diff --git a/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp b/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
index 4c2dbdd..c0c865e 100644
--- a/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
@@ -469,7 +469,7 @@
     return ValReg;
   case CCValAssign::AExt: {
     auto MIB = MIRBuilder.buildAnyExt(LocTy, ValReg);
-    return MIB->getOperand(0).getReg();
+    return MIB.getReg(0);
   }
   case CCValAssign::SExt: {
     Register NewReg = MRI.createGenericVirtualRegister(LocTy);