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- <title>LLVM 1.4 Release Notes</title>
+ <title>LLVM 1.5 Release Notes</title>
</head>
<body>
-<div class="doc_title">LLVM 1.4 Release Notes</div>
+<div class="doc_title">LLVM 1.5 Release Notes</div>
<ol>
<li><a href="#intro">Introduction</a></li>
</ol>
<div class="doc_author">
- <p>Written by the <a href="http://llvm.cs.uiuc.edu">LLVM
team</a><p>
+ <p>Written by the <a href="http://llvm.cs.uiuc.edu">LLVM
Team</a><p>
</div>
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<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
+infrastructure, release 1.5. Here we describe the status of LLVM, including any
known problems and improvements 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
+href="http://llvm.cs.uiuc.edu/releases/1.5/">LLVM 1.5 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>
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
+<p>Note that if you are reading this file from CVS 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 the current or previous releases, see the <a
href="http://llvm.cs.uiuc.edu/releases/">releases page</a>.</p>
</div>
<div class="doc_text">
-<p>This is the fifth public release of the LLVM compiler infrastructure.</p>
+<p>This is the sixth public release of the LLVM compiler infrastructure.</p>
-<p> At this time, LLVM is known to correctly compile on a broad range of
-C and C++ programs, including the SPEC CPU95 & 2000 suite. This release
-includes several major enhancements to the LLVM system, including a new
-PowerPC JIT, enhancements to the C/C++ front-end to provide source line number
-information in LLVM, a new <a href="CommandGuide/html/llvmc.html">compiler
-driver</a>, and several other enhancements listed below. It also includes
-bug fixes for those problems found since the 1.3 release.</p>
-
-<p>Note that this release seperates the LLVM Program Testsuite out of the
-main LLVM distribution into a seperate CVS repository and tarball. This
-reduces the size of the main LLVM distribution. Also note that LLVM now
-builds tools into llvm/Debug/bin by default instead of llvm/tools/Debug.</p>
+<p> At this time, LLVM is known to correctly compile on a broad range of C and
+C++ programs, including the SPEC CPU95 & 2000 suite. TODO. It also includes
+bug fixes for those problems found since the 1.4 release.</p>
</div>
<div class="doc_text">
<ol>
- <li>LLVM now includes a Just-In-Time compiler for the PowerPC target.</li>
- <li>llvmgcc and llvmg++ now emit source line number information when '-g' is
- passed in, making it possible to map from LLVM code back to source.
- This information is currently used by llvm-db and can be used with other
- tools and passes.</li>
- <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 repository and
- tarball. This shrinks the distribution size of LLVM itself significantly.
- </li>
- <li>LLVM now optimizes global variables more aggressively 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>Bytecode compression with bzip2 has been implemented. All bytecode files
- generated by LLVM will now be compressed by default. Compression can be
- disabled with the <tt>-disable-compression</tt> option to the tools that can
- generate bytecode files.
- </li>
- <li>A generic <a href="CommandGuide/html/llvmc.html">compiler driver</a>
- (llvmc) and
- an associated <a href="CommandGuide/html/llvm-ld.html">generic linker</a>
- (llvm-ld) have been added. The compiler driver is generic because it can be
- configured
- to pre-process, translate, optimize, assemble, and link code from any source
- language with an LLVM front-end. This makes it easier for compiler writers
- to hide the multiple steps required to compile a program (compiling,
- optimizing, linking runtime libraries, etc) in one simple command.
- </li>
- <li>The <a href="http://llvm.cs.uiuc.edu/PR263">dependent libraries</a>
- feature has been implemented. This allows front end compilers to indicate in
- the bytecode which libraries the bytecode needs to be linked with. Both the
- C/C++ and Stacker front ends support generating the required dependencies.
- The linker now supports using this information to ensure required libaries are
- linked into the module. This minimizes the need to use the <tt>-l</tt> option
- when using <a href="CommandGuide/html/llvmc.html"><tt>llvmc</tt></a>.
- </li>
- <li>The LLVM makefiles have been improved to build LLVM much faster and
- includes new targets (like dist-check, uninstall). One important user-visible
- change is that 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>The JIT-Target interfaces <a href="http://llvm.cs.uiuc.edu/PR283">are
- now much simpler</a> and more powerful.
- </li>
- <li>LLVM now provides llvm-ar and llvm-ranlib tools for working with archives
- of LLVM bytecode files.</li>
- <li>zlib and libpng are <a href="http://llvm.cs.uiuc.edu/PR417">no longer
- included in the main LLVM tarball</a>.</li>
- <li>The LLVM code generator now automatically generates assembly code writers
- from an abstract target descriptions, eliminating the need to write
- assembly printers manually.</li>
- <li>LLVM regression and feature tests now use DejaGNU instead of QMTest.</li>
+ <li></li>
</ol>
</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="CommandGuide/html/llvm-ar.html">llvm-ar</a> for
- details.
- </li>
+ <li></li>
</ol>
</div>
<div class="doc_text">
<ol>
- <li>The linker no longer <a href="http://llvm.cs.uiuc.edu/PR426">emits many
- useless warnings</a> when linking C++ programs.
- </li>
- <li>The LLVM <a href="http://llvm.cs.uiuc.edu/PR352">#include namespace</a>
- has been made consistent. Files in <tt>llvm/include/{Support,Config}</tt>
- are now located in <tt>llvm/include/llvm/{Support,Config}</tt>.
- </li>
- <li>The names of the libraries generated by compiling LLVM source have been
- changed to ensure they do not conflict with other packages upon installation.
- Each LLVM library is now prefixed with LLVM and uses mixed clase. For example,
- the library <tt>libasmparser.a</tt> in 1.3 has become
- <tt>libLLVMAsmParser.a</tt> in release 1.4.
- </li>
- <li>The C++ frontend no longer expands and emits <a
- href="http://llvm.cs.uiuc.edu/PR459">all inline functions, even if they
- are unused</a>. It now properly tracks which functions are needed and
- only compiles those.</li>
-
- <li>Many improvements in the <a href="http://llvm.cs.uiuc.edu/PR256">autoconf
- and makefile systems</a> have been implemented.</li>
+ <li></li>
</ol>
</div>
<div class="doc_text">
<ol>
- <li>The optimizer produces <a href="http://llvm.cs.uiuc.edu/PR362">more
- efficient code for std::min/std::max</a> and other similar functions.</li>
- <li>The X86 backend generates substantially faster code for floating point
- intensive programs.</li>
- <li>The PowerPC backend generates more efficient code in many common
- scenarios.</li>
+ <li></li>
</ol>
</div>
<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>
- <li><a href="http://llvm.cs.uiuc.edu/PR472">[cbackend] Static globals are
- prototyped as 'extern'</a></li>
+ <li></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>
- <li><a href="http://llvm.cs.uiuc.edu/PR461">[llvmgcc] Crash compiling unnamed
- bitfield which does not increase struct size</a></li>
- <li><a href="http://llvm.cs.uiuc.edu/PR424">[llvmgcc] llvmgcc emits invalid
- constant exprs</a></li>
- <li><a href="http://llvm.cs.uiuc.edu/PR421">[llvmg++] Crash initializing
- array with constructors in hard EH situations</a></li>
- <li><a href="http://llvm.cs.uiuc.edu/PR397">[llvm-gcc] Inline function
- redefinitions error due to 'asm' function rename</a></li>
- <li><a href="http://llvm.cs.uiuc.edu/PR244">[llvm-gcc] Error when an
- implicitly external function is re-declared as static</a></li>
- <li><a href="http://llvm.cs.uiuc.edu/PR360">[llvmgcc] Structure field with
- non-constant offset crashes llvmgcc</a></li>
- <li><a href="http://llvm.cs.uiuc.edu/PR447">[llvmg++] Crash compiling
- friend with default argument</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>
+ <li></li>
</ol>
</div>
porting may be required to get LLVM to work on new platforms. We welcome your
portability patches and reports of successful builds or error messages.</p>
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</div>
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