[llvm-bugs] [Bug 30506] <intrin.h> does not declare _tzcnt_u32

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=30506

Simon Pilgrim <llvm-dev at redking.me.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |llvm-dev at redking.me.uk
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #7 from Simon Pilgrim <llvm-dev at redking.me.uk> ---
If we're going to allow general use of the tzcnt intrinsics like this, then
their doxygen comments need to be updated to be very clear that if TZCNT isn't
available then the result of __tzcnt_u32(0) is undefined.

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