diff options
| -rw-r--r-- | include/llvm/Analysis/Dominators.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/llvm/Analysis/Dominators.h b/include/llvm/Analysis/Dominators.h index 6ce3260..52171d7 100644 --- a/include/llvm/Analysis/Dominators.h +++ b/include/llvm/Analysis/Dominators.h @@ -944,6 +944,9 @@ public: // itself is not member of NewBB's dominance frontier. DominanceFrontier::iterator NewDFI = find(NewBB); DominanceFrontier::iterator DFI = find(BB); + // If BB was an entry block then its frontier is empty. + if (DFI == end()) + return; DominanceFrontier::DomSetType BBSet = DFI->second; for (DominanceFrontier::DomSetType::iterator BBSetI = BBSet.begin(), BBSetE = BBSet.end(); BBSetI != BBSetE; ++BBSetI) { |