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Rev the release notes to 1.2
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10459 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner
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<html>
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<head>
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<link rel="stylesheet" href="llvm.css" type="text/css">
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<title>LLVM 1.1 Release Notes</title>
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<title>LLVM 1.2 Release Notes</title>
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</head>
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<body>
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<div class="doc_title">
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LLVM 1.1 Release Notes
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LLVM 1.2 Release Notes
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</div>
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<ol>
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@ -42,10 +42,10 @@
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<div class="doc_text">
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<p>This document contains the release notes for the LLVM compiler
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infrastructure, release 1.1. Here we describe the status of LLVM, including any
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infrastructure, release 1.2. Here we describe the status of LLVM, including any
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known problems, and bug fixes from the previous release. The most up-to-date
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version of this document can be found on the <a
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href="http://llvm.cs.uiuc.edu/releases/1.1/">LLVM 1.1 web site</a>. If you are
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href="http://llvm.cs.uiuc.edu/releases/1.2/">LLVM 1.2 web site</a>. If you are
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not reading this on the LLVM web pages, you should probably go there, because
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this document may be updated after the release.</p>
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@ -70,12 +70,9 @@ href="http://llvm.cs.uiuc.edu/releases/">releases page</a>.</p>
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<div class="doc_text">
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<p>This is the second public release of the LLVM compiler infrastructure. This
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release is primarily a bugfix release, dramatically improving the C/C++
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front-end, and improving support for C++ in the LLVM core. This release also
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includes a few new features, such as a simple profiler, support for Mac OS/X,
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better interoperability with external source bases, a new example language
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front-end, and improvements in a few optimizations.</p>
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<p>This is the third public release of the LLVM compiler infrastructure. OTHER
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OVERVIEW STUFF HERE.
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</p>
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<p>At this time, LLVM is known to correctly compile and run all non-unwinding C
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& C++ SPEC CPU2000 benchmarks, the Olden benchmarks, and the Ptrdist
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@ -100,58 +97,8 @@ This release implements the following new features:
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</div>
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<ol>
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<li><a
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href="http://mail.cs.uiuc.edu/pipermail/llvmdev/2003-November/000528.html">A new
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LLVM profiler, similar to gprof</a> is available</li>
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<li>LLVM and the C/C++ front-end now compile on Mac OS/X! Mac OS/X users can
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now explore the LLVM optimizer with the C backend and interpreter. Note that
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LLVM requires GCC 3.3 on Mac OS/X.</li>
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<li>LLVM has been <a
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href="http://mail.cs.uiuc.edu/pipermail/llvmdev/2003-November/000554.html">moved
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into an 'llvm' C++ namespace</a>, for easier integration with third-party
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code. Note that due to lack of namespace support in GDB 5.x, you will probably
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want to upgrade to GDB 6 or better to debug LLVM code.</li>
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<li>
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The build system now copies Makefiles dynamically from the source tree to the
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object tree as subdirectories are built. This means that:
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<ol>
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<li>
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New directories can be added to the source tree, and the build will
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automatically pick them up (i.e. no need to re-run <tt>configure</tt>).
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</li>
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<li>
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You will need to build LLVM from the top of the object tree once to ensure
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that all of the Makefiles are copied into the object tree subdirectories.
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</li>
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</ol>
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</li>
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<li>A front-end for "Stacker" (a simple Forth-like language) is now
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<a href="http://llvm.cs.uiuc.edu/PR136">included in the main LLVM tree</a>.
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Additionally, Reid Spencer, the author, contributed a document <a href="Stacker.html">describing his experiences writing Stacker, and the language itself</a>. This document is invaluable for others writing front-ends targetting LLVM.</li>
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<li>The <tt>configure</tt> script will now configure all projects placed in the
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<tt>llvm/projects</tt> directory.</li>
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<li>The <tt>-tailcallelim</tt> pass can now introduce "accumulator" variables
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to transform functions in many common cases that it could not before.</li>
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<li>The <tt>-licm</tt> pass can now sink instructions out the bottom of loops
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in addition to being able to hoist them out the top.</li>
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<li>The <tt>-basicaa</tt> pass (the default alias analysis) has been upgraded
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to be <a href="http://llvm.cs.uiuc.edu/PR86">significantly more
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precise</a>.</li>
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<li>LLVM 1.1 implements a simple size optimization for LLVM bytecode files.
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This means that the 1.1 files are smaller than 1.0, but that 1.0 won't
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read 1.1 bytecode files.</li>
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<li><a href="http://llvm.cs.uiuc.edu/PR140">The gccld program produces a runner script that includes command-line options to load the necessary shared objects.</a></li>
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<li></li>
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<li></li>
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</ol>
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@ -161,17 +108,8 @@ In this release, the following missing features were implemented:
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</div>
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<ol>
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<li><a href="http://llvm.cs.uiuc.edu/PR88">The interpreter does not support
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invoke or unwind</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR99">Interpreter does not support the
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<tt>vaarg</tt> instruction</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR117">llvm-nm cannot read archive
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files</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR146">Interpreter does not handle
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setne constant expression</a></li>
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<li></li>
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<li></li>
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</ol>
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@ -183,37 +121,9 @@ fixed:
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<ol>
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<li>The C++ front-end now compiles functions to
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<a href="http://llvm.cs.uiuc.edu/PR29">use the linkonce linkage type</a>
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more, giving the optimizer more freedom.</a></li>
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<li></li>
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<li>The C front-end now <a href="http://llvm.cs.uiuc.edu/PR84">generates
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type-safe code</a> in several cases that it did not before, which prevented
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some important optimizations.</li>
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<li>The LLVM build system has been taught to catch some common configuration
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problems that <a href="http://llvm.cs.uiuc.edu/PR96">caused it to get
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horribly confused</a> before.</li>
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<li>The LLVM header files are now
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<a href="http://llvm.cs.uiuc.edu/PR114">-Wold-style-cast clean</a>.</li>
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<li>The LLVM bytecode reader has been <a
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href="http://llvm.cs.uiuc.edu/PR127">sped up a lot</a> (up to 4x in some
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cases).</li>
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<li>In C++, methods and functions in anonymous namespaces <a href="http://llvm.cs.uiuc.edu/PR85">now get internal linkage</a>.</li>
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<li>Constant initializers now generate loops instead of potentially <a href="http://llvm.cs.uiuc.edu/PR75">huge amounts of straight-line code</a>.</li>
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<li>Code for running C++ destructors is now properly shared when possible. Before, the C++ front-end
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<a href="http://llvm.cs.uiuc.edu/PR11">generated N^2 amounts of duplicated cleanup code</a> in some cases.</li>
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<li>The JIT used to <a href="http://llvm.cs.uiuc.edu/PR177">generate code for
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all functions pointed to by globals</a> immediately, before the program
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started execution, but now it waits until the first time they are called to
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compile them. This dramatically speeds up short runs of large C++ programs,
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which often have large numbers of functions pointed to by vtables.</li>
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<li></li>
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</ol>
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@ -225,70 +135,16 @@ In this release, the following bugs in the previous release were fixed:
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<p>Bugs in the LLVM Core:</p>
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<ol>
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<li><a href="http://llvm.cs.uiuc.edu/PR57">[inliner] Inlining invoke with PHI in unwind target is broken</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR58">[linker] linkonce globals should link successfully to external globals</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR64">[constmerge] Constant merging pass merges constants with external linkage</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR66">[scalarrepl] Scalar Replacement of aggregates is decimating structures it shouldn't be</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR70">[instcombine] Resolving invoke inserts cast after terminator</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR71">llvm-as crashes when labels are used in phi nodes</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR72">[build problem] Callgraph.cpp not pulled in from libipa.a</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR77">Variables in scope of output setjmp
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calls should be volatile</a> (Note that this does not effect correctness on
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many platforms, such as X86).</li>
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<li><a href="http://llvm.cs.uiuc.edu/PR83">[X86] Emission of global bool initializers broken</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR91">[gccld] The -r (relinking) option does not work correctly</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR92">[bcreader] Cannot read shift constant expressions from bytecode file</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR93">[lowersetjmp] Lowersetjmp pass breaks dominance properties!</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR95">SymbolTable::getUniqueName is very inefficient</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR97">bugpoint must not pass -R<directory> to Mach-O linker</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR98">[buildscripts] Building into objdir with .o in it fails</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR101">[setjmp/longjmp] Linking C programs which use setjmp/longjmp sometimes fail with references to the C++ runtime library!</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR107">AsmParser Misses Symbol Redefinition Error</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR108">gccld -Lfoo -lfoo fails to find ./foo/libfoo.a</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR110">[bcreader] Incorrect cast causes misread forward constant references</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR116">[adce] ADCE considers blocks without postdominators to be unreachable</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR123">[X86] div and rem constant exprs invalidate iterators!</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR130">[vmcore] Symbol table doesn't rename colliding variables during type resolution</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR138">Archive reader does not understand 4.4BSD/Mac OS X long filenames</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR30">[llvm-ar] Command line arguments have funny syntax</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR179">[licm] LICM promotes volatile memory locations to registers</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/PR59">C++ frontend can crash when compiling virtual base classes</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR62">C backend fails on constant cast expr to ptr-to-anonymous struct</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR63">#ident is not recognized by C frontend</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR65">C front-end miscompiles the builtin_expect intrinsic!</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR67">1.0 precompiled libstdc++ does not include wchar_t support</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR68">llvmgcc asserts when compiling functions renamed with asm's</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR69">C frontend crashes on some programs with lots of types.</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR79">llvm-gcc crashes compiling global union initializer</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR80">C front-end crash on empty structure</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR81">CFrontend crashes when compiling C99 compound expressions</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR87">llvm-gcc infinite loops on "case MAXINT:"</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR89">[C++] Catch blocks make unparsable labels</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR90">[C++] Initializing array with constructable objects fail</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR94">llvm-gcc tries to add bools</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR104">[c++] C++ Frontend lays out superclasses like anonymous bitfields!</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR54">C front-end miscompiles unsigned enums whose LLVM types are signed</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR112">Casting a string constant to void crashes llvm-gcc</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR125">[llvmg++] Enum types are incorrectly shrunk to smaller than 'int' size</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR128">[llvmg++] Cannot use pointer to member to initialize global</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR131">[llvm-gcc] ?: operator as lvalue not implemented</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR133">[C/C++] Bogus warning about taking the address of 'register' variable</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR113">crash assigning into an array in a struct which contains a bitfield</a>.</li>
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<li><a href="http://llvm.cs.uiuc.edu/PR6">Oversized integer bitfields cause crash</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR141">[llvm-gcc] Bitfields & large array don't mix well</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR132">[llvm-gcc] Complex division is not supported</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR143">[llvm-gcc] Illegal union field reference</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR148">[llvmg++] Front-end attempts to return structure by value</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR152">[llvmg++] Pointer to member initializers not supported in constructors</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR155">[llvm-gcc] crash on union initialization</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR124">[llvm-g++] ?: expressions do not run correct number of destructors!</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR157">[llvm-gcc] Pointer & constant results in invalid shift</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR165">[llvmg++] call through array of pointers to member functions causes assertion</a></li>
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<li></li>
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<li></li>
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</ol>
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</div>
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@ -302,7 +158,7 @@ many platforms, such as X86).</li>
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<div class="doc_text">
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<p>LLVM has been extensively tested on Intel and AMD machines running Red
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Hat Linux and has been tested on Sun UltraSPARC workstations running Solaris 8.
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Hat Linux and FreeBSD. It has also been tested on Sun UltraSPARC workstations running Solaris 8.
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Additionally,
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LLVM works on Mac OS/X 10.3 and above, but only with the C backend or
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interpreter (no native backend for the PowerPC is available yet).
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@ -369,9 +225,7 @@ more than 256 elements</a>.</li>
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</div>
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<!-- _______________________________________________________________________ -->
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<div class="doc_subsubsection">
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Bugs
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</div>
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<div class="doc_subsubsection">Bugs</div>
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<div class="doc_text">
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