[SimplifyCFG] Avoid branch threading of divergent conditionals#141867

AlexMaclean wants to merge 2 commits intollvm:mainllvm/llvm-project:mainfrom

AlexMaclean:dev/amaclean/upstream/simplify-cfg-divAlexMaclean/llvm-project:dev/amaclean/upstream/simplify-cfg-divCopy head branch name to clipboard