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

runtime/vm/intermediate_language_dbc.cc

Index: runtime/vm/intermediate_language_dbc.cc
diff --git a/runtime/vm/intermediate_language_dbc.cc b/runtime/vm/intermediate_language_dbc.cc
index 4e675296f48f63250bde9a11d461470d701a4e60..c79517e5b644099043413e62bfc9df0a430ef7c2 100644
--- a/runtime/vm/intermediate_language_dbc.cc
+++ b/runtime/vm/intermediate_language_dbc.cc
@@ -482,6 +482,26 @@ static void EmitBranchOnCondition(FlowGraphCompiler* compiler,
 }
 
 
+Condition SmiRangeComparisonInstr::GetNextInstructionCondition(
+    FlowGraphCompiler* compiler,
+    BranchLabels labels) {
+  return is_negated_ ? NEXT_IS_TRUE : NEXT_IS_FALSE;
+}
+
+
+Condition SmiRangeComparisonInstr::EmitComparisonCode(
+    FlowGraphCompiler* compiler,
+    BranchLabels labels) {
+  __ CheckClassIdRange(locs()->in(0).reg(),
+                       compiler->ToEmbeddableCid(from_, this));
+  __ Nop(__ AddConstant(Smi::Handle(Smi::New(to_ - from_))));
+  return is_negated_ ? NEXT_IS_TRUE : NEXT_IS_FALSE;
+}
+
+
+DEFINE_MAKE_LOCATION_SUMMARY(SmiRangeComparison, 1)
+
+
 Condition StrictCompareInstr::GetNextInstructionCondition(
     FlowGraphCompiler* compiler,
     BranchLabels labels) {