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+
+<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></li>
+<ul>
+ <li><a href="#codefragments">Code Fragments</a></li>
+ <li><a href="#wholeprograms">Whole Programs</a></li>
+</ul>
+<li><a href="#tree">LLVM Test Suite Tree</a></li>
+<li><a href="#qmstructure">QMTest Structure</a></li>
+<li><a href="#progstructure">Programs Structure</a></li>
+<li><a href="#run">Running the LLVM Tests</a></li>
+<p><b>Written by John T. Criswell</b></p>
+</ol>
<!--===============================================================-->
- <h2><a name="overview">Overview</a><hr></h2>
+ <div class="doc_section"><a name="overview">Overview</a></div>
<!--===============================================================-->
- This document is the reference manual for the LLVM test suite. It
+ <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>
<!--===============================================================-->
- <h2><a name="Requirements">Requirements</a><hr></h2>
+ <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 compact>
- <dt><A HREF="http://www.qmtest.com">QMTest</A>
- <dd>
- The LLVM test suite uses QMTest to organize and run tests.
- <p>
-
- <dt><A HREF="http://www.python.org">Python</A>
- <dd>
- You will need a python interpreter that works with QMTest.
- Python will need zlib and SAX support enabled.
- <p>
+ <dt><A HREF="http://www.qmtest.com">QMTest</A></dt>
+ <dd>The LLVM test suite uses QMTest to organize and
+ run tests.</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>
</dl>
+ </div>
<!--===============================================================-->
- <h2><a name="quick">Quick Start</a><hr></h2>
+ <div class="doc_section"><a name="quick">Quick Start</a></div>
<!--===============================================================-->
- To run all of the tests in LLVM, use the Master Makefile in llvm/test:
- <p>
- <tt>
- cd test
- <br>
- make
- </tt>
+ <div class="doc_text">
+ <p>
+ The tests are located in the LLVM source tree under the directory
+ <tt>llvm/test</tt>. To run all of the tests in LLVM, use the Master
+ Makefile in that 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>
+ </p>
- <tt>
- cd test
- <br>
- make qmtest
- </tt>
+ <pre>
+ % gmake -C llvm/test qmtest
+ </pre>
<p>
-
To run only the tests that compile and execute whole programs, run the
Programs tests:
- <p>
+ </p>
- <tt>
- cd test/Programs
- <br>
- make
- </tt>
- <p>
+ <pre>
+ % gmake -C llvm/test/Programs
+ </pre>
+ </div>
<!--===============================================================-->
- <h2><a name="org">LLVM Test Suite Organization</a><hr></h2>
+ <div class="doc_section"><h2><a name="org">LLVM Test Suite
+ Organization </a></h2></div>
<!--===============================================================-->
- The LLVM test suite contains two major types of tests:
- <ul>
- <li>Code Fragments<br>
+ <div class="doc_text">
+ <p>The LLVM test suite contains two major categories of tests: code
+ fragments and whole programs.</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>
- Code fragments are not complete programs, and they are never executed
- to determine correct behavior.
- <p>
- The tests in the llvm/test/Features and llvm/test/Regression directories
- contain code fragments.
-
- <li>Whole Programs<br>
- 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>
- 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>
- 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.
-
+ 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>
+ The tests in the Features and
+ Regression directories contain code fragments.
+ </p>
+ </div>
+
+ <div class="doc_subsection"><a name="wholeprograms">Whole Programs</a>
+ </div>
+
+ <div class="doc_text">
<p>
- The test/Programs directory contains all tests which compile and
+ 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>
+ The Programs directory contains all tests which compile and
benchmark whole programs.
- </ul>
+ </p>
+ </div>
<!--===============================================================-->
- <h2><a name="tree">LLVM Test Suite Tree</a><hr></h2>
+ <div class="doc_section"><h2><a name="tree">LLVM Test Suite Tree</a>
+ </div>
<!--===============================================================-->
- The LLVM test suite is broken up into the following directory
- hierarchy:
-
+ <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> Features<br>
- This directory contains sample codes that test various features
+ <li>Features
+ <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>
+ </p>
- <li>Regression<br>
+ <li>Regression
+ <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>
+ </p>
- <li>Programs<br>
- The Programs directory contains programs that can be compiled
+ <li>Programs
+ <p>
+ The Programs directory 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><p>
In addition for testing correctness, the Programs 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><p>
The Programs directory is subdivided into several smaller
subdirectories:
+ </p>
+
<ul>
- <li>SingleSource<br>
+ <li>Programs/SingleSource
+ <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>MultiSource<br>
- The MultiSource directory contains subdirectories which contain
- entire programs with multiple source files. Large benchmarks and
- whole applications go here.
- <p>
-
- <li>External<br>
+ calculate a particular value. Several such programs are
+ grouped together in each directory.
+ </p>
+
+ <li>Programs/MultiSource
+ <p>
+ The MultiSource directory contains subdirectories which
+ contain entire programs with multiple source files.
+ Large benchmarks and whole applications go here.
+ </p>
+
+ <li>Programs/External
+ <p>
The External directory contains Makefiles for building
code that is external to (i.e. not distributed with)
LLVM. The most prominent member of this directory is
- the SPEC 2000 benchmark suite. The presence and location
- of these external programs is configured by the LLVM
- <tt>configure</tt> script.
+ the SPEC 2000 benchmark suite. The presence and
+ location of these external programs is configured by the
+ LLVM <tt>configure</tt> script.
+ </p>
</ul>
<p>
- <li>QMTest<br>
- 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.
+ <li>QMTest
+ <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>
</ul>
+ </div>
<!--===============================================================-->
- <h2><a name="qmstructure">QMTest Structure</a><hr></h2>
+ <div class="doc_section"><h2><a name="qmstructure">QMTest Structure</a>
+ </div>
<!--===============================================================-->
- The LLVM test suite is partially driven by QMTest and partially
+ <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 Programs directory is currently
driven by a set of Makefiles.
- <p>
-
+ </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>
-
- The LLVM database class makes the directory tree underneath llvm/test a
+ </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>
-
- Hence, the QMTest namespace is essentially what you see in
- llvm/test/Feature and llvm/test/Regression, but there is some magic that
+ </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><p>
The QMTest namespace is currently composed of the following tests and
test suites:
+ </p>
<ul>
- <li>Feature<br>
- These are the feature tests found in llvm/test/Feature. They are broken
- up into the following categories:
+ <li>Feature
+ <p>
+ These are the feature tests found in the Feature directory.
+ They are broken up into the following categories:
+ </p>
<ul>
- <li>fad<br>
- 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.
+ <li>ad
<p>
-
- <li>fasm<br>
- Assembler tests. These tests verify that the code can be translated
- into native assembly code.
+ 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>opt
<p>
-
- <li>fopt<br>
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>
+ </p>
- <li>fmc<br>
- Machine code tests. These tests verify that the LLVM assembly
- language file can be translated into native assembly code.
+ <li>mc
<p>
+ Machine code tests. These tests verify that the LLVM
+ assembly language file can be translated into native
+ assembly code.
+ </p>
- <li>fcc<br>
- C code tests. These tests verify that the specified LLVM assembly
- code can be converted into C source code using the C backend.
+ <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>
</ul>
<p>
-
- The LLVM database class looks at every file in llvm/test/Feature and
- creates a fake test hierarchy containing
- Feature.<testtype>.<testname>.
- So, if you add an LLVM assembly language file to llvm/test/Feature, it
- actually creates 5 news test: assembler/disassembler, assembler,
+ 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.
-
- <li>Regression<br>
- These are the regression tests. There is one suite for each directory
- in llvm/test/Regression.
- <p>
-
- If you add a new directory to llvm/test/Regression, you will need to
- modify llvm/test/QMTest/llvmdb.py so that it knows what sorts of tests
- are in it and how to run them.
+ </p>
+
+ <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>
</ul>
+ </div>
<!--===============================================================-->
- <h2><a name="progstructure">Programs Structure</a><hr></h2>
+ <div class="doc_section"><h2><a name="progstructure">Programs
+ Structure</a></div>
<!--===============================================================-->
- As mentioned previously, the Programs tree in llvm/test 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>
- In addition to the regular Programs tests, the Programs tree 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 TEST.<value of TEST variable>.Makefile. This Makefile can modify
- build rules that yield different results.
- <p>
- For example, the LLVM nightly tester uses TEST.nightly.Makefile to create the
- nightly test reports. To run the nightly tests, run <tt>gmake
- TEST=nightly</tt>.
- <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.
+
+ <div class="doc_text">
+ <p>
+ As mentioned previously, the Programs tree in llvm/test 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 Programs tests, the Programs tree 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>
<!--===============================================================-->
- <h2><a name="run">Running the LLVM Tests</a><hr></h2>
+ <div class="doc_section"><h2><a name="run">Running the LLVM Tests</a>
+ </div>
<!--===============================================================-->
- 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>
-
+ <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 both the
QMTest driven tests and the Programs tests. By default, it will run
all of the tests.
- <p>
- To run only the QMTest driven tests, run <tt>make qmtest</tt> at the
- command line in llvm/tests. To run a specific qmtest, suffix the test name
- with ".t" when running make.
- <p>
+ </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>make Regression.LLC.t</tt> in llvm/tests.
- <p>
+ <tt>gmake Regression.LLC.t</tt> in llvm/tests.
+ </p><p>
Note that the Makefiles in llvm/test/Features and llvm/test/Regression
- are gone. You must now use QMTest from the llvm/test directory to run them.
- <p>
-
- To run the Programs test, cd into the llvm/test/Programs directory
- and type <tt>make</tt>. Alternatively, you can type <tt>make
+ are gone. You must now use QMTest from the llvm/test directory to run
+ them.
+ </p><p>
+ To run the Programs test, cd into the llvm/test/Programs directory and
+ type <tt>gmake</tt>. Alternatively, you can type <tt>gmake
TEST=<type> test</tt> to run one of the specialized tests in
- llvm/test/Programs/TEST.<type>.Makefile. For example, you could run
- the nightly tester tests using the following commands:
- <p>
- <tt>
- cd llvm/test/Programs
- <br>
- make TEST=nightly test
- </tt>
+ llvm/test/Programs/TEST.<type>.Makefile. For example, you could
+ run the nightly tester tests using the following commands:
+ </p>
+
+ <pre>
+ % cd llvm/test/Programs
+ % 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>
+ 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>
- The Programs tests 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.
-
- <hr>
-
- </body>
+ 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 Programs tests 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>
+
+<!-- *********************************************************************** -->
+
+<hr><font size="-1">
+<address>John T. Criswell</address>
+<a href="http://llvm.cs.uiuc.edu">The LLVM Compiler Infrastructure</a>
+<br>
+Last modified: $Date$
+</font>
+
+</body>
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