[LLVMbugs] [Bug 22301] Using __builtin_ia32_pshufb128 causes "fatal error: error in backend: Cannot select: 0x3e5d580: v16i8 = X86ISD::PSHUFB"

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Fri Jan 23 09:12:54 PST 2015


Eric Christopher <echristo at gmail.com> changed:

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

--- Comment #1 from Eric Christopher <echristo at gmail.com> ---
You need to use -mssse3 to enable the instruction. There's no error checking on
builtins. If you use the intrinsic _mm_shuffle_epi8 then you'll get error
checking at the moment (after including tmmintrin.h).

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