[llvm] [VPlan] Compute the cost for vector icmp and fcmp (PR #193268)

[David Sherwood via llvm-commits]

https://github.com/david-arm approved this pull request.

LGTM! I think this is a nice incremental improvement that doesn't regress the scalar cases, which can be fixed in a follow-on PR.

https://github.com/llvm/llvm-project/pull/193268