Xazax-hun wrote:

Thanks! 

I have one more question. So we need the reverse post order property of the CFG 
to ensure that we visit everything in the right order. The only reason why I am 
a bit unsure here, is because I wonder if it can ever cause some trouble that 
the RAV visiting the subexpressions is crossing a basic block boundary and 
venturing into that block too early, before all of its predecessors have been 
visited. 

If this cannot happen, I think the current approach should be fine. 

https://github.com/llvm/llvm-project/pull/153661
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