[LLVMdev] MCJIT

Ashok Nalkund ashoknn at qualcomm.com
Mon May 14 10:21:05 PDT 2012


On 5/14/2012 9:51 AM, Jim Grosbach wrote:
>
>>>
>>> If you're hitting that code, you're running the old JIT (which does indeed not support inline assembly), not the MCJIT.
>>>
>>
>> Do I need to enable anything at configure, my configure looks like this:
>>> ../llvm/configure --enable-libffi --enable-targets=host-only --prefix=/local/mnt/workspace/ashoknn/crd/neo/llvm/proto/llvmsvn/build/bin
>>
>> I added the enable-libffi when trying to figure out resolving external libs.
>>
>
>
> No, selecting MCJIT vs. the old JIT is done in the EngineBuilder. If you're using lli, you can pass -use-mcjit on the command line. If you're using your own driver, you can use the lli.cpp for a reference.
>
> -Jim

Thats what I was pointed to earlier, and following that I set the flag 
in EngineBuilder.setUseMCJIT(true). I looked at the code of 
EngineBuilder, it saves the flag but the flag doesnt seem to be used 
anywhere. Am I missing something?

thanks,
ashok



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