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On 9/13/11 8:14 AM, Michael Clagett wrote:
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Hi --<br>
<br>
I'm still very much a newbie with llvm, but am looking
(hopefully) to use it to compile into native intel code a set
of source that is a combination of byte codes for my own
custom vm and intel code that has been coded in assembly
language directly.<br>
<br>
In an earlier exchange, I already discovered that llvm does
not do any optimizations on intel assembly language code.
This would be an interesting thing to add, I believe, and I
may make some progress in that direction as I proceed. But in
the meantime I'm wondering if the following makes sense: To
write two separate translation mechanisms; one that translates
the assembler code associated with each of my byte codes into
a sequence of llvm intermediate code instructions, and the
other to do the same with instructions coded directly in intel
assembly (i.e there would be a one-to-one correspondence
between intel assembly language statements and llvm
intermediate code statements, substituting real register
assignments with llvm virtual register assignments.<br>
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Another option for handling the assembly language fragments is to
convert them into inline assembly code within the LLVM IR that you
generate. This might be worth exploring if converting the assembly
code into LLVM IR is either difficult or causes a performance hit.<br>
<br>
-- John T.<br>
<br>
<br>
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It strikes me that if I did this, I would then have
instruction sequences (whether originating in my byte code or
in intel assembly language) that could be submitted to the
llvm optimization engine. Does this make sense to any of you
old hands?<br>
<br>
Thanks.<br>
<br>
Mike<br>
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