[llvm] [AMDGPU] Emit S_CBRANCH_SCC for floating-point conditions. (PR #120588)

[Jay Foad via llvm-commits]

================
@@ -2390,12 +2390,14 @@ bool AMDGPUDAGToDAGISel::isCBranchSCC(const SDNode *N) const {
     return true;
 
   if (VT == MVT::i64) {
-    const auto *ST = static_cast<const GCNSubtarget *>(Subtarget);
-
     ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
-    return (CC == ISD::SETEQ || CC == ISD::SETNE) && ST->hasScalarCompareEq64();
+    return (CC == ISD::SETEQ || CC == ISD::SETNE) &&
+           Subtarget->hasScalarCompareEq64();
   }
 
+  if ((VT == MVT::f16 || VT == MVT::f32) && ST->hasSALUFloatInsts())
----------------
jayfoad wrote:

```suggestion
  if ((VT == MVT::f16 || VT == MVT::f32) && Subtarget->hasSALUFloatInsts())
```

https://github.com/llvm/llvm-project/pull/120588