[llvm] [IR] Add @llvm.structured.alloca (PR #186811)

[Nathan Gauër via llvm-commits]

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Keenuts wrote:


I'm wondering if it wouldn't even be possible to do IntrNoMem?
After all, the alloca we get here is not supposed to collide with any other memory allocation, so the alloca itself doesn't write/read memory, only the load/store associated with it



https://github.com/llvm/llvm-project/pull/186811