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Add notes about two known X86-64 limitations.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52108 91177308-0d34-0410-b5e6-96231b3b80d8
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Dan Gohman
2008-06-08 23:05:11 +00:00
parent f8e0b4e30e
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@@ -606,6 +606,11 @@ href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVMdev list</a>.</p>
currently due currently due
to <a href="http://llvm.org/PR2255">several</a> to <a href="http://llvm.org/PR2255">several</a>
<a href="http://llvm.org/PR2257">bugs</a> in FP stackifier <a href="http://llvm.org/PR2257">bugs</a> in FP stackifier
<li>The X86-64 backend does not yet support position-independent code (PIC)
generation on Linux targets.</li>
<li>The X86-64 backend does not yet support the LLVM IR instruction
<tt>va_arg</tt>. Currently, the llvm-gcc front-end supports variadic
argument constructs on X86-64 by lowering them manually.</li>
</ul> </ul>
</div> </div>