http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-
20070416/047971.html
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36236
91177308-0d34-0410-b5e6-
96231b3b80d8
for (pred_iterator SI = pred_begin(BB), SE = pred_end(BB);
SI != SE; ++SI)
// Does Node immediately dominate this predecessor?
- if (DT[*SI]->getIDom() != Node)
+ if (DT[*SI] && DT[*SI]->getIDom() != Node)
S.insert(*SI);
// At this point, S is DFlocal. Now we union in DFup's of our children...