[SCEV] Use context instruction for SCEVUnknowns in getConstantMultiple.#163260

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

fhahn:scev-more-ctx-for-scevunknownfhahn/llvm-project:scev-more-ctx-for-scevunknownCopy head branch name to clipboard