[8u] Apache Spark workloads failures: no mismatched stores, except on raw memory

[Roland Westrelin]

> I don't understand, here it is in 8u:
>
>   8140309: [REDO] failed: no mismatched stores, except on raw memory: StoreB StoreI
>   Summary: Mismatched stores on same slice possible with Unsafe.Put*Unaligned methods
>   Reviewed-by: kvn, thartmann
>
>   http://hg.openjdk.java.net/jdk8u/jdk8u-dev/hotspot/rev/0ffee573412b

Ah. That piece was not backported:

@@ -2393,7 +2400,8 @@
              st->Opcode() == Op_StoreVector ||
              Opcode() == Op_StoreVector ||
              phase->C->get_alias_index(adr_type()) == Compile::AliasIdxRaw ||
-             (Opcode() == Op_StoreL && st->Opcode() == Op_StoreI), // expanded ClearArrayNode
+             (Opcode() == Op_StoreL && st->Opcode() == Op_StoreI) || // expanded ClearArrayNode
+             (is_mismatched_access() || st->as_Store()->is_mismatched_access()),
              "no mismatched stores, except on raw memory: %s %s", NodeClassNames[Opcode()], NodeClassNames[st->Opcode()]);
 
       if (st->in(MemNode::Address)->eqv_uncast(address) &&

Roland.