RFR: 8253970: Build error: address argument to atomic builtin must be a pointer to integer or pointer ('volatile narrowOop *' invalid)

[Kim Barrett]

On Sat, 3 Oct 2020 13:29:03 GMT, Jie Fu <jiefu at openjdk.org> wrote:

> __sync_val_compare_and_swap shouldn't call with narrowOop* for clang after JDK-8247912.
> Before passing type T to __sync_val_compare_and_swap, the fix converts T to uint32_t* if sizeof(T) == 4.
> 
> Testing:
>  - Zero VM build on Linux and MacOS with clang
>  - Zero VM build on Linux with gcc

No, don't make this change.  Something else is going wrong here.  The Platform layer shouldn't be called with enum
types; the higher level platform-independent layer should have canonicalized such to the associated underlying integral
types.

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PR: https://git.openjdk.java.net/jdk/pull/496