[llvm] [AArch64] Add Neon USDOT support (PR #143525)

[Sander de Smalen via llvm-commits]

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@@ -1464,6 +1464,16 @@ AArch64TargetLowering::AArch64TargetLowering(const TargetMachine &TM,
       setPartialReduceMLAAction(MLAOps, MVT::v4i32, MVT::v16i8, Legal);
       setPartialReduceMLAAction(MLAOps, MVT::v2i32, MVT::v8i8, Legal);
       setPartialReduceMLAAction(MLAOps, MVT::v2i64, MVT::v16i8, Custom);
+
+      if (Subtarget->hasMatMulInt8()) {
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sdesmalen-arm wrote:

Can we do a similar thing for fixed-length SVE, similar to what was done for #142032 ?

https://github.com/llvm/llvm-project/pull/143525