[libcxx-commits] [PATCH] D134625: Summary:bug fix! Rotation direction on `__countl_zero()`probably unnoticed because only affects rare cases(does not affect 128 bit ints because rotation is effectively swap)(does not affect integers of sizes less or equal to 64bits)

[Armando Martín via Phabricator via libcxx-commits]

Delta-dev-99 added a comment.

I was playing with the core libraries and details of C++ and tried compiling and running programs without standard libraries and with custom versions of standard library.
I was implementing bit operations and decided to take a look at llvm's implementation to compare with my own. I had a very similar idea, but the rotation direction was different on libcxx.
That's how I found it. I didn't had a test case.


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https://reviews.llvm.org/D134625