Initialize CodeStubInterfaceDescriptor in the constructor.

src/code-stubs-hydrogen.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/code-stubs.h"
 #include "src/field-index.h"
 #include "src/hydrogen.h"
 #include "src/lithium.h"
@@ skipping 19 matching lines @@
   return chunk;
 }
 
 
 class CodeStubGraphBuilderBase : public HGraphBuilder {
  public:
   CodeStubGraphBuilderBase(Isolate* isolate, HydrogenCodeStub* stub)
       : HGraphBuilder(&info_),
         arguments_length_(NULL),
         info_(stub, isolate),
+        descriptor_(stub),
         context_(NULL) {
-    stub->InitializeInterfaceDescriptor(&descriptor_);
     int parameter_count = descriptor_.GetEnvironmentParameterCount();
     parameters_.Reset(new HParameter*[parameter_count]);
   }
   virtual bool BuildGraph();
 
  protected:
   virtual HValue* BuildCodeStub() = 0;
   HParameter* GetParameter(int parameter) {
     DCHECK(parameter < descriptor_.GetEnvironmentParameterCount());
     return parameters_[parameter];
@@ skipping 192 matching lines @@
       GetStubType());
   Handle<Code> new_object = factory->NewCode(
       desc, flags, masm.CodeObject(), NeedsImmovableCode());
   return new_object;
 }
 
 
 template <class Stub>
 static Handle<Code> DoGenerateCode(Stub* stub) {
   Isolate* isolate = stub->isolate();
-  CodeStubInterfaceDescriptor descriptor;
-  stub->InitializeInterfaceDescriptor(&descriptor);
+  CodeStubInterfaceDescriptor descriptor(stub);
 
   // If we are uninitialized we can use a light-weight stub to enter
   // the runtime that is significantly faster than using the standard
   // stub-failure deopt mechanism.
   if (stub->IsUninitialized() && descriptor.has_miss_handler()) {
     DCHECK(!descriptor.stack_parameter_count().is_valid());
     return stub->GenerateLightweightMissCode();
   }
   base::ElapsedTimer timer;
   if (FLAG_profile_hydrogen_code_stub_compilation) {
@@ skipping 1536 matching lines @@
   HValue* receiver = GetParameter(VectorLoadICDescriptor::kReceiverIndex);
   Add<HDeoptimize>("Always deopt", Deoptimizer::EAGER);
   return receiver;
 }
 
 
 Handle<Code> VectorKeyedLoadStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 } }  // namespace v8::internal