"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
+ <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link rel="stylesheet" href="llvm.css" type="text/css">
- <title>LLVM 1.3 Release Notes</title>
+ <title>LLVM 1.4 Release Notes</title>
</head>
<body>
-<div class="doc_title">LLVM 1.3 Release Notes</div>
+<div class="doc_title">LLVM 1.4 Release Notes</div>
<ol>
<li><a href="#intro">Introduction</a></li>
<li><a href="#c-fe">Known problems with the C Front-end</a>
<li><a href="#c++-fe">Known problems with the C++ Front-end</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="#sparcv9-be">Known problems with the SparcV9 Back-end</a>
+ <li><a href="#ppc-be">Known problems with the PowerPC Back-end</a>
<li><a href="#c-be">Known problems with the C back-end</a>
</ul></li>
<li><a href="#additionalinfo">Additional Information</a></li>
<div class="doc_text">
<p>This document contains the release notes for the LLVM compiler
-infrastructure, release 1.3. Here we describe the status of LLVM, including any
+infrastructure, release 1.4. 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/1.3/">LLVM 1.3 web site</a>. If you are
+href="http://llvm.cs.uiuc.edu/releases/1.4/">LLVM 1.4 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>
<div class="doc_text">
-<p>This is the fourth public release of the LLVM compiler infrastructure. This
-release primarily improves the <a href="#codequality">performance of the
-code</a> produced by all aspects of the LLVM compiler and adds some <a
-href="#newfeatures">new features</a>, though it does <a href="#bugfix">fix a few
-bugs</a> as well.</p>
+<p>This is the fifth public release of the LLVM compiler infrastructure.</p>
<p> At this time, LLVM is known to correctly compile and run all C & 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>
+SPEC CPU95 & 2000 benchmarks, the Olden benchmarks, and the Ptrdist
+benchmarks, and <b>many</b> other C and C++ programs.</p>
</div>
</div>
<div class="doc_text">
-
<ol>
-<li>The LLVM <a href="LangRef.html#i_select"><tt>select</tt></a> instruction is
-now fully implemented and supported by all transformations, native code
-generators, and the interpreter.</li>
-<li>Bugpoint can now narrow down code-generation bugs to a loop nest, where
-before it could only narrow them down to a function being miscompiled.</li>
-<li><a href="http://llvm.cs.uiuc.edu/PR40">Bugpoint can now debug arbitrary
-modes of llc</a> and lli, by passing them command line flags (e.g.,
-<tt>-regalloc=linearscan</tt>, <tt>-enable-correct-eh-support</tt>, etc.) </li>
-<li>The Control Flow Graph in the native code generators is no longer
-constrained to be the same as the CFG for the LLVM input code.</li>
-<li>The LLVM induction variable analysis routines have been rewritten.</li>
-<li>LLVM now has new loop unrolling and loop unswitching passes.</li>
-<li>The induction variable substitution pass performs linear function test
-replacement and exit value replacement optimizations.</li>
-<li>LLVM now has first-class support for <a href="GarbageCollection.html">Accurate
-Garbage Collection</a>, enabling the use of aggressive copying and generational
-collectors.</li>
-<li>LLVM now includes an implementation of Andersen's interprocedural alias
-analysis algorithm.</li>
-<li>Bugpoint can <a href="http://llvm.cs.uiuc.edu/PR327">extract individual
-basic blocks</a> to track down reduce miscompilation testcases.</li>
-<li>LLVM and the C front-end now work under Win32 using the
-<a href="http://www.cygwin.com">Cygwin</a> runtime libraries.
-This includes the JIT compiler.</li>
-<li>The LLVM code generator is now being <a
- href="CodeGenerator.html">documented</a>.</li>
-<li>There is a new tool, llvm-abcd, the Analysis of ByteCode Dumper (abcd).
-This tool can compute basic statistics and bytecode density statistics on a
-module or function basis and also dump out bytecode in a textual format that
-is lower level than assembly (values are not resolved from slot numbers).
-It should only be of interest to (a) those who are working to improve the
-bytecode format and (b) those who really want to understand or document the
-details of the bytecode format.</li>
-<li>The <a href="BytecodeFormat.html">LLVM Bytecode file format</a> is now
- being documented.</li>
-<li>LLVM now provides an <a href="LangRef.html#i_isnan">llvm.isnan</a> intrinsic
-for efficient implementation of unordered floating point comparisons.</li>
+ <li>LLVM now includes a JIT for the PowerPC target.</li>
+ <li>LLVM now optimizes global variables significantly more than it did
+ before.
+ </li>
+ <li>LLVM now includes the new '<tt>undef</tt>' value and
+ <a href="LangRef.html#i_unreachable"><tt>unreachable</tt></a> instruction,
+ which give the optimizer more information about the behavior of the
+ program.
+ </li>
+ <li>llvmgcc and llvmg++ now emit source line number information when '-g' is
+ passed in. This information can be used with llvm-db or other tools and
+ passes.
+ </li>
+ <li>The test/Programs hierarchy <a href="http://llvm.cs.uiuc.edu/PR257">has
+ been moved out of the main LLVM tree</a> into a separate CVS repository and
+ tarball. This shrinks the distribution size of LLVM itself significantly.
+ </li>
+ <li>Bytecode compression with bzip2 has been implemented. All bytecode files
+ generated by LLVM will now be compressed by default. Compression can be
+ disabled with the <tt>-disable-compression</tt> option to the tools that can
+ generate bytecode files.
+ </li>
+ <li>A generic <a href="http://llvm.cs.uiuc.edu/PR353">compiler driver</a> and
+ an associated <a href="CommandGuide/html/llvm-ld.html">generic linker</a> have
+ been implemented. The compiler driver is generic because it can be configured
+ to pre-process, translate, optimize, assemble, and link code from any source
+ language. This aids compiler writers because all that is needed is a
+ source-to-bytecode or source-to-assembly translator and a configuration file.
+ The linker is generic because it allows dynamically loadable optimization
+ modules to be executed for link-time optimization. Language specific
+ link-time optimization modules can be created and executed automatically.
+ </li>
+ <li>The <a href="http://llvm.cs.uiuc.edu/PR263">dependent libraries</a>
+ feature has been implemented. This allows front end compilers to indicate in
+ the bytecode which libraries the bytecode needs to be linked with. Both the
+ C/C++ front end and Stacker support generating the required libraries. The
+ Linker now supports using this information to ensure required libaries are
+ linked into the module. This minimizes the need to use the <tt>-l</tt> option
+ when using <a href="CommandGuide/html/llvmc.html"><tt>llvmc</tt></a>
+ </li>
+ <li>The LLVM makefiles have been improved to build LLVM faster (2x) and
+ includes new targets (like dist-check, uninstall). One important change is
+ associated with <a href="http://llvm.cs.uiuc.edu/PR456">PR456</a>. The
+ libraries and tools will now be built into <tt>$builddir/Debug/{bin,lib}</tt>
+ instead of <tt>$builddir/tools/Debug</tt> and <tt>$builddir/lib/Debug</tt>.
+ Similarly for <tt>Release</tt> and <tt>Profile</tt> builds.
+ </li>
+ <li>The LLVM source code is much more compatible with Microsoft Visual C++,
+ including the JIT and runtime-code generation, though the entire system
+ may not work with it.
+ </li>
+ <li>The target-to-JIT interfaces <a href="http://llvm.cs.uiuc.edu/PR283">are
+ now much simpler</a> and more powerful.
+ </li>
+ <li>zlib and libpng are <a href="http://llvm.cs.uiuc.edu/PR417">no longer
+ included in the main LLVM tarball</a>.</li>
+ <li>The LLVM code generator now generates asm writers for the target from
+ an abstract target description, instead of requiring them to be hand
+ written.</li>
+ <li>LLVM regression and feature tests can now be run with DejaGNU.</li>
+ <li>llvmgcc and llvmg++ now emit source-level line number information, making
+ it possible to map from LLVM code back to source. This is currently used
+ by llvm-db.</li>
+ <li>Floating point intensive programs on X86 systems run much faster
+ with the LLC code generator and JIT than in 1.3.</li>
</ol>
</div>
<div class="doc_text">
<ol>
-<li><a href="http://llvm.cs.uiuc.edu/PR82">LLVM cannot handle structures with
-more than 256 elements</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR38">[bugpoint] External functions used in
-non-instruction entities, such as global constant initializer</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR178">Stacker does not handle targets
-with 64-bit pointers.</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR290">Bugpoint doesn't support
-uses of external fns by immediate constant exprs</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR419">JIT interface should support
+ arbitrary calls</a>
+ </li>
+ <li>The <tt>llvm-ar</tt> tool was previously incomplete and didn't properly
+ support other ar(1) implementations. This has been corrected. <tt>llvm-ar</tt>
+ now fully supports all archive editing functions, table of contents listing,
+ extraction, and printing. It can also read BSD4.4/MacOSX and SVR4 style
+ archives. See <a href="CommandGuide/html/llvm-ar.html">llvm-ar</a> for
+ details.
+ </li>
</ol>
</div>
<div class="doc_text">
<ol>
-<li><a href="http://llvm.cs.uiuc.edu/PR305">LLVM tools will happily spew
-bytecode onto your terminal</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR329">[llvmgcc] type names are not emitted
-for structure typedefs</a></li>
-<li>All documentation is now conformant to the HTML 4.01 (Strict) level.</li>
-<li>The spurious "WARNING: Found global types that are not compatible" warning
-produced when linking C++ programs has been fixed.</li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR426">[llvmg++] Tons of warnings
+ are spewed when linking to libstdc++</a>
+ </li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR352">include/{Support,Config} ->
+ include/llvm/{Support,Config}</a>
+ </li>
+ <li>The names of the libraries generated by compiling LLVM source have been
+ changed to ensure they do not conflict with other packages upon installation.
+ Each LLVM library is now prefixed with LLVM and uses mixed clase. For example,
+ the library <tt>libasmparser.a</tt> in 1.3 has become
+ <tt>libLLVMAsmParser.a</tt> in release 1.4.
+ </li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR459">[llvmg++] C++ frontend is expanding
+ lots of unused inline functions</a></li>
</ol>
</div>
<div class="doc_text">
<ol>
-<li><a href="http://llvm.cs.uiuc.edu/PR301">Minor configure bugs with
--disable/enable-povray and -disable-spec</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR289">shell scripts output by gccld don't
-work if you change PATH</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR364">[llvmgcc] llvmgcc does not compile
-with gcc 3.4</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR256">[autoconf] further standardizing
+ autoconf usage</a>. Various improvements in the configure.ac script were
+ made as well as the makefile system.
+ </li>
</ol>
</div>
<div class="doc_text">
<ol>
-<li>Fixed: <a href="http://llvm.cs.uiuc.edu/PR309">[vmcore] Code quality problem
-due to long operand of getelementptr</a></li>
-
-<li>The X86 backend now generates substantially better code for 64-bit integer
-and floating point operations.</li>
-
-<li>The -inline pass no longer inlines mutually recursive functions until it
-hits the inlining threshold.</li>
-
-<li>The -inline pass no longer misses obvious inlining opportunities just
-because the callee eventually calls into an external function.</li>
-
-<li>The -simplifycfg pass can now "if convert" simple statements into the new
-<tt>select</tt> instruction.</li>
-
-<li>The -loopsimplify pass can now break <a
-href="http://llvm.cs.uiuc.edu/PR35">natural loops with multiple backedges</a>
-into multiple nested loops. This enables a variety of subsequent
-optimizations.</li>
-
-<li>The -adce pass can now eliminate calls to functions that do not not write to
-memory.</li>
-
-<li>The link-time optimizer now runs the -prune-eh pass (to remove unused
-exception handlers).</li>
-
-<li>The -simplifycfg pass can now eliminate simple correlated branches (such as
-"<tt>if (A < B && A < B)</tt>", and can turn short-circuiting
-operators into the strict versions when useful (such as "<tt>if (A < B || A
-> C)</tt>" into "<tt>if (A < B | A > C)</tt>"</li>
-
-<li>LLVM now has infrastructure for (simple and sparse conditional) constant
-propagation of function calls. It currently supports a few math library
-functions like sqrt/sin/cos/etc.</li>
-
-<li>The C backend now emits <a href="http://llvm.cs.uiuc.edu/PR334">Syntactic
-loops</a> in the code to help C compilers whose optimizers do not recognize
-loops formed from gotos (like GCC).</li>
-
-<li>Fixed: <a href="http://llvm.cs.uiuc.edu/PR368">[sparcv9] null
-often spilled to constant pool</a>.</li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR362">Ugly code generated for
+ std::min/std::max</a>
+ </li>
</ol>
</div>
<div class="doc_text">
-<p>Bugs in the LLVM Core:</p>
+<p>Bugs fixed in the LLVM Core:</p>
<ol>
-<li><a href="http://llvm.cs.uiuc.edu/PR330">[vmcore] Linker causes erroneous
-asssertion</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR306">[loopsimplify] Loop simplify
-incorrectly updates dominator information</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR310">[tailduplicate] DemoteRegToStack
-breaks SSA form</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR313">[X86] JIT miscompiles unsigned short
-to floating point cast</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR332">[adce] Crash handling unreachable
-code that unwinds</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR333">[sparc] LLC can't emit 2 functions
-of the same name, both having constant pools</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR337">[livevar] Live variables missed
-physical register use of aliased definition</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR340">Verifier misses malformed switch instruction</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR315">[jit] abort, don't warn, when missing external functions encountered</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR369">[X86] stackifier crash on floating point setcc X, X</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR420">[licm] LICM invalidates alias
+ analysis info and uses broken information</a> (optimizer crash)</li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR422">[asmwriter] Asmwriter is really
+ slow for functions with lots of values</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR423">[anders-aa] Andersen's AA is
+ completely broken in LLVM 1.3</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR430">[bcwriter] Empty compaction
+ tables defined</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR227">[X86] llc output for functions
+ w/certain names tickles GNU 'as' bugs</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR472">[cbackend] Static globals are
+ prototyped as 'extern'</a></li>
</ol>
<p>Bugs in the C/C++ front-end:</p>
<ol>
-<li><a href="http://llvm.cs.uiuc.edu/PR326">[llvmgcc] Crash on use of undeclared
-enum type</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR298">[llvmgcc] Variable length array
-indexing miscompiled</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR355">[llvmgcc] Errors handling function prototypes that take opaque structs by-value</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR445">[llvmg++] not enough templates are
+ instantiated</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR450">[llvmg++] Extern const globals
+ cannot be marked 'constant' if they have nontrivial ctors or dtors</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR461">[llvmgcc] Crash compiling unnamed
+ bitfield which does not increase struct size</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR424">[llvmgcc] llvmgcc emits invalid
+ constant exprs</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR421">[llvmg++] Crash in initializing
+ array with constructors in hard EH situations</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR397">[llvm-gcc] Inline function
+ redefinitions error due to 'asm' function rename</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR244">[llvm-gcc] Error when an
+ implicitly external function is re-declared as static</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR360">[llvmgcc] Structure field with
+ non-constant offset crashes llvmgcc</a></li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR447">[llvmg++] Crash compiling
+ friend with default argument</a></li>
+</ol>
+
+<p>Bugs fixed in the Sparc V9 back-end:</p>
+
+<ol>
+ <li><a href="http://llvm.cs.uiuc.edu/PR428">[sparcv9] regalloc assertion
+ failure with certain indirect calls</a></li>
</ol>
+
</div>
<!-- *********************************************************************** -->
<li>Intel and AMD machines running Red Hat Linux and FreeBSD (and probably
other unix-like systems).</li>
<li>Sun UltraSPARC workstations running Solaris 8.</li>
-<li>PowerPC-based Mac OS X boxes, running 10.3 and above (C backend and
- interpreter only, no native codegen is available yet).</li>
<li>Intel and AMD machines running on Win32 with the Cygwin libraries.</li>
+<li>PowerPC-based Mac OS X boxes, running 10.2 and above.</li>
</ul>
-
<p>The core LLVM infrastructure uses
<a href="http://www.gnu.org/software/autoconf/">GNU autoconf</a> to adapt itself
to the machine and operating system on which it is built. However, minor
LLVM and the C frontend out of a top-level directory without spaces (e.g.,
<tt>/cygdrive/c/llvm</tt>). Also, make sure to install <b>all</b> of the
cygwin packages. By default, many important tools are not installed that
-are needed by the LLVM build process or test suite (e.g., /bin/time).</p>
-
-</div>
-
-<!--=========================================================================-->
-<div class="doc_subsection">
-In this release, the following portability problems were fixed:
-</div>
-
-<div class="doc_text">
-
-<ol>
-<li><a href="http://llvm.cs.uiuc.edu/PR304">warnings compiling Stacker compiler
-on Mac OS X</a></li>
-<li><a href="http://llvm.cs.uiuc.edu/PR308">Archive file reader doesn't
-understand abbreviated names in headers</a></li>
-</ol>
+are needed by the LLVM build process or test suite (e.g., /bin/time). Finally,
+please make sure that there are no directories with spaces in them in your
+PATH environment variable.</p>
</div>
<ul>
<li>The following passes are incomplete or buggy: <tt>-pgmdep, -memdep,
- -ipmodref, -sortstructs, -swapstructs, -cee</tt></li>
-
+ -ipmodref, -cee, -branch-combine, -instloops, -paths</tt></li>
<li>The <tt>-pre</tt> pass is incomplete (there are cases it doesn't handle that
it should) and not thoroughly tested.</li>
-<li>The <tt>llvm-ar</tt> tool is incomplete and probably buggy.</li>
<li>The <tt>llvm-db</tt> tool is in a very early stage of development.</li>
+<li>The "iterative scan" register allocator (enabled with -regalloc=iterativescan)
+ is not stable.</li>
</ul>
</div>
<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.</li>
-
-<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).</li>
-
-<li>The gccld program <a href="http://llvm.cs.uiuc.edu/PR139">does not link
-objects/archives in the order specified on the command line.</a></li>
-
-<li><a href="http://llvm.cs.uiuc.edu/PR240">The lower-invoke pass does not mark
-values live across a setjmp as volatile</a>. This missing feature only affects
-targets whose setjmp/longjmp libraries do not save and restore the entire
-register file.</li>
+ <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.
+ </li>
+ <li>Linking in static archive files (.a files) is slow by default because
+ there is no symbol table in the archive. To remedy this, run
+ <a href="CommandGuide/html/llvm-ranlib.html"><tt>llvm-ranlib</tt></a> on the
+ archive to add an LLVM symbol table.
+ </li>
+ <li>The gccld program <a href="http://llvm.cs.uiuc.edu/PR139">does not link
+ objects/archives in the order specified on the command line.</a>
+ </li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR240">The lower-invoke pass does not
+ mark values live across a setjmp as volatile</a>. This missing feature
+ only affects targets whose setjmp/longjmp libraries do not save and restore
+ the entire register file.</li>
+ <li><a href="http://llvm.cs.uiuc.edu/PR427">[bytecode] Assertion on V1
+ Bytecode Files</a>. This bug won't be fixed because V1 bytecode had its own
+ problems, no one is using V1 bytecode any more, and the fix is non-trivial.
+ </li>
</ul>
</div>
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).</li>
-
+ <tt>__builtin_constant_p</tt>, and <tt>__builtin_expect</tt>
+ (currently ignored). We also support builtins for ISO C99 floating
+ point comparison macros (e.g., <tt>__builtin_islessequal</tt>).</li>
</ol>
<p>The following extensions <b>are</b> known to be supported:</p>
<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/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-3.4.0/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>
<ul>
<li>The C++ front-end inherits all problems afflicting the <a href="#c-fe">C
front-end</a>.</li>
+
+<li><b>IA-64 specific</b>: The C++ front-end does not use <a
+href="http://llvm.cs.uiuc.edu/PR406">IA64 ABI compliant layout of v-tables</a>.
+In particular, it just stores function pointers instead of function
+descriptors in the vtable. This bug prevents mixing C++ code compiled with
+LLVM with C++ objects compiled by other C++ compilers.</li>
+
</ul>
+
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_text">
<ul>
-<li>None so far.
+ <li>none yet</li>
+</ul>
+
+</div>
+
+<!-- ======================================================================= -->
+<div class="doc_subsection">
+ <a name="sparcv9-be">Known problems with the SparcV9 back-end</a>
+</div>
+
+<div class="doc_text">
+
+<ul>
+<li><a href="http://llvm.cs.uiuc.edu/PR60">[sparcv9] SparcV9 backend miscompiles
+several programs in the LLVM test suite</a></li>
</ul>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection">
- <a name="sparc-be">Known problems with the Sparc back-end</a>
+ <a name="ppc-be">Known problems with the PowerPC back-end</a>
</div>
<div class="doc_text">
<ul>
-<li>There are several programs in the LLVM testsuite that the Sparc code generator is known to miscompile.</li>
+<li>none yet</li>
</ul>
</div>
projects / oota-llvm.git / blobdiff