VM-codegen: Add IL instruction to check if a Smi is in a constant range

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 653d564e6a8feb722191aa3a05cbafd76556c4ea..dcbcb6ebbaa711c331637f6b1f81977473f8cba8 100644
--- a/runtime/vm/il_printer.cc
+++ b/runtime/vm/il_printer.cc
@@ -1070,6 +1070,22 @@ void UnaryDoubleOpInstr::PrintOperandsTo(BufferFormatter* f) const {
 }
 
 
+void SmiRangeComparisonInstr::PrintOperandsTo(BufferFormatter* f) const {
+  // This is currently only used for tests on Cids, so we print the range of
+  // cids as class names, too.
+  const Class& from_cls =
+      Class::Handle(Isolate::Current()->class_table()->At(from_));
+  const String& from_name = String::Handle(from_cls.ScrubbedName());
+  const Class& to_cls =
+      Class::Handle(Isolate::Current()->class_table()->At(to_));
+  const String& to_name = String::Handle(to_cls.ScrubbedName());
+  f->Print(" (/*%s*/ %" Pd " <= ", from_name.ToCString(), from_);
+  input()->PrintTo(f);
+  f->Print(" <= %" Pd " /*%s*/) ? %s : %s", to_, to_name.ToCString(),
+           is_negated_ ? "false" : "true", is_negated_ ? "true" : "false");
+}
+
+
 void CheckClassIdInstr::PrintOperandsTo(BufferFormatter* f) const {
   value()->PrintTo(f);