[LLVMdev] refs to LLVM consultants

[Lang Hames]

Hi Liam,

CC'ing the dev list, since some people there might be interested in this
too.

There are two other Orc-based JITs in tree. One is the MCJIT replacement,
which you'll find in lib/ExecutionEngine/Orc/OrcMCJITReplacement.*, and the
other is OrcLazyJIT, which you'll find in tools/lli/OrcLazyJIT.*. The
former is just emulating MCJIT's behaviour, the latter is doing true lazy
compilation of bitcode. Both are hooked up to lli, and be accessed using
the -jit-kind option.

A useful source of bitcode examples is the regression test suite:
test/ExecutionEngine/OrcMCJITReplacement and test/ExecutionEngine/OrcLazy.
Each of these has at least a simple "hello.ll" file. OrcLazy is new, so
there's not much more than that. OrcMCJITReplacement has duplicates of all
of MCJIT's regression tests.

There are no examples that #ifdef out layers. This can be done, but we
don't have a use-case for it yet. Do you have one in mind?

Cheers,
Lang.

On Mon, Apr 13, 2015 at 11:12 PM, Liam Breck <liam at networkimprov.net> wrote:

> Hi again,
>
> Would it be helpful to have an ORC example in the repo that's not tied to
> Kaleidoscope?
>
> Something like...
> read IR from stdin
> find a table of functions
> jit table.init()
> jit other functions on-call
> provide a HelloWorld function for IR to invoke
>
> Perhaps it could demonstrate different approaches to JIT use via #ifdef
>
> Liam
>
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