Cleanup: Make CheckClassId instruction more general so it

runtime/vm/simulator_dbc.cc

Index: runtime/vm/simulator_dbc.cc
diff --git a/runtime/vm/simulator_dbc.cc b/runtime/vm/simulator_dbc.cc
index a85f26d7cf5f3f0078645e224c7cf2c80d91cec7..ad18d4e1356d2abfc89f06aa93f2544a3a1b9018 100644
--- a/runtime/vm/simulator_dbc.cc
+++ b/runtime/vm/simulator_dbc.cc
@@ -3254,6 +3254,18 @@ RawObject* Simulator::Call(const Code& code,
   }
 
   {
+    BYTECODE(CheckClassIdRange, A_D);
+    const intptr_t actual_cid =
+        reinterpret_cast<intptr_t>(FP[rA]) >> kSmiTagSize;
+    const uintptr_t cid_start = rD;
+    const uintptr_t cid_range = Bytecode::DecodeD(*pc);
+    // Unsigned comparison.  Skip either just the nop or both the nop and the
+    // following instruction.
+    pc += (actual_cid - cid_start <= cid_range) ? 2 : 1;
+    DISPATCH();
+  }
+
+  {
     BYTECODE(CheckBitTest, A_D);
     const intptr_t raw_value = reinterpret_cast<intptr_t>(FP[rA]);
     const bool is_smi = ((raw_value & kSmiTagMask) == kSmiTag);