[PATCH] D28236: InstCombine: Fold cos(-x) -> cos(x)

[Davide Italiano via Phabricator via llvm-commits]

davide added a comment.

`SimplifyLibCalls.cpp` does a similar transformation (`cos(-x) -> cos(x)`).
I think we should have the logic for this simplifications in a single place, if possible, so maybe there we should unconditionally lower libc `cos()` -> `llvm.cos` and simplify here?


https://reviews.llvm.org/D28236