Revert "[turbofan] Add new JSFrameSpecialization reducer."

src/compiler/js-frame-specialization.cc

Index: src/compiler/js-frame-specialization.cc
diff --git a/src/compiler/js-frame-specialization.cc b/src/compiler/js-frame-specialization.cc
deleted file mode 100644
index 98b1827492545fd96a88a935cabfd33b6d8f36bd..0000000000000000000000000000000000000000
--- a/src/compiler/js-frame-specialization.cc
+++ /dev/null
@@ -1,69 +0,0 @@
-// 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/js-frame-specialization.h"
-
-#include "src/compiler/js-graph.h"
-#include "src/compiler/linkage.h"
-#include "src/frames-inl.h"
-
-namespace v8 {
-namespace internal {
-namespace compiler {
-
-Reduction JSFrameSpecialization::Reduce(Node* node) {
-  switch (node->opcode()) {
-    case IrOpcode::kOsrValue:
-      return ReduceOsrValue(node);
-    case IrOpcode::kParameter:
-      return ReduceParameter(node);
-    default:
-      break;
-  }
-  return NoChange();
-}
-
-
-Reduction JSFrameSpecialization::ReduceOsrValue(Node* node) {
-  DCHECK_EQ(IrOpcode::kOsrValue, node->opcode());
-  DisallowHeapAllocation no_gc;
-  Object* object;
-  int const index = OpParameter<int>(node);
-  int const parameters_count = frame()->ComputeParametersCount() + 1;
-  if (index == Linkage::kOsrContextSpillSlotIndex) {
-    object = frame()->context();
-  } else if (index >= parameters_count) {
-    object = frame()->GetExpression(index - parameters_count);
-  } else {
-    // The OsrValue index 0 is the receiver.
-    object = index ? frame()->GetParameter(index - 1) : frame()->receiver();
-  }
-  return Replace(jsgraph()->Constant(handle(object, isolate())));
-}
-
-
-Reduction JSFrameSpecialization::ReduceParameter(Node* node) {
-  DCHECK_EQ(IrOpcode::kParameter, node->opcode());
-  DisallowHeapAllocation no_gc;
-  Object* object;
-  int const index = ParameterIndexOf(node->op());
-  int const parameters_count = frame()->ComputeParametersCount() + 1;
-  if (index == Linkage::kJSFunctionCallClosureParamIndex) {
-    object = frame()->function();
-  } else if (index == parameters_count) {
-    // The Parameter index (arity + 1) is the context.
-    object = frame()->context();
-  } else {
-    // The Parameter index 0 is the receiver.
-    object = index ? frame()->GetParameter(index - 1) : frame()->receiver();
-  }
-  return Replace(jsgraph()->Constant(handle(object, isolate())));
-}
-
-
-Isolate* JSFrameSpecialization::isolate() const { return jsgraph()->isolate(); }
-
-}  // namespace compiler
-}  // namespace internal
-}  // namespace v8