Index: lib/Target/ARM64/ARM64AddressTypePromotion.cpp
===================================================================
--- lib/Target/ARM64/ARM64AddressTypePromotion.cpp
+++ lib/Target/ARM64/ARM64AddressTypePromotion.cpp
@@ -216,7 +216,7 @@
     return false;
 
   for (const Use &U : SExt->uses()) {
-    if (isa<GetElementPtrInst>(*U))
+    if (isa<GetElementPtrInst>(U.getUser()))
       return true;
   }
 
@@ -287,7 +287,7 @@
         // been moved yet.
         while (!Inst->use_empty()) {
           Value::use_iterator UseIt = Inst->use_begin();
-          Instruction *UseInst = dyn_cast<Instruction>(*UseIt);
+          Instruction *UseInst = dyn_cast<Instruction>(UseIt->getUser());
           assert(UseInst && "Use of sext is not an Instruction!");
           UseInst->setOperand(UseIt->getOperandNo(), SExt);
         }
@@ -438,7 +438,7 @@
       bool insert = false;
       // #1.
       for (const Use &U : SExt->uses()) {
-        const Instruction *Inst = dyn_cast<GetElementPtrInst>(U);
+        const Instruction *Inst = dyn_cast<GetElementPtrInst>(U.getUser());
         if (Inst && Inst->getNumOperands() > 2) {
           DEBUG(dbgs() << "Interesting use in GetElementPtrInst\n" << *Inst
                        << '\n');