Support for mixed null/smi equality: do not deoptimize, emit same optimized code as if that was smi…

runtime/vm/intermediate_language.h

Index: runtime/vm/intermediate_language.h
===================================================================
--- runtime/vm/intermediate_language.h	(revision 13236)
+++ runtime/vm/intermediate_language.h	(working copy)
@@ -3811,12 +3811,12 @@
 class CheckClassInstr : public TemplateInstruction<1> {
  public:
   CheckClassInstr(Value* value,
-                  InstanceCallInstr* instance_call,
+                  intptr_t deopt_id,
                   const ICData& unary_checks)
       : unary_checks_(unary_checks) {
     ASSERT(value != NULL);
     inputs_[0] = value;
-    deopt_id_ = instance_call->deopt_id();
+    deopt_id_ = deopt_id;
   }
 
   DECLARE_INSTRUCTION(CheckClass)