[llvm] [AArch64][GlobalISel] Perfect Shuffles (PR #106446)

[Dhruv Chawla via llvm-commits]

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@@ -129,6 +129,13 @@ def shuf_to_ins: GICombineRule <
   (apply [{ applyINS(*${root}, MRI, B, ${matchinfo}); }])
 >;
 
+def perfect_shuffle: GICombineRule <
+  (defs root:$root),
+  (match (wip_match_opcode G_SHUFFLE_VECTOR):$root,
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dc03-work wrote:

Please avoid using `wip_match_opcode`.

https://github.com/llvm/llvm-project/pull/106446