mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-23 02:29:18 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161037 91177308-0d34-0410-b5e6-96231b3b80d8
352 lines
15 KiB
HTML
352 lines
15 KiB
HTML
<!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="_static/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 explicitly.</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
|
|
explicitly 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>
|