Cleanup: Make CheckClassId instruction more general so it

runtime/vm/intermediate_language_ia32.cc

Index: runtime/vm/intermediate_language_ia32.cc
diff --git a/runtime/vm/intermediate_language_ia32.cc b/runtime/vm/intermediate_language_ia32.cc
index 967fb56d95a4b85d5e2db722ff141b9e0e2d0c5d..1e2ddc65dd5f592e8d6fc7952c229bbe3015016d 100644
--- a/runtime/vm/intermediate_language_ia32.cc
+++ b/runtime/vm/intermediate_language_ia32.cc
@@ -5927,7 +5927,8 @@ 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;
 }
 
@@ -5935,8 +5936,14 @@ LocationSummary* CheckClassIdInstr::MakeLocationSummary(Zone* zone,
 void CheckClassIdInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register value = locs()->in(0).reg();
   Label* deopt = compiler->AddDeoptStub(deopt_id(), ICData::kDeoptCheckClass);
-  __ cmpl(value, Immediate(Smi::RawValue(cid_)));
-  __ j(NOT_ZERO, deopt);
+  if (cids_.IsSingleCid()) {
+    __ cmpl(value, Immediate(Smi::RawValue(cids_.cid_start)));
+    __ j(NOT_ZERO, deopt);
+  } else {
+    __ AddImmediate(value, Immediate(-Smi::RawValue(cids_.cid_start)));
+    __ cmpl(value, Immediate(Smi::RawValue(cids_.Extent())));
+    __ j(ABOVE, deopt);
+  }
 }