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

runtime/vm/intermediate_language.cc

Index: runtime/vm/intermediate_language.cc
diff --git a/runtime/vm/intermediate_language.cc b/runtime/vm/intermediate_language.cc
index 68cf40125c2256810f757cb0aa8dc01ef8ffe21c..3ca5121f73ae308b0db390494e82cea2fa2bd0cf 100644
--- a/runtime/vm/intermediate_language.cc
+++ b/runtime/vm/intermediate_language.cc
@@ -3893,6 +3893,24 @@ ComparisonInstr* DoubleTestOpInstr::CopyWithNewOperands(Value* new_left,
 }
 
 
+ComparisonInstr* SmiRangeComparisonInstr::CopyWithNewOperands(
+    Value* new_left,
+    Value* new_right) {
+  UNREACHABLE();
+  return NULL;
+}
+
+
+bool SmiRangeComparisonInstr::AttributesEqual(Instruction* other) const {
+  SmiRangeComparisonInstr* other_check = other->AsSmiRangeComparison();
+  ASSERT(other_check != NULL);
+  if (!ComparisonInstr::AttributesEqual(other_check)) {
+    return false;
+  }
+  return from_ == other_check->from_ && to_ == other_check->to_;
+}
+
+
 ComparisonInstr* EqualityCompareInstr::CopyWithNewOperands(Value* new_left,
                                                            Value* new_right) {
   return new EqualityCompareInstr(token_pos(), kind(), new_left, new_right,