[clang] [llvm] [X86][APX] Emit SetZUCC instead of legacy setcc when ZU is enabled (PR #173965)

[Phoebe Wang via llvm-commits]

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@@ -150,10 +152,14 @@ let Uses = [EFLAGS], isCodeGenOnly = 1, ForceDisassemble = 1 in {
 
 // SetZUCC and promoted SetCC instructions.
 let Uses = [EFLAGS], isCodeGenOnly = 1, ForceDisassemble = 1,
-  hasSideEffects = 0, Predicates = [In64BitMode] in {
+  hasSideEffects = 0, Predicates = [In64BitMode], Predicates = [PreferSetZUCC] in {
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phoebewang wrote:

```suggestion
  hasSideEffects = 0, Predicates = [In64BitMode, PreferSetZUCC] in
```

https://github.com/llvm/llvm-project/pull/173965