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