[llvm-bugs] [Bug 40685] [5, 6, 7, 8, 9 regression] auto-vectorization unpacks, repacks, and unpacks to 32-bit again for count += (bool_arr[i]==0) for boolean array, using 3x the shuffles needed

via llvm-bugs llvm-bugs at lists.llvm.org
Wed Apr 1 02:09:38 PDT 2020


Peter Cordes <peter at cordes.ca> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #6 from Peter Cordes <peter at cordes.ca> ---
(In reply to Sanjay Patel from comment #5)
> No more extra shuffling now, so not sure if we need to keep this bug open:
> https://godbolt.org/z/ern9kc

This bug was just about the insane extra shuffling and can be closed;
fortunately I took the time to report the other missed opts separately as
PR40686 which is still open.

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