Cleanup: Make CheckClassId instruction more general so it

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 5c5b274c139ff753038701f99c2aebe58a99b04c..1fed7d8065230af2f5c70740865a0316ca1d3399 100644
--- a/runtime/vm/intermediate_language_arm64.cc
+++ b/runtime/vm/intermediate_language_arm64.cc
@@ -5559,7 +5559,8 @@ LocationSummary* CheckClassIdInstr::MakeLocationSummary(Zone* zone,
   const intptr_t kNumTemps = 0;
   LocationSummary* summary = new (zone)
       LocationSummary(zone, kNumInputs, kNumTemps, LocationSummary::kNoCall);
-  summary->set_in(0, Location::RequiresRegister());
+  summary->set_in(0, cids_.IsSingleCid() ? Location::RequiresRegister()
+                                         : Location::WritableRegister());
   return summary;
 }
 
@@ -5567,8 +5568,14 @@ LocationSummary* CheckClassIdInstr::MakeLocationSummary(Zone* zone,
 void CheckClassIdInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register value = locs()->in(0).reg();
   Label* deopt = compiler->AddDeoptStub(deopt_id(), ICData::kDeoptCheckClass);
-  __ CompareImmediate(value, Smi::RawValue(cid_));
-  __ b(deopt, NE);
+  if (cids_.IsSingleCid()) {
+    __ CompareImmediate(value, Smi::RawValue(cids_.cid_start));
+    __ b(deopt, NE);
+  } else {
+    __ AddImmediate(value, -Smi::RawValue(cids_.cid_start));
+    __ CompareImmediate(value, Smi::RawValue(cids_.cid_end - cids_.cid_start));
+    __ b(deopt, HI);  // Unsigned higher.
+  }
 }