[libcxx-commits] [libcxx] [libc++][test][msan] Fix bots after #67799 (PR #73152)

[Louis Dionne via libcxx-commits]

ldionne wrote:

@huixie90 This smells awfully like the padding bytes issue for `long double`, no? What else would make the compare exchange weak fail all the time? If so, we could consider disabling these tests for `long double` entirely until the Clang support isn't completely broken. This is actually kinda dangerous right now, people might be writing code using `atomic<long double>` and expecting it to work, when in reality it doesn't work properly and hasn't for probably 10 years.

https://github.com/llvm/llvm-project/pull/73152