10 // determining reachable blocks within a CFG.
128         // well be reachable via a different control flow, thus it's not dead.  in isDeadReturn()
318                               llvm::BitVector &Reachable,  in scanFromBlock()  argument
326   // The entry block may have already been marked reachable  in scanFromBlock()
328   if (!Reachable[Start->getBlockID()]) {  in scanFromBlock()
330     Reachable[Start->getBlockID()] = true;  in scanFromBlock()
335   // Find the reachable blocks from 'Start'.  in scanFromBlock()
339     // There are cases where we want to treat all successors as reachable.  in scanFromBlock()
344     // Look at the successors and mark then reachable.  in scanFromBlock()
372         if (!Reachable[blockID]) {  in scanFromBlock()
373           Reachable.set(blockID);  in scanFromBlock()
385                                             llvm::BitVector &Reachable) {  in scanMaybeReachableFromBlock()  argument
386   return scanFromBlock(Start, Reachable, &PP, true);  in scanMaybeReachableFromBlock()
396     llvm::BitVector &Reachable;  member in __anon5ae95f9f0111::DeadCodeScan
407     DeadCodeScan(llvm::BitVector &reachable, Preprocessor &PP, ASTContext &C)  in DeadCodeScan()  argument
408     : Visited(reachable.size()),  in DeadCodeScan()
409       Reachable(reachable),  in DeadCodeScan()
428   if (Reachable[blockID] || Visited[blockID])  in enqueue()
445       if (!Reachable[blockID]) {  in isDeadCodeRoot()
543     // It is possible that this block has been marked reachable after  in scanBackwards()
545     if (Reachable[Block->getBlockID()])  in scanBackwards()
563       count += scanMaybeReachableFromBlock(Block, PP, Reachable);  in scanBackwards()
569       count += scanMaybeReachableFromBlock(Block, PP, Reachable);  in scanBackwards()
585       if (Reachable[Block->getBlockID()])  in scanBackwards()
588       count += scanMaybeReachableFromBlock(Block, PP, Reachable);  in scanBackwards()
729                                 llvm::BitVector &Reachable) {  in ScanReachableFromBlock()  argument
730   return scanFromBlock(Start, Reachable, /* SourceManager* */ nullptr, false);  in ScanReachableFromBlock()
740   // Scan for reachable blocks from the entrance of the CFG.  in FindUnreachableCode()
742   llvm::BitVector reachable(cfg->getNumBlockIDs());  in FindUnreachableCode()  local
744     scanMaybeReachableFromBlock(&cfg->getEntry(), PP, reachable);  in FindUnreachableCode()
752       numReachable += scanMaybeReachableFromBlock(B, PP, reachable);  in FindUnreachableCode()
760     // A block may have been marked reachable during this loop.  in FindUnreachableCode()
761     if (reachable[block->getBlockID()])  in FindUnreachableCode()
764     DeadCodeScan DS(reachable, PP, AC.getASTContext());  in FindUnreachableCode()