[llvm] [X86][StrictFP] Combine fcmp + select to fmin/fmax for some predicates (PR #109512)

[Andy Kaylor via llvm-commits]

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@@ -46494,17 +46496,22 @@ static SDValue combineSelect(SDNode *N, SelectionDAG &DAG,
   // x<=y?x:y, because of how they handle negative zero (which can be
   // ignored in unsafe-math mode).
   // We also try to create v2f32 min/max nodes, which we later widen to v4f32.
-  if (Cond.getOpcode() == ISD::SETCC && VT.isFloatingPoint() &&
-      VT != MVT::f80 && VT != MVT::f128 && !isSoftF16(VT, Subtarget) &&
-      (TLI.isTypeLegal(VT) || VT == MVT::v2f32) &&
+  if ((Cond.getOpcode() == ISD::SETCC ||
+       Cond.getOpcode() == ISD::STRICT_FSETCC ||
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andykaylor wrote:

I don't think you can do this with STRICT_FSETCC because the SSE min/max instructions signal on quiet NaNs.

https://github.com/llvm/llvm-project/pull/109512