Re: WIP: expression evaluation improvements

Hey Andres,

After looking at
v2-0006-jit-Reference-functions-by-name-in-IOCOERCE-steps.patch, I was
wondering
about other places in the code where we have const pointers to functions
outside
LLVM's purview: specially EEOP_FUNCEXPR* for any function call expressions,
EEOP_DISTINCT and EEOP_NULLIF which involve operator specific comparison
function call invocations, deserialization and trans functions for
aggregates
etc. All of the above cases involve to some degree some server functions
that
can be inlined/optimized.

If we do go down this road, the most immediate solution that comes to mind
would
be to populate referenced_functions[] with these. Also, we can replace all
l_ptr_const() calls taking function addresses with calls to
llvm_function_reference() (this is safe as it falls back to a l_pt_const()
call). We could do the l_ptr_const() -> llvm_function_reference() even if we
don't go down this road.

One con with the approach above would be bloating of llvmjit_types.bc but we
would be introducing @declares instead of @defines in the IR...so I think
that
is fine.

Let me know your thoughts. I would like to submit a patch here in this
thread or
elsewhere.

--
Soumyadeep