-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
-<html><head><title>LLVM 1.1 Release Notes</title></head>
-<body bgcolor=white>
-
-<table width="100%" bgcolor="#330077" border=0 cellpadding=4 cellspacing=0>
-<tr><td> <font size=+3 color="#EEEEFF" face="Georgia,Palatino,Times,Roman"><b>LLVM 1.1 Release Notes</b></font></td>
-</tr></table>
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
+ "http://www.w3.org/TR/html4/strict.dtd">
+<html>
+<head>
+ <link rel="stylesheet" href="llvm.css" type="text/css">
+ <title>LLVM 1.1 Release Notes</title>
+</head>
+<body>
+
+<div class="doc_title">
+ LLVM 1.1 Release Notes
+</div>
<ol>
- <li><a href="#intro">Introduction</a>
- <li><a href="#whatsnew">What's New?</a>
- <li><a href="#portability">Portability and Supported Platforms</a>
- <li><a href="#install-instructions">Installation Instructions</a>
+ <li><a href="#intro">Introduction</a></li>
+ <li><a href="#whatsnew">What's New?</a></li>
+ <li><a href="#portability">Portability and Supported Platforms</a></li>
+ <li><a href="#install-instructions">Installation Instructions</a></li>
<li><a href="#knownproblems">Known Problems</a>
<ul>
<!-- <li><a href="#portabilityprobs">Portability Problems</a> -->
<li><a href="#x86-be">Known problems with the X86 Back-end</a>
<li><a href="#sparc-be">Known problems with the Sparc Back-end</a>
<li><a href="#c-be">Known problems with the C back-end</a>
- </ul>
- <li><a href="#additionalinfo">Additional Information</a>
- </ul>
-
- <p><b>Written by <a href="mailto:sabre@nondot.org">Chris Lattner</a></b><p>
+ </ul></li>
+ <li><a href="#additionalinfo">Additional Information</a></li>
</ol>
+<div class="doc_text">
+ <p><b>Written by <a href="mailto:sabre@nondot.org">Chris Lattner</a></b><p>
+</div>
<!-- *********************************************************************** -->
-<table width="100%" bgcolor="#330077" border=0 cellpadding=4 cellspacing=0>
-<tr><td align=center><font color="#EEEEFF" size=+2 face="Georgia,Palatino"><b>
-<a name="intro">Introduction
-</b></font></td></tr></table><ul>
+<div class="doc_section">
+ <a name="intro">Introduction</a>
+</div>
<!-- *********************************************************************** -->
-This document contains the release notes for the LLVM compiler infrastructure,
-release 1.1. Here we describe the status of LLVM, including any known problems,
-and bug fixes from the previous release. The most up-to-date version of this
-document can be found on the <a
+<div class="doc_text">
+
+<p>This document contains the release notes for the LLVM compiler
+infrastructure, release 1.1. Here we describe the status of LLVM, including any
+known problems, and bug fixes 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/1.1/">LLVM 1.1 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>
+this document may be updated after the release.</p>
-For more information about LLVM, including information about potentially more
+<p>For more information about LLVM, including information about potentially more
current releases, please check out the <a href="http://llvm.cs.uiuc.edu">main
web site</a>. If you have questions or comments, the <a
href="http://mail.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVM developer's mailing
-list</a> is a good place to send them.<p>
+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
+href="http://llvm.cs.uiuc.edu/releases/">releases page</a>.</p>
-Note that if you are reading this file from CVS, that this document applies to
-the <i>next</i> release, not the previous one. To see the release notes for the
-previous release, see the <a href="http://llvm.cs.uiuc.edu/releases/">releases
-page</a>.<p>
+</div>
<!-- *********************************************************************** -->
-</ul><table width="100%" bgcolor="#330077" border=0 cellpadding=4 cellspacing=0>
-<tr><td align=center><font color="#EEEEFF" size=+2 face="Georgia,Palatino"><b>
-<a name="whatsnew">What's New?
-</b></font></td></tr></table><ul>
+<div class="doc_section">
+ <a name="whatsnew">What's New?</a>
+</div>
<!-- *********************************************************************** -->
-This is the second public release of the LLVM compiler infrastructure. This
-release implements the following new features:<p>
+<div class="doc_text">
+
+<p>This is the second public release of the LLVM compiler infrastructure. This
+release is primarily a bugfix release, dramatically improving the C/C++
+front-end, and improving support for C++ in the LLVM core. This release also
+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 improves a few optimizations.</p>
+
+<p>At this time, LLVM is known to correctly compile the C & C++ SPEC CPU2000
+benchmarks (X86 only), the Olden benchmarks, and the Ptrdist benchmarks along
+with <b>many</b> other programs. LLVM now also works with a broad variety of
+C++ programs, though it has still received much less testing than the C
+front-end.
+</p>
+
+<p>
+Note that the Sparc and X86 backends do not currently support exception throwing
+or long jumping (including 253.perlbmk in SPEC). For these programs, you must
+use the C backend. Support for unwinding will be added in a future release.
+</p>
+
+
+<!--=========================================================================-->
+<div class="doc_subsubsection">
+This release implements the following new features:
+</div>
+
+<ol>
+<li><a
+href="http://mail.cs.uiuc.edu/pipermail/llvmdev/2003-November/000528.html">A new
+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>
+</ol>
+
+
+<!--=========================================================================-->
+<div class="doc_subsubsection">
+In this release, the following missing features were implemented:
+</div>
<ol>
-<li>temp</li>
-<li>temp</li>
-<li>temp</li>
-</ol><p>
+<li><a href="http://llvm.cs.uiuc.edu/PR88">The interpreter does not support
+invoke or unwind</a></li>
-In this release, the following Quality of Implementation issues were fixed:<p>
+<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>
+
+
+<!--=========================================================================-->
+<div class="doc_subsubsection">
+In this release, the following Quality of Implementation issues were
+fixed:
+</div>
<ol>
-<li><a href="http://llvm.cs.uiuc.edu/PR29">C++ front-end is not generating linkonce linkage type when it can</a></li>
-</ol><p>
-In this release, the following bugs in the previous release were fixed:<p>
+<li>The C++ front-end now compiles functions to
+ <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
+ 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>
+</ol>
+
+
+<!--=========================================================================-->
+<div class="doc_subsubsection">
+In this release, the following bugs in the previous release were fixed:
+</div>
+
+<p>Bugs in the LLVM Core:</p>
<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/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<directory> 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/PR140">gccld produces a runner script that includes command-line options to load the necessary shared objects</a></li>
+</ol>
+
+
+<p>Bugs in the C/C++ front-end:</p>
+
+<ol>
<li><a href="http://llvm.cs.uiuc.edu/PR59">C++ frontend can crash when compiling virtual base classes</a></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><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/PR64">[constmerge] Constant merging pass merges constants with external linkage</a></li>
<li><a href="http://llvm.cs.uiuc.edu/PR65">C front-end miscompiles the builtin_expect intrinsic!</a></li>
-</ol><p>
-
-At this time, LLVM is known to work properly with SPEC CPU 2000, the Olden
-benchmarks, and the Ptrdist benchmarks among many other programs. Note however
-that the Sparc and X86 backends do not currently support exception throwing or
-long jumping (including 253.perlbmk in SPEC). For these programs you must use
-the C backend.<p>
+<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 & 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>
+</div>
<!-- *********************************************************************** -->
-</ul><table width="100%" bgcolor="#330077" border=0 cellpadding=4 cellspacing=0>
-<tr><td align=center><font color="#EEEEFF" size=+2 face="Georgia,Palatino"><b>
-<a name="portability">Portability and Supported Platforms
-</b></font></td></tr></table><ul>
+<div class="doc_section">
+ <a name="portability">Portability and Supported Platforms</a>
+</div>
<!-- *********************************************************************** -->
-LLVM has only been extensively tested on Intel and AMD machines running Red
-Hat Linux, and Sun UltraSPARC workstations running Solaris 8.
+<div class="doc_text">
+
+<p>LLVM has been extensively tested on Intel and AMD machines running Red
+Hat Linux, and Sun UltraSPARC workstations running Solaris 8. Additionally,
+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).
The core LLVM infrastructure uses "autoconf" for portability, so hopefully we
-work on more platforms than that. However, it is extremely likely that we
-missed something. We welcome portability patches and error messages.<p>
+work on more platforms than that. However, it is likely that we
+missed something, and that minor porting is required to get LLVM to work on
+new platforms. We welcome portability patches and error messages.</p>
+</div>
<!-- *********************************************************************** -->
-</ul><table width="100%" bgcolor="#330077" border=0 cellpadding=4 cellspacing=0>
-<tr><td align=center><font color="#EEEEFF" size=+2 face="Georgia,Palatino"><b>
-<a name="knownproblems">Known Problems
-</b></font></td></tr></table><ul>
+<div class="doc_section">
+ <a name="knownproblems">Known Problems</a>
+</div>
<!-- *********************************************************************** -->
-This section contains all known problems with the LLVM system, listed by
+<div class="doc_text">
+
+<p>This section contains all known problems with the LLVM system, listed by
component. As new problems are discovered, they will be added to these
-sections.
+sections.</p>
+</div>
<!-- _______________________________________________________________________ -->
<!--
-->
-<!-- _______________________________________________________________________ -->
-</ul><h4><a name="core"><hr size=0>Known problems with the LLVM Core</h4><ul>
+<!-- ======================================================================= -->
+<div class="doc_subsection">
+ <a name="core">Known problems with the LLVM Core</a>
+</div>
-<li>In the JIT, <tt>dlsym</tt> on a symbol compiled by the JIT will not work.<p>
+<div class="doc_text">
+
+<ul>
+
+<li>In the JIT, <tt>dlsym</tt> on a symbol compiled by the JIT will not
+work.</li>
<li>The JIT does not use mutexes to protect its internal data structures. As
- such, execution of a threaded program could cause these data structures to
- be corrupted.<p>
+such, execution of a threaded program could cause these data structures to be
+corrupted.</li>
-<li>It is not possible to <tt>dlopen</tt> an LLVM bytecode file in the JIT.<p>
+<li>It is not possible to <tt>dlopen</tt> an LLVM bytecode file in the JIT.</li>
<li>Linking in static archive files (.a files) is very slow (there is no symbol
-table in the archive).
+table in the archive).</li>
+
+<li><a href="http://llvm.cs.uiuc.edu/PR82">LLVM cannot handle structures with
+more than 256 elements</a>.</li>
+
+</ul>
+
+</div>
+
+<!-- ======================================================================= -->
+<div class="doc_subsection">
+ <a name="c-fe">Known problems with the C front-end</a>
+</div>
<!-- _______________________________________________________________________ -->
-</ul><h4><a name="c-fe"><hr size=0>Known problems with the C front-end</h4><ul>
+<div class="doc_subsubsection">
+ Bugs
+</div>
-</ul><b>Bugs:</b><ul><p>
+<div class="doc_text">
-<li><a href="http://llvm.cs.uiuc.edu/PR6">Oversized integer bitfields cause crash</a>.<p>
+<ul>
<li>C99 Variable sized arrays do not release stack memory when they go out of
scope. Thus, the following program may run out of stack space:
int X[n];
foo(X);
}
-</pre><p>
+</pre></li>
-</ul><b>Notes:</b><ul><p>
+</ul>
-<li>Inline assembly is not yet supported.<p>
+</div>
-<li>"long double" is transformed by the front-end into "double". There is no
- support for floating point data types of any size other than 32 and 64 bits.
- <p>
+<!-- _______________________________________________________________________ -->
+<div class="doc_subsubsection">
+ Notes
+</div>
-<li>The following Unix system functionality has not been tested and may not work:
-<ol>
- <li><tt>sigsetjmp</tt>, <tt>siglongjmp</tt> - These are not turned into the
- appropriate <tt>invoke</tt>/<tt>unwind</tt> instructions. Note that
- <tt>setjmp</tt> and <tt>longjmp</tt> <em>are</em> compiled correctly.
- <li><tt>getcontext</tt>, <tt>setcontext</tt>, <tt>makecontext</tt>
- - These functions have not been tested.
-</ol><p>
+<div class="doc_text">
+
+<ul>
+
+<li>Inline assembly is not yet supported.</li>
+
+<li>"long double" is transformed by the front-end into "double". There is no
+support for floating point data types of any size other than 32 and 64
+bits.</li>
+
+<li>The following Unix system functionality has not been tested and may not
+work:
+ <ol>
+ <li><tt>sigsetjmp</tt>, <tt>siglongjmp</tt> - These are not turned into the
+ appropriate <tt>invoke</tt>/<tt>unwind</tt> instructions. Note that
+ <tt>setjmp</tt> and <tt>longjmp</tt> <em>are</em> compiled correctly.
+ <li><tt>getcontext</tt>, <tt>setcontext</tt>, <tt>makecontext</tt>
+ - These functions have not been tested.
+ </ol></li>
<li>Although many GCC extensions are supported, some are not. In particular,
the following extensions are known to <b>not be</b> supported:
<ol>
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Local-Labels.html#Local%20Labels">Local Labels</a>: Labels local to a block.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html#Labels%20as%20Values">Labels as Values</a>: Getting pointers to labels, and computed gotos.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Nested-Functions.html#Nested%20Functions">Nested Functions</a>: As in Algol and Pascal, lexical scoping of functions.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Constructing-Calls.html#Constructing%20Calls">Constructing Calls</a>: Dispatching a call to another function.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html#Extended%20Asm">Extended Asm</a>: Assembler instructions with C expressions as operands.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Constraints.html#Constraints">Constraints</a>: Constraints for asm operands
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Asm-Labels.html#Asm%20Labels">Asm Labels</a>: Specifying the assembler name to use for a C symbol.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Explicit-Reg-Vars.html#Explicit%20Reg%20Vars">Explicit Reg Vars</a>: Defining variables residing in specified registers.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Return-Address.html#Return%20Address">Return Address</a>: Getting the return or frame address of a function.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Vector-Extensions.html#Vector%20Extensions">Vector Extensions</a>: Using vector instructions through built-in functions.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Target-Builtins.html#Target%20Builtins">Target Builtins</a>: Built-in functions specific to particular targets.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Thread-Local.html#Thread-Local">Thread-Local</a>: Per-thread variables.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Pragmas.html#Pragmas">Pragmas</a>: Pragmas accepted by GCC.
- </ol><p>
-
- The following GCC extensions are <b>partially</b> supported. An ignored
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Local-Labels.html#Local%20Labels">Local Labels</a>: Labels local to a block.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html#Labels%20as%20Values">Labels as Values</a>: Getting pointers to labels, and computed gotos.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Nested-Functions.html#Nested%20Functions">Nested Functions</a>: As in Algol and Pascal, lexical scoping of functions.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Constructing-Calls.html#Constructing%20Calls">Constructing Calls</a>: Dispatching a call to another function.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html#Extended%20Asm">Extended Asm</a>: Assembler instructions with C expressions as operands.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Constraints.html#Constraints">Constraints</a>: Constraints for asm operands</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Asm-Labels.html#Asm%20Labels">Asm Labels</a>: Specifying the assembler name to use for a C symbol.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Explicit-Reg-Vars.html#Explicit%20Reg%20Vars">Explicit Reg Vars</a>: Defining variables residing in specified registers.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Return-Address.html#Return%20Address">Return Address</a>: Getting the return or frame address of a function.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Vector-Extensions.html#Vector%20Extensions">Vector Extensions</a>: Using vector instructions through built-in functions.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Target-Builtins.html#Target%20Builtins">Target Builtins</a>: Built-in functions specific to particular targets.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Thread-Local.html#Thread-Local">Thread-Local</a>: Per-thread variables.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Pragmas.html#Pragmas">Pragmas</a>: Pragmas accepted by GCC.</li>
+ </ol>
+
+ <p>The following GCC extensions are <b>partially</b> supported. An ignored
attribute means that the LLVM compiler ignores the presence of the attribute,
but the code should still work. An unsupported attribute is one which is
ignored by the LLVM compiler, which will cause a different interpretation of
- the program.<p>
+ the program.</p>
<ol>
<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Variable-Length.html#Variable%20Length">Variable Length</a>:
Arrays whose length is computed at run time.<br>
- Supported, but allocated stack space is not freed until the function returns (noted above).
+ Supported, but allocated stack space is not freed until the function returns (noted above).</li>
<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html#Function%20Attributes">Function Attributes</a>:
- Declaring that functions have no side effects, or that they can never return.<br>
- <b>Supported:</b> <tt>format</tt>, <tt>format_arg</tt>, <tt>non_null</tt>, <tt>constructor</tt>, <tt>destructor</tt>, <tt>unused</tt>, <tt>deprecated</tt>,
- <tt>warn_unused_result</tt>, <tt>weak</tt><br>
- <b>Ignored:</b> <tt>noreturn</tt>, <tt>noinline</tt>, <tt>always_inline</tt>, <tt>pure</tt>, <tt>const</tt>, <tt>nothrow</tt>, <tt>malloc</tt>
- <tt>no_instrument_function</tt>, <tt>cdecl</tt><br>
- <b>Unsupported:</b> <tt>used</tt>, <tt>section</tt>, <tt>alias</tt>, <tt>visibility</tt>, <tt>regparm</tt>, <tt>stdcall</tt>,
- <tt>fastcall</tt>, all other target specific attributes
+
+ Declaring that functions have no side effects, or that they can never
+ return.<br>
+
+ <b>Supported:</b> <tt>format</tt>, <tt>format_arg</tt>, <tt>non_null</tt>,
+ <tt>constructor</tt>, <tt>destructor</tt>, <tt>unused</tt>,
+ <tt>deprecated</tt>, <tt>warn_unused_result</tt>, <tt>weak</tt><br>
+
+ <b>Ignored:</b> <tt>noreturn</tt>, <tt>noinline</tt>,
+ <tt>always_inline</tt>, <tt>pure</tt>, <tt>const</tt>, <tt>nothrow</tt>,
+ <tt>malloc</tt>, <tt>no_instrument_function</tt>, <tt>cdecl</tt><br>
+
+ <b>Unsupported:</b> <tt>used</tt>, <tt>section</tt>, <tt>alias</tt>,
+ <tt>visibility</tt>, <tt>regparm</tt>, <tt>stdcall</tt>,
+ <tt>fastcall</tt>, all other target specific attributes</li>
<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Variable-Attributes.html#Variable%20Attributes">Variable Attributes</a>:
Specifying attributes of variables.<br>
<b>Supported:</b> <tt>cleanup</tt>, <tt>common</tt>, <tt>nocommon</tt>,
<tt>deprecated</tt>, <tt>transparent_union</tt>,
<tt>unused</tt>, <tt>weak</tt><br>
+
<b>Unsupported:</b> <tt>aligned</tt>, <tt>mode</tt>, <tt>packed</tt>,
<tt>section</tt>, <tt>shared</tt>, <tt>tls_model</tt>,
<tt>vector_size</tt>, <tt>dllimport</tt>,
- <tt>dllexport</tt>, all target specific attributes.<br>
+ <tt>dllexport</tt>, all target specific attributes.</li>
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Type-Attributes.html#Type%20Attributes">Type Attributes</a>: Specifying attributes of types.
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Type-Attributes.html#Type%20Attributes">Type Attributes</a>: Specifying attributes of types.<br>
<b>Supported:</b> <tt>transparent_union</tt>, <tt>unused</tt>,
- <tt>deprecated</tt>, <tt>may_alias</tt>
- <b>Unsupported:</b> <tt>aligned</tt>, <tt>packed</tt>
- all target specific attributes.<br>
+ <tt>deprecated</tt>, <tt>may_alias</tt><br>
+
+ <b>Unsupported:</b> <tt>aligned</tt>, <tt>packed</tt>,
+ all target specific attributes.</li>
+
<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html#Other%20Builtins">Other Builtins</a>:
Other built-in functions.<br>
We support all builtins which have a C language equivalent (e.g.,
<tt>__builtin_cos</tt>), <tt>__builtin_alloca</tt>,
<tt>__builtin_types_compatible_p</tt>, <tt>__builtin_choose_expr</tt>,
- <tt>__builtin_constant_p</tt>, and <tt>__builtin_expect</tt> (ignored).
- </ol><p>
+ <tt>__builtin_constant_p</tt>, and <tt>__builtin_expect</tt> (ignored).</li>
+ </ol>
+
+ <p>The following extensions <b>are</b> known to be supported:</p>
- The following extensions <b>are</b> known to be supported:
<ol>
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html#Statement%20Exprs">Statement Exprs</a>: Putting statements and declarations inside expressions.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Typeof.html#Typeof">Typeof</a>: <code>typeof</code>: referring to the type of an expression.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Lvalues.html#Lvalues">Lvalues</a>: Using <code>?:</code>, "<code>,</code>" and casts in lvalues.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Conditionals.html#Conditionals">Conditionals</a>: Omitting the middle operand of a <code>?:</code> expression.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Long-Long.html#Long%20Long">Long Long</a>: Double-word integers.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Complex.html#Complex">Complex</a>: Data types for complex numbers.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Hex-Floats.html#Hex%20Floats">Hex Floats</a>:Hexadecimal floating-point constants.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html#Zero%20Length">Zero Length</a>: Zero-length arrays.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Empty-Structures.html#Empty%20Structures">Empty Structures</a>: Structures with no members.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Variadic-Macros.html#Variadic%20Macros">Variadic Macros</a>: Macros with a variable number of arguments.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Escaped-Newlines.html#Escaped%20Newlines">Escaped Newlines</a>: Slightly looser rules for escaped newlines.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Subscripting.html#Subscripting">Subscripting</a>: Any array can be subscripted, even if not an lvalue.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Pointer-Arith.html#Pointer%20Arith">Pointer Arith</a>:Arithmetic on <code>void</code>-pointers and function pointers.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Initializers.html#Initializers">Initializers</a>: Non-constant initializers.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Compound-Literals.html#Compound%20Literals">Compound Literals</a>: Compound literals give structures, unions or arrays as values.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Designated-Inits.html#Designated%20Inits">Designated Inits</a>: Labeling elements of initializers.
-
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Cast-to-Union.html#Cast%20to%20Union">Cast to Union</a>:Casting to union type from any member of the union.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Case-Ranges.html#Case%20Ranges">Case Ranges</a>: `case 1 ... 9' and such.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Mixed-Declarations.html#Mixed%20Declarations">Mixed Declarations</a>: Mixing declarations and code.
-
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Function-Prototypes.html#Function%20Prototypes">Function Prototypes</a>: Prototype declarations and old-style definitions.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/C---Comments.html#C++%20Comments">C++ Comments</a>: C++ comments are recognized.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Dollar-Signs.html#Dollar%20Signs">Dollar Signs</a>: Dollar sign is allowed in identifiers.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Character-Escapes.html#Character%20Escapes">Character Escapes</a>: <code>\e</code> stands for the character <ESC>.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Alignment.html#Alignment">Alignment</a>: Inquiring about the alignment of a type or variable.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Inline.html#Inline">Inline</a>: Defining inline functions (as fast as macros).
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Alternate-Keywords.html#Alternate%20Keywords">Alternate Keywords</a>:<code>__const__</code>, <code>__asm__</code>, etc., for header files.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Incomplete-Enums.html#Incomplete%20Enums">Incomplete Enums</a>: <code>enum foo;</code>, with details to follow.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Function-Names.html#Function%20Names">Function Names</a>: Printable strings which are the name of the current function.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Unnamed-Fields.html#Unnamed%20Fields">Unnamed Fields</a>: Unnamed struct/union fields within structs/unions.
- <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Attribute-Syntax.html#Attribute%20Syntax">Attribute Syntax</a>: Formal syntax for attributes.
- </ol><p>
-
- If you run into GCC extensions which have not been included in any of these
- lists, please let us know (also including whether or not they work).
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html#Statement%20Exprs">Statement Exprs</a>: Putting statements and declarations inside expressions.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Typeof.html#Typeof">Typeof</a>: <code>typeof</code>: referring to the type of an expression.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Lvalues.html#Lvalues">Lvalues</a>: Using <code>?:</code>, "<code>,</code>" and casts in lvalues.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Conditionals.html#Conditionals">Conditionals</a>: Omitting the middle operand of a <code>?:</code> expression.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Long-Long.html#Long%20Long">Long Long</a>: Double-word integers.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Complex.html#Complex">Complex</a>: Data types for complex numbers.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Hex-Floats.html#Hex%20Floats">Hex Floats</a>:Hexadecimal floating-point constants.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html#Zero%20Length">Zero Length</a>: Zero-length arrays.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Empty-Structures.html#Empty%20Structures">Empty Structures</a>: Structures with no members.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Variadic-Macros.html#Variadic%20Macros">Variadic Macros</a>: Macros with a variable number of arguments.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Escaped-Newlines.html#Escaped%20Newlines">Escaped Newlines</a>: Slightly looser rules for escaped newlines.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Subscripting.html#Subscripting">Subscripting</a>: Any array can be subscripted, even if not an lvalue.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Pointer-Arith.html#Pointer%20Arith">Pointer Arith</a>: Arithmetic on <code>void</code>-pointers and function pointers.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Initializers.html#Initializers">Initializers</a>: Non-constant initializers.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Compound-Literals.html#Compound%20Literals">Compound Literals</a>: Compound literals give structures, unions or arrays as values.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Designated-Inits.html#Designated%20Inits">Designated Inits</a>: Labeling elements of initializers.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Cast-to-Union.html#Cast%20to%20Union">Cast to Union</a>: Casting to union type from any member of the union.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Case-Ranges.html#Case%20Ranges">Case Ranges</a>: `case 1 ... 9' and such.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Mixed-Declarations.html#Mixed%20Declarations">Mixed Declarations</a>: Mixing declarations and code.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Function-Prototypes.html#Function%20Prototypes">Function Prototypes</a>: Prototype declarations and old-style definitions.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/C---Comments.html#C++%20Comments">C++ Comments</a>: C++ comments are recognized.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Dollar-Signs.html#Dollar%20Signs">Dollar Signs</a>: Dollar sign is allowed in identifiers.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Character-Escapes.html#Character%20Escapes">Character Escapes</a>: <code>\e</code> stands for the character <ESC>.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Alignment.html#Alignment">Alignment</a>: Inquiring about the alignment of a type or variable.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Inline.html#Inline">Inline</a>: Defining inline functions (as fast as macros).</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Alternate-Keywords.html#Alternate%20Keywords">Alternate Keywords</a>:<code>__const__</code>, <code>__asm__</code>, etc., for header files.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Incomplete-Enums.html#Incomplete%20Enums">Incomplete Enums</a>: <code>enum foo;</code>, with details to follow.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Function-Names.html#Function%20Names">Function Names</a>: Printable strings which are the name of the current function.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Unnamed-Fields.html#Unnamed%20Fields">Unnamed Fields</a>: Unnamed struct/union fields within structs/unions.</li>
+ <li><a href="http://gcc.gnu.org/onlinedocs/gcc/Attribute-Syntax.html#Attribute%20Syntax">Attribute Syntax</a>: Formal syntax for attributes.</li>
+ </ol></li>
+</ul>
-<!-- _______________________________________________________________________ -->
-</ul><h4><a name="c++-fe"><hr size=0>Known problems with the C++ front-end</h4><ul>
+<p>If you run into GCC extensions which have not been included in any of these
+lists, please let us know (also including whether or not they work).</p>
-For this release, the C++ front-end is considered to be fully functional but
-of <b>beta</b> quality. It has been tested and works for a number of simple programs that collectively exercise most of the language. Nevertheless, it has not been in use as long as the C front-end. Please report any bugs or problems.<p>
+</div>
+
+<!-- ======================================================================= -->
+<div class="doc_subsection">
+ <a name="c++-fe">Known problems with the C++ front-end</a>
+</div>
+
+<div class="doc_text">
+
+<p>For this release, the C++ front-end is considered to be fully functional, but
+has not been tested as thoroughly as the C front-end. It has been tested and
+works for a number of non-trivial programs, but there may be lurking bugs.
+Please report any bugs or problems.</p>
+
+</div>
+
+<!-- _______________________________________________________________________ -->
+<div class="doc_subsubsection">
+ Bugs
+</div>
-</ul><b>Bugs</b>:<ul><p>
+<div class="doc_text">
+<ul>
<li>The C++ front-end inherits all problems afflicting the <a href="#c-fe">C
- front-end</a><p>
+ front-end</a></li>
+</ul>
+
+</div>
+
+<!-- _______________________________________________________________________ -->
+<div class="doc_subsubsection">
+ Notes
+</div>
-</ul><b>Notes</b>:<ul><p>
+<div class="doc_text">
+
+<ul>
<li>The C++ front-end is based on a pre-release of the GCC 3.4 C++ parser. This
parser is significantly more standards compliant (and picky) than prior GCC
versions. For more information, see the C++ section of the <a
-href="http://gcc.gnu.org/gcc-3.4/changes.html">GCC 3.4 release notes</a>.<p>
+href="http://gcc.gnu.org/gcc-3.4/changes.html">GCC 3.4 release notes</a>.</li>
<li>Destructors for local objects are not always run when a <tt>longjmp</tt> is
performed. In particular, destructors for objects in the <tt>longjmp</tt>ing
function and in the <tt>setjmp</tt> receiver function may not be run.
Objects in intervening stack frames will be destroyed however (which is
- better than most compilers).<p>
+ better than most compilers).</li>
<li>The LLVM C++ front-end follows the <a
href="http://www.codesourcery.com/cxx-abi">Itanium C++ ABI</a>.
Itanium ABI C++ compilers (such as G++, the Intel and HP compilers, etc).
<i>However</i>, the exception handling mechanism used by LLVM is very
different from the model used in the Itanium ABI, so <b>exceptions will not
- interact correctly</b> .
+ interact correctly</b>. </li>
-<li><a href="http://llvm.cs.uiuc.edu/PR11">Code for executing destructors when
- unwinding is not shared</a> (this is a quality of implementation problem,
- which does not effect functionality).<p>
+</ul>
+</div>
-<!-- _______________________________________________________________________ -->
-</ul><h4><a name="x86-be"><hr size=0>Known problems with the X86 back-end</h4><ul>
+<!-- ======================================================================= -->
+<div class="doc_subsection">
+ <a name="x86-be">Known problems with the X86 back-end</a>
+</div>
+
+<div class="doc_text">
+
+<ul>
<li>The X86 code generator <a
href="http://llvm.cs.uiuc.edu/PR16">does not currently
support the <tt>unwind</tt> instruction</a>, so code that throws a C++ exception
-or calls the C <tt>longjmp</tt> function will abort.<p>
+or calls the C <tt>longjmp</tt> function will abort.</li>
+
+</ul>
+</div>
-<!-- _______________________________________________________________________ -->
-</ul><h4><a name="sparc-be"><hr size=0>Known problems with the Sparc back-end</h4><ul>
+<!-- ======================================================================= -->
+<div class="doc_subsection">
+ <a name="sparc-be">Known problems with the Sparc back-end</a>
+</div>
+
+<div class="doc_text">
+
+<ul>
<li>The Sparc code generator <a
href="http://llvm.cs.uiuc.edu/PR15">does not currently
support the <tt>unwind</tt> instruction</a>, so code that throws a C++ exception
-or calls the C <tt>longjmp</tt> function will abort.<p>
+or calls the C <tt>longjmp</tt> function will abort.</li>
+</ul>
-<!-- _______________________________________________________________________ -->
-</ul><h4><a name="c-be"><hr size=0>Known problems with the C back-end</h4><ul>
+</div>
+
+<!-- ======================================================================= -->
+<div class="doc_subsection">
+ <a name="c-be">Known problems with the C back-end</a>
+</div>
+
+<div class="doc_text">
+
+<ul>
<li>The C back-end produces code that violates the ANSI C Type-Based Alias
Analysis rules. As such, special options may be necessary to compile the code
(for example, GCC requires the <tt>-fno-strict-aliasing</tt> option). This
-problem probably cannot be fixed.<p>
+problem probably cannot be fixed.</li>
<li><a href="http://llvm.cs.uiuc.edu/PR33">Initializers for global variables</a>
-cannot include special floating point numbers like Not-A-Number or Infinity.<p>
+cannot include special floating point numbers like Not-A-Number or
+Infinity.</li>
-<li><a href="http://zion.cs.uiuc.edu/PR56">Zero arg vararg functions are not
+<li><a href="http://llvm.cs.uiuc.edu/PR56">Zero arg vararg functions are not
supported</a>. This should not affect LLVM produced by the C or C++
-frontends.<p>
-
-<li>The code produces by the C back-end has only been tested with the Sun CC and
-GCC compilers. It is possible that it will have to be adjusted to support other
-C compilers.<p>
+frontends.</li>
+</ul>
+</div>
<!-- *********************************************************************** -->
-</ul><table width="100%" bgcolor="#330077" border=0 cellpadding=4 cellspacing=0>
-<tr><td align=center><font color="#EEEEFF" size=+2 face="Georgia,Palatino"><b>
-<a name="additionalinfo">Additional Information
-</b></font></td></tr></table><ul>
+<div class="doc_section">
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can access versions of these documents specific to this release by going into
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+the "<tt>llvm/doc/</tt>" directory in the LLVM tree.</p>
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projects / oota-llvm.git / blobdiff