Version 3.26.31.5 (revert r21509, r21858, r21525)

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index 8c2687ee9c60f93328e6be893c0976dbd1521e02..3231095adba027bac1c756449d4a2c90eb7f5465 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -2419,7 +2419,16 @@ LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) {
   // We need a temporary register for write barrier of the map field.
   LOperand* temp_map = needs_write_barrier_for_map ? TempRegister() : NULL;
 
-  return new(zone()) LStoreNamedField(obj, val, temp, temp_map);
+  LInstruction* result =
+      new(zone()) LStoreNamedField(obj, val, temp, temp_map);
+  if (!instr->access().IsExternalMemory() &&
+      instr->field_representation().IsHeapObject() &&
+      (val->IsConstantOperand()
+       ? HConstant::cast(instr->value())->HasSmiValue()
+       : !instr->value()->type().IsHeapObject())) {
+    result = AssignEnvironment(result);
+  }
+  return result;
 }