Version 3.26.31.5 (revert r21509, r21858, r21525)

src/mips/lithium-mips.cc

Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index 56e15119434b07777314d06eabdc0222cd5a59ae..e882655d21501d6cf94718cdff670f5a457ed6b2 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -2248,7 +2248,13 @@ LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) {
   // We need a temporary register for write barrier of the map field.
   LOperand* temp = needs_write_barrier_for_map ? TempRegister() : NULL;
 
-  return new(zone()) LStoreNamedField(obj, val, temp);
+  LInstruction* result = new(zone()) LStoreNamedField(obj, val, temp);
+  if (!instr->access().IsExternalMemory() &&
+      instr->field_representation().IsHeapObject() &&
+      !instr->value()->type().IsHeapObject()) {
+    result = AssignEnvironment(result);
+  }
+  return result;
 }