[clang] [llvm] [AArch64] Add intrinsic support for Fdot instr. (PR #189987)

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@@ -6699,6 +6699,13 @@ multiclass SIMDThreeSameVectorFDot<string asm, SDPatternOperator OpNode = null_f
                                          v2f32, v4f16, OpNode>;
   def v8f16_v4f32 : BaseSIMDThreeSameVectorDot<1, 0, 0b10, 0b1111, asm, ".4s", ".8h", V128,
                                          v4f32, v8f16, OpNode>;
+
+  def : Pat<(v2f32 (int_aarch64_neon_fdot (v2f32 V64:$Rd),
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Lukacma wrote:

I am not sure about the purpose ? We cannot really do this optimization for Fdot can we ? Introducing these nodes only makes sense if you plan to do optimazations imo, which are beyond the scope of this patch anyway I think ? 

https://github.com/llvm/llvm-project/pull/189987