[llvm] [AArch64] recognise zip1/zip2 with flipped operands (PR #167235)

[Philip Ginsbach-Chen via llvm-commits]

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@@ -6623,34 +6623,49 @@ inline unsigned getPerfectShuffleCost(llvm::ArrayRef<int> M) {
 
 /// Return true for zip1 or zip2 masks of the form:
 ///  <0,  8, 1,  9, 2, 10, 3, 11> or
-///  <4, 12, 5, 13, 6, 14, 7, 15>
+///  <4, 12, 5, 13, 6, 14, 7, 15> or
+///  <8,  0, 9,  1, 10, 2, 11, 3> or
+///  <12, 4, 13, 5, 14, 6, 15, 7>
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ginsbach wrote:

Done in commit 4.

https://github.com/llvm/llvm-project/pull/167235