Refactoring InterfaceDescriptors away from code-stubs.h

src/interface-descriptors.cc

+// Copyright 2012 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/v8.h"
+
+#include "src/interface-descriptors.h"
+
+namespace v8 {
+namespace internal {
+
+InterfaceDescriptor::InterfaceDescriptor() : register_param_count_(-1) {}
+
+
+void InterfaceDescriptor::Initialize(
+    int register_parameter_count, Register* registers,
+    Representation* register_param_representations,
+    PlatformInterfaceDescriptor* platform_descriptor) {
+  platform_specific_descriptor_ = platform_descriptor;
+  register_param_count_ = register_parameter_count;
+
+  // An interface descriptor must have a context register.
+  DCHECK(register_parameter_count > 0 && registers[0].is(ContextRegister()));
+
+  // InterfaceDescriptor owns a copy of the registers array.
+  register_params_.Reset(NewArray<Register>(register_parameter_count));
+  for (int i = 0; i < register_parameter_count; i++) {
+    register_params_[i] = registers[i];
+  }
+
+  // If a representations array is specified, then the descriptor owns that as
+  // well.
+  if (register_param_representations != NULL) {
+    register_param_representations_.Reset(
+        NewArray<Representation>(register_parameter_count));
+    for (int i = 0; i < register_parameter_count; i++) {
+      // If there is a context register, the representation must be tagged.
+      DCHECK(
+          i != 0 ||
+          register_param_representations[i].Equals(Representation::Tagged()));
+      register_param_representations_[i] = register_param_representations[i];
+    }
+  }
+}
+
+
+void CallInterfaceDescriptor::Initialize(
+    int register_parameter_count, Register* registers,
+    Representation* param_representations,
+    PlatformInterfaceDescriptor* platform_descriptor) {
+  InterfaceDescriptor::Initialize(register_parameter_count, registers,
+                                  param_representations, platform_descriptor);
+}
+}
+}  // namespace v8::internal