RFR: 8301697: [s390] Optimized-build is broken [v3]

[Tyler Steele]

On Mon, 13 Feb 2023 10:45:57 GMT, Amit Kumar <duke at openjdk.org> wrote:

>> This fix guards `__ asm_assert_eq("killed Z_R14", 0)` & `__asm_assert_mem8_is_zero(in_bytes(JavaThread::exception_pc_offset()), Z_thread, "exception pc already set : "FILE_AND_LINE, 0)` with ASSERT because on s390x  `JavaThread::exception_oop_offset()` is always cleared but `JavaThread::exception_pc_offset()` is being cleared only in ASSERT-def, Which is causing the build failure in Optimized-Debug.
>
> Amit Kumar has updated the pull request incrementally with one additional commit since the last revision:
> 
>   reverting extra copyright header updates

Marked as reviewed by tsteele (Committer).

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PR: https://git.openjdk.org/jdk/pull/12400