[llvm] [AArch64][CostModel] Lower cost of dupq (SVE2.1) (PR #144918)

[Sander de Smalen via llvm-commits]

================
@@ -29981,7 +29981,8 @@ SDValue AArch64TargetLowering::LowerFixedLengthVECTOR_SHUFFLEToSVE(
           DAG, VT, DAG.getNode(Opc, DL, ContainerVT, Op1, Op1));
     }
 
-    if (Subtarget->hasSVE2p1() || Subtarget->hasSME2p1()) {
+    if (Subtarget->hasSVE2p1() ||
+        (Subtarget->hasSME2p1() && Subtarget->isSVEorStreamingSVEAvailable())) {
----------------
sdesmalen-arm wrote:

Sorry, I should have said `isStreaming()`, i.e.
```suggestion
    if (Subtarget->hasSVE2p1() ||
        (Subtarget->hasSME2p1() && Subtarget->isStreaming())) {
```

https://github.com/llvm/llvm-project/pull/144918