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Code Issues Projects Releases Wiki Activity

Add win64

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llvm-svn: 52091
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Anton Korobeynikov 2008-06-08 10:24:13 +00:00
parent 5e8b8ee322
commit 9a0ee27d9a
1 changed files with 16 additions and 7 deletions
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@ -306,17 +306,20 @@ faster:</p>
area of passing and returning structures by value. llvm-gcc compiled code
now interoperates very well on X86-64 systems with other compilers.</li>
<li>Support for Win64 was added. This includes codegeneration itself, JIT
support and necessary changes to llvm-gcc.</li>
<li>The LLVM X86 backend now supports the support SSE 4.1 instruction set, and
the llvm-gcc 4.2 front-end supports the SSE 4.1 compiler builtins. Various
generic vector operations (insert/extract/shuffle) are much more efficient
when SSE 4.1 is enabled. The JIT automatically takes advantage of these
instructions, but llvm-gcc must be explicitly told to use them, e.g. with
<tt>-march=penryn</tt>.</li>
<li>The X86 backend now does a number of optimizations that aim to avoid
converting numbers back and forth from SSE registers to the X87 floating
point stack.</li>
<li>The X86 backend supports stack realignment, which is particularly useful for
vector code on OS's without 16-byte aligned stacks.</li>
@ -326,7 +329,7 @@ faster:</p>
<li>Trampolines (taking the address of a nested function) now work on
Linux/x86-64.</li>
<li><tt>__builtin_prefetch</tt> is now compiled into the appropriate prefetch
instructions instead of being ignored.</li>
@ -450,11 +453,17 @@ href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVMdev list</a>.</p>
<div class="doc_text">
<ul>
<li>The X86 backend does not yet support 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>The X86 backend generates inefficient floating point code when configured to
<li>The X86 backend does not yet support
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>The X86 backend generates inefficient floating point code when configured to
generate code for systems that don't have SSE2.</li>
<li>Win64 codegeneration wasn't widely tested. Everything should work, but we
expect small issues to happen. Also, llvm-gcc cannot build mingw64 runtime
currently due
to <a href="http://llvm.org/PR2255">several</a>
<a href="http://llvm.org/PR2257">bugs</a> in FP stackifier
</ul>
</div>