[llvm] [SPARC][IAS] Add `setuw` alias for `set` (PR #125149)

[Sergei Barannikov via llvm-commits]

================
@@ -605,6 +605,8 @@ def : InstAlias<"unimp", (UNIMP 0), 0>;
 // interchangeable with `unimp` all the time.
 def : MnemonicAlias<"illtrap", "unimp">;
 
+def : MnemonicAlias<"setuw", "set">;
----------------
s-barannikov wrote:

Should have HasV9 predicate? V8 manual doesn't list this instruction.

https://github.com/llvm/llvm-project/pull/125149