Closure call inlining for constant closures.

runtime/vm/object.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/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 6415 matching lines @@
 RawString* Function::GetSource() {
   const Script& func_script = Script::Handle(script());
   // Without the + 1 the final "}" is not included.
   return func_script.GetSnippet(token_pos(), end_token_pos() + 1);
 }
 
 
 // Construct fingerprint from token stream. The token stream contains also
 // arguments.
 int32_t Function::SourceFingerprint() const {
-  uint32_t result = String::Handle(Signature()).Hash();
+  uint32_t result = IsImplicitClosureFunction()
+      ? String::Handle(Function::Handle(parent_function()).Signature()).Hash()
+      : String::Handle(Signature()).Hash();
   TokenStream::Iterator tokens_iterator(TokenStream::Handle(
       Script::Handle(script()).tokens()), token_pos());
   Object& obj = Object::Handle();
   String& literal = String::Handle();
   while (tokens_iterator.CurrentPosition() < end_token_pos()) {
     uint32_t val = 0;
     obj = tokens_iterator.CurrentToken();
     if (obj.IsSmi()) {
       val = Smi::Cast(obj).Value();
     } else {
@@ skipping 12588 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart