Improve instruction creating/adding shorthand in HGraphBuilder

src/hydrogen-bch.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 260 matching lines @@
         has_upper_constant_limit = false;
       }
 
       current_check->check()->block()->graph()->isolate()->counters()->
           bounds_checks_eliminated()->Increment();
       current_check->check()->set_skip_check();
       current_check = current_check->next();
     }
 
     // Choose the appropriate limit.
+    Zone* zone = graph()->zone();
+    HValue* context = graph()->GetInvalidContext();
     HValue* limit = data->limit();
     if (has_upper_constant_limit) {
-      HConstant* new_limit = new(pre_header->graph()->zone()) HConstant(
-          upper_constant_limit, length->representation());
+      HConstant* new_limit = HConstant::New(zone, context,
+                                            upper_constant_limit);
       new_limit->InsertBefore(pre_header->end());
       limit = new_limit;
     }
 
     // If necessary, redefine the limit in the preheader.
     if (limit->IsInteger32Constant() &&
         limit->block() != pre_header &&
         !limit->block()->Dominates(pre_header)) {
-      HConstant* new_limit = new(pre_header->graph()->zone()) HConstant(
-          limit->GetInteger32Constant(), length->representation());
+      HConstant* new_limit = HConstant::New(zone, context,
+                                            limit->GetInteger32Constant());
       new_limit->InsertBefore(pre_header->end());
       limit = new_limit;
     }
 
     // Do the hoisting.
-    HBoundsCheck* hoisted_check = new(pre_header->zone()) HBoundsCheck(
-        limit, check->check()->length());
+    HBoundsCheck* hoisted_check = HBoundsCheck::New(
+        zone, context, limit, check->check()->length());
     hoisted_check->InsertBefore(pre_header->end());
     hoisted_check->set_allow_equality(true);
     hoisted_check->block()->graph()->isolate()->counters()->
         bounds_checks_hoisted()->Increment();
   }
 
   void CollectInductionVariableData(HBasicBlock* bb) {
     bool additional_limit = false;
 
     for (int i = 0; i < bb->phis()->length(); i++) {
@@ skipping 87 matching lines @@
 void HBoundsCheckHoistingPhase::HoistRedundantBoundsChecks() {
   InductionVariableBlocksTable table(graph());
   table.CollectInductionVariableData(graph()->entry_block());
   for (int i = 0; i < graph()->blocks()->length(); i++) {
     table.EliminateRedundantBoundsChecks(graph()->blocks()->at(i));
   }
 }
 
 } }  // namespace v8::internal