llvm dev - Jul 2017 - Question

​Hello all,
I am trying to use optimization passes of llvmlite for my own program. I have
deifned the following function for my code as pass function:

def create_pass_manager_builder(opt=3, loop_vectorize=False,
slp_vectorize=False):
    pmb = llvm.create_pass_manager_builder()
    pmb.opt_level = opt
    pmb.loop_vectorize = loop_vectorize
    pmb.populate = populate
    pmb.add_dead_code_elimination_pass = add_dead_code_elimination_pass
    pmb.slp_vectorize = slp_vectorize
    pmb.inlining_threshold = _inlining_threshold(opt)
    return pmb

and I try to run it using the following:

module_ref = llvm1.parse_assembly(str(module))
pmb = llvm.create_pass_manager_builder()
pmb.opt_level = 3
pm = llvm.create_module_pass_manager()
pmb.populate(pm)
pm.run(module_ref)

Having this I do have some optimization for my code. However, when I change the
optimization level from 3 to 2 or 0, there is no difference for optimization.
Does anyone know why this happens?

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Hi Samaneh,

please "use" the subject in your emails and try to be a little bit
more
exactly what your email is about. Just "question" or
"function" as a
email subject could be extended by some text. :)

Thanks in advance and best regards,
Thomas

Am 18.07.2017 17:41 schrieb Samaneh Berenjian via
llvm-dev:
> ​Hello all,
> I am trying to use optimization passes of llvmlite for my own program.
> I have deifned the following function for my code as pass function:
> 
> def create_pass_manager_builder(opt=3, loop_vectorize=False,
> slp_vectorize=False):
>  pmb = llvm.create_pass_manager_builder()
>  pmb.opt_level = opt
>  pmb.loop_vectorize = loop_vectorize
>  pmb.populate = populate
>  pmb.add_dead_code_elimination_pass = add_dead_code_elimination_pass
>  pmb.slp_vectorize = slp_vectorize
>  pmb.inlining_threshold = _inlining_threshold(opt)
>  return pmb
> 
> and I try to run it using the following:
> 
> module_ref = llvm1.parse_assembly(str(module))
> pmb = llvm.create_pass_manager_builder()
> pmb.opt_level = 3
> pm = llvm.create_module_pass_manager()
> pmb.populate(pm)
> pm.run(module_ref)
> 
> Having this I do have some optimization for my code. However, when I
> change the optimization level from 3 to 2 or 0, there is no difference
> for optimization. Does anyone know why this happens?
> 
> --
> This email was Anti Virus checked by Security Gateway.
> 
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