[llvm] 5773adb - SelectionDAG: Remove unneeded getSelectCC in expandFMINIMUMNUM_FMAXIMUMNUM (#107416)

[via llvm-commits]

Author: YunQiang Su
Date: 2024-09-11T09:53:04+08:00
New Revision: 5773adb0bfb72249fde00f1e4a02dc3f583d41c3

URL: https://github.com/llvm/llvm-project/commit/5773adb0bfb72249fde00f1e4a02dc3f583d41c3
DIFF: https://github.com/llvm/llvm-project/commit/5773adb0bfb72249fde00f1e4a02dc3f583d41c3.diff

LOG: SelectionDAG: Remove unneeded getSelectCC in expandFMINIMUMNUM_FMAXIMUMNUM (#107416)

ISD::FCANONICALIZE is enough, which can process NaN or non-NaN
correctly, thus getSelectCC is not needed here.

Added: 
    

Modified: 
    llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp

Removed: 
    


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diff  --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index b3307dc9b77304..03010c1df00145 100644
--- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -8616,10 +8616,7 @@ SDValue TargetLowering::expandFMINIMUMNUM_FMAXIMUMNUM(SDNode *Node,
   // If MinMax is NaN, let's quiet it.
   if (!Flags.hasNoNaNs() && !DAG.isKnownNeverNaN(LHS) &&
       !DAG.isKnownNeverNaN(RHS)) {
-    SDValue MinMaxQuiet =
-        DAG.getNode(ISD::FCANONICALIZE, DL, VT, MinMax, Flags);
-    MinMax =
-        DAG.getSelectCC(DL, MinMax, MinMax, MinMaxQuiet, MinMax, ISD::SETUO);
+    MinMax = DAG.getNode(ISD::FCANONICALIZE, DL, VT, MinMax, Flags);
   }
 
   // Fixup signed zero behavior.