[Libjit-developers] various free JIT libraries?

[Basile STARYNKEVITCH]

Hello All,

First: where is the current libjit CVS? Still on
cvs -z3 \
 -d:pserver:address@hidden:/sources/dotgnu-pnet \
 co libjit
Is there some more active CVS or other repository (SVN? darcs?)

Does any one have comparaisons between various free opensource JIT 
libraries, a bit like:

   libjit
      GPL licence
      medium sized library (65KLOC)
      offer an internal VM for machines not yet targetted
      target x86 (32bits), ARM, Alpha
      missing AMD64 target
      generate code of medium-good quality at medium-good speed
      may produce *.so ELF files
      handles several registers well
      C & C++ API: the abstract syntax tree is built in memory then JITed
      medium sized community
      small community
      used in DotGnu PNET

   lightning
      LGPL licence
      small "library" -only include files acually (22KLOC)
      targets x86, PowerPC32, AMD64, Sparc32
      quick generation of simple (unoptimized) machinecode in memory
      handle few registers (6)
      C API : each macro emits a few machine instruction
      design model: a tiny 6 register RISC machine
      used in GNU Smalltalk, CLISP?
      small community

   tinycc
      a C compiler able to compile C code from memory
      to machine code memory
      nearly dead project
      target x86, ARM (not AMD64)
      quick compilation from C to unoptimized machine code
      C API : given a char* of a C code, generate machine code
      buggy for generation of ELF shared objects


   llvm
      an entire compiler, whose middle-end can be used to JIT
      large community
      targets x86, AMD64, ARM, Sparc32&64
      sometimes uses an external assembler
      able to make many optimisations
      generate optimized code from a C++ AST (or external syntax)
      may generate *.so in ELF files
      extra support for various Garbage Collectors
      big C++ library (about 500KLOC)

   gcc
      just write a C code file and gcc -fPIC it and dlopen it
      large community many targets
      not really a JIT


  Maybe we should add more, in particular ParrotCode, LuaJIT, some 
Jitting JVMs (kaffe?) ...
(and some haskell jitting library?)

What I would be interested in is what (opensource) projects are using 
these JIT libraries, and ideally a quantitative comparison of them...

For Libjit, I only know of dotnet using it. what else?

Are there any programs which uses several JIT-ing libraries and is able 
to compare them in term of : speed of the JITting (ie machine code 
generation) and speed/size of the generated machine code

Regards.

--
Basile STARYNKEVITCH         http://starynkevitch.net/Basile/
email: basile<at>starynkevitch<dot>net mobile: +33 6 8501 2359
8, rue de la Faiencerie, 92340 Bourg La Reine, France
*** opinions {are only mines, sont seulement les miennes} ***