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Substantial improvements and cleanups for the release notes. We were missing

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a bunch of stuff!  :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11822 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2004-02-25 16:36:51 +00:00
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@ -69,20 +69,28 @@ href="http://llvm.cs.uiuc.edu/releases/">releases page</a>.</p>
<div class="doc_text">
<p>This is the third public release of the LLVM compiler infrastructure.
<p>
This is the third public release of the LLVM compiler infrastructure. This
release incorporates several <a href="#newfeatures">new features</a> (including
exception handling support for the native code generators, the start of a
source-level debugger, and profile guided optimizer components), many <a
href="#qualityofimp">speedups</a> and <a href="#codequality">code quality</a>
improvements, documentation improvements, and a small collection of important <a
href="bugfix">bug fixes</a>. Overall, this is our highest quality release to
date, and we encourage you to upgrade if you are using LLVM 1.0 or 1.1.
</p>
<p>At this time, LLVM is known to correctly compile and run all C
<p><B> FIXME: UPDATE: </b>
At this time, LLVM is known to correctly compile and run all C
&amp; C++ SPEC CPU2000 benchmarks, the Olden benchmarks, and the Ptrdist
benchmarks. It has also been used to compile <b>many</b> other programs. LLVM
now also works with a broad variety of C++ programs, though it has still
received less testing than the C front-end.
</p>
<!--=========================================================================-->
<div class="doc_subsubsection">
This release implements the following new features:
<a name="newfeatures">This release implements the following new features:</a>
</div>
<ol>
@ -90,8 +98,23 @@ This release implements the following new features:
<li>LLVM 1.2 encodes bytecode files for large programs in 10-30% less space.</li>
<li>LLVM can now feed profile information back into optimizers for Profile Guided Optimization, and includes a simple basic block reordering pass.</li>
<li>The LLVM JIT lazily initializes global variables, reducing startup time for programs with lots of globals (like C++ programs).</li>
<li>The build and installation infrastructure in this release is dramatically
improved. There is now an <a
href="http://llvm.cs.uiuc.edu/PR105"><tt>autoconf/AutoRegen.sh</tt> script</a>
that you can run to rebuild the <tt>configure</tt> script and its associated
files as well as beta support for "<a
href="http://llvm.cs.uiuc.edu/PR208">make</a> <a
href="http://llvm.cs.uiuc.edu/PR220">install</a>" and <a
href="http://llvm.cs.uiuc.edu/PR203">RPM package generation</a>.</li>
<li>The "tblgen" tool is <a href="TableGenFundamentals.html">now documented</a>.</li>
<li>The LLVM code generator can now fold spill code into instructions on targets
that support it.</li>
<li><a href="http://llvm.cs.uiuc.edu/PR253">LLVM now no longer depends on the boost library</a>.</li>
<li>The X86 backend now generates <b>substantially</b> better native code, and is faster.</li>
<li>The C backend has been turned moved from the "llvm-dis" tool to the "llc"
tool. You can activate it with "<tt>llc -march=c foo.bc -o foo.c</tt>".</li>
</ol>
@ -110,7 +133,7 @@ In this release, the following missing features were implemented:
<!--=========================================================================-->
<div class="doc_subsubsection">
In this release, the following Quality of Implementation issues were fixed:
<a name="qualityofimp">In this release, the following Quality of Implementation issues were fixed:</a>
</div>
<ol>
@ -123,20 +146,13 @@ In this release, the following Quality of Implementation issues were fixed:
<li><a href="http://llvm.cs.uiuc.edu/PR209">[loadvn/inline/scalarrepl] Slow optimizations with extremely large basic blocks</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR224">[asmparser] Really slow parsing of types with complex upreferences</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR205">[llvmgcc] C front-end does not emit 'zeroinitializer' when possible</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR233">[llvmgcc] Structure copies result in a LOT of code</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR239">LLVM is now much more memory efficient when handling large zero initialized arrays</a></li>
</ol>
<!--=========================================================================-->
<div class="doc_subsubsection">
LLVM gained several improvements to its build and installation
infrastructure in this release. There is now
a <tt>autoconf/AutoRegen.sh</tt> script that you can run to rebuild the
<tt>configure</tt> script and its associated files
(<a href="http://llvm.cs.uiuc.edu/PR105">Bug 105</a>) as well as beta support
for "make install" (<a href="http://llvm.cs.uiuc.edu/PR208">Bug 208</a> and
<a href="http://llvm.cs.uiuc.edu/PR220">Bug 220</a>) and RPM package generation
(<a href="http://llvm.cs.uiuc.edu/PR203">Bug 203</a>).
Additionally, in this release, the following build problems were fixed:
In this release, the following build problems were fixed:
</div>
<ol>
@ -147,20 +163,22 @@ Additionally, in this release, the following build problems were fixed:
<!--=========================================================================-->
<div class="doc_subsubsection">
In this release, the following Code Quality issues were fixed:
<a name="codequality">In this release, the following Code Quality issues were fixed:</a>
</div>
<ol>
<li><a href="http://llvm.cs.uiuc.edu/PR187">[loopsimplify] Many pointless phi nodes are created</a></li>
<li>The X86 backend didn't generate <tt>fchs</tt> to negate floating point numbers</li>
<li>The X86 backend didn't expand memcpy() into the <tt>rep movs</tt> instruction</li>
<li><a href="http://llvm.cs.uiuc.edu/PR237">[x86] wierd stack/frame pointer manipulation</a></li>
<li>The X86 backend now generate <tt>fchs</tt> to negate floating point numbers,
compiles memcpy() into the <tt>rep movs</tt> instruction, and makes much better
use of powerful addressing modes and instructions.</li>
</ol>
<!--=========================================================================-->
<div class="doc_subsubsection">
In this release, the following bugs in the previous release were fixed:
<a name="bugfix">In this release, the following bugs in the previous release were fixed:</a>
</div>
<p>Bugs in the LLVM Core:</p>
@ -197,7 +215,6 @@ management functions in libc runtime to allow them to be overriden</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR204">[llvmg++] Dynamically initialized constants cannot be marked 'constant'</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR216">[llvmgcc] floating-point unary minus is incorrect for +0.0</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR221">[llvm-gcc] miscompilation of 'X = Y = Z' with aggregate values</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR233">[llvmgcc] Structure copies result in a LOT of code</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR244">[llvm-gcc] miscompilation when a function is re-declared as static</a></li>
</ol>