Add new api replaceAllTypeDependentUsesWith

Author: meg-gupta

include/swift/SIL/SILValue.h

@@ -377,6 +377,8 @@ class ValueBase : public SILNode, public SILAllocated<ValueBase> {
   /// same type as the result of this instruction.
   void replaceAllUsesWithUndef();
 
+  void replaceAllTypeDependentUsesWith(ValueBase *RHS);
+
   /// Is this value a direct result of the given instruction?
   bool isResultOf(SILInstruction *I) const;
 

lib/SIL/IR/SILValue.cpp

@@ -65,6 +65,13 @@ void ValueBase::replaceAllUsesWithUndef() {
   }
 }
 
+void ValueBase::replaceAllTypeDependentUsesWith(ValueBase *RHS) {
+  SmallVector<Operand *, 4> typeUses(getTypeDependentUses());
+  for (Operand *use : typeUses) {
+    use->set(RHS);
+  }
+}
+
 SILInstruction *ValueBase::getDefiningInstruction() {
   if (auto *inst = dyn_cast<SingleValueInstruction>(this))
     return inst;

lib/SILOptimizer/Mandatory/AddressLowering.cpp

@@ -2625,15 +2625,7 @@ void UseRewriter::visitOpenExistentialValueInst(
       openExistential->getType().getAddressType(),
       OpenedExistentialAccess::Immutable);
 
-  SmallVector<Operand *, 4> typeUses;
-  for (Operand *use : openExistential->getUses()) {
-    if (use->isTypeDependent()) {
-      typeUses.push_back(use);
-    }
-  }
-  for (Operand *use : typeUses) {
-    use->set(openAddr);
-  }
+  openExistential->replaceAllTypeDependentUsesWith(openAddr);
   markRewritten(openExistential, openAddr);
 }