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gerrit-public.fairphone.software / fp2-dev / platform / external / llvm / 32dc4d9cd76795f43478e80eec9b1e073adf0f98 / . / docs / ReleaseNotes.html
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Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]7 <title>LLVM 3.0 Release Notes</title>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]8</head>
9<body>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]10
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]11<h1>LLVM 3.0 Release Notes</h1>
Mikhail Glushenkovea65d7d2008-10-13 02:08:34 +0000[diff] [blame]12
Chris Lattner0e464a92010-03-17 04:02:39 +0000[diff] [blame]13<img align=right src="http://llvm.org/img/DragonSmall.png"
Gabor Greifee2187a2010-04-22 10:21:43 +0000[diff] [blame]14 width="136" height="136" alt="LLVM Dragon Logo">
Chris Lattner0e464a92010-03-17 04:02:39 +0000[diff] [blame]15
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]16<ol>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]17 <li><a href="#intro">Introduction</a></li>
Chris Lattner96a445e2008-10-13 18:01:01 +0000[diff] [blame]18 <li><a href="#subproj">Sub-project Status Update</a></li>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]19 <li><a href="#externalproj">External Projects Using LLVM 3.0</a></li>
20 <li><a href="#whatsnew">What's New in LLVM 3.0?</a></li>
Chris Lattner4b538b92004-04-30 22:17:12 +0000[diff] [blame]21 <li><a href="GettingStarted.html">Installation Instructions</a></li>
Dan Gohman44aa9212008-10-14 16:23:02 +0000[diff] [blame]22 <li><a href="#knownproblems">Known Problems</a></li>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]23 <li><a href="#additionalinfo">Additional Information</a></li>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]24</ol>
25
Chris Lattner7911ce22004-05-23 21:07:27 +0000[diff] [blame]26<div class="doc_author">
NAKAMURA Takumib9a33632011-04-09 02:13:37 +0000[diff] [blame]27 <p>Written by the <a href="http://llvm.org/">LLVM Team</a></p>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]28</div>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]29
Chris Lattner49123fd2011-04-06 06:29:50 +0000[diff] [blame]30<!--
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]31<h1 style="color:red">These are in-progress notes for the upcoming LLVM 3.0
Jeffrey Yasskinbec48772010-01-28 01:14:43 +0000[diff] [blame]32release.<br>
33You may prefer the
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]34<a href="http://llvm.org/releases/2.9/docs/ReleaseNotes.html">LLVM 2.9
Dan Gohmanb44f6c62010-05-03 23:51:05 +0000[diff] [blame]35Release Notes</a>.</h1>
Chris Lattner49123fd2011-04-06 06:29:50 +0000[diff] [blame]36 -->
Jeffrey Yasskinbec48772010-01-28 01:14:43 +0000[diff] [blame]37
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]38<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]39<h2>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]40 <a name="intro">Introduction</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]41</h2>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]42<!-- *********************************************************************** -->
43
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]44<div>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]45
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]46<p>This document contains the release notes for the LLVM Compiler
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]47 Infrastructure, release 3.0. Here we describe the status of LLVM, including
48 major improvements from the previous release and significant known problems.
49 All LLVM releases may be downloaded from
50 the <a href="http://llvm.org/releases/">LLVM releases web site</a>.</p>
Chris Lattner19092612003-10-02 16:38:05 +0000[diff] [blame]51
Chris Lattner7506b1d2004-12-07 08:04:13 +0000[diff] [blame]52<p>For more information about LLVM, including information about the latest
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]53 release, please check out the <a href="http://llvm.org/">main LLVM web
54 site</a>. If you have questions or comments,
55 the <a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVM
56 Developer's Mailing List</a> is a good place to send them.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]57
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]58<p>Note that if you are reading this file from a Subversion checkout or the main
59 LLVM web page, this document applies to the <i>next</i> release, not the
60 current one. To see the release notes for a specific release, please see the
61 <a href="http://llvm.org/releases/">releases page</a>.</p>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]62
63</div>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]64
Chris Lattnere4dc1962011-04-05 23:22:33 +0000[diff] [blame]65<!-- Features that need text if they're finished for 3.1:
66 ARM EHABI
Chris Lattner914ce462010-04-22 06:28:20 +0000[diff] [blame]67 combiner-aa?
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]68 strong phi elim
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]69 loop dependence analysis
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]70 CorrelatedValuePropagation
Chris Lattnere4dc1962011-04-05 23:22:33 +0000[diff] [blame]71 lib/Transforms/IPO/MergeFunctions.cpp => consider for 3.1.
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]72 -->
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]73
Chris Lattner96a445e2008-10-13 18:01:01 +0000[diff] [blame]74<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]75<h2>
Chris Lattner96a445e2008-10-13 18:01:01 +0000[diff] [blame]76 <a name="subproj">Sub-project Status Update</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]77</h2>
Chris Lattner96a445e2008-10-13 18:01:01 +0000[diff] [blame]78<!-- *********************************************************************** -->
Chris Lattnerea34f642008-06-08 21:34:41 +0000[diff] [blame]79
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]80<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]81
82<p>The LLVM 3.0 distribution currently consists of code from the core LLVM
83 repository (which roughly includes the LLVM optimizers, code generators and
84 supporting tools), the Clang repository and the llvm-gcc repository. In
85 addition to this code, the LLVM Project includes other sub-projects that are
86 in development. Here we include updates on these subprojects.</p>
Chris Lattner96a445e2008-10-13 18:01:01 +0000[diff] [blame]87
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]88<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]89<h3>
Chris Lattnerfb97b2d2008-10-13 18:11:54 +0000[diff] [blame]90<a name="clang">Clang: C/C++/Objective-C Frontend Toolkit</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]91</h3>
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]92
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]93<div>
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]94
Chris Lattner095539f2010-04-26 17:42:18 +0000[diff] [blame]95<p><a href="http://clang.llvm.org/">Clang</a> is an LLVM front end for the C,
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]96 C++, and Objective-C languages. Clang aims to provide a better user
97 experience through expressive diagnostics, a high level of conformance to
98 language standards, fast compilation, and low memory use. Like LLVM, Clang
99 provides a modular, library-based architecture that makes it suitable for
100 creating or integrating with other development tools. Clang is considered a
101 production-quality compiler for C, Objective-C, C++ and Objective-C++ on x86
102 (32- and 64-bit), and for darwin/arm targets.</p>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]103
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]104<p>In the LLVM 3.0 time-frame, the Clang team has made many improvements:</p>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]105
106<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]107 <li>Greatly improved support for building C++ applications, with greater
108 stability and better diagnostics.</li>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]109
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]110 <li><a href="http://clang.llvm.org/cxx_status.html">Improved support</a> for
111 the <a href="http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=50372">C++
112 2011</a> standard, including implementations of non-static data member
113 initializers, alias templates, delegating constructors, the range-based
114 for loop, and implicitly-generated move constructors and move assignment
115 operators, among others.</li>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]116
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]117 <li>Implemented support for some features of the upcoming C1x standard,
118 including static assertions and generic selections.</li>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]119
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]120 <li>Better detection of include and linking paths for system headers and
121 libraries, especially for Linux distributions.</li>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]122
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]123 <li>Implemented support
124 for <a href="http://clang.llvm.org/docs/AutomaticReferenceCounting.html">Automatic
125 Reference Counting</a> for Objective-C.</li>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]126
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]127 <li>Implemented a number of optimizations in <tt>libclang</tt>, the Clang C
128 interface, to improve the performance of code completion and the mapping
129 from source locations to abstract syntax tree nodes.</li>
Douglas Gregorba087df2011-10-15 00:48:01 +0000[diff] [blame]130</ul>
131
Chris Lattner0a6f6d52011-04-05 07:19:28 +0000[diff] [blame]132
Duncan Sandsf3ba7af2011-04-06 08:07:40 +0000[diff] [blame]133<p>If Clang rejects your code but another compiler accepts it, please take a
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]134 look at the <a href="http://clang.llvm.org/compatibility.html">language
135 compatibility</a> guide to make sure this is not intentional or a known
136 issue.</p>
Bill Wendling741748a2008-10-27 09:27:33 +0000[diff] [blame]137
Chris Lattnerfb97b2d2008-10-13 18:11:54 +0000[diff] [blame]138</div>
139
140<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]141<h3>
Duncan Sands528a5102011-04-04 11:09:08 +0000[diff] [blame]142<a name="dragonegg">DragonEgg: GCC front-ends, LLVM back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]143</h3>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]144
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]145<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]146<p><a href="http://dragonegg.llvm.org/">DragonEgg</a> is a
147 <a href="http://gcc.gnu.org/wiki/plugins">gcc plugin</a> that replaces GCC's
148 optimizers and code generators with LLVM's. Currently it requires a patched
149 version of gcc-4.5. The plugin can target the x86-32 and x86-64 processor
150 families and has been used successfully on the Darwin, FreeBSD and Linux
151 platforms. The Ada, C, C++ and Fortran languages work well. The plugin is
152 capable of compiling plenty of Obj-C, Obj-C++ and Java but it is not known
153 whether the compiled code actually works or not!</p>
Duncan Sands749fd832010-04-02 09:23:15 +0000[diff] [blame]154
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]155<p>The 3.0 release has the following notable changes:</p>
156
Duncan Sands4b1da2b2010-09-30 17:37:34 +0000[diff] [blame]157<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]158<!--
159<li></li>
160-->
Duncan Sands4b1da2b2010-09-30 17:37:34 +0000[diff] [blame]161</ul>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]162
163</div>
164
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]165<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]166<h3>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]167<a name="compiler-rt">compiler-rt: Compiler Runtime Library</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]168</h3>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]169
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]170<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]171
172<p>The new LLVM <a href="http://compiler-rt.llvm.org/">compiler-rt project</a>
173 is a simple library that provides an implementation of the low-level
174 target-specific hooks required by code generation and other runtime
175 components. For example, when compiling for a 32-bit target, converting a
176 double to a 64-bit unsigned integer is compiled into a runtime call to the
177 "__fixunsdfdi" function. The compiler-rt library provides highly optimized
178 implementations of this and other low-level routines (some are 3x faster than
179 the equivalent libgcc routines).</p>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]180
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]181<p>In the LLVM 3.0 timeframe,</p>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]182
183</div>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]184
185<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]186<h3>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]187<a name="lldb">LLDB: Low Level Debugger</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]188</h3>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]189
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]190<div>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]191
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]192<p>LLDB has advanced by leaps and bounds in the 3.0 timeframe. It is
193 dramatically more stable and useful, and includes both a
194 new <a href="http://lldb.llvm.org/tutorial.html">tutorial</a> and
195 a <a href="http://lldb.llvm.org/lldb-gdb.html">side-by-side comparison with
196 GDB</a>.</p>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]197
198</div>
199
200<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]201<h3>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]202<a name="libc++">libc++: C++ Standard Library</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]203</h3>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]204
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]205<div>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]206
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]207<p>Like compiler_rt, libc++ is now <a href="DeveloperPolicy.html#license">dual
208 licensed</a> under the MIT and UIUC license, allowing it to be used more
209 permissively.</p>
Chris Lattnere07043c2010-09-29 05:30:03 +0000[diff] [blame]210
211</div>
212
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]213
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]214<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]215<h3>
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]216<a name="LLBrowse">LLBrowse: IR Browser</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]217</h3>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]218
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]219<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]220
221<p><a href="http://llvm.org/svn/llvm-project/llbrowse/trunk/doc/LLBrowse.html">
222 LLBrowse</a> is an interactive viewer for LLVM modules. It can load any LLVM
223 module and displays its contents as an expandable tree view, facilitating an
224 easy way to inspect types, functions, global variables, or metadata nodes. It
225 is fully cross-platform, being based on the popular wxWidgets GUI
226 toolkit.</p>
227
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]228</div>
229
230<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]231<h3>
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]232<a name="vmkit">VMKit</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]233</h3>
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]234
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]235<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]236
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]237<p>The <a href="http://vmkit.llvm.org/">VMKit project</a> is an implementation
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]238 of a Java Virtual Machine (Java VM or JVM) that uses LLVM for static and
239 just-in-time compilation. As of LLVM 3.0, VMKit now supports generational
240 garbage collectors. The garbage collectors are provided by the MMTk
241 framework, and VMKit can be configured to use one of the numerous implemented
242 collectors of MMTk.</p>
243
Chris Lattner3d6a80a2011-04-07 03:08:22 +0000[diff] [blame]244</div>
245
246
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]247<!--=========================================================================-->
Chris Lattner7a8e6c52011-04-05 18:38:45 +0000[diff] [blame]248<!--
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]249<h3>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]250<a name="klee">KLEE: A Symbolic Execution Virtual Machine</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]251</h3>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]252
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]253<div>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]254<p>
255<a href="http://klee.llvm.org/">KLEE</a> is a symbolic execution framework for
256programs in LLVM bitcode form. KLEE tries to symbolically evaluate "all" paths
257through the application and records state transitions that lead to fault
258states. This allows it to construct testcases that lead to faults and can even
259be used to verify some algorithms.
260</p>
261
Chris Lattnerbe2e1b52011-03-10 07:43:44 +0000[diff] [blame]262<p>UPDATE!</p>
Chris Lattner7a8e6c52011-04-05 18:38:45 +0000[diff] [blame]263</div>-->
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]264
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]265</div>
Daniel Dunbar97b01a82010-10-04 17:39:47 +0000[diff] [blame]266
Chris Lattnerab68e9e2009-02-26 22:33:38 +0000[diff] [blame]267<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]268<h2>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]269 <a name="externalproj">External Open Source Projects Using LLVM 3.0</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]270</h2>
Chris Lattnerab68e9e2009-02-26 22:33:38 +0000[diff] [blame]271<!-- *********************************************************************** -->
272
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]273<div>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]274
275<p>An exciting aspect of LLVM is that it is used as an enabling technology for
276 a lot of other language and tools projects. This section lists some of the
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]277 projects that have already been updated to work with LLVM 3.0.</p>
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]278
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]279<!--=========================================================================-->
Bill Wendling7be6bc52011-10-26 00:17:54 +0000[diff] [blame]280<h3>AddressSanitizer</h3>
281
282<div>
283
284<p><a href="http://code.google.com/p/address-sanitizer/">AddressSanitizer</a>
285 uses compiler instrumentation and a specialized malloc library to find C/C++
286 bugs such as use-after-free and out-of-bound accesses to heap, stack, and
287 globals. The key feature of the tool is speed: the average slowdown
288 introduced by AddressSanitizer is less than 2x.</p>
289
290</div>
291
292<!--=========================================================================-->
Bill Wendling29817ea2011-10-26 00:14:36 +0000[diff] [blame]293<h3>ClamAV</h3>
294
295<div>
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]296
Bill Wendling29817ea2011-10-26 00:14:36 +0000[diff] [blame]297<p><a href="http://www.clamav.net">Clam AntiVirus</a> is an open source (GPL)
298 anti-virus toolkit for UNIX, designed especially for e-mail scanning on mail
299 gateways.</p>
300
301<p>Since version 0.96 it
302 has <a href="http://vrt-sourcefire.blogspot.com/2010/09/introduction-to-clamavs-low-level.html">bytecode
303 signatures</a> that allow writing detections for complex malware.</p>
304
305<p>It uses LLVM's JIT to speed up the execution of bytecode on X86, X86-64,
306 PPC32/64, falling back to its own interpreter otherwise. The git version was
307 updated to work with LLVM 3.0.</p>
308
309</div>
310
311<!--=========================================================================-->
Bill Wendling65d1f412011-10-26 18:23:06 +0000[diff] [blame]312<h3>clReflect</h3>
313
314<div>
315
316<p><a href="https://bitbucket.org/dwilliamson/clreflect">clReflect</a> is a C++
317 parser that uses clang/LLVM to derive a light-weight reflection database
318 suitable for use in game development. It comes with a very simple runtime
319 library for loading and querying the database, requiring no external
320 dependencies (including CRT), and an additional utility library for object
321 management and serialisation.</p>
322
323</div>
324
325<!--=========================================================================-->
Bill Wendling63507d12011-10-29 01:10:01 +0000[diff] [blame]326<h3>Cling C++ Interpreter</h3>
327
328<div>
329
330<p><a href="http://cern.ch/cling">Cling</a> is an interactive compiler interface
331 (aka C++ interpreter). It uses LLVM's JIT and clang; it currently supports
332 C++ and C. It has a prompt interface, runs source files, calls into shared
333 libraries, prints the value of expressions, even does runtime lookup of
334 identifiers (dynamic scopes). And it just behaves like one would expect from
335 an interpreter.</p>
336
337</div>
338
339<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]340<h3>Crack Programming Language</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]341
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]342<div>
Bill Wendling55d6e672011-11-03 20:10:01 +0000[diff] [blame]343
344<p><a href="http://code.google.com/p/crack-language/">Crack</a> aims to provide
345 the ease of development of a scripting language with the performance of a
346 compiled language. The language derives concepts from C++, Java and Python,
347 incorporating object-oriented programming, operator overloading and strong
348 typing.</p>
349
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]350</div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]351
352<!--=========================================================================-->
Bill Wendlingf9778192011-10-26 00:09:55 +0000[diff] [blame]353<h3>Glasgow Haskell Compiler (GHC)</h3>
354
355<div>
356
357<p>GHC is an open source, state-of-the-art programming suite for Haskell, a
358 standard lazy functional programming language. It includes an optimizing
359 static compiler generating good code for a variety of platforms, together
360 with an interactive system for convenient, quick development.</p>
361
362<p>GHC 7.0 and onwards include an LLVM code generator, supporting LLVM 2.8 and
363 later. Since LLVM 2.9, GHC now includes experimental support for the ARM
364 platform with LLVM 3.0.</p>
365
366</div>
367
368<!--=========================================================================-->
Bill Wendlingf62333d2011-10-25 20:35:31 +0000[diff] [blame]369<h3>gwXscript</h3>
370
371<div>
372
373<p><a href="http://botwars.tk/gwscript/">gwXscript</a> is an object oriented,
Bill Wendling7c38de22011-10-26 04:24:15 +0000[diff] [blame]374 aspect oriented programming language which can create both executables (ELF,
Bill Wendlingf62333d2011-10-25 20:35:31 +0000[diff] [blame]375 EXE) and shared libraries (DLL, SO, DYNLIB). The compiler is implemented in
376 its own language and translates scripts into LLVM-IR which can be optimized
377 and translated into native code by the LLVM framework. Source code in
378 gwScript contains definitions that expand the namespaces. So you can build
379 your project and simply 'plug out' features by removing a file. The remaining
380 project does not leave scars since you directly separate concerns by the
381 'template' feature of gwX. It is also possible to add new features to a
382 project by just adding files and without editing the original project. This
383 language is used for example to create games or content management systems
384 that should be extendable.</p>
385
386<p>gwXscript is strongly typed and offers comfort with its native types string,
387 hash and array. You can easily write new libraries in gwXscript or native
388 code. gwXscript is type safe and users should not be able to crash your
389 program or execute malicious code except code that is eating CPU time.</p>
390
391</div>
392
393<!--=========================================================================-->
Bill Wendling50cacc82011-10-26 22:55:18 +0000[diff] [blame]394<h3>include-what-you-use</h3>
395
396<div>
397
398<p><a href="http://code.google.com/p/include-what-you-use">include-what-you-use</a>
399 is a tool to ensure that a file directly <code>#include</code>s
400 all <code>.h</code> files that provide a symbol that the file uses. It also
401 removes superfluous <code>#include</code>s from source files.</p>
402
403</div>
404
405<!--=========================================================================-->
Bill Wendling32dc4d92011-11-07 22:05:17 +0000[diff] [blame^]406<h3>ispc: The Intel SPMD Program Compiler</h3>
407
408<div>
409
410<p><a href="http://ispc.github.com">ispc</a> is a compiler for "single program,
411 multiple data" (SPMD) programs. It compiles a C-based SPMD programming
412 language to run on the SIMD units of CPUs; it often delivers 5-6x speedups on
413 a single core of a CPU with an 8-wide SIMD unit compared to serial code,
414 while still providing a clean and easy-to-understand programming model. For
415 an introduction to the language and its performance,
416 see <a href="http://ispc.github.com/example.html">the walkthrough of a short
417 example program. ispc is licensed under the BSD license.</p>
418
419</div>
420
421<!--=========================================================================-->
Bill Wendling57fd8762011-10-26 18:20:54 +0000[diff] [blame]422<h3>LanguageKit and Pragmatic Smalltalk</h3>
423
424<div>
425
426<p><a href="http://etoileos.com/etoile/features/languagekit/">LanguageKit</a> is
427 a framework for implementing dynamic languages sharing an object model with
428 Objective-C. It provides static and JIT compilation using LLVM along with
429 its own interpreter. Pragmatic Smalltalk is a dialect of Smalltalk, built on
430 top of LanguageKit, that interfaces directly with Objective-C, sharing the
431 same object representation and message sending behaviour. These projects are
432 developed as part of the &Eacute;toi&eacute; desktop environment.</p>
433
434</div>
435
436<!--=========================================================================-->
Bill Wendling03250532011-11-01 04:08:23 +0000[diff] [blame]437<h3>LuaAV</h3>
438
439<div>
440
441<p><a href="http://lua-av.mat.ucsb.edu/blog/">LuaAV</a> is a real-time
442 audiovisual scripting environment based around the Lua language and a
443 collection of libraries for sound, graphics, and other media protocols. LuaAV
444 uses LLVM and Clang to JIT compile efficient user-defined audio synthesis
445 routines specified in a declarative syntax.</p>
446
447</div>
448
449<!--=========================================================================-->
Bill Wendlingd4821b82011-10-26 00:16:17 +0000[diff] [blame]450<h3>Mono</h3>
451
452<div>
453
454<p>An open source, cross-platform implementation of C# and the CLR that is
455 binary compatible with Microsoft.NET. Has an optional, dynamically-loaded
456 LLVM code generation backend in Mini, the JIT compiler.</p>
457
458<p>Note that we use a Git mirror of LLVM with some patches. See:
459 https://github.com/mono/llvm</p>
460
461</div>
462
463<!--=========================================================================-->
Bill Wendlingba226272011-10-25 20:37:45 +0000[diff] [blame]464<h3>Portable OpenCL (pocl)</h3>
465
466<div>
467
468<p>Portable OpenCL is an open source implementation of the OpenCL standard which
469 can be easily adapted for new targets. One of the goals of the project is
470 improving performance portability of OpenCL programs, avoiding the need for
471 target-dependent manual optimizations. A "native" target is included, which
472 allows running OpenCL kernels on the host (CPU).</p>
473
474</div>
475
476<!--=========================================================================-->
Bill Wendling0bad98c2011-10-25 20:39:06 +0000[diff] [blame]477<h3>Pure</h3>
478
479<div>
480<p><a href="http://pure-lang.googlecode.com/">Pure</a> is an
481 algebraic/functional programming language based on term rewriting. Programs
482 are collections of equations which are used to evaluate expressions in a
483 symbolic fashion. The interpreter uses LLVM as a backend to JIT-compile Pure
484 programs to fast native code. Pure offers dynamic typing, eager and lazy
485 evaluation, lexical closures, a hygienic macro system (also based on term
486 rewriting), built-in list and matrix support (including list and matrix
487 comprehensions) and an easy-to-use interface to C and other programming
488 languages (including the ability to load LLVM bitcode modules, and inline C,
489 C++, Fortran and Faust code in Pure programs if the corresponding LLVM-enabled
490 compilers are installed).</p>
491
492<p>Pure version 0.48 has been tested and is known to work with LLVM 3.0
493 (and continues to work with older LLVM releases &gt;= 2.5).</p>
494
495</div>
496
497<!--=========================================================================-->
Bill Wendling537d85b2011-10-26 00:12:04 +0000[diff] [blame]498<h3>Renderscript</h3>
499
500<div>
501
502<p><a href="http://developer.android.com/guide/topics/renderscript/index.html">Renderscript</a>
503 is Android's advanced 3D graphics rendering and compute API. It provides a
504 portable C99-based language with extensions to facilitate common use cases
505 for enhancing graphics and thread level parallelism. The Renderscript
506 compiler frontend is based on Clang/LLVM. It emits a portable bitcode format
507 for the actual compiled script code, as well as reflects a Java interface for
508 developers to control the execution of the compiled bitcode. Executable
509 machine code is then generated from this bitcode by an LLVM backend on the
510 device. Renderscript is thus able to provide a mechanism by which Android
511 developers can improve performance of their applications while retaining
512 portability.</p>
513
514</div>
515
516<!--=========================================================================-->
Bill Wendling7d5b6212011-10-25 20:40:26 +0000[diff] [blame]517<h3>SAFECode</h3>
518
519<div>
520
521<p><a href="http://safecode.cs.illinois.edu">SAFECode</a> is a memory safe C/C++
522 compiler built using LLVM. It takes standard, unannotated C/C++ code,
523 analyzes the code to ensure that memory accesses and array indexing
524 operations are safe, and instruments the code with run-time checks when
525 safety cannot be proven statically. SAFECode can be used as a debugging aid
526 (like Valgrind) to find and repair memory safety bugs. It can also be used
527 to protect code from security attacks at run-time.</p>
528
529</div>
530
531<!--=========================================================================-->
Bill Wendling02b77b72011-10-26 07:38:19 +0000[diff] [blame]532<h3>The Stupid D Compiler (SDC)</h3>
533
534<div>
535
536<p><a href="https://github.com/bhelyer/SDC">The Stupid D Compiler</a> is a
537 project seeking to write a self-hosting compiler for the D programming
538 language without using the frontend of the reference compiler (DMD).</p>
539
540</div>
541
542<!--=========================================================================-->
Bill Wendling2d7b4af2011-10-25 20:24:32 +0000[diff] [blame]543<h3>TTA-based Co-design Environment (TCE)</h3>
544
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]545<div>
Bill Wendling2d7b4af2011-10-25 20:24:32 +0000[diff] [blame]546
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]547<p>TCE is a toolset for designing application-specific processors (ASP) based on
Bill Wendling2d7b4af2011-10-25 20:24:32 +0000[diff] [blame]548 the Transport triggered architecture (TTA). The toolset provides a complete
549 co-design flow from C/C++ programs down to synthesizable VHDL and parallel
550 program binaries. Processor customization points include the register files,
551 function units, supported operations, and the interconnection network.</p>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]552
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]553<p>TCE uses Clang and LLVM for C/C++ language support, target independent
Bill Wendling2d7b4af2011-10-25 20:24:32 +0000[diff] [blame]554 optimizations and also for parts of code generation. It generates new
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]555 LLVM-based code generators "on the fly" for the designed TTA processors and
556 loads them in to the compiler backend as runtime libraries to avoid
Bill Wendling2d7b4af2011-10-25 20:24:32 +0000[diff] [blame]557 per-target recompilation of larger parts of the compiler chain.</p>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]558
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]559</div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]560
561<!--=========================================================================-->
Bill Wendling628c2662011-10-25 20:27:37 +0000[diff] [blame]562<h3>Tart Programming Language</h3>
563
564<div>
565
566<p><a href="http://code.google.com/p/tart/">Tart</a> is a general-purpose,
567 strongly typed programming language designed for application
568 developers. Strongly inspired by Python and C#, Tart focuses on practical
569 solutions for the professional software developer, while avoiding the clutter
570 and boilerplate of legacy languages like Java and C++. Although Tart is still
571 in development, the current implementation supports many features expected of
572 a modern programming language, such as garbage collection, powerful
573 bidirectional type inference, a greatly simplified syntax for template
574 metaprogramming, closures and function literals, reflection, operator
575 overloading, explicit mutability and immutability, and much more. Tart is
576 flexible enough to accommodate a broad range of programming styles and
577 philosophies, while maintaining a strong commitment to simplicity, minimalism
578 and elegance in design.</p>
579
580</div>
581
582<!--=========================================================================-->
Bill Wendling644ce532011-10-26 09:25:01 +0000[diff] [blame]583<h3>ThreadSanitizer</h3>
584
585<div>
586
587<p><a href="http://code.google.com/p/data-race-test/">ThreadSanitizer</a> is a
588 data race detector for (mostly) C and C++ code, available for Linux, Mac OS
589 and Windows. On different systems, we use binary instrumentation frameworks
Bill Wendlingae8538e2011-10-29 01:11:15 +0000[diff] [blame]590 (Valgrind and Pin) as frontends that generate the program events for the race
591 detection algorithm. On Linux, there's an option of using LLVM-based
592 compile-time instrumentation.</p>
Bill Wendling644ce532011-10-26 09:25:01 +0000[diff] [blame]593
594</div>
595
596<!--=========================================================================-->
Bill Wendling8a924c62011-10-26 07:42:45 +0000[diff] [blame]597<h3>The ZooLib C++ Cross-Platform Application Framework</h3>
598
599<div>
600
601<p><a href="http://www.zoolib.org/">ZooLib</a> is Open Source under the MIT
602 License. It provides GUI, filesystem access, TCP networking, thread-safe
603 memory management, threading and locking for Mac OS X, Classic Mac OS,
604 Microsoft Windows, POSIX operating systems with X11, BeOS, Haiku, Apple's iOS
605 and Research in Motion's BlackBerry.</p>
606
607<p>My current work is to use CLang's static analyzer to improve ZooLib's code
608 quality. I also plan to set up LLVM compiles of the demo programs and test
609 programs using CLang and LLVM on all the platforms that CLang, LLVM and
610 ZooLib all support.</p>
611
612</div>
613
614<!--=========================================================================-->
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]615<!--
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]616<h3>PinaVM</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]617
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]618<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]619<p><a href="http://gitorious.org/pinavm/pages/Home">PinaVM</a> is an open
620source, <a href="http://www.systemc.org/">SystemC</a> front-end. Unlike many
621other front-ends, PinaVM actually executes the elaboration of the
622program analyzed using LLVM's JIT infrastructure. It later enriches the
623bitcode with SystemC-specific information.</p>
624</div>
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]625-->
626
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]627
628<!--=========================================================================-->
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]629<!--
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]630<h3 id="icedtea">IcedTea Java Virtual Machine Implementation</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]631
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]632<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]633<p>
634<a href="http://icedtea.classpath.org/wiki/Main_Page">IcedTea</a> provides a
635harness to build OpenJDK using only free software build tools and to provide
636replacements for the not-yet free parts of OpenJDK. One of the extensions that
637IcedTea provides is a new JIT compiler named <a
638href="http://icedtea.classpath.org/wiki/ZeroSharkFaq">Shark</a> which uses LLVM
639to provide native code generation without introducing processor-dependent
640code.
641</p>
642
643<p> OpenJDK 7 b112, IcedTea6 1.9 and IcedTea7 1.13 and later have been tested
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]644and are known to work with LLVM 3.0 (and continue to work with older LLVM
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]645releases &gt;= 2.6 as well).</p>
646</div>
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]647-->
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]648
649<!--=========================================================================-->
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]650<!--
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]651<h3>Polly - Polyhedral optimizations for LLVM</h3>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]652
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]653<div>
Chris Lattner3bfe57e2011-04-06 01:13:49 +0000[diff] [blame]654<p>Polly is a project that aims to provide advanced memory access optimizations
655to better take advantage of SIMD units, cache hierarchies, multiple cores or
656even vector accelerators for LLVM. Built around an abstract mathematical
657description based on Z-polyhedra, it provides the infrastructure to develop
658advanced optimizations in LLVM and to connect complex external optimizers. In
659its first year of existence Polly already provides an exact value-based
660dependency analysis as well as basic SIMD and OpenMP code generation support.
661Furthermore, Polly can use PoCC(Pluto) an advanced optimizer for data-locality
662and parallelism.</p>
663</div>
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]664-->
Chris Lattner75547712010-10-03 23:49:06 +0000[diff] [blame]665
Chris Lattner0fa5da92011-04-06 16:14:25 +0000[diff] [blame]666<!--=========================================================================-->
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]667<!--
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]668<h3>Rubinius</h3>
Chris Lattner0fa5da92011-04-06 16:14:25 +0000[diff] [blame]669
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]670<div>
Chris Lattner0fa5da92011-04-06 16:14:25 +0000[diff] [blame]671 <p><a href="http://github.com/evanphx/rubinius">Rubinius</a> is an environment
672 for running Ruby code which strives to write as much of the implementation in
673 Ruby as possible. Combined with a bytecode interpreting VM, it uses LLVM to
674 optimize and compile ruby code down to machine code. Techniques such as type
675 feedback, method inlining, and deoptimization are all used to remove dynamism
676 from ruby execution and increase performance.</p>
677</div>
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]678-->
Chris Lattner0fa5da92011-04-06 16:14:25 +0000[diff] [blame]679
Chris Lattnera844a3e2011-04-07 03:09:21 +0000[diff] [blame]680<!--=========================================================================-->
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]681<!--
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]682<h3>
Chris Lattnera844a3e2011-04-07 03:09:21 +0000[diff] [blame]683<a name="FAUST">FAUST Real-Time Audio Signal Processing Language</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]684</h3>
Chris Lattnere0518442010-10-01 06:34:49 +0000[diff] [blame]685
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]686<div>
Chris Lattnera844a3e2011-04-07 03:09:21 +0000[diff] [blame]687<p>
688<a href="http://faust.grame.fr">FAUST</a> is a compiled language for real-time
689audio signal processing. The name FAUST stands for Functional AUdio STream. Its
690programming model combines two approaches: functional programming and block
691diagram composition. In addition with the C, C++, JAVA output formats, the
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]692Faust compiler can now generate LLVM bitcode, and works with LLVM 2.7-3.0.</p>
Chris Lattnera844a3e2011-04-07 03:09:21 +0000[diff] [blame]693
694</div>
Bill Wendlingf2a78332011-10-25 01:01:42 +0000[diff] [blame]695-->
Chris Lattnera844a3e2011-04-07 03:09:21 +0000[diff] [blame]696
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]697</div>
698
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]699<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]700<h2>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]701 <a name="whatsnew">What's New in LLVM 3.0?</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]702</h2>
Chris Lattner8348b472008-06-08 21:58:17 +0000[diff] [blame]703<!-- *********************************************************************** -->
704
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]705<div>
Chris Lattnerf8e0b4e2008-06-08 22:59:35 +0000[diff] [blame]706
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]707<p>This release includes a huge number of bug fixes, performance tweaks and
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]708 minor improvements. Some of the major improvements and new features are
709 listed in this section.</p>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]710
Chris Lattner914ce462010-04-22 06:28:20 +0000[diff] [blame]711<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]712<h3>
Chris Lattner252b83d2008-02-06 18:00:06 +0000[diff] [blame]713<a name="majorfeatures">Major New Features</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]714</h3>
Chris Lattner252b83d2008-02-06 18:00:06 +0000[diff] [blame]715
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]716<div>
Chris Lattner252b83d2008-02-06 18:00:06 +0000[diff] [blame]717
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]718<p>LLVM 3.0 includes several major new capabilities:</p>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]719
720<ul>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]721
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]722<!--
723<li></li>
724-->
Chris Lattner7a8e6c52011-04-05 18:38:45 +0000[diff] [blame]725
Chris Lattner8170c102008-02-10 08:18:42 +0000[diff] [blame]726</ul>
Chris Lattner0a6f6d52011-04-05 07:19:28 +0000[diff] [blame]727
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]728</div>
729
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]730<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]731<h3>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]732<a name="coreimprovements">LLVM IR and Core Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]733</h3>
Chris Lattnerf304ffc2008-02-10 08:17:19 +0000[diff] [blame]734
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]735<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]736
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]737<p>LLVM IR has several new features for better support of new targets and that
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]738 expose new optimization opportunities:</p>
Chris Lattnerf304ffc2008-02-10 08:17:19 +0000[diff] [blame]739
Bill Wendlingbc5f6dd2011-10-26 18:33:01 +0000[diff] [blame]740<p>One of the biggest changes is that 3.0 has a new exception handling
741 system. The old system used LLVM intrinsics to convey the exception handling
742 information to the code generator. It worked in most cases, but not
743 all. Inlining was especially difficult to get right. Also, the intrinsics
744 could be moved away from the <code>invoke</code> instruction, making it hard
745 to recover that information.</p>
746
747<p>The new EH system makes exception handling a first-class member of the IR. It
748 adds two new instructions:</p>
749
Chris Lattner791f77b2008-06-05 06:25:56 +0000[diff] [blame]750<ul>
Bill Wendlingbc5f6dd2011-10-26 18:33:01 +0000[diff] [blame]751 <li><a href="LangRef.html#i_landingpad"><code>landingpad</code></a> &mdash;
752 this instruction defines a landing pad basic block. It contains all of the
753 information that's needed by the code generator. It's also required to be
754 the first non-PHI instruction in the landing pad. In addition, a landing
755 pad may be jumped to only by the unwind edge of an <code>invoke</code>
756 instruction.</li>
757
758 <li><a href="LangRef.html#i_resume"><code>resume</code></a> &mdash; this
759 instruction causes the current exception to resume traveling up the
760 stack. It replaces the <code>@llvm.eh.resume</code> intrinsic.</li>
Chris Lattnerf304ffc2008-02-10 08:17:19 +0000[diff] [blame]761</ul>
Mikhail Glushenkovea65d7d2008-10-13 02:08:34 +0000[diff] [blame]762
Bill Wendlingbc5f6dd2011-10-26 18:33:01 +0000[diff] [blame]763<p>Converting from the old EH API to the new EH API is rather simple, because a
764 lot of complexity has been removed. The two intrinsics,
765 <code>@llvm.eh.exception</code> and <code>@llvm.eh.selector</code> have been
766 superceded by the <code>landingpad</code> instruction. Instead of generating
767 a call to <code>@llvm.eh.exception</code> and <code>@llvm.eh.selector</code>:
768
769<div class="doc_code">
770<pre>
771Function *ExcIntr = Intrinsic::getDeclaration(TheModule,
772 Intrinsic::eh_exception);
773Function *SlctrIntr = Intrinsic::getDeclaration(TheModule,
774 Intrinsic::eh_selector);
775
776// The exception pointer.
777Value *ExnPtr = Builder.CreateCall(ExcIntr, "exc_ptr");
778
779std::vector&lt;Value*&gt; Args;
780Args.push_back(ExnPtr);
781Args.push_back(Builder.CreateBitCast(Personality,
782 Type::getInt8PtrTy(Context)));
783
784<i>// Add selector clauses to Args.</i>
785
786// The selector call.
787Builder.CreateCall(SlctrIntr, Args, "exc_sel");
788</pre>
789</div>
790
791<p>You should instead generate a <code>landingpad</code> instruction, that
792 returns an exception object and selector value:</p>
793
794<div class="doc_code">
795<pre>
796LandingPadInst *LPadInst =
797 Builder.CreateLandingPad(StructType::get(Int8PtrTy, Int32Ty, NULL),
798 Personality, 0);
799
800Value *LPadExn = Builder.CreateExtractValue(LPadInst, 0);
801Builder.CreateStore(LPadExn, getExceptionSlot());
802
803Value *LPadSel = Builder.CreateExtractValue(LPadInst, 1);
804Builder.CreateStore(LPadSel, getEHSelectorSlot());
805</pre>
806</div>
807
808<p>It's now trivial to add the individual clauses to the <code>landingpad</code>
809 instruction.</p>
810
811<div class="doc_code">
812<pre>
813<i><b>// Adding a catch clause</b></i>
814Constant *TypeInfo = getTypeInfo();
815LPadInst-&gt;addClause(TypeInfo);
816
817<i><b>// Adding a C++ catch-all</b></i>
818LPadInst-&gt;addClause(Constant::getNullValue(Builder.getInt8PtrTy()));
819
820<i><b>// Adding a cleanup</b></i>
821LPadInst-&gt;setCleanup(true);
822
823<i><b>// Adding a filter clause</b></i>
824std::vector&lt;Constant*&gt; TypeInfos;
825Constant *TypeInfo = getFilterTypeInfo();
826TypeInfos.push_back(Builder.CreateBitCast(TypeInfo, Builder.getInt8PtrTy()));
827
828ArrayType *FilterTy = ArrayType::get(Int8PtrTy, TypeInfos.size());
829LPadInst-&gt;addClause(ConstantArray::get(FilterTy, TypeInfos));
830</pre>
831</div>
832
833<p>Converting from using the <code>@llvm.eh.resume</code> intrinsic to
834 the <code>resume</code> instruction is trivial. It takes the exception
835 pointer and exception selector values returned by
836 the <code>landingpad</code> instruction:</p>
837
838<div class="doc_code">
839<pre>
840Type *UnwindDataTy = StructType::get(Builder.getInt8PtrTy(),
841 Builder.getInt32Ty(), NULL);
842Value *UnwindData = UndefValue::get(UnwindDataTy);
843Value *ExcPtr = Builder.CreateLoad(getExceptionObjSlot());
844Value *ExcSel = Builder.CreateLoad(getExceptionSelSlot());
845UnwindData = Builder.CreateInsertValue(UnwindData, ExcPtr, 0, "exc_ptr");
846UnwindData = Builder.CreateInsertValue(UnwindData, ExcSel, 1, "exc_sel");
847Builder.CreateResume(UnwindData);
848</pre>
849</div>
850
Chris Lattnerf304ffc2008-02-10 08:17:19 +0000[diff] [blame]851</div>
852
853<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]854<h3>
Andrew Trick5aab6382011-11-06 17:59:24 +0000[diff] [blame]855<a name="loopoptimization">Loop Optimization Improvements</a>
856</h3>
857
858<div>
859<p>The induction variable simplification pass in 3.0 only modifies
860 induction variables when profitable. Sign and zero extension
861 elimination, linear function test replacement, loop unrolling, and
862 other simplifications that require induction variable analysis have
863 been generalized so they no longer require loops to be rewritten in a
864 typically suboptimal form prior to optimization. This new design
865 preserves more IR level information, avoids undoing earlier loop
866 optimizations (particularly hand-optimized loops), and no longer
867 strongly depends on the code generator rewriting loops a second time
868 in a now optimal form--an intractable problem.</p>
869
870<p>The original behavior can be restored with -mllvm -enable-iv-rewrite;
871 however, support for this mode will be short lived. As such, bug
872 reports should be filed for any significant performance regressions
873 when moving from -mllvm -enable-iv-rewrite to the 3.0 default mode.</p>
874</div>
875
876<!--=========================================================================-->
877<h3>
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]878<a name="optimizer">Optimizer Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]879</h3>
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]880
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]881<div>
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]882
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]883<p>In addition to a large array of minor performance tweaks and bug fixes, this
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]884 release includes a few major enhancements and additions to the
885 optimizers:</p>
Chris Lattneracce85d2008-02-10 07:46:44 +0000[diff] [blame]886
887<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]888<!--
889<li></li>
890-->
Chris Lattnerc5ac61d2011-04-06 05:50:04 +0000[diff] [blame]891</li>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]892
Chris Lattner11b66112010-10-04 02:42:39 +0000[diff] [blame]893</ul>
894
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]895</div>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]896
Chris Lattner0b832202008-06-08 02:45:07 +0000[diff] [blame]897<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]898<h3>
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]899<a name="mc">MC Level Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]900</h3>
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]901
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]902<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]903
904<p>The LLVM Machine Code (aka MC) subsystem was created to solve a number of
905 problems in the realm of assembly, disassembly, object file format handling,
906 and a number of other related areas that CPU instruction-set level tools work
907 in.</p>
Chris Lattner7d9b6b42010-10-02 21:59:30 +0000[diff] [blame]908
Chris Lattner7d9b6b42010-10-02 21:59:30 +0000[diff] [blame]909<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]910<!--
911<li></li>
912-->
Chris Lattner7d9b6b42010-10-02 21:59:30 +0000[diff] [blame]913</ul>
914
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]915<p>For more information, please see
916 the <a href="http://blog.llvm.org/2010/04/intro-to-llvm-mc-project.html">Intro
917 to the LLVM MC Project Blog Post</a>.</p>
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]918
NAKAMURA Takumi45c435a2011-04-05 08:24:22 +0000[diff] [blame]919</div>
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]920
Chris Lattner4ba2b652010-09-30 16:31:33 +0000[diff] [blame]921<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]922<h3>
Chris Lattner511433e2009-03-02 03:24:11 +0000[diff] [blame]923<a name="codegen">Target Independent Code Generator Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]924</h3>
Chris Lattner0b832202008-06-08 02:45:07 +0000[diff] [blame]925
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]926<div>
Chris Lattner0b832202008-06-08 02:45:07 +0000[diff] [blame]927
Mikhail Glushenkovf795ef02009-03-01 18:09:47 +0000[diff] [blame]928<p>We have put a significant amount of work into the code generator
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]929 infrastructure, which allows us to implement more aggressive algorithms and
930 make it run faster:</p>
Chris Lattner0b832202008-06-08 02:45:07 +0000[diff] [blame]931
932<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]933<!--
934<li></li>
935-->
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]936</ul>
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]937</div>
938
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]939<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]940<h3>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]941<a name="x86">X86-32 and X86-64 Target Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]942</h3>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]943
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]944<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]945
946<p>New features and major changes in the X86 target include:</p>
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]947
948<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]949
950 <li>The CRC32 intrinsics have been renamed. The intrinsics were previously
951 <code>@llvm.x86.sse42.crc32.[8|16|32]</code>
952 and <code>@llvm.x86.sse42.crc64.[8|64]</code>. They have been renamed to
953 <code>@llvm.x86.sse42.crc32.32.[8|16|32]</code> and
954 <code>@llvm.x86.sse42.crc32.64.[8|64]</code>.</li>
Chad Rosierf94c9c12011-05-27 20:13:10 +0000[diff] [blame]955
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]956</ul>
957
Chris Lattner917cc712009-03-02 02:37:32 +0000[diff] [blame]958</div>
Chris Lattner84977642007-09-21 03:54:09 +0000[diff] [blame]959
960<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]961<h3>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]962<a name="ARM">ARM Target Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]963</h3>
Chris Lattnerc441fb82009-03-01 02:30:21 +0000[diff] [blame]964
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]965<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]966
967<p>New features of the ARM target include:</p>
Chris Lattnerc441fb82009-03-01 02:30:21 +0000[diff] [blame]968
969<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]970<!--
971<li></li>
972-->
Bob Wilsone8472772010-09-13 17:39:35 +0000[diff] [blame]973</ul>
Chris Lattner61358ab2009-10-13 17:48:04 +0000[diff] [blame]974</div>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]975
976<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]977<h3>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]978<a name="OtherTS">Other Target Specific Improvements</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]979</h3>
Chris Lattnerc441fb82009-03-01 02:30:21 +0000[diff] [blame]980
Roman Divacky223764c2011-10-30 07:49:04 +0000[diff] [blame]981<p>PPC32/ELF va_arg was implemented.</p>
982<p>PPC32 initial support for .o file writing was implemented.</p>
983
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]984<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]985
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]986<ul>
Chad Rosiere6291d02011-05-27 22:50:46 +0000[diff] [blame]987<!--
988<li></li>
989-->
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]990</ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]991
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]992</div>
Chris Lattner77d29b12008-06-05 08:02:49 +0000[diff] [blame]993
994<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]995<h3>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]996<a name="changes">Major Changes and Removed Features</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]997</h3>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]998
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]999<div>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]1000
Bill Wendling2626dba2011-08-03 22:18:20 +0000[diff] [blame]1001<p>If you're already an LLVM user or developer with out-of-tree changes based on
1002 LLVM 2.9, this section lists some "gotchas" that you may run into upgrading
1003 from the previous release.</p>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]1004
1005<ul>
Eric Christopher90d6ec52011-09-28 19:47:28 +0000[diff] [blame]1006 <li>The <code>LLVMC</code> front end code was removed while separating
1007 out language independence.</li>
Jay Foadf42e9b22011-08-04 10:43:43 +0000[diff] [blame]1008 <li>The <code>LowerSetJmp</code> pass wasn't used effectively by any
1009 target and has been removed.</li>
Rafael Espindolaf940a1a2011-08-30 23:03:45 +0000[diff] [blame]1010 <li>The old <code>TailDup</code> pass was not used in the standard pipeline
1011 and was unable to update ssa form, so it has been removed.
Eli Friedmanf03bb262011-08-12 22:50:01 +0000[diff] [blame]1012 <li>The syntax of volatile loads and stores in IR has been changed to
1013 "<code>load volatile</code>"/"<code>store volatile</code>". The old
1014 syntax ("<code>volatile load</code>"/"<code>volatile store</code>")
1015 is still accepted, but is now considered deprecated.</li>
Eli Friedman526e1bb2011-10-26 00:55:23 +0000[diff] [blame]1016 <li>The old atomic intrinscs (<code>llvm.memory.barrier</code> and
1017 <code>llvm.atomic.*</code>) are now gone. Please use the new atomic
1018 instructions, described in the <a href="Atomics.html">atomics guide</a>.
Devang Patelb34dd132008-10-14 20:03:43 +0000[diff] [blame]1019</ul>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]1020
NAKAMURA Takumi2026de22011-08-22 23:22:05 +0000[diff] [blame]1021<h4>Windows (32-bit)</h4>
1022<div>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1023
NAKAMURA Takumi2026de22011-08-22 23:22:05 +0000[diff] [blame]1024<ul>
1025 <li>On Win32(MinGW32 and MSVC), Windows 2000 will not be supported.
1026 Windows XP or higher is required.</li>
1027</ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1028
NAKAMURA Takumi2026de22011-08-22 23:22:05 +0000[diff] [blame]1029</div>
1030
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]1031</div>
1032
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]1033<!--=========================================================================-->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1034<h3>
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]1035<a name="api_changes">Internal API Changes</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1036</h3>
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]1037
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1038<div>
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]1039
Chris Lattner1efe27e2011-04-06 00:45:11 +0000[diff] [blame]1040<p>In addition, many APIs have changed in this release. Some of the major
Bill Wendling16005252011-08-02 06:20:17 +0000[diff] [blame]1041 LLVM API changes are:</p>
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]1042
1043<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1044 <li>The biggest and most pervasive change is that llvm::Type's are no longer
1045 returned or accepted as 'const' values. Instead, just pass around
1046 non-const Type's.</li>
Chris Lattnerd1324302011-07-18 04:56:02 +0000[diff] [blame]1047
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1048 <li><code>PHINode::reserveOperandSpace</code> has been removed. Instead, you
1049 must specify how many operands to reserve space for when you create the
1050 PHINode, by passing an extra argument
1051 into <code>PHINode::Create</code>.</li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1052
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1053 <li>PHINodes no longer store their incoming BasicBlocks as operands. Instead,
1054 the list of incoming BasicBlocks is stored separately, and can be accessed
1055 with new functions <code>PHINode::block_begin</code>
1056 and <code>PHINode::block_end</code>.</li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1057
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1058 <li>Various functions now take an <code>ArrayRef</code> instead of either a
1059 pair of pointers (or iterators) to the beginning and end of a range, or a
1060 pointer and a length. Others now return an <code>ArrayRef</code> instead
1061 of a reference to a <code>SmallVector</code>
1062 or <code>std::vector</code>. These include:
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1063<ul>
1064<!-- Please keep this list sorted. -->
Jay Foada3efbb12011-07-15 08:37:34 +0000[diff] [blame]1065<li><code>CallInst::Create</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1066<li><code>ComputeLinearIndex</code> (in <code>llvm/CodeGen/Analysis.h</code>)</li>
1067<li><code>ConstantArray::get</code></li>
1068<li><code>ConstantExpr::getExtractElement</code></li>
Jay Foaddab3d292011-07-21 14:31:17 +0000[diff] [blame]1069<li><code>ConstantExpr::getGetElementPtr</code></li>
1070<li><code>ConstantExpr::getInBoundsGetElementPtr</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1071<li><code>ConstantExpr::getIndices</code></li>
1072<li><code>ConstantExpr::getInsertElement</code></li>
1073<li><code>ConstantExpr::getWithOperands</code></li>
Jay Foad1d2f5692011-07-19 13:32:40 +0000[diff] [blame]1074<li><code>ConstantFoldCall</code> (in <code>llvm/Analysis/ConstantFolding.h</code>)</li>
1075<li><code>ConstantFoldInstOperands</code> (in <code>llvm/Analysis/ConstantFolding.h</code>)</li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1076<li><code>ConstantVector::get</code></li>
1077<li><code>DIBuilder::createComplexVariable</code></li>
1078<li><code>DIBuilder::getOrCreateArray</code></li>
1079<li><code>ExtractValueInst::Create</code></li>
1080<li><code>ExtractValueInst::getIndexedType</code></li>
1081<li><code>ExtractValueInst::getIndices</code></li>
1082<li><code>FindInsertedValue</code> (in <code>llvm/Analysis/ValueTracking.h</code>)</li>
Jay Foadca12a212011-07-19 14:42:50 +0000[diff] [blame]1083<li><code>gep_type_begin</code> (in <code>llvm/Support/GetElementPtrTypeIterator.h</code>)</li>
1084<li><code>gep_type_end</code> (in <code>llvm/Support/GetElementPtrTypeIterator.h</code>)</li>
Jay Foada9203102011-07-25 09:48:08 +0000[diff] [blame]1085<li><code>GetElementPtrInst::Create</code></li>
1086<li><code>GetElementPtrInst::CreateInBounds</code></li>
1087<li><code>GetElementPtrInst::getIndexedType</code></li>
Jay Foadb60e8512011-07-21 14:42:51 +0000[diff] [blame]1088<li><code>InsertValueInst::Create</code></li>
1089<li><code>InsertValueInst::getIndices</code></li>
1090<li><code>InvokeInst::Create</code></li>
Jay Foada3efbb12011-07-15 08:37:34 +0000[diff] [blame]1091<li><code>IRBuilder::CreateCall</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1092<li><code>IRBuilder::CreateExtractValue</code></li>
Jay Foad0a2a60a2011-07-22 08:16:57 +0000[diff] [blame]1093<li><code>IRBuilder::CreateGEP</code></li>
1094<li><code>IRBuilder::CreateInBoundsGEP</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1095<li><code>IRBuilder::CreateInsertValue</code></li>
Jay Foada3efbb12011-07-15 08:37:34 +0000[diff] [blame]1096<li><code>IRBuilder::CreateInvoke</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1097<li><code>MDNode::get</code></li>
1098<li><code>MDNode::getIfExists</code></li>
1099<li><code>MDNode::getTemporary</code></li>
1100<li><code>MDNode::getWhenValsUnresolved</code></li>
Jay Foadb9b54eb2011-07-19 15:07:52 +0000[diff] [blame]1101<li><code>SimplifyGEPInst</code> (in <code>llvm/Analysis/InstructionSimplify.h</code>)</li>
Jay Foad8fbbb392011-07-19 14:01:37 +0000[diff] [blame]1102<li><code>TargetData::getIndexedOffset</code></li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1103</ul></li>
1104
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1105 <li>All forms of <code>StringMap::getOrCreateValue</code> have been remove
1106 except for the one which takes a <code>StringRef</code>.</li>
Jay Foad558d3762011-07-14 09:19:05 +0000[diff] [blame]1107
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1108 <li>The <code>LLVMBuildUnwind</code> function from the C API was removed. The
1109 LLVM <code>unwind</code> instruction has been deprecated for a long time
1110 and isn't used by the current front-ends. So this was removed during the
1111 exception handling rewrite.</li>
Bill Wendling16005252011-08-02 06:20:17 +0000[diff] [blame]1112
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1113 <li>The <code>LLVMAddLowerSetJmpPass</code> function from the C API was
1114 removed because the <code>LowerSetJmp</code> pass was removed.</li>
Bill Wendling2626dba2011-08-03 22:18:20 +0000[diff] [blame]1115
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1116 <li>The <code>DIBuilder</code> interface used by front ends to encode
1117 debugging information in the LLVM IR now expects clients to
1118 use <code>DIBuilder::finalize()</code> at the end of translation unit to
1119 complete debugging information encoding.</li>
Devang Patel6326a422011-08-15 23:00:00 +0000[diff] [blame]1120
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1121 <li>The way the type system works has been
1122 rewritten: <code>PATypeHolder</code> and <code>OpaqueType</code> are gone,
1123 and all APIs deal with <code>Type*</code> instead of <code>const
1124 Type*</code>. If you need to create recursive structures, then create a
1125 named structure, and use <code>setBody()</code> when all its elements are
1126 built. Type merging and refining is gone too: named structures are not
1127 merged with other structures, even if their layout is identical. (of
1128 course anonymous structures are still uniqued by layout).</li>
Torok Edwinf16e2d42011-09-30 13:07:52 +0000[diff] [blame]1129
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1130 <li>TargetSelect.h moved to Support/ from Target/</li>
Torok Edwinf16e2d42011-09-30 13:07:52 +0000[diff] [blame]1131
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1132 <li>UpgradeIntrinsicCall no longer upgrades pre-2.9 intrinsic calls (for
1133 example <code>llvm.memset.i32</code>).</li>
Torok Edwinf16e2d42011-09-30 13:07:52 +0000[diff] [blame]1134
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1135 <li>It is mandatory to initialize all out-of-tree passes too and their dependencies now with
1136 <code>INITIALIZE_PASS{BEGIN,END,}</code>
1137 and <code>INITIALIZE_{PASS,AG}_DEPENDENCY</code>.</li>
Torok Edwinf16e2d42011-09-30 13:07:52 +0000[diff] [blame]1138
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1139 <li>The interface for MemDepResult in MemoryDependenceAnalysis has been
1140 enhanced with new return types Unknown and NonFuncLocal, in addition to
1141 the existing types Clobber, Def, and NonLocal.</li>
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]1142</ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1143
Daniel Dunbarf0233c62010-10-04 20:11:41 +0000[diff] [blame]1144</div>
Chris Lattnerf6662f92008-10-13 17:57:36 +0000[diff] [blame]1145
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1146</div>
1147
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1148<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1149<h2>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1150 <a name="knownproblems">Known Problems</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1151</h2>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1152<!-- *********************************************************************** -->
1153
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1154<div>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1155
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1156<p>This section contains significant known problems with the LLVM system, listed
1157 by component. If you run into a problem, please check
1158 the <a href="http://llvm.org/bugs/">LLVM bug database</a> and submit a bug if
1159 there isn't already one.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1160
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]1161<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1162<h3>
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]1163 <a name="experimental">Experimental features included with this release</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1164</h3>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1165
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1166<div>
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]1167
Misha Brukman6df9e2c2004-05-12 21:46:05 +0000[diff] [blame]1168<p>The following components of this LLVM release are either untested, known to
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1169 be broken or unreliable, or are in early development. These components
1170 should not be relied on, and bugs should not be filed against them, but they
1171 may be useful to some people. In particular, if you would like to work on
1172 one of these components, please contact us on
1173 the <a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVMdev
1174 list</a>.</p>
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]1175
1176<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1177 <li>The Alpha, Blackfin, CellSPU, MicroBlaze, MSP430, MIPS, PTX, SystemZ and
1178 XCore backends are experimental.</li>
1179
1180 <li><tt>llc</tt> "<tt>-filetype=obj</tt>" is experimental on all targets other
1181 than darwin and ELF X86 systems.</li>
Chris Lattnerf5ee1702004-03-14 02:03:02 +0000[diff] [blame]1182</ul>
1183
1184</div>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1185
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1186<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1187<h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1188 <a name="x86-be">Known problems with the X86 back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1189</h3>
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]1190
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1191<div>
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]1192
1193<ul>
Anton Korobeynikova6094be2008-06-08 10:24:13 +0000[diff] [blame]1194 <li>The X86 backend does not yet support
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1195 all <a href="http://llvm.org/PR879">inline assembly that uses the X86
1196 floating point stack</a>. It supports the 'f' and 't' constraints, but
1197 not 'u'.</li>
1198
Dan Gohman8207ba92008-06-08 23:05:11 +0000[diff] [blame]1199 <li>The X86-64 backend does not yet support the LLVM IR instruction
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1200 <tt>va_arg</tt>. Currently, front-ends support variadic argument
1201 constructs on X86-64 by lowering them manually.</li>
1202
NAKAMURA Takumi45c435a2011-04-05 08:24:22 +0000[diff] [blame]1203 <li>Windows x64 (aka Win64) code generator has a few issues.
1204 <ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1205 <li>llvm-gcc cannot build the mingw-w64 runtime currently due to lack of
1206 support for the 'u' inline assembly constraint and for X87 floating
1207 point inline assembly.</li>
1208
1209 <li>On mingw-w64, you will see unresolved symbol <tt>__chkstk</tt> due
1210 to <a href="http://llvm.org/bugs/show_bug.cgi?id=8919">Bug 8919</a>.
1211 It is fixed
1212 in <a href="http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20110321/118499.html">r128206</a>.</li>
1213
NAKAMURA Takumi45c435a2011-04-05 08:24:22 +0000[diff] [blame]1214 <li>Miss-aligned MOVDQA might crash your program. It is due to
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1215 <a href="http://llvm.org/bugs/show_bug.cgi?id=9483">Bug 9483</a>, lack
1216 of handling aligned internal globals.</li>
NAKAMURA Takumi45c435a2011-04-05 08:24:22 +0000[diff] [blame]1217 </ul>
1218 </li>
1219
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1220</ul>
1221
1222</div>
1223
1224<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1225<h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1226 <a name="ppc-be">Known problems with the PowerPC back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1227</h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1228
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1229<div>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1230
1231<ul>
Roman Divacky223764c2011-10-30 07:49:04 +0000[diff] [blame]1232 <li>The PPC32/ELF support lacks PIC support.</li>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1233</ul>
1234
1235</div>
1236
1237<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1238<h3>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]1239 <a name="arm-be">Known problems with the ARM back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1240</h3>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]1241
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1242<div>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]1243
1244<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1245 <li>Thumb mode works only on ARMv6 or higher processors. On sub-ARMv6
1246 processors, thumb programs can crash or produce wrong results
1247 (<a href="http://llvm.org/PR1388">PR1388</a>).</li>
1248
1249 <li>Compilation for ARM Linux OABI (old ABI) is supported but not fully
1250 tested.</li>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]1251</ul>
1252
1253</div>
1254
1255<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1256<h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1257 <a name="sparc-be">Known problems with the SPARC back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1258</h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1259
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1260<div>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1261
1262<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1263 <li>The SPARC backend only supports the 32-bit SPARC ABI (-m32); it does not
1264 support the 64-bit SPARC ABI (-m64).</li>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1265</ul>
1266
1267</div>
1268
1269<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1270<h3>
Bruno Cardoso Lopesb7e1a4f2008-10-25 14:56:26 +0000[diff] [blame]1271 <a name="mips-be">Known problems with the MIPS back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1272</h3>
Bruno Cardoso Lopesb7e1a4f2008-10-25 14:56:26 +0000[diff] [blame]1273
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1274<div>
Bruno Cardoso Lopesb7e1a4f2008-10-25 14:56:26 +0000[diff] [blame]1275
1276<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1277 <li>64-bit MIPS targets are not supported yet.</li>
Bruno Cardoso Lopesb7e1a4f2008-10-25 14:56:26 +0000[diff] [blame]1278</ul>
1279
1280</div>
1281
1282<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1283<h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1284 <a name="alpha-be">Known problems with the Alpha back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1285</h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1286
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1287<div>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1288
1289<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1290 <li>On 21164s, some rare FP arithmetic sequences which may trap do not have
1291 the appropriate nops inserted to ensure restartability.</li>
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]1292</ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1293
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]1294</div>
1295
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1296<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1297<h3>
Chris Lattnerf3e5bc62007-05-14 06:56:09 +0000[diff] [blame]1298 <a name="c-be">Known problems with the C back-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1299</h3>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1300
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1301<div>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1302
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]1303<p>The C backend has numerous problems and is not being actively maintained.
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1304 Depending on it for anything serious is not advised.</p>
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]1305
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1306<ul>
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1307 <li><a href="http://llvm.org/PR802">The C backend has only basic support for
1308 inline assembly code</a>.</li>
1309
1310 <li><a href="http://llvm.org/PR1658">The C backend violates the ABI of common
1311 C++ programs</a>, preventing intermixing between C++ compiled by the CBE
1312 and C++ code compiled with <tt>llc</tt> or native compilers.</li>
1313
1314 <li>The C backend does not support all exception handling constructs.</li>
1315
1316 <li>The C backend does not support arbitrary precision integers.</li>
Chris Lattner26299222006-11-18 07:51:14 +0000[diff] [blame]1317</ul>
1318
1319</div>
John Criswellc0c186d2005-11-08 21:11:33 +0000[diff] [blame]1320
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1321
1322<!-- ======================================================================= -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1323<h3>
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]1324 <a name="llvm-gcc">Known problems with the llvm-gcc front-end</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1325</h3>
Chris Lattner47588f92003-10-02 05:07:23 +0000[diff] [blame]1326
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1327<div>
Chris Lattnerc5d658a2006-03-03 00:34:26 +0000[diff] [blame]1328
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1329<p><b>LLVM 2.9 was the last release of llvm-gcc.</b></p>
Chris Lattner49123fd2011-04-06 06:29:50 +0000[diff] [blame]1330
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]1331<p>llvm-gcc is generally very stable for the C family of languages. The only
1332 major language feature of GCC not supported by llvm-gcc is the
1333 <tt>__builtin_apply</tt> family of builtins. However, some extensions
1334 are only supported on some targets. For example, trampolines are only
1335 supported on some targets (these are used when you take the address of a
1336 nested function).</p>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1337
Chris Lattner3016ee92010-09-29 05:34:42 +0000[diff] [blame]1338<p>Fortran support generally works, but there are still several unresolved bugs
1339 in <a href="http://llvm.org/bugs/">Bugzilla</a>. Please see the
1340 tools/gfortran component for details. Note that llvm-gcc is missing major
1341 Fortran performance work in the frontend and library that went into GCC after
1342 4.2. If you are interested in Fortran, we recommend that you consider using
1343 <a href="#dragonegg">dragonegg</a> instead.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1344
Duncan Sands3af96332010-10-04 10:06:56 +0000[diff] [blame]1345<p>The llvm-gcc 4.2 Ada compiler has basic functionality, but is no longer being
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1346 actively maintained. If you are interested in Ada, we recommend that you
1347 consider using <a href="#dragonegg">dragonegg</a> instead.</p>
1348
Chris Lattner2b659ef2008-02-12 06:29:45 +0000[diff] [blame]1349</div>
1350
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1351</div>
1352
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1353<!-- *********************************************************************** -->
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1354<h2>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1355 <a name="additionalinfo">Additional Information</a>
NAKAMURA Takumi06c6d9a2011-04-18 01:17:51 +0000[diff] [blame]1356</h2>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1357<!-- *********************************************************************** -->
1358
NAKAMURA Takumi074eeaa2011-04-21 01:52:00 +0000[diff] [blame]1359<div>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1360
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1361<p>A wide variety of additional information is available on
1362 the <a href="http://llvm.org/">LLVM web page</a>, in particular in
1363 the <a href="http://llvm.org/docs/">documentation</a> section. The web page
1364 also contains versions of the API documentation which is up-to-date with the
1365 Subversion version of the source code. You can access versions of these
1366 documents specific to this release by going into the "<tt>llvm/doc/</tt>"
1367 directory in the LLVM tree.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1368
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1369<p>If you have any questions or comments about LLVM, please feel free to contact
Bill Wendling7b7fa742011-10-26 18:46:16 +0000[diff] [blame]1370 us via the <a href="http://llvm.org/docs/#maillist"> mailing lists</a>.</p>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1371
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1372</div>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1373
1374<!-- *********************************************************************** -->
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1375
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1376<hr>
Misha Brukman2061e892003-11-22 01:23:39 +0000[diff] [blame]1377<address>
Misha Brukman38847d52003-12-21 22:53:21 +0000[diff] [blame]1378 <a href="http://jigsaw.w3.org/css-validator/check/referer"><img
Misha Brukman44408702008-12-11 17:34:48 +0000[diff] [blame]1379 src="http://jigsaw.w3.org/css-validator/images/vcss-blue" alt="Valid CSS"></a>
Misha Brukman2061e892003-11-22 01:23:39 +0000[diff] [blame]1380 <a href="http://validator.w3.org/check/referer"><img
Misha Brukman44408702008-12-11 17:34:48 +0000[diff] [blame]1381 src="http://www.w3.org/Icons/valid-html401-blue" alt="Valid HTML 4.01"></a>
Misha Brukman2061e892003-11-22 01:23:39 +0000[diff] [blame]1382
Chris Lattnerb4b0ce72007-05-18 00:44:29 +0000[diff] [blame]1383 <a href="http://llvm.org/">LLVM Compiler Infrastructure</a><br>
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1384 Last modified: $Date$
Misha Brukman2061e892003-11-22 01:23:39 +0000[diff] [blame]1385</address>
Chris Lattner79c3fe12003-10-02 04:57:28 +0000[diff] [blame]1386
Misha Brukman500bc302003-11-22 00:38:41 +0000[diff] [blame]1387</body>
1388</html>