[llvm] [AArch64][SVE] Add AArch64ISD nodes for wide add instructions (PR #115895)

[Paul Walker via llvm-commits]

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@@ -3674,10 +3690,10 @@ let Predicates = [HasSVE2orSME] in {
   defm UABDLT_ZZZ : sve2_wide_int_arith_long<0b01111, "uabdlt", int_aarch64_sve_uabdlt>;
 
   // SVE2 integer add/subtract wide
-  defm SADDWB_ZZZ : sve2_wide_int_arith_wide<0b000, "saddwb", int_aarch64_sve_saddwb>;
-  defm SADDWT_ZZZ : sve2_wide_int_arith_wide<0b001, "saddwt", int_aarch64_sve_saddwt>;
-  defm UADDWB_ZZZ : sve2_wide_int_arith_wide<0b010, "uaddwb", int_aarch64_sve_uaddwb>;
-  defm UADDWT_ZZZ : sve2_wide_int_arith_wide<0b011, "uaddwt", int_aarch64_sve_uaddwt>;
+  defm SADDWB_ZZZ : sve2_wide_int_arith_wide<0b000, "saddwb", AArch64saddwb>;
+  defm SADDWT_ZZZ : sve2_wide_int_arith_wide<0b001, "saddwt", AArch64saddwt>;
+  defm UADDWB_ZZZ : sve2_wide_int_arith_wide<0b010, "uaddwb", AArch64uaddwb>;
+  defm UADDWT_ZZZ : sve2_wide_int_arith_wide<0b011, "uaddwt", AArch64uaddwt>;
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paulwalker-arm wrote:

FYI: The style in this PR is the preferred approach.  At the point where there's value in having a dedicated ISD node it's preferable to use this for all code paths (i.e. to lower the intrinsics to the same node) so that all paths can take advantage of any future DAG combines.

https://github.com/llvm/llvm-project/pull/115895