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Dynamic loading of custom passes in wasm-opt #6548

@loganek

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@loganek

Hi,
I created my own pass that instruments all the malloc/calloc/realloc/free calls in the WASM binary so I can very precisely track the heap memory usage. I don't think my usecase is generic enough to include the pass in the upstream wasm-opt (although I wouldn't mind doing that if maintainers are happy to accept it), so I thought I'll compile it as DSO library and load it dynamically.

I realized that wasm-opt doesn't have an option to dynamically load passes from DSOs; was that functionality ever considered and/or is there a plan to add such feature?

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