[LLVMdev] LowerINTRINSIC_W_CHAIN in X86

[Anton Korobeynikov]

Hello

Chain operand is needed if the intrinsic is reading / writing memory.

On Wed, Jul 23, 2014 at 8:02 PM, kewuzhang <kewu.zhang at amd.com> wrote:
> Hi guys,
>
> In X86ISelLowering.cpp
>
> I saw”
> ...
>  case Intrinsic::x86_rdrand_16:
>   case Intrinsic::x86_rdrand_32:
> ….
> case Intrinsic::x86_avx512_gather_qpd_512:
>   case Intrinsic::x86_avx512_gather_qps_512:
> ..
> “
> those intrinsics are handled by “LowerINTRINSIC_W_CHAIN”.
>
> How the “INTRINSIC_W_CHAIN” opCode is set instead of “INTRINSIC_WO_CHAIN”?
>
> tks
>
> Kevin
>
>
>
>
>
>
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-- 
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University