[turbofan] make zone allocation of InstructionOperand explicit

test/cctest/compiler/test-instruction.cc

 // 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.
 
 #include "src/v8.h"
 #include "test/cctest/cctest.h"
 
 #include "src/compiler/code-generator.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
@@ skipping 72 matching lines @@
     return node;
   }
 
   int NewInstr() {
     InstructionCode opcode = static_cast<InstructionCode>(110);
     TestInstr* instr = TestInstr::New(zone(), opcode);
     return code->AddInstruction(instr);
   }
 
   UnallocatedOperand* NewUnallocated(int vreg) {
-    return new (zone()) UnallocatedOperand(UnallocatedOperand::ANY, vreg);
+    return UnallocatedOperand(UnallocatedOperand::ANY, vreg).Copy(zone());
   }
 
   InstructionBlock* BlockAt(BasicBlock* block) {
     return code->InstructionBlockAt(block->GetRpoNumber());
   }
   BasicBlock* GetBasicBlock(int instruction_index) {
     const InstructionBlock* block =
         code->GetInstructionBlock(instruction_index);
     return schedule.rpo_order()->at(block->rpo_number().ToSize());
   }
@@ skipping 227 matching lines @@
           CHECK(inputs[z].Equals(m->InputAt(z)));
         }
 
         for (size_t z = 0; z < k; z++) {
           CHECK(temps[z].Equals(m->TempAt(z)));
         }
       }
     }
   }
 }