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Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
2 "http://www.w3.org/TR/html4/strict.dtd">
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]3<html>
Brian Gaekeaf19f2e2003-10-23 18:10:28 +0000[diff] [blame]4<head>
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]5 <title>LLVM Test Suite Guide</title>
6 <link rel="stylesheet" href="llvm.css" type="text/css">
Brian Gaekeaf19f2e2003-10-23 18:10:28 +0000[diff] [blame]7</head>
Brian Gaekeaf19f2e2003-10-23 18:10:28 +0000[diff] [blame]8<body>
9
10<div class="doc_title">
11 LLVM Test Suite Guide
12</div>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]13
Brian Gaekeaf19f2e2003-10-23 18:10:28 +0000[diff] [blame]14<ol>
15<li><a href="#overview">Overview</a></li>
16<li><a href="#Requirements">Requirements</a></li>
17<li><a href="#quick">Quick Start</a></li>
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]18<li><a href="#org">LLVM Test Suite Organization</a>
Brian Gaekeaf19f2e2003-10-23 18:10:28 +0000[diff] [blame]19<ul>
20 <li><a href="#codefragments">Code Fragments</a></li>
21 <li><a href="#wholeprograms">Whole Programs</a></li>
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]22</ul></li>
Brian Gaekeaf19f2e2003-10-23 18:10:28 +0000[diff] [blame]23<li><a href="#tree">LLVM Test Suite Tree</a></li>
24<li><a href="#qmstructure">QMTest Structure</a></li>
25<li><a href="#progstructure">Programs Structure</a></li>
26<li><a href="#run">Running the LLVM Tests</a></li>
Chris Lattnerfd9d1b32004-06-24 20:53:09 +0000[diff] [blame^]27<li><a href="#nightly">Running the nightly tester</a></li>
Brian Gaekeaf19f2e2003-10-23 18:10:28 +0000[diff] [blame]28</ol>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]29
Chris Lattner7911ce22004-05-23 21:07:27 +0000[diff] [blame]30<div class="doc_author">
31 <p>Written by John T. Criswell</p>
32</div>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]33
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]34<!--===============================================================-->
35<div class="doc_section"><a name="overview">Overview</a></div>
36<!--===============================================================-->
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]37
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]38<div class="doc_text">
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]39
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]40<p>This document is the reference manual for the LLVM test suite. It documents
41the structure of the LLVM test suite, the tools needed to use it, and how to add
42and run tests.</p>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]43
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]44</div>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]45
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]46<!--===============================================================-->
47<div class="doc_section"><a name="Requirements">Requirements</a></div>
48<!--===============================================================-->
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]49
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]50<div class="doc_text">
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]51
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]52<p>In order to use the LLVM test suite, you will need all of the software
53required to build LLVM, plus the following:</p>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]54
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]55<dl>
56 <dt><a href="http://www.qmtest.com">QMTest</A></dt>
Reid Spencerec86a7a2004-06-20 19:21:11 +0000[diff] [blame]57 <dd>The LLVM test suite uses QMTest to organize and run tests. <b>Note:
Brian Gaeke826c5e82004-06-22 19:06:49 +0000[diff] [blame]58 you will need <a href="http://llvm.cs.uiuc.edu/qm-2.0.3.tar.gz">QMTest
59 2.0.3 (source tar.gz file)</a> to be successful. The tests do not run with
Reid Spencerec86a7a2004-06-20 19:21:11 +0000[diff] [blame]60 any other version.</b></dd>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]61
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]62 <dt><a href="http://www.python.org">Python</A></dt>
63 <dd>You will need a Python interpreter that works with QMTest. Python will
64 need zlib and SAX support enabled.</dd>
65</dl>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]66
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]67</div>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]68
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]69<!--===============================================================-->
70<div class="doc_section"><a name="quick">Quick Start</a></div>
71<!--===============================================================-->
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]72
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]73<div class="doc_text">
Brian Gaekeaf19f2e2003-10-23 18:10:28 +0000[diff] [blame]74
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]75<p> The tests are located in the LLVM source tree under the directory
76<tt>llvm/test</tt>. To run all of the tests in LLVM, use the Master Makefile in
77that directory:</p>
Brian Gaekeaf19f2e2003-10-23 18:10:28 +0000[diff] [blame]78
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]79<pre>
80 % gmake -C llvm/test
81</pre>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]82
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]83<p>To run only the code fragment tests (i.e. those that do basic testing of
84LLVM), run the tests organized by QMTest:</p>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]85
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]86<pre>
87 % gmake -C llvm/test qmtest
88</pre>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]89
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]90<p>To run only the tests that compile and execute whole programs, run the
91Programs tests:</p>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]92
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]93<pre>
94 % gmake -C llvm/test/Programs
95</pre>
96
97</div>
98
99<!--===============================================================-->
100<div class="doc_section"><a name="org">LLVM Test Suite Organization</a></div>
101<!--===============================================================-->
102
103<div class="doc_text">
104
105<p>The LLVM test suite contains two major categories of tests: code
106fragments and whole programs.</p>
107
108</div>
109
110<div class="doc_subsection"><a name="codefragments">Code Fragments</a>
111</div>
112
113<div class="doc_text">
114
115<p>Code fragments are small pieces of code that test a specific feature of LLVM
116or trigger a specific bug in LLVM. They are usually written in LLVM assembly
117language, but can be written in other languages if the test targets a particular
118language front end.</p>
119
120<p>Code fragments are not complete programs, and they are never executed to
121determine correct behavior.</p>
122
123<p>The tests in the Features and Regression directories contain code
124fragments.</p>
125
126</div>
127
128<div class="doc_subsection"><a name="wholeprograms">Whole Programs</a></div>
129
130<div class="doc_text">
131
132<p>Whole Programs are pieces of code which can be compiled and linked into a
133stand-alone program that can be executed. These programs are generally written
134in high level languages such as C or C++, but sometimes they are written
135straight in LLVM assembly.</p>
136
137<p>These programs are compiled and then executed using several different
138methods (native compiler, LLVM C backend, LLVM JIT, LLVM native code generation,
139etc). The output of these programs is compared to ensure that LLVM is compiling
140the program correctly.</p>
141
142<p>In addition to compiling and executing programs, whole program tests serve as
143a way of benchmarking LLVM performance, both in terms of the efficiency of the
144programs generated as well as the speed with which LLVM compiles, optimizes, and
145generates code.</p>
146
147<p>The Programs directory contains all tests which compile and benchmark whole
148programs.</p>
149
150</div>
151
152<!--===============================================================-->
153<div class="doc_section"><a name="tree">LLVM Test Suite Tree</a></div>
154<!--===============================================================-->
155
156<div class="doc_text">
157
158<p>Each type of test in the LLVM test suite has its own directory. The major
159subtrees of the test suite directory tree are as follows:</p>
160
161<ul>
162 <li>Features
163 <p>This directory contains sample codes that test various features of the
164 LLVM language. These pieces of sample code are run through various
165 assembler, disassembler, and optimizer passes.</p>
166
167 <li>Regression
168 <p>This directory contains regression tests for LLVM. When a bug is found
169 in LLVM, a regression test containing just enough code to reproduce the
170 problem should be written and placed somewhere underneath this directory.
171 In most cases, this will be a small piece of LLVM assembly language code,
172 often distilled from an actual application or benchmark.</p>
173
174 <li>Programs
175 <p>The Programs directory contains programs that can be compiled with LLVM
176 and executed. These programs are compiled using the native compiler and
177 various LLVM backends. The output from the program compiled with the native
178 compiler is assumed correct; the results from the other programs are
179 compared to the native program output and pass if they match. </p>
180
181 <p> In addition for testing correctness, the Programs directory also
182 performs timing tests of various LLVM optimizations. It also records
183 compilation times for the compilers and the JIT. This information can be
184 used to compare the effectiveness of LLVM's optimizations and code
185 generation.</p>
186
187 <p>The Programs directory is subdivided into several smaller subdirectories:
188 </p>
189
190 <ul>
191 <li>Programs/SingleSource
192 <p>The SingleSource directory contains test programs that are only a
193 single source file in size. These are usually small benchmark programs
194 or small programs that calculate a particular value. Several such
195 programs are grouped together in each directory.</p></li>
196
197 <li>Programs/MultiSource
198 <p>The MultiSource directory contains subdirectories which contain
199 entire programs with multiple source files. Large benchmarks and whole
200 applications go here.</p></li>
201
202 <li>Programs/External
203 <p>The External directory contains Makefiles for building code that is
204 external to (i.e. not distributed with) LLVM. The most prominent member
205 of this directory is the SPEC 2000 benchmark suite. The presence and
206 location of these external programs is configured by the LLVM
207 <tt>configure</tt> script.</p></li>
Brian Gaekeaf19f2e2003-10-23 18:10:28 +0000[diff] [blame]208
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]209 </ul></li>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]210
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]211 <li>QMTest
212 <p>This directory contains the QMTest information files. Inside this
213 directory are QMTest administration files and the Python code that
214 implements the LLVM test and database classes.</p>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]215
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]216</ul>
Brian Gaekeaf19f2e2003-10-23 18:10:28 +0000[diff] [blame]217
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]218</div>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]219
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]220<!--===============================================================-->
221<div class="doc_section"><a name="qmstructure">QMTest Structure</a></div>
222<!--===============================================================-->
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]223
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]224<div class="doc_text">
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]225
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]226<p>The LLVM test suite is partially driven by QMTest and partially
227driven by GNU Make. Specifically, the Features and Regression tests
228are all driven by QMTest. The Programs directory is currently
229driven by a set of Makefiles.</p>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]230
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]231<p>The QMTest system needs to have several pieces of information
232available; these pieces of configuration information are known
233collectively as the "context" in QMTest parlance. Since the context
234for LLVM is relatively large, the master Makefile in llvm/test
235sets it for you.</p>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]236
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]237<p>The LLVM database class makes the subdirectories of llvm/test a
238QMTest test database. For each directory that contains tests driven by
239QMTest, it knows what type of test the source file is and how to run it.</p>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]240
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]241<p>Hence, the QMTest namespace is essentially what you see in the
242Feature and Regression directories, but there is some magic that
243the database class performs (as described below).</p>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]244
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]245<p>The QMTest namespace is currently composed of the following tests and test
246suites:</p>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]247
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]248<ul>
249 <li>Feature
250 <p>
251 These are the feature tests found in the Feature directory.
252 They are broken up into the following categories:
253 </p>
254 <ul>
255 <li>ad
256 <p>Assembler/Disassembler tests. These tests verify that a piece of LLVM
257 assembly language can be assembled into bytecode and then disassembled
258 into the original assembly language code. It does this several times to
259 ensure that assembled output can be disassembled and disassembler output
260 can be assembled. It also verifies that the give assembly language file
261 can be assembled correctly.</p></li>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]262
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]263 <li>opt
264 <p>Optimizer tests. These tests verify that two of the optimizer passes
265 completely optimize a program (i.e. after a single pass, they cannot
266 optimize a program any further).</p></li>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]267
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]268 <li>mc
269 <p> Machine code tests. These tests verify that the LLVM assembly
270 language file can be translated into native assembly code.</p></li>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]271
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]272 <li>cc
273 <p>C code tests. These tests verify that the specified LLVM assembly
274 code can be converted into C source code using the C backend.</p></li>
275 </ul>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]276
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]277 <p>The LLVM database class looks at every file in the Feature directory and
278 creates a fake test hierarchy containing
279 <tt>Feature.&lt;testtype&gt;.&lt;testname&gt;</tt>. So, if you add an LLVM
280 assembly language file to the Feature directory, it actually creates 5 new
281 tests: assembler/disassembler, assembler, optimizer, machine code, and C code.
282 </p>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]283
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]284 <li>Regression
285 <p>These are the regression tests. There is one suite for each
286 subdirectory of the Regression directory. If you add a new subdirectory
287 there, you will need to modify, at least, the <tt>RegressionMap</tt>
288 variable in <tt>QMTest/llvmdb.py</tt> so that QMTest knows how to run the
289 tests in the new subdirectory.</p>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]290
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]291</ul>
292
293</div>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]294
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]295<!--===============================================================-->
296<div class="doc_section"><a name="progstructure">Programs Structure</a></div>
297<!--===============================================================-->
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]298
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]299<div class="doc_text">
Brian Gaekeaf19f2e2003-10-23 18:10:28 +0000[diff] [blame]300
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]301<p>As mentioned previously, the Programs tree in llvm/test provides three types
302of tests: MultiSource, SingleSource, and External. Each tree is then subdivided
303into several categories, including applications, benchmarks, regression tests,
304code that is strange grammatically, etc. These organizations should be
305relatively self explanatory.</p>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]306
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]307<p>In addition to the regular Programs tests, the Programs tree also provides a
308mechanism for compiling the programs in different ways. If the variable TEST is
309defined on the gmake command line, the test system will include a Makefile named
310<tt>TEST.&lt;value of TEST variable&gt;.Makefile</tt>. This Makefile can modify
311build rules to yield different results.</p>
312
313<p>For example, the LLVM nightly tester uses <tt>TEST.nightly.Makefile</tt> to
314create the nightly test reports. To run the nightly tests, run <tt>gmake
315TEST=nightly</tt>.</p>
316
317<p>There are several TEST Makefiles available in the tree. Some of them are
318designed for internal LLVM research and will not work outside of the LLVM
319research group. They may still be valuable, however, as a guide to writing your
320own TEST Makefile for any optimization or analysis passes that you develop with
321LLVM.</p>
322
323</div>
324
325<!--===============================================================-->
326<div class="doc_section"><a name="run">Running the LLVM Tests</a></div>
327<!--===============================================================-->
328
329<div class="doc_text">
330
331<p>First, all tests are executed within the LLVM object directory tree. They
332<i>are not</i> executed inside of the LLVM source tree. This is because the
333test suite creates temporary files during execution. </p>
334
335<p>The master Makefile in llvm/test is capable of running both the QMTest driven
336tests and the Programs tests. By default, it will run all of the tests.</p>
337
338<p>To run only the QMTest driven tests, run <tt>gmake qmtest</tt> at the
339command line in llvm/tests. To run a specific qmtest, suffix the test name with
340".t" when running gmake.</p>
341
342<p>For example, to run the Regression.LLC tests, type <tt>gmake
343Regression.LLC.t</tt> in llvm/tests.</p>
344
345<p>Note that the Makefiles in llvm/test/Features and llvm/test/Regression are
346gone. You must now use QMTest from the llvm/test directory to run them.</p>
347
348<p>To run the Programs test, cd into the llvm/test/Programs directory and type
349<tt>gmake</tt>. Alternatively, you can type <tt>gmake TEST=&lt;type&gt;
350test</tt> to run one of the specialized tests in
351llvm/test/Programs/TEST.&lt;type&gt;.Makefile. For example, you could run the
352nightly tester tests using the following commands:</p>
353
354<pre>
355 % cd llvm/test/Programs
356 % gmake TEST=nightly test
357</pre>
358
359<p>Regardless of which test you're running, the results are printed on standard
360output and standard error. You can redirect these results to a file if you
361choose.</p>
362
363<p>Some tests are known to fail. Some are bugs that we have not fixed yet;
364others are features that we haven't added yet (or may never add). In QMTest,
365the result for such tests will be XFAIL (eXpected FAILure). In this way, you
366can tell the difference between an expected and unexpected failure.</p>
367
368<p>The Programs tests have no such feature as of this time. If the test passes,
369only warnings and other miscellaneous output will be generated. If a test
370fails, a large &lt;program&gt; FAILED message will be displayed. This will help
371you separate benign warnings from actual test failures.</p>
Chris Lattnerfd9d1b32004-06-24 20:53:09 +0000[diff] [blame^]372
373</div>
374
375<!--===============================================================-->
376<div class="doc_section"><a name="nightly">Running the nightly tester</a></div>
377<!--===============================================================-->
378
379<div class="doc_text">
380
381<p>
382The <a href="http://llvm.cs.uiuc.edu/testresults/">LLVM Nightly Testers</a>
383automatically check out an LLVM tree, build it, run the "nightly"
384program test (described above) and all of the regression tests, then
385delete the checked out tree. This tester is designed to ensure that
386programs don't break as well as keep track of LLVM's progress over time.</p>
387
388<p>
389If you'd like to set up an instance of the nightly tester to run on your
390machine, take a look at the comments at the top of the utils/NightlyTester.pl
391file. We usually run it from a crontab entry that looks ilke this:
392</p>
393
394<pre>
3955 3 * * * LLVM_LIB_SEARCH_PATH=.../llvm-gcc/bytecode-libs $HOME/llvm/utils/NightlyTest.pl -parallel -enable-linscan ...CVSREPOSTRING... $HOME/buildtest-X86 $HOME/cvs/testresults-X86
396</pre>
397
398<p>
399Take a look at the NightlyTest.pl file to see what all of the flags and
400strings do. If you start running the nightly tests, please let us know and
401we'll link your page to the global tester page. Thanks!
402</p>
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]403
404</div>
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]405
Brian Gaekeaf19f2e2003-10-23 18:10:28 +0000[diff] [blame]406<!-- *********************************************************************** -->
John Criswell020cbd82003-10-10 18:42:49 +0000[diff] [blame]407
Misha Brukman1d83e112004-03-01 18:21:04 +0000[diff] [blame]408<hr>
409<address>
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