RFR: 8350609: Cleanup unknown unwind opcode (0xB) for windows

[Emanuel Peter]

On Thu, 20 Feb 2025 03:58:17 GMT, Dhamoder Nalla <dhanalla at openjdk.org> wrote:

> This PR is to clean-up unknown unwind opcodes (0xB) in Windows intrinsic functions introduced in commit https://github.com/openjdk/jdk17u-dev/commit/9f05c411e6d6bdf612cf0cf8b9fe4ca9ecde50d1#diff-a024df6bcd94607260545e647922261703a652dee1afadb1fa758f6e74a568d1
> 
> ![image](https://github.com/user-attachments/assets/5b295365-ba8e-4fd6-8b8b-f7243f80a496)
> 
> According to the Windows unwind Opcodes outlined at https://learn.microsoft.com/en-us/cpp/build/exception-handling-x64?view=msvc-170#unwind-operation-code, the opcode 0xB (1011) is not a valid Opcode, as the valid opcodes range from 0 to 10.
> 
> Test performed:
> 1.  tier1 tests
> 2.  Vector tests under /test/jdk/incubator/vector

Testing passed. The patch looks reasonable :)

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Marked as reviewed by epeter (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/23707#pullrequestreview-2710247828