[llvm] 76be1a8 - [RISCV] Avoid recreating constants in LowerSelect [nfc] (#155628)

[via llvm-commits]

Author: Philip Reames
Date: 2025-08-27T09:54:24-07:00
New Revision: 76be1a845b867e843a0a58779a35daba64870feb

URL: https://github.com/llvm/llvm-project/commit/76be1a845b867e843a0a58779a35daba64870feb
DIFF: https://github.com/llvm/llvm-project/commit/76be1a845b867e843a0a58779a35daba64870feb.diff

LOG: [RISCV] Avoid recreating constants in LowerSelect [nfc] (#155628)

Added: 
    

Modified: 
    llvm/lib/Target/RISCV/RISCVISelLowering.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index 5bac683ebeabb..774d1abc05592 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -9301,12 +9301,10 @@ SDValue RISCVTargetLowering::lowerSELECT(SDValue Op, SelectionDAG &DAG) const {
                          getCost(TrueVal - FalseVal, FalseVal);
       SDValue LHSVal = DAG.getConstant(
           IsCZERO_NEZ ? FalseVal - TrueVal : TrueVal - FalseVal, DL, VT);
-      SDValue RHSVal =
-          DAG.getConstant(IsCZERO_NEZ ? TrueVal : FalseVal, DL, VT);
       SDValue CMOV =
           DAG.getNode(IsCZERO_NEZ ? RISCVISD::CZERO_NEZ : RISCVISD::CZERO_EQZ,
                       DL, VT, LHSVal, CondV);
-      return DAG.getNode(ISD::ADD, DL, VT, CMOV, RHSVal);
+      return DAG.getNode(ISD::ADD, DL, VT, CMOV, IsCZERO_NEZ ? TrueV : FalseV);
     }
 
     // (select c, c1, t) -> (add (czero_nez t - c1, c), c1)