[GlobalIsel] Fix another "unused variable" warning

diff --git a/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
index 7729702acc78d892ad2c531c386b6366a06889aa..ef5cb1c16309073b8ca7b889f073b7aa7c6f479f 100644 (file)
--- a/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
@@ -4638,6 +4638,7 @@ bool CombinerHelper::matchMulOBy0(MachineInstr &MI, BuildFnTy &MatchInfo) {
 bool CombinerHelper::matchAddOBy0(MachineInstr &MI, BuildFnTy &MatchInfo) {
   // (G_*ADDO x, 0) -> x + no carry out
   unsigned Opc = MI.getOpcode();
+  (void)Opc;
   assert(Opc == TargetOpcode::G_UADDO || Opc == TargetOpcode::G_SADDO);
   if (!mi_match(MI.getOperand(3).getReg(), MRI, m_SpecificICstOrSplat(0)))
     return false;