[AMDGPU][NewPM] Port SILowerWWMCopies to NPM#123695

optimisan merged 2 commits intomainllvm/llvm-project:mainfrom

users/Akshat-Oke/port-si-lower-wwm-copiesllvm/llvm-project:users/Akshat-Oke/port-si-lower-wwm-copiesCopy head branch name to clipboard