[llvm] 723fea2 - Silence 'warning: unused variable' when compiling with Clang 10.0

[Alexandre Ganea via llvm-commits]

Author: Alexandre Ganea
Date: 2020-09-22T12:17:40-04:00
New Revision: 723fea23079f9c85800e5cdc90a75414af182bfd

URL: https://github.com/llvm/llvm-project/commit/723fea23079f9c85800e5cdc90a75414af182bfd
DIFF: https://github.com/llvm/llvm-project/commit/723fea23079f9c85800e5cdc90a75414af182bfd.diff

LOG: Silence 'warning: unused variable' when compiling with Clang 10.0

Added: 
    

Modified: 
    llvm/lib/CodeGen/PeepholeOptimizer.cpp

Removed: 
    


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diff  --git a/llvm/lib/CodeGen/PeepholeOptimizer.cpp b/llvm/lib/CodeGen/PeepholeOptimizer.cpp
index ca9e3cd25caa..4f05468d976b 100644
--- a/llvm/lib/CodeGen/PeepholeOptimizer.cpp
+++ b/llvm/lib/CodeGen/PeepholeOptimizer.cpp
@@ -1413,7 +1413,9 @@ bool PeepholeOptimizer::foldRedundantCopy(
 
   MachineInstr *PrevCopy = CopyMIs.find(SrcPair)->second;
 
+#ifndef NDEBUG
   unsigned PrevSrcSubReg = PrevCopy->getOperand(1).getSubReg();
+#endif
   assert(SrcSubReg == PrevSrcSubReg && "Unexpected mismatching subreg!");
 
   Register PrevDstReg = PrevCopy->getOperand(0).getReg();