[llvm] [SelectionDAG][AArch64] Add dot product lowering in NEON for PARTIAL_REDUCE_*MLA ISD nodes (PR #140075)

[Sander de Smalen via llvm-commits]

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@@ -948,3 +1295,5 @@ end:
   %2 = add <4 x i32> %psum2, %psum1
   ret <4 x i32> %2
 }
+;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
+; CHECK-I8MM: {{.*}}
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sdesmalen-arm wrote:

The note is still here which means that CHECK-I8MM is not used anywhere. My suggestion would be to keep CHECK-I8MM in the RUN line, and use CHECK-NEWLOWERING-I8MM for the new RUN line you added.

https://github.com/llvm/llvm-project/pull/140075