teresajohnson wrote:

This is an interesting idea, thanks for the performance numbers. It could also 
be useful for LTO without whole program visibility enabled, where most of the 
vtables and type tests will end up with public visibility making them 
ineligible for WPD. But I suspect it may not be profitable when there is any 
type of PGO, which will cause speculative devirtualization to be applied for 
profiled indirect calls via ICP. Can you share the detailed SPEC performance 
results?

https://github.com/llvm/llvm-project/pull/141777
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