[llvm] [LV] Implement integer part of VPDerivedIV cost model (PR #198252)

[Vladimir Vereschaka via llvm-commits]

vvereschaka wrote:

Hi @david-arm ,

these changes also break the `Transforms/LoopVectorize/ARM/mve-reg-pressure-spills.ll` test on ARMv7 builder
https://lab.llvm.org/buildbot/#/builders/38/builds/9160

I tried to revert these changes locally and it fixed the test.

Would you take care of it?

https://github.com/llvm/llvm-project/pull/198252