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Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
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Chris Lattner1a7e43c2004-04-01 00:41:31 +0000[diff] [blame]6 <title>LLVM 1.3 Release Notes</title>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]7</head>
8<body>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]9
Chris Lattner1a7e43c2004-04-01 00:41:31 +0000[diff] [blame]10<div class="doc_title">LLVM 1.3 Release Notes</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]11
12<ol>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]13 <li><a href="#intro">Introduction</a></li>
14 <li><a href="#whatsnew">What's New?</a></li>
15 <li><a href="#portability">Portability and Supported Platforms</a></li>
16 <li><a href="#install-instructions">Installation Instructions</a></li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]17 <li><a href="#knownproblems">Known Problems</a>
18 <ul>
Chris Lattner1a7e43c2004-04-01 00:41:31 +0000[diff] [blame]19 <li><a href="#experimental">Experimental features included in this
20 release</a>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]21 <li><a href="#core">Known problems with the LLVM Core</a>
22 <li><a href="#c-fe">Known problems with the C Front-end</a>
23 <li><a href="#c++-fe">Known problems with the C++ Front-end</a>
24 <li><a href="#x86-be">Known problems with the X86 Back-end</a>
25 <li><a href="#sparc-be">Known problems with the Sparc Back-end</a>
26 <li><a href="#c-be">Known problems with the C back-end</a>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]27 </ul></li>
28 <li><a href="#additionalinfo">Additional Information</a></li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]29</ol>
30
Misha Brukman7cb4e382003-11-22 01:00:11 +0000[diff] [blame]31<div class="doc_text">
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]32 <p><b>Written by the <a href="http://llvm.cs.uiuc.edu">LLVM team</a></b><p>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]33</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]34
35<!-- *********************************************************************** -->
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]36<div class="doc_section">
37 <a name="intro">Introduction</a>
38</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]39<!-- *********************************************************************** -->
40
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]41<div class="doc_text">
42
43<p>This document contains the release notes for the LLVM compiler
Chris Lattner1a7e43c2004-04-01 00:41:31 +0000[diff] [blame]44infrastructure, release 1.3. Here we describe the status of LLVM, including any
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]45known problems and bug fixes from the previous release. The most up-to-date
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]46version of this document can be found on the <a
Chris Lattner1a7e43c2004-04-01 00:41:31 +0000[diff] [blame]47href="http://llvm.cs.uiuc.edu/releases/1.3/">LLVM 1.3 web site</a>. If you are
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]48not reading this on the LLVM web pages, you should probably go there because
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]49this document may be updated after the release.</p>
Chris Lattner62495762003-10-02 16:38:05 +0000[diff] [blame]50
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]51<p>For more information about LLVM, including information about potentially more
Chris Lattnere7525b52003-10-07 21:38:31 +0000[diff] [blame]52current releases, please check out the <a href="http://llvm.cs.uiuc.edu">main
53web site</a>. If you have questions or comments, the <a
54href="http://mail.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVM developer's mailing
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]55list</a> is a good place to send them.</p>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]56
Chris Lattnere76e9ab2003-12-12 04:25:33 +0000[diff] [blame]57<p>Note that if you are reading this file from CVS, this document applies
58to the <i>next</i> release, not the current one. To see the release notes for
59the current or previous releases, see the <a
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]60href="http://llvm.cs.uiuc.edu/releases/">releases page</a>.</p>
61
62</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]63
64<!-- *********************************************************************** -->
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]65<div class="doc_section">
66 <a name="whatsnew">What's New?</a>
67</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]68<!-- *********************************************************************** -->
69
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]70<div class="doc_text">
71
Chris Lattner8ebf2532004-02-25 16:36:51 +0000[diff] [blame]72<p>
Chris Lattner1a7e43c2004-04-01 00:41:31 +0000[diff] [blame]73This is the fourth public release of the LLVM compiler infrastructure.
Chris Lattner5a8a7282003-12-14 05:03:43 +0000[diff] [blame]74</p>
Chris Lattnerba7bd472003-12-06 20:22:41 +0000[diff] [blame]75
Chris Lattner28202352004-03-17 03:54:41 +0000[diff] [blame]76<p>
77At this time, LLVM is known to correctly compile and run all C &amp; C++ SPEC
78CPU2000 benchmarks, the Olden benchmarks, and the Ptrdist benchmarks. It has
79also been used to compile <b>many</b> other programs. LLVM now also works with
80a broad variety of C++ programs, though it has still received less testing than
81the C front-end.
Chris Lattnerba7bd472003-12-06 20:22:41 +0000[diff] [blame]82</p>
83
Chris Lattnerba7bd472003-12-06 20:22:41 +0000[diff] [blame]84<!--=========================================================================-->
85<div class="doc_subsubsection">
Chris Lattner8ebf2532004-02-25 16:36:51 +0000[diff] [blame]86<a name="newfeatures">This release implements the following new features:</a>
Chris Lattnerba7bd472003-12-06 20:22:41 +0000[diff] [blame]87</div>
Chris Lattnere7525b52003-10-07 21:38:31 +0000[diff] [blame]88
89<ol>
Chris Lattner1a7e43c2004-04-01 00:41:31 +0000[diff] [blame]90<li>The LLVM <a href="LangRef.html#i_select"><tt>select</tt></a> instruction is
Brian Gaeke86a6c752004-04-20 18:18:46 +0000[diff] [blame^]91now fully implemented and supported by all targets, including
92<a href="http://llvm.cs.uiuc.edu/PR322">interpreter support.</a></li>
Misha Brukman017f2f32004-04-19 02:56:49 +0000[diff] [blame]93<li>Bugpoint can now narrow down code-generation bugs to a loop nest, where
94before it could only narrow them down to a function being miscompiled.</li>
Chris Lattner592db402003-11-19 22:05:38 +0000[diff] [blame]95</ol>
Chris Lattner4491de62003-11-08 04:28:55 +0000[diff] [blame]96
Chris Lattnerba7bd472003-12-06 20:22:41 +0000[diff] [blame]97
98<!--=========================================================================-->
99<div class="doc_subsubsection">
100In this release, the following missing features were implemented:
101</div>
Chris Lattner4491de62003-11-08 04:28:55 +0000[diff] [blame]102
103<ol>
Misha Brukman017f2f32004-04-19 02:56:49 +0000[diff] [blame]104<li><a href="http://llvm.cs.uiuc.edu/PR82">LLVM cannot handle structures with
105more than 256 elements</a></li>
Misha Brukmane7050232004-04-19 03:01:01 +0000[diff] [blame]106<li><a href="http://llvm.cs.uiuc.edu/PR38">[bugpoint] External functions used in
107non-instruction entities, such as global constant initializer</a></li>
108<li><a href="http://llvm.cs.uiuc.edu/PR290">Bugpoint doesn't support
109uses of external fns by immediate constant exprs</a></li>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]110</ol>
Chris Lattnere7525b52003-10-07 21:38:31 +0000[diff] [blame]111
Chris Lattnerba7bd472003-12-06 20:22:41 +0000[diff] [blame]112
113<!--=========================================================================-->
114<div class="doc_subsubsection">
Misha Brukman017f2f32004-04-19 02:56:49 +0000[diff] [blame]115<a name="qualityofimp">In this release, the following Quality of Implementation
116issues were fixed:</a>
Chris Lattner4df78f02003-12-20 03:42:11 +0000[diff] [blame]117</div>
118
119<ol>
Misha Brukman017f2f32004-04-19 02:56:49 +0000[diff] [blame]120<li><a href="http://llvm.cs.uiuc.edu/PR305">LLVM tools will happily spew
121bytecode onto your terminal</a></li>
Chris Lattner4df78f02003-12-20 03:42:11 +0000[diff] [blame]122</ol>
123
124<!--=========================================================================-->
125<div class="doc_subsubsection">
Chris Lattner8ebf2532004-02-25 16:36:51 +0000[diff] [blame]126In this release, the following build problems were fixed:
Brian Gaeke8b05e4f2004-01-16 21:55:04 +0000[diff] [blame]127</div>
128
129<ol>
Brian Gaeke86a6c752004-04-20 18:18:46 +0000[diff] [blame^]130<li><a href="http://llvm.cs.uiuc.edu/PR301">Minor configure bugs with -disable/enable-povray and -disable-spec</a></li>
Brian Gaeke8b05e4f2004-01-16 21:55:04 +0000[diff] [blame]131</ol>
132
133<!--=========================================================================-->
134<div class="doc_subsubsection">
Misha Brukman017f2f32004-04-19 02:56:49 +0000[diff] [blame]135<a name="codequality">In this release, the following Code Quality issues were
136fixed:</a>
Chris Lattnerba7bd472003-12-06 20:22:41 +0000[diff] [blame]137</div>
Chris Lattner639579c2003-10-27 17:06:39 +0000[diff] [blame]138
139<ol>
Chris Lattner54dcea82004-04-13 14:43:35 +0000[diff] [blame]140<li><a href="http://llvm.cs.uiuc.edu/PR309">[vmcore] Code quality problem due to
141long operand of getelementptr</a></li>
142
143<li>The X86 backend now generates substantially better code for 64-bit integer
144and floating point operations.</li>
145
146<li>The -inline pass no longer inlines mutually recursive functions until it
147hits the inlining threshold.</li>
148
149<li>The -inline pass no longer misses obvious inlining opportunities just
150because the callee eventually calls into an external function.</li>
151
152<li>The -simplifycfg pass can now "if convert" simple statements into the new
153<tt>select</tt> instruction.</li>
154
155<li>The -loopsimplify pass can now break <a
156href="http://llvm.cs.uiuc.edu/PR35">natural loops with multiple backedges</a>
157into multiple nested loops. This enables a variety of subsequent
158optimizations.</li>
159
160<li>The -adce pass can now eliminate calls to functions that do not not write to
161memory.</li>
162
163<li>The link-time optimizer now runs the -prune-eh pass (to remove unused
164exception handlers.</li>
165
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]166</ol>
Chris Lattner639579c2003-10-27 17:06:39 +0000[diff] [blame]167
Chris Lattnerba7bd472003-12-06 20:22:41 +0000[diff] [blame]168
169<!--=========================================================================-->
170<div class="doc_subsubsection">
Misha Brukman017f2f32004-04-19 02:56:49 +0000[diff] [blame]171<a name="bugfix">In this release, the following bugs in the previous release
172were fixed:</a>
Chris Lattnerba7bd472003-12-06 20:22:41 +0000[diff] [blame]173</div>
174
175<p>Bugs in the LLVM Core:</p>
Chris Lattnere7525b52003-10-07 21:38:31 +0000[diff] [blame]176
177<ol>
Misha Brukman017f2f32004-04-19 02:56:49 +0000[diff] [blame]178<li><a href="http://llvm.cs.uiuc.edu/PR306">[loopsimplify] Loop simplify
179incorrectly updates dominator information</a></li>
180<li><a href="http://llvm.cs.uiuc.edu/PR310">[tailduplicate] DemoteRegToStack
181breaks SSA form</a></li>
182<li><a href="http://llvm.cs.uiuc.edu/PR313">[X86] JIT miscompiles unsigned short
183to floating point cast</a></li>
Chris Lattnerba7bd472003-12-06 20:22:41 +0000[diff] [blame]184</ol>
185
186
Chris Lattner24fa5662004-02-09 21:22:51 +0000[diff] [blame]187
Chris Lattnerba7bd472003-12-06 20:22:41 +0000[diff] [blame]188<p>Bugs in the C/C++ front-end:</p>
189
190<ol>
Chris Lattner1a7e43c2004-04-01 00:41:31 +0000[diff] [blame]191<li></li>
Chris Lattnerba7bd472003-12-06 20:22:41 +0000[diff] [blame]192</ol>
Chris Lattner62495762003-10-02 16:38:05 +0000[diff] [blame]193
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]194</div>
Chris Lattner62495762003-10-02 16:38:05 +0000[diff] [blame]195
196<!-- *********************************************************************** -->
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]197<div class="doc_section">
198 <a name="portability">Portability and Supported Platforms</a>
199</div>
Chris Lattner62495762003-10-02 16:38:05 +0000[diff] [blame]200<!-- *********************************************************************** -->
201
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]202<div class="doc_text">
203
204<p>LLVM has been extensively tested on Intel and AMD machines running Red
Misha Brukman017f2f32004-04-19 02:56:49 +0000[diff] [blame]205Hat Linux and FreeBSD. It has also been tested on Sun UltraSPARC workstations
206running Solaris 8. Additionally, LLVM works on Mac OS X 10.3 and above, but
207only with the C backend or interpreter (no native backend for the PowerPC is
208available yet). The core LLVM infrastructure uses "autoconf" for portability,
209so hopefully we work on more platforms than that. However, it is likely that we
210missed something and that minor porting is required to get LLVM to work on new
211platforms. We welcome portability patches and error messages.</p>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]212
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]213</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]214
Brian Gaeke86a6c752004-04-20 18:18:46 +0000[diff] [blame^]215<!--=========================================================================-->
216<div class="doc_subsection">
217In this release, the following portability problems were fixed:
218</div>
219
220<ol>
221<li><a href="http://llvm.cs.uiuc.edu/PR304">warnings compiling Stacker compiler on Mac OS X</a></li>
222<li><a href="http://llvm.cs.uiuc.edu/PR308">getObjectType doesn't understand abbreviated names in headers</a></li>
223</ol>
224
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]225<!-- *********************************************************************** -->
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]226<div class="doc_section">
227 <a name="knownproblems">Known Problems</a>
228</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]229<!-- *********************************************************************** -->
230
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]231<div class="doc_text">
232
233<p>This section contains all known problems with the LLVM system, listed by
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]234component. As new problems are discovered, they will be added to these
Chris Lattnerb84f3322003-12-12 21:22:16 +0000[diff] [blame]235sections. If you run into a problem, please check the <a
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]236href="http://llvm.cs.uiuc.edu/bugs/">LLVM bug database</a> and submit a bug if
Chris Lattnerb84f3322003-12-12 21:22:16 +0000[diff] [blame]237there isn't already one.</p>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]238
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]239</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]240
Chris Lattnerb911de42004-03-14 02:03:02 +0000[diff] [blame]241<!-- ======================================================================= -->
242<div class="doc_subsection">
243 <a name="experimental">Experimental features included with this release</a>
244</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]245
Chris Lattnerb911de42004-03-14 02:03:02 +0000[diff] [blame]246<div class="doc_text">
247
248<p>
249The following components of this LLVM release are either untested, known to be
250broken or unreliable, or are in early development. These components should not
251be relied on, and bugs should not be filed against them, but they may be useful
252to some people. In particular, if you would like to work on one of these
253components, please contact us on the llvmdev list.
254</p>
255
256<ul>
257<li>The following passes are incomplete or buggy: <tt>-pgmdep, -memdep,
258 -ipmodref, -sortstructs, -swapstructs, -cee</tt></li>
259
260<li>The <tt>-pre</tt> pass is incomplete (there are cases it doesn't handle that
261 it should) and not thoroughly tested.</li>
262<li>The <tt>llvm-ar</tt> tool is incomplete and probably buggy.</li>
263<li>The <tt>llvm-db</tt> tool is in a very early stage of development.</li>
264</ul>
265
266</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]267
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]268<!-- ======================================================================= -->
269<div class="doc_subsection">
270 <a name="core">Known problems with the LLVM Core</a>
271</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]272
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]273<div class="doc_text">
274
275<ul>
276
277<li>In the JIT, <tt>dlsym</tt> on a symbol compiled by the JIT will not
278work.</li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]279
280<li>The JIT does not use mutexes to protect its internal data structures. As
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]281such, execution of a threaded program could cause these data structures to be
282corrupted.</li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]283
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]284<li>It is not possible to <tt>dlopen</tt> an LLVM bytecode file in the JIT.</li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]285
Chris Lattnera623e482003-10-20 19:05:03 +0000[diff] [blame]286<li>Linking in static archive files (.a files) is very slow (there is no symbol
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]287table in the archive).</li>
Chris Lattnerc679fbb2003-11-04 20:06:53 +0000[diff] [blame]288
Misha Brukman017f2f32004-04-19 02:56:49 +0000[diff] [blame]289<li>The gccld program <a href="http://llvm.cs.uiuc.edu/PR139">does not link
290objects/archives in the order specified on the command line.</a></li>
Chris Lattneraebc66a2004-02-15 23:09:07 +0000[diff] [blame]291
292<li><a href="http://llvm.cs.uiuc.edu/PR240">The lower-invoke pass does not mark
John Criswell5d6345a2004-03-12 21:29:42 +0000[diff] [blame]293values live across a setjmp as volatile</a>. This missing feature only affects
Chris Lattneraebc66a2004-02-15 23:09:07 +0000[diff] [blame]294targets whose setjmp/longjmp libraries do not save and restore the entire
295register file.</li>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]296</ul>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]297</div>
298
299<!-- ======================================================================= -->
300<div class="doc_subsection">
301 <a name="c-fe">Known problems with the C front-end</a>
302</div>
Chris Lattner178f3db2003-10-02 05:07:23 +0000[diff] [blame]303
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]304<!-- _______________________________________________________________________ -->
Chris Lattner5a8a7282003-12-14 05:03:43 +0000[diff] [blame]305<div class="doc_subsubsection">Bugs</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]306
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]307<div class="doc_text">
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]308<ul>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]309<li>C99 Variable sized arrays do not release stack memory when they go out of
310 scope. Thus, the following program may run out of stack space:
311<pre>
312 for (i = 0; i != 1000000; ++i) {
313 int X[n];
314 foo(X);
315 }
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]316</pre></li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]317
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]318<li>
319Initialization of global union variables can only be done
320<a href="http://llvm.cs.uiuc.edu/bugs/show_bug.cgi?id=162">with the largest
321union member</a>.
322</li>
Chris Lattner1ab58dd2004-03-16 21:39:04 +0000[diff] [blame]323
Misha Brukman017f2f32004-04-19 02:56:49 +0000[diff] [blame]324<li><a href="http://llvm.cs.uiuc.edu/PR244">[llvm-gcc] Error when an implicitly
325external function is re-declared as static</a></li>
Chris Lattner1ab58dd2004-03-16 21:39:04 +0000[diff] [blame]326
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]327</ul>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]328</div>
329
330<!-- _______________________________________________________________________ -->
331<div class="doc_subsubsection">
332 Notes
333</div>
334
335<div class="doc_text">
336
337<ul>
338
339<li>Inline assembly is not yet supported.</li>
Chris Lattnerd2a74272003-10-27 18:30:37 +0000[diff] [blame]340
341<li>"long double" is transformed by the front-end into "double". There is no
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]342support for floating point data types of any size other than 32 and 64
343bits.</li>
344
345<li>The following Unix system functionality has not been tested and may not
346work:
Misha Brukman7cb4e382003-11-22 01:00:11 +0000[diff] [blame]347 <ol>
348 <li><tt>sigsetjmp</tt>, <tt>siglongjmp</tt> - These are not turned into the
349 appropriate <tt>invoke</tt>/<tt>unwind</tt> instructions. Note that
350 <tt>setjmp</tt> and <tt>longjmp</tt> <em>are</em> compiled correctly.
351 <li><tt>getcontext</tt>, <tt>setcontext</tt>, <tt>makecontext</tt>
352 - These functions have not been tested.
353 </ol></li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]354
355<li>Although many GCC extensions are supported, some are not. In particular,
356 the following extensions are known to <b>not be</b> supported:
357 <ol>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]358 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Local-Labels.html#Local%20Labels">Local Labels</a>: Labels local to a block.</li>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]359 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Nested-Functions.html#Nested%20Functions">Nested Functions</a>: As in Algol and Pascal, lexical scoping of functions.</li>
360 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Constructing-Calls.html#Constructing%20Calls">Constructing Calls</a>: Dispatching a call to another function.</li>
361 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html#Extended%20Asm">Extended Asm</a>: Assembler instructions with C expressions as operands.</li>
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]362 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Constraints.html#Constraints">Constraints</a>: Constraints for asm operands.</li>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]363 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Asm-Labels.html#Asm%20Labels">Asm Labels</a>: Specifying the assembler name to use for a C symbol.</li>
364 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Explicit-Reg-Vars.html#Explicit%20Reg%20Vars">Explicit Reg Vars</a>: Defining variables residing in specified registers.</li>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]365 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Vector-Extensions.html#Vector%20Extensions">Vector Extensions</a>: Using vector instructions through built-in functions.</li>
366 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Target-Builtins.html#Target%20Builtins">Target Builtins</a>: Built-in functions specific to particular targets.</li>
367 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Thread-Local.html#Thread-Local">Thread-Local</a>: Per-thread variables.</li>
368 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Pragmas.html#Pragmas">Pragmas</a>: Pragmas accepted by GCC.</li>
Misha Brukman7cb4e382003-11-22 01:00:11 +0000[diff] [blame]369 </ol>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]370
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]371 <p>The following GCC extensions are <b>partially</b> supported. An ignored
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]372 attribute means that the LLVM compiler ignores the presence of the attribute,
373 but the code should still work. An unsupported attribute is one which is
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]374 ignored by the LLVM compiler and will cause a different interpretation of
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]375 the program.</p>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]376
377 <ol>
378 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Variable-Length.html#Variable%20Length">Variable Length</a>:
379 Arrays whose length is computed at run time.<br>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]380 Supported, but allocated stack space is not freed until the function returns (noted above).</li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]381
382 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html#Function%20Attributes">Function Attributes</a>:
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]383
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]384 Declaring that functions have no side effects or that they can never
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]385 return.<br>
386
387 <b>Supported:</b> <tt>format</tt>, <tt>format_arg</tt>, <tt>non_null</tt>,
388 <tt>constructor</tt>, <tt>destructor</tt>, <tt>unused</tt>,
389 <tt>deprecated</tt>, <tt>warn_unused_result</tt>, <tt>weak</tt><br>
390
391 <b>Ignored:</b> <tt>noreturn</tt>, <tt>noinline</tt>,
392 <tt>always_inline</tt>, <tt>pure</tt>, <tt>const</tt>, <tt>nothrow</tt>,
393 <tt>malloc</tt>, <tt>no_instrument_function</tt>, <tt>cdecl</tt><br>
394
395 <b>Unsupported:</b> <tt>used</tt>, <tt>section</tt>, <tt>alias</tt>,
396 <tt>visibility</tt>, <tt>regparm</tt>, <tt>stdcall</tt>,
397 <tt>fastcall</tt>, all other target specific attributes</li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]398
399 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Variable-Attributes.html#Variable%20Attributes">Variable Attributes</a>:
400 Specifying attributes of variables.<br>
401 <b>Supported:</b> <tt>cleanup</tt>, <tt>common</tt>, <tt>nocommon</tt>,
402 <tt>deprecated</tt>, <tt>transparent_union</tt>,
403 <tt>unused</tt>, <tt>weak</tt><br>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]404
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]405 <b>Unsupported:</b> <tt>aligned</tt>, <tt>mode</tt>, <tt>packed</tt>,
406 <tt>section</tt>, <tt>shared</tt>, <tt>tls_model</tt>,
407 <tt>vector_size</tt>, <tt>dllimport</tt>,
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]408 <tt>dllexport</tt>, all target specific attributes.</li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]409
Misha Brukman8395d732003-12-12 04:37:31 +0000[diff] [blame]410 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Type-Attributes.html#Type%20Attributes">Type Attributes</a>: Specifying attributes of types.<br>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]411 <b>Supported:</b> <tt>transparent_union</tt>, <tt>unused</tt>,
Misha Brukman8395d732003-12-12 04:37:31 +0000[diff] [blame]412 <tt>deprecated</tt>, <tt>may_alias</tt><br>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]413
414 <b>Unsupported:</b> <tt>aligned</tt>, <tt>packed</tt>,
415 all target specific attributes.</li>
416
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]417 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html#Other%20Builtins">Other Builtins</a>:
418 Other built-in functions.<br>
419 We support all builtins which have a C language equivalent (e.g.,
420 <tt>__builtin_cos</tt>), <tt>__builtin_alloca</tt>,
421 <tt>__builtin_types_compatible_p</tt>, <tt>__builtin_choose_expr</tt>,
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]422 <tt>__builtin_constant_p</tt>, and <tt>__builtin_expect</tt> (ignored).</li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]423
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]424 </ol>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]425
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]426 <p>The following extensions <b>are</b> known to be supported:</p>
427
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]428 <ol>
Chris Lattnerd3dc8502004-03-16 08:54:07 +0000[diff] [blame]429 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html#Labels%20as%20Values">Labels as Values</a>: Getting pointers to labels and computed gotos.</li>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]430 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html#Statement%20Exprs">Statement Exprs</a>: Putting statements and declarations inside expressions.</li>
431 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Typeof.html#Typeof">Typeof</a>: <code>typeof</code>: referring to the type of an expression.</li>
432 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Lvalues.html#Lvalues">Lvalues</a>: Using <code>?:</code>, "<code>,</code>" and casts in lvalues.</li>
433 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Conditionals.html#Conditionals">Conditionals</a>: Omitting the middle operand of a <code>?:</code> expression.</li>
434 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Long-Long.html#Long%20Long">Long Long</a>: Double-word integers.</li>
435 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Complex.html#Complex">Complex</a>: Data types for complex numbers.</li>
436 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Hex-Floats.html#Hex%20Floats">Hex Floats</a>:Hexadecimal floating-point constants.</li>
437 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html#Zero%20Length">Zero Length</a>: Zero-length arrays.</li>
438 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Empty-Structures.html#Empty%20Structures">Empty Structures</a>: Structures with no members.</li>
439 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Variadic-Macros.html#Variadic%20Macros">Variadic Macros</a>: Macros with a variable number of arguments.</li>
440 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Escaped-Newlines.html#Escaped%20Newlines">Escaped Newlines</a>: Slightly looser rules for escaped newlines.</li>
441 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Subscripting.html#Subscripting">Subscripting</a>: Any array can be subscripted, even if not an lvalue.</li>
Misha Brukman8395d732003-12-12 04:37:31 +0000[diff] [blame]442 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Pointer-Arith.html#Pointer%20Arith">Pointer Arith</a>: Arithmetic on <code>void</code>-pointers and function pointers.</li>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]443 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Initializers.html#Initializers">Initializers</a>: Non-constant initializers.</li>
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]444 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Compound-Literals.html#Compound%20Literals">Compound Literals</a>: Compound literals give structures, unions,
445or arrays as values.</li>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]446 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Designated-Inits.html#Designated%20Inits">Designated Inits</a>: Labeling elements of initializers.</li>
Misha Brukman8395d732003-12-12 04:37:31 +0000[diff] [blame]447 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Cast-to-Union.html#Cast%20to%20Union">Cast to Union</a>: Casting to union type from any member of the union.</li>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]448 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Case-Ranges.html#Case%20Ranges">Case Ranges</a>: `case 1 ... 9' and such.</li>
449 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Mixed-Declarations.html#Mixed%20Declarations">Mixed Declarations</a>: Mixing declarations and code.</li>
450 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Function-Prototypes.html#Function%20Prototypes">Function Prototypes</a>: Prototype declarations and old-style definitions.</li>
451 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/C---Comments.html#C++%20Comments">C++ Comments</a>: C++ comments are recognized.</li>
452 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Dollar-Signs.html#Dollar%20Signs">Dollar Signs</a>: Dollar sign is allowed in identifiers.</li>
453 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Character-Escapes.html#Character%20Escapes">Character Escapes</a>: <code>\e</code> stands for the character &lt;ESC&gt;.</li>
454 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Alignment.html#Alignment">Alignment</a>: Inquiring about the alignment of a type or variable.</li>
455 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Inline.html#Inline">Inline</a>: Defining inline functions (as fast as macros).</li>
456 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Alternate-Keywords.html#Alternate%20Keywords">Alternate Keywords</a>:<code>__const__</code>, <code>__asm__</code>, etc., for header files.</li>
457 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Incomplete-Enums.html#Incomplete%20Enums">Incomplete Enums</a>: <code>enum foo;</code>, with details to follow.</li>
458 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Function-Names.html#Function%20Names">Function Names</a>: Printable strings which are the name of the current function.</li>
Chris Lattner3646dad2004-02-14 04:08:29 +0000[diff] [blame]459 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Return-Address.html#Return%20Address">Return Address</a>: Getting the return or frame address of a function.</li>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]460 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Unnamed-Fields.html#Unnamed%20Fields">Unnamed Fields</a>: Unnamed struct/union fields within structs/unions.</li>
461 <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Attribute-Syntax.html#Attribute%20Syntax">Attribute Syntax</a>: Formal syntax for attributes.</li>
Misha Brukman7cb4e382003-11-22 01:00:11 +0000[diff] [blame]462 </ol></li>
463
464</ul>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]465
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]466<p>If you run into GCC extensions which have not been included in any of these
467lists, please let us know (also including whether or not they work).</p>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]468
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]469</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]470
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]471<!-- ======================================================================= -->
472<div class="doc_subsection">
473 <a name="c++-fe">Known problems with the C++ front-end</a>
474</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]475
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]476<div class="doc_text">
477
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]478<p>For this release, the C++ front-end is considered to be fully functional but
Chris Lattnere76e9ab2003-12-12 04:25:33 +0000[diff] [blame]479has not been tested as thoroughly as the C front-end. It has been tested and
480works for a number of non-trivial programs, but there may be lurking bugs.
481Please report any bugs or problems.</p>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]482
483</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]484
485<!-- _______________________________________________________________________ -->
Chris Lattner141ebb62004-02-14 04:12:41 +0000[diff] [blame]486<div class="doc_subsubsection">Bugs</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]487
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]488<div class="doc_text">
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]489
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]490<ul>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]491<li>The C++ front-end inherits all problems afflicting the <a href="#c-fe">C
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]492 front-end</a>.</li>
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]493</ul>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]494</div>
495
496<!-- _______________________________________________________________________ -->
497<div class="doc_subsubsection">
498 Notes
499</div>
500
501<div class="doc_text">
502
503<ul>
Chris Lattnerd2a74272003-10-27 18:30:37 +0000[diff] [blame]504
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]505<li>The C++ front-end is based on a pre-release of the GCC 3.4 C++ parser. This
506parser is significantly more standards compliant (and picky) than prior GCC
507versions. For more information, see the C++ section of the <a
Chris Lattnere76e9ab2003-12-12 04:25:33 +0000[diff] [blame]508href="http://gcc.gnu.org/gcc-3.4/changes.html">GCC 3.4 release notes</a>.</li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]509
510<li>Destructors for local objects are not always run when a <tt>longjmp</tt> is
Chris Lattner62495762003-10-02 16:38:05 +0000[diff] [blame]511 performed. In particular, destructors for objects in the <tt>longjmp</tt>ing
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]512 function and in the <tt>setjmp</tt> receiver function may not be run.
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]513 Objects in intervening stack frames will be destroyed, however (which is
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]514 better than most compilers).</li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]515
Chris Lattner62495762003-10-02 16:38:05 +0000[diff] [blame]516<li>The LLVM C++ front-end follows the <a
517 href="http://www.codesourcery.com/cxx-abi">Itanium C++ ABI</a>.
518 This document, which is not Itanium specific, specifies a standard for name
519 mangling, class layout, v-table layout, RTTI formats, and other C++
520 representation issues. Because we use this API, code generated by the LLVM
521 compilers should be binary compatible with machine code generated by other
522 Itanium ABI C++ compilers (such as G++, the Intel and HP compilers, etc).
523 <i>However</i>, the exception handling mechanism used by LLVM is very
524 different from the model used in the Itanium ABI, so <b>exceptions will not
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]525 interact correctly</b>. </li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]526
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]527</ul>
Chris Lattner46ecf612003-10-07 22:14:37 +0000[diff] [blame]528
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]529</div>
530
531<!-- ======================================================================= -->
532<div class="doc_subsection">
533 <a name="x86-be">Known problems with the X86 back-end</a>
534</div>
535
536<div class="doc_text">
537
538<ul>
Chris Lattnerc5b7b242004-02-08 22:23:33 +0000[diff] [blame]539<li>None so far.
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]540</ul>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]541
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]542</div>
543
544<!-- ======================================================================= -->
545<div class="doc_subsection">
546 <a name="sparc-be">Known problems with the Sparc back-end</a>
547</div>
548
549<div class="doc_text">
550
551<ul>
Chris Lattner9e0b81c2004-03-19 19:22:28 +0000[diff] [blame]552<li>There are several programs in the LLVM testsuite that the Sparc code generator is known to miscompile.</li>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]553</ul>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]554
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]555</div>
556
557<!-- ======================================================================= -->
558<div class="doc_subsection">
559 <a name="c-be">Known problems with the C back-end</a>
560</div>
561
562<div class="doc_text">
563
564<ul>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]565
566<li>The C back-end produces code that violates the ANSI C Type-Based Alias
567Analysis rules. As such, special options may be necessary to compile the code
568(for example, GCC requires the <tt>-fno-strict-aliasing</tt> option). This
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]569problem probably cannot be fixed.</li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]570
Chris Lattnera623e482003-10-20 19:05:03 +0000[diff] [blame]571<li><a href="http://llvm.cs.uiuc.edu/PR33">Initializers for global variables</a>
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]572cannot include special floating point numbers like Not-A-Number or
573Infinity.</li>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]574
Chris Lattnerc679fbb2003-11-04 20:06:53 +0000[diff] [blame]575<li><a href="http://llvm.cs.uiuc.edu/PR56">Zero arg vararg functions are not
Chris Lattnerb28c3282003-10-24 04:03:19 +0000[diff] [blame]576supported</a>. This should not affect LLVM produced by the C or C++
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]577frontends.</li>
Chris Lattnerb28c3282003-10-24 04:03:19 +0000[diff] [blame]578
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]579</ul>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]580
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]581</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]582
583<!-- *********************************************************************** -->
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]584<div class="doc_section">
585 <a name="additionalinfo">Additional Information</a>
586</div>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]587<!-- *********************************************************************** -->
588
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]589<div class="doc_text">
590
591<p>A wide variety of additional information is available on the LLVM web page,
John Criswell86a3a482003-12-18 16:43:17 +0000[diff] [blame]592including mailing lists and publications describing algorithms and components
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]593implemented in LLVM. The web page also contains versions of the API
594documentation which is up-to-date with the CVS version of the source code. You
595can access versions of these documents specific to this release by going into
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]596the "<tt>llvm/doc/</tt>" directory in the LLVM tree.</p>
Chris Lattner3d482502003-10-02 04:57:28 +0000[diff] [blame]597
Misha Brukman80731b92003-11-22 00:38:41 +0000[diff] [blame]598<p>If you have any questions or comments about LLVM, please feel free to contact
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