[llvm] [AArch64] Lower alias mask to a whilewr (PR #100769)

[Sam Tebbs via llvm-commits]

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@@ -0,0 +1,884 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
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SamTebbs33 wrote:

Yeah I've moved these to whilewr.ll .

https://github.com/llvm/llvm-project/pull/100769