[turbofan]: delay ssa deconstruction in register allocator

src/compiler/register-allocator.h

Index: src/compiler/register-allocator.h
diff --git a/src/compiler/register-allocator.h b/src/compiler/register-allocator.h
index 45c33712de70bb3cc3e64d4988238e6bf736d336..91a1ab2e8a1a83056789af0edc78bda8fa97806f 100644
--- a/src/compiler/register-allocator.h
+++ b/src/compiler/register-allocator.h
@@ -341,25 +341,21 @@ class RegisterAllocator FINAL : public ZoneObject {
   // Phase 1 : insert moves to account for fixed register operands.
   void MeetRegisterConstraints();
 
-  // Phase 2: deconstruct SSA by inserting moves in successors and the headers
-  // of blocks containing phis.
-  void ResolvePhis();
-
-  // Phase 3: compute liveness of all virtual register.
+  // Phase 2: compute liveness of all virtual register.
   void BuildLiveRanges();
   bool ExistsUseWithoutDefinition();
 
-  // Phase 4: compute register assignments.
+  // Phase 3: compute register assignments.
   void AllocateGeneralRegisters();
   void AllocateDoubleRegisters();
 
-  // Phase 5: compute values for pointer maps.
+  // Phase 4: compute values for pointer maps.
   void PopulatePointerMaps();  // TODO(titzer): rename to PopulateReferenceMaps.
 
-  // Phase 6: reconnect split ranges with moves.
+  // Phase 5: reconnect split ranges with moves.
   void ConnectRanges();
 
-  // Phase 7: insert moves to connect ranges across basic blocks.
+  // Phase 6: insert moves to connect ranges across basic blocks.
   void ResolveControlFlow();
 
  private:
@@ -407,7 +403,7 @@ class RegisterAllocator FINAL : public ZoneObject {
                               int gap_index);
   void MeetRegisterConstraintsForLastInstructionInBlock(
       const InstructionBlock* block);
-  void ResolvePhis(const InstructionBlock* block);
+  void ProcessPhis(const InstructionBlock* block);
 
   // Helper methods for building intervals.
   InstructionOperand* AllocateFixed(UnallocatedOperand* operand, int pos,