[LLVMdev] perf tool support in MCJIT

[sathvik]

Hi Jose,

with the MCJIT model, the size of the functions can be pre-determined, so
there wouldn't be a need to call the slower disassemble subroutine. I will
try writing a simpler patch and submit it and perhaps it can be up
streamed.

Thanks
sathvik


On Fri, May 23, 2014 at 3:11 AM, Jose Fonseca <jfonseca at vmware.com> wrote:

> FWIW, Mesa3D has some LLVM <-> linux perf integration (and disassembly
> output too).  This responsibility can and probably should be moved upstream
> to LLVM though.
>
> For more information see:
>
> http://cgit.freedesktop.org/mesa/mesa/tree/src/gallium/auxiliary/gallivm/lp_bld_debug.cpp#n411
>   http://cgit.freedesktop.org/mesa/mesa/tree/bin/perf-annotate-jit
>
> Jose
>
> ----- Original Message -----
> > I believe the perf tool cannot profile/analyze the JITed code in MCJIT
> model.
> >
> > Can you please confirm this ? I was working on a patch to fix this.
> >
> > Another question, is the there any support to map the llvm IR with x86
> > generated assembly ? so its easier to analyze the code generator.
> >
> > _______________________________________________
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