[llvm-commits] [llvm] r52437 - /llvm/trunk/include/llvm/Analysis/Dominators.h

[Devang Patel]

Author: dpatel
Date: Tue Jun 17 21:12:09 2008
New Revision: 52437

URL: http://llvm.org/viewvc/llvm-project?rev=52437&view=rev
Log:
Check empty dominance frontier.

Modified:
    llvm/trunk/include/llvm/Analysis/Dominators.h

Modified: llvm/trunk/include/llvm/Analysis/Dominators.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Analysis/Dominators.h?rev=52437&r1=52436&r2=52437&view=diff

==============================================================================
--- llvm/trunk/include/llvm/Analysis/Dominators.h (original)
+++ llvm/trunk/include/llvm/Analysis/Dominators.h Tue Jun 17 21:12:09 2008
@@ -944,6 +944,9 @@
     // 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) {