Revert of [Atomics] Remove Atomics code stubs; use TF ops

src/compiler/code-stub-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-stub-assembler.h"
 
 #include <ostream>
 
 #include "src/code-factory.h"
 #include "src/compiler/graph.h"
@@ skipping 726 matching lines @@
 }
 
 Node* CodeStubAssembler::Load(MachineType rep, Node* base) {
   return raw_assembler_->Load(rep, base);
 }
 
 Node* CodeStubAssembler::Load(MachineType rep, Node* base, Node* index) {
   return raw_assembler_->Load(rep, base, index);
 }
 
-Node* CodeStubAssembler::AtomicLoad(MachineType rep, Node* base, Node* index) {
-  return raw_assembler_->AtomicLoad(rep, base, index);
-}
-
 Node* CodeStubAssembler::Store(MachineRepresentation rep, Node* base,
                                Node* value) {
   return raw_assembler_->Store(rep, base, value, kFullWriteBarrier);
 }
 
 Node* CodeStubAssembler::Store(MachineRepresentation rep, Node* base,
                                Node* index, Node* value) {
   return raw_assembler_->Store(rep, base, index, value, kFullWriteBarrier);
 }
 
@@ skipping 552 matching lines @@
 
   Bind(&if_done);
   return var_result.value();
 }
 
 Node* CodeStubAssembler::TruncateFloat64ToInt32(Node* value) {
   return raw_assembler_->TruncateFloat64ToInt32(TruncationMode::kJavaScript,
                                                 value);
 }
 
-Node* CodeStubAssembler::ChangeUint32ToWord(Node* value) {
-  if (raw_assembler_->machine()->Is64()) {
-    value = raw_assembler_->ChangeUint32ToUint64(value);
-  }
-  return value;
-}
-
 void CodeStubAssembler::BranchIf(Node* condition, Label* if_true,
                                  Label* if_false) {
   Label if_condition_is_true(this), if_condition_is_false(this);
   Branch(condition, &if_condition_is_true, &if_condition_is_false);
   Bind(&if_condition_is_true);
   Goto(if_true);
   Bind(&if_condition_is_false);
   Goto(if_false);
 }
 
@@ skipping 423 matching lines @@
       }
     }
   }
 
   bound_ = true;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8