cor3ntin wrote:

This seems fairly expensive while not actually doing anything to check 
lifeness. 

At the very minimum we need to limit it to pointer types. There are lots of 
types for which that would be false positives.

But ultimately maybe that check will be more effective when we can use CIR to 
remove the layers of c++ abstractions.

https://github.com/llvm/llvm-project/pull/156436
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