Fix reintroduction of global variables that have been deleted.

src/arm/lithium-arm.cc

 // Copyright 2011 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 1584 matching lines @@
 
 LInstruction* LChunkBuilder::DoLoadGlobal(HLoadGlobal* instr) {
   LLoadGlobal* result = new LLoadGlobal();
   return instr->check_hole_value()
       ? AssignEnvironment(DefineAsRegister(result))
       : DefineAsRegister(result);
 }
 
 
 LInstruction* LChunkBuilder::DoStoreGlobal(HStoreGlobal* instr) {
-  return new LStoreGlobal(UseRegisterAtStart(instr->value()));
+  if (instr->check_hole_value()) {
+    LOperand* temp = TempRegister();
+    LOperand* value = UseRegister(instr->value());
+    return AssignEnvironment(new LStoreGlobal(value, temp));
+  } else {
+    LOperand* value = UseRegisterAtStart(instr->value());
+    return new LStoreGlobal(value, NULL);
+  }
 }
 
 
 LInstruction* LChunkBuilder::DoLoadContextSlot(HLoadContextSlot* instr) {
   return DefineAsRegister(new LLoadContextSlot);
 }
 
 
 LInstruction* LChunkBuilder::DoLoadNamedField(HLoadNamedField* instr) {
   return DefineAsRegister(
@@ skipping 243 matching lines @@
 
 
 LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
   HEnvironment* outer = current_block_->last_environment()->outer();
   current_block_->UpdateEnvironment(outer);
   return NULL;
 }
 
 
 } }  // namespace v8::internal