[X86] Fold ADD(x,x) -> X86ISD::VSHLI(x,1)#161843

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

RKSimon:x86-fold-selfadd-shlRKSimon/llvm-project:x86-fold-selfadd-shlCopy head branch name to clipboard