[libcxx-commits] [libcxx] [libc++] Add an ABI setting to harden unique_ptr<T[]>::operator[] (PR #91798)

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EricWF wrote:

A couple of things I would like us to investigate:

1. Can we stash the size before the the array we allocate?
2. What effect does this have on unique_ptr being passed in registers?



https://github.com/llvm/llvm-project/pull/91798