llvm dev - Nov 2019 - Optimization Record

I want to know all the optimization applied by the passes.

I found two options in clang
1. -fsave-optimization-record  2. -Rpass-analysis=...

However, they have nothing to do with the interaction btw IR files(.ll)
Is there any tool that records all optimizations on IR file?
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Hi,
> On Nov 27, 2019, at 07:16, Sooyeon Lee via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> I want to know all the optimization applied by the passes.
> 
> I found two options in clang
> 1. -fsave-optimization-record  2. -Rpass-analysis=...
> 
> However, they have nothing to do with the interaction btw IR files(.ll)
> Is there any tool that records all optimizations on IR file?

Are you looking for a way to save all optimization remarks/records when using
‘opt’? I think passing `-pass-remarks-output=foo.yaml` should do the trick and
create a YAML file with the optimization remarks.

There also are additional flags to selectively print remarks:

*  -pass-remarks=‘pass-name’ …. Print optimization remarks for pass-name
*  -pass-remarks-missed=‘pass-name’ …. Print missed optimization remarks for
pass-name
*  -pass-remarks-analysis=‘pass-name’ …. Print analysis optimization remarks for
pass-name

pass-name can also be a regular expression for the above.

Cheers,
Florian

Thank you.
It seems that -pass-remarks records the behavior of some passes. gvn, licm,
etc.

How can I detect the basic blocks that are modified when one pass is
applied?
I want to avoid adding some methods to all transform passes.

Best regards,
Sooyeon

2019년 11월 27일 (수) 오후 6:01, Florian Hahn <florian_hahn at apple.com>님이 작성:
> Hi,
>
> > On Nov 27, 2019, at 07:16, Sooyeon Lee via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
> >
> > I want to know all the optimization applied by the passes.
> >
> > I found two options in clang
> > 1. -fsave-optimization-record  2. -Rpass-analysis=...
> >
> > However, they have nothing to do with the interaction btw IR
files(.ll)
> > Is there any tool that records all optimizations on IR file?
>
>
> Are you looking for a way to save all optimization remarks/records when
> using ‘opt’? I think passing `-pass-remarks-output=foo.yaml` should do the
> trick and create a YAML file with the optimization remarks.
>
> There also are additional flags to selectively print remarks:
>
> *  -pass-remarks=‘pass-name’ …. Print optimization remarks for pass-name
> *  -pass-remarks-missed=‘pass-name’ …. Print missed optimization remarks
> for pass-name
> *  -pass-remarks-analysis=‘pass-name’ …. Print analysis optimization
> remarks for pass-name
>
> pass-name can also be a regular expression for the above.
>
> Cheers,
> Florian
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