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gerrit-public.fairphone.software / fp2-dev / platform / external / llvm / 90d6ec5f14c573f44efa490f3c118831628e9124 / . / 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
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]47Infrastructure, release 3.0. Here we describe the status of LLVM, including
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]48major improvements from the previous release and significant known problems.
Mikhail Glushenkovf795ef02009-03-01 18:09:47 +0000[diff] [blame]49All LLVM releases may be downloaded from the <a
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]50href="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
Chris Lattnerc463b272005-10-29 07:07:09 +0000[diff] [blame]53release, please check out the <a href="http://llvm.org/">main LLVM
Chris Lattner47ad72c2003-10-07 21:38:31 +0000[diff] [blame]54web site</a>. If you have questions or comments, the <a
Chris Lattnerc66bfef2010-03-17 04:41:49 +0000[diff] [blame]55href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVM Developer's
56Mailing List</a> is a good place to send them.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]57
Mikhail Glushenkovea65d7d2008-10-13 02:08:34 +0000[diff] [blame]58<p>Note that if you are reading this file from a Subversion checkout or the
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]59main LLVM web page, this document applies to the <i>next</i> release, not the
Gabor Greiffa933f82008-10-14 11:00:32 +0000[diff] [blame]60current one. To see the release notes for a specific release, please see the
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]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>
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]81<p>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]82The LLVM 3.0 distribution currently consists of code from the core LLVM
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]83repository (which roughly includes the LLVM optimizers, code generators
84and supporting tools), the Clang repository and the llvm-gcc repository. In
85addition to this code, the LLVM Project includes other sub-projects that are in
86development. Here we include updates on these subprojects.
Bill Wendling63d8c552009-03-02 04:28:57 +0000[diff] [blame]87</p>
Chris Lattner96a445e2008-10-13 18:01:01 +0000[diff] [blame]88
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]89<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]90<h3>
Chris Lattnerfb97b2d2008-10-13 18:11:54 +0000[diff] [blame]91<a name="clang">Clang: C/C++/Objective-C Frontend Toolkit</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]92</h3>
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]93
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]94<div>
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]95
Chris Lattner095539f2010-04-26 17:42:18 +0000[diff] [blame]96<p><a href="http://clang.llvm.org/">Clang</a> is an LLVM front end for the C,
97C++, and Objective-C languages. Clang aims to provide a better user experience
98through expressive diagnostics, a high level of conformance to language
99standards, fast compilation, and low memory use. Like LLVM, Clang provides a
100modular, library-based architecture that makes it suitable for creating or
101integrating with other development tools. Clang is considered a
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]102production-quality compiler for C, Objective-C, C++ and Objective-C++ on x86
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]103(32- and 64-bit), and for darwin/arm targets.</p>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]104
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]105<p>In the LLVM 3.0 time-frame, the Clang team has made many improvements:</p>
Chris Lattner0a6f6d52011-04-05 07:19:28 +0000[diff] [blame]106
Duncan Sandsf3ba7af2011-04-06 08:07:40 +0000[diff] [blame]107<p>If Clang rejects your code but another compiler accepts it, please take a
Chris Lattner0a6f6d52011-04-05 07:19:28 +0000[diff] [blame]108look at the <a href="http://clang.llvm.org/compatibility.html">language
Duncan Sandsf3ba7af2011-04-06 08:07:40 +0000[diff] [blame]109compatibility</a> guide to make sure this is not intentional or a known issue.
Chris Lattner0a6f6d52011-04-05 07:19:28 +0000[diff] [blame]110</p>
Bill Wendling741748a2008-10-27 09:27:33 +0000[diff] [blame]111
Chris Lattnerfb97b2d2008-10-13 18:11:54 +0000[diff] [blame]112</div>
113
114<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]115<h3>
Duncan Sands528a5102011-04-04 11:09:08 +0000[diff] [blame]116<a name="dragonegg">DragonEgg: GCC front-ends, LLVM back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]117</h3>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]118
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]119<div>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]120<p>
Duncan Sands528a5102011-04-04 11:09:08 +0000[diff] [blame]121<a href="http://dragonegg.llvm.org/">DragonEgg</a> is a
122<a href="http://gcc.gnu.org/wiki/plugins">gcc plugin</a> that replaces GCC's
123optimizers and code generators with LLVM's.
124Currently it requires a patched version of gcc-4.5.
125The plugin can target the x86-32 and x86-64 processor families and has been
126used successfully on the Darwin, FreeBSD and Linux platforms.
127The Ada, C, C++ and Fortran languages work well.
128The plugin is capable of compiling plenty of Obj-C, Obj-C++ and Java but it is
129not known whether the compiled code actually works or not!
Duncan Sands749fd832010-04-02 09:23:15 +0000[diff] [blame]130</p>
131
132<p>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]133The 3.0 release has the following notable changes:
Duncan Sands4b1da2b2010-09-30 17:37:34 +0000[diff] [blame]134<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]135<!--
136<li></li>
137-->
Duncan Sands4b1da2b2010-09-30 17:37:34 +0000[diff] [blame]138</ul>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]139
140</div>
141
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]142<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]143<h3>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]144<a name="compiler-rt">compiler-rt: Compiler Runtime Library</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]145</h3>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]146
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]147<div>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]148<p>
149The new LLVM <a href="http://compiler-rt.llvm.org/">compiler-rt project</a>
150is a simple library that provides an implementation of the low-level
151target-specific hooks required by code generation and other runtime components.
152For example, when compiling for a 32-bit target, converting a double to a 64-bit
153unsigned integer is compiled into a runtime call to the "__fixunsdfdi"
154function. The compiler-rt library provides highly optimized implementations of
155this and other low-level routines (some are 3x faster than the equivalent
156libgcc routines).</p>
157
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]158<p>In the LLVM 3.0 timeframe,</p>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]159
160</div>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]161
162<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]163<h3>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]164<a name="lldb">LLDB: Low Level Debugger</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]165</h3>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]166
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]167<div>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]168<p>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]169<a href="http://lldb.llvm.org/">LLDB</a> is a brand new member of the LLVM
170umbrella of projects. LLDB is a next generation, high-performance debugger. It
171is built as a set of reusable components which highly leverage existing
172libraries in the larger LLVM Project, such as the Clang expression parser, the
173LLVM disassembler and the LLVM JIT.</p>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]174
175<p>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]176LLDB is has advanced by leaps and bounds in the 3.0 timeframe. It is
Chris Lattnerdf448a32011-04-06 00:56:12 +0000[diff] [blame]177dramatically more stable and useful, and includes both a new <a
178href="http://lldb.llvm.org/tutorial.html">tutorial</a> and a <a
179href="http://lldb.llvm.org/lldb-gdb.html">side-by-side comparison with
180GDB</a>.</p>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]181
182</div>
183
184<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]185<h3>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]186<a name="libc++">libc++: C++ Standard Library</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]187</h3>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]188
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]189<div>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]190<p>
Tobias Grossercdce44b2010-10-06 21:07:30 +0000[diff] [blame]191<a href="http://libcxx.llvm.org/">libc++</a> is another new member of the LLVM
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]192family. It is an implementation of the C++ standard library, written from the
193ground up to specifically target the forthcoming C++'0X standard and focus on
194delivering great performance.</p>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]195
196<p>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]197In the LLVM 3.0 timeframe,</p>
Chris Lattner0a6f6d52011-04-05 07:19:28 +0000[diff] [blame]198
Chris Lattner2009c492011-04-06 00:59:18 +0000[diff] [blame]199<p>
200Like compiler_rt, libc++ is now <a href="DeveloperPolicy.html#license">dual
201 licensed</a> under the MIT and UIUC license, allowing it to be used more
202 permissively.
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]203</p>
204
205</div>
206
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]207
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]208<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]209<h3>
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]210<a name="LLBrowse">LLBrowse: IR Browser</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]211</h3>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]212
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]213<div>
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]214<p>
215<a href="http://llvm.org/svn/llvm-project/llbrowse/trunk/doc/LLBrowse.html">
216 LLBrowse</a> is an interactive viewer for LLVM modules. It can load any LLVM
217 module and displays its contents as an expandable tree view, facilitating an
218 easy way to inspect types, functions, global variables, or metadata nodes. It
219 is fully cross-platform, being based on the popular wxWidgets GUI toolkit.
220</p>
221</div>
222
223<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]224<h3>
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]225<a name="vmkit">VMKit</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]226</h3>
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]227
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]228<div>
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]229<p>The <a href="http://vmkit.llvm.org/">VMKit project</a> is an implementation
230 of a Java Virtual Machine (Java VM or JVM) that uses LLVM for static and
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]231 just-in-time compilation. As of LLVM 3.0, VMKit now supports generational
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]232 garbage collectors. The garbage collectors are provided by the MMTk framework,
233 and VMKit can be configured to use one of the numerous implemented collectors
234 of MMTk.
235</p>
236</div>
237
238
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]239<!--=========================================================================-->
Chris Lattner7a8e6c52011-04-05 18:38:45 +0000[diff] [blame]240<!--
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]241<h3>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]242<a name="klee">KLEE: A Symbolic Execution Virtual Machine</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]243</h3>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]244
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]245<div>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]246<p>
247<a href="http://klee.llvm.org/">KLEE</a> is a symbolic execution framework for
248programs in LLVM bitcode form. KLEE tries to symbolically evaluate "all" paths
249through the application and records state transitions that lead to fault
250states. This allows it to construct testcases that lead to faults and can even
251be used to verify some algorithms.
252</p>
253
Chris Lattnerbe2e1b52011-03-10 07:43:44 +0000[diff] [blame]254<p>UPDATE!</p>
Chris Lattner7a8e6c52011-04-05 18:38:45 +0000[diff] [blame]255</div>-->
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]256
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]257</div>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]258
Chris Lattnerab68e9e2009-02-26 22:33:38 +0000[diff] [blame]259<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]260<h2>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]261 <a name="externalproj">External Open Source Projects Using LLVM 3.0</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]262</h2>
Chris Lattnerab68e9e2009-02-26 22:33:38 +0000[diff] [blame]263<!-- *********************************************************************** -->
264
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]265<div>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]266
267<p>An exciting aspect of LLVM is that it is used as an enabling technology for
268 a lot of other language and tools projects. This section lists some of the
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]269 projects that have already been updated to work with LLVM 3.0.</p>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]270
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]271<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]272<h3>Crack Programming Language</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]273
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]274<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]275<p>
276<a href="http://code.google.com/p/crack-language/">Crack</a> aims to provide the
277ease of development of a scripting language with the performance of a compiled
278language. The language derives concepts from C++, Java and Python, incorporating
279object-oriented programming, operator overloading and strong typing.</p>
280</div>
281
282
283<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]284<h3>TTA-based Codesign Environment (TCE)</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]285
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]286<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]287<p>TCE is a toolset for designing application-specific processors (ASP) based on
288the Transport triggered architecture (TTA). The toolset provides a complete
289co-design flow from C/C++ programs down to synthesizable VHDL and parallel
290program binaries. Processor customization points include the register files,
291function units, supported operations, and the interconnection network.</p>
292
293<p>TCE uses Clang and LLVM for C/C++ language support, target independent
294optimizations and also for parts of code generation. It generates new LLVM-based
295code generators "on the fly" for the designed TTA processors and loads them in
296to the compiler backend as runtime libraries to avoid per-target recompilation
297of larger parts of the compiler chain.</p>
298</div>
299
300
301
302<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]303<h3>PinaVM</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]304
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]305<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]306<p><a href="http://gitorious.org/pinavm/pages/Home">PinaVM</a> is an open
307source, <a href="http://www.systemc.org/">SystemC</a> front-end. Unlike many
308other front-ends, PinaVM actually executes the elaboration of the
309program analyzed using LLVM's JIT infrastructure. It later enriches the
310bitcode with SystemC-specific information.</p>
311</div>
312
313<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]314<h3>Pure</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]315
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]316<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]317<p><a href="http://pure-lang.googlecode.com/">Pure</a> is an
318 algebraic/functional
319 programming language based on term rewriting. Programs are collections
320 of equations which are used to evaluate expressions in a symbolic
321 fashion. The interpreter uses LLVM as a backend to JIT-compile Pure
322 programs to fast native code. Pure offers dynamic typing, eager and lazy
323 evaluation, lexical closures, a hygienic macro system (also based on
324 term rewriting), built-in list and matrix support (including list and
325 matrix comprehensions) and an easy-to-use interface to C and other
326 programming languages (including the ability to load LLVM bitcode
327 modules, and inline C, C++, Fortran and Faust code in Pure programs if
328 the corresponding LLVM-enabled compilers are installed).</p>
329
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]330<p>Pure version 0.47 has been tested and is known to work with LLVM 3.0
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]331 (and continues to work with older LLVM releases &gt;= 2.5).</p>
332</div>
333
334<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]335<h3 id="icedtea">IcedTea Java Virtual Machine Implementation</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]336
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]337<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]338<p>
339<a href="http://icedtea.classpath.org/wiki/Main_Page">IcedTea</a> provides a
340harness to build OpenJDK using only free software build tools and to provide
341replacements for the not-yet free parts of OpenJDK. One of the extensions that
342IcedTea provides is a new JIT compiler named <a
343href="http://icedtea.classpath.org/wiki/ZeroSharkFaq">Shark</a> which uses LLVM
344to provide native code generation without introducing processor-dependent
345code.
346</p>
347
348<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]349and 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]350releases &gt;= 2.6 as well).</p>
351</div>
352
353<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]354<h3>Glasgow Haskell Compiler (GHC)</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]355
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]356<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]357<p>GHC is an open source, state-of-the-art programming suite for Haskell,
358a standard lazy functional programming language. It includes an
359optimizing static compiler generating good code for a variety of
360platforms, together with an interactive system for convenient, quick
361development.</p>
362
363<p>In addition to the existing C and native code generators, GHC 7.0 now
364supports an LLVM code generator. GHC supports LLVM 2.7 and later.</p>
365</div>
366
367<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]368<h3>Polly - Polyhedral optimizations for LLVM</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]369
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]370<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]371<p>Polly is a project that aims to provide advanced memory access optimizations
372to better take advantage of SIMD units, cache hierarchies, multiple cores or
373even vector accelerators for LLVM. Built around an abstract mathematical
374description based on Z-polyhedra, it provides the infrastructure to develop
375advanced optimizations in LLVM and to connect complex external optimizers. In
376its first year of existence Polly already provides an exact value-based
377dependency analysis as well as basic SIMD and OpenMP code generation support.
378Furthermore, Polly can use PoCC(Pluto) an advanced optimizer for data-locality
379and parallelism.</p>
380</div>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]381
Chris Lattner0fa5da92011-04-06 16:14:25 +0000[diff] [blame]382<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]383<h3>Rubinius</h3>
Chris Lattner0fa5da92011-04-06 16:14:25 +0000[diff] [blame]384
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]385<div>
Chris Lattner0fa5da92011-04-06 16:14:25 +0000[diff] [blame]386 <p><a href="http://github.com/evanphx/rubinius">Rubinius</a> is an environment
387 for running Ruby code which strives to write as much of the implementation in
388 Ruby as possible. Combined with a bytecode interpreting VM, it uses LLVM to
389 optimize and compile ruby code down to machine code. Techniques such as type
390 feedback, method inlining, and deoptimization are all used to remove dynamism
391 from ruby execution and increase performance.</p>
392</div>
393
394
Chris Lattnera844a3e2011-04-07 03:09:21 +0000[diff] [blame]395<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]396<h3>
Chris Lattnera844a3e2011-04-07 03:09:21 +0000[diff] [blame]397<a name="FAUST">FAUST Real-Time Audio Signal Processing Language</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]398</h3>
Chris Lattnere0518442010-10-01 06:34:49 +0000[diff] [blame]399
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]400<div>
Chris Lattnera844a3e2011-04-07 03:09:21 +0000[diff] [blame]401<p>
402<a href="http://faust.grame.fr">FAUST</a> is a compiled language for real-time
403audio signal processing. The name FAUST stands for Functional AUdio STream. Its
404programming model combines two approaches: functional programming and block
405diagram composition. In addition with the C, C++, JAVA output formats, the
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]406Faust 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]407
408</div>
409
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]410</div>
411
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]412<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]413<h2>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]414 <a name="whatsnew">What's New in LLVM 3.0?</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]415</h2>
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]416<!-- *********************************************************************** -->
417
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]418<div>
Chris Lattnerf8e0b4e2008-06-08 22:59:35 +0000[diff] [blame]419
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]420<p>This release includes a huge number of bug fixes, performance tweaks and
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]421minor improvements. Some of the major improvements and new features are listed
422in this section.
Chris Lattnerf8e0b4e2008-06-08 22:59:35 +0000[diff] [blame]423</p>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]424
Chris Lattner914ce462010-04-22 06:28:20 +0000[diff] [blame]425<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]426<h3>
Chris Lattner252b83d2008-02-06 18:00:06 +0000[diff] [blame]427<a name="majorfeatures">Major New Features</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]428</h3>
Chris Lattner252b83d2008-02-06 18:00:06 +0000[diff] [blame]429
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]430<div>
Chris Lattner252b83d2008-02-06 18:00:06 +0000[diff] [blame]431
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]432<p>LLVM 3.0 includes several major new capabilities:</p>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]433
434<ul>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]435
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]436<!--
437<li></li>
438-->
Chris Lattner7a8e6c52011-04-05 18:38:45 +0000[diff] [blame]439
Chris Lattner8170c102008-02-10 08:18:42 +0000[diff] [blame]440</ul>
Chris Lattner0a6f6d52011-04-05 07:19:28 +0000[diff] [blame]441
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]442</div>
443
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]444<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]445<h3>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]446<a name="coreimprovements">LLVM IR and Core Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]447</h3>
Chris Lattnerf304ffc2008-02-10 08:17:19 +0000[diff] [blame]448
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]449<div>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]450<p>LLVM IR has several new features for better support of new targets and that
451expose new optimization opportunities:</p>
Chris Lattnerf304ffc2008-02-10 08:17:19 +0000[diff] [blame]452
Chris Lattner791f77b2008-06-05 06:25:56 +0000[diff] [blame]453<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]454<!--
455<li></li>
456-->
Chris Lattnerf304ffc2008-02-10 08:17:19 +0000[diff] [blame]457</ul>
Mikhail Glushenkovea65d7d2008-10-13 02:08:34 +0000[diff] [blame]458
Chris Lattnerf304ffc2008-02-10 08:17:19 +0000[diff] [blame]459</div>
460
461<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]462<h3>
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]463<a name="optimizer">Optimizer Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]464</h3>
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]465
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]466<div>
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]467
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]468<p>In addition to a large array of minor performance tweaks and bug fixes, this
Chris Lattnerf3013872008-10-13 21:50:36 +0000[diff] [blame]469release includes a few major enhancements and additions to the optimizers:</p>
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]470
471<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]472<!--
473<li></li>
474-->
Chris Lattnerc5ac61d2011-04-06 05:50:04 +0000[diff] [blame]475</li>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]476
Chris Lattner11b66112010-10-04 02:42:39 +0000[diff] [blame]477</ul>
478
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]479</div>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]480
Chris Lattner0b832202008-06-08 02:45:07 +0000[diff] [blame]481<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]482<h3>
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]483<a name="mc">MC Level Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]484</h3>
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]485
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]486<div>
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]487<p>
Chris Lattner7d9b6b42010-10-02 21:59:30 +0000[diff] [blame]488The LLVM Machine Code (aka MC) subsystem was created to solve a number
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]489of problems in the realm of assembly, disassembly, object file format handling,
490and a number of other related areas that CPU instruction-set level tools work
Chris Lattner7d9b6b42010-10-02 21:59:30 +0000[diff] [blame]491in.</p>
492
Chris Lattner7d9b6b42010-10-02 21:59:30 +0000[diff] [blame]493<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]494<!--
495<li></li>
496-->
Chris Lattner7d9b6b42010-10-02 21:59:30 +0000[diff] [blame]497</ul>
498
499<p>For more information, please see the <a
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]500href="http://blog.llvm.org/2010/04/intro-to-llvm-mc-project.html">Intro to the
501LLVM MC Project Blog Post</a>.
502</p>
503
NAKAMURA Takumi45c435a2011-04-05 08:24:22 +0000[diff] [blame]504</div>
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]505
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]506<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]507<h3>
Chris Lattner511433e2009-03-02 03:24:11 +0000[diff] [blame]508<a name="codegen">Target Independent Code Generator Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]509</h3>
Chris Lattner0b832202008-06-08 02:45:07 +0000[diff] [blame]510
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]511<div>
Chris Lattner0b832202008-06-08 02:45:07 +0000[diff] [blame]512
Mikhail Glushenkovf795ef02009-03-01 18:09:47 +0000[diff] [blame]513<p>We have put a significant amount of work into the code generator
514infrastructure, which allows us to implement more aggressive algorithms and make
515it run faster:</p>
Chris Lattner0b832202008-06-08 02:45:07 +0000[diff] [blame]516
517<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]518<!--
519<li></li>
520-->
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]521</ul>
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]522</div>
523
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]524<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]525<h3>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]526<a name="x86">X86-32 and X86-64 Target Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]527</h3>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]528
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]529<div>
Chris Lattner7714c912010-10-04 04:39:25 +0000[diff] [blame]530<p>New features and major changes in the X86 target include:
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]531</p>
532
533<ul>
Chad Rosierf94c9c12011-05-27 20:13:10 +0000[diff] [blame]534<li>The CRC32 intrinsics have been renamed. The intrinsics were previously
535 @llvm.x86.sse42.crc32.[8|16|32] and @llvm.x86.sse42.crc64.[8|64]. They have
536 been renamed to @llvm.x86.sse42.crc32.32.[8|16|32] and
537 @llvm.x86.sse42.crc32.64.[8|64].</li>
538
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]539</ul>
540
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]541</div>
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]542
543<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]544<h3>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]545<a name="ARM">ARM Target Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]546</h3>
Chris Lattnerc441fb82009-03-01 02:30:21 +0000[diff] [blame]547
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]548<div>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]549<p>New features of the ARM target include:
550</p>
Chris Lattnerc441fb82009-03-01 02:30:21 +0000[diff] [blame]551
552<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]553<!--
554<li></li>
555-->
Bob Wilsone8472772010-09-13 17:39:35 +0000[diff] [blame]556</ul>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]557</div>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]558
559<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]560<h3>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]561<a name="OtherTS">Other Target Specific Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]562</h3>
Chris Lattnerc441fb82009-03-01 02:30:21 +0000[diff] [blame]563
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]564<div>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]565<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]566<!--
567<li></li>
568-->
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]569</ul>
570</div>
Chris Lattner77d29b12008-06-05 08:02:49 +0000[diff] [blame]571
572<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]573<h3>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]574<a name="changes">Major Changes and Removed Features</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]575</h3>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]576
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]577<div>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]578
Bill Wendling2626dba2011-08-03 22:18:20 +0000[diff] [blame]579<p>If you're already an LLVM user or developer with out-of-tree changes based on
580 LLVM 2.9, this section lists some "gotchas" that you may run into upgrading
581 from the previous release.</p>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]582
583<ul>
Eric Christopher90d6ec52011-09-28 19:47:28 +0000[diff] [blame^]584 <li>The <code>LLVMC</code> front end code was removed while separating
585 out language independence.</li>
Jay Foadf42e9b22011-08-04 10:43:43 +0000[diff] [blame]586 <li>The <code>LowerSetJmp</code> pass wasn't used effectively by any
587 target and has been removed.</li>
Rafael Espindolaf940a1a2011-08-30 23:03:45 +0000[diff] [blame]588 <li>The old <code>TailDup</code> pass was not used in the standard pipeline
589 and was unable to update ssa form, so it has been removed.
Eli Friedmanf03bb262011-08-12 22:50:01 +0000[diff] [blame]590 <li>The syntax of volatile loads and stores in IR has been changed to
591 "<code>load volatile</code>"/"<code>store volatile</code>". The old
592 syntax ("<code>volatile load</code>"/"<code>volatile store</code>")
593 is still accepted, but is now considered deprecated.</li>
Devang Patelb34dd132008-10-14 20:03:43 +0000[diff] [blame]594</ul>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]595
NAKAMURA Takumi2026de22011-08-22 23:22:05 +0000[diff] [blame]596<h4>Windows (32-bit)</h4>
597<div>
598<ul>
599 <li>On Win32(MinGW32 and MSVC), Windows 2000 will not be supported.
600 Windows XP or higher is required.</li>
601</ul>
602</div>
603
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]604</div>
605
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]606<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]607<h3>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]608<a name="api_changes">Internal API Changes</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]609</h3>
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]610
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]611<div>
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]612
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]613<p>In addition, many APIs have changed in this release. Some of the major
Bill Wendling16005252011-08-02 06:20:17 +0000[diff] [blame]614 LLVM API changes are:</p>
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]615
616<ul>
Chris Lattnerd1324302011-07-18 04:56:02 +0000[diff] [blame]617<li>The biggest and most pervasive change is that llvm::Type's are no longer
618 returned or accepted as 'const' values. Instead, just pass around non-const
619 Type's.</li>
620
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]621<li><code>PHINode::reserveOperandSpace</code> has been removed. Instead, you
622 must specify how many operands to reserve space for when you create the
623 PHINode, by passing an extra argument into <code>PHINode::Create</code>.</li>
624
625<li>PHINodes no longer store their incoming BasicBlocks as operands. Instead,
626 the list of incoming BasicBlocks is stored separately, and can be accessed
627 with new functions <code>PHINode::block_begin</code>
628 and <code>PHINode::block_end</code>.</li>
629
630<li>Various functions now take an <code>ArrayRef</code> instead of either a pair
631 of pointers (or iterators) to the beginning and end of a range, or a pointer
632 and a length. Others now return an <code>ArrayRef</code> instead of a
633 reference to a <code>SmallVector</code> or <code>std::vector</code>. These
634 include:
635<ul>
636<!-- Please keep this list sorted. -->
Jay Foada3efbb12011-07-15 08:37:34 +0000[diff] [blame]637<li><code>CallInst::Create</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]638<li><code>ComputeLinearIndex</code> (in <code>llvm/CodeGen/Analysis.h</code>)</li>
639<li><code>ConstantArray::get</code></li>
640<li><code>ConstantExpr::getExtractElement</code></li>
Jay Foaddab3d292011-07-21 14:31:17 +0000[diff] [blame]641<li><code>ConstantExpr::getGetElementPtr</code></li>
642<li><code>ConstantExpr::getInBoundsGetElementPtr</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]643<li><code>ConstantExpr::getIndices</code></li>
644<li><code>ConstantExpr::getInsertElement</code></li>
645<li><code>ConstantExpr::getWithOperands</code></li>
Jay Foad1d2f5692011-07-19 13:32:40 +0000[diff] [blame]646<li><code>ConstantFoldCall</code> (in <code>llvm/Analysis/ConstantFolding.h</code>)</li>
647<li><code>ConstantFoldInstOperands</code> (in <code>llvm/Analysis/ConstantFolding.h</code>)</li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]648<li><code>ConstantVector::get</code></li>
649<li><code>DIBuilder::createComplexVariable</code></li>
650<li><code>DIBuilder::getOrCreateArray</code></li>
651<li><code>ExtractValueInst::Create</code></li>
652<li><code>ExtractValueInst::getIndexedType</code></li>
653<li><code>ExtractValueInst::getIndices</code></li>
654<li><code>FindInsertedValue</code> (in <code>llvm/Analysis/ValueTracking.h</code>)</li>
Jay Foadca12a212011-07-19 14:42:50 +0000[diff] [blame]655<li><code>gep_type_begin</code> (in <code>llvm/Support/GetElementPtrTypeIterator.h</code>)</li>
656<li><code>gep_type_end</code> (in <code>llvm/Support/GetElementPtrTypeIterator.h</code>)</li>
Jay Foada9203102011-07-25 09:48:08 +0000[diff] [blame]657<li><code>GetElementPtrInst::Create</code></li>
658<li><code>GetElementPtrInst::CreateInBounds</code></li>
659<li><code>GetElementPtrInst::getIndexedType</code></li>
Jay Foadb60e8512011-07-21 14:42:51 +0000[diff] [blame]660<li><code>InsertValueInst::Create</code></li>
661<li><code>InsertValueInst::getIndices</code></li>
662<li><code>InvokeInst::Create</code></li>
Jay Foada3efbb12011-07-15 08:37:34 +0000[diff] [blame]663<li><code>IRBuilder::CreateCall</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]664<li><code>IRBuilder::CreateExtractValue</code></li>
Jay Foad0a2a60a2011-07-22 08:16:57 +0000[diff] [blame]665<li><code>IRBuilder::CreateGEP</code></li>
666<li><code>IRBuilder::CreateInBoundsGEP</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]667<li><code>IRBuilder::CreateInsertValue</code></li>
Jay Foada3efbb12011-07-15 08:37:34 +0000[diff] [blame]668<li><code>IRBuilder::CreateInvoke</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]669<li><code>MDNode::get</code></li>
670<li><code>MDNode::getIfExists</code></li>
671<li><code>MDNode::getTemporary</code></li>
672<li><code>MDNode::getWhenValsUnresolved</code></li>
Jay Foadb9b54eb2011-07-19 15:07:52 +0000[diff] [blame]673<li><code>SimplifyGEPInst</code> (in <code>llvm/Analysis/InstructionSimplify.h</code>)</li>
Jay Foad8fbbb392011-07-19 14:01:37 +0000[diff] [blame]674<li><code>TargetData::getIndexedOffset</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]675</ul></li>
676
677<li>All forms of <code>StringMap::getOrCreateValue</code> have been remove
678 except for the one which takes a <code>StringRef</code>.</li>
679
Bill Wendling16005252011-08-02 06:20:17 +0000[diff] [blame]680<li>The <code>LLVMBuildUnwind</code> function from the C API was removed. The
681 LLVM <code>unwind</code> instruction has been deprecated for a long time and
Bill Wendling086da7e2011-08-02 06:39:13 +0000[diff] [blame]682 isn't used by the current front-ends. So this was removed during the
Bill Wendling16005252011-08-02 06:20:17 +0000[diff] [blame]683 exception handling rewrite.</li>
684
Bill Wendling2626dba2011-08-03 22:18:20 +0000[diff] [blame]685<li>The <code>LLVMAddLowerSetJmpPass</code> function from the C API was removed
686 because the <code>LowerSetJmp</code> pass was removed.</li>
687
Devang Patel6326a422011-08-15 23:00:00 +0000[diff] [blame]688<li>The <code>DIBuilder</code> interface used by front ends to encode debugging
689 information in the LLVM IR now expects clients to use <code>DIBuilder::finalize()</code>
690 at the end of translation unit to complete debugging information encoding.</li>
691
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]692</ul>
693</div>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]694
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]695</div>
696
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]697<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]698<h2>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]699 <a name="knownproblems">Known Problems</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]700</h2>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]701<!-- *********************************************************************** -->
702
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]703<div>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]704
Mikhail Glushenkovf795ef02009-03-01 18:09:47 +0000[diff] [blame]705<p>This section contains significant known problems with the LLVM system,
Chris Lattnere18b32e2008-11-10 05:40:34 +0000[diff] [blame]706listed by component. If you run into a problem, please check the <a
Chris Lattnerc463b272005-10-29 07:07:09 +0000[diff] [blame]707href="http://llvm.org/bugs/">LLVM bug database</a> and submit a bug if
Chris Lattner5eccca42003-12-12 21:22:16 +0000[diff] [blame]708there isn't already one.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]709
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]710<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]711<h3>
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]712 <a name="experimental">Experimental features included with this release</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]713</h3>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]714
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]715<div>
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]716
Misha Brukman6df9e2c2004-05-12 21:46:05 +0000[diff] [blame]717<p>The following components of this LLVM release are either untested, known to
718be broken or unreliable, or are in early development. These components should
719not be relied on, and bugs should not be filed against them, but they may be
720useful to some people. In particular, if you would like to work on one of these
Chris Lattner2b659ef2008-02-12 06:29:45 +0000[diff] [blame]721components, please contact us on the <a
722href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVMdev list</a>.</p>
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]723
724<ul>
Chris Lattnerbe2e1b52011-03-10 07:43:44 +0000[diff] [blame]725<li>The Alpha, Blackfin, CellSPU, MicroBlaze, MSP430, MIPS, PTX, SystemZ
Chris Lattnerbb117712010-10-04 01:29:06 +0000[diff] [blame]726 and XCore backends are experimental.</li>
Chris Lattner7d9b6b42010-10-02 21:59:30 +0000[diff] [blame]727<li><tt>llc</tt> "<tt>-filetype=obj</tt>" is experimental on all targets
Chris Lattner49123fd2011-04-06 06:29:50 +0000[diff] [blame]728 other than darwin and ELF X86 systems.</li>
Chris Lattnerbe2e1b52011-03-10 07:43:44 +0000[diff] [blame]729
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]730</ul>
731
732</div>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]733
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]734<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]735<h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]736 <a name="x86-be">Known problems with the X86 back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]737</h3>
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]738
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]739<div>
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]740
741<ul>
Anton Korobeynikova6094be2008-06-08 10:24:13 +0000[diff] [blame]742 <li>The X86 backend does not yet support
743 all <a href="http://llvm.org/PR879">inline assembly that uses the X86
744 floating point stack</a>. It supports the 'f' and 't' constraints, but not
745 'u'.</li>
Dan Gohman8207ba92008-06-08 23:05:11 +0000[diff] [blame]746 <li>The X86-64 backend does not yet support the LLVM IR instruction
Chris Lattner914ce462010-04-22 06:28:20 +0000[diff] [blame]747 <tt>va_arg</tt>. Currently, front-ends support variadic
Dan Gohman8207ba92008-06-08 23:05:11 +0000[diff] [blame]748 argument constructs on X86-64 by lowering them manually.</li>
NAKAMURA Takumi45c435a2011-04-05 08:24:22 +0000[diff] [blame]749 <li>Windows x64 (aka Win64) code generator has a few issues.
750 <ul>
751 <li>llvm-gcc cannot build the mingw-w64 runtime currently
752 due to lack of support for the 'u' inline assembly
753 constraint and for X87 floating point inline assembly.</li>
754 <li>On mingw-w64, you will see unresolved symbol <tt>__chkstk</tt>
755 due to <a href="http://llvm.org/bugs/show_bug.cgi?id=8919">Bug 8919</a>.
756 It is fixed in <a href="http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20110321/118499.html">r128206</a>.</li>
757 <li>Miss-aligned MOVDQA might crash your program. It is due to
758 <a href="http://llvm.org/bugs/show_bug.cgi?id=9483">Bug 9483</a>,
759 lack of handling aligned internal globals.</li>
760 </ul>
761 </li>
762
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]763</ul>
764
765</div>
766
767<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]768<h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]769 <a name="ppc-be">Known problems with the PowerPC back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]770</h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]771
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]772<div>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]773
774<ul>
Nicolas Geoffraye4285dc2007-05-15 09:21:28 +0000[diff] [blame]775<li>The Linux PPC32/ABI support needs testing for the interpreter and static
Chris Lattner57a460e2007-05-23 04:39:32 +0000[diff] [blame]776compilation, and lacks support for debug information.</li>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]777</ul>
778
779</div>
780
781<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]782<h3>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]783 <a name="arm-be">Known problems with the ARM back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]784</h3>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]785
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]786<div>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]787
788<ul>
Chris Lattner57a460e2007-05-23 04:39:32 +0000[diff] [blame]789<li>Thumb mode works only on ARMv6 or higher processors. On sub-ARMv6
Duncan Sandsc90d68b2007-09-26 15:59:54 +0000[diff] [blame]790processors, thumb programs can crash or produce wrong
Chris Lattner57a460e2007-05-23 04:39:32 +0000[diff] [blame]791results (<a href="http://llvm.org/PR1388">PR1388</a>).</li>
John Criswell524a5dd2009-03-02 15:28:15 +0000[diff] [blame]792<li>Compilation for ARM Linux OABI (old ABI) is supported but not fully tested.
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]793</li>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]794</ul>
795
796</div>
797
798<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]799<h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]800 <a name="sparc-be">Known problems with the SPARC back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]801</h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]802
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]803<div>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]804
805<ul>
John Criswell524a5dd2009-03-02 15:28:15 +0000[diff] [blame]806<li>The SPARC backend only supports the 32-bit SPARC ABI (-m32); it does not
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]807 support the 64-bit SPARC ABI (-m64).</li>
808</ul>
809
810</div>
811
812<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]813<h3>
Bruno Cardoso Lopesb7e1a4f2008-10-25 14:56:26 +0000[diff] [blame]814 <a name="mips-be">Known problems with the MIPS back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]815</h3>
Bruno Cardoso Lopesb7e1a4f2008-10-25 14:56:26 +0000[diff] [blame]816
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]817<div>
Bruno Cardoso Lopesb7e1a4f2008-10-25 14:56:26 +0000[diff] [blame]818
819<ul>
Bruno Cardoso Lopesb7e1a4f2008-10-25 14:56:26 +0000[diff] [blame]820<li>64-bit MIPS targets are not supported yet.</li>
821</ul>
822
823</div>
824
825<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]826<h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]827 <a name="alpha-be">Known problems with the Alpha back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]828</h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]829
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]830<div>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]831
832<ul>
833
834<li>On 21164s, some rare FP arithmetic sequences which may trap do not have the
835appropriate nops inserted to ensure restartability.</li>
836
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]837</ul>
838</div>
839
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]840<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]841<h3>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]842 <a name="c-be">Known problems with the C back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]843</h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]844
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]845<div>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]846
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]847<p>The C backend has numerous problems and is not being actively maintained.
848Depending on it for anything serious is not advised.</p>
849
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]850<ul>
Chris Lattner5733b272008-06-05 06:35:40 +0000[diff] [blame]851<li><a href="http://llvm.org/PR802">The C backend has only basic support for
852 inline assembly code</a>.</li>
Chris Lattner725a0d82007-09-26 06:01:35 +0000[diff] [blame]853<li><a href="http://llvm.org/PR1658">The C backend violates the ABI of common
854 C++ programs</a>, preventing intermixing between C++ compiled by the CBE and
Gabor Greif4906abe2009-03-02 12:02:51 +0000[diff] [blame]855 C++ code compiled with <tt>llc</tt> or native compilers.</li>
Duncan Sandsf74c0cc2008-02-10 13:40:55 +0000[diff] [blame]856<li>The C backend does not support all exception handling constructs.</li>
Duncan Sands50723a92009-02-25 11:51:54 +0000[diff] [blame]857<li>The C backend does not support arbitrary precision integers.</li>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]858</ul>
859
860</div>
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]861
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]862
863<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]864<h3>
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]865 <a name="llvm-gcc">Known problems with the llvm-gcc front-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]866</h3>
Chris Lattner47588f92003-10-02 05:07:23 +0000[diff] [blame]867
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]868<div>
Chris Lattnerc5d658a2006-03-03 00:34:26 +0000[diff] [blame]869
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]870<p><b>LLVM 3.0 will be the last release of llvm-gcc.</b></p>
Chris Lattner49123fd2011-04-06 06:29:50 +0000[diff] [blame]871
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]872<p>llvm-gcc is generally very stable for the C family of languages. The only
873 major language feature of GCC not supported by llvm-gcc is the
874 <tt>__builtin_apply</tt> family of builtins. However, some extensions
875 are only supported on some targets. For example, trampolines are only
876 supported on some targets (these are used when you take the address of a
877 nested function).</p>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]878
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]879<p>Fortran support generally works, but there are still several unresolved bugs
880 in <a href="http://llvm.org/bugs/">Bugzilla</a>. Please see the
881 tools/gfortran component for details. Note that llvm-gcc is missing major
882 Fortran performance work in the frontend and library that went into GCC after
883 4.2. If you are interested in Fortran, we recommend that you consider using
884 <a href="#dragonegg">dragonegg</a> instead.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]885
Duncan Sands3af96332010-10-04 10:06:56 +0000[diff] [blame]886<p>The llvm-gcc 4.2 Ada compiler has basic functionality, but is no longer being
887actively maintained. If you are interested in Ada, we recommend that you
888consider using <a href="#dragonegg">dragonegg</a> instead.</p>
Chris Lattner2b659ef2008-02-12 06:29:45 +0000[diff] [blame]889</div>
890
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]891</div>
892
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]893<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]894<h2>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]895 <a name="additionalinfo">Additional Information</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]896</h2>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]897<!-- *********************************************************************** -->
898
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]899<div>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]900
Chris Lattner416db102005-05-16 17:13:10 +0000[diff] [blame]901<p>A wide variety of additional information is available on the <a
NAKAMURA Takumib9a33632011-04-09 02:13:37 +0000[diff] [blame]902href="http://llvm.org/">LLVM web page</a>, in particular in the <a
Chris Lattnerb4b0ce72007-05-18 00:44:29 +0000[diff] [blame]903href="http://llvm.org/docs/">documentation</a> section. The web page also
Reid Spencer669ed452007-07-09 08:04:31 +0000[diff] [blame]904contains versions of the API documentation which is up-to-date with the
905Subversion version of the source code.
Misha Brukman109d9e82005-03-30 19:14:24 +0000[diff] [blame]906You can access versions of these documents specific to this release by going
907into the "<tt>llvm/doc/</tt>" directory in the LLVM tree.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]908
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]909<p>If you have any questions or comments about LLVM, please feel free to contact
Chris Lattnerc463b272005-10-29 07:07:09 +0000[diff] [blame]910us via the <a href="http://llvm.org/docs/#maillist"> mailing
Chris Lattner5eccca42003-12-12 21:22:16 +0000[diff] [blame]911lists</a>.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]912
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]913</div>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]914
915<!-- *********************************************************************** -->
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]916
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]917<hr>
Misha Brukman2061e892003-11-22 01:23:39 +0000[diff] [blame]918<address>
Misha Brukman38847d52003-12-21 22:53:21 +0000[diff] [blame]919 <a href="http://jigsaw.w3.org/css-validator/check/referer"><img
Misha Brukman44408702008-12-11 17:34:48 +0000[diff] [blame]920 src="http://jigsaw.w3.org/css-validator/images/vcss-blue" alt="Valid CSS"></a>
Misha Brukman2061e892003-11-22 01:23:39 +0000[diff] [blame]921 <a href="http://validator.w3.org/check/referer"><img
Misha Brukman44408702008-12-11 17:34:48 +0000[diff] [blame]922 src="http://www.w3.org/Icons/valid-html401-blue" alt="Valid HTML 4.01"></a>
Misha Brukman2061e892003-11-22 01:23:39 +0000[diff] [blame]923
Chris Lattnerb4b0ce72007-05-18 00:44:29 +0000[diff] [blame]924 <a href="http://llvm.org/">LLVM Compiler Infrastructure</a><br>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]925 Last modified: $Date$
Misha Brukman2061e892003-11-22 01:23:39 +0000[diff] [blame]926</address>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]927
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]928</body>
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