[llvm] [NVPTX] Fix lowering of i1 SETCC (PR #115035)

[Alex MacLean via llvm-commits]

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@@ -2666,6 +2667,46 @@ SDValue NVPTXTargetLowering::LowerShiftLeftParts(SDValue Op,
   }
 }
 
+// Lowers SETCC nodes that aren't directly supported by our arch.
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AlexMaclean wrote:

Okay, I've update the code to use the CondCode table. Not sure if this is what you had in mind though, I don't think it has made the implementation significantly simpler. I also did have to update a couple uses of the table which seemed incorrect. 

@arsenm does this look better?

https://github.com/llvm/llvm-project/pull/115035