[llvm] 2214026 - [CodeGen] Fix -Wunused-variable in RegisterCoalescer.cpp (NFC)

[Jie Fu via llvm-commits]

Author: Jie Fu
Date: 2023-10-02T18:38:45+08:00
New Revision: 2214026e957397cc6385f778b28d570485a31856

URL: https://github.com/llvm/llvm-project/commit/2214026e957397cc6385f778b28d570485a31856
DIFF: https://github.com/llvm/llvm-project/commit/2214026e957397cc6385f778b28d570485a31856.diff

LOG: [CodeGen] Fix -Wunused-variable in RegisterCoalescer.cpp (NFC)

/llvm-project/llvm/lib/CodeGen/RegisterCoalescer.cpp:1320:18: error: unused variable 'DefSubIdx' [-Werror,-Wunused-variable]
  const unsigned DefSubIdx = DefMI->getOperand(0).getSubReg();
                 ^
1 error generated.

Added: 
    

Modified: 
    llvm/lib/CodeGen/RegisterCoalescer.cpp

Removed: 
    


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diff  --git a/llvm/lib/CodeGen/RegisterCoalescer.cpp b/llvm/lib/CodeGen/RegisterCoalescer.cpp
index 53bc7de8b388651..9410944705c1c89 100644
--- a/llvm/lib/CodeGen/RegisterCoalescer.cpp
+++ b/llvm/lib/CodeGen/RegisterCoalescer.cpp
@@ -1317,7 +1317,7 @@ bool RegisterCoalescer::reMaterializeTrivialDef(const CoalescerPair &CP,
   if (SrcIdx && DstIdx)
     return false;
 
-  const unsigned DefSubIdx = DefMI->getOperand(0).getSubReg();
+  [[maybe_unused]] const unsigned DefSubIdx = DefMI->getOperand(0).getSubReg();
   const TargetRegisterClass *DefRC = TII->getRegClass(MCID, 0, TRI, *MF);
   if (!DefMI->isImplicitDef()) {
     if (DstReg.isPhysical()) {