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* Add features I implemented this release.
* Wrap long lines at 80 cols * Indent lists so structure of document is a little more clear * Make the page HTML 4.01 Strict compliant. llvm-svn: 18258
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Reid Spencer
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@ -85,34 +85,60 @@ benchmarks, and <b>many</b> other C and C++ programs.</p>
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</div>
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<div class="doc_text">
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<ol>
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<li>The test/Programs hierarchy <a href="http://llvm.cs.uiuc.edu/PR257">has
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been moved out of the main LLVM tree</a> into a separate CVS repo and
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tarball. This shrinks the distribution size of LLVM itself dramatically.
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<li>LLVM now optimizes global variables significantly more than it did
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before.
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</li>
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<li>LLVM now optimizes global variables significantly more than it did
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before.</li>
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<li>LLVM now includes the new '<tt>undef</tt>' value and <a
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href="LangRef.html#i_unreachable"><tt>unreachable</tt></a> instruction,
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which give the optimizer more information about the behavior of the
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program.</li>
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<li>The LLVM makefiles have been improved to build LLVM much faster (2x) and
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includes new targets (like dist-check, uninstall). One important change is
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associated with <a href="http://llvm.cs.uiuc.edu/PR456>PR456">PR456</a>.
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The libraries and tools will now be built into
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<tt>$builddir/Debug/{bin,lib}</tt> instead of
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<tt>$builddir/tools/Debug</tt> and <tt>$builddir/lib/Debug</tt>. Similarly
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for <tt>Release</tt> and <tt>Profile</tt> builds.
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<li>LLVM now includes the new '<tt>undef</tt>' value and
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<a href="LangRef.html#i_unreachable"><tt>unreachable</tt></a> instruction,
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which give the optimizer more information about the behavior of the
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program.
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</li>
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<li>llvmgcc and llvmg++ now emit source line number information when '-g' is
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passed in. This information can be used with llvm-db or other tools and
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passes.
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</li>
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<li>The test/Programs hierarchy <a href="http://llvm.cs.uiuc.edu/PR257">has
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been moved out of the main LLVM tree</a> into a separate CVS repository and
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tarball. This shrinks the distribution size of LLVM itself significantly.
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</li>
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<li>Bytecode compression with bzip2 has been implemented. All bytecode files
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generated by LLVM will now be compressed by default. Compression can be
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disabled with the <tt>-disable-compression</tt> option to the tools that can
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generate bytecode files.
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</li>
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<li>A generic <a href="http://llvm.cs.uiuc.edu/PR353">compiler driver</a> and
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an associated <a href="CommandGuide/html/llvm-ld.html">generic linker</a> have
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been implemented. The compiler driver is generic because it can be configured
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to pre-process, translate, optimize, assemble, and link code from any source
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language. This aids compiler writers because all that is needed is a
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source-to-bytecode or source-to-assembly translator and a configuration file.
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The linker is generic because it allows dynamically loadable optimization
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modules to be executed for link-time optimization. Language specific
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link-time optimization modules can be created and executed automatically.
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</li>
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<li>The <a href="http://llvm.cs.uiuc.edu/PR263">dependent libraries</a>
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feature has been implemented. This allows front end compilers to indicate in
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the bytecode which libraries the bytecode needs to be linked with. Both the
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C/C++ front end and Stacker support generating the required libraries. The
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Linker now supports using this information to ensure required libaries are
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linked into the module. This minimizes the need to use the <tt>-l</tt> option
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when using <a href="CommandGuide/html/llvmc.html"><tt>llvmc</tt></a>
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</li>
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<li>The LLVM makefiles have been improved to build LLVM faster (2x) and
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includes new targets (like dist-check, uninstall). One important change is
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associated with <a href="http://llvm.cs.uiuc.edu/PR456">PR456</a>. The
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libraries and tools will now be built into <tt>$builddir/Debug/{bin,lib}</tt>
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instead of <tt>$builddir/tools/Debug</tt> and <tt>$builddir/lib/Debug</tt>.
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Similarly for <tt>Release</tt> and <tt>Profile</tt> builds.
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</li>
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<li>The LLVM source code is much more compatible with Microsoft Visual C++,
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including the JIT and runtime-code generation, though the entire system
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may not work with it.</li>
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<li>llvmgcc and llvmg++ now emit source line number information when '-g' is
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passed in. This information can be used with llvm-db or other tools and
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passes.</li>
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including the JIT and runtime-code generation, though the entire system
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may not work with it.
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</li>
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<li>The target-to-JIT interfaces <a href="http://llvm.cs.uiuc.edu/PR283">are
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now much simpler</a> and more powerful.</li>
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now much simpler</a> and more powerful.
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</li>
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</ol>
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</div>
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@ -127,14 +153,15 @@ In this release, the following missing features were implemented:
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<ol>
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<li><a href="http://llvm.cs.uiuc.edu/PR419">JIT interface should support
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arbitrary calls</a></li>
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arbitrary calls</a>
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</li>
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<li>The <tt>llvm-ar</tt> tool was previously incomplete and didn't properly
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support other ar(1) implementations. This has been corrected. <tt>llvm-ar</tt>
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now fully supports all archive editing functions, table of contents listing,
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extraction, and printing. It can also read BSD4.4/MacOSX and SVR4 style
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archives. See <a
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href="http://llvm.cs.uiuc.edu/docs/CommandGuide/html/llvm-ar.html">llvm-ar</a>
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for details.</li>
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archives. See <a href="CommandGuide/html/llvm-ar.html">llvm-ar</a> for
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details.
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</li>
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</ol>
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</div>
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@ -148,15 +175,18 @@ issues were fixed:</a>
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<div class="doc_text">
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<ol>
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<li><a href="http://llvm.cs.uiuc.edu/PR426">[llvmg++] Tons of warnings are spewed when
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linking to libstdc++</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR352">include/{Support,Config} ->
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include/llvm/{Support,Config}</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR426">[llvmg++] Tons of warnings
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are spewed when linking to libstdc++</a>
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</li>
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<li><a href="http://llvm.cs.uiuc.edu/PR352">include/{Support,Config} ->
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include/llvm/{Support,Config}</a>
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</li>
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<li>The names of the libraries generated by compiling LLVM source have been
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changed to ensure they do not conflict with other packages upon installation.
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Each LLVM library is now prefixed with LLVM and uses mixed clase. For example,
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the library <tt>libasmparser.a</tt> in 1.3 has become
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<tt>libLLVMAsmParser.a</tt> in release 1.4.</li>
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<tt>libLLVMAsmParser.a</tt> in release 1.4.
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</li>
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</ol>
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</div>
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@ -170,7 +200,8 @@ In this release, the following build problems were fixed:
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<ol>
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<li><a href="http://llvm.cs.uiuc.edu/PR256">[autoconf] further standardizing
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autoconf usage</a>. Various improvements in the configure.ac script were
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made as well as the makefile system.</li>
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made as well as the makefile system.
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</li>
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</ol>
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</div>
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@ -182,8 +213,9 @@ improvements:</a>
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<div class="doc_text">
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<ol>
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<li><a href="http://llvm.cs.uiuc.edu/PR362">Ugly code generated for
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std::min/std::max</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR362">Ugly code generated for
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std::min/std::max</a>
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</li>
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</ol>
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</div>
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@ -198,32 +230,33 @@ were fixed:</a>
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<p>Bugs fixed in the LLVM Core:</p>
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<ol>
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<li><a href="http://llvm.cs.uiuc.edu/PR420">[licm] LICM invalidates alias analysis info
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and uses broken information</a> (optimizer crash)</li>
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<li><a href="http://llvm.cs.uiuc.edu/PR422">[asmwriter] Asmwriter is really slow for
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functions with lots of values</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR423">[anders-aa] Andersen's AA is completely
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broken in LLVM 1.3</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR430">[bcwriter] Empty compaction tables
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defined</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR227">[X86] llc output for functions w/certain
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names tickles GNU 'as' bugs</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR420">[licm] LICM invalidates alias
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analysis info and uses broken information</a> (optimizer crash)</li>
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<li><a href="http://llvm.cs.uiuc.edu/PR422">[asmwriter] Asmwriter is really
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slow for functions with lots of values</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR423">[anders-aa] Andersen's AA is
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completely broken in LLVM 1.3</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR430">[bcwriter] Empty compaction
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tables defined</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR227">[X86] llc output for functions
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w/certain names tickles GNU 'as' bugs</a></li>
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</ol>
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<p>Bugs in the C/C++ front-end:</p>
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<ol>
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<li><a href="http://llvm.cs.uiuc.edu/PR445">[llvmg++] not enough templates are instantiated</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR450">[llvmg++] Extern const globals cannot be
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marked 'constant' if they have nontrivial ctors or dtors</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR461">[llvmgcc] Crash compiling unnamed
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<li><a href="http://llvm.cs.uiuc.edu/PR445">[llvmg++] not enough templates are
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instantiated</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR450">[llvmg++] Extern const globals
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cannot be marked 'constant' if they have nontrivial ctors or dtors</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR461">[llvmgcc] Crash compiling unnamed
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bitfield which does not increase struct size</a></li>
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</ol>
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<p>Bugs fixed in the Sparc V9 back-end:</p>
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<ol>
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<li><a href="http://llvm.cs.uiuc.edu/PR428">[sparcv9] regalloc assertion
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<li><a href="http://llvm.cs.uiuc.edu/PR428">[sparcv9] regalloc assertion
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failure with certain indirect calls</a></li>
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</ol>
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@ -311,24 +344,24 @@ components, please contact us on the llvmdev list.</p>
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<div class="doc_text">
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<ul>
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<li>In the JIT, <tt>dlsym</tt> on a symbol compiled by the JIT will not
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work.</li>
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<li>The JIT does not use mutexes to protect its internal data structures. As
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such, execution of a threaded program could cause these data structures to be
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corrupted.</li>
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<li>Linking in static archive files (.a files) is slow (there is no symbol
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table in the archive).</li>
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<li>The gccld program <a href="http://llvm.cs.uiuc.edu/PR139">does not link
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objects/archives in the order specified on the command line.</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR240">The lower-invoke pass does not mark
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values live across a setjmp as volatile</a>. This missing feature only affects
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targets whose setjmp/longjmp libraries do not save and restore the entire
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register file.</li>
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<li>In the JIT, <tt>dlsym</tt> on a symbol compiled by the JIT will not work.
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</li>
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<li>The JIT does not use mutexes to protect its internal data structures. As
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such, execution of a threaded program could cause these data structures to be
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corrupted.
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</li>
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<li>Linking in static archive files (.a files) is slow by default because
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there is no symbol table in the archive. To remedy this, run
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<a href="CommandGuide/html/llvm-ranlib.html"><tt>llvm-ranlib</tt></a> on the
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archive to add an LLVM symbol table.
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</li>
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<li>The gccld program <a href="http://llvm.cs.uiuc.edu/PR139">does not link
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objects/archives in the order specified on the command line.</a>
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</li>
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<li><a href="http://llvm.cs.uiuc.edu/PR240">The lower-invoke pass does not
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mark values live across a setjmp as volatile</a>. This missing feature
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only affects targets whose setjmp/longjmp libraries do not save and restore
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the entire register file.</li>
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</ul>
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</div>
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