[llvm-bugs] [Bug 50795] [SIMD] __builtin_popcount in loop with 8-bit type should generate i8x16.popcnt

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=50795

Thomas Lively <tlively at google.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
             Status|NEW                         |RESOLVED
                 CC|                            |tlively at google.com

--- Comment #3 from Thomas Lively <tlively at google.com> ---
This vectorizes correctly if the input and result vectors are replaced with
arrays. Apparently the vectorizer does not work with non-int, non-pointer PHIs,
which is why the loop vector has to be an array, and it also doesn't work with
extractelement instructions. Unless I missed a way for the backend to relax
these restrictions, this seems to be working as intended in the WebAssembly
backend since
https://reviews.llvm.org/rG8af333cf1a77f72ed3ccf14afa96a4f8f12e40c4.

Will mark WAI for now, but happy to revisit this if I missed something.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20210726/603f786c/attachment.html>