[llvm] [LV] Invalidate SCEV values in the scalar loop after loop vectorization (PR #69886)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

Looks like it doesn't have an impact on the compile time.
https://llvm-compile-time-tracker.com/compare.php?from=3d40411ee88958864316ff9afb23ec2d0166b285&to=72b287aca006db378d0d8c81c0401edd9a6563d5&stat=instructions

https://github.com/llvm/llvm-project/pull/69886