[turbofan] Remove virtual methods from CodeAssembler.

src/compiler/code-assembler.h

 // 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.
 
 #ifndef V8_COMPILER_CODE_ASSEMBLER_H_
 #define V8_COMPILER_CODE_ASSEMBLER_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 22 matching lines @@
 class CallDescriptor;
 class CodeAssemblerLabel;
 class CodeAssemblerVariable;
 class CodeAssemblerState;
 class Node;
 class RawMachineAssembler;
 class RawMachineLabel;
 
 typedef ZoneList<CodeAssemblerVariable*> CodeAssemblerVariableList;
 
+typedef std::function<void()> CodeAssemblerCallback;
+
 #define CODE_ASSEMBLER_COMPARE_BINARY_OP_LIST(V) \
   V(Float32Equal)                                \
   V(Float32LessThan)                             \
   V(Float32LessThanOrEqual)                      \
   V(Float32GreaterThan)                          \
   V(Float32GreaterThanOrEqual)                   \
   V(Float64Equal)                                \
   V(Float64LessThan)                             \
   V(Float64LessThanOrEqual)                      \
   V(Float64GreaterThan)                          \
@@ skipping 129 matching lines @@
 // clients, CodeAssembler also provides an abstraction for creating variables
 // and enhanced Label functionality to merge variable values along paths where
 // they have differing values, including loops.
 //
 // The CodeAssembler itself is stateless (and instances are expected to be
 // temporary-scoped and short-lived); all its state is encapsulated into
 // a CodeAssemblerState instance.
 class V8_EXPORT_PRIVATE CodeAssembler {
  public:
   explicit CodeAssembler(CodeAssemblerState* state) : state_(state) {}
-
-  virtual ~CodeAssembler();
+  ~CodeAssembler();
 
   static Handle<Code> GenerateCode(CodeAssemblerState* state);
 
   bool Is64() const;
   bool IsFloat64RoundUpSupported() const;
   bool IsFloat64RoundDownSupported() const;
   bool IsFloat64RoundTiesEvenSupported() const;
   bool IsFloat64RoundTruncateSupported() const;
 
   // Shortened aliases for use in CodeAssembler subclasses.
@@ skipping 163 matching lines @@
   // Helpers which delegate to RawMachineAssembler.
   Factory* factory() const;
   Isolate* isolate() const;
   Zone* zone() const;
 
   CodeAssemblerState* state() { return state_; }
 
   void BreakOnNode(int node_id);
 
  protected:
-  // Enables subclasses to perform operations before and after a call.
-  virtual void CallPrologue();
-  virtual void CallEpilogue();
+  void RegisterCallGenerationCallbacks(
+      const CodeAssemblerCallback& call_prologue,
+      const CodeAssemblerCallback& call_epilogue);
+  void UnregisterCallGenerationCallbacks();
 
  private:
   RawMachineAssembler* raw_assembler() const;
 
+  // Calls respective callback registered in the state.
+  void CallPrologue();
+  void CallEpilogue();
+
   CodeAssemblerState* state_;
 
   DISALLOW_COPY_AND_ASSIGN(CodeAssembler);
 };
 
 class CodeAssemblerVariable {
  public:
   explicit CodeAssemblerVariable(CodeAssembler* assembler,
                                  MachineRepresentation rep);
   ~CodeAssemblerVariable();
@@ skipping 76 matching lines @@
 
   CodeAssemblerState(Isolate* isolate, Zone* zone,
                      CallDescriptor* call_descriptor, Code::Flags flags,
                      const char* name);
 
   std::unique_ptr<RawMachineAssembler> raw_assembler_;
   Code::Flags flags_;
   const char* name_;
   bool code_generated_;
   ZoneSet<CodeAssemblerVariable::Impl*> variables_;
+  CodeAssemblerCallback call_prologue_;
+  CodeAssemblerCallback call_epilogue_;
 
   DISALLOW_COPY_AND_ASSIGN(CodeAssemblerState);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_ASSEMBLER_H_