diff options
| -rw-r--r-- | lib/VMCore/Dominators.cpp | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/lib/VMCore/Dominators.cpp b/lib/VMCore/Dominators.cpp index 4d125fb022..35b2bbfc22 100644 --- a/lib/VMCore/Dominators.cpp +++ b/lib/VMCore/Dominators.cpp @@ -387,12 +387,12 @@ BasicBlock *DominatorTreeBase::findNearestCommonDominator(BasicBlock *A, DomTreeNode *NodeB = getNode(B); - // If B immediately dominates A then B is nearest common dominator. - if (NodeA->getIDom() == NodeB) + // If B dominates A then B is nearest common dominator. + if (dominates(B,A)) return B; - // If A immediately dominates B then A is nearest common dominator. - if (NodeB->getIDom() == NodeA) + // If A dominates B then A is nearest common dominator. + if (dominates(A,B)) return A; // Collect NodeA dominators set. @@ -404,10 +404,6 @@ BasicBlock *DominatorTreeBase::findNearestCommonDominator(BasicBlock *A, IDomA = IDomA->getIDom(); } - // If B dominates A then B is nearest common dominator. - if (NodeADoms.count(NodeB) != 0) - return B; - // Walk NodeB immediate dominators chain and find common dominator node. DomTreeNode *IDomB = NodeB->getIDom(); while(IDomB) { |