Added old data space allocation infrastructure for pretenuring.

src/hydrogen-instructions.cc

 // Copyright 2012 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 3211 matching lines @@
           id(), Mnemonic(), dominator->id(), dominator->Mnemonic());
     }
     return;
   }
 
   // First update the size of the dominator allocate instruction.
   int32_t dominator_size_constant =
       HConstant::cast(dominator_size)->GetInteger32Constant();
   int32_t current_size_constant =
       HConstant::cast(current_size)->GetInteger32Constant();
+  int32_t new_dominator_size = dominator_size_constant + current_size_constant;
+  if (new_dominator_size > Page::kMaxNonCodeHeapObjectSize) {
+    if (FLAG_trace_allocation_folding) {
+      PrintF("#%d (%s) cannot fold into #%d (%s) due to size: %d\n",
+          id(), Mnemonic(), dominator->id(), dominator->Mnemonic(),
+          new_dominator_size);
+    }
+    return;
+  }
   HBasicBlock* block = dominator->block();
   Zone* zone = block->zone();
-  HInstruction* new_dominator_size = new(zone) HConstant(
-      dominator_size_constant + current_size_constant);
-  new_dominator_size->InsertBefore(dominator_allocate_instr);
-  dominator_allocate_instr->UpdateSize(new_dominator_size);
+  HInstruction* new_dominator_size_constant = new(zone) HConstant(
+      new_dominator_size);
+  new_dominator_size_constant->InsertBefore(dominator_allocate_instr);
+  dominator_allocate_instr->UpdateSize(new_dominator_size_constant);
 
 #ifdef VERIFY_HEAP
   HInstruction* free_space_instr =
       new(zone) HInnerAllocatedObject(dominator_allocate_instr,
                                       dominator_size_constant,
                                       type());
   free_space_instr->InsertAfter(dominator_allocate_instr);
   HConstant* filler_map = new(zone) HConstant(
       isolate()->factory()->free_space_map(),
       UniqueValueId(isolate()->heap()->free_space_map()),
@@ skipping 749 matching lines @@
     case kBackingStore:
       if (!name_.is_null()) stream->Add(*String::cast(*name_)->ToCString());
       stream->Add("[backing-store]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal