[llvm] [LV][NFC] Add another case to cast-costs.ll test (PR #201117)

[David Sherwood via llvm-commits]

david-arm wrote:

Hi @fhahn, following up on your comment from https://github.com/llvm/llvm-project/pull/200135 about adding a replicate test. The only test I could find in your PR #140623 that I could use is from llvm/test/Transforms/LoopVectorize/VPlan/RISCV/vplan-riscv-vector-reverse.ll. I had to modify the update_analyze_test_checks.py script to also look for CLONE recipes, which will change in #140623 to EMIT-SCALAR.

https://github.com/llvm/llvm-project/pull/201117