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| author | Daniel Dunbar <daniel@zuster.org> | 2012-03-15 22:19:35 +0000 |
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| committer | Daniel Dunbar <daniel@zuster.org> | 2012-03-15 22:19:35 +0000 |
| commit | 90d9e022850240e3b5a8f943ea8e7b85987673b3 (patch) | |
| tree | 8c2430be498496b2c242203a1af8ba5e0a39024a /docs/TestSuiteMakefileGuide.html | |
| parent | 530b19b70212f02cffa971256501e77284c320a0 (diff) | |
| download | external_llvm-90d9e022850240e3b5a8f943ea8e7b85987673b3.zip external_llvm-90d9e022850240e3b5a8f943ea8e7b85987673b3.tar.gz external_llvm-90d9e022850240e3b5a8f943ea8e7b85987673b3.tar.bz2 | |
docs: Update TestingGuide to change recommended practice to using LNT to drive
the test-suite.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152860 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/TestSuiteMakefileGuide.html')
| -rw-r--r-- | docs/TestSuiteMakefileGuide.html | 351 |
1 files changed, 351 insertions, 0 deletions
diff --git a/docs/TestSuiteMakefileGuide.html b/docs/TestSuiteMakefileGuide.html new file mode 100644 index 0000000..876fe42 --- /dev/null +++ b/docs/TestSuiteMakefileGuide.html @@ -0,0 +1,351 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" + "http://www.w3.org/TR/html4/strict.dtd"> +<html> +<head> + <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> + <title>LLVM test-suite Makefile Guide</title> + <link rel="stylesheet" href="llvm.css" type="text/css"> +</head> +<body> + +<h1> + LLVM test-suite Makefile Guide +</h1> + +<ol> + <li><a href="#overview">Overview</a></li> + <li><a href="#testsuitestructure">Test suite structure</a></li> + <li><a href="#testsuiterun">Running the test suite</a> + <ul> + <li><a href="#testsuiteexternal">Configuring External Tests</a></li> + <li><a href="#testsuitetests">Running different tests</a></li> + <li><a href="#testsuiteoutput">Generating test output</a></li> + <li><a href="#testsuitecustom">Writing custom tests for test-suite</a></li> + </ul> + </li> +</ol> + +<div class="doc_author"> + <p>Written by John T. Criswell, Daniel Dunbar, Reid Spencer, and Tanya Lattner</p> +</div> + +<!--=========================================================================--> +<h2><a name="overview">Overview</a></h2> +<!--=========================================================================--> + +<div> + +<p>This document describes the features of the Makefile-based LLVM +test-suite. This way of interacting with the test-suite is deprecated in favor +of running the test-suite using LNT, but may continue to prove useful for some +users. See the Testing +Guide's <a href="TestingGuide.html#testsuitequickstart">test-suite +Quickstart</a> section for more information.</p> + +</div> + +<!--=========================================================================--> +<h2><a name="testsuitestructure">Test suite Structure</a></h2> +<!--=========================================================================--> + +<div> + +<p>The <tt>test-suite</tt> module contains a number of programs that can be compiled +with LLVM and executed. These programs are compiled using the native compiler +and various LLVM backends. The output from the program compiled with the +native compiler is assumed correct; the results from the other programs are +compared to the native program output and pass if they match.</p> + +<p>When executing tests, it is usually a good idea to start out with a subset of +the available tests or programs. This makes test run times smaller at first and +later on this is useful to investigate individual test failures. To run some +test only on a subset of programs, simply change directory to the programs you +want tested and run <tt>gmake</tt> there. Alternatively, you can run a different +test using the <tt>TEST</tt> variable to change what tests or run on the +selected programs (see below for more info).</p> + +<p>In addition for testing correctness, the <tt>test-suite</tt> directory also +performs timing tests of various LLVM optimizations. It also records +compilation times for the compilers and the JIT. This information can be +used to compare the effectiveness of LLVM's optimizations and code +generation.</p> + +<p><tt>test-suite</tt> tests are divided into three types of tests: MultiSource, +SingleSource, and External.</p> + +<ul> +<li><tt>test-suite/SingleSource</tt> +<p>The SingleSource directory contains test programs that are only a single +source file in size. These are usually small benchmark programs or small +programs that calculate a particular value. Several such programs are grouped +together in each directory.</p></li> + +<li><tt>test-suite/MultiSource</tt> +<p>The MultiSource directory contains subdirectories which contain entire +programs with multiple source files. Large benchmarks and whole applications +go here.</p></li> + +<li><tt>test-suite/External</tt> +<p>The External directory contains Makefiles for building code that is external +to (i.e., not distributed with) LLVM. The most prominent members of this +directory are the SPEC 95 and SPEC 2000 benchmark suites. The <tt>External</tt> +directory does not contain these actual tests, but only the Makefiles that know +how to properly compile these programs from somewhere else. The presence and +location of these external programs is configured by the test-suite +<tt>configure</tt> script.</p></li> +</ul> + +<p>Each tree is then subdivided into several categories, including applications, +benchmarks, regression tests, code that is strange grammatically, etc. These +organizations should be relatively self explanatory.</p> + +<p>Some tests are known to fail. Some are bugs that we have not fixed yet; +others are features that we haven't added yet (or may never add). In the +regression tests, the result for such tests will be XFAIL (eXpected FAILure). +In this way, you can tell the difference between an expected and unexpected +failure.</p> + +<p>The tests in the test suite have no such feature at this time. If the +test passes, only warnings and other miscellaneous output will be generated. If +a test fails, a large <program> FAILED message will be displayed. This +will help you separate benign warnings from actual test failures.</p> + +</div> + +<!--=========================================================================--> +<h2><a name="testsuiterun">Running the test suite</a></h2> +<!--=========================================================================--> + +<div> + +<p>First, all tests are executed within the LLVM object directory tree. They +<i>are not</i> executed inside of the LLVM source tree. This is because the +test suite creates temporary files during execution.</p> + +<p>To run the test suite, you need to use the following steps:</p> + +<ol> + <li><tt>cd</tt> into the <tt>llvm/projects</tt> directory in your source tree. + </li> + + <li><p>Check out the <tt>test-suite</tt> module with:</p> + +<div class="doc_code"> +<pre> +% svn co http://llvm.org/svn/llvm-project/test-suite/trunk test-suite +</pre> +</div> + <p>This will get the test suite into <tt>llvm/projects/test-suite</tt>.</p> + </li> + <li><p>Configure and build <tt>llvm</tt>.</p></li> + <li><p>Configure and build <tt>llvm-gcc</tt>.</p></li> + <li><p>Install <tt>llvm-gcc</tt> somewhere.</p></li> + <li><p><em>Re-configure</em> <tt>llvm</tt> from the top level of + each build tree (LLVM object directory tree) in which you want + to run the test suite, just as you do before building LLVM.</p> + <p>During the <em>re-configuration</em>, you must either: (1) + have <tt>llvm-gcc</tt> you just built in your path, or (2) + specify the directory where your just-built <tt>llvm-gcc</tt> is + installed using <tt>--with-llvmgccdir=$LLVM_GCC_DIR</tt>.</p> + <p>You must also tell the configure machinery that the test suite + is available so it can be configured for your build tree:</p> +<div class="doc_code"> +<pre> +% cd $LLVM_OBJ_ROOT ; $LLVM_SRC_ROOT/configure [--with-llvmgccdir=$LLVM_GCC_DIR] +</pre> +</div> + <p>[Remember that <tt>$LLVM_GCC_DIR</tt> is the directory where you + <em>installed</em> llvm-gcc, not its src or obj directory.]</p> + </li> + + <li><p>You can now run the test suite from your build tree as follows:</p> +<div class="doc_code"> +<pre> +% cd $LLVM_OBJ_ROOT/projects/test-suite +% make +</pre> +</div> + </li> +</ol> +<p>Note that the second and third steps only need to be done once. After you +have the suite checked out and configured, you don't need to do it again (unless +the test code or configure script changes).</p> + +<!-- _______________________________________________________________________ --> +<h3> + <a name="testsuiteexternal">Configuring External Tests</a> +</h3> +<!-- _______________________________________________________________________ --> + +<div> +<p>In order to run the External tests in the <tt>test-suite</tt> + module, you must specify <i>--with-externals</i>. This + must be done during the <em>re-configuration</em> step (see above), + and the <tt>llvm</tt> re-configuration must recognize the + previously-built <tt>llvm-gcc</tt>. If any of these is missing or + neglected, the External tests won't work.</p> +<dl> +<dt><i>--with-externals</i></dt> +<dt><i>--with-externals=<<tt>directory</tt>></i></dt> +</dl> + This tells LLVM where to find any external tests. They are expected to be + in specifically named subdirectories of <<tt>directory</tt>>. + If <tt>directory</tt> is left unspecified, + <tt>configure</tt> uses the default value + <tt>/home/vadve/shared/benchmarks/speccpu2000/benchspec</tt>. + Subdirectory names known to LLVM include: + <dl> + <dt>spec95</dt> + <dt>speccpu2000</dt> + <dt>speccpu2006</dt> + <dt>povray31</dt> + </dl> + Others are added from time to time, and can be determined from + <tt>configure</tt>. +</div> + +<!-- _______________________________________________________________________ --> +<h3> + <a name="testsuitetests">Running different tests</a> +</h3> +<!-- _______________________________________________________________________ --> +<div> +<p>In addition to the regular "whole program" tests, the <tt>test-suite</tt> +module also provides a mechanism for compiling the programs in different ways. +If the variable TEST is defined on the <tt>gmake</tt> command line, the test system will +include a Makefile named <tt>TEST.<value of TEST variable>.Makefile</tt>. +This Makefile can modify build rules to yield different results.</p> + +<p>For example, the LLVM nightly tester uses <tt>TEST.nightly.Makefile</tt> to +create the nightly test reports. To run the nightly tests, run <tt>gmake +TEST=nightly</tt>.</p> + +<p>There are several TEST Makefiles available in the tree. Some of them are +designed for internal LLVM research and will not work outside of the LLVM +research group. They may still be valuable, however, as a guide to writing your +own TEST Makefile for any optimization or analysis passes that you develop with +LLVM.</p> + +</div> + +<!-- _______________________________________________________________________ --> +<h3> + <a name="testsuiteoutput">Generating test output</a> +</h3> +<!-- _______________________________________________________________________ --> +<div> + <p>There are a number of ways to run the tests and generate output. The most + simple one is simply running <tt>gmake</tt> with no arguments. This will + compile and run all programs in the tree using a number of different methods + and compare results. Any failures are reported in the output, but are likely + drowned in the other output. Passes are not reported explicitely.</p> + + <p>Somewhat better is running <tt>gmake TEST=sometest test</tt>, which runs + the specified test and usually adds per-program summaries to the output + (depending on which sometest you use). For example, the <tt>nightly</tt> test + explicitely outputs TEST-PASS or TEST-FAIL for every test after each program. + Though these lines are still drowned in the output, it's easy to grep the + output logs in the Output directories.</p> + + <p>Even better are the <tt>report</tt> and <tt>report.format</tt> targets + (where <tt>format</tt> is one of <tt>html</tt>, <tt>csv</tt>, <tt>text</tt> or + <tt>graphs</tt>). The exact contents of the report are dependent on which + <tt>TEST</tt> you are running, but the text results are always shown at the + end of the run and the results are always stored in the + <tt>report.<type>.format</tt> file (when running with + <tt>TEST=<type></tt>). + + The <tt>report</tt> also generate a file called + <tt>report.<type>.raw.out</tt> containing the output of the entire test + run. +</div> + +<!-- _______________________________________________________________________ --> +<h3> + <a name="testsuitecustom">Writing custom tests for the test suite</a> +</h3> +<!-- _______________________________________________________________________ --> + +<div> + +<p>Assuming you can run the test suite, (e.g. "<tt>gmake TEST=nightly report</tt>" +should work), it is really easy to run optimizations or code generator +components against every program in the tree, collecting statistics or running +custom checks for correctness. At base, this is how the nightly tester works, +it's just one example of a general framework.</p> + +<p>Lets say that you have an LLVM optimization pass, and you want to see how +many times it triggers. First thing you should do is add an LLVM +<a href="ProgrammersManual.html#Statistic">statistic</a> to your pass, which +will tally counts of things you care about.</p> + +<p>Following this, you can set up a test and a report that collects these and +formats them for easy viewing. This consists of two files, a +"<tt>test-suite/TEST.XXX.Makefile</tt>" fragment (where XXX is the name of your +test) and a "<tt>test-suite/TEST.XXX.report</tt>" file that indicates how to +format the output into a table. There are many example reports of various +levels of sophistication included with the test suite, and the framework is very +general.</p> + +<p>If you are interested in testing an optimization pass, check out the +"libcalls" test as an example. It can be run like this:<p> + +<div class="doc_code"> +<pre> +% cd llvm/projects/test-suite/MultiSource/Benchmarks # or some other level +% make TEST=libcalls report +</pre> +</div> + +<p>This will do a bunch of stuff, then eventually print a table like this:</p> + +<div class="doc_code"> +<pre> +Name | total | #exit | +... +FreeBench/analyzer/analyzer | 51 | 6 | +FreeBench/fourinarow/fourinarow | 1 | 1 | +FreeBench/neural/neural | 19 | 9 | +FreeBench/pifft/pifft | 5 | 3 | +MallocBench/cfrac/cfrac | 1 | * | +MallocBench/espresso/espresso | 52 | 12 | +MallocBench/gs/gs | 4 | * | +Prolangs-C/TimberWolfMC/timberwolfmc | 302 | * | +Prolangs-C/agrep/agrep | 33 | 12 | +Prolangs-C/allroots/allroots | * | * | +Prolangs-C/assembler/assembler | 47 | * | +Prolangs-C/bison/mybison | 74 | * | +... +</pre> +</div> + +<p>This basically is grepping the -stats output and displaying it in a table. +You can also use the "TEST=libcalls report.html" target to get the table in HTML +form, similarly for report.csv and report.tex.</p> + +<p>The source for this is in test-suite/TEST.libcalls.*. The format is pretty +simple: the Makefile indicates how to run the test (in this case, +"<tt>opt -simplify-libcalls -stats</tt>"), and the report contains one line for +each column of the output. The first value is the header for the column and the +second is the regex to grep the output of the command for. There are lots of +example reports that can do fancy stuff.</p> + +</div> + +</div> + +<!-- *********************************************************************** --> + +<hr> +<address> + <a href="http://jigsaw.w3.org/css-validator/check/referer"><img + src="http://jigsaw.w3.org/css-validator/images/vcss-blue" alt="Valid CSS"></a> + <a href="http://validator.w3.org/check/referer"><img + src="http://www.w3.org/Icons/valid-html401-blue" alt="Valid HTML 4.01"></a> + + John T. Criswell, Daniel Dunbar, Reid Spencer, and Tanya Lattner<br> + <a href="http://llvm.org/">The LLVM Compiler Infrastructure</a><br> + Last modified: $Date$ +</address> +</body> +</html> |