[SCEV] Pass loop pred branch as context instruction to getMinTrailingZ.#160941

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

fhahn:perf/scev-ctxi-getconstantmultiplefhahn/llvm-project:perf/scev-ctxi-getconstantmultipleCopy head branch name to clipboard