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

[Mingming Liu via llvm-dev]

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),
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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