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

runtime/vm/intermediate_language.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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 1834 matching lines @@
   }
 }
 
 
 LocationSummary* StaticCallInstr::MakeLocationSummary() const {
   return MakeCallSummary();
 }
 
 
 void StaticCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
+  Label skip_call;
+  const String& equality_name = String::Handle(Symbols::New("=="));

[hausner, 2012/10/22 20:00:29]

Ditto regarding using a symbol.

+  if (function().name() == equality_name.raw()) {
+    compiler->EmitSuperEqualityCallPrologue(locs()->out().reg(), &skip_call);
+  }
   compiler->GenerateStaticCall(deopt_id(),
                                token_pos(),
                                function(),
                                ArgumentCount(),
                                argument_names(),
                                locs());
+  __ Bind(&skip_call);
 }
 
 
 void AssertAssignableInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   if (!is_eliminated()) {
     compiler->GenerateAssertAssignable(token_pos(),
                                        dst_type(),
                                        dst_name(),
                                        locs());
   }
@@ skipping 339 matching lines @@
     new_max = new_max.Clamp();
   }
 
   return Range::Update(&range_, new_min, new_max);
 }
 
 
 #undef __
 
 }  // namespace dart