[llvm] [InstCombine] Make backedge check in op of phi transform more precise (PR #106075)

[Mikael Holmén via llvm-commits]

mikaelholmen wrote:

Thanks! And sorry for the noise.
I'll just write a new issue about this with your reproducer then. (Good that someone has pro reduction skills!)

The reduced problem seems to appear sometime feb/march 2022 so seems to be old.


https://github.com/llvm/llvm-project/pull/106075