Optimizing: Clean up after HRor.

Change-Id: I96bd7fa2e8bdccb87a3380d063dad0dd57fed9d7
diff --git a/compiler/optimizing/code_generator_arm64.cc b/compiler/optimizing/code_generator_arm64.cc
index b7efbe3..5205830 100644
--- a/compiler/optimizing/code_generator_arm64.cc
+++ b/compiler/optimizing/code_generator_arm64.cc
@@ -4243,6 +4243,7 @@
 
     default:
       LOG(FATAL) << "Unexpected rem type " << type;
+      UNREACHABLE();
   }
 }
 
@@ -4317,6 +4318,7 @@
 
     default:
       LOG(FATAL) << "Unimplemented local type " << field_type;
+      UNREACHABLE();
   }
 }