[LLVMdev] Dynamically loading native code generated from LLVM IR
baris.aktemur at ozyegin.edu.tr
Fri Oct 12 11:14:32 PDT 2012
On 12 Eki 2012, at 20:00, Jim Grosbach wrote:
> On Oct 12, 2012, at 7:07 AM, Baris Aktemur <baris.aktemur at ozyegin.edu.tr> wrote:
>> Dear Tim,
>>> The JIT sounds like it does almost exactly what you want. LLVM's JIT
>>> isn't a classical lightweight, dynamic one like you'd see for
>>> memory, take care of the relocations for you and then jump into it (or
>>> provide you with a function-pointer). Is there any other reason you
>>> want to avoid it?
>> Based on the experiments I ran, JIT version runs significantly slower than the code compiled to native. But according to your explanation, this shouldn't have happened. I wonder why I witnessed the performance difference.
> Did you compile the native version with any optimizations enabled?
Yes. When I dump the IR, I get the same output as "clang -O3". Are the back-end optimizations enabled separately?
>> Thank you.
>> -Baris Aktemur
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
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