[llvm] [AArch64][SVE] Add dot product lowering for PARTIAL_REDUCE_MLA node (PR #130933)

[Benjamin Maxwell via llvm-commits]

================
@@ -1585,6 +1585,26 @@ AArch64TargetLowering::AArch64TargetLowering(const TargetMachine &TM,
       setOperationAction(ISD::MSTORE, VT, Custom);
     }
 
+    if (EnablePartialReduceNodes) {
+      for (MVT VT : MVT::integer_scalable_vector_valuetypes()) {
+        for (MVT InnerVT : MVT::integer_scalable_vector_valuetypes()) {
----------------
MacDue wrote:


I think you should be able to do:

```c++
  auto IntegerVectorVTs = concat<MVT>(MVT::integer_scalable_vector_valuetypes(),
                                 MVT::integer_fixedlen_vector_valuetypes());
  for (MVT VT : IntegerVectorVTs) {
    for (MVT InnerVT : IntegerVectorVTs) {
      // ...
    }
  }
```
to resolve the errors

https://github.com/llvm/llvm-project/pull/130933