[llvm] r289371 - [AVX-512][InstCombine] Teach InstCombineCalls how to simplify demanded for scalar cmp intrinsics with masking and rounding.

[Chandler Carruth via llvm-commits]

No test case?

On Sat, Dec 10, 2016 at 11:52 PM Craig Topper via llvm-commits <
llvm-commits at lists.llvm.org> wrote:

> Author: ctopper
> Date: Sun Dec 11 01:42:04 2016
> New Revision: 289371
>
> URL: http://llvm.org/viewvc/llvm-project?rev=289371&view=rev
> Log:
> [AVX-512][InstCombine] Teach InstCombineCalls how to simplify demanded for
> scalar cmp intrinsics with masking and rounding.
>
> These intrinsics don't read the upper elements of their first and second
> input. These are slightly different the the SSE version which does use the
> upper bits of its first element as passthru bits since the result goes to
> an XMM register. For AVX-512 the result goes to a mask register instead.
>
> Modified:
>     llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp
>
> Modified: llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp?rev=289371&r1=289370&r2=289371&view=diff
>
> ==============================================================================
> --- llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp (original)
> +++ llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp Sun Dec 11
> 01:42:04 2016
> @@ -1738,7 +1738,9 @@ Instruction *InstCombiner::visitCallInst
>    case Intrinsic::x86_sse2_ucomigt_sd:
>    case Intrinsic::x86_sse2_ucomile_sd:
>    case Intrinsic::x86_sse2_ucomilt_sd:
> -  case Intrinsic::x86_sse2_ucomineq_sd: {
> +  case Intrinsic::x86_sse2_ucomineq_sd:
> +  case Intrinsic::x86_avx512_mask_cmp_ss:
> +  case Intrinsic::x86_avx512_mask_cmp_sd: {
>      // These intrinsics only demand the 0th element of their input
> vectors. If
>      // we can simplify the input based on that, do so now.
>      bool MadeChange = false;
>
>
> _______________________________________________
> llvm-commits mailing list
> llvm-commits at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20161211/161dc4cc/attachment.html>