llvm dev - Sep 2021 - Reg: Executing ModulePass before O2/O3 optimizations

Hello Everyone
    I have created a custom ModulePass which works fine when no
optimization flag is enabled i.e. on -O0 level. I am trying to order the
passes such that I run my ModulePass first and then the O2/O3
optimizations. Currently I am doing it in multiple steps, where at each
step I getting the transformed IR and providing as input. Is it possible to
specify this order in when invoking via clang itself.
Kindly guide me in this.

Thanking you
Sai
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If you're using the new PassManager you can register your Pass
with PassBuilder::registerPipelineStartEPCallback.

-Min

On Wed, Sep 15, 2021 at 8:16 AM Sai Venkata Krishnan V via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Hello Everyone
>     I have created a custom ModulePass which works fine when no
> optimization flag is enabled i.e. on -O0 level. I am trying to order the
> passes such that I run my ModulePass first and then the O2/O3
> optimizations. Currently I am doing it in multiple steps, where at each
> step I getting the transformed IR and providing as input. Is it possible to
> specify this order in when invoking via clang itself.
> Kindly guide me in this.
>
> Thanking you
> Sai
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>

-- 
Min-Yih Hsu
Ph.D Student in ICS Department, University of California, Irvine (UCI).
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