[turbofan] Centralize splitting for memory operands.

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/coalesced-live-ranges.h"
 #include "src/compiler/register-allocator.h"
 #include "src/zone-containers.h"
@@ skipping 110 matching lines @@
   // Schedule unassigned live ranges for allocation.
   void ScheduleAllocationCandidates();
 
   void AllocateRegisterToRange(unsigned reg_id, LiveRange* range) {
     UpdateWeightAtAllocation(range);
     current_allocations(reg_id)->AllocateRange(range);
   }
   // Evict and reschedule conflicts of a given range, at a given register.
   void EvictAndRescheduleConflicts(unsigned reg_id, const LiveRange* range);
 
-  // Find the optimal split for ranges defined by a memory operand, e.g.
-  // constants or function parameters passed on the stack.
-  void SplitAndSpillRangesDefinedByMemoryOperand();
-
   void TryAllocateCandidate(const AllocationCandidate& candidate);
   void TryAllocateLiveRange(LiveRange* range);
   void TryAllocateGroup(LiveRangeGroup* group);
 
-  bool CanProcessRange(LiveRange* range) const {
-    return range != nullptr && !range->IsEmpty() && range->kind() == mode();
-  }
-
   // Calculate the weight of a candidate for allocation.
   void EnsureValidRangeWeight(LiveRange* range);
 
   // Calculate the new weight of a range that is about to be allocated.
   float GetAllocatedRangeWeight(float candidate_weight);
 
   // Returns kInvalidWeight if there are no conflicts, or the largest weight of
   // a range conflicting with the given range, at the given register.
   float GetMaximumConflictingWeight(unsigned reg_id, const LiveRange* range,
                                     float competing_weight) const;
@@ skipping 45 matching lines @@
   ZoneVector<CoalescedLiveRanges*> allocations_;
   AllocationScheduler scheduler_;
   ZoneVector<LiveRangeGroup*> groups_;
 
   DISALLOW_COPY_AND_ASSIGN(GreedyAllocator);
 };
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_GREEDY_ALLOCATOR_H_