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gerrit-public.fairphone.software / fp2-dev / platform / external / llvm / 7b7fa74527997516de1b96f14026c9e2e9a26a50 / . / docs / ReleaseNotes.html
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Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]7 <title>LLVM 3.0 Release Notes</title>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]8</head>
9<body>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]10
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]11<h1>LLVM 3.0 Release Notes</h1>
Mikhail Glushenkovea65d7d2008-10-13 02:08:34 +0000[diff] [blame]12
Chris Lattner0e464a92010-03-17 04:02:39 +0000[diff] [blame]13<img align=right src="http://llvm.org/img/DragonSmall.png"
Gabor Greifee2187a2010-04-22 10:21:43 +0000[diff] [blame]14 width="136" height="136" alt="LLVM Dragon Logo">
Chris Lattner0e464a92010-03-17 04:02:39 +0000[diff] [blame]15
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]16<ol>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]17 <li><a href="#intro">Introduction</a></li>
Chris Lattner96a445e2008-10-13 18:01:01 +0000[diff] [blame]18 <li><a href="#subproj">Sub-project Status Update</a></li>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]19 <li><a href="#externalproj">External Projects Using LLVM 3.0</a></li>
20 <li><a href="#whatsnew">What's New in LLVM 3.0?</a></li>
Chris Lattner4b538b92004-04-30 22:17:12 +0000[diff] [blame]21 <li><a href="GettingStarted.html">Installation Instructions</a></li>
Dan Gohman44aa9212008-10-14 16:23:02 +0000[diff] [blame]22 <li><a href="#knownproblems">Known Problems</a></li>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]23 <li><a href="#additionalinfo">Additional Information</a></li>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]24</ol>
25
Chris Lattner7911ce22004-05-23 21:07:27 +0000[diff] [blame]26<div class="doc_author">
NAKAMURA Takumib9a33632011-04-09 02:13:37 +0000[diff] [blame]27 <p>Written by the <a href="http://llvm.org/">LLVM Team</a></p>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]28</div>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]29
Chris Lattner49123fd2011-04-06 06:29:50 +0000[diff] [blame]30<!--
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]31<h1 style="color:red">These are in-progress notes for the upcoming LLVM 3.0
Jeffrey Yasskinbec48772010-01-28 01:14:43 +0000[diff] [blame]32release.<br>
33You may prefer the
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]34<a href="http://llvm.org/releases/2.9/docs/ReleaseNotes.html">LLVM 2.9
Dan Gohmanb44f6c62010-05-03 23:51:05 +0000[diff] [blame]35Release Notes</a>.</h1>
Chris Lattner49123fd2011-04-06 06:29:50 +0000[diff] [blame]36 -->
Jeffrey Yasskinbec48772010-01-28 01:14:43 +0000[diff] [blame]37
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]38<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]39<h2>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]40 <a name="intro">Introduction</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]41</h2>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]42<!-- *********************************************************************** -->
43
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]44<div>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]45
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]46<p>This document contains the release notes for the LLVM Compiler
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]47 Infrastructure, release 3.0. Here we describe the status of LLVM, including
48 major improvements from the previous release and significant known problems.
49 All LLVM releases may be downloaded from
50 the <a href="http://llvm.org/releases/">LLVM releases web site</a>.</p>
Chris Lattner19092612003-10-02 16:38:05 +0000[diff] [blame]51
Chris Lattner7506b1d2004-12-07 08:04:13 +0000[diff] [blame]52<p>For more information about LLVM, including information about the latest
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]53 release, please check out the <a href="http://llvm.org/">main LLVM web
54 site</a>. If you have questions or comments,
55 the <a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVM
56 Developer's Mailing List</a> is a good place to send them.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]57
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]58<p>Note that if you are reading this file from a Subversion checkout or the main
59 LLVM web page, this document applies to the <i>next</i> release, not the
60 current one. To see the release notes for a specific release, please see the
61 <a href="http://llvm.org/releases/">releases page</a>.</p>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]62
63</div>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]64
Chris Lattnere4dc1962011-04-05 23:22:33 +0000[diff] [blame]65<!-- Features that need text if they're finished for 3.1:
66 ARM EHABI
Chris Lattner914ce462010-04-22 06:28:20 +0000[diff] [blame]67 combiner-aa?
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]68 strong phi elim
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]69 loop dependence analysis
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]70 CorrelatedValuePropagation
Chris Lattnere4dc1962011-04-05 23:22:33 +0000[diff] [blame]71 lib/Transforms/IPO/MergeFunctions.cpp => consider for 3.1.
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]72 -->
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]73
Chris Lattner96a445e2008-10-13 18:01:01 +0000[diff] [blame]74<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]75<h2>
Chris Lattner96a445e2008-10-13 18:01:01 +0000[diff] [blame]76 <a name="subproj">Sub-project Status Update</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]77</h2>
Chris Lattner96a445e2008-10-13 18:01:01 +0000[diff] [blame]78<!-- *********************************************************************** -->
Chris Lattnerea34f642008-06-08 21:34:41 +0000[diff] [blame]79
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]80<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]81
82<p>The LLVM 3.0 distribution currently consists of code from the core LLVM
83 repository (which roughly includes the LLVM optimizers, code generators and
84 supporting tools), the Clang repository and the llvm-gcc repository. In
85 addition to this code, the LLVM Project includes other sub-projects that are
86 in development. Here we include updates on these subprojects.</p>
Chris Lattner96a445e2008-10-13 18:01:01 +0000[diff] [blame]87
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]88<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]89<h3>
Chris Lattnerfb97b2d2008-10-13 18:11:54 +0000[diff] [blame]90<a name="clang">Clang: C/C++/Objective-C Frontend Toolkit</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]91</h3>
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]92
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]93<div>
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]94
Chris Lattner095539f2010-04-26 17:42:18 +0000[diff] [blame]95<p><a href="http://clang.llvm.org/">Clang</a> is an LLVM front end for the C,
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]96 C++, and Objective-C languages. Clang aims to provide a better user
97 experience through expressive diagnostics, a high level of conformance to
98 language standards, fast compilation, and low memory use. Like LLVM, Clang
99 provides a modular, library-based architecture that makes it suitable for
100 creating or integrating with other development tools. Clang is considered a
101 production-quality compiler for C, Objective-C, C++ and Objective-C++ on x86
102 (32- and 64-bit), and for darwin/arm targets.</p>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]103
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]104<p>In the LLVM 3.0 time-frame, the Clang team has made many improvements:</p>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]105
106<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]107 <li>Greatly improved support for building C++ applications, with greater
108 stability and better diagnostics.</li>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]109
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]110 <li><a href="http://clang.llvm.org/cxx_status.html">Improved support</a> for
111 the <a href="http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=50372">C++
112 2011</a> standard, including implementations of non-static data member
113 initializers, alias templates, delegating constructors, the range-based
114 for loop, and implicitly-generated move constructors and move assignment
115 operators, among others.</li>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]116
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]117 <li>Implemented support for some features of the upcoming C1x standard,
118 including static assertions and generic selections.</li>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]119
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]120 <li>Better detection of include and linking paths for system headers and
121 libraries, especially for Linux distributions.</li>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]122
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]123 <li>Implemented support
124 for <a href="http://clang.llvm.org/docs/AutomaticReferenceCounting.html">Automatic
125 Reference Counting</a> for Objective-C.</li>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]126
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]127 <li>Implemented a number of optimizations in <tt>libclang</tt>, the Clang C
128 interface, to improve the performance of code completion and the mapping
129 from source locations to abstract syntax tree nodes.</li>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]130</ul>
131
Chris Lattner0a6f6d52011-04-05 07:19:28 +0000[diff] [blame]132
Duncan Sandsf3ba7af2011-04-06 08:07:40 +0000[diff] [blame]133<p>If Clang rejects your code but another compiler accepts it, please take a
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]134 look at the <a href="http://clang.llvm.org/compatibility.html">language
135 compatibility</a> guide to make sure this is not intentional or a known
136 issue.</p>
Bill Wendling741748a2008-10-27 09:27:33 +0000[diff] [blame]137
Chris Lattnerfb97b2d2008-10-13 18:11:54 +0000[diff] [blame]138</div>
139
140<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]141<h3>
Duncan Sands528a5102011-04-04 11:09:08 +0000[diff] [blame]142<a name="dragonegg">DragonEgg: GCC front-ends, LLVM back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]143</h3>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]144
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]145<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]146<p><a href="http://dragonegg.llvm.org/">DragonEgg</a> is a
147 <a href="http://gcc.gnu.org/wiki/plugins">gcc plugin</a> that replaces GCC's
148 optimizers and code generators with LLVM's. Currently it requires a patched
149 version of gcc-4.5. The plugin can target the x86-32 and x86-64 processor
150 families and has been used successfully on the Darwin, FreeBSD and Linux
151 platforms. The Ada, C, C++ and Fortran languages work well. The plugin is
152 capable of compiling plenty of Obj-C, Obj-C++ and Java but it is not known
153 whether the compiled code actually works or not!</p>
Duncan Sands749fd832010-04-02 09:23:15 +0000[diff] [blame]154
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]155<p>The 3.0 release has the following notable changes:</p>
156
Duncan Sands4b1da2b2010-09-30 17:37:34 +0000[diff] [blame]157<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]158<!--
159<li></li>
160-->
Duncan Sands4b1da2b2010-09-30 17:37:34 +0000[diff] [blame]161</ul>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]162
163</div>
164
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]165<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]166<h3>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]167<a name="compiler-rt">compiler-rt: Compiler Runtime Library</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]168</h3>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]169
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]170<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]171
172<p>The new LLVM <a href="http://compiler-rt.llvm.org/">compiler-rt project</a>
173 is a simple library that provides an implementation of the low-level
174 target-specific hooks required by code generation and other runtime
175 components. For example, when compiling for a 32-bit target, converting a
176 double to a 64-bit unsigned integer is compiled into a runtime call to the
177 "__fixunsdfdi" function. The compiler-rt library provides highly optimized
178 implementations of this and other low-level routines (some are 3x faster than
179 the equivalent libgcc routines).</p>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]180
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]181<p>In the LLVM 3.0 timeframe,</p>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]182
183</div>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]184
185<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]186<h3>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]187<a name="lldb">LLDB: Low Level Debugger</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]188</h3>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]189
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]190<div>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]191
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]192<p>LLDB has advanced by leaps and bounds in the 3.0 timeframe. It is
193 dramatically more stable and useful, and includes both a
194 new <a href="http://lldb.llvm.org/tutorial.html">tutorial</a> and
195 a <a href="http://lldb.llvm.org/lldb-gdb.html">side-by-side comparison with
196 GDB</a>.</p>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]197
198</div>
199
200<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]201<h3>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]202<a name="libc++">libc++: C++ Standard Library</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]203</h3>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]204
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]205<div>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]206
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]207<p>Like compiler_rt, libc++ is now <a href="DeveloperPolicy.html#license">dual
208 licensed</a> under the MIT and UIUC license, allowing it to be used more
209 permissively.</p>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]210
211</div>
212
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]213
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]214<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]215<h3>
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]216<a name="LLBrowse">LLBrowse: IR Browser</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]217</h3>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]218
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]219<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]220
221<p><a href="http://llvm.org/svn/llvm-project/llbrowse/trunk/doc/LLBrowse.html">
222 LLBrowse</a> is an interactive viewer for LLVM modules. It can load any LLVM
223 module and displays its contents as an expandable tree view, facilitating an
224 easy way to inspect types, functions, global variables, or metadata nodes. It
225 is fully cross-platform, being based on the popular wxWidgets GUI
226 toolkit.</p>
227
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]228</div>
229
230<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]231<h3>
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]232<a name="vmkit">VMKit</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]233</h3>
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]234
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]235<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]236
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]237<p>The <a href="http://vmkit.llvm.org/">VMKit project</a> is an implementation
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]238 of a Java Virtual Machine (Java VM or JVM) that uses LLVM for static and
239 just-in-time compilation. As of LLVM 3.0, VMKit now supports generational
240 garbage collectors. The garbage collectors are provided by the MMTk
241 framework, and VMKit can be configured to use one of the numerous implemented
242 collectors of MMTk.</p>
243
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]244</div>
245
246
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]247<!--=========================================================================-->
Chris Lattner7a8e6c52011-04-05 18:38:45 +0000[diff] [blame]248<!--
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]249<h3>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]250<a name="klee">KLEE: A Symbolic Execution Virtual Machine</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]251</h3>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]252
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]253<div>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]254<p>
255<a href="http://klee.llvm.org/">KLEE</a> is a symbolic execution framework for
256programs in LLVM bitcode form. KLEE tries to symbolically evaluate "all" paths
257through the application and records state transitions that lead to fault
258states. This allows it to construct testcases that lead to faults and can even
259be used to verify some algorithms.
260</p>
261
Chris Lattnerbe2e1b52011-03-10 07:43:44 +0000[diff] [blame]262<p>UPDATE!</p>
Chris Lattner7a8e6c52011-04-05 18:38:45 +0000[diff] [blame]263</div>-->
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]264
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]265</div>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]266
Chris Lattnerab68e9e2009-02-26 22:33:38 +0000[diff] [blame]267<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]268<h2>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]269 <a name="externalproj">External Open Source Projects Using LLVM 3.0</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]270</h2>
Chris Lattnerab68e9e2009-02-26 22:33:38 +0000[diff] [blame]271<!-- *********************************************************************** -->
272
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]273<div>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]274
275<p>An exciting aspect of LLVM is that it is used as an enabling technology for
276 a lot of other language and tools projects. This section lists some of the
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]277 projects that have already been updated to work with LLVM 3.0.</p>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]278
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]279<!--=========================================================================-->
Bill Wendling7be6bc52011-10-26 00:17:54 +0000[diff] [blame]280<h3>AddressSanitizer</h3>
281
282<div>
283
284<p><a href="http://code.google.com/p/address-sanitizer/">AddressSanitizer</a>
285 uses compiler instrumentation and a specialized malloc library to find C/C++
286 bugs such as use-after-free and out-of-bound accesses to heap, stack, and
287 globals. The key feature of the tool is speed: the average slowdown
288 introduced by AddressSanitizer is less than 2x.</p>
289
290</div>
291
292<!--=========================================================================-->
Bill Wendling29817ea2011-10-26 00:14:36 +0000[diff] [blame]293<h3>ClamAV</h3>
294
295<div>
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]296
Bill Wendling29817ea2011-10-26 00:14:36 +0000[diff] [blame]297<p><a href="http://www.clamav.net">Clam AntiVirus</a> is an open source (GPL)
298 anti-virus toolkit for UNIX, designed especially for e-mail scanning on mail
299 gateways.</p>
300
301<p>Since version 0.96 it
302 has <a href="http://vrt-sourcefire.blogspot.com/2010/09/introduction-to-clamavs-low-level.html">bytecode
303 signatures</a> that allow writing detections for complex malware.</p>
304
305<p>It uses LLVM's JIT to speed up the execution of bytecode on X86, X86-64,
306 PPC32/64, falling back to its own interpreter otherwise. The git version was
307 updated to work with LLVM 3.0.</p>
308
309</div>
310
311<!--=========================================================================-->
Bill Wendling65d1f412011-10-26 18:23:06 +0000[diff] [blame]312<h3>clReflect</h3>
313
314<div>
315
316<p><a href="https://bitbucket.org/dwilliamson/clreflect">clReflect</a> is a C++
317 parser that uses clang/LLVM to derive a light-weight reflection database
318 suitable for use in game development. It comes with a very simple runtime
319 library for loading and querying the database, requiring no external
320 dependencies (including CRT), and an additional utility library for object
321 management and serialisation.</p>
322
323</div>
324
325<!--=========================================================================-->
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]326<!-- FIXME: Comment out
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]327<h3>Crack Programming Language</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]328
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]329<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]330<p>
331<a href="http://code.google.com/p/crack-language/">Crack</a> aims to provide the
332ease of development of a scripting language with the performance of a compiled
333language. The language derives concepts from C++, Java and Python, incorporating
334object-oriented programming, operator overloading and strong typing.</p>
335</div>
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]336-->
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]337
338<!--=========================================================================-->
Bill Wendlingf9778192011-10-26 00:09:55 +0000[diff] [blame]339<h3>Glasgow Haskell Compiler (GHC)</h3>
340
341<div>
342
343<p>GHC is an open source, state-of-the-art programming suite for Haskell, a
344 standard lazy functional programming language. It includes an optimizing
345 static compiler generating good code for a variety of platforms, together
346 with an interactive system for convenient, quick development.</p>
347
348<p>GHC 7.0 and onwards include an LLVM code generator, supporting LLVM 2.8 and
349 later. Since LLVM 2.9, GHC now includes experimental support for the ARM
350 platform with LLVM 3.0.</p>
351
352</div>
353
354<!--=========================================================================-->
Bill Wendlingf62333d2011-10-25 20:35:31 +0000[diff] [blame]355<h3>gwXscript</h3>
356
357<div>
358
359<p><a href="http://botwars.tk/gwscript/">gwXscript</a> is an object oriented,
Bill Wendling7c38de22011-10-26 04:24:15 +0000[diff] [blame]360 aspect oriented programming language which can create both executables (ELF,
Bill Wendlingf62333d2011-10-25 20:35:31 +0000[diff] [blame]361 EXE) and shared libraries (DLL, SO, DYNLIB). The compiler is implemented in
362 its own language and translates scripts into LLVM-IR which can be optimized
363 and translated into native code by the LLVM framework. Source code in
364 gwScript contains definitions that expand the namespaces. So you can build
365 your project and simply 'plug out' features by removing a file. The remaining
366 project does not leave scars since you directly separate concerns by the
367 'template' feature of gwX. It is also possible to add new features to a
368 project by just adding files and without editing the original project. This
369 language is used for example to create games or content management systems
370 that should be extendable.</p>
371
372<p>gwXscript is strongly typed and offers comfort with its native types string,
373 hash and array. You can easily write new libraries in gwXscript or native
374 code. gwXscript is type safe and users should not be able to crash your
375 program or execute malicious code except code that is eating CPU time.</p>
376
377</div>
378
379<!--=========================================================================-->
Bill Wendling57fd8762011-10-26 18:20:54 +0000[diff] [blame]380<h3>LanguageKit and Pragmatic Smalltalk</h3>
381
382<div>
383
384<p><a href="http://etoileos.com/etoile/features/languagekit/">LanguageKit</a> is
385 a framework for implementing dynamic languages sharing an object model with
386 Objective-C. It provides static and JIT compilation using LLVM along with
387 its own interpreter. Pragmatic Smalltalk is a dialect of Smalltalk, built on
388 top of LanguageKit, that interfaces directly with Objective-C, sharing the
389 same object representation and message sending behaviour. These projects are
390 developed as part of the &Eacute;toi&eacute; desktop environment.</p>
391
392</div>
393
394<!--=========================================================================-->
Bill Wendlingd4821b82011-10-26 00:16:17 +0000[diff] [blame]395<h3>Mono</h3>
396
397<div>
398
399<p>An open source, cross-platform implementation of C# and the CLR that is
400 binary compatible with Microsoft.NET. Has an optional, dynamically-loaded
401 LLVM code generation backend in Mini, the JIT compiler.</p>
402
403<p>Note that we use a Git mirror of LLVM with some patches. See:
404 https://github.com/mono/llvm</p>
405
406</div>
407
408<!--=========================================================================-->
Bill Wendlingba226272011-10-25 20:37:45 +0000[diff] [blame]409<h3>Portable OpenCL (pocl)</h3>
410
411<div>
412
413<p>Portable OpenCL is an open source implementation of the OpenCL standard which
414 can be easily adapted for new targets. One of the goals of the project is
415 improving performance portability of OpenCL programs, avoiding the need for
416 target-dependent manual optimizations. A "native" target is included, which
417 allows running OpenCL kernels on the host (CPU).</p>
418
419</div>
420
421<!--=========================================================================-->
Bill Wendling0bad98c2011-10-25 20:39:06 +0000[diff] [blame]422<h3>Pure</h3>
423
424<div>
425<p><a href="http://pure-lang.googlecode.com/">Pure</a> is an
426 algebraic/functional programming language based on term rewriting. Programs
427 are collections of equations which are used to evaluate expressions in a
428 symbolic fashion. The interpreter uses LLVM as a backend to JIT-compile Pure
429 programs to fast native code. Pure offers dynamic typing, eager and lazy
430 evaluation, lexical closures, a hygienic macro system (also based on term
431 rewriting), built-in list and matrix support (including list and matrix
432 comprehensions) and an easy-to-use interface to C and other programming
433 languages (including the ability to load LLVM bitcode modules, and inline C,
434 C++, Fortran and Faust code in Pure programs if the corresponding LLVM-enabled
435 compilers are installed).</p>
436
437<p>Pure version 0.48 has been tested and is known to work with LLVM 3.0
438 (and continues to work with older LLVM releases &gt;= 2.5).</p>
439
440</div>
441
442<!--=========================================================================-->
Bill Wendling537d85b2011-10-26 00:12:04 +0000[diff] [blame]443<h3>Renderscript</h3>
444
445<div>
446
447<p><a href="http://developer.android.com/guide/topics/renderscript/index.html">Renderscript</a>
448 is Android's advanced 3D graphics rendering and compute API. It provides a
449 portable C99-based language with extensions to facilitate common use cases
450 for enhancing graphics and thread level parallelism. The Renderscript
451 compiler frontend is based on Clang/LLVM. It emits a portable bitcode format
452 for the actual compiled script code, as well as reflects a Java interface for
453 developers to control the execution of the compiled bitcode. Executable
454 machine code is then generated from this bitcode by an LLVM backend on the
455 device. Renderscript is thus able to provide a mechanism by which Android
456 developers can improve performance of their applications while retaining
457 portability.</p>
458
459</div>
460
461<!--=========================================================================-->
Bill Wendling7d5b6212011-10-25 20:40:26 +0000[diff] [blame]462<h3>SAFECode</h3>
463
464<div>
465
466<p><a href="http://safecode.cs.illinois.edu">SAFECode</a> is a memory safe C/C++
467 compiler built using LLVM. It takes standard, unannotated C/C++ code,
468 analyzes the code to ensure that memory accesses and array indexing
469 operations are safe, and instruments the code with run-time checks when
470 safety cannot be proven statically. SAFECode can be used as a debugging aid
471 (like Valgrind) to find and repair memory safety bugs. It can also be used
472 to protect code from security attacks at run-time.</p>
473
474</div>
475
476<!--=========================================================================-->
Bill Wendling02b77b72011-10-26 07:38:19 +0000[diff] [blame]477<h3>The Stupid D Compiler (SDC)</h3>
478
479<div>
480
481<p><a href="https://github.com/bhelyer/SDC">The Stupid D Compiler</a> is a
482 project seeking to write a self-hosting compiler for the D programming
483 language without using the frontend of the reference compiler (DMD).</p>
484
485</div>
486
487<!--=========================================================================-->
Bill Wendling2d7b4af2011-10-25 20:24:32 +0000[diff] [blame]488<h3>TTA-based Co-design Environment (TCE)</h3>
489
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]490<div>
Bill Wendling2d7b4af2011-10-25 20:24:32 +0000[diff] [blame]491
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]492<p>TCE is a toolset for designing application-specific processors (ASP) based on
Bill Wendling2d7b4af2011-10-25 20:24:32 +0000[diff] [blame]493 the Transport triggered architecture (TTA). The toolset provides a complete
494 co-design flow from C/C++ programs down to synthesizable VHDL and parallel
495 program binaries. Processor customization points include the register files,
496 function units, supported operations, and the interconnection network.</p>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]497
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]498<p>TCE uses Clang and LLVM for C/C++ language support, target independent
Bill Wendling2d7b4af2011-10-25 20:24:32 +0000[diff] [blame]499 optimizations and also for parts of code generation. It generates new
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]500 LLVM-based code generators "on the fly" for the designed TTA processors and
501 loads them in to the compiler backend as runtime libraries to avoid
Bill Wendling2d7b4af2011-10-25 20:24:32 +0000[diff] [blame]502 per-target recompilation of larger parts of the compiler chain.</p>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]503
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]504</div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]505
506<!--=========================================================================-->
Bill Wendling628c2662011-10-25 20:27:37 +0000[diff] [blame]507<h3>Tart Programming Language</h3>
508
509<div>
510
511<p><a href="http://code.google.com/p/tart/">Tart</a> is a general-purpose,
512 strongly typed programming language designed for application
513 developers. Strongly inspired by Python and C#, Tart focuses on practical
514 solutions for the professional software developer, while avoiding the clutter
515 and boilerplate of legacy languages like Java and C++. Although Tart is still
516 in development, the current implementation supports many features expected of
517 a modern programming language, such as garbage collection, powerful
518 bidirectional type inference, a greatly simplified syntax for template
519 metaprogramming, closures and function literals, reflection, operator
520 overloading, explicit mutability and immutability, and much more. Tart is
521 flexible enough to accommodate a broad range of programming styles and
522 philosophies, while maintaining a strong commitment to simplicity, minimalism
523 and elegance in design.</p>
524
525</div>
526
527<!--=========================================================================-->
Bill Wendling644ce532011-10-26 09:25:01 +0000[diff] [blame]528<h3>ThreadSanitizer</h3>
529
530<div>
531
532<p><a href="http://code.google.com/p/data-race-test/">ThreadSanitizer</a> is a
533 data race detector for (mostly) C and C++ code, available for Linux, Mac OS
534 and Windows. On different systems, we use binary instrumentation frameworks
535 (Valgrind, Pin and DynamoRio) as frontends that generate the program events
536 for the race detection algorithm. On Linux, there's an option of using
537 LLVM-based compile-time instrumentation.</p>
538
539</div>
540
541<!--=========================================================================-->
Bill Wendling8a924c62011-10-26 07:42:45 +0000[diff] [blame]542<h3>The ZooLib C++ Cross-Platform Application Framework</h3>
543
544<div>
545
546<p><a href="http://www.zoolib.org/">ZooLib</a> is Open Source under the MIT
547 License. It provides GUI, filesystem access, TCP networking, thread-safe
548 memory management, threading and locking for Mac OS X, Classic Mac OS,
549 Microsoft Windows, POSIX operating systems with X11, BeOS, Haiku, Apple's iOS
550 and Research in Motion's BlackBerry.</p>
551
552<p>My current work is to use CLang's static analyzer to improve ZooLib's code
553 quality. I also plan to set up LLVM compiles of the demo programs and test
554 programs using CLang and LLVM on all the platforms that CLang, LLVM and
555 ZooLib all support.</p>
556
557</div>
558
559<!--=========================================================================-->
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]560<!--
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]561<h3>PinaVM</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]562
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]563<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]564<p><a href="http://gitorious.org/pinavm/pages/Home">PinaVM</a> is an open
565source, <a href="http://www.systemc.org/">SystemC</a> front-end. Unlike many
566other front-ends, PinaVM actually executes the elaboration of the
567program analyzed using LLVM's JIT infrastructure. It later enriches the
568bitcode with SystemC-specific information.</p>
569</div>
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]570-->
571
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]572
573<!--=========================================================================-->
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]574<!--
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]575<h3 id="icedtea">IcedTea Java Virtual Machine Implementation</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]576
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]577<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]578<p>
579<a href="http://icedtea.classpath.org/wiki/Main_Page">IcedTea</a> provides a
580harness to build OpenJDK using only free software build tools and to provide
581replacements for the not-yet free parts of OpenJDK. One of the extensions that
582IcedTea provides is a new JIT compiler named <a
583href="http://icedtea.classpath.org/wiki/ZeroSharkFaq">Shark</a> which uses LLVM
584to provide native code generation without introducing processor-dependent
585code.
586</p>
587
588<p> OpenJDK 7 b112, IcedTea6 1.9 and IcedTea7 1.13 and later have been tested
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]589and are known to work with LLVM 3.0 (and continue to work with older LLVM
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]590releases &gt;= 2.6 as well).</p>
591</div>
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]592-->
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]593
594<!--=========================================================================-->
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]595<!--
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]596<h3>Polly - Polyhedral optimizations for LLVM</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]597
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]598<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]599<p>Polly is a project that aims to provide advanced memory access optimizations
600to better take advantage of SIMD units, cache hierarchies, multiple cores or
601even vector accelerators for LLVM. Built around an abstract mathematical
602description based on Z-polyhedra, it provides the infrastructure to develop
603advanced optimizations in LLVM and to connect complex external optimizers. In
604its first year of existence Polly already provides an exact value-based
605dependency analysis as well as basic SIMD and OpenMP code generation support.
606Furthermore, Polly can use PoCC(Pluto) an advanced optimizer for data-locality
607and parallelism.</p>
608</div>
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]609-->
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]610
Chris Lattner0fa5da92011-04-06 16:14:25 +0000[diff] [blame]611<!--=========================================================================-->
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]612<!--
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]613<h3>Rubinius</h3>
Chris Lattner0fa5da92011-04-06 16:14:25 +0000[diff] [blame]614
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]615<div>
Chris Lattner0fa5da92011-04-06 16:14:25 +0000[diff] [blame]616 <p><a href="http://github.com/evanphx/rubinius">Rubinius</a> is an environment
617 for running Ruby code which strives to write as much of the implementation in
618 Ruby as possible. Combined with a bytecode interpreting VM, it uses LLVM to
619 optimize and compile ruby code down to machine code. Techniques such as type
620 feedback, method inlining, and deoptimization are all used to remove dynamism
621 from ruby execution and increase performance.</p>
622</div>
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]623-->
Chris Lattner0fa5da92011-04-06 16:14:25 +0000[diff] [blame]624
Chris Lattnera844a3e2011-04-07 03:09:21 +0000[diff] [blame]625<!--=========================================================================-->
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]626<!--
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]627<h3>
Chris Lattnera844a3e2011-04-07 03:09:21 +0000[diff] [blame]628<a name="FAUST">FAUST Real-Time Audio Signal Processing Language</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]629</h3>
Chris Lattnere0518442010-10-01 06:34:49 +0000[diff] [blame]630
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]631<div>
Chris Lattnera844a3e2011-04-07 03:09:21 +0000[diff] [blame]632<p>
633<a href="http://faust.grame.fr">FAUST</a> is a compiled language for real-time
634audio signal processing. The name FAUST stands for Functional AUdio STream. Its
635programming model combines two approaches: functional programming and block
636diagram composition. In addition with the C, C++, JAVA output formats, the
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]637Faust compiler can now generate LLVM bitcode, and works with LLVM 2.7-3.0.</p>
Chris Lattnera844a3e2011-04-07 03:09:21 +0000[diff] [blame]638
639</div>
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]640-->
Chris Lattnera844a3e2011-04-07 03:09:21 +0000[diff] [blame]641
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]642</div>
643
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]644<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]645<h2>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]646 <a name="whatsnew">What's New in LLVM 3.0?</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]647</h2>
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]648<!-- *********************************************************************** -->
649
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]650<div>
Chris Lattnerf8e0b4e2008-06-08 22:59:35 +0000[diff] [blame]651
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]652<p>This release includes a huge number of bug fixes, performance tweaks and
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]653 minor improvements. Some of the major improvements and new features are
654 listed in this section.</p>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]655
Chris Lattner914ce462010-04-22 06:28:20 +0000[diff] [blame]656<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]657<h3>
Chris Lattner252b83d2008-02-06 18:00:06 +0000[diff] [blame]658<a name="majorfeatures">Major New Features</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]659</h3>
Chris Lattner252b83d2008-02-06 18:00:06 +0000[diff] [blame]660
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]661<div>
Chris Lattner252b83d2008-02-06 18:00:06 +0000[diff] [blame]662
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]663<p>LLVM 3.0 includes several major new capabilities:</p>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]664
665<ul>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]666
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]667<!--
668<li></li>
669-->
Chris Lattner7a8e6c52011-04-05 18:38:45 +0000[diff] [blame]670
Chris Lattner8170c102008-02-10 08:18:42 +0000[diff] [blame]671</ul>
Chris Lattner0a6f6d52011-04-05 07:19:28 +0000[diff] [blame]672
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]673</div>
674
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]675<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]676<h3>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]677<a name="coreimprovements">LLVM IR and Core Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]678</h3>
Chris Lattnerf304ffc2008-02-10 08:17:19 +0000[diff] [blame]679
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]680<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]681
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]682<p>LLVM IR has several new features for better support of new targets and that
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]683 expose new optimization opportunities:</p>
Chris Lattnerf304ffc2008-02-10 08:17:19 +0000[diff] [blame]684
Bill Wendlingbc5f6dd2011-10-26 18:33:01 +0000[diff] [blame]685<p>One of the biggest changes is that 3.0 has a new exception handling
686 system. The old system used LLVM intrinsics to convey the exception handling
687 information to the code generator. It worked in most cases, but not
688 all. Inlining was especially difficult to get right. Also, the intrinsics
689 could be moved away from the <code>invoke</code> instruction, making it hard
690 to recover that information.</p>
691
692<p>The new EH system makes exception handling a first-class member of the IR. It
693 adds two new instructions:</p>
694
Chris Lattner791f77b2008-06-05 06:25:56 +0000[diff] [blame]695<ul>
Bill Wendlingbc5f6dd2011-10-26 18:33:01 +0000[diff] [blame]696 <li><a href="LangRef.html#i_landingpad"><code>landingpad</code></a> &mdash;
697 this instruction defines a landing pad basic block. It contains all of the
698 information that's needed by the code generator. It's also required to be
699 the first non-PHI instruction in the landing pad. In addition, a landing
700 pad may be jumped to only by the unwind edge of an <code>invoke</code>
701 instruction.</li>
702
703 <li><a href="LangRef.html#i_resume"><code>resume</code></a> &mdash; this
704 instruction causes the current exception to resume traveling up the
705 stack. It replaces the <code>@llvm.eh.resume</code> intrinsic.</li>
Chris Lattnerf304ffc2008-02-10 08:17:19 +0000[diff] [blame]706</ul>
Mikhail Glushenkovea65d7d2008-10-13 02:08:34 +0000[diff] [blame]707
Bill Wendlingbc5f6dd2011-10-26 18:33:01 +0000[diff] [blame]708<p>Converting from the old EH API to the new EH API is rather simple, because a
709 lot of complexity has been removed. The two intrinsics,
710 <code>@llvm.eh.exception</code> and <code>@llvm.eh.selector</code> have been
711 superceded by the <code>landingpad</code> instruction. Instead of generating
712 a call to <code>@llvm.eh.exception</code> and <code>@llvm.eh.selector</code>:
713
714<div class="doc_code">
715<pre>
716Function *ExcIntr = Intrinsic::getDeclaration(TheModule,
717 Intrinsic::eh_exception);
718Function *SlctrIntr = Intrinsic::getDeclaration(TheModule,
719 Intrinsic::eh_selector);
720
721// The exception pointer.
722Value *ExnPtr = Builder.CreateCall(ExcIntr, "exc_ptr");
723
724std::vector&lt;Value*&gt; Args;
725Args.push_back(ExnPtr);
726Args.push_back(Builder.CreateBitCast(Personality,
727 Type::getInt8PtrTy(Context)));
728
729<i>// Add selector clauses to Args.</i>
730
731// The selector call.
732Builder.CreateCall(SlctrIntr, Args, "exc_sel");
733</pre>
734</div>
735
736<p>You should instead generate a <code>landingpad</code> instruction, that
737 returns an exception object and selector value:</p>
738
739<div class="doc_code">
740<pre>
741LandingPadInst *LPadInst =
742 Builder.CreateLandingPad(StructType::get(Int8PtrTy, Int32Ty, NULL),
743 Personality, 0);
744
745Value *LPadExn = Builder.CreateExtractValue(LPadInst, 0);
746Builder.CreateStore(LPadExn, getExceptionSlot());
747
748Value *LPadSel = Builder.CreateExtractValue(LPadInst, 1);
749Builder.CreateStore(LPadSel, getEHSelectorSlot());
750</pre>
751</div>
752
753<p>It's now trivial to add the individual clauses to the <code>landingpad</code>
754 instruction.</p>
755
756<div class="doc_code">
757<pre>
758<i><b>// Adding a catch clause</b></i>
759Constant *TypeInfo = getTypeInfo();
760LPadInst-&gt;addClause(TypeInfo);
761
762<i><b>// Adding a C++ catch-all</b></i>
763LPadInst-&gt;addClause(Constant::getNullValue(Builder.getInt8PtrTy()));
764
765<i><b>// Adding a cleanup</b></i>
766LPadInst-&gt;setCleanup(true);
767
768<i><b>// Adding a filter clause</b></i>
769std::vector&lt;Constant*&gt; TypeInfos;
770Constant *TypeInfo = getFilterTypeInfo();
771TypeInfos.push_back(Builder.CreateBitCast(TypeInfo, Builder.getInt8PtrTy()));
772
773ArrayType *FilterTy = ArrayType::get(Int8PtrTy, TypeInfos.size());
774LPadInst-&gt;addClause(ConstantArray::get(FilterTy, TypeInfos));
775</pre>
776</div>
777
778<p>Converting from using the <code>@llvm.eh.resume</code> intrinsic to
779 the <code>resume</code> instruction is trivial. It takes the exception
780 pointer and exception selector values returned by
781 the <code>landingpad</code> instruction:</p>
782
783<div class="doc_code">
784<pre>
785Type *UnwindDataTy = StructType::get(Builder.getInt8PtrTy(),
786 Builder.getInt32Ty(), NULL);
787Value *UnwindData = UndefValue::get(UnwindDataTy);
788Value *ExcPtr = Builder.CreateLoad(getExceptionObjSlot());
789Value *ExcSel = Builder.CreateLoad(getExceptionSelSlot());
790UnwindData = Builder.CreateInsertValue(UnwindData, ExcPtr, 0, "exc_ptr");
791UnwindData = Builder.CreateInsertValue(UnwindData, ExcSel, 1, "exc_sel");
792Builder.CreateResume(UnwindData);
793</pre>
794</div>
795
Chris Lattnerf304ffc2008-02-10 08:17:19 +0000[diff] [blame]796</div>
797
798<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]799<h3>
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]800<a name="optimizer">Optimizer Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]801</h3>
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]802
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]803<div>
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]804
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]805<p>In addition to a large array of minor performance tweaks and bug fixes, this
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]806 release includes a few major enhancements and additions to the
807 optimizers:</p>
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]808
809<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]810<!--
811<li></li>
812-->
Chris Lattnerc5ac61d2011-04-06 05:50:04 +0000[diff] [blame]813</li>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]814
Chris Lattner11b66112010-10-04 02:42:39 +0000[diff] [blame]815</ul>
816
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]817</div>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]818
Chris Lattner0b832202008-06-08 02:45:07 +0000[diff] [blame]819<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]820<h3>
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]821<a name="mc">MC Level Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]822</h3>
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]823
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]824<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]825
826<p>The LLVM Machine Code (aka MC) subsystem was created to solve a number of
827 problems in the realm of assembly, disassembly, object file format handling,
828 and a number of other related areas that CPU instruction-set level tools work
829 in.</p>
Chris Lattner7d9b6b42010-10-02 21:59:30 +0000[diff] [blame]830
Chris Lattner7d9b6b42010-10-02 21:59:30 +0000[diff] [blame]831<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]832<!--
833<li></li>
834-->
Chris Lattner7d9b6b42010-10-02 21:59:30 +0000[diff] [blame]835</ul>
836
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]837<p>For more information, please see
838 the <a href="http://blog.llvm.org/2010/04/intro-to-llvm-mc-project.html">Intro
839 to the LLVM MC Project Blog Post</a>.</p>
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]840
NAKAMURA Takumi45c435a2011-04-05 08:24:22 +0000[diff] [blame]841</div>
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]842
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]843<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]844<h3>
Chris Lattner511433e2009-03-02 03:24:11 +0000[diff] [blame]845<a name="codegen">Target Independent Code Generator Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]846</h3>
Chris Lattner0b832202008-06-08 02:45:07 +0000[diff] [blame]847
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]848<div>
Chris Lattner0b832202008-06-08 02:45:07 +0000[diff] [blame]849
Mikhail Glushenkovf795ef02009-03-01 18:09:47 +0000[diff] [blame]850<p>We have put a significant amount of work into the code generator
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]851 infrastructure, which allows us to implement more aggressive algorithms and
852 make it run faster:</p>
Chris Lattner0b832202008-06-08 02:45:07 +0000[diff] [blame]853
854<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]855<!--
856<li></li>
857-->
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]858</ul>
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]859</div>
860
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]861<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]862<h3>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]863<a name="x86">X86-32 and X86-64 Target Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]864</h3>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]865
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]866<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]867
868<p>New features and major changes in the X86 target include:</p>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]869
870<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]871
872 <li>The CRC32 intrinsics have been renamed. The intrinsics were previously
873 <code>@llvm.x86.sse42.crc32.[8|16|32]</code>
874 and <code>@llvm.x86.sse42.crc64.[8|64]</code>. They have been renamed to
875 <code>@llvm.x86.sse42.crc32.32.[8|16|32]</code> and
876 <code>@llvm.x86.sse42.crc32.64.[8|64]</code>.</li>
Chad Rosierf94c9c12011-05-27 20:13:10 +0000[diff] [blame]877
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]878</ul>
879
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]880</div>
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]881
882<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]883<h3>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]884<a name="ARM">ARM Target Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]885</h3>
Chris Lattnerc441fb82009-03-01 02:30:21 +0000[diff] [blame]886
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]887<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]888
889<p>New features of the ARM target include:</p>
Chris Lattnerc441fb82009-03-01 02:30:21 +0000[diff] [blame]890
891<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]892<!--
893<li></li>
894-->
Bob Wilsone8472772010-09-13 17:39:35 +0000[diff] [blame]895</ul>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]896</div>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]897
898<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]899<h3>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]900<a name="OtherTS">Other Target Specific Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]901</h3>
Chris Lattnerc441fb82009-03-01 02:30:21 +0000[diff] [blame]902
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]903<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]904
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]905<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]906<!--
907<li></li>
908-->
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]909</ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]910
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]911</div>
Chris Lattner77d29b12008-06-05 08:02:49 +0000[diff] [blame]912
913<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]914<h3>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]915<a name="changes">Major Changes and Removed Features</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]916</h3>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]917
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]918<div>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]919
Bill Wendling2626dba2011-08-03 22:18:20 +0000[diff] [blame]920<p>If you're already an LLVM user or developer with out-of-tree changes based on
921 LLVM 2.9, this section lists some "gotchas" that you may run into upgrading
922 from the previous release.</p>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]923
924<ul>
Eric Christopher90d6ec52011-09-28 19:47:28 +0000[diff] [blame]925 <li>The <code>LLVMC</code> front end code was removed while separating
926 out language independence.</li>
Jay Foadf42e9b22011-08-04 10:43:43 +0000[diff] [blame]927 <li>The <code>LowerSetJmp</code> pass wasn't used effectively by any
928 target and has been removed.</li>
Rafael Espindolaf940a1a2011-08-30 23:03:45 +0000[diff] [blame]929 <li>The old <code>TailDup</code> pass was not used in the standard pipeline
930 and was unable to update ssa form, so it has been removed.
Eli Friedmanf03bb262011-08-12 22:50:01 +0000[diff] [blame]931 <li>The syntax of volatile loads and stores in IR has been changed to
932 "<code>load volatile</code>"/"<code>store volatile</code>". The old
933 syntax ("<code>volatile load</code>"/"<code>volatile store</code>")
934 is still accepted, but is now considered deprecated.</li>
Eli Friedman526e1bb2011-10-26 00:55:23 +0000[diff] [blame]935 <li>The old atomic intrinscs (<code>llvm.memory.barrier</code> and
936 <code>llvm.atomic.*</code>) are now gone. Please use the new atomic
937 instructions, described in the <a href="Atomics.html">atomics guide</a>.
Devang Patelb34dd132008-10-14 20:03:43 +0000[diff] [blame]938</ul>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]939
NAKAMURA Takumi2026de22011-08-22 23:22:05 +0000[diff] [blame]940<h4>Windows (32-bit)</h4>
941<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]942
NAKAMURA Takumi2026de22011-08-22 23:22:05 +0000[diff] [blame]943<ul>
944 <li>On Win32(MinGW32 and MSVC), Windows 2000 will not be supported.
945 Windows XP or higher is required.</li>
946</ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]947
NAKAMURA Takumi2026de22011-08-22 23:22:05 +0000[diff] [blame]948</div>
949
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]950</div>
951
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]952<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]953<h3>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]954<a name="api_changes">Internal API Changes</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]955</h3>
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]956
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]957<div>
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]958
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]959<p>In addition, many APIs have changed in this release. Some of the major
Bill Wendling16005252011-08-02 06:20:17 +0000[diff] [blame]960 LLVM API changes are:</p>
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]961
962<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]963 <li>The biggest and most pervasive change is that llvm::Type's are no longer
964 returned or accepted as 'const' values. Instead, just pass around
965 non-const Type's.</li>
Chris Lattnerd1324302011-07-18 04:56:02 +0000[diff] [blame]966
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]967 <li><code>PHINode::reserveOperandSpace</code> has been removed. Instead, you
968 must specify how many operands to reserve space for when you create the
969 PHINode, by passing an extra argument
970 into <code>PHINode::Create</code>.</li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]971
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]972 <li>PHINodes no longer store their incoming BasicBlocks as operands. Instead,
973 the list of incoming BasicBlocks is stored separately, and can be accessed
974 with new functions <code>PHINode::block_begin</code>
975 and <code>PHINode::block_end</code>.</li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]976
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]977 <li>Various functions now take an <code>ArrayRef</code> instead of either a
978 pair of pointers (or iterators) to the beginning and end of a range, or a
979 pointer and a length. Others now return an <code>ArrayRef</code> instead
980 of a reference to a <code>SmallVector</code>
981 or <code>std::vector</code>. These include:
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]982<ul>
983<!-- Please keep this list sorted. -->
Jay Foada3efbb12011-07-15 08:37:34 +0000[diff] [blame]984<li><code>CallInst::Create</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]985<li><code>ComputeLinearIndex</code> (in <code>llvm/CodeGen/Analysis.h</code>)</li>
986<li><code>ConstantArray::get</code></li>
987<li><code>ConstantExpr::getExtractElement</code></li>
Jay Foaddab3d292011-07-21 14:31:17 +0000[diff] [blame]988<li><code>ConstantExpr::getGetElementPtr</code></li>
989<li><code>ConstantExpr::getInBoundsGetElementPtr</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]990<li><code>ConstantExpr::getIndices</code></li>
991<li><code>ConstantExpr::getInsertElement</code></li>
992<li><code>ConstantExpr::getWithOperands</code></li>
Jay Foad1d2f5692011-07-19 13:32:40 +0000[diff] [blame]993<li><code>ConstantFoldCall</code> (in <code>llvm/Analysis/ConstantFolding.h</code>)</li>
994<li><code>ConstantFoldInstOperands</code> (in <code>llvm/Analysis/ConstantFolding.h</code>)</li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]995<li><code>ConstantVector::get</code></li>
996<li><code>DIBuilder::createComplexVariable</code></li>
997<li><code>DIBuilder::getOrCreateArray</code></li>
998<li><code>ExtractValueInst::Create</code></li>
999<li><code>ExtractValueInst::getIndexedType</code></li>
1000<li><code>ExtractValueInst::getIndices</code></li>
1001<li><code>FindInsertedValue</code> (in <code>llvm/Analysis/ValueTracking.h</code>)</li>
Jay Foadca12a212011-07-19 14:42:50 +0000[diff] [blame]1002<li><code>gep_type_begin</code> (in <code>llvm/Support/GetElementPtrTypeIterator.h</code>)</li>
1003<li><code>gep_type_end</code> (in <code>llvm/Support/GetElementPtrTypeIterator.h</code>)</li>
Jay Foada9203102011-07-25 09:48:08 +0000[diff] [blame]1004<li><code>GetElementPtrInst::Create</code></li>
1005<li><code>GetElementPtrInst::CreateInBounds</code></li>
1006<li><code>GetElementPtrInst::getIndexedType</code></li>
Jay Foadb60e8512011-07-21 14:42:51 +0000[diff] [blame]1007<li><code>InsertValueInst::Create</code></li>
1008<li><code>InsertValueInst::getIndices</code></li>
1009<li><code>InvokeInst::Create</code></li>
Jay Foada3efbb12011-07-15 08:37:34 +0000[diff] [blame]1010<li><code>IRBuilder::CreateCall</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1011<li><code>IRBuilder::CreateExtractValue</code></li>
Jay Foad0a2a60a2011-07-22 08:16:57 +0000[diff] [blame]1012<li><code>IRBuilder::CreateGEP</code></li>
1013<li><code>IRBuilder::CreateInBoundsGEP</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1014<li><code>IRBuilder::CreateInsertValue</code></li>
Jay Foada3efbb12011-07-15 08:37:34 +0000[diff] [blame]1015<li><code>IRBuilder::CreateInvoke</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1016<li><code>MDNode::get</code></li>
1017<li><code>MDNode::getIfExists</code></li>
1018<li><code>MDNode::getTemporary</code></li>
1019<li><code>MDNode::getWhenValsUnresolved</code></li>
Jay Foadb9b54eb2011-07-19 15:07:52 +0000[diff] [blame]1020<li><code>SimplifyGEPInst</code> (in <code>llvm/Analysis/InstructionSimplify.h</code>)</li>
Jay Foad8fbbb392011-07-19 14:01:37 +0000[diff] [blame]1021<li><code>TargetData::getIndexedOffset</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1022</ul></li>
1023
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1024 <li>All forms of <code>StringMap::getOrCreateValue</code> have been remove
1025 except for the one which takes a <code>StringRef</code>.</li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1026
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1027 <li>The <code>LLVMBuildUnwind</code> function from the C API was removed. The
1028 LLVM <code>unwind</code> instruction has been deprecated for a long time
1029 and isn't used by the current front-ends. So this was removed during the
1030 exception handling rewrite.</li>
Bill Wendling16005252011-08-02 06:20:17 +0000[diff] [blame]1031
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1032 <li>The <code>LLVMAddLowerSetJmpPass</code> function from the C API was
1033 removed because the <code>LowerSetJmp</code> pass was removed.</li>
Bill Wendling2626dba2011-08-03 22:18:20 +0000[diff] [blame]1034
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1035 <li>The <code>DIBuilder</code> interface used by front ends to encode
1036 debugging information in the LLVM IR now expects clients to
1037 use <code>DIBuilder::finalize()</code> at the end of translation unit to
1038 complete debugging information encoding.</li>
Devang Patel6326a422011-08-15 23:00:00 +0000[diff] [blame]1039
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1040 <li>The way the type system works has been
1041 rewritten: <code>PATypeHolder</code> and <code>OpaqueType</code> are gone,
1042 and all APIs deal with <code>Type*</code> instead of <code>const
1043 Type*</code>. If you need to create recursive structures, then create a
1044 named structure, and use <code>setBody()</code> when all its elements are
1045 built. Type merging and refining is gone too: named structures are not
1046 merged with other structures, even if their layout is identical. (of
1047 course anonymous structures are still uniqued by layout).</li>
Torok Edwinf16e2d42011-09-30 13:07:52 +0000[diff] [blame]1048
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1049 <li>TargetSelect.h moved to Support/ from Target/</li>
Torok Edwinf16e2d42011-09-30 13:07:52 +0000[diff] [blame]1050
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1051 <li>UpgradeIntrinsicCall no longer upgrades pre-2.9 intrinsic calls (for
1052 example <code>llvm.memset.i32</code>).</li>
Torok Edwinf16e2d42011-09-30 13:07:52 +0000[diff] [blame]1053
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1054 <li>It is mandatory to initialize all out-of-tree passes too and their dependencies now with
1055 <code>INITIALIZE_PASS{BEGIN,END,}</code>
1056 and <code>INITIALIZE_{PASS,AG}_DEPENDENCY</code>.</li>
Torok Edwinf16e2d42011-09-30 13:07:52 +0000[diff] [blame]1057
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1058 <li>The interface for MemDepResult in MemoryDependenceAnalysis has been
1059 enhanced with new return types Unknown and NonFuncLocal, in addition to
1060 the existing types Clobber, Def, and NonLocal.</li>
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]1061</ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1062
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]1063</div>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]1064
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1065</div>
1066
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1067<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1068<h2>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1069 <a name="knownproblems">Known Problems</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1070</h2>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1071<!-- *********************************************************************** -->
1072
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1073<div>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1074
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1075<p>This section contains significant known problems with the LLVM system, listed
1076 by component. If you run into a problem, please check
1077 the <a href="http://llvm.org/bugs/">LLVM bug database</a> and submit a bug if
1078 there isn't already one.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1079
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]1080<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1081<h3>
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]1082 <a name="experimental">Experimental features included with this release</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1083</h3>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1084
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1085<div>
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]1086
Misha Brukman6df9e2c2004-05-12 21:46:05 +0000[diff] [blame]1087<p>The following components of this LLVM release are either untested, known to
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1088 be broken or unreliable, or are in early development. These components
1089 should not be relied on, and bugs should not be filed against them, but they
1090 may be useful to some people. In particular, if you would like to work on
1091 one of these components, please contact us on
1092 the <a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVMdev
1093 list</a>.</p>
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]1094
1095<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1096 <li>The Alpha, Blackfin, CellSPU, MicroBlaze, MSP430, MIPS, PTX, SystemZ and
1097 XCore backends are experimental.</li>
1098
1099 <li><tt>llc</tt> "<tt>-filetype=obj</tt>" is experimental on all targets other
1100 than darwin and ELF X86 systems.</li>
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]1101</ul>
1102
1103</div>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1104
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1105<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1106<h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1107 <a name="x86-be">Known problems with the X86 back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1108</h3>
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]1109
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1110<div>
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]1111
1112<ul>
Anton Korobeynikova6094be2008-06-08 10:24:13 +0000[diff] [blame]1113 <li>The X86 backend does not yet support
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1114 all <a href="http://llvm.org/PR879">inline assembly that uses the X86
1115 floating point stack</a>. It supports the 'f' and 't' constraints, but
1116 not 'u'.</li>
1117
Dan Gohman8207ba92008-06-08 23:05:11 +0000[diff] [blame]1118 <li>The X86-64 backend does not yet support the LLVM IR instruction
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1119 <tt>va_arg</tt>. Currently, front-ends support variadic argument
1120 constructs on X86-64 by lowering them manually.</li>
1121
NAKAMURA Takumi45c435a2011-04-05 08:24:22 +0000[diff] [blame]1122 <li>Windows x64 (aka Win64) code generator has a few issues.
1123 <ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1124 <li>llvm-gcc cannot build the mingw-w64 runtime currently due to lack of
1125 support for the 'u' inline assembly constraint and for X87 floating
1126 point inline assembly.</li>
1127
1128 <li>On mingw-w64, you will see unresolved symbol <tt>__chkstk</tt> due
1129 to <a href="http://llvm.org/bugs/show_bug.cgi?id=8919">Bug 8919</a>.
1130 It is fixed
1131 in <a href="http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20110321/118499.html">r128206</a>.</li>
1132
NAKAMURA Takumi45c435a2011-04-05 08:24:22 +0000[diff] [blame]1133 <li>Miss-aligned MOVDQA might crash your program. It is due to
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1134 <a href="http://llvm.org/bugs/show_bug.cgi?id=9483">Bug 9483</a>, lack
1135 of handling aligned internal globals.</li>
NAKAMURA Takumi45c435a2011-04-05 08:24:22 +0000[diff] [blame]1136 </ul>
1137 </li>
1138
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1139</ul>
1140
1141</div>
1142
1143<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1144<h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1145 <a name="ppc-be">Known problems with the PowerPC back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1146</h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1147
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1148<div>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1149
1150<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1151 <li>The Linux PPC32/ABI support needs testing for the interpreter and static
1152 compilation, and lacks support for debug information.</li>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1153</ul>
1154
1155</div>
1156
1157<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1158<h3>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]1159 <a name="arm-be">Known problems with the ARM back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1160</h3>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]1161
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1162<div>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]1163
1164<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1165 <li>Thumb mode works only on ARMv6 or higher processors. On sub-ARMv6
1166 processors, thumb programs can crash or produce wrong results
1167 (<a href="http://llvm.org/PR1388">PR1388</a>).</li>
1168
1169 <li>Compilation for ARM Linux OABI (old ABI) is supported but not fully
1170 tested.</li>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]1171</ul>
1172
1173</div>
1174
1175<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1176<h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1177 <a name="sparc-be">Known problems with the SPARC back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1178</h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1179
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1180<div>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1181
1182<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1183 <li>The SPARC backend only supports the 32-bit SPARC ABI (-m32); it does not
1184 support the 64-bit SPARC ABI (-m64).</li>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1185</ul>
1186
1187</div>
1188
1189<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1190<h3>
Bruno Cardoso Lopesb7e1a4f2008-10-25 14:56:26 +0000[diff] [blame]1191 <a name="mips-be">Known problems with the MIPS back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1192</h3>
Bruno Cardoso Lopesb7e1a4f2008-10-25 14:56:26 +0000[diff] [blame]1193
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1194<div>
Bruno Cardoso Lopesb7e1a4f2008-10-25 14:56:26 +0000[diff] [blame]1195
1196<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1197 <li>64-bit MIPS targets are not supported yet.</li>
Bruno Cardoso Lopesb7e1a4f2008-10-25 14:56:26 +0000[diff] [blame]1198</ul>
1199
1200</div>
1201
1202<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1203<h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1204 <a name="alpha-be">Known problems with the Alpha back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1205</h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1206
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1207<div>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1208
1209<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1210 <li>On 21164s, some rare FP arithmetic sequences which may trap do not have
1211 the appropriate nops inserted to ensure restartability.</li>
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]1212</ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1213
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]1214</div>
1215
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1216<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1217<h3>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]1218 <a name="c-be">Known problems with the C back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1219</h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1220
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1221<div>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1222
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]1223<p>The C backend has numerous problems and is not being actively maintained.
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1224 Depending on it for anything serious is not advised.</p>
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]1225
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1226<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1227 <li><a href="http://llvm.org/PR802">The C backend has only basic support for
1228 inline assembly code</a>.</li>
1229
1230 <li><a href="http://llvm.org/PR1658">The C backend violates the ABI of common
1231 C++ programs</a>, preventing intermixing between C++ compiled by the CBE
1232 and C++ code compiled with <tt>llc</tt> or native compilers.</li>
1233
1234 <li>The C backend does not support all exception handling constructs.</li>
1235
1236 <li>The C backend does not support arbitrary precision integers.</li>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1237</ul>
1238
1239</div>
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]1240
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1241
1242<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1243<h3>
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]1244 <a name="llvm-gcc">Known problems with the llvm-gcc front-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1245</h3>
Chris Lattner47588f92003-10-02 05:07:23 +0000[diff] [blame]1246
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1247<div>
Chris Lattnerc5d658a2006-03-03 00:34:26 +0000[diff] [blame]1248
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1249<p><b>LLVM 2.9 was the last release of llvm-gcc.</b></p>
Chris Lattner49123fd2011-04-06 06:29:50 +0000[diff] [blame]1250
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]1251<p>llvm-gcc is generally very stable for the C family of languages. The only
1252 major language feature of GCC not supported by llvm-gcc is the
1253 <tt>__builtin_apply</tt> family of builtins. However, some extensions
1254 are only supported on some targets. For example, trampolines are only
1255 supported on some targets (these are used when you take the address of a
1256 nested function).</p>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1257
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]1258<p>Fortran support generally works, but there are still several unresolved bugs
1259 in <a href="http://llvm.org/bugs/">Bugzilla</a>. Please see the
1260 tools/gfortran component for details. Note that llvm-gcc is missing major
1261 Fortran performance work in the frontend and library that went into GCC after
1262 4.2. If you are interested in Fortran, we recommend that you consider using
1263 <a href="#dragonegg">dragonegg</a> instead.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1264
Duncan Sands3af96332010-10-04 10:06:56 +0000[diff] [blame]1265<p>The llvm-gcc 4.2 Ada compiler has basic functionality, but is no longer being
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1266 actively maintained. If you are interested in Ada, we recommend that you
1267 consider using <a href="#dragonegg">dragonegg</a> instead.</p>
1268
Chris Lattner2b659ef2008-02-12 06:29:45 +0000[diff] [blame]1269</div>
1270
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1271</div>
1272
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1273<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1274<h2>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1275 <a name="additionalinfo">Additional Information</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1276</h2>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1277<!-- *********************************************************************** -->
1278
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1279<div>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1280
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1281<p>A wide variety of additional information is available on
1282 the <a href="http://llvm.org/">LLVM web page</a>, in particular in
1283 the <a href="http://llvm.org/docs/">documentation</a> section. The web page
1284 also contains versions of the API documentation which is up-to-date with the
1285 Subversion version of the source code. You can access versions of these
1286 documents specific to this release by going into the "<tt>llvm/doc/</tt>"
1287 directory in the LLVM tree.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1288
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1289<p>If you have any questions or comments about LLVM, please feel free to contact
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame^]1290 us via the <a href="http://llvm.org/docs/#maillist"> mailing lists</a>.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1291
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1292</div>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1293
1294<!-- *********************************************************************** -->
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1295
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