Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +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> |
Reid Spencer | 6454ed3 | 2004-11-18 18:38:58 +0000 | [diff] [blame] | 5 | <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 6 | <link rel="stylesheet" href="llvm.css" type="text/css"> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 7 | <title>LLVM 2.7 Release Notes</title> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 8 | </head> |
| 9 | <body> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 10 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 11 | <div class="doc_title">LLVM 2.7 Release Notes</div> |
Mikhail Glushenkov | ea65d7d | 2008-10-13 02:08:34 +0000 | [diff] [blame] | 12 | |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 13 | <ol> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 14 | <li><a href="#intro">Introduction</a></li> |
Chris Lattner | 96a445e | 2008-10-13 18:01:01 +0000 | [diff] [blame] | 15 | <li><a href="#subproj">Sub-project Status Update</a></li> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 16 | <li><a href="#externalproj">External Projects Using LLVM 2.7</a></li> |
| 17 | <li><a href="#whatsnew">What's New in LLVM 2.7?</a></li> |
Chris Lattner | 4b538b9 | 2004-04-30 22:17:12 +0000 | [diff] [blame] | 18 | <li><a href="GettingStarted.html">Installation Instructions</a></li> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 19 | <li><a href="#portability">Portability and Supported Platforms</a></li> |
Dan Gohman | 44aa921 | 2008-10-14 16:23:02 +0000 | [diff] [blame] | 20 | <li><a href="#knownproblems">Known Problems</a></li> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 21 | <li><a href="#additionalinfo">Additional Information</a></li> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 22 | </ol> |
| 23 | |
Chris Lattner | 7911ce2 | 2004-05-23 21:07:27 +0000 | [diff] [blame] | 24 | <div class="doc_author"> |
Dan Gohman | 44aa921 | 2008-10-14 16:23:02 +0000 | [diff] [blame] | 25 | <p>Written by the <a href="http://llvm.org">LLVM Team</a></p> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 26 | </div> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 27 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 28 | <h1 style="color:red">These are in-progress notes for the upcoming LLVM 2.7 |
| 29 | release.<br> |
| 30 | You may prefer the |
| 31 | <a href="http://llvm.org/releases/2.6/docs/ReleaseNotes.html">LLVM 2.6 |
| 32 | Release Notes</a>.</h1> |
| 33 | |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 34 | <!-- *********************************************************************** --> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 35 | <div class="doc_section"> |
| 36 | <a name="intro">Introduction</a> |
| 37 | </div> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 38 | <!-- *********************************************************************** --> |
| 39 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 40 | <div class="doc_text"> |
| 41 | |
Chris Lattner | f6662f9 | 2008-10-13 17:57:36 +0000 | [diff] [blame] | 42 | <p>This document contains the release notes for the LLVM Compiler |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 43 | Infrastructure, release 2.7. Here we describe the status of LLVM, including |
Chris Lattner | f6662f9 | 2008-10-13 17:57:36 +0000 | [diff] [blame] | 44 | major improvements from the previous release and significant known problems. |
Mikhail Glushenkov | f795ef0 | 2009-03-01 18:09:47 +0000 | [diff] [blame] | 45 | All LLVM releases may be downloaded from the <a |
Chris Lattner | f6662f9 | 2008-10-13 17:57:36 +0000 | [diff] [blame] | 46 | href="http://llvm.org/releases/">LLVM releases web site</a>.</p> |
Chris Lattner | 1909261 | 2003-10-02 16:38:05 +0000 | [diff] [blame] | 47 | |
Chris Lattner | 7506b1d | 2004-12-07 08:04:13 +0000 | [diff] [blame] | 48 | <p>For more information about LLVM, including information about the latest |
Chris Lattner | c463b27 | 2005-10-29 07:07:09 +0000 | [diff] [blame] | 49 | release, please check out the <a href="http://llvm.org/">main LLVM |
Chris Lattner | 47ad72c | 2003-10-07 21:38:31 +0000 | [diff] [blame] | 50 | web site</a>. If you have questions or comments, the <a |
Chris Lattner | f6662f9 | 2008-10-13 17:57:36 +0000 | [diff] [blame] | 51 | href="http://mail.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVM Developer's Mailing |
| 52 | List</a> is a good place to send them.</p> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 53 | |
Mikhail Glushenkov | ea65d7d | 2008-10-13 02:08:34 +0000 | [diff] [blame] | 54 | <p>Note that if you are reading this file from a Subversion checkout or the |
Chris Lattner | 8497764 | 2007-09-21 03:54:09 +0000 | [diff] [blame] | 55 | main LLVM web page, this document applies to the <i>next</i> release, not the |
Gabor Greif | fa933f8 | 2008-10-14 11:00:32 +0000 | [diff] [blame] | 56 | current one. To see the release notes for a specific release, please see the |
Chris Lattner | 8497764 | 2007-09-21 03:54:09 +0000 | [diff] [blame] | 57 | <a href="http://llvm.org/releases/">releases page</a>.</p> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 58 | |
| 59 | </div> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 60 | |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 61 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 62 | <!-- |
| 63 | Almost dead code. |
| 64 | include/llvm/Analysis/LiveValues.h => Dan |
| 65 | lib/Transforms/IPO/MergeFunctions.cpp => consider for 2.8. |
| 66 | llvm/Analysis/PointerTracking.h => Edwin wants this, consider for 2.8. |
Chris Lattner | 76ef298 | 2010-01-09 22:30:40 +0000 | [diff] [blame] | 67 | ABCD, SCCVN, GEPSplitterPass |
Chris Lattner | 048fe3c | 2010-01-16 21:25:13 +0000 | [diff] [blame] | 68 | MSIL backend? |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 69 | --> |
| 70 | |
| 71 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 72 | <!-- Features that need text if they're finished for 2.7: |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 73 | gcc plugin. |
| 74 | strong phi elim |
| 75 | variable debug info for optimized code |
Chris Lattner | ab68e9e | 2009-02-26 22:33:38 +0000 | [diff] [blame] | 76 | postalloc scheduler: anti dependence breaking, hazard recognizer? |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 77 | metadata |
| 78 | loop dependence analysis |
| 79 | ELF Writer? How stable? |
| 80 | <li>PostRA scheduler improvements, ARM adoption (David Goodwin).</li> |
| 81 | 2.7 supports the GDB 7.0 jit interfaces for debug info. |
| 82 | 2.7 eliminates ADT/iterator.h |
Chris Lattner | acce85d | 2008-02-10 07:46:44 +0000 | [diff] [blame] | 83 | --> |
Mikhail Glushenkov | ea65d7d | 2008-10-13 02:08:34 +0000 | [diff] [blame] | 84 | |
Chris Lattner | 547a391 | 2008-10-12 19:47:48 +0000 | [diff] [blame] | 85 | <!-- for announcement email: |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 86 | Logo web page. |
| 87 | llvm devmtg |
| 88 | compiler_rt |
| 89 | KLEE web page at klee.llvm.org |
| 90 | Many new papers added to /pubs/ |
| 91 | Mention gcc plugin. |
| 92 | |
Chris Lattner | 74c80df | 2009-02-25 06:34:50 +0000 | [diff] [blame] | 93 | --> |
Chris Lattner | acce85d | 2008-02-10 07:46:44 +0000 | [diff] [blame] | 94 | |
Chris Lattner | 96a445e | 2008-10-13 18:01:01 +0000 | [diff] [blame] | 95 | <!-- *********************************************************************** --> |
| 96 | <div class="doc_section"> |
| 97 | <a name="subproj">Sub-project Status Update</a> |
Chris Lattner | ea34f64 | 2008-06-08 21:34:41 +0000 | [diff] [blame] | 98 | </div> |
Chris Lattner | 96a445e | 2008-10-13 18:01:01 +0000 | [diff] [blame] | 99 | <!-- *********************************************************************** --> |
Chris Lattner | ea34f64 | 2008-06-08 21:34:41 +0000 | [diff] [blame] | 100 | |
| 101 | <div class="doc_text"> |
Chris Lattner | 8348b47 | 2008-06-08 21:58:17 +0000 | [diff] [blame] | 102 | <p> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 103 | The LLVM 2.7 distribution currently consists of code from the core LLVM |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 104 | repository (which roughly includes the LLVM optimizers, code generators |
| 105 | and supporting tools), the Clang repository and the llvm-gcc repository. In |
| 106 | addition to this code, the LLVM Project includes other sub-projects that are in |
| 107 | development. Here we include updates on these subprojects. |
Bill Wendling | 63d8c55 | 2009-03-02 04:28:57 +0000 | [diff] [blame] | 108 | </p> |
Chris Lattner | 96a445e | 2008-10-13 18:01:01 +0000 | [diff] [blame] | 109 | |
Chris Lattner | 8348b47 | 2008-06-08 21:58:17 +0000 | [diff] [blame] | 110 | </div> |
| 111 | |
Chris Lattner | 96a445e | 2008-10-13 18:01:01 +0000 | [diff] [blame] | 112 | |
Chris Lattner | 8348b47 | 2008-06-08 21:58:17 +0000 | [diff] [blame] | 113 | <!--=========================================================================--> |
Chris Lattner | 96a445e | 2008-10-13 18:01:01 +0000 | [diff] [blame] | 114 | <div class="doc_subsection"> |
Chris Lattner | fb97b2d | 2008-10-13 18:11:54 +0000 | [diff] [blame] | 115 | <a name="clang">Clang: C/C++/Objective-C Frontend Toolkit</a> |
Chris Lattner | 8348b47 | 2008-06-08 21:58:17 +0000 | [diff] [blame] | 116 | </div> |
| 117 | |
| 118 | <div class="doc_text"> |
| 119 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 120 | <p>The <a href="http://clang.llvm.org/">Clang project</a> is ...</p> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 121 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 122 | <p>In the LLVM 2.7 time-frame, the Clang team has made many improvements:</p> |
Bill Wendling | 741748a | 2008-10-27 09:27:33 +0000 | [diff] [blame] | 123 | |
Daniel Dunbar | 1373943 | 2008-10-14 23:25:09 +0000 | [diff] [blame] | 124 | <ul> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 125 | <li>...</li> |
Bill Wendling | 6bc1528 | 2009-03-02 04:28:18 +0000 | [diff] [blame] | 126 | </ul> |
Chris Lattner | fb97b2d | 2008-10-13 18:11:54 +0000 | [diff] [blame] | 127 | </div> |
| 128 | |
| 129 | <!--=========================================================================--> |
| 130 | <div class="doc_subsection"> |
| 131 | <a name="clangsa">Clang Static Analyzer</a> |
| 132 | </div> |
| 133 | |
| 134 | <div class="doc_text"> |
| 135 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 136 | <p>Previously announced in the 2.4, 2.5, and 2.6 LLVM releases, the Clang project also |
Ted Kremenek | 8b3894c | 2009-02-27 07:01:32 +0000 | [diff] [blame] | 137 | includes an early stage static source code analysis tool for <a |
| 138 | href="http://clang.llvm.org/StaticAnalysis.html">automatically finding bugs</a> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 139 | in C and Objective-C programs. The tool performs checks to find |
Ted Kremenek | 8b3894c | 2009-02-27 07:01:32 +0000 | [diff] [blame] | 140 | bugs that occur on a specific path within a program.</p> |
Chris Lattner | cc04261 | 2008-10-14 00:52:49 +0000 | [diff] [blame] | 141 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 142 | <p>In the LLVM 2.7 time-frame, the analyzer core has ...</p> |
Chris Lattner | 8348b47 | 2008-06-08 21:58:17 +0000 | [diff] [blame] | 143 | |
| 144 | </div> |
| 145 | |
Chris Lattner | 96a445e | 2008-10-13 18:01:01 +0000 | [diff] [blame] | 146 | <!--=========================================================================--> |
| 147 | <div class="doc_subsection"> |
Nicolas Geoffray | 99a4d30 | 2008-10-14 19:23:04 +0000 | [diff] [blame] | 148 | <a name="vmkit">VMKit: JVM/CLI Virtual Machine Implementation</a> |
Chris Lattner | 96a445e | 2008-10-13 18:01:01 +0000 | [diff] [blame] | 149 | </div> |
| 150 | |
| 151 | <div class="doc_text"> |
| 152 | <p> |
Nicolas Geoffray | 99a4d30 | 2008-10-14 19:23:04 +0000 | [diff] [blame] | 153 | The <a href="http://vmkit.llvm.org/">VMKit project</a> is an implementation of |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 154 | a JVM and a CLI Virtual Machine (Microsoft .NET is an |
| 155 | implementation of the CLI) using LLVM for static and just-in-time |
| 156 | compilation.</p> |
Chris Lattner | 96a445e | 2008-10-13 18:01:01 +0000 | [diff] [blame] | 157 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 158 | <p> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 159 | VMKit version ?? builds with LLVM 2.7 and you can find it on its |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 160 | <a href="http://vmkit.llvm.org/releases/">web page</a>. The release includes |
Nicolas Geoffray | 56d313d | 2008-10-15 20:25:04 +0000 | [diff] [blame] | 161 | bug fixes, cleanup and new features. The major changes are:</p> |
Chris Lattner | 96a445e | 2008-10-13 18:01:01 +0000 | [diff] [blame] | 162 | |
Nicolas Geoffray | 99a4d30 | 2008-10-14 19:23:04 +0000 | [diff] [blame] | 163 | <ul> |
| 164 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 165 | <li>...</li> |
Nicolas Geoffray | 99a4d30 | 2008-10-14 19:23:04 +0000 | [diff] [blame] | 166 | |
| 167 | </ul> |
Chris Lattner | 96a445e | 2008-10-13 18:01:01 +0000 | [diff] [blame] | 168 | </div> |
| 169 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 170 | |
| 171 | <!--=========================================================================--> |
| 172 | <div class="doc_subsection"> |
| 173 | <a name="compiler-rt">compiler-rt: Compiler Runtime Library</a> |
| 174 | </div> |
| 175 | |
| 176 | <div class="doc_text"> |
| 177 | <p> |
| 178 | The new LLVM <a href="http://compiler-rt.llvm.org/">compiler-rt project</a> |
| 179 | is a simple library that provides an implementation of the low-level |
| 180 | target-specific hooks required by code generation and other runtime components. |
| 181 | For example, when compiling for a 32-bit target, converting a double to a 64-bit |
| 182 | unsigned integer is compiled into a runtime call to the "__fixunsdfdi" |
| 183 | function. The compiler-rt library provides highly optimized implementations of |
| 184 | this and other low-level routines (some are 3x faster than the equivalent |
| 185 | libgcc routines).</p> |
| 186 | |
| 187 | <p> |
| 188 | All of the code in the compiler-rt project is available under the standard LLVM |
| 189 | License, a "BSD-style" license.</p> |
| 190 | |
| 191 | </div> |
| 192 | |
| 193 | <!--=========================================================================--> |
| 194 | <div class="doc_subsection"> |
| 195 | <a name="klee">KLEE: Symbolic Execution and Automatic Test Case Generator</a> |
| 196 | </div> |
| 197 | |
| 198 | <div class="doc_text"> |
| 199 | <p> |
| 200 | The new LLVM <a href="http://klee.llvm.org/">KLEE project</a> is a symbolic |
| 201 | execution framework for programs in LLVM bitcode form. KLEE tries to |
| 202 | symbolically evaluate "all" paths through the application and records state |
| 203 | transitions that lead to fault states. This allows it to construct testcases |
| 204 | that lead to faults and can even be used to verify algorithms. For more |
| 205 | details, please see the <a |
| 206 | href="http://llvm.org/pubs/2008-12-OSDI-KLEE.html">OSDI 2008 paper</a> about |
| 207 | KLEE.</p> |
| 208 | |
| 209 | </div> |
| 210 | |
| 211 | <!--=========================================================================--> |
| 212 | <div class="doc_subsection"> |
| 213 | <a name="dragonegg">DragonEgg: GCC-4.5 as an LLVM frontend</a> |
| 214 | </div> |
| 215 | |
| 216 | <div class="doc_text"> |
| 217 | <p> |
| 218 | The goal of <a href="http://dragonegg.llvm.org/">DragonEgg</a> is to make |
| 219 | gcc-4.5 act like llvm-gcc without requiring any gcc modifications whatsoever. |
Duncan Sands | 78a1dcc | 2009-10-15 08:17:44 +0000 | [diff] [blame] | 220 | <a href="http://dragonegg.llvm.org/">DragonEgg</a> is a shared library (dragonegg.so) |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 221 | that is loaded by gcc at runtime. It ... |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 222 | </p> |
| 223 | |
| 224 | </div> |
| 225 | |
| 226 | |
| 227 | <!--=========================================================================--> |
| 228 | <div class="doc_subsection"> |
| 229 | <a name="mc">llvm-mc: Machine Code Toolkit</a> |
| 230 | </div> |
| 231 | |
| 232 | <div class="doc_text"> |
| 233 | <p> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 234 | The LLVM Machine Code (MC) Toolkit project is ... |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 235 | </p> |
| 236 | |
| 237 | </div> |
| 238 | |
| 239 | |
Chris Lattner | ab68e9e | 2009-02-26 22:33:38 +0000 | [diff] [blame] | 240 | <!-- *********************************************************************** --> |
| 241 | <div class="doc_section"> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 242 | <a name="externalproj">External Open Source Projects Using LLVM 2.7</a> |
Chris Lattner | ab68e9e | 2009-02-26 22:33:38 +0000 | [diff] [blame] | 243 | </div> |
| 244 | <!-- *********************************************************************** --> |
| 245 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 246 | <div class="doc_text"> |
| 247 | |
| 248 | <p>An exciting aspect of LLVM is that it is used as an enabling technology for |
| 249 | a lot of other language and tools projects. This section lists some of the |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 250 | projects that have already been updated to work with LLVM 2.7.</p> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 251 | </div> |
| 252 | |
| 253 | |
| 254 | <!--=========================================================================--> |
| 255 | <div class="doc_subsection"> |
| 256 | <a name="Rubinius">Rubinius</a> |
| 257 | </div> |
| 258 | |
| 259 | <div class="doc_text"> |
| 260 | <p><a href="http://github.com/evanphx/rubinius">Rubinius</a> is an environment |
| 261 | for running Ruby code which strives to write as much of the core class |
| 262 | implementation in Ruby as possible. Combined with a bytecode interpreting VM, it |
| 263 | uses LLVM to optimize and compile ruby code down to machine code. Techniques |
| 264 | such as type feedback, method inlining, and uncommon traps are all used to |
| 265 | remove dynamism from ruby execution and increase performance.</p> |
| 266 | |
| 267 | <p>Since LLVM 2.5, Rubinius has made several major leaps forward, implementing |
| 268 | a counter based JIT, type feedback and speculative method inlining. |
| 269 | </p> |
| 270 | |
| 271 | </div> |
| 272 | |
| 273 | <!--=========================================================================--> |
| 274 | <div class="doc_subsection"> |
| 275 | <a name="macruby">MacRuby</a> |
| 276 | </div> |
| 277 | |
| 278 | <div class="doc_text"> |
| 279 | |
| 280 | <p> |
| 281 | <a href="http://macruby.org">MacRuby</a> is an implementation of Ruby on top of |
| 282 | core Mac OS X technologies, such as the Objective-C common runtime and garbage |
| 283 | collector and the CoreFoundation framework. It is principally developed by |
| 284 | Apple and aims at enabling the creation of full-fledged Mac OS X applications. |
| 285 | </p> |
| 286 | |
| 287 | <p> |
| 288 | MacRuby uses LLVM for optimization passes, JIT and AOT compilation of Ruby |
| 289 | expressions. It also uses zero-cost DWARF exceptions to implement Ruby exception |
| 290 | handling.</p> |
| 291 | |
| 292 | </div> |
| 293 | |
| 294 | |
Chris Lattner | ab68e9e | 2009-02-26 22:33:38 +0000 | [diff] [blame] | 295 | <!--=========================================================================--> |
| 296 | <div class="doc_subsection"> |
| 297 | <a name="pure">Pure</a> |
| 298 | </div> |
| 299 | |
| 300 | <div class="doc_text"> |
| 301 | <p> |
Chris Lattner | 917cc71 | 2009-03-02 02:37:32 +0000 | [diff] [blame] | 302 | <a href="http://pure-lang.googlecode.com/">Pure</a> |
| 303 | is an algebraic/functional programming language based on term rewriting. |
Chris Lattner | ab68e9e | 2009-02-26 22:33:38 +0000 | [diff] [blame] | 304 | Programs are collections of equations which are used to evaluate expressions in |
| 305 | a symbolic fashion. Pure offers dynamic typing, eager and lazy evaluation, |
Mikhail Glushenkov | f795ef0 | 2009-03-01 18:09:47 +0000 | [diff] [blame] | 306 | lexical closures, a hygienic macro system (also based on term rewriting), |
Chris Lattner | ab68e9e | 2009-02-26 22:33:38 +0000 | [diff] [blame] | 307 | built-in list and matrix support (including list and matrix comprehensions) and |
| 308 | an easy-to-use C interface. The interpreter uses LLVM as a backend to |
| 309 | JIT-compile Pure programs to fast native code.</p> |
| 310 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 311 | <p>Pure versions ??? and later have been tested and are known to work with |
| 312 | LLVM 2.7 (and continue to work with older LLVM releases >= 2.3 as well). |
Chris Lattner | ab68e9e | 2009-02-26 22:33:38 +0000 | [diff] [blame] | 313 | </p> |
| 314 | </div> |
| 315 | |
| 316 | |
| 317 | <!--=========================================================================--> |
| 318 | <div class="doc_subsection"> |
| 319 | <a name="ldc">LLVM D Compiler</a> |
| 320 | </div> |
| 321 | |
| 322 | <div class="doc_text"> |
| 323 | <p> |
Chris Lattner | 917cc71 | 2009-03-02 02:37:32 +0000 | [diff] [blame] | 324 | <a href="http://www.dsource.org/projects/ldc">LDC</a> is an implementation of |
| 325 | the D Programming Language using the LLVM optimizer and code generator. |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 326 | The LDC project works great with the LLVM 2.6 release. General improvements in |
John Criswell | 524a5dd | 2009-03-02 15:28:15 +0000 | [diff] [blame] | 327 | this |
Chris Lattner | 917cc71 | 2009-03-02 02:37:32 +0000 | [diff] [blame] | 328 | cycle have included new inline asm constraint handling, better debug info |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 329 | support, general bug fixes and better x86-64 support. This has allowed |
| 330 | some major improvements in LDC, getting it much closer to being as |
Chris Lattner | ab68e9e | 2009-02-26 22:33:38 +0000 | [diff] [blame] | 331 | fully featured as the original DMD compiler from DigitalMars. |
| 332 | </p> |
| 333 | </div> |
| 334 | |
Chris Lattner | bc31caf | 2009-02-28 18:58:01 +0000 | [diff] [blame] | 335 | <!--=========================================================================--> |
| 336 | <div class="doc_subsection"> |
| 337 | <a name="RoadsendPHP">Roadsend PHP</a> |
| 338 | </div> |
| 339 | |
| 340 | <div class="doc_text"> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 341 | <p> |
| 342 | <a href="http://code.roadsend.com/rphp">Roadsend PHP</a> (rphp) is an open |
Chris Lattner | cade822 | 2009-03-02 19:07:24 +0000 | [diff] [blame] | 343 | source implementation of the PHP programming |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 344 | language that uses LLVM for its optimizer, JIT and static compiler. This is a |
Chris Lattner | cade822 | 2009-03-02 19:07:24 +0000 | [diff] [blame] | 345 | reimplementation of an earlier project that is now based on LLVM.</p> |
Chris Lattner | bc31caf | 2009-02-28 18:58:01 +0000 | [diff] [blame] | 346 | </div> |
Chris Lattner | ab68e9e | 2009-02-26 22:33:38 +0000 | [diff] [blame] | 347 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 348 | <!--=========================================================================--> |
| 349 | <div class="doc_subsection"> |
| 350 | <a name="UnladenSwallow">Unladen Swallow</a> |
| 351 | </div> |
| 352 | |
| 353 | <div class="doc_text"> |
| 354 | <p> |
| 355 | <a href="http://code.google.com/p/unladen-swallow/">Unladen Swallow</a> is a |
| 356 | branch of <a href="http://python.org/">Python</a> intended to be fully |
| 357 | compatible and significantly faster. It uses LLVM's optimization passes and JIT |
| 358 | compiler.</p> |
| 359 | </div> |
| 360 | |
| 361 | <!--=========================================================================--> |
| 362 | <div class="doc_subsection"> |
| 363 | <a name="llvm-lua">llvm-lua</a> |
| 364 | </div> |
| 365 | |
| 366 | <div class="doc_text"> |
| 367 | <p> |
| 368 | <a href="http://code.google.com/p/llvm-lua/">LLVM-Lua</a> uses LLVM to add JIT |
| 369 | and static compiling support to the Lua VM. Lua bytecode is analyzed to |
| 370 | remove type checks, then LLVM is used to compile the bytecode down to machine |
| 371 | code.</p> |
| 372 | </div> |
| 373 | |
| 374 | <!--=========================================================================--> |
| 375 | <div class="doc_subsection"> |
| 376 | <a name="icedtea">IcedTea Java Virtual Machine Implementation</a> |
| 377 | </div> |
| 378 | |
| 379 | <div class="doc_text"> |
| 380 | <p> |
| 381 | <a href="http://icedtea.classpath.org/wiki/Main_Page">IcedTea</a> provides a |
| 382 | harness to build OpenJDK using only free software build tools and to provide |
| 383 | replacements for the not-yet free parts of OpenJDK. One of the extensions that |
| 384 | IcedTea provides is a new JIT compiler named <a |
| 385 | href="http://icedtea.classpath.org/wiki/ZeroSharkFaq">Shark</a> which uses LLVM |
| 386 | to provide native code generation without introducing processor-dependent |
| 387 | code. |
| 388 | </p> |
| 389 | </div> |
| 390 | |
| 391 | |
Chris Lattner | 8348b47 | 2008-06-08 21:58:17 +0000 | [diff] [blame] | 392 | |
| 393 | <!-- *********************************************************************** --> |
| 394 | <div class="doc_section"> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 395 | <a name="whatsnew">What's New in LLVM 2.7?</a> |
Chris Lattner | 8348b47 | 2008-06-08 21:58:17 +0000 | [diff] [blame] | 396 | </div> |
| 397 | <!-- *********************************************************************** --> |
| 398 | |
Chris Lattner | f8e0b4e | 2008-06-08 22:59:35 +0000 | [diff] [blame] | 399 | <div class="doc_text"> |
| 400 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 401 | <p>This release includes a huge number of bug fixes, performance tweaks and |
Chris Lattner | f6662f9 | 2008-10-13 17:57:36 +0000 | [diff] [blame] | 402 | minor improvements. Some of the major improvements and new features are listed |
| 403 | in this section. |
Chris Lattner | f8e0b4e | 2008-06-08 22:59:35 +0000 | [diff] [blame] | 404 | </p> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 405 | |
Chris Lattner | f8e0b4e | 2008-06-08 22:59:35 +0000 | [diff] [blame] | 406 | </div> |
| 407 | |
Chris Lattner | 8348b47 | 2008-06-08 21:58:17 +0000 | [diff] [blame] | 408 | <!--=========================================================================--> |
Chris Lattner | ea34f64 | 2008-06-08 21:34:41 +0000 | [diff] [blame] | 409 | <div class="doc_subsection"> |
Chris Lattner | 252b83d | 2008-02-06 18:00:06 +0000 | [diff] [blame] | 410 | <a name="majorfeatures">Major New Features</a> |
| 411 | </div> |
| 412 | |
| 413 | <div class="doc_text"> |
| 414 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 415 | <p>LLVM 2.7 includes several major new capabilities:</p> |
Chris Lattner | f3e5bc6 | 2007-05-14 06:56:09 +0000 | [diff] [blame] | 416 | |
| 417 | <ul> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 418 | <li>...</li> |
Chris Lattner | 8170c10 | 2008-02-10 08:18:42 +0000 | [diff] [blame] | 419 | </ul> |
| 420 | |
Chris Lattner | f3e5bc6 | 2007-05-14 06:56:09 +0000 | [diff] [blame] | 421 | </div> |
| 422 | |
Chris Lattner | 8497764 | 2007-09-21 03:54:09 +0000 | [diff] [blame] | 423 | <!--=========================================================================--> |
| 424 | <div class="doc_subsection"> |
Chris Lattner | 917cc71 | 2009-03-02 02:37:32 +0000 | [diff] [blame] | 425 | <a name="coreimprovements">LLVM IR and Core Improvements</a> |
Chris Lattner | f304ffc | 2008-02-10 08:17:19 +0000 | [diff] [blame] | 426 | </div> |
| 427 | |
| 428 | <div class="doc_text"> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 429 | <p>LLVM IR has several new features for better support of new targets and that |
| 430 | expose new optimization opportunities:</p> |
Chris Lattner | f304ffc | 2008-02-10 08:17:19 +0000 | [diff] [blame] | 431 | |
Chris Lattner | 791f77b | 2008-06-05 06:25:56 +0000 | [diff] [blame] | 432 | <ul> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 433 | <li>...</li> |
Chris Lattner | f304ffc | 2008-02-10 08:17:19 +0000 | [diff] [blame] | 434 | </ul> |
Mikhail Glushenkov | ea65d7d | 2008-10-13 02:08:34 +0000 | [diff] [blame] | 435 | |
Chris Lattner | f304ffc | 2008-02-10 08:17:19 +0000 | [diff] [blame] | 436 | </div> |
| 437 | |
| 438 | <!--=========================================================================--> |
| 439 | <div class="doc_subsection"> |
Chris Lattner | acce85d | 2008-02-10 07:46:44 +0000 | [diff] [blame] | 440 | <a name="optimizer">Optimizer Improvements</a> |
| 441 | </div> |
| 442 | |
| 443 | <div class="doc_text"> |
| 444 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 445 | <p>In addition to a large array of minor performance tweaks and bug fixes, this |
Chris Lattner | f301387 | 2008-10-13 21:50:36 +0000 | [diff] [blame] | 446 | release includes a few major enhancements and additions to the optimizers:</p> |
Chris Lattner | acce85d | 2008-02-10 07:46:44 +0000 | [diff] [blame] | 447 | |
| 448 | <ul> |
| 449 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 450 | <li>...</li> |
Chris Lattner | 917cc71 | 2009-03-02 02:37:32 +0000 | [diff] [blame] | 451 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 452 | </ul> |
Chris Lattner | 917cc71 | 2009-03-02 02:37:32 +0000 | [diff] [blame] | 453 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 454 | </div> |
Chris Lattner | 917cc71 | 2009-03-02 02:37:32 +0000 | [diff] [blame] | 455 | |
Chris Lattner | 917cc71 | 2009-03-02 02:37:32 +0000 | [diff] [blame] | 456 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 457 | <!--=========================================================================--> |
| 458 | <div class="doc_subsection"> |
| 459 | <a name="executionengine">Interpreter and JIT Improvements</a> |
| 460 | </div> |
Chris Lattner | f301387 | 2008-10-13 21:50:36 +0000 | [diff] [blame] | 461 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 462 | <div class="doc_text"> |
| 463 | |
| 464 | <ul> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 465 | <li>...</li> |
Chris Lattner | 0b83220 | 2008-06-08 02:45:07 +0000 | [diff] [blame] | 466 | </ul> |
| 467 | |
| 468 | </div> |
| 469 | |
| 470 | <!--=========================================================================--> |
| 471 | <div class="doc_subsection"> |
Chris Lattner | 511433e | 2009-03-02 03:24:11 +0000 | [diff] [blame] | 472 | <a name="codegen">Target Independent Code Generator Improvements</a> |
Chris Lattner | 0b83220 | 2008-06-08 02:45:07 +0000 | [diff] [blame] | 473 | </div> |
| 474 | |
| 475 | <div class="doc_text"> |
| 476 | |
Mikhail Glushenkov | f795ef0 | 2009-03-01 18:09:47 +0000 | [diff] [blame] | 477 | <p>We have put a significant amount of work into the code generator |
| 478 | infrastructure, which allows us to implement more aggressive algorithms and make |
| 479 | it run faster:</p> |
Chris Lattner | 0b83220 | 2008-06-08 02:45:07 +0000 | [diff] [blame] | 480 | |
| 481 | <ul> |
Chris Lattner | 511433e | 2009-03-02 03:24:11 +0000 | [diff] [blame] | 482 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 483 | <li>...</li> |
Chris Lattner | 8497764 | 2007-09-21 03:54:09 +0000 | [diff] [blame] | 484 | </ul> |
Chris Lattner | 8497764 | 2007-09-21 03:54:09 +0000 | [diff] [blame] | 485 | </div> |
| 486 | |
Chris Lattner | 917cc71 | 2009-03-02 02:37:32 +0000 | [diff] [blame] | 487 | <!--=========================================================================--> |
| 488 | <div class="doc_subsection"> |
| 489 | <a name="x86">X86-32 and X86-64 Target Improvements</a> |
| 490 | </div> |
| 491 | |
| 492 | <div class="doc_text"> |
| 493 | <p>New features of the X86 target include: |
| 494 | </p> |
| 495 | |
| 496 | <ul> |
Chris Lattner | 511433e | 2009-03-02 03:24:11 +0000 | [diff] [blame] | 497 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 498 | <li>...</li> |
Chris Lattner | 511433e | 2009-03-02 03:24:11 +0000 | [diff] [blame] | 499 | |
Chris Lattner | 917cc71 | 2009-03-02 02:37:32 +0000 | [diff] [blame] | 500 | </ul> |
| 501 | |
Chris Lattner | 917cc71 | 2009-03-02 02:37:32 +0000 | [diff] [blame] | 502 | </div> |
Chris Lattner | 8497764 | 2007-09-21 03:54:09 +0000 | [diff] [blame] | 503 | |
| 504 | <!--=========================================================================--> |
| 505 | <div class="doc_subsection"> |
Chris Lattner | 1139899 | 2009-02-26 07:32:11 +0000 | [diff] [blame] | 506 | <a name="pic16">PIC16 Target Improvements</a> |
| 507 | </div> |
| 508 | |
| 509 | <div class="doc_text"> |
| 510 | <p>New features of the PIC16 target include: |
| 511 | </p> |
| 512 | |
| 513 | <ul> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 514 | <li>...</li> |
Chris Lattner | 1139899 | 2009-02-26 07:32:11 +0000 | [diff] [blame] | 515 | </ul> |
| 516 | |
| 517 | <p>Things not yet supported:</p> |
| 518 | |
| 519 | <ul> |
Chris Lattner | 1139899 | 2009-02-26 07:32:11 +0000 | [diff] [blame] | 520 | <li>Variable arguments.</li> |
Chris Lattner | 511433e | 2009-03-02 03:24:11 +0000 | [diff] [blame] | 521 | <li>Interrupts/programs.</li> |
Chris Lattner | 1139899 | 2009-02-26 07:32:11 +0000 | [diff] [blame] | 522 | </ul> |
| 523 | |
| 524 | </div> |
| 525 | |
Chris Lattner | 1139899 | 2009-02-26 07:32:11 +0000 | [diff] [blame] | 526 | <!--=========================================================================--> |
| 527 | <div class="doc_subsection"> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 528 | <a name="ARM">ARM Target Improvements</a> |
Chris Lattner | c441fb8 | 2009-03-01 02:30:21 +0000 | [diff] [blame] | 529 | </div> |
| 530 | |
| 531 | <div class="doc_text"> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 532 | <p>New features of the ARM target include: |
| 533 | </p> |
Chris Lattner | c441fb8 | 2009-03-01 02:30:21 +0000 | [diff] [blame] | 534 | |
| 535 | <ul> |
Chris Lattner | c441fb8 | 2009-03-01 02:30:21 +0000 | [diff] [blame] | 536 | |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 537 | <li>...</li> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 538 | </ul> |
Chris Lattner | c441fb8 | 2009-03-01 02:30:21 +0000 | [diff] [blame] | 539 | |
Chris Lattner | c441fb8 | 2009-03-01 02:30:21 +0000 | [diff] [blame] | 540 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 541 | </div> |
Chris Lattner | c441fb8 | 2009-03-01 02:30:21 +0000 | [diff] [blame] | 542 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 543 | <!--=========================================================================--> |
| 544 | <div class="doc_subsection"> |
| 545 | <a name="OtherTarget">Other Target Specific Improvements</a> |
| 546 | </div> |
Chris Lattner | c441fb8 | 2009-03-01 02:30:21 +0000 | [diff] [blame] | 547 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 548 | <div class="doc_text"> |
| 549 | <p>New features of other targets include: |
| 550 | </p> |
| 551 | |
| 552 | <ul> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 553 | <li>...</li> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 554 | </ul> |
| 555 | |
| 556 | </div> |
| 557 | |
| 558 | <!--=========================================================================--> |
| 559 | <div class="doc_subsection"> |
| 560 | <a name="newapis">New Useful APIs</a> |
| 561 | </div> |
| 562 | |
| 563 | <div class="doc_text"> |
| 564 | |
| 565 | <p>This release includes a number of new APIs that are used internally, which |
| 566 | may also be useful for external clients. |
| 567 | </p> |
| 568 | |
| 569 | <ul> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 570 | <li>...</li> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 571 | </ul> |
| 572 | |
| 573 | |
| 574 | </div> |
| 575 | |
| 576 | <!--=========================================================================--> |
| 577 | <div class="doc_subsection"> |
| 578 | <a name="otherimprovements">Other Improvements and New Features</a> |
| 579 | </div> |
| 580 | |
| 581 | <div class="doc_text"> |
| 582 | <p>Other miscellaneous features include:</p> |
| 583 | |
| 584 | <ul> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 585 | <li>...</li> |
Chris Lattner | c441fb8 | 2009-03-01 02:30:21 +0000 | [diff] [blame] | 586 | </ul> |
| 587 | |
| 588 | </div> |
| 589 | |
Chris Lattner | 77d29b1 | 2008-06-05 08:02:49 +0000 | [diff] [blame] | 590 | |
| 591 | <!--=========================================================================--> |
| 592 | <div class="doc_subsection"> |
Chris Lattner | f6662f9 | 2008-10-13 17:57:36 +0000 | [diff] [blame] | 593 | <a name="changes">Major Changes and Removed Features</a> |
| 594 | </div> |
| 595 | |
| 596 | <div class="doc_text"> |
| 597 | |
Chris Lattner | eeb4da0 | 2008-10-13 22:06:31 +0000 | [diff] [blame] | 598 | <p>If you're already an LLVM user or developer with out-of-tree changes based |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 599 | on LLVM 2.6, this section lists some "gotchas" that you may run into upgrading |
Chris Lattner | eeb4da0 | 2008-10-13 22:06:31 +0000 | [diff] [blame] | 600 | from the previous release.</p> |
Chris Lattner | f6662f9 | 2008-10-13 17:57:36 +0000 | [diff] [blame] | 601 | |
| 602 | <ul> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 603 | <li>...</li> |
Chris Lattner | eeb4da0 | 2008-10-13 22:06:31 +0000 | [diff] [blame] | 604 | </ul> |
| 605 | |
| 606 | |
| 607 | <p>In addition, many APIs have changed in this release. Some of the major LLVM |
| 608 | API changes are:</p> |
| 609 | |
| 610 | <ul> |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 611 | <li>...</li> |
Devang Patel | b34dd13 | 2008-10-14 20:03:43 +0000 | [diff] [blame] | 612 | </ul> |
Chris Lattner | f6662f9 | 2008-10-13 17:57:36 +0000 | [diff] [blame] | 613 | |
Chris Lattner | f6662f9 | 2008-10-13 17:57:36 +0000 | [diff] [blame] | 614 | </div> |
| 615 | |
| 616 | |
| 617 | |
Chris Lattner | 1909261 | 2003-10-02 16:38:05 +0000 | [diff] [blame] | 618 | <!-- *********************************************************************** --> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 619 | <div class="doc_section"> |
| 620 | <a name="portability">Portability and Supported Platforms</a> |
| 621 | </div> |
Chris Lattner | 1909261 | 2003-10-02 16:38:05 +0000 | [diff] [blame] | 622 | <!-- *********************************************************************** --> |
| 623 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 624 | <div class="doc_text"> |
| 625 | |
John Criswell | 0b5b5e9 | 2004-12-08 20:35:47 +0000 | [diff] [blame] | 626 | <p>LLVM is known to work on the following platforms:</p> |
Chris Lattner | 4654bdb | 2004-06-01 18:22:41 +0000 | [diff] [blame] | 627 | |
| 628 | <ul> |
Mikhail Glushenkov | f795ef0 | 2009-03-01 18:09:47 +0000 | [diff] [blame] | 629 | <li>Intel and AMD machines (IA32, X86-64, AMD64, EMT-64) running Red Hat |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 630 | Linux, Fedora Core, FreeBSD and AuroraUX (and probably other unix-like |
| 631 | systems).</li> |
Mikhail Glushenkov | f795ef0 | 2009-03-01 18:09:47 +0000 | [diff] [blame] | 632 | <li>PowerPC and X86-based Mac OS X systems, running 10.3 and above in 32-bit |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 633 | and 64-bit modes.</li> |
Chris Lattner | 252b83d | 2008-02-06 18:00:06 +0000 | [diff] [blame] | 634 | <li>Intel and AMD machines running on Win32 using MinGW libraries (native).</li> |
Chris Lattner | 57a460e | 2007-05-23 04:39:32 +0000 | [diff] [blame] | 635 | <li>Intel and AMD machines running on Win32 with the Cygwin libraries (limited |
| 636 | support is available for native builds with Visual C++).</li> |
Chris Lattner | 7e23d6e | 2009-10-16 16:30:58 +0000 | [diff] [blame] | 637 | <li>Sun x86 and AMD64 machines running Solaris 10, OpenSolaris 0906.</li> |
John Criswell | 9321fa8 | 2005-05-13 20:28:15 +0000 | [diff] [blame] | 638 | <li>Alpha-based machines running Debian GNU/Linux.</li> |
Chris Lattner | 4654bdb | 2004-06-01 18:22:41 +0000 | [diff] [blame] | 639 | </ul> |
| 640 | |
Chris Lattner | bc5786b | 2008-06-05 06:57:39 +0000 | [diff] [blame] | 641 | <p>The core LLVM infrastructure uses GNU autoconf to adapt itself |
Brian Gaeke | b0fd761 | 2004-05-09 05:28:35 +0000 | [diff] [blame] | 642 | to the machine and operating system on which it is built. However, minor |
| 643 | porting may be required to get LLVM to work on new platforms. We welcome your |
| 644 | portability patches and reports of successful builds or error messages.</p> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 645 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 646 | </div> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 647 | |
| 648 | <!-- *********************************************************************** --> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 649 | <div class="doc_section"> |
| 650 | <a name="knownproblems">Known Problems</a> |
| 651 | </div> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 652 | <!-- *********************************************************************** --> |
| 653 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 654 | <div class="doc_text"> |
| 655 | |
Mikhail Glushenkov | f795ef0 | 2009-03-01 18:09:47 +0000 | [diff] [blame] | 656 | <p>This section contains significant known problems with the LLVM system, |
Chris Lattner | e18b32e | 2008-11-10 05:40:34 +0000 | [diff] [blame] | 657 | listed by component. If you run into a problem, please check the <a |
Chris Lattner | c463b27 | 2005-10-29 07:07:09 +0000 | [diff] [blame] | 658 | href="http://llvm.org/bugs/">LLVM bug database</a> and submit a bug if |
Chris Lattner | 5eccca4 | 2003-12-12 21:22:16 +0000 | [diff] [blame] | 659 | there isn't already one.</p> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 660 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 661 | <ul> |
| 662 | <li>The llvm-gcc bootstrap will fail with some versions of binutils (e.g. 2.15) |
| 663 | with a message of "<tt><a href="http://llvm.org/PR5004">Error: can not do 8 |
| 664 | byte pc-relative relocation</a></tt>" when building C++ code. We intend to |
Jeffrey Yasskin | bec4877 | 2010-01-28 01:14:43 +0000 | [diff] [blame] | 665 | fix this on mainline, but a workaround is to upgrade to binutils 2.17 or |
| 666 | later.</li> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 667 | |
| 668 | <li>LLVM will not correctly compile on Solaris and/or OpenSolaris |
| 669 | using the stock GCC 3.x.x series 'out the box', |
Chris Lattner | 554ee4a | 2009-11-03 21:50:09 +0000 | [diff] [blame] | 670 | See: <a href="GettingStarted.html#brokengcc">Broken versions of GCC and other tools</a>. |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 671 | However, A <a href="http://pkg.auroraux.org/GCC">Modern GCC Build</a> |
| 672 | for x86/x86-64 has been made available from the third party AuroraUX Project |
| 673 | that has been meticulously tested for bootstrapping LLVM & Clang.</li> |
| 674 | </ul> |
| 675 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 676 | </div> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 677 | |
Chris Lattner | f5ee170 | 2004-03-14 02:03:02 +0000 | [diff] [blame] | 678 | <!-- ======================================================================= --> |
| 679 | <div class="doc_subsection"> |
| 680 | <a name="experimental">Experimental features included with this release</a> |
| 681 | </div> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 682 | |
Chris Lattner | f5ee170 | 2004-03-14 02:03:02 +0000 | [diff] [blame] | 683 | <div class="doc_text"> |
| 684 | |
Misha Brukman | 6df9e2c | 2004-05-12 21:46:05 +0000 | [diff] [blame] | 685 | <p>The following components of this LLVM release are either untested, known to |
| 686 | be broken or unreliable, or are in early development. These components should |
| 687 | not be relied on, and bugs should not be filed against them, but they may be |
| 688 | useful to some people. In particular, if you would like to work on one of these |
Chris Lattner | 2b659ef | 2008-02-12 06:29:45 +0000 | [diff] [blame] | 689 | components, please contact us on the <a |
| 690 | href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVMdev list</a>.</p> |
Chris Lattner | f5ee170 | 2004-03-14 02:03:02 +0000 | [diff] [blame] | 691 | |
| 692 | <ul> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 693 | <li>The MSIL, Alpha, SPU, MIPS, PIC16, Blackfin, MSP430 and SystemZ backends are |
| 694 | experimental.</li> |
Bill Wendling | 99dac47 | 2009-03-02 07:54:14 +0000 | [diff] [blame] | 695 | <li>The <tt>llc</tt> "<tt>-filetype=asm</tt>" (the default) is the only |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 696 | supported value for this option. The ELF writer is experimental.</li> |
| 697 | <li>The implementation of Andersen's Alias Analysis has many known bugs.</li> |
Chris Lattner | f5ee170 | 2004-03-14 02:03:02 +0000 | [diff] [blame] | 698 | </ul> |
| 699 | |
| 700 | </div> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 701 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 702 | <!-- ======================================================================= --> |
| 703 | <div class="doc_subsection"> |
Chris Lattner | 2629922 | 2006-11-18 07:51:14 +0000 | [diff] [blame] | 704 | <a name="x86-be">Known problems with the X86 back-end</a> |
John Criswell | c0c186d | 2005-11-08 21:11:33 +0000 | [diff] [blame] | 705 | </div> |
| 706 | |
| 707 | <div class="doc_text"> |
| 708 | |
| 709 | <ul> |
Anton Korobeynikov | a6094be | 2008-06-08 10:24:13 +0000 | [diff] [blame] | 710 | <li>The X86 backend does not yet support |
| 711 | all <a href="http://llvm.org/PR879">inline assembly that uses the X86 |
| 712 | floating point stack</a>. It supports the 'f' and 't' constraints, but not |
| 713 | 'u'.</li> |
Chris Lattner | e6e1b35 | 2008-06-08 21:19:07 +0000 | [diff] [blame] | 714 | <li>The X86 backend generates inefficient floating point code when configured |
| 715 | to generate code for systems that don't have SSE2.</li> |
Duncan Sands | 47eff2b | 2008-06-08 19:38:43 +0000 | [diff] [blame] | 716 | <li>Win64 code generation wasn't widely tested. Everything should work, but we |
John Criswell | 524a5dd | 2009-03-02 15:28:15 +0000 | [diff] [blame] | 717 | expect small issues to happen. Also, llvm-gcc cannot build the mingw64 |
| 718 | runtime currently due |
Anton Korobeynikov | a6094be | 2008-06-08 10:24:13 +0000 | [diff] [blame] | 719 | to <a href="http://llvm.org/PR2255">several</a> |
John Criswell | 524a5dd | 2009-03-02 15:28:15 +0000 | [diff] [blame] | 720 | <a href="http://llvm.org/PR2257">bugs</a> and due to lack of support for |
| 721 | the |
| 722 | 'u' inline assembly constraint and for X87 floating point inline assembly.</li> |
Dan Gohman | 8207ba9 | 2008-06-08 23:05:11 +0000 | [diff] [blame] | 723 | <li>The X86-64 backend does not yet support the LLVM IR instruction |
Chris Lattner | 917cc71 | 2009-03-02 02:37:32 +0000 | [diff] [blame] | 724 | <tt>va_arg</tt>. Currently, the llvm-gcc and front-ends support variadic |
Dan Gohman | 8207ba9 | 2008-06-08 23:05:11 +0000 | [diff] [blame] | 725 | argument constructs on X86-64 by lowering them manually.</li> |
Chris Lattner | 2629922 | 2006-11-18 07:51:14 +0000 | [diff] [blame] | 726 | </ul> |
| 727 | |
| 728 | </div> |
| 729 | |
| 730 | <!-- ======================================================================= --> |
| 731 | <div class="doc_subsection"> |
| 732 | <a name="ppc-be">Known problems with the PowerPC back-end</a> |
| 733 | </div> |
| 734 | |
| 735 | <div class="doc_text"> |
| 736 | |
| 737 | <ul> |
Nicolas Geoffray | e4285dc | 2007-05-15 09:21:28 +0000 | [diff] [blame] | 738 | <li>The Linux PPC32/ABI support needs testing for the interpreter and static |
Chris Lattner | 57a460e | 2007-05-23 04:39:32 +0000 | [diff] [blame] | 739 | compilation, and lacks support for debug information.</li> |
Chris Lattner | 2629922 | 2006-11-18 07:51:14 +0000 | [diff] [blame] | 740 | </ul> |
| 741 | |
| 742 | </div> |
| 743 | |
| 744 | <!-- ======================================================================= --> |
| 745 | <div class="doc_subsection"> |
Chris Lattner | f3e5bc6 | 2007-05-14 06:56:09 +0000 | [diff] [blame] | 746 | <a name="arm-be">Known problems with the ARM back-end</a> |
| 747 | </div> |
| 748 | |
| 749 | <div class="doc_text"> |
| 750 | |
| 751 | <ul> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 752 | <li>Support for the Advanced SIMD (Neon) instruction set is still incomplete |
| 753 | and not well tested. Some features may not work at all, and the code quality |
| 754 | may be poor in some cases.</li> |
Chris Lattner | 57a460e | 2007-05-23 04:39:32 +0000 | [diff] [blame] | 755 | <li>Thumb mode works only on ARMv6 or higher processors. On sub-ARMv6 |
Duncan Sands | c90d68b | 2007-09-26 15:59:54 +0000 | [diff] [blame] | 756 | processors, thumb programs can crash or produce wrong |
Chris Lattner | 57a460e | 2007-05-23 04:39:32 +0000 | [diff] [blame] | 757 | results (<a href="http://llvm.org/PR1388">PR1388</a>).</li> |
John Criswell | 524a5dd | 2009-03-02 15:28:15 +0000 | [diff] [blame] | 758 | <li>Compilation for ARM Linux OABI (old ABI) is supported but not fully tested. |
Chris Lattner | f3e5bc6 | 2007-05-14 06:56:09 +0000 | [diff] [blame] | 759 | </li> |
Chris Lattner | f3e5bc6 | 2007-05-14 06:56:09 +0000 | [diff] [blame] | 760 | </ul> |
| 761 | |
| 762 | </div> |
| 763 | |
| 764 | <!-- ======================================================================= --> |
| 765 | <div class="doc_subsection"> |
Chris Lattner | 2629922 | 2006-11-18 07:51:14 +0000 | [diff] [blame] | 766 | <a name="sparc-be">Known problems with the SPARC back-end</a> |
| 767 | </div> |
| 768 | |
| 769 | <div class="doc_text"> |
| 770 | |
| 771 | <ul> |
John Criswell | 524a5dd | 2009-03-02 15:28:15 +0000 | [diff] [blame] | 772 | <li>The SPARC backend only supports the 32-bit SPARC ABI (-m32); it does not |
Chris Lattner | 2629922 | 2006-11-18 07:51:14 +0000 | [diff] [blame] | 773 | support the 64-bit SPARC ABI (-m64).</li> |
| 774 | </ul> |
| 775 | |
| 776 | </div> |
| 777 | |
| 778 | <!-- ======================================================================= --> |
| 779 | <div class="doc_subsection"> |
Bruno Cardoso Lopes | b7e1a4f | 2008-10-25 14:56:26 +0000 | [diff] [blame] | 780 | <a name="mips-be">Known problems with the MIPS back-end</a> |
| 781 | </div> |
| 782 | |
| 783 | <div class="doc_text"> |
| 784 | |
| 785 | <ul> |
Bruno Cardoso Lopes | b7e1a4f | 2008-10-25 14:56:26 +0000 | [diff] [blame] | 786 | <li>64-bit MIPS targets are not supported yet.</li> |
| 787 | </ul> |
| 788 | |
| 789 | </div> |
| 790 | |
| 791 | <!-- ======================================================================= --> |
| 792 | <div class="doc_subsection"> |
Chris Lattner | 2629922 | 2006-11-18 07:51:14 +0000 | [diff] [blame] | 793 | <a name="alpha-be">Known problems with the Alpha back-end</a> |
| 794 | </div> |
| 795 | |
| 796 | <div class="doc_text"> |
| 797 | |
| 798 | <ul> |
| 799 | |
| 800 | <li>On 21164s, some rare FP arithmetic sequences which may trap do not have the |
| 801 | appropriate nops inserted to ensure restartability.</li> |
| 802 | |
John Criswell | c0c186d | 2005-11-08 21:11:33 +0000 | [diff] [blame] | 803 | </ul> |
| 804 | </div> |
| 805 | |
Chris Lattner | 2629922 | 2006-11-18 07:51:14 +0000 | [diff] [blame] | 806 | <!-- ======================================================================= --> |
| 807 | <div class="doc_subsection"> |
Chris Lattner | f3e5bc6 | 2007-05-14 06:56:09 +0000 | [diff] [blame] | 808 | <a name="c-be">Known problems with the C back-end</a> |
Chris Lattner | 2629922 | 2006-11-18 07:51:14 +0000 | [diff] [blame] | 809 | </div> |
| 810 | |
| 811 | <div class="doc_text"> |
| 812 | |
| 813 | <ul> |
Chris Lattner | 5733b27 | 2008-06-05 06:35:40 +0000 | [diff] [blame] | 814 | <li><a href="http://llvm.org/PR802">The C backend has only basic support for |
| 815 | inline assembly code</a>.</li> |
Chris Lattner | 725a0d8 | 2007-09-26 06:01:35 +0000 | [diff] [blame] | 816 | <li><a href="http://llvm.org/PR1658">The C backend violates the ABI of common |
| 817 | C++ programs</a>, preventing intermixing between C++ compiled by the CBE and |
Gabor Greif | 4906abe | 2009-03-02 12:02:51 +0000 | [diff] [blame] | 818 | C++ code compiled with <tt>llc</tt> or native compilers.</li> |
Duncan Sands | f74c0cc | 2008-02-10 13:40:55 +0000 | [diff] [blame] | 819 | <li>The C backend does not support all exception handling constructs.</li> |
Duncan Sands | 50723a9 | 2009-02-25 11:51:54 +0000 | [diff] [blame] | 820 | <li>The C backend does not support arbitrary precision integers.</li> |
Chris Lattner | 2629922 | 2006-11-18 07:51:14 +0000 | [diff] [blame] | 821 | </ul> |
| 822 | |
| 823 | </div> |
John Criswell | c0c186d | 2005-11-08 21:11:33 +0000 | [diff] [blame] | 824 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 825 | |
| 826 | <!-- ======================================================================= --> |
| 827 | <div class="doc_subsection"> |
Chris Lattner | 5733b27 | 2008-06-05 06:35:40 +0000 | [diff] [blame] | 828 | <a name="c-fe">Known problems with the llvm-gcc C front-end</a> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 829 | </div> |
Chris Lattner | 47588f9 | 2003-10-02 05:07:23 +0000 | [diff] [blame] | 830 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 831 | <div class="doc_text"> |
Chris Lattner | c5d658a | 2006-03-03 00:34:26 +0000 | [diff] [blame] | 832 | |
Chris Lattner | 5733b27 | 2008-06-05 06:35:40 +0000 | [diff] [blame] | 833 | <p>The only major language feature of GCC not supported by llvm-gcc is |
| 834 | the <tt>__builtin_apply</tt> family of builtins. However, some extensions |
| 835 | are only supported on some targets. For example, trampolines are only |
Duncan Sands | 27aff87 | 2008-06-08 20:18:35 +0000 | [diff] [blame] | 836 | supported on some targets (these are used when you take the address of a |
| 837 | nested function).</p> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 838 | |
Chris Lattner | 5733b27 | 2008-06-05 06:35:40 +0000 | [diff] [blame] | 839 | <p>If you run into GCC extensions which are not supported, please let us know. |
| 840 | </p> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 841 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 842 | </div> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 843 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 844 | <!-- ======================================================================= --> |
| 845 | <div class="doc_subsection"> |
Chris Lattner | 5733b27 | 2008-06-05 06:35:40 +0000 | [diff] [blame] | 846 | <a name="c++-fe">Known problems with the llvm-gcc C++ front-end</a> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 847 | </div> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 848 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 849 | <div class="doc_text"> |
| 850 | |
Chris Lattner | f3e5bc6 | 2007-05-14 06:56:09 +0000 | [diff] [blame] | 851 | <p>The C++ front-end is considered to be fully |
Chris Lattner | 7506b1d | 2004-12-07 08:04:13 +0000 | [diff] [blame] | 852 | tested and works for a number of non-trivial programs, including LLVM |
Chris Lattner | f3e5bc6 | 2007-05-14 06:56:09 +0000 | [diff] [blame] | 853 | itself, Qt, Mozilla, etc.</p> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 854 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 855 | <ul> |
Anton Korobeynikov | 0021fc1 | 2008-10-11 18:27:16 +0000 | [diff] [blame] | 856 | <li>Exception handling works well on the X86 and PowerPC targets. Currently |
Chris Lattner | e18b32e | 2008-11-10 05:40:34 +0000 | [diff] [blame] | 857 | only Linux and Darwin targets are supported (both 32 and 64 bit).</li> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 858 | </ul> |
Chris Lattner | fcc54b3 | 2003-10-07 22:14:37 +0000 | [diff] [blame] | 859 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 860 | </div> |
| 861 | |
Chris Lattner | 1eb4df6 | 2008-10-30 03:58:13 +0000 | [diff] [blame] | 862 | <!-- ======================================================================= --> |
| 863 | <div class="doc_subsection"> |
| 864 | <a name="fortran-fe">Known problems with the llvm-gcc Fortran front-end</a> |
| 865 | </div> |
| 866 | |
| 867 | <div class="doc_text"> |
Gabor Greif | ba10fe0 | 2008-11-04 21:50:59 +0000 | [diff] [blame] | 868 | <ul> |
Chris Lattner | 1eb4df6 | 2008-10-30 03:58:13 +0000 | [diff] [blame] | 869 | <li>Fortran support generally works, but there are still several unresolved bugs |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 870 | in <a href="http://llvm.org/bugs/">Bugzilla</a>. Please see the |
| 871 | tools/gfortran component for details.</li> |
Gabor Greif | ba10fe0 | 2008-11-04 21:50:59 +0000 | [diff] [blame] | 872 | </ul> |
Chris Lattner | 1eb4df6 | 2008-10-30 03:58:13 +0000 | [diff] [blame] | 873 | </div> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 874 | |
Chris Lattner | 2b659ef | 2008-02-12 06:29:45 +0000 | [diff] [blame] | 875 | <!-- ======================================================================= --> |
| 876 | <div class="doc_subsection"> |
Chris Lattner | 5733b27 | 2008-06-05 06:35:40 +0000 | [diff] [blame] | 877 | <a name="ada-fe">Known problems with the llvm-gcc Ada front-end</a> |
Chris Lattner | 2b659ef | 2008-02-12 06:29:45 +0000 | [diff] [blame] | 878 | </div> |
| 879 | |
| 880 | <div class="doc_text"> |
John Criswell | 524a5dd | 2009-03-02 15:28:15 +0000 | [diff] [blame] | 881 | The llvm-gcc 4.2 Ada compiler works fairly well; however, this is not a mature |
| 882 | technology, and problems should be expected. |
Chris Lattner | 2b659ef | 2008-02-12 06:29:45 +0000 | [diff] [blame] | 883 | <ul> |
Duncan Sands | 27aff87 | 2008-06-08 20:18:35 +0000 | [diff] [blame] | 884 | <li>The Ada front-end currently only builds on X86-32. This is mainly due |
John Criswell | 524a5dd | 2009-03-02 15:28:15 +0000 | [diff] [blame] | 885 | to lack of trampoline support (pointers to nested functions) on other platforms. |
| 886 | However, it <a href="http://llvm.org/PR2006">also fails to build on X86-64</a> |
Chris Lattner | 2b659ef | 2008-02-12 06:29:45 +0000 | [diff] [blame] | 887 | which does support trampolines.</li> |
| 888 | <li>The Ada front-end <a href="http://llvm.org/PR2007">fails to bootstrap</a>. |
Duncan Sands | 326a498 | 2009-02-25 11:59:06 +0000 | [diff] [blame] | 889 | This is due to lack of LLVM support for <tt>setjmp</tt>/<tt>longjmp</tt> style |
| 890 | exception handling, which is used internally by the compiler. |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 891 | Workaround: configure with <tt>--disable-bootstrap</tt>.</li> |
Duncan Sands | 978bcee | 2008-10-13 17:27:23 +0000 | [diff] [blame] | 892 | <li>The c380004, <a href="http://llvm.org/PR2010">c393010</a> |
| 893 | and <a href="http://llvm.org/PR2421">cxg2021</a> ACATS tests fail |
Duncan Sands | 326a498 | 2009-02-25 11:59:06 +0000 | [diff] [blame] | 894 | (c380004 also fails with gcc-4.2 mainline). |
| 895 | If the compiler is built with checks disabled then <a href="http://llvm.org/PR2010">c393010</a> |
| 896 | causes the compiler to go into an infinite loop, using up all system memory.</li> |
Duncan Sands | dd3e672 | 2009-03-02 16:35:57 +0000 | [diff] [blame] | 897 | <li>Some GCC specific Ada tests continue to crash the compiler.</li> |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 898 | <li>The <tt>-E</tt> binder option (exception backtraces) |
Chris Lattner | 2b659ef | 2008-02-12 06:29:45 +0000 | [diff] [blame] | 899 | <a href="http://llvm.org/PR1982">does not work</a> and will result in programs |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 900 | crashing if an exception is raised. Workaround: do not use <tt>-E</tt>.</li> |
Chris Lattner | 2b659ef | 2008-02-12 06:29:45 +0000 | [diff] [blame] | 901 | <li>Only discrete types <a href="http://llvm.org/PR1981">are allowed to start |
| 902 | or finish at a non-byte offset</a> in a record. Workaround: do not pack records |
| 903 | or use representation clauses that result in a field of a non-discrete type |
| 904 | starting or finishing in the middle of a byte.</li> |
Chris Lattner | e6e1b35 | 2008-06-08 21:19:07 +0000 | [diff] [blame] | 905 | <li>The <tt>lli</tt> interpreter <a href="http://llvm.org/PR2009">considers |
| 906 | 'main' as generated by the Ada binder to be invalid</a>. |
| 907 | Workaround: hand edit the file to use pointers for <tt>argv</tt> and |
| 908 | <tt>envp</tt> rather than integers.</li> |
| 909 | <li>The <tt>-fstack-check</tt> option <a href="http://llvm.org/PR2008">is |
| 910 | ignored</a>.</li> |
Chris Lattner | 2b659ef | 2008-02-12 06:29:45 +0000 | [diff] [blame] | 911 | </ul> |
| 912 | </div> |
| 913 | |
Chris Lattner | 61358ab | 2009-10-13 17:48:04 +0000 | [diff] [blame] | 914 | <!-- ======================================================================= --> |
| 915 | <div class="doc_subsection"> |
| 916 | <a name="ocaml-bindings">Known problems with the O'Caml bindings</a> |
| 917 | </div> |
| 918 | |
| 919 | <div class="doc_text"> |
| 920 | |
| 921 | <p>The <tt>Llvm.Linkage</tt> module is broken, and has incorrect values. Only |
| 922 | <tt>Llvm.Linkage.External</tt>, <tt>Llvm.Linkage.Available_externally</tt>, and |
| 923 | <tt>Llvm.Linkage.Link_once</tt> will be correct. If you need any of the other linkage |
| 924 | modes, you'll have to write an external C library in order to expose the |
| 925 | functionality. This has been fixed in the trunk.</p> |
| 926 | </div> |
| 927 | |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 928 | <!-- *********************************************************************** --> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 929 | <div class="doc_section"> |
| 930 | <a name="additionalinfo">Additional Information</a> |
| 931 | </div> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 932 | <!-- *********************************************************************** --> |
| 933 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 934 | <div class="doc_text"> |
| 935 | |
Chris Lattner | 416db10 | 2005-05-16 17:13:10 +0000 | [diff] [blame] | 936 | <p>A wide variety of additional information is available on the <a |
Chris Lattner | b4b0ce7 | 2007-05-18 00:44:29 +0000 | [diff] [blame] | 937 | href="http://llvm.org">LLVM web page</a>, in particular in the <a |
| 938 | href="http://llvm.org/docs/">documentation</a> section. The web page also |
Reid Spencer | 669ed45 | 2007-07-09 08:04:31 +0000 | [diff] [blame] | 939 | contains versions of the API documentation which is up-to-date with the |
| 940 | Subversion version of the source code. |
Misha Brukman | 109d9e8 | 2005-03-30 19:14:24 +0000 | [diff] [blame] | 941 | You can access versions of these documents specific to this release by going |
| 942 | into the "<tt>llvm/doc/</tt>" directory in the LLVM tree.</p> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 943 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 944 | <p>If you have any questions or comments about LLVM, please feel free to contact |
Chris Lattner | c463b27 | 2005-10-29 07:07:09 +0000 | [diff] [blame] | 945 | us via the <a href="http://llvm.org/docs/#maillist"> mailing |
Chris Lattner | 5eccca4 | 2003-12-12 21:22:16 +0000 | [diff] [blame] | 946 | lists</a>.</p> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 947 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 948 | </div> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 949 | |
| 950 | <!-- *********************************************************************** --> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 951 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 952 | <hr> |
Misha Brukman | 2061e89 | 2003-11-22 01:23:39 +0000 | [diff] [blame] | 953 | <address> |
Misha Brukman | 38847d5 | 2003-12-21 22:53:21 +0000 | [diff] [blame] | 954 | <a href="http://jigsaw.w3.org/css-validator/check/referer"><img |
Misha Brukman | 4440870 | 2008-12-11 17:34:48 +0000 | [diff] [blame] | 955 | src="http://jigsaw.w3.org/css-validator/images/vcss-blue" alt="Valid CSS"></a> |
Misha Brukman | 2061e89 | 2003-11-22 01:23:39 +0000 | [diff] [blame] | 956 | <a href="http://validator.w3.org/check/referer"><img |
Misha Brukman | 4440870 | 2008-12-11 17:34:48 +0000 | [diff] [blame] | 957 | src="http://www.w3.org/Icons/valid-html401-blue" alt="Valid HTML 4.01"></a> |
Misha Brukman | 2061e89 | 2003-11-22 01:23:39 +0000 | [diff] [blame] | 958 | |
Chris Lattner | b4b0ce7 | 2007-05-18 00:44:29 +0000 | [diff] [blame] | 959 | <a href="http://llvm.org/">LLVM Compiler Infrastructure</a><br> |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 960 | Last modified: $Date$ |
Misha Brukman | 2061e89 | 2003-11-22 01:23:39 +0000 | [diff] [blame] | 961 | </address> |
Chris Lattner | 79c3fe1 | 2003-10-02 04:57:28 +0000 | [diff] [blame] | 962 | |
Misha Brukman | 500bc30 | 2003-11-22 00:38:41 +0000 | [diff] [blame] | 963 | </body> |
| 964 | </html> |