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docs/ReleaseNotes.html: Add a few notes to MCCOFF and x64. FIXME: fixme!

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llvm-svn: 128882
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NAKAMURA Takumi 2011-04-05 08:24:22 +00:00
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@ -297,10 +297,13 @@ in this section.
<p>LLVM 2.9 includes several major new capabilities:</p>
<ul>
<li><pre>
last release for llvm-gcc
TBAA
Triple::normalize is new, llvm triples are always stored in normalized form internally.
Triple x86_64--mingw64 is obsoleted. Use x86_64--mingw32 instead.
MC Assembler: X86 now generates much better diagnostics for common errors,
is much faster at matching instructions, is much more bug-compatible with
the GAS assembler, and is now generally useful for a broad range of X86
@ -348,9 +351,9 @@ MC assembler support for 3dNow! and 3DNowA instructions.
LoopIndexSplit pass was removed, unmaintained.
COFF support in the MC assembler has made a lot of progress in the 2.9
Win32 PE-COFF support in the MC assembler has made a lot of progress in the 2.9
timeframe, but is still not generally useful. Please see
"http://llvm.org/bugs/showdependencytree.cgi?id=9100&amp;hide_resolved=1" for open bugs"?
"http://llvm.org/bugs/showdependencytree.cgi?id=9100&amp;hide_resolved=1" for open bugs?
New <a href="WritingAnLLVMPass.html#RegionPass">RegionPass</a> infrastructure
for region-based optimizations.
@ -358,6 +361,7 @@ New <a href="WritingAnLLVMPass.html#RegionPass">RegionPass</a> infrastructure
MicroBlaze: major updates for aggressive delay slot filler, MC-based assembly
printing, assembly instruction parsing, ELF .o file emission, and MC
instruction disassembler.
</pre></li>
</ul>
Still todo: [101025-110228]
@ -431,8 +435,7 @@ href="http://blog.llvm.org/2010/04/intro-to-llvm-mc-project.html">Intro to the
LLVM MC Project Blog Post</a>.
</p>
</div>
</div>
<!--=========================================================================-->
<div class="doc_subsection">
@ -461,6 +464,7 @@ FastISel for ARM.
</p>
<ul>
<li>Several bugs have been fixed for Windows x64 code generator.</li>
</ul>
</div>
@ -569,13 +573,23 @@ href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVMdev list</a>.</p>
all <a href="http://llvm.org/PR879">inline assembly that uses the X86
floating point stack</a>. It supports the 'f' and 't' constraints, but not
'u'.</li>
<li>Win64 code generation wasn't widely tested. Everything should work, but we
expect small issues to happen. Also, llvm-gcc cannot build the mingw64
runtime currently due to lack of support for the 'u' inline assembly
constraint and for X87 floating point inline assembly.</li>
<li>The X86-64 backend does not yet support the LLVM IR instruction
<tt>va_arg</tt>. Currently, front-ends support variadic
argument constructs on X86-64 by lowering them manually.</li>
<li>Windows x64 (aka Win64) code generator has a few issues.
<ul>
<li>llvm-gcc cannot build the mingw-w64 runtime currently
due to lack of support for the 'u' inline assembly
constraint and for X87 floating point inline assembly.</li>
<li>On mingw-w64, you will see unresolved symbol <tt>__chkstk</tt>
due to <a href="http://llvm.org/bugs/show_bug.cgi?id=8919">Bug 8919</a>.
It is fixed in <a href="http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20110321/118499.html">r128206</a>.</li>
<li>Miss-aligned MOVDQA might crash your program. It is due to
<a href="http://llvm.org/bugs/show_bug.cgi?id=9483">Bug 9483</a>,
lack of handling aligned internal globals.</li>
</ul>
</li>
</ul>
</div>