Fix super ==: Test first for null before call inf super ==.

runtime/vm/flow_graph_inliner.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/flow_graph_inliner.h"
 
 #include "vm/compiler.h"
 #include "vm/flags.h"
 #include "vm/flow_graph.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 131 matching lines @@
 
   void VisitClosureCall(ClosureCallInstr* call) {
     closure_calls_.Add(call);
   }
 
   void VisitPolymorphicInstanceCall(PolymorphicInstanceCallInstr* call) {
     instance_calls_.Add(call);
   }
 
   void VisitStaticCall(StaticCallInstr* call) {
-    if (call->function().is_inlinable()) static_calls_.Add(call);
+    if (call->function().IsInlineable()) static_calls_.Add(call);
   }
 
  private:
   GrowableArray<StaticCallInstr*> static_calls_;
   GrowableArray<ClosureCallInstr*> closure_calls_;
   GrowableArray<PolymorphicInstanceCallInstr*> instance_calls_;
 
   DISALLOW_COPY_AND_ASSIGN(CallSites);
 };
 
@@ skipping 49 matching lines @@
 
  private:
   bool TryInlining(const Function& function,
                    GrowableArray<Value*>* arguments,
                    Definition* call) {
     TRACE_INLINING(OS::Print("  => %s (deopt count %d)\n",
                              function.ToCString(),
                              function.deoptimization_counter()));
 
     // Abort if the inlinable bit on the function is low.
-    if (!function.is_inlinable()) {
+    if (!function.IsInlineable()) {
       TRACE_INLINING(OS::Print("     Bailout: not inlinable\n"));
       return false;
     }
 
     // Abort if the callee has optional parameters.
     if (function.HasOptionalParameters()) {
       TRACE_INLINING(OS::Print("     Bailout: optional parameters\n"));
       return false;
     }
 
@@ skipping 272 matching lines @@
         OS::Print("After Inlining of %s\n", flow_graph_->
                   parsed_function().function().ToFullyQualifiedCString());
         FlowGraphPrinter printer(*flow_graph_);
         printer.PrintBlocks();
       }
     }
   }
 }
 
 }  // namespace dart