AOT: Enable branch merging for checked smi comparisons

runtime/vm/il_printer.cc

Index: runtime/vm/il_printer.cc
diff --git a/runtime/vm/il_printer.cc b/runtime/vm/il_printer.cc
index 7a6874f71f620dd5d6f7bb9fce3945afb6cfdb7b..015156397584a9d68119bb29791248415ee555f5 100644
--- a/runtime/vm/il_printer.cc
+++ b/runtime/vm/il_printer.cc
@@ -704,6 +704,15 @@ void CheckedSmiOpInstr::PrintOperandsTo(BufferFormatter* f) const {
 }
 
 
+void CheckedSmiComparisonInstr::PrintOperandsTo(BufferFormatter* f) const {
+  f->Print("%s", Token::Str(kind()));
+  f->Print(", ");
+  left()->PrintTo(f);
+  f->Print(", ");
+  right()->PrintTo(f);
+}
+
+
 void BinaryIntegerOpInstr::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s", Token::Str(op_kind()));
   if (is_truncating()) {