[turbofan] Add the StackSlot operator to turbofan.

test/cctest/compiler/codegen-tester.h

 // 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.
 
 #ifndef V8_CCTEST_COMPILER_CODEGEN_TESTER_H_
 #define V8_CCTEST_COMPILER_CODEGEN_TESTER_H_
 
 #include "src/compiler/instruction-selector.h"
 #include "src/compiler/pipeline.h"
 #include "src/compiler/raw-machine-assembler.h"
@@ skipping 78 matching lines @@
   // The BufferedRawMachineAssemblerTester does not pass parameters directly
   // to the constructed IR graph. Instead it passes a pointer to the parameter
   // to the IR graph, and adds Load nodes to the IR graph to load the
   // parameters from memory. Thereby it is possible to pass 64 bit parameters
   // to the IR graph.
   Node* Parameter(size_t index) {
     CHECK(index < 4);
     return parameter_nodes_[index];
   }
 
-
   // The BufferedRawMachineAssemblerTester adds a Store node to the IR graph
   // to store the graph's return value in memory. The memory address for the
   // Store node is provided as a parameter. By storing the return value in
   // memory it is possible to return 64 bit values.
   void Return(Node* input) {
     Store(MachineTypeForC<ReturnType>().representation(),
           RawMachineAssembler::Parameter(return_parameter_index_), input,
           kNoWriteBarrier);
     RawMachineAssembler::Return(Int32Constant(1234));
   }
@@ skipping 128 matching lines @@
                               ? nullptr
                               : Load(p1, RawMachineAssembler::Parameter(1));
     parameter_nodes_[2] = p2 == MachineType::None()
                               ? nullptr
                               : Load(p2, RawMachineAssembler::Parameter(2));
     parameter_nodes_[3] = p3 == MachineType::None()
                               ? nullptr
                               : Load(p3, RawMachineAssembler::Parameter(3));
   }
 
-
   // The BufferedRawMachineAssemblerTester does not pass parameters directly
   // to the constructed IR graph. Instead it passes a pointer to the parameter
   // to the IR graph, and adds Load nodes to the IR graph to load the
   // parameters from memory. Thereby it is possible to pass 64 bit parameters
   // to the IR graph.
   Node* Parameter(size_t index) {
     CHECK(index >= 0 && index < 4);
     return parameter_nodes_[index];
   }
 
@@ skipping 294 matching lines @@
   } else {
     CHECK_EQ(x, y);
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CCTEST_COMPILER_CODEGEN_TESTER_H_