[InstCombine] Refactor the code for folding logicop and sext/zext. NFC.#137132

tclin914 merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

tclin914:refactor-folding-logicop-casttclin914/llvm-project:refactor-folding-logicop-castCopy head branch name to clipboard