a>).
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<br><dt><samp><span class="file">gcc.dg/cpp</span></samp><dd>This subdirectory contains tests of the preprocessor.
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<br><dt><samp><span class="file">gcc.dg/debug</span></samp><dd>This subdirectory contains tests for debug formats. Tests in this
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subdirectory are run for each debug format that the compiler supports.
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<br><dt><samp><span class="file">gcc.dg/format</span></samp><dd>This subdirectory contains tests of the <samp><span class="option">-Wformat</span></samp> format
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checking. Tests in this directory are run with and without
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<samp><span class="option">-DWIDE</span></samp>.
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<br><dt><samp><span class="file">gcc.dg/noncompile</span></samp><dd>This subdirectory contains tests of code that should not compile and
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does not need any special compilation options. They are run with
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multiple optimization options, since sometimes invalid code crashes
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the compiler with optimization.
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<br><dt><samp><span class="file">gcc.dg/special</span></samp><dd>FIXME: describe this.
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<br><dt><samp><span class="file">gcc.c-torture</span></samp><dd>This contains particular code fragments which have historically broken easily.
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These tests are run with multiple optimization options, so tests for features
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which only break at some optimization levels belong here. This also contains
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tests to check that certain optimizations occur. It might be worthwhile to
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separate the correctness tests cleanly from the code quality tests, but
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it hasn't been done yet.
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<br><dt><samp><span class="file">gcc.c-torture/compat</span></samp><dd>FIXME: describe this.
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<p>This directory should probably not be used for new tests.
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<br><dt><samp><span class="file">gcc.c-torture/compile</span></samp><dd>This testsuite contains test cases that should compile, but do not
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need to link or run. These test cases are compiled with several
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different combinations of optimization options. All warnings are
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disabled for these test cases, so this directory is not suitable if
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you wish to test for the presence or absence of compiler warnings.
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While special options can be set, and tests disabled on specific
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platforms, by the use of <samp><span class="file">.x</span></samp> files, mostly these test cases
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should not contain platform dependencies. FIXME: discuss how defines
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such as <code>NO_LABEL_VALUES</code> and <code>STACK_SIZE</code> are used.
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<br><dt><samp><span class="file">gcc.c-torture/execute</span></samp><dd>This testsuite contains test cases that should compile, link and run;
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otherwise the same comments as for <samp><span class="file">gcc.c-torture/compile</span></samp> apply.
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<br><dt><samp><span class="file">gcc.c-torture/execute/ieee</span></samp><dd>This contains tests which are specific to IEEE floating point.
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<br><dt><samp><span class="file">gcc.c-torture/unsorted</span></samp><dd>FIXME: describe this.
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<p>This directory should probably not be used for new tests.
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<br><dt><samp><span class="file">gcc.misc-tests</span></samp><dd>This directory contains C tests that require special handling. Some
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of these tests have individual expect files, and others share
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special-purpose expect files:
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<dl>
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<dt><samp><code>bprob*.c</code></samp><dd>Test <samp><span class="option">-fbranch-probabilities</span></samp> using
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<samp><span class="file">gcc.misc-tests/bprob.exp</span></samp>, which
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in turn uses the generic, language-independent framework
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(see <a href="profopt-Testing.html#profopt-Testing">Support for testing profile-directed optimizations</a>).
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<br><dt><samp><code>gcov*.c</code></samp><dd>Test <samp><span class="command">gcov</span></samp> output using <samp><span class="file">gcov.exp</span></samp>, which in turn uses the
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language-independent support (see <a href="gcov-Testing.html#gcov-Testing">Support for testing gcov</a>).
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<br><dt><samp><code>i386-pf-*.c</code></samp><dd>Test i386-specific support for data prefetch using <samp><span class="file">i386-prefetch.exp</span></samp>.
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</dl>
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<br><dt><samp><span class="file">gcc.test-framework</span></samp><dd>
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<dl>
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<dt><samp><code>dg-*.c</code></samp><dd>Test the testsuite itself using <samp><span class="file">gcc.test-framework/test-framework.exp</span></samp>.
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</dl>
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</dl>
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<p>FIXME: merge in <samp><span class="file">testsuite/README.gcc</span></samp> and discuss the format of
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test cases and magic comments more.
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</body></html>
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