[llvm] [AArch64][SVE] Add unpacked fp ISel patterns for clastb (PR #185688)

[Benjamin Maxwell via llvm-commits]

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@@ -577,4 +577,29 @@ define i8 @extract_last_active_split(<vscale x 32 x i8> %data, <vscale x 32 x i1
   ret i8 %res
 }
 
+define half @extract_last_active_unpacked_fp_nxv4f16(<vscale x 4 x half> %0, <vscale x 4 x i1> %mask, half %passthru) #0 {
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MacDue wrote:

Missing test checks.

https://github.com/llvm/llvm-project/pull/185688