Calculate blocks needing a frame and frame (de)construction sites.

src/compiler/instruction.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_COMPILER_INSTRUCTION_H_
 #define V8_COMPILER_INSTRUCTION_H_
 
 #include <deque>
 #include <iosfwd>
 #include <map>
@@ skipping 910 matching lines @@
   Successors& successors() { return successors_; }
   const Successors& successors() const { return successors_; }
   size_t SuccessorCount() const { return successors_.size(); }
 
   typedef ZoneVector<PhiInstruction*> PhiInstructions;
   const PhiInstructions& phis() const { return phis_; }
   void AddPhi(PhiInstruction* phi) { phis_.push_back(phi); }
 
   void set_ao_number(RpoNumber ao_number) { ao_number_ = ao_number; }
 
+  bool needs_frame() const { return needs_frame_; }
+  void mark_needs_frame() { needs_frame_ = true; }
+
+  bool must_construct_frame() const { return must_construct_frame_; }
+  void mark_must_construct_frame() { must_construct_frame_ = true; }
+
+  bool must_deconstruct_frame() const { return must_deconstruct_frame_; }
+  void mark_must_deconstruct_frame() { must_deconstruct_frame_ = true; }
+
  private:
   Successors successors_;
   Predecessors predecessors_;
   PhiInstructions phis_;
   RpoNumber ao_number_;  // Assembly order number.
   const RpoNumber rpo_number_;
   const RpoNumber loop_header_;
   const RpoNumber loop_end_;
   int32_t code_start_;   // start index of arch-specific code.
   int32_t code_end_;     // end index of arch-specific code.
   const bool deferred_;  // Block contains deferred code.
+  bool needs_frame_;
+  bool must_construct_frame_;
+  bool must_deconstruct_frame_;
 };
 
 typedef ZoneDeque<Constant> ConstantDeque;
 typedef std::map<int, Constant, std::less<int>,
                  zone_allocator<std::pair<int, Constant> > > ConstantMap;
 
 typedef ZoneDeque<Instruction*> InstructionDeque;
 typedef ZoneDeque<ReferenceMap*> ReferenceMapDeque;
 typedef ZoneVector<FrameStateDescriptor*> DeoptimizationVector;
 typedef ZoneVector<InstructionBlock*> InstructionBlocks;
@@ skipping 162 matching lines @@
 
 
 std::ostream& operator<<(std::ostream& os,
                          const PrintableInstructionSequence& code);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_H_