Separate greedy regalloc in its own files

src/compiler/greedy-allocator.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_GREEDY_ALLOCATOR_H_
+#define V8_GREEDY_ALLOCATOR_H_
+
+#include "src/compiler/register-allocator.h"
+#include "src/zone-containers.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+class CoalescedLiveRanges;
+
+
+// A variant of the LLVM Greedy Register Allocator. See
+// http://blog.llvm.org/2011/09/greedy-register-allocation-in-llvm-30.html
+class GreedyAllocator final : public RegisterAllocator {
+ public:
+  explicit GreedyAllocator(RegisterAllocationData* data, RegisterKind kind,
+                           Zone* local_zone);
+
+  void AllocateRegisters();
+
+ private:
+  LifetimePosition GetSplittablePos(LifetimePosition pos);
+  const RegisterConfiguration* config() const { return data()->config(); }
+  Zone* local_zone() const { return local_zone_; }
+
+  int GetHintedRegister(LiveRange* range);
+
+  typedef ZonePriorityQueue<std::pair<unsigned, LiveRange*>> PQueue;
+
+  unsigned GetLiveRangeSize(LiveRange* range);
+  void Enqueue(LiveRange* range);
+
+  void Evict(LiveRange* range);
+  float CalculateSpillWeight(LiveRange* range);
+  float CalculateMaxSpillWeight(const ZoneSet<LiveRange*>& ranges);
+
+
+  bool TryAllocate(LiveRange* current, ZoneSet<LiveRange*>* conflicting);
+  bool TryAllocatePhysicalRegister(unsigned reg_id, LiveRange* range,
+                                   ZoneSet<LiveRange*>* conflicting);
+  bool HandleSpillOperands(LiveRange* range);
+  void AllocateBlockedRange(LiveRange* current, LifetimePosition pos,
+                            bool spill);
+
+  LiveRange* SpillBetweenUntil(LiveRange* range, LifetimePosition start,
+                               LifetimePosition until, LifetimePosition end);
+  void AssignRangeToRegister(int reg_id, LiveRange* range);
+
+  LifetimePosition FindProgressingSplitPosition(LiveRange* range,
+                                                bool* is_spill_pos);
+
+  Zone* local_zone_;
+  ZoneVector<CoalescedLiveRanges*> allocations_;
+  PQueue queue_;
+  DISALLOW_COPY_AND_ASSIGN(GreedyAllocator);
+};
+}

[Jarin, 2015/06/16 06:39:40]

Missing comments for namespace endings.

[Mircea Trofin, 2015/06/16 16:16:25]

Done.

+}
+}
+#endif  // V8_GREEDY_ALLOCATOR_H_