[llvm] [AArch64] Improve scalar and Neon popcount with SVE CNT. (PR #143870)

[Ricardo Jesus via llvm-commits]

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@@ -10614,13 +10614,13 @@ SDValue AArch64TargetLowering::LowerCTPOP_PARITY(SDValue Op,
     return SDValue();
 
   EVT VT = Op.getValueType();
-  if (VT.isScalableVector() ||
-      useSVEForFixedLengthVectorVT(VT, !Subtarget->isNeonAvailable()))
+  assert((!Subtarget->isNeonAvailable() ||
+          (VT != MVT::v8i8 && VT != MVT::v16i8)) &&
+         "Unexpected custom lowering for B vectors with Neon available.");
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rj-jesus wrote:

Thanks, I've removed this assert. I wanted to ensure we didn't attempt to lower NEON byte vectors with SVE when NEON is available, but you're right, this can be checked via tests!

https://github.com/llvm/llvm-project/pull/143870