[RISCV] Reverse (add x, (zext c)) back to (select c, (add x, 1), x)#87236

lukel97 wants to merge 4 commits intollvm:mainllvm/llvm-project:mainfrom

lukel97:zext-binop-to-selectlukel97/llvm-project:zext-binop-to-selectCopy head branch name to clipboard