[Atomics] Remove Atomics code stubs; use TF ops

src/compiler/code-assembler.cc

 // Copyright 2015 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/compiler/code-assembler.h"
 
 #include <ostream>
 
 #include "src/code-factory.h"
 #include "src/compiler/graph.h"
@@ skipping 183 matching lines @@
 
 Node* CodeAssembler::TruncateFloat64ToInt32RoundToZero(Node* a) {
   return raw_assembler_->TruncateFloat64ToInt32(TruncationMode::kRoundToZero,
                                                 a);
 }
 
 Node* CodeAssembler::TruncateFloat64ToInt32JavaScript(Node* a) {
   return raw_assembler_->TruncateFloat64ToInt32(TruncationMode::kJavaScript, a);
 }
 
+Node* CodeAssembler::ChangeUint32ToWord(Node* value) {
+  if (raw_assembler_->machine()->Is64()) {
+    value = raw_assembler_->ChangeUint32ToUint64(value);
+  }
+  return value;
+}
+
 #define DEFINE_CODE_ASSEMBLER_UNARY_OP(name) \
   Node* CodeAssembler::name(Node* a) { return raw_assembler_->name(a); }
 CODE_ASSEMBLER_UNARY_OP_LIST(DEFINE_CODE_ASSEMBLER_UNARY_OP)
 #undef DEFINE_CODE_ASSEMBLER_UNARY_OP
 
 Node* CodeAssembler::LoadRoot(Heap::RootListIndex root_index) {
   if (isolate()->heap()->RootCanBeTreatedAsConstant(root_index)) {
     Handle<Object> root = isolate()->heap()->root_handle(root_index);
     if (root->IsSmi()) {
       return SmiConstant(Smi::cast(*root));
@@ skipping 134 matching lines @@
 }
 
 Node* CodeAssembler::Load(MachineType rep, Node* base) {
   return raw_assembler_->Load(rep, base);
 }
 
 Node* CodeAssembler::Load(MachineType rep, Node* base, Node* index) {
   return raw_assembler_->Load(rep, base, index);
 }
 
+Node* CodeAssembler::AtomicLoad(MachineType rep, Node* base, Node* index) {
+  return raw_assembler_->AtomicLoad(rep, base, index);
+}
+
 Node* CodeAssembler::Store(MachineRepresentation rep, Node* base, Node* value) {
   return raw_assembler_->Store(rep, base, value, kFullWriteBarrier);
 }
 
 Node* CodeAssembler::Store(MachineRepresentation rep, Node* base, Node* index,
                            Node* value) {
   return raw_assembler_->Store(rep, base, index, value, kFullWriteBarrier);
 }
 
 Node* CodeAssembler::StoreNoWriteBarrier(MachineRepresentation rep, Node* base,
@@ skipping 437 matching lines @@
       }
     }
   }
 
   bound_ = true;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8