return MinSucc;
}
+static bool hasAddressTakenAndUsed(BasicBlock *BB) {
+ if (!BB->hasAddressTaken()) return false;
+
+ // If the block has its address taken, it may be a tree of dead constants
+ // hanging off of it. These shouldn't keep the block alive.
+ BlockAddress *BA = BlockAddress::get(BB);
+ BA->removeDeadConstantUsers();
+ return !BA->use_empty();
+}
+
/// ProcessBlock - If there are any predecessors whose control can be threaded
/// through to a successor, transform them now.
bool JumpThreading::ProcessBlock(BasicBlock *BB) {
// predecessors of our predecessor block.
if (BasicBlock *SinglePred = BB->getSinglePredecessor()) {
if (SinglePred->getTerminator()->getNumSuccessors() == 1 &&
- SinglePred != BB) {
+ SinglePred != BB && !hasAddressTakenAndUsed(BB)) {
// If SinglePred was a loop header, BB becomes one.
if (LoopHeaders.erase(SinglePred))
LoopHeaders.insert(BB);