mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-30 16:17:05 +00:00
820e247162
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17397 91177308-0d34-0410-b5e6-96231b3b80d8
507 lines
20 KiB
HTML
507 lines
20 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
|
|
"http://www.w3.org/TR/html4/strict.dtd">
|
|
<html>
|
|
<head>
|
|
<title>LLVM Test Suite Guide</title>
|
|
<link rel="stylesheet" href="llvm.css" type="text/css">
|
|
</head>
|
|
<body>
|
|
|
|
<div class="doc_title">
|
|
LLVM Test Suite Guide
|
|
</div>
|
|
|
|
<ol>
|
|
<li><a href="#overview">Overview</a></li>
|
|
<li><a href="#Requirements">Requirements</a></li>
|
|
<li><a href="#quick">Quick Start</a></li>
|
|
<li><a href="#org">LLVM Test Suite Organization</a>
|
|
<ul>
|
|
<li><a href="#codefragments">Code Fragments</a></li>
|
|
<li><a href="#wholeprograms">Whole Programs</a></li>
|
|
</ul>
|
|
</li>
|
|
<li><a href="#tree">LLVM Test Suite Tree</a></li>
|
|
<li><a href="#qmstructure">QMTest Structure</a></li>
|
|
<li><a href="#progstructure"><tt>llvm-test</tt> Structure</a></li>
|
|
<li><a href="#run">Running the LLVM Tests</a></li>
|
|
<li><a href="#nightly">Running the nightly tester</a></li>
|
|
</ol>
|
|
|
|
<div class="doc_author">
|
|
<p>Written by John T. Criswell and <a
|
|
href="http://llvm.x10sys.com/rspencer">Reid Spencer</a></p>
|
|
</div>
|
|
|
|
<!--=========================================================================-->
|
|
<div class="doc_section"><a name="overview">Overview</a></div>
|
|
<!--=========================================================================-->
|
|
|
|
<div class="doc_text">
|
|
|
|
<p>This document is the reference manual for the LLVM test suite. It documents
|
|
the structure of the LLVM test suite, the tools needed to use it, and how to add
|
|
and run tests.</p>
|
|
|
|
</div>
|
|
|
|
<!--=========================================================================-->
|
|
<div class="doc_section"><a name="Requirements">Requirements</a></div>
|
|
<!--=========================================================================-->
|
|
|
|
<div class="doc_text">
|
|
|
|
<p>In order to use the LLVM test suite, you will need all of the software
|
|
required to build LLVM, plus the following:</p>
|
|
|
|
<dl>
|
|
<dt><a href="http://www.qmtest.com">QMTest</a></dt>
|
|
<dd>The LLVM test suite uses QMTest to organize and run tests. <b>Note:
|
|
you will need <a href="http://llvm.cs.uiuc.edu/qm-2.0.3.tar.gz">QMTest
|
|
2.0.3 (source tar.gz file)</a> to be successful. The tests do not run with
|
|
any other version.</b></dd>
|
|
|
|
<dt><a href="http://www.python.org">Python</a></dt>
|
|
<dd>You will need a Python interpreter that works with QMTest. Python will
|
|
need zlib and SAX support enabled.</dd>
|
|
|
|
<dt><a href="http://www.netlib.org/f2c">F2C</a></dt>
|
|
<dd>For now, LLVM does not have a Fortran front-end, but using F2C, we can run
|
|
Fortran benchmarks. F2C support must be enabled via <tt>configure</tt> if not
|
|
installed in a standard place. F2C requires three items: the <tt>f2c</tt>
|
|
executable, <tt>f2c.h</tt> to compile the generated code, and <tt>libf2c.a</tt>
|
|
to link generated code. By default, given an F2C directory <tt>$DIR</tt>, the
|
|
configure script will search <tt>$DIR/bin</tt> for <tt>f2c</tt>,
|
|
<tt>$DIR/include</tt> for <tt>f2c.h</tt>, and <tt>$DIR/lib</tt> for
|
|
<tt>libf2c.a</tt>. The default <tt>$DIR</tt> values are: <tt>/usr</tt>,
|
|
<tt>/usr/local</tt>, <tt>/sw</tt>, and <tt>/opt</tt>. If you installed F2C in a
|
|
different location, you must tell <tt>configure</tt>:
|
|
|
|
<ul>
|
|
<li><tt>./configure --with-f2c=$DIR</tt><br>
|
|
This will specify a new <tt>$DIR</tt> for the above-described search
|
|
process. This will only work if the binary, header, and library are in their
|
|
respective subdirectories of <tt>$DIR</tt>.</li>
|
|
|
|
<li><tt>./configure --with-f2c-bin=/binary/path --with-f2c-inc=/include/path
|
|
--with-f2c-lib=/lib/path</tt><br>
|
|
This allows you to specify the F2C components separately. Note: if you choose
|
|
this route, you MUST specify all three components, and you need to only specify
|
|
<em>directories</em> where the files are located; do NOT include the
|
|
filenames themselves on the <tt>configure</tt> line.</li>
|
|
</ul></dd>
|
|
</dl>
|
|
</div>
|
|
|
|
<!--=========================================================================-->
|
|
<div class="doc_section"><a name="quick">Quick Start</a></div>
|
|
<!--=========================================================================-->
|
|
|
|
<div class="doc_text">
|
|
|
|
<p>The tests are located in two separate CVS modules. The basic feature and
|
|
regression tests are in the main "llvm" module under the directory
|
|
<tt>llvm/test</tt>. A more comprehensive test suite that includes whole
|
|
programs in C and C++ is in the <tt>llvm-test</tt> module. This module should
|
|
be checked out to the <tt>llvm/projects</tt> directory. When you
|
|
<tt>configure</tt> the <tt>llvm</tt> module, the <tt>llvm-test</tt> module
|
|
will be automatically configured. Or you can do it manually.</p>
|
|
<p>To run all of the simple tests in LLVM, use the master Makefile in the
|
|
<tt>llvm/test</tt> directory:</p>
|
|
<pre>
|
|
% gmake -C llvm/test
|
|
</pre>
|
|
|
|
<p>To run only the code fragment tests (i.e. those that do basic testing of
|
|
LLVM), run the tests organized by QMTest:</p>
|
|
<pre>
|
|
% gmake -C llvm/test qmtest
|
|
</pre>
|
|
|
|
<p>To run only the basic feature tests, QMTest supports the following
|
|
target:</p>
|
|
<pre>
|
|
% gmake -C llvm/test Feature.t
|
|
</pre>
|
|
|
|
<p>To run only the regression tests, QMTest supports the following
|
|
target:</p>
|
|
<pre>
|
|
% gmake -C llvm/test Regression.t
|
|
</pre>
|
|
|
|
<p>To run the comprehensive test suite (tests that compile and execute whole
|
|
programs), run the <tt>llvm-test</tt> tests:</p>
|
|
|
|
<pre>
|
|
% cd llvm/projects
|
|
% cvs co llvm-test
|
|
% cd llvm-test
|
|
% ./configure --with-llvmsrc=$LLVM_SRC_ROOT --with-llvmobj=$LLVM_OBJ_ROOT
|
|
% gmake
|
|
</pre>
|
|
|
|
</div>
|
|
|
|
<!--=========================================================================-->
|
|
<div class="doc_section"><a name="org">LLVM Test Suite Organization</a></div>
|
|
<!--=========================================================================-->
|
|
|
|
<div class="doc_text">
|
|
|
|
<p>The LLVM test suite contains two major categories of tests: code
|
|
fragments and whole programs. Code fragments are in the <tt>llvm</tt> module
|
|
under the directory under the <tt>llvm/test</tt> directory. The whole programs
|
|
test suite are n the <tt>llvm-test</tt> module under the main directory.</p>
|
|
|
|
</div>
|
|
|
|
<div class="doc_subsection"><a name="codefragments">Code Fragments</a>
|
|
</div>
|
|
|
|
<div class="doc_text">
|
|
|
|
<p>Code fragments are small pieces of code that test a specific feature of LLVM
|
|
or trigger a specific bug in LLVM. They are usually written in LLVM assembly
|
|
language, but can be written in other languages if the test targets a particular
|
|
language front end.</p>
|
|
|
|
<p>Code fragments are not complete programs, and they are never executed to
|
|
determine correct behavior.</p>
|
|
|
|
<p>Thes code fragment tests are located in the <tt>llvm/test/Features</tt> and
|
|
<tt>llvm/test/Regression</tt> directories.</p>
|
|
|
|
</div>
|
|
|
|
<div class="doc_subsection"><a name="wholeprograms">Whole Programs</a></div>
|
|
|
|
<div class="doc_text">
|
|
|
|
<p>Whole Programs are pieces of code which can be compiled and linked into a
|
|
stand-alone program that can be executed. These programs are generally written
|
|
in high level languages such as C or C++, but sometimes they are written
|
|
straight in LLVM assembly.</p>
|
|
|
|
<p>These programs are compiled and then executed using several different
|
|
methods (native compiler, LLVM C backend, LLVM JIT, LLVM native code generation,
|
|
etc). The output of these programs is compared to ensure that LLVM is compiling
|
|
the program correctly.</p>
|
|
|
|
<p>In addition to compiling and executing programs, whole program tests serve as
|
|
a way of benchmarking LLVM performance, both in terms of the efficiency of the
|
|
programs generated as well as the speed with which LLVM compiles, optimizes, and
|
|
generates code.</p>
|
|
|
|
<p>All "whole program" tests are located in the <tt>llvm-test</tt> CVS
|
|
module.</p>
|
|
|
|
</div>
|
|
|
|
<!--=========================================================================-->
|
|
<div class="doc_section"><a name="tree">LLVM Test Suite Tree</a></div>
|
|
<!--=========================================================================-->
|
|
|
|
<div class="doc_text">
|
|
|
|
<p>Each type of test in the LLVM test suite has its own directory. The major
|
|
subtrees of the test suite directory tree are as follows:</p>
|
|
|
|
<ul>
|
|
<li><tt>llvm/test/Features</tt>
|
|
<p>This directory contains sample codes that test various features of the
|
|
LLVM language. These pieces of sample code are run through various
|
|
assembler, disassembler, and optimizer passes.</p>
|
|
</li>
|
|
|
|
<li><tt>llvm/test/Regression</tt>
|
|
<p>This directory contains regression tests for LLVM. When a bug is found
|
|
in LLVM, a regression test containing just enough code to reproduce the
|
|
problem should be written and placed somewhere underneath this directory.
|
|
In most cases, this will be a small piece of LLVM assembly language code,
|
|
often distilled from an actual application or benchmark.</p>
|
|
</li>
|
|
|
|
<li><tt>llvm-test</tt>
|
|
<p>The <tt>llvm-test</tt> CVS module contains 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>In addition for testing correctness, the <tt>llvm-test</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></li>
|
|
|
|
<li><tt>llvm-test/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>llvm-test/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>llvm-test/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 presence and
|
|
location of these external programs is configured by the llvm-test
|
|
<tt>configure</tt> script.</p></li>
|
|
|
|
<li><tt>llvm/test/QMTest</tt>
|
|
<p>This directory contains the QMTest information files. Inside this directory
|
|
are QMTest administration files and the Python code that implements the LLVM
|
|
test and database classes.</p></li>
|
|
|
|
</ul>
|
|
|
|
</div>
|
|
|
|
<!--=========================================================================-->
|
|
<div class="doc_section"><a name="qmstructure">QMTest Structure</a></div>
|
|
<!--=========================================================================-->
|
|
|
|
<div class="doc_text">
|
|
|
|
<p>The LLVM test suite is partially driven by QMTest and partially driven by GNU
|
|
Make. Specifically, the Features and Regression tests are all driven by QMTest.
|
|
The <tt>llvm-test</tt> module is currently driven by a set of Makefiles.</p>
|
|
|
|
<p>The QMTest system needs to have several pieces of information available;
|
|
these pieces of configuration information are known collectively as the
|
|
"context" in QMTest parlance. Since the context for LLVM is relatively large,
|
|
the master Makefile in llvm/test sets it for you.</p>
|
|
|
|
<p>The LLVM database class makes the subdirectories of llvm/test a QMTest test
|
|
database. For each directory that contains tests driven by QMTest, it knows
|
|
what type of test the source file is and how to run it.</p>
|
|
|
|
<p>Hence, the QMTest namespace is essentially what you see in the Feature and
|
|
Regression directories, but there is some magic that the database class performs
|
|
(as described below).</p>
|
|
|
|
<p>The QMTest namespace is currently composed of the following tests and test
|
|
suites:</p>
|
|
|
|
<ul>
|
|
<li>Feature
|
|
|
|
<p>These are the feature tests found in the Feature directory.
|
|
They are broken up into the following categories:</p>
|
|
|
|
<ul>
|
|
<li>ad
|
|
<p>Assembler/Disassembler tests. These tests verify that a piece of LLVM
|
|
assembly language can be assembled into bytecode and then disassembled
|
|
into the original assembly language code. It does this several times to
|
|
ensure that assembled output can be disassembled and disassembler output
|
|
can be assembled. It also verifies that the give assembly language file
|
|
can be assembled correctly.</p></li>
|
|
|
|
<li>opt
|
|
<p>Optimizer tests. These tests verify that two of the optimizer passes
|
|
completely optimize a program (i.e. after a single pass, they cannot
|
|
optimize a program any further).</p></li>
|
|
|
|
<li>mc
|
|
<p> Machine code tests. These tests verify that the LLVM assembly
|
|
language file can be translated into native assembly code.</p></li>
|
|
|
|
<li>cc
|
|
<p>C code tests. These tests verify that the specified LLVM assembly
|
|
code can be converted into C source code using the C backend.</p></li>
|
|
</ul>
|
|
|
|
<p>The LLVM database class looks at every file in the Feature directory and
|
|
creates a fake test hierarchy containing
|
|
<tt>Feature.<testtype>.<testname></tt>. So, if you add an LLVM
|
|
assembly language file to the Feature directory, it actually creates 5 new
|
|
tests: assembler/disassembler, assembler, optimizer, machine code, and C code.
|
|
</p></li>
|
|
|
|
<li>Regression
|
|
<p>These are the regression tests. There is one suite for each
|
|
subdirectory of the Regression directory. If you add a new subdirectory
|
|
there, you will need to modify, at least, the <tt>RegressionMap</tt>
|
|
variable in <tt>QMTest/llvmdb.py</tt> so that QMTest knows how to run the
|
|
tests in the new subdirectory.</p>
|
|
</li>
|
|
|
|
</ul>
|
|
|
|
</div>
|
|
|
|
<!--=========================================================================-->
|
|
<div class="doc_section"><a name="progstructure"><tt>llvm-test</tt>
|
|
Structure</a></div>
|
|
<!--=========================================================================-->
|
|
|
|
<div class="doc_text">
|
|
|
|
<p>As mentioned previously, the <tt>llvm-test</tt> module provides three types
|
|
of tests: MultiSource, SingleSource, and External. 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>In addition to the regular "whole program" tests, the <tt>llvm-test</tt>
|
|
module also provides a mechanism for compiling the programs in different ways.
|
|
If the variable TEST is defined on the gmake 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>
|
|
|
|
<!--=========================================================================-->
|
|
<div class="doc_section"><a name="run">Running the LLVM Tests</a></div>
|
|
<!--=========================================================================-->
|
|
|
|
<div class="doc_text">
|
|
|
|
<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>The master Makefile in llvm/test is capable of running only the QMTest driven
|
|
tests. By default, it will run all of these tests.</p>
|
|
|
|
<p>To run only the QMTest driven tests, run <tt>gmake qmtest</tt> at the
|
|
command line in llvm/tests. To run a specific qmtest, suffix the test name with
|
|
".t" when running gmake.</p>
|
|
|
|
<p>For example, to run the Regression.LLC tests, type
|
|
<tt>gmake Regression.LLC.t</tt> in <tt>llvm/tests</tt>.</p>
|
|
|
|
<p>Note that there are no Makefiles in <tt>llvm/test/Features</tt> and
|
|
<tt>llvm/test/Regression</tt>. You must use QMTest from the <tt>llvm/test</tt>
|
|
directory to run them.</p>
|
|
|
|
<p>To run the <tt>llvm-test</tt> suite, you need to use the following steps:
|
|
</p>
|
|
<ol>
|
|
<li>cd into the llvm/projects directory</li>
|
|
<li>check out the <tt>llvm-test</tt> module with:<br/>
|
|
<tt>cvs -d :pserver:anon@llvm.cs.uiuc.edu:/var/cvs/llvm co -PR llvm-test</tt><br>
|
|
This will get the test suite into <tt>llvm/projects/llvm-test</tt></li>
|
|
<li>configure the test suite. You can do this one of two ways:
|
|
<ol>
|
|
<li>Use the regular llvm configure:<br/>
|
|
<tt>cd $LLVM_OBJ_ROOT ; $LLVM_SRC_ROOT/configure</tt><br/>
|
|
This will ensure that the <tt>projects/llvm-test</tt> directory is also
|
|
properly configured.</li>
|
|
<li>Use the <tt>configure</tt> script found in the <tt>llvm-test</tt> source
|
|
directory:<br/>
|
|
<tt>$BUILD_SRC_DIR/configure --with-llvmsrc=$LLVM_SRC_ROOT --with-llvmobj=$LLVM_OBJ_ROOT</tt>
|
|
</li>
|
|
</ol>
|
|
<li>gmake</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>
|
|
|
|
<p>To make a specialized test (use one of the
|
|
<tt>llvm-test/TEST.<type>.Makefile</tt>s), just run:<br/>
|
|
<tt>gmake TEST=<type> test</tt><br/>For example, you could run the
|
|
nightly tester tests using the following commands:</p>
|
|
|
|
<pre>
|
|
% cd llvm/projects/llvm-test
|
|
% gmake TEST=nightly test
|
|
</pre>
|
|
|
|
<p>Regardless of which test you're running, the results are printed on standard
|
|
output and standard error. You can redirect these results to a file if you
|
|
choose.</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 QMTest,
|
|
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 <tt>llvm-test</tt> have no such feature as of 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>
|
|
|
|
<!--=========================================================================-->
|
|
<div class="doc_section"><a name="nightly">Running the nightly tester</a></div>
|
|
<!--=========================================================================-->
|
|
|
|
<div class="doc_text">
|
|
|
|
<p>
|
|
The <a href="http://llvm.cs.uiuc.edu/testresults/">LLVM Nightly Testers</a>
|
|
automatically check out an LLVM tree, build it, run the "nightly"
|
|
program test (described above), run all of the feature and regression tests,
|
|
and then delete the checked out tree. This tester is designed to ensure that
|
|
programs don't break as well as keep track of LLVM's progress over time.</p>
|
|
|
|
<p>
|
|
If you'd like to set up an instance of the nightly tester to run on your
|
|
machine, take a look at the comments at the top of the utils/NightlyTester.pl
|
|
file. We usually run it from a crontab entry that looks ilke this:
|
|
</p>
|
|
|
|
<pre>
|
|
5 3 * * * LLVM_LIB_SEARCH_PATH=.../llvm-gcc/bytecode-libs $HOME/llvm/utils/NightlyTest.pl -parallel -enable-linscan ...CVSREPOSTRING... $HOME/buildtest-X86 $HOME/cvs/testresults-X86
|
|
</pre>
|
|
|
|
<p>Or, you can create a shell script to encapsulate the running of the script.
|
|
The optimized x86 Linux nightly test is run from just such a script:
|
|
<pre>
|
|
#!/bin/bash
|
|
BASE=/proj/work/llvm/nightlytest
|
|
export CVSROOT=:pserver:anon@llvm.cs.uiuc.edu:/var/cvs/llvm
|
|
export BUILDDIR=$BASE/build
|
|
export WEBDIR=$BASE/testresults
|
|
export LLVMGCCDIR=/proj/work/llvm/cfrontend/install
|
|
export PATH=/proj/install/bin:$LLVMGCCDIR/bin:$PATH
|
|
export LD_LIBRARY_PATH=/proj/install/lib
|
|
export LLVM_LIB_SEARCH_PATH=/proj/work/llvm/cfrontend/install/bytecode-libs
|
|
cd $BASE
|
|
cp /proj/work/llvm/llvm/utils/NightlyTest.pl .
|
|
nice ./NightlyTest.pl -nice -release -verbose -parallel -enable-linscan -noexternals
|
|
</pre>
|
|
|
|
<p>
|
|
Take a look at the NightlyTest.pl file to see what all of the flags and
|
|
strings do. If you start running the nightly tests, please let us know and
|
|
we'll link your page to the global tester page. Thanks!
|
|
</p>
|
|
|
|
</div>
|
|
|
|
<!-- *********************************************************************** -->
|
|
|
|
<hr>
|
|
<address>
|
|
<a href="http://jigsaw.w3.org/css-validator/check/referer"><img
|
|
src="http://jigsaw.w3.org/css-validator/images/vcss" alt="Valid CSS!"></a>
|
|
<a href="http://validator.w3.org/check/referer"><img
|
|
src="http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01!" /></a>
|
|
|
|
John T. Criswell<br>
|
|
<a href="http://llvm.cs.uiuc.edu">The LLVM Compiler Infrastructure</a><br/>
|
|
Last modified: $Date$
|
|
</address>
|
|
</body>
|
|
</html>
|