[llvm-commits] [llvm] r159199 - in /llvm/trunk/docs: Bugpoint.html Bugpoint.rst subsystems.rst
Bill Wendling
isanbard at gmail.com
Tue Jun 26 04:37:00 PDT 2012
Author: void
Date: Tue Jun 26 06:37:00 2012
New Revision: 159199
URL: http://llvm.org/viewvc/llvm-project?rev=159199&view=rev
Log:
Sphyinxify the Bugpoint document.
Added:
llvm/trunk/docs/Bugpoint.rst
Removed:
llvm/trunk/docs/Bugpoint.html
Modified:
llvm/trunk/docs/subsystems.rst
Removed: llvm/trunk/docs/Bugpoint.html
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/Bugpoint.html?rev=159198&view=auto
==============================================================================
--- llvm/trunk/docs/Bugpoint.html (original)
+++ llvm/trunk/docs/Bugpoint.html (removed)
@@ -1,316 +0,0 @@
-<!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 bugpoint tool: design and usage</title>
- <link rel="stylesheet" href="_static/llvm.css" type="text/css">
-</head>
-
-<h1>
- LLVM bugpoint tool: design and usage
-</h1>
-
-<ul>
- <li><a href="#desc">Description</a></li>
- <li><a href="#design">Design Philosophy</a>
- <ul>
- <li><a href="#autoselect">Automatic Debugger Selection</a></li>
- <li><a href="#crashdebug">Crash debugger</a></li>
- <li><a href="#codegendebug">Code generator debugger</a></li>
- <li><a href="#miscompilationdebug">Miscompilation debugger</a></li>
- </ul></li>
- <li><a href="#advice">Advice for using <tt>bugpoint</tt></a></li>
- <li><a href="#notEnough">What to do when <tt>bugpoint</tt> isn't enough</a></li>
-</ul>
-
-<div class="doc_author">
-<p>Written by <a href="mailto:sabre at nondot.org">Chris Lattner</a></p>
-</div>
-
-<!-- *********************************************************************** -->
-<h2>
-<a name="desc">Description</a>
-</h2>
-<!-- *********************************************************************** -->
-
-<div>
-
-<p><tt>bugpoint</tt> narrows down the source of problems in LLVM tools and
-passes. It can be used to debug three types of failures: optimizer crashes,
-miscompilations by optimizers, or bad native code generation (including problems
-in the static and JIT compilers). It aims to reduce large test cases to small,
-useful ones. For example, if <tt>opt</tt> crashes while optimizing a
-file, it will identify the optimization (or combination of optimizations) that
-causes the crash, and reduce the file down to a small example which triggers the
-crash.</p>
-
-<p>For detailed case scenarios, such as debugging <tt>opt</tt>, or one of the
-LLVM code generators, see <a href="HowToSubmitABug.html">How To Submit a Bug
-Report document</a>.</p>
-
-</div>
-
-<!-- *********************************************************************** -->
-<h2>
-<a name="design">Design Philosophy</a>
-</h2>
-<!-- *********************************************************************** -->
-
-<div>
-
-<p><tt>bugpoint</tt> is designed to be a useful tool without requiring any
-hooks into the LLVM infrastructure at all. It works with any and all LLVM
-passes and code generators, and does not need to "know" how they work. Because
-of this, it may appear to do stupid things or miss obvious
-simplifications. <tt>bugpoint</tt> is also designed to trade off programmer
-time for computer time in the compiler-debugging process; consequently, it may
-take a long period of (unattended) time to reduce a test case, but we feel it
-is still worth it. Note that <tt>bugpoint</tt> is generally very quick unless
-debugging a miscompilation where each test of the program (which requires
-executing it) takes a long time.</p>
-
-<!-- ======================================================================= -->
-<h3>
- <a name="autoselect">Automatic Debugger Selection</a>
-</h3>
-
-<div>
-
-<p><tt>bugpoint</tt> reads each <tt>.bc</tt> or <tt>.ll</tt> file specified on
-the command line and links them together into a single module, called the test
-program. If any LLVM passes are specified on the command line, it runs these
-passes on the test program. If any of the passes crash, or if they produce
-malformed output (which causes the verifier to abort), <tt>bugpoint</tt> starts
-the <a href="#crashdebug">crash debugger</a>.</p>
-
-<p>Otherwise, if the <tt>-output</tt> option was not specified,
-<tt>bugpoint</tt> runs the test program with the "safe" backend (which is assumed to
-generate good code) to generate a reference output. Once <tt>bugpoint</tt> has
-a reference output for the test program, it tries executing it with the
-selected code generator. If the selected code generator crashes,
-<tt>bugpoint</tt> starts the <a href="#crashdebug">crash debugger</a> on the
-code generator. Otherwise, if the resulting output differs from the reference
-output, it assumes the difference resulted from a code generator failure, and
-starts the <a href="#codegendebug">code generator debugger</a>.</p>
-
-<p>Finally, if the output of the selected code generator matches the reference
-output, <tt>bugpoint</tt> runs the test program after all of the LLVM passes
-have been applied to it. If its output differs from the reference output, it
-assumes the difference resulted from a failure in one of the LLVM passes, and
-enters the <a href="#miscompilationdebug">miscompilation debugger</a>.
-Otherwise, there is no problem <tt>bugpoint</tt> can debug.</p>
-
-</div>
-
-<!-- ======================================================================= -->
-<h3>
- <a name="crashdebug">Crash debugger</a>
-</h3>
-
-<div>
-
-<p>If an optimizer or code generator crashes, <tt>bugpoint</tt> will try as hard
-as it can to reduce the list of passes (for optimizer crashes) and the size of
-the test program. First, <tt>bugpoint</tt> figures out which combination of
-optimizer passes triggers the bug. This is useful when debugging a problem
-exposed by <tt>opt</tt>, for example, because it runs over 38 passes.</p>
-
-<p>Next, <tt>bugpoint</tt> tries removing functions from the test program, to
-reduce its size. Usually it is able to reduce a test program to a single
-function, when debugging intraprocedural optimizations. Once the number of
-functions has been reduced, it attempts to delete various edges in the control
-flow graph, to reduce the size of the function as much as possible. Finally,
-<tt>bugpoint</tt> deletes any individual LLVM instructions whose absence does
-not eliminate the failure. At the end, <tt>bugpoint</tt> should tell you what
-passes crash, give you a bitcode file, and give you instructions on how to
-reproduce the failure with <tt>opt</tt> or <tt>llc</tt>.</p>
-
-</div>
-
-<!-- ======================================================================= -->
-<h3>
- <a name="codegendebug">Code generator debugger</a>
-</h3>
-
-<div>
-
-<p>The code generator debugger attempts to narrow down the amount of code that
-is being miscompiled by the selected code generator. To do this, it takes the
-test program and partitions it into two pieces: one piece which it compiles
-with the "safe" backend (into a shared object), and one piece which it runs with
-either the JIT or the static LLC compiler. It uses several techniques to
-reduce the amount of code pushed through the LLVM code generator, to reduce the
-potential scope of the problem. After it is finished, it emits two bitcode
-files (called "test" [to be compiled with the code generator] and "safe" [to be
-compiled with the "safe" backend], respectively), and instructions for reproducing
-the problem. The code generator debugger assumes that the "safe" backend produces
-good code.</p>
-
-</div>
-
-<!-- ======================================================================= -->
-<h3>
- <a name="miscompilationdebug">Miscompilation debugger</a>
-</h3>
-
-<div>
-
-<p>The miscompilation debugger works similarly to the code generator debugger.
-It works by splitting the test program into two pieces, running the
-optimizations specified on one piece, linking the two pieces back together, and
-then executing the result. It attempts to narrow down the list of passes to
-the one (or few) which are causing the miscompilation, then reduce the portion
-of the test program which is being miscompiled. The miscompilation debugger
-assumes that the selected code generator is working properly.</p>
-
-</div>
-
-</div>
-
-<!-- *********************************************************************** -->
-<h2>
- <a name="advice">Advice for using bugpoint</a>
-</h2>
-<!-- *********************************************************************** -->
-
-<div>
-
-<tt>bugpoint</tt> can be a remarkably useful tool, but it sometimes works in
-non-obvious ways. Here are some hints and tips:<p>
-
-<ol>
-<li>In the code generator and miscompilation debuggers, <tt>bugpoint</tt> only
- works with programs that have deterministic output. Thus, if the program
- outputs <tt>argv[0]</tt>, the date, time, or any other "random" data,
- <tt>bugpoint</tt> may misinterpret differences in these data, when output,
- as the result of a miscompilation. Programs should be temporarily modified
- to disable outputs that are likely to vary from run to run.
-
-<li>In the code generator and miscompilation debuggers, debugging will go
- faster if you manually modify the program or its inputs to reduce the
- runtime, but still exhibit the problem.
-
-<li><tt>bugpoint</tt> is extremely useful when working on a new optimization:
- it helps track down regressions quickly. To avoid having to relink
- <tt>bugpoint</tt> every time you change your optimization however, have
- <tt>bugpoint</tt> dynamically load your optimization with the
- <tt>-load</tt> option.
-
-<li><p><tt>bugpoint</tt> can generate a lot of output and run for a long period
- of time. It is often useful to capture the output of the program to file.
- For example, in the C shell, you can run:</p>
-
-<div class="doc_code">
-<p><tt>bugpoint ... |& tee bugpoint.log</tt></p>
-</div>
-
- <p>to get a copy of <tt>bugpoint</tt>'s output in the file
- <tt>bugpoint.log</tt>, as well as on your terminal.</p>
-
-<li><tt>bugpoint</tt> cannot debug problems with the LLVM linker. If
- <tt>bugpoint</tt> crashes before you see its "All input ok" message,
- you might try <tt>llvm-link -v</tt> on the same set of input files. If
- that also crashes, you may be experiencing a linker bug.
-
-<li><tt>bugpoint</tt> is useful for proactively finding bugs in LLVM.
- Invoking <tt>bugpoint</tt> with the <tt>-find-bugs</tt> option will cause
- the list of specified optimizations to be randomized and applied to the
- program. This process will repeat until a bug is found or the user
- kills <tt>bugpoint</tt>.
-</ol>
-
-</div>
-<!-- *********************************************************************** -->
-<h2>
- <a name="notEnough">What to do when bugpoint isn't enough</a>
-</h2>
-<!-- *********************************************************************** -->
-
-<div>
-
-<p>Sometimes, <tt>bugpoint</tt> is not enough. In particular, InstCombine and
-TargetLowering both have visitor structured code with lots of potential
-transformations. If the process of using bugpoint has left you with
-still too much code to figure out and the problem seems
-to be in instcombine, the following steps may help. These same techniques
-are useful with TargetLowering as well.</p>
-
-<p>Turn on <tt>-debug-only=instcombine</tt> and see which transformations
-within instcombine are firing by selecting out lines with "<tt>IC</tt>"
-in them.</p>
-
-<p>At this point, you have a decision to make. Is the number
-of transformations small enough to step through them using a debugger?
-If so, then try that.</p>
-
-<p>If there are too many transformations, then a source modification
-approach may be helpful.
-In this approach, you can modify the source code of instcombine
-to disable just those transformations that are being performed on your
-test input and perform a binary search over the set of transformations.
-One set of places to modify are the "<tt>visit*</tt>" methods of
-<tt>InstCombiner</tt> (<I>e.g.</I> <tt>visitICmpInst</tt>) by adding a
-"<tt>return false</tt>" as the first line of the method.</p>
-
-<p>If that still doesn't remove enough, then change the caller of
-<tt>InstCombiner::DoOneIteration</tt>, <tt>InstCombiner::runOnFunction</tt>
-to limit the number of iterations.</p>
-
-<p>You may also find it useful to use "<tt>-stats</tt>" now to see what parts
-of instcombine are firing. This can guide where to put additional reporting
-code.</p>
-
-<p>At this point, if the amount of transformations is still too large, then
-inserting code to limit whether or not to execute the body of the code
-in the visit function can be helpful. Add a static counter which is
-incremented on every invocation of the function. Then add code which
-simply returns false on desired ranges. For example:</p>
-
-<div class="doc_code">
-<p><tt>static int calledCount = 0;</tt></p>
-<p><tt>calledCount++;</tt></p>
-<p><tt>DEBUG(if (calledCount < 212) return false);</tt></p>
-<p><tt>DEBUG(if (calledCount > 217) return false);</tt></p>
-<p><tt>DEBUG(if (calledCount == 213) return false);</tt></p>
-<p><tt>DEBUG(if (calledCount == 214) return false);</tt></p>
-<p><tt>DEBUG(if (calledCount == 215) return false);</tt></p>
-<p><tt>DEBUG(if (calledCount == 216) return false);</tt></p>
-<p><tt>DEBUG(dbgs() << "visitXOR calledCount: " << calledCount
- << "\n");</tt></p>
-<p><tt>DEBUG(dbgs() << "I: "; I->dump());</tt></p>
-</div>
-
-<p>could be added to <tt>visitXOR</tt> to limit <tt>visitXor</tt> to being
-applied only to calls 212 and 217. This is from an actual test case and raises
-an important point---a simple binary search may not be sufficient, as
-transformations that interact may require isolating more than one call.
-In TargetLowering, use <tt>return SDNode();</tt> instead of
-<tt>return false;</tt>.</p>
-
-<p>Now that that the number of transformations is down to a manageable
-number, try examining the output to see if you can figure out which
-transformations are being done. If that can be figured out, then
-do the usual debugging. If which code corresponds to the transformation
-being performed isn't obvious, set a breakpoint after the call count
-based disabling and step through the code. Alternatively, you can use
-"printf" style debugging to report waypoints.</p>
-
-</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>
-
- <a href="mailto:sabre at nondot.org">Chris Lattner</a><br>
- <a href="http://llvm.org/">LLVM Compiler Infrastructure</a><br>
- Last modified: $Date$
-</address>
-
-</body>
-</html>
Added: llvm/trunk/docs/Bugpoint.rst
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/Bugpoint.rst?rev=159199&view=auto
==============================================================================
--- llvm/trunk/docs/Bugpoint.rst (added)
+++ llvm/trunk/docs/Bugpoint.rst Tue Jun 26 06:37:00 2012
@@ -0,0 +1,218 @@
+.. _bugpoint:
+
+====================================
+LLVM bugpoint tool: design and usage
+====================================
+
+.. contents::
+ :local:
+
+Description
+===========
+
+``bugpoint`` narrows down the source of problems in LLVM tools and passes. It
+can be used to debug three types of failures: optimizer crashes, miscompilations
+by optimizers, or bad native code generation (including problems in the static
+and JIT compilers). It aims to reduce large test cases to small, useful ones.
+For example, if ``opt`` crashes while optimizing a file, it will identify the
+optimization (or combination of optimizations) that causes the crash, and reduce
+the file down to a small example which triggers the crash.
+
+For detailed case scenarios, such as debugging ``opt``, or one of the LLVM code
+generators, see `How To Submit a Bug Report document <HowToSubmitABug.html>`_.
+
+Design Philosophy
+=================
+
+``bugpoint`` is designed to be a useful tool without requiring any hooks into
+the LLVM infrastructure at all. It works with any and all LLVM passes and code
+generators, and does not need to "know" how they work. Because of this, it may
+appear to do stupid things or miss obvious simplifications. ``bugpoint`` is
+also designed to trade off programmer time for computer time in the
+compiler-debugging process; consequently, it may take a long period of
+(unattended) time to reduce a test case, but we feel it is still worth it. Note
+that ``bugpoint`` is generally very quick unless debugging a miscompilation
+where each test of the program (which requires executing it) takes a long time.
+
+Automatic Debugger Selection
+----------------------------
+
+``bugpoint`` reads each ``.bc`` or ``.ll`` file specified on the command line
+and links them together into a single module, called the test program. If any
+LLVM passes are specified on the command line, it runs these passes on the test
+program. If any of the passes crash, or if they produce malformed output (which
+causes the verifier to abort), ``bugpoint`` starts the `crash debugger`_.
+
+Otherwise, if the ``-output`` option was not specified, ``bugpoint`` runs the
+test program with the "safe" backend (which is assumed to generate good code) to
+generate a reference output. Once ``bugpoint`` has a reference output for the
+test program, it tries executing it with the selected code generator. If the
+selected code generator crashes, ``bugpoint`` starts the `crash debugger`_ on
+the code generator. Otherwise, if the resulting output differs from the
+reference output, it assumes the difference resulted from a code generator
+failure, and starts the `code generator debugger`_.
+
+Finally, if the output of the selected code generator matches the reference
+output, ``bugpoint`` runs the test program after all of the LLVM passes have
+been applied to it. If its output differs from the reference output, it assumes
+the difference resulted from a failure in one of the LLVM passes, and enters the
+`miscompilation debugger`_. Otherwise, there is no problem ``bugpoint`` can
+debug.
+
+.. _crash debugger:
+
+Crash debugger
+--------------
+
+If an optimizer or code generator crashes, ``bugpoint`` will try as hard as it
+can to reduce the list of passes (for optimizer crashes) and the size of the
+test program. First, ``bugpoint`` figures out which combination of optimizer
+passes triggers the bug. This is useful when debugging a problem exposed by
+``opt``, for example, because it runs over 38 passes.
+
+Next, ``bugpoint`` tries removing functions from the test program, to reduce its
+size. Usually it is able to reduce a test program to a single function, when
+debugging intraprocedural optimizations. Once the number of functions has been
+reduced, it attempts to delete various edges in the control flow graph, to
+reduce the size of the function as much as possible. Finally, ``bugpoint``
+deletes any individual LLVM instructions whose absence does not eliminate the
+failure. At the end, ``bugpoint`` should tell you what passes crash, give you a
+bitcode file, and give you instructions on how to reproduce the failure with
+``opt`` or ``llc``.
+
+.. _code generator debugger:
+
+Code generator debugger
+-----------------------
+
+The code generator debugger attempts to narrow down the amount of code that is
+being miscompiled by the selected code generator. To do this, it takes the test
+program and partitions it into two pieces: one piece which it compiles with the
+"safe" backend (into a shared object), and one piece which it runs with either
+the JIT or the static LLC compiler. It uses several techniques to reduce the
+amount of code pushed through the LLVM code generator, to reduce the potential
+scope of the problem. After it is finished, it emits two bitcode files (called
+"test" [to be compiled with the code generator] and "safe" [to be compiled with
+the "safe" backend], respectively), and instructions for reproducing the
+problem. The code generator debugger assumes that the "safe" backend produces
+good code.
+
+.. _miscompilation debugger:
+
+Miscompilation debugger
+-----------------------
+
+The miscompilation debugger works similarly to the code generator debugger. It
+works by splitting the test program into two pieces, running the optimizations
+specified on one piece, linking the two pieces back together, and then executing
+the result. It attempts to narrow down the list of passes to the one (or few)
+which are causing the miscompilation, then reduce the portion of the test
+program which is being miscompiled. The miscompilation debugger assumes that
+the selected code generator is working properly.
+
+Advice for using bugpoint
+=========================
+
+``bugpoint`` can be a remarkably useful tool, but it sometimes works in
+non-obvious ways. Here are some hints and tips:
+
+* In the code generator and miscompilation debuggers, ``bugpoint`` only works
+ with programs that have deterministic output. Thus, if the program outputs
+ ``argv[0]``, the date, time, or any other "random" data, ``bugpoint`` may
+ misinterpret differences in these data, when output, as the result of a
+ miscompilation. Programs should be temporarily modified to disable outputs
+ that are likely to vary from run to run.
+
+* In the code generator and miscompilation debuggers, debugging will go faster
+ if you manually modify the program or its inputs to reduce the runtime, but
+ still exhibit the problem.
+
+* ``bugpoint`` is extremely useful when working on a new optimization: it helps
+ track down regressions quickly. To avoid having to relink ``bugpoint`` every
+ time you change your optimization however, have ``bugpoint`` dynamically load
+ your optimization with the ``-load`` option.
+
+* ``bugpoint`` can generate a lot of output and run for a long period of time.
+ It is often useful to capture the output of the program to file. For example,
+ in the C shell, you can run:
+
+ .. code-block:: bash
+
+ bugpoint ... |& tee bugpoint.log
+
+ to get a copy of ``bugpoint``'s output in the file ``bugpoint.log``, as well
+ as on your terminal.
+
+* ``bugpoint`` cannot debug problems with the LLVM linker. If ``bugpoint``
+ crashes before you see its "All input ok" message, you might try ``llvm-link
+ -v`` on the same set of input files. If that also crashes, you may be
+ experiencing a linker bug.
+
+* ``bugpoint`` is useful for proactively finding bugs in LLVM. Invoking
+ ``bugpoint`` with the ``-find-bugs`` option will cause the list of specified
+ optimizations to be randomized and applied to the program. This process will
+ repeat until a bug is found or the user kills ``bugpoint``.
+
+What to do when bugpoint isn't enough
+=====================================
+
+Sometimes, ``bugpoint`` is not enough. In particular, InstCombine and
+TargetLowering both have visitor structured code with lots of potential
+transformations. If the process of using bugpoint has left you with still too
+much code to figure out and the problem seems to be in instcombine, the
+following steps may help. These same techniques are useful with TargetLowering
+as well.
+
+Turn on ``-debug-only=instcombine`` and see which transformations within
+instcombine are firing by selecting out lines with "``IC``" in them.
+
+At this point, you have a decision to make. Is the number of transformations
+small enough to step through them using a debugger? If so, then try that.
+
+If there are too many transformations, then a source modification approach may
+be helpful. In this approach, you can modify the source code of instcombine to
+disable just those transformations that are being performed on your test input
+and perform a binary search over the set of transformations. One set of places
+to modify are the "``visit*``" methods of ``InstCombiner`` (*e.g.*
+``visitICmpInst``) by adding a "``return false``" as the first line of the
+method.
+
+If that still doesn't remove enough, then change the caller of
+``InstCombiner::DoOneIteration``, ``InstCombiner::runOnFunction`` to limit the
+number of iterations.
+
+You may also find it useful to use "``-stats``" now to see what parts of
+instcombine are firing. This can guide where to put additional reporting code.
+
+At this point, if the amount of transformations is still too large, then
+inserting code to limit whether or not to execute the body of the code in the
+visit function can be helpful. Add a static counter which is incremented on
+every invocation of the function. Then add code which simply returns false on
+desired ranges. For example:
+
+.. code-block:: c++
+
+
+ static int calledCount = 0;
+ calledCount++;
+ DEBUG(if (calledCount < 212) return false);
+ DEBUG(if (calledCount > 217) return false);
+ DEBUG(if (calledCount == 213) return false);
+ DEBUG(if (calledCount == 214) return false);
+ DEBUG(if (calledCount == 215) return false);
+ DEBUG(if (calledCount == 216) return false);
+ DEBUG(dbgs() << "visitXOR calledCount: " << calledCount << "\n");
+ DEBUG(dbgs() << "I: "; I->dump());
+
+could be added to ``visitXOR`` to limit ``visitXor`` to being applied only to
+calls 212 and 217. This is from an actual test case and raises an important
+point---a simple binary search may not be sufficient, as transformations that
+interact may require isolating more than one call. In TargetLowering, use
+``return SDNode();`` instead of ``return false;``.
+
+Now that that the number of transformations is down to a manageable number, try
+examining the output to see if you can figure out which transformations are
+being done. If that can be figured out, then do the usual debugging. If which
+code corresponds to the transformation being performed isn't obvious, set a
+breakpoint after the call count based disabling and step through the code.
+Alternatively, you can use "``printf``" style debugging to report waypoints.
Modified: llvm/trunk/docs/subsystems.rst
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/subsystems.rst?rev=159199&r1=159198&r2=159199&view=diff
==============================================================================
--- llvm/trunk/docs/subsystems.rst (original)
+++ llvm/trunk/docs/subsystems.rst Tue Jun 26 06:37:00 2012
@@ -8,6 +8,7 @@
AliasAnalysis
BranchWeightMetadata
+ Bugpoint
LinkTimeOptimization
SegmentedStacks
TableGenFundamentals
@@ -51,7 +52,7 @@
This document describes the design and implementation of exception handling
in LLVM.
-* `Bugpoint <Bugpoint.html>`_
+* :ref:`bugpoint`
Automatic bug finder and test-case reducer description and usage
information.
More information about the llvm-commits
mailing list