diff --git a/compiler/optimizing/code_generator_arm.cc b/compiler/optimizing/code_generator_arm.cc
index 27691ac..6e528f9 100644
--- a/compiler/optimizing/code_generator_arm.cc
+++ b/compiler/optimizing/code_generator_arm.cc
@@ -447,7 +447,7 @@
   locations->AddTemp(ArmCoreLocation(R0));
 
   InvokeDexCallingConventionVisitor calling_convention_visitor;
-  for (int i = 0; i < invoke->InputCount(); i++) {
+  for (size_t i = 0; i < invoke->InputCount(); i++) {
     HInstruction* input = invoke->InputAt(i);
     locations->SetInAt(i, calling_convention_visitor.GetNextLocation(input->GetType()));
   }
@@ -694,5 +694,13 @@
          locations->InAt(0).AsArm().AsCoreRegister(), ShifterOperand(1));
 }
 
+void LocationsBuilderARM::VisitPhi(HPhi* instruction) {
+  LOG(FATAL) << "Unimplemented";
+}
+
+void InstructionCodeGeneratorARM::VisitPhi(HPhi* instruction) {
+  LOG(FATAL) << "Unimplemented";
+}
+
 }  // namespace arm
 }  // namespace art