// If the user is one of our immediate successors, and if that successor
// only has us as a predecessors (we'd have to split the critical edge
// otherwise), we can keep going.
- if (UserIsSuccessor && UserParent->getSinglePredecessor())
+ if (UserIsSuccessor && UserParent->getSinglePredecessor()) {
// Okay, the CFG is simple enough, try to sink this instruction.
- MadeIRChange |= TryToSinkInstruction(I, UserParent);
+ if (TryToSinkInstruction(I, UserParent)) {
+ MadeIRChange = true;
+ // We'll add uses of the sunk instruction below, but since sinking
+ // can expose opportunities for it's *operands* add them to the
+ // worklist
+ for (Use &U : I->operands())
+ if (Instruction *OpI = dyn_cast<Instruction>(U.get()))
+ Worklist.Add(OpI);
+ }
+ }
}
}