Optimizing: Reduce memory usage of HInstructions.

Pack narrow fields and flags into a single 32-bit field.

Change-Id: Ib2f7abf987caee0339018d21f0d498f8db63542d
diff --git a/compiler/optimizing/code_generator_arm64.cc b/compiler/optimizing/code_generator_arm64.cc
index beb75f0..c27209f 100644
--- a/compiler/optimizing/code_generator_arm64.cc
+++ b/compiler/optimizing/code_generator_arm64.cc
@@ -5030,7 +5030,7 @@
 void InstructionCodeGeneratorARM64::VisitClassTableGet(HClassTableGet* instruction) {
   LocationSummary* locations = instruction->GetLocations();
   uint32_t method_offset = 0;
-  if (instruction->GetTableKind() == HClassTableGet::kVTable) {
+  if (instruction->GetTableKind() == HClassTableGet::TableKind::kVTable) {
     method_offset = mirror::Class::EmbeddedVTableEntryOffset(
         instruction->GetIndex(), kArm64PointerSize).SizeValue();
   } else {