[llvm] expandIS_FPCLASS: Support fcNegative and fcPositive (PR #184788)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp --diff_from_common_commit
``````````

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``````````diff
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 680f96d8c..71275d61e 100644
--- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -9355,8 +9355,10 @@ SDValue TargetLowering::expandIS_FPCLASS(EVT ResultVT, SDValue Op,
           DAG.getNode(ISD::AND, DL, ResultVT, NotNaN, SignBitResult);
     }
 
-    bool IsICmpImmLegal = isLegalICmpImmediate(APInt::getAllOnes(IntVTBits).getZExtValue());
-    if (!NeedFPCompare && (!DAG.isKnownNeverNaN(Op) || IsICmpImmLegal) && Test == fcPositive) {
+    bool IsICmpImmLegal =
+        isLegalICmpImmediate(APInt::getAllOnes(IntVTBits).getZExtValue());
+    if (!NeedFPCompare && (!DAG.isKnownNeverNaN(Op) || IsICmpImmLegal) &&
+        Test == fcPositive) {
       ; // (fcPosInf | fcFinite) has better performance.
     } else if (Test == fcNegative)
       return SignBitResult;

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https://github.com/llvm/llvm-project/pull/184788