llvm dev - Mar 2019 - Static constructors with ORC JIT?

Hi all,

Is there way to tell the ORC JIT infrastructure to run the static constructors
in a module that has just been compiled? I see that the ExecutionEngine class
has a runStaticConstructorsDestructors function, is that relevant with ORC and
if so, how should it be accessed? Thanks, Daniele
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Hi Daniele,

The easiest way is to collect the constructors from the modules and then execute
them manually as you would with any other function.
The simplest solution is to take this code and modify it to get the list of
constructor functions:
https://github.com/llvm-mirror/llvm/blob/1154d31e8c429e53307d3fc0edd13d9b261c26dc/lib/ExecutionEngine/ExecutionEngine.cpp#L370

This might be not the most ideal solution, but it works.

Cheers,
Alex.
> On 14. Mar 2019, at 22:15, Daniele Vettorel via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> Hi all,
> 
> Is there way to tell the ORC JIT infrastructure to run the static
constructors in a module that has just been compiled? I see that the
ExecutionEngine class has a
> runStaticConstructorsDestructors 
> function, is that relevant with ORC and if so, how should it be accessed?
Thanks, Daniele
> 
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

Thank you Alex,

I went and implemented a solution along those lines. It works well.

It may be worth mentioning static constructors in the Kaleidoscope tutorial.

Cheers,
Daniele
________________________________________
From: Alex Denisov [1101.debian at gmail.com]
Sent: 15 March 2019 08:07
To: Daniele Vettorel
Cc: llvm-dev at lists.llvm.org
Subject: Re: [llvm-dev] Static constructors with ORC JIT?

Hi Daniele,

The easiest way is to collect the constructors from the modules and then execute
them manually as you would with any other function.
The simplest solution is to take this code and modify it to get the list of
constructor functions:
https://github.com/llvm-mirror/llvm/blob/1154d31e8c429e53307d3fc0edd13d9b261c26dc/lib/ExecutionEngine/ExecutionEngine.cpp#L370

This might be not the most ideal solution, but it works.

Cheers,
Alex.
> On 14. Mar 2019, at 22:15, Daniele Vettorel via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
>
> Hi all,
>
> Is there way to tell the ORC JIT infrastructure to run the static
constructors in a module that has just been compiled? I see that the
ExecutionEngine class has a
> runStaticConstructorsDestructors
> function, is that relevant with ORC and if so, how should it be accessed?
Thanks, Daniele
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev