Re: Compiling the JIT with LLVM 3.8

[Julien Bect]

Le 24/07/2017 à 23:38, John W. Eaton a écrit :
> On 07/24/2017 04:58 PM, Julien Bect wrote:
> > Hi all,
> >
> > I have managed to compile Octave stable (4.2.1+) with LLVM 3.8 using 
> > MCJIT.
> >
> > I have a very limited understanding of both LLVM and Octave's JIT, 
> > but there some encouraging signs:
> >
> > 1) I can build with --enable-jit
> >
> > 2) I get a good speedup on the attached function
> >
> > address@hidden:~/.local/src/octave-stable$ ./run-octave --no-gui
> > GNU Octave, version 4.2.1
> > [...]
> >
> > octave:1> tic;  z = test_pisum (),  toc
> > z =  1.6448
> > Elapsed time is 11.6463 seconds.
> >
> > octave:2> jit_enable (1)
> >
> > octave:3> tic;  z = test_pisum (),  toc
> > z =  1.6448
> > Elapsed time is 0.054471 seconds.
> >
> > octave:4> tic;  z = test_pisum (),  toc
> > z =  1.6448
> > Elapsed time is 0.019253 seconds.
> >
> > octave:5> tic;  z = test_pisum (),  toc
> > z =  1.6448
> > Elapsed time is 0.019371 seconds
> >
> > Bad news: I still get a crash on make check due to jit.tst
> >
> > My patches are still very unpolished (supports only LLVM 3.8, not 
> > autoconf stuff yet) but I can share them if someone is interested.
> >
> > Where would be the proper place ?  bug tracker ?  patch tracker ? 
> > somewhere else ?
>
> Create a bug report (build failure, I suppose) and post the patch there.

https://savannah.gnu.org/bugs/?51574