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

[Nikita Popov via cfe-commits]

nikic wrote:

@artagnon You need to place the intrinsic in a code path that is not unconditionally executed on loop entry. (E.g. after early exit or abnormal exit.)

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