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

runtime/vm/intermediate_language_arm64.cc

Index: runtime/vm/intermediate_language_arm64.cc
diff --git a/runtime/vm/intermediate_language_arm64.cc b/runtime/vm/intermediate_language_arm64.cc
index 2e53e4458b22f3b23835da759c79f951bfe8f166..4db696150a4f47050c168ae960f4bf8122e7fe64 100644
--- a/runtime/vm/intermediate_language_arm64.cc
+++ b/runtime/vm/intermediate_language_arm64.cc
@@ -5829,6 +5829,27 @@ void IndirectGotoInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
 }
 
 
+LocationSummary* SmiRangeComparisonInstr::MakeLocationSummary(Zone* zone,
+                                                              bool opt) const {
+  const intptr_t kNumInputs = 1;
+  const intptr_t kNumTemps = 0;
+  LocationSummary* locs = new (zone)
+      LocationSummary(zone, kNumInputs, kNumTemps, LocationSummary::kNoCall);
+  locs->set_in(0, Location::RequiresRegister());
+  return locs;
+}
+
+
+Condition SmiRangeComparisonInstr::EmitComparisonCode(
+    FlowGraphCompiler* compiler,
+    BranchLabels labels) {
+  Register in = locs()->in(0).reg();
+  __ sub(TMP, in, Operand(Smi::RawValue(from_)));
+  __ cmp(TMP, Operand(Smi::RawValue(to_ - from_)));
+  return is_negated() ? HI : LS;
+}
+
+
 LocationSummary* StrictCompareInstr::MakeLocationSummary(Zone* zone,
                                                          bool opt) const {
   const intptr_t kNumInputs = 2;