[llvm] [X86] computeKnownBitsForTargetNode - add INTRINSIC_WO_CHAIN handling for PSADBW intrinsics (PR #83580)

[Simon Pilgrim via llvm-commits]

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@@ -989,9 +989,7 @@ define dso_local i32 @sad_unroll_nonzero_initial(ptr %arg, ptr %arg1, ptr %arg2,
 ; SSE2-NEXT:    paddd {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm2
 ; SSE2-NEXT:    pshufd {{.*#+}} xmm0 = xmm2[2,3,2,3]
 ; SSE2-NEXT:    paddd %xmm2, %xmm0
-; SSE2-NEXT:    pshufd {{.*#+}} xmm1 = xmm0[1,1,1,1]
-; SSE2-NEXT:    paddd %xmm0, %xmm1
-; SSE2-NEXT:    movd %xmm1, %eax
+; SSE2-NEXT:    movd %xmm0, %eax
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RKSimon wrote:

The X86PartialReduction pass is creating them prior to isel

https://github.com/llvm/llvm-project/pull/83580