[LLVMdev] LLVM virtual machine

Herbei Dacian dacian_herbei at yahoo.fr
Thu Sep 19 08:56:59 PDT 2013

Hi John,
maybe if I help you I can get faster into my own problem.
So may I?
Maybe in two we could replace the inline assembly too.

 From: John Criswell <criswell at illinois.edu>
To: Herbei Dacian <dacian_herbei at yahoo.fr> 
Cc: Konstantin Tokarev <annulen at yandex.ru>; "llvmdev at cs.uiuc.edu" <llvmdev at cs.uiuc.edu> 
Sent: Thursday, 19 September 2013, 17:37
Subject: Re: [LLVMdev] LLVM virtual machine

On 9/19/13 9:53 AM, Herbei Dacian wrote:

>Hi Konstantin,
>good point.
>but I my intention is to have something like the llva project.
If you want something like the LLVA project for user-space
    applications, then you basically want to use LLVM as-is.  The only
    things missing are the instructions that replace certain in-line
    assembly sequences that cannot be represented by regular LLVM
    instructions or LLVM intrinsics (e.g., context switching), and
    chances are good that you don't need them unless you're supporting
    kernel code or something like a user-space pthreads library (or you
    are really pedantic about not using inline assembly code).

As an FYI, I'm building a new version of SVA (LLVA) that works on
    64-bit x86 processors.  It supports the FreeBSD 9.0 kernel.  I
    probably won't replace all the inline assembly code in the FreeBSD
    kernel like I did for Linux 2.4.22 years ago, but most of the
    important features will be there (and are, in fact, already

We plan to release this version as open-source software within the
    next year (I suppose we could release the old version, too, but
    nobody uses Linux 2.4 on x86 anymore), but I don't have a timeline
    for that yet.  My first order of business is to use the new SVA
    system to graduate.

-- John T.

Basically I would like to define a machine that looks as if it has processors running natively llvm code.
>And when that runs enhance the llvm byte code with some specific
>Besides this if I make my measurements on the running of llvm
        bytecode I can test several platforms simultaneously because I
        can translate the enhancements done on llvm code in
        optimizations specific for each platform without having to redo
        the research.
> From: Konstantin Tokarev <annulen at yandex.ru>
>To: Herbei Dacian <dacian_herbei at yahoo.fr>; "llvmdev at cs.uiuc.edu" <llvmdev at cs.uiuc.edu> 
>Sent: Thursday, 19 September 2013, 16:25
>Subject: Re: [LLVMdev] LLVM virtual machine
>19.09.2013, 18:20, "Herbei Dacian" <dacian_herbei at yahoo.fr>:
>> Hi,
>> Is there possible to run the llvm byte code purely
              interpreted with lli?
>> I know there is this option but in the documentation
              is stated also that the option is not working and is not
>> Did I understand wrong? Is it working?
>> Is anyone working on this option?
>> I would like to make something similar to q-emu or
>In this case you probably need to interpret machine code
              (or assembly language) instead of llvm bitcode.
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