Transitioning to new IC structure: change IC data to include function name; pass IC data instead ...

runtime/vm/ic_data.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/ic_data.h"
+#include "vm/object.h"
+
+namespace dart {
+
+// ICData is a ValueObject, therefore 'data' need not be a ZoneObject.
+ICData::ICData(const Array& data) : data_(&data) {
+}
+
+
+ICData::ICData(const String& function_name, intptr_t num_args_checked)
+    : data_(NULL) {
+  // Array contains: function-name, num_checked, NULL check sentinel (classes,
+  // target).
+  const intptr_t len = kChecksStartIndex + (num_args_checked + 1);
+  data_ = &Array::ZoneHandle(Array::New(len, Heap::kOld));
+  data_->SetAt(kNameIndex, function_name);
+  data_->SetAt(kNumArgsCheckedIndex, Smi::Handle(Smi::New(num_args_checked)));
+}
+
+
+RawArray* ICData::data() const {
+  return data_->raw();
+}
+
+
+intptr_t ICData::ArrayElementsPerCheck() const {
+  // Number of checked classes + target.
+  return NumberOfArgumentsChecked() + 1;
+}
+
+
+intptr_t ICData::NumberOfArgumentsChecked() const {
+  Smi& result = Smi::Handle();
+  result ^= data_->At(kNumArgsCheckedIndex);
+  return result.Value();
+}
+
+
+intptr_t ICData::NumberOfChecks() const {
+  const intptr_t per_check = ArrayElementsPerCheck();
+  // Subtract function-name, num-checked and sentinel
+  intptr_t len = data_->Length() - kChecksStartIndex - per_check;
+  ASSERT(len % per_check == 0);
+  return len / per_check;
+}
+
+
+RawString* ICData::FunctionName() const {
+  String& result = String::Handle();
+  result ^= data_->At(kNameIndex);
+  return result.raw();
+}
+
+
+void ICData::AddCheck(const GrowableArray<const Class*>& classes,
+                      const Function& target) {
+  intptr_t old_number_of_checks = NumberOfChecks();
+  intptr_t new_len = data_->Length() + ArrayElementsPerCheck();
+  data_ = &Array::ZoneHandle(Array::Grow(*data_, new_len, Heap::kOld));
+  SetCheckAt(old_number_of_checks, classes, target);
+}
+
+
+void ICData::SetCheckAt(intptr_t index,
+                        const GrowableArray<const Class*>& classes,
+                        const Function& target) {
+  ASSERT((0 <= index) && (index < NumberOfChecks()));
+  intptr_t pos = kChecksStartIndex + ArrayElementsPerCheck() * index;
+  ASSERT(classes.length() == NumberOfArgumentsChecked());
+  for (intptr_t i = 0; i < classes.length(); i++) {
+    // Null is used as terminating object, do not add it.
+    ASSERT(!classes[i]->IsNull());
+    // Contract says that the class of null (NullClass) cannot be added.
+    ASSERT(!classes[i]->IsNullClass());
+    data_->SetAt(pos++, *(classes[i]));
+  }
+  ASSERT(!target.IsNull());
+  data_->SetAt(pos, target);
+}
+
+
+void ICData::GetCheckAt(intptr_t index,
+                        GrowableArray<const Class*>* classes,
+                        Function* target) const {
+  ASSERT(classes != NULL);
+  ASSERT(target != NULL);
+  ASSERT((0 <= index) && (index < NumberOfChecks()));
+  classes->Clear();
+  intptr_t pos = 1 + 1 + ArrayElementsPerCheck() * index;
+  for (intptr_t i = 0; i < NumberOfArgumentsChecked(); i++) {
+    Class& cls = Class::ZoneHandle();
+    cls ^= data_->At(pos++);
+    classes->Add(&cls);
+  }
+  (*target) ^= data_->At(pos);
+}
+
+}  // namespace dart