[turbofan] update register allocator with auto, nullptr and ZoneVector

src/compiler/register-allocator.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_REGISTER_ALLOCATOR_H_
 #define V8_REGISTER_ALLOCATOR_H_
 
 #include "src/compiler/instruction.h"
 #include "src/zone-containers.h"
 
@@ skipping 434 matching lines @@
 
 #ifdef DEBUG
   void Verify() const;
 #endif
 
   void AllocateRegisters();
   bool CanEagerlyResolveControlFlow(const InstructionBlock* block) const;
   bool SafePointsAreInOrder() const;
 
   // Liveness analysis support.
-  void InitializeLivenessAnalysis();
   BitVector* ComputeLiveOut(const InstructionBlock* block);
   void AddInitialIntervals(const InstructionBlock* block, BitVector* live_out);
   bool IsOutputRegisterOf(Instruction* instr, int index);
   bool IsOutputDoubleRegisterOf(Instruction* instr, int index);
   void ProcessInstructions(const InstructionBlock* block, BitVector* live);
   void MeetRegisterConstraints(const InstructionBlock* block);
   void MeetConstraintsBetween(Instruction* first, Instruction* second,
                               int gap_index);
   void MeetRegisterConstraintsForLastInstructionInBlock(
       const InstructionBlock* block);
@@ skipping 96 matching lines @@
   LiveRange* LiveRangeFor(int index);
   GapInstruction* GetLastGap(const InstructionBlock* block);
 
   const char* RegisterName(int allocation_index);
 
   Instruction* InstructionAt(int index) { return code()->InstructionAt(index); }
 
   Frame* frame() const { return frame_; }
   const char* debug_name() const { return debug_name_; }
   const RegisterConfiguration* config() const { return config_; }
+  ZoneVector<LiveRange*>& live_ranges() { return live_ranges_; }
+  ZoneVector<LiveRange*>& fixed_live_ranges() { return fixed_live_ranges_; }
+  ZoneVector<LiveRange*>& fixed_double_live_ranges() {
+    return fixed_double_live_ranges_;
+  }
+  ZoneVector<LiveRange*>& unhandled_live_ranges() {
+    return unhandled_live_ranges_;
+  }
+  ZoneVector<LiveRange*>& active_live_ranges() { return active_live_ranges_; }
+  ZoneVector<LiveRange*>& inactive_live_ranges() {
+    return inactive_live_ranges_;
+  }
+  ZoneVector<LiveRange*>& reusable_slots() { return reusable_slots_; }
+  ZoneVector<SpillRange*>& spill_ranges() { return spill_ranges_; }
 
   struct PhiMapValue {
     PhiMapValue(PhiInstruction* phi, const InstructionBlock* block)
         : phi(phi), block(block) {}
     PhiInstruction* const phi;
     const InstructionBlock* const block;
   };
   typedef std::map<int, PhiMapValue, std::less<int>,
                    zone_allocator<std::pair<int, PhiMapValue>>> PhiMap;
 
   Zone* const local_zone_;
   Frame* const frame_;
   InstructionSequence* const code_;
   const char* const debug_name_;
 
   const RegisterConfiguration* config_;
 
   PhiMap phi_map_;
 
   // During liveness analysis keep a mapping from block id to live_in sets
   // for blocks already analyzed.
   ZoneVector<BitVector*> live_in_sets_;
 
   // Liveness analysis results.
   ZoneVector<LiveRange*> live_ranges_;
 
   // Lists of live ranges
   ZoneVector<LiveRange*> fixed_live_ranges_;
   ZoneVector<LiveRange*> fixed_double_live_ranges_;
-  ZoneList<LiveRange*> unhandled_live_ranges_;
-  ZoneList<LiveRange*> active_live_ranges_;
-  ZoneList<LiveRange*> inactive_live_ranges_;
-  ZoneList<LiveRange*> reusable_slots_;
-  ZoneList<SpillRange*> spill_ranges_;
+  ZoneVector<LiveRange*> unhandled_live_ranges_;
+  ZoneVector<LiveRange*> active_live_ranges_;
+  ZoneVector<LiveRange*> inactive_live_ranges_;
+  ZoneVector<LiveRange*> reusable_slots_;
+  ZoneVector<SpillRange*> spill_ranges_;
 
   RegisterKind mode_;
   int num_registers_;
 
   BitVector* assigned_registers_;
   BitVector* assigned_double_registers_;
 
   // Indicates success or failure during register allocation.
   bool allocation_ok_;
 
 #ifdef DEBUG
   LifetimePosition allocation_finger_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(RegisterAllocator);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_REGISTER_ALLOCATOR_H_