[turbofan] Add an operator to access the parent frame pointer

src/compiler/machine-operator.h

 // Copyright 2013 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.
 
 #ifndef V8_COMPILER_MACHINE_OPERATOR_H_
 #define V8_COMPILER_MACHINE_OPERATOR_H_
 
 #include "src/base/flags.h"
 #include "src/machine-type.h"
 
@@ skipping 295 matching lines @@
   const Operator* Load(LoadRepresentation rep);
 
   // store [base + index], value
   const Operator* Store(StoreRepresentation rep);
 
   const Operator* StackSlot(MachineRepresentation rep);
 
   // Access to the machine stack.
   const Operator* LoadStackPointer();
   const Operator* LoadFramePointer();
+  const Operator* LoadParentFramePointer();
 
   // checked-load heap, index, length
   const Operator* CheckedLoad(CheckedLoadRepresentation);
   // checked-store heap, index, length, value
   const Operator* CheckedStore(CheckedStoreRepresentation);
 
   // Target machine word-size assumed by this builder.
   bool Is32() const { return word() == MachineRepresentation::kWord32; }
   bool Is64() const { return word() == MachineRepresentation::kWord64; }
   MachineRepresentation word() const { return word_; }
@@ skipping 36 matching lines @@
 };
 
 
 DEFINE_OPERATORS_FOR_FLAGS(MachineOperatorBuilder::Flags)
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_MACHINE_OPERATOR_H_