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/inliner.cc b/compiler/optimizing/inliner.cc
index 02a1acc..d550095 100644
--- a/compiler/optimizing/inliner.cc
+++ b/compiler/optimizing/inliner.cc
@@ -651,7 +651,8 @@
   HClassTableGet* class_table_get = new (graph_->GetArena()) HClassTableGet(
       receiver_class,
       type,
-      invoke_instruction->IsInvokeVirtual() ? HClassTableGet::kVTable : HClassTableGet::kIMTable,
+      invoke_instruction->IsInvokeVirtual() ? HClassTableGet::TableKind::kVTable
+                                            : HClassTableGet::TableKind::kIMTable,
       method_offset,
       invoke_instruction->GetDexPc());