Fix reintroduction of global variables that have been deleted.

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 3bfb10f80e8afc4e15ff2cbd9012f41d2f403823..6c0512cccb167a74c59cc1729f31094851483db0 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -1908,7 +1908,17 @@ void LCodeGen::DoLoadGlobal(LLoadGlobal* instr) {
 
 void LCodeGen::DoStoreGlobal(LStoreGlobal* instr) {
   Register value = ToRegister(instr->InputAt(0));
-  __ mov(Operand::Cell(instr->hydrogen()->cell()), value);
+  Operand cell_operand = Operand::Cell(instr->hydrogen()->cell());
+
+  // If the cell we are storing to contains the hole it could have
+  // been deleted from the property dictionary. In that case, we need
+  // to update the property details in the property dictionary to mark
+  // it as no longer deleted. We deoptimize in that case.
+  __ cmp(cell_operand, Factory::the_hole_value());
+  DeoptimizeIf(equal, instr->environment());
+
+  // Store the value.
+  __ mov(cell_operand, value);
 }