Strict Mode assignment to read only property.

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 c7424a586b2cd2c61e7ff718513bcf9f00f56485..8fab7ce94078dcd51bb4b2af5cf4bc8259cb8412 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -2786,7 +2786,9 @@ void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) {
   ASSERT(ToRegister(instr->value()).is(eax));
 
   __ mov(ecx, instr->name());
-  Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
+  Handle<Code> ic(Builtins::builtin(
+      info_->is_strict() ? Builtins::StoreIC_Initialize_Strict
+                         : Builtins::StoreIC_Initialize));
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
 }
 
@@ -2854,7 +2856,9 @@ void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
   ASSERT(ToRegister(instr->key()).is(ecx));
   ASSERT(ToRegister(instr->value()).is(eax));
 
-  Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize));
+  Handle<Code> ic(Builtins::builtin(
+      info_->is_strict() ? Builtins::KeyedStoreIC_Initialize_Strict
+                         : Builtins::KeyedStoreIC_Initialize));
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
 }