llvm dev - Oct 2021 - Correct Usage of Different Inlining Modes

Hi,

   I am trying to see the difference between different inlining options that 
llvm supports (https://clang.llvm.org/docs/analyzer/developer-docs/IPA.html). 
The way I invoked them was -

    clang++ -Xclang -analyzer-config -Xclang -ipa=dynamic -std=c++11 -Wall 
something.cc -o something (for dynamic mode)
    clang++ -Xclang -analyzer-config -Xclang -ipa=basic -std=c++11 -Wall 
something.cc -o something (for basic mode)

    and so on.

  However, I did't observe much difference in execution times for the runs 
with different inlining modes, which is making me wonder if I did this 
correctly? Is this the right way to use the different inlining modes? Can 
anyone tell me if I am missing something?


  Thanks,
  Bodhi

I think you’re invoking clang static analyzer (https://clang-analyzer.llvm.org
<https://clang-analyzer.llvm.org/> ) — a tool that is used to find bugs
and I don’t think it will affect the generated IR / machine code.

I think a better way to test different inline configurations will be generating
IR files using clang and play around with different `opt` (inlining) options.

-Min
> On Oct 20, 2021, at 10:15 AM, via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> 
> 
> Hi,
> 
>  I am trying to see the difference between different inlining options that
llvm supports (https://clang.llvm.org/docs/analyzer/developer-docs/IPA.html).
The way I invoked them was -
> 
>   clang++ -Xclang -analyzer-config -Xclang -ipa=dynamic -std=c++11 -Wall
something.cc -o something (for dynamic mode)
>   clang++ -Xclang -analyzer-config -Xclang -ipa=basic -std=c++11 -Wall
something.cc -o something (for basic mode)
> 
>   and so on.
> 
> However, I did't observe much difference in execution times for the
runs with different inlining modes, which is making me wonder if I did this
correctly? Is this the right way to use the different inlining modes? Can anyone
tell me if I am missing something?
> 
> 
> Thanks,
> Bodhi
> 
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> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
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