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

runtime/vm/il_printer.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/il_printer.h"
 
 #include "vm/flow_graph_range_analysis.h"
 #include "vm/intermediate_language.h"
 #include "vm/os.h"
 #include "vm/parser.h"
@@ skipping 1052 matching lines @@
   right()->PrintTo(f);
 }
 
 
 void UnaryDoubleOpInstr::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s, ", Token::Str(op_kind()));
   value()->PrintTo(f);
 }
 
 
+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);
 
   const Class& cls =
       Class::Handle(Isolate::Current()->class_table()->At(cids().cid_start));
   const String& name = String::Handle(cls.ScrubbedName());
   if (cids().IsSingleCid()) {
     f->Print(", %s", name.ToCString());
   } else {
     const Class& cls2 =
@@ skipping 330 matching lines @@
 }
 
 
 bool FlowGraphPrinter::ShouldPrint(const Function& function) {
   return false;
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart