[llvm] [NVPTX] Rework and cleanup FTZ ISel (PR #146410)

[Alex MacLean via llvm-commits]

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@@ -397,45 +403,29 @@ static unsigned getPTXCmpMode(const CondCodeSDNode &CondCode, bool FTZ) {
       return CmpMode::LEU;
     case ISD::SETUNE:
       return CmpMode::NEU;
-    case ISD::SETEQ:
-      return CmpMode::EQ;
-    case ISD::SETGT:
-      return CmpMode::GT;
-    case ISD::SETGE:
-      return CmpMode::GE;
-    case ISD::SETLT:
-      return CmpMode::LT;
-    case ISD::SETLE:
-      return CmpMode::LE;
-    case ISD::SETNE:
-      return CmpMode::NE;
     }
   }(CondCode.get());
-
-  if (FTZ)
-    PTXCmpMode |= NVPTX::PTXCmpMode::FTZ_FLAG;
-
-  return PTXCmpMode;
+  return CurDAG->getTargetConstant(PTXCmpMode, SDLoc(), MVT::i32);
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AlexMaclean wrote:

Since we know that this is just going to be an operand within another instructions there is no point adding a debug-loc.

https://github.com/llvm/llvm-project/pull/146410