[stubs] Port LoadScriptContextFieldStub and StoreScriptContextFieldStub to TurboFan.

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 4597 matching lines @@
   assembler->Return(value);
 
   assembler->Bind(&miss);
   {
     assembler->Comment("Miss");
     assembler->TailCallRuntime(Runtime::kKeyedStoreIC_Miss, context, receiver,
                                key, value, slot, vector);
   }
 }
 
+void LoadScriptContextFieldStub::GenerateAssembly(
+    CodeStubAssembler* assembler) const {
+  typedef compiler::Node Node;
+
+  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);
+  assembler->Return(result);
+}
+
+void StoreScriptContextFieldStub::GenerateAssembly(
+    CodeStubAssembler* assembler) const {
+  typedef compiler::Node Node;
+
+  assembler->Comment("StoreScriptContextFieldStub: context_index=%d, slot=%d",
+                     context_index(), slot_index());
+
+  Node* value = assembler->Parameter(Descriptor::kValue);
+  Node* context = assembler->Parameter(Descriptor::kContext);
+
+  Node* script_context = assembler->LoadScriptContext(context, context_index());
+  assembler->StoreFixedArrayElement(
+      script_context, assembler->IntPtrConstant(slot_index()), value,
+      UPDATE_WRITE_BARRIER, CodeStubAssembler::INTPTR_PARAMETERS);
+  assembler->Return(value);
+}
+
 // static
 compiler::Node* LessThanStub::Generate(CodeStubAssembler* assembler,
                                        compiler::Node* lhs, compiler::Node* rhs,
                                        compiler::Node* context) {
   return GenerateAbstractRelationalComparison(assembler, kLessThan, lhs, rhs,
                                               context);
 }
 
 // static
 compiler::Node* LessThanOrEqualStub::Generate(CodeStubAssembler* assembler,
@@ skipping 1400 matching lines @@
 
   if (type == MachineType::Pointer()) {
     return Representation::External();
   }
 
   return Representation::Tagged();
 }
 
 }  // namespace internal
 }  // namespace v8