+ ConstantClass *replaceOperandsInPlace(ArrayRef<Constant *> Operands,
+ ConstantClass *CP, Value *From,
+ Constant *To, unsigned NumUpdated = 0,
+ unsigned OperandNo = ~0u) {
+ LookupKey Lookup(CP->getType(), ValType(Operands, CP));
+ auto I = find(Lookup);
+ if (I != Map.end())
+ return I->first;
+
+ // Update to the new value. Optimize for the case when we have a single
+ // operand that we're changing, but handle bulk updates efficiently.
+ remove(CP);
+ if (NumUpdated == 1) {
+ assert(OperandNo < CP->getNumOperands() && "Invalid index");
+ assert(CP->getOperand(OperandNo) != To && "I didn't contain From!");
+ CP->setOperand(OperandNo, To);
+ } else {
+ for (unsigned I = 0, E = CP->getNumOperands(); I != E; ++I)
+ if (CP->getOperand(I) == From)
+ CP->setOperand(I, To);
+ }
+ insert(CP);
+ return nullptr;
+ }
+