[llvm] [IPO] Added attributor for identifying invariant loads (PR #141800)

[Krzysztof Drewniak via llvm-commits]

krzysz00 wrote:

Said intrinsics are the ` llvm::isIntrinsicReturningPointerAliasingArgumentWithoutCapturing` s, and I suspect they might already be supported? But if they aren't, future work, yeah

https://github.com/llvm/llvm-project/pull/141800