[llvm-dev] Strip IR metadata information in a unit test

[Philip Reames via llvm-dev]

See llvm-reduce.

Philip

On 11/18/21 9:14 AM, Mingming Liu via llvm-dev wrote:
> Hi,
>
>     When modifying IR for the purpose of a unit test (e.g., in 
> https://github.com/llvm/llvm-project/tree/main/llvm/test/Transforms/SROA 
> <https://github.com/llvm/llvm-project/tree/main/llvm/test/Transforms/SROA>), 
> the IR generated by OPT may have metadata that's not used by the 
> tested pass.
>
>     Are there some general suggestions on how to strip metadata? Is 
> this mostly empirical by analyzing how the metadata takes effect in 
> the e2e compiling process (i.e., outside of one pass)? Any form of 
> pointers / related threads in the past would be enlightening!
>
>      From this perspective stripping unused metadata manually could be 
> error prone (e.g., for a more complex IR, or a test IR consisting of 
> 10+ functions).
>
> -- 
> Thanks,
> Mingming
>
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