docs/ReleaseNotes-2.6.html


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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
                      "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <link rel="stylesheet" href="llvm.css" type="text/css">
  <title>LLVM 2.6 Release Notes</title>
</head>
<body>

<div class="doc_title">LLVM 2.6 Release Notes</div>

<ol>
  <li><a href="#intro">Introduction</a></li>
  <li><a href="#subproj">Sub-project Status Update</a></li>
  <li><a href="#externalproj">External Projects Using LLVM 2.6</a></li>
  <li><a href="#whatsnew">What's New in LLVM 2.6?</a></li>
  <li><a href="GettingStarted.html">Installation Instructions</a></li>
  <li><a href="#portability">Portability and Supported Platforms</a></li>
  <li><a href="#knownproblems">Known Problems</a></li>
  <li><a href="#additionalinfo">Additional Information</a></li>
</ol>

<div class="doc_author">
  <p>Written by the <a href="http://llvm.org">LLVM Team</a></p>
</div>

<!-- *********************************************************************** -->
<div class="doc_section">
  <a name="intro">Introduction</a>
</div>
<!-- *********************************************************************** -->

<div class="doc_text">

<p>This document contains the release notes for the LLVM Compiler
Infrastructure, release 2.6.  Here we describe the status of LLVM, including
major improvements from the previous release and significant known problems.
All LLVM releases may be downloaded from the <a
href="http://llvm.org/releases/">LLVM releases web site</a>.</p>

<p>For more information about LLVM, including information about the latest
release, please check out the <a href="http://llvm.org/">main LLVM
web site</a>.  If you have questions or comments, the <a
href="http://mail.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVM Developer's Mailing
List</a> is a good place to send them.</p>

<p>Note that if you are reading this file from a Subversion checkout or the
main LLVM web page, this document applies to the <i>next</i> release, not the
current one.  To see the release notes for a specific release, please see the
<a href="http://llvm.org/releases/">releases page</a>.</p>

</div>
 

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  include/llvm/Analysis/LiveValues.h => Dan
  lib/Transforms/IPO/MergeFunctions.cpp => consider for 2.8.
  llvm/Analysis/PointerTracking.h => Edwin wants this, consider for 2.8.
-->
 
   
<!-- Unfinished features in 2.6:
  gcc plugin.
  strong phi elim
  variable debug info for optimized code
  postalloc scheduler: anti dependence breaking, hazard recognizer?
  metadata
  loop dependence analysis
  ELF Writer?  How stable?
  <li>PostRA scheduler improvements, ARM adoption (David Goodwin).</li>

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 Logo web page.
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 compiler_rt
 klee web page at klee.llvm.org
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   Mention gcc plugin.

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<!-- *********************************************************************** -->
<div class="doc_section">
  <a name="subproj">Sub-project Status Update</a>
</div>
<!-- *********************************************************************** -->

<div class="doc_text">
<p>
The LLVM 2.6 distribution currently consists of code from the core LLVM
repository &mdash;which roughly includes the LLVM optimizers, code generators
and supporting tools &mdash; and the llvm-gcc repository.  In addition to this
code, the LLVM Project includes other sub-projects that are in development.  The
two which are the most actively developed are the <a href="#clang">Clang
Project</a> and the <a href="#vmkit">VMKit Project</a>.
</p>

</div>


<!--=========================================================================-->
<div class="doc_subsection">
<a name="clang">Clang: C/C++/Objective-C Frontend Toolkit</a>
</div>

<div class="doc_text">

<p>The <a href="http://clang.llvm.org/">Clang project</a> is an effort to build
a set of new 'LLVM native' front-end technologies for the C family of languages.
LLVM 2.6 is the first release to officially include Clang, and it provides a
production quality C and Objective-C compiler.  If you are interested in fast
compiles and good diagnostics, we encourage you to try it out.</p>

<p>In addition to supporting these languages, C++ support is also <a
href="http://clang.llvm.org/cxx_status.html">well under way</a>, and mainline
Clang is able to parse the libstdc++ 4.2 headers and even codegen simple apps.
If you are interested in Clang C++ support or any other Clang feature, we
strongly encourage you to get involved on the <a 
href="http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev">Clang front-end mailing
list</a>.</p>

<p>In the LLVM 2.6 time-frame, the Clang team has made many improvements:</p>

<ul>
<li>C and Objective-C support are now considered production quality.</li>
<li>AuroraUX / FreeBSD &amp; OpenBSD Toolchain support.</li>
<li>Most of Objective-C 2.0 is now supported with the GNU runtime.</li>
<li>Many many bugs are fixed and many features have been added.</li>
</ul>
</div>

<!--=========================================================================-->
<div class=