[AMDGPU] Try to reuse register with the constant from compare in v_cndmask#148740

dfukalov merged 2 commits intollvm:mainllvm/llvm-project:mainfrom

dfukalov:cmp-select-reuse-reg-with-constdfukalov/llvm-project:cmp-select-reuse-reg-with-constCopy head branch name to clipboard