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gerrit-public.fairphone.software / fp2-dev / platform / external / llvm / 566f40b169d4edfe6cc7a7a05f3d01c149317a32 / . / docs / ReleaseNotes.html
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Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
2 "http://www.w3.org/TR/html4/strict.dtd">
3<html>
4<head>
5 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
6 <link rel="stylesheet" href="llvm.css" type="text/css">
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]7 <title>LLVM 2.7 Release Notes</title>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]8</head>
9<body>
10
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]11<div class="doc_title">LLVM 2.7 Release Notes</div>
Mikhail Glushenkov808cd3e2008-10-13 02:08:34 +0000[diff] [blame]12
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]13<img align=right src="http://llvm.org/img/DragonSmall.png"
14 width="136" height="136">
15
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]16<ol>
17 <li><a href="#intro">Introduction</a></li>
Chris Lattner78a130b2008-10-13 18:01:01 +0000[diff] [blame]18 <li><a href="#subproj">Sub-project Status Update</a></li>
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]19 <li><a href="#externalproj">External Projects Using LLVM 2.7</a></li>
20 <li><a href="#whatsnew">What's New in LLVM 2.7?</a></li>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]21 <li><a href="GettingStarted.html">Installation Instructions</a></li>
22 <li><a href="#portability">Portability and Supported Platforms</a></li>
Dan Gohman0de549c2008-10-14 16:23:02 +0000[diff] [blame]23 <li><a href="#knownproblems">Known Problems</a></li>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]24 <li><a href="#additionalinfo">Additional Information</a></li>
25</ol>
26
27<div class="doc_author">
Dan Gohman0de549c2008-10-14 16:23:02 +0000[diff] [blame]28 <p>Written by the <a href="http://llvm.org">LLVM Team</a></p>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]29</div>
30
Chris Lattner6ba1be32010-04-13 06:37:00 +0000[diff] [blame]31<!--
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]32<h1 style="color:red">These are in-progress notes for the upcoming LLVM 2.7
33release.<br>
34You may prefer the
35<a href="http://llvm.org/releases/2.6/docs/ReleaseNotes.html">LLVM 2.6
Chris Lattner6ba1be32010-04-13 06:37:00 +0000[diff] [blame]36Release Notes</a>.</h1>-->
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]37
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]38<!-- *********************************************************************** -->
39<div class="doc_section">
40 <a name="intro">Introduction</a>
41</div>
42<!-- *********************************************************************** -->
43
44<div class="doc_text">
45
Chris Lattner92eacf82008-10-13 17:57:36 +0000[diff] [blame]46<p>This document contains the release notes for the LLVM Compiler
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]47Infrastructure, release 2.7. Here we describe the status of LLVM, including
Chris Lattner92eacf82008-10-13 17:57:36 +0000[diff] [blame]48major improvements from the previous release and significant known problems.
Mikhail Glushenkovf61066a2009-03-01 18:09:47 +0000[diff] [blame]49All LLVM releases may be downloaded from the <a
Chris Lattner92eacf82008-10-13 17:57:36 +0000[diff] [blame]50href="http://llvm.org/releases/">LLVM releases web site</a>.</p>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]51
52<p>For more information about LLVM, including information about the latest
53release, please check out the <a href="http://llvm.org/">main LLVM
54web site</a>. If you have questions or comments, the <a
Chris Lattner58b1d0f2010-03-17 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>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]57
Mikhail Glushenkov808cd3e2008-10-13 02:08:34 +0000[diff] [blame]58<p>Note that if you are reading this file from a Subversion checkout or the
Chris Lattnerb0d6c502007-09-21 03:54:09 +0000[diff] [blame]59main LLVM web page, this document applies to the <i>next</i> release, not the
Gabor Greif7c65c4f2008-10-14 11:00:32 +0000[diff] [blame]60current one. To see the release notes for a specific release, please see the
Chris Lattnerb0d6c502007-09-21 03:54:09 +0000[diff] [blame]61<a href="http://llvm.org/releases/">releases page</a>.</p>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]62
Chris Lattner58b1d0f2010-03-17 04:41:49 +0000[diff] [blame]63
Chris Lattner2b656342010-03-17 06:41:58 +0000[diff] [blame]64<p>FIXME: llvm.org moved to new server, mention new logo, Ted and Doug new code
Chris Lattner88b76122010-04-16 06:20:22 +0000[diff] [blame]65 owners, web page in llvm-www repos.</p>
Chris Lattner58b1d0f2010-03-17 04:41:49 +0000[diff] [blame]66
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]67</div>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]68
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]69
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]70<!--
71Almost dead code.
72 include/llvm/Analysis/LiveValues.h => Dan
73 lib/Transforms/IPO/MergeFunctions.cpp => consider for 2.8.
74 llvm/Analysis/PointerTracking.h => Edwin wants this, consider for 2.8.
Chris Lattner6ba1be32010-04-13 06:37:00 +0000[diff] [blame]75 ABCD, GEPSplitterPass
Chris Lattner2bd5e652010-01-16 21:25:13 +0000[diff] [blame]76 MSIL backend?
Chris Lattner2b656342010-03-17 06:41:58 +0000[diff] [blame]77 lib/Transforms/Utils/SSI.cpp -> ABCD depends on it.
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]78-->
79
80
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]81<!-- Features that need text if they're finished for 2.7:
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]82 gcc plugin.
83 strong phi elim
84 variable debug info for optimized code
Chris Lattnerb2cc5022009-02-26 22:33:38 +0000[diff] [blame]85 postalloc scheduler: anti dependence breaking, hazard recognizer?
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]86 metadata
87 loop dependence analysis
88 ELF Writer? How stable?
89 <li>PostRA scheduler improvements, ARM adoption (David Goodwin).</li>
Chris Lattner8fda4952008-02-10 07:46:44 +0000[diff] [blame]90 -->
Mikhail Glushenkov808cd3e2008-10-13 02:08:34 +0000[diff] [blame]91
Chris Lattner4f076402008-10-12 19:47:48 +0000[diff] [blame]92 <!-- for announcement email:
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]93 Logo web page.
94 llvm devmtg
95 compiler_rt
96 KLEE web page at klee.llvm.org
97 Many new papers added to /pubs/
Chris Lattner2b656342010-03-17 06:41:58 +0000[diff] [blame]98 Mention gcc plugin.
Chris Lattnera53f4972009-02-25 06:34:50 +0000[diff] [blame]99 -->
Chris Lattner8fda4952008-02-10 07:46:44 +0000[diff] [blame]100
Chris Lattner78a130b2008-10-13 18:01:01 +0000[diff] [blame]101<!-- *********************************************************************** -->
102<div class="doc_section">
103 <a name="subproj">Sub-project Status Update</a>
Chris Lattnerf65224f2008-06-08 21:34:41 +0000[diff] [blame]104</div>
Chris Lattner78a130b2008-10-13 18:01:01 +0000[diff] [blame]105<!-- *********************************************************************** -->
Chris Lattnerf65224f2008-06-08 21:34:41 +0000[diff] [blame]106
107<div class="doc_text">
Chris Lattnerf6a0d382008-06-08 21:58:17 +0000[diff] [blame]108<p>
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]109The LLVM 2.7 distribution currently consists of code from the core LLVM
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]110repository (which roughly includes the LLVM optimizers, code generators
111and supporting tools), the Clang repository and the llvm-gcc repository. In
112addition to this code, the LLVM Project includes other sub-projects that are in
113development. Here we include updates on these subprojects.
Bill Wendlingdde41b82009-03-02 04:28:57 +0000[diff] [blame]114</p>
Chris Lattner78a130b2008-10-13 18:01:01 +0000[diff] [blame]115
Chris Lattnerf6a0d382008-06-08 21:58:17 +0000[diff] [blame]116</div>
117
Chris Lattner78a130b2008-10-13 18:01:01 +0000[diff] [blame]118
Chris Lattnerf6a0d382008-06-08 21:58:17 +0000[diff] [blame]119<!--=========================================================================-->
Chris Lattner78a130b2008-10-13 18:01:01 +0000[diff] [blame]120<div class="doc_subsection">
Chris Lattnera3c683b2008-10-13 18:11:54 +0000[diff] [blame]121<a name="clang">Clang: C/C++/Objective-C Frontend Toolkit</a>
Chris Lattnerf6a0d382008-06-08 21:58:17 +0000[diff] [blame]122</div>
123
124<div class="doc_text">
125
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]126<p>The <a href="http://clang.llvm.org/">Clang project</a> is ...</p>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]127
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]128<p>In the LLVM 2.7 time-frame, the Clang team has made many improvements:</p>
Bill Wendling385b0d32008-10-27 09:27:33 +0000[diff] [blame]129
Daniel Dunbarf3e35782008-10-14 23:25:09 +0000[diff] [blame]130<ul>
Daniel Dunbar29f1e722010-03-25 16:09:18 +0000[diff] [blame]131<li>FIXME: C++! Include a link to cxx_compatibility.html</li>
132
133<li>FIXME: Static Analyzer improvements?</li>
134
135<li>CIndex API and Python bindings: Clang now includes a C API as part of the
136CIndex library. Although we make make some changes to the API in the future, it
137is intended to be stable and has been designed for use by external projects. See
138the Clang
139doxygen <a href="http://clang.llvm.org/doxygen/group__CINDEX.html">CIndex</a>
140documentation for more details. The CIndex API also includings an preliminary
141set of Python bindings.</li>
142
143<li>ARM Support: Clang now has ABI support for both the Darwin and Linux ARM
144ABIs. Coupled with many improvements to the LLVM ARM backend, Clang is now
145suitable for use as a a beta quality ARM compiler.</li>
Bill Wendlinga8fb81d2009-03-02 04:28:18 +0000[diff] [blame]146</ul>
Chris Lattnera3c683b2008-10-13 18:11:54 +0000[diff] [blame]147</div>
148
149<!--=========================================================================-->
150<div class="doc_subsection">
151<a name="clangsa">Clang Static Analyzer</a>
152</div>
153
154<div class="doc_text">
155
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]156<p>Previously announced in the 2.4, 2.5, and 2.6 LLVM releases, the Clang project also
Ted Kremeneka0d77d72009-02-27 07:01:32 +0000[diff] [blame]157includes an early stage static source code analysis tool for <a
158href="http://clang.llvm.org/StaticAnalysis.html">automatically finding bugs</a>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]159in C and Objective-C programs. The tool performs checks to find
Ted Kremeneka0d77d72009-02-27 07:01:32 +0000[diff] [blame]160bugs that occur on a specific path within a program.</p>
Chris Lattnerc2d84672008-10-14 00:52:49 +0000[diff] [blame]161
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]162<p>In the LLVM 2.7 time-frame, the analyzer core has sprouted legs and...</p>
Chris Lattnerf6a0d382008-06-08 21:58:17 +0000[diff] [blame]163
164</div>
165
Chris Lattner78a130b2008-10-13 18:01:01 +0000[diff] [blame]166<!--=========================================================================-->
167<div class="doc_subsection">
Nicolas Geoffray2b139382008-10-14 19:23:04 +0000[diff] [blame]168<a name="vmkit">VMKit: JVM/CLI Virtual Machine Implementation</a>
Chris Lattner78a130b2008-10-13 18:01:01 +0000[diff] [blame]169</div>
170
171<div class="doc_text">
172<p>
Nicolas Geoffray2b139382008-10-14 19:23:04 +0000[diff] [blame]173The <a href="http://vmkit.llvm.org/">VMKit project</a> is an implementation of
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]174a JVM and a CLI Virtual Machine (Microsoft .NET is an
175implementation of the CLI) using LLVM for static and just-in-time
176compilation.</p>
Chris Lattner78a130b2008-10-13 18:01:01 +0000[diff] [blame]177
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]178<p>
Chris Lattnerd5b62522010-03-29 18:34:13 +0000[diff] [blame]179With the release of LLVM 2.7, VMKit has shifted to a great framework for writing
180virtual machines. VMKit now offers precise and efficient garbage collection with
181multi-threading support, thanks to the MMTk memory management toolkit, as well
182as just in time and ahead of time compilation with LLVM. The major changes in
183VMKit 0.27 are:</p>
Chris Lattner78a130b2008-10-13 18:01:01 +0000[diff] [blame]184
Nicolas Geoffray2b139382008-10-14 19:23:04 +0000[diff] [blame]185<ul>
186
Chris Lattnerd5b62522010-03-29 18:34:13 +0000[diff] [blame]187<li>Garbage collection: VMKit now uses the MMTk toolkit for garbage collectors.
188 The first collector to be ported is the MarkSweep collector, which is precise,
189 and drastically improves the performance of VMKit.</li>
190<li>Line number information in the JVM: by using the debug metadata of LLVM, the
191 JVM now supports precise line number information, useful when printing a stack
192 trace.</li>
193<li>Interface calls in the JVM: we implemented a variant of the Interface Method
194 Table technique for interface calls in the JVM.
195</li>
Nicolas Geoffray2b139382008-10-14 19:23:04 +0000[diff] [blame]196
197</ul>
Chris Lattner78a130b2008-10-13 18:01:01 +0000[diff] [blame]198</div>
199
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]200
201<!--=========================================================================-->
202<div class="doc_subsection">
203<a name="compiler-rt">compiler-rt: Compiler Runtime Library</a>
204</div>
205
206<div class="doc_text">
207<p>
208The new LLVM <a href="http://compiler-rt.llvm.org/">compiler-rt project</a>
209is a simple library that provides an implementation of the low-level
210target-specific hooks required by code generation and other runtime components.
211For example, when compiling for a 32-bit target, converting a double to a 64-bit
212unsigned integer is compiled into a runtime call to the "__fixunsdfdi"
213function. The compiler-rt library provides highly optimized implementations of
214this and other low-level routines (some are 3x faster than the equivalent
215libgcc routines).</p>
216
217<p>
218All of the code in the compiler-rt project is available under the standard LLVM
219License, a "BSD-style" license.</p>
220
221</div>
222
223<!--=========================================================================-->
224<div class="doc_subsection">
Duncan Sands2d9c3082010-04-02 09:23:15 +0000[diff] [blame]225<a name="dragonegg">DragonEgg: llvm-gcc ported to gcc-4.5</a>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]226</div>
227
228<div class="doc_text">
229<p>
Duncan Sands2d9c3082010-04-02 09:23:15 +0000[diff] [blame]230<a href="http://dragonegg.llvm.org/">DragonEgg</a> is a port of llvm-gcc to
231gcc-4.5. Unlike llvm-gcc, which makes many intrusive changes to the underlying
232gcc-4.2 code, dragonegg in theory does not require any gcc-4.5 modifications
233whatsoever (currently one small patch is needed). This is thanks to the new
234<a href="http://gcc.gnu.org/wiki/plugins">gcc plugin architecture</a>, which
235makes it possible to modify the behaviour of gcc at runtime by loading a plugin,
236which is nothing more than a dynamic library which conforms to the gcc plugin
237interface. DragonEgg is a gcc plugin that causes the LLVM optimizers to be run
238instead of the gcc optimizers, and the LLVM code generators instead of the gcc
239code generators, just like llvm-gcc. To use it, you add
240"-fplugin=path/dragonegg.so" to the gcc-4.5 command line, and gcc-4.5 magically
241becomes llvm-gcc-4.5!
242</p>
243
244<p>
245DragonEgg is still a work in progress. Currently C works very well, while C++,
246Ada and Fortran work fairly well. All other languages either don't work at all,
247or only work poorly. For the moment only the x86-32 and x86-64 targets are
Duncan Sands566f40b2010-04-20 19:40:58 +0000[diff] [blame^]248supported, and only on linux and darwin (darwin needs an additional gcc patch).
Duncan Sands2d9c3082010-04-02 09:23:15 +0000[diff] [blame]249</p>
250
251<p>
Duncan Sands566f40b2010-04-20 19:40:58 +0000[diff] [blame^]252The first dragonegg release will occur shortly after llvm-2.7 is released.
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]253</p>
254
255</div>
256
257
258<!--=========================================================================-->
259<div class="doc_subsection">
260<a name="mc">llvm-mc: Machine Code Toolkit</a>
261</div>
262
263<div class="doc_text">
264<p>
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]265The LLVM Machine Code (MC) Toolkit project is ...
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]266</p>
267
268</div>
269
270
Chris Lattnerb2cc5022009-02-26 22:33:38 +0000[diff] [blame]271<!-- *********************************************************************** -->
272<div class="doc_section">
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]273 <a name="externalproj">External Open Source Projects Using LLVM 2.7</a>
Chris Lattnerb2cc5022009-02-26 22:33:38 +0000[diff] [blame]274</div>
275<!-- *********************************************************************** -->
276
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]277<div class="doc_text">
278
279<p>An exciting aspect of LLVM is that it is used as an enabling technology for
280 a lot of other language and tools projects. This section lists some of the
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]281 projects that have already been updated to work with LLVM 2.7.</p>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]282</div>
283
284
285<!--=========================================================================-->
286<div class="doc_subsection">
287<a name="Rubinius">Rubinius</a>
288</div>
289
290<div class="doc_text">
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]291Need update.
292<!--
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]293<p><a href="http://github.com/evanphx/rubinius">Rubinius</a> is an environment
294for running Ruby code which strives to write as much of the core class
295implementation in Ruby as possible. Combined with a bytecode interpreting VM, it
296uses LLVM to optimize and compile ruby code down to machine code. Techniques
297such as type feedback, method inlining, and uncommon traps are all used to
298remove dynamism from ruby execution and increase performance.</p>
299
300<p>Since LLVM 2.5, Rubinius has made several major leaps forward, implementing
301a counter based JIT, type feedback and speculative method inlining.
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]302-->
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]303</p>
304
305</div>
306
307<!--=========================================================================-->
308<div class="doc_subsection">
309<a name="macruby">MacRuby</a>
310</div>
311
312<div class="doc_text">
313
314<p>
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]315Need update.
316<!--
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]317<a href="http://macruby.org">MacRuby</a> is an implementation of Ruby on top of
318core Mac OS X technologies, such as the Objective-C common runtime and garbage
319collector and the CoreFoundation framework. It is principally developed by
320Apple and aims at enabling the creation of full-fledged Mac OS X applications.
321</p>
322
323<p>
324MacRuby uses LLVM for optimization passes, JIT and AOT compilation of Ruby
325expressions. It also uses zero-cost DWARF exceptions to implement Ruby exception
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]326handling.--> </p>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]327
328</div>
329
330
Chris Lattnerb2cc5022009-02-26 22:33:38 +0000[diff] [blame]331<!--=========================================================================-->
332<div class="doc_subsection">
333<a name="pure">Pure</a>
334</div>
335
336<div class="doc_text">
337<p>
Chris Lattner47202c32009-03-02 02:37:32 +0000[diff] [blame]338<a href="http://pure-lang.googlecode.com/">Pure</a>
339is an algebraic/functional programming language based on term rewriting.
Chris Lattnerb2cc5022009-02-26 22:33:38 +0000[diff] [blame]340Programs are collections of equations which are used to evaluate expressions in
341a symbolic fashion. Pure offers dynamic typing, eager and lazy evaluation,
Mikhail Glushenkovf61066a2009-03-01 18:09:47 +0000[diff] [blame]342lexical closures, a hygienic macro system (also based on term rewriting),
Chris Lattnerb2cc5022009-02-26 22:33:38 +0000[diff] [blame]343built-in list and matrix support (including list and matrix comprehensions) and
344an easy-to-use C interface. The interpreter uses LLVM as a backend to
345 JIT-compile Pure programs to fast native code.</p>
346
Chris Lattner1f8dc512010-03-17 17:25:49 +0000[diff] [blame]347<p>Pure versions 0.43 and later have been tested and are known to work with
348LLVM 2.7 (and continue to work with older LLVM releases >= 2.5).</p>
349
Chris Lattnerb2cc5022009-02-26 22:33:38 +0000[diff] [blame]350</div>
351
352
353<!--=========================================================================-->
354<div class="doc_subsection">
355<a name="ldc">LLVM D Compiler</a>
356</div>
357
358<div class="doc_text">
359<p>
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]360Need update.
361<!--
Chris Lattner47202c32009-03-02 02:37:32 +0000[diff] [blame]362<a href="http://www.dsource.org/projects/ldc">LDC</a> is an implementation of
363the D Programming Language using the LLVM optimizer and code generator.
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]364The LDC project works great with the LLVM 2.6 release. General improvements in
John Criswellaea8c752009-03-02 15:28:15 +0000[diff] [blame]365this
Chris Lattner47202c32009-03-02 02:37:32 +0000[diff] [blame]366cycle have included new inline asm constraint handling, better debug info
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]367support, general bug fixes and better x86-64 support. This has allowed
368some major improvements in LDC, getting it much closer to being as
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]369fully featured as the original DMD compiler from DigitalMars.-->
Chris Lattnerb2cc5022009-02-26 22:33:38 +0000[diff] [blame]370</p>
371</div>
372
Chris Lattner1ad599a2009-02-28 18:58:01 +0000[diff] [blame]373<!--=========================================================================-->
374<div class="doc_subsection">
375<a name="RoadsendPHP">Roadsend PHP</a>
376</div>
377
378<div class="doc_text">
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]379<p>
380<a href="http://code.roadsend.com/rphp">Roadsend PHP</a> (rphp) is an open
Chris Lattner9e08de12009-03-02 19:07:24 +0000[diff] [blame]381source implementation of the PHP programming
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]382language that uses LLVM for its optimizer, JIT and static compiler. This is a
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]383reimplementation of an earlier project that is now based on LLVM.
Chris Lattner1f8dc512010-03-17 17:25:49 +0000[diff] [blame]384</p>
Chris Lattner1ad599a2009-02-28 18:58:01 +0000[diff] [blame]385</div>
Chris Lattnerb2cc5022009-02-26 22:33:38 +0000[diff] [blame]386
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]387<!--=========================================================================-->
388<div class="doc_subsection">
389<a name="UnladenSwallow">Unladen Swallow</a>
390</div>
391
392<div class="doc_text">
393<p>
394<a href="http://code.google.com/p/unladen-swallow/">Unladen Swallow</a> is a
395branch of <a href="http://python.org/">Python</a> intended to be fully
396compatible and significantly faster. It uses LLVM's optimization passes and JIT
Chris Lattnerd7db82c2010-03-18 06:52:15 +0000[diff] [blame]397compiler.
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]398</p>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]399</div>
400
401<!--=========================================================================-->
402<div class="doc_subsection">
403<a name="llvm-lua">llvm-lua</a>
404</div>
405
406<div class="doc_text">
407<p>
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]408Need update.
409<!--
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]410<a href="http://code.google.com/p/llvm-lua/">LLVM-Lua</a> uses LLVM to add JIT
411and static compiling support to the Lua VM. Lua bytecode is analyzed to
412remove type checks, then LLVM is used to compile the bytecode down to machine
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]413code.-->
414</p>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]415</div>
416
417<!--=========================================================================-->
418<div class="doc_subsection">
419<a name="icedtea">IcedTea Java Virtual Machine Implementation</a>
420</div>
421
422<div class="doc_text">
423<p>
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]424Need update.
425<!--
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]426<a href="http://icedtea.classpath.org/wiki/Main_Page">IcedTea</a> provides a
427harness to build OpenJDK using only free software build tools and to provide
428replacements for the not-yet free parts of OpenJDK. One of the extensions that
429IcedTea provides is a new JIT compiler named <a
430href="http://icedtea.classpath.org/wiki/ZeroSharkFaq">Shark</a> which uses LLVM
431to provide native code generation without introducing processor-dependent
Chris Lattnere5236102010-03-17 04:02:39 +0000[diff] [blame]432code.-->
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]433</p>
434</div>
435
436
Chris Lattner49894862010-03-29 17:50:39 +0000[diff] [blame]437<!--=========================================================================-->
438<div class="doc_subsection">
439<a name="tce">TTA-based Codesign Environment (TCE)</a>
440</div>
441
442<div class="doc_text">
443<p>
444<a href="http://tce.cs.tut.fi/">TCE</a> is a toolset for designing
445application-specific processors (ASP) based on the Transport triggered
446architecture (TTA). The toolset provides a complete co-design flow from C/C++
447programs down to synthesizable VHDL and parallel program binaries. Processor
448customization points include the register files, function units, supported
449operations, and the interconnection network.</p>
450
451<p>TCE uses llvm-gcc/Clang and LLVM for C/C++ language support, target
452independent optimizations and also for parts of code generation. It generates
453new LLVM-based code generators "on the fly" for the designed TTA processors and
454loads them in to the compiler backend as runtime libraries to avoid per-target
455recompilation of larger parts of the compiler chain.</p>
456
457</div>
Chris Lattnerf6a0d382008-06-08 21:58:17 +0000[diff] [blame]458
John Criswelle75f04f2010-04-06 14:52:14 +0000[diff] [blame]459<!--=========================================================================-->
460<div class="doc_subsection">
461<a name="safecode">SAFECode Compiler</a>
462</div>
463
464<div class="doc_text">
465<p>
466<a href="http://safecode.cs.illinois.edu">SAFECode</a> is a memory safe C
467compiler built using LLVM. It takes standard, unannotated C code, analyzes the
468code to ensure that memory accesses and array indexing operations are safe, and
469instruments the code with run-time checks when safety cannot be proven
470statically.
471</p>
472</div>
473
474
Chris Lattnerf6a0d382008-06-08 21:58:17 +0000[diff] [blame]475<!-- *********************************************************************** -->
476<div class="doc_section">
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]477 <a name="whatsnew">What's New in LLVM 2.7?</a>
Chris Lattnerf6a0d382008-06-08 21:58:17 +0000[diff] [blame]478</div>
479<!-- *********************************************************************** -->
480
Chris Lattner5cce7a52008-06-08 22:59:35 +0000[diff] [blame]481<div class="doc_text">
482
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]483<p>This release includes a huge number of bug fixes, performance tweaks and
Chris Lattner92eacf82008-10-13 17:57:36 +0000[diff] [blame]484minor improvements. Some of the major improvements and new features are listed
485in this section.
Chris Lattner5cce7a52008-06-08 22:59:35 +0000[diff] [blame]486</p>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]487
Chris Lattner5cce7a52008-06-08 22:59:35 +0000[diff] [blame]488</div>
489
Chris Lattnerf6a0d382008-06-08 21:58:17 +0000[diff] [blame]490<!--=========================================================================-->
Chris Lattnerf65224f2008-06-08 21:34:41 +0000[diff] [blame]491<div class="doc_subsection">
Chris Lattnere0798082008-02-06 18:00:06 +0000[diff] [blame]492<a name="majorfeatures">Major New Features</a>
493</div>
494
495<div class="doc_text">
496
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]497<p>LLVM 2.7 includes several major new capabilities:</p>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]498
499<ul>
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]500<li>...</li>
Chris Lattner5ba16862008-02-10 08:18:42 +0000[diff] [blame]501</ul>
502
Chris Lattner58b1d0f2010-03-17 04:41:49 +0000[diff] [blame]503Extensible metadata solid.
504
505Debug info improvements: using metadata instead of llvm.dbg global variables.
506This brings several enhancements including improved compile times.
507
508New instruction selector.
509GHC Haskell ABI/ calling conv support.
510Pre-Alpha support for unions in IR.
511New InlineHint and StackAlignment function attributes
512Code generator MC'ized except for debug info and EH.
513New SCEV AA pass: -scev-aa
514Inliner reuses arrays allocas when inlining multiple callers to reduce stack usage.
515MC encoding and disassembler apis.
516Optimal Edge Profiling?
517Instcombine is now a library, has its own IRBuilder to simplify itself.
518New llvm/Support/Regex.h API. FileCheck now does regex's
Chris Lattner2b656342010-03-17 06:41:58 +0000[diff] [blame]519Many subtle pointer invalidation bugs in Callgraph have been fixed and it now uses asserting value handles.
520MC Disassembler (with blog post), MCInstPrinter. Many X86 backend and AsmPrinter simplifications
521Various tools like llc and opt now read either .ll or .bc files as input.
Chris Lattner120eabd2010-03-29 18:42:42 +0000[diff] [blame]522Malloc and free instructions got removed, along with LowerAllocations pass.
Chris Lattner2b656342010-03-17 06:41:58 +0000[diff] [blame]523compiler-rt support for ARM.
524completely llvm-gcc NEON support.
525Can transcode from GAS to intel syntax with "llvm-mc foo.s -output-asm-variant=1"
526JIT debug information with GDB 7.0
Chris Lattner27b5bd52010-03-17 18:15:52 +0000[diff] [blame]527New CodeGen Level CSE
Chris Lattner2b656342010-03-17 06:41:58 +0000[diff] [blame]528CMake can now run tests, what other improvements?
Chris Lattner27b5bd52010-03-17 18:15:52 +0000[diff] [blame]529ARM/Thumb using reg scavenging for stack object address materialization (PEI).
Chris Lattner2b656342010-03-17 06:41:58 +0000[diff] [blame]530New SSAUpdater and MachineSSAUpdater classes for unstructured ssa updating,
531 changed jump threading, GVN, etc to use it which simplified them and speed
532 them up.
Chris Lattner99bfacb2010-03-17 06:42:25 +0000[diff] [blame]533Combiner-AA improvements, why not on by default?
Chris Lattner27b5bd52010-03-17 18:15:52 +0000[diff] [blame]534Pre-regalloc tail duplication
Chris Lattner6ba1be32010-04-13 06:37:00 +0000[diff] [blame]535x86 sibcall / tailcall optimization in CCC mode.
Chris Lattner88b76122010-04-16 06:20:22 +0000[diff] [blame]536New LSR with "full strength reduction" mode. Description?
537Codegen level OptimizeExtsPass pass, takes advantage of x86 subregs.
Chris Lattner6ba1be32010-04-13 06:37:00 +0000[diff] [blame]538Better code size analysis in loop unswitch, inliner code split out to a new
539 CodeMetrics class for reuse.
Chris Lattner1071dbb2010-03-29 18:39:28 +0000[diff] [blame]540The ARM backend now has good support for ARMv4 backend (tested on StrongARM
541 hardware), previously only supported ARMv4T and newer.
Chris Lattner6ba1be32010-04-13 06:37:00 +0000[diff] [blame]542Half-float support in APFloat
543Indirect branch + address of label (blog post), particularly useful for interpreters.
Chris Lattner88b76122010-04-16 06:20:22 +0000[diff] [blame]544Many changes to the pass ordering for improved optimization effectiveness.
545BasicAA improved to be less dependent on "type safe" pointers, it can now look
546 through bitcasts more aggressively.
547GVN PHI Translation improvements. blog post: http://blog.llvm.org/2009/12/advanced-topics-in-redundant-load.html
548llvm.objectsize.
549MachineSSAUpdater.h
550PostRA scheduler for X86?
551llvm.dbg.value, not being used by default though, more in 2.8. Many improvements to debug info
552Support for the GCC option -fno-schedule-insns
553non-temporal load/store
554libllvm2.7.so?? configure with --enable-shared
555dbgs() and -debug-buffer-size=N
556New MicroBlaze backend. http://en.wikipedia.org/wiki/MicroBlaze
557XMM subreg modeling for extraction of the low element.
558
Chris Lattner1071dbb2010-03-29 18:39:28 +0000[diff] [blame]559
Chris Lattner6ba1be32010-04-13 06:37:00 +0000[diff] [blame]560Opt now works conservatively if no target data is set (is this fully working?)
561Target data now has notion of 'native' integer data types which optimizations can use.
562ARM backend generates instructions in unified assembly syntax.
563New Analysis/InstructionSimplify.h interface for simplifying instructions that don't exist.
564Jump threading is now much more aggressive at simplifying correlated
565 conditionals and threading blocks with otherwise complex logic. CondProp pass
566 removed (functionality merged into jump threading).
567X86 and XCore supports returning arbitrary return values, returning too many values is
568 supported by returning through a hidden pointer.
569verbose-asm now produces information about spill slots and loop nests
Chris Lattner27b5bd52010-03-17 18:15:52 +0000[diff] [blame]570
Chris Lattner58b1d0f2010-03-17 04:41:49 +0000[diff] [blame]571
Chris Lattner88b76122010-04-16 06:20:22 +0000[diff] [blame]572Defaults to RTTI off (smaller code size!), packagers should build with make REQUIRE_RTTI=1.
573AndersAA got removed
574PredSimplify, LoopVR, GVNPRE, RSProfiling (random sampling profiling) got removed.
Chris Lattner58b1d0f2010-03-17 04:41:49 +0000[diff] [blame]575LLVM command line tools now overwrite their output, before they would only do this with -f.
576DOUT removed, use DEBUG(errs() instead.
577Much stuff converted to use raw_ostream instead of std::ostream.
578TargetAsmInfo renamed to MCAsmInfo
579llvm/ADT/iterator.h gone.
580
Chris Lattner2b656342010-03-17 06:41:58 +0000[diff] [blame]581
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]582</div>
583
Chris Lattnerb0d6c502007-09-21 03:54:09 +0000[diff] [blame]584<!--=========================================================================-->
585<div class="doc_subsection">
Chris Lattner47202c32009-03-02 02:37:32 +0000[diff] [blame]586<a name="coreimprovements">LLVM IR and Core Improvements</a>
Chris Lattnerc3649452008-02-10 08:17:19 +0000[diff] [blame]587</div>
588
589<div class="doc_text">
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]590<p>LLVM IR has several new features for better support of new targets and that
591expose new optimization opportunities:</p>
Chris Lattnerc3649452008-02-10 08:17:19 +0000[diff] [blame]592
Chris Lattnerc5a4e312008-06-05 06:25:56 +0000[diff] [blame]593<ul>
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]594<li>...</li>
Chris Lattnerc3649452008-02-10 08:17:19 +0000[diff] [blame]595</ul>
Mikhail Glushenkov808cd3e2008-10-13 02:08:34 +0000[diff] [blame]596
Chris Lattnerc3649452008-02-10 08:17:19 +0000[diff] [blame]597</div>
598
599<!--=========================================================================-->
600<div class="doc_subsection">
Chris Lattner8fda4952008-02-10 07:46:44 +0000[diff] [blame]601<a name="optimizer">Optimizer Improvements</a>
602</div>
603
604<div class="doc_text">
605
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]606<p>In addition to a large array of minor performance tweaks and bug fixes, this
Chris Lattnerea9c2242008-10-13 21:50:36 +0000[diff] [blame]607release includes a few major enhancements and additions to the optimizers:</p>
Chris Lattner8fda4952008-02-10 07:46:44 +0000[diff] [blame]608
609<ul>
610
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]611<li>...</li>
Chris Lattner47202c32009-03-02 02:37:32 +0000[diff] [blame]612
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]613</ul>
Chris Lattner47202c32009-03-02 02:37:32 +0000[diff] [blame]614
Chris Lattner317685c2010-03-01 19:29:17 +0000[diff] [blame]615<p>Also, -anders-aa was removed</p>
616
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]617</div>
Chris Lattner47202c32009-03-02 02:37:32 +0000[diff] [blame]618
Chris Lattner47202c32009-03-02 02:37:32 +0000[diff] [blame]619
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]620<!--=========================================================================-->
621<div class="doc_subsection">
622<a name="executionengine">Interpreter and JIT Improvements</a>
623</div>
Chris Lattnerea9c2242008-10-13 21:50:36 +0000[diff] [blame]624
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]625<div class="doc_text">
626
627<ul>
Jeffrey Yasskin40715142010-01-29 19:10:38 +0000[diff] [blame]628<li>The JIT now <a
629href="http://llvm.org/viewvc/llvm-project?view=rev&revision=85295">defaults
630to compiling eagerly</a> to avoid a race condition in the lazy JIT.
631Clients that still want the lazy JIT can switch it on by calling
632<tt>ExecutionEngine::DisableLazyCompilation(false)</tt>.</li>
Jeffrey Yasskinc0577082010-02-11 01:07:39 +0000[diff] [blame]633<li>It is now possible to create more than one JIT instance in the same process.
634These JITs can generate machine code in parallel,
635although <a href="http://llvm.org/docs/ProgrammersManual.html#jitthreading">you
636still have to obey the other threading restrictions</a>.</li>
Chris Lattner0eef6e42008-06-08 02:45:07 +0000[diff] [blame]637</ul>
638
639</div>
640
641<!--=========================================================================-->
642<div class="doc_subsection">
Chris Lattner5f393542009-03-02 03:24:11 +0000[diff] [blame]643<a name="codegen">Target Independent Code Generator Improvements</a>
Chris Lattner0eef6e42008-06-08 02:45:07 +0000[diff] [blame]644</div>
645
646<div class="doc_text">
647
Mikhail Glushenkovf61066a2009-03-01 18:09:47 +0000[diff] [blame]648<p>We have put a significant amount of work into the code generator
649infrastructure, which allows us to implement more aggressive algorithms and make
650it run faster:</p>
Chris Lattner0eef6e42008-06-08 02:45:07 +0000[diff] [blame]651
652<ul>
Chris Lattner5f393542009-03-02 03:24:11 +0000[diff] [blame]653
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]654<li>...</li>
Chris Lattnerb0d6c502007-09-21 03:54:09 +0000[diff] [blame]655</ul>
Chris Lattnerb0d6c502007-09-21 03:54:09 +0000[diff] [blame]656</div>
657
Chris Lattner47202c32009-03-02 02:37:32 +0000[diff] [blame]658<!--=========================================================================-->
659<div class="doc_subsection">
660<a name="x86">X86-32 and X86-64 Target Improvements</a>
661</div>
662
663<div class="doc_text">
664<p>New features of the X86 target include:
665</p>
666
667<ul>
Chris Lattner5f393542009-03-02 03:24:11 +0000[diff] [blame]668
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]669<li>...</li>
Chris Lattner5f393542009-03-02 03:24:11 +0000[diff] [blame]670
Chris Lattner47202c32009-03-02 02:37:32 +0000[diff] [blame]671</ul>
672
Chris Lattner47202c32009-03-02 02:37:32 +0000[diff] [blame]673</div>
Chris Lattnerb0d6c502007-09-21 03:54:09 +0000[diff] [blame]674
675<!--=========================================================================-->
676<div class="doc_subsection">
Chris Lattnere1fbd752009-02-26 07:32:11 +0000[diff] [blame]677<a name="pic16">PIC16 Target Improvements</a>
678</div>
679
680<div class="doc_text">
681<p>New features of the PIC16 target include:
682</p>
683
684<ul>
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]685<li>...</li>
Chris Lattnere1fbd752009-02-26 07:32:11 +0000[diff] [blame]686</ul>
687
688<p>Things not yet supported:</p>
689
690<ul>
Chris Lattnere1fbd752009-02-26 07:32:11 +0000[diff] [blame]691<li>Variable arguments.</li>
Chris Lattner5f393542009-03-02 03:24:11 +0000[diff] [blame]692<li>Interrupts/programs.</li>
Chris Lattnere1fbd752009-02-26 07:32:11 +0000[diff] [blame]693</ul>
694
695</div>
696
Chris Lattnere1fbd752009-02-26 07:32:11 +0000[diff] [blame]697<!--=========================================================================-->
698<div class="doc_subsection">
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]699<a name="ARM">ARM Target Improvements</a>
Chris Lattner7ccc40d2009-03-01 02:30:21 +0000[diff] [blame]700</div>
701
702<div class="doc_text">
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]703<p>New features of the ARM target include:
704</p>
Chris Lattner7ccc40d2009-03-01 02:30:21 +0000[diff] [blame]705
706<ul>
Chris Lattner7ccc40d2009-03-01 02:30:21 +0000[diff] [blame]707
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]708<li>...</li>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]709</ul>
Chris Lattner7ccc40d2009-03-01 02:30:21 +0000[diff] [blame]710
Chris Lattner7ccc40d2009-03-01 02:30:21 +0000[diff] [blame]711
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]712</div>
Chris Lattner7ccc40d2009-03-01 02:30:21 +0000[diff] [blame]713
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]714<!--=========================================================================-->
715<div class="doc_subsection">
716<a name="OtherTarget">Other Target Specific Improvements</a>
717</div>
Chris Lattner7ccc40d2009-03-01 02:30:21 +0000[diff] [blame]718
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]719<div class="doc_text">
720<p>New features of other targets include:
721</p>
722
723<ul>
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]724<li>...</li>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]725</ul>
726
727</div>
728
729<!--=========================================================================-->
730<div class="doc_subsection">
731<a name="newapis">New Useful APIs</a>
732</div>
733
734<div class="doc_text">
735
736<p>This release includes a number of new APIs that are used internally, which
737 may also be useful for external clients.
738</p>
739
740<ul>
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]741<li>...</li>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]742</ul>
743
744
745</div>
746
747<!--=========================================================================-->
748<div class="doc_subsection">
749<a name="otherimprovements">Other Improvements and New Features</a>
750</div>
751
752<div class="doc_text">
753<p>Other miscellaneous features include:</p>
754
755<ul>
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]756<li>...</li>
Chris Lattner7ccc40d2009-03-01 02:30:21 +0000[diff] [blame]757</ul>
758
759</div>
760
Chris Lattnere45f18b2008-06-05 08:02:49 +0000[diff] [blame]761
762<!--=========================================================================-->
763<div class="doc_subsection">
Chris Lattner92eacf82008-10-13 17:57:36 +0000[diff] [blame]764<a name="changes">Major Changes and Removed Features</a>
765</div>
766
767<div class="doc_text">
768
Chris Lattnercc64a322008-10-13 22:06:31 +0000[diff] [blame]769<p>If you're already an LLVM user or developer with out-of-tree changes based
Jeffrey Yasskin8ee1b0a2010-01-28 01:14:43 +0000[diff] [blame]770on LLVM 2.6, this section lists some "gotchas" that you may run into upgrading
Chris Lattnercc64a322008-10-13 22:06:31 +0000[diff] [blame]771from the previous release.</p>
Chris Lattner92eacf82008-10-13 17:57:36 +0000[diff] [blame]772
773<ul>
Jeffrey Yasskin260af332010-02-09 23:03:44 +0000[diff] [blame]774<li>The LLVM interpreter now defaults to <em>not</em> using <tt>libffi</tt> even
775if you have it installed. This makes it more likely that an LLVM built on one
776system will work when copied to a similar system. To use <tt>libffi</tt>,
777configure with <tt>--enable-libffi</tt>.
778</li>
Chris Lattnercc64a322008-10-13 22:06:31 +0000[diff] [blame]779</ul>
780
781
782<p>In addition, many APIs have changed in this release. Some of the major LLVM
783API changes are:</p>
784
785<ul>
Jeffrey Yasskin2ca16212010-01-28 01:41:20 +0000[diff] [blame]786<li><tt>ModuleProvider</tt> has been <a
787href="http://llvm.org/viewvc/llvm-project?view=rev&revision=94686">removed</a>
788and its methods moved to <tt>Module</tt> and <tt>GlobalValue</tt>.
789Most clients can remove uses of <tt>ExistingModuleProvider</tt>,
790replace <tt>getBitcodeModuleProvider</tt> with
791<tt>getLazyBitcodeModule</tt>, and pass their <tt>Module</tt> to
792functions that used to accept <tt>ModuleProvider</tt>. Clients who
793wrote their own <tt>ModuleProvider</tt>s will need to derive from
794<tt>GVMaterializer</tt> instead and use
795<tt>Module::setMaterializer</tt> to attach it to a
796<tt>Module</tt>.</li>
797
798<li><tt>GhostLinkage</tt> has given up the ghost.
799<tt>GlobalValue</tt>s that have not yet been read from their backing
800storage have the same linkage they will have after being read in.
801Clients must replace calls to
802<tt>GlobalValue::hasNotBeenReadFromBitcode</tt> with
803<tt>GlobalValue::isMaterializable</tt>.</li>
Daniel Dunbar61f41422010-02-10 04:09:52 +0000[diff] [blame]804
805<li>FIXME: Debug info has been totally redone. Add pointers to new APIs. Substantial caveats about compatibility of .ll and .bc files.</li>
806
Daniel Dunbar369889a2010-02-14 01:47:19 +0000[diff] [blame]807<li>The <tt>llvm/Support/DataTypes.h</tt> header has moved
808to <tt>llvm/System/DataTypes.h</tt>.</li>
809
Duncan Sandsdd29fc82010-02-17 17:20:17 +0000[diff] [blame]810<li>The <tt>isInteger</tt>, <tt>isIntOrIntVector</tt>, <tt>isFloatingPoint</tt>,
811<tt>isFPOrFPVector</tt> and <tt>isFPOrFPVector</tt> methods have been renamed
812<tt>isIntegerTy</tt>, <tt>isIntOrIntVectorTy</tt>, <tt>isFloatingPointTy</tt>,
813<tt>isFPOrFPVectorTy</tt> and <tt>isFPOrFPVectorTy</tt> respectively.</li>
Devang Patel0e3da1a2008-10-14 20:03:43 +0000[diff] [blame]814</ul>
Chris Lattner92eacf82008-10-13 17:57:36 +0000[diff] [blame]815
Chris Lattner92eacf82008-10-13 17:57:36 +0000[diff] [blame]816</div>
817
818
819
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]820<!-- *********************************************************************** -->
821<div class="doc_section">
822 <a name="portability">Portability and Supported Platforms</a>
823</div>
824<!-- *********************************************************************** -->
825
826<div class="doc_text">
827
828<p>LLVM is known to work on the following platforms:</p>
829
830<ul>
Mikhail Glushenkovf61066a2009-03-01 18:09:47 +0000[diff] [blame]831<li>Intel and AMD machines (IA32, X86-64, AMD64, EMT-64) running Red Hat
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]832 Linux, Fedora Core, FreeBSD and AuroraUX (and probably other unix-like
833 systems).</li>
Mikhail Glushenkovf61066a2009-03-01 18:09:47 +0000[diff] [blame]834<li>PowerPC and X86-based Mac OS X systems, running 10.3 and above in 32-bit
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]835 and 64-bit modes.</li>
Chris Lattnere0798082008-02-06 18:00:06 +0000[diff] [blame]836<li>Intel and AMD machines running on Win32 using MinGW libraries (native).</li>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]837<li>Intel and AMD machines running on Win32 with the Cygwin libraries (limited
838 support is available for native builds with Visual C++).</li>
Chris Lattner9235ce52009-10-16 16:30:58 +0000[diff] [blame]839<li>Sun x86 and AMD64 machines running Solaris 10, OpenSolaris 0906.</li>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]840<li>Alpha-based machines running Debian GNU/Linux.</li>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]841</ul>
842
Chris Lattnerba948522008-06-05 06:57:39 +0000[diff] [blame]843<p>The core LLVM infrastructure uses GNU autoconf to adapt itself
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]844to the machine and operating system on which it is built. However, minor
845porting may be required to get LLVM to work on new platforms. We welcome your
846portability patches and reports of successful builds or error messages.</p>
847
848</div>
849
850<!-- *********************************************************************** -->
851<div class="doc_section">
852 <a name="knownproblems">Known Problems</a>
853</div>
854<!-- *********************************************************************** -->
855
856<div class="doc_text">
857
Mikhail Glushenkovf61066a2009-03-01 18:09:47 +0000[diff] [blame]858<p>This section contains significant known problems with the LLVM system,
Chris Lattnerb1ad47c2008-11-10 05:40:34 +0000[diff] [blame]859listed by component. If you run into a problem, please check the <a
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]860href="http://llvm.org/bugs/">LLVM bug database</a> and submit a bug if
861there isn't already one.</p>
862
Chris Lattner1f8dc512010-03-17 17:25:49 +0000[diff] [blame]863<ul>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]864<li>LLVM will not correctly compile on Solaris and/or OpenSolaris
865using the stock GCC 3.x.x series 'out the box',
Chris Lattnerc09ffd22009-11-03 21:50:09 +0000[diff] [blame]866See: <a href="GettingStarted.html#brokengcc">Broken versions of GCC and other tools</a>.
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]867However, A <a href="http://pkg.auroraux.org/GCC">Modern GCC Build</a>
868for x86/x86-64 has been made available from the third party AuroraUX Project
869that has been meticulously tested for bootstrapping LLVM &amp; Clang.</li>
870</ul>
871
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]872</div>
873
874<!-- ======================================================================= -->
875<div class="doc_subsection">
876 <a name="experimental">Experimental features included with this release</a>
877</div>
878
879<div class="doc_text">
880
881<p>The following components of this LLVM release are either untested, known to
882be broken or unreliable, or are in early development. These components should
883not be relied on, and bugs should not be filed against them, but they may be
884useful to some people. In particular, if you would like to work on one of these
Chris Lattnerdaeb3232008-02-12 06:29:45 +0000[diff] [blame]885components, please contact us on the <a
886href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVMdev list</a>.</p>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]887
888<ul>
Wesley Peckbe6dc822010-03-18 14:31:30 +0000[diff] [blame]889<li>The MSIL, Alpha, SPU, MIPS, PIC16, Blackfin, MSP430, SystemZ and MicroBlaze
890 backends are experimental.</li>
Bill Wendling9c7c4382009-03-02 07:54:14 +0000[diff] [blame]891<li>The <tt>llc</tt> "<tt>-filetype=asm</tt>" (the default) is the only
Chris Lattner58b1d0f2010-03-17 04:41:49 +0000[diff] [blame]892 supported value for this option. The MachO writer is experimental, and
893 works much better in mainline SVN.</li>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]894</ul>
895
896</div>
897
898<!-- ======================================================================= -->
899<div class="doc_subsection">
900 <a name="x86-be">Known problems with the X86 back-end</a>
901</div>
902
903<div class="doc_text">
904
905<ul>
Anton Korobeynikov77d15e22008-06-08 10:24:13 +0000[diff] [blame]906 <li>The X86 backend does not yet support
907 all <a href="http://llvm.org/PR879">inline assembly that uses the X86
908 floating point stack</a>. It supports the 'f' and 't' constraints, but not
909 'u'.</li>
Chris Lattnerd95b5962008-06-08 21:19:07 +0000[diff] [blame]910 <li>The X86 backend generates inefficient floating point code when configured
911 to generate code for systems that don't have SSE2.</li>
Duncan Sands8b4f3772008-06-08 19:38:43 +0000[diff] [blame]912 <li>Win64 code generation wasn't widely tested. Everything should work, but we
John Criswellaea8c752009-03-02 15:28:15 +0000[diff] [blame]913 expect small issues to happen. Also, llvm-gcc cannot build the mingw64
914 runtime currently due
Anton Korobeynikov77d15e22008-06-08 10:24:13 +0000[diff] [blame]915 to <a href="http://llvm.org/PR2255">several</a>
John Criswellaea8c752009-03-02 15:28:15 +0000[diff] [blame]916 <a href="http://llvm.org/PR2257">bugs</a> and due to lack of support for
917 the
918 'u' inline assembly constraint and for X87 floating point inline assembly.</li>
Dan Gohman3882ecb2008-06-08 23:05:11 +0000[diff] [blame]919 <li>The X86-64 backend does not yet support the LLVM IR instruction
Chris Lattner47202c32009-03-02 02:37:32 +0000[diff] [blame]920 <tt>va_arg</tt>. Currently, the llvm-gcc and front-ends support variadic
Dan Gohman3882ecb2008-06-08 23:05:11 +0000[diff] [blame]921 argument constructs on X86-64 by lowering them manually.</li>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]922</ul>
923
924</div>
925
926<!-- ======================================================================= -->
927<div class="doc_subsection">
928 <a name="ppc-be">Known problems with the PowerPC back-end</a>
929</div>
930
931<div class="doc_text">
932
933<ul>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]934<li>The Linux PPC32/ABI support needs testing for the interpreter and static
935compilation, and lacks support for debug information.</li>
936</ul>
937
938</div>
939
940<!-- ======================================================================= -->
941<div class="doc_subsection">
942 <a name="arm-be">Known problems with the ARM back-end</a>
943</div>
944
945<div class="doc_text">
946
947<ul>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]948<li>Support for the Advanced SIMD (Neon) instruction set is still incomplete
949and not well tested. Some features may not work at all, and the code quality
950may be poor in some cases.</li>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]951<li>Thumb mode works only on ARMv6 or higher processors. On sub-ARMv6
Duncan Sands1827fa62007-09-26 15:59:54 +0000[diff] [blame]952processors, thumb programs can crash or produce wrong
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]953results (<a href="http://llvm.org/PR1388">PR1388</a>).</li>
John Criswellaea8c752009-03-02 15:28:15 +0000[diff] [blame]954<li>Compilation for ARM Linux OABI (old ABI) is supported but not fully tested.
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]955</li>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]956</ul>
957
958</div>
959
960<!-- ======================================================================= -->
961<div class="doc_subsection">
962 <a name="sparc-be">Known problems with the SPARC back-end</a>
963</div>
964
965<div class="doc_text">
966
967<ul>
John Criswellaea8c752009-03-02 15:28:15 +0000[diff] [blame]968<li>The SPARC backend only supports the 32-bit SPARC ABI (-m32); it does not
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]969 support the 64-bit SPARC ABI (-m64).</li>
970</ul>
971
972</div>
973
974<!-- ======================================================================= -->
975<div class="doc_subsection">
Bruno Cardoso Lopes62d45d72008-10-25 14:56:26 +0000[diff] [blame]976 <a name="mips-be">Known problems with the MIPS back-end</a>
977</div>
978
979<div class="doc_text">
980
981<ul>
Bruno Cardoso Lopes62d45d72008-10-25 14:56:26 +0000[diff] [blame]982<li>64-bit MIPS targets are not supported yet.</li>
983</ul>
984
985</div>
986
987<!-- ======================================================================= -->
988<div class="doc_subsection">
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]989 <a name="alpha-be">Known problems with the Alpha back-end</a>
990</div>
991
992<div class="doc_text">
993
994<ul>
995
996<li>On 21164s, some rare FP arithmetic sequences which may trap do not have the
997appropriate nops inserted to ensure restartability.</li>
998
999</ul>
1000</div>
1001
1002<!-- ======================================================================= -->
1003<div class="doc_subsection">
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]1004 <a name="c-be">Known problems with the C back-end</a>
1005</div>
1006
1007<div class="doc_text">
1008
1009<ul>
Chris Lattner499c07c2008-06-05 06:35:40 +0000[diff] [blame]1010<li><a href="http://llvm.org/PR802">The C backend has only basic support for
1011 inline assembly code</a>.</li>
Chris Lattnere0194462007-09-26 06:01:35 +0000[diff] [blame]1012<li><a href="http://llvm.org/PR1658">The C backend violates the ABI of common
1013 C++ programs</a>, preventing intermixing between C++ compiled by the CBE and
Gabor Greife33c5322009-03-02 12:02:51 +0000[diff] [blame]1014 C++ code compiled with <tt>llc</tt> or native compilers.</li>
Duncan Sandsbd0ad6e2008-02-10 13:40:55 +0000[diff] [blame]1015<li>The C backend does not support all exception handling constructs.</li>
Duncan Sandse6e264c2009-02-25 11:51:54 +0000[diff] [blame]1016<li>The C backend does not support arbitrary precision integers.</li>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]1017</ul>
1018
1019</div>
1020
1021
1022<!-- ======================================================================= -->
1023<div class="doc_subsection">
Chris Lattner58b1d0f2010-03-17 04:41:49 +0000[diff] [blame]1024 <a name="c-fe">Known problems with the llvm-gcc C and C++ front-end</a>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]1025</div>
1026
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]1027<div class="doc_text">
1028
Chris Lattner499c07c2008-06-05 06:35:40 +0000[diff] [blame]1029<p>The only major language feature of GCC not supported by llvm-gcc is
1030 the <tt>__builtin_apply</tt> family of builtins. However, some extensions
1031 are only supported on some targets. For example, trampolines are only
Duncan Sandsa73561c2008-06-08 20:18:35 +0000[diff] [blame]1032 supported on some targets (these are used when you take the address of a
1033 nested function).</p>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]1034
Chris Lattner499c07c2008-06-05 06:35:40 +0000[diff] [blame]1035<p>If you run into GCC extensions which are not supported, please let us know.
1036</p>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]1037
1038</div>
1039
1040<!-- ======================================================================= -->
1041<div class="doc_subsection">
Chris Lattner6c8a1b82008-10-30 03:58:13 +0000[diff] [blame]1042 <a name="fortran-fe">Known problems with the llvm-gcc Fortran front-end</a>
1043</div>
1044
1045<div class="doc_text">
Gabor Greif1fc8fbc2008-11-04 21:50:59 +0000[diff] [blame]1046<ul>
Chris Lattner6c8a1b82008-10-30 03:58:13 +0000[diff] [blame]1047<li>Fortran support generally works, but there are still several unresolved bugs
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]1048 in <a href="http://llvm.org/bugs/">Bugzilla</a>. Please see the
1049 tools/gfortran component for details.</li>
Gabor Greif1fc8fbc2008-11-04 21:50:59 +0000[diff] [blame]1050</ul>
Chris Lattner6c8a1b82008-10-30 03:58:13 +0000[diff] [blame]1051</div>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]1052
Chris Lattnerdaeb3232008-02-12 06:29:45 +0000[diff] [blame]1053<!-- ======================================================================= -->
1054<div class="doc_subsection">
Chris Lattner499c07c2008-06-05 06:35:40 +0000[diff] [blame]1055 <a name="ada-fe">Known problems with the llvm-gcc Ada front-end</a>
Chris Lattnerdaeb3232008-02-12 06:29:45 +0000[diff] [blame]1056</div>
1057
1058<div class="doc_text">
John Criswellaea8c752009-03-02 15:28:15 +0000[diff] [blame]1059The llvm-gcc 4.2 Ada compiler works fairly well; however, this is not a mature
1060technology, and problems should be expected.
Chris Lattnerdaeb3232008-02-12 06:29:45 +0000[diff] [blame]1061<ul>
Duncan Sandsa73561c2008-06-08 20:18:35 +0000[diff] [blame]1062<li>The Ada front-end currently only builds on X86-32. This is mainly due
John Criswellaea8c752009-03-02 15:28:15 +0000[diff] [blame]1063to lack of trampoline support (pointers to nested functions) on other platforms.
1064However, it <a href="http://llvm.org/PR2006">also fails to build on X86-64</a>
Chris Lattnerdaeb3232008-02-12 06:29:45 +0000[diff] [blame]1065which does support trampolines.</li>
1066<li>The Ada front-end <a href="http://llvm.org/PR2007">fails to bootstrap</a>.
Duncan Sandsf73473e2009-02-25 11:59:06 +0000[diff] [blame]1067This is due to lack of LLVM support for <tt>setjmp</tt>/<tt>longjmp</tt> style
1068exception handling, which is used internally by the compiler.
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]1069Workaround: configure with <tt>--disable-bootstrap</tt>.</li>
Duncan Sands2dbc2e82008-10-13 17:27:23 +0000[diff] [blame]1070<li>The c380004, <a href="http://llvm.org/PR2010">c393010</a>
1071and <a href="http://llvm.org/PR2421">cxg2021</a> ACATS tests fail
Duncan Sandsf73473e2009-02-25 11:59:06 +0000[diff] [blame]1072(c380004 also fails with gcc-4.2 mainline).
1073If the compiler is built with checks disabled then <a href="http://llvm.org/PR2010">c393010</a>
1074causes the compiler to go into an infinite loop, using up all system memory.</li>
Duncan Sandsc2a29a02009-03-02 16:35:57 +0000[diff] [blame]1075<li>Some GCC specific Ada tests continue to crash the compiler.</li>
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]1076<li>The <tt>-E</tt> binder option (exception backtraces)
Chris Lattnerdaeb3232008-02-12 06:29:45 +0000[diff] [blame]1077<a href="http://llvm.org/PR1982">does not work</a> and will result in programs
Chris Lattner0b6ea7a2009-10-13 17:48:04 +0000[diff] [blame]1078crashing if an exception is raised. Workaround: do not use <tt>-E</tt>.</li>
Chris Lattnerdaeb3232008-02-12 06:29:45 +0000[diff] [blame]1079<li>Only discrete types <a href="http://llvm.org/PR1981">are allowed to start
1080or finish at a non-byte offset</a> in a record. Workaround: do not pack records
1081or use representation clauses that result in a field of a non-discrete type
1082starting or finishing in the middle of a byte.</li>
Chris Lattnerd95b5962008-06-08 21:19:07 +0000[diff] [blame]1083<li>The <tt>lli</tt> interpreter <a href="http://llvm.org/PR2009">considers
1084'main' as generated by the Ada binder to be invalid</a>.
1085Workaround: hand edit the file to use pointers for <tt>argv</tt> and
1086<tt>envp</tt> rather than integers.</li>
1087<li>The <tt>-fstack-check</tt> option <a href="http://llvm.org/PR2008">is
1088ignored</a>.</li>
Chris Lattnerdaeb3232008-02-12 06:29:45 +0000[diff] [blame]1089</ul>
1090</div>
1091
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]1092<!-- *********************************************************************** -->
1093<div class="doc_section">
1094 <a name="additionalinfo">Additional Information</a>
1095</div>
1096<!-- *********************************************************************** -->
1097
1098<div class="doc_text">
1099
1100<p>A wide variety of additional information is available on the <a
1101href="http://llvm.org">LLVM web page</a>, in particular in the <a
1102href="http://llvm.org/docs/">documentation</a> section. The web page also
1103contains versions of the API documentation which is up-to-date with the
1104Subversion version of the source code.
1105You can access versions of these documents specific to this release by going
1106into the "<tt>llvm/doc/</tt>" directory in the LLVM tree.</p>
1107
1108<p>If you have any questions or comments about LLVM, please feel free to contact
1109us via the <a href="http://llvm.org/docs/#maillist"> mailing
1110lists</a>.</p>
1111
1112</div>
1113
1114<!-- *********************************************************************** -->
1115
1116<hr>
1117<address>
1118 <a href="http://jigsaw.w3.org/css-validator/check/referer"><img
Misha Brukman947321d2008-12-11 17:34:48 +0000[diff] [blame]1119 src="http://jigsaw.w3.org/css-validator/images/vcss-blue" alt="Valid CSS"></a>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]1120 <a href="http://validator.w3.org/check/referer"><img
Misha Brukman947321d2008-12-11 17:34:48 +0000[diff] [blame]1121 src="http://www.w3.org/Icons/valid-html401-blue" alt="Valid HTML 4.01"></a>
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000[diff] [blame]1122
1123 <a href="http://llvm.org/">LLVM Compiler Infrastructure</a><br>
1124 Last modified: $Date$
1125</address>
1126
1127</body>
1128</html>