[turbofan] Deferred blocks splintering.

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 760 matching lines @@
   }
   bool IsValid() const { return index_ >= 0; }
   static RpoNumber FromInt(int index) { return RpoNumber(index); }
   static RpoNumber Invalid() { return RpoNumber(kInvalidRpoNumber); }
 
   bool IsNext(const RpoNumber other) const {
     DCHECK(IsValid());
     return other.index_ == this->index_ + 1;
   }
 
-  bool operator==(RpoNumber other) const {
-    return this->index_ == other.index_;
-  }
+  // Comparison operators.
+  bool operator==(RpoNumber other) const { return index_ == other.index_; }
+  bool operator!=(RpoNumber other) const { return index_ != other.index_; }
+  bool operator>(RpoNumber other) const { return index_ > other.index_; }
+  bool operator<(RpoNumber other) const { return index_ < other.index_; }
+  bool operator<=(RpoNumber other) const { return index_ <= other.index_; }
+  bool operator>=(RpoNumber other) const { return index_ >= other.index_; }
 
  private:
   explicit RpoNumber(int32_t index) : index_(index) {}
   int32_t index_;
 };
 
 
 std::ostream& operator<<(std::ostream&, const RpoNumber&);
 
 
@@ skipping 191 matching lines @@
 
   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; }
 
+  void set_last_deferred(RpoNumber last) { last_deferred_ = last; }
+  RpoNumber last_deferred() const { return last_deferred_; }
+
  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.
   const bool handler_;   // Block is a handler entry point.
   bool needs_frame_;
   bool must_construct_frame_;
   bool must_deconstruct_frame_;
+  RpoNumber last_deferred_;
 };
 
 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 185 matching lines @@
 
 
 std::ostream& operator<<(std::ostream& os,
                          const PrintableInstructionSequence& code);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_H_