[turbofan] pass zone to InstructionSequence

src/compiler/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/compiler/instruction.h"
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/generic-node-inl.h"
 #include "src/compiler/graph.h"
 
@@ skipping 362 matching lines @@
   size_t rpo_number = 0;
   for (BasicBlockVector::const_iterator it = schedule->rpo_order()->begin();
        it != schedule->rpo_order()->end(); ++it, ++rpo_number) {
     DCHECK_EQ(NULL, (*blocks)[rpo_number]);
     DCHECK((*it)->GetRpoNumber().ToSize() == rpo_number);
     (*blocks)[rpo_number] = new (zone) InstructionBlock(zone, *it);
   }
 }
 
 
-InstructionSequence::InstructionSequence(Linkage* linkage, const Graph* graph,
+InstructionSequence::InstructionSequence(Zone* instruction_zone,
+                                         Linkage* linkage, const Graph* graph,
                                          const Schedule* schedule)
-    : zone_(schedule->zone()),
+    : zone_(instruction_zone),
       node_count_(graph->NodeCount()),
       node_map_(zone()->NewArray<int>(node_count_)),
       instruction_blocks_(static_cast<int>(schedule->rpo_order()->size()), NULL,
                           zone()),
       linkage_(linkage),
       constants_(ConstantMap::key_compare(),
                  ConstantMap::allocator_type(zone())),
       immediates_(zone()),
       instructions_(zone()),
       next_virtual_register_(0),
@@ skipping 254 matching lines @@
       os << " B" << succ_block->id();
     }
     os << "\n";
   }
   return os;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8