[turbofan] Remove dead code from JSGenericLowering.

src/compiler/js-generic-lowering.cc

 // Copyright 2014 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-factory.h"
 #include "src/code-stubs.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/js-generic-lowering.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 191 matching lines @@
   node->TrimInputCount(3);
   node->ReplaceInput(0, booleanize);
   node->ReplaceInput(1, true_value);
   node->ReplaceInput(2, false_value);
   node->set_op(common()->Select(kMachAnyTagged));
 }
 
 
 void JSGenericLowering::ReplaceWithStubCall(Node* node, Callable callable,
                                             CallDescriptor::Flags flags) {
-  const Operator* old_op = node->op();
-  Operator::Properties properties = old_op->properties();
+  Operator::Properties properties = node->op()->properties();
   CallDescriptor* desc = Linkage::GetStubCallDescriptor(
       isolate(), zone(), callable.descriptor(), 0, flags, properties);
-  const Operator* new_op = common()->Call(desc);
-
   Node* stub_code = jsgraph()->HeapConstant(callable.code());
   node->InsertInput(zone(), 0, stub_code);
-  node->set_op(new_op);
-
-#if 0 && DEBUG
-    // Check for at most one framestate and that it's at the right position.
-  int where = -1;
-  for (int index = 0; index < node->InputCount(); index++) {
-    if (node->InputAt(index)->opcode() == IrOpcode::kFrameState) {
-      if (where >= 0) {
-        V8_Fatal(__FILE__, __LINE__,
-                 "node #%d:%s already has a framestate at index %d",
-                 node->id(), node->op()->mnemonic(), where);
-      }
-      where = index;
-      DCHECK_EQ(NodeProperties::FirstFrameStateIndex(node), where);
-      DCHECK(flags & CallDescriptor::kNeedsFrameState);
-    }
-  }
-  if (flags & CallDescriptor::kNeedsFrameState) {
-    DCHECK_GE(where, 0);  // should have found a frame state.
-  }
-#endif
+  node->set_op(common()->Call(desc));
 }
 
 
 void JSGenericLowering::ReplaceWithBuiltinCall(Node* node,
                                                Builtins::JavaScript id,
                                                int nargs) {
   Node* context_input = NodeProperties::GetContextInput(node);
   Node* effect_input = NodeProperties::GetEffectInput(node);
 
   CallDescriptor::Flags flags = AdjustFrameStatesForCall(node);
@@ skipping 546 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSGenericLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8