Intrinsify String.charCodeAt, String.length and String.hashCode. Improves frog performance by 2x.

runtime/vm/opt_code_generator_ia32.cc

 // Copyright (c) 2011, 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/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/opt_code_generator.h"
 
 #include "vm/assembler_macros.h"
@@ skipping 129 matching lines @@
   Label* label() { return &label_; }
 
  private:
   const AstNode* node_;
   GrowableArray<Register> registers_;
   Label label_;
 
   DISALLOW_COPY_AND_ASSIGN(DeoptimizationBlob);
 };
 
+// TODO(srdjan): Add String_get:length, String_charCodeAt, String_hashCode.
 
 #define RECOGNIZED_LIST(V)                                                     \
   V(ObjectArray, get:length, ObjectArrayLength)                                \
   V(GrowableObjectArray, get:length, GrowableArrayLength)                      \
   V(IntegerImplementation, toDouble, IntegerToDouble)                          \
   V(Double, toDouble, DoubleToDouble)                                          \
   V(Math, sqrt, MathSqrt)                                                      \
 
 // Class that recognizes the name and owner of a function and returns the
 // corresponding enum. See RECOGNIZED_LIST above for list of recognizable
@@ skipping 2217 matching lines @@
   __ addl(ESP, Immediate(node->arguments()->length() * kWordSize));
   // Result is in EAX.
   if (IsResultNeeded(node)) {
     __ pushl(EAX);
   }
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32