[llvm] [LLVM][AArch64][tblgen]: Match clamp pattern (PR #75529)

[Paul Walker via llvm-commits]

================
@@ -470,6 +470,12 @@ class SVE_2_Op_Pred_All_Active<ValueType vtd, SDPatternOperator op,
 : Pat<(vtd (op (pt (SVEAllActive)), vt1:$Op1, vt2:$Op2)),
       (inst $Op1, $Op2)>;
 
+class SVE_3_Op_Pred_All_Active<ValueType vtd, SDPatternOperator op,
+                               ValueType vt1, ValueType pt, ValueType vt2,
+                               ValueType vt3, Instruction inst>
+: Pat<(vtd (op (pt (SVEAllActive)), vt1:$Op1, vt2:$Op2, vt3:$Op3)),
+      (inst $Op1, $Op2, $Op3)>;
+
----------------
paulwalker-arm wrote:

This class is no longer required and can be removed?

https://github.com/llvm/llvm-project/pull/75529