[stubs] Add LoadFixedArrayElements with int index

src/code-stubs.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/code-stubs.h"
 
 #include <sstream>
 
 #include "src/ast/ast.h"
 #include "src/bootstrapper.h"
@@ skipping 1869 matching lines @@
     compiler::CodeAssemblerState* state) const {
   typedef compiler::Node Node;
   CodeStubAssembler assembler(state);
   Node* context = assembler.Parameter(Descriptor::kContext);
   Node* receiver = assembler.Parameter(Descriptor::kReceiver);
   // For now we only support receiver_is_holder.
   DCHECK(receiver_is_holder());
   Node* holder = receiver;
   Node* map = assembler.LoadMap(receiver);
   Node* descriptors = assembler.LoadMapDescriptors(map);
-  Node* value_index =
-      assembler.IntPtrConstant(DescriptorArray::ToValueIndex(index()));
   Node* callback = assembler.LoadFixedArrayElement(
-      descriptors, value_index, 0, CodeStubAssembler::INTPTR_PARAMETERS);
+      descriptors, DescriptorArray::ToValueIndex(index()));
   assembler.TailCallStub(CodeFactory::ApiGetter(isolate()), context, receiver,
                          holder, callback);
 }
 
 void StoreFieldStub::GenerateAssembly(
     compiler::CodeAssemblerState* state) const {
   typedef CodeStubAssembler::Label Label;
   typedef compiler::Node Node;
   CodeStubAssembler assembler(state);
 
@@ skipping 180 matching lines @@
     compiler::CodeAssemblerState* state) const {
   typedef compiler::Node Node;
   CodeStubAssembler assembler(state);
 
   assembler.Comment("LoadScriptContextFieldStub: context_index=%d, slot=%d",
                     context_index(), slot_index());
 
   Node* context = assembler.Parameter(Descriptor::kContext);
 
   Node* script_context = assembler.LoadScriptContext(context, context_index());
-  Node* result = assembler.LoadFixedArrayElement(
-      script_context, assembler.IntPtrConstant(slot_index()), 0,
-      CodeStubAssembler::INTPTR_PARAMETERS);
+  Node* result = assembler.LoadFixedArrayElement(script_context, slot_index());
   assembler.Return(result);
 }
 
 void StoreScriptContextFieldStub::GenerateAssembly(
     compiler::CodeAssemblerState* state) const {
   typedef compiler::Node Node;
   CodeStubAssembler assembler(state);
 
   assembler.Comment("StoreScriptContextFieldStub: context_index=%d, slot=%d",
                     context_index(), slot_index());
@@ skipping 1099 matching lines @@
 }
 
 ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate)
     : PlatformCodeStub(isolate) {}
 
 InternalArrayConstructorStub::InternalArrayConstructorStub(Isolate* isolate)
     : PlatformCodeStub(isolate) {}
 
 }  // namespace internal
 }  // namespace v8