[llvm] ISel/AArch64: custom lower vector ISD::[L]LRINT (PR #89035)

[David Green via llvm-commits]

https://github.com/davemgreen commented:

It is a shame about using FP_TO_SI_SAT and it scalarizing as a result, but we will have to fix that separately in any case. Some of the tests are missing check lines, but otherwise I think this looks OK

https://github.com/llvm/llvm-project/pull/89035