llvm-project

58f2c189 - [InstCombine] Fold shift of a constant into a reverse shift (#192982)

[InstCombine] Fold shift of a constant into a reverse shift (#192982) C1 << (C2 - X) -> (C1 << C2) >> X C1 << (C2 ^ X) -> (C1 << C2) >> X (if equivalent to the above) C1 >> (C2 - X) -> (C1 >> C2) << X (right shift modes match) C1 >> (C2 ^ X) -> (C1 >> C2) << X (if equivalent to the above) Proof: https://alive2.llvm.org/ce/z/q-4soi