[X86] combineAdd - use SDPatternMatch to simplify "(add (zext (vXi1 X)), Y) -> (sub Y, (sext (vXi1 X)))" matching.#140731

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

RKSimon:x86-combine-add-sdmatchRKSimon/llvm-project:x86-combine-add-sdmatchCopy head branch name to clipboard