[llvm] [Xtensa] Implement Xtensa Floating Point Option. (PR #136086)

[Matt Arsenault via llvm-commits]

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@@ -71,6 +75,8 @@ XtensaTargetLowering::XtensaTargetLowering(const TargetMachine &TM,
 
   setOperationAction(ISD::Constant, MVT::i32, Custom);
   setOperationAction(ISD::Constant, MVT::i64, Expand);
+  setOperationAction(ISD::ConstantFP, MVT::f32, Custom);
+  setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
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arsenm wrote:

The custom looks the same as default expand 

https://github.com/llvm/llvm-project/pull/136086