[llvm-bugs] [Bug 32790] [AVX] partly-implemented 256-bit ISA leads to codegen problems

via llvm-bugs llvm-bugs at lists.llvm.org
Fri May 26 08:48:19 PDT 2017


Sanjay Patel <spatel+llvm at rotateright.com> changed:

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

--- Comment #3 from Sanjay Patel <spatel+llvm at rotateright.com> ---
Should be fixed after:

$ ./llc -o - -mattr=avx 32790.ll 
        vpaddd  %xmm1, %xmm0, %xmm4
        vextractf128    $1, %ymm1, %xmm1
        vextractf128    $1, %ymm0, %xmm0
        vpaddd  %xmm1, %xmm0, %xmm0
        vextractf128    $1, %ymm2, %xmm1
        vpand   %xmm1, %xmm0, %xmm0    <--- narrow logic op
        vextractf128    $1, %ymm3, %xmm1
        vpsubd  %xmm1, %xmm0, %xmm0
        vpand   %xmm2, %xmm4, %xmm1    <--- narrow logic op
        vpsubd  %xmm3, %xmm1, %xmm1
        vinsertf128     $1, %xmm0, %ymm1, %ymm0

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