[llvm-bugs] [Bug 44781] Poor use of SIMD reduction

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=44781

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Fixed By Commit(s)|                            |82de01895455
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #4 from Simon Pilgrim <llvm-dev at redking.me.uk> ---
(In reply to Simon Pilgrim from comment #3)
> We can use ptest for this much more efficiently: https://godbolt.org/z/wDH426
> 
> .LCPI0_0:
>   .quad 1095216660735 # 0xff000000ff
>   .quad 1095216660735 # 0xff000000ff
> _Z5checkRK3Box: # @_Z5checkRK3Box
>   vmovdqu (%rdi), %xmm0
>   vptest .LCPI0_0(%rip), %xmm0
>   sete %al
>   retq

Resolving - we use PTEST since 82de01895455

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