[llvm-bugs] [Bug 32915] issue with unsigned long operations. (hweight64)

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=32915

Richard Smith <richard-llvm at metafoo.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |richard-llvm at metafoo.co.uk
         Resolution|---                         |INVALID

--- Comment #1 from Richard Smith <richard-llvm at metafoo.co.uk> ---
u ## x mask = ((u ## x)-1) / ((1 << k) + 1);

This computes 1 << 32 when x is 64 and k is 32, resulting in undefined
behaviour.

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