[turbofan] fine grained in-block move optimization

src/compiler/instruction.h

Index: src/compiler/instruction.h
diff --git a/src/compiler/instruction.h b/src/compiler/instruction.h
index 16bff0686589d595c774947f56a351769924bfab..8396fe30f2793bdc644e7735102a17cafbfad6dd 100644
--- a/src/compiler/instruction.h
+++ b/src/compiler/instruction.h
@@ -633,8 +633,14 @@ class ParallelMove final : public ZoneVector<MoveOperands*>, public ZoneObject {
 
   MoveOperands* AddMove(const InstructionOperand& from,
                         const InstructionOperand& to) {
-    auto zone = get_allocator().zone();
-    auto move = new (zone) MoveOperands(from, to);
+    Zone* zone = get_allocator().zone();
+    return AddMove(from, to, zone);
+  }
+
+  MoveOperands* AddMove(const InstructionOperand& from,
+                        const InstructionOperand& to,
+                        Zone* operand_allocation_zone) {
+    MoveOperands* move = new (operand_allocation_zone) MoveOperands(from, to);
     push_back(move);
     return move;
   }