Don't perform OSR on intrinsified methods.

runtime/vm/intrinsifier.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.
 // Class for intrinsifying functions.
 
 #include "vm/assembler.h"
 #include "vm/intrinsifier.h"
 #include "vm/flags.h"
 #include "vm/object.h"
 #include "vm/symbols.h"
@@ skipping 162 matching lines @@
 }
 
 
 void Intrinsifier::Intrinsify(ParsedFunction* parsed_function,
                               FlowGraphCompiler* compiler) {
   const Function& function = parsed_function->function();
   if (!CanIntrinsify(function)) {
     return;
   }
 
+  ASSERT(!compiler->flow_graph().IsCompiledForOsr());
   if (GraphIntrinsify(parsed_function, compiler)) {
     return;
   }
 
 #define EMIT_CASE(test_class_name, test_function_name, enum_name, fp)          \
     case MethodRecognizer::k##enum_name:                                       \
       ASSERT(function.CheckSourceFingerprint(fp));                             \
       compiler->assembler()->Comment("Intrinsic");                             \
       enum_name(compiler->assembler());                                        \
       break;
@@ skipping 364 matching lines @@
       new LoadFieldInstr(new Value(backing_store),
                          Array::length_offset(),
                          Type::ZoneHandle(),
                          builder.TokenPos()));
   builder.AddIntrinsicReturn(new Value(capacity));
   return true;
 }
 
 
 }  // namespace dart