[clang] [llvm] [IR] Mark vector intrinsics speculatable (PR #162334)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

Would be good to test this with a case where we hoist a speculative vector intrinsic (and not hoist the remainder/division

https://github.com/llvm/llvm-project/pull/162334