mirror of
https://github.com/RPCSX/llvm.git
synced 2024-11-25 20:59:51 +00:00
docs/TestingGuide: Minimal update to describe 'lit' based regression testing
instead of DejaGNU. Still a bit kooky, since the current test format still has some strong Tcl roots. Oh well! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110005 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar
parent
1628665065
commit
cd3b117c76
@ -16,22 +16,22 @@
|
||||
<li><a href="#requirements">Requirements</a></li>
|
||||
<li><a href="#org">LLVM testing infrastructure organization</a>
|
||||
<ul>
|
||||
<li><a href="#dejagnu">DejaGNU tests</a></li>
|
||||
<li><a href="#regressiontests">Regression tests</a></li>
|
||||
<li><a href="#testsuite">Test suite</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
<li><a href="#quick">Quick start</a>
|
||||
<ul>
|
||||
<li><a href="#quickdejagnu">DejaGNU tests</a></li>
|
||||
<li><a href="#quickregressiontests">Regression tests</a></li>
|
||||
<li><a href="#quicktestsuite">Test suite</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
<li><a href="#dgstructure">DejaGNU structure</a>
|
||||
<li><a href="#rtstructure">Regression test structure</a>
|
||||
<ul>
|
||||
<li><a href="#dgcustom">Writing new DejaGNU tests</a></li>
|
||||
<li><a href="#rtcustom">Writing new regression tests</a></li>
|
||||
<li><a href="#FileCheck">The FileCheck utility</a></li>
|
||||
<li><a href="#dgvars">Variables and substitutions</a></li>
|
||||
<li><a href="#dgfeatures">Other features</a></li>
|
||||
<li><a href="#rtvars">Variables and substitutions</a></li>
|
||||
<li><a href="#rtfeatures">Other features</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
<li><a href="#testsuitestructure">Test suite structure</a></li>
|
||||
@ -46,8 +46,7 @@
|
||||
</ol>
|
||||
|
||||
<div class="doc_author">
|
||||
<p>Written by John T. Criswell, <a
|
||||
href="http://llvm.x10sys.com/rspencer">Reid Spencer</a>, and Tanya Lattner</p>
|
||||
<p>Written by John T. Criswell, Daniel Dunbar, Reid Spencer, and Tanya Lattner</p>
|
||||
</div>
|
||||
|
||||
<!--=========================================================================-->
|
||||
@ -56,9 +55,9 @@
|
||||
|
||||
<div class="doc_text">
|
||||
|
||||
<p>This document is the reference manual for the LLVM testing infrastructure. It documents
|
||||
the structure of the LLVM testing infrastructure, the tools needed to use it,
|
||||
and how to add and run tests.</p>
|
||||
<p>This document is the reference manual for the LLVM testing infrastructure. It
|
||||
documents the structure of the LLVM testing infrastructure, the tools needed to
|
||||
use it, and how to add and run tests.</p>
|
||||
|
||||
</div>
|
||||
|
||||
@ -68,17 +67,9 @@ and how to add and run tests.</p>
|
||||
|
||||
<div class="doc_text">
|
||||
|
||||
<p>In order to use the LLVM testing infrastructure, you will need all of the software
|
||||
required to build LLVM, plus the following:</p>
|
||||
|
||||
<dl>
|
||||
<dt><a href="http://www.gnu.org/software/dejagnu/">DejaGNU</a></dt>
|
||||
<dd>The Feature and Regressions tests are organized and run by DejaGNU.</dd>
|
||||
<dt><a href="http://expect.nist.gov/">Expect</a></dt>
|
||||
<dd>Expect is required by DejaGNU.</dd>
|
||||
<dt><a href="http://www.tcl.tk/software/tcltk/">tcl</a></dt>
|
||||
<dd>Tcl is required by DejaGNU. </dd>
|
||||
</dl>
|
||||
<p>In order to use the LLVM testing infrastructure, you will need all of the
|
||||
software required to build LLVM, as well
|
||||
as <a href="http://python.org">Python</a> 2.4 or later.</p>
|
||||
|
||||
</div>
|
||||
|
||||
@ -88,29 +79,28 @@ required to build LLVM, plus the following:</p>
|
||||
|
||||
<div class="doc_text">
|
||||
|
||||
<p>The LLVM testing infrastructure contains two major categories of tests: code
|
||||
fragments and whole programs. Code fragments are referred to as the "DejaGNU
|
||||
tests" and are in the <tt>llvm</tt> module in subversion under the
|
||||
<tt>llvm/test</tt> directory. The whole programs tests are referred to as the
|
||||
"Test suite" and are in the <tt>test-suite</tt> module in subversion.
|
||||
<p>The LLVM testing infrastructure contains two major categories of tests:
|
||||
regression tests and whole programs. The regression tests are contained inside
|
||||
the LLVM repository itself under <tt>llvm/test</tt> and are expected to always
|
||||
pass -- they should be run before every commit. The whole programs tests are
|
||||
referred to as the "LLVM test suite" and are in the <tt>test-suite</tt> module
|
||||
in subversion.
|
||||
</p>
|
||||
|
||||
</div>
|
||||
|
||||
<!-- _______________________________________________________________________ -->
|
||||
<div class="doc_subsection"><a name="dejagnu">DejaGNU tests</a></div>
|
||||
<div class="doc_subsection"><a name="regressiontests">Regression tests</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 (and the
|
||||
appropriate <tt>--with-llvmgcc</tt> options were used
|
||||
at <tt>configure</tt> time of the <tt>llvm</tt> module). These tests
|
||||
are driven by the DejaGNU testing framework, which is hidden behind a
|
||||
few simple makefiles.</p>
|
||||
<p>The regression tests 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 (and the appropriate <tt>--with-llvmgcc</tt>
|
||||
options were used at <tt>configure</tt> time of the <tt>llvm</tt> module). These
|
||||
tests are driven by the 'lit' testing tool, which is part of LLVM.</p>
|
||||
|
||||
<p>These code fragments are not complete programs. The code generated
|
||||
from them is never executed to determine correct behavior.</p>
|
||||
@ -157,8 +147,8 @@ generates code.</p>
|
||||
|
||||
<div class="doc_text">
|
||||
|
||||
<p>The tests are located in two separate Subversion modules. The
|
||||
DejaGNU tests are in the main "llvm" module under the directory
|
||||
<p>The tests are located in two separate Subversion modules. The regressions
|
||||
tests are in the main "llvm" module under the directory
|
||||
<tt>llvm/test</tt> (so you get these tests for free with the main llvm tree).
|
||||
The more comprehensive test suite that includes whole
|
||||
programs in C and C++ is in the <tt>test-suite</tt> module. This module should
|
||||
@ -170,10 +160,10 @@ the <tt>test-suite</tt> directory will be automatically configured.
|
||||
Alternatively, you can configure the <tt>test-suite</tt> module manually.</p>
|
||||
|
||||
<!-- _______________________________________________________________________ -->
|
||||
<div class="doc_subsection"><a name="quickdejagnu">DejaGNU tests</a></div>
|
||||
<div class="doc_subsection"><a name="quickregressiontests">Regression tests</a></div>
|
||||
<!-- _______________________________________________________________________ -->
|
||||
<p>To run all of the simple tests in LLVM using DejaGNU, use the master Makefile
|
||||
in the <tt>llvm/test</tt> directory:</p>
|
||||
<p>To run all of the LLVM regression tests, use master Makefile in
|
||||
the <tt>llvm/test</tt> directory:</p>
|
||||
|
||||
<div class="doc_code">
|
||||
<pre>
|
||||
@ -189,26 +179,14 @@ Alternatively, you can configure the <tt>test-suite</tt> module manually.</p>
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>To run only a subdirectory of tests in <tt>llvm/test</tt> using DejaGNU (ie.
|
||||
Transforms), just set the TESTSUITE variable to the path of the
|
||||
subdirectory (relative to <tt>llvm/test</tt>):</p>
|
||||
<p>If you have <a href="http://clang.llvm.org">Clang</a> checked out and built,
|
||||
you can run the LLVM and Clang tests simultaneously using:</p>
|
||||
|
||||
<p>or</p>
|
||||
|
||||
<div class="doc_code">
|
||||
<pre>
|
||||
% gmake TESTSUITE=Transforms check
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p><b>Note: If you are running the tests with <tt>objdir != subdir</tt>, you
|
||||
must have run the complete testsuite before you can specify a
|
||||
subdirectory.</b></p>
|
||||
|
||||
<p>To run only a single test, set <tt>TESTONE</tt> to its path (relative to
|
||||
<tt>llvm/test</tt>) and make the <tt>check-one</tt> target:</p>
|
||||
|
||||
<div class="doc_code">
|
||||
<pre>
|
||||
% gmake TESTONE=Feature/basictest.ll check-one
|
||||
% gmake check-all
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
@ -221,6 +199,27 @@ subdirectory.</b></p>
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>To run individual tests or subsets of tests, you can use the 'llvm-lit'
|
||||
script which is built as part of LLVM. For example, to run the
|
||||
'Integer/BitCast.ll' test by itself you can run:</p>
|
||||
|
||||
<div class="doc_code">
|
||||
<pre>
|
||||
% llvm-lit ~/llvm/test/Integer/BitCast.ll
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>or to run all of the ARM CodeGen tests:</p>
|
||||
|
||||
<div class="doc_code">
|
||||
<pre>
|
||||
% llvm-lit ~/llvm/test/CodeGen/ARM
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>For more information on using the 'lit' tool, see 'llvm-lit --help' or the
|
||||
'lit' man page.</p>
|
||||
|
||||
<!-- _______________________________________________________________________ -->
|
||||
<div class="doc_subsection"><a name="quicktestsuite">Test suite</a></div>
|
||||
<!-- _______________________________________________________________________ -->
|
||||
@ -274,11 +273,11 @@ that subdirectory.</p>
|
||||
</div>
|
||||
|
||||
<!--=========================================================================-->
|
||||
<div class="doc_section"><a name="dgstructure">DejaGNU structure</a></div>
|
||||
<div class="doc_section"><a name="rtstructure">Regression test structure</a></div>
|
||||
<!--=========================================================================-->
|
||||
<div class="doc_text">
|
||||
<p>The LLVM DejaGNU tests are driven by DejaGNU together with GNU Make and are
|
||||
located in the <tt>llvm/test</tt> directory.
|
||||
<p>The LLVM regression tests are driven by 'lit' and are located in
|
||||
the <tt>llvm/test</tt> directory.
|
||||
|
||||
<p>This directory contains a large array of small tests
|
||||
that exercise various features of LLVM and to ensure that regressions do not
|
||||
@ -301,23 +300,24 @@ that subdirectory.</p>
|
||||
</div>
|
||||
|
||||
<!-- _______________________________________________________________________ -->
|
||||
<div class="doc_subsection"><a name="dgcustom">Writing new DejaGNU tests</a></div>
|
||||
<div class="doc_subsection"><a name="rtcustom">Writing new regression tests</a></div>
|
||||
<!-- _______________________________________________________________________ -->
|
||||
<div class="doc_text">
|
||||
<p>The DejaGNU structure is very simple, but does require some information to
|
||||
be set. This information is gathered via <tt>configure</tt> and is written
|
||||
to a file, <tt>site.exp</tt> in <tt>llvm/test</tt>. The <tt>llvm/test</tt>
|
||||
Makefile does this work for you.</p>
|
||||
<p>The regression test structure is very simple, but does require some
|
||||
information to be set. This information is gathered via <tt>configure</tt> and
|
||||
is written to a file, <tt>lit.site.cfg</tt>
|
||||
in <tt>llvm/test</tt>. The <tt>llvm/test</tt> Makefile does this work for
|
||||
you.</p>
|
||||
|
||||
<p>In order for DejaGNU to work, each directory of tests must have a
|
||||
<tt>dg.exp</tt> file. DejaGNU looks for this file to determine how to run the
|
||||
tests. This file is just a Tcl script and it can do anything you want, but
|
||||
we've standardized it for the LLVM regression tests. If you're adding a
|
||||
<p>In order for the regression tests to work, each directory of tests must
|
||||
have a <tt>dg.exp</tt> file. Lit looks for this file to determine how to
|
||||
run the tests. This file is just a Tcl script and it can do anything you want,
|
||||
but we've standardized it for the LLVM regression tests. If you're adding a
|
||||
directory of tests, just copy <tt>dg.exp</tt> from another directory to get
|
||||
running. The standard <tt>dg.exp</tt> simply loads a Tcl
|
||||
library (<tt>test/lib/llvm.exp</tt>) and calls the <tt>llvm_runtests</tt>
|
||||
function defined in that library with a list of file names to run. The names
|
||||
are obtained by using Tcl's glob command. Any directory that contains only
|
||||
running. The standard <tt>dg.exp</tt> simply loads a Tcl library
|
||||
(<tt>test/lib/llvm.exp</tt>) and calls the <tt>llvm_runtests</tt> function
|
||||
defined in that library with a list of file names to run. The names are
|
||||
obtained by using Tcl's glob command. Any directory that contains only
|
||||
directories does not need the <tt>dg.exp</tt> file.</p>
|
||||
|
||||
<p>The <tt>llvm-runtests</tt> function lookas at each file that is passed to
|
||||
@ -378,7 +378,8 @@ that subdirectory.</p>
|
||||
|
||||
<p>There are some quoting rules that you must pay attention to when writing
|
||||
your RUN lines. In general nothing needs to be quoted. Tcl won't strip off any
|
||||
' or " so they will get passed to the invoked program. For example:</p>
|
||||
quote characters so they will get passed to the invoked program. For
|
||||
example:</p>
|
||||
|
||||
<div class="doc_code">
|
||||
<pre>
|
||||
@ -695,7 +696,7 @@ define two separate CHECK lines that match on the same line.
|
||||
</div>
|
||||
|
||||
<!-- _______________________________________________________________________ -->
|
||||
<div class="doc_subsection"><a name="dgvars">Variables and
|
||||
<div class="doc_subsection"><a name="rtvars">Variables and
|
||||
substitutions</a></div>
|
||||
<!-- _______________________________________________________________________ -->
|
||||
<div class="doc_text">
|
||||
@ -791,7 +792,7 @@ substitutions</a></div>
|
||||
</div>
|
||||
|
||||
<!-- _______________________________________________________________________ -->
|
||||
<div class="doc_subsection"><a name="dgfeatures">Other Features</a></div>
|
||||
<div class="doc_subsection"><a name="rtfeatures">Other Features</a></div>
|
||||
<!-- _______________________________________________________________________ -->
|
||||
<div class="doc_text">
|
||||
<p>To make RUN line writing easier, there are several shell scripts located
|
||||
@ -817,7 +818,7 @@ substitutions</a></div>
|
||||
<p>Sometimes it is necessary to mark a test case as "expected fail" or XFAIL.
|
||||
You can easily mark a test as XFAIL just by including <tt>XFAIL: </tt> on a
|
||||
line near the top of the file. This signals that the test case should succeed
|
||||
if the test fails. Such test cases are counted separately by DejaGnu. To
|
||||
if the test fails. Such test cases are counted separately by the testing tool. To
|
||||
specify an expected fail, use the XFAIL keyword in the comments of the test
|
||||
program followed by a colon and one or more regular expressions (separated by
|
||||
a comma). The regular expressions allow you to XFAIL the test conditionally by
|
||||
@ -905,9 +906,10 @@ 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 DejaGNU,
|
||||
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>
|
||||
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
|
||||
@ -1143,7 +1145,7 @@ example reports that can do fancy stuff.</p>
|
||||
<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, Reid Spencer, and Tanya Lattner<br>
|
||||
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>
|
||||
|
||||
Loading…
Reference in New Issue
Block a user