[llvm] [X86][AVX512] Use comx for compare (PR #113567)

[Phoebe Wang via llvm-commits]

================
@@ -218,10 +218,14 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
   setTruncStoreAction(MVT::f64, MVT::f32, Expand);
 
   // SETOEQ and SETUNE require checking two conditions.
-  for (auto VT : {MVT::f32, MVT::f64, MVT::f80}) {
-    setCondCodeAction(ISD::SETOEQ, VT, Expand);
-    setCondCodeAction(ISD::SETUNE, VT, Expand);
+  for (auto VT : {MVT::f32, MVT::f64}) {
+    setCondCodeAction(ISD::SETOEQ, VT,
+                      Subtarget.hasAVX10_2() ? Custom : Expand);
+    setCondCodeAction(ISD::SETUNE, VT,
+                      Subtarget.hasAVX10_2() ? Custom : Expand);
   }
+  setCondCodeAction(ISD::SETOEQ, MVT::f80, Expand);
+  setCondCodeAction(ISD::SETUNE, MVT::f80, Expand);
----------------
phoebewang wrote:

You can leave it as is and override later with
```
if (Subtarget.hasAVX10_2()) {
  for (auto VT : {MVT::f16, MVT::f32, MVT::f64}) {
    ...
}
```

https://github.com/llvm/llvm-project/pull/113567