Equality compare should record two arguments in IC data. INline double equality comparison.

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 "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/bootstrap.h"
@@ skipping 7172 matching lines @@
   const Array& data = Array::Handle(ic_data());
   intptr_t data_pos = index * TestEntryLength();
   Smi& smi = Smi::Handle();
   smi ^= data.At(data_pos);
   *class_id = smi.Value();
   *target ^= data.At(data_pos + 1);
 }
 
 
 intptr_t ICData::GetReceiverClassIdAt(intptr_t index) const {
+  ASSERT(index < NumberOfChecks());
   const Array& data = Array::Handle(ic_data());
   const intptr_t data_pos = index * TestEntryLength();
   Smi& smi = Smi::Handle();
   smi ^= data.At(data_pos);
   return smi.Value();
 }
 
 
 RawFunction* ICData::GetTargetAt(intptr_t index) const {
   const Array& data = Array::Handle(ic_data());
   const intptr_t data_pos = index * TestEntryLength() + num_args_tested();
   Function& target = Function::Handle();
   target ^= data.At(data_pos);
   return target.raw();
 }
 
 
 RawFunction* ICData::GetTargetForReceiverClassId(intptr_t class_id) const {
   for (intptr_t i = 0; i < NumberOfChecks(); i++) {
     if (GetReceiverClassIdAt(i) == class_id) {
       return GetTargetAt(i);
     }
   }
   return Function::null();
 }
 
 
+RawICData* ICData::AsUnaryClassChecks() const {
+  ASSERT(!IsNull());
+  ASSERT(num_args_tested() > 0);
+  if (num_args_tested() == 1) return raw();
+  const intptr_t kNumArgsTested = 1;
+  ICData& result = ICData::Handle(ICData::New(
+      Function::Handle(function()),
+      String::Handle(target_name()),
+      id(),
+      kNumArgsTested));
+  for (intptr_t i = 0; i < NumberOfChecks(); i++) {
+    const intptr_t class_id = GetReceiverClassIdAt(i);
+    intptr_t duplicate_class_id = -1;
+    for (intptr_t k = 0; k < result.NumberOfChecks(); k++) {
+      if (class_id == result.GetReceiverClassIdAt(k)) {
+        duplicate_class_id = k;
+        break;
+      }
+    }
+    if (duplicate_class_id >= 0) {
+      ASSERT(result.GetTargetAt(duplicate_class_id) == GetTargetAt(i));
+    } else {
+      // This will make sure that Smi is first if it exists.
+      result.AddReceiverCheck(class_id,
+                              Function::Handle(GetTargetAt(i)));
+    }
+  }
+  return result.raw();
+}
+
+
 RawICData* ICData::New(const Function& function,
                        const String& target_name,
                        intptr_t id,
                        intptr_t num_args_tested) {
   ASSERT(num_args_tested > 0);
   const Class& cls = Class::Handle(Object::icdata_class());
   ASSERT(!cls.IsNull());
   ICData& result = ICData::Handle();
   {
     // IC data objects are long living objects, allocate them in old generation.
@@ skipping 3481 matching lines @@
   const String& str = String::Handle(pattern());
   const char* format = "JSRegExp: pattern=%s flags=%s";
   intptr_t len = OS::SNPrint(NULL, 0, format, str.ToCString(), Flags());
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len + 1));
   OS::SNPrint(chars, (len + 1), format, str.ToCString(), Flags());
   return chars;
 }
 
 }  // namespace dart