[llvm-dev] thread safety ExecutionEngine::getFunctionAddress

[koffie drinker via llvm-dev]

Hi,

I'm trying to speed up the JIT time with llvm (3.9.1).
So far i've implemented the object cache, used FastISel and disabled
optimizations.
Jit time is still too slow for my purpose (I do have a lot of code to Jit).

http://llvm.org/docs/ProgrammersManual.html#threads-and-the-jit states that
we can invoke ExecutionEngine::getPointerToFunction() concurrently. This
function was replaced by ExecutionEngine::getFunctionAddress(). Is this
function also thread safe?

I want to speed up codegen by invoking parallel calls to
getfunctionaddress(). Currently  due the the large amount of code that has
to be Jitted, the getfunctionaddress() takes around 40% of my load time.

What is meant with "he user must still ensure that only one thread accesses
IR in a given LLVMContext while another thread might be modifying it" ?

If I pre-generate all IR, and before execution, invoke the parallel
getfunctionaddress() I should be fine right ? Since IR won't be modified
anymore.

Cheers,
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