NormalizeArrayLen
GVN
GVN is actually on in release, and covers all the same things (or more), with `LowerSliceLen` changed to produce `PtrMetadata`.
Co-authored-by: Abdulaziz Ghuloum <aghuloum@gmail.com>
To reproduce the changes in this commit locally: - Run `./x test tidy` and remove all the output files not associated with a test file anymore, as reported by tidy. - Run `./x test tests/mir-opt --bless` to generate the new outputs.