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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 1.4 Release Notes</title>
</head>
<body>
<div class="doc_title">LLVM 1.4 Release Notes</div>
<ol>
<li><a href="#intro">Introduction</a></li>
<li><a href="#whatsnew">What's New?</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>
<ul>
<li><a href="#experimental">Experimental features included in this
release</a>
<li><a href="#core">Known problems with the LLVM Core</a>
<li><a href="#c-fe">Known problems with the C Front-end</a>
<li><a href="#c++-fe">Known problems with the C++ Front-end</a>
<li><a href="#x86-be">Known problems with the X86 Back-end</a>
<li><a href="#sparcv9-be">Known problems with the SparcV9 Back-end</a>
<li><a href="#ppc-be">Known problems with the PowerPC Back-end</a>
<li><a href="#c-be">Known problems with the C back-end</a>
</ul></li>
<li><a href="#additionalinfo">Additional Information</a></li>
</ol>
<div class="doc_author">
<p>Written by the <a href="http://llvm.cs.uiuc.edu">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 1.4. Here we describe the status of LLVM, including any
known problems and bug fixes from the previous release. The most up-to-date
version of this document can be found on the <a
href="http://llvm.cs.uiuc.edu/releases/1.4/">LLVM 1.4 web site</a>. If you are
not reading this on the LLVM web pages, you should probably go there because
this document may be updated after the release.</p>
<p>For more information about LLVM, including information about potentially more
current releases, please check out the <a href="http://llvm.cs.uiuc.edu">main
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 CVS, this document applies
to the <i>next</i> release, not the current one. To see the release notes for
the current or previous releases, see the <a
href="http://llvm.cs.uiuc.edu/releases/">releases page</a>.</p>
</div>
<!-- *********************************************************************** -->
<div class="doc_section">
<a name="whatsnew">What's New?</a>
</div>
<!-- *********************************************************************** -->
<div class="doc_text">
<p>This is the fifth public release of the LLVM compiler infrastructure.</p>
<p> At this time, LLVM is known to correctly compile and run all C & C++
SPEC CPU95 & 2000 benchmarks, the Olden benchmarks, and the Ptrdist
benchmarks, and <b>many</b> other C and C++ programs.</p>
</div>
<!--=========================================================================-->
<div class="doc_subsubsection">
<a name="newfeatures">This release implements the following new features:</a>
</div>
<div class="doc_text">
<ol>
<li>The test/Programs hierarchy <a href="http://llvm.cs.uiuc.edu/PR257">has
been moved out of the main LLVM tree</a> into a separate CVS repo and
tarball. This shrinks the distribution size of LLVM itself dramatically.
</li>
<li>LLVM now optimizes global variables significantly more than it did
before.</li>
<li>LLVM now includes the new '<tt>undef</tt>' value and <a
href="LangRef.html#i_unreachable"><tt>unreachable</tt></a> instruction,
which give the optimizer more information about the behavior of the
program.</li>
<li>The LLVM makefiles have been improved to build LLVM much faster (2x) and
includes new targets (like dist-check, uninstall). One important change is
associated with <a href="http://llvm.cs.uiuc.edu/PR456>PR456">PR456</a>.
The libraries and tools will now be built into
<tt>$builddir/Debug/{bin,lib}</tt> instead of
<tt>$builddir/tools/Debug</tt> and <tt>$builddir/lib/Debug</tt>. Similarly
for <tt>Release</tt> and <tt>Profile</tt> builds.
</li>
<li>The LLVM source code is much more compatible with Microsoft Visual C++,
including the JIT and runtime-code generation, though the entire system
may not work with it.</li>
<li>llvmgcc and llvmg++ now emit source line number information when '-g' is
passed in. This information can be used with llvm-db or other tools and
passes.</li>
</ol>
</div>
<!--=========================================================================-->
<div class="doc_subsubsection">
In this release, the following missing features were implemented:
</div>
<div class="doc_text">
<ol>
<li><a href="http://llvm.cs.uiuc.edu/PR419">JIT interface should support
arbitrary calls</a></li>
<li>The <tt>llvm-ar</tt> tool was previously incomplete and didn't properly
support other ar(1) implementations. This has been corrected. <tt>llvm-ar</tt>
now fully supports all archive editing functions, table of contents listing,
extraction, and printing. It can also read BSD4.4/MacOSX and SVR4 style
archives. See <a
href="http://llvm.cs.uiuc.edu/docs/CommandGuide/html/llvm-ar.html">llvm-ar</a>
for details.</li>
</ol>
</div>
<!--=========================================================================-->
<div class="doc_subsubsection">
<a name="qualityofimp">In this release, the following Quality of Implementation
issues were fixed:</a>
</div>
<div class="doc_text">
<ol>
<li><a href="http://llvm.cs.uiuc.edu/PR426">[llvmg++] Tons of warnings are spewed when
linking to libstdc++</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR352">include/{Support,Config} ->
include/llvm/{Support,Config}</a></li>
</ol>
</div>
<!--=========================================================================-->
<div class="doc_subsubsection">
In this release, the following build problems were fixed:
</div>
<div class="doc_text">
<ol>
<li></li>
</ol>
</div>
<!--=========================================================================-->
<div class="doc_subsubsection">
<a name="codequality">This release includes the following Code Quality
improvements:</a>
</div>
<div class="doc_text">
<ol>
<li><a href="http://llvm.cs.uiuc.edu/PR362">Ugly code generated for
std::min/std::max</a></li>
</ol>
</div>
<!--=========================================================================-->
<div class="doc_subsubsection">
<a name="bugfix">In this release, the following bugs in the previous release
were fixed:</a>
</div>
<div class="doc_text">
<p>Bugs fixed in the LLVM Core:</p>
<ol>
<li><a href="http://llvm.cs.uiuc.edu/PR420">[licm] LICM invalidates alias analysis info
and uses broken information</a> (optimizer crash)</li>
<li><a href="http://llvm.cs.uiuc.edu/PR422">[asmwriter] Asmwriter is really slow for
functions with lots of values</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR423">[anders-aa] Andersen's AA is completely
broken in LLVM 1.3</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR430">[bcwriter] Empty compaction tables
defined</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR227">[X86] llc output for functions w/certain
names tickles GNU 'as' bugs</a></li>
</ol>
<p>Bugs in the C/C++ front-end:</p>
<ol>
<li><a href="http://llvm.cs.uiuc.edu/PR445">[llvmg++] not enough templates are instantiated</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR450">[llvmg++] Extern const globals cannot be
marked 'constant' if they have nontrivial ctors or dtors</a></li>
</ol>
<p>Bugs fixed in the Sparc V9 back-end:</p>
<ol>
<li><a href="http://llvm.cs.uiuc.edu/PR428">[sparcv9] regalloc assertion
failure with certain indirect calls</a></li>
</ol>
</div>
<!-- *********************************************************************** -->
<div class="doc_section">
<a name="portability">Portability and Supported Platforms</a>
</div>
<!-- *********************************************************************** -->
<div class="doc_text">
<p>LLVM is known to work in the following platforms:</p>
<ul>
<li>Intel and AMD machines running Red Hat Linux and FreeBSD (and probably
other unix-like systems).</li>
<li>Sun UltraSPARC workstations running Solaris 8.</li>
|
