[llvm] [X86] Fast AVX-512-VNNI vpdpwssd tuning (PR #85033)

[Phoebe Wang via llvm-commits]

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@@ -0,0 +1,15 @@
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=znver4 | FileCheck %s
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+
+define <16 x i32> @vpdpwssd_test(<16 x i32> %0, <16 x i32> %1, <16 x i32> %2) {
+; CHECK-LABEL: vpdpwssd_test:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vpdpwssd %zmm2, %zmm1, %zmm0
+; CHECK-NEXT:    retq
+  %4 = tail call <16 x i32> @llvm.x86.avx512.vpdpwssd.512(<16 x i32> %0, <16 x i32> %1, <16 x i32> %2)
+  ret <16 x i32> %4
+}
+
+declare <16 x i32> @llvm.x86.avx512.vpdpwssd.512(<16 x i32>, <16 x i32>, <16 x i32>) #1
+
+attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(none) }
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phoebewang wrote:

Not needed

https://github.com/llvm/llvm-project/pull/85033