[SSAUpdater] Only iterate blocks modified by CheckIfPHIMatches() in RecordMatchingPHIs()#153596

Enna1 merged 1 commit intomainllvm/llvm-project:mainfrom

users/Enna1/NFC-SSAUpdater-RecordMatchingPHIsllvm/llvm-project:users/Enna1/NFC-SSAUpdater-RecordMatchingPHIsCopy head branch name to clipboard