[llvm-branch-commits] [llvm] [DataLayout][LangRef] Split non-integral and unstable pointer properties (PR #105735)

[Alexander Richardson via llvm-branch-commits]

arichardson wrote:

The downstream CHERI fork uses a `f` flag on the pointer spec ("fat pointer") to indentify CHERI capabilities. These have an additional property that partial copies are not possible since they would invalidate the result. I considered adding another flag to prevent splitting of loads/stores but this is not part of this commit. I imagine this property would also be useful for pointer schemes that use out-of-band metadata tables for pointers (e.g. Intel's no longer supported MPX or other similar schemes). Let me know if adding this would also be useful for any other downstreams.

https://github.com/llvm/llvm-project/pull/105735