SmallVector<ReturnInst*,16> Returns;
SmallVector<UnwindInst*,16> Unwinds;
SmallVector<InvokeInst*,16> Invokes;
- SmallVector<UnreachableInst*, 16> Unreachables;
+ UnreachableInst* UnreachablePlaceholder = 0;
for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
if (ReturnInst *RI = dyn_cast<ReturnInst>(BB->getTerminator())) {
// for a standard call). We insert an unreachable instruction here and
// modify the block to jump to the correct unwinding pad later.
BasicBlock *UnwindBB = BasicBlock::Create(F.getContext(), "unwindbb", &F);
- Unreachables.push_back(new UnreachableInst(F.getContext(), UnwindBB));
+ UnreachablePlaceholder = new UnreachableInst(F.getContext(), UnwindBB);
Value *CatchLoad = new LoadInst(InvokeNum, "invoke.num", true, CatchBB);
SwitchInst *CatchSwitch =
Unwinds[i]->eraseFromParent();
}
- // Replace all inserted unreachables with a branch to the unwind handler.
- for (unsigned i = 0, e = Unreachables.size(); i != e; ++i) {
- BranchInst::Create(UnwindHandler, Unreachables[i]);
- Unreachables[i]->eraseFromParent();
+ // Replace the inserted unreachable with a branch to the unwind handler.
+ if (UnreachablePlaceholder) {
+ BranchInst::Create(UnwindHandler, UnreachablePlaceholder);
+ UnreachablePlaceholder->eraseFromParent();
}
// Finally, for any returns from this function, if this function contains an