BasicBlock *TIBB = TI->getParent();
BasicBlock *DestBB = TI->getSuccessor(SuccNum);
+ // Splitting the critical edge to a landing pad block is non-trivial. Don't do
+ // it in this generic function.
+ assert(!DestBB->isLandingPad() &&
+ "Cannot split critical edge to a landing pad block!");
+
// Create a new basic block, linking it into the CFG.
BasicBlock *NewBB = BasicBlock::Create(TI->getContext(),
TIBB->getName() + "." + DestBB->getName() + "_crit_edge");
}
// For each unique exit block...
+ // FIXME: This code is functionally equivalent to the corresponding
+ // loop in LoopSimplify.
SmallVector<BasicBlock *, 4> ExitBlocks;
TIL->getExitBlocks(ExitBlocks);
for (unsigned i = 0, e = ExitBlocks.size(); i != e; ++i) {
for (pred_iterator I = pred_begin(Exit), E = pred_end(Exit);
I != E; ++I) {
BasicBlock *P = *I;
- if (TIL->contains(P))
+ if (TIL->contains(P)) {
+ if (isa<IndirectBrInst>(P->getTerminator())) {
+ Preds.clear();
+ break;
+ }
Preds.push_back(P);
- else
+ } else {
HasPredOutsideOfLoop = true;
+ }
}
// If there are any preds not in the loop, we'll need to split
// the edges. The Preds.empty() check is needed because a block