[DAG] Reassociate (add (add X, Y), X) --> add(add(X, X), Y)#162242

RKSimon wants to merge 2 commits intollvm:mainllvm/llvm-project:mainfrom

RKSimon:dag-reassociate-selfaddRKSimon/llvm-project:dag-reassociate-selfaddCopy head branch name to clipboard