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Rev the release notes to 1.2 

llvm-svn: 10459
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Chris Lattner 2003-12-14 05:03:43 +00:00
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@ -3,12 +3,12 @@
<html> <html>
<head> <head>
<link rel="stylesheet" href="llvm.css" type="text/css"> <link rel="stylesheet" href="llvm.css" type="text/css">
<title>LLVM 1.1 Release Notes</title> <title>LLVM 1.2 Release Notes</title>
</head> </head>
<body> <body>
<div class="doc_title"> <div class="doc_title">
LLVM 1.1 Release Notes LLVM 1.2 Release Notes
</div> </div>
<ol> <ol>
@ -42,10 +42,10 @@
<div class="doc_text"> <div class="doc_text">
<p>This document contains the release notes for the LLVM compiler <p>This document contains the release notes for the LLVM compiler
infrastructure, release 1.1. Here we describe the status of LLVM, including any infrastructure, release 1.2. Here we describe the status of LLVM, including any
known problems, and bug fixes from the previous release. The most up-to-date known problems, and bug fixes from the previous release. The most up-to-date
version of this document can be found on the <a version of this document can be found on the <a
href="http://llvm.cs.uiuc.edu/releases/1.1/">LLVM 1.1 web site</a>. If you are href="http://llvm.cs.uiuc.edu/releases/1.2/">LLVM 1.2 web site</a>. If you are
not reading this on the LLVM web pages, you should probably go there, because not reading this on the LLVM web pages, you should probably go there, because
this document may be updated after the release.</p> this document may be updated after the release.</p>
@ -70,12 +70,9 @@ href="http://llvm.cs.uiuc.edu/releases/">releases page</a>.</p>
<div class="doc_text"> <div class="doc_text">
<p>This is the second public release of the LLVM compiler infrastructure. This <p>This is the third public release of the LLVM compiler infrastructure. OTHER
release is primarily a bugfix release, dramatically improving the C/C++ OVERVIEW STUFF HERE.
front-end, and improving support for C++ in the LLVM core. This release also </p>
includes a few new features, such as a simple profiler, support for Mac OS/X,
better interoperability with external source bases, a new example language
front-end, and improvements in a few optimizations.</p>
<p>At this time, LLVM is known to correctly compile and run all non-unwinding C <p>At this time, LLVM is known to correctly compile and run all non-unwinding C
&amp; C++ SPEC CPU2000 benchmarks, the Olden benchmarks, and the Ptrdist &amp; C++ SPEC CPU2000 benchmarks, the Olden benchmarks, and the Ptrdist
@ -100,58 +97,8 @@ This release implements the following new features:
</div> </div>
<ol> <ol>
<li><a <li></li>
href="http://mail.cs.uiuc.edu/pipermail/llvmdev/2003-November/000528.html">A new <li></li>
LLVM profiler, similar to gprof</a> is available</li>
<li>LLVM and the C/C++ front-end now compile on Mac OS/X! Mac OS/X users can
now explore the LLVM optimizer with the C backend and interpreter. Note that
LLVM requires GCC 3.3 on Mac OS/X.</li>
<li>LLVM has been <a
href="http://mail.cs.uiuc.edu/pipermail/llvmdev/2003-November/000554.html">moved
into an 'llvm' C++ namespace</a>, for easier integration with third-party
code. Note that due to lack of namespace support in GDB 5.x, you will probably
want to upgrade to GDB 6 or better to debug LLVM code.</li>
<li>
The build system now copies Makefiles dynamically from the source tree to the
object tree as subdirectories are built. This means that:
<ol>
<li>
New directories can be added to the source tree, and the build will
automatically pick them up (i.e. no need to re-run <tt>configure</tt>).
</li>
<li>
You will need to build LLVM from the top of the object tree once to ensure
that all of the Makefiles are copied into the object tree subdirectories.
</li>
</ol>
</li>
<li>A front-end for "Stacker" (a simple Forth-like language) is now
<a href="http://llvm.cs.uiuc.edu/PR136">included in the main LLVM tree</a>.
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>
<li>The <tt>configure</tt> script will now configure all projects placed in the
<tt>llvm/projects</tt> directory.</li>
<li>The <tt>-tailcallelim</tt> pass can now introduce "accumulator" variables
to transform functions in many common cases that it could not before.</li>
<li>The <tt>-licm</tt> pass can now sink instructions out the bottom of loops
in addition to being able to hoist them out the top.</li>
<li>The <tt>-basicaa</tt> pass (the default alias analysis) has been upgraded
to be <a href="http://llvm.cs.uiuc.edu/PR86">significantly more
precise</a>.</li>
<li>LLVM 1.1 implements a simple size optimization for LLVM bytecode files.
This means that the 1.1 files are smaller than 1.0, but that 1.0 won't
read 1.1 bytecode files.</li>
<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>
</ol> </ol>
@ -161,17 +108,8 @@ In this release, the following missing features were implemented:
</div> </div>
<ol> <ol>
<li><a href="http://llvm.cs.uiuc.edu/PR88">The interpreter does not support <li></li>
invoke or unwind</a></li> <li></li>
<li><a href="http://llvm.cs.uiuc.edu/PR99">Interpreter does not support the
<tt>vaarg</tt> instruction</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR117">llvm-nm cannot read archive
files</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR146">Interpreter does not handle
setne constant expression</a></li>
</ol> </ol>
@ -183,37 +121,9 @@ fixed:
<ol> <ol>
<li>The C++ front-end now compiles functions to <li></li>
<a href="http://llvm.cs.uiuc.edu/PR29">use the linkonce linkage type</a>
more, giving the optimizer more freedom.</a></li>
<li>The C front-end now <a href="http://llvm.cs.uiuc.edu/PR84">generates <li></li>
type-safe code</a> in several cases that it did not before, which prevented
some important optimizations.</li>
<li>The LLVM build system has been taught to catch some common configuration
problems that <a href="http://llvm.cs.uiuc.edu/PR96">caused it to get
horribly confused</a> before.</li>
<li>The LLVM header files are now
<a href="http://llvm.cs.uiuc.edu/PR114">-Wold-style-cast clean</a>.</li>
<li>The LLVM bytecode reader has been <a
href="http://llvm.cs.uiuc.edu/PR127">sped up a lot</a> (up to 4x in some
cases).</li>
<li>In C++, methods and functions in anonymous namespaces <a href="http://llvm.cs.uiuc.edu/PR85">now get internal linkage</a>.</li>
<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>
<li>Code for running C++ destructors is now properly shared when possible. Before, the C++ front-end
<a href="http://llvm.cs.uiuc.edu/PR11">generated N^2 amounts of duplicated cleanup code</a> in some cases.</li>
<li>The JIT used to <a href="http://llvm.cs.uiuc.edu/PR177">generate code for
all functions pointed to by globals</a> immediately, before the program
started execution, but now it waits until the first time they are called to
compile them. This dramatically speeds up short runs of large C++ programs,
which often have large numbers of functions pointed to by vtables.</li>
</ol> </ol>
@ -225,70 +135,16 @@ In this release, the following bugs in the previous release were fixed:
<p>Bugs in the LLVM Core:</p> <p>Bugs in the LLVM Core:</p>
<ol> <ol>
<li><a href="http://llvm.cs.uiuc.edu/PR57">[inliner] Inlining invoke with PHI in unwind target is broken</a></li> <li><a href="http://llvm.cs.uiuc.edu/PR179">[licm] LICM promotes volatile memory locations to registers</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR58">[linker] linkonce globals should link successfully to external globals</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR64">[constmerge] Constant merging pass merges constants with external linkage</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR66">[scalarrepl] Scalar Replacement of aggregates is decimating structures it shouldn't be</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR70">[instcombine] Resolving invoke inserts cast after terminator</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR71">llvm-as crashes when labels are used in phi nodes</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR72">[build problem] Callgraph.cpp not pulled in from libipa.a</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR77">Variables in scope of output setjmp
calls should be volatile</a> (Note that this does not effect correctness on
many platforms, such as X86).</li>
<li><a href="http://llvm.cs.uiuc.edu/PR83">[X86] Emission of global bool initializers broken</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR91">[gccld] The -r (relinking) option does not work correctly</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR92">[bcreader] Cannot read shift constant expressions from bytecode file</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR93">[lowersetjmp] Lowersetjmp pass breaks dominance properties!</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR95">SymbolTable::getUniqueName is very inefficient</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR97">bugpoint must not pass -R&lt;directory&gt; to Mach-O linker</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR98">[buildscripts] Building into objdir with .o in it fails</a></li>
<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>
<li><a href="http://llvm.cs.uiuc.edu/PR107">AsmParser Misses Symbol Redefinition Error</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR108">gccld -Lfoo -lfoo fails to find ./foo/libfoo.a</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR110">[bcreader] Incorrect cast causes misread forward constant references</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR116">[adce] ADCE considers blocks without postdominators to be unreachable</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR123">[X86] div and rem constant exprs invalidate iterators!</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR130">[vmcore] Symbol table doesn't rename colliding variables during type resolution</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR138">Archive reader does not understand 4.4BSD/Mac OS X long filenames</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR30">[llvm-ar] Command line arguments have funny syntax</a></li>
</ol> </ol>
<p>Bugs in the C/C++ front-end:</p> <p>Bugs in the C/C++ front-end:</p>
<ol> <ol>
<li><a href="http://llvm.cs.uiuc.edu/PR59">C++ frontend can crash when compiling virtual base classes</a></li> <li></li>
<li><a href="http://llvm.cs.uiuc.edu/PR62">C backend fails on constant cast expr to ptr-to-anonymous struct</a></li> <li></li>
<li><a href="http://llvm.cs.uiuc.edu/PR63">#ident is not recognized by C frontend</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR65">C front-end miscompiles the builtin_expect intrinsic!</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR67">1.0 precompiled libstdc++ does not include wchar_t support</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR68">llvmgcc asserts when compiling functions renamed with asm's</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR69">C frontend crashes on some programs with lots of types.</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR79">llvm-gcc crashes compiling global union initializer</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR80">C front-end crash on empty structure</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR81">CFrontend crashes when compiling C99 compound expressions</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR87">llvm-gcc infinite loops on "case MAXINT:"</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR89">[C++] Catch blocks make unparsable labels</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR90">[C++] Initializing array with constructable objects fail</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR94">llvm-gcc tries to add bools</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR104">[c++] C++ Frontend lays out superclasses like anonymous bitfields!</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR54">C front-end miscompiles unsigned enums whose LLVM types are signed</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR112">Casting a string constant to void crashes llvm-gcc</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR125">[llvmg++] Enum types are incorrectly shrunk to smaller than 'int' size</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR128">[llvmg++] Cannot use pointer to member to initialize global</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR131">[llvm-gcc] ?: operator as lvalue not implemented</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR133">[C/C++] Bogus warning about taking the address of 'register' variable</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR113">crash assigning into an array in a struct which contains a bitfield</a>.</li>
<li><a href="http://llvm.cs.uiuc.edu/PR6">Oversized integer bitfields cause crash</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR141">[llvm-gcc] Bitfields &amp; large array don't mix well</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR132">[llvm-gcc] Complex division is not supported</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR143">[llvm-gcc] Illegal union field reference</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR148">[llvmg++] Front-end attempts to return structure by value</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR152">[llvmg++] Pointer to member initializers not supported in constructors</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR155">[llvm-gcc] crash on union initialization</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR124">[llvm-g++] ?: expressions do not run correct number of destructors!</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR157">[llvm-gcc] Pointer & constant results in invalid shift</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR165">[llvmg++] call through array of pointers to member functions causes assertion</a></li>
</ol> </ol>
</div> </div>
@ -302,7 +158,7 @@ many platforms, such as X86).</li>
<div class="doc_text"> <div class="doc_text">
<p>LLVM has been extensively tested on Intel and AMD machines running Red <p>LLVM has been extensively tested on Intel and AMD machines running Red
Hat Linux and has been tested on Sun UltraSPARC workstations running Solaris 8. Hat Linux and FreeBSD. It has also been tested on Sun UltraSPARC workstations running Solaris 8.
Additionally, Additionally,
LLVM works on Mac OS/X 10.3 and above, but only with the C backend or LLVM works on Mac OS/X 10.3 and above, but only with the C backend or
interpreter (no native backend for the PowerPC is available yet). interpreter (no native backend for the PowerPC is available yet).
@ -369,9 +225,7 @@ more than 256 elements</a>.</li>
</div> </div>
<!-- _______________________________________________________________________ --> <!-- _______________________________________________________________________ -->
<div class="doc_subsubsection"> <div class="doc_subsubsection">Bugs</div>
Bugs
</div>
<div class="doc_text"> <div class="doc_text">