[llvm] [PowerPC] Exploit xxeval instruction for operations of the form ternary(A, X, nor(B,C)), ternary(A, X, eqv(B,C)), ternary(A, X, nand(B,C)), ternary(A, X, not(B)) and ternary(A, X, not(C)) (PR #158096)

[Tony Varghese via llvm-commits]

tonykuttai wrote:

@lei137 @amy-kwan @RolandF77 gentle ping. Thanks!

https://github.com/llvm/llvm-project/pull/158096