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 06c483dec102ccc091e35d5e0988ac27a1063eb0..19f4e6c02186b3c011d591d14a5805a958dfedf2 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(to_ - from_);
+  return is_negated() ? NEXT_IS_TRUE : NEXT_IS_FALSE;
+}
+
+
+DEFINE_MAKE_LOCATION_SUMMARY(SmiRangeComparison, 1)
+
+
 Condition StrictCompareInstr::GetNextInstructionCondition(
     FlowGraphCompiler* compiler,
     BranchLabels labels) {