assert(isa<PHINode>(Dest->begin()) &&
"This should only be called if Dest has a PHI!");
+ // Do not split edges to EH landing pads.
+ if (InvokeInst *Invoke = dyn_cast<InvokeInst>(TI)) {
+ if (Invoke->getSuccessor(1) == Dest)
+ return;
+ }
+
// As a hack, never split backedges of loops. Even though the copy for any
// PHIs inserted on the backedge would be dead for exits from the loop, we
// assume that the cost of *splitting* the backedge would be too high.