[llvm] [LV]Split store-load forward distance analysis from other checks (PR #121156)

[Alexey Bataev via llvm-commits]

alexey-bataev wrote:

> Could you add a test case to the description that illustrates for what cases this will help eventually for EVL? Still struggling to connect the dots how this will be used eventually.

We already have the tests, see test/Transforms/LoopVectorize/RISCV/vectorize-force-tail-with-evl-safe-dep-distance.ll

https://github.com/llvm/llvm-project/pull/121156